A sprocket checking gauge

Abstract

The application discloses a chain wheel checking gauge and relates to the technical field of measurement. The chain wheel checking gauge is capable of making the detection end head run along the tooth edge of the chain wheel body through the cooperation of the detection rod and the detection end head and the running of the detection frame during the detection process. The detection of the tooth groove, the tooth edge and the tooth of the chain wheel body is realized by monitoring the feedback value of the feedback circuit, the detection operation of the size of the chain wheel body is realized, and compared with the traditional checking mode, the chain wheel checking gauge is more convenient, and the measurement efficiency and the measurement accuracy of the equipment are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of measurement technology, specifically to a sprocket inspection gauge. Background Technology

[0002] A sprocket is a wheel with interlocking chain teeth, used to mesh with precisely pitched blocks on link chains or cables. Sprockets are widely used in mechanical transmissions in industries such as chemical engineering, textile machinery, escalators, wood processing, automated parking garages, agricultural machinery, food processing, instrumentation, and petroleum. During sprocket production, the tooth grooves, tooth edges, and teeth need to be inspected to ensure production quality. Referring to Chinese patent publication number "CN205981011U" entitled "Sprocket Inspection Measuring Tool," this patent points out that the measurement method using a ruler is quite cumbersome and prone to loss due to the measuring column or ruler. However, the above-mentioned equipment still suffers from poor measurement results and low measurement efficiency. To address these issues, we propose a sprocket inspection measuring tool. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a sprocket inspection gauge, which solves the problems mentioned in the background section.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a sprocket inspection gauge, comprising a gauge body, a positioning frame installed inside the gauge body, a telescopic slide rod slidably installed inside the positioning frame, a detection frame rotatably sleeved on the outer side of the telescopic slide rod, and a detection rod rotatably connected to the end of the detection frame.

[0005] The end of the detection rod is fixed with a detection end. The detection end is used to contact the sprocket body as the detection frame and telescopic slide rod move down. When the detection end rotates with the detection frame, it can make the detection rod contact the tooth groove of the sprocket body and rotate under force.

[0006] The inside of the detection end is fixed with multiple mounting sleeves, and multiple inner slide rods are installed inside the mounting sleeves. The ends of the inner slide rods are rotatably connected to a ball for contact with the tooth grooves of the sprocket body.

[0007] The testing frame is equipped with a feedback module to monitor the rotation frequency and rotation angle of the testing rod. The feedback module includes a limit sleeve, with mounting brackets fixed on both sides of the limit sleeve. The mounting brackets are slidably installed inside the testing frame, and the ends of the mounting brackets are rotatably connected to the testing rod. The end of the testing rod is fixed with a transmission end, and the end of the transmission end is slidably connected inside the limit sleeve. An adjustment end is slidably assembled inside the limit sleeve, and a locking nut is provided on the outside of the limit sleeve to lock the position of the adjustment end.

[0008] A control panel is installed on the outside of the measuring instrument body. Feedback circuits are provided between multiple spherical bodies and the control panel. Feedback circuits are also provided between the transmission end and the adjustment end and the control panel.

[0009] Preferably, a drive motor is fixed to the outside of the telescopic slide rod to drive the detection frame to rotate outside the telescopic slide rod. A drive gear is fixedly sleeved at the output end of the drive motor. A transmission tooth groove is opened inside the detection frame, and the drive gear meshes with the transmission tooth groove.

[0010] Preferably, the top surface of the sleeve of the device is provided with a sliding groove, and a limit rod is fixedly installed at the end of the inner sliding rod. The limit rod is slidably installed inside the sliding groove, and a fixing nut for locking is sleeved at the end of the limit rod.

[0011] Preferably, a support spring is fixedly installed between the end of the inner slide rod away from the spherical body and the inside of the mounting sleeve.

[0012] Preferably, both ends of the detection rod are rotatably mounted with limit shafts, which are slidably connected to the detection frame. Each limit shaft is equipped with a spring to drive the detection rod to reset, and each end of the limit shaft is fitted with a positioning nut for locking.

[0013] Preferably, the measuring instrument body is provided with a locking component inside for positioning the placed sprocket body. The locking component includes a conical positioning frame, which is fixed inside the measuring instrument body and is used to fit the sprocket body onto the outside of the conical positioning frame. An anti-slip sleeve is fixedly installed on the outside of the conical positioning frame.

