CN210065002U

CN210065002U - Manual lifting device of electric hoist

Info

Publication number: CN210065002U
Application number: CN201920846173.3U
Authority: CN
Inventors: 朱道淑; 陶敏锋
Original assignee: Kai Cheng Elevator Machinery Co Ltd
Current assignee: Kai Cheng Elevator Machinery Co Ltd
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2020-02-14
Anticipated expiration: 2029-06-05

Abstract

The utility model provides a manual lifting device of an electric hoist, which comprises a lifting motor, a shaft coupling, a speed reducer and a release nut; the coupler can be meshed with a rotating shaft of a lifting motor and an output shaft of a speed reducer; the input shaft of the speed reducer is provided with a hand-cranking device; a brake seat is arranged on the rear end cover of the lifting motor, the brake seat is fixedly connected with the shell of the speed reducer through a connecting frame, and a brake disc and a release nut are sequentially arranged in the brake seat from front to back along the rotating shaft direction of the lifting motor; the release nut comprises a nut body and a locking bolt, the nut body is in threaded connection with a threaded hole in the brake seat, an adjusting gap is reserved between the rear end of the nut body and the rear end face of the brake seat, and the front end face of the nut body can push the brake disc open; the locking bolt is installed on the rear end face of nut body, and the afterbody of locking bolt can stretch into in the adjustment clearance and support the rear end face of brake seat. The utility model discloses can solve when having a power failure or voltage unstability, the unable normal operating's of electric block problem.

Description

Manual lifting device of electric hoist

Technical Field

The utility model belongs to the technical field of electric block, concretely relates to electric block manual hoisting device.

Background

The electric hoist generally uses electric power as a hoisting tool for lifting heavy objects, but in some occasions, abnormal conditions such as power failure or unstable voltage are often encountered, and at the moment, in order to ensure the normal operation of the electric hoist, a manual lifting device of the electric hoist needs to be designed to provide emergency and auxiliary lifting functions for the electric hoist so as to lift and lower heavy objects under the above conditions, and meanwhile, the manual lifting device cannot influence the normal use of the electric hoist in an electric driving scene.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a manual hoisting device of electric block to when solving power failure or voltage unstability, the unable normal operating's of electric block problem.

The utility model provides a following technical scheme:

a manual lifting device of an electric hoist comprises a lifting motor, a coupling, a speed reducer and a release nut; the coupler is arranged on an output shaft of the speed reducer and can be meshed with a rotating shaft of the lifting motor and the output shaft of the speed reducer; the input shaft of the speed reducer is provided with a hand-cranking device; a brake seat is mounted on a rear end cover of the lifting motor, the brake seat is fixedly connected with a shell of the speed reducer through a connecting frame, and a brake disc and the release nut are sequentially mounted in the brake seat from front to back along the direction of a rotating shaft of the lifting motor; the release nut comprises a nut body and a locking bolt, the outer thread wall of the nut body is in threaded connection with the threaded hole in the brake seat, an adjusting gap is reserved between the rear end of the nut body and the rear end face of the brake seat, and the front end face of the nut body can prop open the brake disc; the locking bolt is arranged on the rear end face of the nut body, and the tail portion of the locking bolt can extend into the adjusting gap to abut against the rear end face of the brake seat.

Preferably, the rear end face of the nut body is further provided with a rotating handle vertically extending out of the rear end face of the nut body.

Preferably, a bearing groove with an opening facing the front is formed in the front end face of the nut body, a rolling bearing is mounted in the bearing groove, a friction ring coaxial with the rolling bearing is fixed on the brake disc, and the rolling bearing abuts against the friction ring.

Preferably, a retainer ring is mounted on the nut body at the front side of the rolling bearing, and the retainer ring protrudes out of the nut body.

Preferably, a fan housing is mounted on the brake seat, and covers the brake seat and the release nut.

Preferably, hand cranking device includes hand wheel, axle sleeve, baffle and handle, the axle sleeve install in on the input shaft of reduction gear, the hand wheel weld in on the axle sleeve, the baffle is followed the rear end of axle sleeve is sealed the axle sleeve, handle vertically fixed mounting in on the hand wheel.

Preferably, a plurality of triangular rib plates are uniformly and radially welded at the front end of the shaft sleeve, and one right-angle side of each triangular rib plate is welded on the hand wheel.

