A battery box quick replacement device for an electric reach stacker

Abstract

The utility model relates to the field of the front -slewing crane battery replacement, concretely is a kind of electric front -slewing crane battery box quick replacement device, including battery box, bottom support and connecting mechanism, the connecting mechanism battery replacement plug, battery replacement socket, second electric push cylinder, battery replacement socket mounting plate and battery replacement plug mounting plate;Second electric push cylinder is set in the bottom support by cushion block, the cylinder rod of second electric push cylinder is connected battery replacement socket mounting plate by second floating joint, battery replacement socket mounting plate is provided with battery replacement socket, battery replacement socket is electrically connected with the motor of electric front -slewing crane;Battery replacement plug mounting plate is set in the battery box, battery replacement plug is set in battery replacement plug mounting plate, battery replacement plug is electrically connected with the battery box.The utility model inserts and pulls battery replacement interface by electric push cylinder control, and the strength is smaller, compared with when replacing battery box directly inserting and pulling battery replacement interface, the service life of each component is increased, so that it is not easy to damage.

Description

Technical Field

[0001] This utility model relates to the field of front-mounted battery replacement, specifically a quick-change device for an electric front-mounted battery box. Background Technology

[0002] A reach stacker is a type of crane used for loading and unloading containers. It is specifically designed for 20-foot and 40-foot international containers and is primarily used for container stacking and horizontal transport within terminals and yards. Compared to forklifts, it offers advantages such as maneuverability, ease of operation, good stability, lower wheel pressure, higher stacking depth, and higher yard utilization. It can perform straddle container operations. It is particularly suitable for container loading and unloading in small and medium-sized ports, railway stations, and highway depots, and can also be used as auxiliary equipment in large container terminals.

[0003] Under the call of low-carbon policies, reach stackers are now abandoning fuel power and shifting to pure electric power. Current pure electric reach stackers all use direct-charging battery boxes, meaning the cables between the battery box and the motor are securely fixed. However, the biggest drawback of this method is the excessively long charging time, often 1-2 hours. This significantly wastes workers' time and greatly reduces the economic efficiency of using the reach stacker.

[0004] Patent search revealed that patent CN202011017597.2, concerning a quick-change device for an electric front-mounted crane battery box, proposes a quick-change power battery pack device, including a battery pack, a battery pack bracket, a positioning mechanism, and a locking mechanism. The battery pack is placed on the battery pack bracket, and the positioning and locking mechanisms achieve positioning and fixation of the battery pack relative to the battery pack bracket, thereby enabling quick battery pack replacement. This patent has the following shortcomings:

[0005] 1. The battery pack capacity is too small to meet the daily use of front-mounted cranes;

[0006] 2. This device can only be charged via the battery swapping interface, so a special charging device is required.

[0007] 3. During the process of placing the battery pack into the battery rack, the insertion and extraction forces on the quick-switch interface of the battery pack and the quick-switch interface on the battery rack are large, which can easily cause damage. Utility Model Content

[0008] The purpose of this invention is to provide a quick-change device for an electric front-mounted battery box, thereby solving the problems mentioned in the background art.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a quick battery box replacement device for an electric front-end crane, comprising a battery box and a base, wherein the base is disposed on the crossbeam of the frame of the electric front-end crane, and the battery box is detachably disposed above the base via a positioning mechanism and a locking mechanism, characterized in that: it further comprises a connecting mechanism disposed on the side of the base, comprising a battery swapping plug, a battery swapping socket, a second electric push cylinder, a battery swapping socket mounting plate, and a battery swapping plug mounting plate; the second electric push cylinder is disposed on the base via a pad, and the cylinder rod of the second electric push cylinder is connected to the battery swapping socket mounting plate via a second floating joint, the battery swapping socket is disposed on the battery swapping socket mounting plate, and the battery swapping socket is electrically connected to the motor of the electric front-end crane; the battery swapping plug mounting plate is disposed on the battery box, the battery swapping plug is disposed on the battery swapping plug mounting plate, and the battery swapping plug is electrically connected to the battery box.

[0010] Preferably, the battery box includes a battery box frame, battery packs, a thermal management unit, a BMS control box, a PDU junction box, an expansion tank, a charging socket, and a sealing plate. The battery box frame is welded from rectangular steel pipes, with fork slots welded to the bottom. Multiple battery pack base supports are provided inside, with one battery pack placed on each base support. The thermal management unit is located in the bottom space inside the battery box frame, near the frame edge. The BMS control box, the PDU junction box, and the charging socket are all electrically connected to the battery packs and are located in the upper space inside the battery box frame, near the frame edge. The expansion tank is located on the outer top of the battery box frame. The sealing plate is located on the outer surface of the battery box frame, serving to protect the internal components.

