Accessory for battery replacement and power battery

Abstract

The utility model relates to an accessory for battery replacement, aims to solve the problem of low battery replacement efficiency of electric engineering machinery during field operation battery replacement, and provides an accessory for battery replacement and a power battery, and the accessory for battery replacement comprises an accessory main body and a quick replacement device arranged on the accessory, the quick-change device comprises an upper bolt block and a lower bolt block which are arranged in the same vertical plane, and a bolting oil cylinder; the upper bolt block is fixedly installed on the front side face of the accessory body, and the lower bolt block is slidably arranged on the front side face of the accessory body through a guide device and located below the upper bolt block. The two ends of the bolting oil cylinder are connected with the upper bolt block and the lower bolt block respectively and used for pushing the lower bolt block to slide up and down, an upward upper inserting bolt is arranged on the upper bolt block, and a downward lower inserting bolt is arranged on the lower bolt block. The accessory for battery replacement is connected to the side face of the power battery when connected with the power battery, the influence of the arrangement structure of the power battery is small during battery replacement, and the power battery can be conveniently moved for battery replacement.

Description

Technical Field

[0001] The utility model relates to an accessory, and more specifically, to an accessory for battery replacement and a power battery. Background Art

[0002] With the improvement of electric technology and the reduction of power battery costs, more and more engineering machinery products are driven by power batteries. The use of power batteries has the advantages of lower TCO and more environmental protection. However, the problem of power battery recharge restricts the development of power battery driven equipment, and the recharge method of replaceable power batteries has become one of the effective solutions to solve the problem of recharging electric drive engineering machinery products. Truck battery replacement can be completed in a battery replacement station, but the working scenes of engineering machinery products change quickly, the product driving speed is slow, the appearance varies greatly, and the cost of building a battery replacement station is high; especially when constructing relatively suburban construction sites, power battery replacement has become a difficulty in the industry.

[0003] When engineering machinery changes batteries at the work site, it is usually done by a battery-swapping truck or a forklift. When changing batteries with a battery-swapping truck, a sling is required, which is usually bolted to the top of the power battery. Therefore, this requires that there must be no components above the installation position of the power battery of the electric engineering machinery, otherwise it will interfere with the sling or sling during the battery change. When a forklift is used to change batteries, the power battery is lifted and moved by the forklift's cargo fork. This requires that the power battery of the electric engineering machinery cannot interfere with the cargo fork below the loading direction. For example, the power battery cannot be installed on the electric engineering machinery by sinking. The above-mentioned existing battery-swapping methods are limited by the installation structure of the power battery on the engineering machinery, which makes battery changing inconvenient. Utility Model Content

[0004] The technical problem to be solved by the utility model is the inconvenience of battery replacement in electric engineering machinery, and provides a battery replacement accessory and a power battery.

[0005] The utility model provides a technical solution to achieve its purpose: a battery replacement accessory, comprising an accessory body and a quick-change device installed on the accessory, wherein the quick-change device comprises an upper bolt block and a lower bolt block arranged in the same vertical plane, and a bolted oil cylinder;

[0006] The upper bolt block is fixedly installed on the front side of the attachment body, and the lower bolt block is slidably arranged on the front side of the attachment body through a guide device and is located below the upper bolt block; the two ends of the bolted cylinder are respectively connected to the upper bolt block and the lower bolt block and are used to push the lower bolt block to slide up and down, and the upper bolt block is provided with an upper bolt facing upward, and the lower bolt block is provided with a lower bolt facing downward.

[0007] In the battery replacement accessory of the present invention, the upper plug and the lower plug are respectively arranged symmetrically with respect to the middle surface of the accessory body.

[0008] In the utility model of the battery replacement accessory, the upper bolt block and the lower bolt block are plate-shaped, the upper bolt is composed of a convex strip extending in the left-right direction along the top of the upper bolt block and protruding upward; the lower bolt is composed of a convex strip extending in the left-right direction along the top of the lower bolt block and protruding downward; the upper bolt and the lower bolt are arranged in parallel.

