Material supporting and clamping mechanism

Abstract

A material supporting and clamping mechanism comprises a ground rail support, a material supporting assembly, a clamping assembly, an auxiliary bending assembly, a first driving device and a second driving device. The material supporting assembly and the auxiliary bending assembly are installed on the ground rail support in a left-right moving mode, the material supporting assembly is used for supporting a workpiece, and the auxiliary bending assembly is used for clamping and fixing the vertically-bent area of the workpiece. The clamping assembly is installed on the ground rail support and located between the material supporting assembly and the auxiliary bending assembly, and the clamping assembly is used for clamping and fixing a workpiece. The utility model provides the material supporting and clamping mechanism according to the content, and solves the problems that the clamping mechanism in the prior art only clamps and fixes the middle area of a wire row workpiece and does not additionally clamp and fix the processing and bending area, especially the step of twisting after vertical bending, the twisting force is dispersed in the twisting and bending process, and the bending quality is influenced. And therefore, the bending deformation quantity does not meet the production requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile wire arrangement processing, in particular to a material supporting and clamping mechanism. Background Art

[0002] Automotive wiring harnesses, also known as wiring harnesses or cable arrangements, are a collection of wires used to connect various electronic devices, sensors, actuators, and other components within a vehicle. These harnesses are responsible for transmitting various electrical signals, including control signals, data signals, and power supply, ensuring proper communication and operation between various systems within the vehicle. During assembly, the harnesses are often clamped and secured with a clamping mechanism before being bent, such as vertically, twisted, or flat.

[0003] However, the clamping mechanism in the prior art usually only clamps and fixes the middle area of ​​the workpiece, and does not perform additional clamping and fixing on the processing bending area, especially the twisting step after the vertical bending. The torque will be dispersed during the twisting process, resulting in the bending deformation not meeting the production requirements. Utility Model Content

[0004] The purpose of the present utility model is to propose a material support clamping mechanism to solve the problem that the clamping mechanism in the prior art usually only clamps and fixes the middle area of ​​the workpiece, and does not perform additional clamping and fixation on the processing bending area, especially the twisting step after the vertical bending. The torque will be dispersed during the twisting process, resulting in the problem that the bending deformation does not meet the production requirements.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A material supporting and clamping mechanism comprises a ground rail bracket, a material supporting assembly, a clamping assembly, an auxiliary bending assembly, a first driving device and a second driving device;

[0007] The supporting assembly and the auxiliary bending assembly are respectively movably mounted on the ground rail bracket, the supporting assembly is used to support the workpiece, and the auxiliary bending assembly is used to clamp and fix the area of ​​the workpiece after vertical bending;

[0008] The clamping assembly is installed on the ground rail bracket, and the clamping assembly is located between the supporting assembly and the auxiliary bending assembly. The clamping assembly is used to clamp and fix the workpiece. The first driving device is used to drive the supporting assembly to move left and right, and the second driving device is used to drive the auxiliary bending assembly to move left and right.

[0009] Furthermore, it also includes a first movable seat, a first column, a first driving part, a second movable seat, a first mounting seat and a first supporting wheel;

[0010] The first movable seat is mounted on the ground rail bracket so as to be movable left and right, the first column is mounted on the top surface of the first movable seat, the second movable seat is mounted on the first column so as to be movable up and down, and the first driving part is used to drive the second movable seat to move up and down;

[0011] The first mounting seat and the auxiliary bending assembly are respectively installed on the top of the second movable seat. The first mounting seat is located on the right side of the auxiliary bending assembly. The first supporting wheel is rotatably installed on the first mounting seat.

[0012] Specifically, the first supporting wheel is provided with a first guide groove.

[0013] Preferably, the first column is provided with a guide block, and the second movable seat is provided with a guide bar, and the guide bar is slidably mounted on the guide block.

