Overtaking system applied to annular RGV

Abstract

The overtaking system applied to the annular RGV comprises a trolley and a track assembly, and the track assembly comprises a main track, a stagnation track, an overtaking track and a reversing piece; the reversing piece comprises a first straight rail, a second straight rail, a third straight rail, a fourth straight rail, a first bent rail, a second bent rail and a third bent rail; when the main rail is matched with the first straight rail and the stagnation rail and the main rail is matched with the second straight rail, the third straight rail, the fourth straight rail and the stagnation rail, the trolley is in a normal advancing state; when the main track is matched with the first bent track, the second bent track, the fourth straight track and the overtaking track and the main track is matched with the second bent track and the overtaking track, the trolley is in an overtaking state, and when the trolley in the position of the stagnation track is loading and unloading goods or stops due to faults, the reversing part is adjusted by sliding and rotating the reversing part, so that the trolley is in an overtaking state. The follow-up trolley enters the overtaking track for overtaking, and the conveying efficiency of the system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of logistics warehousing and transportation, and particularly relates to an overtaking system applied to a circular RGV. Background Art

[0002] With the continuous development of the logistics transportation industry, the requirements for the efficiency of logistics transportation are also constantly increasing. The circular shuttle vehicle system is widely used in the automated warehousing system due to its wide operating capacity range and high scheduling flexibility.

[0003] In a loop, usually, the means of increasing the number of trolleys is adopted to enhance the transportation capacity of the system. However, from the structural characteristics of the circular shuttle vehicle system, all trolleys run sequentially on a set of closed tracks. When the "catch-up effect" occurs between the first trolley and the last trolley in the system, the system is about to reach its peak capacity. After the "catch-up effect" occurs, system congestion is very likely to occur. Moreover, in a closed loop, once a trolley breaks down or the loading and unloading of goods stagnates, all the following trolleys need to stop and wait, greatly reducing the transportation capacity of the system. Summary of the Invention

[0004] The purpose of the present invention is to provide an overtaking system applied to a circular RGV to solve the above deficiencies in the prior art.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions: An overtaking system applied to a circular RGV includes a trolley and a track assembly. The track assembly includes a main track, a stagnant track, an overtaking track, and a reversing member; The reversing member includes a first straight track, a second straight track, a third straight track, a fourth straight track, a first curved track, a second curved track, and a third curved track; When the main track is adapted to the first straight track and the stagnant track, and the main track is adapted to the second straight track, the third straight track, the fourth straight track, and the stagnant track, the trolley is in a normal traveling state; When the main track is adapted to the first curved track, the second curved track, the fourth straight track, and the overtaking track, and the main track is adapted to the second curved track and the overtaking track, the trolley is in an overtaking state.

[0006] Preferably, it further includes a support frame. A sliding frame is slidably arranged on the support frame. The third straight track and the second curved track are both fixedly connected to the support frame. The first straight track, the second straight track, the first curved track, and the third curved track are all fixedly connected to the sliding frame.

[0007] Preferably, it further includes a turntable. The turntable is fixedly connected to the fourth straight track. A connecting rod is arranged between the turntable and the sliding frame. The two ends of the connecting rod are respectively rotatably connected to the turntable and the sliding frame.

[0008] Preferably, both ends of the fourth straight rail are provided with arc surfaces, and arc surfaces are also provided on the stagnant rail, overtaking rail, third straight rail and second curved rail.

[0009] Preferably, a motor is fixedly arranged on the support frame, a rotating plate is fixedly arranged on the output shaft of the motor, a fixed seat is fixedly arranged on the rotating plate, a sliding seat is slidably arranged on the fixed seat, a rocker arm is rotatably arranged on the sliding seat, and the rocker arm is rotatably connected to the sliding frame.

[0010] Preferably, a buffer assembly is further included to buffer the vibrations received by the first curved rail, the third curved rail and the sliding frame when the trolley is in the overtaking state; The buffer assembly includes a buffer spring, the buffer spring is arranged between the sliding seat and the fixed seat, and both ends of the buffer spring are fixedly connected to the sliding seat and the fixed seat respectively.

