Lifting device of battery replacing equipment and battery replacing equipment

Abstract

The utility model provides a lifting device of battery replacing equipment and the battery replacing equipment, the lifting device is used for being arranged on the battery replacing equipment to drive a lifting platform to lift, the lifting platform is used for placing a battery pack, and the lifting device comprises a hydraulic power source, a transmission unit and an execution unit which are sequentially connected in a transmission mode. The push rod can perform first linear motion in a first direction; the transmission unit is used for converting the first linear motion into first rotary motion and driving the execution unit to rotate synchronously; the execution unit is away from the rotation center to drive the lifting platform to lift. According to the lifting device of the battery replacing equipment and the battery replacing equipment, the lifting device is hydraulically driven, high power and large torque can be provided, and the thrust requirement of a lifting platform can be met. And meanwhile, the hydraulic system is small in size, low in cost and low in failure rate, so that the space utilization rate of the lifting device is higher, the economical efficiency is better, and the durability is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of vehicle battery replacement, especially to a lifting device of battery replacement equipment and battery replacement equipment. BACKGROUND

[0002] The battery installation of the existing electric vehicle is generally divided into fixed type and replaceable type, and the replaceable type battery generally adopts a movable installation mode, the battery can be taken down at any time for replacement or charging, and after replacement or charging is completed, the battery is installed on the vehicle body again. The battery replacement equipment needs to carry and lift the battery pack during work, and the weight of the battery pack is large, so the lifting power requirement is high, therefore, in the current battery replacement equipment, a high-power motor and other power sources and various transmission structures are needed to realize lifting, which leads to complex structure, large span of the lifting mechanism, and the battery replacement equipment using such transmission structure occupies large space and is prone to interference. In addition, the high-power power source and the complex transmission unit also lead to high cost and high failure rate of the entire lifting mechanism, thereby reducing the stability of the battery replacement equipment and increasing the cost. SUMMARY

[0003] The utility model solves the technical problem that the lifting mechanism of the existing battery replacement equipment occupies large space, has high cost and high failure rate, and provides a lifting device of battery replacement equipment and battery replacement equipment.

[0004] The utility model solves the above technical problem through the following technical scheme:

[0005] A lifting device of battery replacement equipment is used for driving the lifting platform to lift, the lifting platform is used for placing the battery pack, the lifting device comprises a hydraulic power source, a transmission unit and an execution unit which are connected in sequence:

[0006] The hydraulic power source comprises a hydraulic cylinder and a push rod, the push rod can move linearly in the first direction;

[0007] The transmission unit is used for converting the first linear motion into first rotary motion and driving the execution unit to rotate synchronously;

[0008] The end of the execution unit away from the rotation center is connected with the lifting platform to drive the lifting platform to lift.

[0009] In the present scheme, the above structure is adopted, the lifting device is driven by hydraulic pressure, the linear motion of the hydraulic power source is converted into rotary motion through the transmission unit, and finally the height of the lifting platform is raised through the rotary motion of the execution unit. The lifting platform is used to carry the battery pack, which is heavy, and requires high lifting power. The hydraulic system can provide high power and large torque, and is particularly suitable for high-power and heavy-load application scenarios, which can meet the thrust requirements of the lifting platform. At the same time, the hydraulic system is small in size and low in cost, so that the space utilization rate of the lifting device is higher and the economy is better. In addition, the hydraulic drive has low failure rate and high durability, which enhances the stability and service life of the battery swap equipment, and further reduces the use and maintenance cost of the battery swap equipment.

[0010] Preferably, the transmission unit comprises a first transmission part and a second transmission part, the first transmission part is capable of moving in the first direction under the drive of the push rod;

[0011] The second transmission part is fixed with the execution unit, and the second transmission part can be driven by the first transmission part and perform first rotary motion to drive the execution unit to rotate synchronously.

[0012] In the present scheme, the above structure is adopted, the transmission unit comprises a first transmission part and a second transmission part, the first transmission part is capable of moving in the first direction under the drive of the push rod;

[0013] Preferably, the first transmission part and the second transmission part are connected through gear transmission, chain transmission or linkage transmission.

[0014] In the present scheme, the above structure is adopted, and several common transmission forms for realizing the conversion of linear motion and rotary motion are provided.

