CN209839079U - Tensioner - Google Patents

Abstract

The utility model provides a tensioning ware belongs to automobile engine accessory technical field. It has solved the unstable problem of current tensioning ware tensile force. This tensioning ware includes the main part, the cavity has been seted up in the main part, be provided with the plunger of cavity form in the cavity, connect channel I has been seted up on the main part, be provided with check valve subassembly I in the cavity, be provided with return spring between check valve subassembly I and the plunger, inner chamber in the plunger is provided with check valve subassembly two, connect channel II has been seted up to the right-hand member face of plunger, check valve subassembly two is by the valve body, the spring holder, buffer spring and ball are constituteed, the oil inlet has been seted up on the valve body, spring holder fixed mounting is in the inner chamber in the valve body, the draining seam has been seted up on the spring holder, the spring holder has seted up out the oil recess towards the terminal surface middle part of. The utility model has the advantages of the tensile force is stable in certain range.

Description

Tensioner

Technical Field

The utility model belongs to the technical field of automobile engine accessory, a tensioning ware is related to.

Background

The tensioner is a commonly used holding device on a belt and chain transmission system, and is characterized in that the belt and a chain can be kept to have proper tension in the transmission process, so that the belt is prevented from slipping, or a synchronous belt is prevented from jumping and falling out due to tooth jumping or tooth dropping, or the chain is prevented from loosening and falling, the abrasion of a chain wheel and the chain is reduced, along with the continuous development of the industrialized era, the demand of the tensioner is more and more large, and the tensioners sold in the market have various types, but have the problems of great size and small size, and influence on use. For example, the tension in the existing tensioner changes along with the change of oil pressure, so that the problem of unstable tension exists in the actual use, and the service life of a chain is influenced.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide one kind and improve life, tensioning force invariable and the tensioning force of tensile force along with the tensioning ware that the oil pressure changed in certain extent.

The purpose of the utility model can be realized by the following technical proposal: a tensioner comprises a main body, wherein a cavity is formed in the main body, a hollow plunger is arranged in the cavity, a first connecting channel communicated with the cavity is formed in the main body, a first check valve assembly matched with the first connecting channel is arranged at the joint of the cavity and the first connecting channel, a return spring is arranged between the first check valve assembly and the plunger, the tensioner is characterized in that a second check valve assembly is arranged in an inner cavity of the plunger, two ends of the return spring are respectively abutted against the first check valve assembly and the second check valve assembly, a second connecting channel communicated with the inside of the plunger and matched with the second check valve assembly is formed in the right end face of the plunger, the second check valve assembly comprises a valve body, a spring seat, a buffer spring and balls, the valve body is fixedly connected with the plunger, and an oil inlet communicated with the inner cavity of the plunger is formed in the valve body, the spring holder fixed mounting in interior intracavity in the valve body, the spring holder on seted up with the communicating draining seam of linking channel two, the spring holder towards the terminal surface middle part of linking channel two seted up inwards sunken and with draining seam matched with oil outlet groove, buffer spring install between valve body and spring holder, and buffer spring's both ends face respectively with corresponding valve body in the terminal surface and the left end face of spring holder inconsistent, ball installation and buffer spring and valve body between, and the ball compresses tightly the oil inlet in the valve body under the buffer spring effect.

In the tensioner, the joint between the oil inlet and the ball in the valve body is provided with an arc-shaped conical surface matched with the ball.

In the above tensioner, the end surface of the spring seat, which is in contact with the buffer spring, is provided with a protruding column which protrudes axially and extends into the buffer spring.

In foretell tensioning ware, the valve body connect the tip through two on the cover be equipped with the sealing washer cover, the sealing washer cover seted up the through-hole towards the middle part of connecting channel terminal surface.

Compared with the prior art, the tensioner has the advantages that the right end face of the plunger is provided with the second connecting channel communicated with the inside of the plunger, the second check valve assembly for controlling the opening and closing of the second connecting channel is arranged at the second connecting channel in the plunger, the second check valve assembly comprises the valve body, the spring seat, the buffer spring and the ball, the valve body is fixedly connected with the plunger, the valve body is provided with an oil inlet communicated with the inner cavity of the plunger, the spring seat is provided with an oil drainage seam communicated with the second connecting channel, the spring seat is provided with an oil outlet groove which is inwards sunken and matched with the oil drainage seam towards the middle part of the end face of the second connecting channel, the buffer spring is arranged between the valve body and the spring seat, two end faces of the buffer spring are respectively abutted against the inner end face of the corresponding valve body and the left end face of the paralyzed seat, the ball is arranged, the hydraulic oil flows out according to internal hydraulic pressure, the outflow rate of different hydraulic states is different, the tension force in a certain range is constant, the tension force cannot change along with the change of the oil pressure, and the service life of the tensioner is ensured.

Drawings

Fig. 1 is a schematic sectional view of the whole of the tensioner.

