Steering structure of AGV forklift

Abstract

The utility model discloses a steering structure of an AGV (automatic guided vehicle) forklift, which is arranged on a rear axle of the AGV forklift, a swing arm for driving wheels to rotate is arranged on the wheels of the rear axle, and the steering structure comprises a steering motor with a driving gear; the speed reduction mechanism comprises a first speed reduction gear and a second speed reduction gear which are meshed with each other, and the first speed reduction gear is meshed with the driving gear; the steering rod is provided with a rack capable of being meshed with the second reduction gear, and the two ends of the steering rod are rotationally connected with the two swing arms respectively. According to the utility model, the original hydraulic steering is replaced by the driving motor, the speed reducing mechanism and the steering rod, and the driving motor, the speed reducing mechanism, the steering rod and the swing arm are all mechanically connected, so that compared with the flexible connection in the hydraulic steering, the mechanical connection has better steering precision and is more accurate in steering.

Description

Technical Field

[0001] The utility model relates to the technical field of forklifts, in particular to a steering structure of an AGV forklift. Background Art

[0002] AGV forklift is an automatic guided vehicle used for logistics turnover of stacked palletized goods. It consists of a hydraulic lifting system, a differential drive system, a PLC control system, a guidance system, a communication system, a warning system, an operating system and a power supply. It is a programmable wireless dispatchable automatic guided vehicle that integrates hydraulic lifting and PLC control.

[0003] Since the AGV forklift itself has a complete hydraulic system, the steering mechanism of the existing AGV forklift is driven by the hydraulic system of the AGV forklift itself, that is, hydraulic steering.

[0004] However, the hydraulic steering mechanism is driven by hydraulic pressure, and its essence is to transmit the driving force through the pressure of the oil, that is, flexible transmission or soft connection, and the steering is relatively vague. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to propose a steering structure of an AGV forklift, which is used to solve the problem of steering fuzziness of the hydraulic steering mechanism of the AGV forklift in the prior art.

[0006] The technical solution adopted by the utility model to solve the technical problem is a steering structure of an AGV forklift, which is arranged on the rear axle of the AGV forklift, and a swing arm for driving the wheel to rotate is provided on the wheel of the rear axle. The steering structure includes:

[0007] A steering motor having a driving gear;

[0008] A speed reduction mechanism comprising a first speed reduction gear and a second speed reduction gear meshing with each other, wherein the first speed reduction gear meshes with the driving gear;

[0009] A steering rod is provided with a rack that can mesh with the second reduction gear, and two ends of the steering rod are rotatably connected to the two swing arms respectively.

[0010] Furthermore, a connecting rod is provided between the steering rod and the swing arm, and two ends of the connecting rod are respectively hinged to the swing arm and the steering rod.

[0011] Furthermore, the swing arm is rotatably connected to the rear axle, and a hinge between the swing arm and the rear axle is defined as a first hinge, a hinge between the swing arm and the connecting rod is defined as a second hinge, and a hinge between the connecting rod and the steering rod is defined as a third hinge. The first hinge, the second hinge and the third hinge are respectively located at three vertices of the same triangle.

[0012] Furthermore, the connecting rod is gradually bent outward from the steering rod toward the swing arm.

[0013] Furthermore, the connecting rod comprises two connecting blocks, and ends of the two connecting blocks are respectively hinged to opposite sides of the swing arm or the steering rod.

[0014] Furthermore, a reinforcement column is provided between the two connection blocks, and two ends of the reinforcement column are respectively fixed to the middle parts of the two connection blocks.

[0015] Furthermore, the rotating shaft of the second reduction gear is located at the center of the rear axle.

[0016] Furthermore, the rotating shaft of the first reduction gear and the rotating shaft of the second reduction gear are located on the same side of the steering rod; the driving motor and the rotating shaft of the first reduction gear / the rotating shaft of the second reduction gear are located on opposite sides of the steering rod respectively.

[0017] Furthermore, the driving motor is located above the steering rod.

