High-speed circulating conveying device integrating speed changing and positioning functions

Abstract

The utility model discloses a high-speed circulating conveying device integrating speed changing and positioning functions, which comprises a station conveying line body and an acceleration conveying line body which are arranged on a rack, and a carrying seat is arranged on the station conveying line body; a left rotation line body and a right rotation line body are arranged at the two ends of the left rotation line body and the right rotation line body respectively, and carrying seats are arranged on the left rotation line body and the right rotation line body respectively; the station conveying line body and the acceleration conveying line body are each provided with a single-face-tooth synchronous belt I capable of rotating, the left rotation line body and the right rotation line body are each provided with a single-face-tooth synchronous belt II capable of rotating, and the conveying faces of the single-face-tooth synchronous belts II and the conveying faces of the single-face-tooth synchronous belts I form a circular ring. The outer side of the conveying face is sleeved with a guide rail, a carrying base used for carrying workpieces is arranged on the guide rail in a sliding mode, a toothed plate is fixedly arranged at the bottom of the carrying base, and teeth of the toothed plate are meshed with the tooth face of the single-face tooth synchronous belt I and the tooth face of the single-face tooth synchronous belt II. The multi-speed switching control device has the advantages of automatically achieving multi-speed switching control, achieving efficient conveying of the carrying base and greatly improving use efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to conveying technical field, specifically, especially, a kind of high-speed circulation conveying device of integration of variable speed and positioning function. BACKGROUND

[0002] Conveying industry is the core support field of industrial production and logistics system, and its technical development deeply influences manufacturing efficiency, resource flow speed and production cost.

[0003] As the authorized announcement No.CN216189536U discloses a kind of adjustable belt conveyor, including bottom plate, its characterized in that, the bottom plate is provided with two groups of carrier rollers above, two groups of carrier roller are provided with conveying belt above, two groups of carrier roller both sides are movably connected with support piece, the support piece lower end is fixedly connected with bottom plate, the carrier roller one side is fixedly connected with connecting rod, and connecting rod one end penetrates support piece, the bottom plate upper end is fixedly connected with first motor, the first motor output end and the connecting rod one section are fixedly connected with first connecting shaft, two groups of first connecting shaft are provided with belt above. However, the transmission speed of the conveying belt of the conveyor is always consistent, which requires a large number of seats to be installed on the conveying belt to achieve uninterrupted conveying. For high-precision workpiece seats, their prices are expensive, and excessive assembly quantity will greatly increase the cost. Moreover, it also increases the overall weight of the conveyor, which is not conducive to reasonable layout. In addition, when workpieces are processed at other stations, the motor needs to be controlled to stop working at any time. Repeated start and stop of the motor will cause insufficient heat dissipation, leading to overheating and shortening the service life. In extreme cases, it may cause fire and pose a safety hazard. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the deficiencies in the prior art, and provides a high-speed circulation conveying device integrating variable speed and positioning functions.

[0005] The utility model achieves the above-mentioned purpose by the following technical solutions.

[0006] A high-speed circulation conveying device integrating variable speed and positioning functions, comprising a rack, wherein the rack is provided with a work station conveying line body and an acceleration conveying line body which are vertically arranged and centrally symmetrical, the work station conveying line body is provided with a seat corresponding to a machining station on one side thereof for carrying workpieces, left and right rotating line bodies are respectively arranged at both ends of the work station conveying line body and the acceleration conveying line body, and the left and right rotating line bodies are respectively provided with seats corresponding to feeding and discharging stations.

[0007] Both the station conveyor line and the acceleration conveyor line have a self-rotating single-sided toothed synchronous belt I, and the left rotary line and the right rotary line have a self-rotating single-sided toothed synchronous belt II. The conveying surfaces of all the single-sided toothed synchronous belts II and I are combined to form a circulating elliptical conveying surface.

[0008] A guide rail is fitted on the outer side of the conveying surface, and the carrier is slidably mounted on the guide rail. The bottom of the carrier is provided with a vertically movable toothed plate. The teeth of the toothed plate mesh with the tooth surfaces of the single-sided toothed synchronous belt I and the single-sided toothed synchronous belt II, and the distance between the outermost teeth is less than the distance between the single-sided toothed synchronous belt I and the single-sided toothed synchronous belt II. The frame is also provided with a positioning component, which can drive all the toothed plates to move upward synchronously and separate from the single-sided toothed synchronous belt I and the single-sided toothed synchronous belt II.

