Tool for testing axial force of bolt

Abstract

The utility model discloses a bolt axial force test tool, comprising mounting plates which are oppositely arranged up and down, the left and right sides of the mounting plates are respectively and vertically provided with a first vertical plate and a second vertical plate, the right part between the two mounting plates is provided with a sliding support, and the middle part of the sliding support is provided with a front-back through slot. A supporting shaft is vertically arranged in the middle of the open groove, rolling bearings are connected to the upper end and the lower end of the supporting shaft in a sleeving mode, a bolt anti-rotation block is arranged on the right portion of the open groove, and a clamping groove used for clamping a to-be-tested bolt is formed in the side portion of the bolt anti-rotation block; a fixing nut is correspondingly arranged at the end part of the clamped to-be-tested bolt on the outer side of the second vertical plate, and the outer side of the fixing nut is detachably sleeved with a torque wrench. According to the utility model, the problem that the existing test equipment is tedious in operation steps and needs to be operated by professionals so that the efficiency is low can be solved.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically a tooling for testing the axial force of bolts. Background Technology

[0002] Bolts, as fasteners, are widely used in industries such as machinery, construction, and automobiles. The axial force of a bolt is a crucial indicator of its connection performance. Bolt axial force testing is a key functional test item, as the magnitude of the axial force directly affects the strength and reliability of the bolted connection. When the axial force is less than a predetermined value, the bolted connection may loosen, leading to bolt loosening or even detachment. When the axial force exceeds the predetermined value, the bolted connection may undergo plastic deformation or failure. Therefore, accurate bolt axial force measurement is essential for ensuring the safety of bolted connections. Currently, bolt axial force calibration typically employs mechanical testing methods. Two common methods are the static method and the dynamic method. The static method uses a tensile testing machine to apply progressively increasing tensile force to the bolt until a predetermined tensile load is reached. During this process, a load cell measures the applied force, and strain gauges or other strain measurement devices are used to measure the bolt's strain. However, this testing method requires specialized equipment and a long testing time. The dynamic method utilizes vibration sensors and other equipment to vibrate the bolt, determining the bolt axial force by measuring the frequency and amplitude of the vibration signal. Existing methods for testing bolt axial force have limitations, such as complex testing equipment, inconvenient operation, and low testing accuracy. Therefore, it is of great significance to research a simple, efficient, and accurate bolt axial force testing fixture. Utility Model Content

[0003] This utility model provides a bolt axial force testing fixture, which can solve the problem of cumbersome operation procedures and low efficiency caused by the need for professional personnel to operate the existing testing equipment.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a bolt axial force testing fixture, comprising mounting plates arranged vertically opposite each other, a first vertical plate and a second vertical plate vertically arranged on the left and right sides of the mounting plates respectively, a sliding bracket arranged on the right side between the two mounting plates, a through slot in the middle of the sliding bracket, a support shaft vertically arranged in the middle of the slot, rolling bearings sleeved at both ends of the support shaft, a bolt anti-rotation block arranged on the right side of the slot, a locking groove for locking the test bolt on the side of the bolt anti-rotation block, a fixing nut corresponding to the end of the bolt locking the test bolt located on the outside of the second vertical plate, a torque wrench detachably sleeved on the outside of the fixing nut; an adjusting bolt passing through the middle of the first vertical plate, the adjusting bolt being horizontally arranged, a tension sensor arranged on the right side of the adjusting bolt, a locking bolt screwed to the right side of the tension sensor, the locking bolt passing through the sliding bracket and connected to the tension sensor, the rapid and accurate axial force testing can improve the efficiency of the production line.

[0005] Preferably, connecting blocks are arranged side by side on opposite outer sides of the mounting plate, and a back plate is provided on the rear side of the mounting plate, the back plate connecting the two mounting plates to enhance the overall structural strength.

[0006] Preferably, a washer is fitted on the bolt to be tested between the fixing nut and the second vertical plate to distribute pressure and protect the surface of the bolt and the tooling.

