CN213117329U

CN213117329U - Hydraulic tensioner assembly

Info

Publication number: CN213117329U
Application number: CN202022081131.0U
Authority: CN
Inventors: 李玉平
Original assignee: Taizhou Tengyu Machinery Co ltd
Current assignee: Taizhou Tengyu Machinery Co ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-05-04
Anticipated expiration: 2030-09-21

Abstract

The utility model provides a hydraulic pressure rises and tightly installs assembly belongs to mechanical technical field. It has solved the current hydraulic pressure and has risen the problem that the ware structure is single and the leakproofness is poor. The hydraulic tensioner assembly comprises a lower shell cover, an upper shell cover, a dustproof sleeve, a plastic sleeve and an inner sleeve, wherein an oil cylinder assembly with a plunger inside is arranged in the upper shell cover, a push rod is connected in the lower shell cover, the lower end part of the push rod extends into the oil cylinder assembly and is matched with the plunger, a guide ring for the push rod to extend into is arranged on the oil cylinder assembly, the lower shell cover and the upper shell cover are connected in a sealing mode to form a closed cavity inside, one end of the return spring abuts against the inner top wall of the lower shell cover, the other end of the return spring abuts against the inner bottom wall of the upper shell cover, the return spring is sleeved on the guide ring and the oil cylinder assembly, and an oil seal with a sealing effect is arranged between the lower shell cover and the upper shell cover. The utility model has the advantages of stable structure and good sealing performance.

Description

Hydraulic tensioner assembly

Technical Field

The utility model belongs to the technical field of machinery, a hydraulic pressure rises and tightly installs assembly 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 the chain can be kept to have proper tension in the transmission process, so that the belt is prevented from slipping, the synchronous belt is prevented from jumping and falling off, or the chain is prevented from loosening and falling off, and the abrasion of a chain wheel and the chain is reduced. The existing tensioner is single in structure, air is easily brought into a high-pressure cavity to form an idle stroke when an internal plunger moves upwards, and in addition, the existing tensioner is poor in sealing effect and causes oil leakage.

Disclosure of Invention

The utility model aims at providing a stable in structure and good hydraulic pressure tight ware assembly that rises of leakproofness to the above-mentioned problem that exists among the prior art.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a hydraulic tensioner assembly, its characterized in that, includes casing lower cover, casing upper cover, dirt proof boot, plastic sheath and endotheca, the casing upper cover in be equipped with the inside hydro-cylinder assembly that has the plunger, casing lower cover in-connection have a ejector pin, and the lower tip of this ejector pin matches with the plunger in stretching into the hydro-cylinder assembly, the hydro-cylinder assembly on be equipped with the guide ring that supplies the ejector pin to stretch into, casing lower cover and casing upper cover sealing connection make its inside confined cavity that forms, be equipped with one end in this cavity and support and lean on the roof in the casing lower cover, the other end supports and leans on the return spring in casing upper cover diapire, this return spring cover is located on guide ring and the hydro-cylinder assembly, casing lower cover and casing upper cover between be equipped with the oil blanket that plays sealed effect.

In the hydraulic tensioner assembly, an elastic snap spring is arranged between the lower cover and the upper cover of the shell and on the upper part of the oil seal.

In the hydraulic tensioner assembly, the lower cover of the housing is provided with a limiting sleeve, and the lower end of the limiting sleeve is provided with a limiting abutting part which extends towards the lower cover of the housing and abuts against the oil seal.

In the hydraulic tensioner assembly, a snap spring is sleeved on the ejector rod and at the lower part of the limiting sleeve.

Compared with the prior art, the hydraulic tensioner assembly increases an oil seal compared with the traditional tensioner, improves good sealing performance and prevents oil leakage; the guide ring and the ejector rod are enhanced, the guide ring and the ejector rod are matched with each other to play a role in stable guiding, the structural stability is improved, and meanwhile, the problem that air is easily brought into a high-pressure cavity to form an idle stroke when a plunger in the existing tensioner goes upward is solved by the design of the guide ring and the ejector rod, so that the practicability is improved.

