Intelligent electric motorcycle adaptive battery protection frame
By employing a quick-installation design with a positioning shell and magnetic plate, along with the buffering function of a buffer layer, the problem of complex installation and insufficient buffering in existing adaptive battery protection frames is solved. This achieves rapid installation and effective buffering, improving battery safety and lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ROTOM MOTORS CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-06-05
AI Technical Summary
Existing adaptive battery protection frames are time-consuming and labor-intensive to install and remove, and cannot effectively buffer external impacts, affecting battery safety and lifespan.
It adopts a combination design of positioning shell, magnetic plate, protective frame, buffer layer and self-adaptive structure, and achieves quick installation and buffer function through magnetic connection, snap-fit and buffer layer cooperation.
It enables quick installation of the protective frame and provides effective cushioning, preventing battery damage from vibration or impact, thus improving installation efficiency and battery safety.
Smart Images

Figure CN224328790U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of battery protection technology, and specifically relates to an adaptive battery protection frame for intelligent electric motorcycles. Background Technology
[0002] Electric motorcycle adaptive battery protection brackets can automatically adapt to the battery size, shape, and installation position, providing stable support and protection for the battery. They are generally used to install and fix the battery, protect the battery safety, and improve the battery's working environment, providing reliable protection for the battery. Some protection brackets also have waterproof and dustproof functions to prevent the battery from malfunctioning due to contact with water or dust.
[0003] Current adaptive battery protection frames require more time and effort to install, and involve complex disassembly and assembly operations using tools. Improper installation can cause the protection frame or adaptive device to malfunction, affecting equipment performance and safety. Furthermore, the lack of cushioning for the battery inside the protection frame means that it cannot effectively absorb and disperse impacts from vibrations, collisions, or other external forces. This results in the battery directly bearing significant external force, leading to battery casing cracking, internal device damage, and ultimately affecting battery performance and lifespan. Utility Model Content
[0004] The purpose of this utility model is to provide an adaptive battery protection frame for intelligent electric motorcycles. Its advantages are that it buffers the battery fixed in the protection frame and allows for quick installation of the protection frame and the adaptive device.
[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an intelligent electric motorcycle adaptive battery protection frame, including a mounting component, wherein the mounting component includes a positioning shell one and a positioning shell two, wherein a lateral adaptive structure is fixedly installed on opposite sides of the positioning shell one and the positioning shell two, and a protective component is fixedly installed on the front and rear sides of the lateral adaptive structure, wherein the protective component includes a protective frame one and a protective frame two, and a height adaptive structure is fixedly installed on both sides of opposite sides of the positioning shell one and the positioning shell two.
[0006] Using the above technical solution: When the user needs to quickly install the protective frame 1 and the protective frame 2 with the lateral adaptive structure, the user pulls the magnetic suction plate out part of the limiting groove. Then, the user engages with the positioning block through the positioning grooves opened in the protective frame 1 and the protective frame 2, and pushes the magnetic suction plate into the limiting groove by driving the protective frame 1 and the protective frame 2. Then, the user welds the fixing plate 1 to the protective frame 1 and the protective frame 2, thereby completing the quick installation of the protective frame 1 and the protective frame 2 with the lateral adaptive structure. When the user needs to buffer the battery fixed in the protective frame, the user adheres the buffer layer to the limiting plate, and pushes the limiting rod into the inner cavity of the fixed shell through the limiting plate. After the limiting rod enters the inner cavity of the fixed shell, the positioning frame moves back and forth through the cooperation of the slot and the damping spring. When the positioning rod is fully entered into the inner cavity of the fixed shell, the battery contacts the buffer layer through the height adaptive device, thereby completing the buffering of the battery fixed in the protective frame.
[0007] The present invention is further configured such that a limiting groove is provided on the opposite side of the positioning shell one and the positioning shell two, and two magnetic suction plates are slidably connected to the inner cavity of the limiting groove. The opposite side of each pair of magnetic suction plates is magnetically connected to the protective frame one and the protective frame two, respectively.
[0008] The above technical solution, through the coordination of positioning shell one, positioning shell two, limiting groove and magnetic suction plate, can fix the position of protective frame one and protective frame two when the user needs to quickly install the protective frame one and protective frame two with the transverse adaptive structure, preventing the position of protective frame one and protective frame two from shifting during installation, and preventing the position from shifting when adjusted by the coordination of dual-axis motor one, threaded rod one and threaded sleeve one in the transverse adaptive structure.
