Counterweight device for a machine-room-less elevator car

Abstract

The utility model discloses an inorganic room elevator car's counter pulley device, including counter pulley device ontology, it is by two identical mounting plate, car counter pulley axle and mounting beam composition, two mounting plates are arranged with interval between the front -back arrangement, respectively set up corresponding mounting hole on two mounting plates, car counter pulley axle passes mounting hole of two mounting plates in proper order and partially exposed on two mounting plates after, set up limit mechanism on the exposed part of car counter pulley axle, car counter pulley is set up on car counter pulley axle, and the car counter pulley is hung with steel wire rope, and the car counter pulley's just above between two mounting plates fixedly has mounting beam near the position of top portion respectively, and two mounting plates are inserted after long strip counter pulley beam and are hung on counter pulley beam through mounting beam, just below car counter pulley is located on two mounting plates and is provided with protection mechanism. The utility model discloses whole simple and reasonable structure, practical convenient and safe.

Description

Technical Field

[0001] This utility model belongs to the field of elevator accessories technology, and relates to a reverse rope pulley device for a machine room-less elevator car. More specifically, it designs a reverse rope pulley device for a machine room-less elevator car with anti-shaft breakage protection. Background Technology

[0002] The top-floor anti-reverse sheave is a type of fixed pulley used in elevators, typically located on the top-floor anti-reverse sheave beam. As needed, the traction rope passes around the top-floor anti-reverse sheave, and in conjunction with the top-floor anti-reverse sheave, a large traction ratio can be achieved. Its function is to reduce the output power and torque of the traction machine.

[0003] The current national standard for elevators, GB / T 7588.1-2020, specifies in section 5.5.8, regarding traction sheaves, pulleys, and sprockets within the hoistway, that traction sheaves, pulleys, and sprockets may be fixed within the hoistway at a position higher than the ground floor leveling point if the following conditions are met:

[0004] a) It should have a retaining device to prevent the pulley and sprocket from falling in the event of mechanical failure. This device should be able to support the pulley or sprocket and the suspended load; therefore, the latest elevator standards require a shaft breakage protection device.

[0005] Existing anti-cord sheave devices typically include two vertical clamping plates, a sheave shaft rotatably connected to the clamping plates, and an anti-cord sheave mounted on the sheave shaft, all fixed to the anti-cord sheave beam via the bottom of the clamping plates. During elevator operation, if the tension in the wire rope suddenly increases beyond the sheave shaft's capacity, the sheave shaft may break, causing the anti-cord sheave and wire rope to detach. However, the elevator control system may not stop the elevator due to the anti-cord sheave device malfunction, potentially leading to a fall of the elevator car and counterweight.

[0006] To address this issue, a reverse rope sheave device for machine-room-less elevator cars is designed to overcome the aforementioned problems. Utility Model Content

[0007] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a simple, reasonable, stable, safe and reliable anti-rope wheel device for machine room-less elevator cars.

[0008] This utility model is achieved through the following technical solution: a reverse rope sheave device for a machine room-less elevator car, comprising a reverse rope sheave device body, the reverse rope sheave device body consisting of two identical mounting plates, a car reverse rope sheave shaft, and mounting beams. The two mounting plates are arranged front to back with a gap between them, and corresponding mounting holes are opened on the two mounting plates respectively. The car reverse rope sheave shaft passes through the mounting holes of the two mounting plates in sequence and is partially exposed on the two mounting plates. A limit mechanism is provided on the exposed part of the car reverse rope sheave shaft to prevent the car reverse rope sheave shaft from rotating. A car reverse rope sheave is sleeved on the car reverse rope sheave shaft between the two mounting plates, and a steel wire rope is suspended on the car reverse rope sheave. Mounting beams are fixed directly above the car reverse rope sheave, between the two mounting plates, near the top. The two mounting plates are inserted into the long strip-shaped reverse rope sheave beam and suspended on the reverse rope sheave beam through the mounting beam. A protective mechanism is provided directly below the car reverse rope sheave on the two mounting plates.

[0009] Preferably, the protection mechanism is a breakage protection shaft, which consists of two shafts located directly below the car's anti-breakage sheave. These shafts are at the same height and arranged side-by-side, with the distance between them being less than the diameter of the car's anti-breakage sheave. The two mounting plates each have corresponding shaft holes for the breakage protection shafts. Both ends of each shaft are installed within the shaft holes of the two mounting plates. With these two shafts, the car's anti-breakage sheave can be supported and prevented from falling when it falls onto the shafts, thus preventing accidents caused by shaft breakage.

