CN-122014769-A - Braking device and elevator traction machine

CN122014769ACN 122014769 ACN122014769 ACN 122014769ACN-122014769-A

Abstract

The purpose of the present disclosure is to provide a brake device and an elevator hoisting machine, which can inhibit the buffer rubber from generating permanent deformation due to long-term storage. In a storage state, the pair of position adjustment bolts (26) are displaced relative to the movable iron core (22) in a direction away from the pair of buffer rubbers (25). Thereby, at least a part of each buffer rubber (25) is inserted into the corresponding position adjustment screw hole (22 b). At this time, the tip of each position adjustment bolt (26) is separated from the corresponding cushion rubber (25). Therefore, each cushion rubber (25) is not compressed.

Inventors

Gu Jiadian

Assignees

三菱电机楼宇解决方案株式会社

Dates

Publication Date: 20260512
Application Date: 20250226
Priority Date: 20241112

Claims (3)

1. A brake device is provided with: A fixed iron core having a suction surface; a movable iron core that is displaceable in a direction approaching or separating from the suction surface; a brake spring that applies a force to the movable iron core in a direction away from the attraction surface; An electromagnetic coil provided to the fixed core and generating a force for attracting the movable core to the fixed core against the brake spring, and A buffer rubber absorbing an impact generated when the movable iron core collides with the fixed iron core, In the storage, a fixing bolt provided between the fixed iron core and the movable iron core is tightened, thereby maintaining a storage state in which the brake spring is compressed and the movable iron core is in contact with the suction surface, The buffer rubber is provided to a first core which is either one of the fixed core and the movable core, A position adjustment screw hole is provided at a position facing the buffer rubber in a second core that is the other of the fixed core and the movable core, A position adjusting bolt is screwed in the position adjusting threaded hole, When the braking force is released in the use state, the tail end of the position adjusting bolt is abutted with the buffer rubber, In the storage state, the position adjustment bolt is displaced in a direction away from the cushion rubber with respect to the first iron core, whereby at least a part of the cushion rubber is inserted into the position adjustment screw hole.
2. A brake device is provided with: A fixed iron core having a suction surface; a movable iron core that is displaceable in a direction approaching or separating from the suction surface; a brake spring that applies a force to the movable iron core in a direction away from the attraction surface; An electromagnetic coil provided to the fixed core and generating a force for attracting the movable core to the fixed core against the brake spring, and A buffer rubber absorbing an impact generated when the movable iron core collides with the fixed iron core, In the storage, a fixing bolt provided between the fixed iron core and the movable iron core is tightened, thereby maintaining a storage state in which the brake spring is compressed and the movable iron core is in contact with the suction surface, A receiving hole and a fixing screw hole into which the fixing bolt is screwed are provided in a first iron core that is either one of the fixed iron core and the movable iron core, A through hole through which the fixing bolt passes is provided in a second core that is the other of the fixed core and the movable core, A support member is accommodated in the accommodation hole, The cushion rubber is supported by the support member so as to be displaceable together with the support member between a use position between the fixed iron core and the movable iron core and a non-use position not between the fixed iron core and the movable iron core, An auxiliary spring for displacing the buffer rubber from the non-use position to the use position is arranged in the storage hole, In the storage state, the support member is pressed by the fixing bolt, and the cushion rubber is displaced to a non-use position.
3. An elevator traction machine provided with the brake device according to claim 1 or 2.

Description

Braking device and elevator traction machine Technical Field The present disclosure relates to a brake device and an elevator traction machine. Background In a conventional hoisting machine brake of an elevator, a rubber buffer member is fixed to a surface of a magnetic core of an electromagnet, which surface faces a movable core. The buffer member absorbs an impact generated when the movable iron core collides with the electromagnet (for example, refer to patent document 1). Prior art literature Patent literature Patent document 1 Japanese patent laid-open No. 2006-089162 Disclosure of Invention Problems to be solved by the invention In the conventional hoisting machine brake as described above, if the buffer member is compressed for a long period of time, permanent deformation, that is, so-called fatigue, occurs in the buffer member. Therefore, the hoisting machine brake is configured such that the buffer member is not compressed by the movable iron core in a state where braking force is generated when the elevator is at rest. However, in a factory, which is a manufacturing site of the hoisting machine brake, it is difficult to maintain a state in which the movable iron core is separated from the electromagnet because there is no braking object such as a brake drum, and the hoisting machine brake is stored in a state in which the movable iron core is in contact with the electromagnet. Therefore, in the hoisting machine brake stored for a long period of time, the buffer member may be permanently deformed, and the impact generated when the movable iron core collides with the electromagnet may not be sufficiently absorbed. The present disclosure has been made to solve the above-described problems, and an object thereof is to provide a brake device and an elevator hoisting machine that can suppress permanent deformation of a buffer rubber due to long-term storage. Means for solving the problems A brake device according to the present disclosure includes a fixed iron core having a suction surface, a movable iron core capable of being displaced in a direction approaching or separating from the suction surface, a brake spring for applying a force in a direction separating from the suction surface to the movable iron core, an electromagnetic coil provided to the fixed iron core for generating a force for attracting the movable iron core toward the fixed iron core against the brake spring, and a damper rubber for absorbing an impact generated when the movable iron core collides with the fixed iron core, wherein the brake spring is compressed by screwing a fixing bolt provided between the fixed iron core and the movable iron core when the brake spring is stored, a storage state in which the movable iron core is in contact with the suction surface is maintained, the damper rubber is provided to a first iron core which is one of the fixed iron core and the movable iron core, and a position adjustment screw hole is provided at a position opposing the damper rubber in a second iron core which is the other of the fixed iron core and the movable iron core, and the position adjustment screw hole is screwed into the position adjustment screw hole, and when a braking force in a use state is released, the end of the position adjustment screw abuts against the damper rubber, and the position adjustment screw is displaced in a direction away from at least one of the damper screw hole in relation to the second iron core. The braking device according to the present disclosure includes a fixed iron core having a suction surface, a movable iron core capable of being displaced in a direction approaching or separating from the suction surface, a brake spring for applying a force in a direction separating from the suction surface to the movable iron core, an electromagnetic coil provided to the fixed iron core and generating a force for attracting the movable iron core toward the fixed iron core against the brake spring, and a cushion rubber for absorbing an impact generated when the movable iron core collides with the fixed iron core, wherein the brake spring is compressed by screwing a fixing bolt provided between the fixed iron core and the movable iron core, and a storage hole and a through hole through which the fixing bolt is screwed are provided in a first iron core serving as one of the fixed iron core and the movable iron core, and a support member is provided in a storage hole in which the fixing bolt is passed. Effects of the invention According to the present disclosure, the cushion rubber can be prevented from being permanently deformed by long-term storage of the brake device. Drawings Fig. 1 is a schematic configuration diagram showing an elevator apparatus according to embodiment 1. Fig. 2 is a cross-sectional view schematically showing a main part of a brake device provided to the hoisting machine body of fig. 1. Fig. 3 is a sectional view showing a storage state of the brake device of fig. 2. Fig. 4 is a front view