[0009] The present invention is further configured such that a positioning groove is provided on one side of each of the protective frame one and the protective frame two, and a positioning block is engaged in the inner cavity of the positioning groove. The side of the positioning block near the magnetic plate is welded to the magnetic plate.
[0010] The above technical solution is adopted: by setting positioning grooves and positioning blocks, after the first and second protective frames are fixed to the magnetic plate, the positions of the first and second protective frames on the surface of the magnetic plate can be fixed to prevent the first and second protective frames from falling off the magnetic plate during use.
[0011] The present invention is further configured such that the lateral adaptive structure includes a limiting shell one, the top and bottom of the limiting shell one contacting a positioning shell one and a positioning shell two respectively, a dual-axis motor one is fixedly installed in the inner cavity of the limiting shell one, and threaded rods one are fixedly installed at both ends of the dual-axis motor one. The side of the threaded rod one near the inner cavity of the limiting shell one is rotatably connected to the limiting shell, and threaded sleeves one are threadedly connected to the opposite sides of the surfaces of the two threaded rods one. The top of the threaded sleeve one extends through to the outside of the limiting shell one and a fixing plate one is fixedly installed thereon. The opposite sides of the two fixing plates one are fixedly connected to the positioning shell one and the positioning shell two respectively.
[0012] The above technical solution is adopted: by setting up the coordination of the limiting shell 1, dual-axis motor 1, threaded rod 1, threaded sleeve 1 and fixing plate 1 in the horizontal adaptive structure, when the user needs to expand the positioning shell 1 and positioning shell 2, the position of the threaded sleeve 1 can be modified in real time by driving the threaded rod 1 to rotate through the dual-axis motor 1, thereby completing the expansion of positioning shell 1 and positioning shell 2.
[0013] The present invention is further configured such that a retaining shell is fixedly installed on the opposite side of both the first and second protective frames, and five damping springs are fixedly installed on both sides of the inner cavity of the retaining shell. A positioning frame is fixedly connected to the opposite side of every two damping springs, and a limit rod is snapped onto the opposite side of the two positioning frames. A limit plate is welded to the opposite side of the two limit rods.
[0014] The above technical solution allows for the rapid installation of the buffer layer and the inner cavity of the protective frame when the user needs to buffer the battery fixed in the protective frame. It also allows for the rapid replacement of the buffer layer when it is damaged or needs to be replaced.
[0015] The present invention is further configured such that two positioning rods are fixedly installed on opposite sides of the two limiting plates, and the surfaces of each pair of positioning rods are slidably connected to the inner cavities of the first and second protective frames.
[0016] The above technical solution is adopted: by setting a positioning rod, the installation position of the limiting plate in the inner cavity of the first and second protective frames can be limited when the user installs the buffer layer through the limiting plate, so as to facilitate the user to install the buffer layer through the limiting plate.
[0017] The present invention is further configured such that a slot is provided on one side of each of the two limiting rods, and the inner cavity of the slot engages with the surface of the positioning frame.
[0018] The above technical solution allows users to fix the limiting rod using a positioning frame by setting a slot, preventing the limiting rod from shifting its fixed position during use.
[0019] The present invention is further configured such that limit blocks are fixedly connected to both sides of the first protective frame, and the surface of the limit blocks is slidably connected to the inner cavity of the second protective frame.
[0020] By adopting the above technical solution, by setting a limit block, the adjustment position of the first and second protective frames can be positioned when the first and second protective frames are adjusted by the height adaptive device, so as to prevent gaps from forming between the first and second protective frames during use, which would affect the protection effect on the battery.
[0021] The present invention is further configured such that a buffer layer is adhered to one side of each of the two limiting plates, and the side of the two buffer layers closest to the inner cavity of the first and second protective frames is in contact with the inner cavity of the first and second protective frames.
[0022] The above technical solution is adopted: by setting a buffer layer, it is convenient for users to protect the battery in the protective frame one and the protective frame two, and prevent the battery from being damaged due to vibration and collision when the battery is positioned in the protective frame one and the protective frame two.
