193results about "Fluid actuated brakes" patented technology

The bulldozer has a right first oil channel, a right second oil channel, and a right third oil channel. The right first oil channel guides a portion of the lubricating oil discharged by a hydraulic pump to a right steering brake. The right second first oil channel guides a portion of the lubricating oil discharged by the hydraulic pump to a right planetary gear mechanism. The right third oil channel guides at least a portion of the lubricating oil that has passed through the right planetary gear mechanism to a right steering brake. At least a portion of the planetary gear mechanism is disposed further inside than the right steering brake in a radial direction perpendicular to the center axis of an input shaft.

Aspects of the present invention relate to a wet disc brake for an off-highway vehicle comprising: a brake caliper a disc pack located within the brake caliper and arranged to locate on a vehicle shaft having a longitudinal axis extending in an inboard-outboard direction, the disc pack comprising: a plurality of counter discs arranged in series on the axis; and a plurality of friction discs arranged in series on the axis in an alternating arrangement with the counter discs, each friction disc comprising friction material and being configured to be rotatably fixed to the vehicle shaft; and a piston actuatable within the brake caliper during a brake operation to urge the friction material of the friction discs to engage the counter discs to slow the vehicle; and a contactless wear sensor assembly configured to measure the axial length of the disc pack.

An axle assembly for a working vehicle is provided. The axle assembly comprises an axle comprising a casing and a driveshaft located within the casing. The axle assembly also comprises a wheel hub for mounting a wheel thereto, wherein the wheel hub is located at an outboard end of the axle and comprises a wheel driving element which is coupled to the driveshaft by a gear arrangement. The axle assembly also comprises a brake system comprising a service brake configured to apply a braking force to the driveshaft, and an auxiliary brake configured to apply a braking force to the wheel driving element.

The present invention relates to a wet disc brake (10) for an off-highway vehicle comprising: a brake caliper (14), a disc pack (28) located within the brake caliper (14) and arranged to locate on a vehicle shaft having a longitudinal axis extending in an inboard-outboard direction, the disc pack (28) comprising: a plurality of counter discs (30) arranged in series on the axis; and a plurality of friction discs (34) arranged in series on the axis in an alternating arrangement with the counter discs (30), each friction disc (34) comprising friction material and being configured to be rotatably fixed to the vehicle shaft; and a piston (46) actuatable within the brake caliper (14) during a brake operation to urge the friction material of the friction discs (34) to engage the counter discs (30) to slow the vehicle; and a contactless wear sensor assembly (66) configured to measure the axial length of the disc pack (28).

A brake system includes a series of rotors for operatively coupling to a shaft and stators for operatively coupling to a frame. A service brake system includes a singular annular service piston extending continuously around the series of rotors and stators and a parking brake system includes a singular annular parking piston positioned to extend continuously around the series of rotors and stators. The service piston nests with the parking piston, under a spring bias, such that the parking piston and service piston continuously engage together around the series of rotors and stators to thereby create the parking brake forces. Springs act on the parking piston to drive the parking piston and nested service piston to engage for parking brake forces. Pressurization of the parking piston deactuates the nested pistons. Then separate pressurization of fluid acts on the service piston to overcome the spring bias and separate the service piston from the parking piston to create service brake forces.

A brake assembly (200, 1100) for a work machine (100) includes a main brake housing (202), a disc stack (204), a brake housing (214) coupled with the main brake housing (202), and a piston (216) to compress the disc stack (204). At least one of the main brake housing (202) and the piston (216) define at least two spring pockets (205). The at least two spring pockets (205) are circumferentially spaced apart from each other. The brake assembly (200, 1100) also includes at least two spring assemblies (218) disposed between the main brake housing (202) and the piston (216). The at least two spring assemblies (218) are adapted to engage the piston (216) with the disc stack (204) to apply brakes via the brake assembly (200, 1100). Each spring pocket (205) of the at least two spring pockets (205) receives a corresponding spring assembly (218) of the at least two spring assemblies (218). Each of the at least two spring assemblies (218) includes at least one Belleville spring (232).

