An internal diameter measuring device for parts

Abstract

This utility model provides an internal diameter detection device for parts, including a detection mechanism for detecting the internal diameter of the positioned part to be detected. The device includes a first mounting frame, a first drive cylinder for lifting and lowering, a connecting seat, a mounting block, and a detection module. The first drive cylinder is mounted on the first mounting frame, and the connecting seat connects the drive end of the first drive cylinder to the upper end of the mounting block. The mounting block has a mounting hole penetrating its upper and lower surfaces. The upper end of the detection module is floatingly mounted within the mounting hole and constrained by the connecting seat. This utility model provides an internal diameter detection device for parts that ensures the consistent positioning of the parts to be detected. The floating design of the detection module facilitates concentric alignment with the parts, improving the stability and efficiency of the detection operation.

Description

Technical Field

[0001] This utility model belongs to the field of internal diameter detection technology for hole-type parts, specifically relating to a device for detecting the internal diameter of parts. Background Technology

[0002] The internal diameter inspection of hole-type parts is a key step in ensuring the dimensional accuracy of parts in fields such as mechanical manufacturing and precision machining. Currently, the internal diameter inspection of hole-type parts is mostly done manually. For example, according to the accuracy requirements of the parts, the operator uses calipers, micrometers or the limit dimensions of go gauges and no-go gauges to determine whether the internal diameter is qualified.

[0003] However, in practical applications, it has been found that manual inspection operations are highly repetitive, affecting the efficiency of the inspection work, and the force applied during concentric alignment is not accurately controlled, which can easily damage parts. Summary of the Invention

[0004] To address the shortcomings of the prior art, this utility model provides an inner diameter detection device for parts, which can ensure the positioning consistency of the parts to be detected. The detection module has a floating design, which makes it easy to achieve concentric alignment with the parts to be detected, thereby improving the stability and efficiency of the detection operation.

[0005] The technical effects to be achieved by this utility model are realized through the following technical aspects:

[0006] This utility model provides a device for measuring the inner diameter of parts, comprising:

[0007] A conveying mechanism used for transporting parts to be inspected;

[0008] The first sensing mechanism is used to sense the arrival of the part to be detected on the conveying mechanism;

[0009] A blocking mechanism is used to block the continued transmission of the conveying mechanism after the first sensing mechanism senses the part to be detected.

[0010] A positioning mechanism is used to position the part to be detected after the first sensing mechanism senses it.

[0011] The testing mechanism is used to test the inner diameter of the part to be tested after positioning. It includes a first mounting frame, a first drive cylinder for lifting and driving, a connecting seat, a mounting block and a testing module. The first drive cylinder is disposed on the first mounting frame, and the connecting seat connects the drive end of the first drive cylinder and the upper end of the mounting block.

[0012] The mounting block has mounting holes that penetrate its upper and lower surfaces. The upper end of the detection module is floatingly mounted in the mounting holes and is constrained by the connecting seat.

[0013] In some implementations, the detection module includes a connector, a connecting sleeve, and a go / no-go gauge for inner diameter detection;

[0014] The upper end of the connector is floatingly installed in the mounting hole, the lower end of the connector is connected to the upper end of the connecting sleeve, and the lower end of the connecting sleeve is connected to the upper end of the go / no-go gauge. The connecting sleeve is set to establish the connection between the connector and the go / no-go gauge, and to facilitate the disassembly and replacement of the go / no-go gauge, so as to adapt to the inspection needs of parts of different sizes and improve the versatility of the inspection equipment.

[0015] In some implementations, the mounting hole includes a first through hole and a second through hole that are connected to each other, the first through hole being located at the upper end of the second through hole, and the diameter of the first through hole being larger than the diameter of the second through hole;

[0016] The upper end of the connector forms a limiting step, and the limiting step is floatingly installed in the first through hole;

[0017] The upper end of the limiting step is constrained by the connecting seat, and the lower end of the limiting step is constrained by the second through hole. By means of the different hole diameters of the first through hole and the second through hole, as well as the limiting step design of the connector, the limiting function of sliding installation of the connector is achieved.

[0018] In some implementations, the positioning mechanism includes a second mounting bracket, a second drive cylinder for lifting and lowering, and a positioning module;

[0019] The second drive cylinder is mounted on the second mounting bracket, and the positioning module is connected to the drive end of the second drive cylinder. The positioning module moves downward under the drive of the second drive cylinder to position the part.