[0009] Preferably, both the station conveyor line and the acceleration conveyor line include at least one set of conveying idlers pivotally mounted on the frame, the non-toothed surface of the single-sided toothed synchronous belt I is wound around the conveying idlers, and the conveying surface of the single-sided toothed synchronous belt I is horizontal.

[0010] Preferably, the workstation conveyor line and the acceleration conveyor line further include a conveyor gear pivotally mounted on the frame, the conveyor gear meshing with the tooth surface of the single-sided synchronous belt I, and a conveyor motor fixedly mounted on the frame, the motor shaft of the conveyor motor being connected to any of the conveyor gears.

[0011] Preferably, both the left and right rotary conveyors include at least a pivotally mounted drive wheel, with a drive idler wheel on one side of the drive wheel. The non-toothed surface of the single-sided toothed synchronous belt II is wound around the drive wheel and the drive idler wheel, and the conveying surface of the single-sided toothed synchronous belt II is U-shaped.

[0012] Preferably, the left and right rotary lines further include rotary gears pivotally mounted on the frame, the rotary gears meshing with the tooth surface of the single-sided synchronous belt II, and a rotary motor fixedly mounted on the frame, the motor shaft of the rotary motor being connected to the rotary gears.

[0013] Preferably, the carrier has a vertically arranged support plate, the top of the support plate is fixed with a mounting plate for mounting the workpiece, and the bottom of the support plate is fixed with the toothed plate; the support plate is pivotally provided with an upper guide wheel and a lower guide wheel, which are arranged vertically and vertically respectively; guide grooves are opened on both sides of the guide rail; the upper guide wheel and the lower guide wheel are both placed in the guide grooves, and the outer circumferential surfaces of the upper guide wheel and the lower guide wheel abut against the guide rail.

[0014] Preferably, the positioning assembly includes at least a slide rail fixed to the frame and vertically arranged, a slider adapted to the slide rail, a push rod fixed to the slider, and a push wheel pivotally mounted on the push rod; a guide rod fixed to the toothed plate, a positioning block fixed to the other end of the guide rod, the positioning block extending into a groove opened on the support plate; a spring sleeved on the guide rod, one end of the spring abutting against the toothed plate, the other end abutting against the positioning block, and the push wheel abutting against the positioning block.

[0015] Preferably, a guide block is fixed on the frame, a guide rail adapted to it is slidably mounted on the guide block, a fixing block is fixed on the guide rail, a connecting rod is pivotally mounted on the fixing block, and the other end of the connecting rod is pivotally mounted on the slider.

[0016] Preferably, a bracket is fixed on the frame, a drive cylinder is fixed on the bracket, a drive block is fixed on the cylinder shaft of the drive cylinder, and the drive block is fixed on the guide rail.

[0017] The beneficial effects of this utility model are mainly reflected in:

[0018] 1. In the conveying method of this utility model, when the carrier is transferred between the station conveyor line, the accelerating conveyor line, the left rotary line, and the right rotary line, the single-sided toothed synchronous belt I and the single-sided toothed synchronous belt II can complete the transfer by maintaining the same rotation speed. After the transfer is completed, the left rotary line and the right rotary line can automatically control their speeds to achieve efficient conveying of the carrier and thus improve the utilization efficiency. Based on this, this utility model can significantly reduce the number of carriers, thereby achieving overall lightweighting of the device and greatly reducing costs.

[0019] 2. The toothed plate and the single-sided toothed synchronous belt mesh with each other, ensuring precise transmission of the entire device. There is no slippage or jumping during transmission, and impact and vibration are avoided, ensuring smooth operation. Furthermore, direct meshing transmission reduces friction in intermediate links, resulting in significantly higher energy conversion efficiency than belt or chain drives. It can also withstand high loads and has wide applicability.

[0020] 3. In this utility model, the outer circumferential surfaces of the upper guide wheel and the lower guide wheel abut against the guide rail, which ensures that the carrier is always mounted on the guide rail, preventing the carrier from falling off and increasing the stability of the carrier's movement. Moreover, the toothed plate can move upward a small distance under the action of the positioning component, thereby separating the toothed plate from the single-sided toothed timing belt and achieving precise positioning of the carrier, so as to facilitate its processing at the loading station, processing station and unloading station.

