CN215257672U - Transmission mechanism of ball screw pair - Google Patents
Transmission mechanism of ball screw pair Download PDFInfo
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- CN215257672U CN215257672U CN202121379593.9U CN202121379593U CN215257672U CN 215257672 U CN215257672 U CN 215257672U CN 202121379593 U CN202121379593 U CN 202121379593U CN 215257672 U CN215257672 U CN 215257672U
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Abstract
The utility model provides a transmission mechanism of a ball screw pair, which comprises the ball screw pair, a left side base, a right side base, an elastic coupling, a motor, a left side bearing sleeve and a left side supporting component which are arranged at the left end of the ball screw pair, and a right side bearing sleeve and a right side supporting component which are arranged at the right end of the ball screw pair, wherein the ball screw pair comprises a screw rod and a screw nut on the screw rod; the left side bearing housing and the right side bearing housing are fixed in on left side base and the right side base respectively, both ends pass left side bearing housing and right side bearing housing respectively about the lead screw, form axial fixity support through left side supporting component between the left end of lead screw and the left side bearing housing, form axial floating support through right side supporting component between the right-hand member of lead screw and the right side bearing housing, and the right-hand member of lead screw passes through elastic coupling and motor and connects. The utility model discloses can show the influence that reduces the heat altered shape that the vice motion of ball produced to the machine tool machining precision.
Description
Technical Field
The utility model belongs to the technical field of ball, concretely relates to vice drive mechanism of ball.
Background
In a numerical control machine tool, a ball screw pair is generally used to control the movement of a moving part, in the prior art, a bearing fixing mode at two ends of the ball screw pair is generally that one end of the ball screw connected with a motor adopts an axial fixing supporting mode, and one end of the ball screw connected with a non-motor is generally an axial fixing, axial floating supporting mode or a free end. When one end of the ball screw pair, which is not connected with the motor, adopts an axial floating or free end, the thermal deformation displacement of the ball screw pair, which is generated by the rotary motion, can extend to one end of the non-motor; when the two ends are fixed axially, the displacement of thermal deformation can be blocked, and certain internal stress can be generated in the screw rod. Therefore, a transmission structure of the ball screw assembly needs to be designed to ensure that the position of the non-motor end does not change due to thermal deformation displacement, so that the influence of the thermal deformation of the screw on the machining precision of a machine tool is reduced.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the present invention provides a transmission mechanism of a ball screw assembly, so that the thermal deformation displacement generated in the screw rotation motion can be extended to one end of a motor, thereby ensuring that one end position of a non-motor does not change due to the thermal deformation displacement.
The technical scheme of the utility model as follows: the utility model provides a vice drive mechanism of ball, includes ball vice, left side base, right side base, resilient coupling and motor, and locates the left side bearing housing and the left side supporting component of ball vice left end, and locate the right side bearing housing and the right side supporting component of ball vice right-hand member, ball is vice including lead screw and screw nut, lead screw and screw nut threaded connection, wherein:
the left bearing sleeve and the right bearing sleeve are respectively fixed on the left base and the right base, and the left end and the right end of the screw rod respectively penetrate through the left bearing sleeve and the right bearing sleeve;
the left side supporting assembly is arranged between the left side bearing sleeve and the lead screw, and an axial fixed support is formed between the left end of the lead screw and the left side bearing sleeve through the left side supporting assembly; the right support assembly is arranged between the right bearing sleeve and the lead screw, and axial floating support is formed between the right end of the lead screw and the right bearing sleeve through the right support assembly;
the right end of the lead screw is horizontally connected with the elastic coupling, the other end of the elastic coupling is fixedly connected with an output shaft of the motor, and the motor drives the ball screw pair to move through the elastic coupling.
Further, the left side supporting component comprises a left side locking nut, a left side washer and a left side ball bearing which are sequentially contacted and sleeved from left to right, wherein:
the inner side wall and the outer side wall of the left side ball bearing are in clearance fit with the outer side wall of the lead screw and the inner side wall of the left side bearing sleeve respectively;
a first boss extends inwards from the inner side wall of the left bearing sleeve on the right side of the left ball bearing, an end cover is further fixed at the left end of the left bearing sleeve, and the right end of the end cover is sleeved on the inner side wall of the left bearing sleeve; two ends of the outer ring of the left ball bearing are clamped between the end cover and the first boss, and the right end of the end cover sleeved on the inner side wall of the left bearing sleeve abuts against the outer ring of the left ball bearing; and the left gasket is abutted to the inner ring of the left ball bearing.
