Cargo lifting system
By introducing a counterweight structure and braking device into the lifting system, combined with chain drive and positioning components, the stability and reliability issues of lifting devices in large workshops or warehouses have been solved, enabling reliable stopping and safe transport of the car.
Patent Information
- Application Number
- CN202423297415.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-30
AI Technical Summary
For workshops or warehouses with high ceilings and large cargo volumes, the stability and reliability of existing lifting devices are insufficient, especially in spaces up to 20 meters high, where the safety and reliability of the lifting devices are difficult to guarantee.
A cargo lifting system was designed, which adopts a counterweight structure and a braking device. The car is driven to rise and fall by chain drive. The counterweight structure descends under the action of gravity. The braking device locks the drive shaft after the car reaches the preset height. Combined with the positioning component, it ensures that the car stays stably.
The safety, reliability, and stability of the lifting device have been improved, ensuring that the car can reliably stop at the preset floor. The multiple self-locking functions of the lifting system have been enhanced, thereby improving the safety and reliability of the system.
Smart Images
Figure CN223547532U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hoisting technology, specifically to a cargo hoisting system. Background Technology
[0002] A hoist is a lifting device primarily used to lift goods or personnel to higher or lower positions. Hoists are widely used in production lines, warehouses, stations, airports, hospitals, shopping malls, and other locations. Cargo lifting devices are typically used in assembly workshops or warehouses, enabling the vertical transport of goods from the first floor to the second floor, increasing storage space and work efficiency.
[0003] However, for workshops with high ceilings and large cargo volumes, the lifting devices also need to be designed to be very high, especially in workshops and warehouses with ceilings as high as 20 meters. In such cases, the stability and reliability of the lifting devices are particularly important. Utility Model Content
[0004] In view of this, the present invention provides a cargo lifting system with higher safety and reliability.
[0005] To achieve the above objectives, the technical solution of this utility model is as follows:
[0006] A cargo lifting system includes a frame assembly, a car mounted on the frame assembly, and a drive device for driving the car to move up and down. The key features are: a counterweight structure is provided at the end of the frame assembly away from the car; a top support frame is fixedly mounted on the top of the frame assembly; the drive device includes a first drive shaft and a second drive shaft rotatably mounted on the top support frame, and a drive assembly for driving the first drive shaft to rotate; the first and second drive shafts are arranged in parallel; a third drive shaft is rotatably mounted at the end of the top support frame away from the first and second drive shafts; two sets of first sprockets are fixedly fitted at both ends of the second drive shaft; second sprockets are fixedly fitted at both ends of the first drive shaft; third sprockets are fixedly fitted at both ends of the third drive shaft; each of the four sets of first sprockets is equipped with a first chain; one end of each first chain is fixedly connected to the counterweight structure, and the other end is fixedly connected to the car via two sets of second sprockets and two sets of third sprockets, respectively.
[0007] The top support frame is equipped with a braking device, which is used to release or lock the first drive shaft.
[0008] With the above structure, the braking device releases the first drive shaft, and the drive assembly drives the first drive shaft to rotate. The second sprocket on the first drive shaft rotates, and under the transmission action of its corresponding first chain, it can drive the second and third sprockets to rotate. At this time, the rotation of the four sets of first chains can pull the car against gravity to rise to the upper part of the frame assembly. Simultaneously, the counterweight structure descends under the action of gravity, the drive assembly stops driving, the braking device locks the first drive shaft, and the car can stop at the height of the second shelf. Conversely, the drive assembly drives the first drive shaft to reverse, which can drive the car to descend to the bottom, returning to the height of the first shelf.
[0009] Preferably, the drive assembly includes a motor fixedly mounted on the top support frame, a fourth sprocket fixedly mounted on the motor output shaft, a fifth sprocket fixedly mounted on the first drive shaft, and the fourth and fifth sprockets being connected by a second chain drive.