[0014] In some embodiments, the auxiliary bending assembly includes a second mounting seat, a second driving portion, a first clamping block, a lifting seat, a rotating member, a first opening and closing block, and an opening and closing shaft;

[0015] The second mounting base is mounted on the top surface of the second movable base, the lifting base is mounted inside the second mounting base and can be moved up and down, the front and rear ends of the lifting base are respectively mounted with the rotating members, and the second driving part is used to drive the lifting base to move up and down;

[0016] The opening and closing shaft is installed on the second mounting seat, and one end of the two first opening and closing blocks can be swingably installed on the opening and closing shaft, and the first clamping blocks are respectively installed on the inner sides of the other ends of the two first opening and closing blocks. The two first clamping blocks are arranged opposite to each other, and the outer sides of the two first opening and closing blocks are respectively provided with inclined surfaces and blocking blocks, and the blocking blocks are located below the inclined surfaces. The rotating member can abut against the inclined surfaces, and the rotating member can abut against the blocking blocks.

[0017] Furthermore, the support assembly includes a third movable seat, a second column, a third driving portion, a third mounting seat and a second supporting wheel;

[0018] The third movable seat can be installed on the ground rail bracket for movement left and right, one end of the second column is installed on the top surface of the third movable seat, the other end of the second column is installed with the third driving part, the output end of the third driving part is installed with the third mounting seat, the third driving part is used to drive the third mounting seat to move up and down, the second support wheel can be rotatably installed on the third mounting seat, and the second support wheel is used to support the workpiece.

[0019] Specifically, the clamping assembly includes a fixing seat, a fourth driving portion, a first hinge bar, a second hinge bar, a third hinge bar, a hinge block, a fixing block and a second clamping block;

[0020] The fixing seat is mounted on the floor rail bracket, the fourth driving unit is hinged inside the fixing seat, one end of the second hinge bar is mounted on the output end of the fourth driving unit, one end of the first hinge bar is hinged inside the fixing seat, the other end of the first hinge bar is hinged to one end of the second hinge bar and one end of the third hinge bar respectively, and the other end of the third hinge bar is hinged to the hinge block;

[0021] The fixing block is fixedly mounted on the fixing seat, the hinge block is hinged to the fixing block, and the second clamping blocks are respectively mounted on inner sides of the hinge block and the fixing block.

[0022] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0023] Through the ground rail bracket, the supporting assembly, the clamping assembly, the auxiliary bending assembly, the first drive device and the second drive device, the clamping assembly always clamps and fixes the middle part of the workpiece to prevent the workpiece from moving and deviating during the processing and affecting the production quality. The supporting assembly always supports the right end of the workpiece to prevent the right end of the workpiece from bending and deforming in the air. Furthermore, the auxiliary bending assembly is used to clamp and fix the area after the vertical bending to ensure the processing accuracy and processing stability of the subsequent twisting and bending process, so that the deformation of the workpiece meets the process requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of a material holding mechanism according to one embodiment of the present invention;

[0025] Figure 2 yes Figure 1 A magnified view of point A;

[0026] Figure 3 yes Figure 1 An enlarged view of point B;

[0027] Figure 4 This is a schematic structural diagram of a clamping assembly in one embodiment of the present invention;

[0028] Figure 5 This is a schematic structural diagram of an auxiliary bending assembly according to one embodiment of the present invention;

[0029] Figure 6 This is a schematic structural diagram of a cross-sectional view of an auxiliary bending assembly in one embodiment of the present utility model;

[0030] Among them: ground rail bracket 1, supporting assembly 2, third movable seat 21, second column 22, third driving part 23, third mounting seat 24, second support wheel 25, clamping assembly 3, fixed seat 31, fourth driving part 32, first hinge bar 33, second hinge bar 34, third hinge bar 35, hinge block 36, fixed block 37, second clamping block 38, auxiliary bending assembly 4, second mounting seat 41, second driving part 42, first clamping block 43, lifting seat 44, rotating member 45, first opening and closing block 46, inclined surface 461, blocking block 462, opening and closing axis 47, first driving device 5, second driving device 6, first movable seat 71, first column 72, guide block 721, first driving part 73, second movable seat 74, guide bar 741, first mounting seat 75, first support wheel 76, first guide groove 761. DETAILED DESCRIPTION

[0031] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", "inner end", "outer end", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more such features, and are used to distinguish and describe features, without distinction of order or importance. In the description of the present invention, unless otherwise specified, "multiple" means more than two.

