CN213231092U

CN213231092U - Elevator buffer device made of non-metal composite material

Info

Publication number: CN213231092U
Application number: CN202021790776.5U
Authority: CN
Inventors: 刘仕国; 郝贵坡
Original assignee: Shanghai Chunxin Electromechanical Technology Co ltd
Current assignee: Shanghai Chunxin Electromechanical Technology Co ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2021-05-18
Anticipated expiration: 2030-08-24

Abstract

The utility model relates to an elevator buffer that non-metallic composite made, along the direction of keeping away from elevator car, it includes buffering component, piston, pneumatic cylinder and installation base in proper order, still is provided with the gag lever post in the installation base, and the other end extension of gag lever post extends the through-hole of piston bottom, and this piston is connected with pneumatic cylinder sliding fit, and wherein the piston cover is established in the pneumatic cylinder periphery, and the pneumatic cylinder top passes pneumatic cylinder top through-hole wherein including being suitable for the piston wall. The elevator buffer described herein is more evenly stressed, simple in construction, lighter in weight, and easy to install and maintain. The elevator buffer device increases the cross section area of the plunger, and effectively reduces the requirement of the rigidity of the plunger on the mechanical properties of materials. And the molding process difficulty is greatly reduced due to the self taper.

Description

Elevator buffer device made of non-metal composite material

Technical Field

The utility model relates to an elevator safety technical field, concretely relates to elevator buffer that non-metallic composite made.

Background

An elevator system includes an enclosed car for vertically transporting passengers and/or cargo in a hoistway. The car typically includes four side walls, a ceiling and a floor or platform. For structural support and vertical movement, the car is typically supported by a frame or frame that directly engages a drive device (e.g., wired, linear motor, hydraulic, etc.). The elevator system may also include an elevator buffer disposed at a floor or bottom of a hoistway of the elevator system, the elevator buffer designed to provide safety measures and/or to minimize damage to the elevator system and/or passenger discomfort during an abnormal event. More specifically, the primary function of an elevator buffer is to buffer the elevator car or counterweight as it falls.

Conventional elevator buffering devices can be generally classified into energy-consuming buffering devices and energy-storing buffering devices. The energy-consuming type buffer device can absorb collision energy when receiving car impact or opposite impact, cannot restore to the original position by self, but can restore to the original position by virtue of a spring or self elasticity. The energy storage type buffer device can absorb impact energy and can be restored to an original state after the impact energy is released. However, whether the energy dissipation type buffer device and the energy storage type buffer device are used singly or in combination, the elevator buffer device has the problem of uneven stress to a greater or lesser extent.

The Chinese patent application with the application number of 201610438202.3 discloses an elevator buffer, which comprises a collided head and a body, and is characterized in that the body is movably connected with the collided head through an axis, the upper part of the collided head is tightly attached and fixed with a buffer head, the shell of the buffer head adopts a plastic shell, and an air bag is arranged in the buffer head and can be inflated and popped up after being collided; the bottom end of the body is fixed on the contact ground, the body is also fixed on the contact ground through a support, one end of the support is welded on the middle-lower section of the body, and the other end of the support is fixed on the contact ground through a fixing piece; the buffer adopts a hydraulic buffer. The elevator buffer disclosed in this patent document provides a more uniform force to the elevator buffer by providing an airbag.

Chinese patent application No. 201580082544.X discloses an elevator system comprising: a buffer; a frame; a platform spaced apart from the frame; and a pre-compressed pad device disposed between the frame and the platform and engaged with one of the frame and the platform and spaced apart from the other of the frame and the platform. The elevator buffer disclosed in this patent document provides more uniform force application to the elevator buffer by providing a frame and a pre-compressed substrate.

For this reason, there is a continuing need in the art to develop an elevator buffer that is more uniformly stressed.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the present application aims to provide an elevator buffer made of a non-metal composite material, so as to solve the technical problems in the prior art. Specifically, the elevator buffer device described herein comprises, in order from top to bottom, a buffer element, a piston, a hydraulic cylinder, and a mounting base, and by setting the radial dimension of the cross section of the piston to be greater than the radial dimension of the cross section of the hydraulic cylinder, the buffer is stressed more uniformly. In addition, most parts in the elevator buffer device can be made of non-metal composite materials, so that the elevator buffer device is lighter in whole, simpler in structure and easy to install and maintain.

