CN221336893U - Electric chain saw - Google Patents

Abstract

The utility model provides an electric chain saw, which relates to the technical field of electric chain saws. The electric chain saw includes: a housing; a control panel, which is arranged in the housing; a cutter, which is installed on the housing and includes a cutter chain and a cutter plate for supporting the cutter chain; a motor, which is fixed in the housing and is used to drive the cutter to work; a fan, which is fixed to the rotating shaft of the motor; the fan includes: a first blade, a plurality of first blades in a circular array; a rear baffle, which is arranged on the side of the fan close to the motor; a second blade, which is arranged on the side of the rear baffle away from the first blade, and the second blade is arranged in the same direction as the first blade. By setting the second blade, the second blade is arranged in the same direction as the first blade, and the second blade forms an airflow seal when the fan rotates, thereby ensuring that the heat discharged by the fan is discharged from the housing along a predetermined channel and does not flow back to the motor and the main board, thereby effectively improving the problem that the existing electric chain saw has poor heat dissipation effect and the machine is prone to high temperature protection.

Description

Electric chain saw

Technical Field

The utility model relates to the technical field of electric chain saws, in particular to an electric chain saw.

Background technique

Traditional gasoline-driven chainsaws and oil saws on the market can have great power, but they are noisy and polluting. After the introduction of electric chain saws, the pollution problem can be largely solved. However, most electric chain saws have poor heat dissipation effect, especially when the outdoor environment temperature is high, which leads to high temperature protection during the cutting process, affecting the user's work and cutting experience. People's demand for high-performance and good heat dissipation electric chain saws is self-evident.

Utility Model Content

In view of the above shortcomings of the prior art, the utility model provides an electric chain saw to improve the technical problems of the prior electric chain saw, that is, the heat dissipation effect is poor and the machine is prone to high temperature protection.

To achieve the above-mentioned purpose and other related purposes, the utility model provides an electric chain saw, which includes: a shell; a control panel arranged in the shell; a cutter installed on the shell and including a cutter chain and a cutter plate for supporting the cutter chain; a motor fixed in the shell and used to drive the cutter to operate; a fan fixed to the rotating shaft of the motor; the fan includes: a first blade and a plurality of first blades in a circular array; a rear baffle arranged on the side of the fan close to the motor; a second blade arranged on the side of the rear baffle away from the first blade, and the second blade is arranged in the same direction as the first blade.

In an exemplary embodiment of the present application, the motor includes a housing, and the outer diameter of the fan is greater than the outer diameter of the housing.

In an exemplary embodiment of the present application, the rear baffle is disposed on the outer periphery of the housing.

In an exemplary embodiment of the present application, the electric chain saw includes a volute, the volute is sleeved outside the motor and the fan, and the volute is provided with an air outlet at the fan.

In an exemplary embodiment of the present application, the air flow passage of the volute gradually expands along the rotation direction of the fan.

In an exemplary embodiment of the present application, the volute is provided with a step at the rear baffle, and the outer diameter of the volute sleeved at the first blade is larger than the outer diameter of the volute sleeved at the rear baffle.

In an exemplary embodiment of the present application, an air inlet window and an air outlet window are disposed on the shell, and the air inlet window and the air outlet window are disposed on the same side of the shell.

In an exemplary embodiment of the present application, a heat sink is disposed on the control board, and the airflow entering the housing through the air inlet window at least partially passes through channels between the heat sinks.

In an exemplary embodiment of the present application, the heat sink is parallel to the airflow entering through the air inlet window.

In an exemplary embodiment of the present application, a buffer block is disposed outside the control panel.

The beneficial effects of the utility model are:

By setting a rear baffle, the gas backflowing to the motor and the main board can be effectively reduced; by setting a second blade, the second blade is arranged in the same direction as the first blade, and the second blade forms an airflow seal when the fan rotates, thereby ensuring that the heat exhausted by the fan is discharged from the shell along a predetermined channel and does not flow back to the motor and the main board, thereby effectively improving the problem of poor heat dissipation effect of existing electric chain saws and the problem of the machine being prone to high temperature protection.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic diagram of an exemplary electric chain saw of the present application;

FIG2 is a schematic diagram of an exemplary electric chain saw of the present application from another angle;

FIG3 is a front view of an exemplary electric chain saw of the present application;

Fig. 4 is a cross-sectional view of the A-A section in Fig. 3 of the present application;

Fig. 5 is a cross-sectional view of the B-B section in Fig. 3 of the present application;

