Stretching clamp and stretching equipment

Abstract

The utility model relates to a stretching clamp and stretching equipment, the stretching clamp comprises a clamping body, an abutting part and a moving seat, the clamping body is provided with a clamping groove, an object to be stretched can be placed in the clamping groove, the clamping body is provided with a threaded hole, one end of the abutting part extends into the clamping groove, the abutting part is connected with the threaded hole of the clamping body, and the moving seat is connected with the abutting part. One end of the movable seat is in sliding connection with the bottom plate, the other end of the movable seat is connected with the tensile test device, and by adjusting the position of the movable seat on the bottom plate, it is guaranteed that the tensile test device can stably test objects to be stretched in the test process of the tensile test device; the longitudinal axis of the to-be-stretched object, the longitudinal axis of the tensile test device and the longitudinal axis of the tensile clamp coincide, so that the situation that the accuracy of product performance is affected by large deviation of tensile test data due to the size error of the to-be-stretched object is avoided.

Description

TECHNICAL FIELD

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

[0002] In GB / T 35467-2017 and GB / T 23457-2009 physical mechanical properties, there are "peeling strength with cement mortar" and "peeling strength with post-poured concrete" test items, which need to make a mortar plate with a thickness of 30mm-50mm, bond a (200*50)mm coiled material test piece on the mortar plate, and the bonding surface size of the coiled material test piece is (70*50)mm.

[0003] After the preparation of the coiled material test piece, the mortar plate needs to be installed on the clamp at one end of the tensile test device in the test process, and the end of the clamp without the coiled material is turned over 180° and clamped in the clamp at the other end of the tensile test device, so that the longitudinal axis of the coiled material test piece, the tensile test device and the clamp are coincident. The distance between the clamps is at least 100mm, and no pre-load is borne.

[0004] Since the thickness of the mortar plate cannot be consistent in each batch during the preparation process, the existing cement mortar plate clamp cannot guarantee that the longitudinal axis of the test piece coincides with the axis of the tensile test device and the clamp in the tensile test of the tensile test device, so the test data deviation of each batch is large, which has a certain influence on the accuracy of product performance. Content of the utility model

[0005] In order to solve the above technical problems, the present application provides a tensile clamp, which can guarantee that the longitudinal axis of the tensile object, the longitudinal axis of the tensile test device and the longitudinal axis of the tensile clamp are coincident in the tensile test of the tensile test device, and avoid that the size error of the tensile object itself leads to large tensile test data deviation, which has a certain influence on the accuracy of product performance.

[0006] The tensile clamp provided by the present application comprises: a clamping body comprising a first pressing plate, a bottom plate and a second pressing plate, the first pressing plate and the second pressing plate are respectively arranged at both ends of the bottom plate to form a clamping groove, and the first pressing plate and the second pressing plate are provided with threaded holes; a pressing component connected with the threaded hole of the first pressing plate or the second pressing plate and extending to the inside of the clamping groove at one end; and a moving seat slidably connected with the bottom plate at one end and connected with a tensile test device at the other end.

[0007] In some optional embodiments, the pressing component comprises a handle, a screw rod and a pressing plate, the screw rod is connected with the threaded hole of the first pressing plate or the second pressing plate, the pressing plate is arranged in the inside of the clamping groove, and the two ends of the screw rod in the axial direction are respectively connected with the handle and the pressing plate.

[0008] In some optional embodiments, the base plate is provided with a sliding groove, the moving seat comprises a sliding block and a fixed part, the sliding block is connected with one end of the fixed part, the sliding block is clamped in the sliding groove, and the fixed part is connected with the tensile testing device.

[0009] In some optional embodiments, the base plate has opposite upper and lower end faces, the first and second pressing plates are arranged on the upper end face, the lower end face is recessed towards the upper end face to form a sliding groove, and the base plate has a cross-sectional shape of the inner surface of the sliding groove consistent with a cross-sectional shape of the outer surface of the sliding block.

[0010] In some optional embodiments, the base plate has a cross-sectional shape of the inner surface of the sliding groove in the shape of a rectangle or a regular polygon, and the base plate further comprises first and second baffles arranged on the lower end face to form two ends of the sliding groove.