[0020] In some implementations, the positioning module includes a connecting plate and a positioning block, one end of the connecting plate is connected to the driving end of the second driving cylinder, and the other end of the connecting plate is connected to the positioning block;

[0021] The positioning block has a U-shaped opening, and the part to be inspected is confined within the U-shaped opening. The U-shaped opening limits the position of the part in multiple directions, so as to facilitate the concentric alignment of the inspection module and improve the efficiency of the inspection operation.

[0022] In some implementations, the blocking mechanism includes a third mounting bracket, a third drive cylinder for lateral movement, and a blocking block;

[0023] The third drive cylinder is mounted on the third mounting bracket. The blocking block is connected to the drive end of the third drive cylinder. The blocking block extends under the driving action of the third drive cylinder and blocks the parts on the conveying mechanism.

[0024] In some implementations, the end of the blocking block away from the third drive cylinder has a sharp corner structure. The sharp corner structure is easy to insert between two adjacent parts, and plays a separating role between the two parts, that is, it plays a blocking role for the next part to be tested.

[0025] In some implementations, a stop block is provided at the end of the conveying path of the conveying mechanism;

[0026] The stop block has a contour groove that matches the shape of the part, which is used to block the transmission of the part so that the operator can unload the part that has been inspected.

[0027] In some implementations, the first sensing mechanism includes a photoelectric emitting module and a photoelectric receiving module;

[0028] The photoelectric transmitting module and the photoelectric receiving module are positioned opposite each other on both sides of the transmission path of the transmission mechanism. Through the cooperation of the photoelectric transmitting module and the photoelectric receiving module, the arrival of the part is sensed.

[0029] In some implementations, a second sensing mechanism is also included;

[0030] The second sensing mechanism is located at the front end of the conveying path of the conveying mechanism to sense whether there is a shortage of material, so that the operator can replenish the material in a timely manner.

[0031] In summary, this utility model has at least the following advantages:

[0032] 1. The present invention provides an inner diameter detection device for parts. By setting a first sensing mechanism to sense the arrival of the part to be detected on the conveying mechanism, a positioning mechanism is used to position the part to be detected, ensuring the consistency of the positioning of the part to be detected and improving the stability and efficiency of the detection operation.

[0033] 2. The present invention provides an inner diameter detection device for parts, which has a floating design in the detection module, making it easy to be concentrically aligned with the part to be detected, thereby improving the stability and efficiency of the detection operation. Attached Figure Description

[0034] Figure 1 and Figure 2 This is a schematic diagram of the structure of the detection device provided in Embodiment 1 of this utility model;

[0035] Figure 3 A cross-sectional view of the mounting base and detection module provided in Embodiment 1 of this utility model;

[0036] Figure 4A cross-sectional view of the mounting base provided in Embodiment 1 of this utility model;

[0037] Figure 5 A cross-sectional view of the connector provided in Embodiment 1 of this utility model;

[0038] Figure 6 This is a schematic diagram of the positioning mechanism provided in Embodiment 2 of the present invention;

[0039] Figure 7 This is a schematic diagram of the blocking mechanism provided in Embodiment 3 of this utility model;

[0040] Figure 8 This is a schematic diagram of the positioning mechanism provided in Embodiment 3 of this utility model;

[0041] Marked in the image:

[0042] 100. Conveying mechanism;

[0043] 200. First sensing mechanism; 210. Photoelectric transmitting module; 220. Photoelectric receiving module;

[0044] 300, blocking mechanism; 310, third mounting bracket; 320, third drive cylinder; 330, blocking block;

[0045] 400, Positioning mechanism; 410, Second mounting bracket; 420, Second drive cylinder; 430, Positioning module; 431, Connecting plate; 432, Positioning block; 4321, U-shaped opening;

[0046] 500. Testing mechanism; 510. First mounting bracket; 520. First drive cylinder; 530. Connecting seat; 540. Mounting block; 541. Mounting hole; 5411. First through hole; 5412. Second through hole; 550. Testing module; 551. Connector; 5511. Limiting step; 552. Connecting sleeve; 553. Go / no-go gauge;

[0047] 600, stop block; 610, contour groove;

