Driving mechanism for cross chain conveying system

Abstract

The utility model discloses a driving mechanism for a cross chain conveying system, which comprises a motor, a transmission component and a control component, and an output chain wheel is mounted on an output shaft of the motor; the transmission assembly is installed on the rack and used for transmitting power of the output chain wheel to the driving chain wheel. The control assembly comprises a controller and a detection module which is in signal connection with the controller and used for detecting whether the driving chain wheel rotates or not and rotating speed changes, and the controller is configured to be used for controlling the motor to stop based on a detection signal of the detection module when the driving chain wheel stops rotating or the rotating speed of the driving chain wheel is reduced. Due to the fact that the transmission assembly is adopted between the output chain wheel and the driving chain wheel of the motor to indirectly transmit power, when the conveying chain is blocked, only the transmission assembly needs to be disassembled, power transmission between the output chain wheel and the driving chain wheel needs to be disconnected, and operation is simpler and more convenient. In addition, when the conveying chain is blocked, the motor can be controlled to stop in time through the control assembly, and safety and reliability are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of chain conveying equipment, and particularly relates to a driving mechanism for a cross-chain conveying system. Background Art

[0002] As Figure 1 shown, the cross-chain conveying system of the prior art generally includes a chain track 104', a chain drive structure, and a motor 1'. The chain drive structure generally includes a driving sprocket 102', a driven sprocket, and a conveying chain 105'. The motor 1' is directly connected to the driving sprocket 102' through a coupling 4'. The conveying chain 105' is connected between the driving sprocket 102' and the driven sprocket. Driven by the motor 1', the conveying chain 105' moves in a cyclic manner and drives a workpiece or an accumulation trolley 107' to move. The design of directly connecting the motor 1' to the driving sprocket 102' means that the rotation of the motor shaft is directly transmitted to the driving sprocket 102', thereby driving the conveying chain 105'. However, when the conveying chain 105' gets stuck and slows down or jams and stops moving, the direct connection method may bring many defects: on the one hand, when the conveying chain 105' gets stuck and slows down, the motor 1' may not be able to stop or decelerate in time, and a reverse torque will be generated at the stuck point. This torque will be transmitted back to the motor shaft, resulting in relative rotation between the motor shaft and the driving sprocket 102' and thus generating friction. Even the motor 1' may not be able to withstand this reverse torque, leading to damage to the motor 1'. On the other hand, when the conveying chain 105' jams and stops moving, since the motor 1' continues to operate while the conveying chain 105' cannot move normally, it may cause the conveying chain to be overstretched or broken, as well as rapid wear of the tooth surface of the driving sprocket 102', reducing the service life of the driving sprocket 102' and the conveying chain 105'; and during maintenance, there are more parts to be disassembled and assembled between the motor and the driving sprocket 102', and the repair and replacement operations will become extremely cumbersome and time-consuming. Since the driving structure of the cross-chain conveying system is relatively complex, it may require more frequent inspections and maintenance to ensure the normal operation of the conveying chain 105' and avoid failures. Summary of the Utility Model

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a driving mechanism for a cross-chain conveying system that is easy to maintain, safer and more reliable.

[0004] To this end, the utility model provides a driving mechanism for a cross-chain conveying system. The cross-chain conveying system includes a frame, a driving sprocket and a driven sprocket rotatably arranged on the frame, a chain track arranged on the frame, and a conveying chain connected between the driving sprocket and the driven sprocket and movable along the chain track. The driving mechanism includes:

[0005] A motor is installed on the frame, and an output sprocket is installed on the output shaft of the motor;

[0006] A transmission assembly is installed on the frame and is used to transmit the power of the output sprocket to the driving sprocket;

[0007] A control assembly includes a controller and a detection module that is signal-connected to the controller and is used to detect whether the driving sprocket rotates and the change in rotational speed. The controller is configured to control the motor to stop based on the detection signal of the detection module when the driving sprocket stops rotating or the rotational speed of the driving sprocket decreases.

[0008] According to an embodiment of the present invention, the transmission assembly includes a transmission seat, a transmission shaft rotatably provided on the transmission seat, a transmission sprocket installed on the transmission shaft, and a transmission chain drivingly connected between the output sprocket and the transmission sprocket. The driving sprocket is fixedly connected to the transmission shaft.