[0007] Preferably, a bolt support block is provided on the right side of the bolt anti-rotation block to further support the bolt to be tested.

[0008] Preferably, the right end of the sliding bracket is provided with an avoidance groove, which facilitates processing.

[0009] Preferably, the mounting plate is provided with an elongated mounting groove for mounting the rolling bearing, thereby fixing the rolling bearing.

[0010] Preferably, a locking nut is screwed onto the adjusting bolt on one side of the tension sensor, and the locking nut is used to fix the tension sensor.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] With its simple structure and convenient operation, it can be applied to the axial force testing of bolts, offering high installation efficiency, minimal reliance on installation personnel, and improved testing safety and efficiency. It solves the problem of existing testing equipment being cumbersome to operate and requiring professional personnel, thus resulting in low efficiency. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 These are three-dimensional structural diagrams of the present invention from different angles;

[0015] Figure 3 This is the front sectional view of the present invention.

[0016] Figure label:

[0017] 1. Mounting plate, 2. First vertical plate, 3. Second vertical plate, 4. Sliding bracket, 41. Slot, 42. Clearance slot, 5. Support shaft, 6. Rolling bearing, 7. Bolt to be tested, 8. Bolt anti-rotation block, 81. Snap-fit ​​slot, 9. Fixing nut, 10. Torque wrench, 11. Adjusting bolt, 12. Tension sensor, 13. Locking bolt, 14. Back plate, 15. Washer, 16. Bolt support block, 17. Connecting block, 18. Locking nut, 101. Mounting slot. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0019] like Figure 1-3 As shown, this utility model addresses the problem of cumbersome operation procedures and low efficiency caused by the need for professional personnel in existing testing equipment by providing the following technical solution: A bolt axial force testing fixture includes mounting plates 1 arranged vertically opposite each other to support the entire testing fixture and forming the basic structure of the entire device. A first vertical plate 2 and a second vertical plate 3 are vertically arranged on the left and right sides of the mounting plates 1, respectively. A sliding bracket 4 is provided on the right side between the two mounting plates 1. A through slot 41 is provided in the middle of the sliding bracket 4, and a support shaft 5 is vertically arranged in the middle of the slot 41. Rolling bearings 6 are sleeved at both the upper and lower ends of the support shaft 5. A... A bolt anti-rotation block 8 is provided, and the side of the bolt anti-rotation block 8 is provided with a locking groove 81 for locking the test bolt 7. The end of the bolt 7 that locks the test bolt is located on the outside of the second vertical plate 3 and is provided with a fixing nut 9. A torque wrench 10 is detachably sleeved on the outside of the fixing nut 9. An adjusting bolt 11 is passed through the middle of the first vertical plate 2. The adjusting bolt 11 is horizontally set. A tension sensor 12 is provided on the right side of the adjusting bolt 11. A locking bolt 13 is screwed to the right side of the tension sensor 12. The locking bolt 13 passes through the sliding bracket 4 and is connected to the tension sensor 12. The rapid and accurate axial force test can improve the efficiency of the production line.

[0020] In this embodiment, as Figure 1As shown, connecting blocks 17 are arranged side by side on opposite outer sides of the mounting plate 1, and a back plate 14 is provided on the rear side of the mounting plate 1. The back plate 14 connects the two mounting plates 1 to enhance the overall structural strength.

[0021] In this embodiment, as Figure 3 As shown, a washer 15 is fitted on the bolt 7 to be tested between the fixing nut 9 and the second vertical plate 3 to distribute pressure and protect the surface of the bolt and the tooling.

[0022] In this embodiment, as Figure 1 As shown, a bolt support block 16 is provided on the right side of the bolt anti-rotation block 8 to further support the bolt 7 to be tested.

[0023] In this embodiment, as Figure 1 As shown, the right end of the sliding bracket 4 is provided with an avoidance groove 42, which is convenient for processing.

