Bolt clamping length adjustable tooling

Abstract

The utility model relates to a bolt clamping length adjustable tool for the axial force sensor, the clamping length adjustable tool includes the adjusting tool main outer cover for fixed, the adjusting tool rotation sleeve for rotating distance adjustment and the lengthening nut for connecting the bolt of test, wherein, the adjusting tool main outer cover includes the main outer cover internal thread and four lock through -holes for fixedly distributed in the outer edge, the adjusting tool rotation sleeve includes the rotation sleeve external thread for screwing the main outer cover internal thread, the rotation sleeve flange for rotating and the rotation sleeve containing through -hole for the lengthening nut of the sleeve joint in the adjusting tool rotation sleeve, the lengthening nut includes the nut internal thread for connecting the bolt of test and nut flange, the end of nut internal thread and the end of rotation sleeve external thread are in the same plane. The bolt clamping length can be adjusted only by screwing in or screwing out the adjusting tool rotation sleeve, and the operation is simple and flexible.

Description

Technical Field

[0001] This utility model relates to an automotive bolt testing device, specifically to an adjustable bolt clamping length fixture used in the early bolt calibration stage of ultrasonic tightening axial force testing of automotive bolts. Background Technology

[0002] With the development of science and technology, and the rapid advancement and innovation of technology, automotive products are changing rapidly, which also puts forward higher technical requirements for stamped parts and fasteners. In the production, processing and testing of automotive bolts, the rapid iteration of car models, the complex structure and numerous design changes of bolts, and the variety of lengths are all factors to consider. The purpose of ultrasonic axial force testing is to test the clamping force of bolts under working conditions. The clamping length of the bolt in the axial force sensor needs to be consistent with the clamping length under working conditions. Therefore, the clamping length of the bolt in the axial force sensor needs to be adjusted according to the working conditions.

[0003] In the existing technology, the bolt clamping length is adjusted by adding or removing shims. The bolt clamping process includes multiple shims, making it difficult to adjust the clamping length, matching difficult, and resulting in a large deviation from the clamping length under working conditions, which is cumbersome to operate.

[0004] Therefore, it is necessary to develop a tooling with adjustable bolt clamping length for the bolt in the axial force sensor. Utility Model Content

[0005] The purpose of this invention is to provide a simple, reliable, and widely applicable bolt axial force sensor calibration clamping length adjustable tooling to solve existing technical problems.

[0006] To achieve the above objectives, this utility model provides a bolt clamping length adjustable fixture for use in an axial force sensor. The adjustable clamping length fixture includes a main outer sleeve for fixing, a rotating sleeve for adjusting the distance on the main outer sleeve, and an extended nut for connecting a test bolt on the rotating sleeve. The main outer sleeve includes an internal thread and four locking through holes evenly distributed on its outer edge for fixing. The rotating sleeve includes an external thread for screwing the internal thread of the main outer sleeve, a rotating flange for rotation, and a rotating accommodating through hole for fitting the extended nut. The extended nut includes an internal thread for connecting the test bolt and a nut flange. The end of the internal thread of the nut and the end of the external thread of the rotating sleeve are on the same plane.

[0007] According to the preferred embodiment of the present utility model, the adjustable bolt clamping length tooling includes a threaded seat located between the external thread of the rotating sleeve and the flange of the rotating sleeve, and the main outer sleeve of the adjusting tooling has a main outer sleeve receiving groove corresponding to the position of the threaded seat.

[0008] According to the preferred embodiment of the present invention, the bolt clamping length adjustable fixture has a stepped outer surface on the main outer sleeve of the adjustable fixture.

[0009] According to the preferred embodiment of the present invention, the adjustable bolt clamping length fixture further includes a bracket assembly for fixing the adjustable clamping length fixture and a bolt support frame for supporting the test bolts mounted on the bracket assembly.

[0010] According to the preferred embodiment of the present invention, the bolt clamping length adjustable fixture further includes a slide rail assembly for movement disposed below the support assembly and a base plate disposed below the slide rail assembly.

