CN220839144U - Novel adjustable prestretching ball screw transmission device - Google Patents
Novel adjustable prestretching ball screw transmission device Download PDFInfo
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- CN220839144U CN220839144U CN202322715627.2U CN202322715627U CN220839144U CN 220839144 U CN220839144 U CN 220839144U CN 202322715627 U CN202322715627 U CN 202322715627U CN 220839144 U CN220839144 U CN 220839144U
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 22
- 238000009434 installation Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000004075 alteration Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 230000005484 gravity Effects 0.000 description 1
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Abstract
The utility model relates to a novel adjustable prestretching ball screw transmission device. The device comprises a cross beam, a sliding plate sliding on the cross beam, a ball screw for driving the sliding plate to slide, a front bearing seat assembly for supporting the ball screw, a rear bearing seat assembly arranged on the cross beam and a driving device for driving the ball screw to rotate; the front bearing seat assembly is arranged on the cross beam; the sliding plate is arranged on the ball screw; the two ends of the ball screw are respectively and rotatably connected with the front bearing seat assembly and the rear bearing seat assembly; the driving device is arranged on the front bearing seat assembly, and meanwhile, the driving end of the driving device is in transmission connection with the ball screw. The ball screw mounting method solves the technical problems that in the prior art, the mounting mode of the ball screw is difficult, and meanwhile, when the length of the screw changes due to the change of the ambient temperature, the stress of bearings at two ends can be influenced, and when the temperature changes greatly, the bearings can be blocked even.
Description
Technical Field
The utility model relates to the field of ball screws, in particular to a novel adjustable pre-stretching ball screw transmission device.
Background
Ball screws are ideal products for converting rotary motion to linear motion, or vice versa. The ball screw is a transmission element most commonly used in tool machines and precision machines, and has a main function of converting rotary motion into linear motion or converting torque into axial repeated acting force, and is widely applied to various industrial equipment and precision instruments due to small friction resistance.
There are several ways to install ball screw, such as the following: 1. one end is fixed, and the other end is free; 2. the two ends are fixed; 3. one end is fixed, and the other end is fixed after being loaded with pre-tightening. The disadvantage of these structures is: 1. one end is fixed, and the other end is free and mainly used for shorter screw transmission, and the influence of the sagging of the screw due to gravity on the precision of the machine tool is not considered, so that the device is not suitable for longer screw installation. 2. The fixed mode installation of comparing 1 st at both ends is more difficult, and the lead screw is because of the change length of ambient temperature when changing simultaneously, and the atress of both ends bearing can take place the influence, even takes place the dead phenomenon of bearing card when temperature variation is great.
Disclosure of utility model
The embodiment of the application solves the technical problems that the installation mode of the ball screw is difficult in the prior art, the stress of bearings at two ends can be influenced when the length of the screw changes due to the change of the ambient temperature, and even the bearings are blocked when the temperature change is large.
The technical scheme adopted by the embodiment of the application is as follows:
The novel adjustable prestretching ball screw transmission device comprises a cross beam, a sliding plate sliding on the cross beam, a ball screw used for driving the sliding plate to slide, a front bearing seat assembly used for supporting the ball screw, a rear bearing seat assembly arranged on the cross beam and a driving device used for driving the ball screw to rotate; the front bearing seat assembly is arranged on the cross beam; the sliding plate is arranged on the ball screw; the two ends of the ball screw are respectively and rotatably connected with the front bearing seat assembly and the rear bearing seat assembly; the driving device is arranged on the front bearing seat assembly, and meanwhile, the driving end of the driving device is in transmission connection with the ball screw.
The further technical scheme is as follows: the front bearing seat assembly comprises a front bearing seat, a bottom plate arranged on the cross beam, a first bearing used for supporting the front end of the ball screw, a first end cover used for limiting the first bearing, a connecting sleeve arranged on the front bearing seat and an adjusting screw used for propping against the bottom plate; the front bearing seat is arranged on the bottom plate; the first bearing is arranged in the inner hole of the front bearing seat; the first end cap is mounted on the front bearing seat; the driving device is connected to the connecting sleeve; the adjusting screw is in threaded connection with the front bearing seat; the front end of the ball screw sequentially passes through the bottom plate and the front bearing seat and is connected with the first bearing inner ring; the driving end of the driving device penetrates through the connecting sleeve and is in transmission connection with the ball screw.
The further technical scheme is as follows: the rear bearing seat assembly comprises a rear bearing seat, a second bearing used for supporting the rear end of the ball screw and a second end cover used for limiting the second bearing; the rear bearing seat is arranged on the cross beam; the second bearing is arranged in the inner hole of the rear bearing seat; the second end cover is arranged on the rear bearing seat; the rear end of the ball screw penetrates through the rear bearing seat and is connected with the second bearing inner ring.
