Tooth feeding tool for double-meshing simulation and double-meshing instrument

By designing a double-mesh simulation upper tooth tooling, using adjustable mounting components and detection components, rapid fixation and high-precision measurement of gears of different inner diameters are achieved, solving the problems of installation accuracy and scope of application in the prior art, and improving economic benefits.

CN223295404UActive Publication Date: 2025-09-02CHONGQING ZHONGMENG TECH CO LTD
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Patent Information

Application Number
CN202421777774.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-25
Publication Date
2025-09-02
Estimated Expiration
2034-07-25

AI Technical Summary

Technical Problem

It is difficult for the prior art to achieve rapid installation of gears with different inner diameters and improve the accuracy of the gears to be tested to dock with the instrument.

Method used

A double-mesh simulation upper tooth tooling is designed, which includes an adjustable mounting assembly and a detection assembly. Through the combination of an adjustable mounting column and a rotating ring, the fixation of gears of different inner diameters is achieved, and the meshing of the test gears through an electric push rod and a motor drive is simulated to simulate the gear operation, detect errors and display the results.

Benefits of technology

The application scope of the device has been expanded, the assembly accuracy and economic benefits have been improved, the accurate positioning and high-precision measurement of gears of different inner diameters have been ensured, and the cost of the instrument is saved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model, which belongs to the technical field of the double-engaging instrument, discloses a double-engaging simulated tooth mounting tool comprising a frame, an adjustable mounting assembly installed on the frame, the adjustable mounting assembly comprising a test cabinet, a coaxial mounting assembly, a gear to be tested and an adjustable mounting column, the top of the frame being fixedly connected with the test cabinet, the coaxial mounting assembly being fixedly connected with the coaxial mounting assembly, and the adjustable mounting column being fixedly connected with the coaxial mounting assembly. One side of the top of the test cabinet is connected with a coaxial mounting assembly, the coaxial mounting assembly is connected with an adjustable mounting column, and the outer side of the adjustable mounting column is clamped with a gear to be tested; the coaxial installation assembly comprises an installation plate, an installation ring, a clamping groove and a clamping block. The to-be-measured gear sleeves the outer side of the adjustable mounting column, and the adjustable mounting column is adjusted according to the inner diameter of the to-be-measured gear, so that the to-be-measured gears with different inner diameters are fixed; and then the clamping block at the bottom of the adjustable mounting column is embedded into the clamping groove, so that the adjustable mounting column and the mounting ring are accurately fixed, the coaxiality of the adjustable mounting column and the mounting ring is ensured, and the assembly precision is improved.
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Description

Technical Field

[0001] The utility model relates to the technical field of double-meshing instruments, in particular to a double-meshing simulation upper tooth tooling and a double-meshing instrument. Background Art

[0002] The double meshing instrument is used to perform comprehensive measurement of double-sided meshing of gears and check the radial error of gear tooth surface to ensure the quality of gears. The simulation system based on the double meshing instrument simulates the actual assembly process to help people better understand and master the double meshing instrument.

[0003] For example, Chinese patent CN219005785U proposes a centering tool for a disc-tooth double-meshing instrument, including a core shaft, the core shaft sleeve is provided with a dense bead sleeve, and the outer walls of the core shaft on both sides of the dense bead sleeve are provided with a limiting structure; the dense bead sleeve is provided with a gap between the end close to the feeding side and the limiting structure, and the end away from the feeding side is elastically connected to the limiting structure; the structure of this application is simple, and the workpiece is guided by the dense bead sleeve to realize automatic centering and clamping of the workpiece by its own weight, thereby reducing the measurement error caused by the gap between the inner hole of the workpiece and the tooling.

[0004] However, the above patent cannot realize the rapid installation of gears with different inner diameters, and the accuracy of the connection between the gear to be measured and the instrument needs to be further improved.