In order to solve the above technical problem, the present application provides the following technical solutions.

In a first aspect, the present application provides an elevator buffer made of a non-metallic composite material, characterized in that, along a direction away from an elevator car, the elevator buffer comprises in sequence:

a buffer element;

a piston including a piston crown, a first piston outer surface, a first piston inner surface, a first tubular piston wall extending downwardly from the piston crown along a piston axial direction a first length and extending a predetermined thickness between the first piston outer surface and the first piston inner surface, a second piston inner surface, and a second tubular piston wall extending downwardly from the piston crown along a piston axial direction a second length and extending a predetermined thickness between the second piston outer surface and the second piston inner surface, the first length being greater than the second length, the first tubular piston wall being located peripherally to the second tubular piston wall, an annular gap being present between the first tubular piston wall and the second tubular piston wall, the annular gap including a resilient member disposed around the second tubular piston wall, the inner surface of the second piston forms a hollow piston cavity, the top of the piston cavity comprises a piston top through hole, and the bottom of the piston cavity comprises a piston bottom through hole;

a hydraulic cylinder including a cylinder top, a cylinder bottom, a cylinder outer surface, a cylinder inner surface, a tubular cylinder wall, and a cylinder cavity, the tubular cylinder wall extending upwardly a third length from the cylinder bottom in a cylinder axial direction and a predetermined thickness between the cylinder outer surface and the cylinder inner surface, the cylinder bottom further including a cylinder boss extending upwardly a fourth length from the cylinder bottom in the cylinder axial direction and a predetermined thickness outwardly in a radial direction from the cylinder outer surface;

the mounting base is used for sealing the bottom of the hydraulic cylinder and forms a hydraulic cylinder cavity together with the tubular hydraulic cylinder wall;

the bottom of the limiting rod is arranged in the mounting base, and the top of the limiting rod extends through the through hole at the bottom of the piston;

wherein the damping element is disposed above the piston;

the piston is connected with the hydraulic cylinder in a sliding fit mode, the first tubular piston wall is sleeved on the periphery of the tubular hydraulic cylinder wall, the inner surface of the first piston directly contacts the outer surface of the hydraulic cylinder, and the top of the hydraulic cylinder comprises a hydraulic cylinder top through hole through which the second tubular piston wall penetrates.

In one embodiment of the first aspect, the center of the cushioning element comprises a cushioning element through-hole having a radial dimension smaller than a radial dimension of the piston element top through-hole.

In one embodiment of the first aspect, the resilient member is a metal compression spring or a pneumatic compression spring.

In one embodiment of the first aspect, the second piston wall bottom has a tapered portion whose radial dimension gradually decreases downward in the piston axial direction.

In one embodiment of the first aspect, the cylinder head has a tapered opening with a radial dimension increasing gradually upwards in the axial direction of the cylinder, and the smallest radial dimension of the tapered opening is larger than the largest radial dimension of the tapered portion of the second piston wall bottom.

In one embodiment of the first aspect, the top of the stopper rod includes a stopper rod raised portion having a radial dimension greater than a radial dimension of the piston bottom through hole.

In an embodiment of the first aspect, the cylinder outer surface comprises an annular groove closer to the cylinder top for receiving a seal.

In one embodiment of the first aspect, the bottom of the hydraulic cylinder is sealed by the mounting base.

In one embodiment of the first aspect, the thickness of the first piston wall is equal to the thickness of the cylinder boss portion extending outward from the cylinder outer surface in a radial direction of the cylinder outer surface.

In one embodiment of the first aspect, the hydraulic cylinder is configured to store hydraulic transmission medium, the hydraulic transmission medium comprising an oil-based hydraulic transmission medium and a water-based hydraulic transmission medium.

Compared with the prior art, the beneficial effects of the utility model reside in that: the elevator buffer described herein is more evenly stressed, simple in construction, lighter in weight, and easy to install and maintain. In addition, the elevator buffer device increases the cross-sectional area of the plunger, and effectively reduces the requirement of the rigidity of the plunger on the mechanical properties of materials. And the molding process difficulty is greatly reduced due to the self taper.