[0011] Preferably, the battery box frame has 15 battery packs arranged vertically in layers, with the following layer number and spatial distribution: first, fifth, and sixth layers: two battery packs each; second to fourth layers: three battery packs each; the spacing between adjacent battery packs is equal; the thermal management unit is on the same layer as the battery packs in the first layer; the charging socket is on the same layer as the battery packs in the fifth layer and is located above the battery packs in the fourth layer; the BMS control box and the PDU junction box are on the same layer as the battery packs in the sixth layer.

[0012] Preferably, the positioning mechanism includes a positioning pin and a positioning pin hole that cooperate with each other. The positioning pin hole is located on the bottom surface of the battery box, and the positioning pin is located on the top surface of the base. The top of the positioning pin is conical and is used to guide the battery box during installation.

[0013] Preferably, the locking mechanism is provided in multiple forms and evenly distributed around the base. The locking mechanism includes a locking pin support frame, a first electric push cylinder, a locking pin, a locking hole plate, and a proximity switch. The locking pin support frame is disposed on the base. The first electric push cylinder and the proximity switch are both disposed above the locking pin support frame. The cylinder rod of the first electric push cylinder is connected to the locking pin through a first floating joint. The locking pin engages with a guide hole disposed above the locking pin support frame. The locking hole plate is disposed on the bottom outer side of the battery box and has a locking hole through which the locking pin passes. The locking hole and the proximity switch are sequentially located in the extension direction of the cylinder rod of the first electric push cylinder. The proximity switch is used to detect whether the locking pin has extended to the correct position.

[0014] Preferably, the base is welded from plates, channel steel and angle steel, and the top surface of the base is uniformly provided with shock-absorbing pads, which play a shock-absorbing and buffering role during the installation of the battery box.

[0015] Preferably, it also includes a height-limiting bracket, which is welded from plates and square steel tubes and is installed on the crossbeam of the vehicle frame to prevent the battery box from colliding with other components of the electric front-end crane during the replacement process.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. Compared with the existing direct-charging electric front-end crane, this utility model has higher energy replenishment efficiency. It only takes about 15 minutes to replace the battery box, instead of waiting for 1 to 2 hours for long charging. Furthermore, the insertion and removal of the battery swapping interface is controlled by an electric push cylinder, which requires less force. Compared with directly plugging and unplugging the battery swapping interface when replacing the battery box, this increases the service life of each component and makes it less prone to damage.

[0018] 2. The battery pack and various electrical functional components of this utility model are reasonably distributed inside the battery box. Compared with the prior art, the battery capacity is larger, and one battery box can meet the daily use of an electric front-end crane.

[0019] 3. This utility model can be charged using a charging station, resulting in low operating costs; and because the battery box can be easily disassembled, its maintenance is also more convenient. Attached Figure Description

[0020] Figure 1 This is an overall schematic diagram of the electric front-mounted crane battery box quick-change device;

[0021] Figure 2 This is a structural diagram of the battery box from one perspective after the sealing plate has been removed;

[0022] Figure 3This is a schematic diagram of the battery box from another perspective after the sealing plate has been removed;

[0023] Figure 4 This is a schematic diagram of the base structure;

[0024] Figure 5 This is a schematic diagram of the locking mechanism;

[0025] Figure 6 This is a schematic diagram of the connecting mechanism. Detailed Implementation

[0026] Please see Figures 1 to 6 This utility model discloses a quick-change device for an electric front-mounted battery box, including a battery box 1, a base 2, a positioning mechanism, a locking mechanism 4, a connecting mechanism 5, and a height-limiting bracket 6.

[0027] like Figure 1 As shown, the base support 2 is mounted on the crossbeam of the electric forward crane frame, providing support for the battery box 1. The battery box 1 is detachably mounted above the base support 2 via a positioning mechanism and a locking mechanism 4, providing power to the entire electric forward crane. During the replacement of the battery box 1, the positioning mechanism is used to position the battery box 1 relative to the base support 2, and the locking mechanism 4 is used to lock the battery box 1 and the base support 2 after the battery box 1 is placed on the base support 2, limiting the height of the battery box 1 and preventing it from jumping around during vehicle movement.

