Device for detecting center distance between worm gear and worm

Abstract

The utility model discloses a worm gear and worm center distance detection device, which is characterized in that a rack is provided with a first clamping assembly for clamping a wheel shaft and a second clamping assembly for clamping a worm, the rack is provided with a first sliding rail connected with the first clamping assembly in a sliding manner, the rack is provided with a through hole, the worm is positioned between the first clamping assembly and the through hole, and the worm is positioned between the second clamping assembly and the through hole. The face, facing the rack, of the first clamping assembly is connected with a connecting line parallel to the first sliding rail, and the connecting line penetrates through the through hole to be connected with a drop hammer. The drop hammer applies constant radial force to the first clamping assembly under the action of gravity, so that the worm gear moves towards the worm under the clamping of the first clamping assembly, the worm gear and the worm are in an engaged state, constant engagement force of the worm gear and the worm is kept, the second clamping assembly drives the worm to rotate, and the worm is clamped by the second clamping assembly. And the center distance fluctuation data of the worm gear and the offset in the meshing process of the worm gear and the worm are measured by the position sensor and are transmitted to the controller. Compared with a spring applied force in the market, the radial force of the drop hammer is more constant and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical assembly, in particular to a worm gear center distance detection device. Background Art

[0002] Worm gear transmission is a common structure in machinery. It has the advantages of compact structure, high transmission ratio, and staggered shaft transmission. However, it also has disadvantages such as high axial stress, strong tooth surface friction, high heat generation, and high lubrication requirements. In addition, due to the complex shape and high processing difficulty, when the worm gear is meshing, in addition to ensuring that the end face module of the worm wheel is equal to the axial face module of the worm and the end face pressure angle of the worm wheel is equal to the axial face pressure angle of the worm, it is also important to ensure the meshing center distance between the two. Incorrect meshing center distance will affect the strength, heat generation, lubrication, etc. of the teeth, and thus the results and life of the worm gear transmission cannot be guaranteed. Patent CN205843569U discloses a device for measuring the center distance of a worm gear meshing, which first moves the fixed block 5 so that the fixed block 5 gradually approaches the fixed block 8 under the action of the restoring force of the spring 13 until the worm wheel 6 on the fixed block 5 contacts the worm 19 on the fixed block 8, and then turns the hand wheel 12 to drive the worm 19 to rotate one circle to read the maximum deflection value on the dial indicator 10, which is the center distance error when the worm wheel 6 to be measured is meshed with the worm 19. However, this solution has a defect, that is, the restoring force of the spring 13 is not constant, which makes the measurement result prone to errors. Utility Model Content

[0003] In view of the above problems, the utility model provides a worm gear center distance detection device to overcome at least one disadvantage.

[0004] The technical solution adopted by the utility model is as follows: a worm gear center distance detection device, comprising a frame, a worm wheel, a wheel axle inserted in the inner hole of the worm wheel and a worm meshing with the worm wheel, the frame is provided with a first clamping assembly for clamping the wheel axle and a second clamping assembly for clamping the worm, the frame is provided with a first slide rail slidably connected to the first clamping assembly, the frame is provided with a through hole, the worm is located between the first clamping assembly and the through hole, the first clamping assembly is connected to a connecting line arranged parallel to the first slide rail on one side facing the frame, the connecting line is connected to a hanging hammer through the through hole, and the second clamping assembly is provided with a position sensor.

[0005] Optionally, the first clamping assembly includes a first support plate, a second support plate, a first positioning rod and a second positioning rod installed on the second support plate, the bottom surface of the first support plate is provided with a first sliding block slidably connected to the first sliding rail, the second support plate and the first positioning rod are both installed on the first support plate, the first positioning rod is abutted against one end of the wheel axle, and the second positioning rod is movably abutted against the other end of the wheel axle.

[0006] Optionally, the first clamping assembly also includes a first mounting block for mounting a second positioning rod, the second support plate is vertically arranged to the first support plate, the second support plate is provided with a second slide rail along the length direction, the first mounting block is provided with a second slider slidably connected to the second slide rail, and the first mounting block is connected to a first driving member.

[0007] Optionally, a connecting plate connected to the connecting line is provided on the bottom surface of the first support plate, a rotating shaft is provided on the inner wall of the through hole, a rotating wheel is provided on the sliding sleeve of the outer peripheral wall of the rotating shaft, and the connecting line passes around the rotating wheel and is connected to the hanging hammer.

