A piston detection tool

Abstract

The utility model discloses a piston detection frock belongs to piston detection technical field. A kind of piston detection frock, including detection table, contact type distance detector, detection table is provided with base, base is provided with the plug rod for storing piston, plug rod is rotatably connected with base;The top of the plug rod is provided with top sleeve, positioning rod is provided on top sleeve, positioning groove that is cooperated with positioning rod is provided in plug rod, and driving block is provided at top sleeve.The utility model provides a kind of piston detection frock, piston is rotated by driving motor, after piston rotates certain angle, contact type distance detector detects the perpendicularity of piston again, so, the perpendicularity numerical measurement work of multiple point positions of piston outer wall can be carried out, the perpendicularity value obtained is more accurate, the perpendicularity condition of piston is judged, piston is rotated by driving motor, and the degree of rotation is conveniently controlled.

Description

Technical Field

[0001] This utility model belongs to the field of piston detection technology, and specifically relates to a piston detection tooling. Background Technology

[0002] Precision mechanical parts refer to mechanical components with high manufacturing precision, small dimensional tolerances, and strict surface quality requirements. They are widely used in high-precision equipment, instruments, aerospace, medical devices, automotive industry and other fields.

[0003] The friction surface of the piston is on its side wall. Therefore, the piston's perpendicularity needs to be checked during inspection. Currently, piston perpendicularity is mostly measured by using a contact distance measuring instrument to measure the piston's dimensions at two points, one above and one below, to determine the perpendicularity. However, the piston's working surface is the entire circular outer wall. Therefore, during actual inspection, the piston's angle needs to be manually adjusted to measure perpendicularity data at multiple positions. Manually rotating the piston is inconvenient to control, making it difficult to control the inspection points. Therefore, this application proposes a piston inspection fixture. Utility Model Content

[0004] The purpose of this invention is to provide a piston inspection fixture to solve the problem mentioned in the background art that when inspecting the piston perpendicularity, it is necessary to manually adjust the piston angle and measure the perpendicularity data at multiple positions of the piston. Manually rotating the piston is inconvenient to control the rotation angle and the control of the inspection points.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a piston testing fixture, including a testing platform and a contact distance detector. A base is provided on the testing platform, and a rod for storing the piston is provided on the base. The rod is rotatably connected to the base. The top of the insertion rod is provided with a top sleeve, the top sleeve is provided with a positioning rod, the insertion rod is provided with a positioning groove that cooperates with the positioning rod, and the top sleeve is provided with a driving block; The testing platform is equipped with a drive frame, a drive motor, a moving frame, and a telescopic rod. The drive frame cooperates with the drive block, and the drive frame is connected to the output end of the drive motor. The drive motor is mounted on the moving frame. The testing platform is equipped with a material pushing component and a testing frame. There are at least two testing frames, with the two testing frames located on both sides of the insertion rod. The contact distance detector is installed on the testing frame, and the material pushing component is connected to the testing frame.

[0006] Preferably, there are two positioning slots, and the two positioning slots are arranged in a circumferential array around the center line of the top sleeve.

[0007] Preferably, the size of the drive block is smaller than the size of the top sleeve.

[0008] Preferably, the drive frame is provided with a drive slot, which cooperates with the drive block.

[0009] Preferably, a limiting plate is provided on the drive frame, and an arc-shaped part is provided inside the limiting plate, which cooperates with the outer wall of the top sleeve.

[0010] Preferably, the testing platform is provided with a guide plate and a guide block, the guide plate is provided with a guide groove that cooperates with the guide block, the guide plate is mounted on the testing platform by a support plate, and the drive motor is mounted on the guide block.

[0011] Preferably, four support plates are provided, and the four support plates are respectively located on both sides of the guide plate.

[0012] Preferably, the outer shell of the feeding assembly is provided with a guide rail and a slider, the guide rail and the slider are slidably engaged, the slider is connected to the detection frame, and the guide rail is mounted on the outer shell of the feeding assembly.

[0013] Preferably, the testing frame is provided with two vertically distributed mounting slots, and two contact distance detectors are respectively matched with the two mounting slots.

[0014] Preferably, the insertion rod has a groove, into which a positioning plate and a spring are inserted. The positioning plate is connected to the spring. The cross-section of the positioning plate is T-shaped, and an arc-shaped part is provided on the outer side of the positioning plate. The arc-shaped part has the same shape as the outer wall of the insertion rod. There are two grooves, and the two grooves are arranged in a circumferential array around the center line of the insertion rod.