[0023] The present invention is further configured such that the height adaptive structure includes a limiting shell two, the top and bottom of the limiting shell two contacting the positioning shell one and the positioning shell two respectively, a dual-axis motor two is fixedly installed in the inner cavity of the limiting shell two, and threaded rods two are fixedly installed at both ends of the dual-axis motor two. The side of the threaded rod two near the inner cavity of the limiting shell is rotatably connected to the limiting shell, and threaded sleeves two are threadedly connected to the opposite sides of the surfaces of the two threaded rods two. A fixing plate two is fixedly installed on the side of the threaded sleeve away from the inner wall of the limiting shell, and the opposite sides of the two fixing plates two are fixedly connected to the positioning shell one and the positioning shell two respectively.
[0024] By adopting the above technical solution: through the coordination of the limiting shell 2, dual-axis motor 2, threaded rod 2, threaded sleeve 2 and fixing plate 2 in the height adaptive structure, when the user needs to expand the positioning shell 2 and the positioning shell 2, 1 can drive the threaded rod 2 to rotate and modify the position of the threaded sleeve 2 in real time through the dual-axis motor 2, thereby completing the expansion of the positioning shell 1 and the positioning shell 2.
[0025] In summary, this utility model has the following beneficial effects:
[0026] 1. When the user needs to quickly install the protective frame one and the protective frame two with the transverse adaptive structure, the user will pull the magnetic plate out of the limiting groove. Then, the user will engage the positioning block with the positioning groove opened in the protective frame one and the protective frame two. The user will then push the magnetic plate into the limiting groove by driving the protective frame one and the protective frame two. After that, the user will weld the fixing plate one to the protective frame one and the protective frame two, thereby completing the quick installation of the protective frame one and the protective frame two with the transverse adaptive structure.
[0027] 2. When the user needs to cushion the battery fixed in the protective frame, the user attaches the cushioning layer to the limiting plate, and then pushes the limiting rod into the inner cavity of the fixing shell through the limiting plate. After the limiting rod enters the inner cavity of the fixing shell, it drives the positioning frame to move back and forth through the cooperation of the slot and the damping spring. When the positioning rod is fully inserted into the inner cavity of the fixing shell, the battery contacts the cushioning layer through the height adaptive device, thereby completing the cushioning of the battery fixed in the protective frame. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the overall device of this utility model;
[0029] Figure 2 This is an exploded view of the protective components of this utility model;
[0030] Figure 3 This is a disassembled diagram of the installation components of this utility model;
[0031] Figure 4 This is a utility model Figure 2 Enlarged view of the local structure at point A;
[0032] Figure 5 This is a right sectional view of the lateral adaptive structure of this utility model.
[0033] Figure 6 This is a front sectional view of the height-adaptive structure of this utility model.
[0034] Reference numerals in the attached drawings: 1. Installation components; 101. Positioning shell one; 102. Positioning shell two; 103. Limiting groove; 104. Magnetic suction plate; 105. Positioning groove; 106. Positioning block; 2. Lateral adaptive structure; 201. Limiting shell one; 202. Dual-axis motor one; 203. Threaded rod one; 204. Threaded sleeve one; 205. Fixing plate one; 3. Protective components; 301. Protective frame one; 302. Protective frame two; 303. Fixing shell; 304. Damping spring; 305. Positioning frame; 306. Limiting rod; 307. Limiting plate; 308. Positioning rod; 309. Slot; 310. Limiting block; 311. Buffer layer; 4. Height adaptive structure; 401. Limiting shell two; 402. Dual-axis motor two; 403. Threaded rod two; 404. Threaded sleeve two; 405. Fixing plate two. Detailed Implementation
[0035] The present invention will be further described in detail below with reference to the accompanying drawings.
[0036] Example 1:
[0037] refer to Figure 1 , Figure 3 and Figure 5The intelligent electric motorcycle adaptive battery protection frame includes a mounting component 1, which includes a positioning shell 101 and a positioning shell 2 102. A transverse adaptive structure 2 is fixedly installed on opposite sides of the positioning shell 101 and the positioning shell 2 102.
[0038] Furthermore, positioning shell 101 and positioning shell 2 102 are provided with limiting grooves 103 on opposite sides. The inner cavity of the limiting groove 103 is slidably connected to two magnetic plates 104. The opposite sides of each pair of magnetic plates 104 are magnetically connected to the protective frame 1 301 and the protective frame 2 302 respectively.
