Clamping mechanism

Abstract

The clamping mechanism comprises a main body support, the upper portion of the main body support is in sliding connection with a clamping mechanism moving front and back, a sliding rail in the left-right direction is arranged in the main body support, clamping mechanisms are in sliding connection in the sliding rail in a bilateral symmetry mode, and the two clamping mechanisms move in opposite directions. And a driving device for driving the clamping mechanisms to slide is arranged between the two clamping mechanisms behind the main body bracket. The clamping device is reasonable in design, the distance between the two clamping bases can be adjusted according to the length requirement of a workpiece, the clamping assembly can effectively clamp the end of the workpiece, the clamping mechanism can effectively clamp and move the workpiece to be machined, manual labor is reduced, and operation is convenient.

Description

Technical Field

[0001] This utility model relates to a clamping mechanism. Background Technology

[0002] Non-standard automated equipment is defined as user-customized, unique, and non-market-circulated automated system integration equipment. It is assembled from unit equipment manufactured according to nationally promulgated unified industry standards and specifications, and is developed, designed, and manufactured based on the customer's specific needs. Different types of customers have different process requirements. A clamping mechanism is a mechanism that holds and manipulates objects. It can clamp and release objects while performing certain actions. Clamping mechanisms have a wide range of applications; different grippers can hold different objects. In some automated workshops or production lines, it is often necessary to clamp cylindrical non-standard parts, which is where clamping mechanisms come in.

[0003] For example, Chinese patent application number CN217345199 discloses a clamping mechanism for non-standard automated equipment, including a base plate. A vertical plate is fixed to one side of the top of the base plate, and a rotating mechanism is provided on one side of the vertical plate. The rotating mechanism includes a support rod fixed to the top of the base plate, and a connecting sleeve is fixed to the top of the support rod. A fixing clamp is provided at the top of one side of the vertical plate, and a second motor is installed at the top of one side of the fixing clamp. Guide structures are fixed to the top of the other side of the fixing clamp. This utility model, by providing a rotating mechanism, allows for the rotation of clamped components when they need to be flipped or adjusted. Starting the first motor causes the output shaft of the first motor to rotate the connecting column, which in turn rotates the fixing clamp, thereby flipping the component held by the fixing clamp. Simultaneously, the support rod and connecting sleeve support the connecting column, and ball bearings improve the lubrication of the rotating column.

[0004] However, the above-mentioned patent has some drawbacks. Clamping excessively long workpieces can easily cause wobbling at both ends, making it inconvenient to clamp excessively long workpieces during the clamping process. The clamping position needs to be manually adjusted during the clamping process, which increases labor costs. Summary of the Invention

[0005] In view of this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a clamping mechanism.

[0006] This utility model is implemented using the following scheme: A clamping mechanism includes a main support, a clamping mechanism that moves back and forth is slidably connected to the upper part of the main support, a left and right slide rail is provided inside the main support, and clamping mechanisms are symmetrically slidably connected to the left and right sides of the slide rail. The two clamping mechanisms move in opposite directions, and a driving device for driving the clamping mechanisms to slide is provided at the rear of the main support between the two clamping mechanisms.

[0007] Furthermore, the clamping mechanism includes a telescopic motor located at the top of the main support. The telescopic end of the telescopic motor faces downward, and a first telescopic rod is connected to the telescopic end. The first telescopic rod extends into the main support. A horizontally mounted mounting plate is installed on the lower end of the first telescopic rod. Vertical fixing blocks are symmetrically arranged at the front and rear of the mounting plate. A gripper assembly is movably connected between the ends of the two connecting blocks. A gripper drive assembly for driving the gripper assembly to open and close is installed on the middle of the lower surface of the mounting plate.

[0008] Furthermore, the gripper drive assembly includes a drive block that slides between two connecting blocks, and a vertical electric push rod is installed on the lower surface of the mounting plate between the two connecting blocks. The telescopic end of the electric push rod is connected to the drive block. The gripper assembly includes gripper blocks symmetrically arranged front and rear. The gripper blocks are connected to the drive block and the connecting blocks via a linkage mechanism.

