Auxiliary testing fixture for measuring and calibrating gear

Abstract

The utility model relates to the technical field of gauges, in particular to a gear measurement and calibration auxiliary gauge, which comprises a base, a placement table and a micrometer, the placement table is connected to the upper end of the base, the upper end of the placement table is provided with a caulking groove, the caulking groove is used for placing a to-be-measured gear, the groove wall of the caulking groove is provided with a communication groove, the communication groove is communicated with the caulking groove and the outside, and the axis of the communication groove and the axis of the caulking groove are coplanar. The number of the communicating grooves is two, the two communicating grooves are symmetrically distributed along the axes of the communicating grooves, the micrometer comprises an installation frame, a micrometric screw and a measuring anvil, the supporting frame is connected to the base, the micrometric screw and the measuring anvil are connected to the supporting frame, and the micrometric screw and the measuring anvil penetrate through the two communicating grooves respectively and then stretch into the caulking groove to be used for detecting the outer diameter of the gear to be detected. The gear to be detected is placed in the caulking groove, and the micrometric screw and the measuring anvil penetrate through the communication groove and then extend into the caulking groove for detection, so that the excircle of the gear to be detected can be conveniently detected, the labor intensity of workers is reduced, the possibility of errors of detection data caused by low price of the micrometric screw and the measuring anvil is reduced, and the detection precision of equipment is improved.

Description

Technical Field

[0001] This application relates to the technical field of gauges, and in particular to an auxiliary gauge for gear measurement and calibration. Background Technology

[0002] In the field of machinery manufacturing, gears, as crucial transmission components, are widely used in various types of mechanical equipment. With the continuous advancement of industrial technology, the requirements for gear precision and quality are also increasing. High-precision gears ensure the stable and efficient operation of mechanical equipment, reduce the probability of malfunctions, extend equipment lifespan, and thus improve the reliability and production efficiency of the entire production system. Especially in high-end equipment manufacturing and aerospace fields, gear precision directly affects product performance and safety. Therefore, accurately detecting various gear parameters is crucial for ensuring gear quality.

[0003] Currently, ordinary outside micrometers are often used to measure the outer diameter of gears. However, when encountering gears with large outer diameters, the inspection operation becomes difficult and prone to large measurement errors. Utility Model Content

[0004] To facilitate the inspection of the outer diameter of gears and improve the accuracy of the inspection, this application provides an auxiliary tool for gear measurement and calibration.

[0005] The gear measurement and calibration auxiliary fixture provided in this application adopts the following technical solution:

[0006] A gear measurement and calibration auxiliary tool includes a base, a placement platform, and a micrometer. The placement platform is connected to the upper end of the base. The upper end of the placement platform has a groove for placing the gear to be measured. The groove wall has a connecting groove that connects the groove to the outside. The connecting groove axis is coplanar with the groove axis. There are two connecting grooves, which are symmetrically distributed along the connecting groove axis. The micrometer includes a mounting frame, a micrometer screw, and a measuring anvil. The support frame is connected to the base. The micrometer screw and the measuring anvil are connected to the support frame. The micrometer screw and the measuring anvil pass through the two connecting grooves and extend into the groove to measure the outer diameter of the gear to be measured.

[0007] By adopting the above technical solution, the gear to be tested is placed in the groove, and the micrometer screw and anvil are inserted into the groove through the connecting groove for testing. This facilitates the testing of the outer diameter of the gear to be tested, reduces the labor intensity of the staff, reduces the possibility of errors in the test data caused by the small size of the micrometer screw and anvil, and improves the testing accuracy of the equipment.

[0008] Preferably, the placement platform is provided with a plurality of first fixing holes at one end near the base, the plurality of first fixing holes being circumferentially distributed around the axis of the placement platform, and the base is provided with a first connecting hole, the first connecting hole being used for bolts to pass through and be threadedly connected to the first fixing holes.

[0009] By adopting the above technical solution, the placement platform and the base can be detachably connected, which facilitates the maintenance or replacement of the placement platform with a different size after it is removed, thereby improving the service life and applicability of the inspection tool.