[0015] Beneficial effects: I. This utility model provides a piston inspection fixture. The pusher assembly can drive the inspection frame to move. The contact distance detector on the inspection frame moves together with the inspection frame. After the contact distance detector contacts the outer wall of the piston, it records the distance information of the piston's outer wall. The contact distance detector is connected to a controller. The contact distance detector can be a Keyence detector, which can measure the positions of two points on the left and right sides of the piston, and then measure the outer diameter of the piston. Based on the deviation of the data from the upper and lower sets of contact distance detectors, the verticality of the piston is judged.

[0016] II. The piston testing fixture provided by this utility model has a telescopic rod that can push a moving frame to move. The drive frame on the moving frame is inserted into the drive block through the telescopic rod. At this time, the drive motor starts and drives the drive frame to rotate. The drive frame drives the drive block, top sleeve, and insertion rod to rotate, which in turn drives the piston on the insertion rod to rotate. After the piston rotates to a certain angle, the contact distance detector detects the perpendicularity of the piston again. In this way, the perpendicularity values ​​of multiple points on the outer wall of the piston can be measured, and the obtained perpendicularity values ​​are more accurate. The piston is driven to rotate by the drive motor, and the degree of rotation is easy to adjust. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the piston detection fixture in this utility model; Figure 2 This is a side view of the piston detection fixture in this utility model; Figure 3 This is a schematic diagram of the internal structure of the piston detection fixture in this utility model; Figure 4 This utility model Figure 3 A schematic diagram of the structure at point A in the middle.

[0018] Explanation of reference numerals in the attached figures: 1. Testing table; 2. Base; 3. Insert rod; 4. Piston; 5. Top sleeve; 6. Positioning rod; 7. Drive block; 8. Drive frame; 9. Limiting plate; 10. Drive motor; 11. Moving frame; 12. Telescopic rod; 13. Guide plate; 14. Pushing assembly; 15. Testing frame; 16. Contact distance detector; 17. Positioning plate. Detailed Implementation

[0019] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0020] like Figures 1-4 As shown in the figure, the piston detection fixture provided in this embodiment of the present invention includes a detection platform 1 and a contact distance detector 16. The contact distance detector 16 is a measuring device that measures the distance to an object by making a dedicated detector directly contact the object. Since the distance is measured by contact with the detector, it has the advantage of being more accurate than non-contact sensors. A base 2 is provided on the detection platform 1, and a rod 3 for storing a piston 4 is provided on the base 2. The outer diameter of the rod 3 matches the inner diameter of the piston 4, and the rod 3 is rotatably connected to the base 2.

[0021] Specifically, the top of the insertion rod 3 is provided with a top sleeve 5, the top sleeve 5 is provided with a positioning rod 6, and the insertion rod 3 is provided with a positioning groove that cooperates with the positioning rod 6. It should be noted that there are two positioning grooves, and the two positioning grooves are distributed in a circular array around the center line of the top sleeve 5.

[0022] The positioning rod 6 in the top sleeve 5 is inserted into the positioning groove. Therefore, during the rotation of the top sleeve 5, the positioning rod 6 and the positioning groove can drive the insertion rod 3 to rotate.

[0023] In order to drive the top sleeve 5 to rotate, a drive block 7 is provided at the top sleeve 5. The size of the drive block 7 is smaller than the size of the top sleeve 5, that is, the drive block 7 cannot exceed the top sleeve 5. This is because the piston 4 is fitted onto the insert rod 3 from top to bottom. The piston 4 needs to pass through the top sleeve 5 during its fall, so the drive block 7 cannot exceed the top sleeve 5.

[0024] In order to drive the top sleeve 5 to rotate without obstructing the movement of the piston 4, a drive frame 8, a drive motor 10, a moving frame 11, and a telescopic rod 12 are provided on the testing table 1. The drive frame 8 cooperates with the drive block 7. Specifically, the drive frame 8 is provided with a drive groove, which cooperates with the drive block 7. The drive frame 8 is connected to the output end of the drive motor 10. The drive motor 10 is mounted on the moving frame 11. The moving frame 11 is connected to the telescopic rod 12. The telescopic rod 12 can adjust the position of the moving frame 11, thereby moving the drive motor 10 away from the insertion rod 3. The telescopic rod 12 can be a cylinder.