[0014] Preferably, the tapered positioning frame is connected to the measuring tool body by a thread, which is used to replace the tapered positioning frame according to the different sizes of the sprocket body.

[0015] Preferably, the locking assembly includes positioning brackets, two of which are fixedly installed on both sides of the end of the telescopic slide rod. The positioning brackets are used to lock the sprocket body as the telescopic slide rod moves down. The end of the telescopic slide rod is provided with an adjustment assembly for adjusting the placement position of the sprocket body so that the sprocket body and the telescopic slide rod remain coaxial.

[0016] Preferably, the adjustment assembly includes a positioning end, a slide rod is fixed to the end of the positioning end, the slide rod is slidably installed inside the telescopic slide rod, and a spring body is fixedly installed between the end of the slide rod and the inside of the telescopic slide rod. Two arc-shaped inserts are rotatably connected to the end of the positioning end away from the slide rod, and a return spring is provided between the arc-shaped inserts and the positioning end.

[0017] Preferably, the end of the positioning head is tapered, and the arc-shaped inserts on both sides are symmetrical to each other.

[0018] This invention provides a sprocket inspection gauge. Compared with the prior art, it has the following advantages:

[0019] (1) This sprocket inspection gauge, through the cooperation of the detection rod and the detection end, can make the detection end run along the tooth edge of the sprocket body through the operation of the detection frame during the detection process. By monitoring the feedback value of the feedback circuit, the tooth groove and tooth angle of the sprocket body can be measured and processed. Compared with the traditional measurement method, it is more convenient and effectively improves the measurement efficiency and measurement accuracy of the equipment.

[0020] (2) This sprocket inspection gauge can be adapted to measure sprocket bodies of different sizes by adjusting the extension length of the inner slide bar and the position of the detection rod, thereby improving the ease of operation and applicability of the equipment.

[0021] (3) The sprocket inspection gauge can automatically lock the sprocket body by means of the locking component and the adjustment component, and can also automatically adjust the placement position of the sprocket body so that it always remains coaxial with the telescopic slide rod during measurement, which further ensures the accuracy of subsequent measurements. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 Schematic diagram of cross-section structure;

[0024] Figure 3 This is a cross-sectional view of the sprocket body and telescopic slide bar of the present invention;

[0025] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle;

[0026] Figure 5 For the present invention Figure 3 Enlarged structural diagram at point B;

[0027] Figure 6 This is a schematic diagram of the detection rod structure of the present invention;

[0028] Figure 7 This is a schematic cross-sectional view of the detection end of the present invention;

[0029] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point C.

[0030] In the diagram: 1. Measuring instrument body; 2. Sprocket body; 3. Control panel; 4. Positioning frame; 5. Telescopic slide bar; 501. Positioning pressure frame; 6. Drive cylinder; 7. Positioning end; 701. Slide bar; 702. Spring body; 8. Arc-shaped insert plate; 801. Return spring; 9. Conical positioning frame; 901. Anti-slip sleeve; 10. Detection frame; 1001. Transmission tooth groove; 11. Detection rod; 1101. Limiting shaft; 1102. Positioning nut; 12. Transmission end; 13. Limiting sleeve; 1301. Mounting frame; 1302. Locking nut; 14. Adjusting end; 15. Drive motor; 1501. Drive gear; 16. Detection end; 17. Mounting sleeve; 1701. Slide groove; 18. Inner slide bar; 1801. Spherical body; 1802. Support spring; 1803. Limiting rod; 1804. Fixing nut. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1-8 The present invention provides two technical solutions, specifically including the following embodiments:

[0033] Example 1: Reference Figures 1-8 A sprocket inspection gauge includes a gauge body 1, a positioning frame 4 installed inside the gauge body 1, and a telescopic slide rod 5 slidably installed inside the positioning frame 4. A detection frame 10 is rotatably sleeved on the outer side of the telescopic slide rod 5, and a detection rod 11 is rotatably connected to the end of the detection frame 10. A drive cylinder 6 is fixed inside the gauge body 1. The drive cylinder 6 is an existing hydraulic cylinder, and its piston end is fixedly connected to the telescopic slide rod 5 for driving the telescopic slide rod 5 to slide up and down inside the gauge body 1.

