CN210313269U

CN210313269U - Transmission structure of elevator

Info

Publication number: CN210313269U
Application number: CN201920969563.XU
Authority: CN
Inventors: 金惠昌; 钱海军; 赵磊磊; 钱怀印; 付永生
Original assignee: Wuxi Rigid Machinery Co ltd
Current assignee: Wuxi Rigid Machinery Co ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-04-14
Anticipated expiration: 2029-06-25

Abstract

The utility model relates to a transmission structure of a hoisting machine, which comprises a motor, wherein the output end of the motor is connected with a centrifugal speed limiter, the centrifugal speed limiter is connected with a worm gear speed reducer, and the worm gear speed reducer is connected with a rope winding mechanism; the first-stage transmission system adopts worm and gear transmission, and the second-stage transmission system adopts gear transmission; the worm gear speed reducer comprises a speed reduction box body, and the rope winding mechanism comprises a box body; a deep groove ball bearing is rotatably arranged in the reduction box body, a tapered roller bearing is rotatably arranged on one side of the deep groove ball bearing, a worm is rotatably arranged in the deep groove ball bearing and the tapered roller bearing, a gear shaft is rotatably arranged on one side of the worm, and a worm wheel is arranged on the periphery of the gear shaft. The utility model discloses according to the unchangeable job features of axial atress direction of worm when the lifting machine rises or descends, two ends of worm have adopted deep groove ball bearing and tapered roller bearing's cooperation, can improve the axial atress of worm, can also guarantee worm gear's centre-to-centre spacing when having wearing and tearing, improve the life of product.

Description

Transmission structure of elevator

Technical Field

The utility model belongs to construction machinery relates to a transmission structure of lifting machine.

Background

In the prior art, a hoisting machine is a hoisting mechanism driven by friction force between a steel wire rope and a driving wheel, and is mounted on a manned or objective suspension platform for driving the platform to move up and down along the suspended steel wire rope. The common elevator structure takes a motor as a prime mover, a steel wire rope is dragged by a speed reducing system and a rope winding mechanism, a first-stage speed reducing system is in worm gear transmission in common, a second-stage speed reducing system is in internal gear transmission in common, the internal gear transmission is easily limited by size and strength conditions, and transmitted torque is limited, so that the limit working load of the elevator is small. Generally, the speed reducing system and the rope winding mechanism are of an integrated structure, and although the structure is compact, the assembly and the maintenance are troublesome.

Disclosure of Invention

An object of the utility model is to provide a transmission structure of lifting machine can solve the less problem of limit work load of lifting machine, and assembles and maintains the convenience.

According to the utility model provides a technical scheme: a transmission structure of a hoister comprises a motor, wherein the output end of the motor is connected with a centrifugal speed limiter, the centrifugal speed limiter is connected with a worm and gear speed reducer, and the worm and gear speed reducer is connected with a rope winding mechanism; the primary transmission system of the structure adopts worm and gear transmission, and the secondary transmission system adopts gear transmission.

As a further improvement of the utility model, the worm gear speed reducer comprises a speed reduction box body, the rope winding mechanism comprises a box body, a deep groove ball bearing is rotatably arranged in the reduction box body, a tapered roller bearing is rotatably arranged at one side of the deep groove ball bearing, a worm is rotatably arranged in the deep groove ball bearing and the tapered roller bearing, a gear shaft is rotatably arranged at one side of the worm, a worm wheel is arranged on the periphery of the gear shaft, the worm is meshed with the worm wheel, a gear shaft left bearing is arranged on the periphery of one end of the gear shaft, the periphery of the middle part of the gear shaft is provided with a gear shaft intermediate bearing, one end of the box body is connected with a box cover, a cylindrical roller bearing without an inner ring is rotatably arranged in the box cover, the other end of the gear shaft is arranged in the cylindrical roller bearing without the inner ring, an output gear is arranged on the periphery of the other end of the gear shaft, and the output gear is meshed with an external gear driving disc.

As a further improvement of the utility model, the reduction box body is connected with the box body through a positioning pin and a connecting bolt on one side.

As a further improvement, the worm middle part is worm drive portion, and two sections are bearing connection portion from top to bottom, the bearing connection portion of worm is located respectively deep groove ball bearing with among the tapered roller bearing, expose the upper end of worm the reduction box body is connected the centrifugal governor.

As a further improvement, the gear shaft is pressing close to gear shaft intermediate bearing one side periphery sets up O shape sealing washer, O shape sealing washer periphery sets up the skeleton seal circle.

As a further improvement, no inner circle cylindrical roller bearing one end sets up the retaining ring for the hole, the gear shaft outside sets up sealed lid.

