A wire fixing seat for a tensile testing device

Abstract

The application belongs to the field of material mechanical property testing devices, and particularly relates to a silk thread fixing seat for a tensile testing device, which comprises a plate-shaped base, the base has a connecting end connected with a tensile testing machine, a silk thread fixing structure comprises a winding structure, a clamping block and a driving structure, the base has a folded edge for installing a driving screw rod, the driving screw rod has an anti-disengagement end head at one end and extends into a plug hole of the clamping block, a long groove is formed in a plate surface of the plate-shaped base, an anti-disengagement bolt is rotatably installed on the clamping block, the anti-disengagement bolt is perpendicular to the plate surface of the plate-shaped base and passes through the long groove, a head portion of the anti-disengagement bolt is directly or indirectly attached to a side surface of the plate-shaped base on a side opposite to the folded edge, a side surface of the clamping block is attached to the side surface of the plate-shaped base, a tail portion of the anti-disengagement bolt extends into the plug hole and is abutted against the anti-disengagement end head in an axial direction of the driving screw rod to achieve axial fixation of the clamping block and circumferential rotation of the clamping block on the driving screw rod, so that the silk thread fixing seat has a simple structure and is convenient to manufacture.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of material mechanical property testing device, and particularly relates to a silk thread fixing seat for a tensile testing device. BACKGROUND

[0002] In industrial production and laboratories, tensile testing of metal wires is often involved to obtain mechanical property parameters of the metal wires, such as spring finger silk used in the production of spring finger. The spring finger silk after each batch of heat treatment needs to be subjected to tensile strength detection to check whether the mechanical property value meets the standard requirement.

[0003] Compared with bars and plates, metal wires are more difficult to be reliably clamped and fixed by the clamping head of a tensile testing machine. Therefore, the prior art designs a special fixture for the tensile testing of the wires to cooperate with the testing machine to fix the end of the wire to be tested. For example, a tensile testing machine clamp disclosed in Chinese Utility Model Patent with the authorization announcement number CN202757835U and the authorization announcement date of February 27, 2013 is a clamp head structure, the jaws of the clamp head are two metal plate pieces, and during testing, the two metal plates are used to clamp the end of the metal wire to be tested. For another example, a steel wire tension testing machine clamp disclosed in Chinese Invention Patent with the application publication number CN110455618A and the application publication date of November 15, 2019 has a left clamp and a right clamp, the left and right clamps cooperate to form a jaw structure, and during testing, the left and right clamps are used to clamp the end of the wire to be tested. In the use process of the above-mentioned clamp type tensile testing machine clamp, a reliable clamping force is provided to the wire to ensure that the wire head is reliably fixed, but there is a hidden danger that the clamped part of the wire is easily damaged. Once the damage occurs, the damaged part will break before the test area during the tensile testing, resulting in invalid test data. Therefore, the prior art designs a non-clamp type tensile clamp.

[0004] For example, a steel wire tensile clamp disclosed in Chinese Utility Model Patent with the authorization announcement number CN201083656Y and the authorization announcement date of July 9, 2008 has a clamp body, a roller and a clamping device are arranged on the clamp body to fix the wire. Specifically, the roller surface is a winding surface, the clamping device has a driving structure for driving the pressing block to press against the roller and a guide mechanism for guiding the movement of the pressing block, and the pressing block has a wire clamping surface matched with the winding surface of the roller. During use, the wire is wound around the roller, and then the end of the wire is fixed by the pressing block and the roller.

[0005] For the installation mode of the driving structure of the pressing block on the clamping body, the driving structure of the wire winding type steel wire stretching clamp in the above-mentioned prior art installs the driving screw on the clamping body through the cooperation of the strip-shaped part and two bolts, and a guide pin is arranged on the strip-shaped part to cooperate with the pressing block to guide the action of the pressing block. For the cooperation mode of the driving screw of the driving structure and the pressing block, the driving screw end is connected with the pressing block through the cooperation of the anti-dropping end head and the special-shaped groove on the pressing block to realize the connection of the relative rotation in the circumferential direction and the axial anti-dropping. Thus, the relative independence of the guide structure and the connection structure of the pressing block and the driving screw is shown in the structure, and the driving screw needs to be installed on the clamping body through the bolt, which leads to the technical problems of the complex structure of the clamp, the large workload of the production and manufacture of parts and the overall assembly. SUMMARY

[0006] The purpose of the present application is to provide a wire fixing seat for a tensile testing device to solve the technical problems of the complex structure, the large workload of the production and manufacture of parts and the overall assembly of the wire fixing device for the tensile testing machine in the prior art.