[0039] Furthermore, a positioning groove 105 is provided on the opposite side of both the protective frame 1 301 and the protective frame 2 302. A positioning block 406 is engaged in the inner cavity of the positioning groove 105. The side of the positioning block 406 near the magnetic suction plate 104 is welded to the magnetic suction plate 104.
[0040] Furthermore, the lateral adaptive structure 2 includes a limiting shell 201. The top and bottom of the limiting shell 201 are in contact with the positioning shell 101 and the positioning shell 202, respectively. A dual-axis motor 202 is fixedly installed in the inner cavity of the limiting shell 201. Threaded rods 203 are fixedly installed at both ends of the dual-axis motor 202. The side of the threaded rod 203 closest to the inner cavity of the limiting shell is rotatably connected to the limiting shell. Threaded sleeves 204 are threadedly connected to the opposite sides of the surfaces of the two threaded rods 203. The top of the threaded sleeve 204 extends to the outside of the limiting shell 201 and is fixedly installed with a fixing plate 205. The opposite sides of the two fixing plates 205 are fixedly connected to the positioning shell 101 and the positioning shell 202, respectively.
[0041] Brief description of the usage process: When the user needs to quickly install the protective frame 1 301 and the protective frame 2 302 with the transverse adaptive structure 2, the user will pull the magnetic suction plate 104 out of the limiting groove 103. Then, the user will engage the positioning block 406 with the positioning groove 105 opened in the protective frame 1 301 and the protective frame 2 302, and push the magnetic suction plate 104 into the limiting groove 103 by driving the protective frame 1 301 and the protective frame 2 302. Then, the user will attach the fixing plate 1 205 to the protective frame. After welding 301 and 302, the protective frame 301 and 302 are quickly installed with the transverse adaptive structure 2. Through the coordinated arrangement of positioning shell 101, positioning shell 102, limiting groove 103, and magnetic plate 104, the positions of 301 and 302 can be fixed when the user needs to quickly install them with the transverse adaptive structure 2, preventing malfunctions during installation. The position of the protective frame 302 may shift, and its movement may also shift during adjustment via the coordinated action of the dual-axis motor 201, threaded rod 203, and threaded sleeve 204 in the transverse adaptive structure 2. By setting a positioning groove 105 and a positioning block 406, the positions of the protective frame 301 and 302 on the surface of the magnetic plate 104 can be fixed after they are fixed to the magnetic plate 104, preventing them from shifting during use. When positioning shell 101 and positioning shell 202 detach from magnetic plate 104, the lateral adaptive structure 2, through the coordination of limiting shell 101, dual-axis motor 102, threaded rod 103, threaded sleeve 104 and fixing plate 205, can modify the position of threaded sleeve 104 in real time by rotating threaded rod 203 driven by dual-axis motor 102 when the user needs to expand positioning shell 101 and positioning shell 202, thereby completing the expansion of positioning shell 101 and positioning shell 202.
[0042] Example 2:
[0043] refer to Figure 1 , Figure 2 , Figure 4 and Figure 6 The intelligent electric motorcycle adaptive battery protection frame includes a lateral adaptive structure 22. Protective components 3 are fixedly installed on the front and rear sides of the lateral adaptive structure 2. The protective components 3 include a protective frame 1 301 and a protective frame 2 302. A height adaptive structure 4 is fixedly installed on both sides of the opposite side of the positioning shell 1 101 and the positioning shell 2 102.
[0044] Furthermore, a retaining shell 303 is fixedly installed on the opposite side of both the first protective frame 301 and the second protective frame 302. Five damping springs 304 are fixedly installed on both sides of the inner cavity of the retaining shell 303. A positioning frame 305 is fixedly connected to the opposite side of every two damping springs 304. A limit rod 306 is snapped onto the opposite side of the two positioning frames 305. A limit plate 307 is welded to the opposite side of the two limit rods 306.
[0045] Furthermore, two positioning rods 308 are fixedly installed on opposite sides of the two limiting plates 307, and the surfaces of each pair of positioning rods 308 are slidably connected to the inner cavities of the first protective frame 301 and the second protective frame 302.
