Ring rail type RGV forklift

Abstract

The utility model relates to a circular track type RGV forklift which comprises a forklift body, outer side walking wheels and inner side walking wheels of the forklift body correspondingly move on two circular tracks, and further comprises a walking wheel self-adaptive adjusting assembly which is installed between the bottom of the forklift body and a walking wheel box of the outer side walking wheels. At least part of the components can move towards the outer side of the annular track along with the outer side walking wheel, and the distance between the walking wheel box of the outer side walking wheel and the walking wheel box of the inner side walking wheel is changed; and the walking wheel box of the outer side walking wheel is rotationally connected with the walking wheel self-adaptive adjusting assembly. According to the RGV forklift, the position of the outer side walking wheel box can be automatically adjusted according to the curvature of the annular track, and therefore the requirement for turning of different radiuses can be met. And the adaptability and the operation flexibility of the forklift in the turning process are improved. The walking wheel box of the outer side walking wheel is rotationally connected with the walking wheel self-adaptive adjusting assembly, the angle of the walking wheel box of the outer side walking wheel in the turning process is changed, and the turning capacity is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automatic conveying, more particularly to a ring rail type RGV forklift. BACKGROUND

[0002] With the rapid development of modern logistics systems, automated and intelligent devices play an increasingly key role in warehousing and material handling processes. Among them, RGV trolleys (rail guided vehicles) as an innovative device that can run efficiently in the lane without the intervention of forklifts have been widely used in various logistics scenes. Through seamless connection with other logistics systems (such as loading / unloading stations, conveyors, elevators and robots, etc.), RGV trolleys realize the automatic and planned transportation of materials, greatly improving logistics efficiency and automation level.

[0003] However, although the RGV trolley technology brings significant logistics benefits, there are still some defects in the design of existing ring rail RGV trolleys that cannot be ignored. Specifically, the bottom running wheels of most current ring rail RGV trolleys roll on a ring-shaped track composed of two H-shaped rails. This design encounters several challenges in actual operation, especially in the turning section. Since the outer running wheels need to travel a longer distance compared to the inner running wheels, when both turn at the same speed, a distance difference will inevitably occur. In the existing design, the distance between the wheel boxes of the inner and outer running wheels cannot be adjusted accordingly according to the track curvature, which causes the outer running wheels to easily cause transportation jam when turning due to holding the track tightly, and in severe cases, it may even cause equipment damage. In addition, the wheel box direction of the outer running wheels is fixed and cannot adapt to the curvature changes of the track, further exacerbating the turning difficulty problem, affecting the normal operation and work efficiency of the equipment.

[0004] In view of the above problems, the skilled person in the art urgently needs to develop a new type of RGV forklift that can adapt to ring rail turning to overcome the limitations of existing technology and improve the automation and intelligence level of logistics systems. CONTENT OF THE UTILITY MODEL

[0005] Therefore, the purpose of the utility model is to propose a new type of RGV forklift that can adapt to ring rail turning to overcome the limitations of existing technology.

[0006] The technical solution of the utility model is a ring rail type RGV forklift, which includes a forklift body, outer running wheels and inner running wheels corresponding to move on two ring-shaped tracks, and further includes;

[0007] The walking wheel adaptive adjustment assembly is installed between the bottom of the forklift body and the walking wheel box of the outer walking wheel, at least part of components of the walking wheel adaptive adjustment assembly can move towards the outside of the loop track to change the distance between the walking wheel box of the outer walking wheel and the walking wheel box of the inner walking wheel when turning, and the walking wheel box of the outer walking wheel is rotationally connected with the walking wheel adaptive adjustment assembly.

[0008] According to the technical scheme of the utility model, the walking wheel adaptive adjustment assembly comprises at least one set of sliding pairs, and any sliding part in the sliding pairs moves towards the outside of the loop track when turning.

[0009] According to the technical scheme of the utility model, the sliding pairs adopt sliding rails and sliding blocks, the sliding rails are installed on the bottom of the forklift body or the top of the walking wheel box of the outer walking wheel, and the sliding blocks are correspondingly installed on the top of the walking wheel box of the outer walking wheel or the bottom of the forklift body.

[0010] According to the technical scheme of the utility model, a wheel box rotation assembly is connected between the walking wheel box of the outer walking wheel and the walking wheel adaptive adjustment assembly, so that the angle of the walking wheel box of the outer walking wheel is changed when turning.

