Width-adjustable four-column lifting machine

Abstract

The utility model discloses a width-adjustable four-column lifting machine, which relates to the technical field of lifting machines, and comprises four lifting columns, lifting cross beams are movably arranged between the two lifting columns, two bearing plates are movably arranged on the two lifting cross beams, adjusting screw rods are respectively movably arranged on the opposite sides of the two lifting cross beams, and the adjusting screw rods are movably arranged on the two bearing plates. First chain wheels are fixedly installed on the two sides of the adjusting lead screw, a connecting beam is further fixedly connected between the two lifting cross beams, a second chain wheel is movably installed on one side in the connecting beam, and limiting plates are further fixedly installed in the positions, above and below the second chain wheel, in the connecting beam. Adjusting lead screws are rotationally installed on the opposite sides of the two lifting columns correspondingly, left-hand threads and right-hand threads are arranged on the outer sides of the adjusting lead screws, and the two adjusting lead screws can synchronously rotate in the two side blocks on the sides of the corresponding bearing plates through cooperation of rotating holes, the two first chain wheels and chains. And therefore, the distance between the two bearing plates can be quickly adjusted, and adjustment is facilitated to adapt to different vehicle types.

Description

Technical Field

[0001] The utility model relates to the technical field of lift, in particular to a four-column lift with adjustable width. Background Art

[0002] A four-column lift is a special mechanical lifting equipment designed for automobile repair and maintenance. Generally, it adopts a hydraulic transmission method. Through the coordinated work of a high-pressure hydraulic pump and an oil cylinder, four strong columns can be lifted and lowered smoothly to carry and support the vehicle.

[0003] The four-column lift can also be customized according to customer needs, such as selecting side sliding plates, reserving positions for corner plates, secondary lifting trolleys, etc., to meet the needs of specific maintenance tasks. For example, the Chinese utility model patent disclosed in the publication number CN215905791U: a mother-and-son type four-column lift. This application includes a column device, a cross beam, a main machine platform, a lifting device, and a sub-machine platform, which can adapt to the parking of vehicles at different chassis positions and also meet the different operating habits of workers. However, due to the different chassis widths of vehicles of different models, the wheelbases of different models will also be different. Since the platform width of this application is fixed, for vehicles with a large width difference, it cannot be perfectly adapted. That is, when a narrower vehicle is parked, there may be too much space on both sides, and one side of the main machine platform will be too close to the middle position of the vehicle chassis, which is not convenient for overhauling the vehicle chassis and will lead to a decrease in stability. While a wider vehicle may not be able to be fully parked on the platform, affecting the lifting effect and safety. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a four-column lift with adjustable width, which can effectively solve the problems in the background art.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A four-column lift with adjustable width includes four lifting columns, and a lifting cross beam is movably installed between two lifting columns. Two supporting plates are movably installed on the two lifting cross beams. Adjusting lead screws are respectively movably installed on the opposite sides of the two lifting cross beams. First sprockets are fixedly installed on both sides of each adjusting lead screw. A connecting beam is also fixedly connected between the two lifting cross beams. A second sprocket is movably installed on one side inside the connecting beam. Limiting plates are also fixedly installed inside the connecting beam above and below the second sprocket. Two rollers are movably installed on one side of each limiting plate.

[0007] Preferably, three first shaft seats are respectively fixedly installed on the opposite sides of the two lifting cross beams.

[0008] Preferably, the adjusting lead screw is rotatably installed in three first shaft seats, and the part of the adjusting lead screw located in the first shaft seat is a smooth rod. The adjusting lead screw on both sides of the first shaft seat in the middle position is respectively provided with a left-handed thread and a right-handed thread. Through the arrangement of the two adjusting lead screws, after the two adjusting lead screws rotate synchronously, the two supporting plates can be driven to move relatively or in the opposite direction synchronously.

[0009] Preferably, the two first sprockets are connected by chain drive.

[0010] Preferably, a second shaft seat is fixedly installed at the center position on one side inside the connecting beam. A rotating shaft is rotatably installed in the second shaft seat. One side of the rotating shaft passes through the through hole on one side of the connecting beam and extends to one side of the connecting beam and is fixedly installed with a handwheel. The second sprocket is fixedly installed on the outer side of the rotating shaft. The second sprocket is connected with the chain between the two first sprockets. By rotating the handwheel to rotate the rotating shaft, the two first sprockets can be driven to rotate synchronously in cooperation with the second sprocket and the chain.

