Device for measuring inner diameter of powder metallurgy part of automobile

Abstract

The utility model relates to the field of powder metallurgy part measuring devices, and discloses an inner diameter measuring device for an automobile powder metallurgy part. The pneumatic measuring instrument comprises a pneumatic measuring instrument body, a base located on one side of the pneumatic measuring instrument body, an inner diameter measuring column head arranged on the top of the base and a rotating sleeve, the rotating sleeve is rotationally connected with the base, the inner diameter measuring column head is located in the rotating sleeve and concentrically arranged, and the rotating sleeve is provided with a plurality of clamping columns. After a part is placed in the rotating sleeve, the multiple clamping columns clamp the part and enable the part, the inner diameter measuring column head and the rotating sleeve to be kept concentric. According to the utility model, the internal diameter value of a part measured by the pneumatic gauge body is more accurate; the clamping column is more stable in the process of driving the part to rotate after clamping the part; the operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of powder metallurgy parts measuring devices, in particular to an inner diameter measuring device for automobile powder metallurgy parts. Background Art

[0002] Some automotive parts are in great demand, so conventional turning is a waste. As powder metallurgy technology matures, most of them are produced using powder metallurgy technology. After some cylindrical parts are produced using powder metallurgy technology, their inner diameters need to be measured to check whether they are qualified. When measuring the inner diameter of a part, a pneumatic measuring instrument is usually used. In existing measurements, the staff will hold the part in one hand and the inner diameter probe in the other hand. The inner diameter probe is then inserted into the part so that the air outlet on the inner diameter probe is located in the inner hole of the part. The part is then rotated several times to measure the inner diameter of the part.

[0003] During the above operation, in order to ensure that the gas can be discharged from the outlet, the inner diameter probe will be inserted into the inner hole of the part and match the clearance of the part. However, when the staff rotates the part, it is easy to deviate and produce errors, causing the part and the inner diameter probe to be non-concentric, thereby affecting the accuracy of the measurement data. Utility Model Content

[0004] In order to solve at least one aspect of the above problems, the utility model provides an inner diameter measuring device for automobile powder metallurgy parts, comprising a pneumatic measuring instrument body, a base, an inner diameter measuring column head and a rotating sleeve, wherein the base is arranged on one side of the pneumatic measuring instrument body, a base column is arranged on the top of the base, the top of the base column is a plane, the inner diameter measuring column head is arranged on the top of the base column and is concentric with the base column, the outer diameter of the inner diameter measuring column head is smaller than the outer diameter of the base column, a part is sleeved on the inner diameter measuring column head, the inner diameter of the part is smaller than the outer diameter of the base column but larger than the outer diameter of the inner diameter measuring column head, a side of the part close to the top of the base column is fitted with the top of the base column, an air pipe is arranged on one side of the base, the other end of the air pipe is connected to the pneumatic measuring instrument body, the airflow in the air pipe can be discharged through the inner diameter measuring column head, the rotating sleeve is sleeved on the base column and can rotate relative to the base column, and the rotating sleeve is arranged concentrically with the base column;

[0005] A circular groove is provided on the top of the rotating sleeve, and the circular groove is concentric with the base column. The inner diameter of the circular groove is larger than the inner diameter of the base column. A plurality of clamping columns are circumferentially spaced on the groove wall of the circular groove, and the clamping columns move radially along the rotating sleeve. The plurality of clamping columns are suitable for clamping parts. A ratchet ring is rotatably provided on the top of the rotating sleeve, and the plurality of clamping columns are movably connected with the ratchet ring. When the ratchet ring rotates relative to the rotating sleeve, it will drive the plurality of clamping columns to move synchronously. A ratchet is rotatably provided on the rotating sleeve. When the plurality of clamping columns clamp the parts, the ratchet is inserted on the ratchet ring to limit the rotation and reset of the ratchet ring. A driving motor is provided on the top of the base, and the driving motor is suitable for driving the rotating sleeve to drive the parts to rotate.

[0006] Optionally, the groove wall of the circular groove is provided with a radial groove, the radial groove penetrates the rotating sleeve along the radial direction of the rotating sleeve, the clamping column is inserted into the radial groove and slides in the radial groove, and a plurality of radial grooves are provided along the circumference of the rotating sleeve, and the number of the radial grooves is consistent with the number of the clamping columns and corresponds one to one.

[0007] Optionally, the radial groove passes through the top of the rotating sleeve, a driving column is fixedly installed on the top of the clamping column, and the ratchet ring is provided with a driving bevel groove, which is inclined relative to the radial direction of the ratchet ring, one end of the driving bevel groove is close to the center of the ratchet ring, and the other end is away from the center of the ratchet ring, and the driving column is inserted in the driving bevel groove.

