Device for detecting tooth depth of gear

Abstract

The utility model relates to a device for detecting the tooth depth of a gear. The device comprises a workbench, a connecting column arranged on the workbench, the gear arranged on the connecting column, a positioning device for positioning a tooth groove in the gear, a moving piece for moving the positioning device, and a measuring device for measuring the depth of the tooth groove of the gear. A hole groove corresponding to the connecting column is formed in the gear; when the connecting column penetrates through the hole groove, the gear is arranged on the connecting column; the moving part is arranged on the workbench, and the acting end of the moving part faces the connecting column. The acting end of the moving part is connected with the positioning device; and the measuring device is arranged on the positioning device and is positioned in the middle of the positioning device. The problem of how to completely align the middle part of the tooth groove with the measuring end, so that the deviation during measurement needs to be observed by human eyes is solved.

Description

Technical Field

[0001] This utility model relates to the field of gears, and in particular to a device for detecting gear tooth depth. Background Technology

[0002] In the prior art, a gear is a mechanical part with multiple teeth, often used to transmit rotary motion to other rotary mechanisms or to convert linear motion into rotary motion. The tooth depth of a gear refers to the distance from the tooth tip to the tooth root, which is one of the important parameters of a gear. To ensure the performance of a gear, the tooth depth of the gear needs to be tested using a specialized testing device.

[0003] In existing gear tooth depth testing, operators first measure the addendum circle radius of the gear using calipers, then measure the root circle radius. The difference between the addendum and root circles is the gear tooth depth, used to determine its compliance. However, current technology relies on manual calculation of tooth depth values. This manual calculation can lead to errors or omissions, resulting in numerical deviations and is time-consuming. Therefore, a new device for detecting gear tooth depth is proposed.

[0004] Utility model CN221147467U discloses a device for detecting gear tooth depth, including a measuring platform and a limiting rod. A measuring mechanism is provided on the upper surface of the measuring platform. The spring force drives a moving plate, causing the measuring rod to move inward and abut against the root of the gear tooth. The gear tooth tip pushes the arc-shaped measuring rod outward, and a U-shaped moving block presses against the connecting spring. At this point, the outward movement distance of the arc-shaped measuring rod is equal to the distance between the gear tooth tip and root. The outward movement dimension of the arc-shaped measuring rod can be directly obtained using a micrometer, thus determining the gear tooth depth without manual calculation, avoiding errors or omissions that could lead to numerical deviations. Operators can judge whether the gear is qualified based on the measured data. However, it does not solve the problem of how to perfectly align the middle of the tooth groove with the measuring end, requiring visual observation to determine measurement deviations. Utility Model Content

[0005] This application provides a device for detecting gear tooth depth, which solves the problem of an existing device for detecting gear tooth depth, including a measuring platform and a limiting rod. The measuring platform has a measuring mechanism on its upper surface. The spring force drives a moving plate to move the measuring rod inward to abut against the root of the gear tooth. The tip of the gear tooth pushes the arc-shaped measuring rod outward and is compressed by a U-shaped moving block. At this time, the distance the arc-shaped measuring rod moves outward is equal to the distance between the tip and root of the gear tooth. The tooth depth of the gear can be directly obtained by measuring the outward movement of the arc-shaped measuring rod with a micrometer, without the need for manual calculation, avoiding errors or omissions in manual calculation that could lead to numerical deviations. The operator judges whether the gear is qualified based on the measured data. However, it does not solve how to perfectly align the middle of the tooth groove with the measuring end, so the deviation during measurement needs to be observed by the human eye.

[0006] The technical solutions adopted in the embodiments of this application are as follows.

[0007] A device for detecting gear tooth depth includes a worktable, a connecting column disposed on the worktable, a gear disposed on the connecting column, a positioning device for positioning the tooth grooves on the gear, a moving component for moving the positioning device, and a measuring device for measuring the tooth groove depth of the gear; the gear has a hole or slot corresponding to the connecting column; when the connecting column passes through the hole or slot, the gear is disposed on the connecting column; the moving component is disposed on the worktable with its working end facing the connecting column; the working end of the moving component is connected to the positioning device; the measuring device is disposed on the positioning device and is located at the middle of the positioning device.

[0008] As a further improvement to the above technical solution: the positioning device includes a positioning block, a movable rod rotating on the positioning block, and a limiting member restricting the position of the gear; a first groove is provided on the positioning block; the movable rod rotates in the first groove; two sets of limiting members are arranged opposite to each other; the movable rod is threaded through the two sets of limiting members; the limiting member corresponds to the tooth groove on the gear.

[0009] As a further improvement to the above technical solution: the positioning block has a first surface corresponding to the gear on its side wall facing the gear; the first surface fits against the side wall of the gear.