[0011] According to the technical scheme of the utility model, the wheel box rotation assembly comprises:

[0012] A bearing seat is installed on the bottom of the walking wheel assembly plate, and the walking wheel assembly plate supports the lower sliding part of the sliding pair;

[0013] A rotating shaft is rotationally arranged in the bearing seat;

[0014] A wheel box connecting plate is connected to the rotating shaft in the middle and connected to the top of the walking wheel box of the outer walking wheel in the bottom.

[0015] According to the technical scheme of the utility model, the inner walking wheel is a driving wheel, the outer walking wheel is a driven wheel, the bottom of the walking wheel box of the outer walking wheel and the bottom of the walking wheel box of the inner walking wheel correspondingly have guiding assemblies, and the walking wheel box of the inner walking wheel has an anti-overturning assembly.

[0016] According to the technical scheme of the utility model, the anti-overturning assembly comprises:

[0017] An anti-overturning wheel mounting plate is detachably arranged on the outer side wall of the walking wheel box;

[0018] A transmission shaft is connected to the inner side of the lower part of the anti-overturning wheel mounting plate;

[0019] The anti-overturning wheel is rotatably connected to the other end of the transmission shaft and is located below the walking wheel box, and the width of the anti-overturning wheel is consistent with the width of the lower end surface of the top plate of the loop track and abuts against the lower end surface of the top plate of the loop track.

[0020] According to the technical scheme of the utility model, the spacing between the anti-overturning wheel and the lower end surface of the top plate of the loop track is adjusted through the anti-overturning wheel position adjusting assembly.

[0021] According to the technical scheme of the utility model, the anti-overturning wheel position adjusting assembly comprises:

[0022] The adjusting shaft is rotatably connected to the shaft hole of the anti-overturning wheel mounting plate and extends to the side away from the transmission shaft, and the axis of the adjusting shaft is arranged eccentrically to the central axis of the transmission shaft; the adjusting shaft is rotated to drive the anti-overturning wheel to adjust the lifting; at least two limiting holes are arranged on the anti-overturning wheel mounting plate.

[0023] The limiting disc is provided with a plurality of adjusting holes, and the middle part is connected with the adjusting shaft through a limiting piece; the limiting hole and the corresponding adjusting hole are connected through the limiting piece, so that the spacing between the anti-overturning wheel and the lower end surface of the top plate of the loop track is maintained.

[0024] According to the technical scheme of the utility model, the power supply assembly comprises a slide wire and a current collecting arm, the slide wire is arranged along the inner side I-shaped steel rail of the loop track, is located on the bottom plate of the inner side I-shaped steel rail or is arranged in parallel with the inner side I-shaped steel rail; the current collecting arm is fixed on the walking wheel box and abuts against the slide wire to collect electricity.

[0025] The PLC control box is electrically connected with the slide wire and the driving motor of the walking wheel box of the inner side walking wheel.

[0026] According to the above technical scheme, compared with the prior art, the technical effects of the utility model are as follows:

[0027] 1. The utility model discloses a walking wheel self-adaptive adjusting assembly, which can automatically adjust the position of the outer side walking wheel box according to the curvature of the loop track, thereby adapting to the turning requirements of different radii. This design improves the adaptability and operation flexibility of the forklift during turning. The walking wheel box of the outer side walking wheel is rotatably connected with the walking wheel self-adaptive adjusting assembly, so that the angle of the walking wheel box of the outer side walking wheel during turning is changed, and the turning ability is further improved.

[0028] 2.The design of the anti-overturning assembly ensures the stability of the forklift during turning, especially when the outer walking wheels follow the movement of the track, and the anti-overturning wheels can effectively prevent the forklift from overturning, especially under high speed, heavy load, and cargo taking conditions.

[0029] 3.The power supply assembly provides stable power supply and precise motor control for the RGV forklift, which helps to achieve more precise speed and direction control and improve the accuracy of the handling operation.

[0030] 4.The detachable anti-overturning wheel mounting plate and other designs make the maintenance of the forklift more convenient. For example, when the anti-overturning wheels are worn or damaged, they can be quickly replaced.

[0031] 5.The configuration of the inner walking wheels as driving wheels and the outer walking wheels as driven wheels, as well as the presence of the guide assembly and the anti-overturning assembly, increases the safety of the RGV forklift operation. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0033] Figure 1 A structural schematic diagram of a loop rail type RGV forklift from one perspective is provided for the present application.

[0034] Figure 2 A structural schematic diagram of a loop rail type RGV forklift from another perspective is provided for the present application.

[0035] Figure 3 A Figure 2 enlarged schematic diagram of part A is provided.

