CN212055587U - Wet type parking brake - Google Patents

Abstract

The utility model is suitable for a stopper technical field provides a wet-type parking brake, including circular end cover, circular end cover rigid coupling cylinder liner, cylinder liner inner wall and braking piston form the oil pocket, and the cylinder liner is equipped with the braking hydraulic fluid port with the oil pocket intercommunication, is equipped with in the cylinder liner to cup joint at a plurality of initiative pieces of braking epaxial, a plurality of driven pieces, braking piston and elastic element, and elastic element includes a plurality of butterfly spring elastic element. Therefore, the utility model discloses simple structure, the design is reliable, can improve the life of stopper, makes the stopper work more steady reliable.

Description

Wet type parking brake

Technical Field

The utility model relates to a stopper technical field especially relates to a wet-type parking brake.

Background

The principle of the wet brake used in the prior art is as follows: the spring pushes the brake piston to press the driving plate set and the driven plate set by releasing the brake oil pressure, the driving plate set is usually fixed on the brake shaft of the gearbox through an external spline, the driven plate set is fixed on the wet brake cylinder body through an internal spline, and the driving plate set and the driven plate set are arranged in parallel in a staggered way, under the pressing action of the brake piston, the driving plate and the driven plate lock the brake shaft to generate braking, when the braking needs to be relieved, the brake oil pressure overcomes the elastic force of the spring to push the brake piston to move away from the driving plate and the driven plate through injecting the brake oil pressure, the driving plate and the driven plate set are loosened, and the braking is relieved.

The patent with publication number CN206860715U discloses a durable type wet brake, including casing, cylinder liner, brake piston, a plurality of move friction disc and a plurality of static friction disc, the casing set firmly in the one end of cylinder liner, move the friction disc and locate on the brake shaft, the static friction disc is located on the inner wall of casing, durable type wet brake is still including setting firmly in the cylinder liner cylinder cap of keeping away from casing one end, brake piston slidable locates in the cylinder liner, brake piston forms an oil pocket cylinder cap with the inner wall of cylinder liner and is equipped with a plurality of elastic element between the brake piston, and elastic element is the spring, however, the phenomenon that the spring became invalid can appear in the middle of the process of using repeatedly, leads to the elasticity not enough to the dynamics that leads to the extrusion friction disc is not enough, and then leads to.

In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.

SUMMERY OF THE UTILITY MODEL

To foretell defect, the utility model aims to provide a wet-type parking brake, its simple structure, the design is reliable, can improve the life of stopper, makes the stopper work more steady reliable.

In order to realize the above-mentioned purpose, the utility model provides a wet-type parking brake, including circular end cover, circular end cover rigid coupling cylinder liner, the cylinder liner inner wall forms the oil pocket with the braking piston, the cylinder liner be equipped with the braking hydraulic fluid port of oil pocket intercommunication, be equipped with in the cylinder liner and cup joint at a plurality of initiative pieces of braking epaxial, a plurality of driven pieces, braking piston and elastic element, elastic element includes a plurality of butterfly spring.

According to the utility model discloses a wet-type parking brake, the thickness of butterfly-shaped spring is 4 ~ 8 mm.

According to the utility model discloses a wet-type parking brake, the quantity of butterfly spring is 4.

According to the utility model discloses a wet-type parking brake, butterfly spring integrated mode is for closing integrated mode or coincide integrated mode or compound integrated mode.

According to the utility model discloses a wet-type parking brake, butterfly spring integrated mode is for closing the integrated mode.

According to the utility model discloses a wet-type parking brake, the cylinder liner includes that first sliding hole and second slide the hole, the aperture in first sliding hole is greater than the aperture in second sliding hole, the braking hydraulic fluid port is located on the first sliding hole, the second sliding hole is equipped with lubricated hydraulic fluid port.

According to the utility model discloses a wet-type parking brake, the brake axle includes the primary shaft, secondary shaft and third axle, the diameter of secondary shaft is greater than the primary shaft with the diameter of third axle, just the one end of secondary shaft is cup jointed through the second bearing activity the cylinder liner, the other end of secondary shaft is cup jointed through the first bearing activity circular end cover.

According to the utility model discloses a wet parking brake, be equipped with filter assembly on the braking hydraulic fluid port, filter assembly includes first connecting pipe and the filter screen of locating in the braking hydraulic fluid port; the diameter of the first connecting pipe corresponds to that of the braking oil port; and one end of the first connecting pipe, which is far away from the oil cavity, is connected with a hydraulic system of the vehicle through a second connecting pipe.