Drawings

The present application may be better understood by describing embodiments thereof in conjunction with the following drawings, in which:

fig. 1 is a schematic structural view of an elevator buffer according to an embodiment of the present application in an uncompressed state.

Fig. 2 is a schematic cross-sectional view of an elevator buffer according to an embodiment of the present application in an uncompressed state.

Fig. 3 is a schematic view of an elevator buffer according to an embodiment of the present application in a compressed state.

Fig. 4 is a schematic cross-sectional view of an elevator buffer according to an embodiment of the present application in a compressed state.

Fig. 5 is a plan view of the buffering device of the elevator of fig. 1.

Fig. 6 is a cross-sectional view at plane C-C in fig. 1.

Fig. 7 is a cross-sectional view at plane C-C in fig. 1.

FIG. 8 is a cross-sectional schematic view of a piston according to one embodiment of the present application.

FIG. 9 is a top view of a piston according to one embodiment of the present application.

FIG. 10 is a cross-sectional schematic view of a hydraulic cylinder according to an embodiment of the present application.

FIG. 11 is a top view of a hydraulic cylinder according to an embodiment of the present application.

The reference numerals in the drawings have the following meanings:

1000 elevator buffer

100 cushioning element

200 piston

201 piston top

202 first piston outer surface

203 first piston inner surface

204 first tubular piston wall

205 outer surface of the second piston

206 second piston inner surface

207 second tubular piston wall

208 annular gap

209 piston cavity

210 piston top through hole

211 piston bottom through hole

300 hydraulic cylinder

301 hydraulic cylinder top

302 hydraulic cylinder bottom

303 outer surface of hydraulic cylinder

304 cylinder inner surface

305 tubular hydraulic cylinder wall

306 hydraulic cylinder cavity

307 cylinder boss

308 groove

309 hydraulic cylinder top through hole

400 installation base

500 limiting rod

501 limiting rod convex part

600 compression spring

700 sealing ring.

Detailed Description

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as is understood by those of ordinary skill in the art to which the invention belongs.

All numerical values recited herein as between the lowest value and the highest value are intended to mean all values between the lowest value and the highest value in increments of one unit when there is more than two units difference between the lowest value and the highest value.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

Definition of terms

Herein, the term "non-metallic composite material" refers to a composite material made by an injection molding process from the following raw materials in parts by weight: 30-94% of polyamide, 5-50% of carbon fiber, 0-50% of glass fiber and 0-16% of toughening agent; the non-metallic composite material comprises all components in a total weight of 100%. For more details of the preparation process and the formula of the non-metal composite material, the Chinese patent application with the publication number of CN111320052A and the title of elevator buffer device made of non-metal composite material and products thereof can be referred.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It is noted that in the detailed description of these embodiments, in order to provide a concise description, all features of an actual implementation may not be described in detail.

Referring first to fig. 1 and 2, fig. 1 is a schematic view of an elevator buffer 1000 in an uncompressed state according to an embodiment of the present application. Fig. 2 is a schematic cross-sectional view of an elevator buffer 1000 according to an embodiment of the present application in an uncompressed state.

As can be seen from fig. 1, an elevator buffer 1000 as described herein may include, in order, a buffer element 100, a piston 200, a hydraulic cylinder 300, and a mounting base 400, in a direction away from an elevator car. As can be seen from fig. 2, a stopper rod 500 is provided in the mounting base 400 to restrict the movement of the piston 200 with respect to the hydraulic cylinder 300. Furthermore, as can also be seen from fig. 2, a return spring 600 is arranged in the annular space 208 of the piston 200. The return spring 600 may be a metal compression spring or a pneumatic spring.

