Clamp

Abstract

The utility model relates to a clamp, the clamp is used for fixing a screw in a tension testing machine, the screw is sleeved with two nuts, the clamp comprises a clamp body and two clamp sleeves, the clamp body comprises two fixing pieces, the two clamp sleeves are used for being fixed to two tensioning ends of the tension testing machine respectively, the clamp sleeves are used for being connected with the fixing pieces in a clamped mode, and the two fixing pieces are connected with the clamp body in a clamped mode. The fixing piece defines a first mounting position and a second mounting position, the first mounting position is used for fixing a nut, the second mounting position is used for fixing a screw rod, the fixing piece comprises two fixing parts, and the two fixing parts are spliced to jointly define the first mounting position and the second mounting position. According to the clamp provided by the invention, the two clamp sleeves are used for tensioning the two fixing parts, and the positioning acting force between the screw rod and the fixing parts is enhanced due to the limiting of the fixing parts on the nuts, so that the positioning of the screw rod cannot be separated from the fixing parts, and the accuracy of testing the tension strength of the screw rod by a tension tester is improved.

Description

Technical Field

[0001] The present application relates to the technical field of clamps, and in particular to a clamp. Background Art

[0002] In conventional technology, if the strength of a screw needs to be determined, a tensile tester is required to perform a tension test on the screw. However, due to the small size of the screw and the small contact area with the clamp, the screw is difficult to fix and is prone to breakage. Utility Model Content

[0003] The present application provides a clamp to solve the problem that a tensile testing machine cannot be positioned when testing the tensile strength of a screw rod.

[0004] The clamp according to the present application is used to fix a screw in a tensile testing machine, two nuts are sleeved on the screw, the clamp includes a clamp body and two clamp sleeves, the clamp body includes two fixing members, the two clamp sleeves are respectively used to be fixed to the two tensioning ends of the tensile testing machine, the clamp sleeves are used to clamp with the fixing members, the fixing members define a first mounting position and a second mounting position, the first mounting position is used to fix the nut, the second mounting position is used to fix the screw, the fixing member includes two fixing parts, the two fixing parts are spliced ​​to jointly define the first mounting position and the second mounting position.

[0005] According to the clamp of the present application, one of the fixing parts defines a first sub-groove and a second sub-groove arranged in sequence, and the other fixing part defines a third sub-groove and a fourth sub-groove arranged in sequence, the first sub-groove and the third sub-groove are planar symmetrical structures and jointly define the first installation position, and the second sub-groove and the fourth sub-groove are planar symmetrical structures and jointly define the second installation position.

[0006] According to the clamp of the present application, a first limiting portion is provided on the clamp sleeve, and a second limiting portion is provided on the outer wall of the fixing portion, and the first limiting portion is used for clamping with the second limiting portion.

[0007] Optionally, one of the first limiting portion and the second limiting portion is configured as a groove, and the other is configured as a boss, and the boss is used to be clamped in the groove.

[0008] Optionally, the groove is provided on the fixing portion and passes through both circumferential end edges of the fixing portion along the circumferential direction of the fixing portion.

[0009] Optionally, a positioning protrusion is provided on the end of the fixing portion away from the other fixing member, and the positioning protrusion is used to engage with a slot on the tensile testing machine.

[0010] According to the clamp of the present application, the circumferential outer walls of the two fixing parts include a curved outer wall and a flat outer wall arranged at both ends of the curved outer wall, and the curved outer wall protrudes toward the direction close to the clamp sleeve.

[0011] According to the clamp of the present application, the fixing portion is integrally formed.

[0012] Optionally, the fixing portion is a casting.

[0013] According to the clamp of the present application, the length of the first installation position is L1, and the length of the second installation position is L2, wherein L1≥4L2.

