Conveying trolley series connection structure

Abstract

The utility model relates to the technical field of logistics transportation, and discloses a conveying trolley series connection structure in order to solve the problem that in the prior art, a trolley set is prone to clamping stagnation when turning. Comprising connecting blocks arranged between adjacent trolleys, connecting rods are rotationally arranged between the connecting blocks, fixing grooves are formed in the connecting positions of the connecting rods and the connecting blocks, and the connecting rods and the connecting blocks are fixed by inserting connecting shafts into the fixing grooves. Due to the fact that the two serially-connected trolleys of the connecting rod keep the same front-back distance and synchronously and horizontally run, when the conveying trolleys reach the turning position, the first conveying trolley turns in advance under the action of lateral force in the turning process, and meanwhile the first conveying trolley pulls the rear conveying trolley to sequentially turn under the action of the connecting rod; when the front-end conveying trolley completes turning, the rear-end conveying trolley is prevented from being clamped after turning due to the pushing effect of the connecting rod, and turning smoothness is guaranteed due to the fact that the front-end conveying trolley is not broken through front pulling and rear pushing.

Description

Technical Field

[0001] The utility model relates to the technical field of logistics equipment, in particular to a series connection structure of conveying trolleys. Background Art

[0002] In an automobile welding shop or other production workshops, an accumulation type conveying line equipment is often used to convey workpieces. There are multiple trolleys arranged on the accumulation type conveying line. Usually, each trolley independently completes the conveyance of one workpiece. Due to the limited load-bearing area and load-bearing capacity of a single conveying trolley, some workpieces on site are large in area and high in weight. Therefore, a single conveying trolley cannot meet the requirements of various on-site occasions. Generally, a series connection mechanism of conveying trolleys will be designed, which can connect multiple conveying trolleys in series as a conveying tray, thereby increasing the load-bearing area and load-bearing capacity of the conveying trolley. However, in the traditional series connection mechanism, when turning, the connection between the single trolleys is disconnected by the snap and hook pins, and the single trolleys turn separately. This traditional structure has many drawbacks such as the single trolley getting stuck when turning, which may cause the trolleys to collide with each other.

[0003] As Figure 4 shown, the traditional snap and pin structure consists of a snap device 9 and a hook pin 10. The snap device 9 is connected to the base plate 7 of the first conveying trolley, and the hook pin mechanism 10 is connected to the mounting plate 8 of the second trolley. When the conveying trolley travels in the horizontal direction, the hook pin 10 on the second conveying trolley is connected to the snap device 9 of the first conveying trolley under the action of the conveying force to complete the series connection. When the conveying trolley reaches the turning position, the first conveying trolley disengages from the second conveying trolley under the action of the lateral force during the turning process, so that the two trolleys can turn smoothly. If the previous trolley gets stuck during turning, it will cause the following trolley to turn over, and then the two trolleys will be stuck on the equipment. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a series connection structure of conveying trolleys to solve the problem that the existing technology is prone to jamming when the trolley group turns.

[0005] To achieve the above purpose, the specific technical solution of a series connection structure of conveying trolleys of the utility model is as follows:

[0006] A series connection structure of conveying trolleys includes connection blocks arranged between adjacent trolleys. A connecting rod is rotatably arranged between the connection blocks. Fixing grooves are formed at the connection parts of the connecting rod and the connection blocks. The connecting rod and the connection blocks are fixed by inserting a connecting shaft into the fixing grooves. Through the rotational connection between the connecting rod and the connection blocks, when the conveying trolley runs horizontally, the adjacent conveying trolleys can be kept connected in series to complete the transmission of materials; when the trolley turns, the trolley group can achieve the transportation effect of pulling in front and pushing behind, without disconnection and jamming, and form a smooth cycle.

[0007] Further, the connecting block includes a horizontally arranged rectangular plate and a horizontally arranged U-shaped connection. The connecting rod is fixed at the opening of the U-shaped connection through a connecting shaft. The design of the rectangular plate and the U-shaped connection makes the connecting block have high structural stability. The rectangular plate provides sufficient supporting area, and the U-shaped connection can effectively fix the connecting rod, ensuring its stability during movement, effectively reducing damage caused by vibration or impact, and improving the reliability of the entire conveying system.