[0011] In some optional embodiments, the base plate has a cross-sectional shape of the inner surface of the sliding groove in the shape of an isosceles trapezoid, two parallel sides of the isosceles trapezoid extend from the upper end face to the lower end face, and the distance between the two parallel sides of the isosceles trapezoid decreases from the upper end face to the lower end face.

[0012] In some optional embodiments, the base plate has a cross-sectional shape of the inner surface of the sliding groove in the shape of a polygon enclosed by an arc and two isosceles lines, the arc is close to the upper end face, the arc corresponds to a central angle in the range of 210°-240°, the two isosceles lines are connected with two ends of the arc respectively, the isosceles lines extend from the ends of the arc to the lower end face, and the distance between the two parallel sides of the isosceles trapezoid decreases from the upper end face to the lower end face.

[0013] In some optional embodiments, the base plate has a cross-sectional shape of the inner surface of the sliding groove in the shape of a polygon connected by a rectangle and an isosceles trapezoid, the rectangle and the isosceles trapezoid are arranged from the upper end face to the lower end face, and the distance between the two parallel sides of the isosceles trapezoid decreases from the upper end face to the lower end face.

[0014] In some optional embodiments, the fixed part comprises a threaded stud, an extension rod, a locking nut and a limiting bolt, one end of the threaded stud is connected with one end of the screw rod, the other end of the threaded stud is connected with one end of the extension rod, the locking nut is connected with the threaded stud, and the limiting bolt penetrates through the extension rod.

[0015] In another aspect, the present application also provides a stretching device, comprising the stretching clamp and the stretching test device as described in any one of the above.

[0016] The present application has at least the following technical effects relative to the prior art:

[0017] The present application provides a stretching clamp, which comprises a clamping body, a pressing component and a moving seat. The clamping body comprises a first pressing plate, a bottom plate and a second pressing plate. The first pressing plate and the second pressing plate are respectively arranged at both ends of the bottom plate to form a clamping groove. A stretching object can be placed inside the clamping groove. The first pressing plate and the second pressing plate are provided with threaded holes. One end of the pressing component extends into the inside of the clamping groove. The end of the pressing component extending into the inside of the clamping groove and the other one of the first pressing plate and the second pressing plate jointly clamp a to-be-stretched component. The pressing component is connected with the threaded hole of one of the first pressing plate and the second pressing plate. The length of the pressing component extending into the inside of the clamping groove can be adjusted, so that the distance between the end of the pressing component and the first pressing plate or the second pressing plate can be adjusted. Therefore, the to-be-stretched component with different sizes can be adaptively clamped. One end of the moving seat is slidingly connected with the bottom plate, and the other end of the moving seat is connected with the stretching test device. By adjusting the position of the moving seat on the bottom plate, it is ensured that the longitudinal axis of the to-be-stretched component, the longitudinal axis of the stretching test device and the longitudinal axis of the stretching clamp coincide in the stretching test of the stretching test device. The to-be-stretched component is prevented from causing large deviation of the test data of the stretching test due to the error of its own size, which has a certain influence on the accuracy of the performance of the product. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a front view structural schematic diagram of the stretching clamp provided by the present application embodiment;

[0019] Figure 2 is a structural schematic diagram of the moving seat provided by the present application embodiment;

[0020] Figure 3 is a top view structural schematic diagram of the stretching clamp provided by the present application embodiment;

[0021] Figure 4 is a side view structural schematic diagram of the stretching clamp provided by the present application embodiment;

[0022] Figure 5 is a sectional view structural schematic diagram of the bottom plate provided by the first embodiment of the present application;

[0023] Figure 6 is a sectional view structural schematic diagram of the sliding block provided by the first embodiment of the present application;

[0024] Figure 7 is a sectional view structural schematic diagram of the bottom plate provided by the second embodiment of the present application;

[0025] Figure 8 is a cross-sectional structure schematic view of a slider provided by the second embodiment of the application;

[0026] Figure 9 is a cross-sectional structure schematic view of a base plate provided by the third embodiment of the application;

[0027] Figure 10 is a cross-sectional structure schematic view of a slider provided by the third embodiment of the application;

[0028] Figure 11 is a cross-sectional structure schematic view of a base plate provided by the fourth embodiment of the application;

[0029] Figure 12 is a cross-sectional structure schematic view of a slider provided by the fourth embodiment of the application.

