Workpiece transfer trolley for aluminum-steel welding production line

Abstract

The present application relates to aluminum steel welding workpiece transfer technical field, especially in kind of aluminum steel welding production line workpiece transfer trolley, including trolley body, drive mechanism, control mechanism, positioning detection mechanism and wireless remote control mechanism, trolley body and preset track cooperation, track is laid between each welding station of aluminum steel welding production line, the front and back two sides of trolley body are symmetrically provided with protection mechanism The present application has the advantages that: the trolley body runs more stable and reliable in the process of transferring workpieces, effectively avoids the deflection phenomenon during movement, can flexibly adjust the speed according to the demand, the positioning of the trolley body is more accurate and can realize efficient linkage with the welding machine, the structure is reasonable and convenient to maintain.

Description

Technical Field

[0001] This invention relates to the field of aluminum-steel welding workpiece transfer technology, and in particular to a workpiece transfer trolley for an aluminum-steel welding production line. Background Technology

[0002] In aluminum-steel welding production lines, workpieces need to be precisely transferred between multiple welding stations. The stability, accuracy, and automation level of the transfer process directly affect welding quality and production efficiency. Currently, existing aluminum-steel welding production lines mostly use manual push carts or simple electric transfer devices for workpiece transfer, which have many technical shortcomings: Firstly, existing transfer devices mostly use single-motor drives, which have insufficient driving force and poor operational stability. When carrying heavy aluminum and steel workpieces, they are prone to jamming and skewing. Furthermore, they lack reliable braking mechanisms, making it impossible to stop quickly in emergencies, posing safety hazards such as workpiece slippage and equipment damage. Secondly, the transfer speed cannot be flexibly adjusted, making it difficult to adapt to the cycle time requirements of different welding stations. Manual transfer mode is labor-intensive, while automatic transfer mode has a fixed speed that cannot be dynamically adjusted according to on-site conditions. Thirdly, the position detection accuracy is low, making it impossible to accurately locate the welding station. Manual alignment is required, resulting in low efficiency in welding station connection and easy alignment deviations that affect welding quality. Fourthly, the transfer trolley and welding machine lack effective interconnection. After the workpiece arrives at the station, the welding command needs to be manually triggered, making it impossible to achieve fully automatic linkage between transfer and welding processes, resulting in low automation. Fifthly, the trolley tooling is fixed, making it impossible to customize and adapt to different specifications and shapes of aluminum and steel workpieces. This results in poor versatility and difficulty in meeting diverse production needs. Therefore, further improvements to the existing technology are necessary. Summary of the Invention

[0003] The purpose of this invention is to provide a workpiece transfer trolley for an aluminum-steel welding production line to solve the problems of unstable operation and inaccurate positioning of existing transfer devices.

[0004] The present invention adopts the following technical solution: a workpiece transfer trolley for an aluminum-steel welding production line, comprising a trolley body, a drive mechanism, a control mechanism and a positioning and detection mechanism, wherein the trolley body cooperates with the track laid between each welding station of the aluminum-steel welding production line; The drive mechanism includes a DC motor that drives two symmetrically arranged walking wheels individually. Each DC motor is equipped with a brake device for braking the output shaft. The brake device is electrically connected to the control mechanism. The positioning detection mechanism is used to detect the real-time position of the vehicle and send position signals. The control mechanism is used to receive position signals and control signals and output control commands.

[0005] Optionally, the drive mechanism also includes a number of power collection blocks spaced apart on the trolley body, and the power collection blocks are always in contact with the track.

[0006] Optionally, the positioning detection mechanism includes an arrival information detection module and a workstation information detection module installed on the trolley body; the arrival information detection module and the workstation information detection module are used to acquire the arrival signal of the trolley body and the position code information of the corresponding welding workstation, respectively.

[0007] Optionally, the control mechanism includes a PLC controller, with the input terminal of the PLC controller connected to the positioning detection mechanism and the output terminal connected to the braking device.

[0008] Optionally, it also includes a wireless remote control mechanism for switching between manual and automatic operation modes, with the wireless control mechanism communicating with the control mechanism.

[0009] Optionally, the top of the trolley body is detachably equipped with tooling components for clamping the welded workpiece.

[0010] Optionally, protective mechanisms are symmetrically arranged on the front and rear sides of the trolley body. The protective mechanisms include braking components and guiding components. The cooperation of the two corresponding guiding components at the front and rear of the trolley body can keep the trolley body in a centered state at all times. The braking components can use the inertia generated at the moment of emergency braking of the trolley body to form a braking force between the trolley body and the track.