[0048] 700. Second sensing mechanism. Detailed Implementation

[0049] To facilitate understanding of the present invention, a more comprehensive description will be given below in conjunction with the accompanying drawings and specific embodiments. The drawings illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0050] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0051] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0053] Example 1:

[0054] Please see Figures 1-5 An inner diameter detection device for parts includes a conveying mechanism 100 for conveying the part to be detected; a first sensing mechanism 200 for sensing the position of the part to be detected on the conveying mechanism 100; a blocking mechanism 300 for blocking the continued conveying of the part by the conveying mechanism 100 after the first sensing mechanism 200 senses the part to be detected; a positioning mechanism 400 for positioning the part to be detected after the first sensing mechanism 200 senses the part to be detected; and a detection mechanism 500 for detecting the inner diameter of the positioned part to be detected.

[0055] In actual operation, the parts to be tested can be placed on the conveying mechanism 100 by operators or automatic feeding robots. When the parts to be tested are conveyed to the position of the first sensing mechanism 200 under the action of the conveying mechanism 100, the first sensing mechanism 200 senses the parts to be tested and feeds back the signal to the blocking mechanism 300 and the positioning mechanism 400. The blocking mechanism 300 is activated to prevent the conveying mechanism 100 from continuing to convey subsequent parts to be tested, so as to avoid the subsequent conveyed parts to be tested from affecting the operation of the positioning mechanism 400 and the detection mechanism 500. After the positioning mechanism 400 positions the parts to be tested sensed by the first sensing mechanism 200, the detection mechanism 500 detects the parts to be tested.

[0056] It should be noted that the part used in this embodiment is a hole-type part, specifically, including a base plate and a shaft extending upward from the middle of the base plate, with a through hole opened along the axial direction of the shaft. The detection mechanism 500 is used to detect the diameter of the through hole, that is, the inner diameter of the shaft. During the conveying process, the base plate of the part is placed on the conveying mechanism 100 for conveying. During the detection process, the detection module 550 extends into the through hole of the shaft for detection.

[0057] The detection mechanism 500 includes a first mounting bracket 510, a first drive cylinder 520 for lifting and lowering, a connecting seat 530, a mounting block 540, and a detection module 550. The first drive cylinder 520 is mounted on the first mounting bracket 510, and the connecting seat 530 connects the drive end of the first drive cylinder 520 to the upper end of the mounting block 540. The mounting block 540 has a mounting hole 541 extending through its upper and lower surfaces. The upper end of the detection module 550 is floatingly mounted within the mounting hole 541 and constrained by the connecting seat 530.

[0058] Specifically, the first mounting bracket 510 is mounted on the conveying path of the conveying mechanism 100, and the first driving cylinder 520 is mounted on the first mounting bracket 510 and located above the conveying mechanism 100. The first driving cylinder 520 is used to drive the connecting seat 530 to move the mounting block 540 and the detection module 550 together to descend or rise. For example, under the driving action of the first driving cylinder 520, the detection module 550 moves downward to contact the part and performs inner diameter detection on the part; after the detection is completed, the detection module 550 returns to the initial position under the driving action of the first driving cylinder 520.

[0059] As is known, the connecting seat 530 connects the drive end of the first drive cylinder 520 and the upper end of the mounting block 540. The mounting block 540 has a mounting hole 541 that penetrates its upper and lower end surfaces. In this example, the upper end of the mounting hole 541 is covered by the connecting seat 530. Thus, after the upper end of the detection module 550 is floatingly mounted in the mounting hole 541, when the first drive cylinder 520 drives the detection module 550 to move downwards to be concentrically aligned with the part, the detection module 550 has a floating effect, which facilitates concentric alignment with the part and avoids damage to the detection module 550 or the part by hard contact. It should be noted that this floating effect is limited by the lower end of the connecting seat 530. Specifically, when the upper end of the detection module 550 floats in the mounting hole 541, that is, when it floats to the point of contacting the lower end of the connecting seat 530, the detection module 550 stops floating and concentric alignment is performed.

[0060] In some embodiments, the detection module 550 includes a connector 551, a connecting sleeve 552, and a go / no-go gauge 553 for inner diameter detection. The upper end of the connector 551 is floatingly mounted in the mounting hole 541, the lower end of the connector 551 is connected to the upper end of the connecting sleeve 552, and the lower end of the connecting sleeve 552 is connected to the upper end of the go / no-go gauge 553. The connecting sleeve 552 is provided to establish the connection between the connector 551 and the go / no-go gauge 553, and to facilitate the disassembly and replacement of the go / no-go gauge 553, so as to adapt to the detection requirements of parts of different sizes and improve the versatility of the detection equipment.

