A high-precision EMS lifting tool for automotive battery packs

Abstract

This utility model discloses a high-precision EMS lifting device for automotive battery packs, used to connect an EMS lifting scissor fork; a connecting frame, which is floatingly connected to the supporting frame; and a locking assembly, disposed between the supporting frame and the connecting frame, used to lock the connecting frame, limit the floating range of the connecting frame, and prevent the connecting frame from separating from the supporting frame in the horizontal direction. Through the unlocking floating function and the guiding effect of the guide cover, this utility model allows the lifting device to adjust its spatial posture within a certain range, adapting to the positional deviation of the battery pack, achieving high-precision docking, improving the flexibility and adaptability of the lifting device, and effectively solving the problem that existing lifting devices cannot achieve high-precision docking.

Description

Technical Field

[0001] This utility model relates to the field of automotive assembly technology, and in particular to a high-precision EMS lifting tool for automotive battery packs. Background Technology

[0002] EMS (Electric Single Girder Overhead Crane) spreaders are used in the automotive assembly process to move various parts and assemblies between different workstations. For example, after the engine assembly is completed, the car body is lifted to the workstation where it docks with the vehicle body, and then the completed vehicle is lifted to the next process.

[0003] In existing technologies, if there is a positional deviation between the lifting device and the workpiece, manual support is required to align the lifting device with the workpiece; this results in low production efficiency and high labor intensity.

[0004] Therefore, in some situations where the production cycle is fast and the workpiece shape is complex, the EMS lifting tool needs to maintain a certain degree of floating to adapt to changes in the position and orientation of the workpiece. Based on this, the inventor proposes a high-precision EMS lifting tool for automotive battery packs to solve the above problems. Utility Model Content

[0005] To address the aforementioned problems, this invention provides a high-precision EMS lifting tool for automotive battery packs.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A high-precision EMS lifting tool for automotive battery packs includes:

[0008] Support frame, used to connect EMS lifting scissor forks;

[0009] The connecting frame can be floatingly connected to the supporting frame;

[0010] A locking assembly, disposed between the supporting frame and the connecting frame, is used for locking.

[0011] The connecting frame limits the floating range of the connecting frame and prevents the connecting frame from separating from the supporting frame in the horizontal direction;

[0012] The lifting device body is mounted on the connecting frame.

[0013] Further configured as follows: the load-bearing frame includes four vertical frames arranged in a rectangular array. A crossbar is provided between two vertical frames on each side. Multiple connecting blocks are provided on the opposite side of the crossbar. A ball socket is provided on the upper surface of the connecting block. A first sphere is placed inside the ball socket. The first sphere and the ball socket form a ball joint. The first sphere can rotate freely within the ball socket.

[0014] The connection frame is further configured as follows: the connection frame includes two symmetrically arranged portal frames, the two portal frames respectively correspond to the vertical frames on both sides, the inner top wall of the portal frame is fixed with multiple horizontal plates, the multiple horizontal plates respectively abut against the top of the multiple first spheres to form a one-to-one correspondence, and the portal frame forms a rolling contact pair with the first spheres through the horizontal plates.

[0015] The locking assembly is further configured such that: the locking assembly includes an extension plate disposed on the two crossbars, the two extension plates extend toward each other, a connecting hole is provided on the extension side of the extension plate, a connecting rod is disposed between the two portal frames, electric push rods are disposed on both sides of the connecting rod, and the telescopic ends of the two electric push rods are vertically downward and are provided with locking blocks located in the connecting holes.

[0016] The connection hole is further configured in an inverted conical shape, with its diameter gradually increasing from top to bottom, and the locking block fits into the connection hole.

[0017] Further configuration: the bottom of the two portal frames is equipped with a frame for connecting the lifting device body, the side wall of the frame is provided with a downwardly extending mounting bracket, the mounting bracket is provided with a gas spring, the bottom end of the gas spring is equipped with a guide cover, the guide cover includes an inverted trumpet-shaped guide part and a positioning cylinder located on the upper side of the guide part.

[0018] The further configuration includes a battery pack placement plate, on which a positioning pin is provided, and the positioning pin and the positioning cylinder are vertically slidingly engaged.

[0019] The device is further configured to include a damping structure for constraining the floating of the spreader body in the unlocked state.

