A high efficiency industrial vehicle with a small turning radius

Abstract

The present application relates to the field of automatic mechanical equipment, in particular to an industrial vehicle, and the present application is realized through the following technical scheme: an efficient industrial vehicle with small turning radius, comprising a driving wheel, a handle for driving the driving wheel to turn, a main frame and a vehicle leg connected with the main frame, the main frame comprising a side plate, a bottom plate and a top plate, the bottom plate, the side plate and the top plate forming a semi-enclosed vehicle box accommodating area, and an oil cylinder being arranged in the vehicle box accommodating area; in the length direction of the vehicle, a battery box is located between the handle and the main frame; the purpose of the present application is to provide an efficient industrial vehicle with small turning radius, through optimization of vehicle components and space, the vehicle body length is reduced, the turning radius is small, and the maintenance operation of the battery is convenient and efficient, and the practicability of the vehicle is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automatic mechanical equipment, in particular to an industrial vehicle. BACKGROUND

[0002] Industrial vehicle refers to a power-driven motor vehicle used to carry, push, tow, lift, stack or store various cargos. Common industrial vehicles include forklifts, side forklifts, tow trucks, carrying trucks, stackers and the like.

[0003] Industrial vehicles often include a vehicle body, a handle, a fork, a battery box, an oil cylinder, a pump station, a controller and the like in structure. Industrial vehicles have two actions in work, namely turning and lifting. In the lifting action, the oil cylinder is connected with the vehicle body, and the vehicle body is connected with the fork. When the piston rod in the oil cylinder is pushed out, the vehicle body and the fork are lifted. In the turning action, the handle is connected with the driving wheel. When the worker turns the handle, the driving wheel is synchronously turned.

[0004] A small electric carrying vehicle disclosed in Chinese patent document CN201220551277.X includes a main frame, and a fork and a handle connected with the main frame respectively. The truck box part of the main frame forms a containing space, in which components such as a pump station, an oil cylinder, a controller and the like are installed. The industrial vehicle has stable and reliable structure, and is widely used in warehouse logistics.

[0005] However, the structure has two defects. On the one hand, with the development and maturity of logistics, the scale of cargos in the warehouse is getting larger and larger. In order to improve the space efficiency of the warehouse, the distance between adjacent racks is gradually reduced, i.e. the width of the aisle is gradually reduced. Although the industrial vehicle of the structure can often adapt to the narrow aisle in width, it still has a relatively long length in the length of the vehicle body. The length dimension makes the turning radius of the vehicle large, which is easy to collide with the racks when turning in the aisle. On the other hand, unlike fuel vehicles, the power of industrial vehicles often comes from battery packs. With the increase of the carrying weight of the industrial vehicle and the complexity of the driving environment, the battery endurance time of the vehicle naturally decreases. Carrying large-volume batteries further increases the length of the vehicle body, and the battery is loaded in the truck box. It is very inconvenient to charge, replace and maintain the battery. SUMMARY

[0006] The purpose of the present application is to provide an efficient industrial vehicle with a small turning radius. Through optimization of the vehicle components and space, the length of the vehicle body is reduced, the turning radius is small, the maintenance operation of the battery is convenient and efficient, and the practicability of the vehicle is improved.

[0007] The utility model provides a high -efficient industrial vehicle of small turning radius, including drive wheel, handle that drives the drive wheel turns, main frame and car leg with main frame connection, main frame includes side plate, bottom plate and top plate, and bottom plate, side plate and top plate form a half -enclosed car box containing area, and oil cylinder is arranged in car box containing area;

[0008] The handle is connected with the drive wheel at a connection point a, and during rotation of the handle, a rotation track curve of the connection point a forms a rotation area B together with the main frame on the projection on the ground;

[0009] In the length direction of the vehicle, the battery box is located between the handle and the main frame;

[0010] The projection of the battery box on the ground, the front and side of the battery box, all do not exceed or touch the boundary line of the rotation area B.

[0011] The main frame is located in the middle of the whole vehicle, and in the length direction of the vehicle, the direction close to the car leg is defined as rear, and the direction close to the handle is defined as front.The main frame is a box structure, forming a car box containing area. First, the installation position of the battery box is redesigned, which is not arranged in the car box containing area, nor arranged at the rear of the main frame, i.e. not arranged outside the car box containing area and placed on the car leg. But it is placed in front of the main frame, between the main frame and the handle.

