Lifting device for battery swapping equipment and battery swapping equipment

Abstract

This invention discloses a lifting device and a battery swapping device. The lifting device includes a power unit, a first transmission unit, a second transmission unit, and an execution unit connected in sequence. The power unit outputs a first rotational motion. The first transmission unit converts the first rotational motion into linear motion. The second transmission unit converts the linear motion into a second rotational motion and drives the execution unit to rotate synchronously, thereby driving the lifting platform to rise and fall. Through this lifting device and battery swapping device, the first and second transmission units convert the first rotational motion of the power unit into the second rotational motion of the execution unit, eliminating the need for the power unit to be directly facing the lifting platform, thus making the structural layout of the battery swapping device more convenient and compact. Furthermore, by converting the rotational motion into linear motion through the first transmission unit, the first transmission unit and the power unit can be arranged along a straight line, resulting in a more compact structure.

Description

[0001] This patent application claims priority to Chinese Utility Model Patent Application No. 202220774889.9, filed on April 2, 2022, and Chinese Invention Patent Application No. 202210352075.0, both filed on April 2, 2022. The full text of the aforementioned Chinese patent applications is incorporated herein by reference. Technical Field

[0002] This invention relates to the field of vehicle battery swapping, and particularly to a lifting device and a battery swapping device. Background Technology

[0003] The installation of batteries in existing electric vehicles is generally divided into fixed and swappable types. For swappable batteries, a movable installation method is generally used, which allows the battery to be removed at any time for replacement or charging, and then installed back onto the vehicle body after replacement or charging is completed.

[0004] Existing automated battery swapping equipment is quite tall and has a loose structure, which requires deep recesses on the battery swapping platform to allow the equipment to enter the bottom of the electric vehicle. This significantly increases the construction cost of the battery swapping station. Furthermore, the need to create recesses raises the overall height of the battery swapping platform, increasing the height of the ramps connecting to the platform and reducing the passability of the vehicle.

[0005] Currently, the various transmission structures used in battery swapping equipment are complex and have large spans, resulting in these devices occupying a large space and being prone to interference. Therefore, minimizing the space occupied by the transmission structure has become a key focus for designers in order to reduce the overall height of battery swapping equipment. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome at least one of the problems of existing power swapping equipment with transmission structure occupying a large space and being prone to interference, and to provide a lifting device and power swapping equipment.

[0007] The present invention solves the above-mentioned technical problems through the following technical solution:

[0008] A lifting device for a battery swapping device is used to drive a lifting platform to rise and fall on the device. The lifting platform is used to hold a battery pack. The lifting device includes a power unit, a first transmission unit, a second transmission unit, and an execution unit that are sequentially connected in a transmission manner.

[0009] The power unit is used to output a first rotational motion; the first transmission unit is used to convert the first rotational motion into linear motion; the second transmission unit is used to convert the linear motion into a second rotational motion and drive the execution unit to rotate synchronously, so as to drive the lifting platform to rise and fall.

[0010] In this solution, the aforementioned structural form is adopted. The first rotational motion of the power unit is converted into the second rotational motion of the execution unit via the first and second transmission units. This eliminates the need for the power unit to be directly facing the lifting platform, making the structural layout of the power swapping equipment more convenient and compact. Furthermore, by converting the rotational motion into linear motion via the first transmission unit, the first transmission unit and the power unit can be arranged along a straight line, further enhancing the compactness of the structure.

[0011] Preferably, the rotation axis of the first rotational motion and the direction of the linear motion both extend along one side of the lifting platform, and the rotation axis of the second rotational motion points towards the lifting platform.

[0012] In this solution, the aforementioned structural form is adopted. The first rotational motion of the power unit is converted into a second rotational motion of the execution unit, with the rotation axis of the execution unit designated as the lifting platform. This eliminates the need for the power unit to be directly opposite the lifting platform, allowing for a more flexible layout of the battery swapping equipment. Furthermore, the first and second transmission units extend in the same direction, making them more compact and avoiding interference with other structural aspects of the battery swapping equipment.

[0013] Preferably, the first transmission unit includes a first rotating component and a connecting portion for transmission connection, and the second transmission unit includes a mating portion and a second rotating component for transmission connection.

[0014] The first rotating component is connected to the power unit and rotates under the drive of the power unit, thereby driving the connecting part to move linearly. The connecting part is connected to the mating part and moves the mating part linearly, thereby driving the second rotating component to rotate. The execution unit is connected to the second rotating component and rotates synchronously with the second rotating component.

[0015] or,

[0016] The first transmission unit includes a first rotating component, a first mating part, and a connecting part that are connected in a transmission connection. The first mating part is connected to the first rotating component and can move along the linear motion direction. The second transmission unit includes a mating part and a second rotating component that are connected in a transmission connection.

[0017] The first rotating component is connected to the power unit and rotates under the drive of the power unit. It also drives the connecting part to move linearly through the first mating part. The connecting part is connected to the mating part and drives the mating part to move linearly. It also drives the second rotating component to rotate. The execution unit is connected to the second rotating component and rotates synchronously with the second rotating component.

[0018] In this solution, the above-described structural form is adopted. By setting interconnected and synchronously linearly movable connecting parts and mating parts in the first and second transmission units respectively, and connecting them to the first and second rotating components performing the first rotational motion, the conversion from the first rotational motion to the second rotational motion is realized. Alternatively, the first transmission unit of the above structure can be supplemented with a first mating part, and the conversion from the first rotational motion to linear motion can be realized by adjusting the connection and mating structure between the first mating part and the connecting part. The implementation method is more convenient and simple.

[0019] Preferably, the mating part and / or the first mating part each have a mating part body and a positioning structure formed on the surface of the mating part body and protruding or recessed along a direction different from the linear movement direction;

[0020] The connecting part can contact the positioning structure along the linear motion direction, and / or the connecting part can be clearance-fitted with the positioning structure in a direction perpendicular to the linear motion direction.

[0021] In this design, the concave-convex structure is limited only to the upper limit in the direction of motion. The connecting part moves linearly under the action of the first rotating component. The mating part and / or the first mating part form a positioning structure through a protruding or recessed design, allowing the connecting part to contact the positioning structure and to be positioned above the positioning structure in the direction of linear motion. This ensures that when the connecting part moves linearly, the mating part and / or the first mating part can also move linearly synchronously. By fitting the connecting part with the positioning structure in a clearance fit perpendicular to the linear motion direction, interference with the positioning structure in non-linear motion directions due to contact between the connecting part and the positioning structure can be avoided. This ensures the freedom of the positioning structure in non-linear motion directions and prevents any impact on the traction of the connecting part relative to the mating part and / or the first mating part, resulting in smooth and reliable traction of the connecting part on the mating part and / or the first mating part.

[0022] Preferably, the positioning structure is a protrusion formed on the surface of the mating part body and along a direction different from the linear movement direction;

[0023] The surface of the connecting portion has a recess corresponding to the positioning structure. The positioning structure is at least partially accommodated in the recess, and the inner surface of the recess can contact the positioning structure along the linear movement direction.

[0024] In this design, the concave-convex structure is limited only in the direction of motion. While achieving the transmission effect in the linear motion direction, it does not restrict other directions, providing freedom in other directions and facilitating disassembly, assembly, and adjustment.

[0025] Preferably, along the linear movement direction, the inner surface of the recess is provided with an outwardly penetrating clearance groove. When the positioning structure is accommodated in the recess, the mating part body extends from the side surface of the connecting part through the clearance groove, and the clearance groove is clearance-fitted with the mating part body.

[0026] In this design, the aforementioned structure, with its clearance groove, allows the mating part to be directly placed inside the recess, further increasing the contact area between the positioning structure of the mating part and the recess of the connecting part, thus enhancing its load-bearing capacity. Simultaneously, the mating part can be inserted into or removed from the recess via the clearance groove, facilitating disassembly and adjustment. Furthermore, it avoids interference from the connecting part on the movement of the mating part in non-linear directions due to contact between the mating part and the connecting part, further ensuring the degree of freedom of the mating part in non-linear directions.

[0027] Preferably, along the linear direction of movement, at least one inner surface of the recess has a gap relative to the surface of the positioning structure.

[0028] In this solution, the above-mentioned structure is adopted so that the positioning structure is not completely fixed in the recess. Without affecting the transmission performance, it can be easily installed and removed, and can also be easily rotated or moved in other directions unrelated to linear motion within the recess, making it easy to adjust.

[0029] Preferably, the connecting portion further includes a reinforcing member, the two ends of which are respectively connected to the two ends of the recess along the linear movement direction.

[0030] In this solution, the above structure is adopted. The power element is pulled by the recessed part of the mating part as the force point. The top of the recessed part is connected by additional reinforcing members, which can improve the load-bearing capacity of the recessed part and avoid deformation of the connecting parts due to excessive input load, thus making the transmission more stable.

[0031] Preferably, along the linear direction of movement, the surface of the protrusion that can contact the recess is an arc surface, with the extension direction of the protrusion as the axial direction.

[0032] In this design, the surface of the protrusion that can contact the recess along the linear motion direction adopts an arc surface structure, with the extension direction of the protrusion as the axis direction. This ensures that even if the protrusion and the recess have a certain deviation in the rotation direction around the protrusion axis due to assembly errors, the gap between the protrusion and the recess in the linear motion direction can always remain equal, reducing assembly requirements and ensuring the consistency of transmission between the first mating part and the connecting part, that is, the consistency of transmission between the first rotating part and the connecting part.