[0021] 4. The conveying method of this utility model solves the problem of needing to control the motor to start and stop multiple times during workpiece processing by controlling the rapid separation of the toothed plate and the single-sided toothed synchronous belt, thus effectively improving the motor's lifespan.

[0022] 5. The drive cylinder can drive multiple carriers to be positioned synchronously through multiple connecting rods, and its drive source is only one drive cylinder, which can greatly reduce costs and facilitate mass production.

[0023] 6. The use of linkage drive can improve the precise displacement control of the device. At the same time, it can also withstand long-term high-load operation, reduce the frequency of downtime maintenance due to wear, and greatly extend the service life. Attached Figure Description

[0024] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0025] Fig. 1 : A perspective view of a preferred embodiment of the present invention;

[0026] Fig. 2 : Rear view of a preferred embodiment of this utility model;

[0027] Fig. 3 : A schematic diagram of the structure of the carrier and positioning assembly in a preferred embodiment of this utility model;

[0028] Fig. 4 : A schematic diagram of the structure of the carrier and positioning assembly in the preferred embodiment of this utility model. In this case, the top rod and the top wheel are removed. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] like Figs. 1 to 4As shown, this utility model discloses a high-speed circulating conveyor device integrating speed change and positioning functions. It includes a frame 1, on which are vertically and centrally symmetrically arranged station conveyor lines 2 and acceleration conveyor lines 9. Each station conveyor line 2 has a carrier 5 corresponding to a processing station located on one side of it. A left rotary conveyor line 3 and a right rotary conveyor line 8 are respectively located at both ends of the station conveyor line 2 and acceleration conveyor line 9. Each left rotary conveyor line 3 and right rotary conveyor line 8 has a carrier 5 corresponding to a loading station and a unloading station, respectively. In this utility model, when the carrier is transferred between the station conveyor line, acceleration conveyor line, left rotary conveyor line, and right rotary conveyor line, the single-sided toothed synchronous belt I and single-sided toothed synchronous belt II maintain the same rotational speed to complete the transfer. After the transfer is completed, the left rotary conveyor line and right rotary conveyor line can automatically control their speeds to achieve efficient carrier transport, thereby improving utilization efficiency. Based on this, the present invention can significantly reduce the number of carriers, thereby achieving overall lightweighting of the device and greatly reducing costs.

[0033] Specifically, both the station conveyor line 2 and the accelerating conveyor line 9 include at least one set of conveying idler pulleys 22 pivotally mounted on the frame 1. The non-toothed surface of the single-sided toothed synchronous belt I21 is wound around the conveying idler pulleys 22, and the conveying surface 10 of the single-sided toothed synchronous belt I21 is horizontal. The station conveyor line 2 and the accelerating conveyor line 9 also include conveying gears 23 pivotally mounted on the frame 1. The conveying gears 23 mesh with the toothed surface of the single-sided toothed synchronous belt I21. A conveying motor 26 is also fixed on the frame 1, and the motor shaft of the conveying motor 26 is connected to any of the conveying gears 23.

[0034] Both the left rotary conveyor 3 and the right rotary conveyor 8 include at least one pivotally mounted on the drive wheel 32. A drive idler wheel 33 is provided on one side of the drive wheel 32. The non-tooth surface of the single-sided toothed synchronous belt II 31 is wound around the drive wheel 32 and the drive idler wheel 33, and the conveying surface 10 of the single-sided toothed synchronous belt II 31 is U-shaped. The left rotary conveyor 3 and the right rotary conveyor 8 also include a rotary gear 34 pivotally mounted on the frame 1. The rotary gear 34 meshes with the tooth surface of the single-sided toothed synchronous belt II 31. A rotary motor 36 is also fixedly mounted on the frame 1, and the motor shaft of the rotary motor 36 is connected to the rotary gear 34.

[0035] In the above, the workstation conveyor line 2, the accelerating conveyor line 9, the left rotary line 3 and the right rotary line 8 are all driven by corresponding conveyor motors 26 or rotary motors 36. This utilizes their high efficiency, energy saving, fast response, wide speed range and easy control characteristics to greatly improve accuracy.