[0009] According to an embodiment of the present invention, the detection module is an encoder, and the encoder is installed on the frame and is drivingly connected to the transmission shaft.

[0010] According to an embodiment of the present invention, the encoder is drivingly connected to one end of the transmission shaft, the driving sprocket is installed on the other end of the transmission shaft, and the transmission sprocket is located between the encoder and the driving sprocket.

[0011] According to an embodiment of the present invention, the detection module is an encoder, a photoelectric sensor, a Hall effect sensor, an ultrasonic sensor, a magnetoresistive sensor, or a capacitive sensor.

[0012] According to an embodiment of the present invention, the controller is a PLC controller or an industrial computer.

[0013] According to an embodiment of the present invention, at least one friction plate or friction ring for frictionally cooperating with the output sprocket is provided on the output shaft of the motor.

[0014] According to an embodiment of the present invention, a plurality of friction plates for frictionally cooperating with the output sprocket are provided on the output shaft of the motor, and the plurality of friction plates are arranged at intervals along the axial direction of the output shaft of the motor.

[0015] According to an embodiment of the present invention, the cross-chain conveying system includes a carrying track provided on the lower side of the chain track, and an accumulation trolley movably provided on the carrying track and driven by the conveying chain to move.

[0016] According to an embodiment of the present utility model, a plurality of pushing parts are arranged on the conveying chain, and a pushing cooperation part cooperating with the pushing parts is arranged on the accumulation trolley.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] By using a transmission component to indirectly transmit power between the output sprocket of the motor and the driving sprocket, when the conveying chain gets stuck, it only needs to disassemble the transmission component to disconnect the power transmission between the output sprocket and the driving sprocket, and the operation is simpler; and when the conveying chain gets stuck, the motor can be timely controlled to stop by the control component, which is safer and more reliable. Description of the Drawings

[0019] Figure 1 is a schematic plan view of a cross-chain conveying system in the prior art (the motor is directly connected to the driving sprocket through a coupling);

[0020] Figure 2 is a schematic plan view of a cross-chain conveying system according to an embodiment of the present utility model;

[0021] Figure 3 is Figure 2 a schematic cross-sectional view taken along line A-A shown in

[0022] Figure 4 is Figure 2 a schematic cross-sectional view taken along line B-B shown in

[0023] Figure 5 is Figure 2 a schematic cross-sectional view taken along line C-C shown in

[0024] Figure 6 is Figure 2 a partial enlarged view at D shown in

[0025] Figure 7 is Figure 3 a partial enlarged view at E shown in

[0026] Figure 8 is Figure 2 a schematic control flow diagram of the driving mechanism shown in Detailed Embodiments

[0027] It is easy to understand that according to the technical solution of the present utility model, without changing the essential spirit of the present utility model, those of ordinary skill in the art can propose various interchangeable structural forms and implementation manners. Therefore, the following detailed embodiments and drawings are only illustrative descriptions of the technical solution of the present utility model, and should not be regarded as the whole of the present utility model or as a limitation or restriction on the technical solution of the present utility model.

[0028] According to Figure 2 and Figure 4 As shown, an embodiment of the present utility model provides a driving mechanism for a cross-chain conveying system 100. Among them, the cross-chain conveying system 100 includes a frame 101, a driving sprocket 102 and a driven sprocket 103 rotatably arranged on the frame 101, a chain track 104 arranged on the frame 101, and a conveying chain 105 connected between the driving sprocket 102 and the driven sprocket 103 and movable along the chain track 104. The driving mechanism includes a motor 1 and a transmission assembly 2. The motor 1 is installed on the frame 101, and an output sprocket 11 is installed on the output shaft of the motor 1. The transmission assembly 2 is installed on the frame 101 and is used to transmit the power of the output sprocket 11 to the driving sprocket 102. The conveying chain 105 is drivingly connected between the driving sprocket 102 and the driven sprocket 103. After the power of the motor 1 is transmitted to the driving sprocket 102 through the transmission assembly 2, the driving sprocket 102 makes a circular motion around an axis, and then drives the driven sprocket 103 to rotate together through the conveying chain 105, and the conveying chain 105 moves in a reciprocating cycle along the chain track 104.

