A conveying device for a light-weight production line of automobile parts

Abstract

The application relates to the field of automobile part conveying, and particularly discloses a conveying device for a light-weight production line of automobile parts, which comprises a track, a self-propelled trolley and a hanger, the bottom of the hanger is provided with four hangers, a supporting box is rotationally arranged on the hangers, and two supporting rods are slidably arranged in the supporting box; a driving mechanism for driving the supporting rods to horizontally and / or vertically move is arranged on the supporting box. The application has the effect of achieving the uniformity of the front and rear ends of the hanger by changing the relative positions of the front supporting rod and the rear supporting rod and the transposition support of the two.

Description

Technical Field

[0001] This application relates to the field of automotive parts conveying, and in particular to a conveying device for a lightweight automotive parts production line. Background Technology

[0002] Automotive parts, also known as automotive accessories, automotive spare parts, or automotive components, refer to the components that make up the various units of a vehicle and all consumable materials that serve the vehicle.

[0003] In automobile manufacturing, various body structural components, chassis parts, and related assemblies typically require sequential welding, grinding, painting, and assembly. In new energy vehicles, the assembly of components such as the chassis, suspension system, and battery pack usually employs a superstructure approach. The body-in-white (the unpainted body without assemblies) is transported by a suspension conveyor, while components like the battery pack are assembled from below the body-in-white upwards. The suspension conveyor typically consists of several self-propelled trolleys sliding on tracks, each suspending a frame. Four booms rotate beneath the frame, with support rods on these booms providing support at four points on the vehicle body.

[0004] With the increasing demand for lightweight vehicles, especially new energy vehicles dealing with heavy battery packs, the need for lightweight vehicle bodies is even more urgent. Simultaneously, the requirements for transport stability on production lines are also increasing. Before assembly, new energy vehicles are in a body-in-white state, with a relatively light overall weight. Due to the reinforced A-pillar structure and the extended front bulkhead and front longitudinal beams, the center of gravity is usually biased towards the front of the vehicle. However, after the battery pack, suspension system, rear floor assembly, subframe, and other components are assembled, the overall vehicle weight increases significantly. The battery pack, in particular, is enormous and its installation position is usually slightly rearward from the center of the vehicle floor, causing the center of gravity to shift from the front to the center or slightly rearward. At this point, to ensure transport stability and address the mismatch between the support points and the center of gravity, the strength of the mounting brackets needs to be strengthened.

[0005] Regarding the aforementioned technologies, the inventors believe that the following defects exist: strengthening the bracket requires additional thickening and thickening of the bracket to cope with the changes in the center of gravity of the vehicle body before and after the superstructure, resulting in slower conveying speed and higher conveying energy consumption. It is also necessary to increase the strength of the track to cope with the additional weight of all the brackets. Furthermore, the uneven distribution of the front and rear loads of the brackets will exacerbate the wear of the rubber wheels of the self-propelled vehicle to varying degrees. Summary of the Invention

[0006] To improve the problem of uneven loading at the front and rear ends of the upper body's front and rear brackets, this application provides a conveying device for a lightweight production line for automotive parts.

[0007] The conveying device for a lightweight production line of automotive parts provided in this application adopts the following technical solution: A conveying device for a lightweight automotive parts production line includes a track, a self-propelled trolley, and a bracket. The bracket has four suspension rods at its bottom, and a support box is rotatably mounted on each suspension rod. Two support rods are slidably mounted inside the support box. The support box is equipped with a drive mechanism for driving the support rods to move horizontally and / or vertically.

[0008] Optionally, the driving mechanism includes a power component disposed on the support box, a driving block slidably disposed in the support box in a horizontal direction, a receiving block rotatably and slidably connected in the support box, a limiting cylinder sleeved on the support rod, and a limiting component for limiting the movement range of the receiving block. The power component is used to drive the driving block to move horizontally. The support rod, the driving block, and the receiving block in one support box correspond one-to-one. The side of the driving block near the receiving block has an inclined plane that gradually moves away from low to high. The support rod is rotatably connected to the receiving block, and the limiting cylinder is slidably disposed in the support box in a horizontal direction.

