Lifting machine with anti-falling function

Abstract

The utility model discloses a lifting machine with an anti-falling function, which relates to the technical field of lifting equipment and comprises four upright posts, side plates are fixedly mounted on one sides in the upright posts, a cross beam is movably connected between the two upright posts, lifting mechanisms are fixedly mounted on two sides of the cross beam, and two fixing seats are fixedly mounted on two sides in the cross beam. Two bearing plates are fixedly installed on the two cross beams, a first connecting rod is movably installed between the two cross beams located on one sides of the bearing plates, connecting bases are fixedly installed on the two sides of the first connecting rod respectively, and a fixing shaft is further fixedly installed on the cross beam located below the lifting mechanism. A side plate is arranged on one side in a stand column, a limiting plate is arranged in a cross beam located on one side of the side plate, and the limiting plate is movably installed on one side in the cross beam through a fixing pipe, a second fixing rod, a pull rod and a first compression spring, so that when the cross beam ascends, one side of the limiting plate is sequentially clamped into corresponding limiting grooves in the side plate; therefore, the function of preventing the cross beam from falling is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting equipment, in particular to a lift with a falling prevention function. Background Art

[0002] A four-column lift is a professional hydraulic lifting equipment, which is widely used in the fields of automobile maintenance, repair and inspection. It mainly consists of four columns, a platform, a hydraulic system, an electrical system and other components. The columns are lifted up and down hydraulically to realize the lifting or transfer of automobiles or other goods.

[0003] The existing Chinese utility model patent with the publication number of CN221397166U: a safety four-column lift. In this application, a number of pressure detection modules are arranged on the outer edges of the two lifting platforms close to the four-column lift. Such an arrangement can detect the tires in time through the pressure monitoring module to prevent the driver from driving the vehicle off one side of the lifting platform due to improper operation. The purpose of setting it close to the edge is to minimize the impact on normal vehicles entering and leaving directly. In addition, even if the vehicle does not drive off the lifting platform, the tire pressing on the pressure detection module also indicates that the stopping position of the vehicle is not good, too close to one side, which is inconvenient for maintenance personnel to operate and poses a safety risk. And this application consists of a cross beam installed between the lifting columns and two lifting platforms with both ends mounted on the cross beam. When the lifting platform is lifted by the lifting columns and the cross beam, if the lifting system fails, the cross beam will fall rapidly, resulting in the rapid fall of the lifting platform. When a vehicle is parked on the lifting platform, the vehicle will be damaged. At the same time, the rapidly falling lifting platform will also cause harm to the maintenance personnel in the position below the vehicle. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a lift with a falling prevention function, 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 lift with a falling prevention function includes four columns. One side inside the column is fixedly installed with a side plate, and a cross beam is movably connected between the two columns. Lifting mechanisms are fixedly installed on both sides of the cross beam. Two fixed seats are also fixedly installed on both sides inside the cross beam. Two supporting plates are fixedly installed on the two cross beams. A first connecting rod is movably installed between the two cross beams on one side of the supporting plate. Connecting seats are respectively fixedly installed on both sides of the first connecting rod. A fixed shaft is also fixedly installed on the cross beam at the position below the lifting mechanism. A limiting plate is movably installed on the outside of the fixed shaft. A gear is movably installed on one side of the limiting plate. A mounting seat is fixedly installed on one side inside the gear. Two limiting shafts are movably installed inside the mounting seat.

[0007] Preferably, a plurality of limit grooves are provided in the side plate, and a plurality of tooth blocks are fixedly installed on the side plate located on one side of the limit groove. By providing a plurality of limit grooves in the side plate, one side of the limit plate can be inserted into the limit groove to limit the downward movement of the beam.

[0008] Preferably, a control handle is fixedly mounted on one side of the first connecting rod, and a second connecting rod is rotatably connected between two connecting seats located on one side of the crossbeam.

[0009] Preferably, a fixed tube is fixedly installed at the center position of the limit plate, the fixed tube axis located on one side of the limit plate is connected to the first fixed rod, the fixed shaft located above the first fixed rod is fixedly installed with the second fixed rod, the limit plate is rotatably installed on the outside of the fixed shaft through the fixed tube, and a third connecting rod is arranged between the first fixed rod and the connecting seat, one side of the third connecting rod is rotatably installed on one side of the connecting seat, and the other side of the third connecting rod is inserted and installed on one side of the first fixed rod, through the arrangement of the first connecting rod and the connecting seat, the second connecting rod and the third connecting rod, the four limit plates on both sides of the two beams can be synchronously operated to rotate.