[0011] Preferably, two bases are respectively fixedly installed on the opposite sides of the two limiting plates. An installation groove is formed on one side of the limiting plate. Two fixed shafts are fixedly installed on one side inside the installation groove. A horizontal rotating hole is formed at the center position inside the roller. The roller is rotatably installed on the fixed shaft through the rotating hole and is limited by a snap ring. The limiting plate is fixedly installed on one side of the second shaft seat through the two bases. The roller abuts against the chain. With the arrangement of the two groups of limiting plates and rollers, the chain between the two first sprockets can be kept stably connected with the second sprocket.

[0012] Preferably, two side blocks are fixedly installed on both sides of the supporting plate. A threaded hole is formed in the side block. The supporting plate is inserted between the two lifting cross beams, and the side block is threadedly connected with the corresponding adjusting lead screw through the threaded hole.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] For the four-column lift with adjustable width of the utility model, an adjusting lead screw is rotatably installed on each of the opposite sides of the two lifting columns, and a left-handed thread and a right-handed thread are arranged on the outer side of the adjusting lead screw. Through the cooperation of the rotating hole, the two first sprockets and the chain, the two adjusting lead screws can rotate synchronously in the two side blocks on one side of the corresponding supporting plate, so that the distance between the two supporting plates can be quickly adjusted, which is beneficial to adjusting according to different vehicle models. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 is Figure 1 the enlarged view of part A in

[0017] Figure 3 is Figure 1 An enlarged view of part B in

[0018] Figure 4 is Figure 1 An enlarged view of part C in

[0019] Figure 5 Schematic diagram of the split structure of the limit plate and the roller of the present utility model;

[0020] Figure 6 Schematic diagram of the partial structure of the supporting plate of the present utility model.

[0021] In the figure: 1, lifting column; 2, lifting cross beam; 3, supporting plate; 4, adjusting screw rod; 5, first sprocket; 6, connecting beam; 7, second sprocket; 8, limit plate; 9, roller; 10, first shaft seat; 11, second shaft seat; 12, rotating shaft; 13, hand wheel; 14, base; 15, installation groove; 16, fixed shaft; 17, rotating hole; 18, side block; 19, screw hole. Specific embodiments

[0022] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] As Figures 1-6 shown, a four-column lift with adjustable width provided by the present utility model includes four lifting columns 1, and a lifting cross beam 2 is movably installed between two lifting columns 1. Two supporting plates 3 are movably installed on two lifting cross beams 2. Adjusting screw rods 4 are movably installed on opposite sides of two lifting cross beams 2 respectively. First sprockets 5 are fixedly installed on both sides of adjusting screw rod 4. A connecting beam 6 is also fixedly connected between two lifting cross beams 2. A second sprocket 7 is movably installed on one side inside connecting beam 6. Limit plates 8 are fixedly installed inside connecting beam 6 above and below the position of second sprocket 7. Two rollers 9 are movably installed on one side of limit plate 8.

[0024] As Figures 2-4As shown in the figure, three first shaft seats 10 are fixedly installed on the opposite sides of the two lifting crossbeams 2 respectively. The adjusting screw rod 4 is rotatably installed in the three first shaft seats 10, and the part of the adjusting screw rod 4 located in the first shaft seat 10 is a smooth rod. The adjusting screw rods 4 on both sides of the first shaft seat 10 at the middle position are respectively provided with left-handed threads and right-handed threads. Through the setting of the two adjusting screw rods 4, after the two adjusting screw rods 4 rotate synchronously, the two supporting plates 3 can be driven to move relatively or in the opposite direction synchronously. The two first sprockets 5 are connected by chain drive. A second shaft seat 11 is fixedly installed at the center position on one side inside the connecting beam 6. A rotating shaft 12 is rotatably installed in the second shaft seat 11. One side of the rotating shaft 12 passes through the through hole on one side of the connecting beam 6 and extends to one side of the connecting beam 6 and is fixedly installed with a handwheel 13. The second sprocket 7 is fixedly installed on the outside of the rotating shaft 12. The second sprocket 7 is connected with the two first sprockets 5 by chain drive. By rotating the rotating shaft 12 with the handwheel 13, the two first sprockets 5 can be driven to rotate synchronously with the second sprocket 7 and the chain;

[0025] As Figures 4-5 shown in the figure, two bases 14 are fixedly installed on the opposite sides of the two limit plates 8 respectively. An installation groove 15 is opened on one side of the limit plate 8. Two fixed shafts 16 are fixedly installed on one side inside the installation groove 15. A horizontally arranged rotating hole 17 is opened at the center position inside the roller 9. The roller 9 is rotatably installed on the fixed shaft 16 through the rotating hole 17 and is limited by a circlip. The limit plate 8 is fixedly installed on one side of the second shaft seat 11 through the two bases 14. The roller 9 abuts against the chain. With the setting of the two groups of limit plates 8 and rollers 9, the chain between the two first sprockets 5 and the second sprocket 7 can be kept stably connected;

[0026] As Figure 6 shown in the figure, two side blocks 18 are fixedly installed on both sides of the supporting plate 3. A threaded hole 19 is opened in the side block 18. The supporting plate 3 is inserted and installed between the two lifting crossbeams 2, and the side block 18 is threadedly connected with the corresponding adjusting screw rod 4 through the threaded hole 19.