[0008] Optionally, the second clamping assembly includes a left assembly and a right assembly, the left assembly includes a third support plate, a third mounting block slidably connected to the third support plate, and a third push rod rotatably mounted on the third support block, the right assembly includes a fourth support plate, a fourth mounting block slidably connected to the fourth support plate, and a fourth push rod rotatably mounted on the fourth support block, the third push rod abuts against one end of the worm gear, and the fourth push rod abuts against the other end of the worm gear.

[0009] Optionally, the third support plate is provided with a third slide rail, the bottom surface of the third mounting block is provided with a third slider slidably connected to the third slide rail, the fourth support plate is provided with a fourth slide rail, the bottom surface of the fourth mounting block is provided with a fourth slider slidably connected to the fourth slide rail, the end of the fourth push rod facing away from the worm gear is connected to a rotating motor, the third mounting block is connected to a second driving member, and the fourth mounting block is connected to a third driving member.

[0010] Optionally, the third mounting block includes a first connecting plate and a second connecting plate vertically connected to the first connecting plate, the third sliding block is provided on the bottom surface of the first connecting plate, and the third top rod is rotatably connected to the second connecting plate. The fourth mounting block includes a third connecting plate and a fourth connecting plate vertically connected to the third connecting plate, the fourth sliding block is provided on the bottom surface of the third connecting plate, and the fourth top rod is rotatably connected to the fourth connecting plate. The first connecting plate is connected to the first driving member.

[0011] Optionally, the pendulum is a weight.

[0012] The beneficial effects of the utility model are as follows: the hanging hammer applies a constant radial force to the first clamping assembly under the action of gravity, so that the worm wheel moves toward the worm under the clamping of the first clamping assembly, so that the worm wheel and the worm are in a meshing state, and the constant meshing force between the worm wheel and the worm is maintained, and the second clamping assembly drives the worm to rotate, and the center distance fluctuation data of the worm wheel and the offset in the meshing process of the worm wheel and the worm are measured and transmitted to the controller through the position sensor. Compared with the spring force applied on the market, the radial force of the hanging hammer is more constant and reliable, ensuring the accuracy of the measurement result. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the worm gear meshing center distance measuring device mentioned in the background technology;

[0014] Figure 2 An overall schematic diagram of a worm gear center distance detection device proposed in an embodiment of the utility model;

[0015] Figure 3 A schematic diagram of a first clamping assembly and a second clamping assembly of a worm gear center distance detection device provided in an embodiment of the utility model;

[0016] Figure 4 A top view of a worm gear center distance detection device provided in an embodiment of the utility model.

[0017] 1. The markings in the accompanying drawings are: 1. frame; 2. worm gear; 3. axle; 4. worm; 5. through hole; 6. connecting line; 7. hanging hammer; 8. position sensor; 9. first support plate; 10. second support plate; 11. first positioning rod; 12. second positioning rod; 13. first slider; 14. first mounting block; 15. second slide rail; 16. second slider; 17. connecting plate; 18. rotating wheel; 19. third support plate; 20. third mounting block; 21. third push rod; 22. fourth support plate; 23. fourth mounting block; 24. fourth push rod; 25. third slide rail; 26. third slider; 27. fourth slide rail; 28. fourth slider; 29. ​​rotating motor; 30. second drive member; 31. third drive member; 32. first connecting plate; 33. second connecting plate; 34. third connecting plate; 35. fourth connecting plate. DETAILED DESCRIPTION

[0018] The utility model is described in detail below in conjunction with the accompanying drawings.

[0019] like Figure 2 and 4As shown, a device for detecting the center distance of a worm wheel 2 and a worm 4 comprises a frame 1, a worm wheel 2, a wheel shaft 3 inserted in the inner hole of the worm wheel 2 and a worm 4 meshing with the worm wheel 2, the frame 1 is provided with a first clamping assembly for clamping the wheel shaft 3 and a second clamping assembly for clamping the worm 4, the frame 1 is provided with a first slide rail slidably connected to the first clamping assembly, the frame 1 is provided with a through hole 5, the worm 4 is located between the first clamping assembly and the through hole 5, the first clamping assembly is connected to a connecting line 6 arranged parallel to the first slide rail on a side facing the frame 1, the connecting line 6 passes through the through hole 5 and is connected to a hanging hammer 7, and the second clamping assembly is provided with a position sensor 8. The pendulum 7 applies a constant radial force to the first clamping assembly under the action of gravity, so that the worm wheel 2 moves toward the worm 4 under the clamping of the first clamping assembly, so that the worm wheel 2 and the worm 4 are in a meshing state, and the constant meshing force between the worm wheel 2 and the worm 4 is maintained. The second clamping assembly drives the worm 4 to rotate, and the center distance fluctuation data of the worm wheel 2 and the offset during the meshing process of the worm wheel 2 and the worm 4 are measured by the position sensor 8 and transmitted to the controller. Compared with the spring force applied on the market, the radial force of the pendulum 7 is more constant and reliable, ensuring the accuracy of the measurement results. Among them, the detection of the center distance fluctuation data of the worm wheel 2 and the offset during the meshing process of the worm wheel 2 and the worm 4 by the position sensor 8 belongs to the prior art.