According to the utility model discloses a wet-type parking brake, a mounting groove has been seted up on the surface of cylinder liner, the braking hydraulic fluid port is seted up in the bottom of mounting groove, filtering component still locates including the ring the mounting panel at first connecting pipe middle part, mounting panel detachable set firmly in the bottom of mounting groove.

According to the utility model discloses a wet-type parking brake, the mesh number of filter screen is 100 ~ 270 meshes.

The utility model aims to provide a wet parking brake, which can improve the elasticity and the service life of an elastic element by arranging a butterfly spring, thereby improving the service life of the brake; by arranging the second shaft, guidance can be provided for the brake piston and the butterfly spring, so that the active driven piece is stressed uniformly; through setting up filtering component, can effectively filter the impurity in the hydraulic oil. The utility model has the advantages that: simple structure, the design is reliable, can improve the life of stopper, makes the stopper work more steady reliable.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a belleville spring configuration;

FIG. 3 is a schematic view of a filter assembly construction;

FIG. 4 is a schematic illustration of a cylinder liner configuration;

FIG. 5 is a schematic illustration of a brake piston configuration;

FIG. 6 is a schematic view of an internal spline configuration;

FIG. 7 is a schematic view of an external spline configuration;

in the figure: 11-an internal spline, 2-a cylinder sleeve, 21-an oil cavity, 22-a first sliding hole, 23-a second sliding hole, 24-a lubricating oil port and 25-an end face; 3-brake piston, 31-first sliding shaft, 32-second sliding shaft; 4-sealing ring, 5-elastic element, 61-circular end cover, 62-first bearing, 63-second bearing; 7-a brake oil port, 71-a filter assembly, 711-a first connecting pipe, 712-a filter screen, 713-a mounting plate, 72-a second connecting pipe, 73-a second connecting plate, 74-a mounting groove, 75-a first oil seal and 76-a second oil seal; 8-brake shaft, 81-external spline, 82-second shaft, 83-third shaft, 84-first shaft, 85-collar; 91-driving plate, 92-driven plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1, the utility model provides a wet-type parking brake, including circular end cover 61, circular end cover 61 rigid coupling cylinder liner 2 is equipped with braking hydraulic fluid port 7 and lubricated hydraulic fluid port 24 on the cylinder liner 2, is equipped with filter assembly 71 on the braking hydraulic fluid port 7, and cylinder liner 2, a plurality of driving plate 91 and a plurality of driven plate 92 are cup jointed in proper order to brake axle 8, braking piston 3, elastic element 5, circular end cover 61.

The middle position of the circular end cover 61 is provided with a through hole, one side of the through hole close to the cylinder sleeve 2 is provided with a bearing hole, a first bearing 62 is placed in the bearing hole, the circular end cover 61 is evenly provided with a plurality of through bolt holes along the circumferential direction, and the bolt holes are used for being connected with the cylinder sleeve 2.

Referring to fig. 4, the cylinder liner 2 is stepped and has a hollow structure. The hollow structure of the cylinder sleeve 2 comprises a first sliding hole 22 and a second sliding hole 23, the aperture of the first sliding hole 22 is larger than that of the second sliding hole 23 so as to form a step part, the first sliding hole 22 of the cylinder sleeve 2 is provided with a brake oil port 7, and the second sliding hole 23 is provided with a lubricating oil port 24. One end, far away from second sliding hole 23, of first sliding hole 22 of cylinder liner 2 is provided with a bolt hole connected with circular end cover 61, one end, far away from first sliding hole 22, of second sliding hole 23 of cylinder liner 2 is provided with end face 25, end face 25 is provided with a through hole, one side, close to cylinder liner 2, of the through hole is provided with a bearing hole, and second bearing 63 is placed in the bearing hole.

The brake shaft 8 comprises a first shaft 84, a second shaft 82 and a third shaft 83 which are integrally formed, the diameter of the second shaft 82 is larger than that of the first shaft 84 and that of the third shaft 83, two ends of the second shaft 82 are movably sleeved with the circular end cover 61 and the cylinder sleeve 2 through the first bearing 62 and the second bearing 63 respectively, a collar 85 is arranged at one end, far away from the first shaft 84, of the second bearing 63, and the collar 85 plays a role in limiting the position of the second bearing 63 and ensures safe and stable operation of the second bearing 63. The second shaft 82 can provide a guide for the movement of the elastic element 5 and the brake piston 3, so that the elastic element 5 pushes the brake piston 3 to move along the axis, thereby applying uniform load to the main and auxiliary brake pads sleeved on the brake shaft 8, and ensuring that the brake can work more safely and stably.

The elastic element 5 is sleeved on the second shaft 82 in a sliding manner and is located in the first sliding hole 22 of the cylinder sleeve 2, and the elastic element 5 can push the brake piston 3 to enable the brake piston 3 to press the driving plate 91 and the driven plate 92.

