CN208295061U - A kind of stretcher - Google Patents

Abstract

The utility model provides a kind of stretcher, belongs to automobile engine accessory technical field.It solves the problems, such as that existing stretcher can not adjust chain elasticity in time.This stretcher includes main body, chamber is offered in main body, plunger is provided in chamber, interface channel is offered on the side wall of main body, the joint of chamber and interface channel is provided with check valve assembly, it is provided with right above check valve assembly in chamber with tooth form gear and the stepping axis that is in contact with plunger inner wall, ring washer is provided between stepping axis and check valve assembly, the inner sidewall of plunger, which is located at the tooth form gear in stepping axis, is provided with the limited block matched with tooth form gear, the mandrel matched with stepping axis is provided in stepping axis, return spring is arranged on the mandrel in stepping axis, pipe fitting is provided at the oral area of main body, it is located at right above pipe fitting at the oral area of main body and is provided with circlip.The utility model has the advantages that adjust chain elasticity in time.

Description

A kind of stretcher

Technical field

The utility model belongs to automobile engine accessory technical field, in particular to a kind of stretcher.

Background technique

Stretcher is belt, common holding meanss on chain transmission system, its main feature is that belt, chain is kept to be driven Tensile force appropriate can be possessed in the process, to avoid belt slippage, or synchronous belt is avoided to occur to jump tooth, take off tooth and haul out, It either prevents chain-loose, fall off, mitigating sprocket wheel, chain wear, as industrial age constantly develops, the need of stretcher Ask increasing, the stretcher type of commercial type is all kinds of, but there is also big and small problem, influence using.

For example the overhanging length of plunger can not adjust in time, be unable to ensure chain and be in suitable elasticity, long-term Work in keep the abrasion of chain excessive, reduce the service life of chain, or even cause the accidental damage of stretcher, influence to be tensioned The service life of device.

Summary of the invention

The purpose of this utility model is to provide a kind of adjusting chain in time for the above-mentioned problems in the prior art The stretcher of elasticity.

The purpose of this utility model can be realized by the following technical scheme: a kind of stretcher, including main body, the master Chamber is offered in vivo, the plunger of hollow form is provided in the chamber, is offered on the side wall of the main body and chamber phase The interface channel of connection, the chamber are provided with the check valve assembly matched with interface channel with the joint of interface channel, It is provided with right above check valve assembly with tooth form gear and connects with plunger inner wall it is characterized in that, being located in the chamber The stepping axis of touching, and the upper end of stepping axis extends to plunger body and there are gap, the steppings with the upper surface in plunger Ring washer is provided between axis and check valve assembly, the inner sidewall of the plunger, which is located at the tooth form gear in stepping axis, to be arranged There is the limited block matched with tooth form gear, be provided with the mandrel matched with stepping axis in the stepping axis, is located at stepping Return spring is arranged on mandrel in axis, one end of the return spring and the lower end of mandrel are inconsistent, and return bullet The other end of spring and plunger are inconsistent, and the pipe fitting matched with plunger, the mouth of the main body are provided at the oral area of the main body It is located at right above pipe fitting at portion and is provided with the circlip for preventing pipe fitting from falling off.

In a kind of above-mentioned stretcher, the entrance of the interface channel is provided with gasket component.

In a kind of above-mentioned stretcher, O-ring is provided on the side wall of the pipe fitting.

Compared with prior art, this stretcher is provided with the stepping axis with tooth form gear, the inside of plunger in chamber Wall, which is located at the tooth form gear in stepping axis, is provided with the limited block matched with tooth form gear, is provided with and walks in stepping axis The mandrel matched into axis is arranged with return spring on the mandrel in stepping axis, is provided at the oral area of main body and plunger The pipe fitting matched is located at the oral area of main body right above pipe fitting and is provided with the circlip for preventing pipe fitting from falling off.Work as plunger When rising, stepping axis is set to follow plunger since the setting of spring and mandrel makes plunger generate active force to stepping axis when rising Rise and rotate, due to being provided with tooth form gear on stepping axis, the limited block of plunger is made to have been at flute profile shelves when rising On position, guarantees that plunger will not bounce back, due to the setting of pipe fitting and circlip, will not fall off plunger when not stressing.

Detailed description of the invention

Fig. 1 is integrally-built schematic cross-sectional view in this stretcher.

Fig. 2 is the expanded schematic diagram of stepping axis in this stretcher.

Fig. 3 is the three-dimensional structure diagram of stepping axis in this stretcher.