[0007] To achieve the above-mentioned purpose, the technical scheme of the wire fixing seat for a tensile testing device provided by the present application is as follows:

[0008] A wire fixing seat for a tensile testing device, comprising a base, the base having a connecting end for connecting with a tensile testing machine, a clamping and fixing structure for fixing a wire to be tested being arranged on the base, the clamping and fixing structure comprising a wire winding structure and a wire clamping structure, the wire clamping structure comprising a wire clamping roller and a clamping block cooperating with the wire clamping roller, a driving structure for driving the clamping block to move close to and away from the wire clamping roller being installed on the base, the driving structure comprising a driving screw, one end of the driving screw being a screwing end, and the other end being axially fixed and circumferentially rotatable with the clamping block, the clamping block having a insertion hole, and the end of the driving screw inserted into the insertion hole having an anti-dropping end head, characterized in that the base is a plate-shaped base, the edge of the plate-shaped base having a folding edge perpendicular to the plate surface, the driving screw being screwed on the folding edge, a long slot being formed on the plate surface of the plate-shaped base, an anti-dropping bolt being screwed on the clamping block, the anti-dropping bolt being perpendicular to the plate surface of the plate-shaped base and passing through the long slot, the head of the anti-dropping bolt being on the side of the plate-shaped base opposite to the folding edge and directly or indirectly abutting the side surface of the plate-shaped base, the side surface of the clamping block abutting the side surface of the plate-shaped base, and the tail of the anti-dropping bolt being inserted into the insertion hole and abutting the anti-dropping end head in the axial direction of the driving screw.

[0009] The base has a connecting end, so that the wire fixing base can be installed on a tensile testing machine and used in cooperation with the tensile testing machine. The wire fixing base adopts a winding and clamping cooperation type fixing structure, so that the wire to be tested can be reliably fixed during the test, and the wire will not break in a non-test area. On the basis, the base is directly provided with a folded edge structure, the driving screw is directly screwed on the folded edge structure, the folded edge does not need to be machined to be installed on the plate-shaped base body, and the folded edge does not need to be screwed with a bolt during assembly. When the driving screw is installed on the plate-shaped base body, only the screwing operation of the driving screw is needed. At the same time, the anti-escape bolt is screwed on the clamping block to achieve the axial fixing and circumferential rotation of the clamping block on the driving screw, and a guide cooperation relationship is established between the clamping block and the plate-shaped base body, that is, the guide structure and the mounting structure are integrated, and the installation of the clamping block on the driving structure and the guide cooperation with the plate-shaped base are completed at the same time, so that the structure of the wire fixing base is simplified, and the assembly of the wire fixing base is more convenient and rapid.

[0010] As a further improvement, the clamping block has a guide block extending into the long groove, and the guide block is in guide cooperation with the long groove in the moving direction of the clamping block.

[0011] The head of the anti-escape bolt cooperates with the bottom surface of the clamping block to form a structure for clamping the plate-shaped base, realizes the guide cooperation of the clamping block and the plate-shaped base along the extension direction of the plate surface, and sets the guide block to cooperate with the long groove to guide the clamping block in the moving direction, realizes two-directional guide, ensures higher movement accuracy of the clamping block, and clamps the wire to be tested more reliably and less likely to damage the wire to be tested.

[0012] As a further improvement, the anti-escape bolt passes through the guide block.

[0013] The anti-escape bolt passes through the guide block, so that the guide block and the anti-escape bolt are arranged in the moving direction of the clamping block. Compared with staggered arrangement of the guide block and the anti-escape bolt, the guide block and the anti-escape bolt occupy less space in the guide groove, the length of the guide groove can be shorter under the same moving stroke of the clamping block, the workload of machining the guide groove is reduced, and the production and manufacturing efficiency of the wire fixing base is improved.

[0014] As a further improvement, a gasket is sleeved on the anti-escape bolt, and the head of the anti-escape bolt is attached to the side surface of the plate-shaped base through the gasket.

[0015] The radial dimension of the gasket is greater than the radial dimension of the head of the bolt matched therewith. Based on this, the anti-escape bolt is indirectly attached to the plate-shaped base through the gasket, so that the anti-escape bolt and the plate-shaped base have a larger guide cooperation contact surface, the guide surface can be effectively prevented from being inclined and stuck, and more stable and reliable guide cooperation is realized.