[0010] Preferably, it also includes a slider, which is slidably connected to the base. The sliding direction of the slider is perpendicular to the axis of the connecting groove. There are two sliders, which are symmetrically distributed along the sliding direction of the slider. The lower end of the placement platform is provided with a limiting groove. The number of limiting grooves is the same as the number of sliders and corresponds one-to-one. The limiting groove is used for the slider to be embedded. The groove wall of the limiting groove is in contact with the side wall of the slider.

[0011] By adopting the above technical solution, a slider is set up. The slider slides to a suitable position and is embedded in the limiting groove to achieve the initial fixation of the placement platform and the base. This facilitates the subsequent fixed connection of the placement platform and the base with bolts, and improves the convenience of inspection tool assembly.

[0012] Preferably, the groove is connected to the limiting groove, and the slider is provided with a V-shaped groove on the side near the axis of the placement platform. The wall of the V-shaped groove is used to abut against the outer wall of the gear to be tested.

[0013] By adopting the above technical solution, the slider is provided with a V-shaped groove. When there is a gap between the outer wall of the gear to be tested and the groove wall, the sliding slider makes the groove wall of the V-shaped groove abut against the outer wall of the gear to be tested, thereby achieving relative fixation between the gear to be tested and the base, meeting the testing needs of gears of different diameters and improving the applicability of the inspection tool.

[0014] Preferably, it further includes a transmission gear and a transmission rack, wherein the number of transmission racks is the same as the number of sliders and corresponds one-to-one, one end of the transmission rack is connected to the slider, the transmission gear is rotatably connected to the base, the rotation axis of the transmission gear is parallel to the axial direction of the placement platform, and the transmission gear meshes with the transmission rack.

[0015] By adopting the above technical solution, pushing any slider to slide will cause the transmission rack to slide. Both transmission racks are engaged with the transmission gear, causing the other transmission rack to slide, which in turn causes the other slider to slide. This makes the axis of the gear to be tested coincide with the axis of the placement stage, reducing the possibility of errors in the detection data caused by the micrometer screw and anvil, and improving the detection accuracy of the equipment.

[0016] Preferably, the device further includes a lead screw and a handwheel. One end of the lead screw is rotatably connected to any slider, the axis of rotation of the lead screw is parallel to the sliding direction of the slider, the lead screw is threadedly connected to the base, and the handwheel is connected to the other end of the lead screw.

[0017] By adopting the above technical solution, the screw is rotated by a handwheel, and the screw and the base are threaded together, thereby adjusting the position of the slider.

[0018] Preferably, the base further includes a fixed seat, a rotating seat, and a first reset member. The fixed seat is connected to the base, and the fixed seat has a rotating groove on the side near the lead screw for the lead screw to pass through. The rotating seat is rotatably connected to the base, and the rotation axis of the rotating seat is parallel to the rotation axis of the lead screw. The rotating seat has a concave arc groove on the side near the lead screw for threaded connection of the lead screw. The first reset member is connected between the rotating seat and the base, and the first reset member makes the rotating seat tend to abut against the outer wall of the lead screw.

[0019] By adopting the above technical solution, the rotating seat is driven to overcome the elastic force of the first reset member and rotate away from the lead screw. By holding the handle and pushing and pulling the lead screw, the slider is driven to slide to a suitable position. When the rotating seat is released, the rotating seat moves closer to the lead screw under the lifting action of the first reset member, so that the lead screw is connected to the concave arc groove thread. Then, the handwheel drives the lead screw to rotate to realize the fine adjustment of the slider position, and the slider position can be quickly adjusted.

[0020] Preferably, the base further includes a locking block, the fixed seat is provided with a first locking groove, the rotating seat is provided with a second locking groove, and the locking block is used to simultaneously embed into the first locking groove and the second locking groove. When the locking block is simultaneously embedded into the first locking groove and the second locking groove, the rotating seat is threadedly connected to the lead screw.