Referring to fig. 2, the elastic elements 5 are a plurality of disc springs, the disc springs are special springs which are tapered in the axial direction and bear load, and compared with common springs, the disc springs have the advantages of large rigidity, large deformation energy per unit volume, good buffering and shock absorbing capacity, easy maintenance and replacement of the disc springs, high economic safety and long service life. Furthermore, the butterfly springs adopt different combination modes, so that the characteristics of the springs can be changed in a large range, the combination modes of the butterfly springs comprise a superposition combination mode, a involutory combination mode and a composite combination mode, and a person skilled in the art can select the proper quantity and combination mode of the butterfly springs according to needs, preferably, the utility model selects four butterfly springs which are combined in the involutory mode; because the size of the inner diameter and the outer diameter of the butterfly spring can be changed when the butterfly spring is stressed and deformed, the diameter b of the butterfly spring is smaller than the inner diameter a of the cylinder sleeve 2, and a sufficient space is provided for deformation of the butterfly spring when the butterfly spring is stressed.

The thickness t of the butterfly spring is 4-8 mm, and the range can ensure that the butterfly spring provides enough elasticity.

Referring to fig. 5, the brake piston 3 is sleeved on the second shaft 82 and located in the cylinder liner 2, and can slide along the inner wall of the cylinder liner 2, and the brake piston 3 and the inner wall of the cylinder liner 2 form an oil chamber 21. The brake piston 3 is a hollow T-shaped structure, the brake piston 3 includes a first sliding shaft 31 and a second sliding shaft 32, the first sliding shaft 31 is slidably disposed in the first sliding hole 22, the second sliding shaft 32 is slidably disposed in the second sliding hole 23, the oil chamber 21 is located between the step portion and the first sliding shaft 31, and the brake oil port 7 is communicated with the oil chamber 21.

Further, sealing rings 4 are respectively arranged between the first sliding shaft 31 and the side wall of the first sliding hole 22 and between the second sliding shaft 32 and the side wall of the second sliding hole 23, so as to prevent the hydraulic oil in the oil chamber 21 from leaking.

Referring to fig. 6 and 7, the inner wall of the second sliding hole 23 of the cylinder liner 2 is provided with an internal spline 11, and the second shaft 82 is provided with an external spline 81 at a position corresponding to the internal spline 11. The driving pieces 91 are fixedly arranged on the brake shaft 8 through the external splines 81 and can rotate along with the brake shaft 8. And the driven plates 92 are fixedly arranged on the inner wall of the cylinder sleeve 2 through the internal spline 11. The driving plates 91 and the driven plates 92 are arranged in parallel in a staggered way, and when the brake is not pressed, a gap exists between the driving plates 91 and the driven plates 92, so that the brake shaft 8 can rotate freely.

Referring to fig. 3, the filter assembly 71 is used to filter impurities in the hydraulic oil. The filter assembly 71 includes a first connection pipe 711, a filter net 712, and a mounting plate 713. The diameter of the first connection pipe 711 corresponds to the diameter of the brake oil port 7, the first connection pipe 711 is disposed in the brake oil port 7, and a first oil seal 75 is disposed between the first connection pipe 711 and the inner wall of the brake oil port 7, and the first oil seal 75 is used for preventing oil leakage. The filter 712 is fixedly arranged at a port at one end of the first connecting pipe 711, impurities in the hydraulic oil can be filtered out, the filter 712 is semi-elliptical, an opening of the filter 712 faces away from the oil cavity 7, the filtering area is increased, and the filter is ensured not to block the circulation of the hydraulic oil while filtering. An installation groove 74 is formed in the outer surface of the cylinder liner 2, the brake oil port 7 is formed in the bottom of the installation groove 74, the installation plate 713 is annularly arranged around the first connection pipe 711, and the installation plate 713 is arranged inside the installation groove 74.

The mesh number of the filter screen is 100-270 meshes, and the corresponding mesh diameter is 0.15-0.053 mm according to the mesh number of the commonly used filter screen in China. When the mesh number is less than 100, the mesh diameter of the filter net 712 is too large, and the foreign matters can not be effectively prevented; when the mesh number is larger than 270, the mesh diameter of the filter net 712 is too small, which has a certain influence on the passing of the hydraulic oil. The number of the filter meshes can be selected by the person skilled in the art according to the requirement.