[0010] Preferably, the first drive shaft, the second drive shaft, and the third drive shaft are all rotatably mounted on the top support frame via bearing mounting seats.
[0011] Preferably, the frame assembly includes four sets of upright structures and crossbar structures disposed between two adjacent sets of upright structures, and the four sets of upright structures and crossbar structures constitute a rectangular frame.
[0012] As a preferred embodiment, each of the pole structures described herein consists of four poles joined together.
[0013] Preferably, the crossbar structure includes side bars distributed between two adjacent sets of upright structures, with a guide rail mounting bracket fixedly mounted on the inner side of one side bar. Both ends of the guide rail mounting bracket are fixedly fitted with counterweight guide rails, which extend along the height direction of the frame assembly. The counterweight structure includes a counterweight frame and counterweight blocks disposed within the counterweight frame. Both ends of the counterweight frame are slidably engaged with the counterweight guide rails on both sides.
[0014] Preferably, the guide rail mounting bracket includes a parallel rod parallel to the side rod, with vertical sections fixed at both ends of the parallel rod. The end of the vertical section away from the parallel rod is fixedly connected to the side rod. The counterweight guide rail is located at the inner end of the vertical section. A set of car guide rails is installed on the outer side of the parallel rod and on the other side rod opposite to the parallel rod. Guide wheels that slide with the two sets of car guide rails are respectively provided on both sides of the car.
[0015] Preferably, a brake drum is fixedly sleeved on one end of the first drive shaft, and the braking device includes a base fixed on the top support frame, a pusher set on the base, and two sets of brake shoes located on both sides of the brake drum. The pusher is provided with a push rod that can move up and down, and a lever mechanism is connected between the push rod and the two sets of brake shoes.
[0016] The pusher pushes the push rod upward, and under the transmission action of the lever mechanism, it can force the two sets of brake shoes away from the brake drum; the push rod moves downward, and under the transmission action of the lever mechanism, it can make the two sets of brake shoes hug the brake drum.
[0017] Preferably, a positioning component is provided between the car and the frame assembly, the positioning component being used to lock the car in a preset stopping position within the frame assembly.
[0018] Preferably, the positioning component includes an electric cylinder disposed on the top of the car, a positioning pin driven to move by the electric cylinder, and a positioning block fixed inside the frame assembly. The positioning block is provided with a connecting through hole. When the car reaches a preset floor, the electric cylinder drives the positioning pin to move toward the positioning block and through the connecting through hole.
[0019] Compared with the prior art, the beneficial effects of this utility model are:
[0020] 1. The cargo lifting system provided by this utility model releases the first drive shaft via a braking device, and the drive assembly drives the first drive shaft to rotate. The second sprocket on the first drive shaft rotates, and under the transmission action of its corresponding first chain, it can drive the second and third sprockets to rotate. At this time, the rotation of the four sets of first chains can pull the car up against gravity to the upper part of the frame assembly. Simultaneously, the counterweight structure descends under the action of gravity, the drive assembly stops driving, the braking device locks the first drive shaft, and the car can stop at the height of the second shelf. Conversely, the drive assembly drives the first drive shaft to reverse, which can drive the car down to the bottom, returning to the height of the first shelf. By adding a braking device, the reliability of the car's braking can be ensured, allowing the car to stably stop at the preset floor.
[0021] 2. The cargo lifting system provided by this utility model, by setting up positioning components and braking devices, provides multiple self-locking functions for the car, and has the technical advantages of strong stability and high safety and reliability. Attached Figure Description
[0022] Figure 1 A reference diagram showing the operational status of a cargo lifting system;
[0023] Figure 2 This is a schematic diagram of the cargo lifting system.
