Anti-collision new energy charging pile

Abstract

The invention relates to the technical field of charging piles, and discloses an anti-collision new energy charging pile which comprises a supporting mechanism, the supporting mechanism comprises a pile body, the outer surface of the bottom of the pile body is fixedly sleeved with a first supporting frame, and a second sliding groove is formed in the top of the first supporting frame; fixing blocks are fixedly connected to the outer walls of the left side and the right side of the pile body, a display screen is fixedly connected to the front face of the pile body, and when the distance between a vehicle and the pile body is gradually close, a first warning lamp and a second warning lamp start to work, flashing warning is conducted on the vehicle, and a driver is reminded to pay attention to keeping the safe distance through different colors; and if the vehicle continues to approach and the distance between the vehicle and the pile body is too close, the hydraulic rod can quickly respond to pull the protection plate to move to a proper position, so that the pile body is effectively protected, damage to the pile body caused by vehicle collision is avoided, and normal use of the charging pile and structural integrity of the pile body are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of charging piles, and in particular to an anti-collision new energy charging pile. Background Art

[0002] With the improvement of environmental awareness and the strengthening of emission restrictions on traditional fuel vehicles, new energy vehicles have developed rapidly around the world, and the market share of new energy vehicles has continued to rise. The operation of new energy vehicles is inseparable from the support of charging facilities, which has led to an increase in the number of new energy charging piles to meet the growing demand for charging new energy vehicles.

[0003] The patent application with application number CN202323294759.9 discloses an anti-collision new energy charging pile, including a base and a bottom plate located on one side of the base, the charging pile body and the protective frame are installed on the top of the base, side plates are fixed at both ends of the bottom plate, and the same pressure plate is rotatably installed between the two side plates. The rotating shafts on both sides of the pressure plate pass through the side plates and are fixed with driving gears. The driving gear is connected to the driven gear through a conveyor belt, and the same rotating rod rotatably installed on the protective frame is fixed between the two driven gears.

[0004] To sum up, traditional three-dimensional charging piles are generally installed directly on the ground. When novice drivers use charging piles, it is often difficult to accurately control the distance between vehicles, which can easily lead to collisions between new energy vehicles and charging piles, thereby causing damage to the charging piles. Once the charging piles are collided, it is very likely that the outer shell will be cracked, the internal circuit will be damaged, the charging interface will be deformed, and other problems will occur, thus affecting the normal use of the charging piles.

[0005] To this end, we proposed an anti-collision new energy charging pile. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides an anti-collision new energy charging pile to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an anti-collision new energy charging pile, comprising a supporting mechanism, the supporting mechanism comprising a pile body, a first supporting frame fixedly sleeved on the bottom outer surface of the pile body, a second sliding groove provided on the top of the first supporting frame, a fixed block fixedly connected to the left and right outer walls of the pile body, a display screen fixedly connected to the front of the pile body, a first warning light fixedly connected to the outer wall of the pile body on the side close to the display screen, a second connecting rod fixedly connected to the back of the pile body, a first sliding groove provided on the outer surface of the second connecting rod, a second line card fixedly connected to the outer wall of the pile body on the side close to the fixed block, and further comprising: The protection mechanism includes a sliding frame arranged outside the pile body, the bottom inner wall of the sliding frame is rotatably connected to a roller through a rotating shaft, the outer surface of the roller is slidably connected to the inner wall of the second sliding groove, the outer wall of the sliding frame is fixedly connected to the second supporting frame, the inner wall of the second supporting frame is fixedly connected to the hydraulic rod, and the output end of the hydraulic rod is provided with an auxiliary mechanism.

[0008] According to the above technical solution, a second warning light is fixedly connected to the top of the sliding frame, a third sliding groove is provided on the outer wall of the sliding frame on the side close to the second warning light, and a second fixing rod is fixedly connected to the outer wall of the sliding frame on the side away from the second warning light. The bottom of the second fixing rod is consistent with the bottom of the pile body, and can be used to change the contact area between the bottom of the pile body and the ground.

