Elevator cage electric cage curtain door with counterweight mechanism

Abstract

The utility model discloses an elevator cage electric cage curtain door with a balance weight mechanism. The elevator cage electric cage curtain door comprises inner pulleys and outer pulleys, wherein the inner pulleys are mounted on a cross beam and located on the outer sides of side chain wheels, and the outer pulleys are located on the outer sides of the inner pulleys. A balancing weight capable of sliding up and down is installed in a guide rail groove of the vertical guide rail, a rope connected with the balancing weight bypasses the outer pulley and the inner pulley on the side where the rope is located and penetrates into rope holes in the first transverse rod to the nth transverse rod from top to bottom, and the other end of the rope is connected with the nth transverse rod. The lifting weight of the cage curtain door is changed by adopting a method of increasing the balance weight, and the load of the motor is reduced. A rope used for lifting the cross rod is a short-pitch roller chain and has the advantages of being higher in corrosion resistance, larger in bearing pulling force, higher in reliability and the like; the elastic deformation of the roller chain is small, and the roller chain is stacked more smoothly during winding, so that the two sides of the curtain door cross rod can be ensured to be synchronous during lifting, and the curtain door cross rod is not easy to block.

Description

Technical Field

[0001] This utility model relates to an electric curtain door for a hoist cage, and more particularly to an electric curtain door for a hoist cage with a counterweight mechanism. Background Technology

[0002] Vertical shaft hoists typically use cages as containers for personnel going up and down. Traditional cages are equipped with P-type doors or curtain doors on both sides as personnel protection equipment. If an electric hoist is used, the cage doors must be curtain doors. Due to the high humidity in mining areas, curtain doors usually require heavy stainless steel curtain rods, resulting in a high power output and energy consumption for the lifting drive motor. For example, in a gold mine of Shandong Gold Group, the cage of the ventilation shaft hoist is 2.2m wide. Because the ventilation shaft is an intake shaft with high humidity, ordinary steel pipes cannot be used, so stainless steel curtain rods are required. The total weight of the stainless steel curtain rods is about 15kg. When using an electric hoist, this not only increases the load on the motor but also makes it prone to electrical failures. Maintenance requires manual lifting, which is time-consuming and labor-intensive.

[0003] On the other hand, as existing technology, the lifting ropes for stainless steel curtain rods in mine hoists generally use steel wire ropes or nylon braided ropes. In practice, the following disadvantages have been found with steel wire ropes: First, due to their high elasticity, steel wire ropes are prone to jumping out of the rope groove in a slack state, requiring a weight to stretch them, which is difficult to adapt to the curtain door mechanism; Second, conventional steel wire ropes are round, easily squeezed and jammed when wound in the chain groove, and uneven winding diameter can lead to asynchronous rising of the two sides of the crossbar; Third, steel wire ropes are composed of fine filaments, making them more prone to breakage under the corrosive moisture of the mine shaft. Nylon braided ropes mainly have the following disadvantages: First, when used in mine hoist curtain doors, they may be scratched by sharp metal, resulting in lower reliability; Second, nylon ropes also suffer from high elasticity and uneven winding, easily leading to asynchronous rising of the two ends of the crossbar. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an electric cage curtain door for a hoisting machine with a counterweight mechanism. First, the motor load is reduced and energy consumption is lowered by using a counterweight. Second, a more suitable stainless steel curtain rod lifting rope is selected to overcome the problems of excessive elasticity and uneven winding of existing steel wire ropes or nylon braided ropes.

[0005] The technical solution of this utility model is as follows:

[0006] An electric cage door for a hoist with a counterweight mechanism includes a crossbeam with vertical guide rails and a vertical optical axis connected to both ends via a crossbeam frame. It also includes N parallel horizontal bars arranged vertically. Flexible connectors connect the uppermost horizontal bar to the crossbeam and to adjacent horizontal bars. Both ends of each horizontal bar are slidably connected to the vertical optical axis on their respective sides. The horizontal bars have chain holes and rope holes. A motor and a take-up / release chain wheel are fixedly mounted on the crossbeam and are interconnected. The crossbeam also has a main sprocket and two side sprockets on either side of the main sprocket. Two chains extending from the take-up / release chain wheels pass over the main sprocket and then over the two side sprockets respectively. The side sprockets are then inserted into the chain holes on all the crossbars, with the bottom end connected to the lowest crossbar. The canopy door also includes an inner pulley installed on the crossbeam and located outside the side sprockets, and an outer pulley located outside the inner pulleys. The vertical guide rail has a guide rail groove perpendicular to the horizontal plane, and a counterweight block that can slide up and down along the guide rail groove is installed in the guide rail groove. The rope connected to the counterweight block passes around the outer and inner pulleys on the side and is inserted into the rope holes on the first to nth crossbars from top to bottom, with the other end connected to the nth crossbar. Where N and n are natural numbers, and N > n > 1.

[0007] Preferably, the chain is selected with a pitch of 9.525 mm, a width of 14.1 mm, and a thickness of 6.35 mm.

