Clamping tool for testing mechanical characteristics

Abstract

The utility model discloses a clamping tool for mechanical characteristic testing, which is applied to auxiliary testing of electrical equipment with an operating mechanism. Comprising a first clamping part, a second clamping part and a transmission part, the operating mechanism is provided with a switching-on and switching-off indicating disc, one side of the first clamping part is arranged on the outer side face of the switching-on and switching-off indicating disc, and the other side of the first clamping part is connected with the rotary speed measuring sensor. The top of the first clamping part is fixedly connected with the left bottom surface of the transmission part; the second clamping part is located on the inner side face of the opening and closing indicating dial. A guide rail is arranged at the bottom of the middle of the transmission part, a guide piece is arranged at the top of the second clamping part, the guide rail is matched with the guide piece, and the second clamping part is movably connected to the transmission part. The clamping tool is simple in overall structure and small in size, rapid clamping operation is achieved by pressing an external button of the clamping tool on the premise that the opening and closing indicating dial is not disassembled, meanwhile, the rotary speed measuring sensor and the opening and closing indicating dial are stably connected, the installation position is accurate, and therefore the accuracy of a measurement result is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology with operating mechanism, and in particular to a clamping fixture for testing mechanical characteristics. Background Technology

[0002] In the mechanical characteristic testing of electrical equipment with operating mechanisms, rotary velocimetry sensors are used to measure the required performance parameters. However, in actual testing, these sensors are prone to detachment, compromising the accuracy of test results and hindering installation efficiency.

[0003] To address the issue of unstable connection between the rotary speed sensor and the operating mechanism, existing technologies generally utilize an auxiliary tool: a sleeve head with the same diameter as the split / engagement indicator shaft; a nut is welded to the end of the sleeve tool, and the sleeve head and rotary speed sensor are connected via studs; the end of the split / engagement indicator shaft is connected, with three threaded holes; after removing the split / engagement indicator disc, the sleeve is positioned on the split / engagement indicator shaft, and the shaft is secured using three bolts before performance parameter testing. The above method has the following drawbacks:

[0004] 1. Removing the original engagement / disengagement indicator is prone to damage;

[0005] 2. Repeatedly installing and disassembling studs, bolts, fasteners, sleeves, and other parts wastes time and is inefficient;

[0006] 3. The overall testing and installation process cannot guarantee precise installation location or secure connection.

[0007] Therefore, there is an urgent need to study a clamping fixture for mechanical property testing to solve the above problems. Utility Model Content

[0008] To address the aforementioned technical deficiencies, this utility model provides a clamping fixture for testing mechanical properties. Without disassembling the operating mechanism's engagement / disengagement indicator, quick operation is achieved by pressing an external button on the clamping fixture. This ensures a secure connection between the rotational speed sensor and the engagement / disengagement indicator, guaranteeing accurate installation and thus ensuring the accuracy of the measurement results.

[0009] To achieve the above objectives, this utility model provides a clamping fixture for mechanical characteristic testing, applied to auxiliary testing of power equipment with an operating mechanism. The clamping fixture includes a first clamping part, a second clamping part, and a transmission part. The operating mechanism is equipped with a disengagement indicator. One side of the first clamping part is located on the outer side of the disengagement indicator, and the other side is connected to a rotational speed sensor for mechanical characteristic testing. The top of the first clamping part is fixedly connected to the bottom left side of the transmission part. The second clamping part is located on the inner side of the disengagement indicator. A guide rail is provided at the bottom center of the transmission part, and a guide member is provided at the top of the second clamping part. The guide rail and the guide member are adapted to each other, and the second clamping part is movably connected to the transmission part.

[0010] The transmission unit includes: a housing, a transmission mechanism, and a limiting mechanism; the transmission mechanism and the limiting mechanism are installed inside the housing; the transmission mechanism is a U-shaped transmission mechanism, and the limiting mechanism is disposed inside the cavity of the U-shaped structure;

[0011] When the transmission mechanism performs a transmission action, the top end of the limiting mechanism abuts against the transmission mechanism, and the limiting mechanism restricts the clamping position of the second clamping part, which is in the state of clamping the opening and closing indicator plate; when the transmission mechanism performs a return action, the top end of the limiting mechanism separates from the transmission mechanism, and the clamping position of the second clamping part can move horizontally.