[0011] According to the preferred embodiment of the present invention, the bolt clamping length adjustable fixture further includes a head friction torque sensor, a thread friction torque sensor, and a clamping force sensor for transmitting information.

[0012] The design concept of this application is to design a tooling that allows the bolt clamping length adjustment to be achieved simply by screwing in or out the rotating sleeve of the adjustment tooling, so that the bolt clamping length deviation is controlled within 0.25mm, which meets the requirements of the working conditions. It is also simple to operate, highly flexible, and there are no multiple layers of gaskets connecting the bolt and the axial force sensor, resulting in stable clamping.

[0013] Compared with the prior art, the present invention has the following advantages: First, this application only requires screwing in or out the adjusting tooling rotating sleeve to adjust the bolt clamping length, which is simple to operate and highly flexible. Second, the bolt clamping length deviation in this application is controlled within 0.25mm, which meets the requirements of the working conditions; Third, this application does not have multi-layer gasket connections, and the tooling clamping is stable.

[0014] Of course, implementing any specific embodiment of the content of this application does not necessarily have all of the above technical effects at the same time. Attached Figure Description

[0015] Figure 1 This is a schematic diagram showing the shortest distance of the adjustable clamping length tooling in this application; Figure 2 This is a schematic diagram showing the maximum distance of the adjustable clamping length tooling in this application; Figure 3This is a schematic diagram illustrating the adjustment of the main outer garment of the workwear in this application; Figure 4 This is a sectional view of the main outer casing of the adjustable tooling in this application; Figure 5 This is a schematic diagram of the adjusting tooling rotating sleeve of this application; Figure 6 This is a schematic diagram of another angle adjustment tooling rotating sleeve of this application; Figure 7 This is a schematic diagram of the extended nut in this application.

[0016] In the diagram, 10-adjusting fixture main sleeve, 11-main sleeve internal thread, 12-locking through hole, 13-main sleeve receiving groove, 20-adjusting fixture rotating sleeve, 21-rotating sleeve external thread, 22-thread seat, 23-rotating sleeve flange, 24-rotating sleeve receiving through hole, 30-extended nut, 31-nut internal thread, 32-nut flange, 40-support assembly, 50-bolt support frame, 60-slide rail assembly, 70-base plate. Detailed Implementation

[0017] The present invention will be described in detail below with reference to the accompanying drawings.

[0018] Please refer to Figure 1 and Figure 2 The adjustable clamping length fixture of this application is used to adjust the clamping length of bolts in an axial force sensor to meet the requirements of working conditions. In the ultrasonic axial force test of bolts, the clamping force of bolts under working conditions can be accurately measured. The clamping force of bolts under working conditions can be obtained by comparison with the bolt calibration curve. When using the adjustable clamping length fixture of this application, it is only necessary to screw in or out the adjusting fixture rotating sleeve to meet the bolt working condition requirements. It is simple to operate, highly flexible, and provides stable bolt clamping.

[0019] Regarding bolt calibration testing, during bolt calibration, the test bolt needs to be tightened in the axial force sensor. During the bolt tightening process, the axial force sensor measurement value is fitted with the flight time of the ultrasonic wave in the bolt to obtain the axial force versus flight time curve, i.e., the bolt calibration curve. The clamping length of the bolt in the axial force sensor needs to be consistent with the clamping length under working conditions. Therefore, the clamping length of the bolt in the axial force sensor needs to be adjusted according to the working conditions, which is where the adjustable clamping length fixture of this application comes in.

[0020] like Figure 1 and Figure 2 As shown, the adjustable clamping length fixture includes a main outer sleeve 10 for fixing, a rotating sleeve 20 for adjusting the distance by rotation on the main outer sleeve 10, and an extended nut 30 for connecting a test bolt on the rotating sleeve 20. Figure 1 The shortest distance Lx is marked in the middle. Figure 2 The maximum distance Ly is marked in the middle, and the clamping length deviation from Lx to Ly is controlled within 0.25mm, which meets the requirements of the working conditions; the clamping length can be adjusted up to 40mm without changing the tooling.

