Bevel gear lapping clamp and positioning method

Abstract

The invention belongs to the technical field of machining, and discloses a bevel gear lapping fixture and a positioning method.The bevel gear lapping fixture comprises a fixture body, a positioning disc, a positioning mechanism and a gas circuit detection mechanism, the positioning disc is arranged on the fixture body and used for positioning a tooth part of a bevel gear, and a guide column and an expansion sleeve are both arranged on a driving pull rod; the guide column can be inserted into a base body mounting hole of the bevel gear, the inner circumference of the expansion sleeve is attached to the outer circumference of a base body of the bevel gear in the circumferential direction of the positioning disc, and the driving pull rod is movably arranged in the communication hole in the axial direction of the clamp body so that the expansion sleeve can clamp or loosen the base body of the bevel gear. The guide column is arranged on the clamp body and used for detecting the air tightness of the bevel gear, the positioning disc and the clamp body, it is guaranteed that the tooth portion of the bevel gear is precisely positioned by the positioning disc, the pre-positioning of the guide column can effectively prevent the clamp from deviating or not clamping in place, the problem of vertical eccentricity of the bevel gear is solved, clamping and positioning of the bevel gear are achieved, and machining of the bevel gear is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical processing, in particular to a bevel gear grinding fixture and a positioning method. Background Art

[0002] The final drive is a crucial component of the drive axle, consisting of the main bevel assembly, the final drive housing, the differential bearing cover assembly, and the bevel gear differential assembly. The driven bevel gear is a key component in the final drive that reduces speed, increases torque, and changes the direction of transmission force. Its manufacturing quality impacts the quality and service life of the entire axle.

[0003] Gear lapping can improve the roughness of bevel gear meshing surfaces and the contact zone imprint, thereby reducing meshing noise and improving driving comfort. However, bevel gear lapping is typically performed manually, using a vertical mounting method to secure the bevel gears. This vertical mounting method can cause the bevel gears to have an eccentric center of gravity, which can lead to misaligned clamping and inaccurate clamping, resulting in failed bevel gear positioning and affecting machining.

[0004] Therefore, there is an urgent need for a bevel gear lapping fixture and positioning method to solve the above problems. Summary of the Invention

[0005] According to one aspect of the present invention, the bevel gear grinding fixture provided by the present invention effectively prevents the fixture from being clamped off-center or not clamped in place, solves the problem of eccentricity of the vertically installed bevel gear, improves the clamping and positioning accuracy of the bevel gear by the fixture, realizes the clamping and positioning of the bevel gear, and facilitates the processing of the bevel gear.

[0006] In order to solve the above problems existing in the prior art, the present invention adopts the following technical solutions:

[0007] Bevel gear lapping fixture, including:

[0008] A clamp body, wherein the clamp body is provided with a communication hole;

[0009] A positioning plate, which is provided on the fixture body and is used to position the teeth of the bevel gear;

[0010] A positioning mechanism, comprising a driving rod, an expansion sleeve, and a guide post, wherein the guide post and the expansion sleeve are both provided on the driving rod, the guide post being insertable into the base mounting hole of the bevel gear, the inner periphery of the expansion sleeve being in contact with the outer periphery of the base of the bevel gear along the circumferential direction of the positioning plate, and the driving rod being movably provided in the communicating hole along the axial direction of the fixture body so that the expansion sleeve can clamp or release the base of the bevel gear;

[0011] An air path detection mechanism is provided on the fixture body and is used to detect the air tightness between the bevel gear, the positioning plate and the fixture body.

[0012] Preferably, the gas path detection mechanism includes a gas distribution ring and a gas detector, the outer periphery of the gas distribution ring is connected to the fixture body, the inner periphery of the gas distribution ring is slidingly matched with the driving rod, the gas distribution ring is provided with a first gas path, one end of the first gas path is connected to the gas detector, the fixture body is provided with a second gas path, one end of the second gas path is connected to the other end of the first gas path, the air hole at the other end of the second gas path faces the base of the bevel gear, and the gas detector is used to detect the air tightness between the bevel gear and the fixture body.

