CN212275426U

CN212275426U - Bolt fixing tool for bolt tensile test

Info

Publication number: CN212275426U
Application number: CN202020569078.6U
Authority: CN
Inventors: 魏波; 邢华平; 李冠男; 吴福林; 邓佳俊; 唐艺; 田洪军
Original assignee: Zhuhai Hengqin New District Construction Engineering Quality Inspection Center Co ltd
Current assignee: Zhuhai Hengqin New District Construction Engineering Quality Inspection Center Co ltd
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2021-01-01
Anticipated expiration: 2030-04-16

Abstract

The utility model discloses a bolt fixing tool for bolt tensile test, which comprises a first fixing clamp for fixing a screw rod and a second fixing clamp for fixing a nut; the first fixing clamp is hollowed to form a first installation space, the bottom of the first installation space is provided with a first stepped hole, and a first bushing matched with the head of the screw is embedded in the first stepped hole; a second mounting space is formed in the second fixing clamp in a hollow-out mode, a second stepped hole is formed in the bottom of the second mounting space, and a second bushing matched with a nut is embedded in the second stepped hole; ear plates are formed on two sides of the first fixing clamp and the second fixing clamp, and guide rods and guide holes which correspond to each other one by one are arranged on the ear plates of the first fixing clamp and the second fixing clamp respectively.

Description

Bolt fixing tool for bolt tensile test

Technical Field

The utility model relates to an engineering check out test set technical field especially relates to a bolt fastening frock for bolt tensile test.

Background

Tensile testing refers to a test method for determining material properties under an axial tensile load. The data obtained from the tensile testing can be used to determine the elastic limit, elongation, elastic modulus, proportional limit, area reduction, tensile strength, yield point, yield strength and other tensile property indicators of the material. The bolt is a common connecting piece in the building engineering, and the tensile property index of the bolt used for testing is very important for guaranteeing the engineering safety. When the tensile test is carried out, a bolt to be tested needs to be fixed on a clamp of a tensile test machine and is tested on the machine, and the relative rotation between a screw rod and a nut is ensured in the test process, otherwise, the accuracy of the test result is influenced.

Disclosure of Invention

An object of the utility model is to overcome prior art's is not enough, provides a novel structure, can prevent that bolt or nut from taking place to twist among the bolt tensile test and moving, the accurate bolt fastening frock that is used for bolt tensile test of guarantee test result.

In order to realize the above purpose, the utility model discloses the technical scheme who adopts is:

a bolt fixing tool for a bolt tensile test comprises a first fixing clamp for fixing a screw rod and a second fixing clamp for fixing a nut; the first fixing clamp is hollowed to form a first installation space, the bottom of the first installation space is provided with a first stepped hole, and a first bushing matched with the head of the screw is embedded in the first stepped hole; a second mounting space is formed in the second fixing clamp in a hollow-out mode, a second stepped hole is formed in the bottom of the second mounting space, and a second bushing matched with a nut is embedded in the second stepped hole; ear plates are formed on two sides of the first fixing clamp and the second fixing clamp, and guide rods and guide holes which correspond to each other one by one are arranged on the ear plates of the first fixing clamp and the second fixing clamp respectively.

The utility model has the advantages that: the utility model discloses a first mounting fixture and second mounting fixture can be used for fixed examination bolt's that awaits measuring screw rod and nut respectively to bolt through the examination that awaits measuring connects first mounting fixture and second mounting fixture, thereby guide arm and guide hole on its first mounting fixture of connection back and second mounting fixture otic placode can cooperate the grafting to lead nut and screw rod reverse tension in tensile test, thereby prevent thereby first mounting fixture and second mounting fixture rotation each other and avoid nut and screw rod to rotate the accuracy of guaranteeing the test in tensile test simultaneously.

Preferably, the first fixing clamp and the second fixing clamp are integrally formed. First mounting fixture and second mounting fixture adopt integrated into one piece structure can strengthen the structural stability of first mounting fixture and second mounting fixture autologous, prevent that first mounting fixture and second mounting fixture from drawing the effect and damaging in tensile test.

Preferably, the first bushing comprises a sleeve and a flange formed on the upper side of the sleeve, wherein the flange and the cross section of the first stepped hole are both polygonal structures, and the sleeve of the first bushing penetrates through the first stepped hole and protrudes out of the bottom surface of the first fixing clamp. The flange and the first stepped hole are of polygonal structures, and the first bushing and the first fixing clamp can be prevented from rotating mutually, so that the screw and the nut are further prevented from rotating mutually in a tensile test. In addition, the sleeve of first bush protrusion can be knocked out first bush from the bottom in first mounting fixture bottom surface after the test, easily dismantles and solves first bush extrusion deformation in the test process and lead to being difficult to the problem of dismantling with first shoulder hole interference fit.

