Multi-deceleration additional brake structure

Abstract

The invention discloses a multi-deceleration additional brake structure, comprising: a ratchet wheel assembly comprising friction plates and at least two ratchet wheels, the two ratchet wheels being arranged adjacent to each other, the friction plates being located on both sides of the ratchet wheels and clamping the ratchet wheels; teeth of the two ratchet wheels are arranged in a staggered mode in a preset mode, and the two ratchet wheels can rotate relatively. The ratchet wheel assembly is arranged on the main chain wheel driving shaft; the ratchet rod assembly comprises a spring damping action mechanism which is used for making contact with the ratchet wheel and stopping the ratchet wheel, and the ratchet rod assembly is located on the truss. The device is simple in structure and easy to maintain, the deceleration peak value at the action moment of the additional brake is reduced, impact on passengers is reduced, and elevator taking safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and particularly to an additional brake structure with multiple decelerations. Background Art

[0002] As a supplement to a braking device other than the working brake of an escalator, the additional brake effectively brakes the escalator by using the additional brake when the working brake fails or cannot act effectively, ensuring the safety of passengers. When the additional brake acts, the ratchet rod is caught in the ratchet tooth groove under the action of the electromagnet and is stopped under the action of friction. Since the additional brake does not act under normal operating conditions, due to reasons such as rusting over time, it is easy to have a large deceleration at the initial stage of the additional brake action, which causes a large impact on passengers and brings safety risks.

[0003] In the prior art, patent CN113200436B discloses an additional brake adaptive buffer device for an escalator, which can buffer the impact force generated when the pawl first contacts the ratchet to produce a braking effect to a certain extent, but it requires an additional automatic adjustment component to achieve buffering (including mechanisms such as a pressure sensor and an electric screw). Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a device with a simple structure that can effectively reduce the impact brought about at the initial stage of the additional brake action and ensure the safety of passengers.

[0005] To solve the above technical problem, an additional brake structure with multiple decelerations provided by the present invention includes:

[0006] A ratchet assembly, including friction plates and at least two ratchets, each ratchet being arranged adjacent to each other, the friction plates being located on both sides of the ratchets and clamping the ratchets; the teeth of each ratchet are staggered in a preset manner and each ratchet can rotate relative to each other; the ratchet assembly is arranged on the main sprocket drive shaft;

[0007] A ratchet rod assembly for contacting and stopping the ratchet, the ratchet rod assembly being located on the truss.

[0008] Preferably, the head of the ratchet rod can slide along the tail of the ratchet rod.

[0009] Preferably, the preset manner is that

[0010] The ratchet includes a first ratchet and a second ratchet. The first ratchet first contacts the head of the ratchet rod during rotation, and then slides along the friction plate until it reaches the same phase as the second ratchet. At this time, the second ratchet contacts the head of the ratchet rod. At this time, under the action of the head of the ratchet rod, the first ratchet and the second ratchet slide along the friction plate simultaneously.

[0011] Preferably, the ratchet assembly includes three or more ratchets.

[0012] Preferably, the ratchet rod assembly includes a ratchet rod and a damping structure. The ratchet rod includes a ratchet rod head and a ratchet rod tail, and the damping structure is located between the ratchet rod head and the ratchet rod tail.

[0013] Preferably, the damping mechanism can perform damping movement and can automatically reset.

[0014] Preferably, the damping mechanism is a spring or other elastic material.

[0015] Preferably, the material of the friction plate is an organic material, a metal material or a semi-metal material.

[0016] Compared with the prior art, the present invention has the following technical effects:

[0017] By adding multiple ratchets and a ratchet rod spring damping mechanism, the present invention improves the deceleration impact at the initial stage of the additional brake operation, enhances the passenger experience, and reduces the passenger impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

[0019] Figure 1 is a schematic diagram of the additional brake structure with multiple decelerations according to a preferred embodiment of the present invention;

[0020] Figure 2 is Figure 1 the front view of. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following specific embodiments are used to illustrate the implementation manners of the present invention. Those skilled in the art can fully understand other advantages and technical effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific implementation manners, and the details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without departing from the general design concept of the invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. The following exemplary embodiments of the present invention can be implemented in many different forms and should not be construed as being limited only to the specific embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present invention complete and thorough, and to fully convey the technical solutions of these exemplary specific embodiments to those skilled in the art.

