CN108502812B - Fork truck and integral type battery box thereof - Google Patents

Abstract

The invention relates to a forklift and an integrated battery box thereof. The integrated battery box of the forklift is provided with a mounting cavity with an opening at the side edge, the battery box is arranged in the mounting cavity from the opening at the side edge, and after the battery box is arranged in the mounting cavity, the mechanical connection between the lithium battery box and the forklift is realized through the locking mechanism on one hand, and the circuit connection between the battery box and the electric control mechanism on the forklift is realized through the plug-in device on the other hand. A forklift is provided with the integrated battery box. The integrated battery box is arranged on the vehicle body in a drawing mode, mechanical positioning between the battery box and the vehicle body is achieved through the locking mechanism, and electric connection between the battery box and a fork workshop is achieved through the plug-in device. The battery box is convenient to disassemble, assemble and replace.

Description

Fork truck and integral type battery box thereof

Technical Field

The invention relates to a forklift, in particular to a forklift suitable for small-space operation and an integrated battery box thereof.

Background

Fork trucks are industrial transportation vehicles, and are various wheeled transportation vehicles that perform handling, stacking, and short-distance transportation operations on pallet goods.

The forklift needs to work in a small space, and for this type of forklift, the size of the forklift needs to be reduced as much as possible for the flexibility of operation and the requirement on the working space, however, the size of the forklift is reduced, so that the operation space of a driver is also reduced, and the operation comfort of an operator is affected. In addition, the low-volume forklift is relatively compact in layout due to the limitation of design space, and is quite inconvenient for detection, repair and maintenance.

Meanwhile, the existing forklift adopting battery power supply generally adopts lead-acid batteries. Because of the large volume of lead acid batteries, the batteries are typically located on a forklift near the cockpit below the driver's seat. Therefore, on one hand, the space occupied by the battery is large, so that the volume of the forklift is large; on the other hand, the battery is replaced by the aid of a crane, so that the battery is very inconvenient.

On the other hand, as shown in fig. 5, the electric forklift in the prior art generally uses mechanical steering as the main steering, and is hydraulic power steering based on a main oil path, and the steering mechanism is connected under a steering wheel through a universal joint, which is the most widely used hydraulic steering connection structure design at present. And the steering wheel is rotated to finally drive the steering gear to rotate, and the assistance is directly provided by a mechanical-hydraulic-mechanical mode. Such steering means must rely on the power of the pump motor so that the pump motor is constantly operating, which is wasteful in terms of energy consumption, and the torque of the hand turning steering wheel is quite large, which is quite tiring for a long-term worker. Another is electronic power steering in which the steering motor is added alone. However, the former has excessive energy consumption and poor operability, and the latter is mostly applied to single-drive three-pivot forklifts at present due to mechanical structure limitations.

Disclosure of Invention

In order to solve the problems, the invention aims to provide a forklift and an integrated battery box thereof, wherein the volume of the battery box is small, the battery box is installed on the forklift in a pulling mode and is locked with a forklift body through a locking mechanism, the battery box is electrically connected with an electric control mechanism on the forklift through a plug-in device, and the battery box is convenient to disassemble, assemble and replace.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the integrated battery box of the forklift is characterized in that an installation cavity (12) for installing the lithium battery box (71) is formed in the forklift body (1), an opening for the pull-out type installation or pull-out of the lithium battery box is formed in the left side or the right side of the installation cavity (12), and after the lithium battery box is installed in the installation cavity, mechanical connection between the lithium battery box (71) and the forklift body (1) is realized through a locking mechanism on one hand, and circuit connection between the battery box and an electric control mechanism (7) on the forklift is realized through a plug-in device (73) on the other hand; the battery box body is provided with an external power supply socket, the position of the power supply socket on the battery box is fixed, the vehicle body is provided with an electric interface, the position of the electric interface on the vehicle body is fixed, at least an anode contact and a cathode contact are arranged in the electric interface, and the anode contact and the cathode contact are connected in series with an electric control mechanism on the forklift; the plug device (73) is in plug fit with a vehicle body, a power contact (731) and an electric control contact (732) are arranged on the plug device, the power contact (731) is in plug fit with a power supply socket on the battery box (71), the electric control contact (732) is in plug fit with an electric interface on the vehicle body, the power contact (731) and the electric control contact (732) are in conductive connection in the plug device, and the plug direction of the electric control contact (731), the plug direction of the power contact (732) and the plug direction of the plug device are consistent.