[0061] The 553 go / no-go gauge is a commonly used special measuring tool in mechanical manufacturing and quality inspection. Its main function is to determine whether the part is in the go or no-go state. In this embodiment, it can quickly verify whether the inner diameter of the part is within the design fixed tolerance range, thus ensuring the assembly accuracy of the part.

[0062] In this embodiment, the connector 551 passes through the mounting hole 541 of the mounting block 540 from top to bottom, allowing the upper end of the connector 551 to slide relative to the mounting hole 541. The upper end of the connector 551 is constrained by the connecting seat 530. The lower end of the connector 551 is connected to the upper end of the connecting sleeve 552 by a thread. A go / no-go gauge 553 is connected to the lower end of the connecting sleeve 552. Here, the go / no-go gauge 553 and the connecting sleeve 552 are detachably connected. They can be connected by threads or locked by screws. When different sizes of parts are replaced on the production line, the go / no-go gauge 553 can be quickly replaced accordingly to improve disassembly and assembly efficiency and the versatility of the testing equipment.

[0063] In some embodiments, the mounting hole 541 includes a first through hole 5411 and a second through hole 5412 that are connected. The first through hole 5411 is located at the upper end of the second through hole 5412, and the diameter of the first through hole 5411 is larger than the diameter of the second through hole 5412. A limiting step 5511 is formed at the upper end of the connector 551, and the limiting step 5511 is floatingly mounted in the first through hole 5411. The upper end of the limiting step 5511 is constrained by the connector seat 530, and the lower end of the limiting step 5511 is constrained by the second through hole 5412. By means of the different diameter designs of the first through hole 5411 and the second through hole 5412, and the design of the limiting step 5511 of the connector 551, the limiting function of sliding installation of the connector 551 is achieved.

[0064] This embodiment provides an inner diameter detection device for parts. By setting a first sensing mechanism 200 to sense the arrival of the part to be detected on the conveying mechanism 100, the positioning mechanism 400 positions the part to be detected to ensure the positioning consistency of the part to be detected and improve the stability and efficiency of the detection operation. The detection module 550 has a floating design, which makes it easy to be concentrically aligned with the part to be detected, thereby improving the stability and efficiency of the detection operation.

[0065] Example 2:

[0066] This embodiment makes further structural optimizations based on Embodiment 1. Please refer to... Figures 1-5 Based on the above Figure 6 .

[0067] In this embodiment, the positioning mechanism 400 includes a second mounting bracket 410, a second drive cylinder 420 for lifting and lowering, and a positioning module 430. The second drive cylinder 420 is mounted on the second mounting bracket 410, and the positioning module 430 is connected to the drive end of the second drive cylinder 420. The positioning module 430 moves downward under the drive of the second drive cylinder 420 to position the part.

[0068] Specifically, the positioning module 430 includes a connecting plate 431 and a positioning block 432. One end of the connecting plate 431 is connected to the driving end of the second driving cylinder 420, and the other end of the connecting plate 431 is connected to the positioning block 432. A U-shaped opening 4321 is formed on the positioning block 432. The part to be inspected is confined within the U-shaped opening 4321. The U-shaped opening 4321 limits the position of the part in multiple directions, so that the inspection module 550 can perform concentric alignment and improve the efficiency of the inspection operation.

[0069] Referring to the content of Embodiment 1, the part to be tested includes a base plate and a shaft extending upward from the middle of the base plate. During the transmission process, the base plate is placed on the transmission mechanism 100 for transmission. When the first sensing mechanism 200 senses that the part to be tested is in place, the second driving cylinder 420 drives the positioning module 430 to move downward, so that the shaft limit of the part to be tested is located in the U-shaped opening 4321 on the positioning block 432.

[0070] Understandably, the positioning block 432 and the connecting plate 431 are detachably connected. The positioning block 432 can be disassembled and replaced as needed so that the size of the U-shaped opening matches the size of the shaft of the part to be tested, and the shaft of the part to be tested is limited to be located within the U-shaped opening 4321 on the positioning block 432.