[0014] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0015] The clamp provided in the embodiment of the present application can utilize two nuts to be sleeved on the screw rod, and the screw rod and the nut can be fixed respectively through the first installation position and the second installation position, and the fixing parts can be fixed in the two clamp sleeves respectively, and the two clamp sleeves are respectively fixed to the two tensioning ends of the tensile testing machine, so that the two fixing parts can be tensioned by the two clamp sleeves. Since the fixing part limits the nut, the positioning force between the screw rod and the fixing part is enhanced, which ensures that the positioning of the screw rod will not be disengaged from the fixing part, thereby improving the accuracy of the tensile testing machine's test of the tensile strength of the screw rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0019] Figure 1 A three-dimensional diagram of a fixing portion of a clamp provided in an embodiment of the present application;

[0020] Figure 2 A top view of a fixing portion of a clamp provided in an embodiment of the present application;

[0021] Figure 3 A side view of a fixing portion of a clamp provided in an embodiment of the present application.

[0022] Description of reference numerals:

[0023] The clamp body 10 , the fixing member 11 , the first mounting position 111 , the first sub-groove 1111 , the second mounting position 112 , the second sub-groove 1121 , the fixing portion 113 , the second limiting portion 1131 , the positioning protrusion 1132 , the curved outer wall 1133 , and the planar outer wall 1134 . DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0025] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0026] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0027] like Figure 1 and Figure 2 As shown, the clamp according to the embodiment of the present application is used to fix a screw in a tensile testing machine, two nuts are sleeved on the screw, the clamp includes a clamp body 10 and two clamp sleeves, the clamp body 10 includes two fixing members 11, the two clamp sleeves are respectively used to be fixed to the two tensioning ends of the tensile testing machine, the clamp sleeves are used to clamp with the fixing members 11, the fixing members 11 define a first mounting position 111 and a second mounting position 112, the first mounting position 111 is used to fix the nut, the second mounting position 112 is used to fix the screw, the fixing member 11 includes two fixing parts 113, the two fixing parts 113 are spliced ​​to jointly define the first mounting position 111 and the second mounting position 112.

[0028] To elaborate, when the clamp is used in a tensile testing machine to perform a tension test on a screw, the two clamp sleeves are respectively fixed to the two tensioning ends of the tensile testing machine, and the clamp sleeves are clamped on the fixing member 11, thereby realizing the positioning and fixation of the fixing member 11, and the fixing member 11 defines a first mounting position 111 and a second mounting position 112. One fixing member 11 uses the first mounting position 111 to fix a nut, and uses the second mounting position 112 to fix the screw with a fixing part 113. Another fixing member 11 uses the first mounting position 111 to fix another nut, and uses the second mounting position 112 to fix the screw with a fixing part 113. When the tensile test starts, the two tensioning ends drive the fixing member 11 to move away from each other through the clamp sleeves, thereby realizing the tensioning of the screw. In this process, the position of the screw is fixed and tensioned using the nut and the fixing member 11.

[0029] The fixing member 11 includes two fixing parts 113, and the two fixing parts 113 are spliced ​​to jointly define a first installation position 111 and a second installation position 112, so that it is convenient to fix the screw and the nut. When the two fixing parts 113 are disassembled, the screw and the nut can be easily taken out. When the two fixing parts 113 are needed to fix the screw and the nut, the screw and the nut are first embedded in one fixing part 113, and the other fixing part 113 is snapped on it, so as to fix the screw and the nut.

[0030] According to the clamp of the embodiment of the present application, two nuts can be sleeved on the screw rod, and the screw rod and the nut can be fixed respectively through the first installation position 111 and the second installation position 112, and the fixing member 11 can be fixed in the two clamp sleeves respectively, and the two clamp sleeves are respectively fixed to the two tensioning ends of the tensile testing machine, so that the two fixing members 11 can be tensioned by the two clamp sleeves. Since the fixing member 11 limits the nut, the positioning force between the screw rod and the fixing member 11 is enhanced, which ensures that the positioning of the screw rod will not be disengaged from the fixing member 11, thereby improving the accuracy of the tensile testing machine's test of the tensile strength of the screw rod.