[0025] In order to limit the distance the drive frame 8 moves, a limit plate 9 is provided on the drive frame 8. The limit plate 9 has an arc-shaped part inside, which cooperates with the outer wall of the top sleeve 5.

[0026] To make the drive motor 10 and the moving frame 11 move more smoothly, a guide plate 13 and a guide block are provided on the testing table 1. The guide plate 13 is provided with a guide groove that cooperates with the guide block. The guide plate 13 is installed on the testing table 1 through a support plate. The drive motor 10 is installed on the guide block. There are four support plates, and the four support plates are located on both sides of the guide plate 13.

[0027] The telescopic rod 12 can push the moving frame 11 to move. The drive frame 8 on the moving frame 11 is inserted into the drive block 7 through the telescopic rod 12. At this time, the drive motor 10 starts and can drive the drive frame 8 to rotate. The drive frame 8 drives the drive block 7, the top sleeve 5, and the insertion rod 3 to rotate, which in turn drives the piston 4 on the insertion rod 3 to rotate. After the piston 4 rotates a certain angle, the contact distance detector 16 detects the perpendicularity of the piston 4 again. In this way, the perpendicularity values ​​of multiple points on the outer wall of the piston 4 can be measured, and the obtained perpendicularity values ​​are more accurate.

[0028] To detect the verticality of piston 4, a pusher assembly 14 and a detection frame 15 are provided on the detection table 1. At least two detection frames 15 are provided, with the two detection frames 15 located on both sides of the insertion rod 3. The pusher assembly 14 is connected to the detection frame 15. The pusher assembly 14 is a cylinder. It should be noted that the outer shell of the pusher assembly 14 is provided with a guide rail and a slider. The guide rail and the slider are slidably engaged. The slider is connected to the detection frame 15. The guide rail is installed on the outer shell of the pusher assembly 14. A contact distance detector 16 is installed on the detection frame 15. It should be noted that the detection frame 15 is provided with two vertically distributed mounting slots. The two contact distance detectors 16 are respectively engaged with the two mounting slots. The two contact distance detectors 16 are aligned vertically and face piston 4.

[0029] The pusher assembly 14 can drive the inspection frame 15 to move. The contact distance detector 16 on the inspection frame 15 moves together with the inspection frame 15. After the contact distance detector 16 contacts the outer wall of the piston 4, the contact distance detector 16 records the distance information of the outer wall of the piston 4. The contact distance detector 16 is connected to the controller. The contact distance detector 16 can be a Keyence detector, which can measure the position of two points on the left and right sides of the piston 4, and then measure the outer diameter of the piston 4. Based on the deviation of the data from the upper and lower sets of contact distance detectors 16, the verticality of the piston 4 is judged.

[0030] Since piston 4 is inserted into insert rod 3 via a plug-in connection, there is a certain gap between the inner wall of piston 4 and the outer wall of insert rod 3. To ensure that piston 4 can be smoothly pushed to rotate during the rotation of insert rod 3, a groove is provided inside insert rod 3. A positioning plate 17 and a spring are inserted into the groove. The positioning plate 17 is connected to the spring. The cross-section of positioning plate 17 is T-shaped, and an arc-shaped part is provided on the outer side of positioning plate 17. The arc-shaped part has the same shape as the outer wall of insert rod 3. Under the elastic force of the spring, positioning plate 17 has an outward force. After piston 4 is fitted onto insert rod 3, positioning plate 17 will squeeze piston 4. The squeezing force will increase the friction between positioning plate 17 and piston 4. Therefore, when top sleeve 5 rotates slowly, piston 4 will rotate synchronously with top sleeve 5. A photoelectric encoder detection component for detecting rotation angle is installed at drive motor.

[0031] It should be noted that there are two grooves, and the two grooves are arranged in a circumferential array around the center line of the insertion rod 3. The spring is a metal spring with a length of 2cm and a wire diameter of 6mm. The top of the positioning plate 17 is provided with a chamfered structure to facilitate the entry of the piston 4.

