172 results about "Drum brake" patented technology

Disclosed is a wheel cylinder and a drum brake having the same, in which the number of position as well as other elements accompanied with the piston may be reduced, resulting in reduced manufacturing cost.

An actuator for a heavy vehicle foundation brake (e.g. disc or drum brake), and a brake assembly, vehicle and method including the actuator. The actuator includes: an (output) pushrod 30, 230a to inte

An actuator for a heavy vehicle foundation brake (e.g. disc or drum brake), and a brake assembly including the actuator. The actuator includes: an actuator housing 111 having an outboard end fixable t

The mechanical double-leading and double-trailing drum brake comprises a brake drum, a brake bottom plate and two sets of brake units, the two sets of brake units are oppositely installed on the front face of the brake bottom plate in a left-right mode, and each brake unit comprises a leading brake shoe block, a trailing brake shoe block and a rotating cam arranged between the leading brake shoe block and the trailing brake shoe block. The two rotating cams are connected with the same connecting rod arranged on the back face of the brake bottom plate. The brake drum is uniformly stressed by taking the leading shoe block and the trailing shoe block as central symmetry with the circle center of the brake bottom plate, so that the brake drum and a hub bearing are protected from being damaged or even damaged by deflection force, and the service life of the brake drum and the hub bearing is greatly prolonged; and in addition, due to the arrangement of the double-leading double-trailing four-shoe block, the service life of the drum brake is prolonged, the friction force is uniform, the braking effect is better, the personal safety of a driver is ensured, and the braking is safer and more reliable.

The drum brake comprises a brake drum, a shoe block assembly and a one-way ratchet wheel assembly, the shoe block assembly comprises a transmission shaft, a shoe block and a first elastic piece, the transmission shaft is connected with the brake drum in a pivoted mode around the axis of the transmission shaft, and the transmission shaft is connected with the shoe block. The transmission shaft rotates around the axis of the transmission shaft in the first direction so as to drive the shoe block to move from the initial position to the brake position abutting against the brake drum, the first elastic piece presses the shoe block towards the initial position, the one-way ratchet wheel assembly comprises a crank, a ratchet wheel and a pawl, the ratchet wheel is coaxially connected with the transmission shaft, and the crank is pivotally connected with the ratchet wheel around the axis of the ratchet wheel. The crank is suitable for driving the ratchet wheel to synchronously rotate in the first direction through the pawl. The drum brake provided by the utility model has the advantages of high convenience in extension compensation of the brake cable, long service life of the shoe block and low use cost.

A running gear assembly for a vehicle includes an inner flange, an optional brake member assembly, and a unit hub. The inner flange may be connected to either an axle or an independent suspension member. The brake member assembly—when present—may be any type of brake member assembly commonly used for vehicles, including—but not limited to—electrically, hydraulically, or mechanically actuated drum brakes and hydraulically actuated disc brakes. The unit hub allows the wheel and tire assembly to connect to the vehicle without the need for a spindle.

The utility model relates to the technical field of brake performance detection of elevator brakes, and discloses a brake wheel and brake shoe gap measuring device of an elevator drum brake, which comprises a shell, a fixing mechanism comprises two measuring bases, one sides, far away from each other, of the two measuring bases are fixedly connected with a guide shaft, and the guide shaft is fixedly connected with the shell. An S-pole magnet is fixedly connected to the interior of the guide shaft, a mounting shaft is slidably connected to the interior of the guide shaft, and an N-pole magnet is fixedly connected to the exterior of the mounting shaft. According to the utility model, the bottom of the mounting shaft is aligned with the interior of the guide shaft, then the mounting shaft is inserted into the interior of the guide shaft, and the plurality of L-shaped grabbing teeth are pushed to rotate in the insertion process of the mounting shaft, so that the mounting shaft is fixed in the insertion process; and the N-pole magnet fixed at the bottom of the mounting shaft is matched with the S-pole magnet in the guide shaft, so that the stability of the measuring mechanism in the measuring process is further ensured, and the measuring effect is improved.