[0034] Furthermore, a detection end 16 is fixed to the end of the detection rod 11. The detection end 16 is used to contact the sprocket body 2 as the detection frame 10 and the telescopic slide rod 5 move downwards. When the detection end 16 rotates with the detection frame 10, it enables the detection rod 11 to contact the tooth groove of the sprocket body 2 and rotate under force. (Refer to...) Figure 3 The detection rod 11 is in the detection state with the sprocket body 2. At this time, the end of the detection rod 11 is located in the tooth groove of the sprocket body 2. When the detection rod 11 rotates with the detection frame 10, the detection rod 11 is subjected to force and rotates along the contact position with the detection frame 10. At this time, the detection end 16 can move with the detection rod 11 and always contact the tooth edge of the sprocket body 2 to realize the detection process.

[0035] Specifically, the inside of the detection end 16 is fixed with multiple mounting sleeves 17, and multiple inner slide rods 18 are installed inside the mounting sleeves 17. The ends of the inner slide rods 18 are rotatably connected to spherical bodies 1801 for contacting the tooth grooves of the sprocket body 2. When the detection end 16 moves with the detection rod 11, it will simultaneously drive the multiple mounting sleeves 17 and the inner slide rods 18 to move, so that the multiple spherical bodies 1801 can move along the tooth edge of the sprocket body 2 to perform the detection operation.

[0036] Specifically, the testing frame 10 is equipped with a feedback module for monitoring the rotation frequency and rotation angle of the testing rod 11. The feedback module includes a limiting sleeve 13, with mounting brackets 1301 fixed on both sides of the limiting sleeve 13. The mounting brackets 1301 are slidably installed inside the testing frame 10, and the ends of the mounting brackets 1301 are rotatably connected to the testing rod 11. The end of the testing rod 11 is fixed with a transmission end head 12, and the end of the transmission end head 12 is slidably connected inside the limiting sleeve 13. An adjusting end head 14 is slidably assembled inside the limiting sleeve 13. A locking nut 1302 is provided on the outside of the limiting sleeve 13 to lock the position of the adjusting end head 14. A control panel 3 is installed on the outside of the measuring instrument body 1. A feedback circuit is provided between the multiple spherical bodies 1801 and the control panel 3. A feedback circuit is also provided between the transmission end head 12 and the adjusting end head 14 and the control panel 3.

[0037] Specifically, the feedback circuit mentioned above is a series circuit, that is, a series circuit is provided between multiple inner slide rods 18 and spherical body 1801 sprocket body 2. Based on the existing PLC control module, the monitoring is realized. When the spherical body 1801 contacts the sprocket body 2, the corresponding series circuit can be connected. Therefore, when the telescopic slide rod 5 rotates at a constant speed, it is only necessary to record the number of times the corresponding series circuit is connected and the connection frequency to determine whether the spherical body 1801 is in contact with the tooth groove of the sprocket body 2 during operation, which is used to determine whether the tooth groove size meets the production requirements.

[0038] Specifically, when there are missing parts or excessive size inside the tooth groove of the sprocket body 2, the series circuit will be disconnected when the spherical body 1801 runs to the specific position. Therefore, the number of times the series circuit is connected and the connection frequency are made into a curve statistical graph, which can better determine the pass rate of the sprocket body 2.

[0039] Specifically, the adjustment end 14 and the transmission end 12 inside the limiting sleeve 13 are also connected in series. When the detection end 16 at the end of the detection rod 11 runs along the tooth edge of the sprocket body 2, as the sprocket body 2 passes over the teeth, the detection rod 11 is forced to rotate the transmission end 12 until the transmission end 12 contacts the adjustment end 14. At this time, the series circuit is connected. Therefore, when the telescopic slide rod 5 rotates at a constant speed, it is only necessary to record the number of times the corresponding series circuit is connected and the frequency of connection to determine whether the teeth of the sprocket body 2 are too large or too small.

