CN218290066U

CN218290066U - Drum brake for elevator traction machine

Info

Publication number: CN218290066U
Application number: CN202222745684.0U
Authority: CN
Inventors: 陈丽佳; 陈惠良; 王瑜
Original assignee: Changshu Canon Elevator Accessories Co ltd
Current assignee: Changshu Canon Elevator Accessories Co ltd
Priority date: 2022-10-18
Filing date: 2022-10-18
Publication date: 2023-01-13
Anticipated expiration: 2032-10-18

Abstract

A drum brake for an elevator traction machine belongs to the technical field of elevator accessories. Including electromagnet assembly, electromagnet assembly includes that casing and two sets of symmetries set up the braking part in the inner chamber of casing, and braking part includes armature, solenoid, end cover, push rod, and solenoid sets up in the inner chamber of casing, and the end cover is installed in the tip of casing, and solenoid's inside is provided with armature, and the middle part of end cover just corresponds with armature to solenoid's inside protrusion, and armature is connected with the push rod, and the push rod passes the outside that extends to electromagnet assembly behind the end cover, and characteristics are: an insulating part is arranged between the two groups of braking components, the electromagnet assembly further comprises two sets of brake release components which respectively correspond to the two groups of braking components and have the same structure, and the corresponding armature iron moves towards the direction of the end cover by operating the brake release components. The advantages are that: the brake releasing system has the advantages that two independent brake releasing systems are realized, and the problem that the whole brake breaks down when one brake releasing rod is blocked in the prior art is solved.

Description

Drum brake for elevator traction machine

Technical Field

The utility model belongs to the technical field of the elevator accessory, concretely relates to drum brake for elevator hauler.

Background

The elevator traction machine is power equipment of an elevator, and is also called an elevator main machine. The function is to transport and transmit power to run the elevator. It is composed of motor, brake, coupling, speed reducer, traction wheel, machine frame, guide wheel and auxiliary handwheel. The brake is used as a safety component of the elevator and is a basic device for ensuring the safe operation of the elevator, the elevator adopts a mechanical-electrical friction type normally closed brake, and when the elevator does not work, the brake brakes; when the elevator runs, the brake is released. When the elevator is braked, the friction plate and the brake wheel are rubbed by the mechanical force to generate brake torque; when the elevator runs, the brake is released by means of electromagnetic force, which requires that the brake has enough electromagnetic attraction to ensure the normal operation of the elevator.

The brake in the elevator traction machine mainly comprises a drum brake and a disc brake, wherein the drum brake is generally provided with a set of manual brake release device which simultaneously pushes armatures on two sides, if a brake release rod in the brake release device is blocked, the armatures on the two sides cannot return to the original position, the brake cannot hold a brake wheel tightly, and further, the car is moved, and even safety accidents occur.

In view of the above-mentioned prior art, there is a need for a drum brake for a hoist having a reasonable structure. The applicant has made an advantageous design for this purpose, in the context of which the solution to be described below is made.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an elevator is drum brake for hauler realizes independent two sets of braking declutch brake system, whole stopper problem that just breaks down when having avoided a declutch brake lever to take place the card to hinder among the prior art.

The utility model discloses a task is accomplished like this, a drum brake for elevator hauler, including electromagnet assembly, electromagnet assembly include the casing and two sets of symmetry sets up the braking part in the inner chamber of casing, braking part include armature, solenoid, end cover, push rod, solenoid set up in the inner chamber of casing, the end cover install in the tip of casing, solenoid's inside is provided with armature, the middle part of end cover just corresponding with armature to solenoid's inside protrusion, armature be connected with the push rod, the push rod extends to electromagnet assembly's outside after passing the end cover, and characteristics are: an insulating part is arranged between the two groups of braking components, the electromagnet assembly further comprises two sets of brake release components which respectively correspond to the two groups of braking components and have the same structure, and the corresponding armature iron moves towards the direction of the end cover by operating the brake release components.

In a specific embodiment of the present invention, two sets of brake release members are disposed on both radial sides of the housing.

In another specific embodiment of the present invention, the brake component further comprises a spacer located between the insulator and the electromagnetic coil.

In another specific embodiment of the present invention, each set of the brake release members includes a brake release wrench and a brake release plate, the casing and the spacer are provided with brake release wrench holes for communicating with each other, one end of the brake release plate penetrates through the brake release wrench holes and then extends between the insulating member and the armature, the end is a brake release end, the other end of the brake release plate is fixedly connected to the brake release wrench, the end is a connecting end, and the brake release wrench is pulled to rotate the brake release plate.