[0016] As a further improvement, the plate-shaped base is an axe-shaped plate, the plate body part corresponding to the axe handle constitutes the connecting end, the axe blade position is provided with the folding edge, and the winding structure and the clamping structure are arranged in a direction perpendicular to the axe handle.

[0017] The beneficial effect is that the base is provided with an axe-shaped structure, the winding structure and the connecting end can have the closest distance in the horizontal direction to avoid the test wire from being skewed under force when being stretched, and at the same time, the clamping structure and the corresponding driving structure are located on the side of the winding structure in the horizontal direction, so that the driving structure has a relatively spacious operating space on the side, facilitating the operator to operate the driving structure, that is, the overall layout of the connecting end, the winding structure and the clamping structure is more reasonable.

[0018] As a further improvement, the winding structure is a winding roller, and a winding groove around the roller surface is arranged on the roller surface of the winding roller.

[0019] The beneficial effect is that the winding groove can limit the test wire to prevent the test wire from being displaced under force during the stretching test and affecting the accuracy of the test result.

[0020] As a further improvement, the groove diameter of the winding groove is greater than the wire diameter of the test wire.

[0021] The beneficial effect is that the groove diameter of the winding groove is greater than the wire diameter of the test wire, so that the wire can be wound around the winding roller for one turn in the circumferential direction and the intersection part is still in the winding groove, so that the wire has a larger winding amount on the winding roller and ensures that the entire wound wire can be reliably limited.

[0022] As a further improvement, the clamping roller is assembled on the plate-shaped base.

[0023] The beneficial effect is that the clamping roller does not rotate and can stably cooperate with the clamping block to form a fixed clamping base, ensuring that the clamping structure can provide reliable clamping force for the wire.

[0024] As a further improvement, the end face of the clamping roller has a mounting shaft, the peripheral surface of the mounting shaft is circumferentially divided into a profiled surface part and a non-profiled surface part, the non-profiled surface part is provided with external threads at least at the part away from the clamping roller, the plate-shaped base has a mounting shaft matching hole, the mounting shaft matching hole and the mounting shaft are matched in rotation by the profiled surface, and a nut or a cap is screwed on the part of the mounting shaft protruding from the plate-shaped base to realize the installation of the clamping roller on the plate-shaped base.

[0025] The beneficial effect is that the installation shaft has the thread and the profile simultaneously, and has the thread fixing structure and the rotation stopping cooperation structure, wherein the installation shaft cooperates with the plate base in the rotation stopping cooperation aspect by the profile, the profile is convenient to process and does not need to set other rotation stopping cooperation pieces, so that the rotation stopping structure is extremely simple, the fixing installation aspect cooperates with the nut or the screw cap, so that the fixing structure is also relatively simple, the clamping roller is simply and conveniently installed on the plate base, and the structure of the wire fixing base is simple and convenient to manufacture.

[0026] As a further improvement, the winding structure is a winding roller, and the structure of the winding roller is the same as that of the clamping roller.

[0027] The beneficial effect is that the same structure is adopted, so that the winding roller and the clamping roller can be interchanged without separate design and processing and manufacturing, and the assembly also does not need to be distinguished, and the convenience of production and manufacturing of the wire fixing base is improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 FIG. 1 is a structure schematic view of the wire fixing base for the tensile test device in the embodiment 1 of the present application;

[0029] Figure 2 FIG. 2 is a structure schematic view of the winding roller of the wire fixing base for the tensile test device in the embodiment 1 of the present application;

[0030] Figure 3 FIG. 3 is a structure schematic view of the clamping driving structure of the wire fixing base for the tensile test device in the embodiment 1 of the present application;

[0031] Figure 4 FIG. 4 is a structure schematic view of the clamping block of the wire fixing base for the tensile test device in the embodiment 1 of the present application in the first view angle;

[0032] Figure 5 FIG. 5 is a structure schematic view of the clamping block of the wire fixing base for the tensile test device in the embodiment 1 of the present application in the second view angle;

[0033] Figure 6 FIG. 6 is a use state view of the wire fixing base for the tensile test device in the embodiment 1 of the present application;

[0034] Figure 7 FIG. 7 is a structure schematic view of the screw rod of the wire fixing base for the tensile test device in the embodiment 1 of the present application;

[0035] BRIEF DESCRIPTION OF DRAWINGS

[0036] 1, bottom plate; 2, connecting arm; 3, winding roller; 4, pinch roller; 5, clamping block; 6, roller body; 7, winding groove; 8, plug-in section; 9, threaded section; 10, folded edge; 11, screw; 12, locking bolt; 13, knob; 14, block; 15, guide block; 16, jack; 17, threaded hole; 18, guide groove; 19, anti-loose bolt; 20, rod body; 21, ring groove structure; 22, clamping curved surface; 23, silk. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application, i.e., the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application generally described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0038] Therefore, the detailed description of the embodiments of the present application provided below in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without making creative efforts fall within the scope of the present application.