Compared with the prior art, the utility model, have following advantage:

1. the utility model discloses a worm gear speed reducer and external gear drive second grade transmission system, second grade driven external gear compares with the internal gear transmission, can obtain great drive ratio. The outer side of the gear shaft is provided with the cylindrical roller bearing without the inner ring, the bending strength of the cylindrical roller bearing is obviously improved, and larger radial force can be borne.

2. The utility model discloses an one-level speed reduction system adopts the worm gear transmission to regard the gear shaft as output, mesh with the external gear driving-disc of serving as the serving mechanism. The worm gear speed reducer and the rope winding mechanism are designed in a separated mode, so that the processing of parts is simplified, and the assembly and the maintenance of products are facilitated.

3. The utility model discloses according to the unchangeable job features of axial atress direction of worm when the lifting machine rises or descends, two ends of worm have adopted deep groove ball bearing and tapered roller bearing's cooperation, can improve the axial atress of worm, can also guarantee worm gear's centre-to-centre spacing when having wearing and tearing, improve the life of product.

Drawings

Fig. 1 is a schematic side view of the present invention.

Fig. 2 is a front cross-sectional view of the present invention.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings.

Fig. 1-2 include a motor 1, a centrifugal governor 2, a worm gear reducer 3, a reduction box 30, a worm wheel 31, a gear shaft 32, a skeleton seal 33, a worm 34, a tapered roller bearing 35, a seal cover 36, a hole retainer 37, an O-ring 38, a deep groove ball bearing 39, a gear shaft left bearing 310, a gear shaft intermediate bearing 311, a rope winding mechanism 4, an external gear drive disk 41, an inner-ring-free cylindrical roller bearing 42, a hole retainer 43, a seal cover 44, a box 45, a box cover 46, a positioning pin 5, a connecting bolt 6, and the like.

As shown in fig. 1, the utility model relates to a transmission structure of lifting machine, including motor 1, centrifugal overspeed governor 2 is connected to motor 1 output, and worm gear speed reducer machine 3 is connected to centrifugal overspeed governor 2.

The worm gear speed reducer 3 comprises a speed reducer box body 30, the rope winding mechanism 4 comprises a box body 45, and one side of the speed reducer box body 30 is connected with the box body 45 through a positioning pin 5 and a connecting bolt 6. A deep groove ball bearing 39 is rotatably arranged in the reduction box body 30, a tapered roller bearing 35 is rotatably arranged on one side of the deep groove ball bearing 39, a worm 34 is rotatably arranged in the deep groove ball bearing 39 and the tapered roller bearing 35, the middle part of the worm 34 is a worm transmission part, the upper section and the lower section of the worm are bearing connection parts, the bearing connection parts of the worm 34 are respectively positioned in the deep groove ball bearing 39 and the tapered roller bearing 35, and the upper end of the worm 34 is exposed out of the reduction box body 30 and connected with the centrifugal speed limiter 2. A seal cover 36 is provided on the tapered roller bearing 35 side for sealing, and a hole stopper 37 is provided on the seal cover 36 side for preventing the worm 34 from moving. One side of the worm 34 is provided with a gear shaft 32 perpendicular to the worm 34, the periphery of the gear shaft 32 is provided with a worm wheel 31, the worm 34 and the worm wheel 31 are meshed with each other, the periphery of one end of the gear shaft 32 is provided with a gear shaft left bearing 310, the periphery of the middle part of the gear shaft is provided with a gear shaft middle bearing 311, the gear shaft left bearing 310 and the gear shaft middle bearing 311 are both rotatably arranged in the reduction box body 30, the periphery of the gear shaft 32 close to the gear shaft middle bearing 311 is provided with an O-shaped sealing ring 38, the periphery of the O-shaped sealing ring 38 is provided with a. One end of a box body 45 is connected with a box cover 46, an inner-ring-free cylindrical roller bearing 42 is rotatably arranged in the box cover 46, the other end of a gear shaft 32 is installed in the inner-ring-free cylindrical roller bearing 42, an output gear is arranged on the periphery of the other end of the gear shaft 32 and is meshed with an external gear driving disk 41, the external gear driving disk 41 is rotatably arranged in the box body 45, a hole retaining ring 43 is arranged at one end of the inner-ring-free cylindrical roller bearing 42, the hole retaining ring 43 prevents the gear shaft 32 from moving, a sealing cover 44 is arranged on the outer side of the.

The working process of the utility model is as follows:

the power of the motor 1 is transmitted to the worm 34 through the centrifugal governor 2, and the gear shaft 32 drives the external gear driving disk 41 to rotate.

