CN103358287B - Electric hammer - Google Patents
Electric hammer Download PDFInfo
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- CN103358287B CN103358287B CN201210105620.2A CN201210105620A CN103358287B CN 103358287 B CN103358287 B CN 103358287B CN 201210105620 A CN201210105620 A CN 201210105620A CN 103358287 B CN103358287 B CN 103358287B
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- filter chamber
- control element
- filter
- electric hammer
- accommodation space
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- 239000000314 lubricant Substances 0.000 claims abstract description 42
- 230000007246 mechanism Effects 0.000 claims abstract description 41
- 230000004308 accommodation Effects 0.000 claims abstract description 38
- 230000000694 effects Effects 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 11
- 230000001050 lubricating effect Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 description 52
- 230000033001 locomotion Effects 0.000 description 17
- 238000009527 percussion Methods 0.000 description 13
- 238000007789 sealing Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 240000009087 Crescentia cujete Species 0.000 description 1
- 235000005983 Crescentia cujete Nutrition 0.000 description 1
- 235000009797 Lagenaria vulgaris Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
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Abstract
The present invention relates to a kind of electric hammer, comprise driving mechanism, for driving working head; Hold the accommodation space of driving mechanism, in accommodation space, be provided with the lubricant that driving mechanism is lubricated; Be communicated with the path that accommodation space is inner and outside; Be provided with in path filter chamber, the first passage that filter chamber is communicated with the inside of accommodation space, by the second channel of the ft connection of filter chamber and accommodation space, the filter being used for adsorpting lubrication agent is set in filter chamber, in filter chamber, is also provided with the control element of selectively conducting or Turn Off Path.The present invention utilizes selectively conducting or the closedown of control element controllability path, can effectively prevent the lubricant lubricating driving mechanism from leaking upon closing, when closed, the hyperbar of the accommodation space of accommodating driving mechanism can outwards overflow, and reaches and reduces internal pressure effect.
Description
Technical field
The present invention relates to a kind of electric hammer that can adjust the internal pressure of the accommodation space of accommodating driving mechanism.
Background technology
In order to make tool heads carry out percussion action and carry out spinning movement in the circumferential on long axis direction, in the housing of electrically operated hammer, be equipped with the driving mechanism be driven by a motor.In the accommodation space of accommodating driving mechanism, be filled with the lubricant for lubricating driving mechanism, and accommodation space forms closed structure, in order to avoid the lubricant of filling spills laterally.For electrically operated hammer, when driving driving mechanism, the heat produced due to the action with driving mechanism, the air bulbs of pressure in housing raise, and the impact now likely producing driving mechanism is bad, or lubricant may spill laterally from housing.
Disclose in TOHKEMY 2008-36754 publication can adjust accommodation space pressure to eliminate the electrically operated hammer of such bad phenomenon.In the electrically operated hammer that this publication is recorded, by filter chamber, the internal path that filter chamber is communicated with the accommodation space of housing with the external path of filter chamber and ft connection is formed pressure adjusting path, and in filter chamber, with with formed in this filter chamber opening external path open circumferential part from state, be configured with filter, suppress the lubricant in accommodation space to flow out to outside thus.
According to this publication invention disclosed, constitute the internal pressure of adjustment accommodation space, while prevent the technology that the lubricant in this accommodation space spills, but there is further room for improvement in the technology preventing lubricant from spilling.
In addition if Chinese patent application publication number is disclose a kind of electric hammer establishing steam vent on reduction box casing in CN1532015A.This steam vent is equally as the mechanism of balance internal pressure, this steam vent has the inner passage connecting reduction box inside and the external channel being connected outside, between inner passage and external channel, be provided with mazy trend, make gas move to by this steam vent the distance walked required for external channel from inner passage longer.The shortcoming of this structure is that this vent structure is more complicated, and manufacturing process is loaded down with trivial details.And in the process of externally to be drained by this steam vent at air-flow, lubricant is mingled with and is discharged to outside together in the gas flow, and steam vent can not suppress inner lubricant to flow to outside.Cause the passage of reduction box in-lubricant, reduce lubricant effect.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of internal pressure adjusting the accommodation space of accommodating driving mechanism, while realize the electric hammer of the effect preventing lubricant from spilling further.