[0005] Based on this, the utility model designs a double-meshing simulation upper gear tooling and a double-meshing instrument to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a double-meshing simulation upper gear tool and a double-meshing instrument.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A double-meshing simulated upper gear tooling includes a frame;

[0009] An adjustable mounting assembly is installed on the rack;

[0010] The adjustable mounting assembly includes a test cabinet, a coaxial mounting assembly, a gear to be tested, and an adjustable mounting column. The top of the frame is fixedly connected to the test cabinet, the top side of the test cabinet is connected to the coaxial mounting assembly, the coaxial mounting assembly is connected to the adjustable mounting column, and the outer side of the adjustable mounting column is clamped with the gear to be tested;

[0011] The coaxial mounting assembly includes a mounting plate, a mounting ring, a slot and a block. The mounting plate is fixedly connected to one side of the top of the test cabinet, the mounting ring is rotatably connected to the top of the mounting plate, a slot is provided on the inner side of the mounting ring, and the bottom outer wall of the adjustable mounting column is connected to a block that fits into the slot.

[0012] Furthermore, the adjustable mounting column includes a rotating ring, an adjusting column, a first mounting column, an arc groove, a slider and a spring. The outer side of the bottom of the first mounting column is fixedly connected with a clamping block, and the bottom of the first mounting column can be clamped with the inner side of the mounting ring. The outer side of the bottom of the first mounting column and above the clamping block is rotatably connected with a rotating ring. A cavity is opened inside the rotating ring, and a plurality of arc grooves are opened at equal intervals on the top surface of the rotating ring. The plurality of arc grooves are connected with the cavity. The bottoms of the plurality of adjusting columns are respectively inserted into the corresponding arc grooves for limited sliding connection. The bottoms of the plurality of adjusting columns are inserted into the cavity and are fixedly connected with sliders. The plurality of sliders are limited and slidably connected to the bottom wall of the cavity. A spring is fixedly installed between each slider and the inside of the cavity, and the spring is always in a compressed state.

[0013] Furthermore, the outer wall of the adjusting column is in contact with the inner wall of the gear to be measured.

[0014] Furthermore, the top surface of the rotating ring is in contact with the bottom surface of the gear to be tested.

[0015] A double-meshing instrument comprising the upper gear tooling of the double-meshing simulation, wherein a test cabinet in the upper gear tooling is provided with a detection component;

[0016] The frame is provided with a fixing assembly for locking the top of the gear to be tested and a display screen for displaying test data;

[0017] A displacement sensor is provided on the fixing component, and the displacement sensor is electrically connected to the display screen.

[0018] Furthermore, the detection component includes a slide plate, a second mounting column, a test gear, an electric push rod and a second motor. The front and rear ends of the bottom surface of the slide plate are respectively connected to the front and rear end limit sliding connections of the top of the test cabinet. The bottom of the slide plate is fixedly connected to the second motor. The top of the slide plate is rotatably connected to the second mounting column. The test gear is clamped on the outside of the second mounting column. The bottom of the second mounting column rotates through the slide plate and is fixedly connected to the output end of the second motor. The electric push rod is fixedly connected to the right side of the inner wall of the test cabinet, and the right side of the bottom of the slide plate is fixedly connected to the output end of the electric push rod.

[0019] Furthermore, the fixing assembly includes a limit slot, a connecting block and a locking block. A limit slot is provided on the frame. One end of the connecting block is embedded in the limit slot for limited sliding connection. The bottom of the other end of the connecting block is rotatably connected to the locking block. The bottom of the locking block is in contact and connected with the top of the gear to be tested.

[0020] Furthermore, the locking block can be engaged with the first mounting post.

[0021] The utility model has the following technical effects:

[0022] 1. In the present invention, when it is necessary to inspect the gear to be tested, the adjustable mounting post is pulled upward from the mounting ring until the block is out of the slot, and then the gear to be tested is sleeved on the outside of the adjustable mounting post. The adjustable mounting post is adjusted according to the inner diameter of the gear to be tested, so that gears to be tested with different inner diameters can be fixed, thereby expanding the scope of application of the device, increasing the application scenarios, saving instrument costs, and improving economic benefits; then the block on the bottom of the adjustable mounting post is embedded in the slot, so that the adjustable mounting post and the mounting ring are accurately fixed, ensuring the coaxiality of the adjustable mounting post and the mounting ring, and improving the assembly accuracy.

