Joint ball polishing device

Abstract

The utility model relates to the technical field of artificial joint ball surface machining, in particular to a joint ball head polishing device which comprises a rotary driver, a flexible shaft, a ball head clamp, a handle sleeve, a central spindle and an oil pipe, one end of the flexible shaft is connected with a driving shaft of the rotary driver, and the other end of the flexible shaft is connected with one end of the central spindle. The mandrel is rotatably arranged in the handle sleeve, one end of the mandrel extends out of the handle sleeve to be connected with one end of the ball head clamp, the other end of the ball head clamp is used for clamping a joint ball head, the flexible shaft is arranged in the oil pipe, and the oil pipe and the handle sleeve are fixedly connected through the oil pipe sleeve. The ball head clamp rotates by means of power transmitted from the rotary driver through the driving shaft, the flexible shaft and the core shaft. By using the polishing device disclosed by the utility model, the mirror surface effect of the ball head can be quickly achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of artificial joint ball surface processing, in particular to a joint ball head polishing device. Background Art

[0002] There is a spherical surface part in the hip joint prosthesis - the ball head. In order to reduce the micro-wear and generate a large number of abrasive particles, the outer surface of the ball head needs to be mirror polished. The prior art uses a ball head polisher to assist in the polishing process. For example, the publication number CN114473823A is a high-precision mirror ball head polisher. The polisher is a handheld polisher. During polishing, the machine tool's throwing disc actively rotates at high speed. The polisher has no power device. The throwing disc drives the polisher's main shaft to rotate, that is, the ball head on the polisher rotates passively. On the one hand, only the throwing disc generates grinding force on the ball head. On the other hand, the ball head passively rotates synchronously with the throwing disc, so that the grinding force of the throwing disc on the ball head is small, resulting in low ball head polishing efficiency. Summary of the invention

[0003] In view of the above-mentioned defects of the prior art, the utility model provides a joint ball head polishing device with high ball head mirror polishing efficiency.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a joint ball head polishing device, comprising:

[0005] a rotary drive having a drive shaft;

[0006] A flexible shaft, one end of which is connected to the driving shaft of the rotary driver;

[0007] A ball head clamp, one end of which is used to clamp the joint ball head;

[0008] Handle cover;

[0009] A core shaft, the core shaft is rotatably disposed in the handle sleeve, one end of the core shaft extends out of the handle sleeve and is connected to the other end of the ball head clamp, and the other end of the core shaft is connected to the other end of the flexible shaft;

[0010] An oil pipe, wherein the flexible shaft is arranged in the oil pipe, and the oil pipe is fixedly connected to the handle sleeve;

[0011] The ball head clamp is rotated by power transmitted from the rotary driver via the drive shaft, the flexible shaft and the core shaft.

[0012] When the joint ball head polishing device is provided with a rotary drive, the setting of the flexible shaft can adjust the polishing angle of the ball head at will. The rotation direction of the ball head rotates in the opposite direction to the rotation direction of the oil stone clamped on the lathe. When the ball head and the oil stone are in contact, a large grinding force can be generated, so that the mirror polishing efficiency of the outer surface of the ball head is high. If the rotation direction of the ball head and the oil stone are the same, because the rotation directions are the same, when the two are in contact, there is grinding in the same direction between the ball head and the oil stone, which generates a small grinding force, so the mirror polishing efficiency of the outer surface of the ball head is low.

[0013] Preferably, in the above-mentioned joint ball head polishing device, the two end heads of the flexible shaft are set as square heads, the end face of the driving shaft and the end face of the core shaft connected to the flexible shaft are provided with square grooves matching with the square heads, and power is transmitted between the flexible shaft, the driving shaft and the core shaft through the square heads and the square grooves.

[0014] Preferably, in the above-mentioned joint ball head polishing device, the two end faces of the flexible shaft are provided with square grooves, the end head of the drive shaft and the end head of the mandrel connected to the flexible shaft are provided with square heads matched with the square grooves, and the power is transmitted between the flexible shaft, the drive shaft and the mandrel through the square heads and the square grooves. The square structure is used to transmit large power.

[0015] Preferably, in the above-mentioned joint ball polishing device, a first bearing is sleeved on the mandrel at the corresponding position of the mandrel and the flexible shaft, a second bearing and a third bearing are sleeved on the mandrel near the ball fixture end, a first accommodating portion for accommodating the first bearing is provided at one end of the handle sleeve, and a second accommodating portion for accommodating the second bearing and the third bearing is provided at the other end of the handle sleeve. The arrangement of the bearings prevents the handle sleeve and the oil pipe from rotating, and the driving shaft drives the flexible shaft to drive the mandrel and the ball fixture to rotate.