[0033] Preferably, the positioning structure of the first mating part is two protrusions, which are disposed on two opposite surfaces of the mating part body and extend away from the surface on which each protrusion is formed on the mating part body;

[0034] Preferably, the two protrusions extend perpendicular to the direction of linear movement, and / or the two protrusions are columnar.

[0035] In this design, the aforementioned positioning structure with two protrusions ensures that both opposite surfaces of the first mating part have protrusions that can drive the connecting part to move, thereby making the transmission between the first mating part and the connecting part more stable. The extension direction of the two protrusions is set perpendicular to the linear motion direction, ensuring that the linear motion of the protrusions is completely unimpeded by their extension direction, forming a reliable motion transmission between the protrusions and the recessed part. The protrusions adopt a columnar structure, with the sides of the columnar structure contacting the recessed part to drive the connecting part to move, and the extension of the columnar protrusions is specifically arranged perpendicular to the linear motion direction.

[0036] Preferably, the protrusion and the recess are in clearance fit along the inner surface perpendicular to the direction of linear motion; preferably, the width of the clearance is less than the distance between the end of the protrusion away from the axis of the first rotational motion and the axis of the first rotational motion.

[0037] In this design, a clearance fit is used between the inner surfaces of the protrusion and the recess along the direction perpendicular to the linear motion. This ensures the degree of freedom between the first mating part and the connecting part in non-linear motion directions (especially perpendicular to the linear motion direction), preventing mutual interference between the first mating part and the connecting part in non-linear motion directions. This makes the transmission between the first rotating component, the first mating part, and the connecting part smoother and more reliable. Furthermore, the width of the clearance is less than the distance between the end of the protrusion away from the axis of the first rotational motion and the axis of the first rotational motion. This prevents the protrusion of the first mating part from over-rotating due to an excessively large clearance, which would affect the linear motion transmission of the protrusion.

[0038] Preferably, the second transmission unit further includes a flexible element, which is connected to the second rotating element to form a flexible transmission mechanism. The mating part is disposed on the flexible element, and the mating part is connected to the second rotating element through the flexible element.

[0039] And / or, the second rotating element is a transmission wheel.

[0040] In this solution, the above structure is adopted. By setting a flexible component to connect the mating part and the second rotating component, the motion of the mating part is converted into the motion of the flexible component and then into the rotation of the second rotating component. The transmission effect is good and the transmission strength is high.

[0041] Preferably, the flexible member has an opening between the second rotating members, the mating part is itself extendable and retractable, the extension and retraction direction is along the linear motion direction, and the two ends of the mating part along its own extension and retraction direction are respectively connected to the two ends of the opening on the flexible member, and the mating part body adjusts the tension of the flexible member by its own extension and retraction.

[0042] In this design, the aforementioned structure is used, with the mating part embedded within the flexible component, enclosing it and ensuring a tight connection, resulting in better transmission performance. The mating part can extend and retract along the linear motion direction, ensuring the flexible component remains taut through this extension and retraction. Furthermore, this structure allows the mating part to simultaneously serve as a power transmission component and a flexible component tension adjustment component, achieving dual functionality in a clever design that makes the drive device more compact and occupies less space.

[0043] Preferably, the mating part includes a mating part body and a tension adjustment structure. The mating part body includes a rod and two adjusting members. The length extension direction of the rod forms the extension and contraction direction of the mating part body itself. The two adjusting members are threaded in opposite directions onto the rod and are spaced apart to form the two ends of the mating part body along its own extension and contraction direction. The extension and contraction of the mating part body is realized by driving the rod to rotate and adjusting the distance between the two adjusting members. The tension adjustment structure is disposed on the surface of the part of the rod that is exposed above the two adjusting members.

[0044] In this solution, the above-mentioned structure is adopted, and the tension of the flexible component is adjusted by the extension and retraction of the mating part itself. This makes the structure of the mating part compact, does not occupy additional space other than the flexible component, and the flexible component will not come into contact with other structures of the power swapping equipment, thus avoiding interference with the movement of the flexible component.

[0045] Preferably, the tension adjustment structure is configured to allow for docking with a rotating tool.

[0046] In this solution, the above-mentioned structure is adopted, and the tension adjustment structure can be connected and rotated using common tools such as wrenches for easy adjustment.

[0047] Preferably, the mating part body further includes a locking member corresponding to the adjusting member, the locking member being threadedly connected to the rod and abutting against the corresponding adjusting member;

[0048] And / or, the two adjusting members are respectively disposed at both ends of the rod;

[0049] And / or, the adjusting member is provided with a connection hole for connecting to the end of the opening.

[0050] In this design, using the aforementioned structure, when the adjusting member rotates to a suitable length to tension the entire flexible member, the locking member can rotate and move towards the adjusting member on the corresponding side to compress and limit the adjusting member, thereby improving the stability after tensioning. The adjusting member is provided with a connecting hole for connecting to the end of the opening, facilitating connection to the end of the flexible member's opening.

[0051] Preferably, the flexible member located between the second rotating members is composed of a first mating section and a second mating section arranged in parallel, and the first mating section and the second mating section are respectively provided with the mating part, and the connecting part is connected through one of the mating parts.

[0052] In this solution, the above structure is adopted. By dividing the flexible component into two mating sections and setting a retractable mating part on each mating section, the synchronous adjustment from the upper and lower sides can avoid unnecessary rotation of the second rotating component caused by unilateral adjustment, and achieve the function of driving the execution unit while ensuring that the second rotating component maintains a fixed angle.

[0053] Preferably, the second transmission unit further includes a rack, the length direction of which is arranged along the linear motion direction, the second rotating member is a gear, the rack meshes with the gear, a portion of the rack forms the mating part, and the mating part is connected to the second rotating member through the rack.

[0054] In this design, the second transmission unit and the second rotating component achieve the transmission from linear motion to rotation through the kinematic engagement of the rack and pinion. By using a portion of the rack as the mating part, eliminating the need for additional mating parts, the connection directly drives the rack and pinion transmission. The rack and pinion transmission maintains constant meshing contact, offering advantages in transmission accuracy, load capacity, and rigidity. It can be used long-term under heavy loads without tension adjustment, making it suitable not only for replacing relatively lightweight passenger car battery packs but also for replacing heavier truck battery packs. Furthermore, compared to sprockets and chains, rack and pinion transmission offers higher accuracy, longer service life, and lower noise. The single-sided meshing transmission structure formed by the rack and pinion occupies less space, allowing the overall battery swapping equipment to be made lower, ensuring sufficient space for swapping larger battery packs from the bottom of the vehicle.

[0055] Preferably, the teeth of the rack forming the mating portion serve as the positioning structure, and the connecting portion is provided with a toothed structure that meshes with the mating portion formed by the rack, so that the connecting portion can contact the positioning structure along the linear motion direction.

[0056] In this solution, the teeth of a portion of the rack are used as a positioning structure. That is, the positioning structure is formed by the concave and convex structure of the rack itself, which achieves a reliable meshing connection with the tooth structure of the connecting part, thereby realizing the connection between the connecting part and the rack and the gear transmission.

[0057] Preferably, a fastener is also connected between the connecting part and the mating part.

[0058] In this solution, fasteners are used to further strengthen the connection between the connecting parts and the mating parts, thereby enhancing the reliability of the transmission.

[0059] Preferably, the second transmission unit further includes a rack guide mechanism, which guides the rack to move along the linear motion direction;

[0060] Preferably, the rack guiding mechanism includes a rack guide rail and a rack guide block that are slidably connected. The rack guide rail is disposed at the bottom of the rack along the length direction of the rack, and the rack guide block is slidably engaged with the rack. More preferably, the rack guide block and the gear are disposed on opposite sides of the rack.

[0061] In this design, a rack guide mechanism guides the rack along a preset linear motion direction, preventing it from deviating from the intended path. A slidably connected rack guide rail and rack guide block achieve a stable linear motion relationship. Positioning the rack guide rail at the bottom of the rack, rather than the top, provides support and smooths its movement. The rack guide blocks and gears are positioned on opposite sides of the rack, creating a clamping effect that keeps them in meshing contact, resulting in smoother transmission and preventing bending moments in the rack.

[0062] Preferably, the first transmission unit further includes a slider, the connecting part is disposed on the slider and moves with the slider, and the first rotating part is connected to the connecting part through the slider;

[0063] Preferably, the first rotating component is a lead screw, and the lead screw and the sliding component form a lead screw pair.

[0064] In this solution, the above-mentioned structure is adopted, and a lead screw pair structure is used to connect with the power unit for transmission. This allows the power unit to achieve the linear motion of the first transmission unit simply by rotating. In this process, the lead screw reduces the speed of the rotational motion of the power unit when it is converted into the linear motion of the sliding part, thereby controlling the lifting speed of the lifting platform.

[0065] Preferably, the first transmission unit further includes a sliding member, the connecting part is disposed on the sliding member and moves with the sliding member, and the first rotating member is connected to the connecting part through the first mating part;

[0066] Preferably, the first rotating component is a lead screw, and the lead screw and the first mating part form a lead screw pair.