[0020] Further configured as follows: the damping structure includes a fixed frame installed inside the portal frame, a first cylinder with an open lower surface is provided inside the fixed frame, a slide cylinder with a vertical cross-section of H slides vertically sliding inside the first cylinder, a vertically arranged compression spring is fixed between the upper groove of the slide cylinder and the inner top wall of the first cylinder, a V-shaped tray is provided on the crossbar facing the first cylinder and located below the first cylinder, a second ball is provided in the lower groove of the slide cylinder, and the bottom end of the second ball is pushed into the V-shaped tray by the restoring force of the compression spring.

[0021] The floating range of the lifting device body is further configured to be proportional to the descent height of the locking block, expressed by the formula: D = H · tanα; where D represents the floating range of the lifting device body, H represents the descent height of the locking block, and α represents the cone half-angle of the locking block.

[0022] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0023] 1. High-precision docking: By unlocking the floating function and guiding the guide cover, the spreader can adjust its spatial posture within a certain range to adapt to the positional deviation of the battery pack and achieve high-precision docking. This improves the flexibility and adaptability of the spreader and effectively solves the problem that existing spreaders are difficult to achieve high-precision docking.

[0024] 2. High stability: The locking assembly can reliably fix the connecting frame and the supporting frame after docking, preventing them from floating too much in the horizontal direction and causing them to separate, thus ensuring the stability of the spreader during use. At the same time, the damping structure restrains the floating of the spreader body in the unlocked state, preventing the spreader body from shaking excessively, further improving the stability of the spreader.

[0025] 3. High safety: The gantry frame acts on multiple first spheres through the weight of the connecting frame itself, so that the connecting frame and the supporting frame are closely fitted to form a stable and reliable connection, effectively avoiding the risk of separation between the two in the vertical Z direction, and ensuring the safety of the lifting equipment during use.

[0026] 4. Long service life: The ball joint structure allows the spreader to move freely within a certain range, reducing stress concentration and wear during use and extending the service life of the spreader.

[0027] 5. High degree of automation: The combined use of electric push rods and locking components enables automatic unlocking and locking of the spreader, improving the automation level of the spreader, reducing the workload of operators, and increasing work efficiency. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in 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 utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the upper structure of this utility model;

[0031] Figure 3 for Figure 2 Enlarged diagram of section A in the middle;

[0032] Figure 4 for Figure 1 Enlarged diagram of section B;

[0033] Figure 5 This is a schematic diagram of the locking block in this utility model;

[0034] Figure 6 This is a schematic diagram of the guide cover in this utility model;

[0035] Figure 7 This is a schematic diagram of the damping structure in this utility model;

[0036] Figure 8 This is a cross-sectional view of the damping structure in this utility model.

[0037] Reference numerals: 1. Lifting device body; 2. Vertical frame; 3. Horizontal bar; 4. Connecting block; 5. First sphere; 6. Gantry frame; 7. Horizontal plate; 8. Frame; 9. Extension plate; 10. Connecting hole; 11. Connecting rod; 12. Electric push rod; 13. Locking block; 14. Mounting bracket; 15. Gas spring; 16. Guide cover; 17. Guide part; 18. Positioning cylinder; 19. Fixing bracket; 20. First cylinder; 21. Slide cylinder; 22. Compression spring; 23. V-shaped tray; 24. Second sphere; 25. Fixing rod. Detailed Implementation

[0038] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0039] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] Example

[0042] Reference Figures 1-8 This utility model discloses a high-precision EMS lifting device for automotive battery packs, including a support frame for connecting an EMS lifting scissor fork (not shown in the figure), a connecting frame that can be floated between the support frame and the connecting frame, and a locking component between the support frame and the connecting frame for locking the support frame and the connecting frame, limiting the floating range of the connecting frame and preventing them from floating too much in the horizontal direction and causing them to separate. The connecting frame is equipped with a lifting device body 1 installed by a cylinder. How the lifting device extends and retracts and how the lifting scissor fork rises and falls are conventional technologies in the technical field and will not be described in detail here.

[0043] Specifically, the load-bearing frame includes four vertical frames 2 for connecting the EMS lifting scissor fork, and the four vertical frames 2 are arranged in a rectangular array. A crossbar 3 connected by bolts is provided between two vertical frames 2 on each side. A fixing rod 25 is also provided between the two vertical frames 2. The crossbar 3 and the fixing rod 25 enable the four vertical frames 2 to be connected as one unit. Multiple connecting blocks 4 are provided on the side where the two crossbars 3 are opposite to each other. A ball socket is provided on the upper surface of the connecting block 4. A first ball 5 is provided in the ball socket, and the first ball 5 and the ball socket form a ball pair. The first ball 5 can rotate freely in the ball socket.

