A high-strength bolt torque axial force testing machine

Abstract

The application belongs to the technical field of bolt detection, and discloses a high-strength bolt torque axial force testing machine, which comprises a base, the top surface of the base is provided with a torque output device and a sliding box on the two sides respectively, a first insertion slot is formed in one end of the sliding box facing the torque output device, a second insertion slot is formed in one end of the traction clamping base facing the first insertion slot, a nut limiting insertion plate is vertically and insertionally connected in the first insertion slot, a bolt head fixing insertion plate is vertically and insertionally connected in the second insertion slot, a switching turntable is rotationally connected to one side of the sliding box located at the first insertion slot, and a plurality of continuous shaft sleeves suitable for nuts of different sizes are arranged in a ring shape on the switching turntable and are rotationally connected. Through the arrangement of the switching turntable, different continuous shaft sleeves can be quickly switched according to different specifications of the detected bolts, and the use is convenient and fast.

Description

Technical Field

[0001] This application relates to the field of bolt testing technology, and more specifically, to a high-strength bolt torque and axial force testing machine. Background Technology

[0002] With the continuous development of industrial and civil engineering systems, fasteners have become indispensable, especially in the construction of large-scale projects. Ordinary bolts can no longer meet the requirements, so the application of high-strength bolts is increasing. Against this backdrop, the increasing use of high-strength bolts, and considerations for public safety in engineering projects, have led to strict specifications for the mechanical properties of high-strength bolts by construction and acceptance parties. Mechanical performance testing of high-grade and large-specification high-strength bolts has become an important indicator required by manufacturers, users, and acceptance parties alike, giving rise to testing equipment for high-strength bolts.

[0003] Currently, bolt torsion testing machines are commonly used to test the torque and axial force of bolts. For example, Chinese patent CN218444783U discloses a bolt torsion testing machine, which includes a worktable. A reducer and a sliding box are respectively installed at both ends of the worktable. A servo motor is connected to the rear of the reducer. A torque sensor is mounted on the output shaft of the reducer via a coupling. A sleeve is connected to the end of the torque sensor away from the coupling. A guide rail is provided on the worktable, and a slide block is slidably connected to the guide rail. The sliding box is fixedly connected to the top of the slide block, and a U-shaped seat and a slide rail are provided inside the sliding box. The U-shaped seat is slidably connected to the sliding box via the slide rail. The side of the U-shaped seat facing the reducer has an inner baffle with a first through hole. The side of the sliding box facing the reducer has a nut baffle with a nut placement groove and a second through hole at the bottom. A locking screw is fixedly connected to the end of the U-shaped seat away from the reducer. One end of the locking screw passes through the sliding box and is fitted with an axial sensor and a locking nut. The axial sensor is fixedly installed on the sliding box, and the locking nut is screwed onto the locking screw. In use, the bolt's threaded portion passes through the first through hole, the second through hole, and the nut placement slot in sequence. The bolt head is pressed tightly against the inner baffle. The nut is screwed onto the bolt head. The U-shaped seat is slid to make the nut fit tightly against the nut placement slot. The sliding box is moved to allow the sleeve to enter the nut placement slot and fit onto the nut. The locking nut is rotated to make it fit against the axial sensor. The servo motor is started, and the torque and axial forces of the bolt are detected by the torque sensor and the axial sensor.

[0004] However, the existing equipment has poor adaptability of the fixtures for fixing the bolts to be tested. When connecting bolts of different specifications to the fixture before testing, it is necessary to select the corresponding inner baffle, outer baffle, and anti-rotation insert according to the bolt specifications. When testing bolts of different specifications, it is also necessary to select different bolt sleeves, which is time-consuming and labor-intensive, and the testing efficiency is low. Utility Model Content

[0005] To address the aforementioned issues, this application provides a high-strength bolt torque axial force testing machine.

[0006] The high-strength bolt torque axial force testing machine provided in this application adopts the following technical solution:

[0007] A high-strength bolt torque axial force testing machine includes a base. Torque output devices and a sliding box are respectively arranged on both sides of the top surface of the base. The sliding box is slidably connected to the base via a slide rail assembly. The output end of the torque output device faces the sliding box and is equipped with a torque sensor. A drive sleeve is installed at the end of the torque sensor facing the sliding box. A traction bracket is slidably connected inside the sliding box. A locking screw is fixedly connected to the end of the traction bracket away from the torque output device. The locking screw passes through the sliding box and is slidably connected thereto. An axial sensor is sequentially sleeved and threaded onto the outer end of the locking screw. The sliding box has a first slot at the end facing the torque output device, and a second slot at the end facing the first slot. A nut limiting plate is vertically inserted into the first slot, and a bolt head fixing plate is vertically inserted into the second slot. A switching turntable is rotatably connected to the sliding box on the side of the first slot. Several coupling sleeves suitable for nuts of different sizes are arranged in a ring and rotatably connected on the switching turntable. The coupling sleeves are coaxial with the drive sleeves, and the ends of the coupling sleeves facing the drive sleeves are all matched with the drive sleeves.

[0008] Furthermore, the first slot and the nut limiting plate have a T-shaped cross-section.