[0009] According to the above technical solution, the inner wall of the sliding frame on the side away from the second warning light is rotatably connected to the first rotating rod via a rotating shaft, the end of the first rotating rod away from the sliding frame is rotatably connected to the first sliding block via a rotating shaft, and the end of the first sliding block away from the first rotating rod is slidably connected to the inner wall of the first sliding groove, and the number of the first sliding blocks is two, and the two first sliding blocks are symmetrically arranged with the central axis of the first rotating rod as the center.

[0010] According to the above technical solution, the auxiliary mechanism includes a second rotating rod rotatably connected to the second fixed rod, the outer wall of the second rotating rod is provided with a second force-bearing plate, the outer wall of the second force-bearing plate is fixedly connected with a protective plate, the top outer wall of the second rotating rod is rotatably connected with a second sliding block through a rotating shaft, the outer surface of the second sliding block is slidably connected to the inner wall of the third sliding groove, and the protective plate plays a buffering role.

[0011] According to the above technical solution, a second fixed shaft is fixedly connected to an outer wall of the second rotating rod on one side close to the second rotating rod, an end of the second fixed shaft away from the second force-bearing plate passes through the second rotating rod and is fixedly connected to a third spring, an end of the third spring close to the second force-bearing plate is fixedly connected to the second rotating rod, the second fixed shaft makes the second force-bearing plate more stable during movement, and the third spring plays a role of buffering and resetting the second force-bearing plate.

[0012] According to the above technical solution, the outer wall of the first supporting frame is fixedly connected to the first connecting rod, the end of the first connecting rod away from the first supporting frame is fixedly connected to the first fixed shaft, the end of the first fixed shaft away from the first connecting rod passes through the second fixed rod and is fixedly connected to the first spring, the outer wall of the first spring on one side close to the first connecting rod is fixedly connected to the second fixed rod, and the first spring is used for the reset function of the sliding frame.

[0013] According to the above technical solution, the inner wall of the fixed block is fixedly connected with a first wire card, a first force-bearing plate is arranged on a side of the fixed block close to the display screen, a connecting shaft is fixedly connected to a side of the first force-bearing plate close to the fixed block, a side of the connecting shaft away from the first force-bearing plate passes through the fixed block, and is fixedly connected with a first fixing rod, when the sliding frame moves toward one side of the pile body, the first force-bearing plate is squeezed by the second warning light, and the first fixed rod squeezes the first wire card through the first force-bearing plate.

[0014] According to the above technical solution, a second spring is fixedly connected to the outer wall of one side of the first force-bearing plate close to the fixed block, an end of the second spring away from the first force-bearing plate is fixedly connected to the fixed block, the first fixing rod is slidably connected to the outer wall of the first line card, and the second spring is used for resetting the first force-bearing plate.

[0015] Compared with the prior art, the present invention provides an anti-collision new energy charging pile, which has the following beneficial effects: 1. The present invention provides an anti-collision new energy charging pile. When the distance between the vehicle and the pile body gradually approaches, the first warning light and the second warning light start to work, flashing lights to warn the vehicle and reminding the driver to keep a safe distance through different colors. If the vehicle continues to approach and the distance to the pile body is too close, the hydraulic rod will respond quickly and pull the protective plate to a suitable position, thereby effectively protecting the pile body, avoiding damage to the pile body caused by vehicle collision, and ensuring the normal use of the charging pile and the structural integrity of the pile body.

[0016] 2. The present invention sets a fixed block. When the vehicle contacts the protective mechanism, the second warning light on the top of the sliding frame is squeezed and acts on the first force-bearing plate, so that the first force-bearing plate pushes the first fixed rod, and then the first fixed rod applies pressure to the first wire clip. The charging gun area of ​​the pile body is clamped and fixed by the first wire clip, which can prevent the charging gun from falling off during the shaking of the pile body.