[0030] Reference signs: 1 - clamping body; 11 - first pressing plate; 12 - base plate; 121 - sliding groove; 122 - first baffle; 123 - second baffle; 13 - second pressing plate; 2 - pressing component; 21 - handle; 22 - screw rod; 23 - third pressing plate; 3 - moving seat; 31 - slider; 32 - fixed part; 321 - stud; 322 - extension rod; 323 - locking nut; 324 - limiting bolt; a - article with stretching. DETAILED DESCRIPTION

[0031] In order to enable the above-mentioned purposes, features and advantages of the present application to be more clearly understood, the present application will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0032] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be practiced in other ways different from those described herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0033] In GB / T 35467-2017 and GB / T 23457-2009 physical mechanical properties, there are "peeling strength with cement mortar" and "peeling strength with post-cast concrete" test items, a mortar plate with a thickness of 30mm to 50mm needs to be made, a (200*50)mm coiled material test piece is bonded on the mortar plate, and the size of the coiled material test piece bonding surface is (70*50)mm.

[0034] After the preparation of the coiled material test piece, the mortar plate needs to be installed on the clamp at one end of the tensile testing device during the test, the clamp at the other end is turned over 180° and clamped in the clamp at the other end of the tensile testing device, so that the longitudinal axis of the coiled material test piece, the tensile testing device and the clamp are coincident. The distance between the clamps is at least 100mm, and no pre-load is applied.

[0035] Since the thickness of the mortar plate cannot be consistent in each batch during the preparation process, the existing cement mortar plate clamp cannot guarantee that the longitudinal axis of the test piece coincides with the axis of the tensile testing device and the clamp during the tensile testing device test, so the test data deviation of each batch is large, which has a certain influence on the accuracy of product performance.

[0036] In order to solve the above technical problems, the present application provides a tensile clamp, which can guarantee that the longitudinal axis of the tensile object, the longitudinal axis of the tensile testing device and the longitudinal axis of the tensile clamp coincide during the tensile testing device test, and avoid the tensile experimental test data deviation caused by the size error of the tensile object itself, which has a certain influence on the accuracy of product performance.

[0037] The present application provides a tensile clamp, as shown in Figures 1-4 The tensile clamp includes a clamping body 1, which includes a first pressing plate 11, a bottom plate 12 and a second pressing plate 13, the first pressing plate 11 and the second pressing plate 13 are respectively arranged at both ends of the bottom plate 12 to form a clamping groove, and the first pressing plate 11 and the second pressing plate 13 are provided with threaded holes; a pressing component 2 connected with the threaded hole of the first pressing plate 11 or the second pressing plate 13, one end of which extends to the inside of the clamping groove; a moving seat 3, one end of which is slidingly connected with the bottom plate 12, and the other end is connected with the tensile testing device.

[0038] Specifically, the stretching clamp comprises a clamping body 1, a pressing component 2 and a moving seat 3, the clamping body 1 comprises a first pressing plate 11, a bottom plate 12 and a second pressing plate 13, the first pressing plate 11 and the second pressing plate 13 are respectively arranged at two ends of the bottom plate 12 to form a clamping groove, an object to be stretched can be placed inside the clamping groove, the first pressing plate 11 and the second pressing plate 13 are provided with threaded holes, one end of the pressing component 2 extends into the inside of the clamping groove, the end of the pressing component 2 extending into the inside of the clamping groove and the other one of the first pressing plate 11 and the second pressing plate 13 jointly clamp the component to be stretched, the pressing component 2 is connected with the threaded hole of one of the first pressing plate 11 and the second pressing plate 13, the length of the pressing component 2 extending into the inside of the clamping groove can be adjusted, so that the distance between the end of the pressing component 2 and the first pressing plate 11 or the second pressing plate 13 is adjusted, so that the object to be stretched with different sizes can be adaptively clamped, one end of the moving seat 3 is slidingly connected with the bottom plate 12, the other end of the moving seat 3 is connected with the stretching test device, by adjusting the position of the moving seat 3 on the bottom plate 12, it is ensured that the longitudinal axis of the object to be stretched, the longitudinal axis of the stretching test device and the longitudinal axis of the stretching clamp coincide in the stretching test of the stretching test device, so that the deviation of the test data of the stretching experiment caused by the size error of the object to be stretched is avoided, and the accuracy of the product performance is affected to a certain extent.

