CN219465557U - Ultra Precision Machining Machine Tool - Google Patents

Abstract

The application discloses an ultra-precision machining tool. The ultra-precision machining machine tool comprises a machine body, a screw rod assembly, a driving motor and a damping block. The lathe bed is provided with a bearing seat; the screw rod assembly comprises a screw rod and a nut, both ends of the screw rod are rotatably arranged on the bearing seat through bearings, and the nut is rotatably sleeved on the screw rod; the driving motor comprises a machine body and a motor shaft arranged on the machine body, and the motor shaft is connected with the end part of the screw rod through a coupler; the damping block is arranged between the bearing seat and the machine body, a damping oil cavity is arranged on one side, close to the machine body, of the damping block, and an oil path channel communicated with the damping oil cavity is arranged on the damping block or the machine body. The ultra-precise machining machine tool can solve the problems of low positioning and machining precision of the ultra-precise machining machine tool in the prior art.

Description

Ultra-precision machining machine tools

technical field

The present application relates to the technical field of processing machine tools, in particular, to an ultra-precision processing machine tool.

Background technique

During the processing of ultra-precision machine tools, a transmission system with high precision and smooth operation is required. The screw nut mechanism can convert the rotary motion to the linear motion. It has good transmission stability, small frictional resistance, good sensitivity, no vibration when starting, no crawling at low speed, controllable micro-feed and high positioning accuracy, so it is often used as a super The transmission mechanism of each linear axis of a precision machine tool.

However, when the screw nut mechanism is driven by a servo motor, the running vibration of the motor often occurs and is transmitted to the screw. For ultra-precision machine tools, the vibration of the screw will lead to a decrease in the positioning accuracy of the machine tool, resulting in low machining accuracy of the workpiece. Therefore, there is an urgent need to design an ultra-precision machining machine tool that can prevent the vibration of the servo motor from being transmitted to the screw to improve the positioning and machining accuracy of the machine tool.

Utility model content

The main purpose of the present application is to provide an ultra-precision machining machine tool to at least solve the problems of low positioning and machining accuracy of the ultra-precision machining machine tool in the prior art.

According to an aspect of the embodiment of the present application, an ultra-precision machining machine tool is provided, including:

The bed, the bed is provided with a bearing seat;

A screw assembly, the screw assembly includes a screw and a nut, both ends of the screw are rotatably mounted on the bearing seat through bearings, and the nut is rotatably sleeved on the screw ;

A drive motor, the drive motor includes a fuselage and a motor shaft arranged on the fuselage, the motor shaft is connected to the end of the screw rod through a coupling;

A shock absorbing block, the shock absorbing block is arranged between the bearing seat and the fuselage, a shock absorbing oil chamber is arranged on the side of the shock absorbing block close to the fuselage, and the shock absorbing block or the An oil channel communicating with the shock absorbing oil chamber is arranged on the fuselage.

Further, the shock absorbing block is sheathed on the outer periphery of the motor shaft, the shock absorbing oil chamber is an annular shock absorbing oil chamber, and the annular shock absorbing oil chamber is arranged coaxially with the motor shaft.

Further, both the inner ring and the outer ring of the annular damping oil chamber are provided with sealing rings, and the sealing rings are arranged between the shock absorbing block and the fuselage to protect the annular damping oil chamber. seal.

Further, the annular damping oil chamber is an annular oil chamber, and two conduits are arranged at intervals in the annular oil chamber, and both conduits communicate with the oil channel.

Further, the ports of the conduits located in the annular damping oil chamber are inclined ports, and the inclined ports on the two conduits are inclined toward directions away from each other.

Further, the distance between the two conduits is no more than 1/4 of the circumference of the annular oil cavity.

Further, the oil passage is provided on the shock absorber, and the oil passage includes two, and the two oil passages communicate with the two conduits in a one-to-one correspondence.

Further, the shock absorbing block is provided with two three-way pipes, and the three-way pipes include a first interface, a second interface and a third interface, and the first interface of the first three-way pipe is connected to the One of the oil passages is connected, the first port of the second three-way pipe is connected with the other oil passage, the second port of the first three-way pipe is connected with the second The second interface of the three-way pipe is connected through the first pipeline, the third interface of the first three-way pipe is an oil inlet, and the third interface of the second three-way pipe For the oil outlet.

Further, an oil inlet pipe is provided at the third interface of the first three-way pipe, and the oil inlet pipe is thicker than the first pipe.

Further, the shock-absorbing block is locked on the fuselage through a locking member.

Compared with the prior art, the technical solution of the present application at least has the following technical effects:

When in use, the structure to be driven is fixedly connected to the nut. At this time, the drive motor rotates to drive the coupling and the screw to rotate, and then drives the nut and the structure connected with the nut to move linearly along the screw.