The present invention solves the technical scheme that prior art problem adopts: a kind of electric hammer, comprises driving mechanism, for driving working head; Hold the accommodation space of driving mechanism, in accommodation space, be provided with the lubricant that driving mechanism is lubricated; Be communicated with the path that accommodation space is inner and outside; Be provided with in path filter chamber, the first passage that filter chamber is communicated with the inside of accommodation space, by the second channel of the ft connection of filter chamber and accommodation space, the filter being used for adsorpting lubrication agent is set in filter chamber, in filter chamber, is also provided with the control element of selectively conducting or Turn Off Path.
Preferably, first passage is vertically positioned at the below of filter chamber.
Preferably, have spatial accommodation between filter and first passage, control element is positioned at spatial accommodation.
Preferably, control element is the flat member covering first passage outlet, makes flat member close first passage.
Preferably, filter vertically touch controls element be supplied to the pressure of control element towards first passage.
Preferably, there is gap diametrically and between filter chamber in control element.
Preferably, the material of control element is oilpaper.
Preferably, the material of filter is felt.
Preferably, electric hammer has the filling mouth of filling lubricant to accommodation space inside and the cap component be removably positioned on filling mouth, and filter chamber is arranged on cap component.
Preferably, electric hammer also comprises the filter cap covering filter, in the circumferential space of second channel between filter cap and filter chamber.
Preferably, control element is check valve, make the air-flow of accommodation space inside to flow to outside, and the air-flow of outside cannot flow into the inside of accommodation space.
Compared with prior art, beneficial effect of the present invention is: utilize selectively conducting or the closedown of control element controllability path, can effectively prevent the lubricant lubricating driving mechanism from leaking upon closing, when closed, the hyperbar of the accommodation space of accommodating driving mechanism can outwards overflow, and reaches and reduces internal pressure effect.
Accompanying drawing explanation
Above-described object of the present invention, technical scheme and beneficial effect by the detailed description that can realize specific embodiments of the invention below, can describe and clearly obtain simultaneously by reference to the accompanying drawings.
Identical label in accompanying drawing and description and symbol are for representing identical or equivalent element.
Fig. 1 is the schematic diagram that the electric hammer of one embodiment of the invention removes part casing.
Fig. 2 is the enlarged diagram of the a-quadrant shown in Fig. 1.
Fig. 3 is the enlarged diagram that in the B region shown in Fig. 1, pressure adjusting path is in closedown.
Fig. 4 is that in the B region shown in Fig. 1, pressure adjusting path is in the enlarged diagram opened.
Fig. 5 is the decomposing schematic representation of the pressure adjusting path shown in Fig. 1.
1, electric hammer 2, main part 3, working head
4, handle 5, casing 6, axis
7, chuck 8, motor shell 9, reduction box
10, CD-ROM drive motor 11, output shaft 12, rotation
13, reduction box casing 14, movement conversion mechanism 15, beater mechanism
16, inner space 17, bent axle 18, crank arm
19, piston 20, cam pin 21, cylinder
22, percussion hammer 23, lance 24, air chamber
25, connecting portion 26, operating parts 27, pressure adjusting path
28, mouth 29, filter chamber 30, filter is filled
31, control element 32, filter cap 33, bottom
34, location division, sidepiece 35, first location division 36, second
37, sealing ring 38, first exports the 39, second outlet
40, annular channel 41, step 42, gap
Detailed description of the invention
Embodiments of the present invention are described in detail referring to Fig. 1 to Fig. 2.Present embodiment uses electric hammer to be described as an embodiment of power tool.As shown in Figure 1, electric hammer 1 mainly includes main part 2, working head 3 and handle 4.Wherein, main part 2 has the casing 5 forming electric hammer 1 outline, and has a longitudinal axis 6.Working head 3 is positioned at the front end area (Fig. 1 shows left side) of main part 2.The front end area of main part 2 also comprises the chuck 7 connecting casing 5.Working head 3 is removably mounted on via chuck 7 on the axis 6 that extends forwards, backwards.Working head 3 to be arranged on after chuck 7 can on axis 6 direction with chuck 7 relative movement.And handle 4 is connected to the rear end side (with the opposition side of working head) of main part 2.Handle 4 grips use for operator.For convenience of explanation, before working head 3 side is called, after handle 4 side is called.