[0012] Between the main frame and the handle, due to the existence of the drive wheel assembly, a certain space in the length direction of the vehicle is necessarily reserved for the arrangement of the drive wheel. In this case, the battery box is arranged in this area. It can be the side end or the upper end of the drive wheel assembly, depending on the specific shape and style of the vehicle. Regardless of the position, the battery box will not occupy additional space in the length direction of the vehicle. Such space design, on the one hand, makes the total length of the vehicle body controlled, and the vehicle has a smaller turning radius. On the other hand, even if the vehicle needs larger battery capacity and needs larger battery box volume, only the height of the battery needs to be increased, the length of the vehicle body can still be effectively controlled.

[0013] Secondly, the shape and size of the battery box are limited. Specifically, in actual work, the user operates the handle to steer the vehicle, and the limit rotation angle of the handle is 90° left and 90° right, respectively. The trajectory of the connecting point a is a circular arc with a horizontal direction of 180°. As described above, the arrangement of the battery box, the projection of the battery box on the ground, and the 180° circular arc of a in the front and side directions are not allowed to touch or exceed the above-mentioned a. In actual work, the handle and the drive wheel assembly are hinged at the connecting point a, and the handle can be inverted in the vertical direction. The limit angle of inversion is often set to be perpendicular to the horizontal plane and parallel to the horizontal plane. That is, the shape design of the battery box does not collide with the handle at any position of the battery box when the handle is steered left and right.

[0014] Thirdly, since the piston rod of the oil cylinder needs to push the top plate of the main frame to realize the lifting of the main frame, the oil cylinder needs to be placed in the vehicle box containing area. In this case, since the battery box is not placed in the vehicle box containing area, the charging, maintenance, replacement and other operations of the battery become very convenient, and the operation process does not involve collision or interference with the oil cylinder, and various tools have more operation space.

[0015] As a preferred embodiment of the present application, the pump station is arranged in the vehicle box containing area.

[0016] As a preferred embodiment of the present application, the pump station is located on the side of the oil cylinder away from the handle.

[0017] As a preferred embodiment of the present application, a sub-frame is further included, the sub-frame includes a fixed block above the drive wheel assembly, and the battery box is installed above the fixed block.

[0018] As a preferred embodiment of the present application, the controller is installed on the fixed block or on the battery box.

[0019] As a preferred embodiment of the present application, the sub-frame further includes a lower connecting disc connected with the fixed block, the lower connecting disc is located on both sides of the drive wheel assembly, and the lower connecting disc is connected with the vehicle leg through a hinged piece.

[0020] As a preferred embodiment of the present application, a through groove is provided on the lower connecting disc for a wire harness to pass through, and the wire harness is connected with the controller and the drive wheel, respectively.

[0021] As a preferred embodiment of the present application, the pump station is connected with the sub-frame, the cylinder barrel of the oil cylinder is connected with the sub-frame, and the piston rod of the oil cylinder is in contact with the bottom surface of the top plate.

[0022] As a preferred embodiment of the present application, the industrial vehicle has a middle axis L2 in the length direction of the vehicle, and the battery box is arranged centrally with respect to the middle axis L2.

[0023] As a preferred embodiment of the present application, the projection of the battery box on the ground overlaps with the projection of the main frame on the ground in the direction of the back of the battery box.

[0024] In summary, the present application has the following advantages:

[0025] 1. The overall length of the vehicle body is controlled, and the vehicle has a smaller turning radius. Even if the vehicle needs a larger battery capacity and a larger battery box volume, only the height of the battery needs to be increased, and the length of the vehicle body can still be effectively controlled.

[0026] 2. The battery box is not placed in the truck box accommodation area, but is placed above the sub-frame, so that the charging, maintenance, replacement and other operations of the battery become very convenient, and the operation process does not involve collision or interference with the oil cylinder, and various tools have more operating space.

[0027] 3. There are no electrical devices and electrical wires on the main frame. The main frame can be placed horizontally or inverted during transportation, improving the number of truck container shipments and reducing transportation costs.

[0028] 4. During the turning process of the vehicle, the battery box and the handle do not collide or interfere with each other.

[0029] 5. Whether it is the turning or lifting action of the vehicle, the battery box, the controller, the oil cylinder and the pump station remain relatively stationary with the sub-frame, avoiding the frequent displacement of the vehicle components and their electrical wires during operation, and avoiding collision and wear during displacement.

