Die cutting device for high-precision heat-conducting gasket production
By designing a high-precision thermal gasket die-cutting device including electric telescopic rods, servo motors, hollow plates, movable plates and springs, the problems of thermal gasket retention and uneven material arches are solved, and efficient and accurate die-cutting of thermal gaskets is achieved.
Patent Information
- Application Number
- CN202420822122.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-19
AI Technical Summary
After the cutting of the existing thermal gasket die-cutting device is completed, the thermal gasket stays in the cutting mold due to friction and needs to be taken out separately, which reduces the working efficiency and the material is prone to arching uneven during the cutting process, resulting in the inconsistent size of the cut thermal gasket and reduces the accuracy of the cutting.
A die-cutting device for the production of high-precision thermal gaskets is designed. The device includes a base plate, a vertical plate, a hollow plate, a cutting mold, an ejection block, a movable plate, a limiting rod and a spring. Through the cooperation of the electric telescopic rod and a servo motor, the up and down movement of the hollow plate and the extrusion of the movable plate are realized, ensuring that the thermal gaskets can be ejected smoothly after the die-cut is completed, avoiding retention, and the materials are kept flat by the cooperation of the pressing roller and the pushing plate, and ensuring the cutting accuracy.
The problem of thermal conductivity gaskets staying in the cutting mold after die cutting is effectively avoided, and the working efficiency is improved. By keeping the material flat, the size of the thermal conductivity gaskets is consistent and the accuracy of die cutting is improved.
Smart Images
Figure CN222587808U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat-conducting pad production, in particular to a die-cutting device for producing high-precision heat-conducting pads. Background Art
[0002] Thermal pads are used to fill the air gap between heat-generating components and heat sinks or metal bases. Their flexible and elastic characteristics enable them to be used to cover very uneven surfaces. Heat is conducted from separate components or the entire PCB to the metal housing or diffusion plate, thereby improving the efficiency and service life of heat-generating electronic components.
[0003] In the existing die-cutting of thermal gaskets, the cut thermal gaskets are retained in the cutting die due to friction after cutting, and need to be taken out separately, which greatly reduces the work efficiency. In addition, the material is prone to arching and unevenness during the cutting process, resulting in inconsistent sizes of the cut thermal gaskets, which reduces the cutting accuracy. For this reason, we propose a die-cutting device for the production of high-precision thermal gaskets. Utility Model Content
[0004] The purpose of the utility model is to provide a die-cutting device for the production of high-precision thermal gaskets, so as to solve the problem raised in the above background technology that when the thermal gaskets are die-cut, the cut thermal gaskets are retained in the cutting mold due to the friction after cutting, and need to be taken out separately, which greatly reduces the work efficiency, and the material is prone to arching and unevenness during the cutting process, resulting in the cut thermal gaskets being inconsistent in size, thereby reducing the cutting accuracy.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a die-cutting device for producing high-precision thermal conductive gaskets, comprising a bottom plate, a vertical plate fixedly connected to the middle of the rear side wall of the bottom plate, a mounting plate fixedly connected to the upper side of the front side wall of the vertical plate, a first electric telescopic rod fixedly connected to the front side of the bottom of the mounting plate, a hollow plate fixedly connected to the bottom end of the first electric telescopic rod, a slotted hole opened at the bottom of the hollow plate and the slotted holes are evenly distributed, the inner cavity of the slotted hole is connected to the inner cavity of the hollow plate, and a cutting tool is inserted into the inner cavity of the slotted hole. The mold, the inner cavity of the cutting mold is slidably connected with an ejector block, the top of the ejector block extends to the inner cavity of the hollow plate and is fixedly connected with a movable plate, the bottom of the ejector block extends to the outside of the cutting mold, and limiting rods are fixedly connected between the top and bottom of the four corners of the inner cavity of the hollow plate, the outer side walls of the four limiting rods are slidably connected with the inner cavity of the movable plate, the outer side wall of the limiting rod is sleeved with a spring, the top of the spring is fixedly connected to the top of the inner cavity of the hollow plate, and the bottom of the spring is fixedly connected to the top of the movable plate.
