A high-speed reciprocating motion transmission device

Abstract

This utility model relates to the field of automotive manufacturing automation technology. To address the technical problems of complex structure, unstable operation, and low positioning accuracy in traditional equipment, this utility model discloses a high-speed reciprocating motion transmission device, comprising a pair of parallel guide components; at least one transmission unit disposed on the guide components; a power drive component for providing the driving force required for the reciprocating motion of the transmission unit; a power transmission component connecting the power drive component and the transmission unit; and a positioning and detection component for sensing the operating position of the transmission unit and achieving precise positioning control. The power transmission component includes a synchronous belt, with its two ends respectively wound around a driving pulley and a driven pulley, and connected to the transmission unit to achieve synchronous drive. An anti-deviation mechanism is provided on the side of the synchronous belt to limit its lateral deviation. Through a single-cart reciprocating architecture, high-precision synchronous belt transmission, and positioning control, the corresponding technical problems are solved.

Description

Technical Field

[0001] This utility model relates to the field of automotive manufacturing automation technology, and in particular to a high-speed reciprocating motion transmission device. Background Technology

[0002] In the body-in-white welding process of automobile manufacturing, conveying equipment is a crucial component for achieving automated connections between workstations. Currently, welding workshops primarily use the Accumulating Chain System (APC) as the conveying solution. Its typical structure includes multi-pallet circulating operation, chain drive combined with pneumatic stoppers for positioning, and an operating speed typically of 8.6 m / min. A single pallet can carry approximately 100 kg, with a positioning accuracy of ±1 mm. A turning mechanism is also required to achieve a closed-loop circulation. Despite its widespread application, this system has several drawbacks. For example, its complex mechanical structure and the need for multiple pallets and turning mechanisms result in high manufacturing and maintenance costs; the chain drive requires continuous lubrication, which can lead to contamination and makes it unsuitable for environments with high cleanliness requirements; furthermore, the system is typically in continuous operation, with the motor running even under no-load conditions, resulting in high energy consumption and low efficiency.

[0003] Therefore, there is an urgent need for a conveying device with a simpler structure, more efficient operation, and more precise positioning to meet the actual needs of current automated production lines in automobile manufacturing for high-speed, high-precision, low-pollution, and low-energy-consumption conveying systems. Utility Model Content

[0004] The purpose of this invention is to provide a high-speed reciprocating motion transmission device to solve the technical problems of complex structure, unstable operation and low positioning accuracy of traditional equipment.

[0005] To achieve the above objectives, this utility model provides a high-speed reciprocating motion transmission device, including a pair of parallel guide components for defining the reciprocating motion path of the transmission unit;

[0006] At least one transmission unit is disposed on the guide assembly and can reciprocate along it;

[0007] The power drive assembly is used to provide the driving force required for the reciprocating motion of the transmission unit;

[0008] The power transmission assembly connects the power drive assembly and the transmission unit, and is used to transmit driving force to the transmission unit;

[0009] Positioning and detection components are used to sense the operating position of the transmission unit and achieve precise positioning control;

[0010] The power transmission component includes a synchronous belt, with its two ends wound around the driving pulley and the driven pulley respectively, and connected to the transmission unit to achieve synchronous drive;

[0011] The synchronous belt is equipped with an anti-deviation mechanism on its side to limit its lateral deviation.

[0012] Traditional stacking chain systems (APCs) rely on multi-pallet circulation, turning mechanisms, and continuous chain operation, resulting in a complex mechanical structure. The motor runs continuously even when the system is unloaded, leading to high energy consumption.

[0013] This solution eliminates tray circulation and turning loops by using a reciprocating motion transmission method, simplifying the system structure. It also effectively reduces no-load energy consumption by controlling the trolley to start / stop at fixed points through synchronous drive control.

[0014] Chain drive systems are prone to vibration during high-speed operation, have limited positioning accuracy, suffer from significant chain wear, require continuous lubrication, and pollute the environment.

[0015] This solution employs a synchronous belt drive combined with an anti-deviation mechanism to ensure stable and non-deviation-prone operation of the synchronous belt, thereby improving the stability of motion control and transmission accuracy. Simultaneously, positioning and detection components enable high-precision monitoring and control of the transmission unit's position, meeting the demands of high-cycle, high-precision production.

[0016] Furthermore, the guide rail assembly includes two parallel, elongated grooved guide rails, which are fixedly connected by a crossbeam to form a main frame. The guide rails have grooves to limit the movement path of the trolley and provide support, guiding the trolley to slide horizontally. This structure, through the parallel guide rails and crossbeam forming a stable main frame, provides the trolley with a clear movement path and reliable structural support, ensuring its linear sliding accuracy in the horizontal direction and the overall structural strength of the system, thus contributing to the long-term stable operation of the equipment.