[0018] Compared with the prior art, the utility model has at least the following beneficial effects:

[0019] The original hydraulic steering is replaced by a drive motor, a reduction mechanism and a steering rod. The drive motor, the reduction mechanism, the steering rod and the swing arm are all mechanically connected. Compared with the soft connection in the hydraulic steering, the mechanical connection has better steering accuracy and more precise steering. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of the rear axle in the embodiment;

[0021] Figure 2 It is a structural schematic diagram of the steering structure in the embodiment;

[0022] Figure 3 is a schematic structural diagram of a connecting rod in an embodiment;

[0023] In the figure:

[0024] 100, rear axle; 110, wheel; 120, swing arm;

[0025] 200, driving motor; 210, first reduction gear; 220, second reduction gear;

[0026] 300, steering rod; 310, rack; 320, connecting rod; 321, connecting block; 322, reinforcing column. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0028] Please refer to Figure 1-Figure 3 The utility model discloses a steering structure of an AGV forklift, which is arranged on the rear axle 100 of the AGV forklift, and a swing arm 120 is arranged on the wheel 110 of the rear axle 100 to drive the wheel 110 to rotate. The steering structure includes:

[0029] A steering motor having a driving gear;

[0030] A speed reduction mechanism, comprising a first speed reduction gear 210 and a second speed reduction gear 220 meshing with each other, wherein the first speed reduction gear 210 meshes with the driving gear;

[0031] The steering rod 300 is provided with a rack 310 that can mesh with the second reduction gear 220 , and both ends of the steering rod 300 are rotatably connected to the two swing arms 120 .

[0032] Specifically, the present application drives the first reduction gear 210 through the drive motor 200, the first reduction gear 210 drives the second reduction gear 220 to rotate, the second reduction gear 220 drives the steering rod 300 to move left and right, and then drives the swing arm 120 and the wheel 110 to rotate, thereby achieving steering. In other words, the present application replaces the original hydraulic steering with the drive motor 200, the reduction mechanism and the steering rod 300, and the drive motor 200, the reduction mechanism, the steering rod 300 and the swing arm 120 are all mechanically connected. Compared with the soft connection in the hydraulic steering, the mechanical connection has better steering accuracy and more precise steering.

[0033] Furthermore, a connecting rod 320 is provided between the steering rod 300 and the swing arm 120 , and two ends of the connecting rod 320 are hinged to the swing arm 120 and the steering rod 300 , respectively.

[0034] The swing arm 120 is rotatably connected to the rear axle 100, and the hinge between the swing arm 120 and the rear axle 100 is defined as the first hinge, the hinge between the swing arm 120 and the connecting rod 320 is defined as the second hinge, and the hinge between the connecting rod 320 and the steering rod 300 is defined as the third hinge. The first hinge, the second hinge and the third hinge are respectively located at three vertices of the same triangle.

[0035] Specifically, a connecting rod 320 is arranged between the swing arm 120 and the steering rod 300. As the rotation angle of the wheel 110 increases, the lateral displacement of the connecting rod 320 decreases, that is, the ratio between the rotation angle of the wheel 110 and the displacement of the steering rod 300 (steering ratio) decreases as the rotation angle increases.

[0036] The purpose of this setting is that since forklifts are usually used in relatively narrow places, a larger steering ratio is required in the early stage of steering to facilitate flexible steering. At the same time, since the forklift has a large load, it is easy to roll over when turning sharply, so a smaller steering ratio is required in the later stage of steering to facilitate smooth steering.

[0037] Furthermore, the connecting rod 320 is gradually bent outward from the steering rod 300 toward the swing arm 120 .

[0038] Specifically, the connecting rod 320 is gradually bent outward from the steering rod 300 toward the swing arm 120. Compared with a straight rod or a design that bends in the opposite direction, the lateral projection of this connecting rod 320 is larger, so that the end of the steering rod 300 can be farther away from the swing arm 120, and the steering rod 300 has a larger lateral activity space, thereby increasing the maximum steering angle of the forklift.

[0039] Furthermore, the connecting rod 320 includes two connecting blocks 321 , and ends of the two connecting blocks 321 are respectively hinged to opposite sides of the swing arm 120 or the steering rod 300 .