[0012] Preferably, the first clamping part includes: a connector, a disc structure, and a top connector; one side of the disc structure is concave, and the shape of the concave surface matches the outer diameter of the split indicator disc; the connector is disposed on the opposite side of the concave surface; the top connector is disposed directly above the connector and is fixedly connected to the bottom left side of the transmission part.

[0013] Preferably, the transmission mechanism includes: an external button, a driving rod, a connecting rod, a driven rod, and several spring return mechanisms; the limiting mechanism includes: a push rod and a limiting member;

[0014] The external button is located on the left side of the transmission unit; one side of the driving rod is connected to the external button via a first spring return mechanism, and the other side is connected to the top of the connecting rod, with a protrusion in the middle of the driving rod; the middle of the connecting rod is fixed by a pivot, and its bottom is connected to one side of the driven rod; the other side of the driven rod is connected to a second spring return mechanism, and a pressing member is provided in the middle of the driven rod; the driving rod, the connecting rod, and the driven rod form a U-shaped structure;

[0015] The push rod is installed between the driving rod and the driven rod; the limiting member is located directly below the pressing member; when the external button is pressed, the driving rod moves to the right, the driven rod moves to the left, and the protrusion abuts against the upper part of the push rod, generating a pressing effect; the push rod causes the pressing member and the limiting member to move downward.

[0016] Preferably, the second clamping part includes: an arc-shaped connector, a positioning component, and a fastening connector;

[0017] The upper part of the fastening connector is arc-shaped, and its outer diameter is adapted to the inner diameter of the concave surface of the disc structure; the positioning component is located on the right side of the fastening connector; the arc-shaped connector is located directly above the positioning component, and the guide at its top is connected to the transmission part;

[0018] The fastening connector is bonded to the positioning component; the arc connector is fixedly connected to the positioning component by screws.

[0019] Preferably, the positioning component has a cavity structure inside, and the cavity structure is provided with a third spring return mechanism, a positioning post, a limiting block, a top post, and a lower pressure plate; there are two positioning posts, which are set at the bottom of the cavity structure; a limiting block is set at the top of the positioning post; the third spring return mechanism is sleeved on the positioning post; the bottom of the top post and the lower pressure plate are integrally formed; the lower pressure plate has two through holes and is sleeved on the positioning post, and the lower pressure plate is located between the third spring return mechanism and the limiting block;

[0020] When performing the transmission action, the top of the top column abuts against the limiting member, causing the second clamping part to move to clamp the opening / closing indicator plate and achieve the limiting action; when performing the return action, the top of the top column separates from the limiting member, allowing the second clamping part to move horizontally.

[0021] Preferably, the fastening connector is a rubber gasket.

[0022] Preferably, the limiting component includes: a limiting plate, limiting posts, and a fourth spring return mechanism; the limiting posts are provided in two or more, equally spaced at the bottom of the limiting plate and are integrally formed; the fourth spring return mechanism is sleeved on the limiting posts on both sides.

[0023] Preferably, the clamping fixture is further provided with a fifth spring return mechanism, which is located at the end of the guide member.

[0024] Preferably, the push rod includes: a trapezoidal platform, a connecting rod, a sixth spring return mechanism, and a pressing platform; the trapezoidal platform is disposed at the top of the connecting rod, the pressing platform is disposed at the bottom of the connecting rod, and the sixth spring return mechanism is sleeved on the connecting rod and located between the pressing platform and the trapezoidal platform.

[0025] Preferably, the bottom of the connecting rod has a stepped irregular structure.