[0010] Preferably, a pull rod is inserted into the second fixed rod, and the pull rod is an L-shaped structure. The side of the pull rod away from the second fixed rod is inserted into the fixed seat, and the pull rod located between the two fixed seats is also provided with a first compression spring. Through the cooperation between the second fixed rod, the pull rod and the first compression spring, one side of the limit plate can be sequentially inserted into the corresponding limit groove when the cross beam moves up.

[0011] Preferably, an inner toothed ring is fixedly mounted on a side of the limiting plate that is away from the second fixing rod.

[0012] Preferably, a rotation groove is provided on one side of the gear, and an installation groove is provided on the inner side of the rotation groove. The gear is inserted and installed on a fixed tube on one side of the limit plate and limited by a retaining spring. Two countersunk holes are provided in the mounting seat, and a plurality of locking teeth are fixedly installed on the top of the limit shaft, and an end block is fixedly installed on the bottom of the limit shaft. The limit shaft is inserted and installed in the countersunk hole, and a second compression spring is provided on the limit shaft sleeve located at the top of the countersunk hole and the difficulty of the end block bracket. When the gear rotates at high speed, the centrifugal force generated by the rotation of the gear can be used to throw the limit shaft out a certain distance, so that the locking teeth are stuck in the inner side of the inner tooth groove ring, which can drive the limit plate to rotate and quickly stick into the corresponding limit groove.

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

[0014] A lift with a fall prevention function according to the present utility model is provided with a side plate on one side inside the column, and a limit plate is arranged inside the cross beam on one side of the side plate. The limit plate is movably installed inside the cross beam on one side through a fixed pipe, a second fixing rod, a pull rod, and a first compression spring. When the cross beam rises, one side of the limit plate can be sequentially engaged into the corresponding limit slots inside the side plate, thereby achieving the function of preventing the cross beam from falling.

[0015] A gear is arranged on one side of the limit plate, and a mounting seat and a side plate are arranged on one side of the gear. In cooperation with the internal gear slot ring on one side of the limit plate and the tooth block on one side of the side plate, after manually releasing the engagement between the limit plate and the limit slot, if the lifting mechanism fails and the cross beam suddenly falls, the gear can use the centrifugal force of rotation to throw out the mounting seat and drive the limit plate to rotate, so that one side of the limit plate can quickly engage into the corresponding limit slot to prevent the cross beam from continuing to fall. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the split main structure of the present utility model;

[0017] Figure 2 is Figure 1 an enlarged view of part A in

[0018] Figure 3 is a schematic diagram of the installation structure of the limit plate and the gear of the present utility model;

[0019] Figure 4 is a schematic diagram of the split structure of the limit plate and the gear of the present utility model;

[0020] Figure 5 is a schematic diagram of the gear structure of the present utility model;

[0021] Figure 6 is a schematic diagram of the split structure of the mounting seat of the present utility model.

[0022] In the figure: 1, column; 2, cross beam; 3, lifting mechanism; 4, supporting plate; 5, first connecting rod; 6, operating handle; 7, connecting seat; 8, fixed shaft; 9, limit plate; 10, gear; 11, mounting seat; 12, side plate; 13, limit slot; 14, tooth block; 15, second connecting rod; 16, first fixing rod; 17, third connecting rod; 18, fixed pipe; 19, second fixing rod; 20, pull rod; 21, first compression spring; 22, fixed seat; 23, internal gear slot ring; 24, rotating slot; 25, mounting slot; 26, counterbore; 27, end block; 28, engaging tooth; 29, second compression spring; 30, limit shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] As Figures 1-6 shown, a lift with a fall prevention function provided by the present utility model includes four columns 1. On one side inside the column 1, a side plate 12 is fixedly installed. A cross beam 2 is movably connected between two columns 1. Lifting mechanisms 3 are fixedly installed on both sides of the cross beam 2. Two fixing seats 22 are also fixedly installed on both sides inside the cross beam 2. Two supporting plates 4 are fixedly installed on two cross beams 2. A first connecting rod 5 is movably installed between two cross beams 2 on one side of the supporting plate 4. Connecting seats 7 are respectively fixedly installed on both sides of the first connecting rod 5. A fixing shaft 8 is also fixedly installed on the cross beam 2 at a position below the lifting mechanism 3. A limiting plate 9 is movably installed outside the fixing shaft 8. A gear 10 is movably installed on one side of the limiting plate 9. A mounting seat 11 is fixedly installed on one side inside the gear 10. Two limiting shafts 30 are movably installed inside the mounting seat 11.