[0020] In this embodiment, if Figure 2 and 3 As shown, the first clamping assembly includes a first support plate 9, a second support plate 10, a first positioning rod 11 and a second positioning rod 12 installed on the second support plate 10. The bottom surface of the first support plate 9 is provided with a first slider 13 slidably connected to the first slide rail. The second support plate 10 and the first positioning rod 11 are both installed on the first support plate 9. The first positioning rod 11 abuts against one end of the axle 3, and the second positioning rod 12 movably abuts against the other end of the axle 3. The first positioning rod 11 and the second positioning rod 12 clamp the axle 3 in the middle, and the hanging hammer 7 drives the first support plate 9 to slide along the first slide rail through the connecting line 6, providing a constant radial force for the worm wheel 2 and the worm 4.

[0021] In this embodiment, if Figure 2 As shown, the first clamping assembly further includes a first mounting block 14 for mounting the second positioning rod 12, the second support plate 10 is vertically arranged with the first support plate 9, the second support plate 10 is provided with a second slide rail 15 along the length direction, the first mounting block 14 is provided with a second slider 16 slidably connected with the second slide rail 15, and the first mounting block 14 is connected with a first driving member. The first driving member can be a cylinder or a hydraulic cylinder, and the cylinder or the hydraulic cylinder drives the second positioning rod 12 to move toward or away from the wheel axle 3 through the mounting block, so that the first positioning rod 11 and the second positioning rod 12 clamp the wheel axle 3.

[0022] In this embodiment, if Figure 3and 4 As shown, the bottom surface of the first support plate 9 is provided with a connecting plate 17 connected to the connecting line 6, the inner wall of the through hole 5 is provided with a rotating shaft, the sliding sleeve of the outer peripheral wall of the rotating shaft is provided with a rotating wheel 18, and the connecting line 6 passes through the rotating wheel 18 and is connected to the hanging hammer 7. The rotating wheel 18 increases the smoothness of the movement of the connecting line 6 driven by the hanging hammer 7.

[0023] In this embodiment, if Figure 3 As shown, the second clamping assembly includes a left assembly and a right assembly, the left assembly includes a third support plate 19, a third mounting block 20 slidably connected to the third support plate 19, and a third push rod 21 rotatably mounted on the third support block, the right assembly includes a fourth support plate 22, a fourth mounting block 23 slidably connected to the fourth support plate 22, and a fourth push rod 24 rotatably mounted on the fourth support block, the third push rod 21 abuts against one end of the worm 4, and the fourth push rod 24 abuts against the other end of the worm 4.

[0024] In this embodiment, if Figure 3 As shown, the third support plate 19 is provided with a third slide rail 25, the bottom surface of the third mounting block 20 is provided with a third slider 26 slidably connected to the third slide rail 25, the fourth support plate 22 is provided with a fourth slide rail 27, the bottom surface of the fourth mounting block 23 is provided with a fourth slider 28 slidably connected to the fourth slide rail 27, the end of the fourth push rod 24 away from the worm 4 is connected to a rotating motor 29, the third mounting block 20 is connected to a second driving member 30, and the fourth mounting block 23 is connected to a third driving member 31. The motor drives the fourth push rod 24 to rotate, and since the third push rod 21 and the fourth push rod 24 are pressed against the worm 4, the worm 4 drives the third push rod 21 to rotate synchronously. The second driving member and the third driving member 31 can be cylinders or hydraulic cylinders respectively, and the third driving member 31 can also be a hand wheel. When the third driving member 31 is a hand wheel, the fourth support plate 22 is provided with a fixed block, and a screw hole is provided inside the fixed block. The hand wheel is connected to the fourth mounting block 23 through a screw rod passing through the screw hole.