[0011] Optionally, the braking assembly includes a detachable mounting plate 1 mounted on the trolley body, a mounting plate 2 mounted on one side of the mounting plate 1, a weight that slides horizontally along the track direction and can automatically reset on the top surface of the mounting plate 2, a moving part that slides vertically inside the mounting plate 1 and the mounting plate 2, a brake block that is symmetrically and detachably mounted on the top surface of the moving part and parallel to the bottom surface of the upper horizontal section of the track, and a power storage module between the moving part and the weight. When the moving part is at its lowest point, the moving part can maintain a stable position through the power storage module and is in a power storage state for upward movement. When the weight moves inertia and cooperates with the power storage module during emergency braking of the trolley body, it releases the position restriction of the moving part, causing the moving part to rise instantaneously and make full contact between the brake block and the track.

[0012] Optionally, the guide assembly includes two symmetrically horizontally rotating guide wheels that are symmetrically rotated at the end of the moving part facing the track. When the mounting plate is installed on the trolley body, the two guide wheels make rolling contact with the vertical surface of the track.

[0013] Optionally, the top surface of the moving part is vertically slidably provided with a push plate that can be reset upwards. The lower end of the push plate is symmetrically and horizontally slidably provided with two push blocks with arc surfaces on their outer sides that can be reset in the center. The arc surfaces of the two push blocks face the corresponding guide wheels. The top surface of the push plate is provided with an extension plate parallel to the top surface of the brake block. When the push plate moves downwards, it can push the two push blocks to move to both sides and make full contact with the guide wheels.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. Stable and reliable operation: It adopts dual DC motors for symmetrical drive, with sufficient driving force, which can effectively avoid jamming and tilting when the trolley is carrying heavy objects; the DC motor is equipped with a braking device to achieve rapid braking. Combined with the proximity switch for position detection, it further improves the stability and safety of the transfer process, reduces the risk of workpiece slippage and equipment damage, and is suitable for the continuous operation requirements of aluminum steel welding production lines.

[0015] 2. Flexible speed adjustment: Through the cooperation of motor driver and PLC controller, the speed of the trolley can be precisely adjusted. In manual mode, the speed can be flexibly controlled according to the operation requirements. In automatic mode, it maintains a constant speed, adapts to the difference in cycle time of different welding stations, improves the connection efficiency between transfer and welding processes, and solves the problems of fixed speed and poor adaptability of existing devices.

[0016] 3. Precise positioning and efficient linkage: Through the cooperation of card readers and detection cards, the trolley can be accurately positioned at each welding station with small positioning error and no need for manual alignment; the PLC controller is interconnected with the welding machine to realize the fully automatic linkage of workpiece transfer and welding process, reduce manual intervention, improve production efficiency, avoid errors caused by manual operation, and ensure welding quality.

[0017] 4. High versatility and high degree of automation: Tooling components can be customized according to the workpiece conditions on site, adapting to aluminum and steel workpieces of different specifications and shapes, solving the problems of fixed tooling and poor versatility of existing trolleys; it supports switching between manual and automatic modes, and in automatic mode, it can realize fully automated transfer without human intervention, greatly reducing the intensity of manual labor, which is in line with the intelligent development trend of aluminum and steel welding production lines, and can effectively improve the overall automation level of the production line. Based on the experience of existing intelligent production lines, it can help increase production efficiency by more than 30%.

[0018] 5. Reasonable structure and convenient maintenance: The control box integrates PLC, motor driver and circuit breaker, with a compact structure, which is easy to install and maintain; the electrical connection between each component is reliable, the signal transmission is stable, the failure rate is low, and it can operate stably for a long time, reducing equipment maintenance costs. At the same time, the wireless remote control adopts industrial-grade automatic frequency hopping technology to avoid on-site interference and ensure stable transmission of control commands.

