A multi-point measuring device for the bore of a part under test

Abstract

The utility model discloses a kind of multi-point measurement devices to the bore of part to be measured, including the base of L type, the horizontal plate body of base is provided with the positioning clamping seat for clamping part to be measured, the positioning clamping seat includes the frame slidingly connected on base, the frame front side is provided with two clamps, the inner side of each The clamping module is detachably connected to the clamp. The utility model relates to the technical field of parts detection, positioning clamping seat is linked by electric cylinder and servo motor, realize the synchronous adjustment of front and rear positions and clamping opening, realize the measurement of different size parts, and the center of measured piece is always aligned with measuring instrument axis, improve measurement accuracy. Clamping module uses negative pressure adsorption fixation, convenient to replace, compatible with multiple parts;Adsorption force generated by air hole can prevent part from moving along when measuring instrument exits, enhance repeatability.

Description

Technical Field

[0001] This utility model relates to the field of component testing technology, specifically a multi-point measuring device for the inner hole of a component to be tested. Background Technology

[0002] Existing internal hole measuring devices typically employ fixed clamping seats and a single fixture, which are difficult to adapt to the rapid adjustment of parts of different sizes. The problems arising from this are as follows: the fixed position of the clamping seat makes it impossible to dynamically adjust the center alignment according to the part size, resulting in measurement errors; the clamping force of the fixture is unstable, and the measuring instrument is prone to loosening and tilting, affecting accuracy; the part clamping relies solely on mechanical force, and the part may shift when the measuring instrument is withdrawn, reducing repeatability. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a multi-point measuring device for the inner hole of a part to be measured, which solves the problem that existing inner hole measuring devices use fixed clamping seats and can only measure a single part.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a multi-point measuring device for the inner hole of a part to be measured, comprising an L-shaped base, a linear slide table provided on the vertical plate of the base, a clamp provided on the sliding end of the linear slide table, and a measuring instrument held at the clamping end of the clamp; a positioning clamping seat for clamping the part to be measured is provided on the horizontal plate of the base, the positioning clamping seat comprising a frame slidably connected to the base, an electric cylinder provided on the rear side of the frame for driving it to approach or move away from the measuring instrument, two clamping plates provided on the front side of the frame, the two clamping plates forming a clamping cavity for clamping the part to be measured, and a clamping module detachably connected to the inner side of each clamping plate, the inner wall surface of the clamping module being adapted to the outer wall surface of the part to be measured.

[0005] Preferably, the inner side of the frame is rotatably connected to two main shafts, and a servo motor that drives one of the main shafts to rotate is fixed on the frame. The two main shafts are respectively provided with a first gear and a second gear that mesh with each other. The upper and lower ends of the first gear and the second gear are provided with side rings that are fixed to the main shafts, and the two clamping plates are fixed to the side rings.

[0006] Preferably, the inner side of the clamping plate has a receiving cavity for accommodating the clamping module, and the back of the clamping plate is provided with a flexible tube communicating with the receiving cavity, the flexible tube being connected to a negative pressure generator; the inside of the clamping module has multiple air holes running from front to back.

[0007] Preferably, the bottom circumferential surface of the inner wall of the receiving cavity is provided with a support washer that abuts against the clamping module, and the circumferential wall surface of the receiving cavity is provided with a sealing ring that abuts against the clamping module.

[0008] Preferably, the inner wall surface of the clamping module is provided with a flexible washer in the circumferential direction, and the air hole is located inside the flexible washer.

[0009] Preferably, the clamp includes a base fixed to the sliding end of the linear slide, and a first semi-annular platform and a second semi-annular platform are provided opposite to each other at the front end of the base. The second semi-annular platform is detachably connected to the first semi-annular platform by bolts. The first semi-annular platform and the second semi-annular platform form a clamping cavity for clamping the measuring instrument, and the front end of the first semi-annular platform and the second semi-annular platform has a notch communicating with the clamping cavity.

[0010] Preferably, the inner sides of the first semi-annular platform and the second semi-annular platform are respectively provided with a first plate and a second plate, and the outer side of the second semi-annular platform is provided with a knob for driving the second plate to move closer to or away from the first plate.