[0011] Preferably, the buffer assembly further includes a guide block rotatably arranged on the rocker arm, two guide rails are fixedly arranged on the support frame, a guide groove is formed between the two guide rails, and the guide block is arranged in the guide groove.

[0012] Preferably, arc portions are arranged on both of the two guide rails, the two arc portions correspond to each other, and the bending directions are opposite.

[0013] Preferably, two driving wheels are arranged on the trolley, two sliding rails are fixedly arranged on the trolley, and driven wheels are arranged on both of the two sliding rails.

[0014] Preferably, the rotation angle of the turntable is 45°.

[0015] In the above technical solution, the beneficial effects of an overtaking system for a ring-shaped RGV provided by the present invention are as follows: 1. When the trolley in the stagnant rail position is loading or unloading goods or is stalled due to a fault, by sliding and rotating the reversing member, the subsequent trolley can enter the overtaking rail for overtaking, improving the conveying efficiency of the system.

[0016] 2. When the trolley overtakes through the overtaking rail, friction occurs between the trolley wheels and the rail, resulting in vibrations of the first curved rail, the third curved rail and the sliding frame. At this time, through the buffer assembly, the vibrations received by the first curved rail, the third curved rail and the sliding frame are buffered, preventing the sliding between the sliding frame and the support frame from becoming unstable after long-term use, which may cause deviations in the adjustment between the reversing member and the main rail, stagnant rail and overtaking rail.

[0017] 3. By slidingly connecting two driven wheels located inside the track to the trolley through sliding rails, when passing through the curved track during overtaking, the driven wheels slide laterally, increasing the freedom between the traveling wheels of the trolley and the track, providing room for free adjustment of the traveling wheels at the front and rear positions, and avoiding the formation of an angle between the front and rear wheels when the trolley overtakes through the curved track, which may cause the trolley to brake due to the force and, in severe cases, damage the track.

[0018] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the present disclosure.

[0019] This application document provides an overview of various implementations or examples of the technologies described in the present disclosure and is not a full disclosure of the entire scope of the disclosed technologies or all features. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments described in the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0021] Figure 1 Schematic diagram of the trolley structure provided by the embodiment of the present invention; Figure 2 Schematic diagram of the overall track structure provided by the embodiment of the present invention; Figure 3 Top view structure diagram of the track provided by the embodiment of the present invention; Figure 4 Schematic diagram of the support frame and sliding frame structure provided by the embodiment of the present invention; Figure 5 Top view structure diagram of the support frame and sliding frame provided by the embodiment of the present invention; Figure 6 Schematic diagram of the buffer mechanism structure provided by the embodiment of the present invention; Figure 7 Schematic diagram of the guide rail structure provided by the embodiment of the present invention.

[0022] Description of the reference numerals: 1. Trolley; 11. Driving wheel; 12. Driven wheel; 13. Sliding rail; 2. Main track; 21. Stagnation track; 22. Overtaking track; 3. First straight track; 31. Second straight track; 32. Third straight track; 33. Fourth straight track; 4. First curved track; 41. Second curved track; 42. Third curved track; 5. Support frame; 51. Sliding frame; 52. Guide rail; 53. Arc portion; 6. Turntable; 61. Link; 7. Motor; 71. Rotating plate; 72. Fixed seat; 73. Sliding seat; 74. Buffer spring; 75. Rocker arm; 76. Guide block. Detailed implementation manners