Preferably, the second bushing includes a sleeve and a flange formed on an upper side of the sleeve, wherein the flange and the second stepped hole have polygonal cross sections, and the sleeve of the second bushing penetrates through the second stepped hole and protrudes from a bottom surface of the second fixing clamp. The flange and the second stepped hole are of polygonal structures, and the second bushing and the second fixing clamp can be prevented from rotating mutually, so that the screw and the nut are further prevented from rotating mutually in a tensile test. In addition, the sleeve of second bush protrusion can be knocked out the second bush from the bottom in second mounting fixture bottom surface after the test, easily dismantles and solves the second bush and extrude the problem that leads to being difficult to dismantle with second shoulder hole interference fit in the test procedure.

Preferably, a first mounting groove matched with the head of the screw and a through hole for the screw to penetrate through are formed in the sleeve of the first bushing. The first mounting groove is engaged with the head of the screw to prevent the screw and the first bush 3a from rotating with each other.

Preferably, a second mounting groove matched with the nut and a through hole for the screw to penetrate through are formed in the sleeve of the second bushing. The second mounting groove is embedded with the nut to prevent the nut and the second bush from rotating mutually.

Preferably, the guide rod is formed with a threaded portion, and the guide rod is in threaded connection with the lug plate. But adopt threaded connection convenient to detach between guide arm and the otic placode, at the in-process of assembly bolt, can demolish the guide arm earlier, then make during bolt and nut pack into first mounting fixture and second mounting fixture respectively to through making mutual rotation carry out threaded connection between screw rod and the nut, on both connect the guide arm to corresponding otic placode again after connecting, can be convenient for assemble.

Drawings

Fig. 1 is a side sectional view of the present invention.

Fig. 2 is a side sectional view of the first fixing jig of the present invention.

Fig. 3 is a side sectional view of a second fixing jig of the present invention.

Fig. 4 is a side sectional view of a first bushing of the present invention.

Fig. 5 is a side sectional view of a second bushing according to the present invention.

The mounting structure comprises a first fixing clamp 1, a first mounting space 11, a first stepped hole 111, a second fixing clamp 2, a second mounting space 21, a second stepped hole 211, a first bushing 3a, a second bushing 3b, a sleeve 31, a first mounting groove 311, a second mounting groove 312, a through hole 313, a flange 32, an ear plate 4, a guide rod 41 and a guide hole 42.

Detailed Description

The claimed technical solution of the present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 5, a bolt fixing tool for a bolt tension test in the present embodiment includes a first fixing jig 1 for fixing a screw and a second fixing jig 2 for fixing a nut. In the present embodiment, the first fixing jig 1 and the second fixing jig 2 are both of an integrally formed structure.

The first fixing clamp 1 is formed with a first mounting space 11 in a hollowed manner, the bottom of the first mounting space 11 is provided with a first stepped hole 111, a first bushing 3a matched with the head of the screw is embedded in the first stepped hole 111, the first mounting space 11 accommodates the first bushing 3a, and the hollowed opening of the first mounting space 11 can allow the first bushing 3a to pass through so that the first bushing 3a can be detached from the first mounting space 11. In this embodiment, the first bushing 3a includes a sleeve 31 and a flange 32 formed on an upper side of the sleeve 31, wherein the cross sections of the flange 32 and the first stepped hole 111 are both polygonal structures, the sleeve 31 of the first bushing 3a penetrates through the first stepped hole 111 and protrudes out of the bottom surface of the first fixing clamp 1, and a first mounting groove 311 for fitting the head of the screw and a through hole 313 for the screw to penetrate are formed in the sleeve 31 of the first bushing 3 a. The first fixing clip 1 is further formed with lug plates 4 at both sides thereof and guide holes 42 are opened in the lug plates 4.

The second fixing clamp 2 is hollowed to form a second mounting space 21, a second stepped hole 211 is formed in the bottom of the second mounting space 21, a second bushing 3b matched with a nut is embedded in the second stepped hole 211, the second mounting space 21 accommodates the second bushing 3b, and the hollowed opening of the second mounting space 21 can allow the second bushing 3b to pass through so that the second bushing 3b can be detached from the second mounting space 21. The second bushing 3b includes a sleeve 31 and a flange 32 formed on the upper side of the sleeve 31, wherein the cross sections of the flange 32 and the second stepped hole 211 are both polygonal structures, the sleeve 31 of the second bushing 3b penetrates through the second stepped hole 211 and protrudes out of the bottom surface of the second fixing clamp 2, and a second mounting groove 312 for fitting a nut and a through hole 313 for a screw to penetrate are formed in the sleeve 31 of the second bushing 3 b. Ear plates 4 are further formed on both sides of the second fixing clamp 2, and guide rods 41 are provided on the ear plates 4 to be engaged with the guide holes 42, wherein the guide rods 41 are formed with threaded portions in the present embodiment, and the guide rods 41 are threadedly coupled with the ear plates 4.