[0067] In this design, the connecting part is mounted on the sliding member and moves with it, allowing the connecting part to achieve linear motion through sliding, resulting in smoother movement. This structure separates the sliding of the connecting part from the transmission of the first rotating member and the first mating part, ensuring that the two movements are independent and uninterrupted, thus guaranteeing the smoothness and accuracy of the transmission. The lead screw pair structure, through the first mating part, increases the degree of freedom in the connection, ensuring smooth and reliable transmission.

[0068] Preferably, the power unit includes a motor, and more preferably, the motor is a servo motor;

[0069] And / or, the actuator includes a cam having an extension toward the lifting platform, the extension extending into a groove on the lifting platform and being slidable within the groove.

[0070] In this solution, the aforementioned structure utilizes a high-precision servo motor capable of accurately driving the cam to its designated position for precise lifting. The execution unit includes a cam with an extension that engages with a groove on the lifting platform. The extension is located at the convex end of the cam and is engaged in the horizontally positioned groove. When the cam rotates, the horizontal movement of the cam's convex end is converted into movement of the extension within the groove, thus preventing it from impacting the lifting platform. This ensures the lifting platform is only subjected to the vertical force of the cam. Ultimately, this prevents horizontal movement of the lifting platform, improving the lifting efficiency.

[0071] A battery swapping device, the battery swapping device including the lifting device as described above.

[0072] Preferably, there are two lifting devices, which are respectively located on opposite sides of the lifting platform.

[0073] In this design, the aforementioned structure connects the two lifting devices to the lifting platform, enabling independent operation of each device. This eliminates the need for a transmission mechanism connecting both sides of the lifting platform, resulting in fewer side structures on the battery swapping equipment that do not have lifting devices. This facilitates the installation of the walking mechanism and allows battery transfer equipment (such as forklift or palletizer forks) to be inserted from these sides for battery pack transfer. It also makes the battery swapping equipment more compact.

[0074] Preferably, the battery swapping equipment further includes a traveling frame and a guiding mechanism for moving the battery swapping equipment. The lifting device and the lifting platform are disposed within the traveling frame, and the guiding mechanism is used to assist the lifting platform in lifting and guiding it during the lifting process.

[0075] The guiding mechanism includes a sliding groove on the side of the walking frame in the battery swapping equipment and a slider on the corresponding surface of the lifting platform; preferably, the guiding mechanism includes sliding grooves on the two sides of the walking frame in the battery swapping equipment where the lifting device is not provided and a slider on the corresponding surface of the lifting platform.

[0076] Alternatively, the guiding mechanism includes a first rod assembly and a second rod assembly, each having a movable connecting end for movably connecting to one of the lifting platform and the traveling frame, and a rotating connecting end for rotatably connecting to the other of the lifting platform and the traveling frame. The first rod assembly and the second rod assembly are hinged to each other so that the guiding mechanism extends and retracts along the lifting direction of the lifting platform as the lifting platform rises and falls. Preferably, the guiding mechanism is disposed between at least two opposite sides of the traveling frame and the corresponding surfaces of the lifting platform. More preferably, the guiding mechanism is disposed between four sides of the traveling frame and the corresponding surfaces of the lifting platform.

[0077] In this design, the aforementioned guiding mechanism utilizes sliding grooves and sliders to guide the lifting platform during lifting. By providing sliding grooves and corresponding sliders on both sides, both sides of the lifting platform can be guided, improving the stability and accuracy of the guidance. Furthermore, placing the guiding mechanism and the lifting device on different sides avoids interference between the two, further enhancing the stability of the lifting platform's lifting.

[0078] Alternatively, the aforementioned guiding mechanism can be configured such that the rotating connection ends of the first and second rod assemblies remain fixed to their respective independent components while allowing them to rotate relative to each other; the movable connection end is movably connected to another component, with its connection position changing as the two components move relative to each other. Furthermore, the first and second rod assemblies are rotatably connected to each other, allowing the guiding assembly to extend and retract in the direction of relative movement of the two components, thereby guiding the movement between the two components to be lifted and lowered. Compared to existing guiding mechanisms (such as the aforementioned sliding groove slider), the guiding mechanism of the first and second rod assemblies occupies less space in the direction of movement when retracted, saving space in that direction. Simultaneously, the guiding distance of this mechanism far exceeds the space occupied in its retracted state, ensuring a more compact structure for the two components (i.e., the lifting platform and the traveling frame) in the direction of movement (i.e., the lifting direction) while maintaining the guiding stroke. Providing guiding mechanisms on at least two opposite sides of the power swapping equipment improves the overall stability of the guidance. When the guiding mechanism is installed in the space between the lifting device and the lifting platform, space is fully utilized, resulting in a compact structure. Furthermore, since the guide mechanism composed of two rod assemblies occupies a low height in the retracted state, guide mechanisms can be installed between the four sides of the traveling frame and the corresponding surfaces of the lifting platform (i.e., between the lifting platform and the traveling frame) without interfering with the operation of the power swapping equipment.

[0079] The battery swapping equipment uses the two guiding mechanisms mentioned above to guide the lifting platform, thereby improving the stability of the lifting process.

[0080] The positive and progressive effects of this invention are as follows: This invention discloses a lifting mechanism and a battery swapping device. Through a first transmission unit and a second transmission unit, the first rotational motion of the power unit is converted into the second rotational motion of the execution unit. This eliminates the need for the power unit to be directly facing the lifting platform, making the structural arrangement of the battery swapping device more convenient and compact. Furthermore, by converting the rotational motion into linear motion through the first transmission unit, the first transmission unit and the power unit can be arranged along a straight line, resulting in an even more compact structure. Attached Figure Description

[0081] Figure 1This is a schematic diagram of the battery swapping equipment according to Embodiment 1 of the present invention.

[0082] Figure 2 This is a schematic diagram of the structure of the first transmission unit of the lifting mechanism in Embodiment 1 of the present invention.

[0083] Figure 3 This is a schematic diagram of the structure of the second transmission unit of the lifting mechanism in Embodiment 1 of the present invention.

[0084] Figure 4 This is a schematic diagram of the connecting part and the mating part in Embodiment 1 of the present invention.

[0085] Figure 5 This is a schematic diagram of the sliding member and connecting part in Embodiment 1 of the present invention.

[0086] Figure 6 This is a schematic diagram of the flexible component in Embodiment 1 of the present invention.

[0087] Figure 7 This is a schematic diagram of the mating part in Embodiment 1 of the present invention.

[0088] Figure 8 This is a schematic diagram of the structure of the mating part body in Embodiment 1 of the present invention.

[0089] Figure 9 This is a schematic diagram of the execution unit of Embodiment 1 of the present invention.

[0090] Figure 10 This is a schematic diagram of the cam structure in Embodiment 1 of the present invention.

[0091] Figure 11 This is a schematic diagram of the guiding mechanism of Embodiment 1 of the present invention.

[0092] Figure 12 for Figure 11 Enlarged image.

[0093] Figure 13 This is a schematic diagram of the battery swapping equipment according to Embodiment 2 of the present invention.

[0094] Figure 14 This is a schematic diagram of the internal structure of the battery swapping device according to Embodiment 2 of the present invention.

[0095] Figure 15 for Figure 14 A cross-sectional view along the DD direction.

[0096] Figure 16a for Figure 14 A magnified structural diagram of a local part of H.

[0097] Figure 16b for Figure 15 A magnified view of the structure of part I in the middle.

[0098] Figure 17 for Figure 14 A cross-sectional view along the EE direction.

[0099] Figure 18 for Figure 14 A cross-sectional view along the FF direction.

[0100] Figure 19 for Figure 17 A magnified structural diagram of local J in the middle.

[0101] Explanation of reference numerals in the attached figures:

[0102] Battery swapping equipment 1000, lifting device 100, power unit 101.

[0103] First transmission unit 110, first rotating component 111, sliding component 112, connecting part 113, guide rail 114, recessed part 115, reinforcing component 1151.

[0104] The second transmission unit 120 includes a mating part 121, a mating part body 1211, a positioning structure 1212, a tension adjustment structure 1213, an adjusting member 1214, a locking member 1215, a connecting hole 1216, a second rotating member 122, a flexible member 123, an opening 1231, a first mating section 1232, and a second mating section 1233.

[0105] Actuation unit 130, cam 131, extension 132, slide 133, traveling frame 200, lifting platform 300, guide mechanism 400, sliding groove 401, slider 402.

[0106] Linear motion A, first rotational motion B, second rotational motion C,

[0107] Lifting mounting plate 201, support base 202,

[0108] First mating part 116, mating part body 1161, positioning structure 1162, protrusion 1163.

[0109] Inner surfaces 11511, 11512, 11513; clearance groove 1152; tooth structure 1133; groove 1135; through hole 1136.

[0110] Rack 124, Gear 1242, Rack guide mechanism 125, Rack guide rail 1251, Rack guide block 1252.