[0010] Preferably, the car deflector is provided with a concave groove for winding a steel wire rope, and an anti-jump rod is provided on each of the left and right adjacent positions of the car deflector. Each anti-jump rod passes through the through holes opened on the two mounting plates and is fixed between the two mounting plates. The two anti-jump rods are used to prevent the steel wire rope from detaching from the car deflector when the elevator encounters an unexpected working condition.

[0011] Preferably, the limiting mechanism is a clamping plate installed on the outer side of two mounting plates respectively. The lower part of the clamping plate is provided with an arc-shaped limiting groove. The two clamping plates are fixed to the mounting plates by bolts respectively, and the arc-shaped limiting groove on each clamping plate after fixing is in close contact with the exposed part of the car anti-rope wheel axle.

[0012] Preferably, a mounting bracket is fixed between the two mounting plates near the bottom. This mounting bracket is positioned directly below the anti-breakage protection shaft. A deformation detection device is installed inside the mounting bracket to provide an early warning when the car anti-corrosion sheave shaft is excessively deformed.

[0013] The beneficial effects of this utility model are as follows:

[0014] The anti-reverse rope sheave device for machine-room-less elevator cars designed in this utility model features a breakage-prevention protective shaft. This shaft prevents the anti-reverse rope sheave from falling even if the shaft breaks, thus preventing accidents caused by shaft breakage. Even after the anti-reverse rope sheave shaft falls onto the breakage-prevention protective shaft, the shaft can still rotate freely, improving safety. The deformation detection device in this utility model serves as an early warning when the anti-reverse rope sheave is significantly deformed, enabling predictive maintenance. Attached Figure Description

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

[0016] Figure 2 This is a side view of the present invention. Detailed Implementation

[0017] To enable those skilled in the art to more clearly understand the purpose, technical solution and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] The present invention will now be described in detail with reference to the accompanying drawings: Figure 1-2 As shown, a deflector device for a machine-room-less elevator car includes a deflector device body, which consists of two identical mounting plates 1, a car deflector shaft 2, and a mounting beam 3. The two mounting plates 1 are arranged front to back with a gap between them, and corresponding mounting holes 4 are opened on the two mounting plates 1 respectively. The car deflector shaft 2 passes through the mounting holes 4 of the two mounting plates 1 in sequence, and its part is exposed on the two mounting plates 1. A limit switch is installed on the exposed part of the car deflector shaft 2. A structure is used to prevent the car anti-cord sheave shaft 2 from rotating. A car anti-cord sheave 5 is sleeved on the car anti-cord sheave shaft 2 between two mounting plates 1. A steel wire rope 6 is suspended on the car anti-cord sheave 5. A mounting beam 3 is fixed directly above the car anti-cord sheave 5, between the two mounting plates 1 and near the top. The two mounting plates 1 are inserted into the long strip anti-cord sheave beam 7 and then suspended on the anti-cord sheave beam 7 through the mounting beam 3. A protective mechanism is set directly below the car anti-cord sheave 5 on the two mounting plates 1.

[0020] The protective mechanism is a breakage prevention shaft 8, which consists of two shafts located directly below the car's anti-breakage sheave 5. They are arranged side-by-side at the same height, and the distance between the two shafts is less than the diameter of the car's anti-breakage sheave 5. The two mounting plates 1 are respectively provided with shaft holes 15 corresponding to the breakage prevention shafts 8. Both ends of each shaft are installed in the shaft holes 15 of the two mounting plates 1. With the two shafts 8, the car's anti-breakage sheave 5 can be supported and prevented from falling when it falls onto the shafts, thus preventing accidents caused by shaft breakage. It can also prevent jamming.

[0021] The car deflector 5 is provided with a concave groove for winding the steel wire rope 6. An anti-jump rod 9 is provided on each of the left and right adjacent positions of the car deflector 5. Each anti-jump rod 9 passes through the through holes 10 opened on the two mounting plates 1 and is fixed between the two mounting plates 1. The two anti-jump rods 9 are used to prevent the steel wire rope 6 from detaching from the car deflector 5 when the elevator encounters an unexpected working condition.

[0022] The limiting mechanism consists of a clamping plate 11 installed on the outer side of two mounting plates 1. The lower part of the clamping plate 11 is provided with an arc-shaped limiting groove 12. The two clamping plates 11 are fixed to the mounting plates 1 by bolts, and the arc-shaped limiting groove 12 on each clamping plate 11 after fixing is in close contact with the exposed part of the car anti-rope wheel axle 2.

