A new double-column lifting machine

Abstract

The utility model belongs to lifting equipment technical field, concretely is a kind of novel double-column lifting machine, including left and right column of relative arrangement, the trolley is slidably arranged in left and right column, and the top and bottom of left and right column are equipped with wire rope wheel, first mounting shaft is equipped in left and right column, and wire rope wheel is installed on first mounting shaft by first bearing;First mounting shaft inside is equipped with first oil circuit, and first oil circuit is communicated with first bearing, first mounting shaft end face is embedded with first oil nozzle, and first oil nozzle is communicated with first oil circuit, ensure the smooth rotation of wire rope wheel, improve service life;It further includes a group of oil cylinders respectively arranged in left column and right column, the wheel frame is arranged at the end of the piston rod of oil cylinder, the step surface and the snap spring groove are arranged at the end of the piston rod of oil cylinder, the bottom surface of the wheel frame is arranged on the step surface by penetrating the piston rod, the wheel frame and the piston rod are locked by installing the snap spring in the snap spring groove, and the quick-release structure is used between oil cylinder and wheel frame, so that the wheel frame can be removed by removing the snap spring, and the maintenance in later period is facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of lifting equipment technology, and specifically relates to a novel two-post lifting machine. Background Technology

[0002] Two-post lifts are specialized lifting equipment commonly used in the automotive repair and maintenance industry. They consist of two posts, a support arm, a lifting mechanism, and safety devices. The support arm is driven by hydraulics or an electric motor to smoothly lift the vehicle into the air. Its core function is to provide ample space for operations under the vehicle, facilitating chassis inspection, tire changes, fluid changes, and other procedures. With its space-saving and stable lifting characteristics, it is widely used in 4S car dealerships, repair shops, and car detailing shops, and is especially suitable for the repair and maintenance of light vehicles such as sedans and small trucks.

[0003] During use, some structural defects were found in existing two-post lifts: 1. The wire rope pulley plays an important role in adjusting the synchronous rise or fall of the pulleys on both sides and needs to maintain smooth rotation. However, the existing wire rope pulleys lack effective lubrication methods. Lubricating grease is often forgotten and not noticed until a failure occurs. In addition, the wire rope pulleys located at the top are relatively high, making it very inconvenient to add lubricating grease, resulting in a short service life.

[0004] 2. The existing hydraulic cylinder and wheel frame are welded together as a single structure, which cannot be disassembled during maintenance, making it extremely inconvenient. For example, when replacing the hydraulic cylinder seal ring, it is restricted to remove the hydraulic cylinder and wheel frame from the lift for replacement and then reinstall them.

[0005] 3. The existing hydraulic cylinder pulley is fixedly mounted to its mounting shaft, which is rotatably mounted on both sides of the pulley frame. Both sides of the mounting shaft are locked by snap rings. Because the wire rope pulley bears a large force, the friction between the mounting shaft and the mounting hole of the pulley frame is significant during rotation. Over time, the gap between the mounting shaft and the mounting hole increases, affecting normal operation and potentially causing safety accidents in severe cases. Utility Model Content

[0006] Purpose of the utility model: In order to overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a new type of double-column lift, which aims to solve the above-mentioned technical problems.

[0007] Technical solution: In order to achieve the above objectives, this utility model provides a novel double-column lift, including a left column and a right column arranged opposite to each other, a trolley slidably provided in both the left column and the right column, wire rope pulleys provided at the top and bottom of the left column and the right column, and a first mounting shaft provided inside the left column and the right column, the wire rope pulleys being rotatably mounted on the first mounting shaft through a first bearing; The first mounting shaft has a first oil passage inside, which is connected to the first bearing. A first grease nipple is embedded on the end face of the first mounting shaft, which is connected to the first oil passage. The first grease nipple provides lubricating grease to the gap of the first bearing to ensure the smooth rotation of the wire rope wheel and improve its service life. It also includes a set of hydraulic cylinders respectively located in the left and right columns. The piston rod of the hydraulic cylinder is provided with a wheel frame at its end. The piston rod of the hydraulic cylinder is provided with a stepped surface and a retaining spring groove. The wheel frame passes through the piston rod and its bottom surface is placed on the stepped surface. A retaining spring is installed in the retaining spring groove to lock the wheel frame and the piston rod. The hydraulic cylinder and the wheel frame adopt a quick-release structure. The wheel frame can be removed simply by removing the retaining spring, which is convenient for later maintenance.