[0009] Furthermore, the nut limiting plate has a limiting groove formed from bottom to top along the central axis, and the width of the limiting groove is smaller than the nut of the bolt being tested.

[0010] Furthermore, the second slot and the bolt head fixing plate have a T-shaped cross-section.

[0011] Furthermore, a bolt head limiting hole is provided at the center of the bolt head fixing plate. The bolt head limiting hole matches the bolt head of the bolt being tested. The bolt head limiting hole is coaxial with the coupling sleeve and the drive sleeve.

[0012] Furthermore, a limiting slide rod is slidably and rotatably connected through the center of the switching turntable. The inner end of the limiting slide rod is fixedly connected to the sliding box, and a spring is sleeved between the outer end of the limiting slide rod and the switching turntable.

[0013] Furthermore, the switching turntable is provided with a number of positioning holes, the number and spacing of which correspond to the coupling sleeve. A positioning rod is slidably connected in the positioning hole, and the inner end of the positioning rod is fixedly connected to the sliding box.

[0014] In summary, this application includes at least one of the following beneficial technical effects:

[0015] (1) By switching the settings of the turntable, different coupling sleeves can be quickly switched according to different specifications of the bolts being tested, making it convenient and quick to use.

[0016] (2) By setting the bolt head fixing plate and the bolt head limiting hole, the bolt head of the bolt to be tested can be directly limited without the need for additional locking plate. At the same time, the nut part is blocked by the vertically inserted nut limiting plate, making the installation of the bolt to be tested more convenient and quick. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structural composition of this application;

[0018] Figure 2 This is a schematic diagram of the usage state structure of this application;

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 A schematic diagram of the structure for fixing the bolt head to the insert plate;

[0021] Figure 5 This is a schematic diagram of the switching turntable.

[0022] Explanation of the labels in the diagram:

[0023] 1. Base; 2. Torque output device; 3. Sliding box; 31. First slot; 32. Second slot; 33. Nut limit plate; 331. Limit slot; 34. Bolt head fixing plate; 341. Bolt head limit hole; 35. Switching turntable; 351. Limit slide rod; 352. Spring; 353. Positioning hole; 354. Positioning rod; 36. Coupling sleeve; 4. Slide rail assembly; 5. Torque sensor; 6. Drive sleeve; 7. Traction bracket; 8. Locking screw; 9. Axial sensor; 10. Adjustment knob. Detailed Implementation

[0024] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and 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 of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] Example 1:

[0028] The present application will be further described in detail below with reference to the accompanying drawings.

[0029] This application discloses a high-strength bolt torque axial force testing machine, including a base 1. Torque output devices 2 and sliding boxes 3 are respectively arranged on both sides of the top surface of the base 1. The sliding box 3 is slidably connected to the base 1 via a slide rail assembly 4. The output end of the torque output device 2 faces the sliding box 3 and is equipped with a torque sensor 5. A drive sleeve 6 is installed at the end of the torque sensor 5 facing the sliding box 3. A traction bracket 7 is slidably connected inside the sliding box 3. A locking screw 8 is fixedly connected to the end of the traction bracket 7 away from the torque output device 2. The locking screw 8 passes through the sliding box 3 and is slidably connected thereto. An axial sensor 9 is sequentially sleeved on the outer end of the locking screw 8 and threadedly connected to it. The sliding box 3 has a first slot 31 at one end facing the torque output device 2, and a second slot 32 at one end facing the first slot 31. A nut limiting plate 33 is vertically inserted into the first slot 31, and a bolt head fixing plate 34 is vertically inserted into the second slot 32. A switching turntable 35 is rotatably connected to one side of the sliding box 3 located in the first slot 31. Several coupling sleeves 36 suitable for nuts of different sizes are arranged in a ring and rotatably connected on the switching turntable 35. The coupling sleeves 36 are coaxial with the drive sleeve 6, and the ends of the coupling sleeves 36 facing the drive sleeve 6 are all matched with the drive sleeve 6.

[0030] Preferred, such as Figure 1 and Figure 2 As shown, the first slot 31 and the nut limiting plate 33 have a T-shaped cross-section.

[0031] Preferred, such as Figure 1 and Figure 3 As shown, the nut limiting plate 33 has a limiting groove 331 formed from bottom to top along the central axis, and the width of the limiting groove 331 is smaller than the nut of the bolt being tested.

[0032] Preferred, such as Figure 1 and Figure 2 As shown, the second slot 32 and the bolt head fixing plate 34 have a T-shaped cross-section.

[0033] Preferred, such as Figure 1 and Figure 4 As shown, a bolt head limiting hole 341 is provided at the center of the bolt head fixing plate 34. The bolt head limiting hole 341 matches the bolt head of the bolt being tested. The bolt head limiting hole 341 is coaxial with the coupling sleeve 36 and the drive sleeve 6.

[0034] Preferred, such as Figure 3As shown, the center of the switching turntable 35 is slidably and rotatably connected to a limiting slide rod 351. The inner end of the limiting slide rod 351 is fixedly connected to the sliding box 3, and a spring 352 is sleeved between the outer end of the limiting slide rod 351 and the switching turntable 35.