[0039] In some optional embodiments, as shown in Figures 1-4 The pressing component 2 comprises a handle 21, a screw rod 22 and a third pressing plate 23, the screw rod 22 is connected with the threaded hole of the first pressing plate 11 or the second pressing plate 13, the third pressing plate 23 is arranged in the inside of the clamping groove, and the two ends of the screw rod 22 are respectively connected with the handle 21 and the third pressing plate 23.

[0040] Specifically, the third pressing plate 23 is arranged in the inside of the clamping groove, the first pressing plate 11 and the second pressing plate 13 are both provided with threaded holes, one end of the screw rod 22 extends through the threaded hole of one of the first pressing plate 11 and the second pressing plate 13 to extend into the inside of the clamping groove, the end of the screw rod 22 extending into the inside of the clamping groove is connected with the third pressing plate 23, one end of the screw rod 22 located outside the clamping body 1 is connected with the handle 21, and the end of the screw rod 22 extending into the inside of the clamping groove and the other one of the first pressing plate 11 and the second pressing plate 13 jointly clamp the component to be stretched, the length of the screw rod 22 extending into the inside of the clamping groove can be adjusted, so that the distance between the third pressing plate 23 and the other one of the first pressing plate 11 and the second pressing plate 13 is adjusted, so that the object to be stretched with different sizes can be adaptively clamped.

[0041] In some optional embodiments, as shown in Figures 1-4 The bottom plate 12 is provided with a sliding groove 121, the moving seat 3 comprises a sliding block 31 and a fixed part 32, the sliding block 31 is connected with one end of the fixed part 32, the sliding block 31 is clamped in the sliding groove 121, and the fixed part 32 is connected with the stretching test device.

[0042] Specifically, the bottom plate 12 is provided with a sliding groove 121, the sliding block 31 of the moving seat 3 is clamped in the sliding groove 121, and the sliding block 31 can move along the sliding groove 121, so that the moving seat 3 is in sliding connection with the bottom plate 12. The fixed part 32 of the moving seat 3 is connected with the tensile testing device, one end of the sliding block 31 is connected with the fixed part 32, the sliding block 31 can move along the sliding groove 121, so as to adjust the position of the moving seat 3 on the bottom plate 12, and ensure that the longitudinal axis of the object to be stretched, the longitudinal axis of the tensile testing device and the longitudinal axis of the stretching clamp coincide in the tensile testing device test, so as to avoid that the object to be stretched has a large deviation in the tensile test data due to the error of its own size, and has a certain influence on the accuracy of product performance.

[0043] In some optional embodiments, the bottom plate 12 has opposite upper and lower end faces, the first and second pressing plates 11 and 13 are arranged on the upper end face, and the lower end face is recessed towards the direction of the upper end face to form the sliding groove 121. The cross-sectional shape of the inner surface profile of the sliding groove 121 formed by the bottom plate 12 is consistent with the cross-sectional shape of the outer surface profile of the sliding block 31.

[0044] Specifically, the sliding groove 121 extends in the length direction of the bottom plate 12, the sliding groove 121 penetrates through the bottom plate 12, and the cross-sectional shape of the inner surface profile of the sliding groove 121 formed by the bottom plate 12 is consistent with the cross-sectional shape of the outer surface profile of the sliding block 31. The sliding block 31 can be matched with the sliding groove 121, and the sliding block 31 can move along the sliding groove 121 more smoothly, so as to avoid that the sliding block 31 falls from the inside of the sliding groove 121 in the moving process. The sliding block 31 can move along the sliding groove 121, so as to adjust the position of the moving seat 3 on the bottom plate 12, and ensure that the longitudinal axis of the object to be stretched, the longitudinal axis of the tensile testing device and the longitudinal axis of the stretching clamp coincide in the tensile testing device test, so as to avoid that the object to be stretched has a large deviation in the tensile test data due to the error of its own size, and has a certain influence on the accuracy of product performance.