[0071] In this embodiment, the positioning mechanism 400 adopts a top-to-bottom moving positioning method. With the help of the U-shaped opening 4321 on the positioning block 432, the part can be quickly positioned and the position of the part can be limited in multiple directions, so as to facilitate the concentric alignment of the detection module 550 and improve the efficiency of the detection operation. At the same time, since the detection module 550 also moves from top to bottom, the stroke of the positioning block 432 can be set to be less than the stroke of the detection module 550. After the first sensing mechanism 200 feeds back the signal that the part to be detected is in place, the positioning mechanism 400 and the detection mechanism 500 act simultaneously, but the positioning block 432 will contact the part to be detected before the detection module 550. That is, it is ensured that the positioning of the detection module 550 is completed first, and then the detection action is performed.

[0072] Example 3:

[0073] This embodiment makes further structural optimizations based on Embodiment 1. Please refer to... Figures 1-5 Based on the above Figure 7 and Figure 8 .

[0074] In this embodiment, the blocking mechanism 300 includes a third mounting bracket 310, a third driving cylinder 320 for lateral movement driving, and a blocking block 330. The third driving cylinder 320 is disposed on the third mounting bracket 310, and the blocking block 330 is connected to the driving end of the third driving cylinder 320. The blocking block 330 extends under the driving action of the third driving cylinder 320 and plays a blocking role on the parts on the conveying mechanism 100.

[0075] When the first sensing mechanism 200 detects that the part to be tested has been transferred to the working position corresponding to the detection mechanism 500, it feeds back a signal to the blocking mechanism 300. The third driving cylinder 320 of the blocking mechanism 300 drives the blocking block 330 to extend laterally to block the conveying mechanism 100 from continuing to transfer subsequent parts to be tested, so as to avoid affecting the detection operation of the detection mechanism 500.

[0076] Specifically, the end of the blocking block 330 away from the third drive cylinder 320 has a sharp corner structure. The sharp corner structure is easy to insert between two adjacent parts, and plays a role in separating the two parts in front and behind, that is, it plays a role in blocking the next part to be tested.

[0077] In some embodiments, a stop block 600 is provided at the end of the conveying path of the conveying mechanism 100; the stop block 600 has a contour groove 610 that matches the shape of the part to block the conveying of the part, so that the operator can unload the part that has been inspected.

[0078] After the part to be inspected is inspected at the inspection mechanism 500, the part continues to be conveyed under the action of the conveying mechanism 100. When the part is conveyed to the end of the conveying mechanism 100, it abuts against the contour groove 610 on the stop block 600, so that it can no longer be conveyed, so that the operator or unloading robot can unload the part at this position.

[0079] In some embodiments, the first sensing mechanism 200 includes a photoelectric emitting module 210 and a photoelectric receiving module 220; the photoelectric emitting module 210 and the photoelectric receiving module 220 are disposed opposite each other on both sides of the conveying path of the conveying mechanism 100, and the positioning of the part is sensed by the cooperation of the photoelectric emitting module 210 and the photoelectric receiving module 220.

[0080] When configured, the photoelectric receiving module 220 can receive a signal from the photoelectric transmitting module 210, indicating that no part to be detected is in place. When the photoelectric receiving module 220 cannot receive a signal from the photoelectric transmitting module 210, it indicates that the part to be detected is in place. In this way, the signal is fed back to the blocking mechanism 300 and the positioning mechanism 400 to perform corresponding operations. Similarly, the signal can also be fed back to the detection mechanism 500 to make the detection mechanism 500 perform synchronous operation.

[0081] In some embodiments, a second sensing mechanism 700 is also included; the second sensing mechanism 700 is disposed at the front end of the conveying path of the conveying mechanism 100 and is used to sense whether there is a shortage of material so that the operator can perform timely replenishment work.

[0082] Specifically, the second sensing mechanism can use the same device as the first sensing mechanism. The difference is that the second sensing mechanism is set to indicate that there is material when the photoelectric receiving module cannot receive the signal from the photoelectric transmitting module.

[0083] This embodiment provides an inner diameter detection device for parts, which has a sharp corner structure on the blocking block to facilitate the separation of two adjacent parts; a material stop block is provided at the end of the conveying mechanism to facilitate the operator to unload the completed parts; and a second sensing mechanism is added to sense whether there is a shortage of material so that the operator can replenish the material in a timely manner.