[0023] 2. In the present invention, the rotating ring is rotated to move the multiple adjustment columns toward each other, and then the gear to be measured is sleeved on the outside of the first mounting column and moved downward until the measuring gear contacts the top surface of the rotating ring. The rotating ring is released, and the elastic restoring force of the spring is used to drive the multiple sliders toward each other, so that the outer wall of the adjustment column and the inner wall of the gear to be measured come into contact and stop moving, thereby achieving the fixation of gears to be measured with different inner diameters.

[0024] 3. In the present invention, when the gear to be tested is fixed on the top of the rotating ring and located outside the adjusting column, the electric push rod drives the test gear to move toward the gear to be tested until the test gear engages with the gear to be tested, and the electric push rod stops running; by starting the second motor to drive the test gear to rotate, the test gear engages and drives the gear to be tested to rotate, thereby simulating the scene when the gear to be tested is running, and the displacement sensor detects the radial comprehensive error of one circle and the radial comprehensive error of one tooth when the test gear and the gear to be tested rotate, and displays the results on the display screen.

[0025] 4. In the present invention, when the gear to be tested is fixed on the top of the rotating ring and located outside the adjusting column, the external cylinder drives the connecting block and the locking block to move downward, so that the bottom of the locking block is engaged with the first mounting column and contacts the top of the gear to be tested. The test gear is engaged to drive the gear to be tested to rotate, and the locking block drives the first mounting column to rotate. The first mounting column drives the mounting ring to rotate through the clamping block and the clamping groove; after the measurement is completed, the external cylinder drives the connecting block and the locking block to move upward to facilitate the removal of the gear to be tested for the next set of tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0027] Figure 1This is a three-dimensional diagram of a double-meshing simulation upper gear tooling and a double-meshing instrument of the present invention;

[0028] Figure 2 This is a front view of a double-meshing simulation upper gear tool and a double-meshing instrument of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the adjustable installation component and the detection component of the utility model Figure 1 ;

[0030] Figure 4 This is a schematic diagram of the structure of the adjustable installation component and the detection component of the utility model Figure 2 ;

[0031] Figure 5 This is a schematic diagram of the structure of the adjustable installation component and the detection component of the utility model Figure 3 ;

[0032] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0033] Figure 7 This is a schematic diagram of the structure of the adjustable mounting column of the utility model Figure 1 ;

[0034] Figure 8 This is a schematic diagram of the structure of the adjustable mounting column of the utility model Figure 2 ;

[0035] Figure 9 It is a half-section view of the adjustable mounting column of the present invention.

[0036] The numbers in the figure represent:

[0037] 1. Rack; 2. Adjustable mounting assembly; 21. Test cabinet; 22. Coaxial mounting assembly; 221. Mounting plate; 222. Mounting ring; 223. Slot; 224. Block; 24. Gear to be tested; 25. Adjustable mounting post; 251. Rotating ring; 252. Adjusting post; 253. First mounting post; 254. Arc groove; 255. Slider; 256. Spring; 3. Detection assembly; 31. Slide plate; 32. Second mounting post; 33. Test gear; 34. Electric push rod; 35. Second motor; 4. Fixing assembly; 41. Limiting slot; 42. Connecting block; 43. Locking block; 5. Display screen. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0039] The present invention will be further described below with reference to the embodiments.

[0040] The terms “left,” “right,” “front,” “back,” “up,” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0041] Example 1

[0042] Please refer to the instruction manual Figure 1-9 A double-meshing simulated upper gear tooling includes a frame 1, an adjustable mounting assembly 2 is installed on the frame 1, the adjustable mounting assembly 2 includes a test cabinet 21, a coaxial mounting assembly 22, a gear to be tested 24 and an adjustable mounting column 25, the top of the frame 1 is fixedly connected to the test cabinet 21, the top side of the test cabinet 21 is connected to the coaxial mounting assembly 22, the coaxial mounting assembly 22 is connected to the adjustable mounting column 25, and the outer side of the adjustable mounting column 25 is clamped with the gear to be tested 24.