[0021] By adopting the above technical solution, the card block is embedded in the card slot, which improves the stability of maintaining relative fixation between the rotating seat and the fixed seat, and ensures the stability of the threaded connection between the rotating seat and the lead screw.

[0022] Preferably, the outer wall of the placement platform is provided with an abutment surface, which is perpendicular to the axis of the connecting groove, and the abutment surface is used to abut against the mounting bracket.

[0023] By adopting the above technical solution, the contact surface abuts against the mounting frame, which can achieve precise positioning of the placement platform and the mounting frame, thereby ensuring that the micrometer screw and the anvil accurately pass through the connecting groove and extend into the slot to detect the outer diameter of the gear to be tested, thus improving the accuracy of the test.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. Place the gear to be tested in the groove, and insert the micrometer screw and anvil into the groove after passing through the connecting groove for testing. This facilitates the testing of the outer diameter of the gear, reduces the labor intensity of the staff, reduces the possibility of errors in the test data caused by the small size of the micrometer screw and anvil, and improves the testing accuracy of the equipment.

[0026] 2. Set the slider. Slide the slider to the appropriate position and embed it into the limiting groove to achieve the initial fixation of the placement platform and the base. This facilitates the subsequent fixed connection of the placement platform and the base with bolts, improving the convenience of fixture assembly.

[0027] 3. The contact surface abuts against the mounting bracket, enabling precise positioning of the placement platform and the mounting bracket. This ensures that the micrometer screw and anvil accurately pass through the connecting groove and extend into the slot to detect the outer diameter of the gear under test, thus improving the accuracy of the test. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of an auxiliary gauge for gear measurement and calibration.

[0029] Figure 2 This is a cross-sectional view of an auxiliary tool for gear measurement and calibration.

[0030] Figure 3 This is a partial sectional view of the gear measurement and calibration auxiliary fixture, mainly showing the limiting mechanism.

[0031] Figure 4 yes Figure 1 Enlarged view of point A in the middle.

[0032] Figure 5 This is a partial sectional view of the gear measurement and calibration auxiliary fixture, mainly showing the fixed base, rotating base, and clamping block.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Base; 11. Mounting plate; 111. First connecting hole; 112. Receiving groove; 113. Guide groove; 114. Second connecting hole; 12. Fixed seat; 121. Rotating groove; 122. First slot; 123. Groove; 13. Rotating seat; 131. Concave arc groove; 132. Second slot; 133. Protrusion; 14. First reset component; 15. Locking block; 151. Connecting section; 152. Embedding section; 16. Support block;

[0035] 2. Placement platform; 21. Embedded groove; 22. Connecting groove; 23. First fixing hole; 24. Limiting groove; 25. Abutting surface; 26. Connecting hole;

[0036] 3. Micrometer; 31. Mounting bracket; 311. Connecting seat; 3111. Slide groove; 3112. Adjustment groove; 312. Fixing bolt; 313. First support base; 3131. Second fixing hole; 3132. First mounting hole; 314. Second support base; 3141. Third fixing hole; 3142. Second mounting hole; 32. Micrometer screw; 33. Anvil;

[0037] 4. Limiting mechanism; 41. Slider; 411. V-groove; 42. Transmission gear; 43. Transmission rack; 44. Lead screw; 45. Handwheel; 46. Connecting block. Detailed Implementation

[0038] The present application will be further described in detail below with reference to the accompanying drawings.

[0039] Reference Figure 1 This application discloses a gear measurement and calibration auxiliary fixture including a base 1. The base 1 includes a mounting plate 11 and support blocks 16. One end of each support block 16 is fixedly connected to one side surface of the mounting plate 11 along the sliding direction of the mounting plate 11. Several support blocks 16 are provided, and the support blocks 16 are distributed at intervals along the circumference of the mounting plate 11. In this embodiment, four support blocks 16 are provided, and the four support blocks 16 are distributed at the four corners of the mounting plate 11.