[0011] Preferably, both the first and second semi-annular platforms are provided with rubber sheets at the notches. Beneficial effects

[0012] By using the multi-point measuring device for the inner hole of the part to be measured provided by this utility model, the positioning clamping seat is linked by an electric cylinder and a servo motor to realize the synchronous adjustment of the front and rear positions and the clamping opening, enabling the measurement of parts of different sizes, and ensuring that the center of the measured part is always aligned with the axis of the measuring instrument, thereby improving measurement accuracy. The clamping module adopts negative pressure adsorption fixation, which is convenient to replace and compatible with various parts; the adsorption force generated by the air holes can prevent the part from moving when the measuring instrument is withdrawn, enhancing repeatability. Attached Figure Description

[0013] Figure 1 This is an isometric drawing of the present invention; Figure 2 This is the front view of the present utility model; Figure 3 This is a schematic diagram of the internal structure of the frame of this utility model; Figure 4 This is a top view of the present invention; Figure 5 This is a schematic diagram of the meshing connection between the driven gear and the driving gear of this utility model; Figure 6 This is a schematic diagram of the connection structure between the edge ring and the clamping plate of this utility model; Figure 7 This is a schematic diagram of the fixture structure of this utility model.

[0014] Explanation of symbols in the diagram 1. Base, 2. Linear slide, 3. Fixture, 31. First semi-annular stage, 32. Second semi-annular stage, 33. Rubber sheet, 34. Clamping cavity, 35. First plate, 36. Second plate, 37. Knob, 38. Base, 4. Measuring instrument, 5. Frame, 6. Electric cylinder, 7. Clamping plate, 8. Clamping cavity, 9. Clamping module, 10. Side ring body, 11. First gear, 12. Second gear, 13. Servo motor, 14. Hose, 15. Receiving cavity, 16. Air hole, 17. Flexible washer, 18. Support washer, 19. Sealing ring. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Various changes can be made to the implementation scheme as long as the effects of the present invention can be achieved.

[0016] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0017] Reference Figures 1-7 The multi-point measurement device of this implementation plan is described.

[0018] The aforementioned multi-point measuring device for the inner diameter of the part to be measured includes an L-shaped base 1. A positioning clamping seat for holding the part to be measured is mounted on the horizontal plate of the base 1. A linear slide 2 is mounted on the vertical plate of the base 1. A clamp 3 is mounted on the sliding end of the linear slide 2, and a measuring instrument 4, which is an electronic plug gauge, is held in the clamping end of the clamp 3. In actual operation, the part to be measured is placed on the positioning clamping seat; the clamp 3 holds the measuring instrument 4; the linear slide 2 moves up and down, causing the measuring instrument 4 to descend and measure the inner diameter of the part to be measured; after the measurement is completed, the measuring instrument 4 rises to detach from the part to be measured.

[0019] In this embodiment, the clamp 3 includes a base 38 fixed to the sliding end of the linear slide 2. A first semi-annular platform 31 and a second semi-annular platform 32 are disposed opposite each other at the front end of the base 38. The first semi-annular platform 31 is integrally formed with the base 38, and the second semi-annular platform 32 is detachably connected to the first semi-annular platform 31 by bolts. The first semi-annular platform 31 and the second semi-annular platform 32 form a clamping cavity 34 for holding the measuring instrument 4. The front ends of the first semi-annular platform 31 and the second semi-annular platform 32 have notches communicating with the clamping cavity 34. During operation, the relative distance between the second semi-annular platform 32 and the first semi-annular platform 31 is adjusted by bolts so that the notch spacing at the front ends is greater than the outer diameter of the clamped portion of the measuring instrument 4, allowing the measuring instrument 4 to enter the clamping cavity 34 through the notches. Then, the locking bolts clamp and fix the measuring instrument 4 through the first semi-annular platform 31 and the second semi-annular platform 32.

[0020] To improve the clamping stability of the measuring instrument 4 and prevent it from loosening and tilting, a first plate 35 and a second plate 36 are respectively provided on the inner sides of the first semi-annular platform 31 and the second semi-annular platform 32. The first plate 35 is fixedly installed to the first semi-annular platform 31, while the second plate 36 is movably installed on the inner side of the second semi-annular platform 32. A knob 37 is provided on the outer side of the second semi-annular platform 32 to drive the second plate 36 to move closer to or further away from the first plate 35. The rod portion of the knob 37 is threadedly connected to the second semi-annular platform 32, and the end of the rod is rotatably connected to the second plate 36. During operation, rotating the knob 37 causes it to move inward, pushing the second plate 36 inward, thus tightly clamping the measuring instrument 4 between the second plate 36 and the first plate 35.

[0021] Furthermore, rubber sheets 33 are provided at the notches of the first semi-annular platform 31 and the second semi-annular platform 32 to prevent the measuring instrument 4 from being bumped or scratched due to hard contact with the notches of the first semi-annular platform 31 and the second semi-annular platform 32.