[0031] like Figure 1As shown, according to the clamp of the embodiment of the present application, one fixing portion 113 defines a first sub-groove 1111 and a second sub-groove 1121 arranged in sequence, and the other fixing portion 113 defines a third sub-groove and a fourth sub-groove arranged in sequence, the first sub-groove 1111 and the third sub-groove are planar symmetrical structures and jointly define the first mounting position 111, and the second sub-groove 1121 and the fourth sub-groove are planar symmetrical structures and jointly define the second mounting position 112.

[0032] In detail, the first sub-groove 1111 and the third sub-groove are planar symmetrical structures, and the second sub-groove 1121 and the fourth sub-groove are planar symmetrical structures, which can simplify the processing and manufacturing of the fixing part 113. At the same time, when fixing the screw and the nut, it can also simplify the operation. There is no need to separately identify the two fixing parts 113 that constitute a fixing part 11 to determine the assembly sequence with the screw and the nut.

[0033] In a specific embodiment, a sub-counterbore portion is provided on the fixing portion 113, and two sub-counterbore portions are spliced ​​to form a counterbore groove, so that when the nut is fixed in the first installation position 111, it can be embedded in the counterbore groove, thereby better positioning the nut.

[0034] like Figure 1 and Figure 2 As shown, according to the clamp of the embodiment of the present application, a first limiting portion is provided on the clamp sleeve, and a second limiting portion 1131 is provided on the outer wall of the fixing portion 113 , and the first limiting portion is used to be clamped with the second limiting portion 1131 .

[0035] In detail, a first limiting portion is provided on the clamp sleeve, and a second limiting portion 1131 is provided on the outer wall of the fixing portion 113. When the clamp sleeve clamps the fixing portion 113, the first limiting portion and the second limiting portion 1131 are engaged with each other, which can realize the positioning and limiting between the clamp sleeve and the fixing portion 113 on the one hand, and increase the contact area between the clamp sleeve and the fixing portion 113 on the other hand, thereby further reducing the possibility of loosening and misalignment between the fixing portion 113 and the clamp sleeve during the tensioning process.

[0036] It can be understood that the number of the first limiting portion is at least one, and the number of the second limiting portion 1131 is at least one. For example, in some embodiments, the number of the first limiting portion is one, and the number of the second limiting portion 1131 is one; for example, in some embodiments, the number of the first limiting portion is multiple, and the number of the second limiting portion 1131 is multiple, which is not limited in this application. The multiple can be two, three, four, etc.

[0037] In some embodiments, one of the first limiting portion and the second limiting portion 1131 is configured as a groove, and the other is configured as a boss, and the boss is used to be clamped in the groove. In this way, while achieving the positioning and limiting functions, the manufacturing difficulty of the first limiting portion and the second limiting portion 1131 can be reduced, thereby reducing the manufacturing cost.

[0038] like Figure 1 and Figure 2 As shown, in some embodiments, the groove is provided on the fixing portion 113 and passes through the circumferential end edges of the fixing portion 113 along the circumferential direction of the fixing portion 113 .

[0039] Specifically, the groove is provided on the fixing portion 113 and passes through the circumferential edges of the fixing portion 113 along the circumferential direction of the fixing portion 113. Accordingly, the boss extends along the extension direction of the groove, so that the contact area between the groove and the boss can be increased as much as possible within a limited space, and the possibility of loosening and misalignment between the fixing portion 113 and the clamp sleeve during the tensioning process can be further reduced. Simultaneously, the manufacturing difficulty of the fixing portion 113 can be reduced in this way.

[0040] like Figure 3 As shown, in some embodiments, a positioning protrusion 1132 is formed on the end of the fixing portion 113 away from the other fixing member 11 , and the positioning protrusion 1132 is used to engage with a slot on the tensile testing machine.

[0041] It is understandable that, when the positioning protrusion 1132 is engaged with the slot, it can further play a role in positioning and limiting the clamp body 10, thereby improving the installation accuracy, and further improving the accuracy of the tensile test of the screw by the tensile testing machine.

[0042] like Figure 1 and Figure 2 As shown, according to the clamp of the embodiment of the present application, the circumferential outer walls of the two fixing portions 113 include a curved outer wall 1133 and a flat outer wall 1134 provided at both ends of the curved outer wall 1133, and the curved outer wall 1133 protrudes toward the direction close to the clamp sleeve.