As a preferable technical scheme, a sliding guide device is arranged between the battery box and the mounting cavity.

As a preferred technical scheme, the sliding guide device comprises a plurality of rollers (121) arranged at the bottom of the installation cavity, wherein the rollers (121) are distributed on a moving route of the battery box relative to the installation cavity (12), and the bottom of the battery box is contacted with a rolling plane of the rollers in the process of loading or unloading the battery box; the slide guide device further includes a guide rail guiding the battery box.

As a preferred technical scheme, the locking mechanism comprises a plug (712) arranged on the battery box and a slot (122) arranged on the vehicle body and used for the plug (712) to be clamped in, the plug (712) can slide up and down relative to the plug seat (713) to enable the plug (712) to be inserted into the slot (122) or enable the plug to be separated from the slot (122), and the locking mechanism further comprises a positioning assembly for enabling the plug (712) to be kept to be inserted into the slot (122) or separated from the slot (122).

As the preferable technical scheme, be equipped with bolt seat (713) in battery case (71), bolt (712) are fixed on battery case (71) through bolt seat (713), and the up end of bolt (712) is exposed from the up end of battery case (71) all the time, and the lower extreme of battery case is equipped with the trompil that is used for bolt (712) to wear out downwards, and slot (122) are located the automobile body and install the chamber bottom, and after the battery case was packed into installation cavity (12) completely, the trompil aligns with slot (122).

As a preferable technical scheme, the positioning assembly comprises a positioning column (715) connected with the bolt and a positioning groove arranged on the battery box (71), and before the positioning column (715) is clamped into the positioning groove, the positioning column (715) lifts the bolt (712) to keep a state of being separated from the slot due to the limitation of the upper end face of the battery box; the positioning column (715) rotates to the positioning groove, and the positioning column is clamped into the positioning groove downwards to drive the bolt (712) to be clamped into the slot.

As the preferable technical scheme, the plug-in device is provided with a hand-held part.

As the preferable technical scheme, a contactor is connected in series in a connecting loop of the plug-in device and the electric control mechanism.

As a preferable technical scheme, the battery box is provided with a step.

The invention also discloses a forklift with the battery box.

A forklift comprising an integrated battery box of a forklift as claimed in any one of the preceding claims.

The integrated battery box is arranged on the vehicle body in a drawing mode, mechanical positioning between the battery box and the vehicle body is achieved through the locking mechanism, and electric connection between the battery box and a fork workshop is achieved through one-time plug of the plug-in device. The battery box is convenient to disassemble, assemble and replace.

Drawings

Fig. 1 is a schematic structural diagram of a forklift in the present invention.

Fig. 2 is a schematic structural view of another side of the forklift in the present invention.

Fig. 3 is a schematic layout of the components on the vehicle body.

Fig. 4 is a schematic diagram of a connection structure of a driving mechanism in the present invention.

Fig. 5 is a schematic block diagram of a forklift steering in the prior art.

Fig. 6 is a schematic view of a hydraulic power steering connection structure according to the present invention.

Fig. 7 is a schematic block diagram of hydraulic power steering in the present invention.

Fig. 8 is a block diagram of a battery box and a plug-in unit according to the present invention.

Fig. 9 is a schematic structural view of a locking mechanism in the present invention.

Fig. 10 is a schematic diagram of connection between the battery box and the electric control part through a plug-in device.

Fig. 11 is a schematic view of the installation of the vehicle body and the upper and lower counterweights.

Fig. 12 is an enlarged view of D in fig. 11.