[0013] Preferably, the positioning plate is provided with a third air path, one end of the third air path is connected to the second air path, and the air hole at the other end of the third air path faces the tooth end face of the bevel gear, and the gas detector is used to detect the air tightness between the bevel gear and the positioning plate.

[0014] Preferably, the bevel gear grinding fixture further comprises a seal, which is clamped between the valve ring and the fixture body, wherein the outer ring of the seal is sealed to the fixture body, and the inner ring of the seal is sealed to the valve ring.

[0015] Preferably, the bevel gear grinding fixture further comprises a floating member, which is floatingly arranged on the positioning plate and can elastically press against the tooth portion of the bevel gear.

[0016] Preferably, the floating member includes a floating portion and an elastic portion, one end of the elastic portion is connected to the positioning plate, and the other end of the elastic portion is connected to the floating portion, and the floating portion can be pressed against the tooth end face of the bevel gear.

[0017] Preferably, a guide surface is provided on the inner periphery of the clamp body, the guide surface is located at the opening of the communicating hole close to the positioning plate, and the guide surface is slidably fitted with the expansion sleeve to enable the expansion sleeve to contract or expand.

[0018] According to another aspect of the present invention, the present invention provides a bevel gear lapping fixture positioning method. Through the implementation of the above-mentioned bevel gear lapping fixture, the bevel gear lapping fixture positioning method includes:

[0019] S100: pushing the bevel gear so that the guide post is inserted into the base of the bevel gear and pre-positioned;

[0020] S200: The positioning plate is sealed and attached to the teeth of the bevel gear, and precise positioning is performed;

[0021] S300: The air path detection mechanism is used to detect the air tightness of the bevel gear, the positioning plate and the fixture body;

[0022] S400: The driving rod drives the expansion sleeve to move axially along the communicating hole and clamp the base of the bevel gear.

[0023] Preferably, the bevel gear lapping fixture positioning method further includes the following steps between S100 and S200:

[0024] S110: The elastic portion is gradually compressed so that the floating portion can elastically press against the teeth of the bevel gear.

[0025] Preferably, S400 in the bevel gear lapping fixture positioning method specifically includes:

[0026] S401: The driving rod is capable of driving the expansion sleeve to move axially along the communicating hole;

[0027] S402: Under the action of the guide surface, the expansion sleeve can be tightened or expanded to clamp or loosen the base of the bevel gear.

[0028] The beneficial effects of the present invention are:

[0029] The bevel gear grinding fixture provided by the present invention has a positioning plate disposed on the fixture body, and a positioning mechanism including a driving rod, an expansion sleeve, and a guide column. The guide column and the expansion sleeve are both disposed on the driving rod, and the bevel gear is pushed to move by an external manipulator propulsion device, so that the guide column can be plugged into the base mounting hole of the bevel gear and pre-positioned, effectively preventing the fixture from being clamped off-center or not clamped in place, solving the problem of eccentricity of the bevel gear when installed vertically, and improving the clamping and positioning accuracy of the bevel gear by the fixture. Then, the positioning plate positions the end face of the tooth portion of the bevel gear, and an air path detection mechanism is disposed on the fixture body. The air path detection mechanism is used to detect the airtightness between the bevel gear, the positioning plate, and the fixture body, to ensure that the positioning plate is precisely positioned on the tooth portion of the bevel gear. Along the circumferential direction of the positioning plate, the inner periphery of the expansion sleeve fits in with the outer periphery of the base portion of the bevel gear, and along the axial direction of the fixture body, the driving rod is movably disposed in the connecting hole. Under the driving action of the driving rod, the expansion sleeve and the guide column are driven to move gradually away from the positioning plate. The expansion sleeve is squeezed and elastically deformed, thereby clamping the base of the bevel gear, and finally achieving the clamping and positioning of the bevel gear. At this time, the fixture is in a clamping state, which is convenient for processing the bevel gear.