[0039] It should be noted that the relationship terms such as "first" and "second" and the like that can appear are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any actual relationship or order between the entities or operations. Moreover, terms such as "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device 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 device. Without more limitations, the elements defined by the statement "including a" and the like do not exclude processes, methods, articles or devices including the elements from the process, method.

[0040] In the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" that can appear should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0041] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "provided with" should be interpreted broadly. For example, the object "provided with" can be a part of the main body, or it can be separately arranged from the main body and connected to the main body. This connection can be a detachable connection or a non-detachable connection. Those skilled in the art can understand the specific meaning of the above terms in this invention through specific circumstances.

[0042] The present invention will be further described in detail below with reference to the embodiments.

[0043] Specific embodiment 1 of the wire fixing seat for the tensile testing device provided by the present invention: as follows Figure 1 As shown, it includes a base plate 1 as a base, which is an axe-shaped plate with an axe-shaped structure. The part of the base plate 1 located at the axe handle is a connecting arm 2 that extends in a straight line. The connecting arm 2 serves as a connecting end and can cooperate with the clamping mechanism of the tensile testing machine to realize the installation of the wire fixing seat on the tensile testing machine.

[0044] To secure the end of the tested wire, a clamping and fixing structure for securing the end of the tested wire is also fixedly installed on the base plate 1, such as... Figure 1 As shown, the clamping and fixing structure includes a winding structure for winding the wire and a clamping structure for fixing the end of the wire. In this embodiment, the winding structure is a winding roller 3 fixed on the base plate 1, and the clamping structure includes a clamping roller 4 and a clamping block 5 fixed on the base plate 1. The clamping structure also includes a clamping drive structure for driving the clamping block 5 to reciprocate.

[0045] In this embodiment, the winding roller 3 and the clamping roller 4 have the same structure. The structure of the winding roller 3 and the clamping roller 4 will be described here using the winding roller 3 as an example. Specifically... Figure 2 As shown, the winding roller includes a roller body 6. The outer circumferential surface of the roller body 6 forms the winding surface of the winding structure. In this embodiment, a portion of the outer circumferential surface of the roller body 6 is recessed to form a winding groove 7. The winding groove 7 is used to limit the position of the wire to be tested, preventing displacement of the wire during the tensile test and affecting the accuracy of the test results. The groove diameter is slightly larger than the diameter of the wire, allowing the wire to wind a full circle around the roller body, and the wire crossing points are located within the winding groove to maintain their position.

[0046] The axial end of the roller body 6 has a mounting shaft with a diameter smaller than that of the roller body 6, which specifically includes a plug-in section 8 for plug-in cooperation with the base plate 1 and a threaded section 9. In order to mount the winding roller, a mounting shaft insertion hole is formed in the base plate 1. In this embodiment, the mounting shaft is a round rod structure with two planes machined on the peripheral surface, so that the peripheral surface of the mounting shaft is divided into a profiled surface part and a non-profiled surface part in the circumferential direction. The non-profiled surface part is the part of the peripheral surface reserved for the round rod. Correspondingly, the mounting shaft insertion hole is a waist-shaped hole, so that the plug-in section can be plug-in stopped on the base plate 1. The non-profiled surface part of the threaded section 9 is machined with threads and extends to the other side of the base plate 1, so as to be screw-cooperated with a nut or a cap to realize the fixation of the winding roller on the base plate 1.