[0008] Furthermore, the wheel frame is provided with a second mounting shaft, one end of which has a stop groove, and the side of the wheel frame has a stop plate. The stop plate contacts the stop groove to prevent the second mounting shaft from rotating. The stop plate is fixed to the wheel frame, and the second mounting shaft is fixed by the cooperation between the stop plate and the stop groove on the second mounting shaft.

[0009] Furthermore, a hydraulic cylinder pulley is mounted on the second mounting shaft via a second bearing. The second mounting shaft has a second oil passage communicating with the second bearing. A second grease nipple is located on the end face of the second mounting shaft, communicating with the second oil passage. The second grease nipple provides lubricating grease to the clearance of the second bearing, ensuring smooth rotation of the hydraulic cylinder pulley and improving its service life.

[0010] Furthermore, the left and right columns are provided with oil supply pipe mounting holes on their sides to supply oil to the first oil nozzle.

[0011] Furthermore, the pulleys in the left column and the right column are connected by a set of parallel steel wire ropes, which are wound around a steel wire rope pulley.

[0012] Furthermore, a drive rope is wound around the hydraulic cylinder pulley, and the two ends of the drive rope are respectively connected to the bottom of the trolley and the base of the lift.

[0013] Furthermore, the trolley is provided with a support arm assembly, which includes a mounting base and a set of support arms disposed on the mounting base.

[0014] Furthermore, the right column is equipped with a drive motor and an oil tank, and the oil tank is connected to the oil cylinder through an oil pipe.

[0015] As can be seen from the above technical solution, this utility model has the following beneficial effects compared with the prior art: 1. This utility model provides a novel double-column lift with a simple structure and reasonable design. A first grease nipple is provided at the wire rope pulley, and lubricating grease is added to the first oil passage in the first mounting shaft through the first grease nipple. The first oil passage leads to the first bearing on the first mounting shaft, which can ensure the stability of the working state of the first bearing and the wire rope pulley and significantly improve their service life. In addition, the oil supply pipe can be installed through the oil supply pipe mounting hole to achieve quick oil injection.

[0016] 2. In addition, the hydraulic cylinder and the wheel frame are connected in a detachable manner, which allows the wheel frame to be quickly removed when maintenance is required, facilitating maintenance work.

[0017] 3. In addition, the second mounting shaft on the wheel frame is stopped by a brake pad and no longer rotates in the mounting hole of the wheel frame, thus avoiding the problem of widening the shaft hole clearance due to friction; the hydraulic cylinder sheave is mounted on the second mounting shaft through the second bearing to achieve normal rotation of the hydraulic cylinder sheave. At the same time, a second oil nozzle and a second oil passage are set on the second mounting shaft to supply lubricating grease to the second bearing, ensuring stable working conditions and extending service life. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of a double-column large base bending support arm lifting machine according to the present invention; Figure 2 This is a cross-sectional view of a double-column large base bending support arm lifting machine according to the present invention; Figure 3 This is a schematic diagram of the structure of the base assembly described in this utility model; Figure 4 This is a bottom view of the base assembly described in this utility model; Figure 5 This is a schematic diagram of the support arm assembly described in this utility model; Figure 6 This is a partial installation diagram of the hydraulic cylinder, wheel frame, and hydraulic cylinder sheave in this utility model; Figure 7 This is a partial exploded view of the wheel frame and hydraulic cylinder pulley of this utility model; Figure 8 This is a cross-sectional view of the oil cylinder, wheel frame, and oil cylinder sheave in this utility model.