One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:
1. Due to the adoption of the arrangement of the cross beam, the sliding plate, the ball screw, the front bearing seat assembly, the rear bearing seat assembly and the driving device, the ball screw can be driven to rotate through the rotation of the driving end of the driving device, and then the sliding plate can be driven to slide on the cross beam. Because ball left end swivelling joint in the front bearing frame subassembly, ball right-hand member swivelling joint in the back bearing frame subassembly, ball right-hand member is the stiff end simultaneously, therefore through adjusting the screw on the front bearing frame subassembly when tensile ball, adjust the lead screw tensile volume according to the lead screw length, can eliminate the deflection that lead screw clearance and temperature variation arouse after the lead screw is prestretched to obviously improve the positioning accuracy of lead screw and satisfy the lathe processing high accuracy requirement. The whole device has simple and reliable structure, lower processing and manufacturing cost and easier implementation, thus prolonging the service life of the device to a certain extent.
2. Because the front bearing seat, the bottom plate, the first bearing, the first end cover, the connecting sleeve and the adjusting screw are adopted, the front end of the ball screw sequentially penetrates through the bottom plate and the front bearing seat and is fixedly connected to the inner ring of the first bearing, and meanwhile, the driving end of the driving device penetrates through the connecting sleeve and is in transmission connection with the ball screw, and therefore the driving end of the driving device rotates to drive the ball screw to normally operate. When the ball screw is required to be stretched, the end part of the adjusting screw is tightly propped against the side surface of the bottom plate by rotating the adjusting screw, the stretching amount of the screw is adjusted according to the length of the screw, and the deformation caused by the clearance and temperature change of the screw can be eliminated after the screw is pre-stretched, so that the positioning precision of the screw is obviously improved to meet the high-precision requirement of machine tool processing.
3. Due to the arrangement of the rear bearing seat, the second bearing and the second end cover, when the driving device drives the ball screw to rotate, the ball screw can be ensured to normally rotate because the rear end of the ball screw is fixedly connected with the inner ring of the second bearing. The rear bearing seat is fixed on the beam mounting surface through the screw and the locating pin, so that the whole structure is firmer.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a novel adjustable pretensioning ball screw transmission device in an embodiment of the utility model.
Fig. 2 is a cross-sectional view of the whole structure of a novel adjustable pretensioned ball screw transmission device in an embodiment of the utility model.
Fig. 3 is a schematic view of a part of a structure for embodying a front bearing housing assembly according to an embodiment of the present utility model.
Fig. 4 is a schematic view of a part of a structure for embodying a rear bearing housing assembly according to an embodiment of the present utility model.
In the figure: 1. a cross beam; 2. a slide plate; 3. a ball screw; 4. a front bearing block assembly; 41. a front bearing seat; 42. a bottom plate; 43. a first bearing; 44. a first end cap; 45. connecting sleeves; 46. an adjusting screw; 5. a rear bearing housing assembly; 51. a rear bearing seat; 52. a second bearing; 53. a second end cap; 6. a driving device.
Detailed Description
The embodiment of the application solves the technical problems that the installation mode of the ball screw is difficult in the prior art, the stress of bearings at two ends can be influenced when the length of the screw changes due to the change of the ambient temperature, and even the bearings are blocked when the temperature change is large.
The technical scheme in the embodiment of the application aims to solve the problems, and the overall thought is as follows:
in order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
The novel adjustable prestretching ball screw transmission device comprises a cross beam 1, a sliding plate 2 sliding on the cross beam 1, a ball screw 3 for driving the sliding plate 2 to slide, a front bearing seat assembly 4 for supporting the ball screw 3, a rear bearing seat assembly 5 arranged on the cross beam 1 and a driving device 6 for driving the ball screw 3 to rotate, as shown in fig. 1 and 2. The front bearing block assembly 4 is mounted on the cross beam 1. The slide plate 2 is provided on the ball screw 3. The two ends of the ball screw 3 are respectively and rotatably connected with the front bearing seat assembly 4 and the rear bearing seat assembly 5. The driving device 6 is arranged on the front bearing seat assembly 4, and meanwhile, the driving end of the driving device 6 is in transmission connection with the ball screw 3.