[0040] Reference Figure 1 and Figure 2 A gear measurement and calibration auxiliary fixture also includes a placement platform 2. One end of the placement platform 2 is fixedly connected to the surface of the mounting plate 11 away from the support block 16, and the placement platform 2 is located on one side of the mounting plate 11 along its length. A groove 21 is coaxially provided at the end of the placement platform 2 away from the mounting plate 11, for placing the gear to be measured. A connecting hole 26 is coaxially provided at the bottom of the groove 21, and the connecting hole 26 penetrates the placement platform 2 along its axis. A first fixing hole 23 is provided at the end of the placement platform 2 near the mounting plate 11. Several first fixing holes 23 are provided, and they are circumferentially spaced around the axis of the placement platform 2. In this embodiment, two first fixing holes 23 are provided, symmetrically distributed along the width direction of the mounting plate 11, and the axes of the two first fixing holes 23 are coplanar with the axis of the placement platform 2. Mounting plate 11 is provided with a first connecting hole 111, which penetrates the mounting plate 11 along its thickness direction. The first connecting hole 111 is used for a bolt to pass through and threadedly connect to a first fixing hole 23. There are several first connecting holes 111, divided into two groups, each group corresponding to two first fixing holes 23. The first connecting holes 111 in each group are spaced apart along the width direction of the mounting plate 11. In this embodiment, all first connecting holes 111 in the same group are interconnected.

[0041] A gear measurement and calibration auxiliary tool also includes a micrometer 3. The micrometer 3 includes a mounting frame 31, a micrometer screw 32, and a measuring anvil 33. The mounting frame 31 includes a connecting seat 311, a fixing bolt 312, a first support seat 313, and a second support seat 314. The connecting seat 311 is fixedly connected to the side surface of the mounting plate 11 near the placement platform 2. The connecting seat 311 is located on one side of the placement platform 2 along the length direction of the mounting plate 11. The side of the connecting seat 311 near the placement platform 2 is provided with a sliding groove 3111. One end of the first support seat 313 and the second support seat 314 is slidably embedded in the sliding groove 3111. The sliding direction of the first support seat 313 and the second support seat 314 is parallel to the width direction of the mounting plate 11. An adjusting groove 3112 is provided on the side wall of the slide groove 3111 away from the mounting plate 11. The adjusting groove 3112 is connected to the outside. A second fixing hole 3131 is provided on the side of the first support seat 313 away from the mounting plate 11, and a third fixing hole 3141 is provided on the side of the second support seat 314 away from the mounting plate 11. The number of fixing bolts 312 is the same as the sum of the number of the second fixing holes 3131 and the third fixing holes 3141, and they correspond one-to-one. The fixing bolts 312 pass through the adjusting groove 3112 and are threaded into the second fixing hole 3131 or the third fixing hole 3141. The head of the fixing bolt 312 abuts against the surface of the connecting seat 311 away from the mounting plate 11. The first support base 313 and the second support base 314 are located on both sides of the placement platform 2 along the width direction of the mounting plate 11. The outer wall of the placement platform 2 has an abutment surface 25, which is perpendicular to the width direction of the mounting plate 11 and is used to abut against the end of the first support base 313 near the second support base 314. A connecting groove 22 is provided in the groove wall of the recess 21, extending through the placement platform 2 along the width direction of the mounting plate 11 and connecting to the outside. The side of the connecting groove 22 away from the mounting plate 11 extends through the placement platform 2, and the side wall of the connecting groove 22 near the mounting plate 11 is flush with the bottom of the recess 21. The axis of the connecting groove 22 is coplanar with the axis of the placement platform 2. There are two connecting grooves 22, symmetrically distributed along the width direction of the mounting plate 11. The micrometer screw 32 and the anvil 33 pass through two connecting grooves 22 and extend into the recess 21 to detect the outer diameter of the gear to be measured. The first support 313 is provided with a first mounting hole 3132, the axis of which coincides with the axis of the connecting groove. One end of the anvil 33 passes through the first mounting hole 3132 and the connecting groove 22 in sequence and extends into the recess 21. The second support 314 is provided with a second mounting hole 3142, the axis of which coincides with the axis of the first mounting hole 3132. One end of the micrometer screw 32 passes through the second mounting hole 3142 and the connecting groove 22 in sequence and extends into the recess 21. The micrometer screw 32 and the anvil 33 are used to detect the outer diameter of the gear to be measured.