[0111] First rod assembly 500, second rod assembly 600, movable connecting end 501, rotating connecting end 502, slide rail 503. Detailed Implementation

[0112] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0113] Example 1

[0114] like Figure 1 As shown, this embodiment provides a battery swapping device 1000. The device 1000 is installed within a battery swapping station and moves between the battery compartment and the electric vehicle within the station. It is responsible for removing batteries from the electric vehicle and transporting them to the battery compartment, or removing batteries from the battery compartment and installing them onto the electric vehicle. During battery swapping, the device 1000 moves directly under the electric vehicle and is lifted to the chassis position via a liftable platform 300. It then completes the removal and installation of the battery pack. This battery swapping device 1000 is suitable not only for passenger cars but also for battery swapping of large vehicles such as trucks, including light and heavy trucks, especially light trucks which have a slightly lower chassis.

[0115] The battery swapping equipment 1000 includes a moving frame 200 and a lifting platform 300 for raising and lowering it to complete the battery swapping operation. The lifting platform 300 is disposed within the moving frame 200 and can be raised and lowered relative to the moving frame 200. The lifting platform 300 is driven by a lifting device 100. Since light trucks and heavy trucks are larger and heavier than other electric vehicles such as cars, their corresponding energy demands are also greater. Therefore, the battery packs for light trucks and heavy trucks are larger and heavier than those for cars. However, the space under the electric vehicle is limited. To allow space for the battery pack, the structure of the battery swapping equipment 1000 in this embodiment, especially the structure of the lifting device 100, is more compact and stronger.

[0116] like Figure 1 As shown, the battery swapping equipment 1000 of this embodiment has two lifting devices 100, which are respectively disposed on two opposite sides of the lifting platform 300. The two lifting devices 100 are connected to the lifting platform 300, allowing each lifting device 100 to operate independently. This eliminates the need for a transmission mechanism connecting the two sides of the lifting platform 300, resulting in fewer side structures on the battery swapping equipment 1000 without the lifting devices 100. This facilitates the installation of the walking mechanism and the transfer of battery packs from these two sides. When transferring battery packs, a battery transfer device (such as a palletizer or forklift forks) is inserted from these two sides to the bottom of the battery pack to transfer it between the battery compartment and the battery swapping equipment, or to transfer problematic battery packs from the battery swapping equipment to outside the swapping station. This also makes the structure of the battery swapping equipment 1000 more compact.

[0117] like Figure 2 , 3As shown, the lifting device 100 of this embodiment is used to be installed on the battery swapping equipment 1000 to drive the lifting platform 300 to rise and fall. The lifting platform 300 is used to hold the battery pack. The lifting device 100 is characterized by including a power unit 101, a first transmission unit 110, a second transmission unit 120, and an execution unit 130 connected in sequence. The power unit 101 outputs a first rotational motion B. The first transmission unit 110 converts the first rotational motion B into linear motion A. The second transmission unit 120 converts the linear motion into a second rotational motion C and drives the execution unit 130 to rotate synchronously, thereby driving the lifting platform 300 to rise and fall.

[0118] In this embodiment, the first rotational motion B output by the power unit 101 is not in the same direction as the second rotational motion C of the execution unit 130. Therefore, in order to realize the lifting and lowering of the lifting platform 300, the first transmission unit 110 and the second transmission unit 120 are set to transmit power to it and change the direction of motion.

[0119] The power unit 101 is not positioned directly opposite the lifting platform 300, which makes the structural layout of the power swapping equipment 1000 more convenient and compact. Furthermore, the rotational motion is converted into linear motion through the first transmission unit 110, and the first transmission unit 110 and the power unit 101 can be arranged along a straight line, making the structure even more compact.

[0120] like Figure 2 As shown, the rotation axis of the first rotational motion B and the motion direction of the linear motion A both extend along one side of the lifting platform 300, while the rotation axis of the second rotational motion C points towards the lifting platform 300.

[0121] The first rotational motion B of the power unit 101 is converted into the second rotational motion C of the execution unit 130 with the rotation axis direction specified as the lifting platform 300 by the first transmission unit 110 and the second transmission unit 120. This makes it possible for the power unit 101 not to be directly facing the lifting platform 300. At the same time, the first transmission unit 110 and the second transmission unit 120 extend in the same direction, which can make them more compact and avoid interference with other directions of the battery swapping equipment 1000 structure, making the structural layout of the battery swapping equipment 1000 more flexible.

[0122] like Figure 2 , 3As shown, the first transmission unit 110 includes a first rotating member 111 and a connecting portion 113 connected by transmission, and the second transmission unit 120 includes a mating portion 121 and a second rotating member 122 connected by transmission. The first rotating member 111 is connected to the power unit 101 by transmission and performs a first rotational motion B under the drive of the power unit 101, and drives the connecting portion 113 to perform a linear motion A. The connecting portion 113 is connected to the mating portion 121, and drives the mating portion 113 to perform a linear motion A, and drives the second rotating member 122 to perform a second rotational motion C. The execution unit 130 is connected to the second rotating member 122 and rotates synchronously with the second rotating member 122.

[0123] In this embodiment, the first rotating component 111 is coaxially connected to the power unit 101 to convert its own rotation into linear motion of the connecting part 113. The first rotating component 111 can be a lead screw, in which case the connecting part 113 cooperates with the lead screw to form a lead screw pair. The first rotating component 111 can also be a gear set consisting of two mutually perpendicular and linked gears, one of which is coaxially arranged with the power unit 101, and the other is connected to the mating part 121 through a transmission belt. In addition to the above two methods, the first rotating component 111 can also be set to other common transmission methods, as long as the axis of the first rotational motion B and the linear motion A are in the same direction.

[0124] The second rotating component 122 operates on the same principle as the first rotating component 111, but with the opposite effect. The second rotating component 122 is coaxially mounted with the execution unit 130, driving the execution unit 130 to synchronously perform the second rotational motion C. The connecting part is connected to the mating part, driving the mating part to move. The mating part can be driven by mechanical structures such as transmission belts, cranks, and connecting rods that can convert linear motion into rotational motion.

[0125] The actuator 130 is connected to the lifting platform 300 through the second rotational motion C. The actuator 130 can be equipped with structures such as a cam 131, crank, and connecting rod to convert rotation into changes in height.

[0126] like Figure 3 , 4 As shown in Figures 7 and 8, the mating part 121 has a mating part body 1211 and a positioning structure 1212 formed on the surface of the mating part body 1211 and protruding or recessed in a direction different from the linear motion direction. The connecting part 113 can contact the positioning structure 1212 in the linear motion direction, and the connecting part 113 has a clearance fit with the positioning structure 1212 in the direction perpendicular to the linear motion direction.

[0127] In this embodiment, the connecting part 113 moves linearly A under the action of the first rotating member 111. The mating part 121 forms a positioning structure 1212 through a protruding or recessed structural design, allowing the connecting part 113 to contact the positioning structure 1212 and its upper limit in the direction of linear motion A to be located at the positioning structure 1212. This ensures that when the connecting part 113 moves linearly A, the mating part 121 can also move linearly A synchronously. By fitting the connecting part 113 with the positioning structure 1212 in a direction perpendicular to linear motion A with a clearance fit, interference with the positioning structure 1212 in directions other than linear motion A due to contact between the connecting part 113 and the positioning structure 1212 can be avoided. This ensures the degree of freedom of the positioning structure 1212 in directions other than linear motion A, thus not affecting the traction of the connecting part 113 relative to the mating part 121, making the traction of the mating part 121 by the connecting part 113 smooth and reliable.

[0128] like Figures 4 to 8 As shown, the positioning structure 1212 is a protrusion formed on the surface of the mating part body 1211 and along a direction different from the linear movement A. The surface of the connecting part 113 has a recess 115 corresponding to the positioning structure 1212. The positioning structure 1212 is at least partially accommodated in the recess 115. Along the linear movement direction, the inner surface of the recess 115 can contact the positioning structure 1212.

[0129] In this embodiment, the mating part 121 and the connecting part 113 are connected together by a concave-convex fit. The protruding positioning structure 1212 of the mating part 121 can be accommodated in the recessed part 115 and is limited by the connecting part 113 in the direction of linear motion A, so that when the connecting part 113 moves, the mating part 121 is engaged in the recessed part 115 and moves synchronously.

[0130] This concave-convex structure is limited only in the direction of motion. While achieving the transmission effect in the linear motion A direction, it does not restrict other directions, providing freedom in other directions and facilitating disassembly, assembly, and adjustment.

[0131] like Figure 5 As shown, along the linear motion direction, an outwardly penetrating relief groove is provided on the inner surface of the recess 115. When the positioning structure 1212 is accommodated in the recess 115, the mating part body 1211 extends from the side surface of the connecting part 113 through the relief groove, and the relief groove and the mating part body 1211 are in clearance fit.

[0132] In this embodiment, the clearance groove is a U-shaped groove with an open top. The length of the mating part body 1211 is greater than the length of the recessed part 115. When the positioning structure 1212 in the middle of the mating part 121 is accommodated in the recessed part 115, both ends of the mating part 121 extend out from the clearance groove.

[0133] By providing a clearance groove, the mating part body 1211 can be directly placed inside the recess 115, further increasing the contact area between the positioning structure 1212 of the mating part body 1211 and the recess 115 of the connecting part 113, thus enhancing its load-bearing capacity. It also prevents interference from the connecting part 113 on the movement of the mating part body 1211 in the non-linear motion A direction due to contact between the mating part body 1211 and the connecting part 113, further ensuring the degree of freedom of the mating part 121 in the non-linear motion A direction. Simultaneously, the mating part body 1211 can also be inserted into or removed from the recess 115 through the clearance groove, facilitating disassembly, assembly, and adjustment.