FIG6 is a schematic diagram of the B-B section in FIG3 of the present application from another angle;

FIG7 is an enlarged view of area C in FIG2 of the present application;

FIG8 is a schematic diagram of a partial structure of an exemplary electric chain saw of the present application;

FIG9 is a schematic diagram of an exemplary motor and fan after assembly according to the present application;

FIG10 is a schematic diagram of another angle of an exemplary motor and fan assembly according to the present application;

FIG11 is a cross-sectional view of an exemplary motor and fan after assembly according to the present application;

FIG12 is a schematic diagram of the structure of an exemplary fan and a volute of the present application;

FIG13 is a front view of an exemplary fan and volute of the present application;

FIG14 is a cross-sectional view of an exemplary fan and volute of the present application;

FIG15 is a schematic diagram of the cross section of FIG12 of the present application from another angle;

FIG16 is a schematic diagram of an exemplary fan of the present application;

FIG17 is a schematic diagram of an exemplary fan of the present application from another angle;

FIG. 18 is a schematic cross-sectional view of an exemplary fan of the present application.

Component number description

100, housing; 110, air inlet window; 111, partition; 112, connecting rod; 120, air outlet window; 200, control panel; 210, heat sink; 220, buffer block;

300, knife; 310, knife chain; 320, knife plate;

400, motor; 410, rotating shaft; 420, housing;

500, fan; 510, first blade; 520, rear baffle; 530, second blade; 540, front baffle; 550, center hole;

600. volute; 610. step; 620. air outlet.

Detailed ways

The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific implementation schemes, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or under the conditions recommended by the manufacturers.

When numerical ranges are given in the embodiments, it should be understood that unless otherwise specified in the present invention, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention are in accordance with the prior art mastery of those skilled in the art and the description of the present invention, and any prior art methods, equipment and materials similar or equivalent to the methods, equipment and materials in the embodiments of the present invention can also be used to implement the present invention.

It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present utility model without substantially changing the technical content.

Please refer to Figures 1 to 6. The present application provides an electric chain saw, which includes a housing 100, a control panel 200, a cutter 300, a motor 400 and a fan 500. The control panel 200 is disposed in the housing 100. The control panel 200 can be directly fixed to the housing 100 or fixed to the housing 100 through other fixing members. The cutter 300 is mounted on the housing 100. The cutter 300 includes a cutter chain 310 and a cutter plate 320 for supporting the cutter chain 310. The motor 400 is fixed in the housing 100 to drive the cutter 300 to perform operations. The fan 500 is fixed to the rotating shaft 410 of the motor 400.

Please refer to FIG. 16 to FIG. 18 , the fan 500 includes a first blade 510, a rear baffle 520 and a second blade 530. The first blade 510 is arranged in a circumferential array, the rear baffle 520 is arranged on the side of the fan 500 close to the motor 400, and the second blade 530 is arranged on the side of the rear baffle 520 away from the first blade 510. The second blade 530 is arranged in the same direction as the first blade 510. By setting the rear baffle 520, the wind blown out of the fan 500 can be reduced from flowing back into the motor 400. By setting the second blade 530 arranged in the same direction as the first blade 510, the second blade 530 forms an airflow seal, further ensuring that the hot wind blown out of the fan 500 does not flow back into the motor 400, effectively improving the heat dissipation capacity of the fan 500, improving the problem of high temperature protection caused by excessive temperature of the machine, and improving the durability of the machine.

Please refer to FIG. 9 to FIG. 11. Exemplarily, the motor 400 includes a housing 420, and the outer diameter of the fan 500 is larger than the outer diameter of the housing 420. By increasing the outer diameter of the fan 500, that is, increasing the outer diameter of the first blade 510, the air volume of the fan 500 can be increased and the heat dissipation capacity can be improved. Exemplarily, according to the rotation direction of the fan 500 when working, the first blade 510 is a forward-inclined spiral blade, which further increases the wind pressure of the first blade 510 when working, and improves the heat dissipation effect of the fan 500. Exemplarily, the outer diameter of the motor 400 is 25 to 75 mm, and the outer diameter of the first blade 510 is 40 to 100 mm. The outer diameter of the motor 400 can be any value between 25 and 75 mm, such as 25 mm, 50 mm, 75 mm, etc., and the outer diameter of the first blade 510 can be any value between 40 and 100 mm, such as 40 mm, 70 mm, 90 mm, etc. Through the first blade 510 of a larger size, the air volume is increased and the heat dissipation cooling effect is improved.