[0016] Preferably, in the above-mentioned joint ball head polishing device, the end surface of the second accommodating portion is provided with a dust cover, and the middle of the dust cover is provided with an axial hole for the core shaft to pass through. The dust cover has the functions of preventing dust and preventing the bearing from withdrawing.

[0017] Preferably, in the above-mentioned joint ball head polishing device, the inner and outer diameters of the second and third bearings are larger than the inner and outer diameters of the first bearing.

[0018] Preferably, in the above-mentioned joint ball head polishing device, the first bearing shaft is a needle bearing, the second bearing is a thrust ball bearing, and the third bearing is a tapered roller bearing.

[0019] The third bearing adopts a tapered roller bearing, which has a high load-bearing capacity and has radial and axial load-bearing capacity. The axial load-bearing capacity can increase the axial centering force of the core shaft and the soft shaft, so that the radial vibration of the polishing device is small during polishing.

[0020] Preferably, in the above-mentioned joint ball head polishing device, it also includes an oil pipe sleeve and a first screw, the handle sleeve and the oil pipe sleeve are fixedly connected by the first screw, one end of the handle sleeve and one end of the oil pipe are respectively inserted into the two end heads of the oil pipe sleeve, a through hole is provided on the oil pipe sleeve at the connection between the oil pipe sleeve and the handle sleeve, and a first threaded hole is provided on the handle sleeve corresponding to the through hole, the first screw passes through the through hole and is screwed into the first threaded hole, and the oil pipe is connected to the oil pipe sleeve by interference fit.

[0021] Preferably, in the above-mentioned joint ball head polishing device, the core shaft and the ball head clamp are fixedly connected by a second screw, the end of the core shaft is inserted into the ball head clamp, a second threaded hole is provided on the ball head clamp at the connection between the ball head clamp and the core shaft, and a hole is provided on the core shaft corresponding to the second threaded hole, the second screw is screwed into the second threaded hole, and the nail head of the second screw is placed in the hole.

[0022] Preferably, it also includes a sleeve, a connecting sleeve and a flange, one end of the connecting sleeve is connected to the flexible shaft, and the other end is connected to the drive shaft, the drive shaft outer sleeve is provided with the flange, the flange is connected to the rotary driver, one end of the sleeve is connected to the flange by bolts, and the other end of the sleeve is interference-connected with the oil pipe.

[0023] The beneficial effect of the utility model is that when the ball head polishing device of the present invention is used, the ball head and the oil stone rotate independently in opposite directions to each other, and both the ball head and the oil stone generate grinding force. The grinding of the two in opposite directions can produce a superimposed grinding force, which greatly improves the polishing efficiency and enables the ball head to quickly achieve a mirror effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the cross-sectional structure of the joint ball head polishing device of the utility model (the motor is not shown);

[0025] Figure 2 This is a schematic diagram of the exploded structure of the joint ball head polishing device of the utility model;

[0026] Figure 3 It is a schematic diagram of the working state of the joint ball head polishing device of the utility model.

[0027] In the figure, there are a polishing device 100, a handle sleeve 10, a first accommodating portion 11, a second vacant portion 12, a dust cover 13, a core shaft 20, a first bearing 21, a second bearing 22, a third bearing 23, a flexible shaft 30, a square head 31, an oil pipe sleeve 40, a first screw 41, a ball head fixture 50, a second screw 51, a ball head 60, an oil stone 70, a motor 80, a drive shaft 81, a sleeve 82, a connecting sleeve 83, a flange 84, and an oil pipe 90. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0030] like Figure 1-3 As shown, a joint ball head polishing device 100 includes: a motor 80 with a drive shaft 81, a flexible shaft 30, a ball head fixture 50, a handle cover 10, an oil pipe 90 and a mandrel 20. The motor 80 can be fixed on a support on a lathe or outside the lathe. The mandrel 20 can be rotatably arranged in the handle cover 10 and one end of the mandrel 20 extends out of the handle cover 10. The end of the mandrel 20 extending out of the handle cover 10 is connected to one end of the ball head fixture 50, and the other end of the mandrel 20 is connected to one end of the flexible shaft 30. The other end of the flexible shaft 30 is connected to the drive shaft 81 of the motor 80. 1, the other end of the ball head fixture 50 clamps the joint ball head 60; the oil pipe 90 is provided with a flexible shaft 30 and filled with grease, the grease has the effect of lubricating and cooling the flexible shaft 30, and when the oil pipe 90 bends, the flexible shaft 30 also bends, and the grease can isolate the flexible shaft 30 from contacting the oil pipe 90, so that the flexible shaft 30 can also rotate smoothly in the oil pipe 90; the oil pipe 90 and the handle cover 10 are fixedly connected, and the ball head 60 on the ball head fixture 50 rotates with the power transmitted from the motor 80 through the drive shaft 81, the flexible shaft 30 and the core shaft 20. That is, the outer handle cover 10 and the oil pipe 90 do not rotate, and the inner core shaft 20 and the flexible shaft 30 rotate, and the rotation of the core shaft 20 drives the ball head fixture 50 to rotate. The motor 80 can also be replaced by an air compressor.

