A parking brake

Abstract

The utility model provides a parking brake, including the casing, be provided with the brake cavity in the casing, be provided with the oil hole for supplying hydraulic oil to enter or exit the brake cavity on the casing, be provided with the hollow baffle in the brake cavity, the one side of brake cavity corresponds baffle and is provided with the piston, one end of piston passes through the baffle and is fixed with the pressing plate, make the pressing plate be located the other side of baffle, the other end of piston is provided with the disc spring, the side away from baffle of pressing plate is provided with the friction plate of installing on transmission shaft, the left and right sides of casing correspond friction piece and are connected with the static piece of sliding. The utility model discloses the structure above, when parking brake, after the hydraulic oil in brake cavity is extracted by external equipment through oil hole, by the elastic force of disc spring, make piston drive pressing plate promote the direction of friction piece, and the friction piece is locked; on the contrary, inject hydraulic oil, can release the locked state of friction piece, and this structure is simple, small, safe and reliable, reduces the maintenance frequency.

Description

Technical Field

[0001] This utility model relates to the field of parking brake technology, and in particular to a parking brake. Background Technology

[0002] The parking brake, also known as the handbrake, is typically used to lock the drive shaft or rear wheels to prevent the vehicle from moving. It is usually used when the vehicle is stationary to prevent the vehicle from rolling away when starting or after parking, thus preventing parking accidents. Existing parking brakes on engineering vehicles have complex structures, occupy a large amount of space, and require frequent inspection and maintenance. Utility Model Content

[0003] This utility model discloses a parking brake, which mainly solves the problem that the parking brake of traditional engineering vehicles has a complex structure and occupies a large space.

[0004] To achieve the aforementioned objective, the technical solution of this utility model is implemented as follows:

[0005] This utility model provides a parking brake, including a housing, a brake chamber inside the housing, an oil hole for hydraulic oil to enter and exit the brake chamber, a hollow partition in the brake chamber, a piston on one side of the brake chamber corresponding to the partition, one end of the piston passing through the partition and fixed with a pressure plate, so that the pressure plate is located on the other side of the partition, a disc spring on the other end of the piston, a friction plate mounted on a drive shaft on the side of the pressure plate away from the partition, and stationary plates slidably connected to the left and right sides of the housing corresponding to the friction plate, so that the stationary plates are located on the side of the pressure plate away from the partition.

[0006] In one embodiment, the piston has a recessed positioning groove at one end corresponding to the disc spring, and one end of the disc spring is embedded in the positioning groove.

[0007] In one embodiment, the outer surface of the disc spring is supported within the housing, and the inner surface is supported on the piston.

[0008] In one embodiment, one end of the drive shaft is provided with teeth, and the friction plate is provided with grooves that mate with the teeth.

[0009] In one embodiment, the outer surface of the stationary plate is provided with a plurality of protruding sliders, and a groove is provided in the braking cavity corresponding to the position of the slider, and the slider is embedded in the groove.

[0010] In one embodiment, both the outer and inner surfaces of the partition are provided with sealing rings.

[0011] The advantages or beneficial effects of the above technical solution include at least the following: When applying the parking brake, hydraulic oil is extracted from the brake chamber through an oil hole by an external device. Under the force of the disc spring, the piston is pushed towards the friction pad, causing the piston to drive the pressure plate and push the adjacent stationary pad towards the friction pad, thereby locking the friction pad and realizing the parking brake operation. When releasing the friction pad, hydraulic oil is injected through an oil hole by an external device, allowing the hydraulic oil to enter between the partition and the piston, thereby pushing the piston away from the friction pad and squeezing the disc spring. This causes the piston to drive the pressure plate away from the stationary pad, thus releasing the locking state of the friction pad. The combination of the above structures makes the parking brake simple in structure, small in size, safe and reliable, and reduces the maintenance frequency. Attached Figure Description

[0012] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0013] Figure 1 A schematic diagram of the entire present invention is shown;

[0014] Figure 2 A cross-sectional schematic diagram of the entire present invention is shown;

[0015] Figure 3 A schematic diagram of the partition, piston, and pressure plate of this utility model is shown;

[0016] Figure 4 A schematic diagram of the housing of this utility model is shown.

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. Shell;

[0019] 11. Brake chamber; 12. Oil hole; 13. Slide groove;

[0020] 2. Partition;

[0021] 3. Piston;

[0022] 31. Positioning groove;

[0023] 4. Pressure plate;

[0024] 5. Disc spring;

[0025] 6. Drive shaft;

[0026] 61. Teeth;

[0027] 7. Friction plates;

[0028] 71. Glandular groove;

[0029] 8. Still film;

[0030] 81. Slider. Detailed Implementation

[0031] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0032] It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0034] It should be noted that the terms "a" and "a plurality of" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0035] The names of the messages or information exchanged between the multiple devices in this embodiment of the invention are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0036] See Figure 1 and Figure 2This utility model provides a parking brake, including a housing 1, a brake chamber 11 inside the housing 1, an oil hole 12 for supplying hydraulic oil to the brake chamber 11, a hollow partition 2 inside the brake chamber 11, a piston 3 on one side of the brake chamber 11 corresponding to the partition 2, one end of the piston 3 passing through the partition 2 and fixed with a pressure plate 4, so that the pressure plate 4 is located on the other side of the partition 2, a disc spring 5 on the other end of the piston 3, a friction plate 7 mounted on a drive shaft 6 on the side of the pressure plate 4 away from the partition 2, and stationary plates 8 slidably connected to the left and right sides of the housing 1 corresponding to the friction plate 7, so that the stationary plates 8 are located on the side of the pressure plate 4 away from the partition 2.

