CN217152808U

CN217152808U - Elevator buffer

Info

Publication number: CN217152808U
Application number: CN202221091522.3U
Authority: CN
Inventors: 李建忠; 郭利广; 陈宇强; 吴海棠
Original assignee: Foshan Guangyang Elevator Parts Co ltd
Current assignee: Foshan Guangyang Elevator Parts Co ltd
Priority date: 2022-05-07
Filing date: 2022-05-07
Publication date: 2022-08-09
Anticipated expiration: 2032-05-07

Abstract

The utility model discloses an elevator buffer, which comprises a plunger and an oil cylinder with an installation seat plate at the bottom, wherein the inner cavity of the plunger is communicated with the cylinder cavity of the oil cylinder, the upper end of a main cylinder body of the oil cylinder is provided with a necking part, the necking part extends upwards to form an upper cylinder part which is contracted in the radial direction relative to the main cylinder body, a sliding channel in sliding fit with the plunger is formed in the upper cylinder part, and the plunger is installed in the sliding channel in a sealing fit manner; when the oil cylinder body of the elevator buffer is processed, the upper end of the cylindrical cylinder body is reduced through a press machine such as a vertical oil press or a horizontal oil press to form an upper cylinder part, and then only the inner hole of the reduced part, namely the upper cylinder part, is processed to be used as a sliding channel in sliding fit with a plunger.

Description

Elevator buffer

Technical Field

The utility model relates to an elevator buffer for elevator overspeed protection especially relates to an elevator buffer that makes the plunger reset through the spring by plunger and hydro-cylinder cooperation.

Background

The hydro-cylinder body of current elevator buffer generally adopts seamless steel pipe, and one of them mode is: processing the inner wall of the seamless steel tube, wherein one end of the seamless steel tube is small in inner hole, the other end of the seamless steel tube is large in inner hole, and the small end of the seamless steel tube is used as a plunger sliding channel; the other mode is as follows: and (3) adding a bush in the seamless steel pipe, and using the bush as a channel for sliding the plunger. The oil cylinder manufacturing method of the existing elevator buffer has the problems of large machining allowance, complex structure, high required precision, troublesome manufacturing and high manufacturing cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure, manufacturing and simple to operate, machining allowance and precision are little, low in manufacturing cost's elevator buffer.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the elevator buffer comprises a plunger and an oil cylinder with a mounting base plate at the bottom, wherein an inner cavity of the plunger is communicated with a cylinder cavity of the oil cylinder, a necking part is arranged at the upper end of a main cylinder body of the oil cylinder, the necking part extends upwards to form an upper cylinder part which contracts in the radial direction relative to the main cylinder body, a sliding channel in sliding fit with the plunger is formed in the upper cylinder part, and the plunger is mounted in the sliding channel in a sealing fit manner.

When the cylinder body of the elevator buffer is processed, the upper end of the cylindrical cylinder body is reduced through a press machine such as a vertical oil press or a horizontal oil press to form an upper cylinder part, and then only the inner hole of the reduced part, namely the upper cylinder part, is processed to be used as a sliding channel in sliding fit with the plunger piston.

The utility model discloses following beneficial effect has:

the utility model discloses elevator buffer has simple structure, manufacturing and simple to operate, machining allowance and precision little, low in manufacturing cost's advantage.

Drawings

Fig. 1 is a schematic structural view of the elevator buffer of the present invention.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments so as to more clearly understand the technical idea claimed in the invention.

As shown in fig. 1, the elevator buffer comprises a plunger 1, an oil cylinder 2 and a spring support plate 3, hydraulic oil is injected into the oil cylinder 2, an installation seat plate 21 is fixedly welded at the bottom of a main cylinder body 20 of the oil cylinder 2, a necking portion 22 is arranged at the upper end of the main cylinder body 20 of the oil cylinder 2, the necking portion 22 extends upwards to form an upper cylinder portion 23 which contracts in the radial direction relative to the main cylinder body 20, a sliding channel 24 in sliding fit with the plunger 1 is formed in the upper cylinder portion 23, the plunger 1 is installed in the sliding channel 24 in sealing fit, and meanwhile, a communication hole 10 which enables an inner cavity of the plunger 1 to be communicated with a cylinder cavity of the oil cylinder 2 is formed at the bottom end of the plunger 1.

Wherein, the outer wall of upper cylinder portion 23 is equipped with location step 25, and it places spring support plate 3 to lie in the peripheral support of upper cylinder portion 23 on location step 25, and spring support plate 3 welded fastening can establish the spring that drives plunger 1 and reset on plunger 1 through spring support plate 3 cover. In this embodiment, the spring support plate 3 is welded and fixed by welding the bottom portion thereof to the positioning step 25.

In the present embodiment, the plunger 1 is sealingly engaged with the slide passage 24, specifically, a seal ring groove 26 is provided in a wall surface of the slide passage 24, and a seal ring 27 sealingly engaged with the plunger 1 is fitted in the seal ring groove 26. The seal ring groove 27 is specifically provided on the upper end and lower end wall surfaces of the slide passage 24, the seal ring groove 26 is a rectangular ring groove, and the seal ring 27 is a 0-type seal ring. The plunger 1 prevents the hydraulic oil in the oil cylinder 2 from leaking out during the sliding and lifting work through the sealing fit of the sealing ring 27. Of course, in other embodiments, the arrangement position and number of the seal ring grooves 26, the shape of the seal ring grooves 26, and the shape of the seal ring 27 are not limited to those in the present embodiment, and may be other forms that can achieve good sealing engagement of the plunger 1, and are not listed here.

When the cylinder body of the elevator buffer is processed, the upper end of the cylindrical cylinder body is reduced by a press machine such as a vertical oil press or a horizontal oil press to form an upper cylinder part 23, then only the inner hole of the upper cylinder part 23 which is the reduced part is processed to be a sliding channel 24 in sliding fit with the plunger 1, a sealing ring groove 26 is processed on the wall surface of the sliding channel 24 to be used as a sealing ring 27, a positioning step 25 is processed on the outer wall of the upper cylinder part 23 to support and place the spring support plate 3, the installation structure is simple, the processing and the installation are easy and convenient, the processing allowance and the precision are small, and the manufacturing cost is low.

Various other changes and modifications may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such changes and modifications should fall within the scope of the present invention.

Claims

1. The elevator buffer comprises a plunger and an oil cylinder with an installation seat plate at the bottom, wherein an inner cavity of the plunger is communicated with a cylinder cavity of the oil cylinder, and the elevator buffer is characterized in that a necking part is arranged at the upper end of a main cylinder body of the oil cylinder, the necking part extends upwards to form an upper cylinder part which is contracted in the radial direction relative to the main cylinder body, a sliding channel in sliding fit with the plunger is formed in the upper cylinder part, and the plunger is installed in the sliding channel in a sealing fit manner.

2. The elevator buffer of claim 1 wherein said sliding channel wall is provided with a gasket groove, and said gasket groove is fitted with a gasket that sealingly engages said plunger.

3. The elevator buffer of claim 2, wherein the seal grooves are formed in the upper and lower end wall surfaces of the slide passage, respectively.

4. The elevator buffer of claim 2 or 3 wherein said seal groove is a rectangular ring groove and said seal is an O-ring.

5. The elevator buffer according to any of claims 1 to 3, wherein the outer wall of the upper cylinder is provided with a positioning step, a spring support plate is supported and placed on the positioning step at the periphery of the upper cylinder, and the spring support plate is welded and fixed.

6. The elevator buffer of claim 5, wherein a bottom portion of the spring support plate is welded to the positioning step.