[0030] The bevel gear grinding fixture positioning method provided by the present invention pushes the bevel gear so that the guide column is inserted into the base of the bevel gear and pre-positioned, the positioning plate is sealed and fitted with the tooth portion of the bevel gear for precise positioning, and the air path detection mechanism is used to detect the airtightness of the bevel gear, the positioning plate, and the fixture body, and the driving rod drives the expansion sleeve to move axially along the connecting hole and clamp the base of the bevel gear. The guide column can pre-position the bevel gear, solve the problem of eccentricity of the vertical installation of the bevel gear, effectively prevent the fixture from clamping off-center or not clamping in place, and improve the clamping and positioning accuracy of the bevel gear. The air path detection mechanism is used to detect the airtightness between the bevel gear, the positioning plate, and the fixture body, to ensure that the positioning plate is precisely positioned with respect to the tooth portion of the bevel gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A cross-sectional view of a bevel gear lapping fixture provided in Example 1 of the present invention;

[0032] Figure 2 A front view of the clamp body provided in Example 1 of the present invention;

[0033] Figure 3 A cross-sectional view of the clamp body provided in Example 1 of the present invention;

[0034] Figure 4 A cross-sectional view of a positioning plate provided in accordance with the first embodiment of the present invention;

[0035] Figure 5 A front view of the positioning plate provided in the first embodiment of the present invention;

[0036] Figure 6 A cross-sectional view of a driving rod provided in embodiment 1 of the present invention;

[0037] Figure 7 A cross-sectional view of an expansion sleeve provided in Example 1 of the present invention;

[0038] Figure 8 A front view of the expansion sleeve provided in the first embodiment of the present invention;

[0039] Figure 9 A cross-sectional view of a guide post provided in Embodiment 1 of the present invention;

[0040] Figure 10 A front view of a guide post provided in embodiment 1 of the present invention;

[0041] Figure 11 A cross-sectional view of a floating portion provided in Example 1 of the present invention;

[0042] Figure 12 A front view of a floating member provided in embodiment 1 of the present invention;

[0043] Figure 13This is a flow chart of the bevel gear lapping fixture positioning method provided in the second embodiment of the present invention.

[0044] Reference numerals:

[0045] 100, bevel gear; 101, tooth portion; 102, base;

[0046] 1. Clamp body; 11. Connecting hole; 12. Second air path; 13. Guide surface;

[0047] 2. Positioning plate; 21. Third air path;

[0048] 3. Positioning mechanism; 31. Driving rod; 32. Expansion sleeve; 33. Guide column;

[0049] 4. Valve distribution ring; 41. First gas path;

[0050] 5. Seals;

[0051] 6. Floating member; 61. Floating portion; 62. Elastic portion. DETAILED DESCRIPTION

[0052] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0053] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0054] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0055] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0056] like Figures 1-12 As shown, in this embodiment, the bevel gear lapping fixture includes a fixture body 1, a positioning plate 2, a positioning mechanism 3, and an air path detection mechanism. The positioning plate 2 is disposed on the fixture body 1 and is used to position the tooth portion 101 of the bevel gear 100. The positioning mechanism 3 includes a drive rod 31, an expansion sleeve 32, and a guide post 33. The guide post 33 and the expansion sleeve 32 are both disposed on the drive rod 31. The guide post 33 can be inserted into the mounting hole of the base 102 of the bevel gear 100. Along the circumferential direction of the positioning plate 2, the inner periphery of the expansion sleeve 32 is in contact with the outer periphery of the base 102 of the bevel gear 100. Along the axial direction of the fixture body 1, the drive rod 31 is movably disposed in the connecting hole 11 so that the expansion sleeve 32 can clamp or loosen the base 102 of the bevel gear 100. The air path detection mechanism is disposed on the fixture body 1 and is used to detect the airtightness between the bevel gear 100, the positioning plate 2, and the fixture body 1.