[0024] Figure 3 This is a schematic diagram showing the top structure of the cargo lifting system;
[0025] Figure 4 A schematic diagram illustrating the drive unit C in the cargo lifting system;
[0026] Figure 5 This is a schematic diagram illustrating the superstructure of the cargo lifting system;
[0027] Figure 6 A schematic diagram illustrating the connection between the counterweight structure D and the guide rail mounting bracket 3;
[0028] Figure 7 This is a schematic diagram illustrating the lower structure of the cargo lifting system;
[0029] Figure 8 This is a magnified view of a portion of the positioning component F;
[0030] Figure 9 This is a partial enlarged view of the braking device E. Detailed Implementation
[0031] The present invention will be further described below with reference to the embodiments and accompanying drawings.
[0032] like Figure 2 As shown, a cargo lifting system includes a frame assembly A, a car B that is liftably mounted within the frame assembly A, and a drive device C for driving the car B to move up and down. The car B is used to carry and transport goods. A counterweight structure D is provided at the end of the frame assembly A away from the car B. A top support frame 1 is fixed to the top of the frame assembly A, combined with... Figure 3 and 4 As shown, the drive unit C includes a first drive shaft C3 and a second drive shaft C4 rotatably mounted on the top support frame 1, and a drive assembly for driving the first drive shaft C3 to rotate. The first drive shaft C3 and the second drive shaft C4 are located at the left end of the top support frame 1 and are arranged in parallel. A third drive shaft C5 is rotatably mounted on the top support frame 1 at the end away from the first drive shaft C3 and the second drive shaft C4 (i.e., the right end of the top support frame 1). The third drive shaft C5 is arranged in parallel with the first drive shaft C3, and the first drive shaft C3 and the third drive shaft C5 correspond to the left and right ends of the top of the car B, respectively. Two sets of first sprockets C7 are fixedly fitted at both ends of the second drive shaft C4; two sets of second sprockets C8 are fixedly fitted at both ends of the first drive shaft C3; and three sets of third sprockets C9 are fixedly fitted at both ends of the third drive shaft C5. Each of the four sets of first sprockets C7 is equipped with a first chain C10. One end of each first chain C10 is fixedly connected to the counterweight structure D, and the other end is fixedly connected to the car B via two sets of second sprockets C8 and two sets of third sprockets C9, respectively (see reference). Figure 7 That is, the other ends of the four sets of first sprockets C7 are respectively connected to the four corners of the top of the car B. A braking device E is provided on the top support frame 1, which is used to release or lock the first drive shaft C3. In this embodiment, each first chain C10 is a double-row chain, which can improve load-bearing capacity and service life, and ensure the stability of the chain drive.
[0033] Based on the above structural design, and referring to Figure 1 The cargo lifting system provided in this embodiment is a double-layer cargo lifting system, which is applied in a double-layer warehouse or workshop G, and can transport goods from the first-layer shelf G1 to the second-layer shelf G2. Specifically, in the initial state, the car B is located at the bottom of the frame assembly A, the counterweight structure D is located at the top of the frame assembly A, the braking device E releases the first drive shaft C3, the drive assembly drives the first drive shaft C3 to rotate, the second sprocket C8 on the first drive shaft C3 rotates, and under the transmission action of the corresponding first chain C10, it can drive the second sprocket C8 and the third sprocket C9 to rotate. At this time, the rotation of the four sets of first chains C10 can pull the car B to rise against gravity to the top of the frame assembly A. At the same time, the counterweight structure D descends under the action of gravity, the drive assembly stops driving, the braking device E locks the first drive shaft C3, and the car B can stay at the height of the second-layer shelf G2. Conversely, the drive assembly drives the first drive shaft C3 to reverse, that is, it can drive the car B to descend to the bottom, back to the height of the first-layer shelf G1. By adding braking device E, the reliability of car B's braking can be ensured, allowing car B to remain stably on the first and second floors.