[0033] In one embodiment of the present invention, Figure 1-6As shown, a material supporting and clamping mechanism includes a ground rail bracket 1, a material supporting assembly 2, a clamping assembly 3, an auxiliary bending assembly 4, a first driving device 5 and a second driving device 6; the material supporting assembly 2 and the auxiliary bending assembly 4 can be respectively installed on the ground rail bracket 1 for movement left and right, the material supporting assembly 2 is used to support the workpiece, and the auxiliary bending assembly 4 is used to clamp and fix the area of ​​the workpiece after vertical bending; the clamping assembly 3 is installed on the ground rail bracket 1, the clamping assembly 3 is located between the material supporting assembly 2 and the auxiliary bending assembly 4, the clamping assembly 3 is used to clamp and fix the workpiece, the first driving device 5 is used to drive the material supporting assembly 2 to move left and right, and the second driving device 6 is used to drive the auxiliary bending assembly 4 to move left and right. In this embodiment, the clamping assembly 3 is installed in the middle of the top surface of the ground rail bracket 1, the supporting assembly 2 can be moved left and right and installed at the right end of the ground rail bracket 1, and the auxiliary bending assembly 4 can be moved left and right and installed at the left end of the ground rail bracket 1. It should be noted that the right side of the supporting assembly 2 and the left side of the auxiliary bending assembly 4 are both provided with a vertical bending mechanism, and the rear side of the ground rail bracket 1 is provided with a bending manipulator. When working, the front process transports the workpiece (aluminum wire row) to the front side of the ground rail bracket 1, and at the same time, the first driving device 5 drives the The support assembly 2 moves left and right, and the second driving device 6 drives the auxiliary bending assembly 4 to move left and right, so that the two move to the set position, and then the bending robot clamps the workpiece and places it on the support assembly 2, the clamping assembly 3 and the auxiliary bending assembly 4, and adjusts the position of the workpiece in the left and right directions. After the position is adjusted, the clamping assembly 3 clamps and fixes the middle of the workpiece to prevent the workpiece from moving during the processing. The support assembly 2 holds up the right end of the workpiece to keep it flat and balanced, and the vertical bending mechanism on the left side of the auxiliary bending assembly 4 performs The workpiece is bent vertically (i.e., the workpiece is placed vertically and bent at a set angle). After the bending is completed, the bending area at the left end of the workpiece is aligned with the clamping inner cavity of the auxiliary bending component. Then the clamping component 3 releases the workpiece, and the bending manipulator clamps the workpiece and moves left and right so that the bending area of ​​the workpiece is aligned with the clamping inner cavity of the auxiliary bending component 4. Then the auxiliary bending component 4 clamps and fixes the area of ​​the workpiece after bending, and the clamping component 3 clamps the middle of the workpiece. After the two clamp and fix the workpiece, the bending manipulator moves the left side of the bending area according to production needs. Twisting; the present application uses the ground rail bracket 1, the supporting assembly 2, the clamping assembly 3, the auxiliary bending assembly 4, the first drive device 5 and the second drive device 6, so that the clamping assembly 3 always clamps and fixes the middle part of the workpiece to prevent the workpiece from moving and deviating during the processing and affecting the production quality, and the supporting assembly 2 always supports the right end of the workpiece to prevent the right end of the workpiece from being bent and deformed in the air. Furthermore, the auxiliary bending assembly 4 is used to clamp and fix the area after the vertical bending to ensure the processing accuracy and processing stability of the subsequent twisting and bending process, so that the deformation of the workpiece meets the process requirements.