Since a shock absorbing block is arranged between the fuselage and the bearing seat of the drive motor in the present application, and the shock absorbing block is provided with a shock absorbing oil chamber on the side close to the fuselage, through the shock absorbing block or the fuselage The function of the oil channel can lead hydraulic oil into the shock absorbing oil chamber. When the drive motor is working, the hydraulic oil with a predetermined pressure in the shock absorber oil chamber generates damping, which can play a role in buffering and shock absorption, and can effectively absorb the vibration of the drive motor, thereby preventing the vibration of the drive motor At the same time, the hydraulic pressure in the shock-absorbing oil chamber can take away part of the heat generated by the operation of the drive motor, which can greatly improve the movement accuracy and processing accuracy of the ultra-precision machining machine tool.

Description of drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation to the application. In the attached picture:

Fig. 1 is a partial cross-sectional view of an ultra-precision machining machine tool disclosed in an embodiment of the present application;

Figure 2 is an enlarged view of the M area in Figure 1;

Fig. 3 is a three-dimensional structure diagram of the shock absorbing block disclosed in the embodiment of the present application;

Fig. 4 is the front view of the damping block disclosed in the embodiment of the present application;

Fig. 5 is a structural diagram of the catheter disclosed in the embodiment of the present application;

Figure 6 is a comparison diagram of the flow direction of the hydraulic oil after it enters the shock absorber oil chamber in different flow modes.

Wherein, the above-mentioned accompanying drawings include the following reference signs:

10. Lathe bed; 11. Bearing seat; 20. Screw assembly; 21. Screw; 22. Nut; 30. Driving motor; 31. Fuselage; 32. Motor shaft; 40. Damping block; 41. Damping Oil chamber; 42, conduit; 421, inclined port; 43, oil channel; 50, sealing ring; 60, tee pipe; 61, first interface; 62, second interface; 63, third interface; 70, the first A pipeline; 80, an oil inlet pipe; 90, a shaft coupling; 100, a bearing.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

The relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, techniques, methods, and devices should be considered part of the authorized description. In all examples shown and discussed herein, any specific values should be construed as illustrative only, and not as limiting. Therefore, other examples of the exemplary embodiment may have different values. It should be noted that like numerals and letters denote like items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.

Referring to FIGS. 1 to 5 , according to an embodiment of the present application, an ultra-precision machining machine tool is provided, which includes a bed 10 , a screw assembly 20 , a driving motor 30 and a shock absorber 40 .

Wherein, the bed 10 is provided with a bearing seat 11; the screw assembly 20 includes a screw 21 and a nut 22, both ends of the screw 21 are rotatably mounted on the bearing 11 through a bearing 100, and the nut 22 is rotatably set Set on the screw mandrel 21; the driving motor 30 includes a fuselage 31 and a motor shaft 32 arranged on the fuselage 31, the motor shaft 32 is connected with the end of the screw mandrel 21 through a shaft coupling 90; the damping block 40 is arranged on the bearing Between the seat 11 and the fuselage 31, the side of the shock absorbing block 40 close to the fuselage 31 is provided with a shock absorbing oil chamber 41, and the shock absorbing block 40 or the fuselage 31 is provided with an oil passage communicating with the shock absorbing oil chamber 41 Channel 43.

During use, the structure that needs to be driven is fixedly connected with the nut 22. At this time, the driving motor 30 rotates, which can drive the shaft coupling 90 and the screw mandrel 21 to rotate, and then can drive the nut 22 and the structure connected with the nut 22 to move along the screw mandrel. 21 do linear motion.

Since a shock absorber 40 is arranged between the fuselage 31 of the drive motor 30 in this embodiment and the bearing seat 11, and the shock absorber 40 is provided with a shock absorber oil chamber 41 near the side of the fuselage 31, by being arranged on The damping block 40 or the oil channel 43 on the fuselage 31 can feed hydraulic oil into the damping oil cavity 41 . When the drive motor 30 is working, the hydraulic oil with a predetermined pressure in the shock absorber oil chamber 41 can play a role of buffering and shock absorption, and can effectively absorb the vibration generated by the drive motor 30, thereby preventing the drive motor 30 from vibrating. The vibration is transmitted to the screw assembly 20, and at the same time, the hydraulic pressure in the damping oil chamber 41 can take away part of the heat generated by the operation of the drive motor 30, which can greatly improve the motion accuracy and machining accuracy of the ultra-precision machining machine tool.