[0006] As a further description of the above technical solution:
[0007] A limiting groove is formed on the front side wall of the vertical plate, the inner cavity of the limiting groove is slidably connected to a limiting block, and the front side wall of the limiting block extends to the outside of the limiting groove and is fixedly connected to the rear side wall of the hollow plate.
[0008] As a further description of the above technical solution:
[0009] A servo motor is fixedly connected to the front side of the left side wall of the base plate by bolts, a transverse groove is opened on the front side wall of the base plate, a first screw rod is rotatably connected to the right side wall of the inner cavity of the transverse groove by a bearing, the end of the first screw rod is fixedly connected to the output shaft of the servo motor, a moving block is screwed to the outer side wall of the first screw rod, the outer side wall of the moving block is slidably connected to the inner cavity of the transverse groove, the front side wall of the moving block extends to the outside of the transverse groove, a column is fixedly connected to the top front side of the moving block, and a vertical groove is opened on the rear side wall of the column.
[0010] As a further description of the above technical solution:
[0011] The bottom of the inner cavity of the vertical groove is rotatably connected to a second screw rod through a bearing, and the outer wall of the second screw rod is screwed with a pressing plate, the outer wall of the pressing plate is slidably connected to the inner cavity of the vertical groove, and the rear side wall of the pressing plate extends to the outside of the vertical groove, and the bottom left front and rear sides of the pressing plate are fixedly connected to a connecting plate, and a pressing roller is rotatably connected between the rear side wall of the connecting plate on the front side and the front side wall of the connecting plate on the rear side through a pin shaft, and the bottom right side of the pressing plate is fixedly connected to a pushing plate.
[0012] As a further description of the above technical solution:
[0013] A fixing block is fixedly connected to the left side of the top of the bottom plate, and a fixing groove is formed on the right side wall of the fixing block.
[0014] As a further description of the above technical solution:
[0015] A fixing plate is slidably connected to the inner cavity of the fixing groove, an outer wall of the fixing plate is slidably connected to the inner cavity of the fixing groove, a right side wall of the fixing plate extends to the outside of the fixing groove, a second electric telescopic rod is fixedly connected to the top of the fixing block, and a bottom end of the second electric telescopic rod extends to the inner cavity of the fixing groove and is fixedly connected to the top of the fixing plate.
[0016] Compared with the prior art, the beneficial effects of the utility model are:
[0017] 1. The die-cutting device for producing high-precision thermal pads starts the first electric telescopic rod through an external controller, and the first electric telescopic rod drives the hollow plate to move downward through the limit block and the limit groove. When the ejection block contacts the material, it is squeezed and contracted into the cutting mold, thereby driving the movable plate to move. The spring is squeezed by the movable plate and contracts. The cutting mold continues to move downward under the action of the hollow plate to die-cut the material. After completion, the first electric telescopic rod drives the hollow plate to move upward, and the spring rebounds through the movable plate and the ejection block to eject the thermal pad in the cutting mold, which can prevent the die-cut thermal pad from being retained in the cutting mold.