[0009] Optionally, the driving block is frustum-shaped, and the two opposite sides of the driving block along the vertical direction are right trapezoids. The upper and lower bases of the driving block are both horizontally arranged. The receiving block is also provided with a horizontal part, and the horizontal part of the receiving block fits and matches the upper base of the driving block.

[0010] Optionally, the limiting member includes a connecting block and a separating block disposed within the support box. The connecting block is located on one side of the inclined surface of the driving block, and the separating block is located on the other side. The height of the separating block is higher than that of the driving block and lower than that of the receiving block.

[0011] Optionally, a lever is elastically rotatably mounted within the horizontal portion of the receiving block. One end of the lever is fixedly connected to a locking block. The driving block has a slot that is adapted to be inserted into the locking block. The receiving block has a separation groove that is adapted to be inserted into the separation block at one end near the separating block. When the driving block and the receiving block are in contact and the lever is in a free state, the locking block is inserted into the slot, and at this time, the end of the locking block away from the separating block is a vertical surface. When the separating block is inserted into the separation groove and presses against the end of the lever away from the locking block, the locking block separates from the slot.

[0012] Optionally, a lead screw is rotatably connected inside the support box, the lead screw thread passes through the connecting block, and the lead screw and the connecting block correspond one-to-one.

[0013] Optionally, the power component is a hydraulic cylinder mounted on the support box and corresponding to the drive block, with the output end of the hydraulic cylinder fixedly connected to the drive block.

[0014] In summary, this application includes at least one of the following beneficial technical effects: 1. When the body-in-white is transported to the superstructure station, the drive mechanism controls the rear support rod to move to a position corresponding to the center of gravity of the body after the superstructure is completed. Then, the drive mechanism controls the rear support rod to rise to abut against the body-in-white, and then lowers the front support rod to separate the front support rod from the body-in-white. This reduces the actual load difference between the front and rear self-propelled trolleys during the subsequent superstructure process and the transport process after the superstructure is completed. That is, by changing the relative position between the front and rear support rods and their interchangeable support, the uniformity of the front and rear loads of the superstructure's front and rear balance brackets is achieved. 2. The support rod is raised and lowered by the connecting block and the separating block. The position of the connecting block is adjusted by rotating the screw, thereby adjusting the position of the support rod and changing the position of the support rod supporting the longitudinal beam of the vehicle body. The raising, lowering and leveling process of the support rod is relatively simple and stable, the structure is also relatively simple, and maintenance is convenient. 3. When the drive block and the receiving block are pressed together, the lever, under the influence of elasticity, causes the locking block to insert into the slot. At this time, due to the insertion action of the locking block and the slot, the drive block and the receiving block are locked together, preventing relative sliding between the drive block and the receiving block when the front support rod of the bracket supports the vehicle body for starting / acceleration or when the rear support rod of the bracket needs to decelerate / brake. When the receiving block and the separating block are pressed together, the separating block is inserted into the separating groove, and the separating block pushes the lever away from the locking block, making the lever horizontal and separating the locking block from the slot. This achieves separation between the receiving block and the drive block before the support rod begins to descend. 4. Each hydraulic cylinder independently controls the operation of each drive block, resulting in a simple structure and multiple control methods. The hydraulic cylinders are horizontally positioned below the support box, and the combined thickness of the cylinders and the support box is within the operating range of the upper structure, minimizing obstruction to the operator / robotic arm's space. Simultaneously, when the vehicle body moves to the next processing station and needs to decelerate / accelerate, the drive block corresponding to the support rod currently in a supported state also moves slightly to achieve an active buffering effect. Specifically, when the vehicle body accelerates, the drive block moves backward; when the vehicle body decelerates, the drive block moves forward. At the same time, the drive block corresponding to the support rod to be replaced also moves to a position close to the designated location, facilitating rapid repositioning of the support rods after the vehicle body comes to a complete stop. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle; Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure; Figure 4 yes Figure 3 Enlarged diagram of part B.