[0029] According to Figure 5 and Figure 7 As shown, a carrying track 106 is arranged on the lower side of the chain track 104, and an accumulation trolley 107 driven by the conveying chain 105 to move is movably arranged on the carrying track 106. A plurality of pushing parts 1051 are arranged on the conveying chain 105, and a pushing matching part 1071 matched with the pushing parts 1051 is arranged on the accumulation trolley 107. A hanging part for hanging workpieces is connected to the accumulation trolley 107. When the conveying chain 105 moves in a reciprocating cycle along the chain track 104, the pushing parts 1051 on the conveying chain 105 push the pushing matching parts 1071 on the accumulation trolley 107, and then drive the accumulation trolley 107 to move along the carrying track 106. In other embodiments, the carrying track 106 and the accumulation trolley 107 may not be provided, and a hanging part for hanging workpieces may also be directly connected to the conveying chain 105, and the workpieces are directly transported by the conveying chain 105, and specific limitations are not made.

[0030] According to Figure 2 and Figure 6 As shown, the transmission assembly 2 includes a transmission seat 21, a transmission shaft 22 rotatably arranged on the transmission seat 21, a transmission sprocket 23 installed on the transmission shaft 22, and a transmission chain 24 drivingly connected between the output sprocket 11 and the transmission sprocket 23. The driving sprocket 102 is fixedly installed on the transmission shaft 22.

[0031] Since a transmission component 2 is used to indirectly transmit power between the output sprocket 11 of the motor 1 and the driving sprocket 102, when the conveying chain 105 gets stuck, it is only necessary to disassemble the transmission component 2 to disconnect the power transmission between the output sprocket 11 and the driving sprocket 102. Compared with the traditional structure where the motor and the driving sprocket are directly connected, fewer parts need to be disassembled and assembled, and the operation is more convenient.

[0032] According to Figure 2 and Figure 3 shown, it should be noted that when the conveying chain 105 gets stuck and slows down or even gets stuck and stops moving, the motor 1 may still run at a high speed briefly, resulting in the stretching of the conveying chain 105.

[0033] To solve this problem, a friction plate 12 for frictionally engaging with the output sprocket 11 is provided on the output shaft of the motor 1. When the conveying chain 105 gets stuck and slows down or even gets stuck and stops moving and the motor 1 is still running at a high speed, the output shaft of the motor 1 and the output sprocket 11 can rotate relative to each other, and the friction plate 12 is consumed by friction to protect the conveying chain 105 and the motor 1.

[0034] In other embodiments, a friction ring can also be used instead of the friction plate. And in order to enable the friction plate 12 or the friction ring to provide a better protection effect, a plurality of friction plates 12 or friction rings can be installed on the output shaft of the motor 1, and the plurality of friction plates 12 or friction rings can be arranged at intervals along the axial direction of the output shaft of the motor 1, and the specific arrangement is not limited.

[0035] According to Figure 8 shown, the driving mechanism further includes a control component 3. The control component 3 includes a controller 31 and a detection module 32 that is signal-connected to the controller 31 and is used to detect whether the driving sprocket 102 rotates and the change in rotational speed. The controller 31 is configured to control the motor 1 to stop based on the detection signal of the detection module 32 when the driving sprocket 102 stops rotating or the rotational speed of the driving sprocket 102 decreases.

[0036] Specifically, the detection module 32 can be an encoder. The encoder is installed on the frame 101 and is in transmission connection with the transmission shaft 22. The encoder can be in transmission connection with one end of the transmission shaft 22, the driving sprocket 102 is installed on the other end of the transmission shaft 22, and the transmission sprocket 23 is located between the encoder and the driving sprocket 102.

[0037] When the conveying chain 105 gets stuck and stops moving, the driving sprocket 102 will also stop rotating under the stretching action of the conveying chain 105. Since the encoder 32 sends a pulse signal to the controller 31 every time the driving sprocket 102 rotates a certain angle, when the driving sprocket 102 stops rotating, if the controller 31 does not receive the pulse signal fed back by the encoder 32 or the count of the pulse signals received by the controller 31 decreases significantly, the controller 31 will send a shutdown signal to the motor 1 to control the motor 1 to stop.