[0032] In summary, this utility model embodiment provides a piston inspection fixture. The pusher assembly 14 can drive the inspection frame 15 to move. The contact distance detector 16 on the inspection frame 15 moves together with the inspection frame 15. After the contact distance detector 16 contacts the outer wall of the piston 4, the contact distance detector 16 records the distance information of the outer wall of the piston 4. The contact distance detector 16 is connected to a controller. The contact distance detector 16 can be a Keyence detector, which can measure the position of two points on the left and right sides of the piston 4, and then measure the outer diameter of the piston 4. Based on the deviation of the data from the upper and lower sets of contact distance detectors 16, the verticality of the piston 4 is determined.

[0033] The telescopic rod 12 can push the moving frame 11 to move. The drive frame 8 on the moving frame 11 is inserted into the drive block 7 through the telescopic rod 12. At this time, the drive motor 10 starts and can drive the drive frame 8 to rotate. The drive frame 8 drives the drive block 7, the top sleeve 5, and the insertion rod 3 to rotate, which in turn drives the piston 4 on the insertion rod 3 to rotate. After the piston 4 rotates a certain angle, the contact distance detector 16 detects the perpendicularity of the piston 4 again. In this way, the perpendicularity values ​​of multiple points on the outer wall of the piston 4 can be measured, and the obtained perpendicularity values ​​are more accurate.

[0034] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A piston testing fixture, comprising a testing table (1) and a contact distance detector (16), characterized in that, The testing platform (1) is provided with a base (2), and the base (2) is provided with a rod (3) for storing the piston (4), and the rod (3) is rotatably connected to the base (2); The top of the insert (3) is provided with a top sleeve (5), a positioning rod (6) is provided on the top sleeve (5), a positioning groove that cooperates with the positioning rod (6) is provided inside the insert (3), and a driving block (7) is provided at the top sleeve (5). The testing platform (1) is provided with a drive frame (8), a drive motor (10), a moving frame (11), and a telescopic rod (12). The drive frame (8) cooperates with the drive block (7), and the drive frame (8) is connected to the output end of the drive motor (10). The drive motor (10) is mounted on the moving frame (11). The testing platform (1) is provided with a pusher assembly (14) and a testing frame (15). There are at least two testing frames (15), with the two testing frames (15) located on both sides of the insertion rod (3). The contact distance detector (16) is installed on the testing frame (15), and the pusher assembly (14) is connected to the testing frame (15).

2. The piston detection fixture as described in claim 1, characterized in that, There are two positioning slots, and the two positioning slots are arranged in a circular array around the center line of the top sleeve (5).

3. The piston detection fixture as described in claim 1, characterized in that, The size of the drive block (7) is smaller than the size of the top sleeve (5).

4. The piston detection fixture as described in claim 1, characterized in that, The drive frame (8) is provided with a drive slot, which cooperates with the drive block (7).

5. The piston detection fixture as described in claim 1, characterized in that, The drive frame (8) is provided with a limiting plate (9), and the limiting plate (9) has an arc-shaped part inside, which cooperates with the outer wall of the top sleeve (5).

6. The piston detection fixture as described in claim 5, characterized in that, The testing platform (1) is provided with a guide plate (13) and a guide block. The guide plate (13) is provided with a guide groove that cooperates with the guide block. The guide plate (13) is installed on the testing platform (1) through a support plate. The drive motor (10) is installed on the guide block.

7. A piston detection fixture as described in claim 6, characterized in that, The support plate is provided in four parts, and the four support plates are respectively located on both sides of the guide plate (13).

8. The piston detection fixture as described in claim 1, characterized in that, The outer shell of the feeding assembly (14) is provided with a guide rail and a slider. The guide rail and the slider slide together, and the slider is connected to the detection frame (15). The guide rail is installed on the outer shell of the feeding assembly (14).

9. A piston detection fixture as described in claim 1, characterized in that, The testing frame (15) has two vertically distributed mounting slots, and two contact distance detectors (16) are respectively matched with the two mounting slots.

10. A piston detection fixture as described in claim 1, characterized in that, The insertion rod (3) is provided with a groove, and a positioning plate (17) and a spring are inserted into the groove. The positioning plate (17) is connected to the spring. The cross-section of the positioning plate (17) is T-shaped. An arc-shaped part is provided on the outside of the positioning plate (17). The arc-shaped part has the same shape as the outer wall of the insertion rod (3). There are two grooves, and the two grooves are arranged in a circular array around the center line of the insertion rod (3).

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