[0017] Furthermore, the power drive component includes a motor and a reducer. The motor is connected to the reducer and is used to drive the drive pulley to rotate. By combining the motor and reducer to drive the drive pulley, smooth drive of the synchronous belt is achieved, ensuring output power while allowing adjustment of the output speed to meet the drive requirements under different cycle times and load conditions, thereby improving the adaptability and energy efficiency of the overall machine operation.

[0018] Furthermore, the synchronous belt is meshed with both the driving and driven pulleys; the anti-deviation mechanism is located near both sides of the driving and driven pulleys, and is a shaft and roller structure. The synchronous belt achieves stable constant speed transmission, ensuring the synchronicity and accuracy of the trolley's reciprocating motion; the anti-deviation mechanism is located at both ends of the driving and driven pulleys, and can correct the synchronous belt in time when it deviates, preventing the belt from derailing, improving the system's operational reliability and extending the synchronous belt's lifespan.

[0019] Furthermore, the transmission unit is a trolley, including a U-shaped frame, traveling rollers, traveling guide wheels, and a tensioning mechanism. The U-shaped frame consists of a base plate and two side plates. Traveling rollers are installed on the inner side of the side plates, and the traveling rollers slide in contact with the middle side of the grooves in the guide rail. The traveling guide wheels are installed on the outer side of the side plates and cooperate with the upper and lower surfaces of the grooves in the guide rail to ensure smooth trolley operation. The trolley structure, through the combination of a U-shaped frame and multiple wheels, achieves multi-faceted contact with the guide rail, improving sliding stability and reducing offset and vibration. The tensioning mechanism can dynamically adjust the tension of the synchronous belt to prevent slack and slippage, ensuring smooth and stable movement, and is suitable for high-speed and high-frequency operation scenarios.

[0020] Furthermore, the positioning and detection components include a proximity sensor and a pneumatic positioning pin. The proximity sensor detects the position of the trolley, and the pneumatic positioning pin is inserted into the positioning hole of the trolley at a predetermined position to achieve precise positioning and mechanical locking. The proximity sensor provides real-time position detection feedback for the trolley, facilitating automatic system control and cycle coordination; the pneumatic positioning pin enables precise mechanical locking, ensuring the trolley stops accurately at the workstation, suitable for industrial applications requiring strict positioning, such as high-precision assembly or welding.

[0021] Furthermore, a reinforcing plate is provided between the bottom plate and the side plates of the U-shaped frame to enhance structural rigidity. Multiple vertical plates extend upwards from the bottom plate, with a horizontal plate with a perforated structure forming the top of each plate. The tensioning mechanism is mounted on this horizontal plate to adjust the tension of the synchronous belt. The reinforcing plates enhance the overall rigidity of the trolley, improve load-bearing capacity, and reduce deformation during operation. The upward-extending vertical plates and the perforated horizontal plate at their tops reduce weight while providing an installation platform for the tensioning mechanism, effectively improving the overall structural integration and maintainability.

[0022] The high-speed reciprocating motion transmission device provided by this utility model has the following advantages:

[0023] This invention defines the movement path of the transmission unit through a guide component, ensuring accurate and stable operation. The transmission unit, mounted on the guide component, achieves precise reciprocating motion, improving conveying efficiency and cycle control. The reciprocating conveying layout eliminates the need for a flipping and bending structure, reducing the failure rate. A power drive component provides the driving force, and a power transmission component composed of a synchronous belt efficiently and smoothly transmits power to the transmission unit, ensuring rapid motion response and no slippage. Synchronous belt drive replaces traditional chain drive, offering advantages such as oil-free operation, low noise, and low maintenance. An anti-deviation mechanism effectively prevents lateral shift of the synchronous belt during high-speed operation, improving system stability and service life. The positioning and detection component enables real-time monitoring and precise locking of the transmission unit's position. Once the trolley is in position, all mechanical parts remain stationary, reducing equipment wear and energy consumption. This ensures the positioning accuracy and control reliability of the entire machine, making it suitable for automated production lines with high requirements for speed, cycle time, cleanliness, and positioning accuracy. It boasts comprehensive advantages such as simple structure, low energy consumption, low pollution, and high reliability. By using a single-car reciprocating architecture, synchronous belt high-precision transmission and positioning control, the shortcomings of traditional solutions in terms of structural complexity and energy efficiency are systematically solved, making it particularly suitable for high-requirement scenarios such as body-in-white welding. Attached Figure Description

[0024] Figure 1 A system structure diagram of a high-speed reciprocating motion transmission device provided by this utility model;

[0025] Figure 2 An overall structural diagram of a high-speed reciprocating motion transmission device provided by this utility model;

[0026] Figure 3 The present utility model provides a solution for... Figure 2 Enlarged view of the structure at point A in the middle;

[0027] Figure 4 The present utility model provides a solution for... Figure 2 Enlarged view of the structure at point B;

[0028] Figure 5 The present utility model provides a solution for... Figure 2 Enlarged view of the structure at point C;

[0029] Figure 6 An enlarged view of the trolley structure provided for this utility model.