[0134] like Figure 5 As shown, along the linear motion direction, at least one inner surface of the recess 115 has a gap relative to the surface of the positioning structure 1212.

[0135] In this embodiment, the length of the recess 115 is greater than the length of the protrusion of the positioning structure 1212, so that when the positioning structure 1212 is placed in the recess 115, it is not completely locked inside the recess 115. Instead, there is a gap between the inner surface of the recess 115 and the positioning structure 1212, allowing for a certain degree of freedom in the direction of linear movement A. When the connecting part 113 drives the mating part 121 to move, the positioning structure 1212 acts on one side of the inner side of the recess 115.

[0136] This structure allows the positioning structure 1212 to be not completely fixed within the recess 115, enabling easy installation and removal without affecting transmission performance. It also allows for easy rotation and other unrelated linear motions in the A direction within the recess 115, facilitating adjustments.

[0137] When there is a gap between the inner surface of the recess 115 and the surface of the positioning structure 1212, a detection mechanism (e.g., a Hall sensor and a magnet) can be set up to accurately reflect whether the lifting platform 300 has been raised or lowered into place by detecting the rotational position of the second rotating member 122.

[0138] like Figure 4 As shown, the connecting part 113 also includes a reinforcing member 1151, and the two ends of the reinforcing member 1151 are respectively connected to the two ends of the recessed part 115 along the linear movement direction.

[0139] In this embodiment, there is one reinforcing member 1151, but the number can be adjusted according to needs in other embodiments.

[0140] The power element is pulled by the recessed portion 115 of the mating part 121 as the force point. The additional reinforcing members 1151 are connected to the top of the recessed portion 115, which can improve the load-bearing capacity of the recessed portion 115, avoid deformation of the connecting parts due to excessive input load, and make the transmission more stable.

[0141] like Figure 3 , 6 As shown, the second transmission unit 120 also includes a flexible member 123, which is connected to the second rotating member 122 to form a flexible transmission mechanism. A mating part 121 is disposed on the flexible member 123 and is connected to the second rotating member 122 through the flexible member 123. The second rotating member 122 is a transmission wheel.

[0142] In this embodiment, the second transmission unit 120 converts linear motion A into second rotational motion C through the principle of flexible transmission. When the mating part 121 performs linear motion A, it drives the flexible member 123 to perform linear motion A. The flexible member 123 then drives the second rotating member 122 to perform the second rotational motion C. The flexible member 123 can be a common structure such as a transmission belt or chain, and the second rotating member 122 can also be a common structure such as a transmission wheel or sprocket.

[0143] By setting a flexible member 123 to connect the mating part 121 and the second rotating member 122, the movement of the mating part 121 is converted into the movement of the flexible member 123 and then into the rotation of the second rotating member 122, resulting in good transmission effect and high transmission strength.

[0144] like Figure 6 , 7 As shown, the flexible member 123 has an opening 1231 between the second rotating member 122. The mating part 121 is telescopic, and the telescopic direction is along the linear motion direction. The two ends of the mating part 121 along its own telescopic direction are respectively connected to the two ends of the opening 1231 on the flexible member 123. The mating part body 1211 adjusts the tension of the flexible member 123 by telescopically extending and retracting itself.

[0145] In this embodiment, the flexible member 123 has an opening 1231 for mounting the mating part 121. The two ends of the mating part 121 are respectively connected to the two ends of the opening 1231 of the flexible member 123, and the flexible member 123 is closed. The mating part 121 can extend and retract along the linear motion direction A.

[0146] The mating part 121 is embedded into the flexible member 123, enclosing the flexible member 123 and tightly connecting with it, resulting in better transmission performance. The mating part 121 can extend and retract along the linear motion A direction, ensuring the tension of the flexible member 123 through extension and retraction.

[0147] like Figure 4 , 7As shown, the mating part 121 includes a mating part body 1211 and a tension adjustment structure 1213. The mating part body 1211 includes a rod and two adjusting members 1214. The length extension direction of the rod forms the extension and retraction direction of the mating part body 1211 itself. The two adjusting members 1214 are connected to the rod with reverse threads and are spaced apart to form the two ends of the mating part body 1211 along its own extension and retraction direction. The extension and retraction of the mating part body 1211 is realized by adjusting the distance between the two adjusting members 1214 by driving the rod to rotate. The tension adjustment structure 1213 is provided on the surface of the part of the rod that is exposed above the two adjusting members 1214.

[0148] In this embodiment, the extension and retraction of the mating part 121 is achieved by the tension adjustment structure 1213. The two ends of the rod of the mating part body 1211 have opposite threads, and the two ends are connected to the adjusting members 1214 with opposite threads. The tension adjustment structure 1213 is located in the middle of the rod and is not connected to the adjusting member 1214. It is used to drive the rod to rotate, so that the two ends of the rod can be screwed into or out of the adjusting member 1214 at the same time, thereby reducing or increasing the overall length of the mating part 121.

[0149] The tension adjustment structure 1213 is a protruding structure from the mating part body 1211, and its action causes the mating part body 1211 to rotate. This tension adjustment structure 1213 is the same as the positioning structure 1212 described above, which mates with the recess 115 of the connecting part 113. This component serves both for connection and tension adjustment, making the structure of the mating part 121 compact, without occupying additional space beyond the flexible member 123, and avoiding interference with the movement of the flexible member 123.

[0150] like Figure 4 , 7 As shown, the tension adjustment structure 1213 is configured to allow for docking with a rotating tool.

[0151] In this embodiment, the tension adjustment structure 1213 is a nut-type structure, which can be connected and rotated using common tools such as wrenches for easy adjustment.

[0152] like Figure 4 , 7 As shown, the mating part body 1211 also includes a locking member 1215 corresponding to the adjusting member 1214. The locking member 1215 is threadedly connected to the rod and abuts against the corresponding adjusting member 1214. The two adjusting members 1214 are respectively disposed at both ends of the rod.

[0153] In this embodiment, the rod of the mating part body 1211 also includes a locking member 1215 that is threaded to both ends of the rod. The locking member 1215 is located inside the adjusting member 1214 and is used to limit the adjusting member 1214.

[0154] When the adjusting member 1214 is rotated to a suitable length so that the entire flexible member 123 is tensioned, the locking member 1215 can rotate and move towards the adjusting member 1214 on the corresponding side to squeeze and press against the adjusting member 1214, thereby limiting the adjusting member 1214 and improving the stability after tensioning.

[0155] In other embodiments, the locking element 1215 may be provided only at one end.

[0156] The adjusting member 1214 is provided with a connecting hole 1216 for connecting to the end of the opening 1231. This facilitates connection to the end of the opening 1231 of the flexible member 123.

[0157] In other embodiments, the adjusting member 1214 and the flexible member 123 may also be connected by other detachable connections or by direct fixed connections such as welding.

[0158] like Figure 6 As shown, the flexible member 123 located between the second rotating members 122 is composed of a first mating section 1232 and a second mating section 1233 arranged in parallel. Each of the first mating section 1232 and the second mating section 1233 is provided with a mating part 121, and the connecting part 113 is connected through one of the mating parts 121.

[0159] In this embodiment, the flexible member 123 is divided into a first mating section 1232 and a second mating section 1233, with the connection point with the second rotating member 122 as the boundary. The first mating section 1232 and the second mating section 1233 are arranged in parallel and connected to each other. They respectively mate with the second rotating member 122 on its upper and lower sides. Only the mating part 121 on one of the mating sections needs to mate with the connecting part 113 to achieve the corresponding transmission function.

[0160] The other mating section 121 only serves to adjust the tension of that section. By adjusting synchronously from both the top and bottom, unnecessary rotation of the second rotating member 122 caused by unilateral adjustment can be avoided, ensuring that the second rotating member 122 maintains a fixed angle while driving the actuator 130.

[0161] like Figures 3 to 5 As shown, the first transmission unit 110 also includes a sliding member 112, a connecting part is disposed on the sliding member 112 and moves with the sliding member 112, and a first rotating member 111 is connected to the connecting part through the sliding member 112. The first rotating member 111 is a lead screw, and the lead screw and the sliding member 112 form a lead screw pair.

[0162] In this embodiment, the slider 112 slides via the guide rail 114, which is parallel to the first rotating member 111 and is disposed on both sides of the first rotating member 111.

[0163] By using a lead screw pair structure connected to the power unit 101 for transmission, the power unit 101 can achieve the linear motion of the first transmission unit 110 simply by rotating. In this process, the lead screw can reduce the speed and amplify the power when the rotational motion of the power unit 101 is converted into the linear motion of the slider 112, thereby using a power unit with smaller power and size, and reducing the size of the power unit.

[0164] The power unit 101 includes a motor, which is a servo motor in this embodiment.

[0165] The servo motor has high precision and can accurately drive the cam 131 to rotate into position, achieving precise lifting and lowering.