Three groups of sliding blocks which are arranged at 90 degrees are fixedly arranged on the sliding plate 2, adaptive sliding rails are fixedly arranged at positions, corresponding to the three groups of sliding blocks, on the cross beam 1, and the sliding plate 2 slides on the sliding rails arranged on the cross beam 1 through the sliding blocks. The nut on the ball screw 3 is fixed on the side plane of the slide plate 2. The front bearing seat component 4 is fixedly arranged at the left end of the cross beam 1. The rear bearing seat component 5 is fixedly arranged at the right end of the cross beam 1. The left end of the ball screw 3 is rotatably connected to the front bearing housing assembly 4. The right end of the ball screw 3 is rotatably connected to the rear bearing housing assembly 5. The drive means 6 are preferably servomotors. The driving device 6 is fixedly arranged on the front bearing seat assembly 4, and meanwhile, the driving end of the driving device 6 penetrates through the front bearing seat assembly 4 and is in transmission connection with the ball screw 3.
Through the setting of crossbeam 1, slide 2, ball 3, front bearing frame subassembly 4, back bearing frame subassembly 5 and drive arrangement 6, through the rotation of drive arrangement 6 drive end can drive ball 3 rotation, and then can drive slide 2 to slide on crossbeam 1. Because ball 3 left end swivelling joint is in front bearing frame subassembly 4, ball 3 right-hand member swivelling joint is in back bearing frame subassembly 5, and ball 3 right-hand member is the stiff end simultaneously, therefore through adjusting the screw on the front bearing frame subassembly 4 when stretching ball 3, adjust the lead screw stretching amount according to the lead screw length, can eliminate the deflection that lead screw clearance and temperature variation arouse after the lead screw is prestretched to obviously improve the positioning accuracy of lead screw and satisfy the lathe processing high accuracy requirement. The whole device has simple and reliable structure, lower processing and manufacturing cost and easier implementation, thus prolonging the service life of the device to a certain extent.
As shown in fig. 3, the front bearing housing assembly 4 includes a front bearing housing 41, a bottom plate 42 mounted on the cross member 1, a first bearing 43 for supporting the front end of the ball screw 3, a first end cover 44 for limiting the first bearing 43, a connecting sleeve 45 mounted on the front bearing housing 41, and an adjusting screw 46 for pressing against the bottom plate 42. The front bearing housing 41 is mounted on the bottom plate 42. The first bearing 43 is mounted in the inner bore of the front bearing housing 41. The first end cap 44 is mounted on the front bearing housing 41. The drive means 6 are connected to a connecting sleeve 45. An adjusting screw 46 is screwed to the front bearing housing 41. The front end of the ball screw 3 sequentially passes through the bottom plate 42 and the front bearing block 41, and is connected to the inner ring of the first bearing 43. The driving end of the driving device 6 passes through the connecting sleeve 45 and is in transmission connection with the ball screw 3.
The bottom plate 42 is detachably and fixedly arranged on the left side of the cross beam 1 through bolts. The middle positioning hole of the bottom plate 42 is coaxial with the center of the ball screw 3. The front bearing housing 41 is detachably and fixedly mounted on the bottom plate 42 by bolts. The first bearing 43 is embedded in the inner hole of the front bearing seat 41, and meanwhile, the outer ring of the first bearing 43 is fixedly connected with the front bearing seat 41. The first end cap 44 is fixedly mounted on the front bearing housing 41 by means of a lock nut. The connecting sleeve 45 is fixedly mounted on the front bearing housing 41 by bolts. The drive means 6 are fixedly connected to the connecting sleeve 45. The adjusting screw 46 is screwed onto the front bearing housing 41, while the end of the adjusting screw 46 abuts against the bottom plate 42. The front end of the ball screw 3 sequentially passes through the bottom plate 42 and the front bearing block 41 and is fixedly connected to the inner ring of the first bearing 43.
Through the arrangement of the front bearing seat 41, the bottom plate 42, the first bearing 43, the first end cover 44, the connecting sleeve 45 and the adjusting screw 46, the front end of the ball screw 3 sequentially passes through the bottom plate 42 and the front bearing seat 41 and is fixedly connected to the inner ring of the first bearing 43, and meanwhile, the driving end of the driving device 6 passes through the connecting sleeve 45 and is in transmission connection with the ball screw 3, so that the driving end of the driving device 6 rotates to drive the ball screw 3 to normally operate. When the ball screw 3 is required to be stretched, the stretching amount of the screw is adjusted according to the length of the screw by rotating the adjusting screw 6 and enabling the end part of the adjusting screw 6 to prop against the side surface of the bottom plate 42, and the deformation caused by the clearance and temperature change of the screw can be eliminated after the screw is pre-stretched, so that the positioning precision of the screw is obviously improved to meet the high-precision requirement of machine tool processing.