[0034] Furthermore, for example Figure 4 As shown, the drive assembly includes a motor C1 fixedly mounted on the top support frame 1 and a fourth sprocket C2 fixedly mounted on the output shaft of the motor C1. A fifth sprocket C6 is fixedly mounted on the first drive shaft C3. The fourth sprocket C2 and the fifth sprocket C6 are connected by a second chain (not shown in the figure). The motor C1 drives the fourth sprocket C2 to rotate, which in turn drives the first drive shaft C3 to rotate under the transmission action of the second chain and the fifth sprocket C6. When the car B reaches the preset height, the output shaft of the motor C1 stops rotating. The self-locking action of the sprocket and the chain also ensures the reliability of the car B's stopping.
[0035] Please refer to Figure 4 Bearing mounting seats 2 are fixedly installed on the top support frame 1 at the positions corresponding to the two ends of the first drive shaft C3, the two ends of the second drive shaft C4, and the two ends of the third drive shaft C5. The two ends of the first drive shaft C3, the second drive shaft C4, and the third drive shaft C5 are rotatably assembled on the corresponding bearing mounting seats 2.
[0036] like Figure 2 As shown, the frame assembly A includes four sets of upright structures A1, with a crossbar structure A2 between each pair of adjacent sets of upright structures A1. The four sets of upright structures A1 and the crossbar structures A2 form a rectangular frame, allowing the car B and the counterweight structure D to move up and down within the rectangular frame. This design improves the stability of the frame assembly A.
[0037] Revisit Figure 2Each set of upright structures A1 is composed of four uprights A11 connected together. In this embodiment, the uprights A11 are square tubes. This design makes the structure of the frame assembly A more stable, improving the safety and reliability of the cargo lifting system.
[0038] Reference Figure 2 The crossbar structure A2 includes several side bars A21 distributed between two adjacent sets of upright structures A1. In this embodiment, the side bars A21 are symmetrically arranged in the two opposing sets of crossbar structures A2, that is, the left side bar A21 and the right side bar A21 are symmetrically arranged, and the front side bar A21 and the rear side bar A21 are symmetrically arranged. In the two adjacent sets of crossbar structures A2, the side bars A21 are staggered vertically. Figure 5 and Figure 6 As can be seen, in the left crossbar structure A2, a guide rail mounting bracket 3 is fixedly installed on the inner side of the side bar A21. The guide rail mounting bracket 3 can be spaced apart, or it can be installed on the inner side of each side bar A21. A counterweight guide rail 4 is fixedly mounted at both ends of the guide rail mounting bracket 3. The counterweight guide rail 4 extends along the height direction of the frame assembly A. The counterweight structure D includes a counterweight frame D1 and a counterweight block D2 disposed within the counterweight frame D1. Both ends of the counterweight frame D1 are slidably engaged with the counterweight guide rails 4 on both sides. In this embodiment, both ends of the counterweight frame D1 are slidably connected to the counterweight guide rail 4 via guide shoes, which can prevent the counterweight structure D from deviating from the guide rail 4 and tilting, thus ensuring the smooth movement of the car B.
[0039] Furthermore, for example Figure 6 As shown, the guide rail mounting bracket 3 includes a parallel rod 31 parallel to the side rod A21. Both ends of the parallel rod 31 are fixedly provided with vertical sections 32 extending towards the corresponding side rod A21. The end of the vertical section 32 away from the parallel rod 31 is fixedly connected to the side rod A21. Two sets of counterweight guide rails 4 are respectively fixed at the inner ends of the two vertical sections 32. Furthermore... Figure 7 As shown, a set of car guide rails 5 are installed on the middle of the outer side of the parallel rod 31 and on the middle of the other side rod A21 directly opposite the parallel rod 31. The car guide rails 5 extend along the height direction of the frame assembly A. Guide wheels B1 are provided on the left and right sides of the car B, respectively, and slide in cooperation with the two sets of car guide rails 5. In this embodiment, there are four sets of guide wheels B1, which are respectively located at the upper and lower ends of the left and right sides of the car B. This design further improves the stability and reliability of the cargo lifting system.