Further, the right side supporting component comprises a right side lock nut, a right side washer and a right side ball bearing which are sequentially contacted and sleeved from right to left on the outer side wall of the lead screw, wherein:
the inner side wall and the outer side wall of the right side ball bearing are in clearance fit with the outer side wall of the lead screw and the inner side wall of the right side bearing sleeve respectively;
a second boss extends inwards from the inner side wall of the right bearing sleeve positioned on the left side of the right ball bearing, the left end of the outer ring of the right ball bearing is abutted against the second boss, and a gap is reserved between the right end of the outer ring of the right ball bearing and the right gasket; the right side gasket is abutted against the right end of the inner ring of the right side ball bearing.
Further, open the horizontal through-hole of first level and the horizontal through-hole of second that have left right direction on left side base and the right side base respectively, the right-hand member of left side bearing housing stretches into extremely in the first level through-hole, the left end of right side bearing housing stretches into extremely in the horizontal through-hole of second to use the mounting will left side bearing housing and right side bearing housing are fixed in respectively on left side base and the right side base.
Furthermore, a first annular groove and a second annular groove are formed in the inner side wall of the right end of the left bearing sleeve and the inner side wall of the left end of the right bearing sleeve respectively, and a first sealing ring and a second sealing ring are mounted in the first annular groove and the second annular groove respectively.
Further, the right side tip of left side bearing housing with the left side tip of right side bearing housing still is equipped with first snubber block and second snubber block respectively, first snubber block and second snubber block are fixed in respectively on left side base and the right side base, just the inside wall of first snubber block and second snubber block extremely the vertical distance of lead screw is less than the lead screw nut lateral wall extremely the vertical distance of lead screw.
Further, still be equipped with the motor mounting panel between elastic coupling and the motor, motor fixed mounting is in on the motor mounting panel, just it has the confession to open on the motor mounting panel the horizontal shaft hole that the output shaft of motor passed, the output shaft passes horizontal shaft hole with shaft coupling fixed connection.
Furthermore, a horizontal workbench is arranged above the ball screw pair, an adjusting gasket is fixed at the bottom of the workbench, a screw nut seat is fixed at the bottom of the adjusting gasket, and the screw nut seat is fixedly connected with the screw nut below the screw nut seat.
The utility model discloses prior art compares has following beneficial effect: ball vice drive mechanism, the one end through connecting ball vice non-motor adopts bearing axial fixity to support, the one end of connecting the motor adopts bearing axial floating support to carry out fixed connection through resilient coupling and motor, thereby digest the absorption with the thermal deformation displacement that ball vice motion produced, with the internal stress that the elimination ball is vice because of the temperature rise produces, thereby further reduce the influence of ball vice thermal deformation to machine tool machining precision.
Drawings
Fig. 1 is a schematic structural diagram of the ball screw assembly of the present invention.
Wherein: 1. the device comprises a left base, a right base, a left bearing sleeve, a right bearing sleeve, a left base, a right bearing sleeve, a left bearing sleeve, a right bearing sleeve, a left elastic coupling, a right elastic coupling, a motor, a right elastic coupling, a left elastic base, a left elastic coupling, a left bearing, a left elastic coupling, a left base, a left elastic coupling, a left bearing, a left base, a left bearing; 18. a first boss 19, a second boss; 20. an output shaft;
100. a ball screw pair 110, a screw rod 120 and a screw nut;
200. a left support component 210, a left lock nut 220, a left washer 230, a left ball bearing 240 and an end cover;
300. right side support assembly, 310, right side lock nut, 320, right side washer, 330, right side ball bearing.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the scope of the present invention.