[0019] In the diagram: 1-Left column, 2-Right column, 3-Wire rope pulley, 4-First mounting shaft, 5-First bearing, 6-First oil passage, 7-First grease nipple, 8-Oil cylinder, 9-Wheel frame, 10-Step surface, 11-Snap ring groove, 12-Snap ring, 13-Second mounting shaft, 14-Stop groove, 15-Stop plate, 16-Second bearing, 17-Oil cylinder pulley, 18-Second oil passage, 19-Second grease nipple, 20-Oil supply pipe mounting hole, 21-Pulley, 22-Mounting base, 23-Support arm, 24-Drive motor, 25-Oil tank. Detailed Implementation

[0020] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0021] like Figure 1-5 As shown: A novel twin-post lift includes a left post 1 and a right post 2 arranged opposite to each other. A trolley 21 is slidably provided in both the left post 1 and the right post 2. A wire rope wheel 3 is provided at the top and bottom of the left post 1 and the right post 2. A first mounting shaft 4 is provided inside the left post 1 and the right post 2. The wire rope wheel 3 is rotatably mounted on the first mounting shaft 4 through a first bearing 5. The first mounting shaft 4 is provided with a first oil passage 6 inside, which is connected to the first bearing 5. A first grease nipple 7 is embedded on the end face of the first mounting shaft 4, which is connected to the first oil passage 6. The first grease nipple 7 is a grease nipple with a built-in one-way valve. Grease is injected into the first bearing 5 through the first oil passage 6 via the first grease nipple 7, thereby improving the service life of the wire rope wheel 3 and the first bearing 5. It also includes a set of hydraulic cylinders 8 respectively located in the left column 1 and the right column 2. The piston rod end of each hydraulic cylinder 8 has a wheel frame 9. The piston rod end of the hydraulic cylinder 8 has a stepped surface 10 and a retaining spring groove 11. The wheel frame 9 passes through the piston rod, and its bottom surface rests on the stepped surface 10. A retaining spring 12 is installed in the retaining spring groove 11 to lock the wheel frame 9 to the piston rod. The bottom surface of the wheel frame 9 contacts and limits the movement of the stepped surface 10. The retaining spring 12 on the piston rod achieves the upper limit locking of the wheel frame 9 and the piston rod. Since the force-bearing part between the wheel frame 9 and the piston rod is at the stepped surface 10 regardless of whether the trolley 21 is rising or falling during the operation of the lift, the retaining spring 12 will not be stressed, thus achieving a stable and reliable connection. When maintenance is required, especially when replacing the sealing ring of the hydraulic cylinder 8, simply remove the retaining spring 12 and pull upwards to remove the wheel frame 9, facilitating maintenance. In this embodiment, the wheel frame 9 is also equipped with a lifting handle, such as... Figure 7 As shown, this further facilitates disassembly.

[0022] like Figure 6-8 As shown, the wheel frame 9 is provided with a second mounting shaft 13. One end of the second mounting shaft 13 is provided with a stop groove 14, and the side of the wheel frame 9 is provided with a stop plate 15. The stop plate 15 contacts the stop groove 14 to prevent the second mounting shaft 13 from rotating. A hydraulic cylinder pulley 17 is mounted on the second mounting shaft 13 through a second bearing 16. The second mounting shaft 13 is provided with a second oil passage 18, which communicates with the second bearing 16. A second oil nozzle 19 is provided on the end face of the second mounting shaft 13, which communicates with the second oil passage 18.

[0023] The second mounting shaft 13 is prevented from rotating by the engagement of the stop plate 15 and the stop groove 14. The second bearing 16 is mounted on the second mounting shaft 13, and the hydraulic cylinder pulley 17 is sleeved on the second bearing 16. During operation, the hydraulic cylinder pulley 17 rotates relative to the second mounting shaft 16 under the action of the second bearing 16. At the same time, the second grease nipple 19 provides lubricating grease to the second bearing 16 through the second oil passage 18 to ensure the stability of its working state and improve its service life.