[0030] 6. The truck box adopts a trapezoidal folding design, which is narrow at the top and wide at the bottom. On the one hand, it is more conducive to the design trend of light and small industrial vehicles, and on the other hand, it is beneficial to the widening of the worker's line of sight during operation without obstruction, improving the safety of the operation.

[0031] 7. The pump station and the oil cylinder are arranged in the truck box accommodation area, which optimizes the force arm during lifting, improves the structural stability of the main frame, and further optimizes the turning radius of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a schematic view of embodiment 1;

[0033] Figure 2 is Figure 1 an enlarged schematic view of the sub-frame in

[0034] Figure 3 is Figure 1 a side view of

[0035] Figure 4 isFigure 3 schematic view of the main frame and legs hidden;

[0036] Figure 5 is Figure 1 schematic view from above in the case of handle steering;

[0037] Figure 6 is a schematic view of embodiment 2;

[0038] Figure 7 is a schematic view of embodiment 3.

[0039] in the figure:

[0040] 11, main frame, 111, side plate, 112, top plate, 113, truck accommodating area, 12, leg, 21, handle, 22, drive wheel assembly, 3, sub-frame, 31, fixing block, 32, lower connecting disc, 4, controller, 5, battery box, 6, oil cylinder, 7, pump station, 8, hinged piece. a, connection point one, L1, central axis one, B, rotation area, L2, central axis two. DETAILED DESCRIPTION

[0041] The present application will be further described in detail below in conjunction with the accompanying drawings.

[0042] The specific embodiments are only an explanation of the present application, and are not a limitation of the present application, and those skilled in the art can make modifications to the embodiments without creative contribution after reading the present specification, but as long as the modifications are within the scope of the claims of the present application, they are protected by the patent law.

[0043] Embodiment 1, an industrial vehicle, can be a forklift, a stacker, a sorting vehicle, etc. of different types of vehicles, and the present technical solution takes the forklift as an example.

[0044] As Figure 1 and Figure 3 shown, the main frame 11 and the leg 12 often adopt a steel structure, as the main load-bearing and force-receiving components of the entire industrial vehicle. The leg 12 is connected to the main frame 11 and can be considered as a whole in the motion track.

[0045] The main frame 11 includes back plate, side plate 111, bottom plate, top plate 112, etc. structural panels, and each panel forms a semi-enclosed area, i.e. truck accommodating area 113, as shown in Figure 1 、 Figure 2 、 Figure 3 In the present case, the truck accommodating area 113 is provided with an oil cylinder 6 and a pump station 7.

[0046] In the present application, the side of the vehicle close to the handle 21 in the length direction, i.e. the left side in Figure 1 is the front, and the side close to the leg 12 in the length direction, i.e.Figure 1 Right side in the figure is rear.

[0047] The pump station 7 is arranged more rearward than the oil cylinder 6.

[0048] In the case, the sub-frame 3 is provided, which has no special function and mainly serves as a load-bearing component. It includes a fixing block 31 and a lower connecting disc 32. The handle 21 is connected with the drive wheel assembly 22, which is connected with the sub-frame 3 through components such as a rotating shaft, a bearing, etc. The pump station 7, the battery box 5, and the controller 4 are all connected with the sub-frame 3. The oil cylinder 6 is connected with the sub-frame 3 through the cylinder barrel, and the piston rod is in contact with the lower surface of the top plate 112, thereby driving the lifting of the main frame 11 and the legs 12.

[0049] The source of the vehicle operation comes from the power pack, i.e. Figure 2 the battery box 5 in the figure. In the case, the battery box is not placed in the vehicle box accommodating area 113, but is placed between the main frame 11 and the handle 21. Further, the fixing block 31 is vertically located directly above the drive wheel assembly 22, and the battery box 5 is installed above the fixing block 31.

[0050] Between the main frame 11 and the handle 21, due to the presence of the drive wheel assembly 22, a certain space in the length direction of the vehicle is necessarily reserved for the arrangement of the drive wheel. In the case, the battery box 5 is arranged in this area. Thus, the battery box 5 does not occupy additional space in the length direction of the vehicle. Such a space design, on the one hand, controls the total length of the vehicle body, and the vehicle has a smaller turning radius. On the other hand, even if the vehicle needs a larger battery capacity and needs a larger battery box 5 volume, only the height of the battery needs to be increased, and the length of the vehicle body can still be effectively controlled.