The utility model relates to the technical field of brake pad production equipment, in particular to a drum brake pad flexible side edge machining device which comprises a rack, and the rack is provided with a machining unit, a supporting unit, an adjusting unit and a first driving device. The machining unit comprises a grinding wheel and a second driving device for driving the grinding wheel to rotate; and the adjusting unit comprises a base, a support used for fixing the second driving device is arranged above the base, and the base is rotationally connected with the rack through a rotating shaft. The base is rotationally connected with the rack, and the machining unit is arranged above the base, so that the machining requirements of different side edges of the brake pad are met by rotating the rotating shaft, adjusting the angle between the base and the horizontal plane and adjusting the angle of a grinding wheel in the machining unit. The side edge machining device can be used for machining side edges of different types of brake pads, and the diversified flexible machining requirements of different side edge requirements of the brake pads are met.

The invention discloses a fault detection method, device and equipment for an elevator lever drum brake, and relates to the field of fault detection.The method comprises the steps that original signal data of the elevator lever drum brake are obtained; carrying out sparse processing on the weight of a filter of each convolutional layer in the ResNet fault diagnosis network according to the global pruning rate to obtain a sparse ResNet fault diagnosis network; pruning a filter of each convolutional layer in the sparse ResNet fault diagnosis network by adopting a K-means clustering algorithm to obtain a pruned ResNet fault diagnosis network; and inputting the original signal data into the pruned ResNet fault diagnosis network to obtain a fault detection result of the elevator lever drum brake. According to the invention, the fault detection efficiency of the elevator lever drum brake is improved.

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).

Provided is a braking structure. The drum brake solves the problem that dust is easily accumulated in a brake drum of an existing drum brake, and the braking effect is affected. The brake device comprises a brake shoe arranged on a main body and used for being matched with a brake drum; the brake drum is connected with the rotating part, a containing groove and a communicating hole are formed in the brake drum, the brake shoe is arranged in the containing groove of the brake drum, and the brake shoe is provided with a first position when the brake shoe is installed and a second position when the brake shoe is opened to be matched with the brake drum to be used for braking; the communicating hole extends inwards from the outer surface of the brake drum and is communicated with the accommodating groove; and the protective cover is arranged on the outer surface of the brake drum and on the outer side of the communicating hole. The communication hole is formed in the brake drum, the containing groove can be communicated with the external space, air flowing is enhanced, the possibility that the brake shoe and the brake drum cannot be separated for braking and locking is reduced, and due to the arrangement of the protective cover, it is avoided that external media enter the containing groove through the communication hole, and the braking performance of a product is affected.

This utility model belongs to the field of tricycle technology and discloses a braking linkage system and a tricycle. The braking linkage system includes a handlebar, a diverter valve, a front disc brake, a junction box, a left rear drum brake, and a right rear drum brake. The handlebar includes a grip and a handbrake lever. The diverter valve has a first valve core and has a main oil port, a front diverter oil port, and a rear diverter oil port. Rotating the handbrake lever can drive the first valve core to move, so that the front diverter oil port and the rear diverter oil port are connected to the main oil port. The front diverter oil port is connected to the front disc brake through a front outlet pipe. The junction box has an inner cavity and a piston. The piston is connected to the left rear drive wire and the right rear drive wire. The rear diverter oil port is connected to the inner cavity. The left rear drum brake is connected to the left rear drive wire, and the right rear drum brake is connected to the right rear drive wire. The tricycle includes the above-mentioned braking linkage system. This braking linkage system can realize the linkage braking of the front wheel, left rear wheel, and right rear wheel of the tricycle, with good braking performance and high safety.

This invention provides a dustproof and sandproof truck brake drum sealing structure, belonging to the technical field of truck drum brakes. It includes a brake drum, with an axle fixedly connected to its inner wall and a locating pin fixedly connected to its outer surface. A first sealing groove is formed on the inner wall of the brake drum near the locating pin. A sealing mechanism for sealing is provided on the outer side of the brake drum, including a brake disc. A connecting disc is fixedly connected to the outer wall of the brake disc away from the brake drum. This invention, by setting a tortuous gap between the fixing ring of the brake drum and the second groove of the brake disc, prevents direct contact between the fixing ring and the inner wall of the groove. Utilizing the centrifugal force generated by the rotation of the brake drum, dust entering the tortuous gap can be quickly thrown out, effectively preventing large particles of impurities from intruding into the brake drum. This reduces the possibility of fine sand and dust entering the brake drum through the annular gap between the brake drum and the brake base plate.