[0044] The connecting frame includes two symmetrically arranged portal frames 6, and the two portal frames 6 correspond to two vertical frames 2 respectively. Multiple horizontal plates 7 are fixed on the inner top wall of the portal frames 6, and the multiple horizontal plates 7 abut against the top of multiple first spheres 5 respectively, forming a one-to-one correspondence. The portal frames 6 form a rolling contact pair with the first spheres 5 through the horizontal plates 7.

[0045] The bottom of the two portal frames 6 is bolted to a frame 8 for connecting the lifting device body 1. In this utility model, the weight of the connecting frame is about 1 ton. Therefore, the portal frame 6 acts on multiple first spheres 5 through the weight of the connecting frame itself, so that the connecting frame and the supporting frame are closely fitted together to form a stable and reliable connection, effectively avoiding the risk of separation between the two in the vertical Z direction, and ensuring the stability and safety of the lifting device during use.

[0046] The locking assembly includes extension plates 9 mounted on two crossbars 3. The two extension plates 9 extend towards each other. A connecting hole 10 is provided on the extension side of the extension plate 9. The connecting hole 10 is inverted conical and its diameter gradually increases from top to bottom. A connecting rod 11 is provided between the two portal frames 6. Electric push rods 12 are provided on both sides of the connecting rod 11. The telescopic ends of the two electric push rods 12 are vertically downward and are provided with locking blocks 13 located in and fitting with the connecting holes 10. The connecting holes 10 cover the locking blocks 13.

[0047] When the outer wall of the locking block 13 is fully attached to the inner wall of the connecting hole 10, the gantry 6 and the crossbar 3 are reliably fixed in the horizontal direction and cannot float. When it is necessary to unlock and restore the floating function, the electric push rod 12 drives the locking block 13 to move downward, so that the locking block 13 is disengaged from the inner wall of the connecting hole 10, leaving a gap between them. The gantry 6 can then realize the floating adjustment of its spatial posture through the rolling contact pair between the horizontal plate 7 and the first ball 5, thereby completing the docking of the lifting device and the car battery pack.

[0048] Furthermore, a downwardly extending mounting bracket 14 is provided on the side wall of the frame 8, and a gas spring 15 is provided inside the mounting bracket 14. A guide cover 16 is installed at the bottom of the gas spring 15. The guide cover 16 includes a guide portion 17 configured as an inverted trumpet shape and a positioning cylinder 18 on the upper side of the guide portion 17.

[0049] This utility model also includes a battery pack placement plate (not shown in the figure), on which a positioning pin is provided, and the positioning pin and the positioning cylinder 18 can slide vertically together.

[0050] When the spreader needs to lift a battery pack, it moves above the battery pack, but at this point, the spreader and the battery pack may not be perfectly aligned. In this situation, the spreader's design allows it to achieve high-precision docking through a series of structures and functions.

[0051] First, the lifting device's unlocking and floating function comes into play. The electric push rod 12 drives the locking block 13 downwards, disengaging it from the inner wall of the connecting hole 10. The gantry frame 6 then re-adjusts its horizontal position via the rolling contact pair between the horizontal plate 7 and the first ball 5. This floating adjustment allows the lifting device to move freely within a certain range to accommodate the battery pack's location.

[0052] Next, the lifting device body 1 is driven downward by the cylinder. When the lifting device approaches the battery pack, the positioning pin on the battery pack first contacts the guide part 17. The flared design of the guide part 17 can guide the positioning pin to be smoothly inserted into the positioning cylinder 18. Even if there is a certain positional deviation, the guide part 17 can help the positioning pin to gradually adjust its position and finally accurately insert into the positioning cylinder 18. During this process, the connecting frame adjusts its spatial posture through the rolling contact pair between the horizontal plate 7 and the first ball 5. This adjustment allows the lifting device body 1 installed on the connecting frame to be finely adjusted in the horizontal direction (XY plane) to adapt to the actual position of the battery pack.