[0015] Preferably, the first transmission part comprises a gear, a fixed rack and a sliding rack;

[0016] The gear is rotatably connected with the push rod and can move in the first direction under the drive of the push rod;

[0017] The fixed rack and the sliding rack extend in the first direction and are respectively arranged on the two sides of the gear and are engaged, wherein the fixed rack is fixed, and the sliding rack can slide in the first direction;

[0018] When the gear moves in the first direction, the sliding rack is driven and moves in the first direction, and can drive the second transmission part to rotate.

[0019] In the present scheme, the above structure is adopted, and a transmission structure similar to the principle of a movable pulley is formed through the cooperation of two racks and a gear, wherein the gear is the movable pulley, the stroke of which is the same as that of the push rod of the hydraulic power source, and the gear performs a first linear motion. The gear is engaged with the fixed rack and the sliding rack, respectively. When the gear moves with the push rod, the sliding rack also performs a second linear motion in the first direction under the interaction of the gear rack, and the stroke thereof is twice that of the push rod of the hydraulic power source, thereby amplifying the motion stroke of the hydraulic power source. This structure can make the hydraulic power source only need half of the original stroke under the condition that the lifting height is unchanged, thereby further reducing the volume of the hydraulic power source, and making the entire lifting device more compact and having a lower space utilization rate.

[0020] Preferably, the second transmission part comprises a chain wheel and a chain.

[0021] The chain wheel is fixedly connected with the execution unit, and the chain is fixedly connected with the sliding rack. When the sliding rack performs a second linear motion, the chain wheel is driven by the chain to perform a first rotary motion.

[0022] In the present scheme, the above structure is adopted. The use of chain transmission can make the rack not need to be directly extended to the position of the execution unit and directly contact the execution unit, so that the length of the rack can be set to be shorter to meet the stroke requirement of the second linear motion, the space occupation is smaller, and the structure is more compact.

[0023] Preferably, the lifting device is arranged on the frame wall surface of the battery replacement equipment, and the hydraulic power source, the first transmission part, the second transmission part, and the execution unit are arranged on the inward first side surface and the outward second side surface of the frame wall surface, respectively.

[0024] In the present scheme, the above structure is adopted, and is arranged on both sides of the frame at the same time, so that the space layout is more reasonable, and the space utilization rate is higher.

[0025] Preferably, the hydraulic power source and the first transmission part are arranged on the first side surface, and the second transmission part is arranged on the second side surface.

[0026] The transmission unit further comprises a connecting part, the sliding rack is fixedly connected with the chain through the connecting part, the connecting part penetrates through the frame wall surface, and the connecting part extends to the first side surface and the second side surface, respectively.

[0027] In the present scheme, the above structure is adopted. The chain and the rack coincide in the moving direction, and arranging them on two side surfaces can avoid space conflict and mutual interference when they are arranged on one side, and the arrangement is easier. The connecting part directly penetrates through the frame wall surface to directly connect the first side surface and the second side surface, and no additional structure is needed to bypass the frame wall surface, so that the structure is simple.

[0028] Preferably, the connecting part comprises a connecting body and a chain connecting end, the connecting body is fixed with the sliding rack, and the chain connecting end is arranged on the connecting body.

[0029] The chain has a gap, and the chain connecting end is arranged in the gap and fixed with both ends of the gap of the chain.

[0030] In this scheme, the connecting part is connected to the chain through the chain connecting end, and the gap of the chain is filled to close the chain and the chain connecting end. This structure has greater connection strength and better effect.

[0031] Preferably, the lifting device further comprises a linear guide rail arranged in the first direction, and the sliding rack is embedded in the linear guide rail and can slide on the linear guide rail.

[0032] In this scheme, the sliding rack is guided to slide by arranging the linear guide rail, so that the movement of the sliding rack is more controllable.

[0033] Preferably, the first transmission part comprises a first connecting rod, and the second transmission part comprises a second connecting rod, one end of the first connecting rod is rotationally connected with the push rod, the other end of the first connecting rod is rotationally connected with the tail end of the second connecting rod, and the second connecting rod can make a first rotational movement around the first end as the center and drive the execution unit to rotate synchronously.

[0034] Or,

[0035] The first transmission part comprises a rack, and the second transmission part comprises a gear meshing with the rack. The rack is fixed to the push rod, and the gear is fixedly connected with the execution unit and can drive the execution unit to rotate synchronously under the action of the rack.