As shown in fig. 4, the rear bearing housing assembly 5 includes a rear bearing housing 51, a second bearing 52 for supporting the rear end of the ball screw 3, and a second end cap 53 for limiting the second bearing 52. The rear bearing housing 51 is mounted on the cross member 1. The second bearing 52 is mounted in the bore of the rear bearing housing 51. The second end cap 53 is mounted on the rear bearing housing 51. The rear end of the ball screw 3 passes through the rear bearing housing 51 and is connected to the inner ring of the second bearing 52.
The bearing seat 51 is fixedly arranged at the right end of the top of the cross beam 1. The second bearing 52 is embedded in the inner hole of the rear bearing seat 51, and the outer ring of the second bearing 52 is fixedly connected with the rear bearing seat 51. The rear bearing housing 51 is fixed to the mounting surface of the cross member 1 by screws and positioning pins. The rear end of the ball screw 3 passes through the rear bearing block 51 and is fixedly connected to the inner ring of the second bearing 52. The rear end of the ball screw 3 is a fixed end. The second end cap 53 is axially tightened against the rear bearing housing 51 by a lock nut.
By the arrangement of the rear bearing housing 51, the second bearing 52 and the second end cover 53, when the driving device 6 drives the ball screw 3 to rotate, the rear end of the ball screw 3 is fixedly connected to the inner ring of the second bearing 52, so that the ball screw 3 can be ensured to rotate normally. The rear bearing housing 51 is fixed to the mounting surface of the cross member 1 by screws and positioning pins, so that the overall structure can be made more secure.
While preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the utility model.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (3)
1. The novel adjustable prestretching ball screw transmission device is characterized by comprising a cross beam (1), a sliding plate (2) sliding on the cross beam (1), a ball screw (3) for driving the sliding plate (2) to slide, a front bearing seat assembly (4) for supporting the ball screw (3), a rear bearing seat assembly (5) arranged on the cross beam (1) and a driving device (6) for driving the ball screw (3) to rotate; the front bearing seat assembly (4) is arranged on the cross beam (1); the sliding plate (2) is arranged on the ball screw (3); the two ends of the ball screw (3) are respectively and rotatably connected with the front bearing seat assembly (4) and the rear bearing seat assembly (5); the driving device (6) is arranged on the front bearing seat assembly (4), and meanwhile, the driving end of the driving device (6) is in transmission connection with the ball screw (3).
2. A novel adjustable pretensioned ball screw transmission according to claim 1, characterized in that the front bearing housing assembly (4) comprises a front bearing housing (41), a bottom plate (42) mounted on the cross beam (1), a first bearing (43) for supporting the front end of the ball screw (3), a first end cap (44) for limiting the first bearing (43), a connecting sleeve (45) mounted on the front bearing housing (41) and an adjusting screw (46) for tightening the bottom plate (42); the front bearing seat (41) is arranged on the bottom plate (42); the first bearing (43) is arranged in an inner hole of the front bearing seat (41); the first end cover (44) is mounted on the front bearing seat (41); the driving device (6) is connected to the connecting sleeve (45); the adjusting screw (46) is in threaded connection with the front bearing seat (41); the front end of the ball screw (3) sequentially passes through the bottom plate (42) and the front bearing seat (41) and is connected with the inner ring of the first bearing (43); the driving end of the driving device (6) penetrates through the connecting sleeve (45) and is in transmission connection with the ball screw (3).
3. A novel adjustable pre-tensioned ball screw drive according to claim 2, characterized in that the rear bearing housing assembly (5) comprises a rear bearing housing (51), a second bearing (52) for supporting the rear end of the ball screw (3) and a second end cap (53) for limiting the second bearing (52); the rear bearing seat (51) is arranged on the cross beam (1); the second bearing (52) is arranged in an inner hole of the rear bearing seat (51); the second end cover (53) is mounted on the rear bearing seat (51); the rear end of the ball screw (3) passes through the rear bearing seat (51) and is connected with the inner ring of the second bearing (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322715627.2U CN220839144U (en) | 2023-10-10 | 2023-10-10 | Novel adjustable prestretching ball screw transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322715627.2U CN220839144U (en) | 2023-10-10 | 2023-10-10 | Novel adjustable prestretching ball screw transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220839144U true CN220839144U (en) | 2024-04-26 |
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ID=90771672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322715627.2U Active CN220839144U (en) | 2023-10-10 | 2023-10-10 | Novel adjustable prestretching ball screw transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220839144U (en) |
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2023
- 2023-10-10 CN CN202322715627.2U patent/CN220839144U/en active Active
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