[0009] Furthermore, an inwardly facing fixing block is provided on the lower end of the two connecting blocks. The linkage mechanism includes a second connecting rod, the middle of which is rotatably connected to the end of the connecting block. One end of the second connecting rod is rotatably connected to a first connecting rod, and the other end is rotatably connected to a gripper block on the same side. One end of the first connecting rod is connected to the end of the second connecting rod, and the other end is rotatably connected to a driving block. A third connecting rod is rotatably connected to the fixing block, and the other end of the third connecting rod is rotatably connected to a gripper block on the same side. The third connecting rod is arranged parallel to the corresponding second connecting rod.

[0010] Furthermore, the clamping mechanism includes a clamping base, and a clamping assembly is installed on the upper inner side of the clamping base. The clamping assembly includes a fixed block and a movable block. The fixed block includes a clamping fixing block, which is fixed to the clamping base. A fixed clamping block is provided on the front part of the clamping fixing block on the side away from the clamping base. The movable block includes a clamping sliding block, which slides horizontally on the side of the clamping fixing block away from the clamping base. A movable clamping block is provided on the end of the clamping sliding block facing the fixed clamping block.

[0011] Furthermore, a clamping drive assembly for driving the movement of the clamping sliding block is provided on the end of the clamping fixing block away from the fixed clamping block. The clamping drive assembly includes a screw. One end of the screw is rotatably connected to the end of the fixed clamping block, and a turntable with a handle for driving the movement of the screw is installed on the other end of the screw. A clamping limit block is provided on the end of the clamping sliding block away from the movable clamping block, and the clamping limit block is provided with a screw hole that mates with the screw.

[0012] Furthermore, the driving device includes a vertical driving mounting plate, on the front side of which a rhomboid plate driven by a motor is rotatably connected. An arc-shaped block is rotatably connected to each of the two acute-angled ends of the rhomboid plate. The two arc-shaped blocks are angularly symmetrically distributed between them, and the other ends of the two arc-shaped blocks are rotatably connected to a clamping base on the same side.

[0013] Furthermore, the main support includes a base, a top plate is provided above the base, vertical support columns are installed at the four corners of the base, the upper ends of the support columns are fixed to the bottom of the top plate, the clamping mechanism is slidably connected to the top plate, and the slide rail and drive mounting plate are installed on the base.

[0014] Furthermore, a front-to-back oriented mounting groove is provided in the middle of the top plate, and a front-to-back oriented sliding groove is provided in the middle of the bottom of the mounting groove. A front-to-back oriented elongated guide hole is provided in the middle of the sliding groove. A cover plate is provided on the mounting groove to close the opening of the sliding groove. A through hole is provided on the cover plate corresponding to the elongated guide hole. The telescopic motor is slidably connected to the top plate. The first telescopic rod extends into the space between the base and the top plate through the through hole, the sliding groove, and the elongated guide hole. A clamping sliding block is slidably connected to the sliding groove. The clamping sliding block is sleeved on the outside of the first telescopic rod.

[0015] Furthermore, the slide rail includes a guide groove formed on the base plate, a sliding rod parallel to the guide groove is provided in the guide groove, the clamping base is slidably connected in the guide groove, and a sliding hole is provided under the clamping base corresponding to the sliding rod.

[0016] Compared with the prior art, the present invention has the following advantages: it is reasonably designed, the spacing between the two clamping bases can be adjusted according to the length requirements of the workpiece, the clamping component can effectively clamp the end of the workpiece, and the clamping mechanism can effectively clamp the moving workpiece to be processed, reducing manual labor and making operation convenient. Attached Figure Description

[0017] Figure 1 This is a front three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is the utility model Figure 1 Schematic diagram of part A in the middle;

[0019] Figure 3 This is a three-dimensional structural diagram of the rear side of this utility model;

[0020] Figure 4 This is a schematic diagram of the clamping mechanism of this utility model;

[0021] Figure 5 This is a cross-sectional view of the clamping mechanism of this utility model after installation;

[0022] Figure 6 This is a schematic diagram of the clamping assembly structure of this utility model.

