Double-line long-distance conveying device

Abstract

The invention discloses a double-line long-distance conveying device which comprises two annular chain belts arranged side by side, and the driving ends of the two annular chain belts share one driving shaft and are driven by the same motor speed reducer. The driven ends of the two annular chain belts share one driven shaft, and the two chain belts are the same in perimeter and section number and bear the same load. The driven shaft is matched with a driven damping mechanism which enables the driven shaft to rotate at a constant speed, the driven damping mechanism comprises a damping gear pump, a driven shaft damping chain wheel is installed at the shaft end of one side of the driven shaft, and the driven shaft damping chain wheel is connected with a driving shaft of the damping gear pump through a damping transmission chain. The driven shaft damping chain wheel can also be connected with a low-speed input end of an accelerator through a damping transmission chain, and a high-speed output end of the accelerator is connected with a driving shaft of the damping gear pump. The device can ensure that the two parallel long chain belts are consistent in bearing load and abrasion, and keep advancing at a constant speed on a production line, so that periodic vibration is avoided.

Description

Technical Field

[0001] The invention relates to a long-distance conveying device, in particular to a double-lane long-distance conveying device, and belongs to the technical field of conveying equipment. Background Art

[0002] The length of the rain detection line in the automobile assembly plant is 100 to 200 meters. It now adopts a structure driven by two parallel narrow plate chains. The long narrow plate chains constitute the chain belt conveyor line that carries the automobile. The wheels on both sides of the automobile are located on the chain belt on the same side. The gap between the two chain belts is conducive to the discharge of water.

[0003] One of the existing driving methods of double-lane conveyor is that the active ends of the two chain belt conveyor lines share a driving shaft and are driven by the same motor reducer. Since the circumference of the chain belt can reach hundreds of meters, the two side-by-side chain belts are basically the same in length during installation, and the number of chain links is not completely consistent. Usually, a passive shaft is set at the passive end of each of the two chain belt conveyor lines to adapt to the length and chain link errors of the two chain belts. The two passive shafts are driven by their own damping motors, and the two damping motors control the damping of one chain belt respectively, and ensure the tension of the chain, i.e., the chain belt, during operation through the differential speed with the active shaft.

[0004] The second existing driving method is that the active ends of the two chain belt conveyor lines share a driving shaft and are driven by the same motor reducer. The passive ends of the two chain belt conveyor lines are each provided with a driven shaft, and the driven shaft is not provided with a damping motor.

[0005] As the production pace of automobile manufacturers accelerates, the conveying distance of the chain belt conveyor line for automobile assembly is getting longer and longer. Electric vehicles, which have been increasing in production, have the feature of automatic braking when they stop. When an electric vehicle stops on the chain belt conveyor line, the four wheels are in a brake state and can no longer roll relative to each other, forming a rigid structure similar to the whole, pressing on the two chain belts so that the two chain belts can only move forward synchronously. In addition, the weight of the car increases, resulting in the phenomenon that the chain belt conveyor line is often broken after running for a period of time.

[0006] The important reason for the breakage is that the two chain belts have different elongation and wear. The longer the chain links, the larger the pitch and the faster the linear speed, dragging the other slower chain belt forward, making the chain belt with longer chain links bear a greater load. The wear difference between the two chain belts becomes larger and the pitch difference becomes relatively larger.

[0007] The chain belt with a relatively small pitch moves forward at a slow linear speed, and is dragged by the other chain belt, which makes it less worn and has a smaller load. This causes the pitch difference between the two chain belts to become larger and larger, and the load is concentrated on one of the chain belts, causing the chain conveyor line to break.

[0008] In addition, when the chain conveyor line carries cars or other loads and moves forward at a low speed, the heavy load makes the friction between the chain and the track larger. In addition, the chain is very long and the plastic chain links are very elastic, which makes the chain conveyor line vibrate periodically. That is, when the driving shaft rotates at a constant speed, the upper layer of the chain carrying the load cannot maintain a constant linear speed. The overall performance is that it moves forward at normal speed for a distance, that is, there is a deceleration hysteresis phenomenon, and then it returns to normal speed, and then there is a deceleration hysteresis phenomenon, and so on. The passive end of the chain is more serious.