[0019] 6. Emergency braking and anti-deviation are more effective. Through the braking and guiding components in the protective mechanism, friction braking between the trolley body and the track can be further realized when the trolley body is in emergency braking. This not only further reduces the distance of the trolley body due to inertial lurch during emergency braking, improving the safety and effectiveness of emergency braking, but also keeps the trolley body in a centered state during operation, effectively preventing the trolley body from deviating. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the trolley body and track of the present invention; Figure 3 This is a side view of the main body of the vehicle according to the present invention; Figure 4 This is a bottom view of the vehicle body of the present invention; Figure 5 This is a schematic diagram of the structure of the detection card and detection plate of the present invention; Figure 6 This is a schematic diagram of the structure of the wireless remote controller of the present invention; Figure 7 This is a schematic diagram of the control mechanism of the present invention; Figure 8 This is a schematic diagram showing the installation position of the protective mechanism of the present invention; Figure 9 This is a schematic diagram of the structure of the protective mechanism of the present invention when it is used in conjunction with the track; Figure 10 This is a schematic diagram of the structure of the moving component of the present invention. Figure 1 ; Figure 11 This is a schematic diagram of the braking assembly of the present invention. Figure 2 ; Figure 12 This is a cross-sectional structural diagram of the braking assembly of the present invention; Figure 13 This is a schematic diagram of the structure of the guiding component of the present invention; Figure 14 For the present invention Figure 12 Enlarged structural diagram at point B; Figure 15 For the present invention Figure 9 A magnified structural diagram of point A in the middle.

[0021] In the diagram: 1. Car body; 2. Welding machine; 3. Wheels; 4. Track; 5. DC motor; 6. Braking device; 7. Power take-up block; 8. Control box; 9. PLC controller; 10. Motor driver; 11. Circuit breaker; 12. Detection board; 13. Detection card; 14. Fixing plate; 15. Proximity switch; 16. Card reader; 17. Wireless remote control; 18. Protective mechanism; 19. Mounting plate one; 20. Mounting plate two; 21. Slide one; 22. Weight; 23. Slide two; 24. Mounting block one; 25. Limiting rod 26. Spring 1; 27. Receiving groove 1; 28. Receiving groove 2; 29. ​​Moving part; 30. Storage spring 2; 31. L-shaped receiving groove 3; 32. Limiting block; 33. T-shaped part 1; 34. Spring 3; 35. T-shaped part 2; 36. Moving strip; 37. Groove 1; 38. Groove 2; 39. Brake block; 40. Electric push rod; 41. Guide wheel; 42. Receiving groove 4; 43. Frame; 44. Push plate; 45. Push block; 46. Mounting block 2; 47. Spring 4; 48. Spring 5; 49. Extension plate. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art should understand that the embodiments described below are only a part of the embodiments disclosed in this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of this invention.

[0023] Various non-limiting embodiments of the present invention are described in detail below. Any number of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning.

[0024] The principles and spirit of the present invention will be explained in detail below with reference to several representative embodiments.

[0025] Please see Figure 1-7 The present invention will now be described in detail with reference to the accompanying drawings and embodiments: A workpiece transfer trolley for an aluminum-steel welding production line includes a trolley body 1, a drive mechanism, a control mechanism, a positioning and detection mechanism, and a wireless remote control mechanism.

[0026] The trolley body 1 is made of steel plate welded into shape, with a stable overall structure that can carry aluminum and steel workpieces of different weights. Four traveling wheels 3 are installed at the bottom of the trolley. The four traveling wheels 3 are symmetrically arranged and cooperate with the preset track 4 to ensure that the trolley runs smoothly along the track 4. The track 4 is made of I-beam steel and is laid between each welding station of the aluminum and steel welding production line.

[0027] A welding machine 2 for controlling the welding device is installed on one side of track 4. Both the welding device and the welding machine are existing technologies and will not be described in detail here.

[0028] Please see Figure 4 The drive mechanism includes two DC motors 5 and two braking devices 6. The two DC motors 5 are symmetrically mounted on both sides of the bottom of the trolley body 1, and are respectively connected to two walking wheels 3 symmetrically positioned on both sides of the guide rail. The transmission connection can be achieved by a gear set or a chain and sprocket, whichever is required. Using a dual-motor drive not only enhances the driving force of the trolley body 1, making it suitable for transporting heavy aluminum and steel workpieces, but also allows adjustment of the trolley body 1's walking posture by adjusting the speed of the two DC motors 5. This system allows the tilted trolley body 1 to be readjusted, effectively ensuring the smooth operation of the trolley body 1 and preventing jamming, thus improving the efficiency of workpiece transportation. Two braking devices 6 are connected to two DC motors 5 respectively, and are electrically connected to the control mechanism. The braking devices 6 employ an electromagnetic braking structure and are specifically installed on the output shaft at the tail of the DC motors 5. Four power-collecting blocks 7 are also spaced apart on the trolley body 1. The bottom surfaces of these four power-collecting blocks 7 are always in contact with the top surface of the track 4 to wirelessly power the transport trolley. The power-collecting blocks 7 supply power to the DC motors 5 via a voltage conversion circuit. The DC motors 5, electromagnetic braking mechanism, power-collecting blocks 7, and voltage conversion circuit described above are all existing technologies and will not be elaborated further.

