A hub integrated hydraulic brake device

Abstract

The application discloses a wheel hub integrated hydraulic brake device and relates to the technical field of aircrafts. The wheel hub integrated hydraulic brake device specifically comprises a wheel hub and a brake structure. The outer ring of the wheel hub is provided with an air tire. The brake structure comprises a center shaft connected with the center of the wheel hub, a steel brake disc connected with the middle part of the center shaft, a hydraulic disc movably sleeved with the other end of the center shaft, a brake pad fixedly connected with the side of the hydraulic disc close to the steel brake disc, and an integrated hydraulic cylinder fixedly connected with the other end of the hydraulic disc. The wheel hub integrated hydraulic brake device does not have a hydraulic cylinder specially used for braking, thereby reducing the production difficulty of the brake device. The setting of the fixing protrusion enables the parts of the wheel hub to bear the integrated hydraulic cylinder, thereby reducing the pressure of the hydraulic cylinder on the wheel hub. When the wheel hub rotates, the position of the integrated hydraulic cylinder remains unchanged, the hydraulic cylinder is convenient to inject hydraulic oil and ventilate, the aircraft architecture is simpler, the weight is lighter, and the reliability is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft, and in particular to a wheel hub integrated hydraulic brake device. Background Art

[0002] The aircraft braking system is an important device to ensure the safety of the aircraft. It is mainly used to dissipate the kinetic energy of the aircraft when it is taxiing on the ground, ensure that the aircraft is braked to a stop, shorten the aircraft's taxiing distance, prevent excessive wear of the wheels, and can cooperate with other onboard systems to realize the aircraft's turning and parking functions. It is an important device to ensure the safe takeoff and landing of the aircraft.

[0003] At present, some patents for improving aircraft braking devices have been disclosed in the prior art, such as the authorized patent with application number CN202222080639.8, which proposes a cam brake mechanism, including a relatively arranged rotary servo and a brake pump, the rotary servo is connected to and drives a cam to rotate, the cam is raised to set a stop position, and the brake pump extends toward the rotary servo to set a push rod for starting / stopping the brake pump, and the push rod rolls and contacts the cam; when the rotary servo rotates the cam, the push rod is pushed up at the stop position, and the push rod starts the brake pump.

[0004] When the above scheme is in use, the rotary servo and the brake pump need to be used in conjunction, and the brake pump and the rotary servo are arranged opposite to each other, which causes the above scheme to occupy a larger lateral space; when the above scheme is in use, the brake device cannot directly brake the wheel hub of the aircraft, and friction will be generated between the cam and the push rod, affecting the corresponding accuracy of the brake pump, and thus affecting the braking effect. Based on this, the present application proposes a wheel hub integrated hydraulic brake device. Summary of the Invention

[0005] The present invention provides a hub-integrated hydraulic brake device, which solves the problems proposed in the above background technology, such as complex structure, large space occupation, inability to directly perform braking operation, and the impact on braking effect as the use time increases.

[0006] The present invention provides the following technical solution: a wheel hub integrated hydraulic brake device, comprising a brake disc that rotates with the wheel hub, a hydraulic cylinder fixed to a part that fixes the wheel hub, and a brake pad fixedly connected to the hydraulic cylinder. Under the action of the hydraulic cylinder, the position of the brake pad moves, and when the brake pad is tightly fitted with the brake disc, the braking function is realized; there is no dedicated hydraulic cylinder, the structure is simple, and the weight is light.

[0007] A wheel hub integrated hydraulic brake device includes a wheel hub and a brake structure, wherein the outer ring of the wheel hub is mounted with an inflatable tire, and the brake structure includes a central shaft connected to the center of the wheel hub, a steel brake disc connected to the middle of the central shaft, a hydraulic disc movably sleeved on the other end of the central shaft, a brake pad fixedly connected to the side of the hydraulic disc close to the steel brake disc, and an integrated hydraulic cylinder fixedly connected to the other end of the hydraulic disc, wherein the integrated hydraulic cylinder is movably connected to the other end of the central shaft.

[0008] Preferably, the pneumatic tire comprises an inner tube, an outer tube and a pneumatic tire valve.

[0009] Preferably, the wheel hub comprises a rotating wheel hub outer portion and a rotating wheel hub inner portion fixedly connected to the rotating wheel hub outer portion, and the rotating wheel hub inner portion is located on a side of the rotating wheel hub outer portion close to the steel brake disc.