[0009] As mentioned above, the current solution is to install a damping motor at the passive end, and the output end of the damping motor is connected to the passive shaft through the motor reducer and the passive end roller chain. The movement speed of the damping motor is slightly lower than the motor reducer, so that the conveyor belt runs faster than the passive sprocket of the conveyor line, forming a state where the chain belt drags the sprocket. The current situation is that the periodic vibration of the passive end chain belt causes the speed of the passive wheel to fluctuate. When the speed is fast, it drags the damping motor forward; when the speed is slow, the damping motor drags the chain belt forward, and this cycle repeats.

[0010] Because there is a tight gap in the passive end roller chain and a transmission gap in the motor reducer, the damping motor generates different torque directions on the chain belt between dragging and being dragged. Summary of the invention

[0011] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification of this application and the title of the invention, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0012] In view of the above problems and / or the problems existing in the prior art, the present invention is proposed.

[0013] The purpose of the present invention is to overcome the problems existing in the prior art and provide a double-lane long-distance conveying device that can ensure that the two parallel long chain belts bear consistent loads and wear, and maintain a uniform speed on the production line to avoid periodic vibration.

[0014] In order to solve the above technical problems, the present invention provides a double-lane long-distance conveying device, comprising two annular chain belts arranged side by side, the active ends of the two annular chain belts share a driving shaft and are driven by the same motor reducer; the passive ends of the two annular chain belts share a passive shaft, the circumference and number of sections of the two chain belts are the same and they bear the same load.

[0015] As an improvement of the present invention, the passive shaft is equipped with a passive damping mechanism to keep it rotating at a uniform speed. The passive damping mechanism includes a damping gear pump. A passive shaft damping sprocket is installed on one side of the shaft end of the passive shaft. The passive shaft damping sprocket is connected to the driving shaft of the damping gear pump through a damping transmission chain.

[0016] As a further improvement of the present invention, the passive damping mechanism also includes an accelerator, the passive shaft damping sprocket is connected to the low-speed input end of the accelerator through a damping transmission chain, and the high-speed output end of the accelerator is connected to the driving shaft of the damping gear pump.

[0017] As a further improvement of the present invention, the inlet oil circuit of the damping gear pump is connected to the outlet of the oil tank, and the outlet oil circuit of the damping gear pump is installed with a constant flow valve for maintaining a constant oil flow rate. The constant flow valve keeps the rotation speed of the damping gear pump constant, and the outlet of the constant flow valve is connected to the return port of the oil tank through a return oil circuit.

[0018] As a further improvement of the present invention, the outlet oil circuit of the damping gear pump is further installed with a relief valve, and the relief valve is connected in series with the constant flow valve.

[0019] As a further improvement of the present invention, the outlet of the damping gear pump is connected to the inlet of the oil separation valve seat, the outlet of the oil separation valve seat is connected to the inlet of the overflow valve and the inlet of the constant flow valve, and the outlets of the constant flow valve and the overflow valve are respectively connected to the return oil circuit.

[0020] As another improvement of the present invention, in the annular chain belt, a loading plane is provided on the top of each chain link, and a plurality of straight ribs parallel to the forward direction of the chain link are provided on the back of the loading plane, and both ends of each straight rib extend from the front and rear ends of the loading plane respectively, and the front end of each straight rib forms a front hinged ear, and the rear end of each straight rib forms a rear hinged ear; the meshing parts of each front hinged ear meshing with the sprocket are respectively provided with meshing inclined surfaces.