[0051] Secondly, in the case, since the battery box 5 is not placed in the vehicle box accommodating area 113, the charging, maintenance, and replacement of the battery become very convenient, and the operation process does not involve collision or interference with the oil cylinder 6, and various tools have a larger operation space.

[0052] Such a design can also realize that there is no electrical device on the main frame 11 and no electrical wire routing. The main frame 11 can be a pure steel structure, which has low manufacturing and workshop transportation costs. The main frame 11 can be placed horizontally or inverted during transportation, which improves the number of container transportations and reduces transportation costs.

[0053] The shape and size of the battery box are limited. Specifically, as shown in Figure 3 , Figure 4 and Figure 5The handle 22 and the drive wheel assembly 22 are hinged at the connection point a, and the user drives the drive wheel 22 left and right by the handle 22, and at the same time, the handle 22 can also rotate in the vertical direction relative to the drive wheel 22.

[0054] As shown in Figure 3 and Figure 5 , the drive wheel assembly 22 must include a rotating shaft, and as in the prior art, the drive wheel assembly 22 and the handle 21 rotate in the horizontal direction with the axis of the rotating shaft, that is, the central axis L1. When the handle 21 rotates, a left turn of 90 degrees and a right turn of 90 degrees are the limit angles of the handle turning. The angle rotation limit design of the handle 21 is the content of the prior art, and this scheme does not change, and will not be described here. During the turning of the handle 21, the trajectory of the connection point a is a semicircular arc with the projection of L1 on the ground as the center, which is 180 degrees.

[0055] The semicircular arc is at the front end, and the rear end is the projection of the main frame 11 on the ground, which together forms a semicircular rotating area B. The projection of the battery box 5 on the ground must be designed in shape and size to ensure that it is in the rotating area B. Specifically, the front and side of the projection cannot touch or cross the boundary line of B, and the boundary line of B is actually the semicircular trajectory of the rotation of a.

[0056] As described above, in actual work, the handle 21 can be flipped in the vertical direction. The limit angle of the flip is often set to be perpendicular to the horizontal plane and parallel to the horizontal plane. That is, the shape design of the battery box 5 will not collide with the handle at any position during the left and right turning of the handle.

[0057] The case also designs the independence of the movement of each component of the vehicle.

[0058] Specifically, as shown in Figure 1 , this kind of vehicle can be regarded as three total compositions. Composition A: Figure 1 The left handle 21 and the drive wheel 22 are connected, and the worker rotates the handle 21 in the horizontal direction to drive the drive wheel 22 to turn. Composition B: The main frame 11 and the legs 12 connected thereto on the right side of the figure are lifted and lowered under the action of the lifting structure, driving the lifting of the goods. Composition C: The middle part in the figure, including the sub-frame 3, the sub-frame 3 is connected and installed with four large pieces, as shown in Figure 2 , which are the battery box 5, the lifting structure oil cylinder 6, the pump station 7 and the controller 4.

[0059] In such industrial design, when the vehicle turns, the composition C and the composition A rotate relatively, but each component in the composition C remains relatively static, especially the controller 4 and the battery box 5 do not rotate relatively. When the vehicle lifts, the composition C and the composition B lift relatively, but each component in the composition C remains relatively static, only the piston rod of the oil cylinder 6 moves. In such design, whether the vehicle turns or lifts, the battery box 5, the controller 4, the oil cylinder 6 and the pump station 7 remain relatively static with the sub-frame 3, avoiding the frequent displacement of each component and the electric wire of the component during the operation of the vehicle, avoiding the collision and wear during the displacement.

[0060] The controller 4 is arranged on the front side of the fixed block 31, i.e. close to the handle 21. On the one hand, it avoids the problem of increasing the volume of the outer shell arranged on the side of the fixed block 31. On the other hand, this area is close to the top of the driving wheel 23. The lower connecting disc 32 is below the fixed block 31 and is provided with a through groove, so that the wire harness can be directly connected to the driving wheel 23 and the controller 4, the connection distance is short, and the wiring is convenient.

[0061] In the present case, the vehicle box adopts a trapezoidal folding design, which is narrow at the top and wide at the bottom. On the one hand, it is more conducive to the design trend of lightening and miniaturizing the industrial vehicle. On the other hand, it is conducive to widening the field of vision of the worker during operation without obstruction, thereby improving the safety of operation.