[0034] like Figure 1-2 As shown, it also includes a first movable seat 71, a first column 72, a first driving part 73, a second movable seat 74, a first mounting seat 75 and a first supporting wheel 76; the first movable seat 71 can be moved left and right and mounted on the ground rail bracket 1, the first column 72 is mounted on the top surface of the first movable seat 71, the second movable seat 74 can be moved up and down and mounted on the first column 72, and the first driving part 73 is used to drive the second movable seat 74 to move up and down; the first mounting seat 75 and the auxiliary bending component 4 are respectively mounted on the top of the second movable seat 74, the first mounting seat 75 is located on the right side of the auxiliary bending component 4, and the first supporting wheel 76 can be rotatably mounted on the first mounting seat 75. In this embodiment, the first support wheel 76 is mounted on the first mounting seat 75. The workpiece can be placed in the inner groove of the first support wheel 76. The first support wheel 76 not only supports the workpiece, but also rotates when the workpiece is moved left and right to ensure smooth movement and reduce friction. Furthermore, the first driving unit 73 is a cylinder. The first driving unit 73 is mounted on the first column 72. The output end of the first driving unit 73 is connected to the second movable seat 74. When the height position of the auxiliary bending assembly 4 and the first support wheel 76 needs to be adjusted, the second movable seat 74 can be moved up and down by retracting the output shaft of the first driving unit 73, so that the vertical bending area of ​​the workpiece can be matched with the auxiliary bending assembly 4. It should be noted that the first driving device 5 is a motor gear rack structure. The first movable seat 71 is equipped with a motor. The output end of the motor is equipped with a gear. The gear meshes with the rack mounted on the top surface of the ground rail bracket 1. When the motor drives the gear at its output end to rotate, the first movable seat 71 can drive the auxiliary bending assembly 4 to move left and right.

[0035] like Figure 2 As shown, the first support wheel 76 is provided with a first guide groove 761. In this embodiment, the first guide groove 761 is provided inside the first support wheel 76, and a workpiece is placed in the first guide groove 761. When the workpiece moves left and right, the first guide groove 761 plays a guiding role, which can prevent the workpiece from moving out of position.

[0036] like Figure 2 As shown, the first column 72 is provided with a guide block 721, and the second movable seat 74 is provided with a guide bar 741, and the guide bar 741 is slidably mounted on the guide block 721. In this embodiment, the number of the guide blocks 721 is four, and the number of the guide bars 741 is two, and each guide bar 741 is slidably mounted on two guide blocks 721, thereby ensuring the guiding performance while improving the movement smoothness of the second movable seat 74.

[0037] like Figure 5-6 As shown, the auxiliary bending assembly 4 includes a second mounting seat 41, a second driving portion 42, a first clamping block 43, a lifting seat 44, a rotating member 45, a first opening and closing block 46 and an opening and closing shaft 47; the second mounting seat 41 is mounted on the top surface of the second movable seat 74, the lifting seat 4 can be moved up and down and mounted inside the second mounting seat 41, the front and rear ends of the lifting seat 4 are respectively equipped with the rotating member 45, the second driving portion 42 is used to drive the lifting seat 4 to move up and down; the opening and closing shaft 47 is mounted on the The second mounting seat 41, one end of the two first opening and closing blocks 46 can be swingably mounted on the opening and closing shaft 47, and the first clamping blocks 43 are respectively installed on the inner side of the other end of the two first opening and closing blocks 46. The two first clamping blocks 43 are arranged opposite to each other, and the outer sides of the two first opening and closing blocks 46 are respectively provided with an inclined surface 461 and a blocking block 462, and the blocking block 462 is located below the inclined surface 461. The rotating member 46 can abut against the inclined surface 461, and the rotating member 46 can abut against the blocking block 462. In this embodiment, the middle part of the lifting seat 44 is provided with an air avoidance area, the first opening and closing block 46 and the opening and closing shaft 47 are located in the air avoidance area, the interior of the second mounting seat 41 is a hollow structure, the second driving part 42 is a cylinder, the second driving part 42 is installed on the second moving seat 74, the output end of the second driving part 42 is connected to the lifting seat 44, the rotating part 45 is a rolling bearing, the two inclined surfaces 461 together form an inverted eight-shaped structure, the inner sides of the two first clamping blocks 43 are provided with corresponding vertical bending-shaped inner cavities, and when working, the second driving part 42 drives the lifting seat 44. The seat 44 drives the two rotating parts 45 to move downward until the rotating parts 45 abut against the blocking block 462, then one end of the two first opening and closing blocks 46 swings along the opening and closing axis 47, and the two first clamping blocks 43 at the other end of the two first opening and closing blocks 46 move away from each other, thereby achieving the purpose of loosening the workpiece; conversely, when the two rotating wheels 45 move upward, the two rotating parts 45 abut against the corresponding inclined surfaces 461, and under the action of the inclined surfaces 461, the two first clamping blocks 43 at the other end of the two first opening and closing blocks 46 move close to each other, thereby achieving the purpose of clamping the workpiece, and opening and closing are convenient and quick.