[0029] When the trolley needs to stop or an emergency occurs (such as when the trolley in front stops moving while the trolley behind continues to move), the control mechanism sends a braking command to the braking device 6. The braking device 6 quickly locks the output shaft of the DC motor 5, thereby stopping the rotation of the traveling wheels 3, achieving an immediate stop of the trolley, ensuring safe transport, and the braking response time is ≤0.2 seconds, which complies with industrial safety standards.

[0030] Please see Figure 4-5 The positioning and detection mechanism includes an arrival information detection module and a workstation information detection module installed on the trolley body; the arrival information detection module and the workstation information detection module are used to obtain the arrival signal of the trolley body and the position code information of the corresponding welding workstation, respectively.

[0031] The positioning information detection module and the workstation information detection module include a proximity switch 15 and a card reader 16, respectively. Detection plates 12 and detection cards 13 are spaced apart along the length of the track 4. The detection cards 13 and detection plates 12 are installed on the bottom surface through a fixing plate 14. The detection cards 13 are fixedly set for each welding workstation and have built-in position code information for that workstation. They are used to cooperate with the card reader 16 to realize the position code detection of the welding workstation. The detection plates 12 are made of metal and are used to cooperate with the proximity switch 15 to realize the positioning detection of the trolley. The proximity switch 15 is an inductive proximity switch 15, which is installed at the bottom of the trolley body 1 and is set to correspond to the detection plate 12 in the middle of the track 4. Multiple proximity switches 15 can be set, one of which must correspond to the position of the detection plate 12, and the other proximity switches 15 are used as backups. When the trolley tends to deviate from the track 4 during operation, the distance between the proximity switch 15 and the detection plate 12 changes, and the proximity switch 15 sends a deviation signal to the PLC controller 9. The PLC controller 9 immediately controls the two DC motors 5 to adjust their speed (that is, adjusts the speed difference between the two DC motors 5 to actively control the trolley to return to the appropriate position), corrects the running direction of the trolley, and prevents the trolley from derailing. Please see Figure 4-5 The card reader 16 is an RFID card reader, which is installed at the bottom of the trolley body 1 near the driving wheel 3 and corresponds to the position of the detection card 13. When the trolley runs to the designated welding station, the card reader 16 reads the position code information in the detection card 13 and transmits the position signal to the PLC controller 9. After the PLC controller 9 confirms that the position is correct, it controls the DC motor 5 to stop, so as to achieve accurate positioning of the trolley with a positioning error of ≤2mm.

[0032] Please see Figure 4 , 7The control mechanism includes a control box 8 embedded in the trolley body 1. The control box 8 has a sealed structure to prevent fumes and spatter generated during welding from entering its interior, thus protecting the internal electrical components. Inside the control box 8 are a PLC controller 9, a motor driver 10, and a circuit breaker 11. The circuit breaker 11 is connected to the power supply and provides overload and short-circuit protection for the entire control circuit, preventing damage to electrical components. The PLC controller 9 serves as the control core, and its input terminals are connected to a proximity switch 15, a card reader 16, a wireless remote control mechanism, and the welding machine 2, respectively, to receive signals from various devices. Various detection and control signals, such as the position signal after the card reader 16 reads the detection card 13, the welding completion signal issued by the welding machine, and the control signal output by the wireless remote control mechanism, are connected to the brake device 6 and the motor driver 10 respectively for outputting control commands. The motor driver 10 is a Mitsubishi FR-D model and is electrically connected to two DC motors 5. Through the control of the PLC controller 9, the input frequency of the DC motors 5 is adjusted, thereby realizing stepless adjustment of the trolley's running speed. The speed adjustment range is 0.1-0.5m / s, meeting the cycle time requirements of different welding stations. The power supply is existing technology and will not be described in detail here.