[0017] 3. The present invention sets a protective mechanism. When the distance between the vehicle and the pile body is too close, the hydraulic rod pulls the second fixed rod to cause the second force-bearing plate to flip at a certain angle. At this time, the protective plate fixedly connected to the outer wall of the second force-bearing plate contacts the vehicle body. During the process of the second force-bearing plate being squeezed, the sliding frame moves toward the second fixed rod under the action of the second force-bearing plate. The contact between the second fixed rod and the ground can increase the contact area between the bottom of the pile body and the ground, thereby improving the stability of the pile body.

[0018] 4. The present invention sets a first rotating rod. During the sliding process of the sliding frame, the sliding frame uses the first rotating rod to prompt the first sliding block to slide along the inner wall of the second connecting rod. At the same time, the first rotating rod supports the back side of the pile body to prevent the pile body from tipping toward the side of the second fixed rod, thereby increasing the collision resistance of the pile body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall front structure of the present invention; Figure 2 It is a schematic diagram of the overall back structure of the present invention; Figure 3 It is a schematic diagram of the supporting mechanism structure of the present invention; Figure 4 For the present invention Figure 2 A schematic diagram of the enlarged structure of B; Figure 5 It is a schematic diagram of the structure of the protection mechanism of the present invention; Figure 6 It is a schematic diagram of the structure of the protection mechanism of the present invention; Figure 7 It is a schematic diagram of the auxiliary mechanism structure of the present invention; Figure 8 For the present invention Figure 1 Schematic diagram of the enlarged structure of A.

[0020] In the figure: 1, support mechanism; 101, pile body; 102, display screen; 103, first warning light; 104, first support frame; 105, first connecting rod; 106, first fixed shaft; 107, first spring; 108, fixed block; 109, first wire clamp; 110, first force plate; 111, first fixed rod; 112, second spring; 113, second wire clamp; 114, second connecting rod; 115, first sliding groove; 116, second sliding groove; 117, connecting rod Connecting shaft; 2, protective mechanism; 201, sliding frame; 202, third sliding groove; 203, second supporting frame; 204, hydraulic rod; 205, second fixed rod; 206, first rotating rod; 207, first sliding block; 208, second warning light; 209, roller; 210, auxiliary mechanism; 2101, second rotating rod; 2102, second force plate; 2103, protective plate; 2104, second fixed shaft; 2105, third spring; 2106, second sliding block. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] 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 to be used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Example 1: See Figure 1-Figure 4 The present invention provides a technical solution: an anti-collision new energy charging pile, including a supporting mechanism 1, the supporting mechanism 1 includes a pile body 101, a first supporting frame 104 is fixedly sleeved on the bottom outer surface of the pile body 101, a second sliding groove 116 is provided on the top of the first supporting frame 104, and the left and right outer walls of the pile body 101 are fixedly connected with fixed blocks 108, a display screen 102 is fixedly connected to the front of the pile body 101, a first warning light 103 is fixedly connected to the outer wall of the pile body 101 on one side close to the display screen 102, a second connecting rod 114 is fixedly connected to the back of the pile body 101, a first sliding groove 115 is provided on the outer surface of the second connecting rod 114, and a second line card 113 is fixedly connected to the outer wall of the pile body 101 on one side close to the fixed block 108, and also includes: The protection mechanism 2 includes a sliding frame 201 arranged outside the pile body 101, and the bottom inner wall of the sliding frame 201 is rotatably connected to a roller 209 through a rotating shaft, and the outer surface of the roller 209 is slidably connected to the inner wall of the second sliding groove 116, and the outer wall of the sliding frame 201 is fixedly connected to the second support frame 203, and the inner wall of the second support frame 203 is fixedly connected to the hydraulic rod 204, and the output end of the hydraulic rod 204 is provided with an auxiliary mechanism 210. When the distance between the vehicle and the pile body 101 gradually approaches, the first warning light 103 and the second warning light 208 start to work, flashing lights to warn the vehicle and reminding the driver to keep a safe distance through different colors. If the vehicle continues to approach, when the distance to the pile body 101 is too close, the hydraulic rod 204 will react quickly and pull the protective plate 2103 to move to a suitable position, thereby effectively protecting the pile body 101, avoiding damage to the pile body 101 caused by vehicle collision, and ensuring the normal use of the charging pile and the structural integrity of the pile body 101.