Please refer to Figures 9 to 11, the rear baffle 520 is arranged on the periphery of the housing 420, and the first blade 510 is arranged on the periphery of the housing 420. By arranging the rear baffle 520 on the periphery of the housing 420, on the one hand, the outlet cross-section of the airflow channel of the motor 400 can be maximized, thereby maximizing the heat dissipation air volume and improving the heat dissipation capacity; on the other hand, the airflow blown out by the fan 500 can be prevented from flowing back, and the exhausted heat can be prevented from flowing back into the motor 400 and the housing 100, further ensuring the heat dissipation effect, and by increasing the heat dissipation amount and reducing the backflow heat, the heat dissipation and cooling effect of the fan 500 is effectively improved, and the occurrence of overheat protection of the machine can be avoided or reduced.

Please refer to Figure 11. As an example, the rotating shaft 410 of the motor 400 is provided with a groove, and the middle part of the fan 500 is a center hole 550. The center hole 550 is sleeved on the groove of the rotating shaft 410. The groove is also provided with a clamp. The fan 500 and the rotating shaft 410 are relatively fixed by the clamp. When the motor 400 is working, the rotating shaft 410 drives the fan 500 to rotate, and the heat generated by the motor 400 is discharged to the outside of the motor 400, thereby achieving the effect of heat dissipation and cooling.

Please refer to Figure 16. As an example, a front baffle 540 is also provided on the fan 500. The front baffle 540 is provided on the side of the first blade 510 away from the motor 400. The front baffle 540 is at least partially provided on the inner periphery of the casing 420. The front baffle 540 is provided to guide the airflow discharged from the fan 500 to prevent the hot gas from flowing axially along the rotating shaft 410 of the motor 400 to cause airflow disturbance, etc., thereby effectively guiding the airflow, increasing the flow speed of the airflow, and improving the heat dissipation capacity of the fan 500.

Please refer to Figures 4 to 6 and Figures 12 to 15. By way of example, the electric chain saw includes a volute 600, which is sleeved outside the motor 400 and the fan 500. The volute 600 separates the motor 400 from other components in the housing 100, such as the control board 200. The volute 600 is sleeved outside the fan 500. The volute 600 is provided with an air outlet 620 at the fan 500. When the fan 500 rotates to dissipate heat, the airflow passes through the control board 200 and other components inside the housing 100, enters the motor 400, passes through the coil of the motor 400 and other gaps, and is then discharged from the fan 500 through the air outlet 620. The volute 600 forms an air flow channel in the shell 100 to ensure that the air flow first passes through the control board 200 and then enters the motor 400. On the one hand, there is a lot of heat in the motor 400, which can avoid the air flow first passing through the motor 400 and then flowing through the control board 200, resulting in poor heat dissipation effect of the control board 200; on the other hand, the motor 400 is the position where the electric chain saw generates the most heat, and the heat generated by the motor 400 is close to the air outlet 620 of the volute 600, which shortens the moving distance of the heat dissipation airflow after passing through the motor 400 in the electric chain saw, and can quickly discharge the heat generated by the motor 400, thereby improving the heat dissipation efficiency and the heat dissipation effect.

Please refer to FIG. 1 and FIG. 3 , illustratively, the airflow channel of the volute 600 gradually expands along the rotation direction of the fan 500, and the volute 600 collects the gas discharged by the fan 500, so that the gas flows out through the air outlet 620 of the volute 600. By gradually expanding the airflow, the airflow thrown out by the fan 500 can be effectively guided out of the air outlet 620, thereby improving the heat dissipation capacity and heat dissipation effect. illustratively, the outer periphery of the volute 600 near the fan 500 is in a threaded shape, and the thread rotation direction of the outer periphery of the volute 600 is the same as the rotation direction of the fan 500, the outer diameter of the volute 600 at the air outlet 620 is the largest, and the airflow channel of the volute 600 is expanded evenly, thereby improving the flow capacity of the airflow.

Please refer to Figures 14 and 15. Exemplarily, the volute 600 is provided with a step 610 at the rear baffle 520. The outer diameter of the volute 600 at the first blade 510 is larger than the outer diameter of the volute 600 at the rear baffle 520. The volute 600 provided with the step 610 can, on the one hand, expand the airflow channel between the volute 600 and the first blade 510 to ensure that the airflow can flow out quickly. On the other hand, the distance between the volute 600 and the rear baffle 520 is small, which can further prevent the airflow exhausted by the fan 500 from flowing back into the motor 400 and the housing 100 through the gap between the volute 600 and the rear baffle 520, thereby ensuring that the airflow sealing of the second blade 530 produces a better effect, and the heat dissipation and cooling capacity of the fan 500 is improved by increasing the exhaust volume and reducing the reflux volume.