[0021] Please refer to Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The main outer sleeve 10 of the adjusting fixture includes an inner thread 11 and four locking through holes 12 evenly distributed on its outer edge for fixing the axial force sensor. The rotating sleeve 20 of the adjusting fixture includes an outer thread 21 for screwing the inner thread 11 of the main outer sleeve, a rotating flange 23 for rotation, and a rotating accommodating through hole 24 for fitting the extended nut 30 within the rotating sleeve 20. The extended nut 30 includes an inner thread 31 for connecting a test bolt and a nut flange 32. The end of the inner thread 31 and the end of the outer thread 21 are on the same plane. In this embodiment, the axial force sensor has locking holes corresponding to the positions of the four locking through holes 12. The main outer sleeve 10 of the adjusting fixture is fixedly connected to the axial force sensor by a screw locking mechanism. After assembly, the main outer sleeve 10 of the adjusting fixture will not move. To increase the linkage between the extended nut 30 and the rotating sleeve 20 of the adjusting fixture, the nut flange 32 includes two parallel cutting lines, corresponding to... Figure 6 The rotating sleeve receiving through hole 24 also includes two parallel surfaces. During assembly, the extended nut 30 is inserted into the rotating sleeve receiving through hole 24 that connects to the adjusting tool rotating sleeve 20. Due to the abutment of the planes, the extended nut 30 can rotate forward or backward when the adjusting tool rotating sleeve 20 rotates forward or backward, thereby achieving the purpose of adjusting the clamping length.

[0022] Furthermore, the connection between the main outer sleeve 10 and the rotating sleeve 20 of the adjusting fixture is as follows: the external thread 21 of the rotating sleeve is screwed onto the internal thread 11 of the main outer sleeve. When adjusting the bolt clamping length, the external thread 21 of the rotating sleeve can be rotated clockwise to engage a shorter bolt, and vice versa, the external thread 21 of the rotating sleeve can be rotated counterclockwise to engage a longer bolt. Since the main outer sleeve 10 of the adjusting fixture is fixed, each rotation can cause the rotating sleeve 20 of the adjusting fixture to move; for example... Figure 5 and Figure 6 As shown, the rotating sleeve flange 23 used for rotation is a circular flange, and evenly distributed grooves are opened on the outer edge of the rotating sleeve flange 23. This design makes it convenient for manual hand rotation of the adjusting tool rotating sleeve 20, and also convenient for rotating the adjusting tool rotating sleeve 20 with tools.

[0023] Figure 5 In this context, the adjusting tooling rotating sleeve 20 also includes a threaded seat 22 located between the external thread 21 of the rotating sleeve and the flange 23 of the rotating sleeve. Figure 4 In the process, the main outer sleeve 10 of the adjusting fixture has a main outer sleeve receiving groove 13 at the position corresponding to the threaded seat 22. The inner diameter of the main outer sleeve receiving groove 13 is larger than the outer diameter of the threaded seat 22. Figure 1 In the case of the shortest distance Lx, the threaded seat 22 enters the main outer sleeve receiving groove 13. This design is most in line with the design principle and ensures the strength of the adjusting tooling rotating sleeve 20.

[0024] Please refer to Figure 3 and Figure 4 The outer surface of the main outer sleeve 10 of the adjustment fixture is stepped, and the outer diameter of the side facing the rotating sleeve flange 23 of the rotating sleeve 20 of the adjustment fixture is larger. The purpose of this design is to also open a stepped groove on the opposite part. During assembly, the main outer sleeve 10 of the adjustment fixture is inserted into the stepped groove of the opposite part and then locked with fasteners, which can increase the connection strength and prevent errors caused by loosening during repeated use.