This disclosure describes a clamping and / or braking device for clamping and / or braking an object to be clamped and / or braked, comprising: a housing comprising a first housing part and a second housing part, wherein each of the housing parts comprises an annular recess, which defines a first contact surface of the housing part and a second contact surface of the housing part, and wherein the two housing parts are arranged relative to one another and fastened to one another in such a way that the recesses of the first and second housing parts together form an inner space within the housing; a spring arranged in the inner space comprising a first annular spring plate and a second annular spring plate, wherein the first annular spring plate is clamped in the annular recess of the first housing part between the first contact surface and the second contact surface of the first housing part, and wherein the second annular spring plate is clamped in the annular recess of the second housing part between the first contact surface and the second contact surface of the second housing part; at least one clamping element, wherein each clamping element has a clamping surface which is designed, when a first end of one of the spring plates is supported on the first contact surface of one of the housing parts and a second end of the one of the spring plates presses on the second contact surface of the one of the housing parts, to transmit a clamping and / or braking force to the object to be clamped and / or braked; wherein the spring plates are arranged within the inner space in such a way that in the inner space at least one pressure space is formed, which is at least partially delimited by the spring plates, wherein the pressure space can be ventilated or vented and can be acted upon by positive pressure of a pressure medium which can be supplied to the housing, wherein the spring plates are arranged relative to the at least one pressure space in such a way that by ventilating or venting the pressure space or acting upon the pressure space with positive pressure, a bending of at least one of the spring plates can be changed and thereby the clamping and / or braking device changes between an open state, in which the at least one clamping surface is spaced apart from the object, and a closed state, in which one or more of the at least one clamping surfaces transmit a clamping and / or braking force to the object; wherein the clamping and / or braking device further comprises at least one insert plate, which is arranged between the first spring plate and the second spring plate in the inner space.

This invention discloses a brake assembly based on reverse stroke self-locking, including an axle that mates with a wheel and a brake disc mounted on the axle for braking, and a piston driver that drives brake friction blocks to brake the brake disc. These are the main components of a conventional train braking device. In this invention, the brake friction blocks are arranged in two sets symmetrically at both ends of the brake disc, and braking is achieved through a braking mechanism. The braking mechanism outputs a reverse stroke self-locking degree of freedom to the brake friction blocks. This invention, through the mechanical linkage and cooperation between multiple braking mechanisms, provides a reverse stroke braking torque during practical application, increasing the friction between the brake friction blocks and the wheel, maintaining the stability of the brake caliper, and preventing brake slack. This improves the overall braking efficiency and safety of the train, and reduces the failure rate and maintenance costs of the braking system.

A hydraulic or pneumatic actuating arrangement with a multi-disk switching element having an actuating cylinder (8) connected to a hydraulic or pneumatic supply for actuating a disk pack of the multi-disk switching element, wherein a double-acting actuating cylinder (8) is provided with a first pressure chamber (10) associated with a first piston surface (9) and a second pressure chamber (12) associated with a second piston surface (11), wherein the two piston surfaces (9, 11) have different effective areas, wherein the first pressure chamber (10) and the second pressure chamber (12) are connected to one another during a first actuating phase to overcome a clearance (s) in the multi-disk switching element, and wherein the first pressure chamber (10) and the second pressure chamber (12) are separated from one another during a second actuating phase to close the multi-disk switching element, characterized in thatthat in the first actuation phase, the first pressure chamber (10) and the second pressure chamber (12) are subjected to a first actuation pressure (P1) of the hydraulic or pneumatic supply, and that in the second actuation phase, the first pressure chamber (10) is subjected to a second, higher actuation pressure (P2) of the hydraulic or pneumatic supply, and the second pressure chamber (12) is depressurised.

Pneumatically actuated drum brake (100) for a vehicle (200a), in particular a commercial vehicle (200b), wherein the drum brake (100) comprises: a brake drum (110) with two radially extended annular braking surfaces (115); a brake carrier (120) arranged radially inside the brake drum (120); an annular brake lining arrangement (130); and a pneumatically actuated ring piston arrangement (160) for applying an axially acting clamping force of the brake lining arrangement (130) against the braking surfaces (115); wherein the brake carrier (120) comprises an air supply arrangement (125); and the air supply arrangement (125) is configured to be pneumatically actuated for the pneumatic actuation of the ring piston arrangement (160).