[0025] In this embodiment, if Figure 3 As shown, the third mounting block 20 includes a first connecting plate 32 and a second connecting plate 33 vertically connected to the first connecting plate 32, the third slider 26 is provided on the bottom surface of the first connecting plate 32, the third push rod 21 is rotatably connected to the second connecting plate 33, the fourth mounting block 23 includes a third connecting plate 34 and a fourth connecting plate 35 vertically connected to the third connecting plate 34, the fourth slider 28 is provided on the bottom surface of the third connecting plate 34, the fourth push rod 24 is rotatably connected to the fourth connecting plate 35, and the first connecting plate 32 is connected to the first driving member.

[0026] In this embodiment, if Figure 2As shown, the pendulum 7 is a weight. A constant radial force can be provided to the worm gear 2 by replacing weights of different weights.

[0027] The above description is only a preferred embodiment of the utility model, and does not limit the patent protection scope of the utility model. Any equivalent structural transformation made using the contents of the utility model specification and drawings, directly or indirectly used in other related technical fields, is also included in the protection scope of the utility model.

Claims

1. A worm gear center distance detection device, comprising a frame, a worm gear, a wheel shaft inserted in the inner hole of the worm gear, and a worm gear meshing with the worm gear, characterized in that: The frame is provided with a first clamping assembly for clamping the wheel axle and a second clamping assembly for clamping the worm gear, the frame is provided with a first slide rail slidably connected to the first clamping assembly, the frame is provided with a through hole, the worm gear is located between the first clamping assembly and the through hole, the first clamping assembly is connected to a connecting line arranged parallel to the first slide rail on one side facing the frame, the connecting line is connected to a hanging hammer through the through hole, and the second clamping assembly is provided with a position sensor.

2. The worm gear center distance detection device according to claim 1, characterized in that: The first clamping assembly includes a first support plate, a second support plate, a first positioning rod and a second positioning rod installed on the second support plate. The bottom surface of the first support plate is provided with a first sliding block slidably connected to the first slide rail. The second support plate and the first positioning rod are both installed on the first support plate. The first positioning rod is abutted against one end of the wheel axle, and the second positioning rod is movably abutted against the other end of the wheel axle.

3. The worm gear center distance detection device according to claim 2, characterized in that: The first clamping assembly also includes a first mounting block for mounting a second positioning rod, the second support plate is vertically arranged to the first support plate, the second support plate is provided with a second slide rail along the length direction, the first mounting block is provided with a second slider slidably connected to the second slide rail, and the first mounting block is connected to a first driving member.

4. The worm gear center distance detection device according to claim 2, characterized in that: A connecting plate connected to the connecting line is provided on the bottom surface of the first supporting plate, a rotating shaft is provided on the inner wall of the through hole, a rotating wheel is provided on the sliding sleeve of the outer peripheral wall of the rotating shaft, and the connecting line passes around the rotating wheel and is connected to the hanging hammer.

5. The worm gear center distance detection device according to claim 1, characterized in that: The second clamping assembly includes a left assembly and a right assembly, the left assembly includes a third support plate, a third mounting block slidably connected to the third support plate, and a third push rod rotatably mounted on the third support block, the right assembly includes a fourth support plate, a fourth mounting block slidably connected to the fourth support plate, and a fourth push rod rotatably mounted on the fourth support block, the third push rod abuts against one end of the worm gear, and the fourth push rod abuts against the other end of the worm gear.

6. The worm gear center distance detection device according to claim 5, characterized in that: The third support plate is provided with a third slide rail, the bottom surface of the third mounting block is provided with a third slider slidably connected to the third slide rail, the fourth support plate is provided with a fourth slide rail, the bottom surface of the fourth mounting block is provided with a fourth slider slidably connected to the fourth slide rail, the end of the fourth push rod facing away from the worm is connected to a rotating motor, the third mounting block is connected to a second driving member, and the fourth mounting block is connected to a third driving member.

7. The worm gear center distance detection device according to claim 6, characterized in that: The third mounting block includes a first connecting plate and a second connecting plate vertically connected to the first connecting plate, the third sliding block is provided on the bottom surface of the first connecting plate, and the third push rod is rotatably connected to the second connecting plate. The fourth mounting block includes a third connecting plate and a fourth connecting plate vertically connected to the third connecting plate, the fourth sliding block is provided on the bottom surface of the third connecting plate, and the fourth push rod is rotatably connected to the fourth connecting plate. The first connecting plate is connected to the first driving member.

8. The worm gear center distance detection device according to claim 1, characterized in that: The hanging weight is a weight.

Images