[0023] In the diagram: 1-Main support; 2-Clamping mechanism; 3-Slide rail; 4-Clamping mechanism; 5-Drive device; 6-Telescopic motor; 7-First telescopic rod; 8-Mounting plate; 9-Fixing block; 10-Gripper assembly; 11-Gripper drive assembly; 12-Drive block; 13-Electric push rod; 14-Gripper block; 15-Half clearance groove; 16-Fixing block; 17-Second connecting rod; 18-First connecting rod; 19-Third connecting rod; 20-Clamping base; 21-Clamping assembly; 22-Fixing block; 23-Moving clip 24-Clamping and fixing block; 25-Fixed clamping block; 26-Clamping sliding block; 27-Modible clamping block; 28-Semi-clamping groove; 29-Clamping drive assembly; 30-Screw; 31-Turntable; 32-Clamping limit block; 33-Drive mounting plate; 34-Rhomboid plate; 35-Arc-shaped block; 36-Base; 37-Top plate; 38-Support column; 39-Mounting groove; 40-Sliding groove; 41-Long guide hole; 42-Cover plate; 43-Through hole; 44-Clamping sliding block; 45-Guide groove; 46-Sliding rod. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] like Figure 1-6 As shown, a clamping mechanism includes a main support 1, a clamping mechanism 2 that moves back and forth slidably on the upper part of the main support, a left-right slide rail 3 provided inside the main support, and clamping mechanisms 4 symmetrically slidably slidably on the left and right sides of the slide rail, with the two clamping mechanisms moving in opposite directions. A driving device 5 for driving the clamping mechanisms to slide is provided behind the main support between the two clamping mechanisms. In use, the workpiece to be processed is clamped by the clamping mechanism to the middle of the two clamping mechanisms, and the two clamping mechanisms are driven to move by the driving device. Finally, the two clamping mechanisms clamp the two ends of the workpiece, and the clamping mechanism slides open to perform processing.

[0028] In this embodiment, to enable the clamping mechanism to clamp and lift the workpiece, the clamping mechanism includes an existing telescopic motor 6 located at the top of the main support, or it could be an electric push rod. The telescopic end of the telescopic motor faces downward, and a first telescopic rod 7 is connected to the telescopic end. The first telescopic rod extends into the main support, and a horizontally mounted mounting plate 8 is installed on the lower end of the first telescopic rod. Vertical fixing blocks 9 are symmetrically arranged at the front and rear of the mounting plate, so that the mounting plate and the two fixing blocks combine to form an inverted U-shape. A gripper assembly 10 is movably connected between the ends of the two connecting blocks. A gripper drive assembly 11 for driving the gripper assembly to open and close is installed on the middle of the lower surface of the mounting plate. In use, the lower gripper assembly is lifted and lowered by the telescopic motor, and the gripper drive assembly is used to drive the gripper assembly to open and close, thereby enabling the gripper assembly to clamp the workpiece.

[0029] In this embodiment, to specifically realize the opening and closing of the gripper assembly, the gripper drive assembly includes a drive block 12 slidably connected between two connecting blocks. A vertical electric push rod 13 is installed on the lower surface of the mounting plate between the two connecting blocks. The telescopic end of the electric push rod is connected to the drive block, and the sliding of the drive block is realized by the electric push rod. The gripper assembly includes gripper blocks 14 symmetrically arranged front and rear. Specifically, the two gripper blocks are movably connected to the two ends of the U-shaped surface on one side formed by the mounting plate and the two fixed blocks, respectively. The sides of the gripper blocks that fit together are provided with semi-yielding grooves 15 for clamping the workpiece. When the two gripper blocks are closed, the two semi-yielding grooves combine to form a clamping groove. The gripper blocks are connected to the drive block and the connecting block on the same side through a linkage mechanism. The linkage mechanism is driven by the electric push rod, and finally the gripper assembly is opened and closed.