[0022] like Figures 1 to 3 The positioning clamping base shown can be adjusted forward and backward in terms of clamping position and opening angle to form multi-point clamping to accommodate parts of different sizes to be measured. Specifically, the positioning clamping base includes a frame 5 slidably connected to a base 1. An electric cylinder 6 is provided on the rear side of the frame 5 to drive it closer to or further away from the measuring instrument 4. Two clamping plates 7 are provided on the front side of the frame 5, forming a clamping cavity 8 for clamping the part to be measured. A clamping module 9 is detachably connected to the inner side of each clamping plate 7, and the inner wall surface of the clamping module 9 is adapted to the outer wall surface of the part to be measured. Depending on the model of the part to be measured, the clamping module 9 can be disassembled and replaced to ensure stable clamping of the part.

[0023] Furthermore, two main shafts are rotatably connected to the inner side of the frame 5. A servo motor 13 that drives one of the main shafts to rotate is fixed on the frame 5. A first gear 11 and a second gear 12 that mesh with each other are respectively provided on the two main shafts. Side rings 10 that are fixed to the main shafts are provided at the upper and lower ends of the first gear 11 and the second gear 12. Two clamping plates 7 are fixed to the side rings 10.

[0024] Specifically, using the above-described configuration, the electric cylinder 6 drives the frame 5 to move back and forth, while the servo motor 13 drives two gears (first gear 11 and second gear 12) to mesh and rotate, causing the two clamping plates 7 to open and close synchronously to adjust their opening degree. For example, to accommodate large-diameter sleeve parts, the electric cylinder 6 drives the frame 5 to move backward, and the servo motor 13 increases the opening degree of the clamping cavity 8 between the two clamping plates 7, so that the clamping cavity 8 can fit the large-diameter sleeve parts, and ensures that the center point of the clamping cavity 8 still corresponds to the central axis of the measuring instrument 4 after the position is changed. When clamping small-diameter sleeve parts, the electric cylinder 6 drives the frame 5 to move forward, and the servo motor 13 decreases the opening degree of the clamping cavity 8 between the two clamping plates 7, so that the clamping cavity 8 can fit the small-diameter sleeve parts, and ensures that the center point of the clamping cavity 8 still corresponds to the central axis of the measuring instrument 4 after the position is changed.

[0025] In this embodiment, to facilitate quick replacement of the clamping module 9 and ensure stable clamping of the part under test, a receiving cavity 15 for accommodating the clamping module 9 is provided on the inner side of the clamping plate 7. A flexible hose 14 communicating with the receiving cavity 15 is provided on the back of the clamping plate 7, and the flexible hose 14 is connected to a negative pressure generator. Multiple air holes 16 extending from front to back are provided inside the clamping module 9. Using negative pressure adsorption, the clamping module 9 is adsorbed and fixed in the receiving cavity 15 during actual operation. Simultaneously, the multiple air holes 16 can apply negative pressure to the front of the clamping module 9, forming a pneumatic adsorption of the part under test.

[0026] Furthermore, to prevent the negative pressure suction from acting outwards, a support washer 18 is circumferentially provided on the bottom inner wall of the receiving cavity 15 to abut against the clamping module 9, and a sealing ring 19 is provided on the circumferential wall of the receiving cavity 15 to abut against the clamping module 9. Specifically, the support washer 18 serves as the first circumferential seal between the clamping module 9 and the receiving cavity 15, and also creates a gap between the clamping module 9 and the bottom of the receiving cavity 15, ensuring that the suction force of the hose 14 can act on each air hole 16 through this gap. The sealing ring 19 serves as the second circumferential seal between the clamping module 9 and the receiving cavity 15, and circumferentially wraps around the clamping module 9 on the inner wall of the receiving cavity 15, increasing the stability of the clamping module 9 after placement.

[0027] In addition, to enhance the negative pressure adsorption and fixation effect of the clamping module 9, a flexible washer 17 is circumferentially arranged on the inner wall surface of the clamping module 9, and the air hole 16 is located inside the flexible washer 17. In this way, after the clamping module 9 clamps the outer wall surface of the part to be tested, the negative pressure adsorption force generated by the air hole 16 is limited to its inner side by the flexible washer 17, thereby increasing the vacuum adsorption and fixation effect.

[0028] It should be noted that the purpose of setting the clamping module 9 with negative pressure adsorption fixation in this embodiment is: after the clamping plate 7 clamps the part to be tested, it can only ensure that the part to be tested will not move laterally. When the measuring instrument 4 rises after measuring the inner diameter of the part to be tested, the negative pressure adsorption can enhance the adsorption fixation effect and prevent the part to be tested from rising along with the measuring instrument 4.