The invention relates to a hydraulic brake, clutch or clutch-brake combination for a work machine, which is designed to be switchable by means of a hydraulic medium delivered by a hydraulic pump (18), with a rotor disk (4) arranged on a shaft in a rotationally fixed but axially displaceable manner and a counterpart (15) cooperating therewith, wherein the counterpart (15) is mounted axially displaceably in relation to the rotor disk (4), with a mechanical force transmitter (17) designed to apply force to the counterpart (15) in the axial direction, and with a hydraulic piston (13) provided by a cylinder-piston arrangement (12), which is designed to be movable in the axial direction and is designed to act on the counterpart (15) in the event of pressure being applied with hydraulic medium delivered by the hydraulic pump (18) in a manner counter to the force applied by the force transmitter (17), characterized in thatthat the hydraulic pump (18) fluidically interacts with a reservoir (20) accommodating hydraulic fluid, wherein the hydraulic pump (18) and the reservoir (20) are designed for intended use exclusively with the cylinder-piston arrangement (12), and that a bypass line (24) is provided which fluidically bypasses the hydraulic pump (18) and fluidically connects the reservoir (20) to the cylinder-piston arrangement (12), wherein an electrically switchable valve (25) is integrated into the bypass line (24) and is designed to open the bypass line (24) in the event of a de-energized position of the valve (25).

This invention discloses a hydraulically controlled limited-slip differential, belonging to the field of engineering machinery technology. It mainly includes a differential torque device connected to a drive axle housing. The differential torque device includes a cylinder housing with an oil port A. The drive axle housing has an oil port B that mates with oil port A. Oil ports A and B are sealed together by a sealing pin. The connection between the cylinder housing and the drive axle housing via the sealing pin simplifies the oil supply structure and improves installation and maintenance. The oil port A of the cylinder housing is connected to the drive axle housing via a sealing pin, facilitating assembly and maintenance. Furthermore, anti-rotation measures are added to eliminate the risks of wear and oil leakage caused by component rotation due to inertia and torque. This invention is primarily used in engineering machinery.

An actuation assembly for hydraulically actuating first and second sub-clutches or brakes includes a hydraulic functional release surface, a first pressing surface, a second pressing surface, and a common release connection. The first pressing surface is larger than the hydraulic functional release surface and arranged to generate a pressing force to the first sub-clutch or brake to transmit torque. The second pressing surface is larger than the hydraulic functional release surface and arranged to generate a pressing force to the second sub-clutch or brake to transmit torque. The common release connection is for bridging respective release paths of the first and second sub-clutches or brakes before the first and second sub-clutches or brakes transmit respective torques.

A drivetrain including a motor, a transmission assembly, and a park brake assembly is provided. The transmission assembly includes a main shaft extending along a central longitudinal axis between a first end and a second end and configured to be driven by the motor. The second end configured to be operably coupled to at least one wheel to drive the at least one wheel. The park brake assembly integrated into the transmission assembly and operably coupled to the first end of the main shaft. The park brake assembly configured to apply a park brake torque at the first end of the main shaft to inhibit rotation of the main shaft and the at least one wheel.

The invention relates to a braking and / or clamping device comprising an annular housing which has at least one pneumatic or hydraulic connection and surrounds a rod receptacle oriented in the axial direction, wherein the housing has a base part and a cover part, and wherein at least one annular pressure chamber is located within the housing. The pressure chamber is delimited in the axial direction by means of at least one piston which is movable in the axial direction. The pressure chamber is delimited in the radial direction by means of the outer walls of the housing and by means of at least one inner ring which surrounds an inner wall of the housing, said inner wall having at least one inner wall portion. In the housing, a disk element is disposed on the piston top face, which faces away from the pressure chamber and is oriented in the axial direction. The piston top face is or can be seated against or fastened to said disk element. The inner wall portion is protrudingly located in a cover part or in a base part of the housing. By means of the present invention, a quickly responding braking and / or clamping device having a small stroke and high accuracy is developed.