[0016] Reference numerals: 11. Track; 12. Self-propelled trolley; 13. Hanger; 14. Hanger rod; 21. Support box; 22. Support rod; 3. Drive mechanism; 31. Power component; 32. Drive block; 33. Receiving block; 34. Limiting cylinder; 35. Limiting component; 351. Connecting block; 352. Separating block; 41. Lever; 42. Locking block; 43. Locking groove; 44. Separating groove; 5. Lead screw. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0018] This application discloses a conveying device for a lightweight production line for automotive parts. (Refer to...) Figures 1-3 The conveying device for the lightweight production line of automotive parts includes a track 11, a self-propelled trolley 12, and a bracket 13. In this application, one bracket 13 corresponds to two self-propelled trolleys 12, so that the two self-propelled trolleys 12 are rotatably connected to the front and rear ends of the bracket 13 respectively. Four suspension rods 14 are provided at the bottom of the bracket 13. A support box 21 is rotatably mounted on the suspension rods 14. The rotation of the support box 21 can be controlled by setting a drive shaft in the suspension rods 14, installing a motor on the bracket 13 and connecting the output end of the motor to the drive shaft. Alternatively, a motor can be installed on each suspension rod 14, so that the motor drives the support box 21 to rotate through a transmission structure. The methods of achieving this function are all existing technologies and will not be described in detail here. Two support rods 22 are slidably arranged in the support box 21. A drive mechanism 3 is provided on the support box 21 for driving the support rods 22 to move horizontally and / or vertically.

[0019] Before the hanger 13 reaches the car body conveying station, the support boxes 21 are all rotated to the outside of the hanger 13 and away from the direction of the suspended car body. When the self-propelled trolley 12 drives the hanger 13 to move along the track 11 to the car body, the self-propelled trolley 12 stops, and the support boxes 21 rotate to the underside of the car body. The drive mechanism 3 moves the support rods 22 in each support box 21 that are close to the front wheel of the car body (for ease of description, the support rods 22 in the same support box 21 that are close to the front wheel of the car body are called front support rods 22, and the support rods 22 that are close to the rear wheel of the car body are called rear support rods 22). The four front support rods 22 are moved horizontally to the corresponding positions. Then, the drive mechanism 3 raises the front support rods 22, so that the front support rods 22 support the car body by supporting the longitudinal beam of the car body. At this time, the center of gravity of the car body is close to the midpoint of the line connecting the four front support rods 22, that is, the stress on the four front support rods 22 is similar, so that the load weight of the front and rear trolleys is equal. When the body-in-white is transported to the superstructure station, the drive mechanism 3 controls the rear support rod 22 to move to a position corresponding to the center of gravity of the body after the superstructure is completed. Then, the drive mechanism 3 controls the rear support rod 22 to rise to abut against the body-in-white, and then lowers the front support rod 22 to separate the front support rod 22 from the body-in-white. This reduces the actual load difference between the front and rear self-propelled trolleys 12 during the subsequent superstructure process and the transport process after the superstructure is completed. That is, by changing the relative position between the front support rod 22 and the rear support rod 22 and their interchangeable support, the uniformity of the front and rear loads of the superstructure front and rear balance brackets 13 is achieved.

[0020] Reference Figure 2 and Figure 3 The driving mechanism 3 includes a power component 31 mounted on the support box 21, a driving block 32 that slides horizontally within the support box 21, a receiving block 33 that rotates and slides within the support box 21, a limiting cylinder 34 sleeved on the support rod 22, and a limiting component 35 for limiting the movement range of the receiving block 33. The power component 31 drives the driving block 32 to move horizontally. The support rod 22, driving block 32, and receiving block 33 within the support box 21 correspond one-to-one. The side of the driving block 32 closest to the receiving block 33 is an inclined plane that gradually moves away from the bottom. The support rod 22 is rotatably connected to the receiving block 33. The limiting cylinder 34 slides horizontally within the support box 21. The driving block 32 is frustum-shaped. The two opposite sides of the driving block 32 in the vertical direction are right trapezoids. The upper and lower bottoms of the driving block 32 are both horizontally positioned. The receiving block 33 also has a horizontal part, and the horizontal part of the receiving block 33 fits snugly against the upper bottom of the driving block 32.