In the figure, 1, main body; 2. a chamber; 3. a plunger; 4. connecting a first channel; 5. a one-way valve assembly I; 6. a return spring; 7. a one-way valve component II; 8. a second connecting channel; 9. a valve body; 10. a spring seat; 11. a buffer spring; 12. a ball bearing; 13. an oil inlet; 14. oil drainage seams; 15. an oil outlet groove; 16. a raised post; 17. a sealing cushion cover; 18. and a through hole.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, the tensioner comprises a main body 1, a cavity 2 is arranged in the main body 1, a hollow plunger 3 is arranged in the cavity 2, a first connecting channel 4 communicated with the cavity 2 is arranged on the main body 1, a first check valve assembly 5 matched with the first connecting channel 4 is arranged at the joint of the cavity 2 and the first connecting channel 4, a return spring 6 is arranged between the first check valve assembly 5 and the plunger 3, a second check valve assembly 7 is arranged in an inner cavity of the plunger 3, two ends of the return spring 6 are respectively abutted against the first check valve assembly 5 and the second check valve assembly 7, a second connecting channel 8 communicated with the interior of the plunger 3 and matched with the second check valve assembly 7 is arranged on the right end face of the plunger 3, the second check valve assembly 7 is composed of a valve body 9, a spring seat 10, a buffer spring 11 and a ball 12, the valve body 9 is fixedly connected with the plunger 3, an oil inlet 13 communicated with, the spring seat 10 is fixedly installed in an inner cavity in the valve body 9, an oil drainage seam 14 communicated with the second connecting channel 8 is formed in the spring seat 10, an oil outlet groove 15 which is inwards recessed and matched with the oil drainage seam 14 is formed in the middle of the end face, facing the second connecting channel 8, of the spring seat 10, the buffer spring 11 is installed between the valve body 9 and the spring seat 10, two end faces of the buffer spring 11 are respectively abutted to the inner end face of the corresponding valve body 9 and the left end face of the spring seat 10, the ball 12 is installed between the buffer spring 11 and the valve body 9, and the ball 12 presses an oil inlet 13 in the valve body 9 under the action of the buffer spring 11.

In more detail, in order to enable the ball 12 to better press the oil inlet 13, an arc-shaped conical surface matched with the ball 12 is formed at the joint between the oil inlet 13 and the ball 12 in the valve body 9.

More specifically, in order to prevent the cushion spring 11 from being bent during compression, the end surface of the spring seat 10 that abuts against the cushion spring 11 is provided with a projection column 16 that projects in the axial direction and that projects into the cushion spring 11.

In a further elaboration, in order to make the leakproofness of junction better, the cover is equipped with sealing pad cover 17 on the valve body 9 orientation is connected the tip through two, sealing pad cover 17 seted up through-hole 18 towards the middle part of the two 8 terminal surfaces of connecting channel.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (4)

1. A tensioner comprises a main body (1), a cavity (2) is formed in the main body (1), a hollow plunger (3) is arranged in the cavity (2), a first connecting channel (4) communicated with the cavity (2) is formed in the main body (1), a first check valve assembly (5) matched with the first connecting channel (4) is arranged at the joint of the cavity (2) and the first connecting channel (4), a return spring (6) is arranged between the first check valve assembly (5) and the plunger (3), the tensioner is characterized in that a second check valve assembly (7) is arranged in an inner cavity of the plunger (3), two ends of the return spring (6) are respectively abutted against the first check valve assembly (5) and the second check valve assembly (7), a second connecting channel (8) communicated with the interior of the plunger (3) and matched with the second check valve assembly (7) is formed in the right end face of the plunger (3), the check valve assembly II (7) consists of a valve body (9), a spring seat (10), a buffer spring (11) and balls (12), the valve body (9) is fixedly connected with the plunger (3), an oil inlet (13) communicated with the inner cavity of the plunger (3) is formed in the valve body (9), the spring seat (10) is fixedly installed in the inner cavity of the valve body (9), an oil drainage seam (14) communicated with the connecting channel II (8) is formed in the spring seat (10), an oil outlet groove (15) which is sunken inwards and matched with the oil drainage seam (14) is formed in the middle of the end face of the spring seat (10) facing the connecting channel II (8), the buffer spring (11) is installed between the valve body (9) and the spring seat (10), and two end faces of the buffer spring (11) are respectively abutted against the inner end face of the corresponding valve body (9) and the left end face of the spring seat (10), the ball (12) is arranged between the buffer spring (11) and the valve body (9), and the ball (12) presses the oil inlet (13) in the valve body (9) under the action of the buffer spring (11).

2. The tensioner according to claim 1, wherein the connection between the oil inlet (13) and the ball (12) in the valve body (9) is provided with a circular arc-shaped conical surface matched with the ball (12).

3. A tensioner according to claim 1, characterised in that the end surface of said spring seat (10) which is in contact with said damping spring (11) is provided with an axially protruding stud (16) which protrudes into said damping spring (11).

4. The tensioner according to claim 1, wherein said valve body (9) is sleeved with a sealing gasket (17) at the end portion facing the second connecting passage (8), and said sealing gasket (17) is provided with a through hole (18) at the middle portion facing the end surface of the second connecting passage (8).