[0025] As Figures 2-4 shown, a plurality of limiting grooves 13 are opened in the side plate 12. A plurality of tooth blocks 14 are fixedly installed on the side plate 12 on one side of the limiting groove 13. By opening a plurality of limiting grooves 13 in the side plate 12, one side of the limiting plate 9 can be clamped into the limiting groove 13 to limit the downward movement of the cross beam 2. A control handle 6 is fixedly installed on one side of the first connecting rod 5. A second connecting rod 15 is rotatably connected between two connecting seats 7 on one side of the cross beam 2. A fixing tube 18 is fixedly installed at the central position of the limiting plate 9. A first fixing rod 16 is axially connected to the fixing tube 18 on one side of the limiting plate 9. A second fixing rod 19 is fixedly installed on the fixing shaft 8 at a position above the first fixing rod 16. The limiting plate 9 is rotatably installed outside the fixing shaft 8 through the fixing tube 18. A third connecting rod 17 is provided between the first fixing rod 16 and the connecting seat 7. One side of the third connecting rod 17 is rotatably installed on one side of the connecting seat 7. The other side of the third connecting rod 17 is inserted through one side of the first fixing rod 16. Through the arrangement of the first connecting rod 5, the connecting seat 7, the second connecting rod 15 and the third connecting rod 17, the four limiting plates 9 on both sides of the two cross beams 2 can be rotated synchronously. A pull rod 20 is inserted through the second fixing rod 19. The pull rod 20 has an L-shaped structure. The side of the pull rod 20 away from the second fixing rod 19 is inserted through the fixing seat 22. A first compression spring 21 is also sleeved on the pull rod 20 between two fixing seats 22. Through the cooperation of the second fixing rod 19, the pull rod 20 and the first compression spring 21, one side of the limiting plate 9 can be successively clamped into the corresponding limiting groove 13 when the cross beam 2 moves upward;

[0026] As Figure 2 、 Figures 4-6As shown, an inner toothed ring 23 is fixedly installed on one side of the limit plate 9 away from the second fixed rod 19, a rotation groove 24 is provided on one side of the gear 10, and a mounting groove 25 is provided on the inner side of the rotation groove 24. The gear 10 is inserted and installed on the fixed tube 18 on one side of the limit plate 9 and is limited by a retaining spring. Two countersunk holes 26 are provided in the mounting seat 11, and a plurality of locking teeth 28 are fixedly installed on the top of the limit shaft 30. An end block 27 is fixedly installed on the bottom of the limit shaft 30. The limit shaft 30 is inserted and installed in the countersunk hole 26, and a second compression spring 29 is provided on the limit shaft 30 located at the top of the countersunk hole 26 and the difficulty of the end block 27 bracket. When the gear 10 rotates at a high speed, the centrifugal force generated by the rotation of the gear 10 can be used to throw the limit shaft 30 out a certain distance, so that the locking teeth 28 are stuck in the inner side of the inner toothed ring 23, which can drive the limit plate 9 to rotate and quickly stick into the corresponding limit groove 13.

[0027] It should be noted that the utility model is a lift with an anti-falling function. When the lifting mechanism 3 controls the cross beam 2 to move up between the two columns 1, the two cross beams 2 can synchronously drive the two supporting plates 4 to move up, and the limit plate 9 is rotatably installed on the fixed shaft 8 through the fixed tube 18, and the force of the first compression spring 21 directly acts on the retaining spring on the outside of the pull rod 20, so that the pull rod 20 cooperates with the second fixed rod 19 to always make one side of the limit plate 9 contact with one side of the side plate 12. Therefore, when the cross beam 2 moves up between the two columns 1, one side of the limit plate 9 can be sequentially inserted into the corresponding limit groove 13, which can prevent the cross beam 2 from falling suddenly.