[0042] Reference Figure 1 and Figure 3A gear measurement and calibration auxiliary fixture also includes a limiting mechanism 4. A limiting groove 24 is provided at one end of the placement platform 2 near the mounting plate 11. The limiting groove 24 extends through the placement platform 2 along its axis. Two limiting grooves 24 are provided, symmetrically distributed along the length of the mounting plate 11. The limiting mechanism 4 includes a slider 41. The side of the limiting groove 24 closest to the other limiting groove 24 extends through the placement platform 2. The limiting groove 24 is connected to the insert groove 21 and the connecting hole 26. The limiting mechanism 4 includes sliders 41, the number of which is the same as the number of limiting grooves 24 and corresponds one-to-one. The sliders 41 slide and are embedded in the limiting grooves 24. The sliding direction of the sliders 41 is parallel to the length direction of the mounting plate 11. The two sidewalls of the sliders 41 perpendicular to the sliding direction of the sliders 41 are in contact with the groove walls of the limiting grooves 24. A V-groove 411 is provided on the surface of the slider 41 closest to the other slider 41. The groove wall of the V-groove 411 is used to abut against the outer wall of the gear to be measured.

[0043] Reference Figure 3 The limiting mechanism 4 also includes a transmission gear 42 and a transmission rack 43. A receiving groove 112 is provided on the surface of the mounting plate 11 away from the placement platform 2. The transmission gear 42 is rotatably embedded in the receiving groove 112, and the rotation axis of the transmission gear 42 coincides with the axis of the placement platform 2. The number of transmission racks 43 is the same as the number of sliders 41 and corresponds one-to-one. The transmission racks 43 are slidably embedded in the receiving groove 112, and the sliding direction of the transmission racks 43 is parallel to the sliding direction of the sliders 41. The transmission racks 43 mesh with the transmission gear 42. A connecting block 46 is fixedly connected to the end of the transmission rack 43 away from the transmission gear 42. A guide groove 113 is provided at the bottom of the receiving groove 112, and the number of guide grooves 113 is the same as the number of sliders 41 and corresponds one-to-one. The other end of the connecting block 46 passes through the guide groove 113 and is fixedly connected to the end of the slider 41 near the mounting plate 11. The two sidewalls of the connecting block 46 perpendicular to the sliding direction of the transmission rack 43 are in contact with the walls of the guide groove 113.

[0044] Reference Figure 3 and Figure 4The limiting mechanism 4 also includes a lead screw 44 and a handwheel 45. A second connecting hole 114 is provided on the side of the guide groove 113 away from the connecting seat 311 along the sliding direction of the slider 41. The second connecting hole 114 penetrates the mounting plate 11 along the sliding direction of the slider 41. One end of the lead screw 44 is rotatably connected to the surface of the connecting block 46 away from the other slider 41. The rotation axis of the lead screw 44 is parallel to the sliding direction of the slider 41. The other end of the lead screw 44 extends out of the mounting plate 11 after passing through the second connecting hole 114. The handwheel 45 is coaxially fixedly connected to the end of the lead screw 44 away from the connecting hole. The base 1 also includes a fixed seat 12, a rotating seat 13, and a first reset member 14. The fixed seat 12 is fixedly connected to the end of the mounting plate 11 near the handwheel 45. The fixed seat 12 is located on the side of the lead screw 44 away from the placement platform 2. A rotating groove 121 is provided on the side of the fixed seat 12 near the lead screw 44, for the lead screw 44 to pass through. One end of the rotating seat 13 is rotatably connected to one end of the fixed seat 12. The rotation axis of the rotating seat 13 is parallel to the rotation axis of the lead screw 44. The rotating seat 13 has a concave arc groove 131 for threaded connection of the lead screw 44 on the side near the lead screw 44. The fixed seat 12 has a groove 123 on the side near the rotation axis of the rotating seat 13. A protrusion 133 is fixedly connected to the side of the rotating seat 13 near the groove 123. The protrusion 133 is rotatably embedded in the groove 123. A first reset member 14 is connected between the protrusion 133 and the fixed seat 12. The first reset member 14 makes the rotating seat 13 tend to abut against the outer wall of the lead screw 44. In this embodiment, the first reset member 14 is a torsion spring. One end of the first reset member 14 is connected to the surface of the protrusion 133 away from the mounting plate 11, and the other end of the first reset member 14 is connected to the groove wall of the groove 123 away from the mounting plate 11. There are two first reset members 14, which are symmetrically distributed along the rotation axis of the rotating seat 13.

