Ball screw
By setting a gap elimination device in the ball screw, the ball sleeve is tightly attached to the screw with adjustment screws and elastic devices, the gap problem caused by wear is solved, maintaining the accuracy of the equipment and extending the service life.
Patent Information
- Application Number
- CN202311838701.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-28
- Publication Date
- 2025-07-01
AI Technical Summary
The gap caused by wear during use of the ball screw will increase, affecting the accuracy of the equipment.
A ball screw is designed, which includes two ball sleeves and two sets of balls. By setting a gap elimination device between the outer jacket and the second ball sleeve, a relative force is generated between the ball sleeve by adjusting screws and elastic means, close to the screw, and the gap generated by friction and inertia is compensated by the elastic means.
Completely eliminate the gap of the ball screw, maintain the equipment accuracy, and the elastic device can compensate for the gap caused by wear at any time, extending the service life of the equipment.
Smart Images
Figure CN120231859A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a transmission device, and particularly to a ball screw. Background Art
[0003] With the development of China's industry, various mechanical equipment has become more and more advanced, and the transmission devices used in various mechanical equipment have become more and more precise. For example, ball screws have very high precision, but they will still wear out over time, and the back-and-forth clearance will become larger and larger, seriously affecting the precision of the equipment.
[0004] In view of the above defects, the creator of the present invention finally invented a technology that can eliminate the clearance of the ball screw after a long time of research. Summary of the Invention
[0005] The purpose of the present invention is to provide a ball screw, which includes a screw rod, balls, ball sleeves and an outer sleeve. There are two ball sleeves, namely a first ball sleeve and a second ball sleeve. There are two groups of balls, namely a first group of balls and a second group of balls. The first group of balls is arranged between the screw rod and the first ball sleeve, and the second group of balls is arranged between the screw rod and the second ball sleeve. The outer sleeve is fixed to the first ball sleeve by screws, and a clearance elimination device for the ball screw is arranged between the outer sleeve and the second ball sleeve; The clearance elimination device includes: a positioning hole is arranged on the end face of the second ball sleeve, a screw hole is arranged on the outer sleeve corresponding to the positioning hole on the end face of the second ball sleeve, a first adjusting screw is installed in the screw hole, a part of the first adjusting screw enters the positioning hole to be used as a positioning pin, and an elastic device is arranged at the end of the positioning pin; The clearance elimination device includes: a screw hole is arranged on the end face of the second ball sleeve, a screw installation hole is arranged on the outer sleeve corresponding to the screw hole on the end face of the second ball sleeve, a second adjusting screw is installed in the screw installation hole, the second adjusting screw is installed in the screw hole on the end face of the second ball sleeve, and an elastic device is arranged between the nut part of the second adjusting screw and the outer sleeve.
[0006] Compared with the prior art, the beneficial effect of the present invention is that: a clearance elimination device for the ball screw is arranged between the outer sleeve and the second ball sleeve. The second ball sleeve can be pulled or pushed through the adjusting screw on the clearance elimination device, so that a relative acting force is generated between the first ball sleeve and the second ball sleeve, and the two groups of balls are always tightly attached to the screw rod and the ball sleeve in opposite directions. Moreover, elastic devices are arranged on the adjusting screws, and the clearance generated by friction of the ball screw can be compensated at any time, so as to completely eliminate the clearance of the ball screw. Brief Description of the Drawings
[0007] Figure 1 It is a schematic cross-sectional structure diagram of the first technical solution of the present invention; Figure 2 It is a schematic cross-sectional structure diagram of the second technical solution of the present invention; Embodiment
[0008] The following further describes in detail the above and other technical features and advantages of the present invention with reference to the accompanying drawings.
[0009] The first technical solution is as Figure 1 shown, providing a ball screw, including a screw rod 1, balls, ball sleeves and an outer sleeve 10. There are two ball sleeves, namely a first ball sleeve 6 and a second ball sleeve 8. There are two groups of balls, namely a first group of balls 7 and a second group of balls 4. The first group of balls 7 is arranged between the screw rod 1 and the first ball sleeve 6, and the second group of balls 4 is arranged between the screw rod 1 and the second ball sleeve 8. The outer sleeve 10 and the first ball sleeve 6 are fixed by screws 2. A clearance elimination device for the ball screw is arranged between the outer sleeve 10 and the second ball sleeve 8. The clearance elimination device includes: a positioning hole is arranged on the end face of the second ball sleeve 8, a screw hole is arranged on the outer sleeve 10 corresponding to the positioning hole on the end face of the second ball sleeve 8, a first adjusting screw 5 is installed in the screw hole, a part of the first adjusting screw 5 enters the positioning hole and is used as a positioning pin, and an elastic device 11 is arranged at the end of the positioning pin. The elastic device can be a spring or elastic rubber.