In another specific embodiment of the present invention, the brake releasing end of the brake releasing plate extending into the housing is processed into a flat shape, when the brake is not released, the flat brake releasing end is vertical, when the brake releasing wrench is pulled to rotate the brake releasing plate, one side of the flat brake releasing end touches the armature, and the other side of the brake releasing end does not touch the insulator.

The utility model discloses a still have a concrete embodiment, electromagnet assembly still include locking device, locking device include ball, elastic component, holding screw, the position processing that the pine flashboard is located the casing has the spacing groove, the ball inlay in the spacing groove, the position that the casing corresponds the spacing groove is seted up threaded hole, holding screw from the outside screw in screw hole of casing, the elastic component inlay in the screw hole and be located between ball and the holding screw.

In yet another specific embodiment of the present invention, a junction box is disposed in each braking part, and the junction box is installed outside the housing to connect the electric wire of the electromagnetic coil with the external electric wire.

The utility model discloses owing to adopted above-mentioned structure, the beneficial effect who has: two sets of brake releasing devices are arranged in the first drum brake and the second drum brake, two armatures are respectively pushed when the brakes are released, two independent brake releasing systems are realized, and the problem that the whole brake breaks down when one brake releasing rod is blocked in the prior art is solved; second, the two sets of brake members are separated by an insulating member so that magnetic fields between the two sets of brake members do not interfere with each other.

Drawings

Fig. 1 is a diagram of a state of use of the drum brake of the present invention.

Figure 2 is a front cross-sectional view of the drum brake's electromagnet assembly of the present invention.

Fig. 3 is a side partial cross-sectional view of an electromagnet assembly of a drum brake according to the present invention.

In the figure: 1. the brake comprises an electromagnet assembly, a shell 11, a shell 111, a threaded hole 12, a brake component 121, an armature 122, an electromagnetic coil 123, an end cover 124, a push rod 125, a spacer bush 126, a junction box 13, an insulating piece 14, a brake release component 141, a brake release wrench 142, a brake release plate 1420, a brake release wrench hole 1421, a brake release end 1422, a connecting end 1423, a limiting groove 15, a locking device 15, a ball 151, a ball 152, an elastic piece 153, a set screw 2, a brake arm 21, a brake shoe 22 and a pin 22; 3. a guide bar; 4. brake spring, 41. Spring baffle; 100. a traction machine; 10. casing, 20, brake wheel.

Detailed Description

The following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings, but the description of the embodiments by the applicant is not intended to limit the technical solutions, and any changes made according to the present invention rather than the essential changes should be considered as the protection scope of the present invention.

In the following description, any concept relating to the directions or orientations of up, down, left, right, front, and rear is based on the position shown in the corresponding drawings, and thus should not be construed as particularly limiting the technical solution provided by the present invention.

Referring to fig. 1, the present invention relates to a drum brake for an elevator traction machine, including an electromagnet assembly 1, a pair of brake arms 2, a pair of guide rods 3, and a pair of brake springs 4, where the elevator traction machine 100 includes a casing 10 and a brake wheel 20. The pair of brake arms 2, the pair of guide rods 3 and the pair of brake springs 4 are symmetrically arranged on two sides of the electromagnet assembly 1 and the brake wheel 20.

As shown in fig. 1, the brake arm 2 is provided with a brake shoe 21, one end of the brake arm 2 is rotatably provided on the housing 10 of the traction machine 100 through a pin 22, and the other end is engaged with the brake spring 4 and the electromagnet assembly 1. The brake shoe 21 corresponds to the brake wheel 20 of the traction machine, and the brake of the brake shoe 21 to the brake wheel 20 can be released by switching on and off the electromagnet assembly 1. The electromagnet assembly 1 and the pair of guide rods 3 are fixed on the machine shell 10, one end of each guide rod 3 is fixed on the machine shell 10, the other end of each guide rod 3 penetrates through the brake arm 2, a spring baffle plate 41 is arranged at the end part of each guide rod 3, the brake arm 2 can move along the guide rods 3, namely when the brake arm 2 moves inwards, the brake shoe 21 on the brake arm 2 tightly holds the brake wheel 20, and the brake of the traction machine is realized; when the brake arm 2 is moved outwards, the brake shoe 21 on the brake arm 2 leaves the brake wheel 20, and the release of the hoisting machine is achieved.