[0023] A mounting bracket 13 is fixed between the two mounting plates 1 near the bottom. This mounting bracket 13 is positioned directly below the anti-breakage protection shaft 8. A deformation detection device 14 is installed inside the mounting bracket 13 to provide an early warning when the car anti-corrosion sheave shaft 2 is excessively deformed. The deformation detection device of this utility model is a conventional deformation detection switch or a conventional device that can achieve the above functions, so it will not be explained in detail.

[0024] The anti-reverse rope sheave device for machine-room-less elevator cars designed in this utility model features a breakage-prevention protective shaft. This shaft prevents the anti-reverse rope sheave from falling even if the shaft breaks, thus preventing accidents caused by shaft breakage. Even after the anti-reverse rope sheave shaft falls onto the breakage-prevention protective shaft, the shaft can still rotate freely, improving safety. The deformation detection device in this utility model serves as an early warning when the anti-reverse rope sheave is significantly deformed, enabling predictive maintenance.

[0025] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A reversing sheave device for a machine-room-less elevator car, comprising a reversing sheave device body, characterized in that: The main body of the anti-cord sheave device consists of two identical mounting plates (1), a car anti-cord sheave shaft (2), and a mounting beam (3). The two mounting plates (1) are arranged front to back with a gap between them. Corresponding mounting holes (4) are opened on the two mounting plates (1). The car anti-cord sheave shaft (2) passes through the mounting holes (4) of the two mounting plates (1) in sequence, and its rear part is exposed on the two mounting plates (1). A limit mechanism is provided on the exposed part of the car anti-cord sheave shaft (2) to prevent the car anti-cord sheave shaft (2) from rotating. The car anti-rope wheel (5) is fitted on the car anti-rope wheel axle (2) between the two mounting plates (1). A steel wire rope (6) is suspended on the car anti-rope wheel (5). A mounting beam (3) is fixed on the car anti-rope wheel (5) at the top position between the two mounting plates (1). The two mounting plates (1) are inserted into the long strip anti-rope wheel beam (7) and then suspended on the anti-rope wheel beam (7) through the mounting beam (3). A protective mechanism is set on the two mounting plates (1) directly below the car anti-rope wheel (5).

2. The anti-cord sheave device for a machine-room-less elevator car according to claim 1, characterized in that: The protection mechanism is a breakage protection shaft (8). The breakage protection shaft (8) consists of two shafts located directly below the car deflector (5), with the same height and arranged side to side. The distance between the two breakage protection shafts (8) is less than the diameter of the car deflector (5). The two mounting plates (1) are respectively provided with shaft holes (15) corresponding to the breakage protection shafts (8). The two ends of each breakage protection shaft (8) are respectively installed in the shaft holes (15) of the two mounting plates (1). With the two breakage protection shafts (8), when the car deflector (5) falls onto the breakage protection shaft (8), it can support the car deflector (5) and prevent it from falling, thus preventing accidents caused by shaft breakage.

3. The anti-cord sheave device for a machine-room-less elevator car according to claim 1 or 2, characterized in that: The car deflector (5) is provided with a concave groove for winding a steel wire rope (6). An anti-jump rod (9) is provided on each of the adjacent positions on the left and right sides of the car deflector (5). Each anti-jump rod (9) passes through the through holes (10) opened on the two mounting plates (1) and is fixed between the two mounting plates (1). The two anti-jump rods (9) are used to prevent the steel wire rope (6) from detaching from the car deflector (5) when the elevator encounters an unexpected working condition.

4. The anti-cord sheave device for a machine-room-less elevator car according to claim 1, characterized in that: The limiting mechanism is a clamping plate (11) installed on the outer side of two mounting plates (1). The lower part of the clamping plate (11) is provided with an arc-shaped limiting groove (12). The two clamping plates (11) are fixed to the mounting plate (1) by bolts, and the arc-shaped limiting groove (12) on each clamping plate (11) after fixing is close to the exposed part of the car anti-rope wheel axle (2).

5. The anti-cord sheave device for a machine-room-less elevator car according to claim 2 or 4, characterized in that: A mounting bracket (13) is fixed between the two mounting plates (1) near the bottom. The mounting bracket (13) is placed directly below the anti-breakage protection shaft (8). A deformation detection device (14) is installed inside the mounting bracket (13) to provide an early warning when the car anti-rope wheel shaft (2) is deformed too much.

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