[0028] like Figure 4 As shown, the connecting mechanism 5 is located on the side of the base 2 to realize the connection and disconnection of the power swap plug 58 and the power swap socket 53. The power swap plug 58 is electrically connected to the battery box 1, and the power swap socket 53 is electrically connected to the motor of the electric front crane. This enables the old battery box to be disconnected and the new battery box to be connected in time when the battery box is replaced, and the power of the new battery box 1 to be transmitted to the motor of the electric front crane.

[0029] like Figure 1 As shown, the height limit bracket 6 is welded from plate and square tube steel and installed on the crossbeam of the vehicle frame to prevent the battery box 1 from colliding with other parts of the electric front-end crane during the replacement process.

[0030] See Figure 2 The battery box 1 includes a battery box frame 11, a fork slot 12, a battery pack base 13, a battery pack 14, a thermal management unit 15, a BMS control box 16, a PDU junction box 17, an expansion tank 18, a charging socket 19, a connecting bracket 110, and a sealing plate 111.

[0031] The battery box frame 11 is constructed from welded rectangular steel tubes. Figure 2From the front view, the outer contour of the battery box frame 11 is a heptagon. The fork slot 12 consists of two rectangular steel pipes welded to the bottom of the battery box frame 11, facilitating the insertion of the forklift's forks.

[0032] The battery pack base 13 is placed inside the battery box frame 11 and connected to the battery box frame 11 by the connecting bracket 110. Each battery pack base 13 has a corresponding battery pack 14 placed on it. In this embodiment, 15 battery packs 14 are arranged in layers along the vertical direction inside the battery box frame 11. The number of layers and the spatial distribution are as follows: First layer, fifth layer, and sixth layer: two battery packs 14 are arranged in each layer; second layer to fourth layer: three battery packs 14 are arranged in each layer. The spacing between two adjacent battery packs 14 is equal.

[0033] The thermal management unit 15 is located in the bottom space inside the battery box frame 11 and near the edge of the frame, responsible for providing cooling and heating for the entire battery pack 14. In this embodiment, the thermal management unit 15 is on the same layer as the first layer of the battery pack 14, located in... Figure 2 The lower right corner inside the battery box frame 11 in the main view.

[0034] The BMS control box 16, the PDU junction box 17, and the charging socket 19 are all electrically connected to the battery pack 14 and are located in the upper space inside the battery box frame 11, near the edge of the frame. In this embodiment, the charging socket 19 is on the same layer as the fifth layer of the battery pack 14 and is located above the fourth layer of the battery pack 14, that is, the charging socket 19 is located at... Figure 2 The upper right corner of the battery box frame 11 in the main view is responsible for connecting to external charging facilities; the BMS control box 16 and the PDU junction box 17 are on the same layer as the sixth layer battery pack 14, located in... Figure 2 The upper right corner inside the battery box frame 11 in the main view is responsible for ensuring stable power supply to the equipment and optimizing energy efficiency.

[0035] The expansion tank 18 is placed on the top of the battery box frame 11 and is responsible for replenishing cooling water, regulating system pressure and accommodating liquid expansion. The sealing plate 111 is installed on the outer surface of the battery box frame 11 and serves to protect the internal components of the frame. It can protect against rain and sun while also having an aesthetic effect.

[0036] like Figure 4 As shown, the base 2 is welded from plates, channel steel and angle steel. Shock-absorbing pads 21 are evenly installed on the support surface of the base 2. The shock-absorbing pads 21 play a shock-absorbing and buffering role during the installation of the battery box 1.

[0037] The positioning mechanism includes a positioning pin 31 and a positioning pin hole 32, such as Figure 3 and Figure 4As shown. The top of the positioning pin 31 is conical to facilitate the guidance of the battery box 1 during installation. There are four positioning pins 31 in total, which are evenly welded to the base 2. There are also four positioning pin holes 32 in total, which are evenly distributed at the bottom of the battery box 1. The positioning of the battery box 1 relative to the base 2 is achieved by the cooperation of these four positioning pins 31 and positioning pin holes 32.

[0038] like Figure 1 As shown, in this embodiment, there are four locking mechanisms 4, evenly arranged around the base 2 and installed on the base 2. (See reference...) Figure 5 The locking mechanism 4 includes a locking pin support frame 41, an electric push cylinder bracket 42, a first electric push cylinder 43, a first floating joint 44, a locking pin 45, a lock hole plate 46, and a proximity switch 47.