[0026] Compared with the prior art, the advantages of this utility model are as follows: 1. The clamping fixture for mechanical characteristic testing has a simple overall structure and small size; 2. The first clamping part is positioned on the split indicator plate. Pressing the external button moves the second clamping part to clamp the split indicator plate, so that the rotation speed sensor is firmly connected to the split indicator plate and the installation position is accurate, thereby ensuring the accuracy of the measurement results; 3. After the test is completed, simply pressing the external button again can realize the convenient disassembly of the clamping fixture. The clamping and disassembly process does not cause any damage to the split indicator plate. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram of the structure of a clamping fixture for testing mechanical properties provided by this utility model;

[0029] Figure 2 An exploded view of the structure of a clamping fixture for testing mechanical properties provided by this utility model;

[0030] Figure 3 A partial sectional view of the transmission part of a clamping fixture for testing mechanical properties provided by this utility model;

[0031] Figure 4 A partial cross-sectional view of the second clamping part of a clamping fixture for testing mechanical properties provided by this utility model;

[0032] Figure 5 A schematic diagram of the outer shell structure of a clamping fixture for testing mechanical properties provided by this utility model;

[0033] Figure 6 A partial sectional view of the position of the limiting component of a clamping fixture for testing mechanical properties provided by this utility model;

[0034] Figure 7A schematic diagram of a disc structure for a clamping fixture used for testing mechanical properties provided by this utility model. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0036] The directional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inside," "outside," and "side," are merely for reference to the accompanying drawings. Therefore, the directional terms used are for the purpose of explaining and understanding this utility model, and not for limiting this utility model.

[0037] See Figures 1 to 7 This utility model provides a clamping fixture for testing mechanical characteristics, applied to the auxiliary testing of power equipment with operating mechanisms; wherein, the power equipment includes, but is not limited to, high and low voltage equipment such as ring main units, ring main boxes, and prefabricated substations. The clamping fixture includes: a first clamping part 1, a second clamping part 2, and a transmission part 3; the operating mechanism is provided with a disengagement indicator, one side of the first clamping part 1 is disposed on the outer side of the disengagement indicator, and the other side is connected to a rotary speed sensor for testing mechanical characteristics; the top of the first clamping part 1 is fixedly connected to the bottom left side of the transmission part 3; the second clamping part 2 is located on the inner side of the disengagement indicator; a guide rail 311 is provided at the bottom center of the transmission part 3, and a guide member 211 is provided at the top of the second clamping part 2, the guide rail 311 and the guide member 211 are adapted to each other, and the second clamping part 2 is movably connected to the transmission part 3.

[0038] See Figure 1 , Figure 2 The first clamping part 1 includes: a connector 11, a disc structure 12, and a top connector 13; see also Figure 7 One side of the disc structure 12 is a concave surface 121, the shape of which matches the outer diameter of the split indicator disc; the connector 11 is disposed on the opposite side of the concave surface 121; a connecting hole is provided in the middle of the connector 11 to connect with the rotation speed sensor, preferably a threaded hole; the top connector 13 is disposed directly above the connector 11 and is fixedly connected to the bottom left side of the transmission part 3 with screws.

[0039] See Figures 1-3The transmission unit 3 includes: a housing 31, a transmission mechanism, and a limiting mechanism; the transmission mechanism and the limiting mechanism are installed inside the housing; the transmission mechanism is a U-shaped transmission mechanism, and the limiting mechanism is disposed within the cavity of the U-shaped structure. The housing 31 is divided into a bottom shell 312 and an outer shell 313, both made of metal or composite materials. See also... Figure 5 The outer shell 313 adopts a foolproof design and is directly installed on the bottom shell 312 according to the inlay strip and cylinder of the outer shell 313; four through holes are opened on the outside of the outer shell 31, and the bottom shell 312 and the outer shell 313 are fastened by four screws.

[0040] When the transmission mechanism performs the transmission action, the top end of the limiting mechanism abuts against the transmission mechanism, and the limiting mechanism restricts the clamping position of the second clamping part 2, which is in the state of clamping the opening and closing indicator plate; when the transmission mechanism performs the return action, the top end of the limiting mechanism separates from the transmission mechanism, and the clamping position of the second clamping part 2 can move horizontally.

[0041] In this embodiment, the transmission mechanism includes: an external button 32, a driving rod 33, a connecting rod 34, a driven rod 35, and several spring return mechanisms. All spring return mechanisms involved in this embodiment are existing technologies, achieving the return effect through springs and other components, and will not be described further here. The limiting mechanism includes: a downward push rod 36 and a limiting member 37.

