Anti-falling elevator

Abstract

The utility model relates to the technical field of lifting equipment, in particular to an anti-falling elevator, which comprises a lifting box body, two racks, two guide structures, a plurality of hydraulic cylinders and a crankshaft, the crankshaft comprises a shaft body, a plurality of cranks and two gears connected with the two ends of the shaft body respectively. The two racks are respectively arranged on the two guide structures; the lifting box body can be connected in a lifting and sliding mode relative to the two guide structures. The hydraulic cylinder comprises a cylinder body rotationally connected with the top end of the lifting box body and a piston assembly movably connected with the cylinder body; piston assemblies of the multiple hydraulic cylinders are hinged to the multiple cranks correspondingly. The utility model has the advantages of low production cost and compact structure. The multiple hydraulic cylinders alternately stretch out and draw back to drive the shaft body to rotate, and the shaft body is matched with the gear and the rack to drive the lifting box to stably ascend and descend. And the lifting box body is driven by the hydraulic cylinder and the crank so as not to fall suddenly, so that the safety of the lifting device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting equipment, in particular to an anti-falling hoist. Background Art

[0002] Hoists are large-scale mechanical equipment that transports by changing potential energy, such as mine hoists, dam hoists, etc. In a broad sense, elevators, overhead cranes, winches, stabilizers, cranes, hoists, etc. can all be called hoists. Hoists generally refer to large-scale mechanical equipment with high power and strong lifting capacity.

[0003] The patent application number is CN202120760196.X, and the patent application name is a chain-type lifting scaffold lifting device. It discloses a support column, a mounting base plate is fixedly installed on the outer surface of the lower end of the support column, a motor mounting frame is fixedly installed on the outer side of the support column, a drive motor is fixedly installed on the upper surface of the motor mounting frame, and a gear mounting seat is fixedly installed on the outer surface of the upper end of the support column. The outer surfaces of the drive motor and the gear mounting seat are provided with a chain transmission mechanism. This patent application drives the lifting chain to pull the lifting platform to lift and lower by driving the motor. The lifting chain bears the entire gravity of the lifting platform and the material, and is prone to chain breakage or failure. After the chain breaks, the lifting platform is prone to rapid falling, resulting in material damage or personal injury. Therefore, the defects are very obvious, and a solution is urgently needed. Utility Model Content

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide an anti-fall hoist.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A fall-proof hoist, which comprises a lifting box, two racks, two guide structures, multiple hydraulic cylinders and a crankshaft; the crankshaft comprises a shaft body rotatably arranged at the top end of the lifting box, multiple cranks formed by bending the shaft body and two gears respectively connected to the two ends of the shaft body with keys; the two guide structures are respectively located on both sides of the lifting box, and the two racks are respectively mounted on the two guide structures; the lifting box can slide up and down relative to the two guide structures; the hydraulic cylinder comprises a cylinder body rotatably connected to the top end of the lifting box and a piston assembly movably connected to the cylinder body; the piston assemblies of the multiple hydraulic cylinders are respectively hinged to the multiple cranks, and the multiple piston assemblies can cooperate with each other and extend and retract alternately to drive the shaft body to rotate relative to the lifting box; the two gears are respectively meshed with the two racks.

[0007] Furthermore, the lifting machine also includes a control valve assembly, and the control valve assembly is used to control the flow rate of liquid flowing into or out of the inner cavity of the cylinder body.

[0008] Furthermore, the lifting machine also includes a mounting seat arranged on the lifting box body and a guide wheel rotatably arranged on the mounting seat, and the guide wheel is slidably connected to the guide structure.

[0009] Furthermore, the guide structure includes a plurality of fixed guide rods, the rack is mounted on a guide rod, and the lifting box is slidably connected to two or more guide rods.

[0010] Furthermore, a guide groove is recessed on the guide wheel, and the guide rod protrudes into the guide groove and is slidably connected to the groove wall of the guide groove.

[0011] Beneficial effects of the utility model: the utility model has low production cost and compact structure. The shaft body is driven to rotate by multiple hydraulic cylinders alternately extending and retracting, and the shaft body cooperates with the gear and rack to drive the lifting box to rise and fall stably. The lifting box is driven by the hydraulic cylinder and the crank to prevent sudden fall, thereby improving the safety of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model in a top view.

[0013] Figure 2 It is a schematic diagram of the local structure of the utility model in a front view state.

[0014] Figure 3 It is a partial exploded view of the utility model.

[0015] Figure 4 It is a three-dimensional structural schematic diagram of the lifting box and the guide structure of the utility model.

[0016] Description of reference numerals:

[0017] 1. Lifting box; 2. Rack; 3. Guide structure; 4. Hydraulic cylinder; 5. Crankshaft; 6. Crank; 7. Gear; 8. Cylinder body; 9. Piston assembly; 10. Mounting seat; 11. Guide wheel; 12. Guide rod; 13. Guide groove. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0019] like Figures 1 to 4As shown, the utility model provides an anti-fall hoist, which includes a lifting box 1, two racks 2, two guide structures 3, multiple hydraulic cylinders 4 and a crankshaft 5; the crankshaft 5 includes a shaft body rotatably arranged at the top of the lifting box 1, multiple cranks 6 respectively bent by the shaft body and two gears 7 respectively connected to the two ends of the shaft body by keys; the two guide structures 3 are respectively located on both sides of the lifting box 1, and the two racks 2 are respectively installed on the two guide structures 3; the lifting box 1 can slide relative to the two guide structures 3 to rise and fall, and the racks 2 The length direction is parallel to the sliding direction of the lifting box 1; the hydraulic cylinder 4 includes a cylinder body 8 rotatably connected to the top end of the lifting box 1 and a piston assembly 9 movably connected to the cylinder body 8; one end of the piston assembly 9 can reciprocate in the inner cavity of the cylinder body 8 to adjust the length of multiple piston assemblies 9 that can be extended into or retracted into multiple cylinder bodies 8 respectively; the other ends of the multiple piston assemblies 9 are respectively hinged to the multiple cranks 6, and the multiple piston assemblies 9 can cooperate with each other to alternately extend and retract to drive the shaft body to rotate relative to the lifting box 1; the two gears 7 are respectively engaged with the two racks 2.

