Automobile cab floor assembly transfer hoist

Abstract

This invention relates to the field of automotive body manufacturing technology and discloses a lifting device for transferring automotive cab floor assemblies, including a main frame, a sliding frame, a fixed hook, a movable hook, two locking bolts, and a balance box. This invention has the following advantages and effects: Through the structural design of the gravity hammer, adjusting components, and transmission device, this invention enables the potential energy storage device to drive the lead screw to rotate when the lifting device is tilted, adjusting the position of the counterweight to reduce the tilt angle of the lifting device, thereby reducing the risk of the automotive cab floor assembly falling due to tilting and improving the safety of lifting. This invention does not require the addition of motors, sensors, power supply devices, etc., and achieves the adjustment of the counterweight position mechanically, resulting in high reliability. Upgrading existing lifting devices simply involves adding a balance box, making the modification difficult and easy to promote and apply. This invention is used for lifting and transporting automotive cab floor assemblies, including those for new energy vehicles, with high safety.

Description

Technical Field

[0001] This invention relates to the field of automobile body manufacturing technology, and in particular to a transfer hoist for automobile cab floor assembly. Background Technology

[0002] The cab is an important component of the body of trucks and special vehicles, and is where the driver works. Trucks, especially new energy vehicles, generally use a thin-shell metal structure for their cabs. During the manufacturing process, the cab floor assembly needs to be transferred between various processes according to production needs, and lifting equipment is commonly used.

[0003] Existing technologies contain numerous literatures disclosing lifting device solutions. However, when lifting large, irregularly shaped parts such as automobile cab floor assemblies, the uneven mass distribution of the lifting device and the part can easily lead to tilting during lifting, potentially causing the part to detach and posing a safety hazard. For example, Chinese invention patent CN104444786B discloses a self-balancing lifting device, comprising a lifting device body, four legs, four lifting lugs, a balance sensor, two motors, two gearboxes, a bracket, two screws, and two nuts. The four legs are fixed to the lower sides of the crane body, and the four lifting lugs are evenly distributed on the upper side of the lifting device body. The balance sensor is located at both ends of the bracket, and the two screws are horizontally mounted on the bracket and driven by the gearboxes, which are in turn driven by the motors. The nuts are mounted on the screws and threadedly connected to them. The balance sensor detects the balance of the lifting device during lifting. When the center of gravity of the lifting device shifts, the motor drives the gearboxes to control the sliding of the nuts, thereby readjusting the center of gravity of the lifting device and restoring balance. This achieves automatic balancing and improves the safety of the lifting device.

[0004] The technologies represented by the aforementioned patents, which control the center of gravity through sensors and actuators, have the following problems: sensors may drift at high temperatures, and accumulated dust in the production workshop can interfere with sensor progress, resulting in certain reliability issues. Installing structures such as motors significantly increases the overall weight of the lifting device. Furthermore, powering the lifting device increases system complexity, especially in the retrofitting of older devices, where providing power to a device that performs both lifting and translational movements leads to high retrofitting costs. Summary of the Invention

[0005] The purpose of this invention is to provide a lifting device for transporting the vehicle cab floor assembly, which has the functions of lifting the vehicle cab floor assembly, automatically adjusting the position of the counterweight to adjust the overall center of gravity of the lifting device and the vehicle cab floor assembly, and improving the safety of lifting.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a transfer hoist for automobile cab floor assembly, comprising...

[0007] The main frame is equipped with a lifting ring structure;

[0008] A sliding frame is slidably connected to the main frame, and the main frame is provided with locking bolts for locking the position of the sliding frame;

[0009] Two fixing hooks are fixed to the main frame.

[0010] A movable hook, which is hinged to the sliding frame;

[0011] A balance box is installed and fixed on the main frame. Inside the balance box are a counterweight, a lead screw rotatably connected to both ends inside the balance box, a nut assembly installed on the lead screw, a gravity hammer, and two potential energy storage devices. The gravity hammer is hinged inside the balance box. The two potential energy storage devices are distributed on both sides of the gravity hammer. A transmission device for transmitting power is installed between each potential energy storage device and the lead screw. An adjusting component is provided between the gravity hammer and the two transmission devices. When the main frame is tilted, the adjusting component is used to connect the power transmission of the transmission device corresponding to the lower potential energy storage device, so as to drive the lead screw to rotate and move the counterweight.

[0012] Furthermore, two brackets are fixed inside the balance box, and the two potential energy storage devices are respectively installed on the two brackets. The transmission device includes a transmission shaft rotatably connected to the bracket, a one-way bearing installed on the transmission shaft, a gear one installed on the outer ring of the one-way bearing, and a gear two installed on the lead screw. The gear one and the gear two mesh with each other, and the locking rotation directions of the two one-way bearings in the two transmission devices are opposite.

