Connecting structure between counterweight housing and hoisting rope

Abstract

The utility model discloses a connecting structure between a counterweight housing and a hoist rope, which comprises a counterweight wheel (1) positioned at the top of the counterweight housing, a rotating shaft (2) is axially arranged on the counterweight wheel (1), two ends of the rotating shaft (2) are connected with the counterweight housing through supports, the hoist rope bypasses the bottom of the counterweight wheel (1), a steel sleeve (3) is arranged between the counterweight wheel (1) and the rotating shaft (2), and a bearing (4) is arranged between the steel sleeve (3) and the rotating shaft (2). A plurality of storage tanks (5) are arranged between the steel sleeve (3) and the counterweight wheel (1), and graphite powder is arranged in the storage tanks (5); annular first step grooves (13) are formed in the two ends of an inner hole of the steel sleeve (3), the number of the bearings (4) is two, and the two bearings (4) are located in the two first step grooves (13) respectively. The counterweight wheel has the advantages that the counterweight wheel can be prevented from being locked, and the follow-up maintenance workload and maintenance cost can be reduced.

Description

Technical Field

[0001] The utility model belongs to the field of elevators, and particularly relates to a connection structure between a counterweight frame and a traction rope. Background Art

[0002] The counterweight frame is an important part of an elevator, which is used to balance the load of the car, reduce the energy consumption of the traction machine, and keep the elevator running stably. The lifting of the counterweight frame is driven by the traction rope.

[0003] The existing connection structure between the counterweight frame and the traction rope includes a counterweight wheel located at the top of the counterweight frame. A rotating shaft is arranged axially on the counterweight wheel. The counterweight wheel is connected to the rotating shaft through a bearing. Both ends of the rotating shaft are connected to the counterweight frame through brackets. The traction rope bypasses the bottom of the counterweight wheel. When the traction rope moves, the counterweight frame is driven to lift by the counterweight wheel.

[0004] During the operation of the elevator, the bearing between the counterweight wheel and the rotating shaft works continuously, and the bearing bears the load of the entire counterweight frame, with extremely high working pressure. Especially in large-load freight elevators, the weight of the counterweight frame can even reach more than 1 ton, which results in extremely high pressure between the steel balls inside the bearing and the inner and outer rings of the bearing. During continuous operation, due to reasons such as metal fatigue, wear, or unqualified quality, the steel balls may break, causing the bearing to lock up and the counterweight wheel unable to rotate freely. However, under the inertial movement of the counterweight frame and the car and the continuous drive of the traction machine, the traction rope will still move. The rolling friction between the traction rope and the counterweight wheel becomes sliding friction, resulting in mutual cutting between the counterweight wheel and the traction rope, increasing the workload and maintenance cost for subsequent maintenance. Not only the bearing needs to be replaced, but also the traction rope and the counterweight wheel may need to be replaced. Content of the Utility Model

[0005] The purpose of the utility model is to provide a connection structure between a counterweight frame and a traction rope. The utility model has the advantage of being able to avoid the locking of the counterweight wheel, and can reduce the subsequent maintenance workload and maintenance cost.

[0006] The technical solution of the utility model: A connection structure between a counterweight frame and a traction rope includes a counterweight wheel located at the top of the counterweight frame. A rotating shaft is arranged axially on the counterweight wheel. Both ends of the rotating shaft are connected to the counterweight frame through brackets. The traction rope bypasses the bottom of the counterweight wheel. A steel sleeve is arranged between the counterweight wheel and the rotating shaft. A bearing is arranged between the steel sleeve and the rotating shaft. A plurality of storage grooves are arranged between the steel sleeve and the counterweight wheel, and graphite powder is arranged in the storage grooves.

[0007] In the aforementioned connection structure between the counterweight frame and the traction rope, annular first step grooves are arranged at both ends of the inner hole of the steel sleeve. There are two bearings, and the two bearings are respectively located in the two first step grooves.

[0008] In the connection structure between the counterweight frame and the hoisting rope described above, annular second step grooves are provided at both ends of the outer cylindrical surface of the steel sleeve. The storage groove is opened on the outer peripheral surface of the steel sleeve, and both ends of the storage groove are respectively connected to the two second step grooves. A sealing rubber ring is provided in the second step groove.

[0009] In the connection structure between the counterweight frame and the hoisting rope described above, the storage groove is spiral.

[0010] In the connection structure between the counterweight frame and the hoisting rope described above, limit rings are provided at both axial ends of the counterweight wheel. The limit rings are coaxial with the steel sleeve. The inner hole diameter of the limit ring is smaller than the outer circle diameter of the steel sleeve, and the inner hole diameter of the limit ring is larger than the outer circle diameter of the bearing. A gap with a width less than 0.2 mm is formed between the inner side wall of the limit ring and the end face of the steel sleeve.