[0057] The positioning plate 2 is fixedly mounted to the outer periphery of one end of the clamp body 1 by bolts. The driving rod 31 is configured to be hydraulically driven and slides through the connecting hole 11 of the clamp body 1. An expansion sleeve 32 and a guide post 33 are installed at one end of the driving rod 31. The guide post 33 is fixedly mounted on the driving rod 31 via a positioning seat, and the expansion sleeve 32 is fixedly engaged with the outer peripheral wall of one end of the driving rod 31. Along the circumferential direction of the driving rod 31, there is an installation gap between the inner periphery of the expansion sleeve 32 and the outer periphery of the guide post 33. The installation gap is used to fix the base 102 of the bevel gear 100. The guide post 33 is inserted into the mounting hole of the base 102 of the bevel gear 100 and is used for positioning, effectively preventing the clamp from being clamped off-center or not clamped in place, which would affect the clamping efficiency and improve the clamping and positioning accuracy of the bevel gear 100. The longitudinal cross-section of the positioning disk 2 adopts a large arc concave structure, so that the grinding fluid can gather on the positioning disk 2 and be centrifugally separated as the fixture rotates, preventing the positioning disk 2 from being contaminated and ensuring the quality stability of the gear grinding process. The air path detection mechanism detects whether there is gas in the gap between the bevel gear 100, the positioning disk 2 and the fixture body 1 to check whether the air tightness between the bevel gear 100 and the fixture is good. The expansion sleeve 32 is a positioning and clamping element, the inner conical surface of which matches the taper of the base 102 of the bevel gear 100, and the outer cylindrical surface is provided with an elastic part to achieve radial expansion. During operation, the expansion sleeve 32 is uniformly elastically deformed by the axial pressing force, ensuring the positioning accuracy and transmission stability of the bevel gear 100 during the grinding process.

[0058] The working process of the bevel gear lapping fixture is as follows: First, the bevel gear 100 is pushed by an external manipulator propulsion device, so that the guide column 33 can be inserted into the mounting hole of the base 102 of the bevel gear 100 and pre-positioned, thereby solving the problem of eccentricity of the bevel gear 100 when installed vertically. Then, the positioning disk 2 positions the end face of the tooth portion 101 of the bevel gear 100 to ensure the stability of the lapping process quality. In addition, the air path detection mechanism is used to detect the airtightness between the bevel gear 100, the positioning disk 2 and the fixture body 1 to ensure that the positioning disk 2 accurately positions the tooth portion 101 of the bevel gear 100. Then, under the driving action of the drive pull rod 31, the expansion sleeve 32 and the guide column 33 are driven to move gradually away from the positioning disk 2. The expansion sleeve 32 is squeezed and elastically deformed, thereby clamping the base 102 of the bevel gear 100, and finally achieving the clamping and positioning of the bevel gear 100. At this time, the fixture is in a clamped state, which facilitates the processing of the bevel gear 100. Similarly, under the driving action of the driving rod 31, the expansion sleeve 32 and the guide column 33 are driven to move in a direction gradually approaching the positioning plate 2, and the expansion sleeve 32 returns to its original state through elastic deformation, thereby loosening the base 102 of the bevel gear 100, while the guide column 33 can maintain the guiding positioning of the base 102 of the bevel gear 100.

[0059] Reference Figure 1The gas path detection mechanism includes a gas distribution ring 4 and a gas detector. The outer periphery of the gas distribution ring 4 is connected to the fixture body 1, and the inner periphery of the gas distribution ring 4 is in sliding cooperation with the drive rod 31. The gas distribution ring 4 is provided with a first gas path 41, and one end of the first gas path 41 is connected to the gas detector. The fixture body 1 is provided with a second gas path 12, and one end of the second gas path 12 is connected to the other end of the first gas path 41. The air hole at the other end of the second gas path 12 faces the base 102 of the bevel gear 100. The gas detector is used to detect the air tightness between the bevel gear 100 and the fixture body 1. A gas detector is an electronic device used to detect the concentration of a specific gas (such as combustible gas, toxic gas or oxygen) in the environment. It converts the gas concentration into an electrical signal through a built-in sensor and displays it as a readable numerical value. Its core function is to monitor gas leaks or abnormal concentrations in real time. When the detection value exceeds the preset safety threshold, an audible and visual alarm is triggered. It is widely used in industrial safety, environmental monitoring and other fields, especially in the field of confined space operations where sealing needs to be detected. The gas distribution ring 4 is a key mechanical component used to control the distribution and flow of fluids (gas or liquids). Its core function is to open or close the flow channel at a specific position through precisely designed channels or grooves to achieve timed, directional delivery or pressure regulation of the medium. The gas distribution ring 4 is mostly made of wear-resistant alloy and has high dimensional accuracy and sealing. Gas is introduced into the first air path 41 of the gas distribution ring 4 through the vent pipe, and the gas flows to the second air path 12 of the fixture body 1. Then, the ventilation is stopped, and a gas detector is used to detect the air pressure changes in the first air path 41 and the second air path 12 in real time. If the air pressure value does not change, it indicates that the air tightness between the bevel gear 100 and the fixture body 1 is good, and the fixture body 1 accurately positions the base 102 of the bevel gear 100.