[0028] When the crossbeam 2 descends, the control handle 6 can be manually rotated. Then, the control handle 6 drives the first connecting rod 5 to rotate. One of the first connecting rods 5 drives the other first connecting rod 5 to rotate synchronously through the connecting seats 7 on both sides and the second connecting rod 15. Thus, the connecting seats 7 on both sides of the two first connecting rods 5 also respectively pull the corresponding first fixing rod 16 to one side through the third connecting rod 17, enabling the first fixing rod 16 to drive the limiting plate 9 to rotate on the fixed shaft 8, so that one side of the limiting plate 9 disengages from the limiting groove 13. Then, the lifting mechanism 3 can be controlled by an external controller to lower the crossbeam 2. If the lifting mechanism 3 suddenly fails during the descent and the operator's hand has not released the control handle 6, the crossbeam 2 drives the limiting plate 9 to continue to move downward through the fixed shaft 8. At the same time, the limiting plate 9 drives the gear 10 to move downward through the fixed tube 18. The gear 10 rotates at a high speed due to meshing with the tooth block 14 on one side of the side plate 12. Thus, the centrifugal force generated by the rotation of the gear 10 flings the limiting shaft 30 towards the inner side of the internal tooth groove ring 23, and multiple locking teeth 28 at the top of the limiting shaft 30 quickly engage into the inner side of the internal tooth groove ring 23, enabling the gear 10 to drive the internal tooth groove ring 23 to rotate. The internal tooth groove ring 23 drives the limiting plate 9 to rotate, so that one side of the limiting plate 9 can quickly abut against one side of the side plate 12. After the crossbeam 2 drives the limiting plate 9 to continue to move downward, the limiting plate 9 quickly snaps into the corresponding limiting groove 13, forcibly limiting the downward movement of the crossbeam 2.

[0029] 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 lift with a fall prevention function, characterized in that: It includes four columns (1). On one side inside the column (1), a side plate (12) is fixedly installed. A cross beam (2) is movably connected between the two columns (1). Lifting mechanisms (3) are fixedly installed on both sides of the cross beam (2). Two fixing seats (22) are also fixedly installed on both sides inside the cross beam (2). Two supporting plates (4) are fixedly installed on the two cross beams (2). A first connecting rod (5) is movably installed between the two cross beams (2) on one side of the supporting plate (4). Connecting seats (7) are respectively fixedly installed on both sides of the first connecting rod (5). A fixed shaft (8) is also fixedly installed on the cross beam (2) at a position below the lifting mechanism (3). A limiting plate (9) is movably installed on the outer side of the fixed shaft (8). A gear (10) is movably installed on one side of the limiting plate (9). A mounting seat (11) is fixedly installed on one side inside the gear (10). Two limiting shafts (30) are movably installed inside the mounting seat (11).

2. The lift with a fall prevention function according to claim 1, characterized in that: A plurality of limiting grooves (13) are formed inside the side plate (12). A plurality of tooth blocks (14) are fixedly installed on the side plate (12) on one side of the limiting groove (13).

3. A lift with a fall prevention function according to claim 2, characterized in that: A control handle (6) is fixedly installed on one side of the first connecting rod (5). A second connecting rod (15) is rotatably connected between the two connecting seats (7) on one side of the cross beam (2).

4. A lift with a fall prevention function according to claim 3, characterized in that: A fixed tube (18) is fixedly installed at the central position of the limiting plate (9). A first fixed rod (16) is axially connected to the fixed tube (18) on one side of the limiting plate (9). A second fixed rod (19) is fixedly installed on the fixed shaft (8) at a position above the first fixed rod (16). The limiting plate (9) is rotatably installed on the outer side of the fixed shaft (8) through the fixed tube (18). A third connecting rod (17) is provided between the first fixed rod (16) and the connecting seat (7). One side of the third connecting rod (17) is rotatably installed on one side of the connecting seat (7). The other side of the third connecting rod (17) is inserted through one side of the first fixed rod (16).

5. The lift with a fall prevention function according to claim 4, characterized in that: A pull rod (20) is inserted through the second fixed rod (19). The pull rod (20) has an L-shaped structure. The side of the pull rod (20) away from the second fixed rod (19) is inserted through the fixing seat (22). A first compression spring (21) is also sleeved on the pull rod (20) between the two fixing seats (22).

6. A lift with a fall prevention function according to claim 5, characterized in that: An internal tooth groove ring (23) is fixedly installed on the side of the limiting plate (9) facing away from the second fixed rod (19).

7. The lift with a fall prevention function according to claim 6, characterized in that: A rotating groove (24) is formed on one side of the gear (10), and an installation groove (25) is formed inside the rotating groove (24). The gear (10) is inserted and installed on a fixed tube (18) on one side of the limit plate (9) and is limited by a snap ring. Two counterbores (26) are formed in the mounting seat (11). A plurality of locking teeth (28) are fixedly installed at the top of the limit shaft (30), and an end block (27) is fixedly installed at the bottom of the limit shaft (30). The limit shaft (30) is inserted and installed in the counterbore (26). A second compression spring (29) is sleeved on the limit shaft (30) between the inner top of the counterbore (26) and the end block (27).

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