[0018] 2. The die-cutting device for producing high-precision thermal pads starts the second electric telescopic rod through an external controller, and the second electric telescopic rod drives the fixed plate to fix the material. The servo motor is started through the external controller, and the output shaft of the servo motor rotates to drive the first screw rod to drive the column to move to the left through the moving block, and the second screw rod is rotated. The second screw rod rotates and drives the pressing roller and the pushing plate to move downward through the pressing plate to contact the material, and the servo motor is started again. The pressing plate drives the pressing roller and the pushing plate to move to the right, and the pushing plate pushes the material flat. The pressing roller presses the flattened material to prevent it from arching again. When it reaches the end position, the second screw rod is rotated again to make the pressing roller move further downward to further press and fix the material, which can avoid the inconsistent size of the die-cut thermal pads due to the uneven arching of the material during die-cutting, thereby improving the accuracy of die-cutting. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a structural stereoscopic schematic diagram of a die-cutting device for producing high-precision thermal conductive pads proposed by the utility model;
[0020] Figure 2 This is a schematic diagram of the main cross-sectional view of the structure of a die-cutting device for producing high-precision thermal conductive pads proposed by the utility model;
[0021] Figure 3 This is a schematic diagram of a left-side cross-sectional portion of a structural vertical plate of a die-cutting device for producing high-precision thermal conductive pads proposed by the utility model;
[0022] Figure 4 It is a left-side sectional schematic diagram of a structural column of a die-cutting device for producing high-precision thermal conductive pads proposed by the utility model;
[0023] Figure 5 The utility model proposes a high-precision thermal conductive pad production die-cutting device Figure 2 Enlarged structural diagram at A in the middle.
[0024] In the figure: 100, bottom plate; 110, vertical plate; 111, mounting plate; 112, first electric telescopic rod; 113, hollow plate; 114, slot; 115, cutting mold; 116, ejector block; 117, movable plate; 118, limit rod; 119, spring; 120, limit groove; 121, limit block; 130, servo motor; 131, transverse groove; 132, first screw rod; 133, moving block; 134, column; 135, vertical groove; 140, second screw rod; 141, pressing plate; 142, connecting plate; 143, pressing roller; 144, pushing plate; 150, fixed block; 151, fixed groove; 160, fixed plate; 161, second electric telescopic rod. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.
[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0028] The utility model provides a high-precision die-cutting device for producing thermally conductive gaskets, which can prevent the die-cut thermally conductive gaskets from being retained in the cutting die 115, and can prevent the die-cut thermally conductive gaskets from being inconsistent in size due to uneven material arching during die-cutting, thereby improving the accuracy of die-cutting. Figure 1-5 , comprising a base plate 100;
[0029] Please refer again Figure 1 , Figure 2 , Figure 3 and Figure 5A vertical plate 110 is fixedly connected to the middle of the rear side wall of the bottom plate 100, and the vertical plate 110 is used to install the mounting plate 111. The mounting plate 111 is fixedly connected to the upper side of the front side wall of the vertical plate 110. The mounting plate 111 is used to install the first electric telescopic rod 112. The first electric telescopic rod 112 is fixedly connected to the front side of the bottom of the mounting plate 111. The first electric telescopic rod 112 is used to drive the hollow plate 113 to move up and down. The bottom end of the first electric telescopic rod 112 is fixedly connected to the hollow plate 113. The hollow plate 113 is used to drive the cutting mold 115 to die-cut the material. The bottom of the hollow plate 113 is provided with slots 114 and the slots 114 are evenly distributed. The slots 114 are used to install the cutting mold 115, and the inner cavity of the slots 114 is aligned with the inner cavity of the slots 114. The inner cavity of the hollow plate 113 is connected, and the inner cavity of the slot 114 is plugged with a cutting mold 115, which is used to die-cut the material. The inner cavity of the cutting mold 115 is slidably connected with an ejector block 116, which is used to eject the