[0027] It should be noted that the present utility model is a four-column lift with adjustable width. When it is necessary to adjust the width between the two supporting plates 3 according to different vehicle models, the handwheel 13 can be manually rotated. Then, the handwheel 13 drives one side of the rotating shaft 12 to rotate within the second shaft seat 11, so that the rotating shaft 12 drives the second sprocket 7 to rotate at the same time. The second sprocket 7 drives the chain between the two first sprockets 5 to rotate. With the arrangement of multiple rollers 9 on one side of the two limiting plates 8, it can be ensured that the chain is always connected to the second sprocket 7 during rotation. Then, the chain drives the two first sprockets 5 to rotate synchronously, so that the two first sprockets 5 drive the corresponding adjusting lead screws 4 to rotate within the multiple first shaft seats 10 respectively. Moreover, the left-handed thread area and the right-handed thread area on the outer side of the adjusting lead screw 4 rotate within the screw holes 19 of the two side blocks 18 on one side of the corresponding supporting plate 3 respectively. Thus, the two rotating adjusting lead screws 4 can synchronously drive the two supporting plates 3 to perform horizontal displacement adjustment on the two lifting crossbeams 2, so as to adjust the width between the two supporting plates 3.

[0028] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A four-column lift with adjustable width, characterized in that: It includes four lifting columns (1), and a lifting crossbeam (2) is movably installed between two lifting columns (1). Two supporting plates (3) are movably installed on the two lifting crossbeams (2). On the opposite sides of the two lifting crossbeams (2), adjusting lead screws (4) are respectively movably installed. On both sides of the adjusting lead screw (4), first sprockets (5) are fixedly installed. A connecting beam (6) is also fixedly connected between the two lifting crossbeams (2). On one side inside the connecting beam (6), a second sprocket (7) is movably installed. On both the upper and lower positions of the connecting beam (6) where the second sprocket (7) is located, limit plates (8) are fixedly installed. On one side of the limit plate (8), two rollers (9) are movably installed.

2. The four-column lift with adjustable width according to claim 1, wherein: On the opposite sides of the two lifting crossbeams (2), three first shaft seats (10) are respectively fixedly installed.

3. The four-column lift with adjustable width according to claim 2, characterized in that: The adjusting lead screw (4) is rotatably installed in the three first shaft seats (10), and the part of the adjusting lead screw (4) located inside the first shaft seat (10) is a smooth rod. On both sides of the first shaft seat (10) at the middle position, the adjusting lead screw (4) is respectively provided with a left-handed thread and a right-handed thread.

4. The four-column lift with adjustable width according to claim 3, wherein: The two first sprockets (5) are connected by chain drive.

5. A four-column lift with adjustable width according to claim 4, characterized in that: At the central position on one side inside the connecting beam (6), a second shaft seat (11) is fixedly installed. A rotating shaft (12) is rotatably installed in the second shaft seat (11). One side of the rotating shaft (12) passes through a through hole on one side of the connecting beam (6) and extends to one side of the connecting beam (6) and a handwheel (13) is fixedly installed. The second sprocket (7) is fixedly installed on the outer side of the rotating shaft (12). The second sprocket (7) is connected by chain drive with the two first sprockets (5).

6. The four-column lift with adjustable width according to claim 5, characterized in that: On the opposite sides of the two limit plates (8), two bases (14) are respectively fixedly installed. On one side of the limit plate (8), an installation groove (15) is opened. On one side inside the installation groove (15), two fixed shafts (16) are fixedly installed. At the central position inside the roller (9), a horizontally arranged rotating hole (17) is opened. The roller (9) is rotatably installed on the fixed shaft (16) through the rotating hole (17) and is limited by a circlip. The limit plate (8) is fixedly installed on one side of the second shaft seat (11) through the two bases (14). The roller (9) abuts against the chain.

7. The four-column lift with adjustable width according to claim 1, characterized in that: On both sides of the supporting plate (3), two side blocks (18) are fixedly installed. A threaded hole (19) is opened in the side block (18). The supporting plate (3) is inserted and installed between the two lifting crossbeams (2), and the side block (18) is threadedly connected with the corresponding adjusting lead screw (4) through the threaded hole (19).

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