[0038] When the conveying chain 105 gets stuck and its moving speed slows down, the moving speed of the driving sprocket 102 will also slow down accordingly. The encoder 32 can send the pulse signal of the detected speed change of the driving sprocket 102 to the controller 31. The controller 31 calculates the rotation speed of the driving sprocket 102 at this time based on the pulse signal of the speed change of the driving sprocket 102. A rotation speed threshold can be pre-stored in the controller 31. This rotation speed threshold can be an interval value or the lowest rotation speed value when the driving sprocket 102 or the motor 1 is working. The controller 31 can compare the calculated real-time rotation speed value of the driving sprocket 102 with the pre-stored rotation speed threshold in the controller 31 and control whether to stop the motor 1 based on the comparison result. For example, when the real-time rotation speed value of the driving sprocket 102 is less than the rotation speed threshold, the controller 31 sends a shutdown signal to the motor 1 to control the motor 1 to stop.

[0039] Compared with the traditional structure where the motor 1 and the driving sprocket 102 are directly connected, when the conveying chain 105 gets stuck and slows down or even gets stuck and stops moving, using the control component 3 to timely control the motor 1 to stop is safer and more reliable.

[0040] In other embodiments, multiple encoders can be provided. And it is not limited to installing the encoder on the transmission shaft 22. The encoder can also be installed on the output shaft of the motor 1. For example, a dual-axis motor can be used. One of the shafts of the motor is used as the output shaft, and the encoder is installed on the other shaft to detect the rotation speed change or stop of the motor. It can also be coaxially installed with the driving sprocket 102, the driven sprocket 103 or the transmission sprocket 23. And in addition to the encoder, the detection module 32 can also be a photoelectric sensor, a Hall effect sensor, an ultrasonic sensor, a magnetoresistive sensor or a capacitive sensor. The controller 31 can be a PLC controller 31 or an industrial computer, and there is no specific limitation.

[0041] The technical scope of the present utility model is not limited to the content in the above specification. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present utility model, and these deformations and modifications should all fall within the protection scope of the present utility model.

Claims

1. A driving mechanism for a cross-chain conveying system, the cross-chain conveying system comprising a frame, a driving sprocket and a driven sprocket rotatably arranged on the frame, a chain track arranged on the frame, and a conveying chain connected between the driving sprocket and the driven sprocket and movable along the chain track, characterized in that, The driving mechanism includes: a motor, mounted on the frame, and an output sprocket is mounted on the output shaft of the motor; a transmission assembly, mounted on the frame and configured to transmit the power of the output sprocket to the driving sprocket; a control assembly, including a controller and a detection module that is signal-connected to the controller and is used to detect whether the driving sprocket rotates and the change in rotational speed. The controller is configured to control the motor to stop based on the detection signal of the detection module when the driving sprocket stops rotating or the rotational speed of the driving sprocket decreases.

2. The drive mechanism according to claim 1, characterized in that: The transmission assembly includes a transmission seat, a transmission shaft rotatably arranged on the transmission seat, a transmission sprocket mounted on the transmission shaft, and a transmission chain drivingly connected between the output sprocket and the transmission sprocket. The driving sprocket is fixedly connected to the transmission shaft.

3. The drive mechanism according to claim 2, wherein: The detection module is an encoder, and the encoder is mounted on the frame and is drivingly connected to the transmission shaft.

4. The drive mechanism according to claim 3, characterized in that: The encoder is drivingly connected to one end of the transmission shaft, the driving sprocket is mounted on the other end of the transmission shaft, and the transmission sprocket is located between the encoder and the driving sprocket.

5. The drive mechanism according to claim 1, characterized in that: The detection module is an encoder, a photoelectric sensor, a Hall effect sensor, an ultrasonic sensor, a magnetoresistive sensor or a capacitive sensor.

6. The drive mechanism according to claim 1, characterized in that: The controller is a PLC controller or an industrial computer.

7. The drive mechanism according to claim 1, characterized in that: At least one friction plate or friction ring for frictionally cooperating with the output sprocket is provided on the output shaft of the motor.

8. The drive mechanism according to claim 1, characterized in that: A plurality of friction plates for frictionally cooperating with the output sprocket are provided on the output shaft of the motor, and the plurality of friction plates are arranged at intervals along the axial direction of the output shaft of the motor.

9. The drive mechanism according to claim 1, characterized in that: The cross-chain conveying system includes a carrying track provided on the lower side of the chain track, and an accumulation trolley movably arranged on the carrying track and driven by the conveying chain to move.

10. The drive mechanism according to claim 9, characterized in that: A plurality of pushing portions are provided on the conveying chain, and a pushing cooperation portion cooperating with the pushing portions is provided on the accumulation trolley.

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