[0008] Optionally, a cantilever plate is fixedly provided on the outer wall of the rotating sleeve, and the cantilever plate is located below the ratchet ring. The ratchet is rotatably installed on the top of the cantilever plate. When the ratchet ring rotates in the opposite direction, the clamping column moves toward the direction close to the inner diameter measuring column head. A reset spring is provided on one side of the ratchet. The reset spring is suitable for driving the ratchet to reset and is inserted into the ratchet ring to limit the forward rotation of the ratchet ring.

[0009] Optionally, a rubber pad is glued to one end of the clamping column close to the inner diameter measuring column head, and the rubber pad is in contact with the outer wall of the part.

[0010] Optionally, a circular ring is fixedly provided on the top of the rotating sleeve, the circular ring is concentric with the rotating sleeve, and the ratchet ring is sleeved on the circular ring and can rotate relative to the circular ring.

[0011] Optionally, the rotating sleeve is sleeved with and fixedly connected to a gear ring, the driving motor is provided with a driving gear, the driving gear and the gear ring are meshed with each other, and the driving motor drives the driving gear to rotate and drives the rotating sleeve to rotate.

[0012] Compared with the prior art, the beneficial technical effects of the utility model are:

[0013] 1. The top surface of the base column is a plane. After the part is placed on the top of the base column, it is not easy to tilt. At this time, the inner diameter measuring column head is inserted into the hole of the part, and then multiple clamping columns are driven to move to clamp and position the part. Since the rotating sleeve is concentric with the base column and multiple clamping columns move synchronously, the part can be clamped so that the part, the inner diameter measuring column head and the base column can remain concentric. After the rotating sleeve drives the part to rotate, the pneumatic measuring instrument body can measure the inner diameter value of the part more accurately.

[0014] 2. Rotating the ratchet ring can make multiple clamping columns move synchronously and ensure the concentricity of the parts with the base column after clamping. The driving motor can drive the rotating sleeve to drive the parts to rotate, which is easy to operate;

[0015] 3. After the clamping column clamps and positions the part, the ratchet limits the reverse rotation of the ratchet wheel, which improves the stability of the part after clamping. The part is not easy to loosen during the rotation of the sleeve, which further improves the accuracy of the measured value;

[0016] 4. The setting of the rubber pad can prevent the surface of the part from being scratched, and on the other hand, it increases the friction between the clamping column and the part, making the clamping column more stable when driving the part to rotate after clamping it. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the overall structural diagram of the inner diameter measuring device in the embodiment of the utility model;

[0018] Figure 2 An exploded view of the base, the driving motor and the rotating sleeve in the embodiment of the utility model;

[0019] Figure 3 An exploded view of the rotating sleeve, the ratchet ring and the clamping column in the embodiment of the utility model;

[0020] Figure 4 It is a partial enlarged view of an embodiment of the utility model.

[0021] Explanation of the reference numerals: 1. pneumatic measuring instrument body; 2. base; 21. inner diameter measuring column head; 22. base column; 23. air pipe; 24. driving motor; 25. driving gear; 3. rotating sleeve; 31. clamping column; 311. rubber pad; 312. driving column; 32. circular groove; 33. radial groove; 34. ratchet ring; 341. driving inclined groove; 35. cantilever plate; 351. abutment plate; 352. reset spring; 353. limit strip; 36. ratchet; 37. gear ring. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] In the description of the present invention, it should be understood that the terms "upper" and "lower" and the like indicate positions or location relationships that are based on the positions or location relationships when the product is in normal use.

[0024] The following is combined with Figure 1-4 This application is described in further detail.

[0025] The utility model provides a device for measuring the inner diameter of automobile powder metallurgy parts. Figure 1 and Figure 2 The inner diameter measuring device for automobile powder metallurgy parts comprises a pneumatic measuring instrument body 1, a base 2 located on one side of the pneumatic measuring instrument body 1, an inner diameter measuring column head 21 arranged on the top of the base 2, and a rotating sleeve 3. The rotating sleeve 3 is rotatably connected to the base 2, the inner diameter measuring column head 21 is located inside the rotating sleeve 3 and is concentrically arranged, and the rotating sleeve 3 is provided with a plurality of clamping columns 31. After the part is placed in the rotating sleeve 3, the plurality of clamping columns 31 will clamp the part and keep the part and the inner diameter measuring column head 21 and the rotating sleeve 3 concentrically. The pneumatic measuring instrument body 1 can provide an air source for the inner diameter measuring column head 21, and the measured value will be displayed on the pneumatic measuring instrument body 1.