[0084] The above description is merely an example and illustration of the structure of this invention, and while the description is specific and detailed, it should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these obvious substitutions all fall within the protection scope of this invention.

Claims

1. An inner diameter inspection apparatus for a part, characterized by, include: A conveying mechanism (100) is used for conveying the parts to be inspected; The first sensing mechanism (200) is used to sense the arrival of the part to be tested on the conveying mechanism (100); A blocking mechanism (300) is used to block the continued transmission of the transmission mechanism (100) after the first sensing mechanism (200) senses the part to be detected. A positioning mechanism (400) is used to position the part to be detected after the first sensing mechanism (200) senses the part to be detected; The testing mechanism (500) is used to test the inner diameter of the part to be tested after positioning. It includes a first mounting bracket (510), a first drive cylinder (520) for lifting drive, a connecting seat (530), a mounting block (540) and a testing module (550). The first drive cylinder (520) is mounted on the first mounting bracket (510). The connecting seat (530) connects the drive end of the first drive cylinder (520) and the upper end of the mounting block (540). The mounting block (540) has a mounting hole (541) that extends through its upper and lower surfaces. The upper end of the detection module (550) is floatingly mounted in the mounting hole (541) and is constrained by the connecting seat (530).

2. The inner diameter inspection apparatus for a part according to claim 1, characterized by, The detection module (550) includes a connector (551), a connecting sleeve (552), and a go / no-go gauge (553) for inner diameter detection. The upper end of the connector (551) is floatingly installed in the mounting hole (541), the lower end of the connector (551) is connected to the upper end of the connecting sleeve (552), and the lower end of the connecting sleeve (552) is connected to the upper end of the go / no-go gauge (553).

3. The inner diameter inspection apparatus for a part according to claim 2, characterized by, The mounting hole (541) includes a first through hole (5411) and a second through hole (5412) that are connected to each other. The first through hole (5411) is located at the upper end of the second through hole (5412), and the diameter of the first through hole (5411) is larger than the diameter of the second through hole (5412). The upper end of the connector (551) forms a limiting step (5511), and the limiting step (5511) is floatingly installed in the first through hole (5411). The upper end of the limiting step (5511) is restricted by the connecting seat (530), and the lower end of the limiting step (5511) is restricted by the second through hole (5412).

4. The inner diameter inspection apparatus for a part according to claim 1, characterized by, The positioning mechanism (400) includes a second mounting bracket (410), a second drive cylinder (420) for lifting drive, and a positioning module (430). The second drive cylinder (420) is mounted on the second mounting bracket (410), and the positioning module (430) is connected to the drive end of the second drive cylinder (420).

5. The inner diameter inspection apparatus for a part according to claim 4, characterized by The positioning module (430) includes a connecting plate (431) and a positioning block (432). One end of the connecting plate (431) is connected to the driving end of the second driving cylinder (420), and the other end of the connecting plate (431) is connected to the positioning block (432). A U-shaped opening (4321) is formed on the positioning block (432), and the part to be tested is confined within the U-shaped opening (4321).

6. The device for detecting the inner diameter of a part according to claim 1, characterized in that, The blocking mechanism (300) includes a third mounting bracket (310), a third drive cylinder (320) for lateral movement drive, and a blocking block (330). The third drive cylinder (320) is mounted on the third mounting bracket (310), and the blocking block (330) is connected to the drive end of the third drive cylinder (320).

7. The inner diameter inspection apparatus for a part according to claim 6, characterized by The end of the blocking block (330) away from the third drive cylinder (320) has a sharp corner structure.

8. The inner diameter inspection apparatus for a part according to Claim 1, characterized by, A stop block (600) is provided at the end of the conveying path of the conveying mechanism (100). The baffle block (600) has a contour groove (610) that matches the shape of the part, which is used to block the conveyance of the part.

9. The inner diameter inspection apparatus for a part according to Claim 1, characterized by, The first sensing mechanism (200) includes a photoelectric emitting module (210) and a photoelectric receiving module (220). The photoelectric transmitting module (210) and the photoelectric receiving module (220) are arranged opposite each other on both sides of the transmission path of the transmission mechanism (100).

10. The inner diameter inspection apparatus for a part according to any one of claims 1 to 9, characterized by, It also includes a second sensing mechanism (700); The second sensing mechanism (700) is disposed at the front end of the conveying path of the conveying mechanism (100) and is used to sense whether there is a shortage of material.

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