die-cut thermal pad out of the cutting mold 115. The top of the ejector block 116 extends to the inner cavity of the hollow plate 113 and is fixedly connected with a movable plate 117, which is used to install the ejector block 116. The bottom of the ejector block 116 extends to the outside of the cutting mold 115. The top and bottom of the inner cavity of the four corners of the hollow plate 113 are fixedly connected with a limiting rod 118, which is used to install and limit the movable plate 117. The outer side walls of the four limiting rods 118 are connected to the movable plate 117. The inner cavity of the movable plate 117 is slidably connected, and the outer side wall of the limiting rod 118 is sleeved with a spring 119. The spring 119 is used to cooperate with the movable plate 117 to eject the cut thermal pad through the ejection block 116. The top of the spring 119 is fixedly connected to the top of the inner cavity of the hollow plate 113, and the bottom of the spring 119 is fixedly connected to the top of the movable plate 117. The front side wall of the vertical plate 110 is provided with a limiting groove 120, and the limiting groove 120 is used to install a limiting block 121. The inner cavity of the limiting groove 120 is slidably connected to the limiting block 121. The limiting block 121 is used to limit the hollow plate 113 to prevent the hollow plate 113 from deflecting during die cutting, thereby improving the die cutting accuracy. The front side wall of the limiting block 121 extends to the outside of the limiting groove 120 The first electric telescopic rod 112 is fixedly connected to the rear side wall of the hollow plate 113, and the first electric telescopic rod 112 is started through the external controller, so that the first electric telescopic rod 112 drives the hollow plate 113 to move downward through the limit block 121 and the limit groove 120. When the ejection block 116 contacts the material, it is squeezed and contracted into the cutting die 115, thereby driving the movable plate 117 to move. The spring 119 is squeezed by the movable plate 117 and contracts. The cutting die 115 continues to move downward under the action of the hollow plate 113 to die-cut the material. After completion, the first electric telescopic rod 112 drives the hollow plate 113 to move upward, and the spring 119 rebounds through the movable plate 117 and cooperates with the ejection block 116 to eject the thermal conductive pad in the cutting die 115.
[0030] In summary, it is possible to prevent the die-cut thermal pad from being retained in the cutting mold 115 .
[0031] Please refer again Figure 1 , Figure 2 and Figure 4The front side of the left side wall of the bottom plate 100 is fixedly connected with a servo motor 130 by bolts. The servo motor 130 is used to drive the first screw rod 132 to rotate. The front side wall of the bottom plate 100 is provided with a transverse groove 131. The transverse groove 131 is used to limit the moving block 133. The right side wall of the inner cavity of the transverse groove 131 is rotatably connected with the first screw rod 132 through a bearing. The first screw rod 132 is used to drive the moving block 133 to move. The end of the first screw rod 132 is fixedly connected to the output shaft of the servo motor 130. The outer side wall of the first screw rod 132 is screwed with a moving block 133. The moving block 133 is used to drive the column 134 to move. The outer side wall of the moving block 133 is slidably connected to the inner cavity of the transverse groove 131. The front side wall of the moving block 133 extends to the outer side of the transverse groove 131. The top front side of the moving block 133 is fixedly connected with a column 134, and the column 134 is used to install a pressing plate 141. The rear side wall of the column 134 is provided with a vertical groove 135, and the vertical groove 135 is used to limit the pressing plate 141. The bottom of the inner cavity of the vertical groove 135 is rotatably connected with a second screw rod 140 through a bearing. The second screw rod 140 is used to drive the pressing plate 141 to move. The outer side wall of the second screw rod 140 is screwed with a pressing plate 141, and the pressing plate 141 is used to drive the pressing roller 143 and the pushing plate 144 to move. The outer side wall of the pressing plate 141 is slidably connected with the inner cavity of the vertical groove 135, and the rear side wall of the pressing plate 141 extends to the outside of the vertical groove 135. The front and rear sides of the bottom left side of the pressing plate 141 are fixedly connected with a connecting plate 142, and the connecting