[0038] like Figure 1 and Figure 3As shown, the material supporting assembly 2 includes a third movable seat 21, a second column 22, a third driving part 23, a third mounting seat 24 and a second supporting wheel 25; the third movable seat 21 can be moved left and right and installed on the ground rail bracket 1, one end of the second column 22 is installed on the top surface of the third movable seat 21, the other end of the second column 22 is installed with the third driving part 23, the output end of the third driving part 23 is installed with the third mounting seat 24, the third driving part 23 is used to drive the third mounting seat 24 to move up and down, the second supporting wheel 25 can be rotatably installed on the third mounting seat 24, and the second supporting wheel 25 is used to support the workpiece. In this embodiment, the second support wheel 25 and the first support wheel 76 have the same structure, and the third driving part 23 is a cylinder. When working, the output shaft of the third driving part 23 is extended and retracted, so that the third mounting seat 24 can drive the second support wheel 25 to move up and down, so that the workpiece and the second support wheel 25 are more adapted to each other, so as to ensure the straightness and balance of the workpiece. It should be noted that the second driving device 8 is a motor gear rack structure, and the third movable seat 21 is equipped with a motor, and a gear is installed at the output end of the motor. The gear is engaged with the rack installed on the top surface of the ground rail bracket 1. When the motor drives the gear at its output end to rotate, the third movable seat 21 can be moved left and right.

[0039] like Figure 1 and Figure 4As shown, the clamping assembly 3 includes a fixed seat 31, a fourth driving part 32, a first hinge bar 33, a second hinge bar 34, a third hinge bar 35, a hinge block 36, a fixed block 37 and a second clamping block 38; the fixed seat 31 is installed on the ground rail bracket 1, the fourth driving part 32 is hinged to the inside of the fixed seat 31, the output end of the fourth driving part 32 is installed with one end of the second hinge bar 34, one end of the first hinge bar 33 is hinged to the inside of the fixed seat 31, the other end of the first hinge bar 33 is hinged to one end of the second hinge bar 34 and one end of the third hinge bar 35 respectively, and the other end of the third hinge bar 35 is hinged to the hinge block 36; the fixed block 37 is fixedly installed on the fixed seat 31, the hinge block 36 is hinged to the fixed block 37, and the second clamping block 38 is respectively installed on the inner sides of the hinge block 36 and the fixed block 37. In this embodiment, the fourth driving part 32 is a cylinder, and the fourth driving part 32, the first hinge bar 33, the second hinge bar 34 and the third hinge bar 35 are respectively arranged inside the fixed seat 31, and the inner side of the second clamping block 38 is provided with a flat structure inner cavity. During operation, the output shaft of the fourth driving part 32 is extended and retracted, and the connecting rod structure composed of the first hinge bar 33, the second hinge bar 34 and the third hinge bar 35 makes the hinge block 36 swing open and close along the hinge with the fixed block 37, so that the two second clamping blocks 38 are close to or away from each other, thereby achieving the purpose of clamping or loosening the workpiece, which is convenient and quick.