[0036] In this scheme, the connecting rod assembly and the gear and rack are basic components for converting linear motion into rotational motion, and the transmission unit can simply and effectively realize the conversion of motion through this structure.

[0037] Preferably, the execution unit is a cam, the cam comprises a rotating body connected with the transmission unit and a protruding end formed on the outer edge of the rotating body away from the rotation center, and the protruding end is connected with the lifting platform.

[0038] In this scheme, the cam can convert rotational motion into vertical height motion, and the transmission unit can convert the linear motion output by the hydraulic power source into height direction motion to drive the lifting platform to rise and fall.

[0039] Preferably, the lifting device further comprises a sliding groove arranged in a horizontal direction and a sliding block, the sliding groove is connected to the lifting platform, the sliding block is arranged in the sliding groove and can slide in the sliding groove in the horizontal direction, and the protruding end is connected to the sliding block.

[0040] In this scheme, by using the above structure, the sliding structure arranged on the execution unit can convert the horizontal movement of the cam during rotation into the sliding of the sliding block, thereby eliminating the movement in the horizontal direction, so that the lifting platform only rises and falls in the vertical direction during lifting.

[0041] A battery replacement device comprising a lifting platform for placing a battery pack, which comprises a lifting device of the battery replacement device as described above.

[0042] In this scheme, by using the above structure, the lifting device is driven by hydraulic pressure, the linear motion of the hydraulic power source is converted into rotary motion through the transmission unit, and finally the height of the lifting platform is raised through the rotary motion of the execution unit. The lifting platform is used to carry the battery pack, which is heavy, and requires high lifting power. The hydraulic system can provide high power and large torque, and is particularly suitable for high-power and heavy-load application scenarios, which can meet the thrust requirements of the lifting platform. At the same time, the hydraulic system has small volume and low cost, so that the space utilization rate of the lifting device is higher and the economy is better. In addition, the hydraulic drive has low failure rate and high durability, which enhances the stability and service life of the battery replacement device, and further reduces the use and maintenance cost of the battery replacement device.

[0043] Preferably, the battery replacement device comprises a frame, the frame comprises a frame wall surface, and the frame wall surface has a through groove.

[0044] The transmission unit comprises a first connecting portion and a second connecting portion arranged on a first side surface and a second side surface of the frame wall surface respectively, and the first connecting portion and the second connecting portion are connected in the through groove.

[0045] In this scheme, by using the above structure, the chain and the rack coincide in the moving direction, and arranging them on two side surfaces can avoid space conflict and mutual interference when they are arranged on one side, and the arrangement is easier. The connecting portion directly penetrates the frame wall surface to directly connect the first side surface and the second side surface, without additional structure bypassing the frame wall surface, and the structure is simple.

[0046] The utility model discloses a positive progress effect lies in: the utility model provides a kind of lifting device and battery replacement equipment of battery replacement equipment, lifting device adopts hydraulic drive, the linear motion of hydraulic power source is converted into rotary motion by transmission unit, and finally the height of lifting platform is realized by the rotary motion of execution unit to rise.Lifting platform is used to carry battery pack, and weight is larger, and the lifting power requirement is higher.Hydraulic system can provide high power and large torque, especially suitable for high-power and heavy load application scene, can satisfy the thrust requirement of lifting platform.At the same time, hydraulic system is small in size, low in cost, so that the space utilization of lifting device is higher while economy is better.In addition, hydraulic drive failure rate is low, and durability is stronger, enhances the stability and life of battery replacement equipment, also further reduces the use and maintenance cost of battery replacement equipment. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 It is the structural diagram of battery replacement equipment of the utility model embodiment one.

[0048] Figure 2 It is the structural diagram of transmission unit of the utility model embodiment one.

[0049] Figure 3 It is the structural diagram of first transmission part of the utility model embodiment one.

[0050] Figure 4 It is the structural diagram of transmission unit of the utility model embodiment one.

[0051] Figure 5 It is the structural diagram of second transmission part of the utility model embodiment one.

[0052] Figure 6 It is the structural diagram of execution unit of the utility model embodiment one.

[0053] Figure 7 It is the structural diagram of transmission unit of the utility model embodiment two.

[0054] Figure 8 It is the structural diagram of transmission unit of the utility model embodiment three.