[0040] Please refer to Figure 2 and Figure 9A brake drum E1 is fixedly fitted onto one end of the first drive shaft C3. The braking device E includes a base fixed on the top support frame 1, a pusher E3 mounted on the base, and two sets of brake shoes E5 located on both sides of the brake drum E1. The pusher E3 has a vertically movable push rod E4, and a lever mechanism E6 connects the push rod E4 and the two sets of brake shoes E5. When the pusher E3 pushes the push rod E4 upward, the lever mechanism E6 forces the two sets of brake shoes E5 away from the brake drum E1, and the drive assembly drives the first drive shaft C3 to rotate, causing the car B to move up and down. When the car B stops, the pusher E3 causes the push rod E4 to move downward. Under the transmission of the lever mechanism E6, the two sets of brake shoes E5 are pressed tightly against the surface of the brake drum E1, thus stopping the rotation of the brake drum E1 and the first drive shaft C3. In this embodiment, the braking device E adopts an electro-hydraulic drum brake. The braking function achieved by the electro-hydraulic drum brake is existing technology, and the lever mechanism E6 will not be described in detail here.
[0041] refer to Figure 7 A positioning component F is installed between the car B and the frame assembly A. The positioning component F can lock the car B at a preset stopping position within the frame assembly A, ensuring that the car B stops precisely at the height positions of the first-level shelf G1 and the second-level shelf G2. By setting up the positioning component F and the braking device E, the car B is provided with multiple self-locking functions, which has the technical advantages of strong stability and high safety and reliability.
[0042] Specifically, and then combined Figure 8 As shown, the positioning component F includes an electric cylinder F1 located on one side of the top of the car B, a positioning pin F2 driven by the electric cylinder F1, and a positioning block F3 fixed inside the frame assembly A. The positioning block F3 has a connecting through hole F31. When the car B reaches a preset floor, the electric cylinder F1 drives the positioning pin F2 to move towards the positioning block F3 and through the connecting through hole F31. The positioning pin F2 can be engaged in the connecting through hole F31 of the positioning block F3 to prevent the car B from moving. In this embodiment, there are four sets of electric cylinders F1 and their corresponding positioning pins F2, distributed at the four ends of the top of the car B. In this embodiment, there are eight sets of positioning blocks F3, located at the height of the first and second floors of the frame assembly A. At the same height, two sets of positioning blocks F3 are located on the front side rod A21, and the other two sets of positioning blocks F3 are located on the rear side rod A21.
[0043] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.
Claims
1. A cargo lifting system, comprising a frame assembly (A), a car (B) with a lifting assembly installed within the frame assembly (A), and a drive device (C) for driving the car (B) to move vertically, characterized in that: The frame assembly (A) is equipped with a counterweight structure (D) at one end away from the car (B). A top support frame (1) is fixed to the top of the frame assembly (A). The drive device (C) includes a first drive shaft (C3) and a second drive shaft (C4) rotatably mounted on the top support frame (1), and a drive assembly for driving the first drive shaft (C3) to rotate. The first drive shaft (C3) and the second drive shaft (C4) are arranged in parallel. A counterweight structure (D) is rotatably mounted on one end of the top support frame (1) away from the first drive shaft (C3) and the second drive shaft (C4). The third drive shaft (C5) has two sets of first sprockets (C7) fixedly mounted at both ends of the second drive shaft (C4), two sets of second sprockets (C8) fixedly mounted at both ends of the first drive shaft (C3), and three sets of third sprockets (C9) fixedly mounted at both ends of the third drive shaft (C5). Each of the four sets of first sprockets (C7) is equipped with a first chain (C10). One end of each first chain (C10) is fixedly connected to the counterweight structure (D), and the other end is fixedly connected to the car (B) through two sets of second sprockets (C8) and two sets of third sprockets (C9), respectively. The top support frame (1) is provided with a braking device (E), which is used to release or lock the first drive shaft (C3).
