Battery module hoisting device
By setting multiple lifting devices on the support beam to connect with the two sides and the middle end plate of the module, the problem of flatness difference after module hoisting was solved, and the stability of module flatness and hoisting accuracy were achieved.
Patent Information
- Application Number
- CN202520073812.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-01-13
AI Technical Summary
In the existing technology, the end plate structure on both sides of the hoisting module results in significant differences in the flatness of the module, which cannot meet the design requirements.
The first, second, and third lifting devices installed on the support beam are detachably connected to the two sides and the middle end plate of the module, respectively. Through coordinated lifting, the module as a whole is kept on the same horizontal plane, eliminating the impact of flatness.
The change in flatness dimension of the module before and after hoisting is controlled within 0mm-0.05mm, which meets the design requirements and ensures the stability of flatness after hoisting.
Smart Images
Figure CN223646120U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to battery module hoisting devices. Background Technology
[0002] With the continuous iteration and development of lithium-ion battery product technology, CTP module structure (CTP, Cell To Pack, module-less battery pack structure) is also being innovated. The CTP module has been updated from a two-side end plate structure to a CTP module with end plates on both sides and in the middle.
[0003] Currently, the main method used is to lift CTP modules with side and middle endplate structures using lifting equipment. This involves lifting the side endplates to lower the modules into the housing. However, testing has revealed that the middle endplate of the module may collapse, resulting in poor flatness after installation. The flatness change before and after lifting is approximately 0.4mm-0.85mm, showing a significant difference and failing to meet the product design requirements after lifting. Utility Model Content
[0004] This application provides a battery module hoisting device to solve the problem in the prior art that the two end plates of the hoisting module cause significant differences in the flatness of the module before and after hoisting.
[0005] This application provides a battery module hoisting device. The module has a first end plate, a second end plate, and a third end plate. The first end plate and the second end plate are located on opposite sides of the module, and the third end plate is located in the middle of the module. The hoisting device includes:
[0006] Support beam;
[0007] The first lifting device is mounted on the support beam and is used for detachable connection with the first end plate;
[0008] The second lifting device is mounted on the support beam and is positioned opposite to the first lifting device. It is used for detachable connection with the second end plate.
[0009] The third lifting device is mounted on the support beam, located between the first and second lifting devices, and is used for detachable connection with the third end plate.
[0010] In one possible design, the first lifting device and the second lifting device respectively include:
[0011] The boom has a limit groove.
[0012] A limiting post is provided at the opening of the limiting groove. The side wall of the limiting post is clearance-fitted with the inner wall of the limiting groove. The limiting post has a first end face and a second end face that are arranged opposite to each other.
[0013] The first spring is set in the limiting groove, with one end abutting against the bottom of the limiting groove and the other end abutting against the first end face. The first spring can move the limiting post along the depth direction of the limiting groove by extending and contracting.
[0014] In one possible design, a guide slope is formed on the second end face, and the distance between the guide slope and the first end face gradually decreases from the center of the second end face to the edge of the second end face.
[0015] In one possible design, a protruding ring is formed on the side wall of the limiting post, and a retaining ring is formed at the opening of the limiting groove. The retaining ring prevents the first end face from moving out of the limiting groove by abutting against the protruding ring.
[0016] In one possible design, the third lifting device includes:
[0017] A load-bearing rod is installed on the support beam. A receiving cavity is formed inside the load-bearing rod, and a pin hole communicating with the receiving cavity is opened on the load-bearing rod.
[0018] A pin is inserted into a pin hole. The pin has a first shaft end and a second shaft end that are arranged opposite to each other. A shoulder is formed on the outer wall of the pin.
[0019] The second spring is sleeved on the pin, with one end abutting against the side wall of the receiving cavity and the other end abutting against the shoulder. The second spring can make the second shaft end located in the pin hole by pressing the shoulder.
[0020] The force transmission component is disposed in the receiving cavity and can cause the second shaft end to extend out of the pin hole along the length direction of the pin hole by pressing the first shaft end.
