External manual brake releasing device of brake

Abstract

The utility model provides an external manual brake releasing device of brakes, the brakes are symmetrically arranged on two sides of a traction machine body, each brake comprises a brake arm, a pull rod, a brake spring and a spring seat which are arranged on two sides of the traction machine body, and an electromagnet component is arranged on the top of the traction machine body. A brake releasing device is installed between the brake arm and the electromagnet component and comprises two upper arms hinged to the first supporting seat through first hinged shafts and two lower arms hinged to the second supporting seat through second hinged shafts, and the upper arms and the lower arms are hinged through middle hinged shafts. And the upper arm and the lower arm are connected with the hinged ends of the first supporting seat and the second supporting seat through tooth meshing, so that the self-locking performance is good, and the safety is improved. The brake releasing device is simple in structure and low in cost while safe and reliable operation of a brake system is guaranteed, and convenience of elevator maintenance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of brakes, in particular to an external manual brake release device of a brake. Background Art

[0002] The brake is a very important safety component of the elevator. Once it fails, it may cause the car to squat, hit the top, open the door and run, resulting in serious consequences such as shear injuries to personnel. The main types of elevator brakes are drum and disc. Drum brakes are widely used in asynchronous motor traction machines and a considerable number of synchronous motor traction machines due to their simple structure and low cost. Most freight elevators and a considerable number of passenger elevators use this type of brake.

[0003] After searching, a release mechanism of a drum brake with an existing announcement number CN208631997U includes a release mechanism for manually releasing the brake, and the release mechanism includes a pulling component and a rotating component, and the pulling component and the rotating component are hinged together by a hinge rod and can rotate relative to each other; when releasing the brake, one end of the pulling component is fixed to the brake arm, and one end of the rotating component is fixed to an end of the pull rod away from the traction machine body, and by pulling the rotating component, the rotation of the rotating component drives the pulling component, and then the pulling component pulls the brake arm, so that it rotates around the corresponding fixed pin to achieve release.

[0004] The brake release mechanism of the drum brake has the following shortcomings in actual use: when applying force to turn the rotating part, it may take a lot of effort to operate, and the rotating part may break after long-term use. In addition, since the brake release mechanism structure is too long, it is not easy to carry. In this case, a brake release device installed on the outside of the brake is designed. Utility Model Content

[0005] The utility model aims to provide an external manual brake release device for a brake to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The brake is symmetrically mounted on both sides of a traction machine body, and comprises brake arms, pull rods, brake springs and spring seats mounted on both sides of the traction machine body, the brake arms are pivotally mounted on the upper side through fixed pins, the pull rods are connected to the upper side after passing through the brake arms, the brake springs are sleeved on the pull rods, one end of the brake springs is in contact with the spring seat arranged at the end of the pull rods, and the other end is in contact with the brake arms, a locking nut is arranged on the pull rods outside the spring seats, an electromagnet component is arranged on the top of the traction machine body, a brake release device is installed between the brake arms and the electromagnet component, the brake release device comprises two upper arms hinged on a first support seat through a first hinge shaft and two lower arms hinged on a second support seat through a second hinge shaft, the upper arms and the lower arms are hinged through an intermediate hinge shaft, hinge holes are arranged at the hinged ends of the lower arms and the upper arms, and the hinge holes are through holes closed by the top hole walls.

[0008] Preferably, threaded holes are provided at middle positions of the first support seat and the second support seat, and bolts are passed through the threaded holes to connect and fix the first support seat to the brake arm and the second support seat to the electromagnet component.

[0009] Preferably, the upper arm is located at one end of the first support seat and is an end plate portion provided with teeth, and the two upper arms are meshedly connected by the teeth on their end plates; the lower arm is located at one end of the second support seat and is a tail plate portion provided with teeth, and the two lower arms are meshedly connected by the teeth on their tail plates.

[0010] Preferably, a lead screw is installed between the two intermediate hinge shafts.

[0011] Compared with the prior art, the technical effects and advantages of the utility model are:

[0012] When releasing the brake, the brake releasing device is installed between the brake arm and the electromagnet component. By continuously rotating the lead screw to gradually straighten the upper arm and the lower arm, the brake arm is slowly and steadily pushed away from the traction machine body, so that the friction plate on the brake arm leaves the surface of the brake wheel to achieve brake release.

[0013] There is no opening in the hinge holes at the hinge ends of the lower arm and the upper arm, and the brake release device will not produce the phenomenon of the intermediate hinge shaft falling off from the hinge end due to deformation of the hinge holes during use, thereby improving safety and stability; the upper arm and the lower arm are respectively connected to the first support seat and the second support seat at the hinge ends by tooth meshing, with good self-locking performance and improved safety.

[0014] While ensuring the safe and reliable operation of the braking system, a brake release device with a simple structure is provided, which is low in cost and improves the convenience of elevator maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic cross-sectional view of the overall structure of the utility model;

[0016] Figure 2 It is a three-dimensional schematic diagram of the brake release device of the utility model;

[0017] Figure 3 This is a cross-sectional schematic diagram of the brake release device of the utility model when in use;

[0018] Figure 4 For this utility model Figure 2 Schematic top view of .