[0045] Reference Figure 4 and Figure 5 The base 1 also includes a locking block 15. The fixed seat 12 has a first locking groove 122 at its end away from the groove 123, and the rotating seat 13 has a second locking groove 132 at its end away from the protrusion 133. The locking block 15 includes a connecting section 151 and an inserting section 152. One side surface of the connecting section 151 abuts against the end of the fixed seat 12 near the first locking groove 122 and the side of the rotating seat 13 near the second locking groove 132. Two inserting sections 152 are provided, located at both ends of the connecting section 151 along its length, with the length direction of the inserting sections 152 perpendicular to the length direction of the connecting section 151. The two inserting sections 152 are located on the side of the connecting section 151 near the lead screw 44. When both inserting sections 152 are simultaneously inserted into the first locking groove 122 and the second locking groove 132, the concave groove 131 is threadedly connected to the lead screw 44.

[0046] The implementation principle of the gear measurement and calibration auxiliary fixture in this application embodiment is as follows: During assembly, the placement platform 2 is brought close to the mounting plate 11, so that the slider 41 is embedded in the limiting groove 24, and the side wall of the slider 41 is in contact with the groove wall of the limiting groove 24. The locking block 15 is removed, and the rotating seat 13 is pushed to rotate against the elastic force of the first reset member 14. The handwheel 45 is pulled, which drives the lead screw 44 to slide, and drives the slider 41 to slide, so that the slider 41 abuts against the side wall of the limiting groove 24 away from the other limiting groove 24, thereby achieving the initial fixation of the placement platform 2 and the mounting plate 11. The rotating seat 13 is released, and the two embedding sections 152 are respectively embedded into the first locking groove 122 and the second locking groove 132, thereby achieving the limiting of the rotating seat 13 and the fixed seat 12. After the bolt passes through the first connecting hole 111, it is threadedly connected to the first fixing hole 23, thereby achieving the fixed connection of the placement platform 2 and the mounting plate 11.

[0047] In use, the gear to be tested is placed in the groove 21, and the first support 313 and the second support 314 are slid close to the placement platform 2. The first support 313 abuts against the contact surface 25. The micrometer screw 32 and the anvil 33 pass through the two connecting grooves 22 and then extend into the groove 21. The bolt passes through the adjustment groove 3112 and is threadedly connected to the second fixing hole 3131 or the third fixing hole 3141 to achieve relative fixation of the first support 313 and the second support 314. The gear to be tested is rotated to test the outer wall of each part of the gear to be tested.

[0048] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gear measuring and calibration auxiliary fixture, characterized in that: Includes a base (1), a placement platform (2), and a micrometer (3); the placement platform (2) is connected to the upper end of the base (1); the upper end of the placement platform (2) is provided with a groove (21); the groove (21) is used for placing the gear to be measured; the groove wall of the groove (21) is provided with a connecting groove (22); the connecting groove (22) connects the groove (21) and the outside; the axis of the connecting groove (22) is coplanar with the axis of the groove (21); the connecting groove (22) is provided with two The two connecting slots (22) are symmetrically distributed along the axis of the connecting slots (22); the micrometer (3) includes a mounting bracket (31), a micrometer screw (32) and a measuring anvil (33); the mounting bracket (31) is connected to the base (1); the micrometer screw (32) and the measuring anvil (33) are connected to the mounting bracket (31); the micrometer screw (32) and the measuring anvil (33) pass through the two connecting slots (22) and then extend into the groove (21) to detect the outer diameter of the gear to be measured.