[0020] Specifically, the number of the hydraulic cylinder 4 and the crank 6 is set to three. The hoist also includes a control valve assembly, which is used to control the flow of liquid flowing into or out of the inner cavity of the cylinder 8. The hydraulic cylinder 4 can be an oil cylinder. In actual use, the material is placed in the lifting box 1. When it is necessary to drive the material to lift, the control valve assembly controls the liquid to flow into or out of the three cylinders 8 respectively, so that the piston assemblies 9 in the three cylinders 8 are pushed outward or retracted inward by the liquid, so that the shaft body is driven to rotate continuously relative to the lifting box 1 through the telescopic cooperation of the three piston assemblies 9, and the shaft body synchronously drives the two gears 7 at both ends to rotate. Since the rack 2 is fixedly arranged on the guide structure 3, the gear 7 rolls relative to the rack 2 and performs lifting and lowering motion, thereby driving the lifting box 1 and the material to slide relative to the guide structure 3 to lift and lower, thereby realizing the stable lifting of the material. The principle of controlling the hydraulic cylinder 4 to alternately extend and retract to drive the crank 6 to rotate by the control valve assembly is the same or similar to the rotation principle of the existing engine connecting rod mechanism, which will not be repeated here. The utility model has low production cost and compact structure. The shaft body is driven to rotate by alternately extending and retracting multiple hydraulic cylinders 4, and the shaft body cooperates with the gear 7 and the rack 2 to drive the lifting box 1 to stably rise and fall. The lifting box 1 driven by the hydraulic cylinder 4 and the crank 6 will not fall suddenly, thereby improving the safety of the utility model.

[0021] Furthermore, the lifting machine further comprises a mounting seat 10 arranged on the lifting box body 1 and a guide wheel 11 rotatably arranged on the mounting seat 10 , and the guide wheel 11 is slidably connected to the guide structure 3 .

[0022] In actual use, the guide wheel 11 is slidably connected to the guide structure 3, thereby reducing the resistance encountered by the lifting box body 1 during the sliding process.

[0023] Furthermore, the guide structure 3 includes a plurality of fixed guide rods 12, the rack 2 is mounted on one guide rod 12, and the lifting box 1 is slidably connected to two or more guide rods 12. After the guide rods 12 are stably connected to the ground or the table, the lifting box 1 can be slidably connected to the guide rods 12. The guide structure 3 is simple and easy to produce, and the guide rods 12 are easy to fix.

[0024] Furthermore, the guide wheel 11 is provided with a guide groove 13, and the guide rod 12 protrudes into the guide groove 13 and is slidably connected with the groove wall of the guide groove 13. In actual use, the guide groove 13 is added, and the guide rod 12 is clamped in the guide groove 13, so that the sliding connection between the guide rod 12 and the guide groove 13 is more stable, and the guide wheel 11 and the guide rod 12 are not easily misaligned or offset during the sliding process.

[0025] All technical features in this embodiment can be freely combined according to actual needs.

[0026] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A fall-proof hoist, Features: The invention comprises a lifting box (1), two racks (2), two guide structures (3), a plurality of hydraulic cylinders (4) and a crankshaft (5); the crankshaft (5) comprises a shaft body rotatably arranged at the top end of the lifting box (1), a plurality of cranks (6) respectively formed by bending the shaft body and two gears (7) respectively connected to the two ends of the shaft body by keys; the two guide structures (3) are respectively located on both sides of the lifting box (1), and the two racks (2) are respectively installed on the two guide structures (3); the lifting box The body (1) can slide and rise relative to the two guide structures (3); the hydraulic cylinder (4) comprises a cylinder body (8) rotatably connected to the top end of the lifting box body (1) and a piston assembly (9) movably connected to the cylinder body (8); the piston assemblies (9) of the plurality of hydraulic cylinders (4) are respectively hinged to the plurality of cranks (6), and the plurality of piston assemblies (9) can cooperate with each other and extend and retract alternately to drive the shaft body to rotate relative to the lifting box body (1); the two gears (7) are respectively meshed with the two racks (2).

2. A fall-prevention hoist according to claim 1, Features: The lifting machine further comprises a control valve assembly, wherein the control valve assembly is used to control the flow rate of the liquid flowing into or out of the inner cavity of the cylinder body (8).

3. The anti-fall hoist according to claim 1, Features: The lifting machine further comprises a mounting seat (10) arranged on the lifting box body (1) and a guide wheel (11) rotatably arranged on the mounting seat (10), wherein the guide wheel (11) is slidably connected to the guide structure (3).

4. A fall-prevention hoist according to claim 3, Features: The guide structure (3) comprises a plurality of fixed guide rods (12), the rack (2) is mounted on a guide rod (12), and the lifting box (1) is slidably connected to two or more guide rods (12).

5. A fall-prevention hoist according to claim 4, Features: The guide wheel (11) is concavely provided with a guide groove (13), and the guide rod (12) protrudes into the guide groove (13) and is slidably connected to the groove wall of the guide groove (13).

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