An expandable gear grinding fixture

Abstract

The utility model discloses an expandable gear grinding fixture, and the utility model relates to the technical field of gear grinding processing accessories. The device comprises: a connecting shaft; a threaded rod, the outer wall of the threaded rod is threadedly connected to the inner wall of the connecting shaft; a ventilator, the bottom of the ventilator is fixedly connected to the top of the threaded rod; a tire expander, the inner side wall of the tire expander is slidably connected to the outer wall of the ventilator; an anti-slip device, the bottom of the anti-slip device is slidably connected to the top of the tire expander; a limiting nut, the inner side wall of the limiting nut is threadedly connected to the outer wall of the ventilator, and the gear grinding is clamped by setting the anti-slip device and the tire expander, and the expandable fixture is selected to clamp the gear grinding by internal expansion to reduce the gap as much as possible, and the tire expander without taper is selected to reduce the gap between the fixture and the workpiece, thereby making the clamping of the gear grinding workpiece more stable, and achieving the purpose of reducing the gap between the workpiece and the fixture.

Description

Technical Field

[0001] The utility model relates to the technical field of gear grinding accessories, in particular to an expandable gear grinding fixture. Background Art

[0002] The gear grinding fixture is a device used to fix the workpiece during gear grinding. It can ensure that the workpiece maintains a stable and accurate position during the gear grinding process in order to obtain a high-precision tooth shape. Its design must take into account factors such as the shape and size of the workpiece. Through a reasonable structure and clamping method, it ensures smooth processing and good quality. It is an important auxiliary tool in the gear grinding process.

[0003] In the prior art, gear grinding fixtures include tapered mandrel fixtures, top-to-top fixtures and other types. Tapered mandrel fixtures and tapered expandable fixtures are more commonly used in traditional gear grinding. The gear is positioned and clamped by centering the mandrel. However, high precision is required for the fixture. There is often a gap between the workpiece and the fixture due to the taper setting. The gap will affect the machining accuracy of the gear grinding and cause errors in the gear grinding process. Utility Model Content

[0004] In view of the deficiencies of the prior art, the technical solution adopted by the utility model to solve the technical problems is: an expandable gear grinding fixture, comprising: a connecting shaft; a threaded rod, the outer wall of the threaded rod is threadedly connected to the inner wall of the connecting shaft; a ventilation device, the bottom of the ventilation device is fixedly connected to the top of the threaded rod; a tire expander, the side wall inside the tire expander is slidably connected to the outer wall of the ventilation device; an anti-slip device, the bottom of the anti-slip device is slidably connected to the top of the tire expander; a limiting nut, the side wall inside the limiting nut is threadedly connected to the outer wall of the ventilation device; the ventilation device includes a fixing cylinder, the The bottom of the inner wall of the fixed cylinder is fixedly connected with a compression spring, and a fixing ring is arranged outside the compression spring, and a pressing column is slidably connected to the side wall inside the fixing ring, and a connecting hole is provided on the outer wall of the top of the fixed cylinder, and an upper ventilation groove is provided on the top of the side wall of the fixed cylinder, and a lower ventilation groove is provided on the top of the side wall of the fixed cylinder. The grinding gear is clamped by arranging an anti-slip device and a tire expansion device, and an expandable clamp is selected to clamp the grinding gear by internal expansion to reduce the gap as much as possible. At the same time, a non-tapered tire expansion device is selected to reduce the gap between the clamp and the workpiece, thereby making the clamping of the grinding gear workpiece more stable.

[0005] Preferably, the outer wall of the connecting shaft is provided with a connecting inclined surface, the inner wall of the connecting shaft is threadedly connected to the outer wall of the threaded rod through an internal thread groove, and the internal thread groove is provided in the wall of the connecting shaft, the top of the connecting shaft is fixedly connected with a positioning ring, the top of the threaded rod is fixedly connected to the bottom of the axis of the fixed cylinder, the inner wall of the limit nut is threadedly connected to the outer wall of the fixing ring, and the bottom of the outer wall of the fixing ring is fixedly connected to the outer wall of the top of the fixed cylinder. The setting of the connecting shaft facilitates the assembly of the clamp and fixes the bulging tire at the same time, so that the bulging tire fits more closely to the internal components of the clamp.

[0006] Preferably, the tire expander comprises a tire ring, a positioning protrusion is fixedly connected to the bottom of the tire ring, an anti-slip protrusion is fixedly connected to the side wall inside the tire ring, and a positioning groove is formed on the outer wall of the top of the tire ring.