[0010] As a further improvement to the above technical solution: the limiting member has a second surface facing the gear tooth groove; the second surface corresponds to the side wall of the gear tooth groove.

[0011] As a further improvement to the above technical solution: the measuring device includes a pushing member and a measuring member abutting against the bottom of the gear tooth groove; the measuring member is provided with an oblique angle facing the gear tooth groove; the oblique angle contacts the gear tooth groove line; a second groove is opened on the first groove; the measuring member slides in the second groove.

[0012] As a further improvement to the above technical solution: a driving component is provided on the positioning block; the driving component drives the moving rod to rotate; the moving rod is a bidirectional screw; the moving rod drives the limiting component so that the middle of the gear tooth groove corresponds to the measuring device.

[0013] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0014] 1. Employing a bidirectional screw-driven symmetrical limiting mechanism, the device automatically aligns with the gear tooth centerline, eliminating the deviation risks associated with traditional manual visual positioning. The measuring end features a dynamically adaptive contact structure, effectively reducing surface measurement errors through a line contact mode between the oblique angle and the tooth tooth. The device combines a three-dimensional positioning compensation mechanism, utilizing a reference surface conforming to the gear end face and a limiting constraint structure to automatically correct clamping eccentricity errors. The modular design supports quick replacement of measuring components to meet the testing needs of gears with different module sizes, while integrating a force feedback control system to prevent overload damage to the tooth surface. Furthermore, through material optimization and thermal stability design, measurement consistency is ensured under varying environmental temperature and humidity, making it suitable for batch testing of high-precision gears, significantly reducing manual operation complexity while improving testing reliability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the gear tooth depth detection device in this utility model.

[0016] Figure 2 This is a top view of the gear tooth depth detection device of this utility model.

[0017] Figure 3 This is a cross-sectional view of the gear tooth depth detection device of this utility model.

[0018] In the diagram: 1. Workbench; 2. Connecting column; 3. Gear; 31. Hole / slot; 4. Positioning device; 41. Positioning block; 411. First groove; 412. First surface; 413. Second groove; 42. Moving rod; 43. Limiting component; 431. Second surface; 44. Driving component; 5. Moving component; 6. Measuring device; 61. Pushing component; 62. Measuring component; 621. Angled angle. Detailed Implementation

[0019] This application provides a device for detecting gear tooth depth, which solves the problem of an existing device for detecting gear tooth depth, including a measuring platform and a limiting rod. The measuring platform has a measuring mechanism on its upper surface. The spring force drives a moving plate to move the measuring rod inward to abut against the root of the gear tooth. The tip of the gear tooth pushes the arc-shaped measuring rod outward and is compressed by a U-shaped moving block. At this time, the distance the arc-shaped measuring rod moves outward is equal to the distance between the tip and root of the gear tooth. The tooth depth of the gear can be directly obtained by measuring the outward movement of the arc-shaped measuring rod with a micrometer, without the need for manual calculation, avoiding errors or omissions in manual calculation that could lead to numerical deviations. The operator judges whether the gear is qualified based on the measured data. However, it does not solve how to perfectly align the middle of the tooth groove with the measuring end, so the deviation during measurement needs to be observed by the human eye.

[0020] The technical solution in this application embodiment is to solve the above problems, and the overall idea is as follows:

[0021] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0022] A device for detecting gear tooth depth includes a worktable 1, a connecting column 2 mounted on the worktable 1, a gear 3 mounted on the connecting column 2, a positioning device 4 for positioning the tooth grooves on the gear 3, a moving part 5 for moving the positioning device 4, and a measuring device 6 for measuring the tooth groove depth of the gear 3; the gear 3 has a hole 31 corresponding to the connecting column 2; when the connecting column 2 passes through the hole 31, the gear 3 is mounted on the connecting column 2; the moving part 5 is mounted on the worktable 1 with its working end facing the connecting column 2; the working end of the moving part 5 is connected to the positioning device 4; the measuring device 6 is mounted on the positioning device 4 and is located in the middle of the positioning device 4.

[0023] The positioning device 4 includes a positioning block 41, a moving rod 42 rotating on the positioning block 41, and a limiting member 43 restricting the position of the gear 3; the positioning block 41 has a first groove 411; the moving rod 42 rotates in the first groove 411; two sets of limiting members 43 are arranged opposite each other; the moving rod 42 is threaded through the two sets of limiting members 43; the limiting member 43 corresponds to the tooth groove on the gear 3.

[0024] The positioning block 41 has a first surface 412 on its side wall facing the gear 3, which corresponds to the gear 3; the first surface 412 fits against the side wall of the gear 3.