The utility model has the advantages that: the utility model discloses the brake disc is backed up to the installation depth who twists the release nut in the brake block to the utilization, plays to rise motor and reduction gear through the coupling joint, recycles the hand cranking device on the reduction gear and makes to play to rise the motor and accomplish the action of going up and down, has realized the manual lift to playing to rise the motor when electric power is unusual. The external reduction gear that increases of motor that rises mainly has two functions: firstly, the total speed ratio is increased, and manual driving operation is facilitated; and secondly, a self-locking function is provided, and the phenomenon that the heavy object falls down at the moment of pause when the heavy object is manually lifted is prevented. The utility model discloses an installation locking bolt in the release nut avoids not hard up and causes the malfunction to the brake disc when playing to rise the normal during operation of motor release nut, has improved work security and stability. The brake seat is fixedly connected with the shell of the speed reducer through the connecting frame, so that the output shaft of the speed reducer is always in the same straight line with the rotating shaft of the lifting motor, and the coupling is conveniently and accurately connected with the lifting motor and the speed reducer.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of the internal structure of the present invention;

fig. 2 is a schematic structural view of the release nut of the present invention;

FIG. 3 is a schematic diagram of the right side view of the structure of FIG. 1;

labeled as: 1. a hoisting motor; 11. a rear end cap; 12. a rotating shaft; 2. a coupling; 3. a speed reducer; 4. releasing the nut; 41. a nut body; 42. locking the bolt; 43. adjusting the clearance; 44. rotating the handle; 45. a rolling bearing; 46. a retainer ring; 5. a fan housing; 6. a hand cranking device; 61. a hand wheel; 62. a shaft sleeve; 63. a baffle plate; 64. a handle; 65. a triangular rib plate; 7. a brake base; 71. a brake disc; 72. a friction ring; 8. and a connecting frame.

Detailed Description

As shown in fig. 1 to 3, a manual lifting device for an electric hoist comprises a lifting motor 1 for the electric hoist, a coupling 2, a speed reducer 3, a release nut 4, a fan housing 5 and a hand cranking device 6. The coupling 2 is arranged on an output shaft of the speed reducer 3, and the coupling 2 can be meshed and connected with a rotating shaft 12 of the lifting motor 1 and the output shaft of the speed reducer 3 by pushing. The input shaft of the speed reducer 3 is provided with a hand-operated device 6, and the rotating shaft 12 of the lifting motor 1 can be indirectly rotated by shaking the hand-operated device 6, so that the electric hoist can be manually released or lifted; the external speed reducer 3 of the hoisting motor 1 is added, and the two functions are mainly realized: firstly, the total speed ratio is increased, and manual driving operation is facilitated; and secondly, a self-locking function is provided, and the phenomenon that the heavy object falls down at the moment of pause when the heavy object is manually lifted is prevented. The rear end cover 11 of the hoisting motor 1 is provided with a brake seat 7 through bolts, and the brake seat 7 is fixedly connected with the shell of the speed reducer 3 through four connecting frames 8, so that the speed reducer 3 and the hoisting motor 1 form an integral piece. The brake disc 71 and the release nut 4 are sequentially installed in the brake base 7 from front to back along the rotating shaft direction of the hoisting motor 1, the release nut 4 comprises a nut body 41 and a locking bolt 42, the outer thread wall of the nut body 41 is in threaded connection with a threaded hole in the brake base 7, an adjusting gap 43 is reserved between the rear end of the nut body 41 and the rear end face of the brake base 7, the nut body 41 is continuously screwed into the brake base 7, the brake disc 71 can be pushed open by the front end face of the nut body 41, and therefore the rotating shaft of the hoisting motor 1 is released. The locking bolt 42 is installed on the rear end face of the nut body 41, the tail portion of the locking bolt 42 can extend into the adjusting gap 43 and abut against the rear end face of the brake base 7 to prevent the nut body 41 from freely rotating, and when the lifting motor 1 needs to be released, the locking bolt 42 is screwed out of the nut body 41 for a certain distance or taken out. The rear end surface of the nut body 41 is also provided with a rotating handle 44 vertically extending out of the rear end surface of the nut body, and the nut body 41 can be easily and effortlessly screwed by pushing the rotating handle 44.

As shown in fig. 1, a bearing groove with a forward opening is formed in the front end face of the nut body 41, the rolling bearing 45 is installed in the bearing groove, a friction ring 72 coaxial with the rolling bearing 45 is fixed on the brake disc 71, the rolling bearing 45 abuts against the friction ring 72, when the nut body 41 is continuously screwed, the rolling bearing 45 always pushes against the side wall of the friction ring 72 forward, so that the brake disc 71 is pushed open, friction between the nut body 41 and the brake disc 71 is avoided, and the service life of the brake disc 71 is prolonged. The retainer ring 46 is mounted on the front side of the rolling bearing 45 on the nut body 41, the retainer ring 46 is made of steel wire, and the retainer ring 46 protrudes out of the nut body 41 and can limit the nut body 41 from loosening in the rear direction.