[0033] Please see Figure 2 , 6 The wireless remote control mechanism includes a wireless remote controller 17 and a wireless signal receiver. The wireless signal receiver receives control signals sent by the wireless remote controller 17 and communicates with the PLC controller 9. The wireless remote controller 17 adopts an industrial-grade wireless remote control device, supports automatic frequency hopping technology, and has an effective remote control distance of 50 meters. It avoids interference from on-site welding equipment and electrical equipment, ensuring stable signal transmission. The wireless remote controller 17 is equipped with a mode switch key, a start / stop key, a direction adjustment key, and a speed adjustment knob. The mode switch key is used to switch between manual and automatic modes. The start / stop key is used to control the start and stop of the trolley. The direction adjustment key is used to control the forward and backward movement of the trolley. The speed adjustment knob is used to adjust the running speed of the trolley in manual mode. The wireless remote controller 17 is connected to the PLC controller 9 via a wireless signal. Operators can remotely control the operation of the trolley from a safe area, reducing the frequency of entering the welding danger zone and lowering safety risks. The wireless signal receiver is existing technology and will not be described in detail here.

[0034] The top of the trolley body 1 is detachably equipped with a tooling assembly for clamping the welded workpiece. It can be fixedly connected to the trolley body 1 by bolts. The tooling assembly can be customized according to the specifications and shape of the aluminum and steel workpieces on site to ensure that the workpieces are placed stably and to avoid shaking or slipping during transportation. It can adapt to the transportation needs of different types of aluminum and steel workpieces, and at the same time facilitate the replacement and maintenance of tooling, making full use of existing resources and reducing production costs.

[0035] In this embodiment, the transfer trolley is interconnected with the welding machine 2 of the aluminum-steel welding production line, and the PLC controller 9 is connected to the control terminal of the welding machine 2 through a communication line to realize signal interaction; its working process is as follows: 1. Tooling installation: Based on the specifications and shape of the aluminum steel workpiece to be transferred, install the customized tooling components, fix the workpiece on the tooling components, and ensure that the workpiece is accurately positioned and placed stably; 2. Mode Selection: Select manual or automatic operation mode using the mode switch button on the wireless remote control 17. In manual operation mode, the operator can control the trolley to move forward and backward using the direction adjustment button on the wireless remote control 17 and adjust the running speed using the speed adjustment knob to meet the needs of debugging, emergency or special workstation docking. In automatic operation mode, the PLC controller 9 controls the trolley to run along the track 4 at a constant speed according to the preset transfer program, without manual intervention. 3. Station Positioning: During the operation of the trolley, the proximity switch 15 detects the distance to the detection board 12 in real time to ensure that the trolley runs smoothly along the track 4 and avoids derailment; when the trolley approaches the designated welding station, the card reader 16 reads the position information of the corresponding detection card 13 on the track 4 and transmits it to the PLC controller 9. The PLC controller 9 controls the DC motor 5 to slowly decelerate through the motor driver 10 until the trolley stops precisely next to the welding station. At the same time, it controls the braking device 6 to brake and prevent the trolley from sliding. 4. Welding linkage: After the PLC controller 9 confirms that the trolley has arrived at the designated workstation, it sends a workstation ready signal to the welding machine 2. After receiving the signal, the welding machine 2 starts the welding operation and welds the workpiece. 5. Subsequent transfer: After welding is completed, welding machine 2 sends a welding completion signal to PLC controller 9. After receiving the signal, PLC controller 9 controls the brake device 6 to release, starts DC motor 5, drives the trolley to leave the current workstation, and goes to the next preset welding workstation. The above process is repeated to realize the continuous and fully automatic transfer of workpieces.

[0036] Please see Figure 8-15To further address the issues of the trolley body 1 still moving a certain distance due to the inertia of the trolley body 1 and the workpiece when braking by the braking device 6, and the trolley body 1 swerving and jamming during its movement on the track 4, protective mechanisms 18 are symmetrically arranged on the front and rear sides of the trolley body 1. Each protective mechanism 18 includes a braking component and a guiding component. The cooperation of the two corresponding guiding components at the front and rear of the trolley body 1 ensures that the trolley body 1 remains centered, preventing swerving during movement and ensuring smooth movement, thus improving the trolley's transport efficiency. The braking component utilizes the inertia generated during emergency braking to create a brake between the trolley body 1 and the track 4, further increasing the braking effect and reducing the distance the trolley body 1 continues to move due to inertia during emergency braking, thereby improving the effectiveness and safety of the trolley body 1 during emergency stops.

