CN209943387U - Parking brake and loader - Google Patents
Parking brake and loader Download PDFInfo
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- CN209943387U CN209943387U CN201920755404.XU CN201920755404U CN209943387U CN 209943387 U CN209943387 U CN 209943387U CN 201920755404 U CN201920755404 U CN 201920755404U CN 209943387 U CN209943387 U CN 209943387U
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- brake
- piston
- parking brake
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- parking
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Abstract
The utility model discloses a parking brake and loader, including the brake axle, the braking off-axial cover is equipped with the casing, be equipped with mutually supporting braking piece and friction disc between brake axle and the casing, the braking piece coaxial arrangement is on the brake axle, the friction disc is installed on the casing, still overlap on the brake axle and be equipped with the piston, the piston is used for promoting the friction disc to press from both sides tight braking piece; the cavity is in matched transmission with the spring, the relative position of the piston and the piston shell is changed, the piston pushes the friction plate to clamp the brake plate or the piston compresses the spring to loosen the friction plate, and parking braking or service braking cancellation is further rapidly achieved.
Description
Technical Field
The utility model relates to a loading machine field, concretely relates to parking brake and loader.
Background
The parking brake is used for stabilizing the vehicle after the vehicle is stopped stably, so that accidents caused by vehicle sliding on a slope road surface are avoided, and the vehicle is braked and protected; in the field of engineering vehicles, due to the fact that the engineering vehicles are large in size and heavy in load capacity, particularly a loader is large in mass when high-density cargos such as sand and stone materials are carried, and therefore a brake is needed to provide larger braking force when parking and braking are conducted.
The inventors have found that although there are many types of parking brakes, they are not suitable for a loader: mechanically operated rocker-shoe (drum) parking brakes suffer from the following disadvantages: the structure size is large, and the maintenance is inconvenient; the open structure is not suitable for severe working environment; mechanical operation is inconvenient; the failure rate is high. In addition, the conventional mechanically operated hydraulic caliper disc parking brake also has the following disadvantages: the brake is installed in a biased mode, so that the occupied space is large and the installation is inconvenient; independent hydraulic brakes and need to be equipped with larger brake discs; the heat load is large, the brake fluid in the oil pipe or the oil duct is easy to be heated and gasified, and the oil leaks from the sealing part; the cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned technical problem, provide a parking brake and loader, to the great engineering vehicle of whole car quality such as loader very much, through a plurality of friction discs and the braking piece that mutually support and set up, improve the brake force, realize the stable braking to whole car.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a shell is sleeved outside the brake shaft, a brake piece and a friction piece which are matched with each other are arranged between the brake shaft and the shell, the brake piece is coaxially arranged on the brake shaft, the friction piece is arranged on the shell, a piston is further sleeved on the brake shaft and used for pushing the friction piece to clamp the brake piece tightly.
An output flange is arranged at one end of the brake shaft, the output flange is in butt joint with a shaft of the loader to be braked, and a brake disc is clamped through a friction plate to realize braking of the brake shaft.
Furthermore, the brake shaft is further sleeved with a piston shell and a rear cover, the piston shell is located between the rear cover and the shell, the piston and the piston shell are connected in a sliding mode, a cavity is formed in the matching position of the piston and the piston shell, and the cavity is used for pushing the piston to slide relative to the piston shell through changing the volume.
Furthermore, a spring is arranged between the piston and the rear cover and used for pushing the piston to slide along the piston shell.
Furthermore, two sealing rings are arranged on the matching surfaces of the piston and the piston shell and are respectively positioned on two sides of the cavity.
Still further, the device also comprises a channel, and the channel is communicated with the cavity.
Furthermore, the inner ring of the brake piece is connected with the brake shaft in a matching way through a spline, and the outer ring is provided with a plurality of annular dynamic friction plates which are arranged at a certain interval.
Furthermore, the outer ring of the friction plate is fixedly connected to the shell, the inner ring is provided with a plurality of annular static friction plates which are arranged at a certain interval, and an annular static friction plate is matched between every two adjacent static friction plates.
Furthermore, an oil seal is arranged on the brake shaft and used for isolating the brake plate and the friction plate from the outside.
Furthermore, a dust cover is arranged on one side of the oil seal, which is far away from the brake block.
The utility model also provides a loader installs foretell parking brake.
