Measuring device suitable for inner hole of thin-wall part

Abstract

The utility model discloses a measuring device suitable for an inner hole of a thin-wall part, and relates to the field of part measurement. The device comprises a pneumatic measuring instrument, the pneumatic measuring instrument comprises a measuring instrument main body, a gas transmission adapter, a measuring head and a buckle type fastening grab handle, the front end of the measuring instrument main body is fixedly connected with a connecting gas pipe, the measuring instrument main body is used for feeding back error data of a part, and the gas transmission adapter is fixedly connected to the other end of the connecting gas pipe. The gas transmission adapter is movably clamped on the measuring head, the measuring head is used for measuring errors of parts, the buckle type fastening grab handle is movably clamped on the measuring head, and the gas transmission adapter is fixed at the top end of the measuring head through the buckle type fastening grab handle. According to the device, when the measuring instrument main body and the measuring heads with different sizes are fixed, only the gas transmission adapter needs to be placed on the measuring head, then the buckle type fastening grab handle is clamped on the measuring head, and meanwhile, the gas transmission adapter is fixed, so that the mounting and dismounting are convenient, the fixation is stable, and too much time does not need to be wasted in equipment mounting and dismounting.

Description

Technical Field

[0001] This utility model relates to the field of parts measurement technology, specifically a measuring device suitable for the inner hole of thin-walled parts. Background Technology

[0002] A pneumatic measuring instrument is a high-precision, non-contact measuring device based on the principles of fluid statics and dynamics. Its core principle is to convert changes in the dimensions of the workpiece being measured, such as the inner diameter of a thin-walled part, into changes in compressed air flow or pressure, which are then visually displayed through a float-type glass tube or an electronic column. The equipment mainly consists of the measuring instrument body and a customized pneumatic probe. Key components include a precision pressure reducing valve, a nozzle orifice and exhaust groove probe, a pressure transmitter, and a microcontroller control system. By using a comparative measurement method and a calibration ring gauge to set tolerance ranges, it achieves micron-level precision detection. Its non-contact nature effectively avoids deformation or surface scratches on thin-walled parts caused by measuring forces, making it particularly suitable for high-precision, high-volume production scenarios such as automotive parts and compressor cylinder blocks.

[0003] Existing pneumatic measuring instruments typically involve passing an air tube through the handle and contacting the measuring head from the bottom, followed by connecting the measuring head and the air tube, and finally fixing the handle screw to the measuring head for use. This process is cumbersome, involves too many preparation steps, and is troublesome to maintain and disassemble. To address these issues, this invention provides a measuring device suitable for measuring the inner diameter of thin-walled parts. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a measuring device suitable for the inner hole of thin-walled parts. It solves the problems of existing pneumatic measuring instruments, which typically require the air tube to pass through the handle and contact the measuring head from the bottom, followed by connecting the measuring head and the air tube, and finally fixing the handle screw to the measuring head for use. This makes the use cumbersome, involves too many preparation steps, and is troublesome to maintain and disassemble.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a measuring device suitable for measuring the inner diameter of thin-walled parts, comprising a pneumatic measuring instrument, the pneumatic measuring instrument comprising a measuring instrument body, an air supply adapter, a measuring head, and a snap-fit ​​fastening handle, wherein a connecting air tube is fixedly connected to the front end of the measuring instrument body, the measuring instrument body is used to feed back error data of the part, the air supply adapter is fixedly connected to the other end of the connecting air tube, the air supply adapter is movably snapped onto the measuring head, the measuring head is used to measure the error of the part, the snap-fit ​​fastening handle is movably snapped onto the measuring head, and the air supply adapter is fixed to the top of the measuring head via the snap-fit ​​fastening handle.

[0006] Preferably, the snap-fit ​​fastening handle is provided with a snap-fit ​​cavity, a fixing groove, and a locking block. The snap-fit ​​cavity is located at the bottom end of the snap-fit ​​fastening handle, the air supply adapter is inserted into the snap-fit ​​cavity, the fixing groove is located on one side of the snap-fit ​​cavity, one end of the air supply adapter is movably snapped into the fixing groove, and the locking block is slidably connected to the snap-fit ​​fastening handle and movably snapped into the measuring head.

[0007] Preferably, the gas adapter has a gas pipe fixing hole inside, which is connected to the connecting gas pipe. The gas adapter also has a connecting groove inside, and a limiting short column is fixedly connected to the top of the gas adapter.

[0008] Preferably, the measuring head includes an air outlet measuring hole and a snap-fit ​​groove. The air outlet measuring hole is located at the front end of the measuring head and is used for air outlet measurement. The snap-fit ​​groove is located at the top end of the measuring head, and the snap-fit ​​block is movably snapped into the snap-fit ​​groove.