Specifically, the drive motor 30 in this embodiment is a servo motor. The shock absorbing block 40 can be a cubic block structure, and can also be a cylinder or a rectangular parallelepiped block structure. The drawings in this embodiment show the situation when the shock absorbing block 40 is arranged in a rectangular parallelepiped block structure. During actual installation, the shock-absorbing block 40 can be locked on the body 31 through a locking member, so as to absorb the vibration of the driving motor 30 during operation. Optionally, the locking member may be a locking bolt, a locking screw or a locking pin, etc., as long as it is any other deformation method that can fix the shock absorber 40 on the fuselage 31, it is included in this application. within the scope of protection.

During actual installation, the shock absorber 40 is sleeved on the outer periphery of the motor shaft 32, and the shock absorber oil chamber 41 is an annular shock absorber oil chamber, which is coaxially arranged with the motor shaft 32. After 43 is fed into the hydraulic oil, the hydraulic oil can flow along the annular damping oil chamber to fill the damping oil chamber to generate a certain pressure, which has a damping effect, and can evenly absorb the vibration of the driving motor 30 when it is working, and can Effectively prevent the vibration of the drive motor 30 from being transmitted to the screw assembly 20 .

In order to prevent oil leakage in the annular damping oil chamber, the inner and outer rings of the annular damping oil chamber in this embodiment are provided with sealing rings 50, and the sealing rings 50 are arranged between the shock absorbing block 40 and the fuselage. 31 to seal the annular damping oil chamber, the structure is stable and reliable.

Further, the annular damping oil chamber is a circular oil chamber, and two conduits 42 are arranged at intervals in the circular oil chamber, and both conduits 42 are connected with the oil channel 43. The function of the conduit 42 can simultaneously feed hydraulic oil into the annular damping oil cavity, and the vibration absorption effect is better. The distance between the two conduits 42 is no more than 1/4 of the circumference of the annular oil cavity, which facilitates filling of hydraulic oil from the same side of the damping block 40 .

Referring to Fig. 3 to Fig. 5, the ports of the conduits 42 in this embodiment located in the annular shock absorbing oil chamber (damping oil chamber 41) are inclined ports 421, and the inclined ports 421 of the two conduits 42 are facing away from each other. The direction is tilted. In this way, when the oil enters the annular damping oil cavity from the two conduits 42, the oil is divided into two oils, and the two oils can flow in two different directions as much as possible, and can flow in the ring damping oil chamber. There is a certain pressure inside the shock oil chamber, which can play the role of buffering and damping. When the driving motor 30 is running, the vibration generated can be absorbed by the oil.

Optionally, in one embodiment, the oil passage 43 is arranged on the shock absorber 40, and the oil passage 43 includes two, and the two oil passages 43 communicate with the two conduits 42 one by one, The oil enters the annular damping oil cavity from the oil channel 43 and is divided into two oils. There is a certain pressure inside the annular damping oil cavity, which has a damping effect and can play the role of buffering and vibration reduction. The drive motor 30 During operation, the vibration generated can be absorbed by the oil.

Further, the shock absorbing block 40 is provided with two three-way pipes 60, the two three-way pipes 60 both include a first interface 61, a second interface 62 and a third interface 63, the first three-way pipe 60 of the first One port 61 communicates with one of the above two oil passages 43, the first port 61 of the second three-way pipe 60 communicates with the other oil passage 43, and the second port 62 of the first three-way pipe 60 communicates with the other oil passage 43. The second interface 62 of the second three-way pipe 60 communicates through the first pipeline 70, the third interface 63 of the first three-way pipe 60 is the oil inlet, and the third interface 63 of the second three-way pipe 60 is the outlet. oil port. An oil inlet pipe 80 is arranged at the third interface 63 of the first three-way pipe 60 , and the oil inlet pipe 80 is thicker than the first pipe 70 .

When working, the oil enters into the tee pipe 60 from the oil inlet pipe 80 on the first tee pipe 60, and then enters into the annular damping oil cavity from the two tee pipes 60 and then divides into two oils. There is a certain pressure inside the annular shock-absorbing oil chamber, and the damping can play a role in buffering and reducing vibration. When the driving motor 30 is running, the vibration generated can be absorbed by the oil. At the same time, since the oil inlet pipe 80 is thicker than the first pipe 70, there is a certain liquid resistance when the oil passes through the thinner first pipe 70, resulting in pressure loss, so the pressure of the oil inlet pipe 80 after entering the oil is slightly greater than that of the first pipe The oil inlet pressure is 70, so that the oil has a certain fluidity, which is convenient for maintaining the pressure inside the shock absorbing oil chamber 41. At the same time, the air inside the shock absorbing oil chamber 41 can be removed, and part of the heat of the driving motor 30 can also be taken away. Long, there is no problem of aging.