[0025] The outer wall of the first support frame 104 is fixedly connected to the first connecting rod 105, and the end of the first connecting rod 105 away from the first support frame 104 is fixedly connected to the first fixed shaft 106, and the end of the first fixed shaft 106 away from the first connecting rod 105 passes through the second fixed rod 205 and is fixedly connected to the first spring 107. The outer wall of the first spring 107 on one side close to the first connecting rod 105 is fixedly connected to the second fixed rod 205, and the first spring 107 is used for the reset function of the sliding frame 201.

[0026] A first wire clip 109 is fixedly connected to the inner wall of the fixed block 108, and a first force-bearing plate 110 is arranged on the side of the fixed block 108 close to the display screen 102. A connecting shaft 117 is fixedly connected to the side of the first force-bearing plate 110 close to the fixed block 108. The side of the connecting shaft 117 away from the first force-bearing plate 110 passes through the fixed block 108 and is fixedly connected to a first fixing rod 111. When the vehicle comes into contact with the protective mechanism 2, the second warning light 208 located at the top of the sliding frame 201 is squeezed, and the squeezing force is transmitted to the first force-bearing plate 110, prompting the first force-bearing plate 110 to push the first fixing rod 111, and then the first fixing rod 111 applies pressure to the first wire clip 109. In this way, the first wire clip 109 can clamp and fix the charging gun area of ​​the pile body 101, effectively preventing the charging gun from falling off during the shaking of the pile body 101.

[0027] A second spring 112 is fixedly connected to the outer wall of one side of the first force-bearing plate 110 close to the fixed block 108. The second spring 112 is used for resetting the first force-bearing plate 110. One end of the second spring 112 away from the first force-bearing plate 110 is fixedly connected to the fixed block 108. The first fixed rod 111 is slidably connected to the outer wall of the first line card 109.

[0028] The working principle of this embodiment is as follows: when the vehicle gradually approaches the pile body 101, the first warning light 103 and the second warning light 208 are activated, and flashing lights and different colors are used to warn the driver, reminding him to keep a safe distance. If the vehicle continues to approach and is too close to the pile body 101, the hydraulic rod 204 will respond quickly, pulling the protective plate 2103 to move to a proper position, and effectively protecting the pile body 101, avoiding damage to the pile body 101 caused by vehicle collision, and ensuring the normal use of the charging pile and the integrity of the pile body 101 structure. When the vehicle contacts the protective mechanism 2, the second warning light 208 on the top of the sliding frame 201 is squeezed first, and this squeezing force is transmitted to the first force plate 110, prompting the first force plate 110 to push the first fixing rod 111, and then the first fixing rod 111 applies pressure to the first line clamp 109. In this way, the first line clamp 109 can clamp and fix the charging gun area of ​​the pile body 101, effectively preventing the charging gun from falling off during the shaking of the pile body 101.

[0029] Example 2: Please refer to Figure 5-Figure 8 On the basis of the first embodiment, the present invention provides a technical solution: a second warning light 208 is fixedly connected to the top of the sliding frame 201, a third sliding groove 202 is provided on the outer wall of the sliding frame 201 close to the second warning light 208, a second fixing rod 205 is fixedly connected to the outer wall of the sliding frame 201 away from the second warning light 208, the bottom of the second fixing rod 205 is consistent with the bottom of the pile body 101, and can be used to change the contact area between the bottom of the pile body 101 and the ground. When the distance between the vehicle and the pile body 101 is too close, the hydraulic rod 204 takes effect. , pulling the second fixing rod 205. This action causes the second force-bearing plate 2102 to flip at a certain angle. At this time, the protective plate 2103 fixedly connected to the outer wall of the second force-bearing plate 2102 will contact the vehicle body. During the squeezing of the second force-bearing plate 2102, the sliding frame 201 will move toward the second fixing rod 205 under the action of the second force-bearing plate 2102. Through the contact between the second fixing rod 205 and the ground, the contact area between the bottom of the pile body 101 and the ground can be increased, thereby further improving the stability of the pile body 101.

