CN2140845Y - Slidable and non-slip pulleys - Google Patents

Abstract

A sliding and anti-slip pulley is composed of rollers on two sides of a main shell and a brake element which can be selectively installed or not, and is characterized in that: the main shell body is equipped with a cap portion matched with the appearance of roller, and a middle wall plate is placed along the cap, and the centre of said wall plate is equipped with a shaft hole, one side of said shaft hole is equipped with a connecting pipe which can be upwards extended, and its another side contains a concave groove whose opening is downward, and the rollers of two sides are equipped with central shafts which can be passed through the above-mentioned shaft hole and mutually combined, and the inner peripheral surface of the roller is equipped with several spacing pieces, and between every spacing piece and spacing piece a gap space is formed, and on the brake element a short shaft pin for stopping can be inserted into or.

Description

Sliding and skid-resistant pulley

The utility model relates to a kind of pulley structure, and You Zhineng selects whether install braking components with single structure, and can make things convenient for the pulley structure that uses as the pulley that can brake or not brake simultaneously.

The general furniture of using as office seating, for moving it conveniently, all can be provided with pulley in seat bottom.This series products is put because of pulley adds has sizable ease of use.But some similar product then not only need make its convenient slip, also need be located in case of necessity to make it reason is not stressed and mobile.With general common furniture is example, needs by sliding when mobile except usual, after it is pushed into fixed point, need fixedly make its unlikely slip with again.

This early stage class furniture only merely is equipped with roller, and is rotatable during these roller stress.But after often the phase uses, realize and pulley must be made fixedly sometimes that it is mobile the sick bed of desired location (as be pushed into).Therefore be to have the pulley that contains brake gear to come out.

With the pulley of brake gear, it must be provided with relevant brake member in pulley, makes its integral structure and the pulley of general no brake member that sizable difference be arranged.And modern pulley is mostly with injection-moulding plastic, and therefore the pulley that can brake is essential uses a kind of mould, and the pulley that can not brake then need use another kind of mould, and is quite uneconomical.

And in factory, make on the practice, the pulley of these two kinds of non-congenerous also can't substitute mutually.That is if a product will be loaded onto the pulley that can brake, the pulley that then generally can not brake promptly can't be suitable for.But cost is improved relatively if on the product that need not to brake, install the pulley that to brake.

Therefore, the purpose of this utility model is to overcome above-mentioned shortcoming, and a kind of pulley that improves structure is provided.

What the utility model proposes slidably is made up of main casing two side wheels and the members such as braking components that can select whether to install with the pulley of on-slip, wherein, main casing is provided with the cap part of a cooperation roller profile, has a middle wallboard along cap, these wallboard central authorities establish axis hole, this axis hole one side is provided with the connection pipe that protrudes upward, opposite side then contains a chase groove that Open Side Down, two side wheels then are provided with for the center shaft that passes above-mentioned axis hole and make up mutually, and be provided with a plurality of distance pieces in its roller inner peripheral surface, form a clearance space between each partition and distance piece, above-mentioned braking components also contains the backstop stub axle pin that snaps in or break away from this clearance space.

Novelty of the present utility model and other characteristics are described in detail as follows conjunction with figs. and preferred embodiment, wherein:

Fig. 1 is the stereo appearance figure of the utility model embodiment;

Fig. 2 is the element exploded view of the utility model embodiment;

Fig. 3 is that the utility model is implemented the combination of elements cut-away view.

See also Fig. 1 and 2, the utility model roughly comprises primary members such as main casing 10, two side wheels 20,30 and braking components 40.Wherein, main casing 10 is provided with the cap part 11 of a cooperation roller 20,30 profiles, and along being provided with a middle wallboard 12 in the cap, these wallboard 12 central authorities have a central axis hole 13; 14 of one side connection pipes protrude upward cap 11 parts.Then be provided with a chase groove 15 on the middle wallboard 12 on central axis hole 13 sides, Open Side Down to make it.