[0013] Furthermore, two brackets are fixed to the inner wall of the balance box. The adjusting component includes ratchet for fixing the two drive shafts, stop pawls respectively hinged to the two brackets, springs for driving the stop pawls to engage with the ratchet, and adjusting rods fixed to the gravity hammer. The stop pawls are provided with adjusting surfaces for contacting the adjusting rods.

[0014] Furthermore, the two ends of the spring are respectively fixed to the stop pawl and the bracket two.

[0015] Furthermore, the gravity hammer includes a hammer body and a shaft fixed to the hammer body. A bracket three is fixed to the inner wall of the balance box. The shaft is mounted on the bracket three via a bearing. The adjusting rod is fixed to the shaft.

[0016] Furthermore, the potential energy storage device is a spring barrel, which is provided with an output shaft, and the output shaft is connected to the transmission shaft.

[0017] Furthermore, two horizontal guide rods are fixed inside the balance box, and the counterweight has two guide holes, through which the two guide rods pass respectively.

[0018] Furthermore, the lifting ring structure is provided with at least two hook positions, and the plurality of hook positions are distributed at intervals along the sliding direction of the sliding frame.

[0019] Furthermore, there are two movable hooks, and a reinforcing rod is fixed between the two movable hooks. The upper end of each movable hook is hinged to the sliding frame.

[0020] Furthermore, the locking bolt is threadedly connected to the main frame, and the sliding frame has a positioning hole for the locking bolt to be inserted.

[0021] The beneficial effects of this invention are:

[0022] 1. This invention, through the structural design of a gravity hammer, adjusting components, and a transmission device, enables the potential energy storage device to drive the lead screw to rotate when the lifting device is tilted, thereby adjusting the position of the counterweight to reduce the tilt angle of the lifting device, reducing the risk of the car cab floor assembly falling due to tilting, and improving the safety of lifting operations.

[0023] 2. This invention does not require the installation of motors, sensors, power supply devices, or other structural components. It achieves the adjustment of the counterweight position through mechanical means, which is highly reliable. The upgrade and modification of the original lifting device can be achieved simply by adding a balance box, which is easy to modify and promotes its application.

[0024] 3. This invention is used for hoisting the floor assembly of the driver's cab of new energy vehicles and other automobiles, and it is highly safe. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0026] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0027] Figure 3 This is a schematic diagram of the internal structure of the balance box of the present invention.

[0028] Figure 4 This is a schematic diagram showing the structural relationship between the transmission device, adjusting component, and gravity hammer of the present invention.

[0029] Figure 5 This is a schematic diagram of the adjusting component structure of the present invention.

[0030] In the diagram, 1. Main frame; 11. First longitudinal beam; 12. First crossbeam; 2. Sliding frame; 21. Positioning hole; 22. Second longitudinal beam; 23. Second crossbeam; 3. Fixed hook; 4. Movable hook; 41. Reinforcing rod; 5. Balance box; 51. Support 1; 52. Support 2; 53. Support 3; 54. Counterweight; 55. Guide rod; 56. Potential energy storage device; 57. Gravity hammer; 571. Hammer body; 572. Shaft; 58. Lead screw; 6. Transmission device; 61. Gear 1; 62. Gear 2; 63. Transmission shaft; 64. One-way bearing; 7. Adjusting component; 71. Ratchet; 72. Check pawl; 721. Adjusting surface; 73. Spring; 74. Adjusting rod; 8. Lifting ring structure; 81. Hook position; 9. Locking bolt. Detailed Implementation

[0031] Car cab floor assembly transfer lifting equipment, such as Figure 1 , Figure 2 As shown, the system includes a main frame 1, a sliding frame 2, a fixed hook 3, a movable hook 4, and two locking bolts 9. The main frame 1 includes two parallel first longitudinal beams 11 and three first transverse beams 12, with each transverse beam 12 fixed at both ends to the two first longitudinal beams 11. Each first longitudinal beam 11 has a slot. The sliding frame 2 includes two parallel second longitudinal beams 22 and two second transverse beams 23, with each second transverse beam 23 fixed at both ends to the two second longitudinal beams 22. The two second longitudinal beams 22 are inserted into their respective slots, allowing the sliding frame 2 to slide relative to the main frame 1. The two locking bolts 9 lock the sliding frame 2 in place on the main frame 1. Specifically, the locking bolts 9 are threaded onto the first longitudinal beams 11. The second longitudinal beams 22 have multiple positioning holes 21. When the locking bolts 9 are inserted into the positioning holes 21, the sliding frame 2 is locked in place. When the locking bolts 9 are disengaged from the positioning holes 21, the position of the sliding frame 2 can be adjusted. There are two fixed hooks 3, which are fixed to one of the first crossbeams 12, and two movable hooks 4, which are hinged to the second crossbeam 23. A reinforcing rod 41 is fixed between the two movable hooks 4. The fixed hooks 3 and movable hooks 4 are used to hook onto both sides of the vehicle cab floor assembly.