[0047] The specific structure of the driving structure is shown in Figure 3 The base plate 1 has a fold edge 10 perpendicular to the axe-shaped plate at the axe blade of the axe-shaped plate. The driving structure includes a driving screw 11 screw-cooperated on the fold edge 10. The end of the driving screw 11 away from the winding roller 3 is a screwing end, which is fixed with a knob 13 through a locking bolt 12. As shown in Figure 3 and Figure 6 The peripheral surface of the end of the rod body 20 of the driving screw 11 towards the winding roller 3 has an annular groove structure 21, so as to form an anti-coming-off end head at the end of the driving screw 11 by machining the annular groove structure 21. Figure 3 、 Figure 4 and Figure 5 The structure of the clamping block 5 includes a block body 14 and a guide block 15 overhanging relative to the block body 14. The block body 14 is provided with an insertion hole 16 for the end of the driving screw 11. The guide block 15 and the block body 14 are provided with threaded through holes 17 in communication with the insertion hole 16. The end face of the block body 14 opposite to the end face provided with the insertion hole 16 is a clamping curved surface 22. The base plate 1 is provided with a long groove-shaped guide groove 18. In this embodiment, the center of the clamping curved surface 22 is 180°, so that the clamping block 5 has the largest possible cooperation surface with the winding roller 4. In this embodiment, the threaded through hole 17 passes through the guide block 15, so that the guide block 15 and the anti-coming-off bolt 19 are arranged in coincidence in the moving direction of the clamping block 5, and thus the guide groove 18 does not need to be too long. In other embodiments, the guide block can be located at other positions of the block body 14 in consideration of the angle of reducing the length of the threaded through hole. In this way, the threaded through hole does not need to pass through the guide block. As for the fold edge, it can be directly formed by bending or fixed on the base plate by welding.

[0048] As shown in Figure 3As shown, the one end of the driving screw 11 with the ring groove structure is inserted into the insertion hole 16, the anti-escape bolt 19 is screwed into the threaded hole 17, the end of the anti-escape bolt 19 is inserted into the ring groove structure of the driving screw 11, and the anti-escape bolt 19 is in abutting engagement with the anti-escape end head of the driving screw 11 along the axial direction of the driving screw 11, so that the clamping block 5 is axially prevented from escaping on the driving screw 11 and is rotatable in the circumferential direction. At the same time, the head of the anti-escape bolt 19 is in guiding engagement with the groove of the guide groove 18, that is, is in abutting engagement with the side of the back fold 10 of the bottom plate 1, and the side surface of the block body 14 is in abutting engagement with the side surface of the bottom plate 1, so that the block body 14 and the head of the anti-escape bolt 19 clamp the bottom plate 1 therebetween. Based on the abutting engagement between the side surface of the block body and the side surface of the bottom plate, the guide block can also be omitted.

[0049] In the overall layout, the winding roller 3, the clamping roller 4, the clamping block 5 and the driving structure are arranged in the horizontal direction, that is, in the direction perpendicular to the stretching direction of the wire, so that the operation space around the driving structure is relatively spacious, and the operator can conveniently perform the clamping operation. Based on such a position layout idea, when the wire is stretched in the horizontal direction, the winding roller, the clamping roller, the clamping block and the driving structure can be sequentially arranged from bottom to top.

[0050] As shown in Figure 7 Since the two ends of the wire 23 need to be fixed during the test, two wire fixing seats are arranged to cooperate with the tensile testing machine to perform the tensile test on the wire 23. The structures of the two wire fixing seats are mirror-symmetric. Taking the wire fixing seat on the upper side where the upper end of the wire is fixed as an example, the wire 23 is sequentially wound on the winding roller 3 and the clamping roller 4. After winding, the clamping roller 4 and the clamping block 5 cooperate to form a clamping structure to fix the end of the wire. In this embodiment, the wire 23 is specifically a spiral spring contact finger wire. In other embodiments, the wire fixing seat can be used in the tensile test of any wire.

[0051] The specific embodiment 2 of the wire fixing seat for the tensile test device provided by the application mainly differs from the specific embodiment 1 in that: in the specific embodiment 1, the winding structure is a winding roller which provides a wire guide surface for the wire. In this specific embodiment, the winding structure is a ring structure, that is, a winding ring. In other embodiments, the winding structure can be any structure which can provide a winding surface.

[0052] The specific embodiment 3 of the wire fixing seat for the tensile test device provided by the application mainly differs from the specific embodiment 1 in that: in the specific embodiment 1, the head of the anti-escape bolt directly abuts against the plate surface on the side of the back fold of the bottom plate. In this specific embodiment, a gasket is sleeved on the anti-escape bolt, and the head of the anti-escape bolt abuts against the plate surface on the side of the back fold of the bottom plate through the gasket. The abutting here is intended to express that the anti-escape bolt is guided by the head.