[0030] The inner wall of the sliding frame 201 on the side away from the second warning light 208 is rotatably connected to the first rotating rod 206 through a rotating shaft, and the end of the first rotating rod 206 away from the sliding frame 201 is rotatably connected to the first sliding block 207 through a rotating shaft. The end of the first sliding block 207 away from the first rotating rod 206 is slidably connected to the inner wall of the first sliding groove 115. When the sliding frame 201 slides, the sliding frame 201 pushes the first sliding block 207 to slide along the inner wall of the second connecting rod 114 through the first rotating rod 206. At the same time, the first rotating rod 206 supports the back side of the pile body 101, thereby preventing the pile body 101 from tipping toward the side of the second fixed rod 205, thereby enhancing the collision resistance of the pile body 101.

[0031] The auxiliary mechanism 210 includes a second rotating rod 2101 rotatably connected to the second fixed rod 205, the outer wall of the second rotating rod 2101 is provided with a second force plate 2102, the outer wall of the second force plate 2102 is fixedly connected with a protective plate 2103, the protective plate 2103 plays a buffering role, the top outer wall of the second rotating rod 2101 is rotatably connected with a second sliding block 2106 through a rotating shaft, and the outer surface of the second sliding block 2106 is slidably connected to the inner wall of the third sliding groove 202.

[0032] A second fixed shaft 2104 is fixedly connected to the outer wall of the second rotating rod 2101 on one side close to the second rotating rod 2101, and an end of the second fixed shaft 2104 away from the second force plate 2102 passes through the second rotating rod 2101 and is fixedly connected to a third spring 2105, and an end of the third spring 2105 close to the second force plate 2102 is fixedly connected to the second rotating rod 2101, and the second fixed shaft 2104 makes the second force plate 2102 more stable during movement, and the third spring 2105 plays a role in buffering and resetting the second force plate 2102.

[0033] The working principle of this embodiment is as follows: when the distance between the vehicle and the pile body 101 is too close, the hydraulic rod 204 pulls the second fixed rod 205. At this time, the second fixed rod 205 causes the bottom of the second rotating rod 2101 to move toward the side of the hydraulic rod 204, thereby pushing the second sliding block 2106 slidably connected to the inner wall of the first sliding groove 115 upward, so that the second force plate 2102 can be flipped. In this way, the contact area between the protective plate 2103 and the vehicle body can be increased. When the protective plate 2103 contacts the vehicle body, the sliding frame 201 will move to the first force plate 2102 under the action of the second force plate 2102. The second fixing rod 205 moves to one side, and the contact area between the bottom of the pile body 101 and the ground can be increased through the contact between the second fixing rod 205 and the ground, thereby further improving the stability of the pile body 101. During the sliding of the sliding frame 201, the sliding frame 201 pushes the first sliding block 207 to slide along the inner wall of the second connecting rod 114 through the first rotating rod 206. At the same time, the first rotating rod 206 supports the back side of the pile body 101 to prevent the pile body 101 from tipping toward the side of the second fixing rod 205, thereby enhancing the collision resistance of the pile body 101.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A collision-proof new energy charging pile, comprising a support mechanism (1), the support mechanism (1) comprising a pile body (101), a first support frame (104) being fixedly sleeved on the bottom outer surface of the pile body (101), a second sliding groove (116) being provided on the top of the first support frame (104), a fixing block (108) being fixedly connected to the left and right outer walls of the pile body (101), a display screen (102) being fixedly connected to the front of the pile body (101), a first warning light (103) being fixedly connected to the outer wall of the pile body (101) on one side close to the display screen (102), a second connecting rod (114) being fixedly connected to the back of the pile body (101), a first sliding groove (115) being provided on the outer surface of the second connecting rod (114), and a second line card (113) being fixedly connected to the outer wall of the pile body (101) on one side close to the fixing block (108), characterized in that: Also included are: The protection mechanism (2) comprises a sliding frame (201) arranged outside the pile body (101), the inner wall of the bottom of the sliding frame (201) being rotatably connected to a roller (209) via a rotating shaft, the outer surface of the roller (209) being slidably connected to the inner wall of a second sliding groove (116), the outer wall of the sliding frame (201) being fixedly connected to a second support frame (203), the inner wall of the second support frame (203) being fixedly connected to a hydraulic rod (204), and the output end of the hydraulic rod (204) being provided with an auxiliary mechanism (210).