[0060] Continue to refer to Figure 1 The positioning disk 2 is provided with a third air path 21, one end of which is connected to the second air path 12, and the air hole at the other end of the third air path 21 faces the end face of the tooth portion 101 of the bevel gear 100. The gas detector is used to detect the air tightness between the bevel gear 100 and the positioning disk 2. Gas is introduced into the first air path 41 of the distribution ring 4 through the vent pipe, and the gas flows to the second air path 12 of the fixture body 1 and the third air path 21 of the positioning disk 2. Then, the ventilation is stopped, and the gas detector is used to detect the air pressure changes in the first air path 41, the second air path 12, and the third air path 21 in real time. If the air pressure value does not change, it indicates that the air tightness between the bevel gear 100 and the positioning disk 2 is good, and the positioning disk 2 accurately positions the end face of the tooth portion 101 of the bevel gear 100.

[0061] The positioning disk 2 is described as having a large arc structure. The disk surface is designed as a continuous smooth curved surface that is significantly convex. During the rotation process, the grinding liquid is efficiently guided by the synergistic effect of centrifugal force and gravity. When the grinding liquid splashes onto the surface of the positioning disk 2, it is guided by the large arc curved surface and quickly converges to the lowest point. At the same time, under the action of the centrifugal acceleration generated by the high-speed rotation, the liquid is thrown away from the disk body along the tangential direction to avoid secondary splashing or residue. Compared with the traditional flat positioning disk, this can reduce the retention of grinding liquid by more than 90%, and effectively prevent the positioning surface wear or gear clamping deviation caused by the accumulation of abrasive particles. Continue to refer to Figure 1 The bevel gear lapping fixture further includes a seal 5, which is interposed between the gas distribution ring 4 and the fixture body 1. The outer ring of the seal 5 is sealed to the fixture body 1, and the inner ring of the seal 5 is sealed to the gas distribution ring 4. The seal 5 is configured as a sealing ring, and the gas distribution ring 4 is sealed and fixed to the fixture body 1 via the seal 5, ensuring that gas in the first gas path 41 and the second gas path 12 does not leak out. At the same time, it ensures that external air cannot enter between the fixture body 1 and the gas distribution ring 4 and affect the airtightness detection.

[0062] Continue to refer to Figure 1 The bevel gear lapping fixture further includes a floating member 6 , which is floatingly disposed on the positioning plate 2 and can elastically press against the tooth portion 101 of the bevel gear 100 . The floating member 6 includes a floating portion 61 and an elastic portion 62 . One end of the elastic portion 62 is connected to the positioning plate 2 , and the other end of the elastic portion 62 is connected to the floating portion 61 . The floating portion 61 can press against the end face of the tooth portion 101 of the bevel gear 100 . The elastic part 62 is set as a spring, and the floating part 61 is set as a pressing ring. The bevel gear 100 is pushed to move by an external manipulator propulsion device, so that the guide column 33 can be inserted into the mounting hole of the base 102 of the bevel gear 100 and pre-positioned. When the bevel gear 100 moves, the bevel gear 100 fits with the floating part 61, and the elastic part 62 is gradually compressed, so that the floating part 61 elastically abuts against the end face of the tooth portion 101 of the bevel gear 100, so that a seal is formed between the floating part 6 and the tooth portion 101 of the bevel gear 100, preventing the grinding fluid from splashing and contaminating the clamping positioning surface of the fixture. There is no need to manually clean the grinding fluid of the fixture, thereby ensuring the quality stability of the gear grinding process.

