CN210655957U

CN210655957U - Electric hoist with low tonnage

Info

Publication number: CN210655957U
Application number: CN201921620408.3U
Authority: CN
Inventors: 朱云国
Original assignee: Zhejiang Kaidao Hoisting Machinery Co ltd
Current assignee: Zhejiang Kaidao Hoisting Machinery Co ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2020-06-02
Anticipated expiration: 2029-09-26

Abstract

The utility model belongs to the technical field of hoisting equipment, a low-tonnage electric block is related to, including gear box, intermediate member and motor, the motor is including setting up stator, rotor and the motor shaft in the motor casing, the cover is equipped with the brake assembly through splined connection on the motor shaft between motor and the intermediate member, the brake assembly establishes at the epaxial brake base of motor including the cover, is provided with the suit in the brake base and installs the brake spring on the motor shaft, is connected with the annular brake disc that the cross-section is the U-shaped on the brake base, the terminal surface of intermediate member be provided with annular brake disc matched with friction locking face. The utility model provides an electric block of low tonnage has reduced electric block's volume by a wide margin, has good braking effect simultaneously.

Description

Electric hoist with low tonnage

Technical Field

The utility model belongs to the technical field of hoisting equipment, a electric block of low tonnage is related to.

Background

The electric hoist is a small-sized hoisting device and consists of a motor, a variable speed transmission mechanism and a chain wheel. The electric chain hoist has the advantages of advanced performance structure, small volume, light weight, reliable performance, convenient operation and the like, is very convenient for hoisting heavy objects, loading and unloading work, equipment maintenance and hoisting goods, and can also be installed on suspended I-steel, curved rails, cantilever crane guide rails and fixed hoisting points for hoisting heavy objects.

The existing electric hoist is not stable in starting, has no braking effect when a motor is stopped, and can still continuously slip away towards the moving direction after stopping working due to inertia, so that the electric hoist cannot be stably stopped. In order to solve the above phenomenon, a brake device and a speed reducer are additionally connected to the motor, which results in large volume and large noise. For the electric hoist with low tonnage, the space proportion occupied by the brake device and the speed reducing device is larger, which is not beneficial to the miniaturization of the electric hoist.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art not enough, provide an electric block of low tonnage, reduced electric block's volume by a wide margin, good braking effect has simultaneously.

In order to solve the above technical problem, the purpose of the present invention can be achieved by the following technical solutions:

the utility model provides an electric block of low-tonnage, includes gear box, intermediate member and motor, the motor is including setting up stator, rotor and the motor shaft in the motor casing, the cover is equipped with the brake assembly through splined connection on the motor shaft between motor and the intermediate member, the brake assembly is established at the epaxial brake base of motor including the cover, is provided with the suit in the brake base and installs the brake spring at the epaxial of motor, is connected with the annular brake disc that the cross-section is the U-shaped on the brake base, the terminal surface of intermediate member be provided with annular brake disc matched with friction locking face.

The outer end face of the annular brake disc is provided with an annular friction plate, and the area of the annular friction plate is smaller than that of the outer end face of the annular brake disc.

The rear end of the motor shell is provided with a rear end cover, and the rear end cover and the motor shell are of an integrated structure and are integrally formed during casting.

The motor shaft is arranged in the rear bearing, the middle bearing and the front bearing in a penetrating mode, and the rear bearing, the middle bearing and the front bearing are all installed in the bearing seat.

Be provided with in the above-mentioned middleware with the epaxial gear engagement's of motor gear wheel, be provided with the clutch disc on the both sides terminal surface of gear wheel, the clutch disc pastes outward and is equipped with dish gasket, gear wheel, clutch disc, dish gasket cover are established on the sprocket shaft, sprocket shaft and clutch disc pass through splined connection and with gear wheel clearance fit.

The chain wheel shaft penetrates through bearings of the gear box and the intermediate piece and is axially positioned through nuts fixed in the gear box.

The chain wheel shaft is provided with a chain wheel for mounting a chain, and a chain conductor is arranged below the chain wheel.