[0009] In the utility model of the battery replacement accessory, a mounting plate for mounting the quick-change device is arranged on the front side of the accessory body, the left and right ends of the lower bolt block extend to the left and right sides of the mounting plate, and guide blocks are installed on the left and right ends of the lower bolt block; vertical slide rails are arranged on the left and right sides of the mounting plate, and the guide block and the end of the lower bolt block form a guide groove matched with the vertical slide rail; the guide device is composed of the vertical slide rail and the guide groove.

[0010] In the battery replacement accessory of the present invention, the cross-section of the upper plug is a trapezoid, and the cross-section of the lower plug is an inverted trapezoid.

[0011] In the battery replacement accessory of the present invention, the cross-sections of the upper plug and the lower plug are both right-angled trapezoids, and the waist edges facing the front are vertical edges.

[0012] In the utility model of the battery replacement accessory, the accessory body comprises:

[0013] A connecting seat, the rear of which is provided with an articulated seat for connecting the attachment to the attachment-carrying equipment;

[0014] A sway frame connected to the front side of the connecting seat via a sway drive mechanism, wherein the sway drive mechanism is configured to drive the sway frame to swing left and right around a vertical axis on the connecting seat;

[0015] A transverse sliding frame is slidably disposed on the front side of the transverse swing frame through a transverse sliding driving mechanism, wherein the transverse sliding driving mechanism is configured to be able to drive the transverse sliding frame to slide left and right on the transverse swing frame;

[0016] A vertical swing frame, connected to the front side of the horizontal sliding frame through a vertical swing drive mechanism, wherein the vertical swing drive mechanism is configured to drive the vertical swing frame to swing left and right around a horizontal axis on the horizontal swing frame;

[0017] The quick-change device is installed on the front side of the vertical swing frame.

[0018] In the utility model of the battery replacement accessory, the sway drive mechanism includes a sway oil cylinder, a sway rear articulated seat and a sway front articulated seat respectively arranged on the front side of the connecting seat and the rear side of the sway frame, and the sway front articulated seat and the sway rear articulated seat are rotatably connected through a sway articulated pin shaft arranged vertically; the sway oil cylinder is used to push the sway frame to rotate around the sway articulated pin shaft, and its two ends are respectively connected to the connecting seat and the sway frame;

[0019] The transverse sliding drive mechanism includes a transverse sliding cylinder and a horizontal slide groove and a horizontal slide rail respectively arranged on the transverse swing frame and the transverse sliding frame and cooperating with each other; the transverse sliding cylinder is used to push the transverse sliding frame to slide left and right, and its two ends are respectively connected to the transverse swing frame and the transverse sliding frame;

[0020] The vertical swing driving mechanism includes a rotating connection mechanism and a rotating driving device, wherein the rotating connection mechanism is used to rotationally connect the vertical swing frame and the transverse sliding frame, and the rotating driving device is used to drive the vertical swing frame to swing left and right around the rotating connection mechanism relative to the transverse sliding frame.

[0021] The utility model provides a technical solution to achieve its purpose: a power battery, a connecting device is arranged on a vertical side surface of a power battery case, the connecting device is connected and used in conjunction with the aforementioned quick-change device for battery replacement accessories, the connecting device comprises an upper hook and a lower hook fixed on the power battery case, the upper hook is provided with an upper bolt groove with a notch facing downward for the upper bolt to be inserted; the lower hook is provided with a lower bolt groove with a notch facing upward for the lower bolt to be inserted.

[0022] In the power battery of the utility model, a lower hook is arranged directly below each upper hook.

[0023] Compared with the prior art, the battery replacement accessory of the utility model is connected to the side of the power battery when connected to the power battery, and is less affected by the arrangement structure of the power battery during battery replacement, making it convenient to move the power battery for battery replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the rear side of the battery replacement accessory of the utility model.