plate 142 is connected to the pressing plate 143. The connecting plate 142 is used to install a pressing roller 143. The pressing roller 143 is rotatably connected between the rear side wall of the front connecting plate 142 and the front side wall of the rear connecting plate 142 through a pin shaft. The pressing roller 143 is used to press the material. A pushing plate 144 is fixedly connected to the right side of the bottom of the pressing plate 141. The pushing plate 144 pushes the material flat. A fixing block 150 is fixedly connected to the left side of the top of the bottom plate 100. The fixing block 150 is used to cooperate with the fixing plate 160 to fix the material. A fixing groove 151 is opened on the right side wall of the fixing block 150. The fixing groove 151 is used to limit the fixing plate 160. The inner cavity of the fixing groove 151 is slidably connected with the fixing plate 160. The fixing plate 160 is used to fix the material. The outer wall of the fixing plate 160 and the fixing groove The inner cavity of 151 is slidably connected, the right side wall of the fixing plate 160 extends to the outside of the fixing groove 151, the top of the fixing block 150 is fixedly connected with the second electric telescopic rod 161, the second electric telescopic rod 161 is used to cooperate with the fixing plate 160 to fix the material, the bottom end of the second electric telescopic rod 161 extends to the inner cavity of the fixing groove 151 and is fixedly connected to the top of the fixing plate 160, the second electric telescopic rod 161 is started by an external controller, the second electric telescopic rod 161 drives the fixing plate 160 to fix the material, the servo motor 130 is started by the external controller, the output shaft of the servo motor 130 rotates to drive the first screw rod 132 to drive the column 134 to move to the left through the moving block 133, and the second screw rod 140 is rotated.The second screw 140 rotates through the pressing plate 141 to drive the pressing roller 143 and the pushing plate 144 to move downward to contact the material, and the servo motor 130 is started again, and the pressing plate 141 drives the pressing roller 143 and the pushing plate 144 to move rightward, and the pushing plate 144 pushes the material flat, and the pressing roller 143 presses the flattened material to prevent it from arching again. When it reaches the end position, the second screw 140 is rotated again to make the pressing roller 143 move further downward to further press and fix the material;
[0032] In summary, the inconsistent sizes of the die-cut thermal pads due to uneven arching of the material during die-cutting can be avoided, thereby improving the accuracy of die-cutting.
[0033] During specific use, personnel in this technical field place the material on the bottom plate 100, start the second electric telescopic rod 161 through an external controller, the second electric telescopic rod 161 drives the fixed plate 160 to fix the material, start the servo motor 130 through the external controller, the output shaft of the servo motor 130 rotates to drive the first screw rod 132 to drive the column 134 to move to the left through the moving block 133, rotate the second screw rod 140, the second screw rod 140 rotates to drive the pressing roller 143 and the pushing plate 144 to move downward through the pressing plate 141 to contact the material, start the servo motor 130 again, the pressing plate 141 drives the pressing roller 143 and the pushing plate 144 to move to the right, the pushing plate 144 pushes the material flat, and the pressing roller 143 presses the flattened material to prevent it from arching again, and reaches When the material is in the end position, the second screw rod 140 is rotated again to make the pressing roller 143 move further downward to further press and fix the material. The first electric telescopic rod 112 is started by the external controller. The first electric telescopic rod 112 drives the hollow plate 113 to move downward through the limit block 121 and the limit groove 120. When the ejection block 116 contacts the material, it is squeezed and contracted into the cutting die 115, thereby driving the movable plate 117 to move. The spring 119 is squeezed by the movable plate 117 and contracts. The cutting die 115 continues to move downward under the action of the hollow plate 113 to die-cut the material. After completion, the first electric telescopic rod 112 drives the hollow plate 113 to move upward, and the spring 119 rebounds through the movable plate 117 and cooperates with the ejection block 116 to eject the thermal conductive gasket in the cutting die 115.