[0029] The working principle of this device is as follows: Before measurement, the electronic plug gauge (measuring instrument 4) is placed into the clamping cavity 34 along the notch. The locking bolt initially secures the measuring instrument 4. Rotating the knob 37 pushes the second plate 36, which, together with the first plate 35, clamps the measuring instrument 4, ensuring its vertical stability. According to the size of the part to be measured, the appropriate clamping module 9 is replaced and fixed in the receiving cavity 15 of the clamping plate 7 by negative pressure adsorption. The electric cylinder 6 drives the frame 5 to move back and forth, and the servo motor 13 drives the gear set (first gear 11, second gear 12) to adjust the opening of the clamping plate 7, so that the center of the clamping cavity 8 is aligned with the axis of the measuring instrument 4. The part to be measured is placed into the clamping cavity 8, the clamping plate 7 closes and clamps the part, and at the same time, negative pressure adsorbs the outer surface of the part through the air hole 16.

[0030] During the measurement process, the linear slide 2 drives the measuring instrument 4 to descend and insert into the inner hole of the part to be measured to detect the inner hole diameter data. After the measurement is completed, the linear slide 2 rises to detach the measuring instrument 4 from the part, and negative pressure adsorption prevents the part from moving upward with the measuring instrument 4.

[0031] When changing to different sizes of the part to be tested, the appropriate clamping module 9 is replaced according to the size of the part to be tested. The electric cylinder 6 drives the frame 5 to move back and forth, and the servo motor 13 drives the gear set (first gear 11, second gear 12) to adjust the opening of the clamping plate 7. The part to be tested is placed into the clamping cavity 8, the clamping plate 7 closes and clamps the part, and at the same time, negative pressure is applied through the air hole 16 to adsorb the outer surface of the part.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-point measuring device for the inner hole of a part to be measured, characterized in that: The device includes an L-shaped base, a linear slide on the vertical plate of the base, a clamp on the sliding end of the linear slide, and a measuring instrument held at the clamping end of the clamp; a positioning clamping seat for holding the part to be measured is provided on the horizontal plate of the base, the positioning clamping seat includes a frame slidably connected to the base, an electric cylinder on the rear side of the frame for driving it to approach or move away from the measuring instrument, two clamping plates on the front side of the frame, the two clamping plates forming a clamping cavity for holding the part to be measured, and a clamping module detachably connected to the inner side of each clamping plate, the inner wall surface of the clamping module being adapted to the outer wall surface of the part to be measured.

2. The multi-point measuring device for the inner hole of the part to be measured according to claim 1, characterized in that: The inner side of the frame is rotatably connected to two main shafts. A servo motor that drives one of the main shafts to rotate is fixed on the frame. The two main shafts are respectively provided with a first gear and a second gear that mesh with each other. The upper and lower ends of the first gear and the second gear are provided with side rings that are fixed to the main shafts. The two clamping plates are fixed to the side rings.

3. The multi-point measuring device for the inner hole of the part to be measured according to claim 1, characterized in that: The clamping plate has an inner cavity for accommodating the clamping module, and a flexible tube communicating with the cavity is provided on the back of the clamping plate. The flexible tube is connected to a negative pressure generator. The clamping module has multiple air holes running from front to back inside.

4. A multi-point measuring device for the inner hole of a part to be measured according to claim 3, characterized in that: The inner wall of the receiving cavity is provided with a support washer that abuts against the clamping module at the bottom circumferential direction, and the circumferential wall of the receiving cavity is provided with a sealing ring that abuts against the clamping module.

5. A multi-point measuring device for the inner hole of a part to be measured according to claim 3, characterized in that: The inner wall of the clamping module is provided with a flexible gasket in the circumferential direction, and the air hole is located inside the flexible gasket.

6. A multi-point measuring device for the inner hole of a part to be measured according to claim 1, characterized in that: The fixture includes a base fixed to the sliding end of the linear slide. A first semi-annular platform and a second semi-annular platform are disposed opposite each other at the front end of the base. The second semi-annular platform is detachably connected to the first semi-annular platform by bolts. The first semi-annular platform and the second semi-annular platform form a clamping cavity for holding the measuring instrument. The front ends of the first semi-annular platform and the second semi-annular platform are formed with notches communicating with the clamping cavity.

7. A multi-point measuring device for the inner hole of a part to be measured according to claim 6, characterized in that: The first semi-circular platform and the second semi-circular platform are respectively provided with a first plate and a second plate on their inner sides, and the second semi-circular platform is provided with a knob on its outer side to drive the second plate to move closer to or away from the first plate.

8. A multi-point measuring device for the inner hole of a part to be measured according to claim 6, characterized in that: Both the first and second semi-annular platforms have rubber sheets installed at the notches.

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