[0039] The locking pin support frame 41 is welded to the base 2. The electric push cylinder bracket 42 and the proximity switch 47 are mounted on the locking pin support frame 41, and the first electric push cylinder 43 is mounted on the electric push cylinder bracket 42. One end of the first floating joint 44 is connected to the cylinder rod of the first electric push cylinder 43, and the other end is connected to the locking pin 45. The locking pin support frame 41 is provided with two guide holes, and the locking pin 45 mates with these two guide holes. The main function of the first floating joint 44 is to prevent the locking pin 45 from jamming due to manufacturing errors, assembly errors, and wear.

[0040] A lock hole plate 46 is disposed on the bottom outer side of the battery box 1, and has a lock hole 461 through which the locking pin 45 passes. The lock hole 461 and the proximity switch 47 are located sequentially in the extension direction of the cylinder rod of the first electric push cylinder 43. The cylinder rod of the first electric push cylinder 43 drives the locking pin 45 to extend. When the locking pin 45 moves into the lock hole 461 and exceeds the lock hole plate 46, the height of the battery box 1 is limited. The proximity switch 47 is used to detect whether the locking pin 45 has extended to the correct position.

[0041] See Figure 6 The connecting mechanism 5 includes a pad 51, a second electric push cylinder 52, a battery swapping socket 53, a battery swapping socket mounting plate 54, a second floating joint 55, a guide rod 56, a guide sleeve 57, a battery swapping plug 58, and a battery swapping plug mounting plate 59.

[0042] A pad 51 is mounted on the base 2, and a second electric push cylinder 52 is mounted on the pad 51. One end of the second floating joint 55 is connected to the cylinder rod of the second electric push cylinder 52, and the other end is connected to the battery swapping socket mounting plate 54. The main function of the second floating joint 55 is to prevent the cylinder rod of the second electric push cylinder 52 from jamming due to manufacturing errors, assembly errors, and wear.

[0043] The battery swapping socket 53 is mounted on the battery swapping socket mounting plate 54. The battery swapping socket 53 is electrically connected to the motor of the electric front-end crane. The battery swapping plug mounting plate 59 is welded to the battery box 1, and the battery swapping plug 58 is mounted on the battery swapping plug mounting plate 59.

[0044] Both sides of the battery swapping socket mounting plate 54 are provided with a set of guide rods 56 and guide sleeves 57. The guide rods 56 are mounted on the base 2; the guide sleeves 57 are made of plastic or brass, are mounted on the battery swapping socket mounting plate 54, and cooperate with the guide rods 56. Their function is to assist the raising and lowering of the battery swapping socket mounting plate 54, and to facilitate replacement after wear. The cylinder rod of the second electric push cylinder 52 drives the battery swapping socket 53 to move in the direction of the guide rods 56, realizing the connection between the battery swapping plug 58 and the battery swapping socket 53.

[0045] Based on the above structure, the replacement steps for battery box 1 are as follows:

[0046] Disassembling battery box 1: The cylinder rods of the first electric push cylinder 43 of the driving locking mechanism 4 and the second electric push cylinder 52 of the connecting mechanism 5 retract to the bottom, thereby unlocking the locking mechanism 4 and separating the battery swap plug 58 and the battery swap socket 53 of the connecting mechanism 5. Then, the forklift forks are inserted into the fork slot 12, and the battery box 1 is raised to contact the limit bracket 6. Then, the battery box 1 is moved horizontally and lifted out.

[0047] Install battery box 1: Prepare a fully charged identical battery box 1, insert the forklift's forks into the fork slot 12, raise the battery box 1 to the height limit of the limit bracket 6, then align the positioning pin hole 32 of the battery box 1 with the positioning pin shaft 31 of the base 2, and then slowly lower the height of the battery box 1 until the bottom surface of the battery box 1 presses against the shock-absorbing pad 21. Then, drive the first electric push cylinder 43 of the locking mechanism 4 and the second electric push cylinder 52 of the connecting mechanism 5 to extend their cylinder rods to the end, thereby locking the locking mechanism 4 and connecting the battery swap plug 58 and the battery swap socket 53 of the connecting mechanism 5.