[0021] In one possible design, the force transmission components include:
[0022] A conical wheel is disposed in the receiving cavity. The wheel surface of the conical wheel abuts against the first shaft end. The axial movement of the conical wheel allows the second shaft end to extend out of the pin hole.
[0023] In one possible design, the first shaft end has a spherical surface.
[0024] In one possible design, the support rod has a shaft hole communicating with the receiving cavity, the inner wall of the receiving cavity is fitted with a guide rail, and the force transmission assembly also includes:
[0025] A gear, in which the gear shaft is rotatably mounted in a shaft hole;
[0026] The rack is set in the receiving cavity and slides with the guide rail. The rack meshes with the gear. The end of the rack is connected to the conical wheel. Driven by the gear, the rack can move along the guide rail and drive the conical wheel to move axially.
[0027] In one possible design, a keyway is provided on the gear shaft, and a locking groove is provided on the support rod at the position corresponding to the keyway. The force transmission component also includes a locking pin, which is inserted into the keyway and the locking groove to circumferentially limit the gear.
[0028] In one possible design, the device further includes a first lifting ring and a second lifting ring, which are respectively mounted on the support beam. The first lifting ring is connected to the first lifting device, and the second lifting ring is connected to the second lifting device.
[0029] The beneficial effects of this application are as follows:
[0030] The battery module hoisting device of this application connects the first hoist to the first end plate on the left side of the module, the second hoist to the second end plate on the right side of the module, and the third hoist to the third end plate in the middle of the module during hoisting. By coordinating the first, second, and third hoisting devices, the modules on both sides and in the middle are hoisted, ensuring that the entire module is on the same horizontal plane and eliminating the impact of hoisting on the flatness of the module. The change in the flatness dimension of the module before and after hoisting is controlled between 0mm and 0.05mm, and the flatness of the hoisted module meets the design requirements. Attached Figure Description
[0031] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0032] Figure 1 This is a schematic diagram of the overall structure of the battery module hoisting device provided in the embodiments of this application;
[0033] Figure 2 This is a front view of the battery module hoisting device provided in an embodiment of this application;
[0034] Figure 3 This is a side view of the battery module hoisting device provided in an embodiment of this application;
[0035] Figure 4 This is a schematic diagram of the structure of the first end plate and the second end plate in the embodiments of this application;
[0036] Figure 5 A schematic diagram of the first and second lifting devices of the battery module hoisting device provided in the embodiments of this application;
[0037] Figure 6 This is a schematic diagram of the structure of the third lifting device of the battery module hoisting device provided in the embodiments of this application;
[0038] Figure 7 A schematic diagram of the gear axle end face of the battery module hoisting device provided in this application embodiment.
[0039] Figure label:
[0040] 100. Support beam; 110. Mounting base; 200. First lifting device; 210. Lifting rod; 211. Limiting groove; 212. Retaining ring; 220. Limiting post; 221. First end face; 222. Second end face; 223. Guide slope; 224. Protruding ring; 230. First spring; 300. Second lifting device; 400. Third lifting device; 410. Supporting rod; 411. Receiving cavity; 412. Pin hole; 413. Shaft hole; 420. Pin shaft; 421. First shaft end; 422. Second shaft end; 423. Shaft shoulder; 430. Second spring; 440. Force transmission assembly; 441. Conical wheel; 442. Guide rail; 443. Gear; 444. Rack; 445. Keyway; 446. Locking pin; 510. First lifting ring; 520. Second lifting ring; 610. First end plate; 611. Through hole; 612. Vertical hole; 620. Second end plate; 630. Third end plate; 631. Plate hole. Detailed Implementation
[0041] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0042] The following is combined Figures 1-7 This document describes the battery module hoisting device provided in the embodiments of this application.