[0010] Preferably, the outer rings at both ends of the central shaft are connected to ball bearings, the outer portion of the rotating hub is connected to the central shaft via a ball bearing, and the steel brake disc is connected to the central shaft via another ball bearing.

[0011] Preferably, a gasket is provided on the outside of the integrated hydraulic cylinder, and the gasket is movably connected to the central shaft. The outer rings at both ends of the central shaft are threaded with nuts, one of the nuts is in contact with the integrated hydraulic cylinder through the gasket, and the other nut is in contact with the outer side of the ball bearing connected to the rotating wheel hub.

[0012] Preferably, the nut is a slotted nut.

[0013] Preferably, oil seals are provided on both the inner and outer sides of the hydraulic disc, the hydraulic disc is connected to the integrated hydraulic cylinder via the oil seals, and the space between the two oil seals is filled with hydraulic brake oil.

[0014] Preferably, both ends of the integrated hydraulic cylinder on the side away from the hydraulic disc are fixedly connected with fixed protrusions, a hydraulic oil inlet is provided in the middle of one of the fixed protrusions, and an air vent is provided in the middle of the other fixed protrusion.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The wheel hub integrated hydraulic brake device does not have a hydraulic cylinder dedicated to the brake, which reduces the difficulty of producing the brake device. Through the setting of the fixed protrusion, the part that fixes the wheel hub also bears the integrated hydraulic cylinder, reducing the pressure of the hydraulic cylinder on the wheel hub. When the wheel hub rotates, the position of the integrated hydraulic cylinder remains unchanged, which facilitates the injection of hydraulic oil and ventilation of the hydraulic cylinder, making the aircraft structure simpler, lighter and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of the structure of the present invention;

[0018] Figure 2 The structure of the present invention Figure 1 Back side front view diagram;

[0019] Figure 3 The structure of the present invention Figure 1 Schematic cross-section;

[0020] Figure 4 This is a schematic diagram of the central axis of the structure of the present invention;

[0021] Figure 5 This is an exploded schematic diagram of the brake structure of the present invention.

[0022] In the figure: 1. Pneumatic tire; 2. Outside of rotating wheel hub; 3. Inside of rotating wheel hub; 4. Center shaft; 5. Pneumatic tire nozzle; 6. Ball bearing; 7. Steel brake disc; 8. Brake pad; 9. Hydraulic disc; 10. Integrated hydraulic cylinder; 11. Gasket; 12. Nut; 13. Fixing boss. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] The present invention provides a hub-integrated hydraulic brake device, comprising a hub, an outer ring of which is mounted a pneumatic tire 1, the pneumatic tire 1 comprising an inner tube, an outer tube and a pneumatic tire nozzle 5, through which a user can inflate the pneumatic tire 1.

[0025] The wheel hub comprises a rotating wheel hub outer portion 2 and a rotating wheel hub inner portion 3 fixedly connected to the rotating wheel hub outer portion 2 , and the rotating wheel hub outer portion 2 is located outside the rotating wheel hub inner portion 3 .

[0026] The present invention provides a wheel hub integrated hydraulic brake device, which also includes a brake structure. The brake structure includes an integrated hydraulic cylinder 10, a hydraulic disc 9, a brake pad 8, a steel brake disc 7 and a central shaft 4.

[0027] The outer ring in the middle of the center shaft 4 and the outer ring at one end are fixedly connected with ball bearings 6. The middle of the center shaft 4 is connected to the steel brake disc 7 through the ball bearing 6, and the center shaft 4 is connected to the rotating wheel hub 3 through another ball bearing 6. With this arrangement, when the wheel hub rotates, it can drive the center shaft 4 connected to it to rotate, and the center shaft 4 drives the steel brake disc 7 to rotate.

[0028] Both ends of one side of the integrated hydraulic cylinder 10 are fixedly connected with fixed protrusions 13. A hydraulic oil inlet is provided in the middle of one of the fixed protrusions 13, and an air vent is provided in the middle of the other fixed protrusion 13. When the device is in use, the fixed protrusions 13 can be used to fix the integrated hydraulic cylinder 10 and the parts of the fixed wheel hub together. The other end of the integrated hydraulic cylinder 10 is fixedly connected with a hydraulic disc 9. There are two oil seals on the hydraulic disc 9. The hydraulic disc 9 is connected to the integrated hydraulic cylinder 10 through the oil seal. The space between the two oil seals is filled with hydraulic brake oil. The other end of the hydraulic disc 9 is fixedly connected with a brake pad 8. The brake pad 8, hydraulic disc 9 and integrated hydraulic cylinder 10 are all in a state of active connection with the other end of the central shaft 4.