[0045] In some optional embodiments, as shown in Figure 5 and Figure 6 , the cross-sectional shape of the inner surface of the sliding groove 121 formed by the bottom plate 12 is in the shape of a rectangle or a regular polygon, and the bottom plate 12 further includes a first baffle 122 and a second baffle 123. The first baffle 122 and the second baffle 123 are arranged on the lower end face to form two ends of the sliding groove 121.

[0046] Specifically, the cross-sectional shape of the sliding block 31 is rectangular or regular polygon, and the first baffle 122 and the second baffle 123 are arranged at the lower end surface to form two ends of the sliding groove 121, so as to avoid the sliding block 31 from falling out of the inside of the sliding groove 121 during movement. The sliding block 31 is in clearance fit with the inner surface of the sliding groove 121 formed by the bottom plate 12, so that the sliding block 31 can move smoothly in the inside of the sliding groove 121. The sliding block 31 can move along the sliding groove 121, so as to adjust the position of the moving seat 3 on the bottom plate 12, to ensure that the longitudinal axis of the object to be stretched, the longitudinal axis of the stretching test device and the longitudinal axis of the stretching clamp coincide in the stretching test device test, and to avoid that the object to be stretched has a large deviation in the stretching test data due to the error of its own size, which has a certain influence on the accuracy of product performance.

[0047] In some optional embodiments, as shown in Figure 7 and Figure 8 , the cross-sectional shape of the inner surface of the sliding groove 121 formed by the bottom plate 12 is isosceles trapezoid, and the two parallel sides of the isosceles trapezoid extend from the upper end surface to the lower end surface, and the distance between the two parallel sides of the isosceles trapezoid becomes smaller from the upper end surface to the lower end surface.

[0048] Specifically, the cross-sectional shape of the sliding block 31 is isosceles trapezoid, and the distance between the two parallel sides of the isosceles trapezoid becomes smaller from the upper end surface to the lower end surface in the direction close to the fixed part 32. The cross-sectional shape of the inner surface of the sliding groove 121 formed by the bottom plate 12 is isosceles trapezoid, and the two parallel sides of the isosceles trapezoid extend from the upper end surface to the lower end surface, and the distance between the two parallel sides of the isosceles trapezoid becomes smaller from the upper end surface to the lower end surface, so as to avoid the sliding block 31 from falling out of the inside of the sliding groove 121 during movement. Further, the bottom plate 12 further comprises the first baffle 122 and the second baffle 123, and the first baffle 122 and the second baffle 123 are arranged at the lower end surface to form two ends of the sliding groove 121, so as to further avoid the sliding block 31 from falling out of the inside of the sliding groove 121 during movement. The sliding block 31 is in clearance fit with the inner surface of the sliding groove 121 formed by the bottom plate 12, so that the sliding block 31 can move smoothly in the inside of the sliding groove 121. The sliding block 31 can move along the sliding groove 121, so as to adjust the position of the moving seat 3 on the bottom plate 12, to ensure that the longitudinal axis of the object to be stretched, the longitudinal axis of the stretching test device and the longitudinal axis of the stretching clamp coincide in the stretching test device test, and to avoid that the object to be stretched has a large deviation in the stretching test data due to the error of its own size, which has a certain influence on the accuracy of product performance.

[0049] In some optional embodiments, as shown in Figure 9 and Figure 10As shown, the cross-sectional shape of the inner surface of the sliding groove 121 formed by the bottom plate 12 comprises a polygon enclosed by an arc line and two isosceles lines, the arc line is close to the upper end surface, the central angle of the arc line corresponds to a range of 210°-240°, and the two isosceles lines are connected to the two ends of the arc line, respectively, and the isosceles trapezoid extends from the end of the arc line to the lower end surface, and the distance between the two legs of the isosceles trapezoid becomes smaller from the upper end surface to the lower end surface.