[0021] When the support rod 22 needs to move horizontally and then rise, the power component 31 drives the drive block 32 to move closer to the receiving block 33, so that the drive block 32 pushes the receiving block 33 to move synchronously. When the receiving block 33 moves to the designated position, the power component 31 continues to drive the drive block 32 to move. The limiting component 35 restricts the linear movement of the receiving block 33. At this time, due to the action of the inclined surface of the drive block 32, the receiving block 33 is pushed to flip. And due to the limiting cylinder 34 restricting the support rod 22 from flipping, the support rod 22 moves upward until the upper bottom of the drive block 32 abuts against the horizontal part of the receiving block 33. When it is necessary to control the support rod 22 to move horizontally first and then descend, the power component 31 drives the drive block 32 to move away from the receiving block 33. At this time, since the upper bottom of the drive block 32 is pressed against the horizontal part of the receiving block 33, the receiving block 33 continues to move with the drive block 32 due to friction, thereby causing the support rod 22 and the vehicle body to move horizontally. When the support rod 22 needs to descend, the power component 31 drives the drive block 32 to continue to move in the direction of separating from the receiving block 33. At this time, the limiting component 35 restricts the horizontal movement of the receiving block 33, thereby causing the drive block 32 and the receiving block 33 to gradually separate. The receiving block 33 flips downward due to the heavier weight of the support rod 22, thereby causing the support rod 22 to descend. The whole process has a simple structure, few transmission mechanisms, and is relatively easy to maintain.

[0022] Reference Figure 2 and Figure 3 The limiting component 35 includes a connecting block 351 and a separating block 352 disposed within the support box 21. The connecting block 351 is located on one side of the inclined surface of the driving block 32, and the separating block 352 is located on the other side. The height of the separating block 352 is higher than that of the driving block 32 and lower than that of the receiving block 33. A lead screw 5 is rotatably connected within the support box 21. The lead screw 5 is threaded through the connecting block 351, and the lead screw 5 corresponds one-to-one with the connecting block 351. The lead screw 5 can be installed only on the connecting block 351 corresponding to the front support rod 22, or only on the connecting block 351 corresponding to the right support rod 22, or on both connecting blocks 351 within the same support box 21. In this application, only one connecting block 351 is provided within one support box 21, that is, the two receiving blocks 33 share one connecting block 351. All of the above methods can achieve the function of adjusting the relative position of the two support rods 22 when they are supported, but the adjustment range is different, and can be selected according to the actual working conditions.

[0023] When the upper bottom of the drive block 32 is not tightly against the horizontal part of the receiving block 33, the drive block 32 drives the receiving block 33 to move until it is tightly against the connecting block 351 and continues to move closer to the connecting block 351. The connecting block 351 then blocks the receiving block 33 from continuing to move horizontally, thereby causing the inclined surface of the drive block 32 to cause the receiving block 33 to flip. Conversely, when the upper bottom of the drive block 32 is tightly against the horizontal part of the receiving block 33, the drive block 32 drives the receiving block 33 to move towards the separating block 352. When the receiving block 33 is tightly against the separating block 352, the drive block 32 cannot drive the receiving block 33 to move horizontally. As the drive block 32 continues to move, the relative position between the receiving block 33 and the drive block 32 gradually separates until the horizontal part of the receiving block 33 abuts against the inclined surface of the drive block 32. At this point, the receiving block 33 gradually descends along the inclined surface of the drive block 32. In other words, the lifting and horizontal movement of the support rod 22 is relatively simple and stable, the structure is relatively simple, and maintenance is convenient. Furthermore, when it is necessary to transport other models of car bodies and change the support position of the support rod 22, the position of the connecting block 351 can be adjusted by rotating the lead screw 5, thereby adjusting the rising position of the support rod 22 and thus changing the position of the support rod 22 supporting the longitudinal beam of the car body.