The brake seat 7 is provided with the fan cover 5 through the bolt, and when the electric hoist does not need to be lifted manually, the brake seat 7 and the release nut 4 are covered by the fan cover 5, so that the parts in the fan cover are protected from being damaged due to the influence of the environment.

As shown in fig. 3, the hand cranking device 6 includes a hand wheel 61, a sleeve 62, a baffle 63, a handle 64 and a triangular rib plate 65, the sleeve 62 is fixedly mounted on the input shaft of the reducer 3, the baffle 63 closes the sleeve 62 from the rear end of the sleeve 62, the hand wheel 61 is welded on the sleeve 62, the handle 64 is vertically fixedly mounted on the hand wheel 61, and the input shaft of the reducer 3 can be easily rotated by rocking the handle 64. The front end of the shaft sleeve 62 is uniformly and radially welded with a plurality of triangular rib plates 65, one right-angle side of each triangular rib plate 65 is welded on the hand wheel 61, and the triangular rib plates 65 increase the connection strength between the hand wheel 61 and the shaft sleeve 62 and prevent the hand wheel 61 from loosening.

The using method of the device comprises the following steps: under the condition that a power supply is normal, the fan cover 5 is installed, the coupling 2 is separated from the rotating shaft 12 of the lifting motor 1, and electric power is used as power for lifting heavy objects; when the power supply is abnormal, the power supply is required to be switched to a manual lifting mode, the power supply switch is firstly switched off, the fan cover 5 is detached, the coupling 2 is meshed with the rotating shaft 12 of the lifting motor 1, the locking bolt 42 is loosened, the nut body 41 is rotated by rotating the handle 44 and is continuously screwed into the brake base 7 forwards until the front end face of the nut body 41 jacks the brake disc 71 of the lifting motor, so that the rotating shaft 12 of the lifting motor is loosened, then the handle 64 of the hand-operated device 6 is shaken, and the lifting motor 1 is manually lifted through the speed reducer 3.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The manual lifting device of the electric hoist is characterized by comprising a lifting motor, a coupling, a speed reducer and a release nut; the coupler is arranged on an output shaft of the speed reducer and can be meshed with a rotating shaft of the lifting motor and the output shaft of the speed reducer; the input shaft of the speed reducer is provided with a hand-cranking device; a brake seat is mounted on a rear end cover of the lifting motor, the brake seat is fixedly connected with a shell of the speed reducer through a connecting frame, and a brake disc and the release nut are sequentially mounted in the brake seat from front to back along the direction of a rotating shaft of the lifting motor; the release nut comprises a nut body and a locking bolt, the outer thread wall of the nut body is in threaded connection with the threaded hole in the brake seat, an adjusting gap is reserved between the rear end of the nut body and the rear end face of the brake seat, and the front end face of the nut body can prop open the brake disc; the locking bolt is arranged on the rear end face of the nut body, and the tail portion of the locking bolt can extend into the adjusting gap to abut against the rear end face of the brake seat.

2. The manual lifting device of the electric hoist as claimed in claim 1, wherein a rotating handle vertically protruding from the rear end surface of the nut body is further installed on the rear end surface of the nut body.

3. The manual lifting device of the electric hoist as claimed in claim 2, wherein the nut body has a bearing groove opened forward on a front end surface thereof, the bearing groove is provided with a rolling bearing therein, a friction ring coaxial with the rolling bearing is fixed to the brake disc, and the rolling bearing abuts against the friction ring.

4. The manual lifting device of the electric hoist as claimed in claim 3, wherein a retainer ring is mounted on the nut body at the front side of the rolling bearing, and the retainer ring protrudes from the nut body.

5. The manual lifting device of an electric hoist according to any one of claims 1 to 4, characterized in that a wind shield is mounted on the brake base, and the wind shield covers the brake base and the release nut.

6. The manual lifting device of electric block of claim 2, characterized in that, the hand cranking device includes hand wheel, axle sleeve, baffle and handle, the axle sleeve install in on the input shaft of reduction gear, the baffle seals the axle sleeve from the rear end of axle sleeve, the hand wheel welds in on the axle sleeve, the handle vertically fixed mounting in on the hand wheel.

7. The manual lifting device of the electric hoist according to claim 6, wherein a plurality of triangular rib plates are uniformly and radially welded to the front end of the shaft sleeve, and one right-angle side of each triangular rib plate is welded to the hand wheel.