Main part 2 also comprises motor shell 8 and reduction box 9.Wherein, motor shell 8 is roughly positioned at the stage casing of main part 2.In the present embodiment, motor shell 8 and casing 5 are integrally formed, and adopt identical material to make.In other embodiments, motor shell 8 and casing 5 also can adopt different materials or different manufacturing process to make, and are mutually permanently connected.Holding drive 10 in motor shell 8.CD-ROM drive motor 10 has the output shaft 11 for outputting rotary power, and the rotation 12 of output shaft 11 is on the vertical vertical direction of the longitudinal axis 6 of main part 2.Reduction box 9 is positioned at the stage casing of main part 2 equally.Reduction box 9 is positioned at casing 5, and reduction box 9 extends roughly along the longitudinal direction.Reduction box 9 has reduction box casing 13, accommodates movement conversion mechanism 14 and beater mechanism 15 in reduction box casing 13.As shown in the figure, the output shaft 11 of CD-ROM drive motor 10 connects movement conversion mechanism 14 by common kinds of drive such as gears.The rotation of CD-ROM drive motor 10 is exported be passed to after being converted into rectilinear motion by motion changing mechanism 14 on beater mechanism 15, produce the impulsive force on longitudinally axis 6 direction via this beater mechanism 15 and be finally delivered on working head 2.
The outline of reduction box 9 surrounds covering by reduction box casing 13.The inner space 16 of reduction box 9 forms external lands by the gapless confined space sealed, in this inner space 16, be sealed with the lubricant lubricated motion changing mechanism 14.Lubricant lubricates machineries such as the gears of reduction box 9 inside, to keep the job stability of electric hammer.Lubricant can adopt grease or lubrication wet goods lubricant medium.
In the present embodiment, motion changing mechanism 14 is made up of crank mechanism.This crank mechanism comprises bent axle 17, crank arm 18 and piston 19 etc. as actuator.Wherein, bent axle 17 to be slowed down ground rotary actuation by CD-ROM drive motor 10 via multiple gear drive, crank arm 18 be connected to this bent axle 17 via cam pin 20 depart from the position of pivot, piston 19 is just by 18 straight reciprocating motions carrying out along axis 6 direction of cranking arm.Piston 19 can slidably be arranged in cylinder 21.Along with CD-ROM drive motor 10 is excited driving, piston 19 carries out linearly operating along cylinder 21.
Beater mechanism 15 mainly includes the percussion hammer 22 as impulse member and the lance 23 as middleware.Wherein, percussion hammer 22 is positioned at the front side of piston 19, and can slidably be configured in the inwall of cylinder 21.Lance 23 is positioned at the front side of percussion hammer 22, and can slidably be configured in chuck.The kinetic energy of percussion hammer 22 can be passed to working head 2 by lance 23.Cylinder 21 inside between percussion hammer 22 and piston 19 forms airtight air chamber 24.Along with the sliding action of the linear reciprocation of piston 19, air chamber 24 is by compression repeatedly or the so-called air spring of formation that expands.Air spring drives percussion hammer 22, and is clashed into the lance 23 be slidably configured in chuck 7 by percussion hammer 22, via this lance 23, impulsive force is passed to working head 3.
As shown in Figure 1, handle 4 extends on the vertical vertical direction in the longitudinal axis direction of working head, and be formed with connecting portion 25 outstanding forward in the upper and lower end parts of bearing of trend, this upper and lower connecting portion 25 is connected on the rear portion of main part 2, thus handle 4 be formed through side that upper and lower two places are connected with main part 2 observe under approximate " D " shape.Being configured with the operating parts 26 operated by operator at the upper area of handle 4, driving the power switch of CD-ROM drive motor 10 to switch between open position and closed position for being energized.Certain operating parts 26 can also be arranged on the position of other convenient operations.
For above-mentioned electric hammer 1, if operator applies pressing force forwards to main part 2 and by working head 3 by under the state being pressed in workpiece, then energising drives CD-ROM drive motor 10, then make piston 19 carry out sliding action point-blank along cylinder 21 via the motion changing mechanism 14 based on crank mechanism.When piston 19 carries out sliding action, by the effect of the air spring of the air chamber 24 in cylinder 21, percussion hammer 22 in cylinder 21 forwards motional collision on lance 23, make the kinetic energy of lance 23 be passed to working head 3 thus.Such working head 3 pairs of workpiece (such as concrete) carry out hammering work.