[0046] Furthermore, each of the two limiting rods 306 has a slot 309 on its opposite side, and the inner cavity of the slot 309 engages with the surface of the positioning frame 305.
[0047] Furthermore, limit blocks 310 are fixedly connected to both sides of the protective frame 301, and the surface of the limit blocks 310 is slidably connected to the inner cavity of the protective frame 302.
[0048] Furthermore, buffer layers 311 are adhered to the opposite sides of the two limiting plates 307, and the side of the two buffer layers 311 that is close to the inner cavity of the first protective frame 301 and the second protective frame 302 is in contact with the inner cavity of the first protective frame 301 and the second protective frame 302.
[0049] Furthermore, the height adaptive structure 4 includes a limiting shell 401. The top and bottom of the limiting shell 402 are in contact with the positioning shell 101 and the positioning shell 102, respectively. A dual-axis motor 402 is fixedly installed in the inner cavity of the limiting shell 401. Threaded rods 403 are fixedly installed at both ends of the dual-axis motor 402. The side of the threaded rod 403 closest to the inner cavity of the limiting shell is rotatably connected to the limiting shell. Threaded sleeves 404 are threadedly connected to the opposite sides of the surfaces of the two threaded rods 403. A fixing plate 405 is fixedly installed on the side of the threaded sleeve away from the inner wall of the limiting shell. The opposite sides of the two fixing plates 405 are fixedly connected to the positioning shell 101 and the positioning shell 102, respectively.
[0050] Brief description of usage: When the user needs to cushion the battery fixed in the protective frame, the user attaches the cushioning layer 311 to the limiting plate 307, and then pushes the limiting rod 306 into the inner cavity of the fixing shell 303 through the limiting plate 307. After the limiting rod 306 enters the inner cavity of the fixing shell 303, it drives the positioning frame 305 to reciprocate through the cooperation of the slot 309 and the damping spring 304. When the positioning rod 308 is fully inserted into the inner cavity of the fixing shell 303, the height adaptive device brings the battery into contact with the cushioning layer 311, thereby completing the cushioning of the battery fixed in the protective frame. By setting the protective frame 301, The coordinated use of the second protective frame 302, the retaining shell 303, the damping spring 304, the positioning frame 305, the limiting rod 306, and the limiting plate 307 allows for quick installation of the buffer layer 311 into the inner cavity of the protective frame when the user needs to cushion the battery fixed in the protective frame. It also allows for quick replacement of the buffer layer 311 if it is damaged or needs to be replaced. The positioning rod 308 limits the installation position of the limiting plate 307 within the inner cavity of the first protective frame 301 and the second protective frame 302 when the user installs the buffer layer 311 using the limiting plate 307, facilitating the user's installation. Plate 307 is used to install the buffer layer 311. A slot 309 is provided to allow the user to fix the limiting rod 306 using the positioning bracket 305, preventing the limiting rod 306 from shifting during use. A limiting block 310 is provided to position the protective brackets 301 and 302 when they are adjusted using the height adaptive device, preventing gaps between them that could affect the battery's protection. The buffer layer 311 facilitates the user's movement when needed. The battery inside the first positioning shell 101 and the second positioning shell 302 is protected to prevent damage to the battery due to vibration or collision when the first positioning shell 101 and the second positioning shell 302 are positioned. By setting the limit shell 2 401, the dual-axis motor 2 402, the threaded rod 2 403, the threaded sleeve 2 404 and the fixing plate 2 405 in the height adaptive structure 4, when the user needs to expand the positioning shell 2 102, the position of the threaded sleeve 2 404 can be modified in real time by rotating the threaded rod 2 403 driven by the dual-axis motor 2, thereby completing the expansion of the positioning shell 101 and the positioning shell 2 102.
[0051] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.
Claims
1. An adaptive battery protection frame for intelligent electric motorcycles, comprising mounting components (1), characterized in that: The mounting assembly (1) includes a positioning shell one (101) and a positioning shell two (102). A lateral adaptive structure (2) is fixedly installed on the opposite side of the positioning shell one (101) and the positioning shell two (102). A protective assembly (3) is fixedly installed on the front and rear sides of the lateral adaptive structure (2). The protective assembly (3) includes a protective frame one (301) and a protective frame two (302). A height adaptive structure (4) is fixedly installed on both sides of the opposite side of the positioning shell one (101) and the positioning shell two (102).