Drawings

Fig. 1 is a schematic sectional structural view of the hydraulic tensioner assembly.

In the figure, 1, a lower cover of a shell; 2. a housing upper cover; 3. a dust-proof sleeve; 4. a plastic sheath; 5. an inner sleeve; 6. an oil cylinder assembly; 7. a top rod; 8. a guide ring; 9. a cavity; 10. a return spring; 11. oil sealing; 12. an elastic clamp spring; 13. a limiting sleeve; 14. a limiting abutting part; 15. a clamp spring; 16. and a plunger.

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 hydraulic tensioner assembly includes a housing lower cover 1, a housing upper cover 2, a dust-proof sleeve 3, a plastic sleeve 4 and an inner sleeve 5, an oil cylinder assembly 6 with a plunger 16 inside is disposed in the housing upper cover 2, a push rod 7 is connected in the housing lower cover 1, a lower end of the push rod 7 extends into the oil cylinder assembly 6 to match with the plunger 16, a guide ring 8 for the push rod 7 to extend into is disposed on the oil cylinder assembly 6, the housing lower cover 1 and the housing upper cover 2 are hermetically connected to form a closed cavity 9 therein, a return spring 10 is disposed in the cavity 9, one end of the return spring abuts against an inner top wall of the housing lower cover 1, the other end of the return spring abuts against an inner bottom wall of the housing upper cover 2, the return spring 10 is sleeved on the guide ring 8 and the oil cylinder assembly 6, and an oil seal 11 having a sealing effect is disposed between the housing lower cover 1 and.

As a preferable structure, an elastic snap spring 12 is arranged between the lower shell cover 1 and the upper shell cover 2 and is positioned at the upper part of the oil seal 11.

In a preferred structure, a limiting sleeve 13 is arranged in the lower housing cover 1, and the lower end of the limiting sleeve 13 is provided with a limiting abutting part 14 which extends towards the lower housing cover 1 and abuts against the oil seal 11.

As the preferred structure, the ejector rod 7 is sleeved with a clamp spring 15 at the lower part of the limiting sleeve 13.

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

1. A hydraulic tensioner assembly is characterized by comprising a lower shell cover (1), an upper shell cover (2), a dustproof sleeve (3), a plastic sleeve (4) and an inner sleeve (5), wherein an oil cylinder assembly (6) with a plunger (16) inside is arranged in the upper shell cover (2), a push rod (7) is connected in the lower shell cover (1), the lower end part of the push rod (7) extends into the oil cylinder assembly (6) to be matched with the plunger (16), a guide ring (8) for the push rod (7) to extend into is arranged on the oil cylinder assembly (6), the lower shell cover (1) and the upper shell cover (2) are in sealing connection to form a closed cavity (9) inside, one end of the cavity (9) is abutted against the inner top wall of the lower shell cover (1), and the other end of the cavity is abutted against a return spring (10) on the inner bottom wall of the upper shell cover (2), the return spring (10) is sleeved on the guide ring (8) and the oil cylinder assembly (6), and an oil seal (11) with a sealing effect is arranged between the lower shell cover (1) and the upper shell cover (2).

2. The hydraulic tensioner assembly as claimed in claim 1, wherein an elastic snap spring (12) is arranged between the lower housing cover (1) and the upper housing cover (2) and above the oil seal (11).

3. The hydraulic tensioner assembly as claimed in claim 1, wherein a limiting sleeve (13) is arranged in the housing lower cover (1), and a limiting abutting portion (14) which extends towards the housing lower cover (1) and abuts against the oil seal (11) is arranged at the lower end of the limiting sleeve (13).

4. The hydraulic tensioner assembly as claimed in claim 3, wherein a snap spring (15) is sleeved on the top rod (7) and below the stop collar (13).