[0040] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0041] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A material holding mechanism, characterized in that: It includes a ground rail bracket, a supporting assembly, a clamping assembly, an auxiliary bending assembly, a first driving device and a second driving device; The supporting assembly and the auxiliary bending assembly are respectively movably mounted on the ground rail bracket, the supporting assembly is used to support the workpiece, and the auxiliary bending assembly is used to clamp and fix the area of ​​the workpiece after vertical bending; The clamping assembly is installed on the ground rail bracket, and the clamping assembly is located between the supporting assembly and the auxiliary bending assembly. The clamping assembly is used to clamp and fix the workpiece. The first driving device is used to drive the supporting assembly to move left and right, and the second driving device is used to drive the auxiliary bending assembly to move left and right.

2. A material holding mechanism according to claim 1, characterized in that: It also includes a first movable seat, a first column, a first driving part, a second movable seat, a first mounting seat and a first supporting wheel; The first movable seat is mounted on the ground rail bracket so as to be movable left and right, the first column is mounted on the top surface of the first movable seat, the second movable seat is mounted on the first column so as to be movable up and down, and the first driving part is used to drive the second movable seat to move up and down; The first mounting seat and the auxiliary bending assembly are respectively installed on the top of the second movable seat. The first mounting seat is located on the right side of the auxiliary bending assembly. The first supporting wheel is rotatably installed on the first mounting seat.

3. A material holding mechanism according to claim 2, characterized in that: The first supporting wheel is provided with a first guide groove.

4. A material holding mechanism according to claim 2, characterized in that: The first column is provided with a guide block, and the second movable seat is provided with a guide bar, and the guide bar is slidably mounted on the guide block.

5. The material holding mechanism according to claim 2, characterized in that: The auxiliary bending assembly includes a second mounting seat, a second driving part, a first clamping block, a lifting seat, a rotating member, a first opening and closing block and an opening and closing shaft; The second mounting base is mounted on the top surface of the second movable base, the lifting base is mounted inside the second mounting base and can be moved up and down, the front and rear ends of the lifting base are respectively mounted with the rotating members, and the second driving part is used to drive the lifting base to move up and down; The opening and closing shaft is installed on the second mounting seat, and one end of the two first opening and closing blocks can be swingably installed on the opening and closing shaft, and the first clamping blocks are respectively installed on the inner sides of the other ends of the two first opening and closing blocks. The two first clamping blocks are arranged opposite to each other, and the outer sides of the two first opening and closing blocks are respectively provided with inclined surfaces and blocking blocks, and the blocking blocks are located below the inclined surfaces. The rotating member can abut against the inclined surfaces, and the rotating member can abut against the blocking blocks.

6. The material holding mechanism according to claim 1, characterized in that: The material supporting assembly includes a third movable seat, a second column, a third driving part, a third mounting seat and a second supporting wheel; The third movable seat can be installed on the ground rail bracket for movement left and right, one end of the second column is installed on the top surface of the third movable seat, the other end of the second column is installed with the third driving part, the output end of the third driving part is installed with the third mounting seat, the third driving part is used to drive the third mounting seat to move up and down, the second support wheel can be rotatably installed on the third mounting seat, and the second support wheel is used to support the workpiece.

7. The material holding mechanism according to claim 1, characterized in that: The clamping assembly includes a fixing seat, a fourth driving portion, a first hinge bar, a second hinge bar, a third hinge bar, a hinge block, a fixing block and a second clamping block; The fixing seat is mounted on the floor rail bracket, the fourth driving unit is hinged inside the fixing seat, one end of the second hinge bar is mounted on the output end of the fourth driving unit, one end of the first hinge bar is hinged inside the fixing seat, the other end of the first hinge bar is hinged to one end of the second hinge bar and one end of the third hinge bar respectively, and the other end of the third hinge bar is hinged to the hinge block; The fixing block is fixedly mounted on the fixing seat, the hinge block is hinged to the fixing block, and the second clamping blocks are respectively mounted on inner sides of the hinge block and the fixing block.

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