2. The gear measurement and calibration auxiliary fixture according to claim 1, characterized in that: The placement platform (2) has a plurality of first fixing holes (23) at one end near the base (1); the plurality of first fixing holes (23) are circumferentially distributed around the axis of the placement platform (2); the base (1) has a first connecting hole (111); the first connecting hole (111) is used for bolts to pass through and be threadedly connected to the first fixing hole (23).

3. The gear measurement and calibration auxiliary fixture according to claim 2, characterized in that: It also includes a slider (41); the slider (41) is slidably connected to the base (1); the sliding direction of the slider (41) is perpendicular to the axis of the connecting groove (22); there are two sliders (41); the two sliders (41) are symmetrically distributed along the sliding direction of the slider (41); the lower end of the placement platform (2) is provided with a limiting groove (24); the number of limiting grooves (24) is the same as the number of sliders (41) and they correspond one to one; the limiting grooves (24) are used for the sliders (41) to be embedded; the groove wall of the limiting groove (24) is in contact with the side wall of the slider (41).

4. The gear measurement and calibration auxiliary fixture according to claim 3, characterized in that: The groove (21) is connected to the limiting groove (24); the slider (41) is provided with a V-groove (411) on the side near the axis of the placement platform (2); the wall of the V-groove (411) is used to abut against the outer wall of the gear to be tested.

5. The gear measurement and calibration auxiliary fixture according to claim 4, characterized in that: It also includes a transmission gear (42) and a transmission rack (43); the number of transmission racks (43) is the same as the number of sliders (41) and they correspond one-to-one; one end of the transmission rack (43) is connected to the slider (41); the transmission gear (42) is rotatably connected to the base (1); the rotation axis of the transmission gear (42) is parallel to the axis of the placement platform (2); the transmission gear (42) meshes with the transmission rack (43).

6. The gear measurement and calibration auxiliary fixture according to claim 5, characterized in that: It also includes a lead screw (44) and a handwheel (45); one end of the lead screw (44) is rotatably connected to any slider (41); the rotation axis of the lead screw (44) is parallel to the sliding direction of the slider (41); the lead screw (44) is threadedly connected to the base (1); the handwheel (45) is connected to the other end of the lead screw (44).

7. The gear measurement and calibration auxiliary fixture according to claim 6, characterized in that: The base (1) further includes a fixed seat (12), a rotating seat (13), and a first reset member (14); the fixed seat (12) is connected to the base (1); the fixed seat (12) has a rotating groove (121) on the side near the lead screw (44); the rotating groove (121) is used for the lead screw (44) to pass through; the rotating seat (13) is rotatably connected to the base (1); the rotation axis of the rotating seat (13) is parallel to the rotation axis of the lead screw (44); the rotating seat (13) has a concave arc groove (131) on the side near the lead screw (44) for threaded connection of the lead screw (44); the first reset member (14) is connected between the rotating seat (13) and the base (1); the first reset member (14) makes the rotating seat (13) tend to abut against the outer wall of the lead screw (44).

8. The gear measurement and calibration auxiliary fixture according to claim 7, characterized in that: The base (1) also includes a locking block (15); the fixed seat (12) is provided with a first locking groove (122); the rotating seat (13) is provided with a second locking groove (132); the locking block (15) is used to simultaneously embed into the first locking groove (122) and the second locking groove (132); when the locking block (15) is simultaneously embedded into the first locking groove (122) and the second locking groove (132); the rotating seat (13) is threadedly connected to the lead screw (44).

9. The gear measurement and calibration auxiliary fixture according to claim 1, characterized in that: The outer wall of the placement platform (2) is provided with an abutment surface (25); the abutment surface (25) is perpendicular to the axis of the connecting groove (22); the abutment surface (25) is used to abut against the mounting bracket (31).

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