[0053] In this embodiment, the floating range of the lifting device body 1 is proportional to the descent height of the locking block 13, and the formula is expressed as: D=H·tanα; where D represents the floating range of the lifting device body 1, H represents the descent height of the locking block 13, and α represents the cone half angle of the locking block 13.

[0054] Furthermore, this invention also includes a damping structure to constrain the floating of the spreader body 1 in the unlocked state. The damping structure provides a certain damping force to prevent arbitrary horizontal floating of the spreader body 1 after unlocking without external force. Instead, the spreader body 1 can only adjust its horizontal displacement relative to the supporting frame when an external force is applied to overcome the damping force. In this way, the stability of the spreader after unlocking is effectively balanced.

[0055] Specifically, the damping structure includes a fixed frame 19 installed inside the portal frame 6, a first cylinder 20 with an open lower surface is provided inside the fixed frame 19, a slide cylinder 21 with a vertical cross section of H slides vertically inside the first cylinder 20, and a vertically arranged compression spring 22 is fixed between the upper groove of the slide cylinder 21 and the inner top wall of the first cylinder 20.

[0056] A V-shaped tray 23 is mounted on the crossbar 3, directly opposite and below the first cylinder 20. A second ball 24 rolls within a groove on the lower side of the slide cylinder 21, with its bottom end pressed against the V-shaped tray 23 by the restoring force of the compression spring 22. When the lifting device is in the unlocked state and no external force is applied, the slide cylinder 21 remains stationary. At this time, the second ball 24 is pressed against the V-shaped tray by the spring force of the compression spring 22. Due to the special shape of the V-shaped tray, there is a certain frictional force between the second ball 24 and the V-shaped tray, which constitutes the damping force.

[0057] When the horizontal adjustment of the spreader body 1 is required to connect the battery pack, an external force is applied to the spreader body 1 and transmitted through the structure of the spreader body 1 to the connecting frame.

[0058] The horizontal displacement of the connecting frame will cause the portal frame 6 to move together, which in turn causes the slide cylinder 21 to slide vertically within the first cylinder 20. The sliding direction of the slide cylinder 21 depends on the direction of horizontal adjustment of the lifting device body 1 and the stress condition of the entire structure.

[0059] If the slide cylinder 21 slides upward, the distance between the upper groove of the slide cylinder 21 and the inner top wall of the first cylinder 20 decreases, and the compression spring 22 is further compressed, increasing the elastic force. At the same time, the second ball 24 in the lower groove of the slide cylinder 21 is subjected to the upward force of the slide cylinder 21 and will be pressed more tightly into the V-shaped tray, further increasing the friction between the second ball 24 and the V-shaped tray.

[0060] If the slide cylinder 21 slides downward, the downward force on the second ball 24 in the groove on the lower side of the slide cylinder 21 decreases. However, due to the restoring force of the compression spring 22, the second ball 24 still remains in contact with the V-shaped tray, only the contact pressure decreases slightly, and the friction will also decrease accordingly.

[0061] During the sliding process of the slide cylinder 21, the sliding friction between the slide cylinder 21 and the first cylinder 20 also changes with the movement of the slide cylinder 21, which generates a certain damping effect on the horizontal adjustment of the spreader body 1. This setting requires the spreader body 1 to overcome a certain resistance when adjusting in the horizontal direction, thereby constraining the horizontal floating of the spreader body 1. Only when the applied external force is large enough to overcome the damping force can the spreader body 1 make horizontal displacement adjustments relative to the supporting frame, ensuring the stability and accuracy of the spreader during docking and preventing excessive swaying of the spreader body 1.

[0062] This invention, through the unlocking floating function and the guiding effect of the guide cover 16, allows the lifting device to adjust its spatial posture within a certain range, adapting to the positional deviation of the battery pack and achieving high-precision docking. This improves the flexibility and adaptability of the lifting device and effectively solves the problem of existing lifting devices being unable to achieve high-precision docking. The locking assembly reliably fixes the connecting frame and the supporting frame after docking, preventing them from floating excessively in the horizontal direction and causing separation, ensuring the stability of the lifting device during use. At the same time, the damping structure constrains the floating of the lifting device body 1 in the unlocked state, preventing excessive shaking of the lifting device body 1, further improving the stability of the lifting device. The gantry frame 6 acts on multiple first spheres 5 through the weight of the connecting frame itself, making the connecting frame and the supporting frame fit tightly together, forming a stable and reliable connection, effectively avoiding the risk of separation between them in the vertical Z direction, and ensuring the safety of the lifting device during use. The ball joint structure allows the lifting device to move freely within a certain range, reducing stress concentration and wear during use and extending the service life of the lifting device.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An EMS high-precision spreader for an automotive battery pack, characterized by, include: Support frame, used to connect EMS lifting scissor forks; The connecting frame can be floatingly connected to the supporting frame; A locking assembly is disposed between the load-bearing frame and the connecting frame to lock the connecting frame, limit the floating range of the connecting frame, and prevent the connecting frame from separating from the load-bearing frame in the horizontal direction. The lifting device body (1) is mounted on the connecting frame.