[0011] In the connection structure between the counterweight frame and the hoisting rope described above, a bushing matching with the rotating shaft is provided outside the bearing. A tapered sleeve is provided at the inner end of the bushing. The small end of the tapered sleeve is connected to the bushing, and the large end of the tapered sleeve extends to the inner side of the limit ring.

[0012] In the connection structure between the counterweight frame and the hoisting rope described above, a shaft retaining ring for the shaft is provided outside the bearing, and a retaining ring groove matching with the shaft retaining ring for the shaft is provided on the rotating shaft.

[0013] Compared with the prior art, in the present utility model, a steel sleeve is added inside the existing counterweight wheel. The steel sleeve is connected to the rotating shaft through a bearing. When the bearing is stuck, the counterweight wheel can still rotate around the steel sleeve, and the counterweight wheel will not be stuck, avoiding mutual abrasion between the counterweight wheel and the hoisting rope, and reducing the workload and maintenance cost required for subsequent maintenance. Therefore, the present utility model has the advantage of being able to avoid the counterweight wheel from being stuck, and can reduce the subsequent maintenance workload and maintenance cost.

[0014] Further optimized, by providing a storage groove on the outer peripheral surface of the steel sleeve and providing graphite powder in the storage groove, the friction coefficient between the steel sleeve and the counterweight wheel is reduced, creating favorable conditions for the smooth rotation of the counterweight wheel after the bearing is stuck. Moreover, the chemical properties of the graphite powder are stable, it will not deteriorate, and it does not need to be replaced, reducing the subsequent management cost.

[0015] By making both ends of the storage groove penetrate through both ends of the steel sleeve, when the counterweight wheel rotates relative to the steel sleeve, the graphite powder can be fully smeared on the contact surface between the counterweight wheel and the steel sleeve, further reducing the friction coefficient between the steel sleeve and the counterweight wheel.

[0016] By providing a tapered sleeve outside the bearing, the bearing is protected to prevent impurities (including dust and water) in the hoistway from entering the bearing, enabling the bearing to work in a relatively good environment and reducing the possibility of the bearing being stuck. Description of the Drawings

[0017] Figure 1It is a schematic structural view of the utility model.

[0018] Figure 2 It is a schematic structural view of the steel sleeve.

[0019] The marks in the attached drawings are: 1 - counterweight wheel, 2 - rotating shaft, 3 - steel sleeve, 4 - bearing, 5 - storage groove, 6 - sealing rubber ring, 7 - limiting ring, 8 - bush, 9 - taper sleeve, 10 - shaft retaining ring, 11 - rope groove, 12 - second step groove, 13 - first step groove. Specific embodiments

[0020] The following further illustrates the utility model in conjunction with the attached drawings and embodiments, but it shall not be used as the basis for limiting the utility model.

[0021] Embodiment. A connection structure between a counterweight frame and a hoisting rope is as Figure 1 shown, including a counterweight wheel 1 located at the top of the counterweight frame. A rope groove 11 cooperating with the hoisting rope is provided on the outer peripheral surface of the counterweight wheel 1. A rotating shaft 2 is provided axially on the counterweight wheel 1. Both ends of the rotating shaft 2 are connected to the counterweight frame through brackets. The hoisting rope bypasses from the bottom of the counterweight wheel 1. The characteristics are as follows:

[0022] A steel sleeve 3 is provided between the counterweight wheel 1 and the rotating shaft 2. Annular first step grooves 13 are provided at both ends of the inner hole of the steel sleeve 3. Bearings are provided in the first step grooves 13. The steel sleeve 3 is connected to the rotating shaft 2 through the rotating shaft 2. The first step grooves 13 are used to limit the axial inward movement of the bearing 2.

[0023] A plurality of spiral storage grooves 5 are provided on the outer peripheral surface of the steel sleeve 3. Graphite powder is provided in the storage grooves 5. Annular second step grooves 12 are provided at both ends of the outer cylindrical surface of the steel sleeve 3. Both ends of the storage groove 5 are respectively connected to the two second step grooves 12. Sealing rubber rings 6 are provided in the second step grooves 12.