[0034] In the description of this specification, the description with reference to the terms "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 the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0035] 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 spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A die-cutting device for producing high-precision thermal conductive pads, characterized in that: The invention comprises a bottom plate (100), a vertical plate (110) is fixedly connected to the middle of the rear side wall of the bottom plate (100), a mounting plate (111) is fixedly connected to the upper side of the front side wall of the vertical plate (110), a first electric telescopic rod (112) is fixedly connected to the front side of the bottom of the mounting plate (111), a hollow plate (113) is fixedly connected to the bottom end of the first electric telescopic rod (112), a slot hole (114) is opened at the bottom of the hollow plate (113), and the slot holes (114) are evenly distributed, the inner cavity of the slot hole (114) is connected to the inner cavity of the hollow plate (113), the inner cavity of the slot hole (114) is plugged with a cutting mold (115), and the inner cavity of the cutting mold (115) is slidably connected to An ejector block (116), the top of which extends to the inner cavity of the hollow plate (113) and is fixedly connected to a movable plate (117), the bottom of which extends to the outside of the cutting mold (115), and limiting rods (118) are fixedly connected between the top and bottom of the four corners of the inner cavity of the hollow plate (113), the outer side walls of the four limiting rods (118) are slidably connected to the inner cavity of the movable plate (117), the outer side walls of the limiting rods (118) are sleeved with springs (119), the top of the springs (119) are fixedly connected to the top of the inner cavity of the hollow plate (113), and the bottom of the springs (119) are fixedly connected to the top of the movable plate (117).
2. A die-cutting device for producing high-precision thermally conductive gaskets according to claim 1, characterized in that: A limiting groove (120) is formed on the front side wall of the vertical plate (110); the inner cavity of the limiting groove (120) is slidably connected to a limiting block (121); the front side wall of the limiting block (121) extends to the outside of the limiting groove (120) and is fixedly connected to the rear side wall of the hollow plate (113).
3. The die-cutting device for producing high-precision thermally conductive gaskets according to claim 1, characterized in that: The front side of the left side wall of the base plate (100) is fixedly connected to a servo motor (130) by bolts, the front side wall of the base plate (100) is provided with a transverse groove (131), the right side wall of the inner cavity of the transverse groove (131) is rotatably connected to a first screw rod (132) through a bearing, the end of the first screw rod (132) is fixedly connected to the output shaft of the servo motor (130), the outer side wall of the first screw rod (132) is screwed with a moving block (133), the outer side wall of the moving block (133) is slidably connected to the inner cavity of the transverse groove (131), the front side wall of the moving block (133) extends to the outside of the transverse groove (131), the top front side of the moving block (133) is fixedly connected to a column (134), and the rear side wall of the column (134) is provided with a vertical groove (135).
4. The die-cutting device for producing high-precision thermally conductive gaskets according to claim 3, characterized in that: The bottom of the inner cavity of the vertical groove (135) is rotatably connected to a second screw rod (140) via a bearing, the outer wall of the second screw rod (140) is screwed with a pressing plate (141), the outer wall of the pressing plate (141) is slidably connected to the inner cavity of the vertical groove (135), the rear side wall of the pressing plate (141) extends to the outside of the vertical groove (135), the front and rear sides of the bottom left side of the pressing plate (141) are fixedly connected to a connecting plate (142), the rear side wall of the front connecting plate (142) and the front side wall of the rear connecting plate (142) are rotatably connected to a pressing roller (143) via a pin shaft, and the bottom right side of the pressing plate (141) is fixedly connected to a pushing plate (144).
5. The die-cutting device for producing high-precision thermally conductive gaskets according to claim 1, characterized in that: A fixing block (150) is fixedly connected to the left side of the top of the bottom plate (100), and a fixing groove (151) is formed on the right side wall of the fixing block (150).
6. The die-cutting device for producing high-precision thermally conductive gaskets according to claim 5, characterized in that: The inner cavity of the fixing groove (151) is slidably connected to a fixing plate (160), the outer side wall of the fixing plate (160) is slidably connected to the inner cavity of the fixing groove (151), the right side wall of the fixing plate (160) extends to the outer side of the fixing groove (151), the top of the fixing block (150) is fixedly connected to a second electric telescopic rod (161), the bottom end of the second electric telescopic rod (161) extends to the inner cavity of the fixing groove (151) and is fixedly connected to the top of the fixing plate (160).
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