Abstract: An object of the present invention is to provide a brake apparatus capable of reducing a size and a weight. A brake apparatus according to the present invention includes a master cylinder housing including a first port that connects an inside and an outside of a cylinder, and a valve housing including an oil passage through which brake fluid introduced from a second port connected to the first port flows. One side of the master cylinder housing where one side surface thereof is located is attached to one side of the valve housing where one side surface thereof is located. The brake apparatus includes a connection portion that connects the first port and the second port between the one side surface of the master cylinder housing and the one side of the valve housing where the one side surface thereof is located.

Abstract: An object of the present invention is to provide a brake apparatus that can achieve a characteristic capable of increasing a pressure with high responsiveness without relying on a discharge capability of a pump. According to an aspect of the present invention, a brake apparatus includes an operation rod configured to be activated according to an operation of a brake operation member and having a first diameter, a stepped piston including an intermediate-diameter portion having a larger diameter than the first diameter on one side, a large-diameter portion having a larger diameter than the diameter of the intermediate-diameter portion, and an insertion hole in which the operation rod is relatively displaceably inserted from an axial direction, a first pressure chamber formed between the first diameter and the intermediate-diameter portion, and a second pressure chamber formed between the intermediate-diameter portion and the large-diameter portion.

Abstract: The present invention provides a brake device that can improve the pressure-increasing response of wheel cylinder hydraulic pressure. The invention is provided with: a master cylinder (5) actuated by the driver operating the brake, the master cylinder (5) being connected to a wheel cylinder (8) via a first oil channel (11), and capable of increasing the wheel cylinder hydraulic pressure; and an auxiliary pressure-increasing part (auxiliary pressure-increasing part (106) and stroke simulator (27)) for assisting in the increasing of the wheel cylinder hydraulic pressure by the master cylinder (5) of the pump (7).

Abstract: An object of the present invention is to provide a brake apparatus capable of highly accurately detecting a stroke amount of a brake pedal. According to an aspect of the present invention, a brake apparatus includes a master cylinder unit and a stroke sensor. The master cylinder unit includes therein a piston configured to carry out a stroke via a rod axially actuated according to an operation performed by a driver on a brake pedal, and an oil passage through which brake fluid flows after flowing out according to the stroke of the piston. The stroke sensor is attached to an outer wall of the master cylinder unit and configured to detect an axial stroke amount of the piston.

Abstract: Provided is a brake device that can increase energy efficiency. The present invention is provided with: a master cylinder (5) that generates fluid pressure alongside the operation of a brake by a driver; and a booster device that reduces the force of operation of the brake by the driver by means of an energy source (fluid pressure unit 86)). In a predetermined brake operation region, the operation of the booster device is suppressed.

Abstract: An object of the present invention is to provide a brake apparatus capable of improving applicability to a wide range of vehicles. A brake apparatus includes a master cylinder 4 provided in such a manner that a piston 41 is axially operable in a master cylinder housing 40, and a stroke simulator 5 including a reaction force piston 51 axially operable by brake fluid introduced into a stroke simulator housing 50. The master cylinder housing 40 is fixed to the stroke simulator housing 50.

Abstract: A brake apparatus improved in mountability on a vehicle is provided. The apparatus includes a master cylinder 4 that generates hydraulic brake pressure by a driver's brake operation, and a stroke simulator 5 that creates an artificial operation reaction force of a brake operation member when the brake fluid flown out of the master cylinder 4 enters the stroke simulator 5. The master cylinder 4 and the stroke simulator 5 are integrally arranged to overlap each other in a perpendicular direction (as viewed from the perpendicular direction) when installed in the vehicle.

Abstract: A master cylinder 5 includes: a first liquid chamber 51 generating a liquid pressure in response to a brake operation of a driver; and a second liquid chamber 52 communicated with a reservoir 4 and connected to a suction port 70 of a pump 7. In a state in which the reservoir 4 and a suction section 70 of the pump 7 are communicated via the second liquid chamber 52, a liquid pressure of the first liquid chamber 51 can create a wheel cylinder liquid pressure.

Abstract: The present invention provides a brake device that can improve the pressure-increasing response of wheel cylinder hydraulic pressure. The invention is provided with: a master cylinder (5) actuated by the driver operating the brake, the master cylinder (5) being connected to a wheel cylinder (8) via a first oil channel (11), and capable of increasing the wheel cylinder hydraulic pressure; and an auxiliary pressure-increasing part (auxiliary pressure-increasing part (106) and stroke simulator (27)) for assisting in the increasing of the wheel cylinder hydraulic pressure by the master cylinder (5) of the pump (7).