[0036] In this invention, the conveying surfaces 10 of all single-sided toothed synchronous belts II31 and I21 are combined to form a circulating, approximately elliptical conveying surface. A guide rail 4 is fitted around the outer side of the conveying surface 10, and a carrier 5 for supporting the workpiece is slidably mounted on the guide rail 4. A vertically movable toothed plate 51 is provided at the bottom of the carrier 5. The teeth 52 of the toothed plate 51 mesh with the tooth surfaces of the single-sided toothed synchronous belts I21 and II31, and the distance between the outermost teeth 52 is less than the distance between the single-sided toothed synchronous belts I21 and II31. As described above, the toothed plate 51 meshes with the single-sided toothed synchronous belts I21 and II31 through toothed engagement, ensuring precise overall transmission of the device, preventing slippage or jumping during transmission, avoiding impact and vibration, and ensuring smooth operation. In addition, direct meshing transmission reduces friction in intermediate links, has a significantly higher energy conversion efficiency than belt or chain transmission, and can withstand high loads, making it widely applicable.

[0037] In this utility model, the frame 1 is also provided with a positioning component. The positioning component can drive all the toothed plates 51 to move upward synchronously, separating them from the single-sided toothed synchronous belt I21 and the single-sided toothed synchronous belt II31. That is, the toothed plates 51 can be driven to move up and down a small distance under the action of the positioning component, thereby separating the toothed plates from the single-sided toothed synchronous belt and achieving precise positioning of the carrier, so as to facilitate processing at the loading station, processing station and unloading station. Specifically, the carrier 5 has a vertically arranged support plate 53. The top of the support plate 53 is fixed with a mounting plate 54 for mounting the workpiece, and the bottom of the support plate 53 is fixed with the toothed plates 51. The support plate 53 is pivotally provided with an upper guide wheel 55 and a lower guide wheel 56, which are arranged vertically. Guide grooves are opened on both sides of the guide rail 4. The upper guide wheel 55 and the lower guide wheel 56 are both placed in the guide grooves, and the outer circumferential surfaces of the upper guide wheel 55 and the lower guide wheel 56 abut against the guide rail 4. This invention's conveying method solves the problem of needing to control the motor to start and stop multiple times during workpiece processing by controlling the rapid separation of the toothed plate and the single-sided toothed synchronous belt, effectively improving the motor's lifespan. Furthermore, the upper guide wheel 55 and lower guide wheel 56 provide guidance on the support plate 53, improving the smoothness and stability of the carrier 5's movement.

[0038] The positioning assembly includes at least a vertically mounted slide rail 6 fixed to the frame 1. A matching slider 61 is provided on the slide rail 6. A push rod 62 is fixed to the slider 61, and a pivoting wheel 63 is pivotally mounted on the push rod 62. A guide rod 57 is fixed to the toothed plate 51, and a positioning block 58 is fixed to the other end of the guide rod 57. The positioning block 58 extends into a groove 64 formed on the support plate 53. A spring 59 is fitted onto the guide rod 57, with one end abutting against the toothed plate 51 and the other end abutting against the positioning block 58. The pivoting wheel 63 abuts against the positioning block 58. The cooperation between the slider 61 and the slide rail 6 improves the stability of the push rod 62's movement and ensures accuracy.

[0039] A guide block 65 is fixedly mounted on the frame 1. A guide rail 66, which is adapted to the guide block 65, slides on the guide block 65. A fixing block 67 is fixedly mounted on the guide rail 66. A connecting rod 68 is pivotally mounted on the fixing block 67. The other end of the connecting rod 68 is pivotally mounted on the slider 61. The use of the connecting rod 68 for driving improves the precise displacement control of the device, achieves overall lightweight design, and helps reduce the size and weight of the device. At the same time, it can withstand long-term high-load operation, reduce the frequency of downtime maintenance due to wear, and greatly extend the service life.

[0040] Furthermore, a bracket 7 is fixed on the frame 1, a drive cylinder 71 is fixed on the bracket 7, a drive block 72 is fixed on the cylinder shaft of the drive cylinder 71, and the drive block 72 is fixed on the guide rail 66.

[0041] The working process of this utility model is briefly described below, including the following steps:

[0042] S1. The conveyor motor 26 located on the workstation conveyor line 2 controls the single-sided toothed synchronous belt I21, which is wound around the conveyor idler wheel 22, to rotate at a constant speed through the conveyor gear 23. When the workpiece located on the carrier 5 moves to the processing station on the single-sided toothed synchronous belt 21, the carrier 5 located on the right rotary line 8 is located at the unloading station on one side, and the carrier 5 located on the left rotary line 3 is located at the loading station on one side.