But when utilizing electric hammer 1 to carry out hammering operation, because of the driving of motion changing mechanism 14 and beater mechanism 15, the inner space 16 of reduction box 9 generates heat, air in the inner space 16 thereupon sealed expands, pressure raises, and the pressure in the space between the percussion hammer 22 be now communicated with inner space 16 and lance 23 raises too.Consequently, at the sliding action by piston 19, when utilizing the effect of the air spring in the air chamber 24 of cylinder 21 to make percussion hammer 22 carry out linearly operating, space likely between destruction percussion hammer 22 and lance 23 and the pressure balance of air chamber, produce the state of this lance 23 rectilinear motion abnormally, namely cause impact bad.In addition, if the pressure of the inner space 16 of reduction box 9 raises, then the lubricant in this inner space 16 may spill from the sealing surface of reduction box casing 13 to the outside of reduction box 9.Therefore, in order to eliminate such defect, reduction box 9 is provided with pressure adjusting path 27, when the internal pressure of pressure adjusting path 27 in inner space 16 rises, the outside being flowed out to reduction box 9 by the air of this inner space 16 adjusts internal pressure.Pressure adjusting path 27 corresponds to " path " of the present invention.Inner space 16 corresponds to " accommodation space " of the present invention.
The structure to the pressure adjusting path 27 that the internal pressure of reduction box 9 adjusts is shown in figure 3 with enlarged drawing.Pressure adjusting path 27 is by the inside of reduction box 9 and ft connection.In the upper surface side of reduction box 9, namely be in the position of upper surface side under the approximate horizontal state of the longitudinal axis 6 of working head 3 at the handle 4 of user's electric hammer dominated by hand 1, mouth 28 is filled in the opening portion that lubricant is filled in the inner space 16 be provided with to reduction box 9 namely.In the present embodiment, the cap component mineralization pressure adjustment path 27 be removably mounted on this filling mouth 28 is utilized.Because pressure adjusting path 27 is arranged on the upper surface side of reduction box 9, pressure adjusting path 27 is vertically arranged.This cap component also can with reduction box casing 14 Integral design.Certainly in other embodiments, pressure adjusting path 27 is not arranged on cap component, and is located at other positions of electric hammer 1.
As shown in Figures 3 to 5, cap component is based on filter chamber 29, filter 30, control element 31 and filter cap 32.Wherein, mouth 28 is filled for blocking by filter chamber 29.In the present embodiment, filter chamber 29 is configured to the cylindrical shape of uncovered.Filter chamber 29 comprise lay respectively at below bottom 33 and annular around the sidepiece 34 of bottom 33.During installation, bottom 33 is through filling mouth 28 and inwardly space 16.Sidepiece 34 has the second location division 36 of the first location division 35 and contiguous first location division 35.First location division 35 mainly coordinates with the reduction box casing 13 of filling near mouth 28.The lateral surface of the first location division 35 has external screw thread, and reduction box casing 13 has corresponding internal thread, and the first location division 35 is fixedly connected with reduction box casing 13 by screw thread thus.Certain first location division 35 can also adopt other common fixed forms to be connected with reduction box casing 13.Such filter chamber 29 can not produce relative movement when working with reduction box casing 13, ensures filter chamber 29 and reduction box casing 13 high-seal.Second location division 36 mainly coordinates with the casing 5 of filling near mouth 28.Compared to the first location division 36, location division 35, second further from the bottom 33 of filter chamber 29.As shown in Figure 5, the external diameter of the second location division 36 is greater than the external diameter of the first location division 35, thus the second location division 36 is radially outward protruded compared to the first location division 35.Second location division 36 contacts with casing 5 end-face friction, and be provided with the sealing ring 37 of O type between the lower surface and the end face of reduction box casing 13 of the second location division 36, sealing ring 37 comes the gap between the chimeric surface between sealed reduction gearbox housing 13 and the second location division 36 by elastic deformation.The top of filter chamber 29 forms opening, and filter cap 32 embeds from top and is arranged on the opening of this filter chamber 29.In the present embodiment, filter cap 32 is embedded on the step 41 of the second location division 36 formation.The space be surrounded by the sidepiece 34 of filter chamber 29, bottom 33 and filter cap 32 is for accommodating filter 30 and control element 31.