[0030] In this embodiment, to specifically realize the movement of the gripper, each of the two connecting blocks has an inwardly facing fixing block 16 at its lower end. The linkage mechanism includes a second connecting rod 17, the middle of which is rotatably connected to the end of the connecting block. One end of the second connecting rod is rotatably connected to a first connecting rod 18, and the other end is rotatably connected to the gripper block on the same side. One end of the first connecting rod is connected to the end of the second connecting rod, and the other end is rotatably connected to the driving block. A third connecting rod 19 is rotatably connected to the fixing block, and the other end of the third connecting rod is rotatably connected to the gripper block on the same side. The third link is arranged parallel to the corresponding second link. Specifically, the distance between the third link, the second link, the rotation connection point in the middle of the second link and the rotation connection point of the third link on the fixed block, and the distance between the rotation connection point of the second link on the gripper block and the rotation connection point of the third link on the gripper block, together form a parallel four-bar linkage mechanism to achieve stable opening and closing of the gripper. The specific usage method is as follows: the drive block slides to drive the first link to move, which in turn drives the second link to move. The second link drives the entire parallel four-bar linkage mechanism to move, thereby realizing the opening and closing of the gripper assembly.

[0031] In this embodiment, to enable the clamping mechanism to hold the processed end, the clamping mechanism includes a clamping base 20. A clamping assembly 21 is installed on the upper inner side of the clamping base. The inner side refers to the side near the middle of the main support. The clamping assembly includes a fixed latch 22 and a movable latch 23. The fixed latch includes a clamping fixing block 24, which is fixed to the side of the clamping base. A fixed clamping block 25 is provided on the front part of the clamping fixing block on the side away from the clamping base. The movable latch includes a clamping sliding block 26, which slides horizontally on the clamping base. On the side of the clamping block away from the clamping base, a movable clamping block 27 is provided on the end of the clamping sliding block facing the fixed clamping block. A semi-clamping groove 28 is provided on the side of the fixed clamping block that is in contact with the movable clamping block. By sliding the clamping sliding block, the two semi-clamping grooves can clamp the workpiece. Specifically, a limiting groove is provided on the side of the clamping block away from the clamping base, and a limiting guide rail is provided on the clamping sliding block corresponding to the limiting groove. Through the cooperation of the limiting guide rail and the limiting groove, the clamping block and the clamping sliding block can slide together, preventing the clamping sliding block from falling off.

[0032] In this embodiment, in order to drive the sliding of the movable clamping block, a clamping drive assembly 29 for driving the movement of the clamping sliding block is provided on the end of the clamping fixed block away from the fixed clamping block. The clamping drive assembly includes a screw 30, one end of which is rotatably connected to the end of the fixed clamping block, and a turntable 31 with a handle for driving the movement of the screw is installed on the other end of the screw. A clamping limit block 32 is provided on the end of the clamping sliding block away from the movable clamping block. The clamping limit block is provided with a screw hole that cooperates with the screw. In use, the turntable is driven to rotate by the handle, which in turn drives the screw to rotate, and finally realizes the linear movement of the clamping limit block on the screw, thereby realizing the separation and opening and closing of the fixed clamping block and the movable clamping block, and realizing the clamping of the end of the workpiece. Due to the cooperation of the limit guide rail and the limit slide groove, the clamping sliding block is prevented from falling off.