[0036] Figure 4 An exploded view of the walking wheel self-adaptive adjustment assembly and the wheel box rotation assembly is shown.

[0037] Figure 5 A front view of a loop rail type RGV forklift is provided for the present application.

[0038] Figure 6 A Figure 5 enlarged schematic diagram of part B is provided.

[0039] Figure 7 A Figure 5 bottom view is provided.

[0040] Figure 8 A front view of the anti-overturning wheel position adjusting assembly is shown.

[0041] Figure 9 A side view of the anti-overturning assembly and the anti-overturning wheel position adjusting assembly is shown. Figure 8 A side view of the anti-overturning assembly and the anti-overturning wheel position adjusting assembly is shown.

[0042] Figure 10 A front view of the anti-overturning wheel position adjusting assembly is shown.

[0043] 1-fork truck body, 2-walking wheel self-adapting adjusting assembly, 21-slideway, 22-slideway block, 23-walking wheel assembly plate, 231-bearing mounting hole, 3-wheel box rotating assembly, 31-bearing seat, 32-rotating shaft, 33-wheel box connecting plate, 34-connecting column, 4-walking wheel box, 41-driving motor, 42-anti-overturning assembly, 421-anti-overturning wheel mounting plate, 422-transmission shaft, 423-anti-overturning wheel, 43-anti-overturning wheel position adjusting assembly, 431-adjusting rotating shaft, 432-limiting disc, 4321-adjusting hole, 433-limiting nail, 434-fastening nut, 44-guiding assembly, 441-guiding wheel mounting plate, 442-guiding wheel, 5-current collecting arm, 6-PLC control box, 100-ring rail. DETAILED DESCRIPTION

[0044] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0045] Since the bottom walking wheels of the existing ring rail RGV trolley roll on the ring rail composed of two H-shaped rails, the distance between the tracks at the turning point does not change, and the distance between the walking wheel boxes corresponding to the inner and outer walking wheels is also fixed. When turning, the outer walking wheels need to travel a longer distance compared to the inner walking wheels, and when both turn at the same speed, a distance difference will be generated. This causes the outer walking wheels to easily cause the conveying to be blocked when turning due to the tightness of the track, and in severe cases, it may even cause damage to the equipment. The direction of the wheel box of the existing outer walking wheel is also fixed and cannot adapt to the bending change of the track, further exacerbating the turning difficulty problem and affecting the normal operation and work efficiency of the equipment.

[0046] In view of this, the present application provides a ring rail type RGV forklift, as shown in the accompanying Figures 1-7, including a forklift body 1, corresponding moving of outer walking wheels and inner walking wheels on two ring tracks 100 (the inner walking wheels and the outer walking wheels are defined according to the angle of the drawing), further comprising; a walking wheel self-adapting adjusting assembly 2 installed between the bottom of the forklift body 1 and the walking wheel box 4 of the outer walking wheel, when turning, at least part of components can move towards the outside of the ring track 100 along with the outer walking wheel, change the distance between the walking wheel box 4 of the outer walking wheel and the walking wheel box 4 of the inner walking wheel; and the walking wheel box 4 of the outer walking wheel and the walking wheel self-adapting adjusting assembly 2 are rotationally connected.

[0047] The above technical scheme, when the forklift body 1 turns, by changing the distance between the walking wheel box 4 of the outer walking wheel and the walking wheel box 4 of the inner walking wheel, the turning ability of the walking wheel is improved without changing the track, and the turning is smooth and not jammed, the walking wheel box 4 of the outer walking wheel and the walking wheel self-adapting adjusting assembly 2 are rotationally connected, the angle of the walking wheel box of the outer walking wheel is changed when turning, and the turning ability is further improved.

[0048] In an embodiment of the utility model, the walking wheel self-adapting adjusting assembly 2 at least includes a set of sliding pairs, and any sliding piece in the sliding pair moves towards the outside of the ring track 100 when turning.

[0049] It is worth mentioning that "any sliding piece in the sliding pair moves towards the outside of the ring track 100 when turning" refers to the action description of one sliding piece in the sliding pair under specific working conditions (i.e. when turning), specifically, when the walking wheel performs a turning action, one sliding piece in the sliding pair will move towards the outside of the ring track 100 relative to the other sliding piece. "Outside" here is a relative concept, which refers to the outside direction of the curved part of the ring track 100. This design can adjust the posture of the walking wheel when turning to ensure smooth turning.