[0024] Reference Figure 3 and Figure 4 A lever 41 is elastically rotatably mounted inside the horizontal part of the receiving block 33. The elasticity of the lever 41 can be achieved by a torsion spring or a coil spring. One end of the lever 41 is fixedly connected to a locking block 42. The driving block 32 has a locking groove 43 that is adapted to be inserted into the locking block 42. The end of the receiving block 33 near the separating block 352 has a separating groove 44 that is adapted to be inserted into the separating block 352. When the driving block 32 is in contact with the receiving block 33 and the lever 41 is in a free state, the locking block 42 is inserted into the locking groove 43, and at this time the end of the locking block 42 away from the separating block 352 is a vertical surface. When the separating block 352 is inserted into the separating groove 44 and presses the end of the lever 41 away from the locking block 42, the locking block 42 is separated from the locking groove 43.

[0025] When the drive block 32 and the receiving block 33 are pressed together, the lever 41 is affected by the elastic force, causing the locking block 42 to insert into the slot 43. At this time, due to the insertion action of the locking block 42 and the slot 43, the drive block 32 and the receiving block 33 are locked together, preventing relative sliding between the drive block 32 and the receiving block 33 when the front support rod 22 of the bracket 13 supports the vehicle body for starting / acceleration or when the rear support rod 22 of the bracket 13 needs to decelerate / stop. When the receiving block 33 abuts against the separating block 352, the separating block 352 is inserted into the separating groove 44, and the separating block 352 pushes the lever 41 away from the end of the locking block 42, so that the lever 41 is in a horizontal state, and the locking block 42 is separated from the slot 43, thereby completing the separation between the receiving block 33 and the drive block 32 before the support rod 22 begins to descend.

[0026] Reference Figure 2 and Figure 3 The power component 31 is a hydraulic cylinder mounted on the support box 21, corresponding to the drive block 32. The output end of the hydraulic cylinder is fixedly connected to the drive block 32. Each hydraulic cylinder independently controls the operation of each drive block 32, resulting in a simple structure and multiple control methods. It eliminates the need for numerous transmission components to perform complex transmission from a single power source to multiple drive blocks 32. Furthermore, when the vehicle body moves to the next processing station and needs to decelerate / accelerate, the drive block 32 corresponding to the support rod 22, which is currently in a supported state, also moves slightly in sync to achieve an active buffering effect. Specifically, when the vehicle body accelerates, the drive block 32 moves backward; when the vehicle body decelerates, the drive block 32 moves forward. At the same time, the drive block 32 corresponding to the support rod 22 that is about to be replaced also moves to a position close to the designated location, so that the support rods 22 can quickly switch positions after the vehicle body comes to a stop.

[0027] The implementation principle of the conveying device for a lightweight automotive parts production line according to this application embodiment is as follows: Before supporting the body-in-white, the position of the connecting block 351 is adjusted by rotating the lead screw 5 to adjust the rising position of the support rod 22. Then, the hydraulic cylinder drives the drive block 32 corresponding to the front support rod 22 to move towards the receiving block 33, so that the drive block 32 pushes the receiving block 33 to move synchronously. When the receiving block 33 moves to the designated position, the hydraulic cylinder continues to drive the drive block 32 to move. The connecting block 351 blocks the receiving block 33 from continuing to move horizontally, thereby causing the inclined surface of the drive block 32 to drive the receiving block 33 to flip, thereby causing the support rod 22 to move upward until the upper bottom of the drive block 32 abuts against the horizontal part of the receiving block 33. At this time, the body-in-white is supported by the front support rod 22, and the lever 41 is affected by the elastic force, causing the locking block 42 to be inserted into the locking groove 43, thereby locking the drive block 32 and the receiving block 33.