[0008] Preferably, the power input shaft and power output shaft of the reducer are arranged perpendicular to each other; the motor output shaft is connected to the power input shaft of the reducer through a coupling, and the chain shaft for winding and unwinding the chain is connected to the power output shaft of the reducer through a coupling.

[0009] Preferably, N is 6 to 10.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] First, this utility model adds a counterweight reduction mechanism to the tank curtain door. By adding counterweight, the lifting weight of the tank curtain door is changed, which reduces the load on the motor, lowers the electrical failure rate, reduces the impact damage to the equipment, and reduces the labor intensity of workers.

[0012] Secondly, this utility model uses two sets of counterweights. The roller chains connected to the counterweights are connected to both sides of the crossbar through guide pulleys, so that the crossbar is subjected to more even and balanced force, which can better ensure that the left and right ends of the canopy door remain horizontal and will not get stuck when opening and closing.

[0013] Third, this utility model selects roller chains as the lifting rope for stainless steel curtain rods. It has advantages such as stronger corrosion resistance, greater tensile strength, and higher reliability; compared to steel wire rope and nylon rope, roller chains have less elastic deformation and stack more evenly when wound, better ensuring synchronous lifting and lowering of both sides of the curtain rod, and preventing the curtain rod from easily getting stuck.

[0014] Fourth, this utility model has N horizontal bars, with the top one being the first bar and the bottom one being the Nth bar. The other end of the rope connecting the counterweight is connected to the nth (N>n>1) horizontal bar. When closing the door, the weight of the horizontal bar below the nth bar ensures that all the horizontal bars can be more easily positioned. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0016] Figure 2 yes Figure 1 Enlarged schematic diagram of part A.

[0017] Explanation of reference numerals in the attached diagram: 1. Crossbeam; 2. Main sprocket frame; 3. Retracting / unretracting chain plate; 4. Reducer; 5. Motor; 6. Vertical optical axis; 7. Chain; 8. Flexible connector; 9. Crossbar; 9-1. Connecting hole; 9-2. Chain hole; 9-3. Rope hole;

[0018] 10. Vertical guide rail; 11. Counterweight; 12. Rope; 13. Crossbeam frame; 14. Side sprocket frame; 15. Outer pulley frame; 16. Outer pulley; 17. Inner pulley frame; 18. Inner pulley; 19. Side sprocket; 20. Main sprocket. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1 The embodiment of the canister door of this utility model includes a crossbeam 1, the left and right ends of which are respectively connected to a vertical guide rail 10 and a vertical optical axis 6 located inside the vertical guide rail 10 via a crossbeam frame 13. The crossbeam 1 is horizontal, and both the vertical guide rail 10 and the vertical optical axis 6 are perpendicular to the horizontal plane.

[0021] This embodiment also includes seven horizontal bars 9 arranged parallel to each other and vertically. Each horizontal bar 9 has a guide hole at its left and right ends, or an O-ring at each end. The vertical optical axis 6 passes through the guide hole or O-ring on its respective side. The horizontal bar 9 can slide up and down under the guidance of the vertical optical axis 6. The horizontal bars 9 also have connecting holes 9-1, chain holes 9-2, and rope holes 9-3. The connecting holes 9-1 on all horizontal bars 9 are vertically aligned (i.e., the left and right positions are the same, but the heights are different), the chain holes 9-2 on all horizontal bars 9 are vertically aligned, and the rope holes 9-3 on all horizontal bars 9 are vertically aligned.

[0022] The uppermost crossbar 9 is connected to the crossbeam 1, and adjacent crossbars 9 are connected by flexible connectors 8 of equal length. These flexible connectors 8 may be circular chains or ropes. The uppermost flexible connector 8 is connected to the crossbeam 1 at its upper end, and the ends of other flexible connectors 8 are connected to their respective crossbeams 1 through the connecting holes 9-1. The flexible connectors 8 serve to suspend the crossbars 9. When a circular chain is used as the flexible connector 8, the chain passes through the connecting holes 9-1 on all crossbars 9 and is connected to the corresponding crossbar 9 through the connecting holes 9-1. The upper end is connected to the crossbeam 1, and the lower end is connected to the lowermost crossbar 9. The circular chains between adjacent crossbars 9 are of equal length.

[0023] A motor 5 and a take-up / release chain disc 3 are fixedly mounted on the crossbeam 1 and are connected to each other for transmission. The motor 5 drives the chain disc shaft of the take-up / release chain disc 3 to rotate through a reducer 4. Specifically, the power input shaft and power output shaft of the reducer 4 are arranged perpendicular to each other. The output shaft of the motor 5 is connected to the power input shaft of the reducer 4 through a coupling, and the chain disc shaft of the take-up / release chain disc 3 is connected to the power output shaft of the reducer 4 through a coupling.