[0043] S2. Drive cylinder 71 starts, driving guide rail 66 to move via its cylinder shaft. Fixed block 67, fixed on guide rail 66, drives slider 61 to move on guide rail 6 via connecting rod 68. Slider 61 moves upward, driving push wheel 63 to move in slide groove 64 via push rod 62, until drive positioning block 58 drives toothed plate 51 to move upward via guide rod 57. The teeth 52 of toothed plate 51 separate from the tooth surfaces of single-sided toothed synchronous belt I21 and single-sided toothed synchronous belt II31. Then the loading station, processing station and unloading station load, process and unload the workpiece.

[0044] S3. After the loading, processing and unloading are completed, the drive cylinder 71 is reset, and the toothed plate 51 moves downward under the action of the spring 59 until the teeth 52 of the toothed plate 51 mesh with the tooth surfaces of the single-sided toothed synchronous belt I21 and the single-sided toothed synchronous belt II31. The single-sided toothed synchronous belt I21 located on the station conveyor line 2 continues to transport the carrier 5 to the next station.

[0045] S4. During the process of conveying to the next work station, the rotary motor 36 on the right rotary line 8 increases its speed. At the same time, when the sensor detects that the single-sided toothed synchronous belt II31 on the left rotary line 3 conveys the carrier 5 on it to the single-sided toothed synchronous belt I21 on the work station conveyor line 2, the rotary motor 36 on the left rotary line 3 also increases its speed until the speed of the single-sided toothed synchronous belt II31 is the same as the speed of the single-sided toothed synchronous belt I21 on the acceleration conveyor line 9.

[0046] S5. After the carrier 5 located on the right rotary conveyor 8 is conveyed to the single-sided toothed synchronous belt I21 of the accelerating conveyor 9, the rotary motor 36 located on the right rotary conveyor 8 reduces its speed until the speed of the single-sided toothed synchronous belt II31 located on the right rotary conveyor 8 is the same as the speed of the single-sided toothed synchronous belt I21 located on the station conveyor 2, until the station conveyor 2 conveys the carrier on it to the right rotary conveyor 8; at the same time, when the sensor detects that the single-sided toothed synchronous belt II31 located on the left rotary conveyor 3 has received the carrier 5 conveyed by the accelerating conveyor 9, the rotary motor 36 located on the left rotary conveyor 3 reduces its speed until the speed of the single-sided toothed synchronous belt II31 located on the left rotary conveyor 3 is the same as the speed of the single-sided toothed synchronous belt I21 located on the station conveyor 2, and conveys the carrier 5 to the loading station. At this time, the carrier 5 located on the station conveyor 2 is just conveyed to the next station.

[0047] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0048] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A high-speed circulating conveyor device integrating speed change and positioning functions, comprising a frame (1), characterized in that: The frame (1) is provided with a vertically separated and centrally symmetrical workstation conveyor line (2) and an acceleration conveyor line (9). The workstation conveyor line (2) is provided with a carrier (5) corresponding to the processing station located on one side of it for carrying the workpiece. The two ends of the workstation conveyor line (2) and the acceleration conveyor line (9) are respectively provided with a left rotary line (3) and a right rotary line (8). The left rotary line (3) and the right rotary line (8) are respectively provided with the carrier (5) corresponding to the loading station and the unloading station. The station conveyor line (2) and the acceleration conveyor line (9) both have a self-rotating single-sided toothed synchronous belt I (21), and the left rotary line (3) and the right rotary line (8) both have a self-rotating single-sided toothed synchronous belt II (31). The conveying surfaces (10) of all the single-sided toothed synchronous belts II (31) and I (21) form a circulating elliptical conveying surface. The outer side of the conveying surface (10) is fitted with a guide rail (4), and the carrier (5) is slidably mounted on the guide rail (4). The bottom of the carrier (5) is provided with a vertically movable toothed plate (51). The teeth (52) of the toothed plate (51) mesh with the tooth surfaces of the single-sided toothed synchronous belt I (21) and the single-sided toothed synchronous belt II (31), and the distance between the outermost teeth (52) is less than the distance between the single-sided toothed synchronous belt I (21) and the single-sided toothed synchronous belt II (31). The frame (1) is also provided with a positioning component, which can drive all the toothed plates (51) to move upward synchronously and separate from the single-sided toothed synchronous belt I (21) and the single-sided toothed synchronous belt II (31).