[0053] The specific embodiment 4 of the wire fixing seat of the tensile testing device provided by the application is mainly different from the embodiment 1 in that the mounting shaft is a screw rod, a key groove is formed on the peripheral surface of the screw rod, correspondingly, the mounting shaft fitting hole is a light hole with a key groove formed on the hole wall, after the bolt is inserted into the mounting shaft fitting hole, the rotation stopping piece is inserted into the key groove, then the nut or the cap is screwed on the part of the screw rod extending out of the mounting shaft fitting hole, and the rotation stopping installation of the wire clamping roller and the winding roller on the bottom plate is realized.

[0054] Finally, it should be noted that the above description is only the preferred embodiments of the present application, and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments without creative labor, or replace some technical features equivalently. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wire fixing seat for tensile testing device, comprising a base, the base having a connecting end for connecting with a tensile testing machine, a clamping fixing structure for fixing a wire (23) to be tested is arranged on the base, the clamping fixing structure comprises a winding structure and a wire clamping structure, the wire clamping structure comprises a wire clamping roller (4) and a clamping block (5) matched with the wire clamping roller (4), a driving structure for driving the clamping block (5) to move close to and away from the wire clamping roller (4) is installed on the base, the driving structure comprises a driving screw (11), one end of the driving screw (11) is a screwing end, the other end is axially fixed with the clamping block (5) and assembled together for circumferential rotation, the clamping block (5) has a insertion hole (16), the end of the driving screw (11) inserted into the insertion hole (16) has an anti-disengagement end head, characterized in that, The base is a plate base, the edge of the plate base has a folded edge (10) perpendicular to the plate surface, a drive screw (11) is screwed on the folded edge (10), a long slot is formed on the plate surface of the plate base, a anti-loose bolt (19) is screwed on the clamping block (5), the anti-loose bolt (19) is perpendicular to the plate surface of the plate base and passes through the long slot, the head of the anti-loose bolt (19) is on the side of the plate base opposite to the folded edge (10) and directly or indirectly abuts against the side surface of the plate base, the side surface of the clamping block (5) abuts against the side surface of the plate base, the tail of the anti-loose bolt (19) extends into the insertion hole (16) and abuts against the anti-loose end head in the axial direction of the drive screw (11).

2. The thread fixing seat for a tensile testing device according to claim 1, characterized in that, The clamping block (5) has a guide block (15) extending into the long slot, the guide block (15) is guided in the moving direction of the clamping block (5) by the long slot.

3. The wire fixing seat for a tensile testing device according to claim 2, characterized in that, The anti-loose bolt (19) passes through the guide block (15).

4. The thread fixing seat for a tensile testing device according to claim 1 or 2 or 3, characterized in that, A gasket is sleeved on the anti-loose bolt (19), the head of the anti-loose bolt (19) abuts against the side surface of the plate base through the gasket.

5. The thread fixing seat for a tensile testing device according to claim 1 or 2 or 3, characterized in that, The plate base is an axe-shaped plate, the plate body part corresponding to the handle of the axe-shaped plate constitutes the connecting end, the folded edge (10) is arranged at the position of the blade of the axe-shaped plate, the winding structure and the clamping structure are arranged in the direction perpendicular to the handle of the axe-shaped plate.

6. The thread fixing seat for a tensile testing device according to claim 1 or 2 or 3, characterized in that, The winding structure is a winding roller (3), the roller surface of the winding roller (3) is provided with a winding groove (7) surrounding the roller surface.

7. The wire fixing seat for a tensile testing device according to claim 6, characterized in that, The groove diameter of the winding groove (7) is greater than the wire diameter of the wire to be tested (23).

8. The wire fixing seat for a tensile testing device according to claim 1 or 2 or 3, characterized by, The clamping roller (4) is rotationally assembled on the plate base.

9. The wire fixing seat for a tensile testing device according to claim 8, characterized by The end surface of the clamping roller (4) has a mounting shaft, the peripheral surface of the mounting shaft is circumferentially divided into a profiled surface part and a non-profiled surface part, the non-profiled surface part is provided with an external thread at least at the part away from the clamping roller (4), the plate base is provided with a mounting shaft matching hole, the mounting shaft matching hole and the mounting shaft are rotationally matched through the profiled surface, and the mounting of the clamping roller (4) on the plate base is realized by screwing a nut or a cap on the part of the mounting shaft extending out of the plate base.

10. The thread fixing seat for a tensile testing device according to claim 1 or 2 or 3, characterized in that, The winding structure is a winding roller (3), the structure of the winding roller (3) is the same as that of the clamping roller.

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