[0042] The external button 32 is located on the left side of the transmission part 3; one side of the driving rod 33 is connected to the external button 32 via a first spring return mechanism 321, and the other side is connected to the top of the connecting rod 34, with a protrusion in the middle of the driving rod 33; the middle of the connecting rod 34 is fixed by a rotating shaft, and the bottom is connected to one side of the driven rod 35; the middle of the connecting rod 34 is a hollow cylinder, with a torsion spring 341 sleeved inside; a circular hole of a certain depth is opened above the rotating shaft at the position of the bottom shell 312 for installing one side of the torsion spring 341; the other side of the torsion spring 341 is sleeved on the top of the connecting rod 34 to provide torque to the connecting rod 34; the other side of the driven rod 35 is connected to a second spring return mechanism 351, and a pressing member 352 is provided in the middle of the driven rod 35; the driving rod 33, the connecting rod 34, and the driven rod 35 form a U-shaped structure;

[0043] The push rod 36 is installed between the driving rod 33 and the driven rod 35; the limiting member 37 is located directly below the pressing member 352; when the external button 32 is pressed, the driving rod 33 moves to the right, the driven rod 35 moves to the left, and the protrusion abuts against the upper part of the push rod 36, generating a downward pressing effect; the push rod 36 causes the pressing member 352 and the limiting member 37 to move downward.

[0044] See Figure 1 , Figure 2 and Figure 4 The second clamping part 2 includes: an arc-shaped connector 21, a positioning component 22, and a fastening connector 23; the upper part of the fastening connector 23 is arc-shaped, and its outer diameter is adapted to the inner diameter of the disc structure; the positioning component 22 is located to the right of the fastening connector 23; the arc-shaped connector 21 is located directly above the positioning component 22, and its top guide 211 is connected to the transmission part 3. The fastening connector 23 is bonded to the positioning component 22; the arc-shaped connector 21 and the positioning component 22 are fixedly connected by screws.

[0045] Referring to this embodiment, the positioning component 22 has a cavity structure inside, and the cavity structure is provided with a third spring return mechanism 220, a positioning post 221, a limiting block 222, a top post 223, and a lower pressure plate 224; there are two positioning posts 221, which are set at the bottom of the cavity structure; the top of the positioning post 221 is provided with a limiting block 222; the third spring return mechanism 220 is sleeved on the positioning post 221; the bottom of the top post 223 and the lower pressure plate 224 are integrally formed; the lower pressure plate 224 has two through holes and is sleeved on the positioning post 221, and the lower pressure plate 224 is located between the third spring return mechanism 220 and the limiting block 222. When performing the transmission action, the top of the top post 223 abuts against the limiting member 37, causing the second clamping part 2 to move to clamp the opening and closing indicator plate and achieve the limiting action; when performing the return action, the top of the top post 223 separates from the limiting member 37, allowing the second clamping part 2 to move horizontally.

[0046] Referring to this embodiment, the fastening connector 23 is preferably a rubber pad to increase the friction with the split indicator, so that the split indicator and the clamping fixture will not move relative to each other during the mechanical test.

[0047] Referring to this embodiment, the limiting member 37 includes: a limiting plate 371, limiting posts 372, and a fourth spring return mechanism 373, preferably a compression spring; the limiting posts 372 are provided in two or more, equally spaced at the bottom of the limiting plate 371, and are an integrally formed structure. In this embodiment, it is preferred that there are four limiting posts 372. Through holes are provided at the positions of the limiting posts 372 to limit the vertical movement space of the limiting posts 372; the fourth spring return mechanism 373 is sleeved on the limiting posts 372 on both sides; the diameter of the through holes on both sides of the limiting posts 372 is increased downwards from the uppermost position to accommodate the fourth spring return mechanism 373.