Abstract: A brake unit (1) includes: a master cylinder (2) unit which is fixed to a vehicle body, and which includes a master cylinder (2b) that is received within a first housing (20), and that is arranged to be interlocked with a brake pedal; and a pump unit (3) which is arranged to be driven by a motor (3), and which includes a second housing (30) within which a pump arranged to increase a wheel cylinder pressure is received, the master cylinder unit (2) and the pump unit (3) being integrally fixed through a mount (6) which is an elastic member.

Abstract: A master cylinder 5 includes: a first liquid chamber 51 generating a liquid pressure in response to a brake operation of a driver; and a second liquid chamber 52 communicated with a reservoir 4 and connected to a suction port 70 of a pump 7. In a state in which the reservoir 4 and a suction section 70 of the pump 7 are communicated via the second liquid chamber 52, a liquid pressure of the first liquid chamber 51 can create a wheel cylinder liquid pressure.

Abstract: Provided is a brake device that can increase energy efficiency. The present invention is provided with: a master cylinder (5) that generates fluid pressure alongside the operation of a brake by a driver; and a booster device that reduces the force of operation of the brake by the driver by means of an energy source (fluid pressure unit 86)). In a predetermined brake operation region, the operation of the booster device is suppressed.

Abstract: A gear pump includes: a drive shaft; a first gear; a second gear; a first plate disposed between the first gear and the second gear, and arranged to liquid-tightly seal the first surfaces of the first and second gear; a pair of second plates disposed, respectively, on the second surfaces of the first and second gears, and arranged to liquid-tightly seal the second surfaces of the first and second gears, each of the second plates including a tooth top sealing portion having a seal surface arranged to seal a tooth top of the first gear and a tooth top of the second gear, and to form a suction portion with the first plate and the second plate; and an urging member arranged to urge the drive shaft toward the seal surface of the tooth top sealing portion of one of the first and second plates.

Abstract: A gear pump includes a gear to be driven by a drive shaft, a pair of side plate members adjoining side surfaces of the gear, respectively, to restrain leakage of an operating fluid, and a tip seal member or seal block for sealing the gear tip or circumference of the gear. At least one of the side plate members and the tip seal member are integral parts of a sealing member.

Abstract: A seal apparatus includes at least one pair of gears; a side plate arranged adjacent to the pair of gears; and a housing sandwiching the side plate. At least one of the side plate and the housing includes a shoulder portion. The seal apparatus further includes a seal member arranged between the housing and the side plate and arranged at the shoulder portion. The seal member separates a low pressure area from a high pressure area in a radial direction of the gear. The shoulder portion is located in the low pressure area. At least a part of the seal member faces the high pressure area. The seal apparatus further includes a backup member reinforcing the seal member and facing a tip portion of the shoulder portion; and a containing portion formed between a root portion of the shoulder portion and the seal member to be capable of containing a part of the seal member at least when the seal member is elastically deformed.

Abstract: A gear pump includes: a drive shaft; a first gear; a second gear; a first plate disposed between the first gear and the second gear, and arranged to liquid-tightly seal the first surfaces of the first and second gear; a pair of second plates disposed, respectively, on the second surfaces of the first and second gears, and arranged to liquid-tightly seal the second surfaces of the first and second gears, each of the second plates including a tooth top sealing portion having a seal surface arranged to seal a tooth top of the first gear and a tooth top of the second gear, and to form a suction portion with the first plate and the second plate; and an urging member arranged to urge the drive shaft toward the seal surface of the tooth top sealing portion of one of the first and second plates.

Abstract: A gear pump includes a gear to be driven by a drive shaft, a pair of side plate members adjoining side surfaces of the gear, respectively, to restrain leakage of an operating fluid, and a tip seal member or seal block for sealing the gear tip or circumference of the gear. At least one of the side plate members and the tip seal member are integral parts of a sealing member.

Abstract: A seal apparatus includes at least one pair of gears; a side plate arranged adjacent to the pair of gears; and a housing sandwiching the side plate. At least one of the side plate and the housing includes a shoulder portion. The seal apparatus further includes a seal member arranged between the housing and the side plate and arranged at the shoulder portion. The seal member separates a low pressure area from a high pressure area in a radial direction of the gear. The shoulder portion is located in the low pressure area. At least a part of the seal member faces the high pressure area. The seal apparatus further includes a backup member reinforcing the seal member and facing a tip portion of the shoulder portion; and a containing portion formed between a root portion of the shoulder portion and the seal member to be capable of containing a part of the seal member at least when the seal member is elastically deformed.