As shown in fig. 1, the utility model provides a ball screw pair's drive mechanism, including ball screw pair 100, left side base 1, right side base 2, elastic coupling 5 and motor 6, and locate the left side bearing housing 3 and the left side supporting component 200 of ball screw pair 100 left end, and the right side bearing housing 4 and the right side supporting component 300 of locating ball screw pair 100 right-hand member, ball screw pair 100 includes lead screw 110 and the lead screw nut 120 of locating on lead screw 110, lead screw nut 120 and lead screw 110 threaded connection, wherein:
the left bearing sleeve 3 and the right bearing sleeve 4 are respectively fixed on the left base 1 and the right base 2, and the left end and the right end of the lead screw 110 respectively penetrate through the left bearing sleeve 3 and the right bearing sleeve 4;
the left supporting component 200 is arranged between the left bearing sleeve 3 and the lead screw 110, and an axial fixed support is formed between the left end of the lead screw 110 and the left bearing sleeve 3 through the left supporting component 200; the right supporting component 300 is arranged between the right bearing sleeve 4 and the lead screw 110, and axial floating support is formed between the right end of the lead screw 110 and the right bearing sleeve 4 through the right supporting component 300;
the right end of the screw rod 110 is horizontally connected with the elastic coupling 5, and the other end of the elastic coupling 5 is fixedly connected with the output shaft 20 of the motor 6. The motor 6 drives the lead screw 110 to rotate through the elastic coupling 5, and drives the lead screw nut 120 to move left and right on the lead screw 110.
The left base 1 and the right base 2 are fixed to a machine tool.
Further, the left supporting assembly 200 includes a left locking nut 210, a left washer 220 and a left ball bearing 230, which sequentially contact and are sleeved on the outer side wall of the lead screw 110 from left to right, wherein:
the inner side wall and the outer side wall of the left side ball bearing 230 are in clearance fit with the outer side wall of the lead screw 110 and the inner side wall of the left side bearing sleeve 3 respectively;
a first boss 18 extends inwards from the inner side wall of the left bearing sleeve 3 on the right side of the left ball bearing 230, an end cover 240 is further fixed at the left end of the left bearing sleeve 3, and the right end of the end cover 240 is sleeved on the inner side wall of the left bearing sleeve 3; the two ends of the outer ring of the left ball bearing 230 are clamped between the end cover 240 and the first boss 18, the right end of the end cover 240 sleeved on the inner side wall of the left bearing sleeve 3 abuts against the outer ring of the left ball bearing 230, and the outer ring of the left ball bearing 230 is pressed tightly; the left washer 220 abuts against the inner ring of the left ball bearing 230, and the inner ring of the left ball bearing 230 is pressed under the action of the left lock nut 210.
The inner ring and the outer ring of the left ball bearing 230 are compressed under the action of the left lock nut 210 and the end cover 240, respectively, so as to form an axial fixed support for the ball bearing at the left end of the lead screw 110.
Further, the right supporting assembly 300 includes a right lock nut 310, a right washer 320 and a right ball bearing 330 which sequentially contact and are sleeved on the outer side wall of the lead screw 110 from right to left, wherein:
the inner side wall and the outer side wall of the right side ball bearing 330 are in clearance fit with the outer side wall of the lead screw 110 and the inner side wall of the right side bearing sleeve 4 respectively;
a second boss 19 extends inwards from the inner side wall of the right bearing sleeve 4 positioned at the left side of the right ball bearing 330, the left end of the outer ring of the right ball bearing 330 abuts against the second boss 19, and a gap 16 is formed between the right end of the outer ring of the right ball bearing 330 and the right washer 320; the right washer 320 abuts against the right end of the inner ring of the right ball bearing 330, and the right ball bearing 330 is pressed tightly under the action of the right lock nut 310.
Therefore, the inner race of the right ball bearing 330 is compressed by the right lock nut 310, while the outer race of the right ball bearing 330 is not compressed, so that the ball bearing forming the right end of the lead screw 110 is axially floating supported.