[0031] like Figure 3As shown, when using the polishing device 100 of the joint ball head 60 of the utility model, the joint ball head 60 to be polished is sleeved on the ball head fixture 50 and clamped by the ball head fixture 50, the ball socket-shaped oil stone 70 is clamped on the three-jaw chuck of the lathe through the tooling, the lathe and the motor connected to the flexible shaft 30 are operated, the rotation of the three-jaw chuck is controlled by the lathe, the rotation of the drive shaft 81 is controlled by the motor, the rotation direction of the drive shaft 81 of the motor is opposite to the rotation direction of the three-jaw chuck, that is, the rotation directions of the ball head 60 and the oil stone 70 are opposite, and then the hand-held polishing device 100 is used to contact the joint ball head 60 with the oil stone 70, first use the 600 mesh oil stone, and then use the 800 mesh oil stone. The polishing efficiency is high when the oil stone mesh number is small, and the surface finish is good when the oil stone mesh number is large. Since the ball head 60 and the oil stone 70 rotate in opposite directions during polishing, a greater grinding force can be generated, which significantly improves the polishing efficiency of the ball head 60, so that the ball head 60 can quickly achieve a mirror effect. In addition, with the setting of the soft shaft 30, the polishing master can complete the polishing of the entire spherical surface by slightly turning the polishing device 100 at a certain angle, which reduces the skill requirements of the polishing master, and different polishing masters can easily do the job, simplifies the polishing operation process, greatly improves the polishing efficiency and reduces the labor intensity of the polishing master. At the same time, it also avoids the sphericity and coaxiality problems of the ball head 60, thereby ensuring the quality of the ball head 60.

[0032] In order to further optimize the above technical solution, the two ends of the flexible shaft 30 are set as square heads 31, the end face of the drive shaft 81 and the end face of the mandrel 20 connected to the flexible shaft 30 are provided with square grooves matching the square heads 31, and the power is transmitted between the flexible shaft 30, the drive shaft 81 and the mandrel 20 through the square heads and the square grooves. Or conversely, the two end faces of the flexible shaft 30 are provided with square grooves, the end face of the drive shaft 81 and the end of the mandrel 20 connected to the flexible shaft 30 are set as square heads matching the square grooves. Or one of the two end faces of the flexible shaft 30 can be set as a square head and the other as a square groove, and the drive shaft 81 and the mandrel 20 connected to the flexible shaft 30 are also set as square grooves or square heads accordingly.

[0033] In order to further optimize the above technical solution, a first bearing 21 is sleeved at the connection between the flexible shaft 30 and the core shaft 20, a second bearing 22 and a third bearing 23 are sleeved at the end of the core shaft 20 close to the ball head fixture 50, a first accommodating portion 11 for accommodating the first bearing is provided at one end of the handle sleeve 10, and a second accommodating portion 12 for accommodating the second bearing 22 and the third bearing 23 is provided at the other end of the handle sleeve 10. The inner and outer diameters of the second and third bearings are larger than the inner and outer diameters of the first bearing; the first bearing shaft is a needle bearing, the second bearing is a thrust ball bearing, and the third bearing is a tapered roller bearing.

[0034] In order to further optimize the above technical solution, a dust cover 13 is provided on the end surface of the second accommodating portion 12 , and an axial hole for the core shaft 20 to pass through is provided in the middle of the dust cover 13 .

[0035] In order to further optimize the above technical solution, it also includes an oil pipe sleeve 40 and a first screw 41, the handle sleeve 10 and the oil pipe sleeve 40 are fixedly connected by the first screw 41, and the oil pipe 90 is connected with the oil pipe sleeve 40 by interference fit. Specifically, one end of the handle sleeve 10 and one end of the oil pipe 90 are respectively inserted into the two ends of the oil pipe sleeve 40, a through hole is provided on the oil pipe sleeve 40 at the connection between the oil pipe sleeve 40 and the handle sleeve 10, and a threaded hole is provided on the handle sleeve 10 corresponding to the through hole, and the first screw 41 passes through the through hole and is screwed into the threaded hole.

