CN213064412U

CN213064412U - Safety reverse hydraulic brake

Info

Publication number: CN213064412U
Application number: CN202021929127.9U
Authority: CN
Inventors: 徐君鹏; 蒋祖光
Original assignee: Zhejiang Wins Machinery Co ltd
Current assignee: Zhejiang Wins Machinery Co ltd
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2021-04-27
Anticipated expiration: 2030-09-07

Abstract

The utility model provides a reverse hydraulic brake of safe type belongs to braking equipment technical field. It is convenient inadequately that it has solved current stopper overall assembly structure, and the dead problem of spring return card. This reverse hydraulic brake of safe type, which comprises a housin, the slider, the plunger, brake spring, installation shell fragment and friction disc, the plunger is worn to locate the casing center and mutual clearance fit, the rear end of casing is fixed with the guide pillar, the inside swivel nut that has linked firmly of plunger, the swivel nut cover is located on the guide pillar, its both ends lean on with shells inner wall and plunger front end respectively on the brake spring cover is located the plunger, brake spring is in compression state, installation shell fragment card is established and is fixed in the casing front end and leans on with the plunger tip counterbalance, the rear end of casing is the hydraulic pressure chamber, the slider is fixed with the plunger rear end, be provided with the oiling mouth that is linked together with the hydraulic pressure chamber on the. The utility model has the advantages of the equipment makes things convenient for the plunger activity more smooth and easy.

Description

Safety reverse hydraulic brake

Technical Field

The utility model belongs to the technical field of the braking equipment, a stopper is related to, in particular to reverse hydraulic brake of safe type.

Background

A brake is a device having a function of decelerating, stopping, or maintaining a stopped state of a moving member, and is a mechanical part that stops or decelerates a moving member in a machine, and is commonly called a brake. The principle of a conventional hydraulic brake is that a brake spring plate is in a contraction state generally, the brake spring plate is enabled to expand a friction disc to be in contact with a brake disc through hydraulic pressure to realize braking, but the application of the structure on a lifting mechanism has many disadvantages, for example, a certain potential safety hazard exists because the brake effect cannot be achieved after hydraulic failure, so that the brake applied to the lifting mechanism at present generally adopts reverse braking, namely, the friction disc is in the expansion state conventionally, the spring plate is enabled to contract through the hydraulic pressure continuously injected into the hydraulic pressure larger than an elastic part, when equipment fails, a spring expands the friction disc to realize braking, the structure has better safety through pure mechanical braking, but the braking mode also has the problems that the whole assembly structure is not convenient enough and the spring is reset and blocked.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, a reverse hydraulic brake of safe type that the equipment makes things convenient for the plunger activity more smooth and easy is provided.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a reverse hydraulic brake of safe type, includes casing, slider, plunger, brake spring, installation shell fragment and friction disc, its characterized in that, the plunger wear to locate the casing center and mutual clearance fit, the rear end of casing is fixed with the guide pillar, the plunger inside link firmly the swivel nut, the swivel nut cover locate on the guide pillar, the brake spring cover locate on the plunger its both ends respectively with the shells inner wall with the plunger front end support against, brake spring be in compression state, installation shell fragment card establish be fixed in the casing front end and with the plunger tip support against, the rear end of casing is the hydraulic pressure chamber, slider and plunger rear end fixed, the casing on be provided with the oiling mouth that is linked together with the hydraulic pressure chamber.

The principle of the safety reverse hydraulic brake is as follows: when elevating system is in normal operating condition, pour into hydraulic oil into toward the hydraulic chamber of casing through the hydraulic pump, the hydraulic pressure that forms this moment is greater than brake spring's elasticity, the plunger passes through the slider and moves backward, brake spring is further compressed, the installation shell fragment resets and makes the friction disc separate with the brake disc on the elevating system, when elevating system stops or scram, hydraulic pressure force disappears this moment, brake spring in compression state will touch and make the installation shell fragment open, the elasticity through brake spring makes the friction disc support with the brake disc on the elevating system and compress tightly and form effective braking.

In the safety reverse hydraulic brake, the screw sleeve and the plunger are fixed in a threaded fit manner.

In the safety reverse hydraulic brake, the rear end of the shell is fixedly connected with the positioning block, and the rear end of the plunger penetrates through the center of the positioning block.

In the safety reverse hydraulic brake, the rear end of the shell is also provided with a pressure release valve communicated with the hydraulic cavity.

In the safety reverse hydraulic brake, the contact surfaces among the shell, the sliding block and the plunger are sealed by the sealing rings.

In the safety reverse hydraulic brake, the guide post is fixedly connected with a positioning plate at the rear end of the shell, and the positioning plate is fixed through an end cover outside the shell.

In the safety reverse hydraulic brake, the shell is provided with an annular step structure, the end cover is provided with a bending structure matched with the step structure, and the end cover is clamped into the step structure to be fixed with each other.

In the safety reverse hydraulic brake, the number of the friction plates is two, and the two friction plates are respectively fixed on the installation elastic plate and the shell to form positions corresponding to each other.

Compared with the prior art, this reverse hydraulic brake of safe type well plunger fixes a position through casing cooperation locating piece earlier, and the inside swivel nut of rethread plunger realizes further fixing a position with the guide pillar cooperation, and its axial activity of consequently less axial offset of plunger is more smooth and easy difficult skew card dies, and the security performance of stopper is better.