In the transmission mechanism of the ball screw assembly 100 in this embodiment, one end of the screw 110 connected to the non-motor 6 is axially fixed and supported by a bearing, and one end of the screw connected to the motor 6 is axially floating and supported by a bearing, so that when the ball screw assembly 100 moves, thermal deformation displacement generated inside the ball screw assembly can extend to one end of the screw 110 connected to the motor 6; meanwhile, the motor 6 is connected with the screw 110 through the elastic coupling 5, so that thermal deformation displacement can be digested and absorbed through deformation of the elastic coupling 5, internal stress generated in the screw 110 is eliminated, and the influence of thermal deformation of a ball screw pair on the machining precision of a machine tool is further eliminated.
Further, open first horizontal through-hole 7 and the horizontal through-hole 8 of second of left right direction respectively on left side base 1 and the right side base 2, the cover is located the lead screw 110 outside the right-hand member of left side bearing housing 3 stretch into to in the first horizontal through-hole 7, the left end of right side bearing housing 4 stretch into to in the horizontal through-hole 8 of second to through using the mounting, for example bolt and nut sub-assembly, will left side bearing housing 3 and right side bearing housing 4 are fixed in respectively on left side base 1 and the right side base 2.
Further, a first annular groove and a second annular groove are respectively formed in the inner side wall of the right end of the left bearing sleeve 3 and the inner side wall of the left end of the right bearing sleeve 4, and a first sealing ring 9 and a second sealing ring 10 are respectively installed in the first annular groove and the second annular groove to prevent dust from entering the inside of the bearing.
Further, the right end of the left bearing sleeve 3 and the left end of the right bearing sleeve 4 are further provided with a first damping block 11 and a second damping block 12 respectively, the first damping block 11 and the second damping block 12 are fixed on the left base 1 and the right base 2 respectively, and the vertical distance from the inner side wall of the first damping block 11 and the inner side wall of the second damping block 12 to the lead screw 110 is smaller than the vertical distance from the outer side wall of the lead screw nut 120 to the lead screw 110. When the workbench causes the lead screw nut 120 to move over the stroke due to a fault, the shock absorption block can reduce the impact of the shock absorption block on the machine tool.
Further, the elastic coupling 5 with still be equipped with motor mounting panel 17 between the motor 6, motor 6 fixed mounting is in on the motor mounting panel 17, it has the confession to open on the motor mounting panel 17 the horizontal shaft hole (not shown in the figure) that the output shaft 20 of motor 6 passed, output shaft 20 pass horizontal shaft hole with shaft coupling fixed connection.
According to the utility model discloses, the top of ball screw pair 100 is equipped with the horizontal table 15 of lathe, the bottom of workstation 15 is fixed with adjusting shim 14, adjusting shim 14's bottom is fixed with lead screw nut seat 13, lead screw nut seat 13 and the lead screw nut 120 fixed connection of its below. Thus, when the screw 110 is rotated by the motor 6, the screw nut 120 moves left and right on the screw 110, and the machine table 15 above the screw is moved.
The above is to the detailed description of the transmission mechanism of the ball screw pair provided by the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (8)
1. A transmission mechanism of a ball screw pair comprises the ball screw pair, a left base, a right base, an elastic coupling and a motor, a left bearing sleeve and a left supporting component which are arranged at the left end of the ball screw pair, and a right bearing sleeve and a right supporting component which are arranged at the right end of the ball screw pair, wherein the ball screw pair comprises a screw rod and a screw nut which are connected by screw threads,
the left bearing sleeve and the right bearing sleeve are respectively fixed on the left base and the right base, and the left end and the right end of the screw rod respectively penetrate through the left bearing sleeve and the right bearing sleeve;
the left side supporting assembly is arranged between the left side bearing sleeve and the lead screw, and an axial fixed support is formed between the left end of the lead screw and the left side bearing sleeve through the left side supporting assembly; the right support assembly is arranged between the right bearing sleeve and the lead screw, and axial floating support is formed between the right end of the lead screw and the right bearing sleeve through the right support assembly;
the right end of the lead screw is horizontally connected with the elastic coupling, the other end of the elastic coupling is fixedly connected with an output shaft of the motor, and the motor drives the ball screw pair to move through the elastic coupling.