2. The anti-collision new energy charging pile according to claim 1, characterized in that: A second warning light (208) is fixedly connected to the top of the sliding frame (201), a third sliding groove (202) is provided on an outer wall of the sliding frame (201) close to the second warning light (208), and a second fixing rod (205) is fixedly connected to an outer wall of the sliding frame (201) away from the second warning light (208).

3. The anti-collision new energy charging pile according to claim 2, characterized in that: An inner wall of a side of the sliding frame (201) away from the second warning light (208) is rotatably connected to a first rotating rod (206) via a rotating shaft, an end of the first rotating rod (206) away from the sliding frame (201) is rotatably connected to a first sliding block (207) via a rotating shaft, and an end of the first sliding block (207) away from the first rotating rod (206) is slidably connected to an inner wall of the first sliding groove (115).

4. The anti-collision new energy charging pile according to claim 1, characterized in that: The auxiliary mechanism (210) comprises a second rotating rod (2101) rotatably connected to the second fixed rod (205); a second force-bearing plate (2102) is provided on the outer wall of the second rotating rod (2101); a protective plate (2103) is fixedly connected to the outer wall of the second force-bearing plate (2102); a second sliding block (2106) is rotatably connected to the top outer wall of the second rotating rod (2101) via a rotating shaft; and an outer surface of the second sliding block (2106) is slidably connected to the inner wall of the third sliding groove (202).

5. The anti-collision new energy charging pile according to claim 4, characterized in that: A second fixed shaft (2104) is fixedly connected to an outer wall of one side of the second rotating rod (2101) close to the second rotating rod (2101); an end of the second fixed shaft (2104) away from the second force-bearing plate (2102) passes through the second rotating rod (2101) and is fixedly connected to a third spring (2105); an end of the third spring (2105) close to the second force-bearing plate (2102) is fixedly connected to the second rotating rod (2101).

6. The anti-collision new energy charging pile according to claim 5, characterized in that: The outer wall of the first support frame (104) is fixedly connected to a first connecting rod (105); one end of the first connecting rod (105) away from the first support frame (104) is fixedly connected to a first fixed shaft (106); one end of the first fixed shaft (106) away from the first connecting rod (105) passes through a second fixed rod (205) and is fixedly connected to a first spring (107); an outer wall of the first spring (107) on one side close to the first connecting rod (105) is fixedly connected to the second fixed rod (205).

7. The anti-collision new energy charging pile according to claim 1, characterized in that: The inner wall of the fixed block (108) is fixedly connected to a first line card (109); a first force plate (110) is provided on a side of the fixed block (108) close to the display screen (102); a connecting shaft (117) is fixedly connected to a side of the first force plate (110) close to the fixed block (108); a side of the connecting shaft (117) away from the first force plate (110) passes through the fixed block (108) and is fixedly connected to a first fixing rod (111).

8. The anti-collision new energy charging pile according to claim 7, characterized in that: A second spring (112) is fixedly connected to an outer wall of one side of the first force-bearing plate (110) close to the fixed block (108); an end of the second spring (112) away from the first force-bearing plate (110) is fixedly connected to the fixed block (108); and the first fixing rod (111) is slidably connected to an outer wall of the first line card (109).

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