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some but not all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0024] Please refer to Figures 1 - 7 , an overtaking system applied to a ring-shaped RGV, including a trolley 1 and a track assembly. The track assembly includes a main track 2, a stagnant track 21, an overtaking track 22, and a reversing member; the reversing member includes a first straight track 3, a second straight track 31, a third straight track 32, a fourth straight track 33, a first curved track 4, a second curved track 41, and a third curved track 42; when the main track 2 is adapted to the first straight track 3 and the stagnant track 21, and the main track 2 is adapted to the second straight track 31, the third straight track 32, the fourth straight track 33, and the stagnant track 21, the trolley 1 is in a normal traveling state; when the main track 2 is adapted to the first curved track 4, the second curved track 41, the fourth straight track 33, and the overtaking track 22, and the main track 2 is adapted to the second curved track 41 and the overtaking track 22, the trolley 1 is in an overtaking state. When the trolley 1 travels to the position of the stagnant track 21 and breaks down or needs to be loaded or unloaded, by adjusting the sliding and rotation of the first straight track 3, the second straight track 31, the third straight track 32, the fourth straight track 33, the first curved track 4, the second curved track 41, and the third curved track 42, the track is switched to the overtaking state to avoid the stagnant trolley 1 and improve the conveying efficiency of the system; in the present invention, the main track 2, the stagnant track 21, and the overtaking track 22 are all provided in two. That is, when one main track 2 is adapted to the first straight track 3 and one stagnant track 21, the other main track 2 is adapted to the other stagnant track 21 through the second straight track 31, the third straight track 32, and the fourth straight track 33, thereby forming a complete normal traveling track for the trolley 1; when one main track 2 is adapted to one overtaking track 22 through the first curved track 4, the second curved track 41, and the fourth straight track 33, the other main track 2 is adapted to the other overtaking track 22 through the second curved track 41, enabling the trolley 1 to travel to the overtaking track 22.

[0025] In the present invention, the overtaking state of the trolley 1 means that during the traveling process of the trolley 1, through the adjustment of the track, the traveling direction enters the overtaking track 22 from the main track 2, and the normal traveling state is the traveling direction in which the trolley 1 enters the stagnant track 21 from the main track 2 during the traveling process of the trolley 1.

[0026] It further includes a support frame 5. A sliding frame 51 is slidably arranged on the support frame 5. The third straight rail 32 and the second curved rail 41 are both fixedly connected to the support frame 5. The first straight rail 3, the second straight rail 31, the first curved rail 4, and the third curved rail 42 are all fixedly connected to the sliding frame 51. When switching to the overtaking state, the sliding frame 51 slides, driving the first straight rail 3, the second straight rail 31, the first curved rail 4, and the third curved rail 42 to slide synchronously. The first straight rail 3 and the second straight rail 31 are staggered from the main track 2 and the stagnant track 21, and the third curved rail 42 is aligned with the main track 2 and the overtaking track 22, and the first curved rail 4 is aligned with the main track 2 and the second curved rail 41. At the same time, the fourth straight rail 33 rotates to align with the second curved rail 41 and the stagnant track 21, enabling the trolley 1 to travel from the main track 2 to the overtaking track 22.

[0027] It further includes a turntable 6. The turntable 6 is fixedly connected to the fourth straight rail 33. A connecting rod 61 is arranged between the turntable 6 and the sliding frame 51. The two ends of the connecting rod 61 are respectively rotatably connected to the turntable 6 and the sliding frame 51. When switching to the overtaking state, during the sliding process of the sliding frame 51, the turntable 6 is driven to drive the fourth straight rail 33 to rotate by pushing the connecting rod 61, so that the fourth straight rail 33 is aligned with the second curved rail 41 and the stagnant track 21, completing the switching of the overtaking state. The rotation angle of the turntable 6 is 45°. Whether it is in the normal traveling state or during the switching to the overtaking state, rotating the turntable 6 by 45° or resetting and rotating it by 45° can better enable the sliding frame 51 to ensure the stability of the fourth straight rail 33 through the connecting rod 61.

[0028] Both ends of the fourth straight rail 33 are set as arc-shaped surfaces, and arc-shaped surfaces are provided on the stagnant track 21, the overtaking track 22, the third straight rail 32, and the second curved rail 41. The arc-shaped surface on the fourth straight rail 33 is set as a convex surface, and the arc-shaped surfaces provided on the stagnant track 21, the overtaking track 22, the third straight rail 32, and the second curved rail 41 are set as concave surfaces, so that the fourth straight rail 33 is not interfered during the rotation process, and through the adaptation of the arc-shaped surface to the stagnant track 21, the overtaking track 22, the third straight rail 32, and the second curved rail 41, the trolley 1 can travel more stably.