[0043] Reference Figure 1As shown in the figure, this application provides a battery module hoisting device for hoisting battery modules. The module has a first end plate 610, a second end plate 620, and a third end plate 630. The first end plate 610 is located on the left side of the module, the second end plate 620 is located on the right side of the module, and the third end plate 630 is located in the middle of the module. The hoisting device includes a support beam 100, a first lifting device 200, a second lifting device 300, and a third lifting device 400. The support beam 100 has a lifting point in its middle section that connects to a hoisting device. Three mounting seats 110 are fixed on the support beam 100, and the three mounting seats 110 are fixed to the lower end of the support beam 100 by welding or bolts. The first lifting device 200, the second end plate 620, the second end plate 620, the third end plate 63 ... The first lifting device 200 and the second lifting device 400 are respectively installed on the corresponding mounting bases 110; the first lifting device 200 is installed on the mounting base 110 on the left side of the support beam 100 and can be detachably connected to the first end plate 610; the second lifting device 300 is installed on the mounting base 110 on the right side of the support beam 100 and is positioned opposite to the first lifting device 200 and can be detachably connected to the second end plate 620; the third lifting device 400 is located on the mounting base 110 in the middle of the support beam 100 and is positioned between the first lifting device 200 and the second lifting device 300, and is used for detachable connection to the third end plate 630.
[0044] Using the technical solution in the above embodiments, the first lifting device 200 is connected to the first end plate 610 on the left side of the module, the second lifting device 300 is connected to the second end plate 620 on the right side of the module, and the third lifting device 400 is connected to the third end plate 630 in the middle of the module. By coordinating the first lifting device 200, the second lifting device 300, and the third lifting device 400, the two sides and the middle of the module are lifted, ensuring that the entire module is on the same horizontal plane, eliminating the impact of lifting on the flatness of the module. The change in the flatness dimension of the module before and after lifting is controlled between 0mm and 0.05mm, and the flatness of the lifted module meets the design requirements.
[0045] In some specific embodiments, the lower ends of the first lifting device 200, the second lifting device 300 and the third lifting device 400 may be provided with hooks, and the first end plate 610, the second end plate 620 and the third end plate 630 may be provided with lugs. During hoisting, the hooks are hung on the lugs to achieve the connection between the first lifting device 200 and the first end plate 610, between the second lifting device 300 and the second end plate 620, and between the third lifting device 400 and the third end plate 630.
[0046] Reference Figure 4As shown, the first end plate 610 and the second end plate 620 each have a vertical hole 612, and through holes 611 communicating with the vertical holes 612 are respectively opened on the outer walls of the first end plate 610 and the second end plate 620. Based on the structure of the first end plate 610 and the second end plate 620, in some specific embodiments, the first lifting device 200 and the second lifting device 300 are connected to the first end plate 610 and the second lifting device 300 by being engaged at the through holes 611. Specifically, refer to Figure 5 As shown, the first lifting device 200 and the second lifting device 300 have the same structure, including a lifting rod 210, a limiting post 220 and a first spring 230, respectively. The lifting rod 210 is vertically arranged, and a limiting groove 211 is opened at the lower end of the lifting rod 210. The opening of the limiting groove 211 faces the side of the lifting rod 210 away from the module. The limiting post 220 is arranged at the opening of the limiting groove 211. The side wall of the limiting post 220 is clearance-fitted with the inner wall of the limiting groove 211. The limiting post 220 has a first end face 221 and a second end face 222 arranged opposite to each other. The first spring 230 is arranged in the limiting groove 211. One end of the first spring 230 abuts against the bottom of the limiting groove 211, and the other end of the first spring 230 abuts against the first end face 221. The first spring 230 can move the limiting post 220 along the depth direction of the limiting groove 211 by extension and retraction. A protruding ring 224 is formed on the side wall of the limiting post 220, and a retaining ring 212 is formed at the opening of the limiting groove 211. The retaining ring 212 prevents the first end face 221 from moving out of the limiting groove 211 by abutting against the protruding ring 224.