[0024] In this embodiment, as Figure 3 As shown, the mounting plate 1 is provided with a long strip-shaped mounting groove 101 for mounting the rolling bearing 6, which is used to fix the rolling bearing 6.

[0025] In this embodiment, as Figure 2 As shown, a locking nut 18 is screwed onto the adjusting bolt 11 on one side of the tension sensor 12, and the locking nut 18 is used to fix the tension sensor 12.

[0026] In this embodiment, as Figure 1 As shown, the connecting block 17 is fixed on the workbench. Based on the specifications of the bolt 7 to be tested, select appropriate adjusting bolts 11, bolt anti-rotation blocks 8, bolt support blocks 16, washers 15, and fixing nuts 9. Select appropriate force-applying rods based on the testing requirements of the bolt 7 to be tested. Tighten the bolt 7 to be tested and the fixing nut 9 using a torque wrench 10. During the test, by continuously rotating the fixing nut 9, the bolt 7 to be tested, through the rolling bearing 6 and support shaft 5, ensures that the sliding bracket 4 will not deflect and will slide smoothly. The adjusting bolt 11, locking nut 18, tension sensor 12, and locking bolt 13 are connected to the sliding bracket 4, so the entire device experiences equal forces on the same axis. The tension force on the tension sensor 12 is the axial force of the bolt 7 to be tested. Specifically, when testing bolts 7 of different specifications, use replaceable adjusting bolts 11 to fix the tension sensor 12, thereby adjusting the distance between the sliding bracket 4 and the mounting surface of the matching fixing nut 9. Simultaneously, replace bolt anti-rotation blocks 8 and bolt support blocks 16 of different specifications.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A fixture for testing the axial force of a bolt, characterized in that, include: The mounting plates (1) are arranged opposite each other. The first vertical plate (2) and the second vertical plate (3) are respectively vertically arranged on the left and right sides of the mounting plates (1). A sliding bracket (4) is arranged on the right side between the two mounting plates (1). A slot (41) is provided in the middle of the sliding bracket (4). A support shaft (5) is vertically arranged in the middle of the slot (41). Rolling bearings (6) are sleeved on both the upper and lower ends of the support shaft (5). A bolt anti-rotation block (8) is provided on the right side of the slot (41). A locking groove (81) for locking the test bolt (7) is provided on the side of the bolt anti-rotation block (8). A fixing nut (9) is provided on the outside of the second vertical plate (3) at the end of the fixing nut (9). A torque wrench (10) is detachably sleeved on the outside of the fixing nut (9). An adjusting bolt (11) is inserted through the middle of the first vertical plate (2). The adjusting bolt (11) is horizontally set. A tension sensor (12) is set on the right side of the adjusting bolt (11). A locking bolt (13) is screwed to the right side of the tension sensor (12). The locking bolt (13) passes through the sliding bracket (4) and is connected to the tension sensor (12).

2. The bolt axial force testing fixture according to claim 1, characterized in that: Connecting blocks (17) are arranged side by side on opposite outer sides of the mounting plate (1), and a back plate (14) is arranged on the rear side of the mounting plate (1).

3. The bolt axial force testing fixture according to claim 1, characterized in that: A washer (15) is fitted on the bolt (7) to be tested between the fixing nut (9) and the second vertical plate (3).

4. The bolt axial force testing fixture according to claim 1, characterized in that: A bolt support block (16) is provided on the right side of the bolt anti-rotation block (8).

5. The bolt axial force testing fixture according to claim 1, characterized in that: The right end of the sliding bracket (4) is provided with a clearance groove (42).

6. The bolt axial force testing fixture according to claim 1, characterized in that: The mounting plate (1) is provided with a long strip-shaped mounting groove (101) for mounting the rolling bearing (6).

7. The bolt axial force testing fixture according to claim 1, characterized in that: A locking nut (18) is screwed onto the adjusting bolt (11) on one side of the tension sensor (12).

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