2. The transmission mechanism of the ball screw assembly according to claim 1, wherein the left supporting assembly comprises a left lock nut, a left washer and a left ball bearing which are sequentially contacted from left to right and sleeved on the outer side wall of the screw, wherein:
the inner side wall and the outer side wall of the left side ball bearing are in clearance fit with the outer side wall of the lead screw and the inner side wall of the left side bearing sleeve respectively;
a first boss extends inwards from the inner side wall of the left bearing sleeve on the right side of the left ball bearing, an end cover is further fixed at the left end of the left bearing sleeve, and the right end of the end cover is sleeved on the inner side wall of the left bearing sleeve; two ends of the outer ring of the left ball bearing are clamped between the end cover and the first boss, and the right end of the end cover sleeved on the inner side wall of the left bearing sleeve abuts against the outer ring of the left ball bearing; and the left gasket is abutted to the inner ring of the left ball bearing.
3. The transmission mechanism of the ball screw pair according to claim 1, wherein the right supporting component comprises a right lock nut, a right washer and a right ball bearing which are sequentially contacted from right to left and sleeved on the outer side wall of the screw, wherein:
the inner side wall and the outer side wall of the right side ball bearing are in clearance fit with the outer side wall of the lead screw and the inner side wall of the right side bearing sleeve respectively;
a second boss extends inwards from the inner side wall of the right bearing sleeve positioned on the left side of the right ball bearing, the left end of the outer ring of the right ball bearing is abutted against the second boss, and a gap is reserved between the right end of the outer ring of the right ball bearing and the right gasket; the right side gasket is abutted against the right end of the inner ring of the right side ball bearing.
4. The ball screw pair transmission mechanism according to claim 1, wherein the left base and the right base are respectively provided with a first horizontal through hole and a second horizontal through hole in the left-right direction, the right end of the left bearing sleeve extends into the first horizontal through hole, the left end of the right bearing sleeve extends into the second horizontal through hole, and the left bearing sleeve and the right bearing sleeve are respectively fixed on the left base and the right base by fixing members.
5. The ball screw pair transmission mechanism according to claim 1, wherein a first annular groove and a second annular groove are respectively formed in the inner side wall of the right end of the left bearing sleeve and the inner side wall of the left end of the right bearing sleeve, and a first sealing ring and a second sealing ring are respectively mounted in the first annular groove and the second annular groove.
6. The ball screw pair transmission mechanism according to claim 1, wherein the right end of the left bearing housing and the left end of the right bearing housing are further provided with a first damping block and a second damping block respectively, the first damping block and the second damping block are fixed on the left base and the right base respectively, and the vertical distance from the inner side wall of the first damping block and the inner side wall of the second damping block to the screw is smaller than the vertical distance from the outer side wall of the screw nut to the screw.
7. The ball screw pair transmission mechanism according to claim 1, wherein a motor mounting plate is further disposed between the elastic coupling and the motor, the motor is fixedly mounted on the motor mounting plate, a horizontal shaft hole for an output shaft of the motor to pass through is formed in the motor mounting plate, and the output shaft passes through the horizontal shaft hole and is fixedly connected with the coupling.
8. The ball screw assembly transmission mechanism according to claim 1, wherein a horizontal table is provided above the ball screw assembly, an adjusting shim is fixed to a bottom of the table, a screw nut seat is fixed to a bottom of the adjusting shim, and the screw nut seat is fixedly connected to the screw nut below the screw nut seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121379593.9U CN215257672U (en) | 2021-06-16 | 2021-06-16 | Transmission mechanism of ball screw pair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121379593.9U CN215257672U (en) | 2021-06-16 | 2021-06-16 | Transmission mechanism of ball screw pair |
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| Publication Number | Publication Date |
|---|---|
| CN215257672U true CN215257672U (en) | 2021-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121379593.9U Active CN215257672U (en) | 2021-06-16 | 2021-06-16 | Transmission mechanism of ball screw pair |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508858A (en) * | 2022-02-22 | 2022-05-17 | 杭州老板电器股份有限公司 | Ignition needle assembly, gas water heater and control method of gas water heater |
-
2021
- 2021-06-16 CN CN202121379593.9U patent/CN215257672U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508858A (en) * | 2022-02-22 | 2022-05-17 | 杭州老板电器股份有限公司 | Ignition needle assembly, gas water heater and control method of gas water heater |
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