[0007] Preferably, the anti-slip device includes an anti-slip plate, an outer wall of the anti-slip plate is provided with a movable hole at the axis center, a connecting column is fixedly connected to the bottom of the anti-slip plate, a connecting protrusion is fixedly connected to the bottom of the anti-slip plate, the connecting column is fixedly connected to the inner wall of the fixed cylinder by bolts, the outer wall of the connecting protrusion is slidably connected to the outer wall of the positioning groove, the side wall inside the tire ring is slidably connected to the outer wall of the fixed cylinder, and the gear grinding fixture is provided to make the tire easier to install and the tire clamping more stable, and the edge of the tire is prevented from warping by fixing both ends of the tire ring.

[0008] The beneficial effects of the utility model are as follows:

[0009] 1. The utility model clamps the grinding gear by setting an anti-slip device and a tire expansion device, selects an expandable clamp, and clamps the grinding gear by internal expansion to reduce the gap as much as possible. At the same time, a non-tapered tire expansion device is selected to reduce the gap between the clamp and the workpiece, thereby making the clamping of the grinding workpiece more stable.

[0010] 2. The utility model makes it easier to install the tire by providing the gear grinding fixture, and at the same time makes the tire clamping more stable, and prevents the edge of the tire from rising by fixing the two ends of the tire ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is the front view of the utility model;

[0012] Figure 2 It is a cross-sectional view of the utility model;

[0013] Figure 3 It is a structural schematic diagram of the ventilation device of the utility model;

[0014] Figure 4 It is a schematic diagram of the local structure of the tire ring of the utility model.

[0015] In the figure: 1. connecting shaft; 2. threaded rod; 3. ventilation device; 4. tire expansion; 5. anti-slip device; 6. limiting nut; 11. connecting inclined surface; 12. internal thread groove; 13. positioning ring; 31. fixing cylinder; 32. compression spring; 33. fixing ring; 34. pressing column; 35. connecting hole; 36. upper ventilation groove; 37. lower ventilation groove; 41. tire ring; 42. positioning protrusion; 43. anti-slip protrusion; 44. positioning groove; 51. anti-slip plate; 52. movable hole; 53. connecting column; 54. connecting protrusion. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

[0017] Example: See Figure 1 - Figure 4 The utility model provides a technical solution: an expandable gear grinding fixture, comprising: a connecting shaft 1; a threaded rod 2, the outer wall of the threaded rod 2 is threadedly connected to the inner wall of the connecting shaft 1; a ventilator 3, the bottom of the ventilator 3 is fixedly connected to the top of the threaded rod 2; a tire expander 4, the side wall inside the tire expander 4 is slidably connected to the outer wall of the ventilator 3; an anti-slip device 5, the bottom of the anti-slip device 5 is slidably connected to the top of the tire expander 4; a limiting nut 6, the side wall inside the limiting nut 6 is threadedly connected to the outer wall of the ventilator 3; the ventilator 3 comprises a fixed cylinder 31, the bottom of the inner wall of the fixed cylinder 31 is fixedly connected to a compression spring 32, a fixing ring 33 is arranged outside the compression spring 32, a pressing column 34 is slidably connected to the side wall inside the fixing ring 33, and the outer wall of the top of the fixed cylinder 31 is opened. A connecting hole 35 is provided, an upper ventilation groove 36 is provided on the top of the side wall of the fixed cylinder 31, and a lower ventilation groove 37 is provided on the top of the side wall of the fixed cylinder 31. When the grinding gear is sleeved outside the tire ring 41, one end of the clamp is stably fixed to the clamping base through the connecting inclined surface 11 on the connecting shaft 1, and the other end of the clamp squeezes and fixes the pressing column 34 through the tip. At this time, the pressing column 34 moves along the fixing ring 33 to the inside of the fixing cylinder 31, and squeezes the compression spring 32 to accumulate force for the rebound of the pressing column 34 after the pressure is released. Due to the setting of the sealed space, the squeezed air inside the fixing cylinder 31 gushes out from the upper ventilation groove 36 and the lower ventilation groove 37, thereby pushing the tire ring 41. Since the positions of the two ends of the tire ring 41 are fixed, the middle part of the tire ring 41 swells to complete the fixation of the grinding gear.

[0018] A connecting bevel 11 is provided on the outer wall of the connecting shaft 1, and the inner wall of the connecting shaft 1 is threadedly connected to the outer wall of the threaded rod 2 through an internal thread groove 12, and the internal thread groove 12 is provided in the wall of the connecting shaft 1, and a positioning ring 13 is fixedly connected to the top of the connecting shaft 1, and the top of the threaded rod 2 is fixedly connected to the bottom of the axis of the fixed tube 31, and the inner wall of the limit nut 6 is threadedly connected to the outer wall of the fixing ring 33, and the bottom of the outer wall of the fixing ring 33 is fixedly connected to the outer wall of the top of the fixing tube 31.