[0019] In the figure: 1 brake arm, 2 pull rod, 3 brake spring, 4 spring seat, 5 fixing pin, 6 electromagnet component, 7 brake release device, 8 first hinge shaft, 9 first support seat, 10 upper arm, 11 second hinge shaft, 12 second support seat, 13 lower arm, 14 middle hinge shaft, 15 screw rod, 16 threaded hole, 17 locking nut, 18 traction machine body. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example:

[0022] See also Figures 1 to 4 , the utility model provides a technical solution:

[0023] A brake external manual release device, wherein the brake is symmetrically mounted on both sides of a traction machine body 18, and comprises a brake arm 1, a pull rod 2, a brake spring 3, and a spring seat 4 mounted on both sides of the traction machine body 18, wherein the brake arm 1 is pivoted on the upper side through a fixing pin 5, and the pull rod 2 is connected to the traction machine body 18 after passing through the brake arm 1, and the brake spring 3 is sleeved on the pull rod 2, and one end of the brake spring 3 is in conflict with the spring seat 4 disposed at the end of the pull rod 2, and the other end is in conflict with the brake arm 1, and the outer side of the spring seat 4 is provided. A locking nut 17 is provided on the pull rod 2, an electromagnet component 6 is provided on the top of the 18, and a release device 7 is installed between the brake arm 1 and the electromagnet component 6. The release device 7 includes two upper arms 10 hinged on the first support seat 9 through a first hinge shaft 8 and two lower arms 13 hinged on the second support seat 12 through a second hinge shaft 11. The upper arm 10 and the lower arm 13 are hinged through an intermediate hinge shaft 14. The hinged end of the lower arm 13 and the upper arm 10 is provided with a hinge hole, and the hinge hole is a through hole with a closed top hole wall.

[0024] Furthermore, threaded holes 16 are provided in the middle of the first support seat 9 and the second support seat 12 , and bolts are passed through the threaded holes 16 to connect and fix the first support seat 9 to the brake arm 1 and the second support seat 12 to the electromagnet component 6 .

[0025] With the above structure, when releasing the brake, the brake releasing device 7 is installed between the brake arm 1 and the electromagnet component 6. By continuously rotating the screw rod 15, the upper arm 10 and the lower arm 13 are gradually straightened, and the brake arm 1 is slowly and steadily pushed away from the traction machine body 18, so that the friction plate on the brake arm 1 leaves the surface of the brake wheel, thereby achieving brake release.

[0026] Furthermore, the upper arm 10 is located at one end of the first support seat 9 and is an end plate portion with teeth, and the two upper arms 10 are meshed connected by the teeth on their end plates; the lower arm 13 is located at one end of the second support seat 12 and is a tail plate portion with teeth, and the two lower arms are meshed connected by the teeth on their tail plates.

[0027] By means of the above structure, the upper arm 10 has no opening in the hinge hole at the hinge end with the lower arm 13, and the brake release device 7 will not produce the phenomenon that the intermediate hinge shaft 14 falls off from the hinge end due to deformation of the hinge hole during use, thereby improving safety and stability; the upper arm 10 and the lower arm 13 are respectively connected to the first support seat 9 and the second support seat 12 at the hinge ends by tooth meshing, with good self-locking performance and improved safety.

[0028] Furthermore, a lead screw 15 is installed between the two intermediate hinge shafts 14 .

[0029] By means of the above structure, the upper arm 10 and the lower arm 13 are gradually straightened by continuously rotating the screw rod 15 , and the brake arm 1 is slowly and steadily pushed away from the traction machine body 18 .

[0030] The remaining undescribed parts of the present invention may be the same as the prior art, or are well-known technologies, or may be implemented by using the prior art, and will not be described in detail herein.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An external manual brake release device, characterized in that: The invention comprises a brake arm (1), a pull rod (2), a brake spring (3) and a spring seat (4) installed on both sides of a traction machine body (18); the brake arm (1) is pivoted on the traction machine body through a fixing pin (5); the pull rod (2) is connected to the traction machine body (18) after passing through the brake arm (1); the brake spring (3) is sleeved on the pull rod (2); one end of the brake spring (3) is in contact with the spring seat (4) arranged at the end of the pull rod (2); and the other end is in contact with the brake arm (1); a locking nut (17) is arranged on the pull rod (2) outside the spring seat (4); an electromagnet component (6) is arranged on the top of the traction machine body (18); and a release device (7) is installed between the brake arm (1) and the electromagnet component (6).

2. The external manual brake release device of claim 1, characterized in that: The brake release device (7) comprises two upper arms (10) hinged on a first support seat (9) via a first hinge shaft (8) and two lower arms (13) hinged on a second support seat (12) via a second hinge shaft (11); the upper arms (10) and the lower arms (13) are hinged via an intermediate hinge shaft (14); hinge holes are provided at the hinged ends of the lower arms (13) and the upper arms (10); the hinge holes are through holes with closed top hole walls.

3. The external manual brake release device of claim 2, characterized in that: A threaded hole (16) is provided in the middle of the first support seat (9) and the second support seat (12), and bolts are passed through the threaded holes (16) to connect and fix the first support seat (9) to the brake arm (1) and to connect and fix the second support seat (12) to the electromagnet component (6).

4. The external manual brake release device of claim 2, characterized in that: The upper arm (10) is located at one end of the first support seat (9) and is an end plate portion provided with teeth, and the two upper arms (10) are meshedly connected via the teeth on the end plates; the lower arm (13) is located at one end of the second support seat (12) and is a tail plate portion provided with teeth, and the two lower arms (13) are meshedly connected via the teeth on the tail plates.

5. The external manual brake release device of claim 3, characterized in that: A lead screw (15) is installed between the two intermediate hinge shafts (14).

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