[0008] Further, clamping grooves are provided on the connecting shafts at the upper and lower ends of the connecting block, and the clamping grooves are in interference fit with shaft retaining rings.

[0009] Further, a bushing for reducing direct friction is provided between the connecting rod and the connecting shaft. The bushing can effectively reduce the direct contact between the connecting rod and the connecting shaft, thereby significantly reducing the wear of these two parts. This wear reduction effect effectively extends the service life of the component and reduces the frequency of maintenance and replacement. At the same time, the lubrication performance improves the relative movement between the connecting rod and the connecting shaft, making the rotation smoother, thereby improving the operating efficiency of the entire conveying system.

[0010] Further, tetrafluoroethylene grease is provided between the connecting shaft and the bushing. Due to the smooth characteristics of tetrafluoroethylene grease, the friction coefficient between the connecting shaft and the bushing can be significantly reduced. A low-friction environment is formed, and this low-friction environment reduces the wear between components. For the series structure of conveying trolleys that move frequently or bear heavy loads, the service life of the series structure can be effectively extended.

[0011] Further, bolt holes for fixing the transport trolley are provided on both the front and side surfaces of the rectangular plate. By providing bolt holes on the front and side surfaces of the rectangular plate, compared with traditional welding or single-sided bolt fixing, effective supporting force can be provided, the connection firmness between the connecting block and the transport trolley can be enhanced, and at the same time, the quick installation and disassembly between the connecting block and the transport trolley are facilitated.

[0012] A series structure of a conveying trolley provided by the present utility model has the following advantages:

[0013] 1. Strong bearing capacity, capable of connecting multiple conveying trolleys to run, effectively improving the bearing capacity and bearing area of the entire conveying tray.

[0014] 2. The installation process is simple. The series connection can be completed by fixing the connecting block with bolts and fixing the connecting rod with a shaft retaining ring.

[0015] 3. The transportation process is smooth. When the trolley turns, since the connecting rod and the connecting block can rotate through the connecting shaft, "pulling in the front and pushing in the back" can be achieved without disconnection or jamming, and the cycle can be completed smoothly. Description of the Drawings

[0016] Figure 1 The structural diagram of the device provided by the present utility model;

[0017] Figure 2 The three-dimensional view of the conveyor line provided by the present utility model;

[0018] Figure 3 The bottom view of the series structure provided by the present utility model;

[0019] Figure 4 The schematic diagram of the traditional snap and pin structure.

[0020] In the figure: 1. connecting block; 2. connecting rod; 3. connecting shaft; 4. bushing; 5. fixing groove; 6. transport trolley; 7. trolley base plate; 8. mounting plate; 9. snap device; 10. hook pin. Specific embodiments

[0021] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0022] Embodiment 1

[0023] Refer to Figures 1-3 , the present utility model provides a series structure of transport trolleys for logistics transportation occasions. A series structure of transport trolleys includes a connecting block 1 arranged between adjacent trolleys. A connecting rod 2 is rotatably arranged between the connecting blocks 1. A fixing groove 5 is opened at the connecting part of the connecting rod 2 and the connecting block 1. The connecting rod 2 and the connecting block 1 are fixed by inserting a connecting shaft 3 into the fixing groove 5. Snap grooves are arranged at both the upper and lower ends of the connecting shaft 3 of the connecting block 1. The snap grooves are in interference fit with shaft retaining rings. A bushing 4 for reducing direct friction is arranged between the connecting rod 2 and the connecting shaft 3.

[0024] The series mechanism of the transport trolley is composed of two connecting blocks 1 and one connecting rod 2. The two connecting blocks 1 are respectively fixed on the front and rear transport trolleys 6. Align the fixing shaft of the connecting block 1 with the fixing groove 5 of the connecting rod 2, and fix both ends of the connecting rod 2 on the connecting block 1 through the connecting shaft 3. When the connecting shaft 3 is inserted into the fixing grooves 5 of the connecting block 1 and the connecting rod 2, first arrange the bushing 4 in the fixing groove 5 of the connecting rod 2, and then insert the fixing shaft into the fixing grooves 5 of the connecting block 1 and the connecting rod 2. After the connecting block 1 is inserted into the fixing groove 5, the shaft retaining rings are in interference fit in the snap grooves at the upper and lower ends of the connecting shaft 3. At this time, the fixing of the connecting block 1 and the connecting rod 2 is completed, and the setting of the series structure of the transport trolley 6 is completed.