[0055] BRIEF DESCRIPTION OF DRAWINGS

[0056] Battery replacement equipment 100

[0057] Lifting platform 101

[0058] Frame wall 110

[0059] First side 111

[0060] Second side 112

[0061] Through groove 113

[0062] Hydraulic power source 1

[0063] Hydraulic cylinder 11

[0064] Push rod 12

[0065] Transmission unit 2

[0066] First transmission part 21

[0067] Fixed rack 212

[0068] Sliding rack 213

[0069] Linear guide rail 2131

[0070] Second transmission part 22

[0071] Sprocket 221

[0072] Chain 222

[0073] Connecting part 23

[0074] Connecting body 231

[0075] Chain connecting end 232

[0076] Execution unit 3

[0077] Cam 31

[0078] Slide groove 32

[0079] Slide block 33

[0080] First direction A DETAILED DESCRIPTION

[0081] The utility model is described in detail below with reference to the preferred embodiments and drawings.

[0082] Embodiment 1

[0083] As Figure 1 shown, the embodiment provides a battery replacement device 100 for transporting and replacing battery packs of electric vehicles in a battery replacement station. The battery replacement device 100 includes a lifting platform 101 for placing the battery packs, the lifting platform 101 having a battery tray for placing the battery packs and a battery replacement mechanism for replacing the batteries, when replacing the batteries, the lifting platform 101 is raised to the position of the bottom of the electric vehicle and the battery packs are disassembled and installed.

[0084] As Figures 1 to 6As shown, the lifting platform 101 is lifted by the lifting device arranged on the battery swap device 100, which includes a hydraulic power source 1, a transmission unit 2 and an execution unit 3 connected in sequence. The hydraulic power source 1 includes a hydraulic cylinder 11 and a push rod 12, which can be driven by the hydraulic cylinder 11 to move linearly in the first direction A. The push rod 12 is connected to the transmission unit 2, which is used to convert the first linear motion into the first rotary motion and drive the execution unit 3 to rotate synchronously. The execution unit 3 is connected to the lifting platform 101 at the end away from its rotation center to drive the lifting platform 101 to lift. The first direction A is the horizontal direction, and the first linear motion is the reciprocating motion in the horizontal direction of the battery swap device 100.

[0085] The lifting device is driven by hydraulic pressure, which converts the linear motion of the hydraulic power source 1 into rotary motion through the transmission unit 2, and finally realizes the height rise of the lifting platform 101 through the rotary motion of the execution unit 3. The lifting platform 101 is used to carry the battery pack, which is heavy and requires high lifting power. The hydraulic system can provide high power and large torque, which is particularly suitable for high-power and heavy-load application scenarios, and can meet the thrust requirements of the lifting platform 101. At the same time, the hydraulic system has small volume and low cost, which makes the space utilization of the lifting device higher and the economy better. In addition, the hydraulic drive has low failure rate and high durability, which enhances the stability and service life of the battery swap device 100, and further reduces the use and maintenance cost of the battery swap device 100.

[0086] As shown, Figures 2 to 5 The transmission unit 2 includes a first transmission part 21 and a second transmission part 22, and the first transmission part 21 can move in the first direction A under the drive of the push rod 12. The second transmission part 22 is fixed with the execution unit 3, and the second transmission part 22 can be driven by the first transmission part 21 and move in the first rotary motion to drive the execution unit 3 to rotate synchronously.

[0087] The transmission unit 2 includes the first transmission part 21 moving linearly and the second transmission part 22 moving in rotation, wherein the movement direction of the first transmission part 21 is the same as that of the push rod 12 of the hydraulic power source 1, which is used to be directly connected with the hydraulic power source 1, and the second transmission part 22 is used to realize the rotary motion, which cooperates with the first transmission part 21 to convert the linear motion into the rotary motion and transmit to the execution unit 3.

[0088] The first transmission part 21 and the second transmission part 22 are connected by gear transmission, chain transmission or connecting rod transmission. The above three transmission forms are common transmission forms for converting linear motion and rotary motion. In this embodiment, gear transmission and chain transmission are combined. In other embodiments, the other two forms or other common transmission forms in the prior art can also be used.