[0022] Embodiment 1

[0023] The present invention discloses an additional brake structure with multiple deceleration speeds, which includes a ratchet assembly and a ratchet rod assembly. The ratchet assembly includes friction plates and at least two ratchets. The ratchets are arranged adjacent to each other. The friction plates 3 are located on both sides of the ratchets and clamp the ratchets. The teeth of each ratchet are staggered in a preset manner and the ratchets can rotate relative to each other. The ratchet assembly is arranged on the main sprocket drive shaft. The ratchet rod assembly is used to contact the ratchet and stop the ratchet. The ratchet rod assembly is located on the truss.

[0024] Specifically, the head 4 of the ratchet rod can slide along the tail 6 of the ratchet rod. This can increase the buffer when braking when the head 4 of the ratchet rod contacts the ratchet, and improve the deceleration impact at the initial stage of the operation of the additional brake.

[0025] Preferably, the preset manner of the teeth of the ratchet is that the two ratchets include a first ratchet 1 and a second ratchet 2. The first ratchet 1 contacts the head of the ratchet rod first during rotation, and then slides along the friction plate 3 until it reaches the same phase as the second ratchet 2 (that is, when the teeth of the two ratchets completely coincide), and then the second ratchet 2 contacts the head of the ratchet rod. At this time, under the action of the head of the ratchet rod, the first ratchet and the second ratchet slide along the friction plate at the same time. In this way, buffering can be carried out when the ratchet contacts the ratchet rod, and the impact can be reduced.

[0026] In this embodiment, there are two ratchets, but actually the ratchet assembly can also include three or more ratchets, and each ratchet contacts the ratchet rod in turn, further reducing the impact.

[0027] At the same time, the ratchet rod assembly can include a ratchet rod and a damping structure 5. The ratchet rod includes a head 4 of the ratchet rod and a tail 6 of the ratchet rod. The damping structure 5 is located between the head 4 of the ratchet rod and the tail 6 of the ratchet rod. Setting the damping mechanism 5 can cause displacement between the head 4 of the ratchet rod and the tail 6 of the ratchet rod, further increasing the buffer.

[0028] The damping mechanism 5 can perform damping movement and can automatically reset. Preferably, the damping mechanism can be a spring or other elastic material parts.

[0029] The friction plates 3 can be configured with different materials and areas to flexibly adjust the frictional force. The core materials mainly include three categories: organic materials, metal materials, and semi-metal materials. Organic materials, such as asbestos, carbon black, etc., have stable braking and no noise, but relatively short service life and are vulnerable to high temperatures. Metal materials, like cast iron, steel, etc., have strong durability and stable braking, but are accompanied by relatively large noise and vibration during braking. Semi-metal materials combine the advantages of the former two, with braking effect and service life in the middle, and relatively small noise and vibration.

[0030] The above has described the present invention in detail through specific implementation manners and embodiments, but these do not constitute limitations to the present invention. Without departing from the principle of the present invention, those skilled in the art can also make many deformations and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. A multiple deceleration additional brake structure, characterized in that: include: A ratchet assembly, comprising a friction plate and at least two ratchets, each ratchet is arranged adjacent to the other, the friction plates are located on both sides of the ratchet and clamp the ratchet; the teeth of each ratchet are arranged in a staggered manner in a preset manner and the ratchets can rotate relative to each other; the ratchet assembly is arranged on the main sprocket drive shaft; The ratchet rod assembly is used for contacting with the ratchet wheel and stopping the ratchet wheel, and the ratchet rod assembly is located on the truss.

2. The additional brake structure with multiple decelerations according to claim 1, characterized in that: The head of the ratchet rod can slide along the tail of the ratchet rod.

3. The multiple deceleration additional brake structure according to claim 1, characterized in that: The preset method is: The ratchet includes a first ratchet and a second ratchet. The first ratchet first contacts the ratchet rod head during rotation, and then slides along the friction plate to the same phase as the second ratchet. Then, the second ratchet contacts the ratchet rod head. At this time, under the action of the ratchet rod head, the first ratchet and the second ratchet slide along the friction plate at the same time.

4. The additional brake structure with multiple decelerations according to claim 1, characterized in that: The ratchet assembly includes three or more ratchets.

5. The additional brake structure with multiple decelerations according to claim 1, characterized in that: The ratchet rod assembly comprises a ratchet rod and a damping structure. The ratchet rod comprises a ratchet rod head and a ratchet rod tail. The damping structure is located between the ratchet rod head and the ratchet rod tail.

6. The additional brake structure with multiple decelerations according to claim 5, characterized in that: The damping mechanism can perform damping motion and reset automatically.

7. The additional brake structure with multiple decelerations according to claim 5, characterized in that: The damping mechanism is a spring or other elastic material.

8. The additional brake structure with multiple decelerations according to claim 1, characterized in that: The friction plate is made of organic material, metallic material or semi-metallic material.

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