[0024] The crossbeam 1 is also fixedly mounted with a main sprocket frame 2 and a side sprocket frame 14 on each side of the main sprocket frame 2. The main sprocket frame 2 is equipped with a main sprocket 20, and the side sprocket frames 14 are equipped with side sprockets 19. Two chains 7 are led out from the take-up and release chain disc 3. The two chains 7 pass around the main sprocket 20 and then pass around the side sprockets 19 on the left and right sides respectively. Then they are respectively inserted into the side chain holes 9-2 on all the crossbars 9, and the bottom ends are connected to the bottommost crossbar 9.

[0025] The chain 7 of this invention is preferably a short-pitch roller chain made of stainless steel. The chain 7 can be selected with different strengths according to requirements. In this embodiment, a 3-point size chain (pitch of 9.525mm) is used, with a width of 14.1mm and a thickness of 6.35mm. This chain can withstand a longitudinal tensile force exceeding 100kg. In this embodiment, two roller chains can withstand a tensile force of approximately 200kg.

[0026] When motor 5 rotates forward or reverse, the chain retractor 3 lifts or lowers chain 7 by winding or releasing. When chain 7 is lifted, it moves the bottom crossbar 9 upward, and the bottom crossbar 9 then moves the six crossbars above it upward to stack, completing the door opening action; when chain 7 is released, the crossbars 9 fall by their own weight, completing the door closing action.

[0027] Combination Figure 2 This embodiment also includes two inner pulley frames 17 fixedly installed on the crossbeam 1 and located outside the two side sprocket frames 14, and two outer pulley frames 15 fixedly installed on the crossbeam 1 and located outside the two inner pulley frames 17. Inner pulleys 18 are installed on the inner pulley frames 17, and outer pulleys 16 are installed on the outer pulley frames 15. The vertical guide rail 10 has a guide rail groove perpendicular to the horizontal plane. A counterweight 11 capable of sliding up and down along the guide rail groove is installed in the guide rail groove. The counterweight 11 is connected to a rope 12 (such as a steel wire rope). The rope 12 passes around the outer pulley 16 and inner pulley 18 on its side and passes through the rope holes 9-3 on the first to fifth crossbars 9 from top to bottom. The other end is connected to the fifth crossbar 9. The counterweight 11 is used to offset part of the weight of the crossbars 9, reducing the power consumption of the motor.

[0028] In this invention, the number of crossbars 9 is set to N, and the crossbar connected to the rope 12 is defined as the nth crossbar from top to bottom. Both N and n are natural numbers, and N > n > 1. In this embodiment, N = 7 and n = 5.

Claims

1. An electric cage curtain door for a hoist with a counterweight mechanism, wherein the two ends of a crossbeam (1) are respectively connected to a vertical guide rail (10) and a vertical optical axis (6) via a crossbeam frame (13), and also includes N horizontal bars (9) arranged parallel to each other and vertically, with flexible connectors (8) connecting the uppermost horizontal bar (9) to the crossbeam (1) and between adjacent horizontal bars (9), and the two ends of the horizontal bars (9) being slidably connected to the vertical optical axis (6) on their respective sides, characterized in that: The crossbar (9) has chain holes (9-2) and rope holes (9-3); the crossbeam (1) is fixedly equipped with a motor (5) and a take-up / release chain disc (3) that are connected to each other; the crossbeam (1) is also equipped with a main sprocket (20) and a side sprocket (19) on each side of the main sprocket (20); the two chains (7) leading out from the take-up / release chain disc (3) pass around the main sprocket (20) and then pass around the side sprockets (19) on both sides respectively, and then pass through the corresponding side chain holes (9-2) on all the crossbars (9), and the bottom ends are connected to the lowest crossbar (9); the canopy door also includes a chain hole (9-2) installed on the crossbeam (1) The vertical guide rail (10) has a guide rail groove that runs perpendicular to the horizontal plane, and a counterweight (11) that can slide up and down along the guide rail groove is installed in the guide rail groove; the rope (12) connected to the counterweight (11) passes around the outer pulley (16) and the inner pulley (18) on the side and passes through the rope hole (9-3) on the first to nth crossbar (9) from top to bottom, and the other end is connected to the nth crossbar (9); where N and n are natural numbers, and N > n > 1.

2. The electrically operated cage door of the hoist cage with counterweight mechanism according to claim 1, characterized in that: The chain (7) is selected with a pitch of 9.525 mm, a width of 14.1 mm, and a thickness of 6.35 mm.

3. The electric cage door with counterweight mechanism for the cage of the hoist as claimed in claim 1 or 2, characterized in that: The motor (5) drives the chain shaft of the take-up and release chain disc (3) to rotate through the reducer (4). The power input shaft and the power output shaft of the reducer (4) are set perpendicular to each other. The output shaft of the motor (5) is connected to the power input shaft of the reducer (4) through a coupling. The chain shaft of the take-up and release chain disc (3) is connected to the power output shaft of the reducer (4) through a coupling.

4. The electric cage door with counterweight mechanism for the cage of the elevator as claimed in claim 1 or 2, characterized in that: N can be 6 to 10.

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