[0009] Preferably, the measuring head further includes an air supply clamp and a limiting hole. The air supply clamp is fixedly connected to the top of the measuring head, the air supply adapter is movably clamped onto the air supply clamp, the limiting hole is opened on the air supply clamp, and the limiting short post is movably clamped into the limiting hole.

[0010] Preferably, the snap-fit ​​fastening handle further includes a side sliding cavity, a pressing rod, a spring, and a limiting block. The side sliding cavity is located at both ends of the snap-fit ​​fastening handle. The limiting block is slidably connected within the side sliding cavity. The pressing rod is fixedly connected to the outer end of the limiting block and is used to press the limiting block to slide. One end of the spring is fixedly connected to the inner wall of the side sliding cavity, and the other end of the spring is fixedly connected to the limiting block. The spring is used to drive the limiting block to reset. The limiting block is fixedly connected to the bottom end of the limiting block and is movably engaged in the engaging groove.

[0011] Its beneficial effects are as follows:

[0012] 1. This measuring device, applicable to the inner hole of thin-walled parts, features a snap-on fastening handle. When fixing the measuring instrument body and measuring heads of different sizes, it is only necessary to first place the air supply adapter on the measuring head, and then snap the fastening handle onto the measuring head to fix the air supply adapter. This makes installation and disassembly convenient and secure, without wasting too much time on equipment assembly and disassembly. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall front structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the overall side structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the overall exploded structure of this utility model;

[0017] Figure 4 This is a schematic diagram showing the detailed structure of the snap-on fastening handle of this utility model;

[0018] Figure 5 This is a schematic diagram of the overall structure of the measuring head of this utility model;

[0019] Figure 6 This is a schematic cross-sectional view of the gas transmission adapter of this utility model.

[0020] In the diagram: 1. Pneumatic measuring instrument; 11. Measuring instrument body; 111. Connecting air tube; 12. Snap-on fastening handle; 121. Snap-fit ​​cavity; 122. Fixing groove; 123. Side sliding cavity; 124. Locking block; 125. Press rod; 126. Spring; 127. Limiting block; 13. Measuring head; 131. Air outlet measuring hole; 132. Snap-fit ​​groove; 133. Air supply locking connector; 134. Limiting hole; 14. Air supply adapter; 141. Air tube fixing hole; 142. Connecting circular groove; 143. Limiting short post. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0023] This utility model discloses a measuring device applicable to the internal holes of thin-walled parts, according to the attached... Figure 1-2 As shown, the instrument includes a pneumatic measuring instrument 1, which comprises a measuring instrument body 11, an air supply adapter 14, a measuring head 13, and a snap-on fastening handle 12. The measuring instrument body 11 is fixedly connected to a connecting air tube 111 at its front end. The measuring instrument body 11 is used to provide feedback on the error data of the parts. The air supply adapter 14 is fixedly connected to the other end of the connecting air tube 111 and is movably snapped onto the measuring head 13. The measuring head 13 is used to measure the error of the parts. The snap-on fastening handle 12 is movably snapped onto the measuring head 13. The air supply adapter 14 is fixed to the top of the measuring head 13 by the snap-on fastening handle 12. In use, the air supply adapter 14 is first installed on the measuring head 13, and then the snap-on fastening handle 12 is movably snapped onto the measuring head 13 for fixation.

[0024] According to the appendix Figure 1-4 As shown, the snap-fit ​​grip 12 further includes a snap-fit ​​cavity 121, a fixing groove 122, and a locking block 124. The snap-fit ​​cavity 121 is located at the bottom of the snap-fit ​​grip 12, and the gas adapter 14 is inserted into the snap-fit ​​cavity 121. The fixing groove 122 is located on one side of the snap-fit ​​cavity 121, and one end of the gas adapter 14 is movably snapped into the fixing groove 122. The locking block 124 is slidably connected to the snap-fit ​​grip 12 and is movably snapped into the measuring head 13.

[0025] According to the appendix Figure 6 As shown, the gas adapter 14 further includes a gas pipe fixing hole 141, which is connected to the connecting gas pipe 111. The gas adapter 14 also includes a connecting groove 142, and a limiting short post 143 is fixedly connected to the top of the gas adapter 14.