[0029] A motor 7 is fixedly arranged on the support frame 5. A rotating plate 71 is fixedly arranged on the output shaft of the motor 7. A fixed seat 72 is fixedly arranged on the rotating plate 71. A sliding seat 73 is slidably arranged on the fixed seat 72. A rocker arm 75 is rotatably arranged on the sliding seat 73. The rocker arm 75 is rotatably connected to the sliding frame 51. The motor 7 drives the rotating plate 71 to rotate, and through the rotatably arranged rocker arm 75, the sliding frame 51 is pushed or pulled to slide, thereby completing the switching between the normal traveling of the trolley 1 and the overtaking state.

[0030] It also includes a buffer component, which buffers the vibrations received by the first curved rail 4, the third curved rail 42, and the sliding frame 51 when the trolley 1 is in the overtaking state; the buffer component includes a buffer spring 74, and the buffer spring 74 is arranged between the sliding seat 73 and the fixed seat 72, and both ends of the buffer spring 74 are fixedly connected to the sliding seat 73 and the fixed seat 72 respectively. When the trolley 1 is in the overtaking state, the trolley 1 goes straight from the main track 2 into the first curved rail 4 and the third curved rail 42. Due to the conversion from the straight state to the turning state, there will be extrusion friction between the wheels and the first curved rail 4 and the third curved rail 42, which will cause vibrations in the first curved rail 4, the third curved rail 42, and the sliding frame 51. After long-term use, the sliding between the sliding frame 51 and the support frame 5 will become unstable, resulting in deviations when the sliding frame 51 slides to switch the track. By setting the buffer spring 74, when the trolley 1 enters the first curved rail 4 and the third curved rail 42, the vibration force received by the sliding frame 51 is buffered, avoiding the phenomenon that the sliding connection between the sliding frame 51 and the support frame 5 becomes unstable due to wear caused by long-term vibration when the sliding frame 51 slides on the support frame 5, resulting in sliding deviation of the sliding frame 51, effectively improving the service life and stability of the overtaking system. Moreover, when the buffer spring 74 slides and expands to buffer the vibration force of the sliding frame 51, the lateral reciprocating sliding displacement distance of the sliding frame 51 is short, and it will not cause deviations in the first curved rail 4 and the third curved rail 42 due to excessive sliding with the sliding frame 51, affecting the overtaking track 22 of the trolley 1.

[0031] The buffer component further includes a guide block 76 rotatably arranged on the rocker arm 75. Two guide rails 52 are fixedly arranged on the support frame 5. A guide groove is formed between the two guide rails 52. The guide block 76 is arranged in the guide groove. Arc-shaped parts 53 are arranged on both guide rails 52. The two arc-shaped parts 53 correspond to each other and are arranged with opposite bending directions. When the trolley 1 is in the overtaking state, the guide rail is located between the two arc-shaped parts 53. At this time, the trolley 1 goes straight from the main track 2 into the first curved rail 4 and the third curved rail 42. Under the action of vibration, the sliding frame 51 drives the rocker arm 75 to make a slight slide and is buffered by the buffer spring 74. When the trolley 1 is not in the overtaking state, the guide block 76 is in contact with the two arc-shaped parts 53, and at this time, the stability of the sliding frame 51, the first curved rail 4, and the third curved rail 42 can be ensured.

[0032] Two driving wheels 11 are arranged on the trolley 1. Two sliding rails 13 are fixedly arranged on the trolley 1. Driven wheels 12 are arranged on both sliding rails 13. By making the two driven wheels 12 located inside the track be slidably connected to the trolley 1 through the sliding rails 13, when overtaking and passing through the curved rail, there will be an included angle in the force received by the trolley 1. At this time, the driven wheels 12 slide laterally, so that there is a space for free adjustment of the traveling wheels at the front and rear positions, avoiding the formation of an included angle between the front and rear wheels when the trolley 1 overtakes and passes through the curved rail, and the braking caused by the force on the trolley 1.