The outer end of the gear box is provided with a gear box bottom cover which is a junction box.

The electric hoist provided by the utility model is particularly suitable for the lifting capacity below 150 kg.

Compared with the prior art, the utility model, following beneficial effect has:

1. the utility model discloses electric block's inner structure has been changed, the inner space that utilizes itself to have between motor and the middleware sets up the brake assembly to electric block's volume has been reduced greatly. Meanwhile, the position of the brake assembly is changed, so that the motor rear end cover and the motor outer barrel can be further integrated, the size is reduced, the working procedures are saved, and the cost is reduced.

2. The utility model discloses increase the separation and reunion structure, when equipment surpassed work load, the structure of separation and reunion produced and skidded, and the motor idles, avoids the work of overload to cause the phenomenon production that the motor burns out and drive gear bites bad.

Drawings

Fig. 1 is a perspective view of the present invention;

FIG. 2 is an internal structural view of the present invention;

fig. 3 is a top view of the present invention;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a cross-sectional view B-B of FIG. 3;

reference numerals: 1. a gear case; 2. a middleware; 3. a motor housing; 4. a rotor; 5. a motor shaft; 6. a brake base; 7. a brake spring; 8. an annular brake disc; 9. an annular friction plate; 10. a rear end cap; 11. a rear bearing; 12. a middle bearing; 13. a front bearing; 14. a bull gear; 15. a clutch plate; 16. a dish-shaped gasket; 17. a sprocket shaft; 18. a nut; 19. a sprocket; 20. a chain conductor; 21. a gear box bottom cover.

Detailed Description

The invention will be further described in the following with reference to specific embodiments thereof, with reference to the accompanying drawings, in which figures 1 to 5:

the utility model provides an electric block of low-tonnage, includes gear box 1, intermediate member 2 and motor, the motor is including setting up stator, rotor 4 and motor shaft 5 in motor casing 3, the cover is equipped with the brake assembly through splined connection on the motor shaft 5 between motor and the intermediate member 2, the brake assembly is established including the cover and is established brake base 6 on motor shaft 5, is provided with the brake spring 7 of suit on motor shaft 5 in the brake base 6, is connected with the annular brake disc 8 that the cross-section is the U-shaped on the brake base 6, the terminal surface of intermediate member 2 is provided with the friction locking face with annular brake disc 8 matched with.

When the motor is electrified to work, the iron core of the rotor 4 rotates to generate magnetic force, the brake assembly is attracted by the magnetic force, the annular brake disc 8 on the brake assembly is separated from the friction stop surface and is not contacted, and the motor works normally; when the motor is powered off, the magnetic force of the iron core of the rotor 4 disappears, the brake assembly rebounds under the action of the brake spring 7, and the annular brake disc 8 and the friction stop surface perform friction braking to realize the rapid braking of the motor.

The outer end face of the annular brake disc 8 is provided with an annular friction plate 9, and the area of the annular friction plate 9 is smaller than that of the outer end face of the annular brake disc 8. The annular friction plate 9 further enhances the effect of the friction brake.

Referring to fig. 1 and 4, a rear end cover 10 is disposed at the rear end of the motor casing 3, and the rear end cover 10 and the motor casing 3 are of an integral structure and are integrally formed during casting.

Referring to fig. 4, a rear bearing 11 is disposed on the inner side of the rear end cover 10, a middle bearing 12 is disposed on the rear end surface of the middle part 2, a front bearing 13 is disposed on the front end surface of the gear box 1, the motor shaft 5 penetrates through the rear bearing 10, the middle bearing 12 and the front bearing 13, and the rear bearing 10, the middle bearing 12 and the front bearing 13 are all mounted in a bearing seat.