[0089] AsFigure 3 As shown, the first transmission unit 21 includes a gear, a fixed rack 212, and a sliding rack 213. The gear is rotatably connected to the push rod 12 and can perform a first linear motion along a first direction A under the drive of the push rod 12. The fixed rack 212 and the sliding rack 213 extend along the first direction A and are respectively disposed on both sides of the gear and mesh with each other, wherein the fixed rack 212 is fixed, and the sliding rack 213 can slide along the first direction A. When the gear performs the first linear motion, the sliding rack 213 is driven to perform a second linear motion along the first direction A and can drive the second transmission unit 22 to perform a first rotational motion.

[0090] When the lifting device is running, the push rod 12 first moves horizontally, which pushes the gear at the end of the push rod 12 to move linearly in sync. The gear meshes with the fixed rack 212 and the sliding rack 213 located on its upper and lower sides, respectively. When the gear makes the first linear motion, because its upper part meshes with the fixed rack 212, it rotates synchronously while moving, driving the sliding rack 213 meshing with it to make a second linear motion. At this time, in addition to the travel distance driven by the first linear motion of the gear, the sliding rack 213 also travels due to the rotation of the gear. Therefore, the travel distance of the second linear motion is twice the travel distance of the first linear motion of the push rod 12.

[0091] In this embodiment, a transmission structure similar to a movable pulley is formed by the cooperation of two racks and gears. The gears are the movable pulleys, and their stroke is the same as that of the push rod 12 of the hydraulic power source 1, making a first linear motion. The gears mesh with the fixed rack 212 and the sliding rack 213 respectively. While the gears move with the push rod 12, the sliding rack 213 also makes a second linear motion along the first direction A under the interaction of the gears and racks, and its stroke is twice that of the push rod 12 of the hydraulic power source 1, thus amplifying the motion stroke of the hydraulic power source 1. This structure allows the hydraulic power source 1 to only require half the original stroke while keeping the lifting height unchanged, further reducing its size and making the entire lifting device more compact and with lower space utilization.

[0092] like Figure 5 As shown, the second transmission unit 22 includes a sprocket 221 and a chain 222. The sprocket 221 is fixedly connected to the execution unit 3, and the chain 222 is fixedly connected to the sliding rack 213. When the sliding rack 213 performs the second linear motion, it drives the sprocket 221 to perform the first rotational motion through the chain 222.

[0093] The use of chain transmission can make the rack not need to directly extend to the position of the execution unit 3 and directly contact it, so that its length can be set shorter to meet the stroke requirement of the second linear motion, the space occupation is smaller, and the structure is more compact. In addition, the chain 222 can drive multiple sprockets 221 to rotate, so that multiple execution units 3 can be driven to lift on the basis of sharing one hydraulic power source 1. In this embodiment, the lifting device includes two execution units 3, and the two execution units 3 are driven by one hydraulic driving member and one transmission unit 2. The second transmission part 22 includes two sprockets 221 driven by the same chain 222.

[0094] In other embodiments, other transmission forms can also be used, such as not setting the chain 222, directly meshing the sliding rack 213 with the execution unit 3 through a gear, and the like.

[0095] As shown in FIG. 1, Figures 2 to 4 The battery replacement device 100 includes a frame, and the frame includes a frame wall surface 110. The lifting device is arranged on the frame wall surface 110 of the battery replacement device 100, and the hydraulic power source 1, the first transmission part 21, the second transmission part 22, and the execution unit 3 are arranged on the inward first side surface 111 and the outward second side surface 112 of the frame wall surface 110, respectively. At the same time, they are arranged on both sides of the frame, the space layout is more reasonable, and the space utilization rate is higher. In other embodiments, they can also be arranged on one side, as long as the components do not interfere with each other.

[0096] As shown in FIG. 1, Figures 2 to 4 In this embodiment, the hydraulic power source 1 and the first transmission part 21 are arranged on the first side surface 111, and the second transmission part 22 is arranged on the second side surface 112. That is, the hydraulic rod, the push rod 12, the sliding rack 213, the fixed rack 212, and the gear are located on one side, and the execution unit 3, the chain 222, and the sprocket 221 are located on the other side. The transmission unit 2 further includes a connecting part 23, the sliding rack 213 is fixedly connected with the chain 222 through the connecting part 23, a through groove 113 is formed in the frame wall surface 110, the connecting part 23 penetrates through the frame wall surface 110 through the through groove 113, and the connecting part 23 extends to the first side surface 111 and the second side surface 112, respectively. The chain 222 and the rack coincide in the moving direction, and arranging them on the two side surfaces can avoid the space conflict and mutual interference when they are arranged on one side, and the arrangement is easier. The connecting part 23 directly penetrates through the frame wall surface 110 to directly connect the first side surface 111 and the second side surface 112, and does not need to bypass the frame wall surface 110 through an additional structure, so the structure is simple.