[0166] like Figure 9 , 10 As shown, the execution unit 130 includes a cam 131. One end of the cam 131 is connected to the rotation shaft of the second rotating member 122 and rotates synchronously with the rotation shaft. The other end of the cam 131 is provided with an extension 132 facing the lifting platform 300. The extension 132 extends into the slide groove 133 provided on the lifting platform 300 and can slide in the slide groove 133.

[0167] The protruding part 132 is located at the protruding end of the cam 131 and is engaged in the horizontally arranged slide groove 133. When the cam 131 rotates, the horizontal movement of the protruding end of the cam 131 is converted into the movement of the protruding part 132 within the slide groove 133, thus preventing it from acting on the lifting platform 300. This ensures that the lifting platform 300 is only subjected to the force in the vertical direction of the cam 131. Ultimately, this avoids horizontal movement of the lifting platform 300 and improves the lifting effect.

[0168] like Figure 11 , 12 As shown, in addition to the lifting device 100 described above, the battery swapping equipment 1000 of this embodiment also includes a guide mechanism 400 to assist the lifting platform 300 in lifting and guiding it during the lifting process. The guide mechanism 400 includes sliding grooves 401 disposed on the two sides of the battery swapping equipment 1000 where the lifting mechanism is not located, and sliders 402 disposed on the corresponding surfaces of the lifting platform 300. The sliding grooves 401 are vertically arranged, and the sliders 402 have their upper limit in the horizontal direction located at the sliding grooves 401 and can slide on the sliding grooves 401 in the vertical direction. When the lifting platform 300 is lifted or lowered, the guide mechanism 400 guides it to ensure that its vertical lifting and lowering does not involve horizontal displacement. Example 2

[0169] This embodiment provides another type of battery swapping device 1000. The main structure of the battery swapping device 1000 in this embodiment is basically the same as that of the battery swapping device 1000 in Embodiment 1, but it provides a lifting device 100 with a different transmission structure and a different lifting guide mechanism 400. The specific differences are as follows:

[0170] like Figure 13-1 As shown in Figure 6, the first transmission unit 110 includes a first rotating member 111 and a connecting part 113 that are connected by transmission, as well as a first mating part 116. The first mating part 116 is connected to the first rotating member 111. The first rotating member 111 is connected by transmission to the power unit 101 and performs a first rotational motion B under the drive of the power unit 101. It also drives the connecting part 113 to perform a linear motion A through the first mating part 116.

[0171] The first rotating component 111 can be a lead screw, but due to the different specific transmission structures, the first mating part 116 is used to form a lead screw pair with the lead screw, and then the first mating part 116 is connected to the connecting part 113. The first mating part 116 has an internal thread, which mates with the external thread of the lead screw. By adjusting the connection and mating structure between the first mating part 116 and the connecting part 113, the conversion from the first rotational motion to linear motion is achieved. The specific mating structure is described below.

[0172] The connecting part 113 in this embodiment differs from the connecting part 113 in Embodiment 1 in terms of specific shape and structure, as detailed below: Figure 14 , 15 and Figure 16a , 16b As shown, the walking frame 200 is provided with a lifting mounting plate 201 for mounting the lifting device 100. The connecting part 113 passes through the lifting mounting plate 201, and its two ends are respectively connected to the first transmission unit 110 and the second transmission unit 120. The connecting part 113 has two recesses 115 on the surface of the connecting part 113 on one side of the first transmission unit 110. Each recess 115 has three inner surfaces 11511, 11512, and 11513, wherein the inner surfaces 11511 and 11512 are inner surfaces along the linear motion A direction, and the inner surface 11513 is an inner surface perpendicular to the linear motion A direction.

[0173] The first mating part 116 includes a mating part body 1161 and a positioning structure 1162 formed on the surface of the mating part body 1161 and protruding or recessed along a direction different from linear movement. In this embodiment, as shown... Figure 15 , Figure 16a and Figure 16bAs shown, the positioning structure consists of two protrusions 1163, which are columnar and formed on opposite sides of the mating body 1161. Each protrusion 1163 extends perpendicular to the linear motion A direction. Each protrusion 1163 corresponds to a recess 115 and is accommodated within the recess 115. Along the linear motion A direction, the two inner surfaces 11511 and 11512 of the recess 115 have a certain gap relative to the surface of the protrusion 1163, allowing the protrusion 1163 to maintain a certain amount of movement space. This allows for convenient installation and removal without affecting transmission performance, and also facilitates rotation and other movements unrelated to the linear motion A within the recess 115. This facilitates adjustment, prevents jamming, and improves the degree of freedom in the transmission connection along the linear motion A direction. When the first mating part 116 is driven to make linear motion, along the linear motion A direction, the protrusion 1163 comes into contact with one of the two inner surfaces 11511 and 11512 of the recess 115, so as to drive the connecting part 113 to move along the linear motion A direction.

[0174] The inner surfaces of the two recesses 115 form outwardly penetrating clearance grooves 1152. The mating part body 1161 is disposed in the clearance grooves 1152 and extends from the side surface of the connecting part 113 through the clearance grooves 1152. The clearance grooves 1152 and the mating part body 1161 are clearance-fitted to avoid interference that may occur during movement. The two recesses 115 are directly placed on the body of the connecting part 113. In other embodiments, a reinforcing member may be added between the two recesses to further strengthen the connection.

[0175] In this embodiment, the positioning structure of the two protrusions 1163 described above is adopted, so that both the upper and lower opposite surfaces of the mating part body 1161 of the first mating part 116 have protrusions 1163 that can drive the connecting part 113 to move, thereby making the transmission between the first mating part 116 and the connecting part 113 more stable. The protrusions 1163 adopt a columnar structure, so that the side of the columnar structure contacts the recessed part 115, driving the connecting part 113 to move, and the extension of the columnar protrusion forms a specific manner perpendicular to the linear motion A direction.

[0176] In other embodiments, the positioning structure 1162 can also adopt other structures that can achieve positioning and transmission effects. For example, the positioning structure can be fitted over the end of the connecting part to achieve positioning and transmission effects. The protrusion 1163 can also be selected from other shapes that can produce positioning and transmission effects, and its number can also be adjusted according to the specific structural shape of the mating part body. The extension direction of the protrusion can also be other than the direction of linear motion. However, compared with other extensions that are not perpendicular to the direction of linear motion, in this embodiment, the extension direction of the two protrusions 1163 is set to be perpendicular to the direction of linear motion A, so that the linear motion of the protrusion 1163 is not hindered by its extension direction, and a reliable motion transmission is formed between the protrusion 1163 and the recess 115.

[0177] like Figure 16a As shown, along the linear motion A direction, the surface where the protrusion 1163 contacts the recess 115 is an arc surface, with the extension direction of the protrusion 1163 as the axial direction. This ensures that even if assembly errors cause a certain deviation between the protrusion 1163 and the recess 115 in the rotational direction around the protrusion axis, the gap between the protrusion 1163 and the recess 115 in the linear motion A direction remains equal, reducing assembly requirements and ensuring the consistency of transmission between the first mating part 116 and the connecting part 113, that is, the consistency of transmission between the first rotating part 111 and the connecting part 113.

[0178] The protrusion 1163 and the recess 115 are fitted with a clearance fit on the inner surface 11513 of the recess along the direction perpendicular to the linear motion A. This ensures the degree of freedom between the protrusion 1163 and the recess 115 in the non-linear motion direction (especially in the direction perpendicular to the linear motion A). It can avoid mutual interference between the first mating part 116 and the connecting part 113 in the non-linear motion direction, thereby making the transmission between the first rotating part 111, the first mating part 116 and the connecting part 113 smoother and more reliable, and improving the degree of freedom of transmission connection in the direction perpendicular to the linear motion A. Meanwhile, to prevent excessive rotation of the protrusion 1163 due to an excessively large gap, which would affect its linear motion transmission, the width of the gap is limited. This gap width is made smaller than the distance between the end of the protrusion 1163 away from the axis of the first rotational motion B and that axis, i.e., the radius of the protrusion 1163 when it rotates 90 degrees. In other words, it does not exceed the maximum change in the radial surface of the protrusion during rotation, thus preventing excessive rotation of the protrusion 1163 due to an excessively large gap, which would affect its linear motion transmission. In other embodiments, the size of the gap between the protrusion 1163 and the inner surface 11513 can be adjusted according to the specific shape, structure, and the needs of the fit.

[0179] like Figure 15 and Figure 16a ,16b As shown, the first transmission unit 110 also includes a slider 112, and a connecting portion 113 is disposed on the slider 112 and moves with the slider 112. More specifically, a portion of the connecting portion 113 is disposed on one side of the slider 112 and connected to the first mating portion 116; the other portion of the connecting portion 113 is disposed on the other side of the slider 112 and passes through 201 to connect with the rack 124. The first rotating member 111 and the first mating portion 116 form a lead screw pair, and the first rotating member 111 is connected to the connecting portion 113 through the first mating portion 116.

[0180] In this embodiment, the slider 112 slides via upper and lower guide rails 114, which are parallel to the first rotating member 111 and positioned on both sides of the first rotating member 111. The connecting part 113 is mounted on the slider 112 and moves with it, allowing the connecting part 113 to achieve linear motion through sliding, resulting in smoother movement. This structure separates the sliding of the connecting part 113 from the transmission of the first rotating member 111 and the first mating part 116, ensuring that the two movements are independent and unaffected by each other, thus guaranteeing the smoothness and accuracy of the transmission. The lead screw pair structure, through the first mating part 116, increases the degree of freedom in the connection, ensuring smooth and reliable transmission.