[0026] A base column 22 is disposed on the top of the base 2. The base column 22, the inner diameter measuring column head 21 and the rotating sleeve 3 are all rotating bodies. The top of the base column 22 is a plane. The inner diameter measuring column head 21 is disposed on the top of the base column 22 and is concentric with the base column 22. The outer diameter of the inner diameter measuring column head 21 is smaller than the outer diameter of the base column 22.

[0027] Reference Figure 1 and Figure 2 The part is sleeved on the inner diameter measuring column head 21, the inner diameter of the part is smaller than the outer diameter of the base column 22 but larger than the outer diameter of the inner diameter measuring column head 21, and the side of the part close to the top of the base column 22 fits with the top of the base column 22, so that the part is not prone to tilt or offset after being placed on the top of the base column 22.

[0028] An air outlet is provided on the outer wall of the inner diameter measuring column head 21, and the air outlet faces the inner wall of the part. An air pipe 23 is provided on one side of the base 2, and the other end of the air pipe 23 is connected to the pneumatic measuring instrument body 1. The airflow in the air pipe 23 can be discharged through the air outlet on the inner diameter measuring column head 21 and blown to the inner wall of the part. The airflow values ​​at different positions of the inner wall of the part blown by the air outlet will be reflected to the control system inside the pneumatic measuring instrument body 1, and the control system will convert its difference into a signal or a numerical value for display.

[0029] Reference Figure 2 and Figure 3The rotating sleeve 3 is sleeved on the base column 22 and can rotate relative to the base column 22. The rotating sleeve 3 is concentric with the base column 22. A circular groove 32 is provided on the top of the rotating sleeve 3. The circular groove 32 is concentric with the base column 22, and the inner diameter of the circular groove 32 is larger than the inner diameter of the base column 22. A plurality of clamping columns 31 are evenly spaced and arranged in the circumferential direction of the groove wall of the circular groove 32. The clamping columns 31 move along the radial direction of the rotating sleeve 3. The plurality of clamping columns 31 are suitable for clamping parts, so that the rotating sleeve 3 can drive the parts to rotate stably.

[0030] The groove wall of the circular groove 32 is provided with a radial groove 33, which penetrates the rotating sleeve 3 in the radial direction of the rotating sleeve 3, and the radial groove 33 penetrates the top of the rotating sleeve 3. The clamping column 31 is inserted into the radial groove 33 and slides in the radial groove 33. A plurality of radial grooves 33 are evenly spaced along the circumference of the rotating sleeve 3, and the number of radial grooves 33 is consistent with the number of clamping columns 31 and corresponds one to one. A ratchet ring 34 is rotatably provided on the top of the rotating sleeve 3, and the plurality of clamping columns 31 are movably connected to the ratchet ring 34. When the ratchet ring 34 rotates relative to the rotating sleeve 3, the plurality of clamping columns 31 will be driven to move synchronously, so that after the plurality of clamping columns 31 clamp the parts, the concentricity of the parts and the inner diameter measuring column head 21 can be ensured, and the accuracy of the measured value can be ensured. In addition, a rubber pad 311 is glued to one end of the clamping column 31 close to the inner diameter measuring column head 21. The rubber pad 311 contacts the outer wall of the part, which on the one hand prevents scratches on the surface of the part; on the other hand, it increases the friction between the clamping column 31 and the part, making the clamping column 31 more stable when driving the part to rotate after clamping it.

[0031] Reference Figure 2 and Figure 3 A circular ring is fixedly arranged on the top of the rotating sleeve 3. The circular ring is concentric with the rotating sleeve 3. The outer diameter of the circular ring is smaller than the inner diameter of the rotating sleeve 3. The ratchet ring 34 is sleeved on the circular ring and can rotate relative to the circular ring. The circular ring also limits the clamping column 31, that is, the circular ring limits the clamping column 31 along the axial direction of the rotating sleeve 3, so that the clamping column 31 is not easy to be separated from the radial groove 33 along the axial direction of the rotating sleeve 3.

[0032] Reference Figure 2 and Figure 3, a driving column 312 is fixed to the top of each clamping column 31 by glue, making assembly more convenient. The top of the ratchet ring 34 is provided with driving bevel grooves 341, which are the same in number and correspond to the clamping columns 31, and the driving bevel grooves 341 penetrate the ratchet ring 34 in the vertical direction. The driving bevel grooves 341 are arranged to be inclined relative to the radial direction of the ratchet ring 34, that is, one end of the driving bevel grooves 341 is close to the center of the ratchet ring 34, and the other end is away from the center of the ratchet ring 34 in the inclined direction. The driving column 312 is inserted into the driving bevel grooves 341. When the ratchet ring 34 rotates in the reverse direction, the multiple driving columns 312 drive the corresponding clamping columns 31 to move towards the direction close to the inner diameter measuring column head 21 under the action of the corresponding driving bevel grooves 341 to clamp the parts, thereby ensuring the concentricity of the parts with the base column 22 after clamping.