In addition, the first outlet 38 is provided with in the substantial middle position of the bottom 33 of filter chamber 29.Filter chamber 29 is communicated with the inner space 16 of reduction box 9 by the first outlet 38.By this first outlet 38, air-flow can flow to the inner space 16 of reduction box 9 from filter chamber 29, also can flow to filter chamber 29 from the inner space 16 of reduction box 9.This first outlet 38 corresponds to " first passage " of the present invention.This first outlet 38 is vertically positioned at the below of filter chamber 29.The outlet of the first outlet 38 exports the entrance of 38 towards the inner space 16 of reduction box 9 towards filter chamber 29, first.In the present embodiment, the radial radius size of the first outlet 38 is constant, and whole first outlet 38 is roughly in cylindricality.In other examples, the radial radius of the first outlet 38 can be change, such as, as funnel type, calabash shape etc.
The filter cap 32 covering filter 30 not fits tightly with the sidepiece 34 of filter chamber 29.At step 41 place of the second location division 36, the internal diameter of the second location division 36 is greater than the external diameter of filter cap 32, therefore there is annular gap between the second location division 36 and filter cap 32, and this gap is connection filter chamber 29 and exports 39 with outside second.By this second outlet 39, air-flow can flow to filter chamber 29 from outside, also can flow to outside from filter chamber 29.This second outlet 39 corresponds to " second channel " of the present invention.In other examples, the second outlet 39 can be provided with in the substantial middle position embedding the filter cap 32 in filter chamber 29 opening.38 similar with the first outlet, the radial radius of the second outlet 39 can be change or changeless.
The filter 30 be contained in filter chamber 29 is disconnectable.In the present embodiment, filter 30 felt is formed, and its surface has adsorption structure, is mainly used in adsorbing and catches via the lubricant in the first outlet 38 inflow filter chamber 29.The external diameter of filter 30 and the internal diameter of filter chamber 29 accommodation space roughly equal, filter 30 is to be inserted in filter chamber 29 and to occupy most of space of filter chamber 29.But at the lower area of filter chamber 29 accommodation space, namely form clearance spaces between the lower surface of filter 30 and the bottom 33 of filter chamber 29.Clearance spaces corresponds to " spatial accommodation " of the present invention.
Control element 31 is provided with in this clearance spaces.More specifically, control element 31 is for being configured in the flat member of the lower surface of filter 30.Control element 31 is conducting or closing presure adjustment path 27 selectively.Owing to considering the downward elastic pressure effect of filter 30, control element 31 is compressed on the bottom 33 of filter chamber 29, and fits tightly with bottom 33.Meanwhile, control element 31 has blocked the first outlet 38 being positioned at 33 middle positions, bottom on bottom.Therefore be communicated with filter chamber 29 to export 38 with first of reduction box 9 inner space 16 and be closed, as shown in Figure 3.Now, control element 31 closes the first outlet 38, and whole pressure adjusting path 27 is in the state of closedown.Air-flow cannot flow to filter chamber 29 from inner space 16.The lubricant of reduction box 9 inside also can not flow out from the first outlet 38, and it is inner that lubricant is closed in reduction box 9 all the time.Such control element 31 serves good sealing effectiveness after closing the circulation of the first outlet 38.Certainly, if apply External Force Acting to control element 31, make control element 31 overcome the pressure of filter 30 and relative movement, then just there is gap 42 between exporting 38 in control element 31 and first, as shown in Figure 4.Now control element 31 is not in the state that sealing first exports 38, control element 31 conducting first outlet 38, and then whole pressure adjusting path 27 is in the state of conducting.
In the present embodiment, control element 31 is rounded.Control element 31 is installed between the lower surface of filter 30 and the bottom 33 of filter chamber 29, its center roughly exports 38 overlapping with first, and the radius of control element 31 and first exports the internal diameter of 38, therefore the area of control element 31 is greater than the area in the exit of the first outlet 38, make control element 31 can cover the exit of the first outlet 38 completely, thus control element 31 enclose the first outlet 38.On the other hand, the radius of control element 31 is less than the internal diameter of the filter chamber 29 surrounding filter 30, makes the area of control element 31 be less than the sectional area of filter chamber 29, makes radial direction above there is gap between control element 31 and the sidepiece 34 of filter chamber 29.Form annular channel 40 between the inner surface of the sidepiece 34 of filter chamber 29 and the outer peripheral face of control element 31 thus, air-flow can enter the central authorities of filter chamber 29 from this annular channel 40 from the first outlet 38.In addition, the material of control element 31 can be oilpaper.This kind of material is not easy seepage, makes lubricant can not be caused seepage through this kind of material by good sealing.Meanwhile, the density of this kind of material has smaller, makes whole control element 31 lighter.Certainly, control element 31 adopts other materials that can reach similar effect to be also fine.