[0181] like Figure 17-19 As shown, the second transmission unit 120 includes a rack 124 and a second rotating member 122. The second transmission unit 120 is used to convert linear motion into second rotational motion C and drive the execution unit 130 to rotate synchronously to drive the lifting platform 300 to rise and fall. The rotation axis of the second rotational motion C points towards the lifting platform 300.

[0182] Specifically, the connecting part 113 is provided with a tooth structure 1133 on one side of the second transmission unit 120. The tooth structure 1133 is specifically a tooth block. The surface of the tooth structure 1133 has multiple teeth, and the multiple teeth form a recess in the tooth structure 1133 (not shown in the figure). The length direction of the rack 124 is arranged along the linear motion A direction. The part of the rack corresponding to the tooth structure 1133 forms a mating part 121, and the multiple teeth on the surface of the mating part 121 mesh with the multiple teeth on the tooth structure 1133. When the connecting part 113 moves along the linear motion A direction, the meshing tooth structure 1133 and the mating part 121 drive the entire rack 124 to move along the linear motion A direction.

[0183] The second rotating component 122 is a gear 1242, and a rack 124 meshes with the gear 1242. The mating part 121 is connected to the gear 1242 via the rack 124. Through the kinematic engagement of the rack 124 and the gear 1242, the second transmission unit 120 and the second rotating component 122 achieve transmission from linear motion to rotation. By using part of the rack as the mating part 121, without requiring an additional mating part, the connecting part 113 directly drives the rack 124 to connect with the gear. Using gear 1242 and rack 124 for transmission, the gear and rack always maintain meshing contact, offering advantages in transmission accuracy, load capacity, and rigidity. It can be used for extended periods under heavy loads without tension adjustment, making it suitable not only for replacing relatively lightweight passenger car battery packs but also for replacing heavier truck battery packs. Furthermore, compared to sprockets and chains, gears and racks offer higher transmission accuracy, longer service life, and lower noise. The gear and rack form a single-sided meshing transmission structure, which occupies little space, allowing the battery swapping equipment to be made lower overall, ensuring that there is enough space for the battery swapping equipment to swap larger battery packs with the vehicle from the bottom.

[0184] In this embodiment, a portion of the rack teeth is used as a positioning structure, that is, the rack 124 itself forms a positioning structure using its own concave and convex structure, which achieves a reliable meshing connection with the tooth structure 1133 of the connecting part 113, thereby realizing the direct drive of the connecting part 113 to the rack 124 and the gear 1242 transmission connection.

[0185] like Figure 19 As shown, the main body of the connecting part 113 has a groove 1135 on one side of the second transmission unit 120. The tooth structure 1133 is engaged in the groove 1135. The upper surface of the connecting part 113 located in the groove 1135 has two through holes 1136. The two through holes 1136 penetrate the tooth structure 1133 and the corresponding mating part 121. Two bolts pass through the connecting part 113 and the mating part 121 (and nuts that match the bolts can be used) to tightly connect the connecting part 113 and the rack 124, further strengthening the connection strength between the connecting part 113 and the mating part 121.

[0186] like Figure 17 As shown, the second transmission unit 120 also includes a rack guide mechanism 125, which guides the rack 124 to move along the linear motion direction A. The rack guide mechanism 125 includes a rack guide rail 1251 and a rack guide block 1252 that are slidably connected. The rack guide rail 1251 is disposed at the bottom of the rack 124 along the length direction of the rack 124, and the rack guide block 1252 is slidably engaged with the rack 124. The rack guide block 1252 and the gear 1242 are correspondingly disposed on both sides of the rack 124.

[0187] In this embodiment, the rack 124 is guided to move along a preset linear motion direction A by the rack guide mechanism 125, preventing the rack 124 from deviating from the preset direction. A stable linear motion relationship is achieved by using a slidably connected rack guide rail 1251 and rack guide block 1252. The rack guide rail 1251 is positioned at the bottom of the rack, rather than the top, to support the rack 124, ensuring smooth movement. The rack guide block 1252 and gear 1242 are correspondingly positioned on both sides of the rack 124, creating a clamping effect between the relatively stable rack guide block 1252 and gear 1242, ensuring that the rack 124 and gear 1242 maintain meshing contact and resulting in smoother transmission.

[0188] like Figure 13 , 18 As shown, the battery swapping equipment 1000 also includes a guide mechanism 400 to assist the lifting platform 300 in lifting and guiding it during the lifting process.

[0189] The guiding mechanism 400 includes a first rod assembly 500 and a second rod assembly 600. Both the first rod assembly 500 and the second rod assembly 600 have a movable connecting end 501 for movably connecting to one of the lifting platform 300 and the traveling frame 200, and a rotating connecting end 502 for rotatably connecting to the other of the lifting platform 300 and the traveling frame 200. The first rod assembly 500 and the second rod assembly 600 are hinged to each other so that the guiding mechanism 400 extends and retracts in the lifting direction of the lifting platform 300 as the lifting platform 300 rises and falls. The guiding mechanism 400 is disposed on both sides of the power swapping equipment 1000 and is disposed between the lifting device 100 and the lifting platform 300.

[0190] In this embodiment, the guide mechanism is connected to a single, independent component via the rotating connection end 502 of the first rod assembly 500 and the second rod assembly 600, maintaining a constant connection position while allowing relative rotation. The movable connection end 501 is movably connected to the slide rail 503, and its connection position changes with the relative movement of the two components. Furthermore, the first rod assembly 500 and the second rod assembly 600 are rotatably connected to each other, allowing the guide assembly to extend and retract in the direction of relative movement of the two components, thereby guiding the movement between the two components to be lifted (the lifting platform 300 and the support base 202). Compared to existing guide mechanisms (such as the aforementioned sliding groove slider), the guide mechanism of the first and second rod assemblies occupies less space in the direction of movement when retracted, saving space in this direction. Simultaneously, the guiding distance of this mechanism far exceeds the space occupied in its retracted state, ensuring a more compact structure for the two components (i.e., the lifting platform and the traveling frame) in the direction of movement (i.e., the lifting direction) while maintaining the guiding stroke. By providing guide mechanisms 400 on both sides of the power swapping equipment 1000, the overall guiding stability is improved. Furthermore, by utilizing the space between the lifting device 100 and the lifting platform to house the guide mechanisms, space is fully utilized, resulting in a compact structure. It is understood that in other embodiments, since the guide mechanism composed of two rod assemblies occupies a relatively low height in the retracted state, guide mechanisms can be installed between the four sides of the traveling frame and the corresponding surfaces of the lifting platform (i.e., between the lifting platform and the traveling frame) without interfering with the operation of the power swapping equipment.

[0191] Of course, it is understood that the guiding mechanism in this embodiment can also be the guiding mechanism in embodiment 1.

[0192] Example 3

[0193] This embodiment provides another type of battery swapping device. The battery swapping device in this embodiment has a structure that is basically the same as that in Embodiment 1. Its lifting device adopts the same second transmission unit 120 as in Embodiment 1. That is, the connecting part 113 is clearance-fitted with the positioning structure 1212 in the direction perpendicular to the linear motion A. This can avoid interference with the positioning structure 1212 in the non-linear motion A direction due to the contact between the connecting part 113 and the positioning structure 1212, thus ensuring the degree of freedom of the positioning structure 1212 in the non-linear motion A direction. This does not affect the traction of the connecting part 113 relative to the mating part 121, making the traction of the connecting part 113 on the mating part 121 smooth and reliable. That is, it ensures the degree of freedom of the transmission connection of the second transmission unit and realizes smooth and reliable transmission.

[0194] The difference in this embodiment is that the first transmission unit of its lifting device adopts the same first transmission unit 110 as in Embodiment 2. Its first rotating member 111 and the first mating part 116 cooperate to form a lead screw pair, and then the first mating part 116 is connected to the connecting part 113. By adjusting the connection and mating structure between the protrusion 1163 of the first mating part 116 and the recess 115 of the connecting part 113, the degree of freedom of the transmission connection of the first transmission unit 110 is ensured, thereby avoiding interference during transmission and affecting the transmission effect, and achieving smooth and reliable transmission.

[0195] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A lifting device for a battery swapping device, configured to be installed on the battery swapping device to drive a lifting platform to move up and down, the lifting platform being used to hold a battery pack, characterized in that, The lifting device includes a power unit, a first transmission unit, a second transmission unit, and an execution unit connected in sequence: The power unit is used to output a first rotational motion; the first transmission unit is used to convert the first rotational motion into linear motion; the second transmission unit is used to convert the linear motion into a second rotational motion and drive the execution unit to rotate synchronously, so as to drive the lifting platform to rise and fall. The rotation axis of the first rotational motion and the direction of the linear motion both extend along one side of the lifting platform, and the rotation axis of the second rotational motion points towards the lifting platform; The first transmission unit includes a first rotating component and a connecting portion for transmission connection; the second transmission unit includes a mating portion and a second rotating component for transmission connection. The first rotating component is connected to the power unit and rotates under the drive of the power unit, thereby driving the connecting part to move linearly. The connecting part is connected to the mating part and moves the mating part linearly, thereby driving the second rotating component to rotate. The execution unit is connected to the second rotating component and rotates synchronously with the second rotating component. Alternatively, the first transmission unit includes a first rotating component, a first mating part, and a connecting part that are connected in a transmission connection, wherein the first mating part is connected to the first rotating component and can move along the linear motion direction, and the second transmission unit includes a mating part and a second rotating component that are connected in a transmission connection. The first rotating component is connected to the power unit and rotates under the drive of the power unit. It also drives the connecting part to move linearly through the first mating part. The connecting part is connected to the mating part and drives the mating part to move linearly. It also drives the second rotating component to rotate. The execution unit is connected to the second rotating component and rotates synchronously with the second rotating component.