[0019] The tire expander 4 includes a tire ring 41, a positioning protrusion 42 is fixedly connected to the bottom of the tire ring 41, an anti-dropping protrusion 43 is fixedly connected to the side wall inside the tire ring 41, and a positioning groove 44 is opened on the outer wall of the top of the tire ring 41. Due to the lack of a taper setting to prevent the tire ring 41 from falling, the two ends of the tire ring 41 are clamped by the cooperation of the positioning ring 13 and the positioning protrusion 42, and the connection protrusion 54 limits the positioning groove 44, thereby maintaining the sealing of the two ends of the tire ring 41, ensuring the sealing of the inside of the tire expander 4 and the ventilation device 3, thereby making the grinding process stable, and at the same time the tire ring 41 The components at both ends are removable. For the anti-slip device 5, rotate to remove the limit nut 6 on the fixing ring 33 and the bolts in the connecting column 53 and the connecting hole 35. At this time, the anti-support plate is detached from the fixing ring 33 through the movable hole 52. At this time, the connecting protrusion 54 is detached from the positioning groove 44, and the tire ring 41 can be detached from the top of the fixing tube 31. For the bottom of the tire ring 41, rotate the connecting shaft 1. At this time, the internal thread groove 12 and the threaded rod 2 rotate relative to each other, and then push out the connecting shaft 1, so that the positioning ring 13 and the positioning protrusion 42 are away from each other, so that the tire ring 41 can be detached from the bottom of the fixing tube 31.

[0020] The anti-slip device 5 comprises an anti-slip plate 51, the axis of the outer wall of the anti-slip plate 51 is provided with a movable hole 52, the bottom of the anti-slip plate 51 is fixedly connected with a connecting column 53, the bottom of the anti-slip plate 51 is fixedly connected with a connecting protrusion 54, the connecting column 53 is fixedly connected to the inner wall of the fixed cylinder 31 by bolts, the outer wall of the connecting protrusion 54 is slidably connected to the outer wall of the positioning groove 44, the side wall inside the tire ring 41 is slidably connected to the outer wall of the fixed cylinder 31, and since the positions of the two ends of the tire ring 41 are fixed, the middle part of the tire ring 41 is bulged to complete the fixation of the grinding gear, the anti-slip device 5 and the tire expansion 4 are set to clamp the grinding gear, an expandable clamp is selected, the grinding gear is clamped by internal expansion, the gap is reduced as much as possible, and a non-tapered tire expansion 4 is selected to reduce the gap between the clamp and the workpiece.

[0021] Working principle:

[0022] When in use, the tire expander 4, the ventilator 3 and the anti-slip device 5 are provided to reduce the clamp between the clamp and the grinding gear. When in use, the tire expander 4 is sleeved on the ventilator 3, and then the anti-slip device 5 is fixed to the fixed tube 31 of the ventilator 3 by bolts and limit nuts 6. At this time, the top of the tire expander 4 is clamped by the connecting protrusion 54 at the bottom of the anti-slip plate 51, and the bottom is clamped by the connecting shaft 1. At the same time, the anti-slip protrusion 43 on the tire ring 41 and the outer wall of the fixed tube 31 are stably fitted to complete the limitation of the tire ring 41. Due to the limited fitting of the tire ring 41, the upper ventilation groove 36 and the lower ventilation groove 37 of the ventilator 3 are blocked from the air outlet position, thereby forming a closed space inside the ventilator 3. When the grinding gear is sleeved outside the tire ring 41, one end of the clamp is stably fixed to the clamping base through the connecting inclined surface 11 on the connecting shaft 1 The pressing column 34 is squeezed and fixed by the top end of the clamp. At this time, the pressing column 34 moves along the fixing ring 33 to the inside of the fixing cylinder 31, and squeezes the compression spring 32 to store force for the rebound of the pressing column 34 after the pressure is released. Due to the setting of the sealed space, the squeezed air inside the fixing cylinder 31 gushes out from the upper ventilation groove 36 and the lower ventilation groove 37, thereby pushing the tire ring 41. Since the positions of the two ends of the tire ring 41 are fixed, the middle part of the tire ring 41 swells to complete the fixation of the grinding gear. By setting the anti-slip device 5 and the tire expansion 4, the grinding gear is clamped. An expandable clamp is selected to clamp the grinding gear by internal expansion to reduce the gap as much as possible. At the same time, a non-tapered tire expansion 4 is selected to reduce the gap between the clamp and the workpiece, thereby making the clamping of the grinding workpiece more stable.