[0010] In a specific embodiment of the first technical solution, the adjusting screw 5 on the clearance elimination device can be used to push the elastic device and the second ball sleeve 8, so that a relative acting force is generated between the first ball sleeve 6 and the second ball sleeve 8, so that the balls 7 and 4 always closely adhere to the screw rod 1, the ball sleeve 6 and the ball sleeve 8 in a symmetric direction. Moreover, the elastic device 11 arranged at the end of the adjusting screw 5 can always compensate for the clearance generated by the ball screw due to friction and reciprocating inertia. When the wear is too large and the elastic device compensation is insufficient, the elastic device can be replaced or the adjusting screw can be adjusted, so as to completely eliminate the clearance generated by the reciprocating inertia of the ball screw.
[0011] The second technical solution is as Figure 2As shown in the figure, a ball screw is provided, which includes a lead screw 16, balls, ball sleeves and an outer sleeve 18. There are two ball sleeves, namely a first ball sleeve 21 and a second ball sleeve 23. There are two groups of balls, namely a first group of balls 22 and a second group of balls 19. The first group of balls 22 is arranged between the lead screw 16 and the first ball sleeve 21, and the second group of balls 19 is arranged between the lead screw 16 and the second ball sleeve 23. The outer sleeve 18 and the first ball sleeve 21 are fixed by a screw 17. A clearance elimination device of the ball screw is arranged between the outer sleeve 18 and the second ball sleeve 23. The clearance elimination device includes: a screw hole 25, which is arranged on the end face of the second ball sleeve 23. A screw mounting hole is arranged on the outer sleeve 18 corresponding to the screw hole 25 on the end face of the second ball sleeve 23. A second adjusting screw 15 is installed in the screw mounting hole. The second adjusting screw 15 is installed in the screw hole 25 on the end face of the second ball sleeve 23. An elastic device 12 is arranged between the nut portion of the second adjusting screw 15 and the outer sleeve 18. The elastic device can be a flat pad spring, a corrugated spring or elastic rubber.
[0012] In the specific embodiment of Technical Solution 2, the second ball sleeve 23 can be pulled by the adjusting screw 15 on the clearance elimination device, so that the elastic device 12 is compressed. A relative acting force is generated between the first ball sleeve 21 and the second ball sleeve 23, so that the balls 22 and 19 always closely adhere to the lead screw 16 and the ball sleeves 21 and 23 in a symmetric direction. Moreover, the elastic device 12 arranged between the nut portion of the adjusting screw 15 and the outer sleeve 18 can always compensate for the clearance generated by the ball screw due to friction and reciprocating inertia. When the wear is too large and the elastic device cannot compensate enough, the elastic device can be replaced or the adjusting screw can be adjusted, so as to completely eliminate the clearance generated by the reciprocating inertia of the ball screw.
[0013] The above are only the preferred embodiments of the present invention, which are illustrative rather than restrictive to the present invention. Those skilled in the art understand that many changes, modifications and even equivalents can be made within the spirit and scope defined by the claims of the present invention, but all will fall within the protection scope of the present invention.
Claims
1. A ball screw, comprising a lead screw, balls, a ball sleeve and an outer sleeve, characterized in that There are two ball sleeves, namely a first ball sleeve and a second ball sleeve. There are two groups of balls, namely a first group of balls and a second group of balls. The first group of balls is arranged between the lead screw and the first ball sleeve, and the second group of balls is arranged between the lead screw and the second ball sleeve. The outer sleeve is fixed to the first ball sleeve by screws, and a clearance elimination device for the ball screw is arranged between the outer sleeve and the second ball sleeve.
2. A ball screw according to claim 1, in the first technical solution, characterized in that, The clearance elimination device includes: a positioning hole is arranged on the end face of the second ball sleeve, a screw hole is arranged on the outer sleeve corresponding to the positioning hole on the end face of the second ball sleeve, a first adjusting screw is installed in the screw hole, a part of the first adjusting screw enters the positioning hole to be used as a positioning pin, and an elastic device is arranged at the end of the positioning pin.
3. A ball screw according to claim 1, technical solution two, characterized in that, The clearance elimination device includes: a screw hole, which is arranged on the end face of the second ball sleeve, a screw installation hole is arranged on the outer sleeve corresponding to the screw hole on the end face of the second ball sleeve, a second adjusting screw is installed in the screw installation hole, the second adjusting screw is installed in the screw hole on the end face of the second ball sleeve, and an elastic device is arranged between the nut part of the second adjusting screw and the outer sleeve.