The invention relates to a drum brake (1) for a vehicle, in particular for commercial vehicles, comprising a brake carrier (3), a brake drum (2) rotatable relative to the brake carrier (3) about a drum axis (TA) and having a drum opening (22), which has a circumferentially formed inner friction surface (28), wherein the brake carrier (3) is arranged inside the brake drum (2), and a brake lining arrangement (6), wherein the drum opening (22) is axially conical and widens in the direction of a particle collection unit (24) with which the drum opening (22) is connected, wherein the brake particles (25) generated during a braking process can be moved out of the drum opening (22) under the influence of the centrifugal force occurring during a rotational movement of the brake drum (2).

The invention relates to a vehicle drum brake (1), in particular for commercial vehicles, comprising a brake carrier (5), a drum (3) rotatable relative to the brake carrier (5) about a drum axis (X) with a circumferentially formed inner friction surface (21), wherein the brake carrier (5) and the drum (3) define a drum housing (14), a brake lining assembly (7) with several radially movable lining carriers (11), on each of which a brake lining segment (9) is provided facing the friction surface (21), wherein the drum (3) and the brake lining assembly (7) are arranged on a first side (2) on the brake carrier (5), and the drum brake (1) has a service brake device (32) and a parking brake device (29) for actuating the brake lining assembly (7).It is proposed that the drum brake (1) is characterized in that the drum brake (1) has an actuator (23) with an actuator housing (22) which is arranged on the brake carrier (5) on a second side (8) opposite the first side (2), wherein the actuator housing (22) has the parking brake device (29).

The present invention relates drum brake system, comprising a back plate assembly and a brake drum (1) that is rotatable with respect to the back plate assembly, the back plate assembly comprising: a back plate (2); two brake shoes (3, 3′), the two brake shoes (3, 3′) being pivotably connected to the back plate (2), pivot axes (4, 4′) of the brake shoes (3, 3′) being disposed at or near first ends of the brake shoes (3, 3′); an actuator housing (5) with two pistons (6, 6′), the two pistons (6, 6′) being configured to move outwardly, to press each piston (6, 6′) against one of the brake shoes (3, 3′) to pivot the respective brake shoe (3, 3′) outwardly about its pivot axis (4, 4′), and to press the respective brake shoe (3, 3′) against the brake drum (1) for braking; a return spring (7) extending between the brake shoes (3, 3′) and being connected to both brake shoes (3, 3′), the return spring (7) being configured (7) to exert a retracting spring force that pulls both brake shoes (3, 3′) away from the brake drum; two tension springs (8, 8′) and a holder arrangement (9), inner ends of each of the two tension springs (8, 8′) being connected to the holder arrangement (9), an outer end of the first tension spring (8) of the two tension springs (8, 8′) being connected to a first brake shoe (3) of the two brake shoes (3, 3′) and an outer end of the second tension spring (8′) of the two tension springs (8, 8′) being connected to a second brake shoe (3′) of the two brake shoes (3, 3′).

The invention relates to a linear drive comprising a spindle drive (2), the spindle drive parts (4, 5) of which are threadingly engaged, one of the spindle drive parts (4) being mounted for longitudinal movement along a drive axis (10) and having a stroke part (11) for executing a stroke. The drum brake (18) is released when a rotationally driven spindle drive part (5) is rotationally driven and is closed when the stroke part (11) is under external load. The drum brake (18) is provided with a plurality of brake shoes (24) and a brake drum (21) having a brake surface (23) for the brake shoes (24). A release actuating element (26) and a closing actuating element (27) are provided, which actuate the brake shoe (24) in opposite directions.

A drum brake assembly that includes a brake drum, first and second brake shoes, a cam shaft, a first tappet, a second tappet, and a wear adjuster mechanism. The wear adjuster mechanism has a cross shaft and a sensor. The sensor is configured to detect rotation of the cross shaft about a longitudinal axis to monitor wear of the first and second brake shoes and a braking surface of the brake drum.

The utility model discloses a kind of stability promotion's automobile drum brake pad, including bottom plate, the outer circular surface of the bottom plate is rotatably installed with brake drum, the inner side surface of the brake drum is equipped with long recess, the middle position of one side of the bottom plate is fixedly connected with fixed block, the one side of the fixed block is fixedly connected with connecting rod, one end of the connecting rod is fixedly connected with support rod, the both ends of the support rod are hinged with arc plate by hinging seat, the one side surface of the arc plate is fixedly connected with fixed ring, the one side of the fixed ring is fixedly connected with tension spring, the other side surface of the arc plate is equipped with fixed groove, brake pad is fixedly installed in the inside of the fixed groove, the inside of the brake pad is fixedly embedded with framework plate, the one side surface of the framework plate is fixedly connected with long protrusion, can increase structural strength, can enhance braking effect after surface wear, improve safety stability, facilitate combined use.

