WO2019011082A1

WO2019011082A1 - Telescopic pipe buffer structure

Info

Publication number: WO2019011082A1
Application number: PCT/CN2018/090210
Authority: WO
Inventors: 张钊
Original assignee: 东莞威信运动用品有限公司
Priority date: 2017-07-10
Filing date: 2018-06-07
Publication date: 2019-01-17
Also published as: EP3653832A1; CN207033331U; EP3653832B1; DK3653832T3; EP3653832A4

Abstract

A telescopic pipe buffer structure (100), comprising an inner tube (1), an outer tube (2), a buffer plate (3), a gear plate (4), and a guide sleeve (5); the inner tube (1) is slidably sleeved in the outer tube (2); the buffer plate (3), the gear plate (4), and the guide sleeve (5) correspond to the cross section of the inner tube (1); the guide sleeve (5) is fixed on an end face of the inner tube (1); the gear plate (4) is fixed on the guide sleeve (5) by means of a screw (7); a surrounding accommodating groove (6) is formed between the gear plate (4) and the guide sleeve (5); and the buffer plate (3) is provided at one side of the accommodating groove (6) close to the gear plate (4). The buffer structure (100) can enable a telescopic ladder to be cached when extending and to be rapidly retracted.

Description

Telescopic tube buffer structure

Technical field

The present application relates to a telescopic ladder, and more particularly to a telescopic tube cushioning structure.

Background technique

The existing telescopic ladder includes a plurality of ladder columns and cross bars, and the telescopic function of the ladder is realized by sliding and sliding the plurality of ladder columns to each other. In some cases, it is usually necessary to fix the top end of the telescopic ladder to the wall or the beam. Therefore, when in use, the lowermost step of the telescopic ladder is pulled downward, and the lower step is used to drive the ladder. a ladder column to gradually expand the entire ladder downward; when not in use, first push the lowermost ladder column upwards, so that the previous ladder column is retracted into the next ladder column, in this order Shrink upwards to retract the entire ladder. However, in the above-mentioned unfolding or folding process, since there is no buffer between the inner tube and the outer tube on the ladder column, when the next step column slides downward relative to the previous step column, the tension and gravity are Under the action, it is very likely that the sliding speed is too fast, and the operator's body is inclined, which creates a safety problem. Therefore, between the inner tube and the outer tube of the telescopic ladder that is hung on the wall or the beam. The buffering effect is not good and there is a shortage of safe use problems.

Application content

The purpose of the present application is to provide a telescopic tube buffer structure that has a simple structure, a good cushioning effect, and improved safety in use.

In order to achieve the above object, the telescopic tube buffer structure provided by the present application includes an inner tube and an outer tube. The inner tube is slidably sleeved in the outer tube, and the telescopic tube buffer structure further includes a buffer sheet and a retaining piece. The retaining plate is fixed to one end of the inner tube, and a receiving groove is formed between the blocking piece and the end surface of the inner tube, and the buffer sheet is disposed on the retaining piece and is located adjacent to the receiving piece. a side of the groove, the edge of the buffer sheet is in contact with the inner side wall of the outer tube, so that the edge of the buffer sheet is turned into the receiving groove when the inner tube is retracted into the outer tube Wherein, when the outer tube is extended, the edge of the cushion sheet is slidably pressed against the inner side wall of the outer tube to achieve cushioning.

Compared with the prior art, the present application forms a receiving groove between the end surface of the inner tube and the end surface of the inner tube by providing a shifting piece at one end of the inner tube, and in the blocking A buffer sheet is disposed on a side of the bit sheet adjacent to the accommodating groove, so that an edge of the buffer sheet can be in contact with an inner side wall of the outer tube, so that the buffer sheet is turned up when the telescopic ladder is contracted. The frictional force is reduced, and when the ladder is deployed, the cushioning sheet is blocked by the retaining piece to maintain the sliding contact with the inner side wall of the outer tube, thereby achieving buffering during deployment, and the structure is simple and buffered. The effect is good, and the safety problem that the operator's body is inclined when the ladder column is slid out too quickly when the telescopic ladder is deployed is prevented, and the safety of the use of the telescopic ladder is effectively improved.

Preferably, the telescopic tube buffer structure further comprises a guiding sleeve, and the guiding sleeve is fixed on an end surface of the inner tube. The guide sleeve can guide the inner tube when the inner tube slides relative to the outer tube.

Preferably, the buffer sheet is a silica gel sheet. The silicone material has elastic deformation and a large friction coefficient, which can increase the friction and improve the buffering effect when used.

Preferably, the receiving groove surrounds the inner tube.

Preferably, the inner tube and the outer tube are triangular tubes.

DRAWINGS

Fig. 1 is a view showing a state in which a telescopic ladder of the present application is mounted on a beam.

2 is a structural view of a bellows buffer structure of the present application.

3 is a cross-sectional state view of the bellows buffer structure of the present application when the ladder is stretched.

4 is a cross-sectional state view of the bellows buffer structure of the present application when the ladder is contracted.

Detailed ways

The details of the technical contents, structural features, and effects achieved by the present application will be described in detail below with reference to the embodiments.