The present invention relates to disc brake caliper (1), comprising a caliper body (2) arranged straddling a brake disc having a rotation axis defining an axial direction (A-A) and opposite friction surfaces, said caliper (1) comprising pads (3) accommodated in said caliper body (2) so as to slide substantially in an axial direction (A-A) with respect to the brake disc to act on said opposite friction surfaces, respectively, said caliper (1) comprising a cylinder (4), forming a cylindrical wall (5) and a bottom wall (6) transverse to the cylindrical wall (5), said caliper (1) further comprising a parking braking system (10) comprising a rotating member (11); said rotating member (11) being rotatably accommodated inside a rotation seat (12) formed in the bottom wall (6) of the cylinder (4), so that the rotating member (11) is rotatable about a rotation axis substantially parallel to the axial direction (A-A), wherein the cylinder (4) defines a first annular seat (13) and a second annular seat (14) made in the bottom wall (6), said first and second annular seat (13, 14) extending into the bottom wall (6) in a direction transverse to the axial direction (A-A) and leading into the rotation seat (12), said second annular seat (14) being distinct from said first annular seat (13), and being positioned in the opposite direction to the inner surface (25) of the bottom wall (6) with respect to said first annular seat (13), wherein the first annular seat (13) accommodates a first seal (15), and the second annular seat (14) accommodates a second seal (16), and wherein the first and the second seals (15, 16) are configured to act between said rotating member (11) and said bottom wall (6) of the cylinder (4) to make a fluid seal; wherein the first seal (15) comprises an O-ring (19) coupled to a backup ring (20), wherein said backup ring (20) is interposed between the O-ring (19) and the rotating member (11), and is made of less deformable material than the material of the 0- ring (19); the backup ring (20) comprises an axial wall (27) extending parallel to the axial direction (A-A), interposed between said O-ring (19) and the rotating member (11) and a transverse shoulder (28) interposed between said O-ring (19) and the bottom wall (6) in the direction of the outer surface (26).

The invention relates to a brake assembly (6) for braking an axle (4), comprising: a housing (8) enclosing an interior (11); a main body (9); a rotatably mounted axle (10), which extends at least partially in the interior (11) and has a connecting flange (13) for an axle (4); an axially displaceable brake disc (18) mounted on the shaft (10) for common rotation with the shaft; a first braking surface (36a) against which the brake disc (18) can be axially pressed; a second axially movable braking surface (36b) located on the other side of the brake disc (18); a wedge transmission (24) for pressing the second braking surface (36b) against the brake disc (18) and thus the brake disc (18) against the first braking surface (36a); and a cooling conductor (40) for dissipating heat generated during braking from the two braking surfaces (36a, 36b).

The present disclosure relates to a clamping and / or braking device for clamping and / or braking an object to be clamped and / or braked, comprising: a housing comprising a first housing part and a second housing part, wherein each housing part comprises an annular recess which defines a first contact face and a second contact face of the housing part, and wherein the two housing parts are arranged opposite to each other and fastened to each other such that the annular recesses of the first and second housing parts together form an inner space within the housing; a spring arranged in the inner space comprising a first annular spring plate and a second annular spring plate, wherein the first annular spring plate is clamped in the annular recess of the first housing part between the first contact face and the second contact face of the first housing part and the second annular spring plate is clamped in the annular recess of the second housing part between the first contact face and the second contact face of the second housing part; and at least one clamping element, wherein each clamping element has a clamping face which is designed to transmit a clamping and / or braking force to the object to be clamped and / or braked when a first end of one annular spring plate is supported on the first contact face of one housing part and a second end of the annular spring plate is pressed on the second contact face of the housing part, wherein the first and second annular spring plates are arranged within the inner space such that at least one pressure space is formed in the inner space which is at least partially delimited by the first and second annular spring plates, which pressure space can be vented or evacuated and to which a positive pressure of a pressure medium supplied to the housing can act, wherein the first and second annular spring plates are arranged relative to the at least one pressure space such that by venting or evacuating the pressure space or by acting on the pressure space with a positive pressure, the bending of at least one annular spring plate can be changed, thereby changing the clamping and / or braking device between an open state in which the at least one clamping face is spaced apart from the object and a closed state in which one or more of the at least one clamping face transmits a clamping and / or braking force to the object; wherein the clamping and / or braking device further comprises at least one insert plate which is arranged in the inner space between the first annular spring plate and the second annular spring plate.

The utility model relates to a brake torque adjusting mechanism of a disc brake. The technical problem that an existing brake cannot conduct semi-braking is solved. Comprising a brake shell and a transmission shaft rotationally arranged in the brake shell, the transmission shaft is sleeved with a friction plate assembly, a piston body is arranged on the inner side of the brake shell in the circumferential direction, the piston body is of a split structure, and the piston body is provided with a small piston and a large piston abutting against the small piston. A first braking jacking assembly is arranged at the end, away from the small piston, of the large piston, a second braking jacking assembly is arranged at the end, away from the large piston, of the small piston, and a first oil way assembly and a second oil way assembly are arranged in the brake shell. The transmission shaft has the advantages that the first oil way assembly can keep the large piston away from the friction plate assembly, and the transmission effect of the transmission shaft is guaranteed. The second oil way assembly can enable the small piston to overcome the pressure of the second braking jacking assembly, so that the friction plate assembly brakes and decelerates the transmission shaft, the rotating speed of the transmission shaft is reduced, and the deceleration effect is guaranteed.