[0050] Specifically, the outer contour shape of the cross section of the sliding block 31 comprises a polygon enclosed by an arc line and two isosceles lines, the central angle of the arc line corresponds to a range of 210°-240°, and the two isosceles lines are connected to the two ends of the arc line, respectively, and the distance between the two legs of the isosceles trapezoid becomes smaller from one end to the other end, avoiding the sliding block 31 from falling off from the inside of the sliding groove 121 during movement. The distance between the two ends of the arc line corresponding to the outer contour of the cross section of the sliding block 31 is greater than or equal to the maximum distance between the two legs of the isosceles trapezoid part of the inner surface of the sliding groove 121 formed by the bottom plate 12, avoiding the sliding block 31 from falling off from the inside of the sliding groove 121 during movement.

[0051] Further, the bottom plate 12 further comprises a first baffle 122 and a second baffle 123, the first baffle 122 and the second baffle 123 are arranged at the two ends of the lower end surface forming the sliding groove 121, further avoiding the sliding block 31 from falling off from the inside of the sliding groove 121 during movement. The sliding block 31 is in clearance fit with the inner surface of the sliding groove 121 formed by the bottom plate 12, so that the sliding block 31 can move smoothly inside the sliding groove 121. The sliding block 31 can move along the sliding groove 121, thereby adjusting the position of the moving seat 3 on the bottom plate 12, ensuring that the longitudinal axis of the object to be stretched, the longitudinal axis of the stretching test device and the longitudinal axis of the stretching clamp coincide in the stretching test device test, avoiding that the object to be stretched has a large deviation in the stretching test data due to the error of its own size, which has a certain influence on the accuracy of product performance.

[0052] In some optional embodiments, as shown in Figure 11 and Figure 12 As shown, the cross-sectional shape of the inner surface of the sliding groove 121 formed by the bottom plate 12 is a polygon formed by a rectangle and an isosceles trapezoid, the rectangle and the isosceles trapezoid are arranged from the upper end surface to the lower end surface, and the distance between the two legs of the isosceles trapezoid becomes smaller from the upper end surface to the lower end surface.

[0053] Specifically, the cross-sectional shape of the sliding block 31 is a polygon formed by a rectangle and an isosceles trapezoid, the distance between the two legs of the isosceles trapezoid becomes smaller from one end to the other end, and the width of the rectangular part of the sliding block 31 is greater than or equal to the maximum distance between the two legs of the isosceles trapezoid part of the inner surface of the sliding groove 121 formed by the bottom plate 12, avoiding the sliding block 31 from falling off from the inside of the sliding groove 121 during movement.

[0054] Further, the bottom plate 12 further comprises a first baffle 122 and a second baffle 123, the first baffle 122 and the second baffle 123 are arranged at both ends of the lower end face forming the sliding groove 121, further avoiding the sliding block 31 from falling out of the inside of the sliding groove 121 during movement. The sliding block 31 is in clearance fit with the inner surface of the sliding groove 121 formed by the bottom plate 12, so that the sliding block 31 can move smoothly in the inside of the sliding groove 121. The sliding block 31 can move along the sliding groove 121, thereby adjusting the position of the moving seat 3 on the bottom plate 12, ensuring that the longitudinal axis of the object to be stretched, the longitudinal axis of the stretching test device and the longitudinal axis of the stretching clamp coincide in the stretching test device test, avoiding that the object to be stretched has a large deviation in the stretching test data due to the error of its own size, which has a certain influence on the accuracy of product performance.

[0055] In some optional embodiments, the fixing part 32 comprises a threaded stud 321, an extension rod 322, a locking nut 323 and a limiting bolt 324, one end of the threaded stud 321 is connected with the sliding block 31, the other end of the threaded stud 321 is connected with one end of the extension rod 322, the locking nut 323 is connected with the threaded stud 321, and the limiting bolt 324 penetrates through the extension rod 322.

[0056] Specifically, one end of the threaded stud 321 is welded with the sliding block 31, the other end of the threaded stud 321 is welded with one end of the extension rod 322, the locking nut 323 is in threaded connection with the threaded stud 321, the locking nut 323 can move in the length direction of the threaded stud 321, by adjusting the position of the locking nut 323 on the threaded stud 321, thereby adjusting the tightness of the stretching clamp fixed on the stretching test device. The limiting bolt 324 penetrates through the extension rod 322 and the fixing position of the stretching test device, thereby further fixing the stretching clamp on the stretching test device, improving the firmness of the connection between the stretching clamp and the stretching test device.