[0032] Workers can adjust the position of the sliding frame 2 to adjust the relative positions of the fixed hook 3 and the movable hook 4, enabling the lifting of vehicle cab floor assemblies of different sizes. Additionally, a lifting ring structure 8 is fixed to the main frame 1. The lifting ring structure 8 has two hook positions 81, which are at different heights and spaced apart along the sliding direction of the sliding frame 2. Depending on the center of gravity of the vehicle cab floor assemblies of different sizes being lifted, the lifting equipment hooks onto different hook positions 81.

[0033] like Figure 3 , Figure 4 , Figure 5As shown, a balance box 5 is fixed on the main frame 1. Inside the balance box 5 are a counterweight 54, two parallel guide rods 55, a lead screw 58, a nut assembly, a gravity hammer 57, and two potential energy storage devices 56. The guide rods 55 are fixed at both ends to the inner wall of the balance box 5. The counterweight 54 has two guide holes through which the two guide rods 55 pass. The lead screw 58 is mounted inside the balance box 5 at both ends via bearings and bearing seats, allowing it to rotate relative to the counterweight 54. The nut assembly is mounted on the lead screw 58 and is fixed to the counterweight 54. The rotation of the lead screw 58 causes the counterweight 54 to move.

[0034] The gravity pendulum 57 includes a pendulum body 571 and a shaft 572 fixed on the pendulum body 571. A support 3 53 is fixed inside the balance box 5, and the shaft 572 is mounted on the support 3 53 via bearings. Two potential energy storage devices 56 are two spring-loaded cylinders. Two supports 1 51 are fixed inside the balance box 5, and the two potential energy storage devices 56 are respectively mounted on the two supports 1 51. The two potential energy storage devices 56 are distributed on both sides of the gravity pendulum 57. A transmission device 6 for transmitting power is installed between each potential energy storage device 56 and the lead screw 58. An adjusting component 7 is installed between the gravity pendulum 57 and the two transmission devices 6. The function of the adjusting component 7 is: when the main frame 1 tilts, the adjusting component 7 is used to connect the power transmission of the transmission device 6 corresponding to the lower potential energy storage device 56, so as to drive the lead screw 58 to rotate and move the counterweight 54 to a higher position, thereby adjusting the center of gravity of the lifting device and the vehicle cab floor assembly as a whole, preventing excessive tilting of the lifting device and the vehicle cab floor assembly, and reducing safety hazards.

[0035] In this embodiment, the transmission device 6 includes a transmission shaft 63 rotatably connected to the bracket 51, a one-way bearing 64 mounted on the transmission shaft 63, a gear 61 mounted on the outer ring of the one-way bearing 64, and a gear 62 mounted on the lead screw 58. Gear 61 and gear 62 mesh with each other. The locking directions of the two one-way bearings 64 within the two transmission devices 6 are opposite. An output shaft is provided on the spring barrel and is connected to the transmission shaft 63.

[0036] In this embodiment, two brackets 52 are fixed to the inner wall of the balance box 5. The adjustment bracket includes a ratchet 71 with a height equal to that of the two drive shafts 63, a stop pawl hinged to the two brackets 52 respectively, a spring 73 for driving the stop pawl to engage with the ratchet 71, and an adjustment rod 74 fixed to the gravity hammer 57. The stop pawl has an adjustment surface 721 for contacting the adjustment rod 74. The two ends of the spring 73 are fixed to the stop pawl and the brackets 52 respectively. The adjustment rod 74 is fixed to the shaft 572.

[0037] Working principle: Fixed hook 3 and movable hook 4 hook onto both sides of the vehicle cab floor assembly. The hook of the lifting equipment hooks onto hook position 81, lifting the lifting device and the vehicle cab floor assembly as a whole. Due to the irregular shape of the vehicle cab floor assembly, the center of gravity of the vehicle cab floor assembly and the lifting device as a whole will not be directly below the hook position 81 where the hook is hooked, which will inevitably cause the lifting device and the vehicle cab floor assembly to tilt. When the tilt exceeds a certain limit, the main frame 1, sliding frame 2, and the vehicle cab floor assembly tilt and flip. The gravity hammer 57 will be suspended under the action of gravity. The adjusting rod 74 on the gravity hammer 57 will contact the adjusting surface 721 of the stop pawl located below and move the stop pawl away from the ratchet 71. At this time, the power of the spring box located below is transmitted to the lead screw 58 through the drive shaft 63, one-way bearing 64, gear one 61, and gear two 62, driving the lead screw 58 to rotate. The lead screw drives the counterweight 54 to move upward through the nut assembly to reduce the tilt angle of the main frame 1, sliding frame 2, and vehicle cab floor assembly. Then the adjusting rod 74 leaves the adjusting surface 721, and the check pawl 72 is driven by the spring force of the spring 73 to lock the drive shaft 63 again and disconnect the power transmission of the transmission device 6.