[0063] Continue to refer to Figure 1The inner circumference of the clamp body 1 is provided with a guide surface 13. The guide surface 13 is located near the opening of the connecting hole 11 near the positioning plate 2. The guide surface 13 slides in contact with the expansion sleeve 32 to enable the expansion sleeve 32 to contract or expand. A wedge-shaped guide surface 13 is provided on the inner circumference of one end of the clamp body 1. The guide surface 13 is a tapered structure from the end of the connecting hole 11 near the positioning plate 2 to the end away from the positioning plate 2. Driven by the driving rod 31, the expansion sleeve 32 and the guide post 33 are driven to move gradually away from the positioning plate 2. The expansion sleeve 32 is squeezed by the guide surface 13 and elastically deforms, thereby clamping the base 102 of the bevel gear 100, ultimately achieving the clamping and positioning of the bevel gear 100.

[0064] Example 2

[0065] like Figure 13 As shown, this embodiment provides a bevel gear lapping fixture positioning method. Through the implementation of the above-mentioned bevel gear lapping fixture, the bevel gear lapping fixture positioning method includes:

[0066] S100 : Push the bevel gear 100 so that the guide post 33 is inserted into the base 102 of the bevel gear 100 and pre-positioned.

[0067] The positioning mechanism 3 includes a driving rod 31, an expansion sleeve 32, and a guide post 33. The guide post 33 and the expansion sleeve 32 are both arranged on the driving rod 31. The guide post 33 can be inserted into the mounting hole of the base 102 of the bevel gear 100. Along the circumferential direction of the positioning plate 2, the inner periphery of the expansion sleeve 32 is in contact with the outer periphery of the base 102 of the bevel gear 100. Along the axial direction of the clamp body 1, the driving rod 31 is movably arranged in the connecting hole 11. The bevel gear 100 is pushed to move by an external manipulator propulsion device, so that the guide post 33 can be inserted into the mounting hole of the base 102 of the bevel gear 100 and pre-positioned, thereby solving the problem of eccentricity of the vertical installation of the bevel gear 100, effectively preventing the clamp from being clamped off-center or not clamped in place, affecting the clamping efficiency, and improving the clamping and positioning accuracy of the bevel gear 100.

[0068] S110 : The elastic portion 62 is gradually compressed, so that the floating portion 61 can elastically press against the tooth portion 101 of the bevel gear 100 .

[0069] The floating member 6 includes a floating portion 61 and an elastic portion 62. One end of the elastic portion 62 is connected to the positioning plate 2, and the other end of the elastic portion 62 is connected to the floating portion 61. The floating portion 61 can be tightly pressed against the end face of the tooth portion 101 of the bevel gear 100. As the bevel gear 100 moves, the bevel gear 100 fits against the floating portion 61. Moreover, the elastic portion 62 is gradually compressed, causing the floating portion 61 to elastically abut against the end face of the tooth portion 101 of the bevel gear 100. This forms a seal between the floating member 6 and the tooth portion 101 of the bevel gear 100, preventing the grinding fluid from splashing and contaminating the clamping positioning surface of the fixture. This eliminates the need for manual cleaning of the grinding fluid in the fixture, ensuring the quality and stability of the gear lapping process.

[0070] S200: The positioning disc 2 is sealed and attached to the tooth portion 101 of the bevel gear 100 and fine positioning is performed.

[0071] The positioning plate 2 is fixed to the outer periphery of one end of the fixture body 1 by bolts. The longitudinal section of the positioning plate 2 adopts a large arc concave structure, so that the grinding fluid can gather on the positioning plate 2 and be centrifuged and separated as the fixture rotates, preventing the positioning plate 2 from being contaminated and ensuring the quality stability of the gear grinding process.

[0072] S300: The air path detection mechanism is used to detect the air tightness between the bevel gear 100, the positioning plate 2 and the fixture body 1.

[0073] The gas path detection mechanism includes a gas distribution ring 4 and a gas detector. The outer periphery of the gas distribution ring 4 is connected to the fixture body 1, and the inner periphery of the gas distribution ring 4 is in sliding engagement with the drive rod 31. The gas distribution ring 4 is provided with a first gas path 41, one end of which is connected to the gas detector. The fixture body 1 is provided with a second gas path 12, one end of which is connected to the other end of the first gas path 41, and the air hole at the other end of the second gas path 12 faces the base 102 of the bevel gear 100. The positioning plate 2 is provided with a third gas path 21, one end of which is connected to the second gas path 12, and the air hole at the other end of the third gas path 21 faces the end face of the tooth portion 101 of the bevel gear 100. The gas detector is used to detect the airtightness between the bevel gear 100 and the fixture body 1 and the positioning plate 2. If the air pressure value does not change, it indicates that the air tightness between the bevel gear 100 and the fixture body 1 is good, the air tightness between the bevel gear 100 and the positioning plate 2 is good, the fixture body 1 accurately positions the base 102 of the bevel gear 100, and the positioning plate 2 accurately positions the end face of the tooth portion 101 of the bevel gear 100.