[0033] In this embodiment, to achieve the separation and approach of the two clamping bases, the driving device includes a vertical driving mounting plate 33. A rhomboid plate 34 driven by a motor is rotatably connected to the front side of the driving mounting plate. An arc-shaped block 35 is rotatably connected to each of the two acute-angled ends of the rhomboid plate. The two arc-shaped blocks are angularly symmetrically distributed between each other. The other ends of the two arc-shaped blocks are rotatably connected to the clamping bases on the same side. The angularly symmetrical distribution between the two arc-shaped blocks allows the two clamping bases to move in opposite directions along a straight line. By rotating the motor, the rhomboid plate is driven to rotate, thereby realizing the movement of the arc-shaped blocks around the axis, achieving the separation and approach of the two clamping bases. This allows the clamping bases on both sides to adjust the distance between the workpieces, enabling the clamping of workpieces of different lengths.

[0034] In this embodiment, for rational design, the main support includes a base 36, a top plate 37 above the base, and vertical support columns 38 installed at the four corners of the base. The upper ends of the support columns are fixed to the bottom of the top plate. The clamping mechanism is slidably connected to the top plate. The slide rail and drive mounting plate are installed on the base. Specifically, to realize the sliding of the clamping mechanism, a front-to-back oriented mounting groove 39 is opened in the middle of the top plate. A front-to-back oriented sliding groove 40 is opened in the middle of the bottom of the mounting groove. A front-to-back oriented elongated guide hole 41 is provided in the middle of the sliding groove. The top cover is provided with a cover plate 42, which closes the opening of the sliding groove. A through hole 43 is provided on the cover plate corresponding to the long guide hole. The telescopic motor is slidably connected to the top plate. The first telescopic rod extends into the space between the base and the top plate through the through hole, the sliding groove, and the long guide hole. A clamping sliding block 44 is slidably connected in the sliding groove. The clamping sliding block is sleeved on the outside of the first telescopic rod, that is, the first telescopic rod is vertically slidably connected to the clamping sliding block. This is to achieve smooth sliding. At the same time, a screw mechanism (not shown) for driving the telescopic motor to slide can be provided on the top plate. Since the screw mechanism is existing technology, it will not be described in detail.

[0035] In this embodiment, in order to achieve the sliding of the clamping base, the slide rail includes a guide groove 45 formed on the base plate, a sliding rod 46 parallel to the guide groove is provided in the guide groove, the clamping base is slidably connected in the guide groove, and a sliding hole is provided under the clamping base corresponding to the sliding rod.

[0036] Unless otherwise stated, if any of the technical solutions disclosed in this utility model discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this utility model discloses only some numerical values ​​to illustrate the technical solutions of this utility model. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this utility model.

[0037] If the terms "first" or "second" are used in this document to specify components, those skilled in the art should know that the use of "first" or "second" is merely for the purpose of distinguishing components in description, and unless otherwise stated, the above terms have no special meaning.

[0038] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured by integral molding using a casting process) (except where it is obviously impossible to use an integral molding process).

[0039] Furthermore, the orientations or positional relationships indicated by terms such as "longitudinal," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used in any of the technical solutions disclosed in this utility model are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this patent. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent. In addition, unless otherwise stated, the terms used to indicate shape in any of the technical solutions disclosed in this utility model include shapes that are similar to, close to, or approximate with it.

[0040] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A clamping mechanism, characterized in that: The system includes a main support frame, on the upper part of which a clamping mechanism that moves back and forth is slidably connected. The main support frame is provided with a left-right slide rail, and clamping mechanisms are symmetrically slidably connected in the slide rail. The two clamping mechanisms move in opposite directions. A driving device for driving the clamping mechanisms to slide is provided at the rear of the main support frame between the two clamping mechanisms. The gripping mechanism includes a telescopic motor located at the top of the main support. The telescopic end of the telescopic motor faces downward and is connected to a first telescopic rod. The first telescopic rod extends into the main support. A horizontally mounted mounting plate is installed on the lower end of the first telescopic rod. Vertical fixing blocks are symmetrically arranged at the front and rear of the mounting plate. A gripper assembly is movably connected between the ends of the two connecting blocks. A gripper drive assembly for driving the gripper assembly to open and close is installed on the middle of the lower surface of the mounting plate. The clamping mechanism includes a clamping base, and a clamping assembly is installed on the upper inner side of the clamping base. The clamping assembly includes a fixed block and a movable block. The fixed block includes a clamping fixing block, which is fixed to the clamping base. A fixed clamping block is provided on the front part of the clamping fixing block on the side away from the clamping base. The movable block includes a clamping sliding block, which slides horizontally on the side of the clamping fixing block away from the clamping base. A movable clamping block is provided on the end of the clamping sliding block facing the fixed clamping block.