2. The high-speed circulating conveying device integrating speed change and positioning functions according to claim 1, characterized in that: Both the station conveyor line (2) and the acceleration conveyor line (9) include at least one set of conveying idler wheels (22) pivotally mounted on the frame (1). The non-tooth surface of the single-sided toothed synchronous belt I (21) is wound around the conveying idler wheel (22), and the conveying surface (10) of the single-sided toothed synchronous belt I (21) is horizontal.

3. The high-speed circulating conveying device integrating speed change and positioning functions according to claim 2, characterized in that: The workstation conveyor line (2) and the acceleration conveyor line (9) also include a conveyor gear (23) pivotally mounted on the frame (1). The conveyor gear (23) meshes with the tooth surface of the single-sided toothed synchronous belt I (21). The frame (1) is also fixed with a conveyor motor (26), and the motor shaft of the conveyor motor (26) is connected to any of the conveyor gears (23).

4. The high-speed circulating conveying device integrating speed change and positioning functions according to claim 1, characterized in that: Both the left rotary line (3) and the right rotary line (8) include at least a pivotally mounted drive wheel (32), and a drive idler wheel (33) is provided on one side of the drive wheel (32). The non-tooth surface of the single-sided toothed synchronous belt II (31) is wound around the drive wheel (32) and the drive idler wheel (33), and the conveying surface (10) of the single-sided toothed synchronous belt II (31) is U-shaped.

5. The high-speed circulating conveying device integrating speed change and positioning functions according to claim 4, characterized in that: The left rotary line (3) and the right rotary line (8) also include a rotary gear (34) pivotally mounted on the frame (1), the rotary gear (34) meshing with the tooth surface of the single-sided toothed synchronous belt II (31), and a rotary motor (36) is also fixed on the frame (1), the motor shaft of the rotary motor (36) being connected to the rotary gear (34).

6. The high-speed circulating conveying device integrating speed change and positioning functions according to claim 1, characterized in that: The carrier (5) has a vertically arranged support plate (53), and a mounting plate (54) for mounting the workpiece is fixed on the top of the support plate (53). The toothed plate (51) is fixed on the bottom of the support plate (53). The support plate (53) is pivotally provided with an upper guide wheel (55) and a lower guide wheel (56) that are arranged vertically. Guide grooves are provided on both sides of the guide rail (4). The upper guide wheel (55) and the lower guide wheel (56) are both placed in the guide grooves, and the outer circumferential surfaces of the upper guide wheel (55) and the lower guide wheel (56) abut against the guide rail (4).

7. The high-speed circulating conveying device integrating speed change and positioning functions according to claim 6, characterized in that: The positioning assembly includes at least a slide rail (6) fixed on the frame (1) and vertically arranged, a slider (61) adapted to it is provided on the slide rail (6), a push rod (62) is fixed on the slider (61), and a push wheel (63) is pivotally provided on the push rod (62); a guide rod (57) is fixed on the toothed plate (51), and a positioning block (58) is fixed at the other end of the guide rod (57), the positioning block (58) extends into the slide groove (64) opened on the support plate (53); a spring (59) is sleeved on the guide rod (57), one end of the spring (59) abuts against the toothed plate (51), the other end abuts against the positioning block (58), and the push wheel (63) can abut against the positioning block (58).

8. The high-speed circulating conveying device integrating speed change and positioning functions according to claim 7, characterized in that: A guide block (65) is fixed on the frame (1), and a guide rail (66) adapted to it is slidably provided on the guide block (65). A fixing block (67) is fixed on the guide rail (66), and a connecting rod (68) is pivotally provided on the fixing block (67). The other end of the connecting rod (68) is pivotally provided on the slider (61).

9. The high-speed circulating conveying device integrating speed change and positioning functions according to claim 8, characterized in that: A bracket (7) is fixed on the frame (1), a drive cylinder (71) is fixed on the bracket (7), a drive block (72) is fixed on the cylinder shaft of the drive cylinder (71), and the drive block (72) is fixed on the guide rail (66).

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