[0023] The clamp is arranged to be disassembled in multiple sections. The setting of the fixing tube 31 on the ventilation device 3 makes it easier for the tire ring 41 to be wrapped on the fixing tube 31. The lack of a taper setting is used to prevent the tire ring 41 from falling off. The two ends of the tire ring 41 are clamped by the cooperation of the positioning ring 13 and the positioning protrusion 42, and the limiting of the positioning groove 44 by the connecting protrusion 54, thereby maintaining the sealing of the two ends of the tire ring 41, ensuring the sealing of the inside of the tire expansion 4 and the ventilation device 3, thereby making the grinding processing stable. At the same time, the components at both ends of the tire ring 41 can be disassembled. For the anti-slip device 5, the limiting nut 6 on the fixing ring 33 and the connecting protrusion 54 are rotated to remove the limiting nut 6 on the fixing ring 33. The connecting column 53 and the bolt in the connecting hole 35, at this time, the anti-support plate is separated from the positioning of the fixing ring 33 through the movable hole 52, and the connecting protrusion 54 is separated from the positioning groove 44, and the tire ring 41 can be separated from the top of the fixing tube 31. As for the bottom of the tire ring 41, the connecting shaft 1 is rotated, and the internal thread groove 12 and the threaded rod 2 rotate relatively, and then the connecting shaft 1 is pushed out, so that the positioning ring 13 and the positioning protrusion 42 are separated from each other, so that the tire ring 41 can be separated from the bottom of the fixing tube 31. By setting the gear grinding fixture, the tire 4 is easier to install, and the tire 4 is clamped more stably, and the edge of the tire 4 is prevented from tilting by fixing the two ends of the tire ring 41.

[0024] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. An expandable gear grinding fixture, characterized in that: include: Connecting shaft (1); A threaded rod (2), the outer wall of the threaded rod (2) being threadedly connected to the inner wall of the connecting shaft (1); A ventilation device (3), the bottom of the ventilation device (3) is fixedly connected to the top of the threaded rod (2); A tire expansion (4), wherein the inner side wall of the tire expansion (4) is slidably connected to the outer wall of the ventilation device (3); An anti-slip device (5), the bottom of which is slidably connected to the top of the tire expansion (4); A limiting nut (6), wherein the inner side wall of the limiting nut (6) is threadedly connected to the outer wall of the ventilation device (3); The ventilation device (3) comprises a fixed cylinder (31), the bottom of the inner wall of the fixed cylinder (31) is fixedly connected to a compression spring (32), a fixed ring (33) is arranged outside the compression spring (32), a pressing column (34) is slidably connected to the side wall inside the fixed ring (33), a connecting hole (35) is provided on the outer wall of the top of the fixed cylinder (31), an upper ventilation groove (36) is provided on the top of the side wall of the fixed cylinder (31), and a lower ventilation groove (37) is provided on the top of the side wall of the fixed cylinder (31).

2. The expandable gear grinding fixture according to claim 1, characterized in that: The outer wall of the connecting shaft (1) is provided with a connecting inclined surface (11), the inner wall of the connecting shaft (1) is threadedly connected to the outer wall of the threaded rod (2) via an internal thread groove (12), and the internal thread groove (12) is provided in the wall of the connecting shaft (1), and a positioning ring (13) is fixedly connected to the top of the connecting shaft (1).

3. The expandable gear grinding fixture according to claim 2, characterized in that: The top of the threaded rod (2) is fixedly connected to the bottom of the axis of the fixed cylinder (31), the inner wall of the limit nut (6) is threadedly connected to the outer wall of the fixed ring (33), and the bottom of the outer wall of the fixed ring (33) is fixedly connected to the outer wall of the top of the fixed cylinder (31).

4. The expandable gear grinding fixture according to claim 1, characterized in that: The tire expansion (4) comprises a tire ring (41), the bottom of the tire ring (41) is fixedly connected with a positioning protrusion (42), the side wall inside the tire ring (41) is fixedly connected with an anti-slip protrusion (43), and the outer wall of the top of the tire ring (41) is provided with a positioning groove (44).

5. The expandable gear grinding fixture according to claim 4, characterized in that: The anti-slip device (5) comprises an anti-slip plate (51), the axis of the outer wall of the anti-slip plate (51) is provided with a movable hole (52), the bottom of the anti-slip plate (51) is fixedly connected to a connecting column (53), and the bottom of the anti-slip plate (51) is fixedly connected to a connecting protrusion (54).

6. The expandable gear grinding fixture according to claim 5, characterized in that: The connecting column (53) is fixedly connected to the inner wall of the fixing cylinder (31) by means of bolts, the outer wall of the connecting protrusion (54) is slidably connected to the outer wall of the positioning groove (44), and the side wall inside the tire ring (41) is slidably connected to the outer wall of the fixing cylinder (31).

Images