When utilizing electric hammer 1 to carry out hammering operation, a large amount of heat is created along with the motion because of movement conversion mechanism 14 and beater mechanism 15, the air heats of airtight reduction box 9 inner space 16 is caused to expand, thus the pressure increase of inside exceeded outside pressure.When the pressure exceeded is greater than certain value, the active force that the pressure differential near the first outlet 38 produces overcomes the downward pressure that filter 30 applies, by the control element 31 upwards jack-up of sealing originally first outlet 38.Control element 31 no longer fits tightly with the bottom 33 of filter chamber 29 thus, there is gap 42, first outlet 38 between the two and is in the state opened.Under the more anticyclonic effect in inner space 16, air-flow from the gap of inner space 16 successively bottom the first outlet 38, control element 31 and filter chamber 29 between 33, the annular channel 40 between control element 31 and the sidepiece 34 of filter chamber 29 and flow into filter chamber 29, so just can lower the hyperbar in inner space 16.Air-flow is through after filter 30, then the second outlet 39 in filter cap 32 flows to outside.Air-flow flows to outside as shown in the arrow in the pressure adjusting path 27 of Fig. 4 from inside.So repeatedly such process, until the few and outside pressure of the pressure differential of reduction box 9 inner space 16 reaches balance.The pressure increase of reduction box 9 inner space 16 can be suppressed by this quadrat method, prevent because reduction box 9 inner space 16 pressure is high that impact that is that cause is bad.In fig. 2, with arrow, air flowing when carrying out pressure adjusting is shown.
In the present embodiment, in filter chamber 29, be equipped with the filter 30 to flowing into the lubricant in filter chamber 29 with air-flow and adsorbing.Therefore along with above-mentioned pressure Excretion, the lubricant of the inner space 16 of reduction box 29, from the first opening 38 flow into the condition of filter chamber 29, utilizes filter 30 to adsorb and catches these lubricants, thus can prevent lubricant from externally spilling.
Therefore, control element 31 is equivalent to the effect playing one-way cock, controls the closedown of whole pressure adjusting path 27 or open.When the air pressure of the inner space 16 of reduction box 9 is little, control element 31 fits tightly the first opening 38, thus encloses whole pressure adjusting path 27.Now, the inner space 16 of reduction box 9 is closed, and lubricating oil can not be leaked in outside, ensure that the reliability of reduction box internal work.When the air pressure of the inner space 16 of reduction box 9 is higher than external pressure certain value, gap is there is between control element 31 and the first opening 38, whole pressure adjusting path 27 is communicated with, now, the hyperbar of inner space 16 is excreted in outside along with pressure adjusting path 27, serves the effect adjusting internal pressure well.The lubricant simultaneously flowed with air pressure is attracted in filter 30, and can not be discharged to outside, thus can not pollute outside.To collect lubricant, opened filter cap 32 can take out filter 30, the lubricant that filter 30 adsorbs suitably is collected.
Certainly, the present invention does not limit control element 31 for flat member.Any element that can play one-way cock effect can as control element 31.Such as, using elastic component as control element, utilize the biasing force of elastic component 31 as unidirectional governing factor.In addition, also using electronic component as control element, air pressure detector can be established in inside, filter chamber 9, when air pressure detector detect air pressure too high time, give controller signal transmission, controller according to signal again controlled pressure adjustment path carry out conducting.And control element 31 is not only conducting for control first opening 38 and closedown, control element 31 also can be used for the conducting of control second opening 39 and closedown, its final object is all the same, is all to control opening or closing of whole piece pressure adjusting passage 27.
According to the present embodiment, annular channel 40 between the outside of control element 31 and the sidepiece 34 of filter chamber 29 makes to be flowed by throttling by filter chamber 29 air that filter 30 flows out upward, be lowered by the air velocity of filter 30, result filter 30 is easy to adsorpting lubrication agent, thus lubricant can be suppressed externally to flow out.