[0050] Referring to the accompanying drawings Figure 4 And 5 The sliding pair adopts a sliding rail 21 and a sliding block 22; the sliding rail 21 is installed at the bottom of the forklift body 1, and the sliding block 22 is correspondingly installed at the top of the walking wheel box 4 of the outer walking wheel.

[0051] Or the sliding rail 21 is installed at the top of the walking wheel box 4 of the outer walking wheel, and the sliding block 22 is correspondingly installed at the bottom of the forklift body 1.

[0052] In other embodiments of the utility model, telescopic connecting rod structure can also be used, which can include fixing seat, telescopic rod, driving mechanism and guide piece etc. The fixing seat is installed at the bottom of the forklift body, one end of the telescopic rod is connected with the traveling wheel box of the outer traveling wheel, the other end can be telescoped relative to the fixing seat, the driving mechanism is used for driving the telescoping movement of the telescopic rod, and the guide piece ensures the linear movement of the telescopic rod during telescoping.

[0053] When the forklift turns, the driving mechanism drives the telescopic rod to lengthen or shorten according to the turning signal, so that the spacing between the traveling wheel box of the outer traveling wheel and the traveling wheel box of the inner traveling wheel changes. The guide piece ensures that the movement direction of the telescopic rod is always consistent with the spacing adjustment direction, ensuring the stability and accuracy of the movement.

[0054] The advantage of this scheme is that the spacing can be accurately adjusted according to actual needs, and the adjustment accuracy is high. However, the disadvantage is that the structure is relatively complex, and an additional driving mechanism and control system are needed, which increases the cost and risk of failure, and the accuracy requirements of the driving mechanism and the guide piece are relatively high, otherwise the situation of jamming or unsmooth movement may occur. Therefore, the utility model preferably adopts a sliding pair cooperation mode such as sliding rail and sliding block.

[0055] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the utility model.

[0056] In some other embodiments of the utility model, the traveling wheel box 4 of the outer traveling wheel is connected with the traveling wheel self-adapting adjustment assembly 2 through a wheel box rotating assembly 3, which changes the angle of the traveling wheel box 4 of the outer traveling wheel when turning.

[0057] Specifically, referring to the accompanying drawings, Figure 4 The wheel box rotating assembly 3 includes: a bearing seat 31, the middle part of the traveling wheel assembly plate 23 is provided with a bearing seat mounting hole 231, the bearing seat 31 is installed in the bearing seat mounting hole 231 and extends downward, the traveling wheel assembly plate 23 supports the lower sliding part (sliding rail or sliding block) of the sliding pair, a rotating shaft 32 rotates in the bearing seat 31, a wheel box connecting plate 3 is connected with the rotating shaft 32 at the middle part of the top surface thereof, and the bottom thereof is connected to the top of the traveling wheel box 4 of the outer traveling wheel through a connecting column 34.

[0058] When turning, the traveling wheel box 4 of the outer traveling wheel can rotate by an angle relative to the forklift body 1, thereby improving the turning ability.

[0059] In some embodiments of the utility model, the inner walking wheel is a driving wheel, and the outer walking wheel is a driven wheel; the walking wheel box 4 bottom corresponding to the outer walking wheel and the inner walking wheel all have guiding assembly 44, and the walking wheel box 4 of the inner walking wheel has anti-overturning assembly 42. Thus, under the conditions of high speed, heavy load and fork extension, side turning is prevented.

[0060] Specifically, referring to the accompanying drawings Figures 6-10 The anti-overturning assembly 42 comprises:

[0061] The anti-overturning wheel mounting plate 421 is detachable on the outer side wall of the walking wheel box 4, and can be connected on the outer side wall of the walking wheel box 4 through a connecting pin;

[0062] The transmission shaft 422 is connected to the inner side of the lower part of the anti-overturning wheel mounting plate 421;

[0063] The anti-overturning wheel 423 is rotationally connected to the other end of the transmission shaft 422 and is located below the walking wheel box 4, and the width of the anti-overturning wheel 423 is consistent with the width of the lower end surface of the top plate of the ring track 100 and abuts against the lower end surface of the top plate of the ring track 100.

[0064] The utility model discloses a trolley capable of stably running on the upper surface of the I-beam track top plate through the anti-overturning assembly, and realizes that the outer periphery of the anti-overturning wheel abuts against the lower surface of the I-beam track top plate through the cooperation of the anti-overturning wheel mounting plate, the transmission shaft and the anti-overturning wheel, so that the overturning phenomenon of the trolley under the conditions of high speed, heavy load, fork extension, loading and unloading is prevented.