In figure, 1, main body；2, chamber；3, plunger；4, interface channel；5, check valve assembly；6, stepping axis；7, air ring Circle；8, limited block；9, mandrel；10, return spring；11, pipe fitting；12, circlip；13, gasket component；14, O-shaped Circle.

Specific embodiment

It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further Description, but the utility model is not limited to these examples.

As shown in Figure 1, Figure 2, Figure 3 shows, this stretcher, including main body 1 offer chamber 2 in main body 1, are provided in chamber 2 The plunger 3 of hollow form, offers the interface channel 4 being connected with chamber 2 on the side wall of main body 1, chamber 2 and interface channel 4 Joint is provided with the check valve assembly 5 matched with interface channel 4, is arranged in chamber 2 positioned at the surface of check valve assembly 5 Have with tooth form gear and the stepping axis 6 that is in contact with 3 inner wall of plunger, the upper end of stepping axis 6 is to 3 internal stretch of plunger and and column There are gaps for upper surface in plug 3, and ring washer 7, the inner sidewall position of plunger 3 are provided between stepping axis 6 and check valve assembly 5 It is provided with the limited block 8 matched with tooth form gear at tooth form gear in stepping axis 6, is provided with and walks in stepping axis 6 The mandrel 9 matched into axis 6, is arranged with return spring 10 on the mandrel 9 in stepping axis 6, one end of return spring 10 with The lower end of mandrel 9 is inconsistent, and the other end and plunger 3 of return spring 10 are inconsistent, is provided at the oral area of main body 1 and plunger 3 pipe fittings 11 matched, the surface that pipe fitting 11 is located at the oral area of main body 1 are provided with the circlip for preventing pipe fitting 11 from falling off 12。

The working principle of this stretcher: when stretcher work, the oil supply mechanism in engine is logical by connection by machine oil Road 4 and check valve assembly 5 enter chamber 2, and the pressure of hydraulic generation and the compressing force of spring itself rise plunger 3, due to bullet The setting of spring and mandrel 9 makes plunger 3 so that stepping axis 6 is followed the rising of plunger 3 the generation active force of stepping axis 6 when rising and revolves Turn, due to being provided with tooth form gear on stepping axis 6, has been at the limited block 8 of plunger 3 in flute profile gear when rising It on tooth socket, recycle plunger 3 will not in decompression.

As preferred structure, the entrance of interface channel 4 is provided with gasket component 13.It is arranged on the side wall of pipe fitting 11 There is O-ring 14.

The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.

Although be used more herein main body 1, chamber 2, plunger 3, interface channel 4, check valve assembly 5, stepping axis 6, Ring washer 7, limited block 8, mandrel 9, return spring 10, pipe fitting 11, circlip 12, gasket component 13, O-ring 14 Equal terms, but it does not exclude the possibility of using other terms.The use of these items is only for more easily describe to conciliate Release the essence of the utility model；Being construed as any additional limitation is disagreed with the spirit of the present invention 's.

Claims (3)

1. a kind of stretcher, including main body (1), the main body (1) is interior to be offered chamber (2), setting in the chamber (2) There is the plunger (3) of hollow form, the interface channel (4) being connected with chamber (2) is offered on the side wall of the main body (1), it is described Chamber (2) is provided with the check valve assembly (5) matched with interface channel (4) with the joint of interface channel (4), and feature exists In be located at right above check valve assembly (5) in, the chamber (2) be provided with tooth form gear and with plunger (3) inner wall phase The stepping axis (6) of contact, and the upper end of stepping axis (6) to plunger (3) internal stretch and with the upper surface in plunger (3) there are Gap is provided with ring washer (7), the inner sidewall position of the plunger (3) between the stepping axis (6) and check valve assembly (5) The limited block (8) matched with tooth form gear is provided at tooth form gear in stepping axis (6), the stepping axis (6) is interior It is provided with the mandrel (9) matched with stepping axis (6), is arranged with return spring on the mandrel (9) being located in stepping axis (6) (10), one end of the return spring (10) and the lower end of mandrel (9) are inconsistent, and the other end of return spring (10) with Plunger (3) is inconsistent, and the pipe fitting (11) matched with plunger (3), the main body (1) are provided at the oral area of the main body (1) Oral area at be located at pipe fitting (11) right above be provided with the circlip (12) for preventing pipe fitting (11) from falling off.

2. a kind of stretcher according to claim 1, which is characterized in that the entrance of the interface channel (4) is arranged There are gasket component (13).

3. a kind of stretcher according to claim 1, which is characterized in that be provided with O on the side wall of the pipe fitting (11) Type circle (14).