2. The cargo lifting system according to claim 1, characterized in that: The drive assembly includes a motor (C1) fixedly mounted on the top support frame (1), a fourth sprocket (C2) fixedly mounted on the output shaft of the motor (C1), a fifth sprocket (C6) fixedly mounted on the first drive shaft (C3), and the fourth sprocket (C2) and the fifth sprocket (C6) are connected by a second chain drive.
3. The cargo lifting system according to claim 1, characterized in that: The first drive shaft (C3), the second drive shaft (C4) and the third drive shaft (C5) are all rotatably mounted on the top support frame (1) via bearing mounting seats (2).
4. The cargo lifting system according to claim 1, characterized in that: The frame assembly (A) includes four sets of upright structures (A1) and crossbar structures (A2) arranged between two adjacent sets of upright structures (A1). The four sets of upright structures (A1) and crossbar structures (A2) constitute a rectangular frame.
5. The cargo lifting system according to claim 4, characterized in that: Each of the upright structures (A1) described in each group is composed of four uprights (A11) joined together.
6. The cargo lifting system according to claim 4, characterized in that: The crossbar structure (A2) includes side bars (A21) distributed between two adjacent sets of upright structures (A1). A guide rail mounting bracket (3) is fixedly installed on the inner side of one side bar (A21). A counterweight guide rail (4) is fixedly mounted on both ends of the guide rail mounting bracket (3). The counterweight guide rail (4) extends along the height direction of the frame assembly (A). The counterweight structure (D) includes a counterweight frame (D1) and a counterweight block (D2) set in the counterweight frame (D1). The two ends of the counterweight frame (D1) are slidably engaged with the counterweight guide rails (4) on both sides.
7. The cargo lifting system according to claim 6, characterized in that: The guide rail mounting bracket (3) includes a parallel rod (31) parallel to the side rod (A21). Both ends of the parallel rod (31) are fixed with vertical sections (32). The end of the vertical section (32) away from the parallel rod (31) is fixedly connected to the side rod (A21). The counterweight guide rail (4) is set at the inner end of the vertical section (32). A set of car guide rails (5) is installed on the outer side of the parallel rod (31) and on the other side rod (A21) opposite to the parallel rod (31). The car (B) is provided with guide wheels (B1) on both sides that slide with the two sets of car guide rails (5).
8. The cargo lifting system according to claim 1, characterized in that: A brake drum (E1) is fixedly sleeved on one end of the first drive shaft (C3). The braking device (E) includes a base fixed on the top support frame (1), a pusher (E3) set on the base, and two sets of brake shoes (E5) located on both sides of the brake drum (E1). The pusher (E3) is provided with a push rod (E4) that can move up and down. A lever mechanism (E6) is connected between the push rod (E4) and the two sets of brake shoes (E5). The pusher (E3) pushes the push rod (E4) upward, and under the transmission action of the lever mechanism (E6), it can force the two sets of brake shoes (E5) away from the brake drum (E1); the push rod (E4) moves downward, and under the transmission action of the lever mechanism (E6), it can make the two sets of brake shoes (E5) hug the brake drum (E1).
9. The cargo lifting system according to claim 1, characterized in that: A positioning component (F) is provided between the car (B) and the frame assembly (A), and the positioning component (F) is used to lock the car (B) in a preset stopping position within the frame assembly (A).
10. The cargo lifting system according to claim 9, characterized in that: The positioning component (F) includes an electric cylinder (F1) disposed on the top of the car (B), a positioning pin (F2) driven to move by the electric cylinder (F1), and a positioning block (F3) fixed inside the frame assembly (A). The positioning block (F3) is provided with a connecting through hole (F31). When the car (B) reaches a preset floor, the electric cylinder (F1) drives the positioning pin (F2) to move toward the positioning block (F3) and through the connecting through hole (F31).