[0040] A reinforcing column 322 is further disposed between the two connecting blocks 321 , and two ends of the reinforcing column 322 are respectively fixed to the middle portions of the two connecting blocks 321 .

[0041] Specifically, the connecting rod 320 is divided into two connecting blocks 321, and the two connecting blocks 321 are respectively hinged to the two sides of the steering rod 300 or the swing arm 120, so that the two sides of the swing arm 120 and the steering rod 300 are subjected to more uniform force. At the same time, a reinforcing column 322 is fixed between the connecting blocks 321, which is conducive to improving the strength of the connecting rod 320 and making the two connecting blocks 321 move synchronously to avoid uneven force on both sides of the steering rod 300 and the swing arm 120.

[0042] Furthermore, the rotating shaft of the second reduction gear 220 is located at the center of the rear axle 100 .

[0043] Furthermore, the rotating shaft of the first reduction gear 210 and the rotating shaft of the second reduction gear 220 are located on the same side of the steering rod 300; the driving motor 200 and the rotating shaft of the first reduction gear 210 / the rotating shaft of the second reduction gear 220 are located on opposite sides of the steering rod 300 respectively.

[0044] Furthermore, the driving motor 200 is located above the steering rod 300 .

[0045] Specifically, the first reduction gear 210 and the second reduction gear 220 are arranged on the same side of the steering rod 300, and the drive motor 200 is located on the other side of the steering rod 300, so as to avoid the three being located on the same side and causing the side to occupy too much space, so as to reduce the space of the entire steering mechanism in the length direction of the forklift and make the structure more compact.

[0046] At the same time, the drive motor 200 is arranged above the steering rod 300 to avoid the drive motor 200 from scratching the ground during driving when the drive motor 200 is arranged below the steering rod 300, so as to improve the ground clearance of the entire forklift.

[0047] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0048] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A steering structure of an AGV forklift, which is arranged on the rear axle of the AGV forklift, and a swing arm is arranged on the wheel of the rear axle to drive the wheel to rotate, characterized in that: The steering structure comprises: A steering motor having a driving gear; A speed reduction mechanism comprising a first speed reduction gear and a second speed reduction gear meshing with each other, wherein the first speed reduction gear meshes with the driving gear; A steering rod is provided with a rack that can mesh with the second reduction gear, and two ends of the steering rod are rotatably connected to the two swing arms respectively.

2. The steering structure of an AGV forklift according to claim 1, characterized in that: A connecting rod is also provided between the steering rod and the swing arm, and two ends of the connecting rod are respectively hinged to the swing arm and the steering rod.

3. The steering structure of an AGV forklift according to claim 2, characterized in that: The swing arm is rotatably connected to the rear axle, and a hinge between the swing arm and the rear axle is defined as a first hinge, a hinge between the swing arm and the connecting rod is defined as a second hinge, and a hinge between the connecting rod and the steering rod is defined as a third hinge. The first hinge, the second hinge and the third hinge are respectively located at three vertices of the same triangle.

4. The steering structure of an AGV forklift according to claim 2, characterized in that: The connecting rod is gradually bent outward from the steering rod toward the swing arm.

5. The steering structure of an AGV forklift according to claim 2, characterized in that: The connecting rod comprises two connecting blocks, and the ends of the two connecting blocks are respectively hinged to the opposite sides of the swing arm or the steering rod.

6. The steering structure of an AGV forklift according to claim 5, characterized in that: A reinforcing column is also provided between the two connecting blocks, and two ends of the reinforcing column are respectively fixed to the middle parts of the two connecting blocks.

7. The steering structure of an AGV forklift according to claim 1, characterized in that: The rotating shaft of the second reduction gear is located at the center of the rear axle.

8. The steering structure of an AGV forklift according to claim 1, characterized in that: The rotating shaft of the first reduction gear and the rotating shaft of the second reduction gear are located on the same side of the steering rod; the steering motor and the rotating shaft of the first reduction gear / the rotating shaft of the second reduction gear are located on opposite sides of the steering rod respectively.

9. The steering structure of an AGV forklift according to claim 1, characterized in that: The steering motor is located above the steering rod.

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