[0036] In order to further optimize the above technical solution, the mandrel 20 and the ball head fixture 50 are fixedly connected by a second screw 51. Specifically, the end of the mandrel 20 is inserted into the ball head fixture 50, a second threaded hole 51 is provided on the ball head fixture 50 at the connection between the ball head fixture 50 and the mandrel 20, a hole is provided on the mandrel 20 corresponding to the second threaded hole 51, the second screw 51 is screwed into the second threaded hole, and the nail head of the second screw 51 is placed in the hole.

[0037] It also includes a shaft sleeve 82, a connecting sleeve 83 and a flange 84. One end of the connecting sleeve 82 is connected to the flexible shaft 30, and the other end is connected to the driving shaft 81. The driving shaft 81 is covered with a flange 84, and the flange 84 is connected to the motor 80. One end of the shaft sleeve 82 is connected to the flange 84 by bolts, and the other end of the shaft sleeve 82 is interference fit with the oil pipe 90.

[0038] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A joint ball head polishing device, characterized in that: include: a rotary drive having a drive shaft; A flexible shaft, one end of which is connected to the driving shaft of the rotary driver; A ball head clamp, one end of which is used to clamp the joint ball head; Handle cover; A core shaft, the core shaft is rotatably disposed in the handle sleeve, one end of the core shaft extends out of the handle sleeve and is connected to the other end of the ball head clamp, and the other end of the core shaft is connected to the other end of the flexible shaft; An oil pipe, wherein the flexible shaft is arranged in the oil pipe, and the oil pipe is fixedly connected to the handle sleeve; The ball head clamp is rotated by power transmitted from the rotary driver via the drive shaft, the flexible shaft and the core shaft.

2. The joint ball head polishing device according to claim 1, characterized in that: The two ends of the flexible shaft are set as square heads, the end face of the drive shaft and the end face of the core shaft connected to the flexible shaft are provided with square grooves matching with the square heads, and power is transmitted between the flexible shaft, the drive shaft and the core shaft through the square heads and square grooves.

3. The joint ball head polishing device according to claim 1, characterized in that: The two end faces of the flexible shaft are provided with square grooves, the end of the drive shaft and the end of the core shaft connected to the flexible shaft are configured as square heads matching the square grooves, and power is transmitted between the flexible shaft, the drive shaft and the core shaft through the square heads and the square grooves.

4. The joint ball head polishing device according to claim 1, characterized in that: A first bearing is sleeved on the core shaft at a position corresponding to the connection between the core shaft and the flexible shaft, and a second bearing and a third bearing are respectively sleeved on the core shaft near the ball head clamp end. A first accommodating portion for accommodating the first bearing is provided at one end of the handle cover, and a second accommodating portion for accommodating the second bearing and the third bearing is provided at the other end of the handle cover.

5. The joint ball head polishing device according to claim 4, characterized in that: A dust cover is provided on the end surface of the second accommodating portion, and an axial hole for the core shaft to pass through is provided in the middle of the dust cover.

6. The joint ball head polishing device according to claim 4, characterized in that: The inner and outer diameters of the second and third bearings are larger than the inner and outer diameters of the first bearing.

7. The joint ball head polishing device according to claim 4, characterized in that: The first bearing is a needle bearing, the second bearing is a thrust ball bearing, and the third bearing is a tapered roller bearing.

8. The joint ball head polishing device according to claim 1, characterized in that: It also includes an oil pipe sleeve and a first screw, the handle sleeve and the oil pipe sleeve are fixedly connected by the first screw, one end of the handle sleeve and one end of the oil pipe are respectively inserted into the two end heads of the oil pipe sleeve, a through hole is provided on the oil pipe sleeve at the connection between the oil pipe sleeve and the handle sleeve, and a first threaded hole is provided on the handle sleeve corresponding to the through hole, the first screw passes through the through hole and is screwed into the first threaded hole, and the oil pipe is connected to the oil pipe sleeve by interference fit.

9. The joint ball head polishing device according to claim 1, characterized in that: The core shaft and the ball head clamp are fixedly connected by a second screw, the end of the core shaft is inserted into the ball head clamp, the ball head clamp is provided with the second threaded hole at the connection between the ball head clamp and the core shaft, and a hole is provided on the core shaft corresponding to the second threaded hole, the second screw is screwed into the second threaded hole, and the nail head of the second screw is placed in the hole.

10. The joint ball head polishing device according to claim 1, characterized in that: It also includes a shaft sleeve, a connecting sleeve and a flange, one end of the connecting sleeve is connected to the flexible shaft, and the other end is connected to the driving shaft, the driving shaft outer sleeve is provided with the flange, and the flange is connected to the rotating driver, one end of the shaft sleeve is connected to the flange by bolts, and the other end of the shaft sleeve is interference-connected with the oil pipe.

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