Drawings

FIG. 1 is a first cross-sectional view of the brake;

FIG. 2 is a second cross-sectional view of the brake;

in the figure, 1, a housing; 2. a slider; 3. a plunger; 4. a brake spring; 5. installing an elastic sheet; 6. a friction plate; 7. a guide post; 8. a threaded sleeve; 9. a hydraulic chamber; 10. an oil filling port; 11. positioning blocks; 12. a pressure relief valve; 13. positioning a plate; 14. an end cap; 15. a step structure; 16. and (5) a bending structure.

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 and 2, the safety reverse hydraulic brake comprises a housing 1, a slider 2, a plunger 3, a brake spring 4, an installation elastic sheet 5 and a friction sheet 6, wherein the plunger 3 penetrates through the center of the housing 1 and is in clearance fit with the center of the housing, a guide pillar 7 is fixed at the rear end of the housing 1, a threaded sleeve 8 is fixedly connected inside the plunger 3, the threaded sleeve 8 is sleeved on the guide pillar 7, the brake spring 4 is sleeved on the plunger 3, two ends of the brake spring are respectively abutted against the inner wall of the housing 1 and the front end of the plunger 3, the brake spring 4 is in a compressed state, the installation elastic sheet 5 is clamped and fixed at the front end of the housing 1 and abutted against the end of the plunger 3, the rear end of the housing 1 is a hydraulic cavity 9, the slider 2 is fixed at the rear end of the plunger 3.

Further, the screw sleeve 8 is fixed with the plunger 3 through screw thread matching, and the screw sleeve 8 is positioned in the plunger 3 and can be assembled more conveniently through matching of the internal screw threads.

The rear end of the shell 1 is fixedly connected with the positioning block 11, the rear end of the plunger 3 penetrates through the center of the positioning block 11, the plunger 3 can be effectively prevented from deviating through the design of the positioning block 11, and the axial translation effect is better.

The rear end of the shell 1 is also provided with a pressure release valve 12 communicated with the hydraulic cavity 9, and the pressure release valve 12 is used for enabling oil liquid in the hydraulic cavity 9 to flow out more quickly when hydraulic pressure disappears.

In order to prevent the hydraulic oil from overflowing from the contact gap inside the hydraulic cavity 9, the contact surfaces among the shell 1, the sliding block 2 and the plunger 3 are all sealed by sealing rings.

Guide pillar 7 links firmly with 1 rear end locating plate 13 of casing, and locating plate 13 is fixed through 1 outside end cover 14 of casing, has seted up annular stair structure 15 on the casing 1, has on the end cover 14 with this stair structure 15 matched with bent structure 16, and end cover 14 forms reciprocal anchorage through going into bent structure 16 card in stair structure 15, and the design of this structure can make holistic assembly more convenient.

The number of the friction plates 6 is two, the two friction plates are respectively fixed on the installation elastic sheet 5 and the shell 1 to form positions corresponding to each other, and the brake disc is clamped tightly through the two friction plates 6 during braking.

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.

Although various terms are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. A safety reverse hydraulic brake comprises a shell (1), a sliding block (2), a plunger (3), a brake spring (4), an installation elastic sheet (5) and a friction sheet (6), and is characterized in that the plunger (3) penetrates through the center of the shell (1) and is in clearance fit with the center of the shell, a guide pillar (7) is fixed at the rear end of the shell (1), a threaded sleeve (8) is fixedly connected inside the plunger (3), the threaded sleeve (8) is sleeved on the guide pillar (7), the brake spring (4) is sleeved on the plunger (3), two ends of the brake spring are respectively abutted against the inner wall of the shell (1) and the front end of the plunger (3), the brake spring (4) is in a compression state, the installation elastic sheet (5) is clamped and fixed at the front end of the shell (1) and abutted against the end of the plunger (3), the rear end of the shell (1) is a hydraulic cavity (9), the sliding block (2) is fixed with the rear end of the plunger (3), and the shell (1) is provided with an oil injection port (10) communicated with the hydraulic cavity (9).

2. The safety reverse hydraulic brake as claimed in claim 1, wherein the threaded sleeve (8) is fixed to the plunger (3) by a screw fit.

3. The safety type reverse hydraulic brake as claimed in claim 1, wherein a positioning block (11) is fixedly connected to the rear end of the housing (1), and the rear end of the plunger (3) is inserted through the center of the positioning block (11).

4. A safety-type reverse hydraulic brake according to claim 1, characterized in that the rear end of the housing (1) is further provided with a pressure relief valve (12) communicating with the hydraulic chamber (9).

5. The safety type reverse hydraulic brake of claim 1, wherein the contact surfaces of the housing (1), the sliding block (2) and the plunger (3) are sealed by sealing rings.

6. The safety type reverse hydraulic brake as claimed in claim 1, characterized in that the guide post (7) is fixedly connected with a positioning plate (13) at the rear end of the housing (1), and the positioning plate (13) is fixed by an end cover (14) outside the housing (1).

7. The safety type reverse hydraulic brake as claimed in claim 6, wherein the housing (1) is provided with an annular step structure (15), the end cap (14) is provided with a bending structure (16) matched with the step structure (15), and the end caps (14) are fixed to each other by clamping the bending structure (16) into the step structure (15).

8. The safety type reverse hydraulic brake as claimed in claim 1, wherein the number of the friction plates (6) is two, and the friction plates are respectively fixed on the mounting elastic sheet (5) and the housing (1) to form positions corresponding to each other.