Compared with the prior art, the utility model, possess following beneficial technological effect:
(1) the piston is matched with the friction plate, so that the friction plate can clamp the brake piece in the axial direction, and braking is further realized, and compared with a traditional drum-type parking brake, the overall structural size is further reduced;
(2) through the arrangement of the cavity and the spring in matched transmission, the relative position of the piston and the piston shell is changed, the piston pushes the friction plate to clamp the brake plate or the piston to compress the spring so as to loosen the friction plate, and then parking brake or service brake cancellation is quickly realized;
(3) sealing rings are arranged on two sides of the cavity, so that the cavity is well sealed, the leakage of hydraulic oil is avoided during hydraulic transmission, the transmission is more stable, and the transmission controllability is improved;
(4) the channel is arranged to communicate the cavity with an external hydraulic source, the action of the piston is controlled in a hydraulic mode, the existing hydraulic system of the loader can be accessed, and the adaptability of the parking brake is improved;
(5) the multi-piece brake disc is matched with the multi-piece friction disc, so that the torque received by a single brake disc is dispersed, the braking effect is improved, and the diameter of the brake disc is reduced, so that the overall size of the brake is reduced, the heat productivity of the single brake disc is reduced, and the effect of protecting the brake disc is achieved;
(6) oil seals and dust covers are arranged on two sides of the brake sheets and the friction sheets to isolate an internal matching brake area, so that external sundries are prevented from entering the brake area, and the loader is more suitable for a construction site where a loader works;
(7) the shell, the piston shell and the rear cover are installed in a sectional mode, and are fixed with each other through the connecting bolts, so that the brake is more convenient to assemble, disassemble and maintain.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a schematic structural view of the present invention;
reference numerals: 1. the device comprises a shell, 2, a static friction plate, 3, a dynamic friction plate, 4, a piston shell, 5, a piston, 6, a screw, 7, a rear cover, 8, an oil seal, 9, a dust cover, 10, an output flange, 11, a spring, 12, a first sealing ring, 13 and a second sealing ring.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
For convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
The terms "mounted", "connected", "fixed", and the like in the present invention are to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.
As introduced in the background art, the open structure of the parking brake in the prior art is not suitable for the working environment of a loading vehicle, foreign matters are easy to enter the parking brake in a construction site, and the braking effect is influenced; and hydraulic tong disc parking brake installation is inconvenient, and the heat load is great, in order to solve above-mentioned technical problem, this application has proposed a parking brake and loader.
Example 1
In a typical embodiment of the present application, as shown in fig. 1, the parking brake includes a brake shaft, a housing 1, a static friction plate 2, a dynamic friction plate 3, a piston housing 4, a piston 5, a screw 6, a rear cover 7, an oil seal 8, a dust cover 9, a spring 11, a first seal ring 12 and a second seal ring 13, the housing, the piston housing and the rear cover are connected and fixed through the screw, and are integrally sleeved on the brake shaft, the static friction plate and the dynamic friction plate which are mutually matched are arranged between the housing and the brake shaft, the static friction plate is fixed on the housing, the dynamic friction plate is arranged on the brake shaft through a spline, the piston is arranged between the piston housing and the brake shaft, the piston and the piston housing are slidably connected, and form a cavity, the spring is arranged between the piston and the rear cover, and the intermittent extrusion of the static friction plate by the piston is realized through the volume change of the cavity and the combined, an oil seal is arranged between the shell and the brake shaft, and a dust cover is arranged on the outer side of the oil seal.
The cavity and the spring are arranged for matching transmission, the relative position of the piston and the piston shell is changed, the piston pushes the friction plate to clamp the brake plate or the piston compresses the spring to loosen the friction plate, and parking braking or service braking cancellation is further rapidly achieved.
Furthermore, the static friction plates and the dynamic friction plates are multiple, the static friction plates form friction plates, the dynamic friction plates form brake plates, the torque received by a single brake plate is dispersed through the matching of the friction plates and the brake plates, the braking effect is improved, the diameter of the brake plate is reduced, the integral size of the brake is reduced, the heating value of the single brake plate is reduced through the multi-plate brake plate, and the effect of protecting the brake plate is achieved.
The static friction plates and the dynamic friction plates are of annular structures, the outer circumferences of the static friction plates are fixed on the shell and are at a certain distance from each other, the dynamic friction plates are just positioned between two adjacent static friction plates, when the static friction plates are not subjected to external force, the dynamic friction plates are not in contact with the static friction plates, and when the external force extruded by the piston is received, the dynamic friction plates positioned in the gaps of the static friction plates are tightly held by the adjacent static friction plates, so that the rotation of the brake shaft is prevented.
Of course, it can be understood that, when the static friction plate is installed, the static friction plate can be integrally installed on the shell after a plurality of static friction plates are combined in sequence, or can be sequentially installed on the shell to finally form a friction plate structure; spacing blocks can be arranged between the adjacent static friction plates to ensure the relative spacing between the static friction plates and avoid the interference with the dynamic friction plates when external force is not received to cause noise; other fixing modes can also be adopted, such as the static friction plate is connected with the shell through the key teeth;
the inner rings of the dynamic friction plates are connected together and integrally installed on the brake shaft through the spline, compared with a flat key, the spline has better transmission performance, can provide more stable torque, and avoids the damage of a connecting key caused by overlarge torque of the brake shaft;
preferably, the static friction plate and the dynamic friction plate are both copper-based friction plates, and are lubricated in a soaking mode, so that maintenance is avoided, and the service life is prolonged.