Wherein: 1. the vehicle body, 11, the partition, 12, the upper counterweight, 14, the lower counterweight, 15, the rear side plate, 16, the seat support, 2, the lifting mechanism, 21, the jack, 22, the fork, 3, the safety shed, 4, the cabin, 41, the seat, 42, the mechanism, 421, the steering gear, 5, the driving mechanism, 51, the driving wheel, 52, the driving gearbox, 53, the motor 54, the electromagnetic brake, 6, the steering mechanism, 61, the steering axle, 62, the steering wheel, 63, the steering potentiometer, 64, the EPS motor, 65, the EPS controller, 7, the electric control mechanism, 71, the lithium battery box, 711, the step 712, the latch, 713, the latch seat, 714, the copper bush, 715, the positioning post, 716, the handle, 72, the controller, 73, the latch, the power contact, 732, the 74, the connecting cable, 75, the contactor, 8, the hydraulic mechanism, 81, the oil tank, 82, the electromagnetic valve, 83, the gear pump, the oil tank, the pump motor, 85, the hydraulic station,

Detailed Description

Preferred embodiments of the present patent are described in further detail below with reference to the accompanying drawings. Wherein the direction indicated by the arrow in the figure is the front side of the vehicle body.

The lithium battery forklift shown in fig. 1 and 2 comprises a forklift body 1, wherein a lifting mechanism 2 is arranged on the front side of the forklift body 1, and the lifting mechanism 2 comprises a lifting frame 21 and a fork 22 arranged on the lifting frame in a lifting manner. A cabin 4 is provided above the vehicle body 1, and a seat 41 and an operating mechanism 42 fixed to the vehicle body 1 are provided in the cabin 4. In this embodiment, a safety shed 3 is arranged outside the cockpit, and the safety shed 3 is fixed above the vehicle body 1. The lower part of the vehicle body 41 is provided with a driving mechanism 5, a steering mechanism 6, an electric control mechanism 7 and a hydraulic mechanism 8.

The lithium battery forklift in the embodiment adopts a three-fulcrum structure with double front wheels for driving and double side-by-side steering. The three-pivot forklift is a forklift with three supporting points for supporting the weight of the whole forklift, wherein the three supporting points are two supporting points formed by two front wheels and one supporting point in the middle of the rear of the forklift. Compared with a four-fulcrum forklift, the three-fulcrum forklift has the same stability, but the three-fulcrum forklift is more flexible in steering, and particularly the flexibility can be embodied when the three-fulcrum forklift is steered in 360 degrees in a small space. The driving power of the double front wheels is strong, and the climbing capacity is strong.

As shown in fig. 3, a drive mechanism 5 is mounted on the front of the vehicle body, and includes a drive wheel 51, and a drive transmission 52, a drive motor 53, and an electromagnetic brake 54, which are connected to the two drive wheels 51, respectively. An output shaft of the drive motor 53 is connected to an electromagnetic brake 54 and a drive gearbox 52, and the drive gearbox 52 is connected to the drive wheel 51. The operating mechanism 42 is electrically connected with the electromagnetic brake 54, and the forklift adopts the electronic power-assisted brake to brake the forklift, so that the forklift is stable in performance, safe and reliable.

As shown in fig. 3, 6 and 7, the steering mechanism 6 is used to implement a forklift steering function. The steering mechanism includes a steering axle 61, two steering wheels 62, and a steering potentiometer 63. The steering axle 61 is installed in the middle of the rear side of the vehicle body 1, the steering axle 61 can rotate clockwise or anticlockwise under the action of a steering oil cylinder, the left and right end oil ports of the steering oil cylinder are respectively connected to the hydraulic mechanism 8, and the hydraulic mechanism 8 drives the steering axle 61 to rotate left and right. Two rotating wheels 62 are mounted on the steering axle 61 side by side left and right, and the steering axle 61 rotates to drive the rotating wheels 62 to rotate together. The steering potentiometer 63 is arranged at the upper end of the steering axle 61, the steering potentiometer 63 is connected with the electric control mechanism 7, the rotation angle of the steering wheel 63 is monitored in real time, when the steering potentiometer 63 collects that the steering wheel direction reaches a set angle, an angle signal is transmitted to the electric control mechanism, the electric control mechanism 7 limits the overflow of the control hydraulic mechanism 8, and therefore the steering wheel 62 cannot be oversteered. Generally, the predetermined angle is 90 °. Meanwhile, the electric control mechanism 7 can also adjust the running speed of the forklift after receiving the angle signal, and the turning deceleration function is achieved.