[0021] As another improvement of the present invention, the annular chain belt can transmit in both directions, a loading plane is provided on the top of each chain link, and a plurality of straight ribs parallel to the forward direction of the chain link are provided on the back of each loading plane, and both ends of each straight rib extend from the front and rear ends of the loading plane respectively, and the front end of each straight rib forms a front hinged ear, and the rear end of each straight rib forms a rear hinged ear; the front hinged ear and the rear hinged ear are staggered in the width direction of the annular chain belt and parallel to the traction force direction of the chain link; the front end head of the front hinged ear and the rear end head of the rear hinged ear are respectively provided with a circular head, and the meshing ends of each front hinged ear and the rear hinged ear are respectively provided with a meshing inclined surface.

[0022] Compared with the prior art, the present invention has achieved the following beneficial effects: 1. Even if there is a slight difference in the tensioning force of the two chain belts at the initial stage of operation, during the long-term working process after the running-in period, it can be ensured that the two chain belts bear the same load and are subject to the same wear, and are not prone to tooth jumping or being pulled apart, thereby extending the service life and ensuring the long-term stable operation of the production line.

[0023] 2. When the chain belt has a long transmission distance and bears a large load, the passive end damping is used to keep the passive shaft rotating at a constant speed, so that the two chain belts can keep moving at the same linear speed.

[0024] 3. By setting straight ribs or herringbone keel ribs on the back of each chain link, the traction force on the straight ribs or herringbone keel ribs is located in a plane, and the plane is parallel to the load plane, so it is not easy to be pulled apart; and the parts meshing with the sprocket are respectively provided with meshing inclined surfaces to improve the load-bearing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. The drawings are only provided for reference and explanation, not for limiting the present invention. Among them: Figure 1 It is a front view of the double-lane long-distance conveying device of the present invention; Figure 2 for Figure 1 A top view of Figure 3 is a three-dimensional diagram of the passive damping mechanism of the present invention; Figure 4 is a three-dimensional diagram of the first chain belt in the present invention; Figure 5 A top view of the first chain belt of the present invention; Figure 6 A bottom view of the first chain belt of the present invention; Figure 7 It is a side view of the first chain belt in the present invention; Figure 8 is a three-dimensional diagram of the second chain belt in the present invention; Fig. 9 is a top view of the second chain belt of the present invention; Fig.10 A bottom view of the second chain belt of the present invention; Fig.11 is a side view of the second chain belt of the present invention; In the figure: 1. Motor reducer; 2. Driving shaft; 3. Driving sprocket of conveyor line; 4. Chain belt; 5. Passive sprocket of conveyor line; 6. Passive shaft; 7. Damping sprocket of passive shaft; 8. Damping transmission chain; 9. Accelerator; 10. Damping gear pump; 11. Oil distribution valve seat; 12. Constant flow valve; 13. Overflow valve; 14. Oil tank; 15. Straight chain; 15a. Carrying plane; 15b. Straight rib; 15c. Front hinge ear; 15d. Rear hinge ear; 15e. Engaging slope. DETAILED DESCRIPTION

[0026] In the following description of the present invention, the directions or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not mean that the device must have a specific direction.

[0027] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below in conjunction with specific diagrams. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0029] like Figures 1 to 3 As shown, the double-track long-distance conveying device of the present invention comprises a motor reducer 1, a driving shaft 2, a conveyor line driving sprocket 3, a chain belt 4, a conveyor line passive sprocket 5 and a passive shaft 6. Two chain belts 4 are arranged side by side and spaced a certain distance apart from each other. The two chain belts 4 are respectively attached to their own tracks and move forward. When used in an automobile production line, the two left wheels of the automobile are located on one chain belt 4, and the two right wheels of the automobile are located on another chain belt 4.