As shown in FIG. 2 and FIG. 3, the telescopic tube buffer structure 100 of the present application includes an inner tube 1 and an outer tube 2, the inner tube 1 is slidably sleeved in the outer tube 2; the inner tube 1 and the inner tube The outer tube 2 is a triangular tube. The bellows buffer structure 100 further includes a buffer sheet 3, a shifting piece 4 and a guiding sleeve 5; the buffer sheet 3, the shifting piece 4 and the guiding sleeve 5 have a cross section corresponding to the cross section of the inner tube 1. The retaining plate 4 is fixed to one end of the inner tube 1 by a screw 7, and the receiving plate 4 and the end surface of the inner tube 1 form a receiving groove 6 surrounding the inner tube 1. The guiding sleeve 5 is fixed on the end surface of the inner tube 1 and located on a side close to the receiving groove 6 so that the guiding sleeve 5 faces the shifting piece and the intermediate receiving groove 6 is separated. The guide sleeve 5 can guide the inner tube 1 when the inner tube 1 slides relative to the outer tube 2. The buffer sheet 3 is disposed on the shifting plate 4 and located on a side close to the accommodating groove 6. The edge of the buffer sheet 3 is in contact with the inner side wall of the outer tube 2, so that the inner portion When the tube 1 is retracted into the outer tube 2, the edge of the buffer sheet 3 is turned into the accommodating groove 6, and when the outer tube 2 is extended, the edge of the cushion sheet 3 is slidably pressed Buffering is achieved on the inner side wall of the outer tube 2.

The buffer sheet 3 is a silicone sheet. The silicone material has elastic deformation and a large friction coefficient, which can increase the friction and improve the buffering effect when used.

As shown in FIG. 1 and FIG. 4, when the telescopic ladder 200 is deployed, the upper end of the telescopic ladder 200 is fixed to the beam 300, and the lowermost step of the telescopic ladder 200 first protrudes downward, and therefore, the outer tube 2 sliding downward relative to the inner tube 1, at the beginning of the sliding, the edge of the cushion sheet 3 slidingly interferes with the inner side wall of the outer tube 2, and occurs downward with the tendency of the outer tube 2 to slide downward. Deformation, however, due to the blocking action of the lower stop plate 4, the edge of the cushion sheet 3 can only contact the inner side wall of the outer tube 2 and generate greater frictional resistance, therefore, the buffer The sheet 3 prevents the outer tube 2 from sliding downward to achieve the function of buffering the outer tube 2. When the telescopic ladder 200 is contracted, the lowermost one-piece sub-column is contracted upward, so that the outer tube 2 slides upward relative to the inner tube 1, and at the beginning of the sliding, the edge of the cushion sheet 3 is The inner side wall of the outer tube 2 is in sliding contact with the outer tube 2 and deforms upward with the tendency of the outer tube 2 to slide. However, since the upper surface of the buffer sheet 3 is the accommodating groove 6, the edge of the buffer sheet 3 can be Turning into the accommodating groove 6 upwardly, thereby reducing the pressure in contact with the inner side wall of the outer tube 2, thereby reducing the frictional resistance, so that the outer tube 2 is quickly and smoothly slidably connected to the inner tube 1 To achieve a discount.

Compared with the prior art, the present application forms a receiving groove 6 between the end surface of the inner tube 1 and the end surface of the inner tube 1 by providing the limiting piece 4 at one end of the inner tube 1. And a buffer sheet 3 is disposed on a side of the range piece 4 adjacent to the accommodating groove 6, so that an edge of the buffer sheet 3 can be in contact with an inner side wall of the outer tube 2 to achieve the expansion and contraction. When the ladder 200 is contracted, the cushion sheet 3 is turned up to reduce the frictional force. When the ladder is deployed, the cushion sheet 3 is blocked by the shifting piece 4 to keep in sliding contact with the inner side wall of the outer tube 2. The purpose is to realize the buffering at the time of deployment, the structure is simple, the buffering effect is good, and the safety problem that the operator's body is tilted due to the ladder column falling out too quickly when the telescopic ladder 200 is deployed is prevented, and the telescopic effect is effectively improved. The safety of the ladder 200.

The above is only the preferred embodiment of the present application, and the scope of the application is not limited thereto, and the equivalent changes made by the scope of the application of the present application are still within the scope of the present application.

Claims

A telescopic tube buffer structure includes an inner tube and an outer tube, wherein the inner tube is slidably sleeved in the outer tube, wherein the telescopic tube buffer structure further comprises a buffer sheet and a shifting piece, and the blocking portion The locating sheet is fixed to the one end of the inner tube, and the accommodating sheet is formed on the slat sheet and is located adjacent to the accommodating groove. a side of the buffer sheet that is in contact with the inner side wall of the outer tube, so that the edge of the buffer sheet is turned into the receiving groove when the inner tube is retracted into the outer tube. When the outer tube is extended, the edge of the cushion sheet is slidably pressed against the inner side wall of the outer tube to achieve cushioning.
The telescopic tube buffer structure according to claim 1, wherein the telescopic tube buffer structure further comprises a guiding sleeve, and the guiding sleeve is fixed on an end surface of the inner tube.
The bellows buffer structure according to claim 1, wherein the buffer sheet is a silicone sheet.
The bellows buffer structure of claim 1 wherein said receiving groove surrounds said inner tube.
The bellows buffer structure according to claim 1, wherein said inner tube and said outer tube are triangular tubes.