The hydraulic mechanism 8 is divided into a lifting oil way and a steering oil way, the lifting oil way comprises an oil tank 81, an electromagnetic valve 82, a gear pump 83 and a pump motor 84, the lifting oil way in the hydraulic mechanism 8 provides power for the lifting mechanism 2, the pump motor 84 is connected with the gear pump 83, the gear pump 83 is connected with the oil tank 81 through an oil pipe, and the gear pump 83 is connected to the lifting mechanism 2 through the electromagnetic valve 82. The pump motor 84 drives the gear pump 83 to work, the gear pump 83 takes oil from the oil tank 81, and the lifting mechanism 2 is controlled to work through the multi-way electromagnetic valve 82. The steering oil path provides a steering assist steering oil path for the steering mechanism 6, and comprises a hydraulic station 86 connected with an oil tank, wherein the hydraulic station 86 takes oil from the oil tank 81 and is connected to left and right end oil inlet and outlet ports of a steering oil cylinder in the steering mechanism for driving the steering axle to rotate through an oil pipe, and the steering axle 61 is driven to rotate through the oil pressure of the hydraulic station 86. All parts in the lifting oil way are arranged on the left side or the right side of the middle part of the vehicle body in a concentrated mode, a hydraulic station in the steering oil way is arranged on the rear side of the vehicle body and close to the steering mechanism, and the hydraulic station is connected to an oil tank in the lifting oil way through an oil pipe to take oil. The hydraulic mechanism further comprises an oil tank oil filler 85, wherein the oil tank oil filler is independent of the lifting oil way and exposed out of the vehicle body, so that oil can be conveniently filled in a mailbox through the oil tank oil filler.

The hydraulic station 86 is connected with a steering wheel 421 of the operating mechanism in a matched manner through an EPS motor 64 and an EPS controller 65, wherein the EPS motor 64 is arranged on a rotating shaft of the steering wheel 421, and the steering wheel 421 rotates and drives the rotating shaft of the EPS motor 64 to rotate, and the EPS motor in the embodiment is a stepping motor; the EPS controller 65 is mounted on the hydraulic station 86, the EPS controller 65 is connected to the hydraulic station 86, the EPS controller 65 receives a signal from the EPS motor 64 and presses oil into the left chamber or the right chamber of the steering cylinder according to the signal to control steering. In this embodiment, the pump motor 84 and the hydraulic station 86 independently control the lifting mechanism 2 and the steering mechanism 6, respectively, and have the following advantages compared with the conventional mechanical steering forklift: 1. the pump motor 84 does not need to work continuously at any time, so that the energy consumption and the noise can be effectively reduced; 2. the steering wheel 421 and the steering mechanism 6 are electrically connected, so that the steering of the steering wheel 421 is more flexible during operation.

As shown in fig. 4, the electric control mechanism 7 is connected with the operating mechanism 42, the hydraulic mechanism 8, the steering mechanism 6, the driving mechanism 5 and the lifting mechanism 2, and is used for controlling the functions of starting and stopping, advancing, retreating, steering angle, lifting of the fork and the like of the vehicle body. The electric control mechanism 7 comprises a lithium battery box 71 and a controller 72, the lithium battery box 71 supplies power for electric equipment such as a motor on the forklift, and the controller 72 receives signals of a signal acquisition device such as a steering potentiometer and controls the motor on the forklift to execute corresponding actions. To simplify the control of the motors, the electric control mechanism is provided with a plurality of controllers for controlling the drive motor 53 in the drive mechanism and the pump motor 84 in the hydraulic system, respectively. In the mounting position, the plurality of controllers 72 are provided centrally on the front side of the vehicle body 1 above the drive mechanism 5. In this way, the controller 72 is convenient to be subjected to fault investigation in the later stage, and the distance between the controller 72 and the motor can be reduced as far as possible, so that the length of the connecting cable 74 between the controller and the motor is shortened, the wiring is neat, and the use cost of the connecting cable can be reduced.