[0030] In the diagram: 11. Guide rail; 12. Crossbeam; 13. Profile rod; 14. Sensor bracket; 15. Proximity switch; 20. Trolley; 21. U-shaped frame; 22. Traveling roller; 23. Ear plate; 24. Vertical plate; 25. Horizontal plate; 26. Tensioning mechanism; 27. Reinforcing plate; 28. Traveling guide wheel; 31. Motor; 32. Reducer; 33. Anti-deviation mechanism; 34. Synchronous belt; 35. Pneumatic positioning pin; 36. Driven pulley. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this 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 this utility model and are not intended to limit this utility model.

[0032] See Figure 1 This invention provides a high-speed reciprocating motion transmission device, including a guiding component, a power drive component, a power transmission component, a transmission unit, and a positioning and detection component. The guiding component provides the basic structure, the power drive component provides the power source, the power transmission component provides the force channel, the transmission unit is the transport executor, and the positioning and detection component provides feedback for effective control. These components work together to form an efficient, precise, and reliable reciprocating transmission mechanism.

[0033] See Figures 2 to 6 It includes two parallel, elongated, slotted guide rails 11, which are fixedly connected by a crossbeam 12 to form a main frame. A transmission unit, a trolley 20, is installed on each side of the guide rails 11. The trolley 20 can move along the grooves on the outer side of the guide rails 11. The guide rails 11 are designed with grooves to limit the movement path of the trolley and provide support, guiding it to slide horizontally.

[0034] A motor 31, a reducer 32, and a drive pulley are mounted on one end of the guide rail 11, and a driven pulley 36 is mounted on the other end of the guide rail 11. A synchronous belt 34 is provided that meshes with the drive pulley and the driven pulley 36. A pair of anti-deviation mechanisms 33 are respectively provided on the sides of the drive pulley and the driven pulley 36. The two anti-deviation mechanisms 33 are located on both sides of the synchronous belt 34, close to the synchronous belt 34. The anti-deviation mechanism 33 is a shaft and roller structure. When the synchronous belt 34 deviates, it contacts the roller of the anti-deviation mechanism 33 and corrects the synchronous belt 34, thus achieving the anti-deviation effect.

[0035] The guide components not only support the entire operation of the vehicle, but also provide the mounting base for the drive components and detection devices, forming the "skeleton" platform of the entire equipment.

[0036] A motor 31 and a reducer 32 are mounted on one end of the guide rail 11. The motor 31, as a power source, drives the drive pulley to rotate after the output speed is adjusted by the reducer. The system further drives the synchronous belt through the power transmission assembly to drive the trolley.

[0037] The power parameters of the power drive component determine the trolley's running speed, acceleration and deceleration rhythm, and operating frequency, making it the core power module of the entire device.

[0038] By using a synchronous belt 34 as the power transmission medium, one end is connected to the motor via a driving pulley, and the other end is connected to the driven pulley 36 to achieve a closed-loop configuration. The synchronous belt 34 is connected to a tensioning mechanism 26 located at the bottom of the trolley, thereby driving the trolley to move back and forth.

[0039] To prevent the synchronous belt from deviating from its track due to lateral disturbances during operation, a pair of anti-deviation mechanisms 33 are provided on each side of the driving and driven pulleys. These mechanisms consist of a combination of shafts and rollers. If the synchronous belt deviates, the rollers will contact it and provide a corrective action, thereby maintaining the synchronous belt on the correct path and ensuring the stability of the system.

[0040] See Figure 6 The trolley 20 includes a U-shaped frame 21, which comprises a base plate and side plates on both sides. A reinforcing plate 27 is also provided between the base plate and the side plates to increase the structural strength of the U-shaped frame 21, thereby enhancing its structural rigidity and load-bearing capacity. Traveling rollers 22 are installed on the inner sides of the two side plates, and these rollers 22 are slidably connected to the grooves of the guide rail 11. Specifically, the sliding surfaces of the traveling rollers 22 contact the upper and lower surfaces of the grooves in the guide rail 11. A travel guide wheel 28 is also provided on the outer side of the traveling rollers 22, with its sliding surface contacting the middle surface of the groove in the guide rail 11. Both rollers and the guide rail 11 slide and engage with each other on the upper, lower, and middle surfaces respectively, ensuring that the trolley 20 runs smoothly along the guide rail 11.