[0029] It can be seen from the above description that the extension and contraction of the integrated hydraulic cylinder 10 can change the position of the brake pad 8. When the brake pad 8 is tightly fitted with the steel brake disc 7, the braking function can be achieved.

[0030] The brake pad 8 is a special brake material made of a mixture of non-metal and metal.

[0031] A gasket 11 is provided on the outside of the integrated hydraulic cylinder 10, flexibly connected to the central shaft 4. Nuts 12 are threadedly connected to the outer rings of both ends of the central shaft 4. One nut 12 contacts the integrated hydraulic cylinder 10 through the gasket 11, while the other nut 12 contacts the outside of the ball bearing 6 connected to the rotating hub 3. Nuts 12 are slotted nuts, and to prevent the nuts from disengaging during rotation, stainless steel pins can be added to secure the nuts 12 to the central shaft 4.

[0032] In summary: when the wheel hub integrated hydraulic brake device is in use, the steel brake disc 7 rotates with the wheel hub, and the integrated hydraulic cylinder 10 is stationary relative to the wheel hub. When braking is required, the master pump pumps oil into the hydraulic oil inlet, the volume of the liquid therein increases, the integrated hydraulic cylinder 10 extends, and the integrated hydraulic cylinder 10 pushes out the hydraulic disc 9. The hydraulic disc 9 drives the brake pad 8 to rub against the steel brake disc 7 to achieve braking.

[0033] The feature of the present invention is that there is no dedicated hydraulic cylinder, and the fixed hub part also assumes the function of the hydraulic cylinder, so that the structure is simpler, the weight is lighter and the reliability is higher.

[0034] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology and will not be described in detail here. The contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A wheel hub integrated hydraulic brake device, comprising a wheel hub and a brake structure, characterized in that: The outer ring of the wheel hub is provided with a pneumatic tire (1), and the brake structure comprises a central shaft (4) connected to the center of the wheel hub, a steel brake disc (7) connected to the middle of the central shaft (4), a hydraulic disc (9) movably sleeved on the other end of the central shaft (4), a brake pad (8) fixedly connected to a side of the hydraulic disc (9) close to the steel brake disc (7), and an integrated hydraulic cylinder (10) fixedly connected to the other end of the hydraulic disc (9), wherein the integrated hydraulic cylinder (10) is movably connected to the other end of the central shaft (4); Both ends of the integrated hydraulic cylinder (10) on the side away from the hydraulic disc (9) are fixedly connected to fixed protrusions (13), a hydraulic oil inlet is provided in the middle of one of the fixed protrusions (13), and an air vent is provided in the middle of the other fixed protrusion (13), and the integrated hydraulic cylinder (10) is connected to the parts of the fixed wheel hub via the fixed protrusions (13); The wheel hub comprises a rotating wheel hub outer portion (2) and a rotating wheel hub inner portion (3) fixedly connected to the rotating wheel hub outer portion (2), wherein the rotating wheel hub inner portion (3) is located on a side of the rotating wheel hub outer portion (2) close to the steel brake disc (7); A gasket (11) is provided on the outer side of the integrated hydraulic cylinder (10), and the gasket (11) is movably connected to the central shaft (4). The outer rings of both ends of the central shaft (4) are threadedly connected to nuts (12), one of the nuts (12) contacts the integrated hydraulic cylinder (10) through the gasket (11), and the other nut (12) contacts the outer side of the ball bearing (6) connected to the inner side of the rotating hub (3).

2. The wheel hub integrated hydraulic brake device according to claim 1, characterized in that: The pneumatic tire (1) comprises an inner tire, an outer tire and a pneumatic tire nozzle (5).

3. The wheel hub integrated hydraulic brake device according to claim 1, characterized in that: The outer rings at both ends of the central shaft (4) are connected to ball bearings (6), the outer rotating hub (2) is connected to the central shaft (4) through a ball bearing (6), and the steel brake disc (7) is connected to the central shaft (4) through another ball bearing (6).

4. The wheel hub integrated hydraulic brake device according to claim 1, characterized in that: The nut (12) is a slotted nut.

5. The wheel hub integrated hydraulic brake device according to claim 1, characterized in that: Oil seals are provided on both the inner and outer sides of the hydraulic disc (9), and the hydraulic disc (9) is connected to the integrated hydraulic cylinder (10) via the oil seals, with the space between the two oil seals being filled with hydraulic brake oil.

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