[0043] In detail, the circumferential outer walls of the two fixing parts 113 include a curved outer wall 1133 and a flat outer wall 1134 provided at both ends of the curved outer wall 1133. The curved outer wall 1133 protrudes toward the direction close to the clamp sleeve. It can be understood that the provision of the curved outer wall 1133 can increase the surface area of ​​the fixing part 113 on the one hand, thereby increasing the contact area between the fixing part 113 and the clamp sleeve as much as possible. At the same time, when the fixing part 113 is cast, the provision of the curved outer wall 1133 can reduce the difficulty of molding and improve the yield rate of the fixing part 113.

[0044] According to the clamp of the embodiment of the present application, the fixing portion 113 is formed in one piece, which can increase the overall structural strength of the fixing portion 113 and thus extend the service life of the fixing portion 113 .

[0045] In some embodiments, the fixing portion 113 is a casting, which can increase the overall structural strength of the fixing portion 113 and thus extend the service life of the fixing portion 113 .

[0046] like Figure 1 As shown, according to the clamp of the embodiment of the present application, the length of the first installation position 111 is L1, and the length of the second installation position 112 is L2, wherein L1≥4L2. It can be understood that in this way, the clamp can be adapted to screws of different lengths, and at the same time, the length of the fixing portion 113 can be increased, thereby increasing the contact area between the fixing portion 113 and the clamp sleeve, and further reducing the possibility of loosening and misalignment between the fixing portion 113 and the clamp sleeve during the tensioning process. Among them, L1 can be 4L2, L1 can be 5L2, etc.

[0047] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0048] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0049] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A clamp for fixing a screw in a tensile testing machine, characterized in that: Two nuts are sleeved on the screw rod, and the clamp includes a clamp body and two clamp sleeves. The clamp body includes two fixing parts, and the two clamp sleeves are respectively used to be fixed to the two tensioning ends of the tensile testing machine, and the clamp sleeves are used to be clamped with the fixing parts. The fixing parts define a first mounting position and a second mounting position, and the first mounting position is used to fix the nut, and the second mounting position is used to fix the screw rod. The fixing part includes two fixing parts, and the two fixing parts are spliced ​​to jointly define the first mounting position and the second mounting position.

2. The clamp according to claim 1, characterized in that: One of the fixing parts defines a first sub-groove and a second sub-groove arranged in sequence, and the other fixing part defines a third sub-groove and a fourth sub-groove arranged in sequence, the first sub-groove and the third sub-groove are planar symmetrical structures and jointly define the first mounting position, and the second sub-groove and the fourth sub-groove are planar symmetrical structures and jointly define the second mounting position.

3. The clamp according to claim 1, characterized in that: The clamp sleeve is provided with a first limiting portion, and the outer wall of the fixing portion is provided with a second limiting portion, and the first limiting portion is used for clamping with the second limiting portion.

4. The clamp according to claim 3, characterized in that: One of the first limiting portion and the second limiting portion is configured as a groove, and the other is configured as a boss, and the boss is used to be clamped in the groove.

5. The clamp according to claim 4, characterized in that: The groove is arranged on the fixing portion and passes through two circumferential end edges of the fixing portion along the circumferential direction of the fixing portion.

6. The clamp according to claim 5, characterized in that: A positioning protrusion is provided on the end of the fixing portion away from the other fixing member, and the positioning protrusion is used to be engaged with a slot on the tensile testing machine.

7. The clamp according to any one of claims 1 to 6, characterized in that: The circumferential outer walls of the two fixing parts include a curved outer wall and a flat outer wall arranged at two ends of the curved outer wall, and the curved outer wall protrudes toward a direction close to the clamp sleeve.

8. The clamp according to any one of claims 1 to 6, characterized in that: The fixing portion is integrally formed.

9. The clamp according to claim 8, characterized in that The fixing part is a casting.

10. The clamp according to any one of claims 1 to 6, characterized in that: The length of the first installation position is L1, and the length of the second installation position is L2, wherein L1≥4L2.

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