2. The EMS high-precision spreader for an automotive battery pack according to claim 1, characterized by, The load-bearing frame includes four vertical frames (2), which are arranged in a rectangular array. A crossbar (3) is provided between two vertical frames (2) on each side. Multiple connecting blocks (4) are provided on the opposite side of the crossbar (3). A ball socket is provided on the upper surface of the connecting block (4). A first ball (5) is provided in the ball socket. The first ball (5) and the ball socket form a ball pair. The first ball (5) can rotate freely in the ball socket.

3. The EMS high precision spreader for automotive battery packs of claim 2, wherein, The connecting frame includes two symmetrically arranged portal frames (6), which correspond to the vertical frames (2) on both sides respectively. Multiple horizontal plates (7) are fixed on the inner top wall of the portal frame (6), and the multiple horizontal plates (7) abut against the top of multiple first spheres (5) respectively, forming a one-to-one correspondence. The portal frame (6) forms a rolling contact pair with the first spheres (5) through the horizontal plates (7).

4. The EMS high-precision spreader for an automotive battery pack according to claim 3, characterized by, The locking assembly includes extension plates (9) disposed on the two crossbars (3), the two extension plates (9) extending towards each other, and a connecting hole (10) provided on the extension side of the extension plate (9). A connecting rod (11) is disposed between the two portal frames (6), and electric push rods (12) are disposed on both sides of the connecting rod (11). The telescopic ends of the two electric push rods (12) are vertically downward and are provided with locking blocks (13) located in the connecting hole (10).

5. The EMS high precision spreader for automotive battery packs of claim 3, wherein, The connecting hole (10) is in the shape of an inverted cone, and its diameter gradually increases from top to bottom. The locking block (13) fits into the connecting hole (10).

6. The EMS high precision spreader for automotive battery packs of claim 3, wherein, The bottom of the two portal frames (6) is equipped with a frame (8) for connecting the lifting body (1). The side wall of the frame (8) is provided with a downwardly extending mounting bracket (14). A gas spring (15) is provided inside the mounting bracket (14). A guide cover (16) is installed at the bottom of the gas spring (15). The guide cover (16) includes an inverted trumpet-shaped guide part (17) and a positioning cylinder (18) located on the upper side of the guide part (17).

7. The EMS high precision spreader for automotive battery packs of claim 6, wherein, It also includes a battery pack placement plate, on which a positioning pin is provided, and the positioning pin and the positioning cylinder (18) can slide vertically together.

8. The EMS high precision spreader for automotive battery packs of claim 1, wherein, It also includes a damping structure for constraining the floating of the spreader body (1) in the unlocked state.

9. The EMS high precision spreader for automotive battery packs of claim 8, wherein, The damping structure includes a fixed frame (19) installed inside the portal frame (6). A first cylinder (20) with an open lower surface is provided inside the fixed frame (19). A vertically sliding slide cylinder (21) with an H-shaped vertical cross section is slidably installed inside the first cylinder (20). A vertically arranged compression spring (22) is fixed between the upper groove of the slide cylinder (21) and the inner top wall of the first cylinder (20). A V-shaped tray (23) is provided on the crossbar (3) and is located directly opposite to and below the first cylinder (20). A second ball (24) is provided in the lower groove of the slide cylinder (21). The bottom end of the second ball (24) is pushed into the V-shaped tray (23) by the restoring force of the compression spring (22).

10. The EMS high precision spreader for automotive battery packs of claim 4, wherein, The floating range of the lifting device body (1) is proportional to the descent height of the locking block (13), and the formula is expressed as: D=H·tanα; where D represents the floating range of the lifting device body (1), H represents the descent height of the locking block (13), and α represents the cone half angle of the locking block (13).

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