[0040] Specifically, a drive motor 15 is fixed to the outside of the telescopic slide bar 5 to drive the detection frame 10 to rotate outside the telescopic slide bar 5. A drive gear 1501 is fixedly sleeved at the output end of the drive motor 15. A transmission tooth groove 1001 is opened inside the detection frame 10. The drive gear 1501 meshes with the transmission tooth groove 1001. When the drive motor 15 runs, the detection frame 10 can be driven to run through the meshing of the drive gear 1501 and the transmission tooth groove 1001.

[0041] A support spring 1802 is fixedly installed between the end of the inner slide rod 18 away from the spherical body 1801 and the inside of the mounting sleeve 17.

[0042] Limiting shafts 1101 are rotatably mounted on both ends of the detection rod 11. The limiting shafts 1101 are slidably connected to the detection frame 10, and each limiting shaft 1101 is equipped with a spring to drive the detection rod 11 to reset, so that the detection rod 11 can drive the detection end 16 to always run along the tooth edge of the sprocket body 2. Each end of the limiting shaft 1101 is fitted with a positioning nut 1102 for locking.

[0043] Specifically, the top surface of the sleeve 17 is provided with a groove 1701, and a limiting rod 1803 is fixedly installed at the end of the inner slide rod 18. The limiting rod 1803 is slidably installed inside the groove 1701, and a fixing nut 1804 for locking is sleeved at the end of the limiting rod 1803. The extension length of the inner slide rod 18 is adjusted by the cooperation of the limiting rod 1803 and the fixing nut 1804, so that it can be used to perform inspection operations on tooth grooves of different depths.

[0044] Similarly, the position of the adjusting end 14 can be adjusted by engaging the locking nut 1302, making it suitable for testing teeth of different sizes.

[0045] Similarly, with the cooperation of the limiting shaft 1101, the position of the detection rod 11 can be adjusted so that it can be used to perform detection operations on sprocket bodies 2 of different diameters;

[0046] Furthermore, the measuring instrument body 1 is provided with a locking component inside, which is used to position the placed sprocket body 2. The locking component includes a conical positioning frame 9, which is fixed inside the measuring instrument body 1 and is used to fit the sprocket body 2 onto the outside of the conical positioning frame 9. An anti-slip sleeve 901 is fixedly installed on the outside of the conical positioning frame 9. The conical positioning frame 9 is connected to the measuring instrument body 1 by a thread, which is used to replace the conical positioning frame 9 according to the different sizes of sprocket bodies 2.

[0047] Example 2: Based on Example 1, with reference to Figures 1-8 A sprocket inspection gauge includes a gauge body 1, a positioning frame 4 installed inside the gauge body 1, and a telescopic slide rod 5 slidably installed inside the positioning frame 4. A detection frame 10 is rotatably sleeved on the outer side of the telescopic slide rod 5, and a detection rod 11 is rotatably connected to the end of the detection frame 10. A drive cylinder 6 is fixed inside the gauge body 1. The drive cylinder 6 is an existing hydraulic cylinder, and its piston end is fixedly connected to the telescopic slide rod 5 for driving the telescopic slide rod 5 to slide up and down inside the gauge body 1.

[0048] Furthermore, a detection end 16 is fixed to the end of the detection rod 11. The detection end 16 is used to contact the sprocket body 2 as the detection frame 10 and the telescopic slide rod 5 move downwards. When the detection end 16 rotates with the detection frame 10, it enables the detection rod 11 to contact the tooth groove of the sprocket body 2 and rotate under force. (Refer to...) Figure 3 The detection rod 11 is in the detection state with the sprocket body 2. At this time, the end of the detection rod 11 is located in the tooth groove of the sprocket body 2. When the detection rod 11 rotates with the detection frame 10, the detection rod 11 is subjected to force and rotates along the contact position with the detection frame 10. At this time, the detection end 16 can move with the detection rod 11 and always contact the tooth edge of the sprocket body 2 to realize the detection process.

[0049] Specifically, the inside of the detection end 16 is fixed with multiple mounting sleeves 17, and multiple inner slide rods 18 are installed inside the mounting sleeves 17. The ends of the inner slide rods 18 are rotatably connected to spherical bodies 1801 for contacting the tooth grooves of the sprocket body 2. When the detection end 16 moves with the detection rod 11, it will simultaneously drive the multiple mounting sleeves 17 and the inner slide rods 18 to move, so that the multiple spherical bodies 1801 can move along the tooth edge of the sprocket body 2 to perform the detection operation.