[0025] The connecting rod 2 is connected to the connecting rod blocks of the front and rear conveying trolleys. When the conveying trolleys travel in the horizontal direction, due to the connection of the connecting rod 2, the two trolleys maintain the same spacing front and rear and run synchronously horizontally. When the conveying trolley reaches the turning position, the first conveying trolley turns first under the action of the lateral force during the turning process, and at the same time, under the action of the connecting rod 2, it pulls the rear conveying trolley to turn in sequence. When the front-end conveying trolley completes the turning, the rear conveying trolley is prevented from jamming after the turning due to the pushing action of the connecting rod 2. The smoothness of the turning is ensured by the continuous connection of pulling in the front and pushing in the rear.

[0026] Refer to Figure 4 For the traditional snap-fastener and pin structure, when the conveying trolley reaches the turning position, the first conveying trolley disengages from the second conveying trolley under the action of the lateral force during the turning process, so that the two trolleys can turn smoothly. If the front trolley jams during the turning, it will cause the rear trolley to turn over, and then the two trolleys will be stuck on the equipment. Setting the connecting rod structure of the present application can perfectly avoid this risk; due to the simple structure of the connecting rod mechanism of the present device, it has the advantage of convenient maintenance.

[0027] Preferably, the connecting block 1 includes a horizontally arranged rectangular plate and a horizontally arranged U-shaped connection. The connecting rod 2 is fixed at the opening of the U-shaped connection through a connecting shaft 3. Bolt holes for fixing the transport trolley 6 are provided on both the front and side surfaces of the rectangular plate.

[0028] When the connecting block 1 fixes the front and rear transport trolleys 6, since bolt holes for fixing the transport trolley 6 are provided on both the front and side surfaces of the connecting block 1, and are fixed respectively from the front and side by bolts, the connecting block 1 and the connecting rod 2 are reliably fixed. When the connecting block 1 is respectively fixed on the front and rear transport trolleys 6, at this time, since the U-shaped connection is horizontally arranged, the connecting rod 2 can be placed through the opening of the U-shaped connection. The bushing 4 is arranged in the fixing groove 5 of the connecting rod 2. At this time, the fixing groove 5 of the connecting rod 2 is aligned with the fixing groove 5 of the U-shaped connection, and then fixed through the connecting shaft 3 to complete the series connection of the transport trolleys 6.

[0029] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tandem structure of conveying trolleys, characterized in that: The invention comprises a connecting block (1) arranged between adjacent trolleys, a connecting rod (2) being rotatably arranged between the connecting blocks (1), a fixing groove (5) being provided at the connecting portion between the connecting rod (2) and the connecting block (1), and the connecting rod (2) and the connecting block (1) being inserted into the fixing groove (5) and fixed via a connecting shaft (3).

2. The tandem structure of the conveying trolleys according to claim 1 is characterized in that: The connection block (1) comprises a horizontally arranged rectangular plate and a horizontally arranged U-shaped connection, and the connection rod (2) is fixed at the opening of the U-shaped connection via a connection shaft (3).

3. The tandem structure of the conveying trolleys according to claim 1 is characterized in that: The connecting shafts (3) at the upper and lower ends of the connecting block (1) are both provided with clamping grooves, and the clamping grooves are interference-fitted with the shaft clamping springs.

4. The tandem structure of the conveying trolleys according to claim 3 is characterized in that: A bushing (4) for reducing direct friction is provided between the connecting rod (2) and the connecting shaft (3).

5. The tandem structure of the transport trolleys according to claim 4 is characterized in that: Tetrafluoroethylene grease is provided between the connecting shaft (3) and the bushing (4).

6. The tandem structure of the conveying trolleys according to claim 2 is characterized in that: The front and side surfaces of the rectangular plate are both provided with bolt holes for fixing the transport trolley (6).

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