A brake drum for a drum brake of a motor vehicle, the brake drum having:a ring section extending concentrically about a rotation axis; anda circular wall section extending at an angle to the rotation axis;wherein in the brake drum has at least one portion that deviates from at least one of:a) a rotation symmetric configuration of the brake drum with respect to the rotation axis;b) a material comprised by at least one other portion of the brake drum.

An electro-mechanical drum brake may include a back plate, a drum disposed on one side of the back plate, a first brake shoe and a second brake shoe rotatably coupled on one surface of the back plate, a pressing member configured to press one sides of the first brake shoe and the second brake shoe so that the first brake shoe and the second brake shoe advance toward or retreat from an inner circumferential surface of the drum, an actuator configured to provide a driving force so that the pressing member presses the first and second brake shoes, and a sensor positioned between the other sides of the first and second brake shoes and formed to measure loads of the first and second brake shoes applied in a first direction tangent to a rotational radius of the drum.

An external drum brake anti-falling device includes a carrier having an accommodating chamber and a main shaft crossingly arranged in the accommodating chamber for supporting a rotating drum to autorotate, wherein the rotating drum has a life belt coiled thereon, a brake unit arranged at an end thereof, and a drum brake module, which includes a base, mounted in the accommodating chamber, and a passive ring, mounted on the base. The base has a through hole axially and penetratingly arranged thereon and a slit communicating an inside and outside of said through hole. The wall surface of the through hole is a first ring surface. An outer diameter of the passive ring is a second ring surface. The passive ring has internally ratchet teeth arranged therein. when the life belt drives the brake unit to be engaged with the ratchet teeth, thereby buffering the rotating drum and the life belt.

A drum brake (1), in particular for a utility vehicle, has a brake drum (2) which is rotatably mounted about an axis of rotation (D) and multiple brake shoes (3) which are mounted in a receiving space of the brake drum (2) and each have a friction lining carrier (32) and a friction lining (31) arranged thereon, wherein the brake shoes (3) can be pressed, radially with respect to an axis of rotation (D) of the brake drum (2), against a casing inner surface, in the form of a friction surface, of the brake drum (2), a brake cylinder arrangement (4) rotationally fixedly arranged on an anchor plate (8) in the receiving space of the brake drum (2) for actuating the brake shoes (3), a pressure wedge (33) which is arranged on a side of the friction lining carrier (32) facing away from the friction lining (31) and rests on a wedge mechanism that can be shifted parallel to the axis of rotation (D) of the brake drum (2), wherein the wedge mechanism can be shifted from a non-braking position into a braking position by shifting a service brake piston (42) of the brake cylinder arrangement (4) parallel to the axis of rotation (D) of the brake drum (2), wherein the brake shoes (3) can be adjusted by means of an adjusting device (270) which has a threaded sleeve (71, 171) or a toothed ring (271), wherein the adjusting device (270) has an electromotive drive (18) which is coupled to the threaded sleeve (71, 171) or the toothed ring (271), at least one sensor detecting a clearance between at least one of the brake shoes (3) and the casing inner surface of the brake drum (2), as well as an adjustment control unit (ECU), with which a target clearance that is variable according to the operating state of the drum brake (1) can be adjusted. The invention also relates to a method for adjusting multiple brake shoes (3) of a drum brake (1), which brake shoes are mounted in a receiving space of a brake drum (2).

The utility model relates to the technical field of drum brakes, and discloses a drum brake for an automobile, which comprises a brake bottom plate and a brake drum, brake shoes are rotatably mounted on the left side and the right side of the front end of the brake bottom plate, a hub is rotatably mounted at the axis of the brake bottom plate, and the brake drum is fixed outside the hub through bolts; the inner ring is fixed to the inner axis of the brake drum through a screw, and fan blades evenly distributed in the annular direction are installed on the outer portion of the inner ring; the heat conducting plate is fixed to the inner side of the brake shoe through screws, and heat conducting fins are integrally formed on the inner side of the heat conducting plate; the second air guide groove is annularly formed in the side, close to the fan blades, of the outer portion of the brake drum, and the first air guide groove is formed in one side of the lower end face of the interior of the brake bottom plate. The heat conduction fins are arranged on the inner sides of the brake shoes and matched with the fan blades on the inner side of the brake drum, the fan blades rotate to generate airflow so as to dissipate heat of the brake shoes, and the brake performance is prevented from being affected by high temperature.