[0043] The coaxial mounting assembly 22 includes a mounting plate 221, a mounting ring 222, a slot 223 and a block 224. The mounting plate 221 is fixedly connected to one side of the top of the test cabinet 21, and the mounting ring 222 is rotatably connected to the top of the mounting plate 221. A slot 223 is provided on the inner side of the mounting ring 222, and a block 224 that fits into the slot 223 is connected to the bottom outer wall of the adjustable mounting column 25.

[0044] When it is necessary to inspect the gear 24 to be tested, the adjustable mounting post 25 is pulled upward from the mounting ring 222 until the block 224 is out of the slot 223; then the gear 24 to be tested is sleeved on the outside of the adjustable mounting post 25, and the adjustable mounting post 25 is adjusted according to the inner diameter of the gear 24 to be tested, so that gears 24 to be tested with different inner diameters can be fixed, thereby expanding the scope of application of the device, increasing the application scenarios, saving instrument costs, and improving economic benefits; then the block 224 on the bottom of the adjustable mounting post 25 is embedded in the slot 223, so that the adjustable mounting post 25 and the mounting ring 222 are accurately fixed, ensuring the coaxiality of the adjustable mounting post 25 and the mounting ring 222, and improving the assembly accuracy.

[0045] In this embodiment, the adjustable mounting column 25 includes a rotating ring 251, an adjusting column 252, a first mounting column 253, an arcuate groove 254, a slider 255 and a spring 256. The outer side of the bottom of the first mounting column 253 is fixedly connected to the clamping block 224, and the bottom of the first mounting column 253 can be clamped with the inner side of the mounting ring 222. The outer side of the bottom of the first mounting column 253 and above the clamping block 224 are rotatably connected to the rotating ring 251. A cavity is defined inside the rotating ring 251. A plurality of arcuate grooves 254 are defined at equal intervals on the top of the rotating ring 251. The plurality of arcuate grooves 254 are all connected to the cavity. The bottoms of the plurality of adjusting columns 252 are respectively inserted into the corresponding arcuate grooves 254 for limited sliding connection. The bottoms of the plurality of adjusting columns 252 are inserted into the cavity and are fixedly connected to the slider 255. The plurality of sliders 255 are limited sliding connection with the bottom wall of the cavity. A spring 256 is fixedly installed between each slider 255 and the inside of the cavity, and the spring 256 is always in a compressed state.

[0046] Preferably, the outer wall of the adjustment column 252 is in contact with the inner wall of the gear to be measured 24 ; and the top surface of the rotating ring 251 is in contact with the bottom surface of the gear to be measured 24 .

[0047] When the gear 24 to be measured is mounted on the adjustable mounting post 25, the rotating ring 251 is rotated, and the rotating ring 251 drives the arc groove 254 to rotate, so that the multiple adjusting posts 252 move toward each other under the limiting guide action of the arc groove 254, and the adjusting posts 252 drive the slider 255 to move toward each other under the limiting guide action inside the cavity, and the slider 255 further squeezes the spring 256. At this time, the first mounting post 253 passes through the gear 24 to be measured, and the gear 24 to be measured is moved from the first mounting post 253 to the second mounting post 253. The top of a mounting column 253 moves downward; when the bottom surface of the gear 24 to be measured contacts the top surface of the rotating ring 251, the rotating ring 251 is no longer rotated. At this time, the elastic restoring force of the spring 256 drives the multiple sliders 255 to push away from each other. The sliders 255 drive the adjusting columns 252 to move away from each other under the limiting and guiding action of the arc groove 254. When the outer wall of the adjusting column 252 contacts the inner wall of the gear 24 to be measured, it stops moving, thereby achieving the fixation of the gears 24 to be measured with different inner diameters.