Compare fig. 5, be provided with in the above-mentioned intermediate member 2 with the gear engagement's on the motor shaft 5 gear wheel 14, be provided with clutch disc 15 on the both sides terminal surface of gear wheel 14, clutch disc 15 pastes outward and is equipped with dish gasket 16, gear wheel 14, clutch disc 15, dish gasket 16 cover are established on sprocket shaft 17, sprocket shaft 17 passes through splined connection with clutch disc 15 and with 14 clearance fit of gear wheel.

The utility model discloses the theory of operation of separation and reunion is: when the weight of the heavy object does not exceed the rated load capacity, the motor shaft 5 drives the large gear 14 to rotate, the large gear 14 drives the clutch plate 15 to rotate through the friction force between the large gear 14 and the clutch plate 15, the clutch plate 15 drives the chain wheel shaft 17 to rotate, and the chain wheel shaft 17 rotates to drive the heavy object to ascend or descend; when the weight of the heavy object exceeds the rated load, the large gear 14 and the clutch plate 15 rotate relatively against the friction force, and the motor idles, so that the motor is prevented from being burnt due to insufficient power.

The sprocket shaft 17 is inserted into bearings of the gear case 1 and the intermediate member 2, and is axially positioned by a nut 18 fixed in the gear case 1.

The sprocket shaft 17 is provided with a sprocket 19 to which a chain is attached, and a chain conductor 20 is provided below the sprocket 19.

The outer end of the gear box 1 is provided with a gear box bottom cover 21, and the gear box bottom cover 21 is a junction box.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides an electric block of low tonnage, includes gear box (1), intermediate member (2) and motor, the motor is including setting up stator, rotor (4) and motor shaft (5) in motor casing (3), a serial communication port, the cover is equipped with the brake assembly through splined connection on motor shaft (5) between motor and intermediate member (2), brake assembly establishes brake base (6) on motor shaft (5) including the cover, is provided with brake spring (7) of suit on motor shaft (5) in brake base (6), is connected with annular brake disc (8) that the cross-section is the U-shaped on brake base (6), the terminal surface of intermediate member (2) is provided with the friction locking face with annular brake disc (8) matched with.

2. The electric hoist with low tonnage as per claim 1, characterized in that the outer end surface of the annular brake disc (8) is provided with an annular friction plate (9).

3. The electric hoist with low tonnage as recited in claim 1, characterized in that a rear end cover (10) is disposed at the rear end of the motor casing (3), and the rear end cover (10) and the motor casing (3) are of an integral structure.

4. The electric hoist with low tonnage as recited in claim 3, characterized in that the rear bearing (11) is arranged on the inner side of the rear end cover (10), the middle bearing (12) is arranged on the rear end face of the middle part (2), the front bearing (13) is arranged on the front end face of the gear box (1), and the motor shaft (5) is arranged in the rear bearing (11), the middle bearing (12) and the front bearing (13) in a penetrating manner.

5. The electric hoist with low tonnage as recited in claim 1, characterized in that a large gear (14) engaged with a gear on a motor shaft (5) is provided in the intermediate member (2), clutch discs (15) are provided on end faces on both sides of the large gear (14), disc-shaped gaskets (16) are attached to the outside of the clutch discs (15), the large gear (14), the clutch discs (15) and the disc-shaped gaskets (16) are sleeved on a sprocket shaft (17), and the sprocket shaft (17) is connected with the clutch discs (15) through splines and is in clearance fit with the large gear (14).

6. A low tonnage electric hoist according to claim 5, characterized in that the sprocket shaft (17) is inserted in the bearings of the gearbox (1) and the intermediate piece (2) and is axially positioned by means of a nut (18) fixed in the gearbox (1).

7. The electric hoist with low tonnage as per claim 5, characterized in that the chain wheel (19) for mounting the chain is arranged on the chain wheel shaft (17), and the chain conductor (20) is arranged under the chain wheel (19).

8. The electric hoist of low tonnage in accordance with claim 1, characterized in that the outer end of the gearbox (1) is provided with a gearbox bottom cover (21).

9. The low-tonnage electric hoist according to any one of claims 1 to 8, characterized in that the hoisting capacity of the electric hoist is 150kg or less.