In addition, control element 31 can also play to advance and hinder the effect of component, namely blocks the flowing flowing into the air that also will advance to the second opening 39 in filter chamber 29 from the first opening 38.Therefore, the air flowing to central authorities of filter chamber 29 from the first opening 38 flows to external diameter direction from central portion, the annular channel 40 of the outside diameter of this backward control element 31 flows, and thus can extend the circulation distance of the air flowed in filter chamber 29 compared with not having the situation of control element 31.Therefore the capture region utilizing filter 30 to catch lubricant expands, thus can improve the absorption property of filter 30 pairs of lubricants.
The present invention is not limited to lifted specific embodiment structure, and the structure based on the present invention's design all belongs to scope.
Claims (10)
1. an electric hammer, comprises driving mechanism, for driving working head; Hold the accommodation space of described driving mechanism, in described accommodation space, be provided with the lubricant that described driving mechanism is lubricated; Be communicated with the path that described accommodation space is inner and outside; Be provided with in described path filter chamber, the first passage that described filter chamber is communicated with the inside of described accommodation space, by the second channel of the ft connection of described filter chamber and described accommodation space, filter for adsorbing described lubricant being set in described filter chamber, it is characterized in that: be also provided with selectively conducting in described filter chamber or close the control element that can play one-way cock effect in described path.
2. electric hammer according to claim 1, is characterized in that: described first passage is vertically positioned at the below of described filter chamber.
3. electric hammer according to claim 2, is characterized in that: have spatial accommodation between described filter and described first passage, and described control element is positioned at described spatial accommodation.
4. electric hammer according to claim 3, is characterized in that: described control element is the flat member covering the outlet of described first passage, makes described flat member close described first passage.
5. electric hammer according to claim 4, is characterized in that: described filter vertically contacts described control element and is supplied to the pressure of described control element towards described first passage.
6. electric hammer according to claim 3, is characterized in that: described control element exists gap diametrically and between described filter chamber.
7. electric hammer according to claim 2, is characterized in that: the material of described control element is oilpaper.
8. electric hammer according to claim 2, is characterized in that: the material of described filter is felt.
9. electric hammer according to claim 2, is characterized in that: described electric hammer has the filling mouth of filling described lubricant to described accommodation space inside and the cap component be removably positioned on described filling mouth, and described filter chamber is arranged on described cap component.
10. electric hammer according to claim 2, is characterized in that: described electric hammer also comprises the filter cap covering described filter, in the circumferential space of described second channel between described filter cap and described filter chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210105620.2A CN103358287B (en) | 2012-03-31 | 2012-03-31 | Electric hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210105620.2A CN103358287B (en) | 2012-03-31 | 2012-03-31 | Electric hammer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103358287A CN103358287A (en) | 2013-10-23 |
| CN103358287B true CN103358287B (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210105620.2A Expired - Fee Related CN103358287B (en) | 2012-03-31 | 2012-03-31 | Electric hammer |
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| CN (1) | CN103358287B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3023354A1 (en) * | 2014-11-21 | 2016-05-25 | HILTI Aktiengesellschaft | Handheld tool gear closure and handheld machine tool |
| CN105003812B (en) * | 2015-08-05 | 2017-03-15 | 浙江恒友机电有限公司 | A kind of oil piping system of circulating filtration and a kind of fullering tool |
| CN108326804A (en) * | 2017-01-20 | 2018-07-27 | 苏州宝时得电动工具有限公司 | A kind of reduction box pressure equaliser of electric tool |
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| CN101992455A (en) * | 2009-08-05 | 2011-03-30 | 株式会社牧田 | Power tool |
| JP4726732B2 (en) * | 2006-08-04 | 2011-07-20 | 株式会社マキタ | Work tools |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10045619C1 (en) * | 2000-09-15 | 2002-05-29 | Bosch Gmbh Robert | Machine tool with a room with lubricant and a pressure compensation device of the room |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1532015A (en) * | 2003-03-25 | 2004-09-29 | 罗伯特・博施有限公司 | Electric tool |
| CN1872498A (en) * | 2005-06-02 | 2006-12-06 | 株式会社牧田 | Power tool |
| JP4726732B2 (en) * | 2006-08-04 | 2011-07-20 | 株式会社マキタ | Work tools |
| CN101524836A (en) * | 2008-03-05 | 2009-09-09 | 株式会社牧田 | Operation tool |
| CN101992455A (en) * | 2009-08-05 | 2011-03-30 | 株式会社牧田 | Power tool |
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