[0026] According to the appendix Figure 5 As shown, the measuring head 13 includes an air outlet measuring hole 131 and a snap-fit ​​groove 132. The air outlet measuring hole 131 is located at the front end of the measuring head 13 and is used for air outlet measurement. The snap-fit ​​groove 132 is located at the top end of the measuring head 13, and the snap-fit ​​block 124 is movably snapped into the snap-fit ​​groove 132. The measuring head 13 also includes an air supply snap-fit ​​connector 133 and a limiting hole 134. The air supply snap-fit ​​connector 133 is fixedly connected to the top end of the measuring head 13, and the air supply adapter 14 is movably snapped into the air supply snap-fit ​​connector 133. The limiting hole 134 is located on the air supply snap-fit ​​connector 133, and the limiting short post 143 is movably snapped into the limiting hole 134. In use, the air supply adapter 14 is placed on the measuring head 13, and the position is determined and snapped into place by the two sets of limiting holes 134 and limiting short posts 143.

[0027] According to the appendix Figure 1-6As shown, it is particularly important to emphasize that the snap-on fastening handle 12 is also provided with a side sliding cavity 123, a pressing rod 125, a spring 126, and a limiting block 127. The side sliding cavity 123 is opened at both ends of the snap-on fastening handle 12. The locking block 124 is slidably connected in the side sliding cavity 123. The pressing rod 125 is fixedly connected to the outer end of the locking block 124 and is used to press the locking block 124 to slide. One end of the spring 126 is fixedly connected to the inner wall of the side sliding cavity 123 and the other end is fixedly connected to the locking block 124. The spring 126 is used to drive the locking block 124 to reset. The limiting block 127 is fixedly connected to the bottom end of the locking block 124 and is movably engaged in the engagement groove 132. The snap-on fastening handle 12 is fixedly connected to the measuring head 13 through the engagement groove 132 and the limiting block 127.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A measuring device suitable for measuring the inner hole of thin-walled parts, including a pneumatic measuring instrument (1), characterized in that, The pneumatic measuring instrument (1) includes: The measuring instrument body (11) has a connecting air tube (111) fixedly connected to its front end. The measuring instrument body (11) is used to feed back the error data of the parts. Gas adapter (14), which is fixedly connected to the other end of the gas pipe (111); Measuring head (13), the gas adapter (14) is movably snapped onto the measuring head (13), the measuring head (13) is used to measure the error of the part; A snap-on fastening handle (12) is movably snapped onto the measuring head (13), and the gas adapter (14) is fixed to the top of the measuring head (13) via the snap-on fastening handle (12).

2. The measuring device for the inner hole of thin-walled parts according to claim 1, characterized in that, The snap-on fastening handle (12) is provided with: A snap-fit ​​cavity (121) is provided at the bottom end of the snap-fit ​​fastening handle (12), and the gas delivery adapter (14) is inserted into the snap-fit ​​cavity (121); A fixing groove (122) is provided on one side of the snap-fit ​​cavity (121), and one end of the gas transmission adapter (14) is movably snapped into the fixing groove (122); The locking block (124) is slidably connected in the snap-fit ​​fastening handle (12) and is movably locked in the measuring head (13).

3. The measuring device for the inner hole of thin-walled parts according to claim 1, characterized in that, The gas adapter (14) has a gas pipe fixing hole (141) inside, which is connected to the connecting gas pipe (111). The gas adapter (14) also has a connecting groove (142) inside, and a limit post (143) is fixedly connected to the top of the gas adapter (14).

4. The measuring device for the inner hole of a thin-walled part according to claim 2, characterized in that, The measuring head (13) includes: An exhaust measuring hole (131) is provided at the front end of the measuring head (13) and is used for measuring exhaust gas. A snap-fit ​​groove (132) is provided at the top of the measuring head (13), and the snap-fit ​​block (124) is movably snapped into the snap-fit ​​groove (132).

5. The measuring device for the inner hole of a thin-walled part according to claim 3, characterized in that, The measuring head (13) also includes: Gas delivery connector (133), the gas delivery connector (133) is fixedly connected to the top of the measuring head (13), and the gas delivery adapter (14) is movably snapped onto the gas delivery connector (133); A limiting hole (134) is provided on the gas delivery connector (133), and the limiting short post (143) is movably engaged in the limiting hole (134).

6. The measuring device for the inner hole of a thin-walled part according to claim 4, characterized in that, The snap-on fastening handle (12) is also provided with: Side sliding cavity (123), the side sliding cavity (123) is opened at both ends of the snap-on fastening handle (12), and the locking block (124) is slidably connected in the side sliding cavity (123); A push rod (125) is fixedly connected to the outer end of the locking block (124), and the push rod (125) is used to push the locking block (124) to slide. A spring (126) is fixedly connected at one end to the inner wall of the side sliding cavity (123) and at the other end to the locking block (124). The spring (126) is used to drive the locking block (124) to reset. A limiting block (127) is fixedly connected to the bottom end of a block (124), and the limiting block (127) is movably engaged in a slot (132).

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