[0097] As shown in FIG. 1, Figure 4 , Figure 5As shown, the connecting part 23 includes a connecting body 231 and a chain connecting end 232, the connecting body 231 is fixed with the sliding rack 213, and the chain connecting end 232 is arranged on the connecting body 231. The chain 222 has a gap, and the chain connecting end 232 is arranged in the gap and fixedly connected with both ends of the gap of the chain 222. The connecting part 23 is connected into the chain 222 through the chain connecting end 232, and fills the gap of the chain 222 to make the chain 222 and the chain connecting end 232 closed, which has greater connection strength and better effect.

[0098] In other embodiments, the frame wall 110 can also not adopt the through scheme, at which time the connecting part 23 can bypass the top of the frame wall 110 and connect the two sides of the frame wall 110.

[0099] As shown in the figure, Figure 3 As shown, the lifting device further includes a linear guide rail 2131 arranged in the first direction A, and the sliding rack 213 is embedded on the linear guide rail 2131 and can slide on the linear guide rail 2131. By arranging the linear guide rail 2131 to guide the sliding of the sliding rack 213, the movement of the sliding rack 213 is more controllable.

[0100] As shown in the figure, Figure 6 As shown, the execution unit 3 is a cam 31, which includes a rotating body connected with the transmission unit 2 and a protruding end formed on the outer edge of the rotating body away from the rotation center, and the protruding end is connected with the lifting platform 101. The cam 31 can convert the rotary motion into the vertical height motion, and in cooperation with the transmission unit 2, it can convert the linear motion output by the hydraulic power source 1 into the height direction motion to drive the lifting platform 101 to rise and fall.

[0101] As shown in the figure, Figure 6 As shown, it further includes a sliding groove 32 arranged in the horizontal direction and a sliding block 33, the sliding groove 32 is connected with the lifting platform 101, the sliding block 33 is arranged in the sliding groove 32 and can slide in the sliding groove 32 in the horizontal direction, and the protruding end is connected with the sliding block 33. The sliding structure can convert the horizontal motion of the cam 31 into the sliding of the sliding block 33 when the cam 31 rotates, and then eliminate it, so that the lifting platform 101 only rises and falls in the vertical direction when lifting.

[0102] Embodiment 2

[0103] As shown in the figure, Figure 7 As shown in the figure, the lifting device of the embodiment is basically the same as that of embodiment 1, and the difference is that the first transmission part 21 of the embodiment includes a rack, and the second transmission part 22 includes a gear meshing with the rack. The rack is fixed to the push rod 12, and the gear is fixedly connected with the execution unit 3 and can drive the execution unit 3 to rotate synchronously under the action of the rack. The rack and the gear are basic components for converting linear motion into rotary motion, and the transmission unit 2 can effectively realize the conversion of motion through such a simple structure.

[0104] Embodiment 3

[0105] As Figure 8 shown, the lifting device of the embodiment is basically the same as that of Embodiment 1, except that the first transmission part 21 comprises a first connecting rod, the second transmission part 22 comprises a second connecting rod, one end of the first connecting rod is rotatably connected with the push rod 12, the other end of the first connecting rod is rotatably connected with the tail end of the second connecting rod, and the second connecting rod can make a first rotary motion around its head end as the center and drive the execution unit 3 to rotate synchronously. The connecting rod assembly is also a basic assembly for converting linear motion into rotary motion, and the transmission unit 2 can effectively realize the conversion of motion through this simple structure.

[0106] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, the protection scope of the present application 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 application, but these changes and modifications all fall within the protection scope of the present application.

Claims

1. A lifting device of a battery swap device, configured to be arranged on the battery swap device to drive a lifting platform to lift and lower, the lifting platform being configured to place a battery pack, characterized in that, The lifting device comprises a hydraulic power source, a transmission unit and an execution unit connected in sequence; The hydraulic power source comprises a hydraulic cylinder and a push rod, the push rod being capable of first linear motion in a first direction; The transmission unit is used for converting the first linear motion into first rotary motion and driving the execution unit to rotate synchronously; The execution unit is connected to the lifting platform at an end away from its rotation center to drive the lifting platform to lift.