Please refer to FIG. 2 , illustratively, the housing 100 is provided with an air inlet window 110 and an air outlet window 120, which are arranged on the same side of the housing 100. The airflow enters the housing 100 through the air inlet window 110. Since the volute 600 isolates the motor 400 and the fan 500, the airflow passes through the control board 200 and other components, the coil area of the motor 400 and the gap between the stator and the rotor of the motor 400, and the fan 500 discharges the hot air out of the machine through the air outlet 620 of the volute 600 and the air outlet window 120 on the housing 100. The air inlet window 110 and the air outlet window 120 are arranged on the same side, so that the airflow can flow through the components in the housing 100 that need to dissipate heat, ensuring that the various components of the machine can effectively dissipate heat and avoiding the problem of overheating protection of the electric chain saw.

Please refer to FIG. 2 and FIG. 7 . Exemplarily, the air inlet window 110 is provided on the housing 100 at the control board 200 , which is conducive to heat dissipation of the control board 200 . The shape of the air inlet window 110 can be square, circular, arc-shaped, etc., and the shape of the air inlet window 110 is adapted to the shape of the housing 100 where the air inlet window 110 is located. Exemplarily, a partition 111 is provided inside the air inlet window 110, and the outer diameter of the partition 111 is adapted to the inner plate of the air inlet window 110. The air inlet window 110 and the partition 111 are connected by a connecting rod 112. A gap for accommodating airflow is provided between the partition 111 and the air inlet window 110. By providing the partition 111, it is possible to prevent debris, sundries, etc. from entering the housing 100 through the air inlet window 110, thereby preventing damage to the components in the housing 100, reducing the maintenance of the electric chain saw, and increasing the service life of the electric chain saw.

Exemplarily, the air inlet window 110 is disposed on the side wall of the housing 100, and the opening direction of the air inlet window 110 is parallel or substantially parallel to the horizontal plane, which can further reduce rainwater, dust, etc. from directly falling into the air inlet window 110, thereby improving the waterproof and dustproof capabilities of the electric chain saw.

Please refer to FIG. 2 to FIG. 3. For example, the air outlet window 120 is arranged on the housing 100 at the air outlet 620 of the volute 600, and the airflow discharged by the fan 500 can be quickly discharged through the air outlet 620 and the air outlet window 120, thereby improving the heat dissipation effect. For example, the air outlet window 120 is arranged on the lower side of the housing 100 to reduce the entry of rainwater, debris, etc. into the housing 100 through the air outlet window 120. For example, the air outlet angle of the air outlet window 120 is the same as the direction of the fan 500 when working, that is, the air outlet window 120 is inclined from the inside of the housing 100 to the outside of the housing 100 toward the front of the rotation of the fan 500. When the airflow flows out through the air outlet 620 of the volute 600, it has a certain inclination angle due to the driving effect of the fan 500. By setting the air outlet window 120 as an inclined surface with the same direction of the airflow discharged from the air outlet 620 of the volute 600, the airflow can be quickly discharged, thereby improving the heat dissipation and cooling effect. Exemplarily, a grille is provided on the air outlet window 120 , and the grille reduces the possibility of debris entering the housing 100 while ensuring the heat dissipation capacity, thereby reducing the maintenance of the electric chain saw and increasing the service life of the electric chain saw.

In one embodiment, the housing 100 includes a left housing and a right housing, the cutter 300 is arranged at the right housing, the air inlet window 110 and the air outlet window 120 are arranged on the left housing, the volute 600 is fixed on the left housing, and the connection between the volute 600 and the left housing is tighter, so that the air outlet 620 of the volute 600 and the air outlet window 120 of the housing 100 are closely matched, effectively ensuring that the airflow can quickly flow out of the electric chain saw through the air outlet 620 of the volute 600 through the air outlet window 120 of the housing 100, thereby improving the heat dissipation effect. Exemplarily, the motor 400 and the control board 200 are fixed to the right housing by fasteners, and the motor 400 and the control board 200 are both fixed to the right housing. There is no need to set wires and wire interfaces on the left housing, which facilitates the assembly connection between the left housing and the right housing, avoids problems such as circuit disconnection during the assembly process, and facilitates the disassembly of the left housing for maintenance. In another embodiment, the components in the electric chain saw are arranged in a mirror image with the above components to meet the needs of operators with different hand habits.