Two side wheels 20,30 roughly are made as identical shaped, and wherein a roller 20 is provided with center shaft 21, and 30 on another roller contains the trepanning (not shown) in relative position.When two rollers 20,30 are connected to main casing 10 both sides, center shaft 21 can pass its central axis hole 13, both mutual sleeves are incorporated on the main casing 10, inner peripheral surface at this two roller 20,30 then is respectively equipped with a plurality of distance pieces 26, then forms the clearance space 27 of an appropriateness between each partition 26 and distance piece 26.

The main body of one braking components 40 is made as L shaped, be provided with compressing tablet 42 in the top of a flanging 41 wherein, other holds 410 of flangings to be made of the two fork sheets that separate 43,44, adorn a suitably big or small axostylus axostyle 45 in 43,44 Jie of two fork sheets, and extend backstop stub axle pin 46,47 respectively in the front end both sides of fork sheet 43,44.

Behind whole pulley combination, the default axostylus axostyle 45 of above-mentioned braking components 40 can be placed in the chase groove 15 of main casing 10, and makes its two front bottom end of pitching sheet 43,44 be pressed against the summary upper limb periphery (as shown in Figure 3) of central axis hole 13.The corner of whole braking components 40 will roughly be positioned at a side root edge of main casing 10, and it is outside that its default compressing tablet 42 then exposes the pulley wheel.

Before the application of force did not press down, two side wheels 20,30 were not subjected to any obstruction, can be free to slide in braking components 40.But when the arrow A direction presses down, see Fig. 3 at compressing tablet 42 for details, whole braking components 40 will be the axle center with axostylus axostyle 45, make its another flanging 410 along the arrow B direction toward interior leaning on.When compressing tablet 42 downwards the time, then its in addition end then oppositely upwarp.Its fork sheet 43,44 front end stub axle pin 46,47 can be snapped in the clearance space 27 of 26 of each partition 26 and partitions.At this moment, two side wheels 20,30 are promptly ended by card and no longer can the application of force rotate.Otherwise if compressing tablet 42 is upwards pulled, then these stub axle pin 46,47 break away from clearance space 27, and whole pulley can move freely again.

As can be seen from Figure, whole pulley can work as general pulley and use, and when loading onto braking components 40, then can have the function of prevention pulley rolling if when not installed braking components 40.That is, only to make each primary member of pulley with single group of mould, can make slidably the pulley with two kinds of patterns of on-slip, quite economical and practical.When braking components damages, then can separately it be changed and repair, but need not as on-slip pulley commonly used, when braking components damages, to be about to whole pulley and to scrap.

In sum, the utility model is simple in structure, and is convenient and practical, and low cost of manufacture, is a kind of desirable pulley gear.

Claims (3)

1. A slidable and non-slip pulley, which is composed of rollers on both sides of the main housing and brake elements that can be installed or not. It is characterized in that: the main housing is provided with a cap part that matches the shape of the rollers. There is an intermediate wallboard along the cap, and a shaft hole is set in the center of the wallboard. One side of the shaft hole is provided with a connecting pipe protruding upwards, and the other side has a concave groove with an opening downwards. The rollers on both sides are provided with The central shaft that passes through the above-mentioned shaft hole and is combined with each other is provided with a plurality of spacers on the inner peripheral surface of the roller. A gap space is formed between each spacer and the spacer. The stopper uses a short shaft pin. 2. The pulley according to claim 1, characterized in that: the main body of the brake element is L-shaped, and a pressure piece is provided on the top of one of the folded edges, and the other folded edge is provided with a sleeve to be placed in the recess of the main casing. The shaft rod of the groove is provided with a short shaft pin for a stop near the front end. 3. The pulley according to claim 1, characterized in that: one side of the braking element is composed of two separate forks, a shaft is installed between the two forks, and the proximal end of the fork extends to both sides. Two stub pins.

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