[0047] Before hoisting, the lifting rod 210 is moved downward along the vertical hole 612 on the first end plate 610 / second end plate 620. The limiting post 220 is squeezed into the limiting groove 211 by the inner wall of the vertical hole 612. When the limiting post 220 reaches the position of the through hole 611, the first spring 230 pushes the limiting post 220 to slide out along the inner wall of the limiting groove 211, so that the limiting post 220 passes through the through hole 611. Thus, when the lifting rod 210 moves upward, the limiting post 220 located in the through hole 611 can lift the first end plate 610 / second end plate 620. After hoisting is completed, the second end face 222 of the limiting post 220 is manually pressed to make the limiting post 220 retract into the limiting groove 211. At this time, the lifting rod 210 is moved upward to disconnect the limiting post 220 from the first end plate 610 / second end plate 620. In this way, the existing structure of the module can be used to hoist the end plates on both sides of the module without changing the existing module structure.
[0048] Reference Figure 3 , Figure 5As shown, in some specific embodiments, a guiding inclined surface 223 is formed on the second end surface 222 of the limiting post 220. From the center of the second end surface 222 towards the edge of the second end surface 222, the distance between the guiding inclined surface 223 and the first end surface 221 gradually decreases. In this way, it is convenient for the guiding inclined surface 223 to quickly snap into the vertical hole 612 of the first end plate 610 / the second end plate 620.
[0049] Referring to Figure 2 As shown, the third end plate 630 is arranged at the middle position of the module. The third end plate 630 is in a "Ji" shape. A plate hole 631 is provided on the upper end surface of the third end plate 630. Based on the above structure of the third end plate 630, in some specific embodiments, the third lifting tool 400 is connected to the third end plate 630 by being clamped at the plate hole 631. Specifically, referring to Figure 6 As shown, the third lifting tool 400 includes a bearing rod 410, a pin shaft 420, a second spring 430 and a force transmission component 440. The bearing rod 410 is installed on the mounting seat 110 at the middle position of the support beam 100. The bearing rod 410 is vertically arranged. An accommodation cavity 411 is formed inside the bearing rod 410. A pin hole 412 communicating with the accommodation cavity 411 is formed on the bearing rod 410; the pin shaft 420 is inserted into the pin hole 412. The pin shaft 420 has a first shaft end 421 and a second shaft end 422 arranged opposite to each other. A shaft shoulder 423 is formed on the outer wall of the pin shaft 420; the second spring 430 is sleeved on the pin shaft 420. One end of the second spring 430 abuts against the side wall of the accommodation cavity 411, and the other end of the second spring 430 abuts against the shaft shoulder 423. The second spring 430 can make the second shaft end 422 located inside the pin hole 412 by extruding the shaft shoulder 423; the force transmission component 440 is arranged in the accommodation cavity 411 and can make the second shaft end 422 extend out of the pin hole 412 along the length direction of the pin hole 412 by extruding the first shaft end 421; specifically, the force transmission component 440 includes a conical wheel 441. The conical wheel 441 is arranged in the accommodation cavity 411. The wheel surface of the conical wheel 441 is a conical surface. From top to bottom, the diameter of the conical wheel 441 gradually decreases. The wheel surface of the conical wheel 441 abuts against the first shaft end 421. The conical wheel 441 can make the second shaft end 422 extend out of the pin hole 412 by moving axially.
[0050] When the conical wheel 441 moves downward along the axial direction, the diameter of the conical wheel 441 opposite to the first shaft end 421 of the pin 420 increases. Therefore, the conical wheel 441 pushes the first shaft end 421 to move the pin 420 outward, so that the pin 420 can be locked below the plate hole 631. When the support rod 410 moves upward, the pin 420 can lift the third end plate 630. When the conical wheel 441 moves upward along the axial direction, the diameter of the conical wheel 441 opposite to the first shaft end 421 of the pin 420 decreases. At this time, under the elastic action of the second spring 430, the shoulder 423 is pushed to move the pin 420 inward, and the pin 420 retracts into the receiving cavity 411. Moving the support rod 410 upward allows the support rod 410 to be pulled out from the plate hole 631 of the third end plate 630. In this way, the intermediate end plate of the module can be hoisted without changing the existing module structure.