[0025] The limiting member 43 has a second surface 431 facing the tooth groove of the gear 3; the second surface 431 corresponds to the side wall of the tooth groove of the gear 3.

[0026] The measuring device 6 includes a pusher 61 and a measuring member 62 that abuts against the bottom of the tooth groove of the gear 3; the measuring member 62 is provided with an angle 621 facing the tooth groove of the gear 3; the angle 621 contacts the tooth groove line of the gear 3; a second groove 413 is provided on the first groove 411; the measuring member 62 slides in the second groove 413.

[0027] A driving component 44 is provided on the positioning block 41; the driving component 44 drives the moving rod 42 to rotate; the moving rod 42 is a bidirectional screw; the moving rod 42 drives the limiting component 43 so that the middle of the tooth groove of the gear 3 corresponds to the measuring device 6.

[0028] The bidirectional screw-driven symmetrical limiting mechanism automatically aligns with the tooth groove centerline, eliminating the deviation risks associated with traditional manual visual positioning. The measuring end features a dynamically adaptive contact structure, effectively reducing surface measurement errors through a 621° angled contact mode with the tooth groove. The device incorporates a three-dimensional positioning compensation mechanism, utilizing the reference surface conforming to the end face of gear 3 and the limiting constraint structure to automatically correct clamping eccentricity errors. The modular design supports quick replacement of measuring components to meet the testing needs of gears 3 with different module numbers, while integrating a force feedback control system to prevent overload damage to the tooth surface.

[0029] The device employs a bidirectional screw-driven symmetrical limiting mechanism, which automatically aligns with the center line of the gear tooth groove, eliminating the deviation risks associated with traditional manual visual positioning. The measuring end features a dynamically adaptive contact structure, effectively reducing surface measurement errors through a 621° angled contact mode with the tooth groove. The device incorporates a three-dimensional positioning compensation mechanism, utilizing the reference surface conforming to the end face of gear 3 and the limiting constraint structure to automatically correct clamping eccentricity errors. The modular design supports rapid replacement of measuring components to meet the testing requirements of gears 3 with different module numbers, while integrating a force feedback control system to prevent overload damage to the tooth surface.

[0030] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0031] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A gear tooth depth detection device characterized by, The utility model provides a gear tooth depth measuring device, including workbench (1), set up the connecting column (2) on the workbench (1), set up the gear (3) on the connecting column (2), the positioning device (4) of the gear (3) tooth slot position, the moving piece (5) of moving the positioning device (4), and the measuring device (6) of measuring the gear (3) tooth groove depth, the gear (3) is set up on the connecting column (2) when the connecting column (2) penetrates the hole groove (31), the moving piece (5) is set up on the workbench (1) and the moving piece (5) the acting end is towards the connecting column (2), the acting end of the moving piece (5) is connected the positioning device (4), the measuring device (6) is set up on the positioning device (4) and the measuring device (6) is located at the middle of the positioning device (4).

2. The gear tooth depth detection apparatus of claim 1, wherein The positioning device (4) includes positioning block (41), rotates the moving rod (42) on the positioning block (41), the limiting piece (43) of limiting the gear (3) position, the first slot (411) is set up on the positioning block (41), the moving rod (42) rotates in the first slot (411), the limiting piece (43) is oppositely provided with two groups, the moving rod (42) is screwed and is set in two groups the limiting piece (43), the limiting piece (43) corresponds with the gear (3) tooth groove.

3. The gear tooth depth detection apparatus of claim 2, wherein The first face (412) of the positioning block (41) is set up on the side wall towards the gear (3) corresponding with the gear (3), and the first face (412) is attached to the side wall of the gear (3).

4. The gear tooth depth detection apparatus of claim 2, wherein The second face (431) is set up on the limiting piece (43) towards the gear (3) tooth groove, and the second face (431) corresponds to the side wall of the gear (3) tooth groove.

5. The gear tooth depth detection apparatus of claim 2 wherein, The measuring device (6) includes a pushing member (61) and a measuring member (62) abutting against the bottom of the gear (3) tooth groove, the measuring member (62) is provided with an inclined angle (621) towards the gear (3) tooth groove, the inclined angle (621) is in line contact with the gear (3) tooth groove, a second slot (413) is formed in the first slot (411), and the measuring member (62) slides in the second slot (413).

6. The gear tooth depth checking device of claim 2, wherein, The positioning block (41) is provided with a driving member (44), the driving member (44) drives the moving rod (42) to rotate, the moving rod (42) is a bidirectional screw rod, and the moving rod (42) drives the limiting piece (43) to make the middle of the gear (3) tooth groove correspond to the measuring device (6).

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