The lithium battery box 71 in the electric control mechanism 7 is arranged in the middle of the vehicle body and is arranged side by side with the lifting oil way in the hydraulic mechanism, and the installation positions of the two are separated by the partition 11. Each part on the vehicle body is tightly installed, the whole vehicle volume can be reduced, one side of the lifting oil path in the hydraulic mechanism is arranged on the vehicle body, and all parts in the lifting oil path can be exposed through the upper side plate of the lifting oil path, so that the fault detection is facilitated.

As shown in fig. 1, 2 and 11, the vehicle body 1 is provided with a mounting cavity 12 for mounting a lithium battery box, and an opening for drawing in or drawing out the battery box is provided on the left side or the right side of the mounting cavity 12. The drawing type means that the battery box is relatively moved in the horizontal direction relative to the vehicle body and is installed in or removed from the installation cavity of the vehicle body. Because the battery box has a large self weight, a sliding guide device is arranged between the battery box and the mounting cavity in order to facilitate pushing the battery box into the mounting cavity 12 or taking the battery box out of the mounting cavity 12. The sliding guide device in this embodiment includes a plurality of rollers 121 disposed at the bottom of the installation cavity, the rollers 121 are distributed on a moving path of the battery box relative to the installation cavity 12, and in the process of loading or unloading the battery box, the bottom of the battery box contacts with a rolling plane of the rollers to reduce friction between the battery box and the installation cavity. And a guide rail for guiding the battery box is arranged in the mounting cavity. After the battery box is installed in the installation cavity, mechanical connection between the lithium battery box 71 and the vehicle body 1 is realized through the locking mechanism on the one hand, and circuit connection between the battery box and the electric control mechanism 7 is realized through the plug-in device 73 on the other hand.

As shown in fig. 8, 9, 11 and 12, the locking mechanism in this embodiment includes a latch 712 provided on the battery box and a slot 122 provided on the vehicle body for the latch 712 to be snapped in, a latch seat 713 is provided in the battery box 71, the latch 712 is fixed on the battery box 71 by the latch seat 713, the upper end of the latch 712 is always exposed from the upper end face of the battery box 71, the lower end of the battery box is provided with an opening for the latch 712 to pass downward, the slot 122 is located at the bottom of the mounting cavity on the vehicle body, and after the battery box is completely loaded into the mounting cavity 12, the opening is aligned with the slot 122. The latch 712 can slide up and down with respect to the latch seat 713 to insert the latch 712 into the slot 122 or remove the latch from the slot 122, thereby achieving mechanical locking between the battery box 71 and the vehicle body 1. Preferably, the latch seat 713 is provided with a copper sleeve 714, and the latch 712 is inserted into the copper sleeve 714. The locking mechanism further includes a positioning assembly for maintaining the latch 712 in a state of being inserted into the slot 122 or out of the slot 122, and the positioning assembly in this embodiment includes a positioning post 715 and a positioning groove provided on the battery case 71. The bolt 712 can rotate around the axis of the bolt 712, the positioning column 715 rotates along with the bolt 712, a positioning groove matched with the positioning column 715 is positioned on the rotating path of the positioning column, and before the positioning column 715 is clamped into the positioning groove, the positioning column 715 is lifted up to keep the state of being separated from the slot due to the limitation of the upper end face of the battery box; the positioning column 715 rotates to the positioning groove, the positioning column is clamped into the positioning groove downwards, and the bolt 712 is clamped into the slot. The locating column and the locating groove are in interference fit, so that the locating column 715 is prevented from being separated from the locating groove due to shaking in the action process of the forklift, and the plug 712 is ensured to locate the battery box. In order to facilitate the operation of the latch, it is preferable that a handle 716 for driving the latch to move is fixed at the upper end of the latch, and the positioning column is also fixed on the handle.