Please refer to FIG5 and FIG8 . Exemplarily, a heat sink 210 is provided on the control board 200. The airflow entering the housing 100 through the air inlet window 110 at least partially passes through the channel between the heat sink 210. By providing the heat sink 210, the heat of the control board 200 is transferred to the heat sink 210 by heat conduction. The heat is promptly conducted out through the heat sink 210 with a larger area, thereby reducing the heat of the control board 200 and avoiding overheating of the components on the control board 200. Exemplarily, the heat sink 210 is an aluminum heat sink 210. The aluminum heat sink 210 has high thermal conductivity. The heat of the control board 200 and the components on the control board 200 is quickly transferred to the aluminum heat sink 210. The heat is diffused into the air through the heat sink 210 in the form of heat radiation and heat conduction, and then the air flows and convects, increasing the speed of heat transfer.

Please refer to FIG. 5 and FIG. 8 , illustratively, the heat sink 210 is parallel or substantially parallel to the airflow entering from the air inlet window 110, and the airflow entering from the air inlet window 110 can quickly flow through the gaps between the heat sink 210, thereby accelerating the heat transfer speed of the heat sink 210. illustratively, the heat sink 210 is perpendicular or substantially perpendicular to the control board 200, increasing the effective heat dissipation area and improving the heat dissipation effect on the control board 200.

Referring to FIG. 4 , illustratively, a buffer block 220 is disposed outside the control panel 200, and the buffer block 220 is disposed between the control panel 200 and the housing 100. During the cutting process of the electric chain saw, the vibration of the electric chain saw can be reduced from being transmitted to the components on the control panel 200, thereby improving the durability of the control panel 200 and extending the service life of the electric chain saw. illustratively, the buffer pad is a rubber pad, which plays a role of shock absorption and buffering, and reduces the vibration of the control panel 200.

Exemplarily, the electric chain saw also includes components such as a handheld part, a switch, a display screen, and a battery compartment. Please refer to existing electric chain saws, and this application will not elaborate on this.

The electric chain saw of the utility model has the beneficial effects of improving the heat dissipation effect and improving the problems of over-temperature protection of the electric chain saw. Therefore, the utility model effectively overcomes some practical problems in the prior art and has a high utilization value and use significance. The above embodiments are only illustrative of the principle and efficacy of the utility model, and are not used to limit the utility model. Anyone familiar with this technology can modify or change the above embodiments without violating the spirit and scope of the utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the utility model should still be covered by the claims of the utility model.

Claims (10)

1. An electric chain saw, comprising:

A housing;

The control panel is arranged in the shell;

A cutter mounted on the housing and including a cutter chain and a cutter plate for supporting the cutter chain;

the motor is fixed in the shell and is used for driving the cutter to operate;

the fan is fixed with the rotating shaft of the motor;

the fan includes:

a first blade, a plurality of first blade circumferential arrays;

The rear baffle is arranged on the side, close to the motor, of the fan;

the second blade is arranged on the side, away from the first blade, of the rear baffle plate, and the second blade and the first blade are arranged in the same direction.

2. The electric chain saw as in claim 1, wherein the motor comprises a housing, the fan outer diameter being greater than an outer diameter of the housing.

3. The electric chain saw as in claim 2, wherein the back plate is disposed on an outer periphery of the chassis.

4. The electric chain saw of claim 1, comprising a volute that is sleeved outside the motor and the fan, the volute being provided with an air outlet at the fan.

5. An electric chain saw according to claim 4 wherein the airflow passage of the volute is gradually enlarged in the direction of rotation of the fan.

6. The electric chain saw as set forth in claim 4, wherein the volute is provided with a step at the tailgate, the outer diameter of the volute sleeved at the first blade being larger than the outer diameter of the volute sleeved at the tailgate.

7. The electric chain saw as in claim 1, wherein an air inlet window and an air outlet window are provided on the housing, the air inlet window and the air outlet window being provided on a same side of the housing.

8. The electric chain saw as in claim 7, wherein cooling fins are provided on the control board, the air flow into the housing through the air inlet window being at least partially through the channels between the cooling fins.

9. The electric chain saw as in claim 8, wherein the cooling fins are parallel to the air flow entering the air inlet window.

10. The electric chain saw as in claim 1, wherein a buffer block is provided outside the control board.