[0074] S400 : The driving rod 31 drives the expansion sleeve 32 to move along the axial direction of the communicating hole 11 and clamp the base 102 of the bevel gear 100 .

[0075] S400 specifically includes:

[0076] S401 : The driving rod 31 can drive the expansion sleeve 32 to move along the axial direction of the communicating hole 11 .

[0077] Along the axial direction of the clamp body 1 , the driving rod 31 is movably provided in the communicating hole 11 . Under the driving action of the driving rod 31 , the expansion sleeve 32 and the guide post 33 are driven to move in a direction gradually away from the positioning plate 2 .

[0078] S402 : Under the action of the guide surface 13 , the expansion sleeve 32 can be tightened or expanded to clamp or loosen the base 102 of the bevel gear 100 .

[0079] A guide surface 13 is provided on the inner circumference of the fixture body 1. This surface is located near the opening of the connecting hole 11 near the positioning plate 2. The guide surface 13 slidably engages the expansion sleeve 32, enabling the expansion sleeve 32 to retract. Driven by the drive rod 31, the expansion sleeve 32 and the guide post 33 gradually move away from the positioning plate 2. The expansion sleeve 32 is squeezed by the guide surface 13, causing it to elastically deform, thereby clamping the base 102 of the bevel gear 100, ultimately clamping and positioning the bevel gear 100.

[0080] The bevel gear lapping fixture positioning method provided in this embodiment, through the implementation of the bevel gear lapping fixture, pushes the bevel gear 100 so that the guide column 33 is inserted into the base 102 of the bevel gear 100 and pre-positioned, and the positioning plate 2 is sealed and attached to the tooth portion 101 of the bevel gear 100 for precise positioning. The air path detection mechanism is used to detect the airtightness between the bevel gear 100, the positioning plate 2, and the fixture body 1. The driving rod 31 drives the expansion sleeve 32 to move axially along the connecting hole 11 and clamp the base 102 of the bevel gear 100. The guide column 33 can pre-position the bevel gear 100, solving the problem of eccentricity of the bevel gear 100 when installed vertically, effectively preventing the fixture from clamping off-center or not clamping in place, and improving the clamping and positioning accuracy of the bevel gear 100. The air path detection mechanism is used to detect the airtightness between the bevel gear 100, the positioning plate 2, and the fixture body 1, ensuring that the positioning plate 2 is precisely positioned with respect to the tooth portion 101 of the bevel gear 100.

[0081] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Bevel gear grinding fixture, characterized in that: include: A clamp body (1), wherein the clamp body (1) is provided with a communication hole (11); A positioning disc (2), the positioning disc (2) being arranged on the fixture body (1) and used for positioning the tooth portion (101) of the bevel gear (100); A positioning mechanism (3), the positioning mechanism (3) comprising a driving rod (31), an expansion sleeve (32) and a guide column (33), the guide column (33) and the expansion sleeve (32) being both arranged on the driving rod (31), the guide column (33) being capable of being inserted into the mounting hole of the base (102) of the bevel gear (100), the inner periphery of the expansion sleeve (32) being in contact with the outer periphery of the base (102) of the bevel gear (100) along the circumferential direction of the positioning disk (2), and the driving rod (31) being movably arranged in the connecting hole (11) along the axial direction of the clamp body (1), so that the expansion sleeve (32) can clamp or release the base (102) of the bevel gear (100); An air path detection mechanism is provided on the fixture body (1) and is used to detect the air tightness of the bevel gear (100), the positioning plate (2) and the fixture body (1).