[0041] The side plate of the U-shaped frame 21 is provided with an inwardly bent ear plate 23, which is used to cooperate with the upper structure of the guide rail 11 to form a lateral limit.

[0042] The base plate extends upward to form multiple vertical plates 24, and the vertical plates 24 form a horizontal plate 25. The horizontal plate 25 has a hollow structure for weight reduction and easy installation. The horizontal plate 25 is provided with a tensioning mechanism 26 for tensioning the synchronous belt 34, which is used to adjust the tension connected to the synchronous belt and improve transmission efficiency and response accuracy.

[0043] The design of this vehicle supports a single unit load of up to 250kg, while taking into account structural strength, precision and smooth movement, making it suitable for heavy-duty high-speed scenarios such as body-in-white welding.

[0044] Sensor brackets 14 and profile rods 13 are respectively installed on the left, middle and right ends of one side of the guide rail 21. A proximity sensor 15 is installed on the profile rod 13 to sense the position of the trolley. By feeding the signal back to the control system, it helps to realize intelligent monitoring during the movement process.

[0045] Pneumatic positioning pins 35 are provided on the left, middle and right sides of one side of the guide rail 21 for precise positioning of the trolley 20 and to achieve high-precision stopping positioning. This mechanism uses a cylinder to drive the positioning pins to pop out, which can be precisely inserted into the positioning holes set on the trolley 20 to achieve mechanical locking. This allows the trolley to stop with high precision after running to the designated position, ensuring the smooth operation of the automated production process.

[0046] In the structure described above, the guide component serves as the load-bearing and guiding foundation, forming the basic platform and motion track of the entire equipment. It provides the sliding path and mechanical support for the trolley, while also providing a structural carrier for the installation of drive and sensing components (such as motors, sensor brackets, etc.), thus constituting the "skeleton" of the entire system.

[0047] The power drive assembly, consisting of a motor 31 and a reducer 32, provides the power source and is the core of the system's power system. It transmits power to the synchronous belt 34 (power transmission assembly part) through the drive pulley. The power drive assembly determines the speed, rhythm, and direction of the trolley's movement. It converts electrical energy into mechanical motion and acts on the trolley through the power transmission assembly to achieve movement along the guide rail.

[0048] The power transmission assembly, whose power transmission medium includes a synchronous belt 34, a driving pulley, a driven pulley 36, and an anti-deviation mechanism 33, serves as a connecting bridge between the power drive assembly and the trolley 20. The synchronous belt 34 transmits the motor torque to the trolley 20 at a constant speed and synchronously, realizing reciprocating motion; the anti-deviation mechanism 33 ensures the stable and reliable operation of the synchronous belt. It receives the output of the power drive assembly and transmits power accurately and smoothly to the trolley.

[0049] The transmission unit is the core of execution and load-bearing. It is installed on the guide rail 11 and slides with the guide rail 11 through the traveling roller 22. It receives the thrust of the power transmission component to achieve high-speed movement. At the same time, as the load-bearing unit of the automobile component, it is the main body that directly performs the transmission task. The transmission unit also integrates a tensioning mechanism and a guiding structure to ensure the accuracy and stability of operation.

[0050] The positioning and detection components include sensors 15 and pneumatic positioning pins 35, which enable the monitoring and control of the trolley's position, ensuring that the trolley stops or starts accurately at a specific workstation to meet the requirements of automated processes. They interact directly with the trolley, detect its position, and provide feedback on the status to the control system, or achieve precise locking through pneumatic pins, ensuring that the entire system operates reliably according to the predetermined rhythm, process, and flow.

[0051] A typical workflow is as follows:

[0052] 1. Loading stage:

[0053] 1.1 The robot clamps the workpiece onto the trolley fixture.

[0054] 1.2 Photoelectric switch automatically identifies workpiece in position

[0055] 1.3 The system starts conveying after confirming that the workpiece is in place.

[0056] 2. Conveying stage:

[0057] 2.1 The trolley accelerates to the working speed according to the preset speed curve.

[0058] 2.2 Maintain a constant speed when passing through maintenance stations.

[0059] 2.3 Start decelerating when approaching the target workstation.

[0060] 3. Positioning Phase:

[0061] 3.1 Upon reaching the target workstation, the stop sensor is triggered, and the motor stops rotating.

[0062] 3.2 The pneumatic positioning pin extends for precise positioning of the trolley.