Turning to fig. 2 and referring to fig. 8 and 9, fig. 8 is a cross-sectional structural schematic view of a piston according to one embodiment of the present application. FIG. 9 is a top view of a piston according to one embodiment of the present application. In one embodiment, the piston 200 may include a piston top 201, a first piston outer surface 202, a first piston inner surface 203, a first tubular piston wall 204, a second piston outer surface 205, a second piston inner surface 206, and a second tubular piston wall 207. The first tubular piston wall 204 extends a first length downward from the piston crown in a piston axial direction and a predetermined thickness between the first piston outer surface 202 and the first piston inner surface 203. The second tubular piston wall 207 extends a second length downward from the piston crown in the piston axial direction and a predetermined thickness between the second piston outer surface 205 and the second piston inner surface 206. In one embodiment, the first length is greater than the second length to facilitate a sliding connection of piston 200 with respect to cylinder 300.

In one embodiment, the first tubular piston wall 204 is located peripherally to the second tubular piston wall 207, with an annular gap 208 between the first and second tubular piston walls. The annular gap 208 may include a resilient member disposed around the second tubular piston wall 207, such as a compression spring disposed helically around the second tubular piston wall 207. In one embodiment, the second piston inner surface 206 defines a hollow piston chamber 209, the top of which includes piston top through-holes 210 and the bottom of which includes piston bottom through-holes 211.

In one implementation, referring to fig. 2, 10, and 11, fig. 10 is a cross-sectional structural schematic view of a hydraulic cylinder according to an embodiment of the present application. FIG. 11 is a top view of a hydraulic cylinder according to an embodiment of the present application. In one embodiment, the cylinder 300 includes a cylinder top 301, a cylinder bottom 302, a cylinder outer surface 303, a cylinder inner surface 304, a tubular cylinder wall 305, and a cylinder cavity 306. The tubular cylinder wall 305 extends a third length from the cylinder bottom 302 upwards in the cylinder axial direction and extends a predetermined thickness between the cylinder outer surface 303 and the cylinder inner surface 304. The cylinder bottom 302 further includes a cylinder boss 307 extending upwardly from the cylinder bottom a fourth length in a cylinder axial direction and outwardly in a radial direction along the cylinder outer surface a predetermined thickness.

In one embodiment, the mounting base 400 is used to seal the cylinder bottom 302, forming the cylinder chamber 306 with the tubular cylinder wall 305.

In one embodiment, the elevator buffer 1000 further comprises a limit rod 500, the bottom of the limit rod 500 is disposed within the mounting base 400, and the top of the limit rod extends through the piston bottom through hole 211.

In one embodiment, the damping element 100 is arranged above the piston 200, so that the impact on the damping element 100 takes place first, dissipating a portion of the impact energy.

In one embodiment, the piston 200 is in sliding fit with the cylinder 300, the first tubular piston wall 204 is disposed around the tubular cylinder wall 305, and the first piston inner surface 203 directly contacts the cylinder outer surface 303. The cylinder top 301 comprises a cylinder top through hole 309 adapted for the second tubular piston wall 207 to pass through.

In one embodiment, referring to fig. 5, fig. 5 is a top view of the elevator buffer of fig. 1. In one embodiment, the center of the cushioning element 100 includes a cushioning element through-hole having a radial dimension that is smaller than the radial dimension of the piston element top through-hole 210.

In one embodiment, the bottom of the second piston wall 207 has a tapered portion with a radial dimension that decreases gradually downward along the axial direction of the piston. In one embodiment, the cylinder top 301 has a tapered opening with a radial dimension that gradually increases upward along the cylinder axial direction, the smallest radial dimension of the tapered opening being larger than the largest radial dimension of the tapered portion at the bottom of the second piston wall 207. In one embodiment, the top of the stop rod 500 includes a stop rod protrusion 501, and the radial dimension of the stop rod protrusion 501 is greater than the radial dimension of the piston bottom through hole 211. In this embodiment, there is a clearance as the second piston wall 207 passes through the cylinder top 301, so that the transmission medium in the cylinder 300 can enter the annular clearance 208 of the piston as the piston moves down.

In one embodiment, the cylinder outer surface 303 includes an annular groove 308 closer to the cylinder top 301 for receiving a seal, such as a gasket.

In one embodiment, the cylinder bottom 302 is sealed by the mounting base 400.

In one embodiment, the thickness of the first piston wall 204 is equal to the thickness of the cylinder boss 307 extending outward from the cylinder outer surface in a radial direction of the cylinder outer surface.

In one embodiment, the hydraulic cylinder 300 is used to store hydraulic transmission media, including both oil-based and water-based hydraulic transmission media.