[0030] In order to achieve the synchronization of the transmission of the two long chain belts 4 and the consistency of the load and wear, the following technical solutions are adopted: The active ends of the two chain belt conveyor lines share a driving shaft 2, which is driven by the same motor reducer 1. The driving shaft 2 is equipped with a conveyor line driving sprocket 3. The passive ends of the two chain belt conveyor lines share a passive shaft 6, and the conveyor line passive sprocket 5 is installed on the passive shaft 6. The chain belt 4 is formed by hingedly connecting multiple chain links in sequence and wrapped between the conveyor line driving sprocket 3 and the conveyor line passive sprocket 5 to form a conveyor line. The center distance between the driving shaft 2 and the passive shaft 6 can reach 200 meters.

[0031] The chain links of the two chain belt conveyor lines are distinguished by marking colors during installation, for example, black chain links and colored chain links are used alternately; the colors of the chain links on the same cross section are kept consistent to facilitate observation that the chain links of the two chain belt conveyor lines are in an aligned state, and to ensure that the number of links of the two chain belts 4 between the driving sprocket 3 of the conveyor line and the passive sprocket 5 of the conveyor line are exactly equal.

[0032] Because the number of chain links of the two chain belts 4 wrapped around the conveyor line driving sprocket 3 and the conveyor line passive sprocket 5 is exactly the same, the manufacturing accuracy and elasticity of the chain plate ensure that the upper layer of the chain belt carrying the car can be synchronously kept in a taut state when the two chain belt conveyor lines are working.

[0033] The corresponding links of the two chain belts 4 leave the passive sprocket 5 of the conveyor line at the same time, and the corresponding links arrive at the active sprocket 3 of the conveyor line at the same time. In the initial operation, if there is a slight difference in the tension of the two chain belts 4, the one with a relatively large tension will be slightly ahead of schedule, and the one with a relatively small tension will be slightly behind schedule. The chain belt that is ahead of schedule is subjected to greater force, resulting in slightly greater wear. After wear, the tension gradually converges with that of the other chain belt. In the long-term operation after the running-in period, it can be ensured that the two chain belts bear the same load and are subject to the same wear.

[0034] In order to enable the two long chain belts to maintain a uniform linear speed during operation, the following technical solutions are adopted: A driven shaft damping sprocket 7 is installed at one end of the driven shaft 6. The driven shaft damping sprocket 7 drives the low-speed input end of the accelerator 9 to rotate through the damping transmission chain 8, and the high-speed output end of the accelerator 9 drives the damping gear pump 10 to operate.

[0035] The inlet oil circuit of the damping gear pump 10 is connected to the outlet of the oil tank 14. The outlet oil circuit of the damping gear pump 10 is installed with a constant flow valve 12 for maintaining a constant oil flow rate. The constant flow valve 12 keeps the speed of the damping gear pump 10 constant, and the outlet of the constant flow valve 12 is connected to the return port of the oil tank 14 through the return oil circuit.

[0036] The outlet oil circuit of the damping gear pump 10 is also equipped with a relief valve 13, and the relief valve 13 has two installation modes: one is to be connected in series with the constant flow valve 12. The other is to be connected in parallel with the constant flow valve 12. The specific connection mode is: the outlet of the damping gear pump 10 is connected to the inlet of the oil separation valve seat 11, the outlet of the oil separation valve seat 11 is connected to the inlet of the relief valve 13 and the inlet of the constant flow valve 12, and the outlets of the constant flow valve 12 and the relief valve 13 are respectively connected to the oil return circuit.

[0037] The outlet oil circuit of the damping gear pump 10 is installed with a relief valve 13 to ensure safety. The relief valve 13 does not work normally, but opens to release pressure when the system pressure exceeds the set pressure.

[0038] When the damping gear pump 10 is working, the constant flow valve 12 is used to keep the oil output of the damping gear pump 10 constant, so that the rotation speed of the damping gear pump 10 is kept constant, and indirectly the rotation speed of the driven shaft damping sprocket 7 and the driven shaft 6 is kept constant.