[0033] Reference Figure 3 and Figure 4 A cantilever plate 35 is fixedly provided on the outer wall of the rotating sleeve 3, and the cantilever plate 35 is located below the ratchet ring 34. A rotating shaft is fixedly provided on the top of the cantilever plate 35, and a ratchet 36 is sleeved and rotatably provided on the rotating shaft. The end of the ratchet 36 away from the rotating shaft is inserted into the tooth gap of the outer wall of the ratchet ring 34 to limit the rotation and reset of the ratchet ring 34, thereby improving the stability of the parts after clamping, and the parts are not easy to loosen during the rotation of the rotating sleeve 3.

[0034] Abutment plate 351 is fixedly provided on the top of cantilever plate 35. Abutment plate 351 is located on one side of ratchet 36. A reset spring piece 352 is provided between abutment plate 351 and ratchet 36. The reset spring piece 352 is V-shaped. One side of reset spring piece 352 abuts against ratchet 36; the other side abuts against abutment plate 351. When ratchet ring 34 rotates in reverse, each tooth drives ratchet 36 to rotate and give way. After ratchet 36 rotates and gives way, reset spring piece 352 is squeezed to deform so that ratchet 36 gives way. During the reverse rotation of ratchet ring 34, ratchet 36 is sequentially inserted between any two adjacent teeth of ratchet ring 34 under the action of reset spring piece 352.

[0035] A limit bar 353 is provided on the side of the ratchet 36 away from the reset spring piece 352, and the limit bar 353 is fixed to the top of the cantilever plate 35. When the ratchet ring 34 rotates forward, the ratchet 36 will abut against the limit bar 353 and be limited and unable to rotate, and then the ratchet 36 limits the forward rotation of the ratchet ring 34. If the ratchet ring 34 is to rotate forward, the staff needs to move the ratchet 36 in the direction away from the limit bar 353, so that the ratchet 36 compresses the reset spring piece 352 and does not contact the ratchet.

[0036] Reference Figure 1 and Figure 2A driving motor 24 is provided on the top of the base 2, and a driving gear 25 is provided on the motor shaft of the driving motor 24. The driving motor 24 drives the driving gear 25 to rotate. A gear ring 37 is sleeved and fixedly connected to the rotating sleeve 3, and the driving gear 25 and the gear ring 37 are meshed with each other. The driving motor 24 drives the driving gear 25 to rotate and drives the rotating sleeve 3 to rotate, thereby enabling the part to rotate and the inner diameter of the part to be measured.

[0037] The implementation principle of the inner diameter measuring device of an automobile powder metallurgy part in the embodiment of the present application is as follows: the top surface of the base column 22 is a plane, and the part is not easy to tilt after being placed on the top of the base column 22, and at this time, the inner diameter measuring column head 21 is inserted into the hole of the part. Since the rotating sleeve 3 is concentric with the base column 22, after the ratchet ring 34 is rotated in the reverse direction, the clamping column 31 moves toward the inner diameter measuring column head 21 under the action of the driving column 312 and the driving inclined groove 341 to clamp the part, thereby making the part and the inner diameter measuring column head 21 concentric. When multiple clamping columns 31 clamp the part, the ratchet 36 is inserted on the ratchet ring 34, and the ratchet 36 limits the forward rotation of the ratchet ring 34 under the action of the limit bar 353, so that the part is more stable after being clamped. Finally, the driving motor 24 drives the driving gear 25 to rotate and drives the rotating sleeve 3 to rotate relative to the base column 22, thereby enabling the part to rotate relative to the inner diameter measuring column head 21, so that the inner diameter of the part can be measured.