Referring to fig. 6 and 7, wherein fig. 6 is a sectional view at the C-C plane of fig. 1, and fig. 7 is a sectional view at the C-C plane of fig. 1. In one embodiment, the piston 200 and cylinder 300 are both circular in cross-section. But it will be appreciated by those skilled in the art that their cross-sections may be provided in other shapes, such as triangular, rectangular, polygonal, oval, etc.

Next, the operation principle of the elevator buffer described herein will be described with reference to fig. 1 to 4. Fig. 3 is a schematic view of an elevator buffer according to an embodiment of the present application in a compressed state. Fig. 4 is a schematic cross-sectional view of an elevator buffer according to an embodiment of the present application in a compressed state.

Referring first to fig. 1 and 2, before no impact occurs, the elevator buffer 1000 is in an uncompressed state, the compression spring 600 is in a natural extension state, the piston 200 is sleeved on the periphery of the hydraulic cylinder 300, the bottom of the limiting rod 500 is fixed in the mounting base 400, and the top of the limiting rod 500 extends through the piston bottom through hole 211 and enters the piston cavity 209. At this time, the hydraulic cylinder 330 is filled with a hydraulic transmission medium.

After an impact, the elevator car or its counterweight first contacts the buffer element 100, dissipating a portion of the impact energy. If the elevator is not stopped, the piston 200 is pushed further downwards, the piston 200 slides downwards relative to the cylinder 300, and the transmission medium in the cylinder 330 enters the annular gap 208 of the piston 200 through the gap between the second tubular piston wall 207 and the cylinder top through-hole 309. At the same time, the compression spring 600 provided in the piston 200 is compressed by force, and the piston 200 moves downward until the elevator stops or the first tubular piston wall 204 of the piston 200 contacts the cylinder convex portion 307. After the impact is released, the piston 200 and the damping member 100 are restored by the compression spring 600.

In the elevator buffering device 1000 of the present invention, since the cross-sectional area of the piston 200 is larger than the cross-sectional area of the hydraulic cylinder 300, the force per unit area on the buffering element 100 is smaller and more uniform, and the working stroke of the hydraulic cylinder 300 is significantly shortened. Due to the fact that the structural mode enlarges the cross section area of the plunger, the requirement of plunger rigidity on mechanical properties of materials is effectively reduced. And the molding process difficulty is greatly reduced due to the self taper.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. An elevator buffer made of non-metal composite material, characterized in that along a direction away from an elevator car, the elevator buffer comprises in sequence:

a buffer element;

wherein the damping element is disposed above the piston;

2. An elevator buffer made of non-metallic composite material as defined in claim 1 wherein the center of said buffer member includes a buffer member through hole having a radial dimension smaller than the radial dimension of said piston top through hole.

3. The elevator buffer of claim 1 wherein said resilient member is a metal compression spring or a pneumatic compression spring.

4. The elevator buffer of claim 1 wherein the bottom of the second piston wall has a tapered portion with a radial dimension that decreases downward in the axial direction of the piston.

5. The elevator buffer of claim 4 wherein the top of the cylinder has a tapered opening with a radial dimension that increases gradually upward along the axial direction of the cylinder, the minimum radial dimension of the tapered opening being greater than the maximum radial dimension of the tapered portion of the bottom of the second piston wall.

6. The elevator buffer of claim 1 wherein the top of the stop rod includes a stop rod boss having a radial dimension greater than the radial dimension of the piston bottom through hole.

7. The elevator buffer of claim 1 wherein the outer surface of the cylinder at a location closer to the top of the cylinder comprises an annular groove for receiving a seal.

8. The elevator buffer of claim 1 wherein the bottom of the cylinder is sealed by the mounting base.

9. The elevator buffer of claim 1 wherein the thickness of the first piston wall is equal to the thickness of the raised portion of the cylinder extending radially outward from the outer surface of the cylinder.

10. An elevator buffer made of non-metallic composite material according to any of claims 1-9 wherein the hydraulic cylinder is used to store hydraulic transmission medium, the hydraulic transmission medium comprising oil-based hydraulic transmission medium and water-based hydraulic transmission medium.