[0048] In summary, compared with existing direct-charging electric front-end cranes, this utility model has higher energy replenishment efficiency, requiring only about 15 minutes to replace the battery box, instead of waiting 1-2 hours for a long charging process; the battery capacity is large enough to meet the needs of front-end cranes; it can be charged using charging piles, resulting in low operating costs; the battery swapping interface requires less insertion and removal force, making it less prone to damage; and the battery box can be easily disassembled, making battery box maintenance more convenient.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick-change device for a battery box of an electric front-end crane, comprising a battery box (1) and a base (2), wherein the base (2) is disposed on the crossbeam of the frame of the electric front-end crane, and the battery box (1) is detachably disposed above the base (2) via a positioning mechanism and a locking mechanism (4), characterized in that: It also includes a connecting mechanism (5), which is located on the side of the base (2) and includes a battery swapping plug (58), a battery swapping socket (53), a second electric push cylinder (52), a battery swapping socket mounting plate (54), and a battery swapping plug mounting plate (59). The second electric push cylinder (52) is located on the base (2) via a pad (51). The cylinder rod of the second electric push cylinder (52) is connected to the battery swapping socket mounting plate (54) via a second floating joint (55). The battery swapping socket (53) is located on the battery swapping socket mounting plate (54) and is electrically connected to the motor of the electric front-end crane. The battery swapping plug mounting plate (59) is located on the battery box (1), and the battery swapping plug (58) is located on the battery swapping plug mounting plate (59) and is electrically connected to the battery box (1).

2. The electric front-mounted crane battery box quick-change device according to claim 1, characterized in that: The battery box (1) includes a battery box frame (11), battery packs (14), a thermal management unit (15), a BMS control box (16), a PDU junction box (17), an expansion tank (18), a charging socket (19), and a sealing plate (111); the battery box frame (11) is welded from rectangular steel pipes, with a fork slot (12) welded to the bottom, and multiple battery pack base supports (13) are provided inside, with one battery pack (14) placed on each battery pack base support (13); the thermal management unit (15) is equipped with The BMS control box (16), the PDU junction box (17), and the charging socket (19) are all electrically connected to the battery pack (14) and are located in the bottom space inside the battery box frame (11) and near the edge of the frame. The expansion tank (18) is located on the top outer side of the battery box frame (11). The sealing plate (111) is located on the outer surface of the battery box frame (11) and serves to protect the internal components of the frame.

3. The electric front-mounted crane battery box quick-change device according to claim 2, characterized in that: The battery box frame (11) has 15 battery packs (14) arranged vertically in layers, with the following layer number and spatial distribution: First layer, fifth layer, and sixth layer: two battery packs (14) are arranged in each layer; second layer to fourth layer: three battery packs (14) are arranged in each layer, with equal spacing between adjacent battery packs (14); the thermal management unit (15) is on the same layer as the battery packs (14) in the first layer; the charging socket (19) is on the same layer as the battery packs (14) in the fifth layer and is located above the battery packs (14) in the fourth layer; the BMS control box (16) and the PDU junction box (17) are on the same layer as the battery packs (14) in the sixth layer.

4. The electric front-mounted crane battery box quick-change device according to claim 1, characterized in that: The positioning mechanism includes a positioning pin (31) and a positioning pin hole (32) that cooperate with each other. The positioning pin hole (32) is located on the bottom surface of the battery box (1), and the positioning pin (31) is located on the top surface of the base (2). The top of the positioning pin (31) is conical and is used to guide the battery box (1) during installation.

5. The electric front-mounted crane battery box quick-change device according to claim 1, characterized in that: The locking mechanism (4) is provided in multiple parts and evenly distributed around the base (2). The locking mechanism (4) includes a locking pin support frame (41), a first electric push cylinder (43), a locking pin (45), a locking hole plate (46), and a proximity switch (47). The locking pin support frame (41) is located on the base (2). The first electric push cylinder (43) and the proximity switch (47) are both located above the locking pin support frame (41). The cylinder rod of the first electric push cylinder (43) passes through a first floating joint ( 44) Connect the locking pin (45), the locking pin (45) cooperates with the guide hole provided above the locking pin support frame (41); the locking hole plate (46) is provided on the bottom outer side of the battery box (1), and has a locking hole (461) for the locking pin (45) to pass through; the locking hole (461) and the proximity switch (47) are located in the extension direction of the cylinder rod of the first electric push cylinder (43) in sequence, and the proximity switch (47) is used to detect whether the locking pin (45) is extended into place.

6. The electric front-mounted crane battery box quick-change device according to claim 1, characterized in that: The base (2) is welded from plates, channel steel and angle steel. The top surface of the base (2) is uniformly provided with shock-absorbing pads (21). The shock-absorbing pads (21) play a shock-absorbing and buffering role in the installation of the battery box (1).

7. The electric front-mounted crane battery box quick-change device according to claim 1, characterized in that: It also includes a height-limiting bracket (6), which is welded from plate and square tube steel and is installed on the crossbeam of the vehicle frame to prevent the battery box (1) from colliding with other components of the electric front-end crane during the replacement process.

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