Preferably, the piston is provided with a groove, one end of the spring is fixed in the groove, the other end of the spring is connected with the rear cover, and the length outside the spring groove is set according to the stroke required by the piston, so that the length of the whole piston in the axial direction is reduced;
an oil seal is arranged between the cover body and the brake shaft, the friction plate and the brake part are isolated from the outside air by the oil seal, and then larger dust is isolated by a dust cover outside the oil seal, so that the brake plate and the friction plate are well protected.
Furthermore, the sealing ring is made of rubber, the inner ring of the sealing ring is in close contact with the piston, and the outer ring of the sealing ring is in close contact with the piston shell, so that the isolation of the cavity area is realized, the sealing performance of the cavity area is ensured, and the controllability of hydraulic transmission is improved.
Example 2
In another embodiment of the present application, there is also provided a loader equipped with the parking brake described in embodiment 1.
Furthermore, a channel is further arranged on the shell of the parking brake, one end of the channel is communicated with the cavity, the other end of the channel is connected into a hydraulic system of the loader, and the parking brake is directly controlled by the hydraulic system of the loader to realize intermittent braking.
Furthermore, one end of the parking brake is provided with an output flange 10, the output flange is connected with a gearbox or a drive axle of the loader, and the brake protection of the whole loader is realized by limiting the rotation of a brake shaft.
The working principle is as follows: the parking brake is integrally spring-braked and hydraulically contacted to brake, the output flange is arranged on a shaft to be braked, the brake shaft is connected with the dynamic friction plate through a spline, the static friction plate is connected with the shell through a spline, the shell is fixed, and the piston is pushed by the spring to press the static friction plate, so that the static friction plate and the dynamic friction plate are clamped mutually to realize braking; when braking needs to be relieved, hydraulic oil enters the cavity from the channel through the driving of the hydraulic system, the volume of the cavity is enlarged, the piston is pushed to compress the spring, and the static friction plate and the dynamic friction plate return to a non-contact state to be in contact braking.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The parking brake is characterized by comprising a brake shaft, wherein a shell is sleeved outside the brake shaft, a brake piece and a friction piece which are matched with each other are arranged between the brake shaft and the shell, the brake piece is coaxially arranged on the brake shaft, the friction piece is arranged on the shell, a piston is further sleeved on the brake shaft and used for pushing the friction piece to clamp the brake piece.
2. The parking brake of claim 1, wherein the brake shaft further comprises a piston housing and a rear cover, the piston housing is disposed between the rear cover and the housing, the piston and the piston housing are slidably coupled, and a cavity is formed at a fitting position of the piston and the piston housing, and the cavity is used for pushing the piston to slide relative to the piston housing by changing volume.
3. Parking brake according to claim 2, characterized in that a spring is arranged between the piston and the rear cover for urging the piston to slide along the piston housing.
4. Parking brake according to claim 2, characterized in that the mating surfaces of the piston and the piston housing are provided with two sealing rings, one on each side of the cavity.
5. Parking brake according to claim 2, 3 or 4, further comprising a passage communicating with said cavity.
6. The parking brake of claim 1, wherein the brake pad has an inner ring coupled to the brake shaft by a spline and an outer ring having a plurality of annular dynamic friction plates arranged at a predetermined interval.
7. The parking brake of claim 6, wherein the outer race of said friction plate is fixedly connected to the housing, the inner race is provided with a plurality of annular static friction plates arranged at a spacing, and an annular static friction plate is fitted between adjacent static friction plates.
8. The parking brake of claim 1, wherein an oil seal is further provided on the brake shaft for isolating the brake pad and the friction plate from the outside.
9. The parking brake of claim 8, wherein a side of the oil seal remote from the brake pad is provided with a dust cover.
10. A loader, characterized in that a parking brake according to any one of claims 1-9 is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920755404.XU CN209943387U (en) | 2019-05-23 | 2019-05-23 | Parking brake and loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920755404.XU CN209943387U (en) | 2019-05-23 | 2019-05-23 | Parking brake and loader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209943387U true CN209943387U (en) | 2020-01-14 |
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ID=69133930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920755404.XU Active CN209943387U (en) | 2019-05-23 | 2019-05-23 | Parking brake and loader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209943387U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111409606A (en) * | 2020-04-13 | 2020-07-14 | 长沙凯瑞重工机械有限公司 | Driven axle braking system |
| CN117489726A (en) * | 2023-12-28 | 2024-02-02 | 杭叉集团股份有限公司 | Clutch and parking composite transfer case for forklift |
-
2019
- 2019-05-23 CN CN201920755404.XU patent/CN209943387U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111409606A (en) * | 2020-04-13 | 2020-07-14 | 长沙凯瑞重工机械有限公司 | Driven axle braking system |
| CN117489726A (en) * | 2023-12-28 | 2024-02-02 | 杭叉集团股份有限公司 | Clutch and parking composite transfer case for forklift |
| CN117489726B (en) * | 2023-12-28 | 2024-03-22 | 杭叉集团股份有限公司 | Clutch and parking composite transfer case for forklift |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Patentee after: Lovol Heavy Industry Group Co.,Ltd. Address before: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Patentee before: LOVOL Engineering Machinery Group Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |