Nut guarantee load test device

Abstract

The utility model relates to the field of bolt measurement, in particular to a nut guarantee load test device. The test device comprises a hydraulic jack base (7), a hydraulic jack (9) is arranged on the hydraulic jack base (7), and a reaction frame (1) is arranged above a vertical support connected to the hydraulic jack base (7); a dynamometer (8) is mounted at the bottom of the reaction frame (1); a cushion block (2) is arranged below the dynamometer (8); a lower cushion block (6) is installed above the hydraulic jack (9), a clamp (5) is arranged on the lower cushion block (6), an inner hole of the clamp (5) is larger than the diameter of the bolt (3), and the outer diameter of the clamp (5) is larger than that of the nut (4). According to the utility model, the structure can be creatively and extremely simplified, and a large tension test can be conveniently and rapidly carried out, so that a nut is tested.

Description

TECHNICAL FIELD

[0001] The utility model relates to bolt determination field especially nut guarantee load test device. BACKGROUND

[0002] The nut can be said to be the most common workpiece, and the safety of the nut directly relates to the stability of the workpiece.

[0003] The "nut and load and clamp" as the abstract keyword is searched in the Chinese patent disclosure database, and the search time point is January 29, 2024. 137 articles were found, the closest comparison file is CN212321277U, a nut guarantee load pressure test clamp; the technology contains the following structure "the nut guarantee load pressure test clamp further includes a lifting device, the lifting device is fixed on the base, the lifting device includes an electric telescopic rod, the top of the electric telescopic rod is fixedly connected with a movable plate", which needs a separate electric telescopic rod.

[0004] According to the existing technical literature "Xinhua Dictionary", the top means arching from below.

[0005] However, in essence, the qualified degree of the nut is mainly whether the threads of the nut under large tension will slip, so the defects of the technology are:

[0006] 1. The structure is too complex; 2. Unable to load large force for tension test. INVENTION CONTENT

[0007] The purpose of the utility model: in order to provide the nut guarantee load test device with better effect, the specific purpose is seen in the multiple substantial technical effects of the specific implementation part.

[0008] In order to achieve the above purpose, the utility model takes the following technical scheme:

[0009] The nut guarantee load test device is characterized in that,

[0010] The test device contains a hydraulic jack base 7, a hydraulic jack 9 is arranged on the hydraulic jack base 7, and the vertical support connected on the hydraulic jack base 7 is provided with a counterforce frame 1 above;

[0011] A dynamometer 8 is installed at the bottom of the counterforce frame 1;

[0012] A cushion block 2 is installed below the dynamometer 8;

[0013] A lower cushion block 6 is installed above the hydraulic jack 9, a clamp 5 is arranged on the lower cushion block 6, the inner hole of the clamp 5 is larger than the diameter of the bolt 3, and the outer diameter of the clamp 5 is larger than the outer diameter of the nut 4.

[0014] The further technical scheme of the utility model lies in that the bolt 3 is installed on the clamp 5, and the axis of the bolt 3 and the clamp 5 center coincides.

[0015] The further technical scheme of the utility model lies in that the bottom surface of the nut 4 contacts with the surface of the clamp 5, the bolt 3 penetrates into the center hole of the clamp 5, and the height of the clamp 5 is greater than twice the pitch, so that the bottom of the bolt 3 is suspended.

[0016] The further technical scheme of the utility model lies in that the cushion block 2 is a steel cushion block, and the lower cushion block 6 is also a steel cushion block.

[0017] The further technical scheme of the utility model lies in that a recess is arranged on the hydraulic jack base 7, and the recess is used for accommodating the hydraulic jack 9.

[0018] The further technical scheme of the utility model lies in that the force meter 8 is installed on the counterforce frame 1 through the bolt.

[0019] The utility model with the above technical scheme has the following beneficial effects compared with the prior art: compared with the defects of the prior art "1. The structure is too complex; 2. It cannot load a large force to perform a tension test.", the patent can greatly simplify the structure, can conveniently and rapidly perform a large tension test, and further test the nut. DRAWINGS

[0020] In order to further illustrate the utility model, the following further illustrates in combination with the drawings:

[0021] Figure 1 It is a structural schematic view of the utility model;

[0022] Among them: 1. Counterforce frame; 2. Cushion block; 3. Bolt; 4. Nut; 5. Clamp; 6. Lower cushion block; 7. Hydraulic jack base; 8. Force meter; 9. Hydraulic jack. CONCRETE IMPLEMENTATION

[0023] The utility model is further illustrated below in combination with the drawings and specific embodiments, and it should be understood that the following specific embodiments are only used to illustrate the utility model and not to limit the scope of the utility model. In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom" and the like is based on the orientation or position relationship shown in the drawings, and is only used for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model. In addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0025] The present patent provides a variety of parallel schemes, and different expressions belong to improved schemes or parallel schemes based on the basic scheme. Each scheme has its own unique characteristics. In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict between them. The fixing mode not described in the text can be any one of the fixing modes such as screw fixing, bolt fixing or glue bonding.

[0026] Embodiment one: in combination with Figure 1 , the nut load test device is characterized in that,

[0027] The test device comprises a hydraulic jack base 7, a hydraulic jack 9 is arranged on the hydraulic jack base 7, and a counterforce frame 1 is arranged above the vertical support connected to the hydraulic jack base 7;

[0028] A load cell 8 is installed at the bottom of the counterforce frame 1;

[0029] A cushion block 2 is installed below the force gauge 8;

[0030] A lower cushion block 6 is installed above the hydraulic jack 9, and a clamp 5 is arranged on the lower cushion block 6, the inner hole of the clamp 5 is larger than the diameter of the bolt 3, and the outer diameter of the clamp 5 is larger than the outer diameter of the nut 4. The substantial technical effects and implementation process of the technical solution are as follows: the test device is a test device for detecting the load guarantee of the nut by axial compression method;

[0031] 1. A hydraulic jack is installed at the bottom of the counterforce frame; and a force gauge is installed on the counterforce frame;

[0032] 2. A steel cushion block is placed on the upper part of the hydraulic jack;

[0033] 3. A clamp is installed on the cushion block, the inner hole of the clamp is slightly larger than the diameter of the bolt, and the outer diameter of the clamp is larger than the outer diameter of the nut;

[0034] 4. The nut is installed on the bolt, and the bottom protrudes by not less than 2 times the pitch;

[0035] 5. The bolt is installed on the clamp, the bolt is coaxial with the axis of the clamp, the bottom surface of the nut is in contact with the surface of the clamp, the bolt is inserted into the center hole of the clamp, the height of the clamp is greater than 2 times the pitch, and the bottom of the bolt is suspended;

[0036] 6. A steel cushion block is installed at the bottom of the force gauge;

[0037] 7. The hydraulic jack is started, the piston is gradually extended upwards, and the top of the bolt is abutted against the bottom of the force gauge;

[0038] 8. The hydraulic jack is continuously loaded, the thrust of the jack is read by the force gauge; when the thrust reaches the design required load for 15 seconds, the jack is unloaded, and the loading test process is completed;

[0039] 9. The combination of the bolt and the nut is removed; whether the threads of the nut are damaged after the test is checked, so as to determine whether the nut is qualified.

[0040] 10. The test range is M24-M100.

[0041] Compared with the defects of the prior art "1. The structure is too complex; 2. It is impossible to load a large force for tension test.", the patent can greatly simplify the structure, facilitate rapid large tension test, and then test the nut. The bolt 3 can also be replaced by a screw rod.

[0042] Embodiment two: as a further improved scheme or parallel scheme or alternative independent scheme, the bolt 3 is installed on the clamp 5, and the bolt 3 coincides with the central axis of the clamp 5. The essential technical effect and the implementation process of the technical solution herein are as follows: the central axis coincides, which can avoid damage to the nut due to the central position.

[0043] Embodiment three: as a further improved scheme or parallel scheme or alternative independent scheme, the bottom surface of the nut 4 is in contact with the surface of the clamp 5, the bolt 3 penetrates the central hole of the clamp 5, and the height of the clamp 5 is greater than twice the pitch, so that the bottom of the bolt 3 is suspended. The essential technical effect and the implementation process of the technical solution herein are as follows: this embodiment can provide a preferred size selection, which can facilitate the testing of the nut.

[0044] Embodiment four: as a further improved scheme or parallel scheme or alternative independent scheme, the cushion block 2 is a steel cushion block; the lower cushion block 6 is also a steel cushion block. The essential technical effect and the implementation process of the technical solution herein are as follows: the effect of steel material is better and is not easy to be damaged.

[0045] Embodiment five: as a further improved scheme or parallel scheme or alternative independent scheme, a recess is arranged on the hydraulic jack base 7, and the recess is used to accommodate the hydraulic jack 9. The essential technical effect and the implementation process of the technical solution herein are as follows: the recess helps to accommodate the jack.

[0046] Embodiment six: as a further improved scheme or parallel scheme or alternative independent scheme, the force gauge 8 is installed on the counterforce frame 1 through a bolt. The essential technical effect and the implementation process of the technical solution herein are as follows: this embodiment provides a specific fixing structure, and similar implementation structures are within the protection scope of the patent.

[0047] Pioneeringly, each effect above exists independently, and a set of structures can also achieve the combination of the above results.

[0048] It should be noted that the multiple schemes provided by the patent contain basic schemes themselves, which are independent of each other and do not restrict each other, but they can also be combined with each other without conflict to achieve multiple effects together.

[0049] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed application.

Claims

1. Nut guarantee load test device, characterized in that, The test device comprises a hydraulic jack base (7), a hydraulic jack (9) is arranged on the hydraulic jack base (7), and a counterforce frame (1) is arranged above the vertical support connected on the hydraulic jack base (7); A force meter (8) is installed at the bottom of the counterforce frame (1); A cushion block (2) is installed below the force meter (8); A lower cushion block (6) is installed above the hydraulic jack (9), a clamp (5) is arranged on the lower cushion block (6), the inner hole of the clamp (5) is larger than the diameter of the bolt (3), and the outer diameter of the clamp (5) is larger than the outer diameter of the nut (4).

2. The nut proof load testing apparatus of claim 1, wherein, The bolt (3) is installed on the clamp (5), and the axis of the bolt (3) coincides with the center of the clamp (5).

3. The nut assurance load testing apparatus of claim 2, wherein, The bottom surface of the nut (4) is in contact with the surface of the clamp (5), the bolt (3) penetrates into the center hole of the clamp (5), and the height of the clamp (5) is greater than twice the pitch, so that the bottom of the bolt (3) is suspended.

4. The nut assurance load testing apparatus of claim 1, wherein The cushion block (2) is a steel cushion block; the lower cushion block (6) is also a steel cushion block.

5. The nut assurance load testing apparatus of claim 1, wherein A groove is arranged on the hydraulic jack base (7), and the groove is used to accommodate the hydraulic jack (9).

6. The nut assurance load testing apparatus of claim 1, wherein The force meter (8) is installed on the counterforce frame (1) by bolts.

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