2. The intelligent electric motorcycle adaptive battery protection frame according to claim 1, characterized in that: The positioning shell one (101) and positioning shell two (102) each have a limiting groove (103) on opposite sides. The inner cavity of the limiting groove (103) is slidably connected to two magnetic plates (104). The opposite sides of each pair of magnetic plates (104) are magnetically connected to the protective frame one (301) and the protective frame two (302) respectively.
3. The intelligent electric motorcycle adaptive battery protection frame according to claim 1, characterized in that: The protective frame one (301) and the protective frame two (302) each have a positioning groove (105) on their opposite sides. The positioning groove (105) has a positioning block (406) inserted into its inner cavity. The positioning block (406) is welded to the magnetic suction plate (104) on the side closest to the magnetic suction plate (104).
4. The intelligent electric motorcycle adaptive battery protection frame according to claim 1, characterized in that: The lateral adaptive structure (2) includes a limiting shell one (201). The top and bottom of the limiting shell one (201) are in contact with the positioning shell one (101) and the positioning shell two (102) respectively. A dual-axis motor one (202) is fixedly installed in the inner cavity of the limiting shell one (201). Threaded rod one (203) is fixedly installed at both ends of the dual-axis motor one (202). The side of the threaded rod one (203) near the inner cavity of the limiting shell is rotatably connected to the limiting shell. Threaded sleeve one (204) is threadedly connected to the opposite side of the surfaces of the two threaded rods one (203). The top of the threaded sleeve one (204) extends through to the outside of the limiting shell one (201) and is fixedly installed with a fixing plate one (205). The opposite sides of the two fixing plates one (205) are fixedly connected to the positioning shell one (101) and the positioning shell two (102) respectively.
5. The intelligent electric motorcycle adaptive battery protection frame according to claim 1, characterized in that: On opposite sides of the first protective frame (301) and the second protective frame (302), a retaining shell (303) is fixedly installed. Five damping springs (304) are fixedly installed on both sides of the inner cavity of the retaining shell (303). A positioning frame (305) is fixedly connected to the opposite side of every two damping springs (304). A limit rod (306) is snapped onto the opposite side of the two positioning frames (305). A limit plate (307) is welded to the opposite side of the two limit rods (306).
6. The intelligent electric motorcycle adaptive battery protection frame according to claim 5, characterized in that: Two positioning rods (308) are fixedly installed on opposite sides of the two limiting plates (307), and the surfaces of each pair of positioning rods (308) are slidably connected to the inner cavities of the first protective frame (301) and the second protective frame (302).
7. The intelligent electric motorcycle adaptive battery protection frame according to claim 5, characterized in that: Each of the two limiting rods (306) has a slot (309) on one side opposite to the other, and the inner cavity of the slot (309) engages with the surface of the positioning rod (308).
8. The intelligent electric motorcycle adaptive battery protection frame according to claim 5, characterized in that: Both sides of the first protective frame (301) are fixedly connected to limit blocks (310), and the surface of the limit blocks (310) is slidably connected to the inner cavity of the second protective frame (302).
9. The intelligent electric motorcycle adaptive battery protection frame according to claim 5, characterized in that: The two limiting plates (307) have a buffer layer (311) attached to their opposite sides. The two buffer layers (311) are in contact with the inner cavities of the first protective frame (301) and the second protective frame (302) on the side closest to them.
10. The intelligent electric motorcycle adaptive battery protection frame according to claim 1, characterized in that: The height adaptive structure (4) includes a limiting shell two (401). The top and bottom of the limiting shell two (401) are in contact with the positioning shell one (101) and the positioning shell two (102) respectively. A dual-axis motor two (402) is fixedly installed in the inner cavity of the limiting shell two (401). Threaded rod two (403) is fixedly installed at both ends of the dual-axis motor two (402). The side of the threaded rod two (403) close to the inner cavity of the limiting shell is rotatably connected to the limiting shell. Threaded sleeve two (404) is threadedly connected to the opposite side of the surfaces of the two threaded rod two (403). A fixing plate two (405) is fixedly installed on the side of the threaded sleeve away from the inner wall of the limiting shell. The opposite sides of the two fixing plates two (405) are fixedly connected to the positioning shell one (101) and the positioning shell two (102) respectively.