2. The bevel gear lapping fixture according to claim 1, characterized in that: The gas path detection mechanism includes a gas distribution ring (4) and a gas detector, the outer periphery of the gas distribution ring (4) is connected to the clamp body (1), the inner periphery of the gas distribution ring (4) is slidably matched with the driving pull rod (31), the gas distribution ring (4) is provided with a first gas path (41), one end of the first gas path (41) is connected to the gas detector, the clamp body (1) is provided with a second gas path (12), one end of the second gas path (12) is connected to the other end of the first gas path (41), the air hole at the other end of the second gas path (12) faces the base (102) of the bevel gear (100), and the gas detector is used to detect the air tightness between the bevel gear (100) and the clamp body (1).

3. The bevel gear lapping fixture according to claim 2, characterized in that: The positioning disk (2) is provided with a third gas path (21), one end of the third gas path (21) is connected to the second gas path (12), and the air hole at the other end of the third gas path (21) faces the end face of the tooth portion (101) of the bevel gear (100). The gas detector is used to detect the air tightness between the bevel gear (100) and the positioning disk (2).

4. The bevel gear lapping fixture according to claim 2, characterized in that: The bevel gear grinding fixture further comprises a sealing member (5), wherein the sealing member (5) is sandwiched between the valve ring (4) and the fixture body (1), wherein the outer ring of the sealing member (5) is sealedly connected to the fixture body (1), and the inner ring of the sealing member (5) is sealedly connected to the valve ring (4).

5. The bevel gear lapping fixture according to claim 1, characterized in that: The bevel gear grinding fixture further comprises a floating member (6), wherein the floating member (6) is arranged in a floating manner on the positioning plate (2), and the floating member (6) can elastically press against the tooth portion (101) of the bevel gear (100).

6. The bevel gear lapping fixture according to claim 5, characterized in that: The floating member (6) comprises a floating portion (61) and an elastic portion (62), one end of the elastic portion (62) is connected to the positioning plate (2), and the other end of the elastic portion (62) is connected to the floating portion (61), and the floating portion (61) can be tightly pressed against the end face of the tooth portion (101) of the bevel gear (100).

7. The bevel gear lapping fixture according to claim 1, characterized in that: A guide surface (13) is provided on the inner periphery of the clamp body (1), and the guide surface (13) is located at the opening of the connecting hole (11) close to the positioning plate (2), and the guide surface (13) is slidably fitted with the expansion sleeve (32) to enable the expansion sleeve (32) to contract or expand.

8. Bevel gear lapping fixture positioning method, characterized in that, By implementing the bevel gear lapping fixture according to claims 1 to 7, the bevel gear lapping fixture positioning method includes: S100: pushing the bevel gear (100) so that the guide column (33) is inserted into the base (102) of the bevel gear (100) and pre-positioned; S200: The positioning disc (2) is sealed and attached to the tooth portion (101) of the bevel gear (100) and precisely positioned; S300: The air path detection mechanism is used to detect the air tightness of the bevel gear (100), the positioning plate (2), and the fixture body (1); S400: The driving pull rod (31) drives the expansion sleeve (32) to move along the axial direction of the connecting hole (11) and clamp the base (102) of the bevel gear (100).

9. The bevel gear lapping fixture positioning method according to claim 8, characterized in that: The bevel gear lapping fixture further comprises a floating member (6), the floating member (6) comprising a floating portion (61) and an elastic portion (62), one end of the elastic portion (62) being connected to the positioning plate (2), and the other end of the elastic portion (62) being connected to the floating portion (61); The bevel gear lapping fixture positioning method further includes the following steps located between S100 and S200: S110: The elastic portion (62) is gradually compressed, so that the floating portion (61) can elastically press against the tooth portion (101) of the bevel gear (100).

10. The bevel gear lapping fixture positioning method according to claim 8, characterized in that: A guide surface (13) is provided on the inner periphery of the clamp body (1), the guide surface (13) is in sliding contact with the expansion sleeve (32), the guide surface (13) is located at the opening of the communicating hole (11) close to the positioning plate (2), and is used to enable the expansion sleeve (32) to contract or expand; The bevel gear lapping fixture positioning method S400 specifically includes: S401: The driving rod (31) is capable of driving the expansion sleeve (32) to move axially along the communicating hole (11); S402: Under the action of the guide surface (13), the expansion sleeve (32) can be tightened or expanded to clamp or loosen the base (102) of the bevel gear (100).

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