[0024] like Figure 2 As shown, the left column 1 and right column 2 are provided with oil supply pipe mounting holes 20 on their sides to supply oil to the first oil nozzle 7. An oil supply pipe is installed in the mounting hole and communicates with the first oil nozzle 7, allowing for quick and easy application of lubricating grease to the first bearing 5. For the wire rope pulley 17, which moves up and down, lubricating grease is injected into the second oil nozzle 19 via an oil gun when it reaches its lowest point.

[0025] Specifically, the pulley 21 in the left column 1 and the pulley 21 in the right column 2 are connected by a set of parallel steel wire ropes, which are wound around the steel wire rope wheel 3.

[0026] Specifically, a drive rope is wound around the hydraulic cylinder pulley 17, and the two ends of the drive rope are connected to the bottom of the trolley 21 and the base of the lift, respectively.

[0027] Specifically, the trolley 21 is provided with a support arm assembly, which includes a mounting base 22 and a set of support arms 23 disposed on the mounting base 22.

[0028] Specifically, the right column 2 is equipped with a drive motor 24 and an oil tank 25, and the oil tank 25 is connected to the oil cylinder 8 via an oil pipe. The drive motor 24 drives the hydraulic oil in the oil tank 25 to be pumped into the oil cylinder 8, and the oil cylinder 8 drives the trolley 21 to move up and down.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A novel two-post lift, comprising a left post (1) and a right post (2) arranged opposite to each other, wherein trolleys (21) are slidably provided in both the left post (1) and the right post (2), characterized in that, The top and bottom of the left column (1) and the right column (2) are provided with wire rope wheels (3), and the left column (1) and the right column (2) are provided with a first mounting shaft (4). The wire rope wheels (3) are rotatably mounted on the first mounting shaft (4) through the first bearing (5). The first mounting shaft (4) is provided with a first oil passage (6) inside, which is connected to the first bearing (5). A first oil nozzle (7) is embedded on the end face of the first mounting shaft (4), which is connected to the first oil passage (6). It also includes a set of hydraulic cylinders (8) respectively located in the left column (1) and the right column (2). The piston rod of the hydraulic cylinder (8) is provided with a wheel frame (9) at the end. The piston rod of the hydraulic cylinder (8) is provided with a stepped surface (10) and a snap ring groove (11). The wheel frame (9) passes through the piston rod and its bottom surface is placed on the stepped surface (10). A snap ring (12) is installed in the snap ring groove (11) to lock the wheel frame (9) and the piston rod.

2. The novel twin-post lift according to claim 1, characterized in that, The wheel frame (9) is provided with a second mounting shaft (13), one end of which is provided with a stop groove (14), and the side of the wheel frame (9) is provided with a stop piece (15). The stop piece (15) contacts the stop groove (14) to prevent the second mounting shaft (13) from rotating.

3. A novel twin-post lift according to claim 2, characterized in that, A hydraulic cylinder pulley (17) is mounted on the second mounting shaft (13) via a second bearing (16). A second oil passage (18) is provided inside the second mounting shaft (13). The second oil passage (18) is connected to the second bearing (16). A second oil nozzle (19) is provided on the end face of the second mounting shaft (13). The second oil nozzle (19) is connected to the second oil passage (18).

4. A novel twin-post lift according to claim 1, characterized in that, The left column (1) and right column (2) are provided with oil supply pipe mounting holes (20) on their sides to supply oil to the first oil nozzle (7).

5. A novel twin-post lift according to claim 1, characterized in that, The pulley (21) in the left column (1) and the pulley (21) in the right column (2) are connected by a set of parallel steel wire ropes, which are wound around the steel wire rope wheel (3).

6. A novel twin-post lift according to claim 3, characterized in that, A drive rope is wound around the hydraulic cylinder pulley (17), and the two ends of the drive rope are connected to the bottom of the trolley (21) and the base of the lift, respectively.

7. A novel twin-post lift according to claim 1, characterized in that, The trolley (21) is provided with a support arm assembly, which includes a mounting base (22) and a set of support arms (23) on the mounting base (22).

8. A novel twin-post lift according to claim 1, characterized in that, The right column (2) is equipped with a drive motor (24) and an oil tank (25), and the oil tank (25) is connected to the oil cylinder (8) through an oil pipe.

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