[0051] In some specific embodiments, the first shaft end 421 has a spherical surface, and the first shaft end 421 can slide smoothly on the conical surface by contacting the wheel surface of the conical wheel 441 through the spherical surface.
[0052] In some specific embodiments, the number of pins 420 can be designed to be multiple, for example, two or three, etc. Multiple pins 420 are respectively arranged circumferentially on the load-bearing rod 410, which can improve the stability of hoisting.
[0053] Reference Figure 6 As shown, in some specific embodiments, the support rod 410 has a shaft hole 413 communicating with the receiving cavity 411. A guide rail 442 is installed on the inner wall of the receiving cavity 411. The force transmission assembly 440 also includes a gear 443 and a rack 444. The axle of the gear 443 is rotatably mounted in the shaft hole 413 via a bearing. The rack 444 is disposed in the receiving cavity 411, and the rack 444 slides in engagement with the guide rail 442. The rack 444 meshes with the gear 443, and the end of the rack 444 is connected to a conical wheel 441. Driven by the gear 443, the rack 444 can move along the guide rail 442, thereby driving the conical wheel 441 to move axially. Thus, by rotating the axle of the gear 443, the gear 443 can be rotated, thereby driving the rack 444 and the conical wheel 441 to move up and down.
[0054] Reference Figure 7 As shown, in some specific embodiments, a keyway 445 is provided on the axle of the gear 443, and a locking groove (not shown in the figure) is provided on the support rod 410 at the position corresponding to the keyway 445. The force transmission component 440 also includes a locking pin 446, which is inserted into the keyway 445 and the locking groove to circumferentially limit the gear 443 to prevent the gear 443 from rotating unexpectedly during hoisting.
[0055] Reference Figure 1As shown, in some embodiments of this application, the device further includes a first lifting ring 510 and a second lifting ring 520. The first lifting ring 510 and the second lifting ring 520 are respectively disposed on the support beam 100. The first lifting ring 510 is connected to the first lifting device 200, and the second lifting ring 520 is connected to the second lifting device 300. Specifically, the first lifting ring 510 and the second lifting ring 520 are respectively connected to the corresponding lifting rod 210. In this way, when the lifting rod 210 is inserted into the vertical hole 612, the first lifting ring 510 and the second lifting ring 520 can allow the lifting rod 210 to be slightly tilted, which facilitates the insertion of the lifting rod 210 into the vertical hole 612.
[0056] The workflow of the battery module hoisting device in this application is as follows:
[0057] Before hoisting, insert the support rod 410 into the plate hole 631 of the third end plate 630, rotate the axle of the gear 443 clockwise, so that the gear 443 drives the rack 444 and the conical wheel 441 to move down, and the wheel surface of the conical wheel 441 presses against the first shaft end 421 of the pin 420, so that the second shaft end 422 of the pin 420 extends out of the receiving cavity 411 and is stuck in the plate hole 631;
[0058] Next, insert the lifting rod 210 downwards into the vertical holes 612 of the first end plate 610 and the second end plate 620 respectively. After the limiting post 220 reaches the through hole 611, it pops out under the action of the first spring 230, so that the limiting post 220 is stuck in the through hole 611, and the module can be hoisted, transported and unloaded.
[0059] After hoisting is completed, first press the second end face 222 of the limiting post 220, and at the same time pull up the lifting rod 210 so that the lifting rod 210 is pulled out from the vertical holes 612 of the first end plate 610 and the second end plate 620 respectively; then rotate the axle of the gear 443 counterclockwise so that the gear 443 drives the rack 444 and the conical wheel 441 to move upward, and the second spring 430 will squeeze the shoulder 423 of the pin 420 so that the pin 420 retracts into the receiving cavity 411, and the load-bearing rod 410 can be pulled out from the plate hole 631 of the third end plate 630, and the module is separated from the hoisting device of this application.