The first-stage transmission system of the transmission structure adopts worm gear transmission, the second-stage transmission system adopts external gear transmission, the first-stage transmission system is designed into an independent part, namely a worm gear speed reducer 3, the output end of the worm gear speed reducer 3 is a gear shaft 32, and the gear shaft is meshed with an external gear driving disc 41 of a rope winding mechanism to form the second-stage transmission system. The rope winding mechanism 4 is also designed as an independent component, and the connecting assembly between the worm gear speed reducer 3 and the rope winding mechanism 4 is positioned by a pin 5 and fastened by a bolt 6. The gear shaft 32 of the worm gear reducer 3 is sealed together by the framework sealing ring 33 and the O-shaped sealing ring 38.

The utility model discloses a no inner circle cylindrical roller bearing 42 dress is in the case lid 46 of serving mechanism 4, and no inner circle cylindrical roller bearing 42's axial positioning is guaranteed to retaining ring 43 for the hole, and sealed lid 44 prevents to scribble the lubricating grease loss on no inner circle cylindrical roller bearing 42. The output end gear of the gear shaft 32 of the worm gear speed reducer 3 is inserted into the rope winding mechanism 4 to be meshed with the external gear driving disc 41 for transmission, and the output end shaft end of the gear shaft 32 is inserted into the cylindrical roller bearing 42 without the inner ring, so that the bending strength of the gear shaft 32 is increased; the cylindrical roller bearing 42 without the inner ring has large radial bearing capacity, and the shaft of the gear shaft 32 is directly inserted into the cylindrical roller bearing 42 without the inner ring, so that the structure is compact, and the bearing capacity of the elevator is improved.

The utility model discloses a worm 34 two end's in the worm gear speed reducer 3 bearing adopts deep groove ball bearing 39 and tapered roller bearing 35's combination respectively, and when the lifting machine rose or descended, tapered roller bearing 35 bore axial and radial force simultaneously, when tapered roller bearing 35 had wearing and tearing, still can guarantee the centre-to-centre spacing between worm 34 and the worm wheel 31, was favorable to prolonging worm gear drive system's life. The seal cover 36 below the worm 34 is blocked by the hole retainer 37, and the pressure increase caused by the temperature rise inside the worm gear reducer 3 can be prevented from being punched out to fail.

Claims

1. The utility model provides a transmission structure of lifting machine which characterized in that: the structure comprises a motor (1), wherein the output end of the motor (1) is connected with a centrifugal speed limiter (2), the centrifugal speed limiter (2) is connected with a worm and gear speed reducer (3), and the worm and gear speed reducer (3) is connected with a rope winding mechanism (4); the primary transmission system of the structure adopts worm and gear transmission, and the secondary transmission system adopts gear transmission;

the worm and gear speed reducer (3) comprises a speed reducer box body (30), the rope winding mechanism (4) comprises a box body (45), a deep groove ball bearing (39) is arranged in the speed reducer box body (30) in a rotating mode, the deep groove ball bearing (39) is arranged on one side of the deep groove ball bearing (39) in a rotating mode and is provided with a worm (34) in the tapered roller bearing (35), a gear shaft (32) is arranged on one side of the worm (34) in a rotating mode, a worm wheel (31) is arranged on the periphery of the gear shaft (32), the worm (34) is meshed with the worm wheel (31), a left gear shaft bearing (310) is arranged on the periphery of one end of the gear shaft (32), a middle gear shaft bearing (311) is arranged on the periphery of the middle of the gear shaft (32), a box cover (46) is connected to one end of the box body (45), and a cylindrical roller, the other end of the gear shaft (32) is installed in the inner-ring-free cylindrical roller bearing (42), an output gear is arranged on the periphery of the other end of the gear shaft (32), and the output gear is meshed with an external gear driving disk (41).

2. The transmission structure of a hoist as claimed in claim 1, characterized in that: one side of the reduction box body (30) is connected with the box body (45) through a positioning pin (5) and a connecting bolt (6).

3. The transmission structure of a hoist as claimed in claim 1, characterized in that: the middle part of the worm (34) is a worm transmission part, the upper section and the lower section of the worm (34) are bearing connection parts, the bearing connection parts of the worm (34) are respectively positioned in the deep groove ball bearing (39) and the tapered roller bearing (35), and the upper end of the worm (34) is exposed out of the reduction box body (30) and connected with the centrifugal speed limiter (2).

4. The transmission structure of a hoist as claimed in claim 1, characterized in that: gear shaft (32) are being pressed close to gear shaft intermediate bearing (311) one side periphery sets up O shape sealing washer (38), O shape sealing washer (38) periphery sets up skeleton seal circle (33).

5. The transmission structure of a hoist as claimed in claim 1, characterized in that: one end of the cylindrical roller bearing (42) without the inner ring is provided with a retainer ring (43) for a hole, and the outer side of the gear shaft 32 is provided with a sealing cover (44).