[0039] The driving shaft 2 rotates at a constant speed under the drive of the motor reducer 1. Because the damping gear pump 10 is driven by the passive shaft 6 through the accelerator 9, the constant speed of the damping gear pump 10 will make the speed of the passive shaft 6 constant, playing a role in load balancing. In this way, although the center distance between the driving shaft 2 and the passive shaft 6 can reach 200 meters, making the circumference of the chain belt particularly long, when the driving shaft 2 and the passive shaft 6 rotate at a constant speed, the chain belt can maintain a uniform linear speed.

[0040] According to the load size and required forward speed of the chain belt, a damping gear pump 10 with suitable flow rate and a matching accelerator 9 are selected. The passive shaft damping sprocket 7 can also directly drive the damping gear pump 10 to operate through the damping transmission chain 8, and a larger damping gear pump is used.

[0041] The chain links of the chain belt have the following structural forms:

[0042] like Figures 4 to 7 As shown, each chain link is a straight chain 15, the length direction of each chain link is parallel to the forward direction after forming the chain belt, the width direction of each chain link is perpendicular to the forward direction after forming the chain belt, and the top of each chain link is provided with a load-bearing plane 15a for carrying objects. The width direction dimension of each chain link is several times the length direction dimension, that is, the width of each chain link is much larger than the pitch. The smaller pitch facilitates flexible turning at the gears at both ends, and the wider width makes the top load-bearing area larger. Two or more chain links can also be arranged side by side in the width direction of the chain belt to form a wider load-bearing surface.

[0043] The back of each chain link is provided with a plurality of straight ribs 15b parallel to the advancing direction of the chain link, and the two ends of each straight rib 15b extend from the front and rear ends of the loading plane 15a respectively, the front end of each straight rib 15b forms a front hinge ear 15c, and the rear end of each straight rib 15b forms a rear hinge ear 15d.

[0044] The front hinged ear 15c and the rear hinged ear 15d are coaxial and parallel to the traction force direction of the chain link, so they are not easily broken, which is beneficial to the stable production of the production line.

[0045] The front end of the front hinged ear 15c and the rear end of the rear hinged ear 15d are respectively provided with a circular head, and are respectively provided with a hinge hole for the chain pin to pass through. The chain link is an axisymmetric structure in the pitch direction, the front hinged ear 15c of the rear chain link is embedded in the groove between the two rear hinged ears 15d of the front chain link, and the chain pin passes through the hinge holes of the front hinged ear 15c and the rear hinged ear 15d in sequence so that each chain link is hinged in sequence to form a chain belt. The chain belt of this structural form is suitable for automobile assembly or testing production lines.

[0046] The meshing parts of the front hinged ears 15c meshing with the sprocket are respectively provided with meshing inclined surfaces 15e, and the angles of the meshing inclined surfaces 15e match different angles according to the number of teeth of the sprocket. The meshing inclined surfaces 15e on the hinged ears mesh with the sprocket and are not easy to jump teeth, or crack and break, and have greater load capacity.

[0047] like Figures 8 to 11 As shown, each link is a straight chain 15, and a loading plane 15a for loading objects is provided on the top of each link. A plurality of straight ribs 15b parallel to the advancing direction of the link are provided on the back of each link, and the two ends of each straight rib 15b extend from the front and rear ends of the loading plane 15a respectively, and the front end of each straight rib 15b forms a front hinge ear 15c, and the rear end of each straight rib 15b forms a rear hinge ear 15d.

[0048] The front hinged ears 15c and the rear hinged ears 15d are arranged alternately and parallel to the traction force direction of the chain link, so they are not easily broken, which is conducive to the stable production of the production line.

[0049] The front end of the front hinged ear 15c and the rear end of the rear hinged ear 15d are respectively provided with a round head, and are respectively provided with a hinge hole for the chain pin 16f to pass through. The front hinged ear 15c is embedded in the groove between the two adjacent rear hinged ears 15d of the previous link, and the chain pin 16f passes through the hinge holes of the front hinged ear 15c and the rear hinged ear 15d in sequence, so that each link is hinged in sequence to form a chain belt.