[0060] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0062] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0063] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0064] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.
Claims
1. A battery module hoisting device, characterized in that, The module has a first end plate, a second end plate, and a third end plate. The first end plate and the second end plate are located on opposite sides of the module, and the third end plate is located in the middle of the module. The hoisting device includes: Support beam; The first lifting device is mounted on the support beam and is used for detachable connection with the first end plate; The second lifting device is mounted on the support beam and is positioned opposite to the first lifting device, and is used for detachable connection with the second end plate; The third lifting device is mounted on the support beam, located between the first and second lifting devices, and is used for detachable connection with the third end plate.
2. The battery module hoisting device according to claim 1, characterized in that, The first lifting device and the second lifting device each include: The boom has a limit groove. A limiting post is disposed at the opening of the limiting groove, the side wall of the limiting post is clearance-fitted with the inner wall of the limiting groove, and the limiting post has a first end face and a second end face disposed opposite to each other. A first spring is disposed in the limiting groove, with one end abutting against the bottom of the limiting groove and the other end abutting against the first end face. The first spring can cause the limiting post to move along the depth direction of the limiting groove by extending and retracting.
3. The battery module hoisting device according to claim 2, characterized in that: A guide slope is formed on the second end face, and the distance between the guide slope and the first end face gradually decreases from the center of the second end face to the edge of the second end face.
4. The battery module hoisting device according to claim 3, characterized in that: A protruding ring is formed on the side wall of the limiting post, and a retaining ring is formed at the opening of the limiting groove. The retaining ring prevents the first end face from moving out of the limiting groove by abutting against the protruding ring.
5. The battery module hoisting device according to any one of claims 1-4, characterized in that, The third lifting device includes: A load-bearing rod is provided on the support beam, and a receiving cavity is formed inside the load-bearing rod. A pin hole communicating with the receiving cavity is provided on the load-bearing rod. A pin is inserted into the pin hole. The pin has a first shaft end and a second shaft end that are disposed opposite to each other. A shoulder is formed on the outer wall of the pin. The second spring is sleeved on the pin, with one end abutting against the side wall of the receiving cavity and the other end abutting against the shoulder. The second spring can make the second shaft end located in the pin hole by pressing the shoulder. A force transmission component, disposed in the receiving cavity, is capable of causing the second shaft end to extend out of the pin hole along the length direction of the pin hole by pressing the first shaft end.
6. The battery module hoisting device according to claim 5, characterized in that, The force transmission component includes: A conical wheel is disposed in the receiving cavity, the wheel surface of the conical wheel abuts against the first shaft end, and the axial movement of the conical wheel can cause the second shaft end to extend out of the pin hole.
7. The battery module hoisting device according to claim 6, characterized in that: The first shaft end has a spherical surface.
8. The battery module hoisting device according to claim 6, characterized in that, The support rod has a shaft hole communicating with the receiving cavity, and a guide rail is installed on the inner wall of the receiving cavity. The force transmission assembly also includes: A gear, wherein the gear shaft is rotatably mounted in the shaft hole; A rack is disposed in the receiving cavity and slides in cooperation with the guide rail. The rack meshes with the gear. The end of the rack is connected to the conical wheel. Driven by the gear, the rack can move along the guide rail and drive the conical wheel to move axially.
9. The battery module hoisting device according to claim 8, characterized in that: The gear shaft has a keyway, and the load-bearing rod has a locking groove corresponding to the keyway. The force transmission assembly also includes a locking pin, which limits the gear circumferentially by being inserted into the keyway and the locking groove.
10. The battery module hoisting device according to claim 5, characterized in that: It also includes a first lifting ring and a second lifting ring, which are respectively disposed on the support beam. The first lifting ring is connected to the first lifting device, and the second lifting ring is connected to the second lifting device.