As shown in fig. 1, the brake spring 4 is sleeved on the guide rod 3 and located between the brake arm 2 and the spring baffle 41, that is, one end of the brake spring 4 abuts against the brake arm 2, and the other end abuts against the spring baffle 41, and the brake arm 2 is applied with a spring force by the brake spring 4, so that the two brake arms 2 have a tendency of clasping the brake wheel 20 inwards. When the electromagnet assembly 1 is electrified, the brake arm 2 can move outwards against the spring force of the brake spring 4, so that the brake wheel 20 is released.

As shown in fig. 1 to 3, the electromagnet assembly 1 includes a housing 11, the housing 11 is cylindrical, and has a cylindrical inner cavity inside, two sets of braking components 12 are disposed in the inner cavity of the housing 11, the two sets of braking components 12 are symmetrically disposed, and an insulating member 13 is disposed between the two sets of braking components 12, the two sets of braking components 12 form independent magnetic fields, and when one set of braking components 12 fails, the other set of braking components 12 still has a braking function. Therefore, the insulator 13 is located in the middle of the circular through cavity of the housing 11.

As shown in fig. 2 and 3, each set of brake components 12 includes an armature 121, an electromagnetic coil 122, an end cover 123, a push rod 124, a spacer 125, and a terminal box 126, wherein the spacer 125 and the electromagnetic coil 122 are disposed in the cylindrical inner cavity of the housing 11 and are sequentially arranged along the direction from the insulator 13 to the end of the housing 11. The end cap 123 is mounted to the end of the housing 11, and the electromagnetic coil 122 and spacer 125 also have an internal cavity in which the armature 121 is disposed. The middle portion of the end cap 123 protrudes toward the inside of the electromagnetic coil 122 and corresponds to the armature 121. The armature 121 is connected to a push rod 124, and the push rod 124 extends through an end cap 123 to the outside of the electromagnet assembly 1 and engages with the other end of the brake arm 2 remote from the pin 22. The terminal block 126 is installed outside the housing 11 to connect the electric wire of the solenoid 122 with the external electric wire.

As shown in fig. 2 and 3, the electromagnet assembly 1 further includes two sets of brake release members 14 respectively corresponding to the two sets of brake members 12, and the two sets of brake release members 14 have the same structure and are disposed on two radial sides of the housing 11, and are used for independently opening the corresponding brake members 12 when the electromagnet 1 is in the power-off state, so as to be used in elevator maintenance. Each set of the brake release component 14 comprises a brake release wrench 141 and a brake release plate 142, the housing 11 and the spacer 125 are provided with brake release wrench holes 1420 which are communicated with each other, one end of the brake release plate 142 penetrates through the brake release wrench holes 1420 and then extends between the insulating member 13 and the armature 121, the end is a brake release end 1421, the other end of the brake release plate 142 is fixedly connected with the brake release wrench 141, the end is a connection end 1422, and the brake release plate 142 can be rotated by pulling the brake release wrench 141. Specifically, the brake releasing end 1421 of the brake releasing plate 142 extending into the housing 11 is processed to be flat, when the brake is not released, the flat brake releasing end 1421 is vertically installed, when the brake releasing wrench 141 is pulled to rotate the brake releasing plate 142, one side of the flat brake releasing end 1421 contacts the armature 121, the armature 121 is pushed to move outwards, the push rod is further moved outwards, and meanwhile, the other side of the brake releasing end 1421 does not contact the insulating member 13.

In order to prevent the brake release part 14 from tilting due to gravity and lock the brake release end 1421 in a vertical position when the brake release is not required, a locking device 15 is provided for the brake release part 14, the locking device 15 comprises a ball 151, an elastic member 152 and a set screw 153, a limit groove 1423 is machined in the part of the brake release plate 142 located in the housing 11, and the ball 151 can be embedded in the limit groove 1423. A threaded hole 111 is formed in the housing 11 at a position corresponding to the limiting groove 1423, and the set screw 153 is screwed into the threaded hole 111 from the outside of the housing 11. The elastic member 152 is inserted into the threaded hole 111 and is located between the ball 151 and the set screw 153. The pressure of the elastic member 152 is adjusted by rotating the set screw 153, so that the elastic member 152 presses the ball 151 against the limiting groove 1423, thereby preventing the brake release plate 142 from rotating, and locking the brake release member 14.