[0033] Only some exemplary embodiments of the present invention have been described by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An overtaking system applied to a circular RGV, comprising a trolley (1) and a track assembly, characterized in that, The track assembly includes a main track (2), a stagnant track (21), an overtaking track (22), and a reversing member; The reversing member includes a first straight track (3), a second straight track (31), a third straight track (32), a fourth straight track (33), a first curved track (4), a second curved track (41), and a third curved track (42); When the main track (2) is adapted to the first straight track (3) and the stagnant track (21), and the main track (2) is adapted to the second straight track (31), the third straight track (32), the fourth straight track (33), and the stagnant track (21), the trolley (1) is in a normal traveling state; When the main track (2) is adapted to the first curved track (4), the second curved track (41), the fourth straight track (33), and the overtaking track (22), and the main track (2) is adapted to the second curved track (41) and the overtaking track (22), the trolley (1) is in an overtaking state.

2. The overtaking system applied to a circular RGV according to claim 1, characterized in that, It further includes a support frame (5), a sliding frame (51) is slidably arranged on the support frame (5), the third straight track (32) and the second curved track (41) are both fixedly connected to the support frame (5), and the first straight track (3), the second straight track (31), the first curved track (4), and the third curved track (42) are all fixedly connected to the sliding frame (51).

3. The overtaking system applied to a circular RGV according to claim 2, characterized in that, It further includes a turntable (6), the turntable (6) is fixedly connected to the fourth straight track (33), a connecting rod (61) is arranged between the turntable (6) and the sliding frame (51), and both ends of the connecting rod (61) are rotatably connected to the turntable (6) and the sliding frame (51) respectively.

4. The overtaking system applied to a circular RGV according to claim 1, characterized in that, Both ends of the fourth straight track (33) are provided with arc-shaped surfaces, and arc-shaped surfaces are also provided on the stagnant track (21), the overtaking track (22), the third straight track (32), and the second curved track (41).

5. The overtaking system applied to a circular RGV according to claim 2, characterized in that, A motor (7) is fixedly arranged on the support frame (5), a rotating plate (71) is fixedly arranged on the output shaft of the motor (7), a fixed seat (72) is fixedly arranged on the rotating plate (71), a sliding seat (73) is slidably arranged on the fixed seat (72), a rocker arm (75) is rotatably arranged on the sliding seat (73), and the rocker arm (75) is rotatably connected to the sliding frame (51).

6. The overtaking system applied to a circular RGV according to claim 5, characterized in that, It further includes a buffer assembly, when the trolley (1) is in an overtaking state, it buffers the vibrations received by the first curved track (4), the third curved track (42), and the sliding frame (51); The buffer assembly includes a buffer spring (74), the buffer spring (74) is arranged between the sliding seat (73) and the fixed seat (72), and both ends of the buffer spring (74) are fixedly connected to the sliding seat (73) and the fixed seat (72) respectively.

7. The overtaking system applied to a circular RGV according to claim 6, characterized in that, The buffer assembly further includes a guide block (76) rotatably arranged on the rocker arm (75), two guide rails (52) are fixedly arranged on the support frame (5), a guide groove is formed between the two guide rails (52), and the guide block (76) is arranged in the guide groove.

8. The overtaking system applied to a circular RGV according to claim 7, characterized in that, Arc-shaped portions (53) are arranged on both of the two guide rails (52), the two arc-shaped portions (53) correspond to each other, and their bending directions are opposite.

9. The overtaking system applied to a circular RGV according to claim 7, characterized in that, There are two driving wheels (11) provided on the trolley (1), and two slide rails (13) are fixedly provided on the trolley (1), and driven wheels (12) are provided on both of the two slide rails (13).

10. The overtaking system applied to a circular RGV according to claim 3, characterized in that, The rotation angle of the turntable (6) is 45°.

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