[0037] Please see Figure 10-12 The braking assembly includes a detachable mounting plate 19 mounted on the outer wall of the trolley body 1. A mounting plate 20 is fixedly mounted on the side of the mounting plate 19 facing the track 4. A groove 21 is opened on the top surface of the mounting plate 20. A square weight 22 is horizontally slidably mounted in the groove 21 along the direction of the track 4. A groove 23 is opened on both sides of the groove 21. Mounting blocks 24 are symmetrically mounted on both sides of the weight 22 and slide in the groove 23 on the corresponding side. Limiting rods 25 are fixedly mounted on both sides of the mounting blocks 24. The other end of the limiting rods 25 passes through and slides in the groove 23. A spring 26 is fixedly mounted between the mounting blocks 24 and the inner wall of the groove 23 and sleeved on the limiting rods 25. The setting of the spring 26 allows the weight 22 to automatically return to the center after horizontal sliding. Rectangular receiving grooves 27 and 28 are respectively provided on the sides of mounting plate 19 and mounting plate 20. Receiving groove 1 27 and receiving groove 28 are connected, and the vertical height of receiving groove 1 27 is lower than the vertical height of receiving groove 28. A moving part 29 is vertically slidably arranged in receiving groove 1 27 and receiving groove 28. A brake block 39 is symmetrically and detachably fixed on the top surface of the side of the moving part 29 facing the track 4. The top surface of the brake block 39 is parallel to the bottom surface of the upper horizontal section of the track 4.

[0038] The braking assembly also includes a power storage module disposed between the moving part 29 and the weight 22. The power storage module includes several power storage springs 30 fixedly disposed between the top surface of the moving part 29 and the top surface of the receiving groove 28. When the top surface of the moving part 29 contacts the top surface of the receiving groove 27, the power storage springs 30 are still in a stretched state. L-shaped receiving grooves 31 are symmetrically opened on both sides of the receiving groove 28. Limiting blocks 32 that slide within the vertical section of the L-shaped receiving grooves 31 are fixedly disposed on both sides of the moving part 29. The lower end surface of the limiting blocks 32 is inclined. On the first surface, a T-shaped component 33 is slidably disposed on the inner wall of the horizontal section of the L-shaped receiving groove 31. The horizontal end of the T-shaped component 33 is inside the L-shaped receiving groove 31, and the vertical end of the T-shaped component 33 is outside the mounting plate 20. A spring 34 is fixedly disposed between the vertical end of the T-shaped component 33 and the mounting plate 20. An inclined surface 2 is disposed at the top of the horizontal end of the T-shaped component 33. When the spring 34 is at its original length, the inclined surface 2 is inside the vertical section of the L-shaped receiving groove 31 and is on the same vertical surface as part of the limiting block 32. T-shaped parts 35 are horizontally slidably installed at both ends of the slide groove 3. The vertical end of the T-shaped parts 35 is located inside the slide groove 21. The top surface of the slide groove 21 is opened downwards to form the slide groove 3, which communicates with the horizontal section of the L-shaped receiving groove 31. A moving strip 36 is vertically slidably installed inside the slide groove 3. The moving strip 36 is located between the T-shaped parts 33 and 35. The top surface of the T-shaped parts 33 has a slot 37 with a right-side slope, and the bottom surface of the T-shaped parts 35 has a slot 38 with a left-side slope. The upper left side and lower right side of the moving strip 36 are sloped. The inclined surfaces at the top and bottom ends slide in contact with the inclined surfaces of slot 2 38 and slot 1 37, respectively. An electric push rod 40 is fixedly installed on the outside of the mounting plate 19. The electric push rod 40 is connected to the PLC controller 9, the wireless remote controller 17 and the power supply. It can be automatically controlled by the PLC controller 9 or manually controlled by the wireless remote controller 17. The electric push rod 40 is located directly above the moving part 29 that extends out of the mounting plate 19. When the electric push rod 40 is fully retracted, the moving end of the electric push rod 40 is higher than the top surface of the receiving slot 27.