[0063] 3.3 The system sends a positioning signal to initiate the process operation, and the robot picks up the part.

[0064] 4. Return Phase:

[0065] 4.1 After the process is completed, the trolley returns to the loading station unloaded.

[0066] 4.2 The trolley accelerates to the working speed according to the preset speed curve.

[0067] 4.3 Entering the positioning stage, the car stops precisely and then waits.

[0068] 4.3 Preparing for the next work cycle

[0069] The high-speed reciprocating motion transmission device provided by this utility model has the following advantages:

[0070] Synchronous belt drive replaces chains, enabling oil-free and clean operation; a single-cart reciprocating architecture avoids the complex structure of traditional APC systems with multiple trays and bending mechanisms; improved load capacity and speed control; all drive components are stationary when the cart stops, reducing energy consumption and wear; an anti-deviation mechanism ensures the stability of synchronous belt operation; the overall design is suitable for scenarios such as automotive welding lines that require high speed, high load, and low pollution. This equipment generates power through a power drive component, which is stably transmitted to the transmission unit via a power transmission component. The cart achieves high-frequency reciprocating movement under the guidance of the guide component, while the positioning and detection components ensure positioning accuracy and feedback control during each movement. The system forms a highly integrated, low-error, low-maintenance, and high-efficiency transmission unit.

[0071] This invention is particularly applicable to scenarios in the automotive manufacturing industry where high positioning accuracy, operating speed, and load capacity are required, such as the body-in-white welding station.

[0072] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-speed reciprocating motion transmission device, characterized in that, include: A pair of parallel guide components are used to define the reciprocating motion path of the transmission unit; At least one transmission unit is disposed on the guide assembly and can reciprocate along it; A power drive assembly is used to provide the driving force required for the reciprocating motion of the transmission unit; A power transmission assembly, connecting the power drive assembly and the transmission unit, is used to transmit driving force to the transmission unit; A positioning and detection component is used to sense the operating position of the transmission unit and achieve precise positioning control; The power transmission assembly includes a synchronous belt (34), with its two ends wound around the driving pulley and the driven pulley (36) respectively, and connected to the transmission unit to achieve synchronous drive; The synchronous belt is provided with an anti-deviation mechanism (33) on its side to limit its lateral deviation.

2. The high-speed reciprocating motion transmission device according to claim 1, characterized in that, The guide rail assembly includes two parallel long slotted guide rails (11), which are fixedly connected by a crossbeam (12) to form a main frame. The guide rails (11) are provided with grooves to limit the movement path of the trolley and provide support, guiding the trolley to slide in the horizontal direction.

3. The high-speed reciprocating motion transmission device according to claim 1, characterized in that, The power drive assembly includes a motor (31) and a reducer (32). The motor (31) is connected to the reducer (32) and is used to drive the drive pulley to rotate.

4. The high-speed reciprocating motion transmission device according to claim 1, characterized in that, The synchronous belt (34) is meshed with the driving pulley and the driven pulley (36) respectively; the anti-deviation mechanism (33) is located near both sides of the driving pulley and the driven pulley (36), and the anti-deviation mechanism (33) is a shaft and roller structure.

5. A high-speed reciprocating motion transmission device according to claim 1, characterized in that, The transmission unit is a trolley (20), including a U-shaped frame (21), traveling rollers (22), traveling guide wheels (28), and a tensioning mechanism (26). The U-shaped frame (21) is composed of a base plate and two side plates. The traveling rollers (22) are installed on the inner side of the side plates. The traveling rollers (22) slide in cooperation with the middle side of the groove of the guide rail (11). The traveling guide wheels (28) are installed on the outer side of the side plates and cooperate with the upper and lower surfaces of the groove of the guide rail (11) to ensure that the trolley runs smoothly.

6. The high-speed reciprocating motion transmission device according to claim 1, characterized in that, The positioning and detection component includes a proximity sensor (15) and a pneumatic positioning pin (35). The proximity sensor (15) is used to detect the position of the trolley (20), and the pneumatic positioning pin (35) is used to insert into the positioning hole of the trolley (20) at a predetermined position to achieve precise positioning and mechanical locking.

7. A high-speed reciprocating motion transmission device according to claim 5, characterized in that, A reinforcing plate (27) is provided between the bottom plate and the side plate of the U-shaped frame (21) to enhance the structural rigidity; the bottom plate extends upward to provide multiple vertical plates (24), and a horizontal plate (25) with a hollow structure is formed on the top of the vertical plate; the tensioning mechanism (26) is set on the horizontal plate (25) to adjust the tension of the synchronous belt (34).

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