In this embodiment, the process of assembling the first fixing clamp 1, the second fixing clamp 2 and the bolt to be tested is as follows:

s1. first, the guide rod 41 is removed from the lug plate 4, and the screw is fitted into the first bush 3a while the nut is fitted into the second bush 3b, with the head of the screw fitted into the first fitting groove 311 in the first bush 3a and the nut fitted into the second fitting groove 312 in the second bush 3 b.

S2. the first bush 3a is fitted into the first stepped hole 111 of the first fixing jig 1, while the second bush 3b is fitted into the second stepped hole 211 of the second fixing jig 2.

S3, the screw rod and the nut are in butt joint with each other and are in threaded connection when the screw rod and the nut rotate mutually through the first fixing clamp 1 and the second fixing clamp 2.

And S4, aligning the ear plates 4 of the first fixing clamp 1 and the second fixing clamp 2, connecting the guide rod 41 to the ear plates 4 on two sides of the second fixing clamp 2 in a threaded manner, and inserting the guide rod 41 into the guide hole 42 of the first fixing clamp 1 to finish assembly.

And S5, operating the assembled first fixing clamp 1 and the second fixing clamp 2 on a machine for tensile test.

The above-described embodiments are merely preferred embodiments of the present invention, which are not intended to limit the present invention in any way. Those skilled in the art can make further changes and modifications to the invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention. Therefore, the content of the technical scheme of the utility model, according to the equivalent change made by the idea of the utility model, should be covered in the protection scope of the utility model.

Claims

1. The utility model provides a bolt fastening frock for bolt tensile test which characterized in that: the screw fixing device comprises a first fixing clamp (1) for fixing a screw and a second fixing clamp (2) for fixing a nut; the first fixing clamp (1) is hollowed to form a first mounting space (11), the bottom of the first mounting space (11) is provided with a first stepped hole (111), and a first bushing (3 a) matched with the head of a screw is embedded into the first stepped hole (111); a second mounting space (21) is formed in the second fixing clamp (2) in a hollow-out mode, a second stepped hole (211) is formed in the bottom of the second mounting space (21), and a second bushing (3 b) matched with a nut is embedded into the second stepped hole (211); ear plates (4) are formed on two sides of the first fixing clamp (1) and the second fixing clamp (2), and guide rods (41) and guide holes (42) which correspond to each other one by one are arranged on the ear plates (4) of the first fixing clamp (1) and the second fixing clamp (2) respectively.

2. The bolt fixing tool for the bolt tension test according to claim 1, characterized in that: the first fixing clamp (1) and the second fixing clamp (2) are integrally formed.

3. The bolt fixing tool for the bolt tension test according to claim 1, characterized in that: the first bush (3 a) comprises a sleeve (31) and a flange (32) formed on the upper side of the sleeve (31), wherein the cross sections of the flange (32) and the first stepped hole (111) are both polygonal structures, and meanwhile, the sleeve (31) of the first bush (3 a) penetrates through the first stepped hole (111) and protrudes out of the bottom surface of the first fixing clamp (1).

4. The bolt fixing tool for the bolt tension test according to claim 1, characterized in that: the second bush (3 b) comprises a sleeve (31) and a flange (32) formed on the upper side of the sleeve (31), wherein the cross sections of the flange (32) and the second stepped hole (211) are both polygonal structures, and meanwhile, the sleeve (31) of the second bush (3 b) penetrates through the second stepped hole (211) and protrudes out of the bottom surface of the second fixing clamp (2).

5. The bolt fixing tool for the bolt tension test according to claim 3, characterized in that: a sleeve (31) of the first bushing (3 a) is internally provided with a first mounting groove (311) matched with the head of the screw and a through hole (313) for the screw to penetrate through.

6. The bolt fixing tool for the bolt tension test according to claim 4, characterized in that: and a second mounting groove (312) matched with the nut and a through hole (313) for the screw to penetrate through are formed in the sleeve (31) of the second bushing (3 b).

7. The bolt fixing tool for the bolt tension test according to claim 1, characterized in that: the guide rod (41) is formed with a threaded part, and meanwhile, the guide rod (41) is in threaded connection with the lug plate (4).