[0035] Preferred, such as Figure 3 and Figure 5 As shown, the switching turntable 35 is also provided with a number of positioning holes 353. The number and spacing of the positioning holes 353 correspond to the coupling sleeve 36. A positioning rod 354 is slidably connected in the positioning hole 353. The inner end of the positioning rod 354 is fixedly connected to the sliding box 3.

[0036] The implementation principle of a high-strength bolt torque axial force testing machine according to this application embodiment is as follows: During use, a matching bolt head fixing plate 34 is selected based on the bolt head size of the bolt to be tested. The bolt shank of the bolt to be tested is inserted into the bolt head limiting hole 341 from the side closest to the locking bolt 8. At this time, the bolt head of the bolt to be tested is engaged in the bolt head limiting hole 341 and cannot rotate. The nut of the bolt to be tested is tightened, with the degree of tightening determined by the end of the bolt being flush with the outer side of the nut. The bolt head fixing plate 34, along with the bolt to be tested, is inserted into the second slot 32. Then, the nut limiting plate 33 is inserted from above into the first slot 31, and the rotation adjustment... Adjust knob 10 to position the traction bracket 7 so that the nut of the bolt being tested is outside and in close contact with the nut limiting plate 33; then rotate the switching turntable 35 to select the matching coupling sleeve 36 to engage with the nut of the bolt being tested. Specifically, first pull the switching turntable 35 outward to allow the positioning rod 354 to slide out of the positioning hole 353, releasing the rotation restriction of the switching turntable 35. Rotate the switching turntable 35 to align the coupling sleeve 36 with the nut and release it. The coupling sleeve 36 engages with the nut, and simultaneously the positioning rod 354 slides into the corresponding positioning hole 353. Move the sliding box 3 towards the torque output device 2 so that the outer end of the coupling sleeve 36 engages with the drive rod sleeve. Start the torque output device 2, and the torque sensor 5 and axial sensor 9 can be used to detect the torque and axial force of the bolt. The specific testing methods and principles are well known to those skilled in the art and will not be described in detail in this application.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-strength bolt torque axial force testing machine, comprising a base (1), wherein a torque output device (2) and a sliding box (3) are respectively provided on both sides of the top surface of the base (1), the sliding box (3) is slidably connected to the base (1) through a slide rail assembly (4), the output end of the torque output device (2) faces the sliding box (3) and is equipped with a torque sensor (5), a drive sleeve (6) is installed at one end of the torque sensor (5) facing the sliding box (3), a traction card seat (7) is slidably connected inside the sliding box (3), a locking screw (8) is fixedly connected at one end of the traction card seat (7) away from the torque output device (2), the locking screw (8) passes through the sliding box (3) and is slidably connected thereto, and an axial sensor (9) is sequentially sleeved on the outer end of the locking screw (8) and threadedly connected to an adjustment knob (10), characterized in that: The sliding box (3) has a first slot (31) at one end facing the torque output device (2), and the traction card seat (7) has a second slot (32) at one end facing the first slot (31). A nut limiting plate (33) is vertically inserted into the first slot (31), and a bolt head fixing plate (34) is vertically inserted into the second slot (32). A switching turntable (35) is rotatably connected to one side of the sliding box (3) located in the first slot (31). Several coupling sleeves (36) suitable for nuts of different sizes are arranged in a ring on the switching turntable (35) and rotatably connected. The coupling sleeves (36) are coaxial with the drive sleeve (6), and the ends of the coupling sleeves (36) facing the drive sleeve (6) are all matched with the drive sleeve (6).

2. The high-strength bolt torque-axial force testing machine according to claim 1, characterized in that: The first slot (31) and the nut limiting plate (33) have a T-shaped cross-section.

3. The high-strength bolt torque-axial force testing machine according to claim 1, characterized in that: The nut limiting plate (33) has a limiting groove (331) opened from bottom to top along the central axis. The width of the limiting groove (331) is smaller than the nut of the bolt being tested.

4. The high-strength bolt torque-axial force testing machine according to claim 1, characterized in that: The second slot (32) and the bolt head fixing plate (34) have a T-shaped cross-section.

5. The high strength bolt torque axial force testing machine of claim 1, wherein: The bolt head fixing plate (34) has a bolt head limiting hole (341) at its center. The bolt head limiting hole (341) matches the bolt head of the bolt being tested. The bolt head limiting hole (341) is coaxial with the coupling sleeve (36) and the drive sleeve (6).

6. The high-strength bolt torque axial force testing machine according to claim 1, characterized in that: The center of the switching turntable (35) is slidably and rotatably connected to a limiting slide rod (351). The inner end of the limiting slide rod (351) is fixedly connected to the sliding box (3). A spring (352) is sleeved between the outer end of the limiting slide rod (351) and the switching turntable (35).

7. A high strength bolt torque axial force testing machine as claimed in claim 6, wherein: The switching turntable (35) is also provided with a number of positioning holes (353). The number and arrangement interval of the positioning holes (353) correspond to the coupling sleeve (36). A positioning rod (354) is slidably connected in the positioning hole (353). The inner end of the positioning rod (354) is fixedly connected to the sliding box (3).

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