Brake (1) with a device for determining a wear limit, comprising a housing (2), at least one first brake body (3), at least one second brake body (4) and a pressure piece unit (10) with a pressure piece (12) which is displaceable relative to the housing (2) in a first direction to press the at least one first brake body (3) and the at least one second brake body (4) against each other to brake, i.e. to close the brake, and is displaceable in a second direction to release the brake, i.e.to open the brake, a sensor (20) which is configured to detect a positional relationship between it and a detection surface (11) formed on the pressure piece unit (10), wherein if the brake (1) has not reached its wear limit, the positional relationship between the sensor (20) and the detection surface (11) does not change during the movement of the pressure piece (12) in the first direction, and if the brake (1) has reached its wear limit, the positional relationship between the sensor (20) and the detection surface (11) changes during the movement of the pressure piece (12) in the first direction by a relative movement between the sensor (20) and the detection surface (11).

The invention relates to an electric drive (1) for a vehicle. At least one electric machine (20), a differential (21), and two brakes (22) are installed in a common housing (6), and the brakes (22) are disc brakes with a first and a second disc pack (15, 16) which are arranged on the side output shafts (8) of the differential (21) so as to rotate therewith and connect the side output shafts (8) to a brake housing (9) in the event of an actuation in order to apply a braking torque to the vehicle.

The invention relates to an aircraft wheel (1) braking device (10), comprising: - a torque tube (13, 13') extending along a longitudinal axis; - a stack of brake discs (11) including a last stator disc; - at least one actuator (18) comprising a piston translatably mounted between a first end position in which the piston is spaced apart from the stack of discs and a second end position, in order to exert a pressing force on the first stator disc; and - at least one stud (14) arranged between a second end of the torque tube and the last stator disc in order to take up and transfer the pressing force to the torque tube. The last stator disc and the torque tube are shaped so as to define therebetween a minimum clearance which is less than the distance separating the piston from its second end position when the piston exerts the pressing force.

An axle assembly 10 for a working vehicle is provided. The axle assembly comprises an axle 12 comprising a casing 14 and a driveshaft 16 located within the casing. The axle assembly also comprises a wheel hub 20 for mounting a wheel thereto, wherein the wheel hub is located at an outboard end of the axle and comprises a wheel driving element 24 which is coupled to the driveshaft by a gear arrangement. The axle assembly also comprises a brake system 28 comprising a service brake 30 configured to apply a braking force to the driveshaft, and an auxiliary brake 32 configured to apply a braking force to the wheel driving element.

The present disclosure describes a housing member for a pneumatic clamp and / or brake device, the housing member having an annular recess for clamping an annular spring plate between a first contact surface of the housing member defined by the recess and a second contact surface of the housing member defined by the recess, and a clamp element having a clamping surface, the clamping surface being such that when the spring plate is clamped between the first contact surface and the second contact surface within the recess, whereby a first end of the spring plate is supported by the first contact surface, the spring plate extends from the first contact surface to the second contact surface, and a second end of the spring plate presses against the second contact surface, a clamping force and / or a braking force is transmitted to an object to be clamped and / or braked, and the housing member includes first locking means and second locking means, and when the spring plate is clamped between the first contact surface and the second contact surface within the recess, the first locking means is configured to lock the first end of the spring plate to the first contact surface, and the second locking means is configured to lock the second end of the spring plate to the second contact surface. The present disclosure further describes a clamp and / or brake device including two housing members for clamping and / or braking an object to be clamped and / or braked.

The invention relates to a functionally improved multi-piston disengagement system (1) for actuating a brake apparatus (41) of a brake device (40) for a vehicle. The multi-piston disengagement system (1) comprises an annular housing (2) which has a main axis (5), the main axis (5) defining an axial direction (6). The annular housing (2) comprises a plurality of housing portions (4), wherein a pressure chamber (9) that is and / or can be filled with a fluid is arranged in each housing portion (4). The multi-piston disengagement system (1) has a plurality of hydraulic actuation assemblies (3), a housing portion (4) being associated with each actuation assembly (3). Each actuating assembly (3) comprises a piston assembly (17) with a hydraulically movable piston (18) which can execute an actuating stroke in the axial direction (6) in the event of hydraulic pressure application and which can generate an actuating force for activating the brake apparatus (41). The actuating force can be dissipated into the annular housing (2) so that the actuation of the brake apparatus (41) can occur in an axial force-free manner.