Claims

1. A transfer hoist for automobile cab floor assembly, characterized in that: include The main frame (1) is provided with a lifting ring structure (8). A sliding frame (2) is slidably connected to the main frame (1), and the main frame (1) is provided with a locking bolt (9) for locking the position of the sliding frame (2). Two fixing hooks (3) are fixed on the main frame (1). Movable hook (4), which is hinged to the sliding frame (2); A balance box (5) is installed and fixed on the main frame (1). The balance box (5) is provided with a counterweight (54), a lead screw (58) rotatably connected to the inside of the balance box (5) at both ends, a nut assembly installed on the lead screw (58), a gravity hammer (57), and two potential energy storage devices (56). The gravity hammer (57) is hinged inside the balance box (5). The two potential energy storage devices (56) are distributed on both sides of the gravity hammer (57). A transmission device (6) for transmitting power is installed between each potential energy storage device (56) and the lead screw (58). An adjustment member (7) is provided between the gravity hammer (57) and the two transmission devices (6). When the main frame (1) is flipped and tilted, the adjustment member (7) is used to connect the power transmission of the transmission device (6) corresponding to the potential energy storage device (56) located at the lower position, so as to drive the lead screw (58) to rotate and drive the counterweight (54) to move.

2. The automobile cab floor assembly transfer hoist according to claim 1, characterized in that: The balance box (5) has two fixed brackets (51), and the two potential energy storage devices are respectively installed on the two brackets (51). The transmission device (6) includes a transmission shaft (63) rotatably connected to the bracket (51), a one-way bearing (64) installed on the transmission shaft (63), a gear (61) installed on the outer ring of the one-way bearing (64), and a gear (62) installed on the lead screw (58). The gear (61) and the gear (62) mesh with each other, and the locking rotation directions of the two one-way bearings (64) in the two transmission devices (6) are opposite.

3. The automobile cab floor assembly transfer hoist according to claim 2, characterized in that: The inner wall of the balance box (5) is fixed with two brackets (52). The adjusting component (7) includes a ratchet (71) that fixes the two drive shafts (63), a stop pawl that is respectively hinged to the two brackets (52), a spring (73) for driving the stop pawl to lock in the ratchet (71), and an adjusting rod (74) fixed to the gravity hammer (57). The stop pawl is provided with an adjusting surface (721) for contacting the adjusting rod (74).

4. The automobile cab floor assembly transfer hoist according to claim 3, characterized in that: The two ends of the spring (73) are fixed to the stop claw and the bracket (52) respectively.

5. The automobile cab floor assembly transfer hoist according to claim 3, characterized in that: The gravity hammer (57) includes a hammer body (571) and a shaft (572) fixed to the hammer body (571). A bracket (53) is fixed to the inner wall of the balance box (5). The shaft (572) is mounted on the bracket (53) through a bearing. The adjusting rod (74) is fixed on the shaft (572).

6. The vehicle cab floor assembly transfer hoist according to claim 2, characterized in that: The potential energy storage device (56) is a spring barrel, which is provided with an output shaft, and the output shaft is connected to the transmission shaft (63).

7. The automobile cab floor assembly transfer hoist according to claim 1, characterized in that: The balance box (5) has two horizontal guide rods (55) fixed inside. The counterweight (54) has two guide holes, and the two guide rods (55) pass through the two guide holes respectively.

8. The automobile cab floor assembly transfer hoist according to claim 1, characterized in that: The lifting ring structure (8) is provided with at least two hook positions (81), and the multiple hook positions (81) are distributed at intervals along the sliding direction of the sliding frame (2).

9. The automobile cab floor assembly transfer hoist according to claim 1, characterized in that: There are two movable hooks (4), and a reinforcing rod (41) is fixed between the two movable hooks (4). The upper end of the movable hook (4) is hinged to the sliding frame (2).

10. The automobile cab floor assembly transfer hoist according to claim 1, characterized in that: The locking bolt (9) is threadedly connected to the main frame (1), and the sliding frame (2) has a positioning hole (21) for the locking bolt (9) to be inserted.

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