[0048] SeeFigure 2 The clamping fixture is also provided with a fifth spring return mechanism 212, which is located at the end of the guide member 211. The fifth spring return mechanism 212 is preferably a tension spring. When assembling the transmission part 3 and the second clamping part 2, the other side of the fifth spring return mechanism 212 is installed on the mounting groove wall on the right side of the guide rail.

[0049] Referring to this embodiment, the push rod 36 includes: a trapezoidal platform 361, a connecting rod 362, a sixth spring return mechanism 363, and a pressing platform 364; the trapezoidal platform 361 is disposed at the top of the connecting rod 362, and the pressing platform 363 is disposed at the bottom of the connecting rod 362; the sixth spring return mechanism 363 is sleeved on the connecting rod 362, located between the trapezoidal platform 361 and the pressing platform 364, to add an auxiliary return function to the push rod 36.

[0050] Referring to this embodiment, the bottom of the connecting rod 34 has a stepped irregular structure, which facilitates the horizontal movement of the driven rod 35.

[0051] This embodiment provides a detailed explanation of the clamping fixture's operation process using a specific example. For instance, when it is necessary to adjust the position of the second clamping part 2 to clamp the opening / closing indicator, simply press the external button 32, then manually move the second clamping part 2 to clamp the opening / closing indicator, and then release the external button 32. During this process, the internal movement of the clamping fixture's transmission part is as follows: the driving rod 33 pushes the connecting rod 34 to the right to rotate counterclockwise, the driven rod 35 moves to the left, and simultaneously the protrusion abuts against the trapezoidal platform 361 of the lower push rod 36, causing the lower push rod 36 to move downwards. The lower pressing platform 364 pushes the lower pressing member 352 to abut against the limiting member 37 and move downwards. The second spring return mechanism 351, the fourth spring return mechanism 373, and the sixth spring return mechanism 363 push the driven rod 35 to the right, and the limiting member 37 and the lower push rod 36 to return to their original positions. The top post 223 moves upward into the through hole of the limiting post 372, and the second clamping part 2 and the opening / closing indicator plate are clamped together. At this time, the required parameters can be tested using a mechanical characteristic testing device through a rotation speed sensor. After the test is completed, the disassembly process of the clamping fixture is as follows: Press the external button 32, the second clamping part 2 and the opening / closing indicator plate are released, and it can be disassembled; at this time, the internal movement of the clamping fixture is as follows: the driving rod 33 pushes the connecting rod 34 to the right to rotate counterclockwise, the driven rod 35 moves to the left, and at the same time the protrusion abuts against the trapezoidal platform 361 of the lower push rod 36, the lower push rod 36 moves downward, the lower pressing platform 364 pushes the lower pressing part 352 to abut against the limiting part 37 and move downward, the top post 223 is pushed out of the through hole of the limiting post 372, the fifth spring return mechanism 212 drives the second clamping part 2 to move horizontally to the left, the second clamping part 2 can move horizontally, thereby achieving easy disassembly.

[0052] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0053] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Since these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

[0054] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A clamping fixture for testing mechanical characteristics, applied to auxiliary testing of power equipment with an operating mechanism; characterized in that, The clamping fixture includes a first clamping part, a second clamping part, and a transmission part; the operating mechanism is provided with a split-opening indicator disk, one side of the first clamping part is disposed on the outer side of the split-opening indicator disk, and the other side is connected to a rotary speed sensor for mechanical characteristic testing; the top of the first clamping part is fixedly connected to the bottom left side of the transmission part; the second clamping part is located on the inner side of the split-opening indicator disk; a guide rail is provided at the bottom middle of the transmission part, and a guide member is provided at the top of the second clamping part, the guide rail and the guide member are adapted to each other, and the second clamping part is movably connected to the transmission part; The transmission unit includes: a housing, a transmission mechanism, and a limiting mechanism; the transmission mechanism and the limiting mechanism are installed inside the housing; the transmission mechanism is a U-shaped transmission mechanism, and the limiting mechanism is disposed inside the cavity of the U-shaped transmission mechanism; When the transmission mechanism performs a transmission action, the top end of the limiting mechanism abuts against the transmission mechanism, and the limiting mechanism restricts the clamping position of the second clamping part, which is in the state of clamping the opening and closing indicator plate; when the transmission mechanism performs a return action, the top end of the limiting mechanism separates from the transmission mechanism, and the clamping position of the second clamping part can move horizontally.