[0025] Please refer to Figure 1 To ensure a secure connection and ease of use, the axial force sensor further includes a bracket assembly 40 for fixing the adjustable clamping length fixture and a bolt support frame 50 for supporting the test bolt mounted on the bracket assembly 40. The bracket assembly 40 has a stepped groove as described above and locking holes corresponding to the four locking through holes 12. During assembly, fasteners are used to lock the main outer sleeve 10 of the adjusting fixture and the bracket assembly 40 to prevent loosening. In addition, the bolt support frame 50 is U-shaped and is fastened to the bracket assembly 40 by fasteners. After assembly, the bolt support frame 50 supports the center of the through hole of the test bolt and the center of the internal thread 31 of the nut to be concentric. With the two concentric designs, the test bolt can be securely connected to the internal thread 31 of the nut and smoothly screwed in. Furthermore, for convenient placement and use, the axial force sensor also includes a slide rail assembly 60 for movement below the bracket assembly 40 and a base plate 70 below the slide rail assembly 60.

[0026] Preferably, the axial force sensor further includes a head friction torque sensor (not shown), a thread friction torque sensor (not shown), and a clamping force sensor (not shown) for transmitting information. This application is for ultrasonic bolt tightening axial force testing. Therefore, the information sent by the sensor is fitted with the flight time of the ultrasonic wave in the bolt to obtain the axial force versus flight time curve, i.e., the bolt calibration curve.

[0027] It should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0028] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0029] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0030] Compared with the prior art, the present invention has the following advantages: First, this application only requires screwing in or out the adjusting tooling rotating sleeve-thread to adjust the bolt clamping length, which is simple to operate and highly flexible; Second, the bolt clamping length deviation in this application is controlled within 0.25mm, which meets the requirements of the working conditions; Third, this application does not have multi-layer gasket connections, and the tooling clamping is stable.

[0031] The above-disclosed embodiments are only a few specific examples of this utility model, but this utility model is not limited thereto. Any variations that can be conceived by those skilled in the art should fall within the protection scope of this utility model.

Claims

1. A bolt clamping length adjustable tooling for use in a shaft load cell, characterized by, The adjustable clamping length fixture includes a main outer sleeve for fixing, a rotating sleeve for adjusting the distance by rotation, and an extended nut for connecting a test bolt, all mounted on the rotating sleeve. The main outer sleeve of the adjustment fixture includes an internal thread and four locking through holes evenly distributed on the outer edge for fixing; The adjusting tooling rotating sleeve includes a rotating sleeve external thread for screwing the inner thread of the main outer sleeve, a rotating sleeve flange for rotating, and a rotating sleeve receiving through hole opened in the adjusting tooling rotating sleeve for fitting the extended nut. The extended nut includes an internal thread for connecting the test bolt and a nut flange; The end of the internal thread of the nut and the end of the external thread of the rotating sleeve are on the same plane.

2. The bolt clamping length adjustable tooling of claim 1, wherein, The adjusting tooling rotary sleeve also includes a threaded seat located between the external thread of the rotary sleeve and the flange of the rotary sleeve, and the main outer sleeve of the adjusting tooling has a main outer sleeve receiving groove corresponding to the position of the threaded seat.

3. The bolt clamping length adjustable tooling of claim 2, wherein, The outer surface of the main outer jacket of the adjustment fixture is stepped.

4. The bolt clamping length adjustable tooling of claim 3, wherein, The axial force sensor also includes a bracket assembly for fixing the adjustable clamping length fixture and a bolt support frame for supporting the test bolts mounted on the bracket assembly.

5. The bolt clamping length adjustable tooling of claim 4, wherein, The axial force sensor also includes a slide rail assembly for movement disposed below the support assembly and a base plate disposed below the slide rail assembly.

6. The bolt clamping length adjustable tooling of claim 5, wherein, The axial force sensor also includes a head friction torque sensor, a thread friction torque sensor, and a clamping force sensor for transmitting information.

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