[0050] Specifically, the testing frame 10 is equipped with a feedback module for monitoring the rotation frequency and rotation angle of the testing rod 11. The feedback module includes a limiting sleeve 13, with mounting brackets 1301 fixed on both sides of the limiting sleeve 13. The mounting brackets 1301 are slidably installed inside the testing frame 10, and the ends of the mounting brackets 1301 are rotatably connected to the testing rod 11. The end of the testing rod 11 is fixed with a transmission end head 12, and the end of the transmission end head 12 is slidably connected inside the limiting sleeve 13. An adjusting end head 14 is slidably assembled inside the limiting sleeve 13. A locking nut 1302 is provided on the outside of the limiting sleeve 13 to lock the position of the adjusting end head 14. A control panel 3 is installed on the outside of the measuring instrument body 1. A feedback circuit is provided between the multiple spherical bodies 1801 and the control panel 3. A feedback circuit is also provided between the transmission end head 12 and the adjusting end head 14 and the control panel 3.

[0051] Specifically, the feedback circuit mentioned above is a series circuit, that is, a series circuit is provided between multiple inner slide rods 18 and spherical body 1801 sprocket body 2. Based on the existing PLC control module, the monitoring is realized. When the spherical body 1801 contacts the sprocket body 2, the corresponding series circuit can be connected. Therefore, when the telescopic slide rod 5 rotates at a constant speed, it is only necessary to record the number of times the corresponding series circuit is connected and the connection frequency to determine whether the spherical body 1801 is in contact with the tooth groove of the sprocket body 2 during operation, which is used to determine whether the tooth groove size meets the production requirements.

[0052] Specifically, when there are missing parts or excessive size inside the tooth groove of the sprocket body 2, the series circuit will be disconnected when the spherical body 1801 runs to the specific position. Therefore, the number of times the series circuit is connected and the connection frequency are made into a curve statistical graph, which can better determine the pass rate of the sprocket body 2.

[0053] Specifically, the adjustment end 14 and the transmission end 12 inside the limiting sleeve 13 are also connected in series. When the detection end 16 at the end of the detection rod 11 runs along the tooth edge of the sprocket body 2, as the sprocket body 2 passes over the teeth, the detection rod 11 is forced to rotate the transmission end 12 until the transmission end 12 contacts the adjustment end 14. At this time, the series circuit is connected. Therefore, when the telescopic slide rod 5 rotates at a constant speed, it is only necessary to record the number of times the corresponding series circuit is connected and the frequency of connection to determine whether the teeth of the sprocket body 2 are too large or too small.

[0054] Specifically, a drive motor 15 is fixed to the outside of the telescopic slide bar 5 to drive the detection frame 10 to rotate outside the telescopic slide bar 5. A drive gear 1501 is fixedly sleeved at the output end of the drive motor 15. A transmission tooth groove 1001 is opened inside the detection frame 10. The drive gear 1501 meshes with the transmission tooth groove 1001. When the drive motor 15 runs, the detection frame 10 can be driven to run through the meshing of the drive gear 1501 and the transmission tooth groove 1001.

[0055] A support spring 1802 is fixedly installed between the end of the inner slide rod 18 away from the spherical body 1801 and the inside of the mounting sleeve 17.

[0056] Limiting shafts 1101 are rotatably mounted on both ends of the detection rod 11. The limiting shafts 1101 are slidably connected to the detection frame 10, and each limiting shaft 1101 is equipped with a spring to drive the detection rod 11 to reset, so that the detection rod 11 can drive the detection end 16 to always run along the tooth edge of the sprocket body 2. Each end of the limiting shaft 1101 is fitted with a positioning nut 1102 for locking.

[0057] Specifically, the top surface of the sleeve 17 is provided with a groove 1701, and a limiting rod 1803 is fixedly installed at the end of the inner slide rod 18. The limiting rod 1803 is slidably installed inside the groove 1701, and a fixing nut 1804 for locking is sleeved at the end of the limiting rod 1803. The extension length of the inner slide rod 18 is adjusted by the cooperation of the limiting rod 1803 and the fixing nut 1804, so that it can be used to perform inspection operations on tooth grooves of different depths.