[0038] Although the disclosure is as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. An inner diameter measuring device for automobile powder metallurgy parts, characterized in that: The invention comprises a pneumatic measuring instrument body (1), a base (2), an inner diameter measuring column head (21) and a rotating sleeve (3), wherein the base (2) is arranged on one side of the pneumatic measuring instrument body (1), a base column (22) is arranged on the top of the base (2), the top of the base column (22) is a plane, the inner diameter measuring column head (21) is arranged on the top of the base column (22) and is concentric with the base column (22), the outer diameter of the inner diameter measuring column head (21) is smaller than the outer diameter of the base column (22), a part is sleeved on the inner diameter measuring column head (21), and the inner diameter of the part is smaller than the outer diameter of the base column (22). The outer diameter of the part is smaller than that of the inner diameter measuring column head (21), the side of the part close to the top of the base column (22) is in contact with the top of the base column (22), an air pipe (23) is provided on one side of the base (2), the other end of the air pipe (23) is connected to the pneumatic measuring instrument body (1), the air flow in the air pipe (23) can be discharged through the inner diameter measuring column head (21), the rotating sleeve (3) is sleeved on the base column (22) and can rotate relative to the base column (22), and the rotating sleeve (3) is concentrically arranged with the base column (22); A circular groove (32) is provided on the top of the rotating sleeve (3), the circular groove (32) is concentric with the base column (22), the inner diameter of the circular groove (32) is larger than the inner diameter of the base column (22), a plurality of clamping columns (31) are provided at intervals in the circumferential direction of the groove wall of the circular groove (32), the clamping columns (31) move along the radial direction of the rotating sleeve (3), the plurality of clamping columns (31) are suitable for clamping parts, a ratchet ring (34) is rotatably provided on the top of the rotating sleeve (3), the plurality of clamping columns (31) are all engaged with the ratchet ring ( The base (2) is movably connected to the rotating sleeve (34). When the ratchet ring (34) rotates relative to the rotating sleeve (3), it will drive the multiple clamping columns (31) to move synchronously. The rotating sleeve (3) is provided with ratchet teeth (36) when it rotates. When the multiple clamping columns (31) clamp the parts, the ratchet teeth (36) are inserted on the ratchet ring (34) to limit the rotation and reset of the ratchet ring (34). A driving motor (24) is provided on the top of the base (2). The driving motor (24) is suitable for driving the rotating sleeve (3) to drive the parts to rotate.

2. The inner diameter measuring device for automobile powder metallurgy parts according to claim 1, characterized in that: The groove wall of the circular groove (32) is provided with a radial groove (33), and the radial groove (33) penetrates the rotating sleeve (3) in the radial direction of the rotating sleeve (3). The clamping column (31) is inserted into the radial groove (33) and slides in the radial groove (33). A plurality of radial grooves (33) are provided along the circumference of the rotating sleeve (3), and the number of the radial grooves (33) is consistent with the number of the clamping columns (31) and corresponds one to one.

3. The inner diameter measuring device for automobile powder metallurgy parts according to claim 2, characterized in that: The radial groove (33) passes through the top of the rotating sleeve (3); a driving column (312) is fixedly installed on the top of the clamping column (31); the ratchet ring (34) is provided with a driving inclined groove (341); the driving inclined groove (341) is inclined relative to the radial direction of the ratchet ring (34); one end of the driving inclined groove (341) is close to the center of the ratchet ring (34), and the other end is far away from the center of the ratchet ring (34); the driving column (312) is inserted into the driving inclined groove (341).

4. The inner diameter measuring device for automobile powder metallurgy parts according to claim 3, characterized in that: A cantilever plate (35) is fixedly provided on the outer wall of the rotating sleeve (3), the cantilever plate (35) is located below the ratchet ring (34), the ratchet (36) is rotatably mounted on the top of the cantilever plate (35), when the ratchet ring (34) rotates in the reverse direction, the clamping column (31) moves in a direction close to the inner diameter measuring column head (21), a reset spring sheet (352) is provided on one side of the ratchet (36), the reset spring sheet (352) is suitable for driving the ratchet (36) to reset and is inserted into the ratchet ring (34) to limit the forward rotation of the ratchet ring (34).

5. The inner diameter measuring device for automobile powder metallurgy parts according to claim 4, characterized in that: A rubber pad (311) is glued to one end of the clamping column (31) close to the inner diameter measuring column head (21), and the rubber pad (311) is in contact with the outer wall of the part.

6. The inner diameter measuring device for automobile powder metallurgy parts according to claim 5, characterized in that: A circular ring is fixedly provided on the top of the rotating sleeve (3), the circular ring is concentric with the rotating sleeve (3), and the ratchet ring (34) is sleeved on the circular ring and can rotate relative to the circular ring.

7. The inner diameter measuring device for automobile powder metallurgy parts according to claim 6, characterized in that: The rotating sleeve (3) is sleeved with and fixedly connected to a gear ring (37); the driving motor (24) is provided with a driving gear (25); the driving gear (25) and the gear ring (37) are meshed with each other; the driving motor (24) drives the driving gear (25) to rotate and drives the rotating sleeve (3) to rotate.

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