[0057] The application also provides a stretching device, which comprises the stretching clamp and the stretching test device mentioned in any one of the above.

[0058] In the present application, the term "a plurality of" refers to at least two or at least two more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, or detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "a specific embodiment", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A tensile grip, characterized in that, include: The clamping body (1) includes a first pressure plate (11), a base plate (12), and a second pressure plate (13). The first pressure plate (11) and the second pressure plate (13) are respectively disposed at both ends of the base plate (12) to form clamping grooves. The first pressure plate (11) and the second pressure plate (13) are provided with threaded holes. The pressing component (2) is connected to the threaded hole of the first pressure plate (11) or the second pressure plate (13), and one end extends into the interior of the clamping groove; The movable seat (3) is slidably connected at one end to the base plate (12) and at the other end to the tensile testing device.

2. The tensile grip of claim 1, wherein, The pressing component (2) includes a handle (21), a screw (22) and a third pressure plate (23). The screw (22) is connected to the threaded hole of the first pressure plate (11) or the second pressure plate (13). The third pressure plate (23) is disposed inside the clamping groove. The two ends of the screw (22) in the axial direction are respectively connected to the handle (21) and the third pressure plate (23).

3. The tensile grip of claim 1 wherein, The base plate (12) is provided with a sliding groove (121), the movable seat (3) includes a slider (31) and a fixing part (32), the slider (31) is connected to one end of the fixing part (32), the slider (31) is locked in the sliding groove (121), and the fixing part (32) is connected to the tensile testing device.

4. The tensile grip of claim 3, wherein, The base plate (12) has an upper end face and a lower end face, the first pressure plate (11) and the second pressure plate (13) are disposed on the upper end face, and the lower end face is recessed in the direction of the upper end face to form the sliding groove (121). The cross-sectional shape of the inner surface contour of the sliding groove (121) formed by the base plate (12) is consistent with the cross-sectional shape of the outer surface contour of the slider (31).

5. The tensile grip of claim 4, wherein, The bottom plate (12) forms a rectangular or regular polygon in the cross-sectional shape of the inner surface of the sliding groove (121). The bottom plate (12) also includes a first baffle (122) and a second baffle (123). The first baffle (122) and the second baffle (123) are disposed at both ends of the lower end face forming the sliding groove (121).

6. The tensile grip of claim 4 wherein, The bottom plate (12) forms an isosceles trapezoid in the cross-sectional shape of the inner surface of the sliding groove (121). The two waist lines of the isosceles trapezoid extend from the upper end face to the lower end face, and the distance between the two waist lines of the isosceles trapezoid decreases from the upper end face to the lower end face.

7. The tensile grip of claim 6, wherein, The cross-sectional shape of the inner surface of the sliding groove (121) formed by the base plate (12) includes a polygon formed by an arc line and two isosceles lines. The arc line is close to the upper end face. The central angle of the arc line is in the range of 210°~240°. The two isosceles lines are respectively connected to the two ends of the arc line. The isosceles lines extend from the end of the arc line to the lower end face. The distance between the two waist lines of the isosceles trapezoid decreases from the upper end face to the lower end face.

8. The tensile grip of claim 4 wherein, The bottom plate (12) forms the inner surface of the sliding groove (121) in a polygonal shape formed by a rectangle and an isosceles trapezoid arranged from the upper end surface to the lower end surface, and the distance between the two base lines of the isosceles trapezoid becomes smaller from the upper end surface to the lower end surface.

9. The tensile grip of claim 3 wherein, The fixed part (32) comprises a stud (321), an extension rod (322), a locking nut (323) and a limiting bolt (324), one end of the stud (321) is connected with the sliding block (31), the other end of the stud (321) is connected with one end of the extension rod (322), the locking nut (323) is connected with the stud (321), and the limiting bolt (324) penetrates through the extension rod (322).

10. A stretching apparatus characterized by, The tensile test device is connected with the tensile clamp.

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