As shown in fig. 8, the battery box body is provided with an outward power supply socket, the position of the power supply socket on the battery box is fixed, and the power supply socket and the power line of the lithium battery core in the battery box are all positioned in the battery box. As shown in fig. 10, the controllers 72 of the electric control mechanism on the forklift are connected in series with each other in positive and negative poles, the controllers are connected in series with a contactor 75, an electric interface is arranged on the forklift body, and at least positive and negative pole contacts are arranged in the electric interface and are connected in series with the controllers and the contactor. The electric interface is fixed at the position on the vehicle body, and connecting wires between the electric interface and the controller and between the electric interface and the contactor are all positioned in the vehicle body.

The plug 73 is in plug fit with the vehicle body, the plug is provided with a power contact 731 and an electric control contact 732, the power contact 731 is in plug fit with a power supply socket on the battery box 71, the electric control contact 732 is in plug fit with an electric interface on the vehicle body, the power contact 731 and the electric control contact 732 are in conductive connection in the plug, and the plug direction of the electric control contact 731, the plug direction of the power contact 732 and the plug direction of the plug are consistent. Because the battery box is positioned in the vehicle body, the power supply socket on the battery box and the electric interface on the vehicle body are staggered up and down or staggered front and back in the plugging direction of the plug-in device, and the corresponding electric control contact and the power contact are staggered up and down or staggered front and back in the plugging direction of the plug-in device. The plug-in device is provided with a hand-held part. The power contact and the electric control contact are connected in series to form a loop between the battery box and the controller as well as between the battery box and the contactor, and the contactor controls the battery box to supply power for the electric control mechanism of the vehicle body.

The circuit connection between the battery box and the controller can be realized by one-time plug through the plug-in device, and the contactor is arranged in the loop, so that the on-off of the loop is controlled through the contactor.

Since the cabin is located high on the vehicle body 1, a step is required to be provided for the driver to step into the cabin. Preferably, the battery box in this embodiment is formed with the step 711, so that no step is required to be additionally provided, and the structure is simple.

In the forklift of the present embodiment, since the conventional lead-acid battery is replaced with the lithium battery, and the lithium battery is arranged in the above-described structure on the car body, and the saddle is fixed to the rear side plate 15 of the car body by the saddle bracket 16, the installation space between the saddle lower side and the upper end of the battery chamber is large due to the high height of the saddle. Therefore, as shown in fig. 11, in the present embodiment, the weight is divided into two parts of an upper weight 13 and a lower weight 14, the upper weight 13 and the lower weight 14 are respectively of an integral structure, the upper weight 13 is provided in an installation space from the upper end of the vehicle body to below the seat, and the upper weight 13 is fixed to the front side of the rear side plate 15 of the vehicle body. The lower counterweight 14 is fixed to the rear side of the vehicle body upper rear side plate 15, and a notch for exposing the steering mechanism 6 is provided in the lower counterweight 14. The balancing weight is divided into an upper balancing weight and a lower balancing weight, and the upper balancing weight fully utilizes the installation space between the upper saddle of the vehicle body and the vehicle body, so that the whole vehicle is compact in structure; the upper counterweight and the lower counterweight are both positioned at the rear half part of the forklift, so that the balancing effect on the weight of the whole forklift is achieved. The upper counterweight and the lower counterweight are directly arranged on the forklift body to serve as a part of a structure of the forklift, and the shape of the upper counterweight is matched with the overall shape of the forklift, so that on one hand, the overall structure of the forklift is concise and attractive, meanwhile, the left side and the right side of the upper counterweight are equivalent to the outer side of the forklift cockpit or protrude out of the cockpit, and therefore, an anti-collision strip does not need to be arranged on the outer side of a cockpit saddle.

Preferably, the hydraulic station 86 in the hydraulic mechanism is fixed at the rear side of the saddle bracket 16 in this embodiment, so that the distance between the hydraulic station 86 and the steering mechanism 6 is small, which is beneficial to the alignment of the hydraulic pipes on the forklift. And a tank filler 85 in the hydraulic mechanism is also provided on the rear side of the seat frame 15, the tank filler being connected to the tank through a filler pipe, the tank filler 85 being exposed to the outside of the vehicle body 1 for facilitating filling into the tank. In this embodiment, a notch for exposing the tank filler 85 may be provided in the lower counterweight so that the tank filler is exposed to the outside of the vehicle body.