[0037] The housing 1 can be a rear housing and a front housing, which are connected by bolts to form the housing 1. A lubricating oil hole can be provided on the front housing to facilitate the addition of lubricating oil into the housing 1.

[0038] To prevent oil leakage from the outer and inner surfaces of the partition 2, sealing rings are provided on both the outer and inner surfaces of the partition 2.

[0039] The oil hole 12 is located between the piston 3 and the partition plate 2, and a concave annular groove is provided in the brake chamber 11 at the position corresponding to the oil hole 12, so that when the hydraulic oil enters the brake chamber 11, it can easily enter between the piston 3 and the partition plate 2.

[0040] The disc spring 5 can be a disc spring according to GBT1972-2005 to ensure that the elastic force of the disc spring 5 is sufficient to lock the friction plate 7 with the stationary plate 8 when pushing the piston 3.

[0041] A bearing is provided between the drive shaft 6 and the housing 1.

[0042] With the above structure, when applying the parking brake, hydraulic oil is drawn from the brake chamber 11 through the oil hole 12 by an external device. Under the elastic force of the disc spring 5, the piston 3 is pushed towards the friction plate 7, causing the piston 3 to drive the pressure plate 4 to push the adjacent stationary plate 8 towards the friction plate 7, thereby locking the friction plate 7 with the two stationary plates 8, thus realizing the parking brake operation. When releasing the friction plate 7, hydraulic oil is injected through the oil hole 12 by an external device, allowing the hydraulic oil to enter between the partition 2 and the piston 3, thereby pushing the piston 3 away from the friction plate 7 and squeezing the disc spring 5. This causes the piston 3 to drive the pressure plate 4 to disengage from the stationary plate 8, thus releasing the locking state of the friction plate 7. The combination of the above structure makes the parking brake simple in structure, small in size, safe and reliable, and reduces the maintenance frequency.

[0043] In one embodiment, see Figure 2 and Figure 3The piston 3 has a recessed positioning groove 31 at one end corresponding to the disc spring 5, and one end of the disc spring 5 is embedded in the positioning groove 31. In practical applications, the positioning groove 31 can prevent the disc spring 5 from shifting position and affecting the position of the elastic force.

[0044] The outer surface of the disc spring 5 is supported inside the housing 1, and the inner surface is supported on the piston 3.

[0045] In one embodiment, see Figure 4 One end of the drive shaft 6 is provided with teeth 61, and the friction plate 7 is provided with grooves 71 that mate with the teeth 61. In practical applications, the engagement of the teeth 61 and the grooves 71 allows the resistance to be transmitted to the drive shaft 6 when the friction plate 7 is locked.

[0046] The outer surface of the stationary plate 8 is provided with multiple protruding sliders 81, and the brake cavity 11 is provided with a groove 13 corresponding to the position of the sliders 81, with the sliders 81 embedded in the groove 13. In practical application, the movement direction of the stationary plate 8 can be restricted by the cooperation of the sliders 81 and the groove 13, and the rotation of the stationary plate 8 can also be restricted, so as to ensure the resistance between the stationary plate 8 and the friction plate 7.

[0047] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0048] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications can be made based on the above-described invention, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A parking brake, characterized in that, The device includes a housing, within which a braking chamber is provided. The housing has an oil hole for supplying hydraulic oil into and out of the braking chamber. A hollow partition is provided in the braking chamber. A piston is provided on one side of the braking chamber corresponding to the partition. One end of the piston passes through the partition and is fixed to a pressure plate, so that the pressure plate is located on the other side of the partition. A disc spring is provided on the other end of the piston. A friction plate mounted on a drive shaft is provided on the side of the pressure plate away from the partition. Stationary plates are slidably connected to the left and right sides of the housing corresponding to the friction plate, so that the stationary plates are located on the side of the pressure plate away from the partition.

2. The parking brake as described in claim 1, characterized in that, The piston has a recessed positioning groove at one end corresponding to the disc spring, and one end of the disc spring is embedded in the positioning groove.

3. The parking brake as described in claim 1 or 2, characterized in that, The outer surface of the disc spring is supported inside the housing, and the inner surface is supported on the piston.

4. The parking brake as described in claim 1, characterized in that, One end of the drive shaft is provided with teeth, and the friction plate is provided with grooves that mate with the teeth.

5. The parking brake as described in claim 1, characterized in that, The outer surface of the stationary plate is provided with multiple protruding sliders, and the brake cavity is provided with a groove corresponding to the position of the slider, and the slider is embedded in the groove.

6. The parking brake as described in claim 1, characterized in that, Both the outer and inner surfaces of the partition are provided with sealing rings.

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