It can be understood that, in this embodiment, by setting the double-port oil inlet on the damping block 40:

As shown in Figure 6, compared with ① non-flowing liquid and ② oil in one side and oil out in the method of ③ two sides of the oil inlet, the pressure can be maintained in the shock absorber oil chamber 41, and the pressure is reduced when the force is applied. The rigidity of the oil in the shock oil chamber 41 is better than ① and ②, and has better damping performance.

The ultra-precision machining machine tool of the utility model adds a set of damping blocks in front of the driving motor, and absorbs the vibration generated when the driving motor is running through the hydraulic oil, avoiding the vibration from being transmitted to the driving screw, and taking away part of the heat generated by the running of the motor at the same time , can greatly improve the movement precision and processing precision of the ultra-precision machining machine tool, the method is simple and reliable, and can also be applied to other equipment sensitive to motor vibration.

For the convenience of description, spatially relative terms may be used here, such as "on ...", "over ...", "on the surface of ...", "above", etc., to describe The spatial positional relationship between one device or feature shown and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as "above" or "above" other devices or configurations would then be oriented "beneath" or "above" the other devices or configurations. under other devices or configurations". Thus, the exemplary term "above" can encompass both an orientation of "above" and "beneath". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing corresponding components. To limit the protection scope of this application.

The above are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (10)

1. An ultra-precision machining tool, comprising:

the device comprises a lathe bed (10), wherein a bearing seat (11) is arranged on the lathe bed (10);

the screw rod assembly (20), the screw rod assembly (20) comprises a screw rod (21) and a nut (22), both ends of the screw rod (21) are rotatably mounted on the bearing seat (11) through bearings (100), and the nut (22) is rotatably sleeved on the screw rod (21);

the driving motor (30), the driving motor (30) comprises a machine body (31) and a motor shaft (32) arranged on the machine body (31), and the motor shaft (32) is connected with the end part of the screw rod (21) through a coupler (90);

damping block (40), damping block (40) set up bearing frame (11) with between fuselage (31), damping block (40) are close to one side of fuselage (31) is provided with shock attenuation oil pocket (41), damping block (40) or be provided with on fuselage (31) with oil circuit passageway (43) of shock attenuation oil pocket (41) intercommunication.

2. The ultra-precise machining tool according to claim 1, wherein the damper block (40) is sleeved on the periphery of the motor shaft (32), the damper oil chamber (41) is an annular damper oil chamber, and the annular damper oil chamber is coaxially arranged with the motor shaft (32).

3. The ultra-precise machining tool according to claim 2, wherein both an inner ring and an outer ring of the annular damper oil chamber are provided with seal rings (50), and the seal rings (50) are disposed between the damper block (40) and the machine body (31) to seal the annular damper oil chamber (41).

4. The ultra-precise machining tool according to claim 2, wherein the annular damping oil cavity is an annular oil cavity, two guide pipes (42) are arranged in the annular oil cavity at intervals, and the two guide pipes (42) are communicated with the oil path channel (43).

5. The ultra-precision machining tool according to claim 4, characterized in that the ports of the ducts (42) located in the annular damping oil chambers are inclined ports (421), and the inclined ports (421) on both the ducts (42) are inclined in directions facing away from each other.

6. The machine tool according to claim 4, wherein a separation distance between two of the guide pipes (42) is not more than 1/4 of a circumference of the annular oil chamber.

7. The ultra-precise machining tool according to claim 4, wherein the oil passage (43) is provided on the damper block (40), the oil passage (43) includes two oil passages (43) which communicate with the two guide pipes (42) in one-to-one correspondence.

8. The ultra-precise machining tool according to claim 7, wherein two three-way pipes (60) are arranged on the damping block (40), the three-way pipes (60) comprise a first interface (61), a second interface (62) and a third interface (63), the first interface (61) of the first three-way pipe (60) is communicated with one oil-way channel (43), the first interface (61) of the second three-way pipe (60) is communicated with the other oil-way channel (43), the second interface (62) of the first three-way pipe (60) is communicated with the second interface (62) of the second three-way pipe (60) through a first pipeline (70), the third interface (63) of the first three-way pipe (60) is an oil inlet, and the third interface (63) of the second three-way pipe (60) is an oil outlet.

9. The ultra-precise machining tool according to claim 8, characterized in that an oil inlet pipe (80) is provided at the third interface (63) of the first three-way pipe (60), the oil inlet pipe (80) being thicker than the first pipe (70).

10. Ultra-precision machining tool according to any one of claims 1 to 9, characterized in that the shock-absorbing block (40) is locked to the fuselage (31) by means of a locking element.