[0050] The meshing ends of the front hinged ears 15c and the rear hinged ears 15d are respectively provided with meshing inclined surfaces 15e to improve the load capacity. The chain belt of this structural form is suitable for corrugated paper production lines and is convenient for bidirectional transmission.

[0051] The above is only a preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention, but does not limit the scope of patent protection of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. In addition to the above embodiments, the present invention may have other implementation modes without departing from the spirit and scope of the present invention. The present invention may also have various changes and improvements, and all technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection required by the present invention. The scope of protection required by the present invention is defined by the attached claims and their equivalents. The technical features not described in the present invention can be realized by or using existing technologies, which will not be repeated here.

Claims

1. A double-lane long-distance conveying device, comprising two annular chain belts arranged side by side, characterized in that: The active ends of the two endless chain belts share a driving shaft and are driven by the same motor reducer; the passive ends of the two endless chain belts share a passive shaft, and the two chain belts have the same circumference and number of sections and bear the same load.

2. The double-lane long-distance conveying device according to claim 1 is characterized in that: The passive shaft is equipped with a passive damping mechanism to keep it rotating at a constant speed. The passive damping mechanism includes a damping gear pump. A passive shaft damping sprocket is installed on one side of the passive shaft. The passive shaft damping sprocket is connected to the driving shaft of the damping gear pump through a damping transmission chain.

3. The double-lane long-distance conveying device according to claim 2 is characterized in that: The passive damping mechanism also includes an accelerator, the passive shaft damping sprocket is connected to the low-speed input end of the accelerator through a damping transmission chain, and the high-speed output end of the accelerator is connected to the driving shaft of the damping gear pump.

4. The double-lane long-distance conveying device according to claim 3 is characterized in that: The inlet oil circuit of the damping gear pump is connected to the outlet of the oil tank, and the outlet oil circuit of the damping gear pump is installed with a constant flow valve for maintaining a constant oil flow rate. The constant flow valve keeps the speed of the damping gear pump constant, and the outlet of the constant flow valve is connected to the return port of the oil tank through the return oil circuit.

5. The double-lane long-distance conveying device according to claim 4 is characterized in that: The outlet oil circuit of the damping gear pump is also equipped with a relief valve, and the relief valve is connected in series with the constant flow valve.

6. The double-lane long-distance conveying device according to claim 4 is characterized in that: The outlet of the damping gear pump is connected to the inlet of the oil separation valve seat, the outlet of the oil separation valve seat is connected to the inlet of the overflow valve and the inlet of the constant flow valve, and the outlets of the constant flow valve and the overflow valve are respectively connected to the return oil circuit.

7. The double-lane long-distance conveying device according to any one of claims 1 to 6, characterized in that: In the annular chain belt, a loading plane is provided on the top of each link, and a plurality of straight ribs parallel to the forward direction of the link are provided on the back of the loading plane. The two ends of each straight rib extend from the front and rear ends of the loading plane respectively, the front end of each straight rib forms a front hinged ear, and the rear end of each straight rib forms a rear hinged ear; the meshing parts of each front hinged ear meshing with the sprocket are respectively provided with meshing inclined surfaces.

8. The double-lane long-distance conveying device according to any one of claims 1 to 6, characterized in that: The annular chain belt can transmit in both directions, and a loading plane is provided on the top of each chain link, and a plurality of straight ribs parallel to the forward direction of the chain link are provided on the back of each loading plane, and the two ends of each straight rib extend from the front and rear ends of the loading plane respectively, and the front end of each straight rib forms a front hinged ear, and the rear end of each straight rib forms a rear hinged ear; the front hinged ear and the rear hinged ear are staggered in the width direction of the annular chain belt and parallel to the traction force direction of the chain link; the front end head of the front hinged ear and the rear end head of the rear hinged ear are respectively provided with a circular head, and the meshing ends of each front hinged ear and the rear hinged ear are respectively provided with a meshing inclined surface.

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