[0039] Before the trolley body 1 is transferred normally, the electric push rod 40 is first activated to extend. The moving end of the electric push rod 40 pushes the moving part 29 downward along the receiving groove 27. At this time, the spring 2 is gradually pulled up further. As the moving part 29 descends, the inclined surface 1 at the lower end of the limiting block 32 gradually contacts the inclined surface 2 of the T-shaped part 33, thereby pushing the T-shaped part 33 outward. When the limiting block 32 passes the T-shaped part 33, the T-shaped part 33 is reset by the spring 34, so that the T-shaped part 33 is in the position of the limiting block 32. Above, when the electric push rod 40 retracts, the moving part 29 is positioned by the cooperation of the T-shaped part 33 and the limiting block 32, thus keeping the storage spring in a stretched, stored state. When the trolley body 1 is braked by the brake device 6, the trolley body 1 and the weight 22 instantly generate inertia, causing the weight 22 to continue sliding from the middle of the slide groove 21 towards the front end, causing the weight 22 to push the T-shaped part 35 outward (the trolley body 1 stops slowly during normal movement, thus...). During normal movement, there is no significant inertial surging. Therefore, during the normal movement of the trolley body 1, the weight 22 will not have a large displacement due to the restriction of the spring 26, and thus will not push the T-shaped part 35. Only the inertial force generated by the trolley body 1 during emergency braking will cause the weight 22 to push the T-shaped part 35, ensuring that the braking effect of the braking component will not be triggered during normal movement. When the T-shaped part 35 moves outward, it pushes the moving bar 36 downward through the inclined plane. The moving bar 36 moves downward and then pushes the T-shaped part 33 outward through the inclined plane. When the T-shaped part 33 moves outward, it disengages from the limiting block 32. At the moment the T-shaped part 33 disengages from the limiting block 32, the restriction on the moving part 29 is released, and the storage spring 30 instantly resets, causing the moving part 29 to rise instantly. Thus, the brake block 39 instantly makes full contact with the track 4, realizing surface friction braking between the trolley body 1 and the track 4, thereby reducing the distance of inertial surging during emergency braking of the trolley body 1.

[0040] Please see Figure 13 , 15 The guide assembly includes two guide wheels 41. The moving part 29 has a receiving groove 42 at one end facing the track 4. The two guide wheels 41 rotate symmetrically and horizontally in the receiving groove 42. When the mounting plate 19 is installed on the trolley body 1, the two guide wheels 41 roll in contact with the vertical surface of the track 4. Through the cooperation of the guide wheels 41 on both sides of the trolley body 1, the trolley body 1 is always in the middle of the track 4, thereby avoiding the trolley body 1 from tilting during movement.

[0041] Please see Figure 13-14To further improve the braking effect with the track 4, a frame 43 is fixedly installed in the receiving groove between the two guide wheels 41. A push plate 44 is vertically and slidably installed on the top surface of the moving part 29 of the two brake blocks 39. The lower end of the push plate 44 penetrates the top surface of the frame 43 and is inside. Two push blocks 45 with arc surfaces on their outer sides adapted to the guide wheels 41 are provided on both sides of the push plate 44. The arc surfaces of the two push blocks 45 face the corresponding guide wheels 41. Inclined surfaces are provided on both sides of the lower end of the push plate 44 and the upper inner side of the push blocks 45. Mounting blocks 2 46 are symmetrically fixedly installed on both sides of the push plate 44 inside the frame 43. A spring 47 is fixedly installed between the bottom surface of the mounting block 2 46 and the bottom surface of the frame 43. The spring 47 is located between the two push blocks 45. A spring 5 48 is installed between the two push blocks 45. The spring 5 48 is offset from the spring 47. An extension plate 49 parallel to the bottom surface of the upper horizontal section of the track 4 is fixedly installed on the top surface of the push plate 44.

[0042] When the mounting plate 19 is installed on the trolley body 1 and the moving part 29 is at the bottom of the receiving groove 27 (when the limiting block 32 is below the T-shaped part 33), the brake block 39 and the extension plate 49 are both at a certain gap with the bottom surface of the upper horizontal section of the track 4, and the gap between the extension plate 49 and the bottom surface of the upper horizontal section of the track 4 is smaller than the gap between the brake block 39 and the bottom surface of the upper horizontal section of the track 4.

[0043] During the instantaneous ascent of the moving part 29, the extension plate 49 first contacts the bottom surface of the upper horizontal section of the track 4, and then pushes the push plate 44 downward. The downward movement of the push plate 44 pushes the two push blocks 45 outward, so that the arc surfaces of the two push blocks 45 fully contact the guide wheels 41 on both sides, thereby locking the two guide wheels 41. This further enables friction braking between the guide wheels 41 and the track 4, further improving the braking effect and further reducing the inertial transmission distance of the trolley body 1 during emergency braking.

[0044] When the moving part 29 is once again at the lowest end of the receiving groove 27, the extension plate 49 and the brake block 39 reset and separate from the track 4. As the extension plate 49 and the push plate 44 reset, the two push blocks 45 are reset by the spring 5 48, thereby releasing the lock on the guide wheel 41 and allowing the guide wheel 41 to rotate normally.