[0058] Similarly, the position of the adjusting end 14 can be adjusted by engaging the locking nut 1302, making it suitable for testing teeth of different sizes.

[0059] Similarly, with the cooperation of the limiting shaft 1101, the position of the detection rod 11 can be adjusted so that it can be used to perform detection operations on sprocket bodies 2 of different diameters;

[0060] Furthermore, the measuring instrument body 1 is provided with a locking component inside, which is used to position the placed sprocket body 2. The locking component includes a positioning pressure frame 501. There are two positioning pressure frames 501, which are respectively fixedly installed on both sides of the end of the telescopic slide rod 5. The positioning pressure frame 501 is used to lock the sprocket body 2 as the telescopic slide rod 5 moves down. The end of the telescopic slide rod 5 is provided with an adjustment component, which is used to adjust the placement position of the sprocket body 2 so that the sprocket body 2 and the telescopic slide rod 5 remain coaxial.

[0061] The adjustment assembly includes a positioning end 7, with a slide rod 701 fixed to the end of the positioning end 7. The slide rod 701 is slidably installed inside the telescopic slide rod 5, and a spring body 702 is fixedly installed between the end of the slide rod 701 and the inside of the telescopic slide rod 5. Two arc-shaped inserts 8 are rotatably connected to the end of the positioning end 7 away from the slide rod 701, and a return spring 801 is provided between the arc-shaped inserts 8 and the positioning end 7. When the positioning end 7 moves down and inserts into the sprocket body 2, the two arc-shaped inserts 8 can contact the sprocket body 2, and through the cooperation of the return springs 801, push the sprocket body 2 to adjust the placement position of the sprocket body 2 until the positioning pressure frame 501 contacts the sprocket body 2 to complete the locking operation, ensuring the accuracy of subsequent testing, and improving the ease of use of the equipment. The end of the positioning end 7 is tapered, and the arc-shaped inserts 8 on both sides are symmetrical.

[0062] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0063] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A sprocket inspection gauge, comprising a gauge body (1), characterized in that: The measuring instrument body (1) is equipped with a positioning frame (4), and a telescopic slide rod (5) is slidably installed inside the positioning frame (4). A detection frame (10) is rotatably sleeved on the outside of the telescopic slide rod (5), and a detection rod (11) is rotatably connected to the end of the detection frame (10). The end of the detection rod (11) is fixed with a detection end (16). The detection end (16) is used to contact the sprocket body (2) as the detection frame (10) and telescopic slide rod (5) move down. When the detection end (16) rotates with the detection frame (10), the detection rod (11) can be made to contact the tooth groove of the sprocket body (2) and rotate under force. Multiple mounting cylinders (17) are fixed inside the detection end (16), and multiple inner slide rods (18) are installed inside the mounting cylinders (17). The ends of the inner slide rods (18) are rotatably connected to a ball (1801) for contact with the tooth groove of the sprocket body (2). The detection frame (10) is equipped with a feedback module for monitoring the rotation frequency and rotation angle of the detection rod (11). The feedback module includes a limit sleeve (13). Mounting brackets (1301) are fixed on both sides of the limit sleeve (13). The mounting brackets (1301) are slidably installed inside the detection frame (10), and the end of the mounting brackets (1301) is rotatably connected to the detection rod (11). The end of the detection rod (11) is fixed with a transmission end head (12), and the end of the transmission end head (12) is slidably connected inside the limit sleeve (13). An adjustment end head (14) is slidably assembled inside the limit sleeve (13). A locking nut (1302) is provided on the outside of the limit sleeve (13) to lock the position of the adjustment end head (14). A control panel (3) is installed on the outside of the measuring instrument body (1). A feedback circuit is provided between multiple spherical bodies (1801) and the control panel (3). A feedback circuit is provided between the transmission end (12) and the adjustment end (14) and the control panel (3). Multiple inner slide rods (18), spherical bodies (1801) and sprocket body (2) are connected in series. When the spherical body (1801) contacts the sprocket body (2), the corresponding series circuit can be connected. Therefore, when the telescopic slide rod (5) rotates at a constant speed, it is only necessary to record the number of times the corresponding series circuit is connected and the frequency of connection to determine whether the spherical body (1801) is in contact with the tooth groove of the sprocket body (2) during operation, which is used to determine whether the tooth groove size meets the production requirements. The adjustment end (14) and the transmission end (12) inside the limiting sleeve (13) are also connected in series. When the detection end (16) at the end of the detection rod (11) runs along the tooth edge of the sprocket body (2), as the sprocket body (2) passes over the teeth, the detection rod (11) is forced to drive the transmission end (12) to rotate until the transmission end (12) contacts the adjustment end (14). At this time, the series circuit is connected. Therefore, when the telescopic slide rod (5) rotates at a constant speed, it is only necessary to record the number of times the corresponding series circuit is connected and the connection frequency to determine whether the teeth of the sprocket body (2) are too large or too small.