With reference to fig. 1 to 3, the drum brake for an elevator traction machine according to the present invention has the following working principle: when the electromagnetic coil 122 in the brake part 12 is energized, an attractive electromagnetic force is formed between the armature 121 and the end cover 123, and the armature 121 moves towards the end cover 123, so that the push rod 124 fixedly connected with the armature 121 pushes the brake arm 2 to move outwards against the spring force of the brake spring 4, and the brake shoe 21 on the brake arm 2 is disengaged from the brake wheel 20, thereby realizing the release of the brake. When the electromagnetic coil 122 in the brake part 12 is powered off, electromagnetic force does not exist between the armature 121 and the end cover 123, the brake spring 4 pushes the brake arm 2 to move inwards, and the brake shoe 21 on the brake arm 2 is pressed against the brake wheel 20, so that the brake is realized. At this time, as the brake arm 2 moves inward, its end pushes the push rod 124 to move inward at the same time, so that a gap is formed between the armature 121 and the end cap 123. When the brake is released manually, the brake release wrench 141 is actuated to rotate the brake release plate 142 against the interference of the balls 151, and the brake release end 1421 of the brake release plate 142 pushes the armature 121 and the push rod 124 to move outward, thereby actuating the brake arm 2 to release the brake wheel 20. Each set of brake release members 14 releases the brake of the corresponding brake arm 2, and when one set of brake release members 14 is blocked, the operation of the other set of brake members 12 is not influenced.

Claims

1. The drum brake for the elevator traction machine comprises an electromagnet assembly (1), wherein the electromagnet assembly (1) comprises a shell (11) and two groups of brake components (12) symmetrically arranged in an inner cavity of the shell (11), each brake component (12) comprises an armature (121), an electromagnetic coil (122), an end cover (123) and a push rod (124), the electromagnetic coil (122) is arranged in the inner cavity of the shell (11), the end cover (123) is arranged at the end part of the shell (11), the armature (121) is arranged inside the electromagnetic coil (122), the middle part of the end cover (123) protrudes towards the inside of the electromagnetic coil (122) and corresponds to the armature (121), the armature (121) is connected with the push rod (124), and the push rod (124) penetrates through the end cover (123) and then extends to the outside of the electromagnet assembly (1), and the drum brake is characterized in that: an insulating part (13) is arranged between the two groups of braking components (12), the electromagnet assembly (1) further comprises two sets of brake release components (14) which respectively correspond to the two groups of braking components (12) and have the same structure, and the corresponding armature (121) moves towards the direction of the end cover (123) by operating the brake release components (14).

2. The drum brake for an elevator traction machine according to claim 1, characterized in that: two sets of brake release components (14) are arranged on two radial sides of the shell (11).

3. The drum brake for an elevator traction machine according to claim 1, characterized in that: the brake component (12) further comprises a spacer (125) located between the insulator (13) and the electromagnetic coil (122).

4. The drum brake for an elevator traction machine according to claim 3, characterized in that: each set of brake release component (14) comprises a brake release wrench (141) and a brake release plate (142), communicated brake release wrench holes (1420) are formed in the shell (11) and the spacer bush (125), one end of the brake release plate (142) penetrates through the brake release wrench holes (1420) and then extends into a position between the insulating part (13) and the armature (121), the end portion is a brake release end (1421), the other end of the brake release plate (142) is fixedly connected with the brake release wrench (141), the end portion is a connecting end (1422), and the brake release wrench (141) is pulled to enable the brake release plate (142) to rotate.

5. The drum brake for an elevator traction machine according to claim 4, characterized in that: the brake releasing end (1421) of the brake releasing plate (142) extending into the shell (11) is processed to be flat, when the brake is not released, the flat brake releasing end (1421) is vertical, when the brake releasing wrench (141) is pulled to enable the brake releasing plate (142) to rotate, one side of the flat brake releasing end (1421) touches the armature (121), and the other side of the brake releasing end (1421) does not touch the insulating part (13).

6. The drum brake for an elevator traction machine according to claim 5, characterized in that: the electromagnet assembly (1) further comprises a locking device (15), the locking device (15) comprises a ball (151), an elastic piece (152) and a set screw (153), a limiting groove (1423) is machined in a position, located on the shell (11), of the loose gate plate (142), the ball (151) is embedded in the limiting groove (1423), a threaded hole (111) is formed in a position, corresponding to the limiting groove (1423), of the shell (11), the set screw (153) is screwed into the threaded hole (111) from the outside of the shell (11), and the elastic piece (152) is embedded in the threaded hole (111) and located between the ball (151) and the set screw (153).

7. The drum brake for an elevator traction machine according to claim 1, characterized in that: a junction box (126) is arranged in each group of brake components (12), and the junction box (126) is arranged outside the shell (11) and enables the electric wire of the electromagnetic coil (122) to be connected with an external electric wire.