[0025] Figure 2 It is a structural schematic diagram of the front side of the battery replacement accessory of the utility model.

[0026] Figure 3 It is a schematic diagram of the exploded structure of the quick-change device in the battery-changing accessory of the utility model.

[0027] Figure 4 It is a schematic diagram of the connection structure between the battery replacement attachment and the lifting arm of the utility model.

[0028] Figure 5 It is a schematic diagram of the connection structure between the horizontal swing frame and the horizontal sliding frame in the battery replacement accessory of the utility model.

[0029] Figure 6 It is a schematic diagram of the connection structure of the horizontal sliding frame and the vertical swing frame in the battery replacement accessory of the utility model.

[0030] Figure 7It is a structural schematic diagram of the rotating connection mechanism in the battery replacement accessory of the utility model.

[0031] Figure 8 It is a structural schematic diagram of the power battery of the utility model.

[0032] Fig. 9 It is a structural schematic diagram of the battery-swapping vehicle of the utility model.

[0033] Parts names and serial numbers in the figure:

[0034] Accessories 60.

[0035] Connecting seat 61, horizontal connecting pin shaft 611, front swing cylinder support 612, lateral swing cylinder rear support 613, front swing cylinder 614, lateral swing rear articulated seat 615.

[0036] The sway frame 63 , the sway oil cylinder 631 , the sway front articulated seat 632 , the sway articulated pin 633 , the sway oil cylinder front support 634 , the upper slide rail 635 , and the lower slide rail 636 .

[0037] Horizontal slide frame 65, horizontal slide cylinder 651, upper slide groove 652, lower slide groove 653, upper slide groove block 654, lower slide groove block 655, rotation connection mechanism 656, outer ring 6561, inner ring 6562, rotation drive device 657.

[0038] Vertical swing frame 67, vertical slide rail 671.

[0039] Quick-change device 69 , upper bolt block 691 , upper plug 6911 , lower bolt block 692 , lower plug 6921 , bolted cylinder 693 , guide block 694 , guide slide 695 , guide device 696 .

[0040] Lifting arm 722.

[0041] Power battery 100 , power battery box 110 , upper hook 111 , upper bolt slot 112 , lower hook 121 , lower bolt slot 122 .

[0042] Battery bracket 200 , battery replacement working device 300 , articulated frame 400 , front frame 401 , rear frame 402 , and cab 403 . DETAILED DESCRIPTION

[0043] The specific implementation scheme is described below with reference to the accompanying drawings.

[0044] like Figure 1 Figure 2 As shown, the attachment 60 includes a quick-change device 69 and an attachment body. The attachment body includes a connecting seat 61, a horizontal swing frame 63, a horizontal sliding frame 65, and a vertical swing frame 67. The quick-change device 69 is installed on the front side of the attachment body and is used to connect with the power battery.

[0045] like Figure 2 Figure 3 As shown, the quick-change device 69 includes an upper bolt block 691 fixedly mounted on the vertical swing frame 67, a lower bolt block 692 slidably arranged on the vertical swing frame 67 through a guide device 696, and a bolted cylinder 693 for pushing the lower bolt block 692 to slide up and down; the two ends of the bolted cylinder 693 are respectively connected to the upper bolt block 691 and the lower bolt block 692, the lower bolt block 692 is arranged below the upper bolt block 691, the upper bolt block 691 is provided with an upper bolt 6911 facing upward, and the lower bolt block 692 is provided with a lower bolt 6921 facing downward; the upper bolt 6911 and the lower bolt 6921 are respectively arranged symmetrically about the middle surface of the attachment 60.

[0046] Figure 3 As shown, vertical slide rails 671 are provided on the left and right sides of the vertical swing frame 67. The left and right ends of the lower bolt block 692 extend to the positions where the vertical slide rails 671 are provided on the left and right sides of the vertical swing frame 67. Guide blocks 694 are installed on the left and right ends of the lower bolt block 692; the guide blocks 694 and the ends of the lower bolt block 692 form guide grooves 695 for accommodating the vertical slide rails 671; the guide device 696 is composed of the vertical slide rails 671 and the guide grooves 695.

[0047] The upper bolt block 691 is a long plate-like structure, which is arranged in parallel with the lower bolt block 692. The upper plug 6911 is arranged at the top of the upper bolt block 691 in the shape of a strip protrusion along the length direction of the upper bolt block 691 and protrudes upward. The lower plug 6921 is arranged at the bottom of the lower bolt block 692 in the shape of a strip protrusion and protrudes downward.

[0048] The cross-sections of the upper plug 6911 and the lower plug 6921 are both right-angled trapezoids, and the waist edges facing the front are vertical edges. The cross-section of the upper plug 6911 is narrow at the top and wide at the bottom, while the cross-section of the lower plug 6921 is wide at the top and narrow at the bottom, and is an inverted trapezoid.

[0049] like Figure 1 Figure 4 As shown, a horizontal connecting pin 611 is provided at the upper end of the connecting seat 61, and is rotatably connected to the front of the lifting arm 722 through the horizontal connecting pin 611. A front swing oil cylinder 614 is arranged behind the connecting seat 61, and the lower end of the front swing oil cylinder 614 is connected to the front swing oil cylinder support 612 at the rear of the connecting seat 61, and the upper end of the front swing oil cylinder 614 is connected to the front end of the lifting arm 722. The front swing oil cylinder 614 can be extended and retracted to push the connecting seat 61 to swing forward and backward around the horizontal connecting pin 611.

[0050] like Figure 1 As shown, the lateral swing frame 63 is connected to the front side of the connecting seat 61 through a lateral swing driving mechanism, and the lateral swing driving mechanism is configured to be able to drive the lateral swing frame 63 to swing left and right around the vertical axis on the connecting seat 61.

[0051] like Figure 4 Figure 5 As shown, the sway drive mechanism includes a sway cylinder 631, a sway rear hinge seat 615 arranged on the connecting seat 61, and a sway front hinge seat 632 arranged on the sway frame 63. There are two pairs of the sway front hinge seat 632 and the sway rear hinge seat 615, which are arranged at intervals up and down, and are rotatably connected one-to-one through a sway hinge pin 633 arranged vertically, and the axis of the sway hinge pin 633 is a vertical axis. A sway cylinder front support 634 is arranged on the sway frame 63, and a sway cylinder rear support 613 is arranged on the connecting seat 61. The two ends of the sway cylinder 631 are respectively connected to the sway cylinder front support 634 and the sway cylinder rear support 613. The sway cylinder 631 is used to push the sway frame 63 to rotate around the sway hinge pin 633 to achieve left and right swing of the sway frame 63.

[0052] like Figure 1 As shown, the transverse sliding frame 65 is slidably disposed on the front side of the lateral swing frame 63 through a transverse sliding driving mechanism, and the transverse sliding driving mechanism is configured to be able to drive the transverse sliding frame 65 to slide left and right on the lateral swing frame 63 .

[0053] like Figure 5 As shown, the transverse sliding drive mechanism includes a transverse sliding cylinder 651, a horizontal slide rail and a horizontal slide groove which are arranged on the transverse swing frame 63 and the transverse slide frame 65 and cooperate with each other.

[0054] The horizontal slide includes an upper slide 652 and a lower slide 653, and the horizontal slide includes an upper slide 635 and a lower slide 636. An upper slide block 654 for forming the upper slide 652 is provided at the top of the horizontal slide frame 65, and the notch of the upper slide 652 faces downward. An upper slide 635 is provided at the top of the horizontal swing frame 63, and the upper slide 652 cooperates with the upper slide 635. The upper slide 652 plays the role of a hook, so that the horizontal slide frame 65 is suspended on the horizontal swing frame 63 and can slide left and right along the upper slide 635.

[0055] The bottom of the horizontal slide frame 65 is provided with two lower slide groove blocks 655 spaced apart from each other, and the lower slide groove blocks 655 are used to form a lower slide groove 653. The notch of the lower slide groove 653 faces upwards, and cooperates with the lower lower rail 636 at the bottom of the lateral swing frame 63. The lower slide groove 653 plays a role of limiting, preventing the lower part of the horizontal slide frame 65 from moving forward relative to the lateral swing frame 63 and separating from the lateral swing frame 63.

[0056] like Figure 5 As shown, the transverse sliding cylinder 651 is used to push the transverse sliding frame 65 to slide left and right on the transverse swing frame 63, and its two ends are respectively connected to the transverse swing frame 63 and the transverse sliding frame 65.

[0057] like Figure 1 Figure 6 As shown, the vertical swing frame 67 is connected to the front side of the transverse sliding frame 65 through a vertical swing driving mechanism, and the vertical swing driving mechanism is configured to drive the vertical swing frame 67 to swing left and right around a horizontal axis on the transverse swing frame 65.

[0058] like Figure 7 As shown, the vertical swing drive mechanism includes a rotating connection mechanism 656 and a rotating drive device 657. The rotating connection mechanism 656 is used for relative rotational connection between the vertical swing frame 65 and the horizontal sliding frame 63. The rotating drive device 657 is used to drive the vertical swing frame 65 to swing left and right relative to the horizontal sliding frame 63 around the rotating connection mechanism 656.

[0059] Figure 7 The structure of a rotation connection mechanism 656 and a rotation drive device 657 is shown. The rotation connection mechanism 656 is a slewing bearing structure arranged in a vertical plane, which includes an inner ring 6562 and an outer ring 6561. The outer ring 6561 is fixedly connected to the horizontal sliding frame 65, and the inner ring 6562 is fixedly connected to the vertical swing frame 67. The inner ring 6562 can rotate relative to the outer ring 6561.

[0060] The rotation drive device 657 is a hydraulic motor and a reducer assembly, which includes a hydraulic motor and a reducer, and the gear on the output shaft thereof meshes with the gear on the inner ring 6562. The hydraulic motor and the reducer assembly can drive the inner ring 6562 to rotate forward or reverse, thereby driving the vertical swing frame 65 to rotate around the rotation connection mechanism 656, that is, the vertical swing frame 65 swings left or right on the horizontal slide frame 63. In application, the swing angle of the vertical swing frame 67 is small, so the rotation drive device 657 can also use a worm gear device instead of the hydraulic motor and the reducer assembly.

[0061] Since the vertical swing frame 65 rotates at a relatively small angle when the attachment 60 is working, the structures of the rotation connection mechanism 656 and the rotation drive device 657 can also adopt other forms. For example, the rotation connection mechanism 656 is composed of a vertical swing pin shaft, and the vertical swing frame 67 is rotationally mounted to the front side of the horizontal slide frame 65 through the vertical swing pin shaft. Correspondingly, the rotation drive device 657 can be composed of a vertical swing oil cylinder, and the two ends of the vertical swing oil cylinder are respectively connected to the vertical swing frame and the horizontal slide frame. The vertical swing oil cylinder is extended and retracted to push the vertical swing frame to rotate (swing) slightly in the left and right directions around the vertical swing pin shaft.

[0062] exist Figure 1 The attachment body shown includes a connection seat 61, a horizontal swing frame 63, a horizontal sliding frame 65, and a vertical swing frame 67, so that the power battery 100 connected thereto can adjust its posture in multiple dimensions in space. In some other embodiments, the attachment body can be simplified according to the needs of the operation, for example, it only includes the connection seat 61, and the quick-change device 69 is directly installed on the connection seat 61. The connection seat 61 is used to connect with the lifting arm 722 and realize the upside-down flipping of the attachment.