[0065] Advantageously, the spacing between the anti-overturning wheel 423 and the lower end surface of the top plate of the ring track 100 is adjusted through the anti-overturning wheel position adjusting assembly 43. Referring to the accompanying drawings Figures 6-10 The anti-overturning wheel position adjusting assembly 43 comprises:

[0066] The adjusting shaft 431 is rotationally connected to the shaft hole of the anti-overturning wheel mounting plate 421 and extends to the side away from the transmission shaft 422, and the axis of the adjusting shaft 431 is eccentrically arranged with the central axis of the transmission shaft 422; the adjusting shaft 431 is rotated to drive the anti-overturning wheel 423 to adjust the lifting, and at least two limiting holes are arranged on the anti-overturning wheel mounting plate 421, which can be three in this embodiment;

[0067] The limiting disc 432 is provided with a plurality of adjusting holes 4321, the middle part is clamped with the adjusting shaft 431, and the limiting holes and the corresponding adjusting holes 4321 are connected through a limiting piece, so that the spacing between the anti-overturning wheel 423 and the lower end surface of the top plate of the ring track 100 is maintained;

[0068] The two sides of the adjusting rotating shaft 431 are formed with limiting planes along the axial direction of the adjusting rotating shaft 431, and the limiting disc 432 is provided with a through hole matched with the adjusting rotating shaft, and the through hole is in a runway shape.

[0069] Referring to the drawings Figure 6 The guide assembly 44 can include L-shaped guide wheel mounting plates 441 and guide wheels 442, the vertical plates of the guide wheel mounting plates 441 are fixed on the side walls of the walking wheel box 4, the guide wheels 442 are provided in multiple numbers and are arranged in pairs, each pair of the guide wheels 442 is mounted on the horizontal plate of the guide wheel mounting plate 441, and the circumferences of each of the guide wheels 442 are in rolling abutment with the side walls of the web of the I-shaped rail, thereby playing a guiding role.

[0070] In the utility model, unless another definite provision and limitation, the terms "mounting", "connecting", "connecting", "fixing" and the like terms should be understood in a broad sense, for example, can be fixed connection, or can be detachable connection, or can be integrated; can be directly connected, or can be indirectly connected through an intermediate medium, for ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0071] In the embodiment of the utility model, further include power supply assembly and PLC control box 6, the power supply assembly includes slide wire and current collecting arm 5, the slide wire is arranged along the inside I-shaped rail of the annular track 100, is located on the bottom plate of the inside I-shaped rail, or is arranged in parallel with the inside I-shaped rail, the current collecting arm 5 is fixed on the walking wheel box 4 and is in abutment with the slide wire to take power, and the PLC control box 6 is electrically connected with the slide wire and is electrically connected with the driving motor 41 of the walking wheel box 4 of the inside walking wheel.

[0072] In the utility model, the walking wheel box is driven by a motor, so that the RGV forklift completes the action of driving on the track, the forklift body completes the action of taking and placing goods of the RGV on the conveying line, and the PLC control box 6 controls the operation of the forklift body.

[0073] In the utility model, the slide wire and the current collecting arm 5 contact to take power, and the power supply to the vehicle body is completed. When the vehicle body runs to the set station, the action stops, and the vehicle-mounted forks above the vehicle body take and place goods. When the vehicle-mounted forks are extended to take goods, the center of gravity of the vehicle body deviates, at this time, the anti-overturning assembly acts to mechanically limit the vehicle body, so that the anti-overturning effect is realized. The guide wheels are installed on the front and rear sides of the walking wheel box, clamp the two sides of the track to guide the operation of the vehicle body, prevent the vehicle body from deviating and driving out of the track, and play a guiding role.

[0074] When the vehicle body enters a turn, the sliding block moves outward on the guide rail, changing the distance between the inner walking wheel box and the outer walking wheel box, and the wheel box rotation assembly changes the angle of the outer walking wheel box during the turn, allowing the vehicle body to turn without becoming stuck.

[0075] The utility model not only overcomes the limitation of prior art, but also brings many technical advantages, including improving adaptability, enhancing stability, precise control, and convenient maintenance, making it an ideal choice for industrial automation and logistics fields.

[0076] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.

[0077] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model. Those skilled in the art can change, modify, replace and modify the above-mentioned embodiments within the scope of the utility model.