The present application relates to the technical field of brake pad production, and particularly relates to a drum brake pad cylinder die pressing material discharging device and method, which presses down twice, first presses the partition plate down on the partition plate drag strip, takes out the partition plate, then presses the brake pad down on the partition plate drag strip, and then takes out the brake pad, so that the partition plate and the brake pad are separated at the pressing die, the partition plate drag strip exits the material discharging channel, the partition plate and the brake pad are clamped respectively, the equipment structure is optimized, and the moving track of the mechanical hand is reduced.

The utility model provides a drum brake electronic parking test device, which belongs to the technical field of detection equipment, and comprises a test board, a simulation drum structure and an electronic parking module, the test board is provided with a mounting position, and the mounting position is used for fixing a tested piece; the simulation drum structure is arranged on the test bench, surrounds the radial periphery of the tested piece, and is in contact with a brake shoe of the tested piece; the simulation drum structure is connected with a pressure sensor; the electronic parking module is electrically connected with the tested piece and used for controlling parking braking of the tested piece. The drum brake electronic parking test device provided by the utility model is in direct communication connection with the electronic control unit of the tested piece through the integrated electronic parking module, simulates an electronic parking trigger signal of a real vehicle, and directly detects the contact pressure between the brake shoe and the simulation drum through the pressure sensor. The problems of input and execution of electronic control signals are solved, and the testing device can accurately reproduce the working condition of electronic parking braking.

The present invention relates to an electromechanical drum brake (10) for automobiles. [Solution] This drum brake (10) has two brake shoes (18) and an actuator (26) positioned between these brake shoes (18), and pressure can be applied to the brake shoes (18) via the actuator (26), thereby causing the brake shoes (18) to be pressed against the drum (14) for braking. In this case, at least one means (42, 72, 86) is provided that is in conjunction with the actuator (26) and each of the brake shoes (18), thereby allowing the actuator (26) to move in a load-reducing direction (64) to apply a tensile force to the brake shoes (18).

The invention relates to a drum brake assembly for braking a wheel a motor vehicle that rotates about a rotation axis,with:a brake drum having a back wall section extending at an angle to the rotation axis and a circumferential wall section,at least one brake shoe assembly,wherein each of the brake shoe assembly and brake drum has a contact portion for contacting the respective other of the brake shoe assembly and brake drum to generate a braking force; andwherein the brake shoe assembly is configured to be coupled to a rotatable axle component of the motor vehicle to rotate relative to the brake drum about the rotation axis.

The utility model provides a novel electric car driving heavy disc brake assembly, and belongs to the technical field of disc brake assemblies. The novel electric car driving heavy disc brake assembly comprises a supporting structure and a disc brake structure. The supporting structure comprises a rear axle and a connecting piece, and the connecting piece is installed at the end of the rear axle. The disc brake structure comprises a hub, a disc brake piece and disc brake calipers, protrusions are formed on the surface of the hub in the circumferential direction, first bolts movably penetrate through the periphery of the hub, the disc brake piece is installed on the protrusions, a bearing is embedded in the hub, the disc brake calipers are installed on the connecting piece, and the disc brake calipers are installed on the connecting piece. The disc brake calipers are connected to the two sides of the disc brake piece in a clamped mode. Compared with a drum brake and an existing disc brake, the disc brake does not need to be repeatedly adjusted in the long-time use process, meanwhile, torsion for coping with heavy objects is improved through the special design, the disc brake can be more stable and firmer in the use process, the application range is wider, and use is more convenient.

A drum brake is provided which has a brake shoe holding mechanism that improves the tracking capability with respect to the movement of a brake shoe. A shoe holding pin of the brake shoe holding mechanism provided in the drum brake comprises a base section engaging with a back plate, a shaft section extending continuously from the base section, and a head section of the distal end extending continuously from an axial end section of the shaft section. The head section of the distal end engages a locking section provided in a shoe holding area. A projecting section (contact section) against which the locking section rests is provided at a position spaced from the head section of the distal end in the direction of the shaft section.The brake shoe holding mechanism makes it possible to improve the tracking capability with regard to the movement of the first and second brake shoes.