2. The lifting device of the battery replacing apparatus according to claim 1, wherein The transmission unit comprises a first transmission part and a second transmission part, the first transmission part being capable of motion in the first direction under the drive of the push rod; The second transmission part is fixed with the execution unit, and the second transmission part can be driven by the first transmission part to perform first rotary motion to drive the execution unit to rotate synchronously. 3.The lifting device of the battery replacing apparatus according to claim 2, wherein The first transmission part and the second transmission part are connected through gear transmission, chain transmission or linkage transmission.

4. The lifting device of the battery replacing apparatus according to claim 3, wherein The first transmission part comprises a gear, a fixed rack and a sliding rack; The gear is rotatably connected with the push rod and is capable of first linear motion in the first direction under the drive of the push rod; The fixed rack and the sliding rack extend in the first direction and are arranged on the two sides of the gear respectively and are in meshing, wherein the fixed rack is fixed, and the sliding rack can slide in the first direction; When the gear performs the first linear motion, the sliding rack is driven to perform second linear motion in the first direction and can drive the second transmission part to perform first rotary motion. 5.The lifting device of the battery replacing apparatus according to claim 4, wherein The second transmission part comprises a sprocket and a chain; The sprocket is fixedly connected with the execution unit, and the chain is fixedly connected with the sliding rack, and the sliding rack performs second linear motion to drive the sprocket to perform first rotary motion through the chain. 6.The lifting device of the battery replacing apparatus according to claim 5, wherein The lifting device is arranged on the frame wall surface of the battery replacing device, and the hydraulic power source, the first transmission part, the second transmission part and the execution unit are arranged on the inward first side surface and the outward second side surface of the frame wall surface respectively. 7.The lifting device of the battery replacing apparatus according to claim 6, wherein The hydraulic power source and the first transmission part are arranged on the first side surface, and the second transmission part is arranged on the second side surface; The transmission unit further comprises a connecting part, the sliding rack is fixedly connected with the chain through the connecting part, the connecting part penetrates through the frame wall surface, and the connecting part extends to the first side surface and the second side surface respectively. 8.The lifting device of the battery replacing apparatus according to claim 7, wherein The connecting part comprises a connecting main body and a chain connecting end, the connecting main body is fixed with the sliding rack, and the chain connecting end is arranged on the connecting main body; The chain has a notch, and the chain connecting end is arranged in the notch and fixedly connected with both ends of the notch of the chain. 9.The lifting device of the battery replacing apparatus according to claim 4, wherein The lifting device further comprises a linear guide rail arranged in the first direction, and the sliding rack is embedded in the linear guide rail and can slide on the linear guide rail. 10.The lifting device of the battery replacing apparatus according to claim 3, wherein The first transmission part comprises a first linkage, and the second transmission part comprises a second linkage, one end of the first linkage is rotatably connected with the push rod, the other end of the first linkage is rotatably connected with the tail end of the second linkage, and the second linkage can perform first rotary motion around its head end as the center and drive the execution unit to rotate synchronously; Or, The first transmission part comprises a rack, the second transmission part comprises a gear engaged with the rack, the rack is fixed to the push rod, and the gear is fixedly connected with the execution unit and can drive the execution unit to rotate synchronously under the action of the rack. 11.The lifting device of the battery replacing apparatus according to claim 1, wherein The execution unit is a cam, the cam comprises a rotating body connected with the transmission unit and a convex end formed on the outer edge of the rotating body away from the rotation center, and the convex end is connected with the lifting platform. 12.The lifting device of the battery replacing apparatus according to claim 11, wherein The lifting device further comprises a sliding groove and a sliding block arranged in the horizontal direction, the sliding groove is connected to the lifting platform, the sliding block is arranged in the sliding groove and can slide in the horizontal direction in the sliding groove, and the convex end is connected with the sliding block.

13. A battery swapping apparatus comprising a lifting platform for placing a battery pack, characterized in that, The battery replacement device comprises the lifting device according to any one of claims 1 to 11.

14. The battery replacement device according to claim 13, wherein The battery replacement device comprises a frame, the frame comprises a frame wall surface, and the frame wall surface is provided with a through groove; The transmission unit comprises a first connecting part and a second connecting part arranged on the first side surface and the second side surface of the frame wall surface respectively, and the first connecting part and the second connecting part are connected in the through groove.

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