2. The clamping mechanism according to claim 1, characterized in that; The gripper drive assembly includes a drive block that slides between two connecting blocks. A vertical electric push rod is installed on the lower surface of the mounting plate between the two connecting blocks. The telescopic end of the electric push rod is connected to the drive block. The gripper assembly includes gripper blocks symmetrically arranged front and rear. The gripper blocks are connected to the drive block and the connecting blocks via a linkage mechanism.

3. The clamping mechanism according to claim 2, characterized in that; The lower ends of the two connecting blocks are provided with inwardly facing fixed blocks. The linkage mechanism includes a second connecting rod, the middle of which is rotatably connected to the end of the connecting block. One end of the second connecting rod is rotatably connected to a first connecting rod, and the other end is rotatably connected to a gripper block on the same side. One end of the first connecting rod is connected to the end of the second connecting rod, and the other end is rotatably connected to a drive block. A third connecting rod is rotatably connected to the fixed block, and the other end of the third connecting rod is rotatably connected to a gripper block on the same side. The third connecting rod is arranged parallel to the corresponding second connecting rod.

4. The clamping mechanism according to claim 1, characterized in that; A clamping drive assembly for driving the movement of the clamping sliding block is provided on one end of the clamping fixing block away from the fixing clamping block. The clamping drive assembly includes a screw. One end of the screw is rotatably connected to the end of the fixed clamping block, and a turntable with a handle is installed on the other end of the screw for driving the screw to move. A clamping limit block is provided on the end of the clamping sliding block away from the movable clamping block, and a screw hole that mates with the screw is provided on the clamping limit block.

5. The clamping mechanism according to claim 1, characterized in that; The driving device includes a vertical driving mounting plate. A rhomboid plate driven by a motor is rotatably connected to the front side of the driving mounting plate. An arc-shaped block is rotatably connected to each of the two acute-angled ends of the rhomboid plate. The two arc-shaped blocks are angularly symmetrically distributed between them. The other ends of the two arc-shaped blocks are rotatably connected to a clamping base on the same side.

6. The clamping mechanism according to claim 5, characterized in that; The main support includes a base, a top plate is provided above the base, vertical support columns are installed at the four corners of the base, the upper ends of the support columns are fixed to the bottom of the top plate, the clamping mechanism is slidably connected to the top plate, and the slide rail and drive mounting plate are installed on the base.

7. The clamping mechanism according to claim 6, characterized in that; The top plate has a front-to-back oriented mounting groove in the middle, and a front-to-back oriented sliding groove in the middle of the bottom of the mounting groove. A front-to-back oriented long guide hole is provided in the middle of the sliding groove. A cover plate is provided on the mounting groove to close the opening of the sliding groove. A through hole is provided on the cover plate corresponding to the long guide hole. The telescopic motor is slidably connected to the top plate. The first telescopic rod extends between the base and the top plate through the through hole, the sliding groove, and the long guide hole. A clamping sliding block is slidably connected to the sliding groove. The clamping sliding block is sleeved on the outside of the first telescopic rod.

8. The clamping mechanism according to claim 6, characterized in that; The slide rail includes a guide groove formed on the base plate, a sliding rod parallel to the guide groove is provided in the guide groove, the clamping base is slidably connected in the guide groove, and a sliding hole is provided under the clamping base corresponding to the sliding rod.

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