2. The sprocket inspection gauge according to claim 1, characterized in that: A drive motor (15) is fixed on the outside of the telescopic slide rod (5) to drive the detection frame (10) to rotate on the outside of the telescopic slide rod (5). A drive gear (1501) is fixedly sleeved on the output end of the drive motor (15). A transmission tooth groove (1001) is opened inside the detection frame (10). The drive gear (1501) meshes with the transmission tooth groove (1001).

3. The sprocket inspection gauge according to claim 1, characterized in that: The top surface of the sleeve (17) of the assembly is provided with a sliding groove (1701), and the end of the inner sliding rod (18) is fixedly installed with a limiting rod (1803). The limiting rod (1803) is slidably installed inside the sliding groove (1701), and the end of the limiting rod (1803) is sleeved with a fixing nut (1804) for locking.

4. A sprocket inspection gauge according to claim 3, characterized in that: A support spring (1802) is fixedly installed between the end of the inner slide rod (18) away from the spherical body (1801) and the inside of the mounting sleeve (17).

5. A sprocket inspection gauge according to claim 1, characterized in that: The detection rod (11) has a limit shaft (1101) rotatably installed on both ends. The limit shaft (1101) is slidably connected to the detection frame (10), and the limit shaft (1101) is equipped with a spring inside to drive the detection rod (11) to reset. The end of the limit shaft (1101) is fitted with a positioning nut (1102) for locking.

6. A sprocket inspection gauge according to claim 1, characterized in that: The measuring instrument body (1) is provided with a locking component inside, which is used to position the placed sprocket body (2). The locking component includes a conical positioning frame (9), which is fixed inside the measuring instrument body (1) and is used to fit the sprocket body (2) on the outside of the conical positioning frame (9). An anti-slip sleeve (901) is fixedly installed on the outside of the conical positioning frame (9).

7. A sprocket inspection gauge according to claim 6, characterized in that: The conical positioning frame (9) is connected to the measuring tool body (1) by a thread, and is used to replace the conical positioning frame (9) according to the different sizes of the sprocket body (2).

8. A sprocket inspection gauge according to claim 6, characterized in that: The locking assembly includes a positioning pressure frame (501). There are two positioning pressure frames (501) and they are respectively fixedly installed on both sides of the end of the telescopic slide rod (5). The positioning pressure frame (501) is used to lock the sprocket body (2) as the telescopic slide rod (5) moves down. The end of the telescopic slide rod (5) is provided with an adjustment assembly for adjusting the placement position of the sprocket body (2) so that the sprocket body (2) and the telescopic slide rod (5) remain coaxial.

9. A sprocket inspection gauge according to claim 8, characterized in that: The adjustment assembly includes a positioning end (7), and a slide rod (701) is fixed to the end of the positioning end (7). The slide rod (701) is slidably installed inside the telescopic slide rod (5), and a spring body (702) is fixedly installed between the end of the slide rod (701) and the inside of the telescopic slide rod (5). Two arc-shaped inserts (8) are rotatably connected to the end of the positioning end (7) away from the slide rod (701), and a return spring (801) is provided between the arc-shaped inserts (8) and the positioning end (7).

10. A sprocket inspection gauge according to claim 9, characterized in that: The end of the positioning head (7) is tapered, and the arc-shaped inserts (8) on both sides are symmetrical to each other.

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