[0063] This embodiment also provides a power battery 100, a connection device is provided on a vertical side surface of the power battery case 110, the connection device is connected and used in conjunction with the quick-change device of the aforementioned battery replacement accessory 60, the connection device includes an upper hook 111 and a lower hook 121 fixed on the power battery case 110, the upper hook 111 is provided with an upper bolt groove 112 with a notch facing downward for the upper bolt 6911 to be inserted; the lower hook 121 is provided with a lower bolt groove 122 with a notch facing upward for the lower bolt 6921 to be inserted. A lower hook 121 is arranged directly below each upper hook 111.

[0064] like Figure 8 As shown, the connecting device includes an upper hook 111 and a lower hook 121 fixed on the power battery box 110. The upper hook 111 is provided with an upper bolt groove 112 with a notch facing downward for the upper bolt 6911 to be inserted into; the lower hook 122 is provided with a lower bolt groove 122 with a notch facing upward for the lower bolt 6921 to be inserted into.

[0065] The notch of the upper bolt groove 101 faces downward. The notch of the lower bolt groove 102 faces upward, opposite to the notch of the upper bolt groove 101. When the quick-change device 69 is connected to the power battery 100, the position of the attachment 60 is adjusted so that the upper bolt block 691 and the lower bolt block 692 are located between the upper bolt groove 112 and the lower bolt groove 122 on the power battery 100, and then the attachment 60 is moved upward so that the upper bolt 6911 is embedded in the upper bolt groove 112, and the bolting cylinder 693 is extended to move the lower bolt block 692 downward until the lower bolt 6921 is embedded in the lower bolt groove 122, thereby completing the connection between the attachment 60 and the power battery box 110.

[0066] The upper hook 111 and the lower hook 121 on the power battery box 110 are arranged mirror-symmetrically with respect to the middle surface of the power battery 100. Figure 8 In the power battery 100 shown, two upper hooks 111 and two lower hooks 121 are provided, and a lower hook 121 is arranged directly below each upper hook 111 .

[0067] Battery replacement accessories can be used in the working device of battery replacement vehicles. Fig. 9 As shown, the battery-swapping vehicle includes an articulated frame 400 and a working device 300, a cab 403 is mounted on the front of a rear frame 402, a base of the working device 300 is fixedly mounted on the rear of a front frame 401, and a battery bracket 200 is mounted on the front end of the front frame 401 for placing power batteries to be replaced and power batteries 100 replaced from electric machinery. The battery-swapping vehicle adopts an articulated frame 400, which is similar to the frame structure of a loader, so that it has strong off-road capabilities and is suitable for battery-swapping operations on electric engineering machinery in work sites with uneven ground.

[0068] The front end of the lifting arm 722 of the working device 300 is equipped with an attachment 60, which can be connected to the side of the power battery box 110 through the quick-change device 69 to realize the transportation and movement of the power battery 100. The attachment 60 is connected to the side of the power battery 100 and only occupies the rear space of the power battery in six directions: front, back, left, right, up and down, which facilitates the movement of the power battery during the battery replacement process and improves the site adaptability and battery replacement efficiency.

Claims

1. A battery replacement accessory, comprising an accessory body and a quick-change device installed on the accessory, characterized in that: The quick-change device comprises an upper bolt block and a lower bolt block, and a bolt-connected oil cylinder, which are arranged in the same vertical plane; The upper bolt block is fixedly installed on the front side of the attachment body, and the lower bolt block is slidably arranged on the front side of the attachment body through a guide device and is located below the upper bolt block; the two ends of the bolted cylinder are respectively connected to the upper bolt block and the lower bolt block and are used to push the lower bolt block to slide up and down, and the upper bolt block is provided with an upper bolt facing upward, and the lower bolt block is provided with a lower bolt facing downward.

2. The battery replacement accessory according to claim 1, characterized in that: The upper plug and the lower plug are respectively arranged symmetrically with respect to the middle plane of the attachment body.