2. The lifting device for the battery swapping equipment as described in claim 1, characterized in that, The mating part and / or the first mating part each have a mating part body and a positioning structure formed on the surface of the mating part body and protruding or recessed along a direction different from the linear movement direction; The connecting part can contact the positioning structure along the linear motion direction, and / or the connecting part can be clearance-fitted with the positioning structure in a direction perpendicular to the linear motion direction.

3. The lifting device for the battery swapping equipment as described in claim 2, characterized in that, The positioning structure is a protrusion formed on the surface of the mating part body and along a direction different from the linear movement direction; the surface of the connecting part has a recessed portion corresponding to the positioning structure, the positioning structure is at least partially accommodated in the recessed portion, and the inner surface of the recessed portion can contact the positioning structure along the linear movement direction.

4. The lifting device for the battery swapping equipment as described in claim 3, characterized in that, Along the linear movement direction, the inner surface of the recess is provided with an outwardly penetrating clearance groove. When the positioning structure is accommodated in the recess, the mating part body extends from the side surface of the connecting part through the clearance groove, and the clearance groove is clearance-fitted with the mating part body.

5. The lifting device for the battery swapping equipment as described in claim 3, characterized in that, Along the linear movement direction, at least one inner surface of the recess has a gap relative to the surface of the positioning structure.

6. The lifting device for the battery swapping equipment as described in claim 3, characterized in that, The connecting part further includes a reinforcing member, the two ends of which are respectively connected to the two ends of the recess along the linear movement direction.

7. The lifting device for the battery swapping equipment as described in claim 3, characterized in that, Along the linear motion direction, the surface of the protrusion that can contact the recess is an arc surface, with the extension direction of the protrusion as the axial direction.

8. The lifting device for the battery swapping equipment as described in claim 3, characterized in that, The positioning structure of the first mating part consists of two protrusions. The two protrusions are disposed on the surfaces of two opposite sides of the mating part body and extend away from the surfaces on which each protrusion is formed on the mating part body.

9. The lifting device for the battery swapping equipment as described in claim 8, characterized in that, The two protrusions extend perpendicular to the direction of linear movement, and / or the two protrusions are columnar.

10. The lifting device for the battery swapping equipment as described in claim 8, characterized in that, The protrusion and the recessed portion are in clearance fit along the inner surface perpendicular to the linear movement direction.

11. The lifting device for the battery swapping equipment as described in claim 10, characterized in that, The width of the gap is less than the distance between the end of the protrusion away from the axis of the first rotational motion and the axis of the first rotational motion.

12. The lifting device for the power swapping equipment as described in any one of claims 1-11, characterized in that, The second transmission unit further includes a flexible component, which is connected to the second rotating component to form a flexible transmission mechanism. The mating part is disposed on the flexible component and is connected to the second rotating component through the flexible component; and / or, the second rotating component is a transmission wheel.

13. The lifting device for the battery swapping equipment as described in claim 12, characterized in that, The flexible member has an opening between the second rotating member. The mating part is telescopic, and the telescopic direction is along the linear motion direction. The two ends of the mating part along its own telescopic direction are respectively connected to the two ends of the opening on the flexible member. The mating part body adjusts the tension of the flexible member by telescopically extending and retracting itself.

14. The lifting device for the battery swapping equipment as described in claim 13, characterized in that, The mating part includes a mating part body and a tension adjustment structure. The mating part body includes a rod and two adjusting members. The length extension direction of the rod forms the extension and contraction direction of the mating part body itself. The two adjusting members are connected to the rod by reverse threads and are spaced apart to form the two ends of the mating part body along its own extension and contraction direction. The extension and contraction of the mating part body is realized by driving the rod to rotate and adjusting the distance between the two adjusting members. The tension adjustment structure is provided on the surface of the part of the rod that is exposed above the two adjusting members.

15. The lifting device for the battery swapping equipment as described in claim 14, characterized in that, The tension adjustment structure is configured to allow for docking with rotating tools.

16. The lifting device for the battery swapping equipment as described in claim 14, characterized in that, The mating part body also includes a locking member corresponding to the adjusting member. The locking member is threadedly connected to the rod and abuts against the corresponding adjusting member. And / or, the two adjusting members are respectively disposed at both ends of the rod; And / or, the adjusting member is provided with a connection hole for connecting to the end of the opening.

17. The lifting device for the battery swapping equipment as described in claim 12, characterized in that, The flexible member located between the second rotating members consists of a first mating section and a second mating section arranged side by side. The first mating section and the second mating section are respectively provided with the mating part, and the connecting part is connected through one of the mating parts.

18. The lifting device for the power swapping equipment as described in any one of claims 1-11, characterized in that, The second transmission unit further includes a rack, the length direction of which is arranged along the linear motion direction, the second rotating component is a gear, the rack meshes with the gear, a portion of the rack forms the mating part, and the mating part is connected to the second rotating component through the rack.

19. The lifting device for the battery swapping equipment as described in claim 18, characterized in that, The teeth of the rack that form the mating part serve as a positioning structure. The connecting part is provided with a toothed structure, which meshes with the mating part formed by the rack so that the connecting part can contact the positioning structure along the linear movement direction.

20. The lifting device for the battery swapping equipment as described in claim 19, characterized in that, Fasteners are also connected between the connecting part and the mating part.

21. The lifting device for the battery swapping equipment as described in claim 18, characterized in that, The second transmission unit further includes a rack guide mechanism, which guides the rack to move along the linear motion direction.

22. The lifting device for the battery swapping equipment as described in claim 21, characterized in that, The rack guide mechanism includes a rack guide rail and a rack guide block that are slidably connected. The rack guide rail is disposed at the bottom of the rack along the length direction of the rack, and the rack guide block is slidably engaged with the rack.

23. The lifting device for the battery swapping equipment as described in claim 22, characterized in that, The rack guide block is disposed on both sides of the rack, corresponding to the gear.

24. The lifting device for the battery swapping equipment as described in claim 1, characterized in that, The first transmission unit further includes a sliding member, and the connecting part is disposed on the sliding member and moves with the sliding member. The first rotating member is connected to the connecting part through the sliding member.

25. The lifting device for the battery swapping equipment as described in claim 24, characterized in that, The first rotating component is a lead screw, and the lead screw and the sliding component form a lead screw pair.

26. The lifting device for the battery swapping equipment as described in claim 1, characterized in that, The first transmission unit further includes a sliding member, the connecting part is disposed on the sliding member and moves with the sliding member, and the first rotating member is connected to the connecting part through the first mating part.

27. The lifting device for the battery swapping equipment as described in claim 26, characterized in that, The first rotating component is a lead screw, and the lead screw and the first mating part form a lead screw pair.

28. The lifting device for the battery swapping equipment as described in claim 1, characterized in that: The power unit includes a motor; And / or, the actuator includes a cam having an extension toward the lifting platform, the extension extending into a groove on the lifting platform and being slidable within the groove.

29. The lifting device for the battery swapping equipment as described in claim 28, characterized in that: The motor is a servo motor.

30. A battery swapping device, characterized in that, The battery swapping equipment includes a lifting device as described in any one of claims 1-29.

31. The battery swapping equipment as described in claim 30, characterized in that, The lifting device is provided in two parts, and the two lifting devices are respectively located on two opposite sides of the lifting platform.

32. The battery swapping equipment as described in claim 31, characterized in that, The battery swapping equipment also includes a traveling frame and a guiding mechanism for moving the battery swapping equipment. The lifting device and the lifting platform are disposed within the traveling frame. The guiding mechanism is used to assist the lifting platform in lifting and guiding it during the lifting process. The guiding mechanism includes a sliding groove disposed on the side of the walking frame in the battery swapping equipment and a slider disposed on the corresponding surface of the lifting platform. Alternatively, the guiding mechanism includes a first rod assembly and a second rod assembly, each having a movable connection end for movably connecting to one of the lifting platform and the traveling frame, and a rotatable connection end for rotatably connecting to the other of the lifting platform and the traveling frame. The first rod assembly and the second rod assembly are hinged to each other so that the guiding mechanism extends and retracts along the lifting direction of the lifting platform as the lifting platform rises and falls.

33. The battery swapping equipment as described in claim 32, characterized in that, The guiding mechanism includes sliding grooves on the two sides of the walking frame in the battery swapping equipment where the lifting device is not located, and a slider on the corresponding surface of the lifting platform.

34. The battery swapping equipment as described in claim 32, characterized in that, The guiding mechanism is disposed at least between two opposite sides of the traveling frame and the corresponding surfaces of the lifting platform.

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