Claims (10)

1. The integrated battery box of the forklift truck is characterized in that an installation cavity (12) for installing a lithium battery box (71) is formed in the forklift truck body (1), an opening for the pull-in type installation or pull-out of the lithium battery box is formed in the left side or the right side of the installation cavity (12), and after the lithium battery box is installed in the installation cavity, mechanical connection between the lithium battery box (71) and the forklift truck body (1) is realized through a locking mechanism on one hand, and circuit connection between the battery box and an electric control mechanism (7) on the forklift truck is realized through a plug-in device (73) on the other hand; the battery box body is provided with an external power supply socket, the position of the power supply socket on the battery box is fixed, the vehicle body is provided with an electric interface, the position of the electric interface on the vehicle body is fixed, at least an anode contact and a cathode contact are arranged in the electric interface, and the anode contact and the cathode contact are connected in series with an electric control mechanism on the forklift; the plug device (73) is in plug fit with a vehicle body, a power contact (731) and an electric control contact (732) are arranged on the plug device, the power contact (731) is in plug fit with a power supply socket on the battery box (71), the electric control contact (732) is in plug fit with an electric interface on the vehicle body, the power contact (731) and the electric control contact (732) are in conductive connection in the plug device, and the plug direction of the electric control contact (732), the plug direction of the power contact (731) and the plug direction of the plug device are consistent.

2. The integrated battery compartment of claim 1, wherein a sliding guide is provided between the battery compartment and the mounting cavity.

3. The integrated battery box of the forklift truck according to claim 2, wherein the sliding guide device comprises a plurality of rollers (121) arranged at the bottom of the installation cavity, the rollers (121) are distributed on a moving route of the battery box relative to the installation cavity (12), and the bottom of the battery box is contacted with a rolling plane of the rollers during the process of loading or unloading the battery box; the slide guide device further includes a guide rail guiding the battery box.

4. The integrated battery box of the forklift truck according to claim 1, wherein the locking mechanism comprises a latch (712) arranged on the battery box and a slot (122) arranged on the truck body and used for the latch (712) to be clamped in, the latch (712) can slide up and down relative to the latch seat (713) to enable the latch (712) to be inserted into the slot (122) or enable the latch to be separated from the slot (122), and the locking mechanism further comprises a positioning assembly for enabling the latch (712) to be kept to be inserted into the slot (122) or separated from the slot (122).

5. The integrated battery box of the forklift truck according to claim 4, wherein a bolt seat (713) is arranged in the battery box (71), the bolt (712) is fixed on the battery box (71) through the bolt seat (713), the upper end of the bolt (712) is always exposed from the upper end face of the battery box (71), an opening for the bolt (712) to penetrate downwards is arranged at the lower end of the battery box, the slot (122) is positioned at the bottom of a mounting cavity on the forklift body, and the opening is aligned with the slot (122) after the battery box is completely installed in the mounting cavity (12).

6. The integrated battery box of the forklift truck according to claim 4, wherein the positioning assembly comprises a positioning column (715) connected with the bolt and a positioning groove arranged on the battery box (71), and before the positioning column (715) is clamped into the positioning groove, the positioning column (715) lifts the bolt (712) to keep a state of being separated from the slot due to the limitation of the upper end face of the battery box; the positioning column (715) rotates to the positioning groove, and the positioning column is clamped into the positioning groove downwards to drive the bolt (712) to be clamped into the slot.

7. The integrated battery compartment of claim 1, wherein the plug is provided with a handle.

8. The integrated battery box of claim 1, wherein the contactor is connected in series in a connection loop of the plug and the electric control mechanism.

9. The integrated battery box of a forklift of claim 1, wherein the battery box is formed with steps.

10. A forklift comprising an integrated battery box as claimed in any one of claims 1 to 9.