[0024] Limiting rings 7 are provided at both axial ends of the counterweight wheel 1. The limiting rings 7 are connected to the counterweight wheel 1 by screws. The limiting rings 7 are coaxial with the steel sleeve 3. The inner hole diameter of the limiting rings 7 is smaller than the outer circle diameter of the steel sleeve 3, and the inner hole diameter of the limiting rings 7 is larger than the outer circle diameter of the bearing 4. A gap of about 0.1 mm is formed between the inner side wall of the limiting rings 7 and the end face of the steel sleeve 3, which is used to avoid friction between the limiting rings 7 and the bush.

[0025] A bush 8 cooperating with the rotating shaft 2 is provided outside the bearing 4. The bush 8 is tightly connected to the rotating shaft 2. A taper sleeve 9 is provided at the inner end of the bush 8. The small end of the taper sleeve 9 is connected to the bush 8, and the large end of the taper sleeve 9 extends to the inside of the limiting ring 7 and forms a gap with the limiting ring 7.

[0026] A shaft retaining ring 10 is provided outside the bearing 4. A retaining ring groove cooperating with the shaft retaining ring 10 is provided on the rotating shaft 2.

[0027] Working principle: The rotating shaft 2 is connected to the counterweight frame through a bracket and remains stationary all the time. When the traction rope bypasses the rope groove 11 of the counterweight wheel 1 and keeps moving, it drives the counterweight wheel 1 to rotate through friction. Since the friction between the counterweight wheel 1 and the steel sleeve 3 is much greater than the friction when the bearing 4 rotates, the counterweight wheel 1 and the steel sleeve 3 remain relatively stationary, and the counterweight wheel 1 and the steel sleeve 3 rotate around the rotating shaft 2 at the same time. When the bearing 4 fails, the friction of the bearing 4 increases greatly, and the steel sleeve 3 is jammed with the rotating shaft 2. The counterweight wheel 1 can still continue to rotate around the steel sleeve 3, avoiding sliding friction between the traction rope and the counterweight wheel 1, and preventing the counterweight wheel 1 and the traction rope from cutting each other, reducing the workload and maintenance cost for subsequent maintenance.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

Claims

1. A connection structure between a counterweight frame and a traction rope, comprising a counterweight wheel (1) located on the top of the counterweight frame, a rotating shaft (2) being axially arranged on the counterweight wheel (1), both ends of the rotating shaft (2) being connected to the counterweight frame through brackets, and the traction rope being passed around the bottom of the counterweight wheel (1), characterized in that: A steel sleeve (3) is provided between the counterweight wheel (1) and the rotating shaft (2), a bearing (4) is provided between the steel sleeve (3) and the rotating shaft (2), and a plurality of storage grooves (5) are provided between the steel sleeve (3) and the counterweight wheel (1), wherein graphite powder is provided in the storage grooves (5).

2. The connection structure between the counterweight frame and the traction rope according to claim 1, characterized in that: Both ends of the inner hole of the steel sleeve (3) are provided with an annular first step groove (13), and there are two bearings (4), which are respectively located in the two first step grooves (13).

3. The connection structure between the counterweight frame and the traction rope according to claim 1, characterized in that: Both ends of the outer cylindrical surface of the steel sleeve (3) are provided with an annular second step groove (12); the storage groove (5) is opened on the outer peripheral surface of the steel sleeve (3); the two ends of the storage groove (5) are respectively connected to the two second step grooves (12); and a sealing rubber ring (6) is provided in the second step groove (12).

4. The connection structure between the counterweight frame and the traction rope according to claim 3 is characterized in that: The storage tank (5) is spiral-shaped.

5. The connection structure between the counterweight frame and the traction rope according to claim 1, characterized in that: The counterweight wheel (1) is provided with a limiting ring (7) at both axial ends. The limiting ring (7) is coaxial with the steel sleeve (3). The inner diameter of the limiting ring (7) is smaller than the outer diameter of the steel sleeve (3). The inner diameter of the limiting ring (7) is larger than the outer diameter of the bearing (4). A gap with a width of less than 0.2 mm is formed between the inner side wall of the limiting ring (7) and the end face of the steel sleeve (3).

6. The connection structure between the counterweight frame and the traction rope according to claim 5, characterized in that: The outer side of the bearing (4) is provided with a shaft sleeve (8) matched with the rotating shaft (2), the inner side end of the shaft sleeve (8) is provided with a tapered sleeve (9), the small end of the tapered sleeve (9) is connected to the shaft sleeve (8), and the large end of the tapered sleeve (9) extends to the inner side of the limiting ring (7).

7. The connection structure between the counterweight frame and the traction rope according to claim 1, characterized in that: A shaft retaining spring (10) is provided on the outer side of the bearing (4), and a retaining spring groove matching with the shaft retaining spring (10) is provided on the rotating shaft (2).

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