[0062] The hinged piece 8 is rotatably connected to the main frame 11 at one end and rotatably connected to the lower connecting disc 32 at the other end, thereby improving the stability of the main frame 11 during lifting.

[0063] Embodiment 2, as shown in FIG. 6, differs from embodiment 1 in the shape of the battery box 5. In the present embodiment, part of the battery box 5 exceeds the boundary of the rotation area B, but not in the front or side direction, but in the rear direction. That is, the rear end of the battery box 5 enters the vehicle compartment accommodating area 113 in the main frame 11. The rear end of the battery box 5 can also be designed as a circular arc special shape for avoiding the oil cylinder 6. Such implementation is also within the scope of protection of the present application, and can solve the same technical problem and achieve the same technical effect.

[0064] The center line of the vehicle in the length direction is the second central axis L2 in the figure, and the battery box 5 is arranged centrally relative to L2.

[0065] Embodiment 3, as shown in FIG. 7, differs from embodiment 1 in the left and right arrangement positions of the battery box 5. In the present embodiment, the battery box 5 is not arranged centrally relative to the second central axis L2. However, the front end and the side end of the battery box 5 project on the ground and do not touch or exceed the boundary line of B. Figure 7 ​

Claims

1. A high efficiency industrial vehicle with small turning radius, comprising a driving wheel (22), a handle (21) for steering the driving wheel (22), a main frame (11) and a vehicle leg (12) connected to the main frame (11), characterized in that: The main frame (11) comprises side plates (111), a bottom plate and a top plate (112), the bottom plate, the side plates (111) and the top plate (112) form a semi-enclosed carriage accommodating area (113), and the oil cylinder (6) is arranged in the carriage accommodating area (113); The handle (21) is connected with the driving wheel (22) at a connection point one (a), and during rotation of the handle (21), a rotation track curve of the connection point one (a) and a projection of the main frame (11) on the ground together form a rotation area (B). In the length direction of the industrial vehicle, the battery box (5) is located between the handle (21) and the main frame (11). The projection of the battery box (5) on the ground, the front face and the side face of the battery box (5) do not exceed or touch the boundary line of the rotation area (B). Further comprising a sub-frame (3), the sub-frame (3) comprises a fixed block (31) located above the driving wheel (22), the battery box (5) is installed directly above the fixed block (31), and the controller (4) is arranged on the surface of the fixed block (31) close to the handle (21); the pump station (7), the oil cylinder (6), the controller (4) and the battery box (5) are connected together on the fixed block (31), and the fixed block (31) is arranged directly above the driving wheel (22); in the length direction of the industrial vehicle, the battery box (5) is closest to the handle (21), the pump station (7) is farthest from the handle (21), and the oil cylinder (6) is located between the pump station (7) and the battery box (5).

2. The high efficiency industrial vehicle with small turning radius of claim 1, wherein: The pump station (7) is arranged in the carriage accommodating area (113).

3. The high efficiency industrial vehicle with a small turning radius of claim 2, wherein: The pump station (7) is located on the side of the oil cylinder (6) away from the handle (21).

4. The high efficiency industrial vehicle with a small turning radius of claim 1, wherein: The sub-frame (3) further comprises a lower connecting disc (32) connected with the fixed block (31), the lower connecting disc (32) is located on both sides of the driving wheel (22), and the lower connecting disc (32) is connected with the vehicle leg (12) through a hinged piece (8).

5. The high efficiency industrial vehicle with a small turning radius of claim 4, wherein: A passing groove is formed in the lower connecting disc (32) for a wire harness to pass through, and the wire harness is connected with the controller (4) and the driving wheel (22) respectively.

6. The high efficiency industrial vehicle with a small turning radius of claim 1, wherein: The pump station (7) is connected with the sub-frame (3), the cylinder barrel of the oil cylinder (6) is connected with the sub-frame (3), and the piston rod of the oil cylinder (6) is in contact with the bottom surface of the top plate (112).

7. A high efficiency industrial vehicle with a small turning radius as claimed in any one of claims 1 to 6, characterized in that: The industrial vehicle has a middle axis two (L2) in the length direction of the vehicle, and the battery box (5) is arranged centrally relative to the middle axis two (L2).

8. A high efficiency industrial vehicle with a small turning radius as claimed in any one of claims 1 to 6, characterized in that: The projection of the battery box (5) on the ground overlaps with the projection of the main frame (11) on the ground in the direction of the back face of the battery box (5).

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