Furthermore, one end of the first connecting pipe 711, which is far away from the oil chamber 21, is connected with a hydraulic system of the vehicle through a second connecting pipe 72, the second connecting pipe 72 is sleeved inside the first connecting pipe 711, and a second oil seal 76 is arranged in a sleeved area of the second connecting pipe 72 and the first connecting pipe 711, so that oil tightness is realized. The end of the second connection pipe 72 connected to the first connection pipe 711 is provided with a second connection plate 73, the oil passage of the second connection pipe 72 penetrates through the second connection plate 73, the second connection plate 73 is stacked under the mounting plate 713, and the second connection plate 73 and the mounting plate 713 are fixedly arranged at the bottom of the mounting groove 74 through a plurality of screws.

It needs to be appointed that second connecting plate 73 is more convenient and fast with hydraulic system and brake oil chamber intercommunication to second connecting plate 73 and mounting panel 713 are convenient for the dismouting, and when the impurity on filter screen 72 was too much, can dismantle connecting plate 73 and mounting panel 713, and then take out first connecting pipe 711 from braking hydraulic fluid port 7, then can wash filter screen 712.

The working principle of the utility model is as follows:

when the vehicle is in a driving state: a certain amount of hydraulic oil (provided by a hydraulic system) is injected into the oil cavity 21 through the brake oil port 7, the hydraulic oil overcomes the elastic force of the elastic element 5 to push the brake piston 3 to be away from the driving plate and the driven plate, the driving plate and the driven plate are not extruded any more, so that a gap exists between the driving plate 91 and the driven plate 92, the brake shaft 8 can rotate freely, and the vehicle runs normally.

When the vehicle is in a service braking state: in a driving state, the hydraulic system is operated to enable hydraulic oil in the oil cavity 21 to flow back to the hydraulic system, the braking piston 3 moves to squeeze the driving piece 91 and the driven piece 92 under the squeezing action of the elastic element 5, the driving piece 91 and the driven piece 92 are locked mutually under the squeezing action, the braking shaft 8 cannot rotate, and the vehicle is braked.

In summary, the butterfly spring is arranged, so that the elasticity and the service life of the elastic element can be improved, and the service life of the brake can be further prolonged; by arranging the second shaft, guidance can be provided for the brake piston and the butterfly spring, so that the active driven piece is stressed uniformly; through setting up filtering component, can effectively filter the impurity in the hydraulic oil. The utility model has the advantages that: simple structure, the design is reliable, can improve the life of stopper, makes the stopper work more steady reliable.

Naturally, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and it is intended that all such changes and modifications be considered as within the scope of the appended claims.

Claims (10)

1. The wet parking brake is characterized by comprising a circular end cover, wherein the circular end cover is fixedly connected with a cylinder sleeve, an oil cavity is formed between the inner wall of the cylinder sleeve and a brake piston, the cylinder sleeve is provided with a brake oil port communicated with the oil cavity, a plurality of driving sheets and a plurality of driven sheets which are sleeved on a brake shaft are arranged in the cylinder sleeve, the brake piston and an elastic element are arranged, and the elastic element comprises a plurality of butterfly springs.

2. The wet parking brake of claim 1, wherein the disc spring has a thickness of 4-8 mm.

3. The wet parking brake of claim 2, wherein the number of disc springs is 4.

4. The wet parking brake of claim 3, wherein the disc spring combination is a butt combination or a lap combination or a compound combination.

5. The wet parking brake of claim 4, wherein the disc spring combination is a involution combination.

6. The wet parking brake of claim 5, wherein the cylinder sleeve comprises a first sliding hole and a second sliding hole, the first sliding hole has a larger bore diameter than the second sliding hole, the brake oil port is located on the first sliding hole, and the second sliding hole is provided with a lubrication oil port.

7. The wet parking brake of claim 6, wherein the brake shaft comprises a first shaft, a second shaft and a third shaft, the diameter of the second shaft is larger than the diameter of the first shaft and the diameter of the third shaft, one end of the second shaft is movably sleeved with the cylinder sleeve through a second bearing, and the other end of the second shaft is movably sleeved with the circular end cover through a first bearing.

8. The wet parking brake of claim 7, wherein a filter assembly is arranged on the brake oil port, and the filter assembly comprises a first connecting pipe and a filter screen which are arranged in the brake oil port; the diameter of the first connecting pipe corresponds to that of the braking oil port; and one end of the first connecting pipe, which is far away from the oil cavity, is connected with a hydraulic system of the vehicle through a second connecting pipe.

9. The wet parking brake of claim 8, wherein an installation groove is formed in an outer surface of the cylinder sleeve, the brake oil port is formed in the bottom of the installation groove, the filter assembly further comprises an installation plate annularly arranged in the middle of the first connection pipe, and the installation plate is detachably and fixedly arranged at the bottom of the installation groove.

10. The wet parking brake of claim 9, wherein the mesh number of the filter screen is 100 to 270 mesh.

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