[0048] In a double-meshing instrument including the above-mentioned double-meshing simulation upper gear tooling, a detection component 3 is provided on the test cabinet 21 in the upper gear tooling, and a frame 1 is provided with a fixing component 4 for locking the top of the gear to be tested 24 and a display screen 5 for displaying test data. A displacement sensor is provided on the fixing component 4, and the displacement sensor and the display screen 5 are electrically connected.

[0049] The detection component 3 includes a slide plate 31, a second mounting column 32, a test gear 33, an electric push rod 34 and a second motor 35. The front and rear ends of the bottom surface of the slide plate 31 are respectively connected to the front and rear end limit sliding connection of the top of the test cabinet 21. The bottom of the slide plate 31 is fixedly connected to the second motor 35, and the top of the slide plate 31 is rotatably connected to the second mounting column 32. The test gear 33 is clamped on the outer side of the second mounting column 32. The bottom of the second mounting column 32 rotates through the slide plate 31 and is fixedly connected to the output end of the second motor 35. The electric push rod 34 is fixedly connected to the right side of the inner wall of the test cabinet 21, and the right side of the bottom of the slide plate 31 is fixedly connected to the output end of the electric push rod 34.

[0050] When the gear 24 to be tested is fixed on the rotating ring 251 and is located outside the adjusting column 252, the fixing component 4 fixes the top of the gear 24 to be tested, and then the electric push rod 34 is started. The output end of the electric push rod 34 drives the slide plate 31 to move toward the mounting plate 221 under the limiting guide action of the top of the test cabinet 21. When the test gear 33 is engaged with the gear 24 to be tested, the electric push rod 34 stops running; then the second motor 35 is started, and the output end of the second motor 35 drives the test gear 33 to rotate through the second mounting column 32. The test gear 33 engages and drives the gear 24 to be tested to rotate, thereby simulating the scene when the gear 24 to be tested is running. The displacement sensor detects the radial comprehensive error of one circle and the radial comprehensive error of one tooth when the test gear 33 and the gear 24 to be tested are rotated, and the results are displayed on the display screen 5.

[0051] The fixing component 4 includes a limit slot 41, a connecting block 42 and a top locking block 43. A limit slot 41 is provided on the frame 1. One end of the connecting block 42 is embedded in the limit slot 41 and is slidingly connected thereto. The bottom of the other end of the connecting block 42 is rotatably connected to the locking block 43. The bottom of the locking block 43 is in contact with the top of the gear 24 to be tested.

[0052] Preferably, the locking block 43 can be engaged with the first mounting column 253, and the connecting block 42 is fixedly connected to the output end of the external cylinder.

[0053] When the gear 24 to be tested is fixed on the rotating ring 251 and is located outside the adjusting column 252, the external cylinder drives the connecting block 42 and the end locking block 43 to move downward, and the bottom of the locking block 43 is engaged with the first mounting column 253 and contacts the top surface of the gear 24 to be tested; when the test gear 33 engages and drives the gear 24 to be tested to rotate, the gear 24 to be tested drives the locking block 43, the adjusting column 252, and the rotating ring 251 to rotate, and the locking block 43 drives the first mounting column 253 to rotate, and the first mounting column 253 drives the mounting ring 222 to rotate through the clamping block 224 and the clamping groove 223; when the measurement is completed, the external cylinder drives the connecting block 42 and the locking block 43 to move upward to facilitate the removal of the gear 24 to be tested for the next set of tests.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A double-meshing simulated upper gear tooling, comprising a frame (1), characterized in that: An adjustable mounting assembly (2) is mounted on the frame (1); The adjustable mounting assembly (2) comprises a test cabinet (21), a coaxial mounting assembly (22), a gear to be tested (24) and an adjustable mounting column (25); the top of the frame (1) is fixedly connected to the test cabinet (21); one side of the top of the test cabinet (21) is connected to the coaxial mounting assembly (22); the adjustable mounting column (25) is connected to the coaxial mounting assembly (22); and the gear to be tested (24) is clamped on the outer side of the adjustable mounting column (25); The coaxial mounting assembly (22) comprises a mounting plate (221), a mounting ring (222), a slot (223) and a clamping block (224); one side of the top of the test cabinet (21) is fixedly connected to the mounting plate (221); the top of the mounting plate (221) is rotatably connected to the mounting ring (222); the inner side of the mounting ring (222) is provided with a slot (223); and the bottom outer wall of the adjustable mounting column (25) is connected to a clamping block (224) that fits into the slot (223).