2. The clamping fixture for testing mechanical properties according to claim 1, characterized in that, The first clamping part includes: a connector, a disc structure, and a top connector; one side of the disc structure is concave, and its concave shape matches the outer diameter of the split indicator disc; the connector is disposed on the opposite side of the concave surface; the top connector is disposed directly above the connector and is fixedly connected to the bottom left side of the transmission part.

3. The clamping fixture for testing mechanical properties according to claim 2, characterized in that, The transmission mechanism includes: an external button, a driving rod, a connecting rod, a driven rod, and several spring return mechanisms; the limiting mechanism includes: a push rod and a limiting component; The external button is located on the left side of the transmission unit; one side of the driving rod is connected to the external button via a first spring return mechanism, and the other side is connected to the top of the connecting rod, with a protrusion in the middle of the driving rod; the middle of the connecting rod is fixed by a pivot, and its bottom is connected to one side of the driven rod; the other side of the driven rod is connected to a second spring return mechanism, and a pressing member is provided in the middle of the driven rod; the driving rod, the connecting rod, and the driven rod constitute a U-shaped transmission mechanism; The push rod is installed between the driving rod and the driven rod; the limiting member is located directly below the pressing member; when the external button is pressed, the driving rod moves to the right, the driven rod moves to the left, the protrusion abuts against the upper part of the push rod, and a pressing action is generated; the push rod causes the pressing member and the limiting member to move downward.

4. The clamping fixture for testing mechanical properties according to claim 3, characterized in that, The second clamping part includes: an arc-shaped connector, a positioning component, and a fastening connector; The upper part of the fastening connector is arc-shaped, and its outer diameter is adapted to the inner diameter of the concave surface of the disc structure; the positioning component is located on the right side of the fastening connector; the arc-shaped connector is located directly above the positioning component, and the guide at its top is connected to the transmission part; The fastening connector is bonded to the positioning component; the arc connector is fixedly connected to the positioning component by screws.

5. The clamping fixture for testing mechanical properties according to claim 4, characterized in that, The positioning component has a cavity structure inside, which houses a third spring return mechanism, positioning posts, a limiting block, a top post, and a lower pressure plate. Two positioning posts are located at the bottom of the cavity structure. A limiting block is located at the top of each positioning post. The third spring return mechanism is sleeved on the positioning posts. The bottom of the top post and the lower pressure plate are integrally formed. The lower pressure plate has two through holes and is sleeved on the positioning posts, positioned between the third spring return mechanism and the limiting block. When performing the transmission action, the top of the top column abuts against the limiting member, causing the second clamping part to move to clamp the opening / closing indicator plate and achieve the limiting action; when performing the return action, the top of the top column separates from the limiting member, allowing the second clamping part to move horizontally.

6. The clamping fixture for testing mechanical properties according to claim 4, characterized in that, The fastening connector is a rubber gasket.

7. The clamping fixture for testing mechanical properties according to claim 3, characterized in that, The limiting component includes: a limiting plate, limiting posts, and a fourth spring return mechanism; the limiting posts are provided in two or more, equally spaced at the bottom of the limiting plate and are integrally formed; the fourth spring return mechanism is sleeved on the limiting posts on both sides.

8. The clamping fixture for testing mechanical properties according to claim 3, characterized in that, The clamping fixture is also equipped with a fifth spring return mechanism, which is located at the end of the guide member.

9. The clamping fixture for testing mechanical properties according to claim 3, characterized in that, The push rod includes a trapezoidal platform, a connecting rod, a sixth spring return mechanism, and a pressing platform; the trapezoidal platform is located at the top of the connecting rod, the pressing platform is located at the bottom of the connecting rod, and the sixth spring return mechanism is sleeved on the connecting rod and located between the pressing platform and the trapezoidal platform.

10. The clamping fixture for testing mechanical properties according to claim 3, characterized in that, The bottom of the connecting rod has a stepped irregular structure.

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