Claims

1. A loop track RGV forklift, comprising a forklift body (1), the outer walking wheels and the inner walking wheels correspondingly move on two loop tracks (100), characterized in that, Also included are; The walking wheel adaptive adjustment assembly (2) is installed between the bottom of the forklift body (1) and the walking wheel box (4) of the outer walking wheel. When turning, at least part of the component can follow the movement of the outer walking wheel towards the outside of the loop track (100), changing the distance between the walking wheel box (4) of the outer walking wheel and the walking wheel box (4) of the inner walking wheel; and the walking wheel box (4) of the outer walking wheel is rotationally connected with the walking wheel adaptive adjustment assembly (2).

2. The loop rail type RGV fork truck according to claim 1, characterized in that, The walking wheel adaptive adjustment assembly (2) includes at least one set of sliding pairs, and any sliding member of the sliding pairs moves in a direction pointing to the outside of the loop track (100) when turning.

3. The loop track RGV fork truck according to claim 2, characterized in that, The sliding pair adopts a sliding rail (21) and a sliding block (22), the sliding rail (21) is installed on the bottom of the forklift body (1) or the top of the walking wheel box (4) of the outer walking wheel, and the sliding block (22) is correspondingly installed on the top of the walking wheel box (4) of the outer walking wheel or the bottom of the forklift body (1).

4. The loop track RGV fork truck according to claim 2, characterized in that, The walking wheel box (4) of the outer walking wheel is connected with the walking wheel adaptive adjustment assembly (2) through a wheel box rotation assembly (3), so as to change the angle of the walking wheel box (4) of the outer walking wheel when turning.

5. The loop track RGV fork truck according to claim 4, characterized in that, The wheel box rotation assembly (3) includes: A bearing seat (31) is installed on the bottom of the walking wheel assembly plate (23), and the walking wheel assembly plate (23) supports the lower sliding member of the sliding pair; A rotating shaft (32) is rotationally arranged in the bearing seat (31); A wheel box connecting plate (33) is connected to the top of the walking wheel box (4) of the outer walking wheel.

6. The loop track RGV fork truck according to claim 1, characterized in that, The inner walking wheel is a driving wheel, and the outer walking wheel is a driven wheel; the bottom of the walking wheel box (4) of the outer walking wheel and the bottom of the walking wheel box (4) of the inner walking wheel correspondingly have a guide assembly (44), and the walking wheel box (4) of the inner walking wheel has an anti-overturning assembly (42).

7. The loop track RGV fork truck according to claim 6, characterized in that, The anti-overturning assembly (42) includes: An anti-overturning wheel mounting plate (421) is detachably arranged on the outer side wall of the walking wheel box (4); A transmission shaft (422) is connected to the lower inner side of the anti-overturning wheel mounting plate (421); An anti-overturning wheel (423) is rotationally connected to the other end of the transmission shaft (422) and is located below the walking wheel box (4), and the width of the anti-overturning wheel (423) is consistent with the width of the lower end surface of the top plate of the loop track (100) and abuts against the lower end surface of the top plate of the loop track (100).

8. The loop track RGV fork truck according to claim 7, characterized in that, The distance between the anti-overturning wheel (423) and the lower end surface of the top plate of the loop track (100) is adjusted by an anti-overturning wheel position adjusting assembly (43).

9. The loop rail guided vehicle (RGV) fork truck of claim 8, wherein, The anti-overturning wheel position adjusting assembly (43) includes: An adjusting rotating shaft (431) is rotationally connected to the shaft hole of the anti-overturning wheel mounting plate (421) and extends away from the transmission shaft (422), and the axis of the adjusting rotating shaft (431) is eccentrically arranged with the central axis of the transmission shaft (422); the adjusting rotating shaft (431) rotates to drive the anti-overturning wheel (423) to adjust the lifting; at least two limiting holes are arranged on the anti-overturning wheel mounting plate (421). A limiting disc (432) is arranged on the adjusting shaft (431) and connected with the limiting hole through a limiting member, so as to keep the distance between the anti-overturning wheel (423) and the lower end surface of the top plate of the ring track (100).

10. The loop track RGV fork truck according to claim 1, characterized in that, The power supply assembly and a PLC control box (6) are further included. The power supply assembly includes a slide wire and a current collecting arm (5). The slide wire is arranged along the inner I-shaped steel rail of the ring track (100), located on the bottom plate of the inner I-shaped steel rail, or arranged in parallel with the inner I-shaped steel rail. The current collecting arm (5) is fixed on the walking wheel box (4) and abuts against the slide wire to collect electricity. The PLC control box (6) is electrically connected with the slide wire and the driving motor (41) of the walking wheel box (4) of the inner walking wheel.

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