2. The double-meshing simulated upper gear fixture according to claim 1, characterized in that: The adjustable mounting column (25) comprises a rotating ring (251), an adjusting column (252), a first mounting column (253), an arc-shaped groove (254), a slider (255) and a spring (256); the outer side of the bottom of the first mounting column (253) is fixedly connected with a clamping block (224); the bottom of the first mounting column (253) can be clamped with the inner side of the mounting ring (222); the outer side of the bottom of the first mounting column (253) and located above the clamping block (224) is rotatably connected with a rotating ring (251); a cavity is provided inside the rotating ring (251) The top surface of the rotating ring (251) is provided with a plurality of arc grooves (254) at equal intervals, and the plurality of arc grooves (254) are all connected to the cavity. The bottoms of the plurality of adjusting columns (252) are respectively inserted into the corresponding arc grooves (254) for limited sliding connection. The bottoms of the plurality of adjusting columns (252) are inserted into the cavity and are fixedly connected with sliders (255). The plurality of sliders (255) are limited slidingly connected to the bottom wall of the cavity. A spring (256) is fixedly installed between each slider (255) and the inside of the cavity, and the spring (256) is always in a compressed state.

3. The double-meshing simulated upper gear tooling according to claim 2, characterized in that: The outer wall of the adjustment column (252) is in contact with the inner wall of the gear to be measured (24).

4. The double-meshing simulated upper gear fixture according to claim 3, characterized in that: The top surface of the rotating ring (251) is in contact with the bottom surface of the gear to be measured (24).

5. A double-meshing instrument comprising the double-meshing simulation upper tooth tooling according to any one of claims 1 to 4, characterized in that: A testing cabinet (21) in the upper gear tooling is provided with a detection component (3); The frame (1) is provided with a fixing assembly (4) for locking the top of the gear (24) to be tested and a display screen (5) for displaying test data; A displacement sensor is provided on the fixing component (4), and the displacement sensor is electrically connected to the display screen (5).

6. The double-biting instrument according to claim 5, characterized in that: The detection assembly (3) comprises a slide plate (31), a second mounting post (32), a test gear (33), an electric push rod (34) and a second motor (35). The front and rear ends of the bottom surface of the slide plate (31) are respectively connected to the front and rear ends of the top of the test cabinet (21) in a limited sliding manner. The bottom of the slide plate (31) is fixedly connected to the second motor (35). The top of the slide plate (31) is rotatably connected to the second mounting post (32). The outer side of the second mounting post (32) is clamped with the test gear (33). The bottom of the second mounting post (32) rotates through the slide plate (31) and is fixedly connected to the output end of the second motor (35). The electric push rod (34) is fixedly connected to the right side of the inner wall of the test cabinet (21). The right side of the bottom of the slide plate (31) is fixedly connected to the output end of the electric push rod (34).

7. The double-biting instrument according to claim 6, characterized in that: The fixing assembly (4) comprises a limiting groove (41), a connecting block (42) and a locking block (43); the limiting groove (41) is provided on the frame (1); one end of the connecting block (42) is embedded in the limiting groove (41) for limiting sliding connection; the bottom of the other end of the connecting block (42) is rotatably connected to the locking block (43); the bottom of the locking block (43) is in contact with the top of the gear to be measured (24).

8. The double-biting instrument according to claim 7, characterized in that: The locking block (43) can be engaged with the first mounting column (253).

Citation Information

Patent Citations

  • Centering tool for disc tooth double-meshing instrument

    CN219005785U