[0045] In order to further adjust the pushing distance of the weight block 22 to push the T-shaped part 35, several slots 38 can be opened at intervals on the T-shaped part 35, and then the slots 38 at appropriate positions can be selected to cooperate with the moving strip 36 as needed.

[0046] Based on the above description in this specification, those skilled in the art will also understand that terms used, such as "upper," "lower," "front," "rear," "left," "right," "inner," and "outer," which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0047] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A workpiece transfer trolley for an aluminum-steel welding production line, characterized in that: It includes the trolley body, drive mechanism, control mechanism and positioning detection mechanism. The trolley body cooperates with the tracks laid between each welding station of the aluminum-steel welding production line. The drive mechanism includes a DC motor that drives two symmetrically arranged walking wheels individually. Each DC motor is equipped with a brake device for braking the output shaft. The brake device is electrically connected to the control mechanism. The positioning and detection mechanism is used to detect the real-time position of the vehicle and send position signals. The control mechanism is used to receive position signals and control signals and output control commands.

2. The workpiece transfer trolley of the aluminum-steel welding production line according to claim 1, characterized in that: The drive mechanism also includes several power collection blocks spaced apart on the trolley body, and several power collection blocks are in contact with the track.

3. The workpiece transfer trolley of the aluminum-steel welding production line according to claim 1, characterized in that: The positioning detection mechanism includes an arrival information detection module and a workstation information detection module installed on the trolley body; the arrival information detection module and the workstation information detection module are used to obtain the arrival signal of the trolley body and the position code information of the corresponding welding workstation, respectively.

4. The workpiece transfer trolley of the aluminum-steel welding production line according to claim 1, characterized in that: The control mechanism includes a PLC controller, whose input is connected to the positioning and detection mechanism and whose output is connected to the braking device.

5. The workpiece transfer trolley of the aluminum-steel welding production line according to claim 1, characterized in that: It also includes a wireless remote control mechanism for switching between manual and automatic operation modes, and the wireless control mechanism is connected to the control mechanism.

6. The workpiece transfer trolley of the aluminum-steel welding production line according to claim 1, characterized in that: The top of the trolley body is detachably equipped with tooling components for clamping the welded workpieces.

7. The workpiece transfer trolley of the aluminum-steel welding production line according to claim 1, characterized in that: The trolley body is symmetrically equipped with protective mechanisms on the front and rear sides. The protective mechanisms include braking components and guiding components. The cooperation of the two corresponding guiding components at the front and rear of the trolley body can keep the trolley body in a centered state. The braking components can use the inertia generated at the moment of emergency braking of the trolley body to form a braking force between the trolley body and the track.

8. The workpiece transfer trolley of the aluminum-steel welding production line according to claim 7, characterized in that: The braking assembly includes a detachable mounting plate 1 mounted on the trolley body, a mounting plate 2 mounted on one side of the mounting plate 1, and a weight that slides horizontally along the track direction and can automatically reset on the top surface of the mounting plate 2. A moving part is vertically slidably mounted inside the mounting plate 1 and the mounting plate 2. A brake block parallel to the bottom surface of the upper horizontal section of the track is symmetrically and detachably mounted on the top surface of the moving part. A power storage module is set between the moving part and the weight. When the moving part is at its lowest point, it can maintain a stable position through the power storage module and is in a power storage state for upward movement. When the weight moves inertia during emergency braking of the trolley body, it releases the position restriction of the moving part through inertial movement and cooperates with the power storage module, so that the moving part rises instantaneously and the brake block makes full contact with the track.

9. The workpiece transfer trolley of the aluminum-steel welding production line according to claim 8, characterized in that: The guide assembly includes two symmetrically horizontally rotating guide wheels that are positioned at the end of the moving part facing the track. When the mounting plate is installed on the trolley body, the two guide wheels make rolling contact with the vertical surface of the track.

10. The workpiece transfer trolley of the aluminum-steel welding production line according to claim 9, characterized in that: The top surface of the moving part is vertically slidably equipped with a push plate that can be reset upwards. The lower end of the push plate is symmetrically and horizontally slidably equipped with two push blocks with arc surfaces on their outer sides that can be reset in the center. The arc surfaces of the two push blocks face the corresponding guide wheels. The top surface of the push plate is equipped with an extension plate parallel to the top surface of the brake block. When the push plate moves downwards, it can push the two push blocks to move to both sides and make full contact with the guide wheels.

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