3. The battery replacement accessory according to claim 1 or 2, characterized in that: The upper bolt block and the lower bolt block are plate-shaped, the upper bolt is composed of a convex strip extending in the left-right direction along the top of the upper bolt block and protruding upward; the lower bolt is composed of a convex strip extending in the left-right direction along the top of the lower bolt block and protruding downward; the upper bolt and the lower bolt are arranged in parallel.

4. The battery replacement accessory according to claim 3, characterized in that: A mounting plate for mounting the quick-change device is provided on the front side of the attachment body, and the left and right ends of the lower bolt block extend to the left and right sides of the mounting plate, and guide blocks are installed on the left and right ends of the lower bolt block; vertical slide rails are provided on the left and right sides of the mounting plate, and the guide block and the end of the lower bolt block form a guide groove that is compatible with the vertical slide rail; the guide device is composed of the vertical slide rail and the guide groove.

5. The battery replacement accessory according to claim 4, characterized in that: The cross section of the upper plug is a trapezoid, and the cross section of the lower plug is an inverted trapezoid.

6. The battery replacement accessory according to claim 5, characterized in that: The cross sections of the upper plug and the lower plug are both right-angled trapezoids, and the waist edges facing the front are vertical edges.

7. The battery replacement accessory according to claim 1, characterized in that: The attachment body comprises: A connecting seat, the rear of which is provided with an articulated seat for connecting the attachment to the attachment-carrying equipment; A sway frame connected to the front side of the connecting seat via a sway drive mechanism, wherein the sway drive mechanism is configured to drive the sway frame to swing left and right around a vertical axis on the connecting seat; A transverse sliding frame is slidably disposed on the front side of the transverse swing frame through a transverse sliding driving mechanism, wherein the transverse sliding driving mechanism is configured to be able to drive the transverse sliding frame to slide left and right on the transverse swing frame; A vertical swing frame, connected to the front side of the horizontal sliding frame through a vertical swing drive mechanism, wherein the vertical swing drive mechanism is configured to drive the vertical swing frame to swing left and right around a horizontal axis on the horizontal swing frame; The quick-change device is installed on the front side of the vertical swing frame.

8. The battery replacement accessory according to claim 7, characterized in that; The sway drive mechanism includes a sway oil cylinder, a sway rear articulated seat and a sway front articulated seat respectively arranged on the front side of the connecting seat and the rear side of the sway frame, the sway front articulated seat and the sway rear articulated seat are rotatably connected via a sway articulated pin shaft arranged vertically; the sway oil cylinder is used to push the sway frame to rotate around the sway articulated pin shaft, and its two ends are respectively connected to the connecting seat and the sway frame; The transverse sliding drive mechanism includes a transverse sliding cylinder and a horizontal slide groove and a horizontal slide rail respectively arranged on the transverse swing frame and the transverse sliding frame and cooperating with each other; the transverse sliding cylinder is used to push the transverse sliding frame to slide left and right, and its two ends are respectively connected to the transverse swing frame and the transverse sliding frame; The vertical swing driving mechanism includes a rotating connection mechanism and a rotating driving device, wherein the rotating connection mechanism is used to rotationally connect the vertical swing frame and the transverse sliding frame, and the rotating driving device is used to drive the vertical swing frame to swing left and right around the rotating connection mechanism relative to the transverse sliding frame.

9. A power battery, characterized in that: A connecting device is arranged on a vertical side surface of the power battery case, and the connecting device is connected and used in conjunction with the quick-change device of the battery replacement accessory according to any one of claims 1 to 8. The connecting device includes an upper hook and a lower hook fixed on the power battery case, and the upper hook is provided with an upper bolt groove with a notch facing downward for the upper bolt to be inserted; the lower hook is provided with a lower bolt groove with a notch facing upward for the lower bolt to be inserted.

10. The power battery according to claim 9, characterized in that: A lower hook is arranged directly below each upper hook.

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