[0028] When the vehicle body needs to slow down before reaching the superstructure station, the front support rod 22 is moved horizontally forward by a hydraulic cylinder, and the rear support rod 22 is also moved horizontally forward at the same time. The relative position between the two is determined by the front and rear center of gravity of the superstructure on the white vehicle body. When the rear support rod 22 moves to the designated position, the hydraulic cylinder continues to drive the drive block 32 to move. The drive block 32 flips due to the obstruction of the connecting block 351, thereby causing the rear support rod 22 to rise to support the vehicle body. Then, the hydraulic cylinder corresponding to the front support rod 22 drives the front drive block 32 corresponding to it to move. The receiving block 33 stops moving due to the action of the separating block 352, thereby causing the drive block 32 and the receiving block 33 to gradually separate. The receiving block 33 flips downward due to the greater weight of the support rod 22 end, thereby causing the support rod 22 to descend until it loses its support for the vehicle body, thus completing the exchange support between the front support rod 22 and the rear support rod 22. This reduces the actual load difference between the front and rear self-propelled trolleys 12 during the subsequent loading process and the transportation process after loading is completed. Specifically, by changing the relative position between the front support rod 22 and the rear support rod 22 and their interchangeable support, the uniformity of the load on the front and rear ends of the front and rear balance brackets 13 of the upper structure is achieved.

[0029] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A conveying device for a lightweight production line for automotive parts, characterized in that: Includes a track (11), a self-propelled trolley (12), and a hanger (13). The hanger (13) has four hanging rods (14) at its bottom. A support box (21) is rotatably mounted on the hanging rods (14). Two support rods (22) are slidably mounted inside the support box (21). The support box (21) is equipped with a drive mechanism (3) for driving the support rods (22) to move horizontally and / or vertically. The driving mechanism (3) includes a power component (31) disposed on the support box (21), a driving block (32) slidably disposed in the support box (21) in the horizontal direction, a receiving block (33) rotatably and slidably connected in the support box (21), a limiting cylinder (34) sleeved on the support rod (22), and a limiting component (35) for limiting the movement range of the receiving block (33). The power component (31) is used to drive the driving block (32) to move horizontally. The support rod (22), the driving block (32), and the receiving block (33) in the support box (21) correspond one-to-one. The side of the driving block (32) close to the receiving block (33) is an inclined plane that gradually moves away from low to high. The support rod (22) is rotatably connected to the receiving block (33). The limiting cylinder (34) is slidably disposed in the support box (21) in the horizontal direction. The driving block (32) is truncated pyramidal in shape. The two opposite sides of the driving block (32) along the vertical direction are right trapezoidal. The upper and lower bases of the driving block (32) are both horizontally arranged. The receiving block (33) is also provided with a horizontal part. The horizontal part of the receiving block (33) is in close contact with the upper base of the driving block (32). The limiting member (35) includes a connecting block (351) and a separating block (352) disposed in the support box (21). The connecting block (351) is located on one side of the inclined surface of the driving block (32), and the separating block (352) is located on the other side. The height of the separating block (352) is higher than that of the driving block (32) and lower than that of the receiving block (33). The receiving block (33) has a lever (41) that is elastically rotatable in the horizontal part. One end of the lever (41) is fixedly connected to a locking block (42). The driving block (32) has a locking groove (43) that is compatible with the locking block (42). The receiving block (33) has a separation groove (44) that is compatible with the separation block (352) at one end. When the driving block (32) is in contact with the receiving block (33) and the lever (41) is in a free state, the locking block (42) is inserted into the locking groove (43). At this time, the end of the locking block (42) away from the separation block (352) is a vertical surface. When the separation block (352) is inserted into the separation groove (44) and presses the end of the lever (41) away from the locking block (42), the locking block (42) is separated from the locking groove (43).

2. The conveying device for a lightweight automotive parts production line according to claim 1, characterized in that: The support box (21) is rotatably connected to a lead screw (5), which is threaded through the connecting block (351). The lead screw (5) and the connecting block (351) are also in one-to-one correspondence.

3. The conveying device for a lightweight automotive parts production line according to claim 1, characterized in that: The power component (31) is a hydraulic cylinder that is mounted on the support box (21) and corresponds to the drive block (32). The output end of the hydraulic cylinder is fixedly connected to the drive block (32).

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