CN215521736U - Hydraulic disc brake - Google Patents

Abstract

A hydraulic disc brake comprising a support housing, a friction device and an adjustment device; the supporting shell is provided with a plurality of slotted holes which are uniformly arranged; the friction devices are correspondingly arranged in the slotted holes, each friction device comprises a pair of friction plate assemblies which are arranged in the middle of the guide rod in a sliding mode, and the friction plate assemblies are respectively positioned on two sides of the brake disc and have gaps; the guide rod is detachably inserted in the support shell; the piston main body is movably arranged in the supporting shell, one end of the piston main body is contacted with the friction plate assembly after moving, the other end of the piston main body is elastically pressed on the piston shell, a closed inner cavity is formed between the outer side of the middle of the piston main body and the piston shell, and hydraulic oil enters the inner cavity to drive the piston main body to move. This hydraulic disc brake, simple structure not only drives a plurality of friction discs through hydraulic pressure and brakies simultaneously, realizes bigger brake torque, and friction disc quick assembly disassembly is changed the maintenance more convenient moreover to effectively compensate friction disc wearing and tearing volume, make the braking response more effective, last.

Description

Hydraulic disc brake

Technical Field

The utility model relates to the field of engineering machinery braking, in particular to a hydraulic disc brake.

Background

The braking device is one of important structures of the vehicle, and the braking quality directly influences the running of the vehicle and the safety of a driver;

in engineering vehicle braking devices such as loaders and forklifts, a common braking device is a hydraulic clamp which has the advantages of simple structure, low cost and the like, a pair of friction plates are driven by hydraulic pressure to clamp a brake disc to realize braking, and the structure has the advantages of large loss, short service life, frequent friction plate replacement and insufficient braking force because the friction plates have small area and small working area of relative friction, and if the large braking force is realized, the braking pressure of the system needs to be improved, so the service life of a rectangular ring of the hydraulic clamp is reduced and the cost of a hydraulic system of the whole vehicle is improved;

some adopt the wet-type braking way, mainly adopt a plurality of friction discs to make up each other, can pass the minor oil hydraulic pressure, realize the bigger brake force, it is even to have the friction disc to abrade, advantage with long performance life, but its friction disc is expensive on the one hand, on the other hand it is very high to the lubricating oil, must increase the special antiwear agent in cooling the lubricating oil, otherwise will produce the brake noise, and the closed design of the wet brake, cause the brake radiating effect to be poor, must add the forced cooling oil circuit to cool down the friction disc, make the requirement to the brake pipeline of the brake higher too;

in addition, when the friction plate is worn after long-term use, the thickness of the friction plate is correspondingly reduced, the braking effect of the driving friction plate is reduced, namely the reduced friction plate cannot be quickly and effectively compensated, so that the response of the friction plate to the brake disc is slow and cannot be continued, and the use of the braking device in the existing engineering machinery is also influenced.

Disclosure of Invention

The utility model provides a hydraulic disc brake which is simple in structure, not only drives a plurality of friction plates to brake simultaneously through hydraulic pressure, reduces the pressure of single-plate brake and realizes larger brake torque, but also has the advantages of quick assembly and disassembly of the friction plates, more convenient replacement and maintenance, effectively reduced cost, and effectively compensated abrasion loss of the friction plates, so that the brake response is more effective and continuous;

to achieve the above object, the present hydraulic disc brake comprises a housing assembly, a friction device and an adjustment device;

the housing assembly comprises a support housing, a piston body and a piston housing;

the periphery of the middle part of the supporting shell is provided with a plurality of uniformly arranged slotted holes, and the end side of the supporting shell is detachably provided with a piston shell;

the friction devices are in multiple groups and are correspondingly arranged in the multiple slotted holes, each group of friction device comprises a pair of friction plate assemblies which are arranged in the middle of the guide rod in a sliding manner, the pair of friction plate assemblies are respectively positioned on two sides of the brake disc and have gaps, and the brake disc is circumferentially limited and axially movably arranged on the hub;

the guide rod is detachably inserted in the support shell;

the piston main body is movably arranged in the supporting shell, one end of the piston main body is in contact with the friction plate assembly after moving, the other end of the piston main body is elastically pressed between the upper side and the middle outer side of the piston shell and the piston shell through the adjusting device to form a closed inner cavity, and external hydraulic oil enters the inner cavity and drives the piston main body to move.

Furthermore, the adjusting devices are multiple and are uniformly arranged on the circumference, and each group of adjusting devices comprises at least one group of elastic components;

each group of elastic components comprises a guide screw rod and a spring, and one end of the guide screw rod penetrates through the piston main body and is installed on the piston shell in a threaded mode;

the spring is sleeved in the middle of the guide screw, one end of the spring is contacted with the piston main body, and the other end of the spring is contacted with the end face of the guide screw.

Furthermore, each group of adjusting devices also comprises an adjusting component, and the adjusting component comprises a limiting rod and a limiting ring;

the piston shell is provided with a bushing, the outer side of the limiting ring is in interference fit with the bushing, and the inner ring is in clearance fit with the limiting rod;

one end of the limiting rod is fixed on the supporting shell, the diameter of the other end of the limiting rod is larger than the inner diameter of the limiting ring and smaller than the inner diameter of the bushing, and a gap is reserved between the limiting rod and the end face of the limiting ring.

Furthermore, a strip groove which is arranged along the axis of the limiting ring and is communicated with the inner wall is arranged on the outer side of the limiting ring;

the clearance between the end face of the limiting rod and the end face of the limiting ring is 2-3 mm.

Furthermore, pin holes are respectively formed in the support shell and located on two sides of the slotted hole, and one end of the guide rod penetrates through the pin holes and is limited and fixed through a limiting pin.

Furthermore, each friction plate component comprises a cooling fin provided with a plurality of heat dissipation holes and a friction plate arranged on the cooling fin;

the cooling fins are provided with waist-shaped holes for the guide rods to pass through, and the brake discs are positioned between the adjacent friction plates;

the end side of the piston main body, which is close to the friction plate assembly, is provided with a clamping groove, and the bottom surface of the clamping groove is provided with a plurality of rectangular grooves which are arranged at intervals;

the radiating fin is positioned in the clamping groove.

Further, an oil inlet and an air outlet which are communicated with the inner cavity are respectively arranged on the piston shell, the oil inlet is connected with external hydraulic oil through a sealing plug, and an air release nozzle is arranged on the air outlet.

Further, the outside of piston main part is equipped with the breach that the weight reduction was used, the week side of piston housing is equipped with the boss that a plurality of circumferences set up, and every boss and support housing outside phase-match to pass reciprocal anchorage through locking screw.

Furthermore, the middle part of the brake disc is of a spline groove structure and is connected with the spline structure on the outer side of the hub in a matched mode.

Compared with the prior art, the hydraulic disc brake has the following advantages:

(1) according to the utility model, as the friction devices are in multiple groups and are correspondingly arranged in the multiple slotted holes, the piston main body drives the multiple groups of friction devices to brake the brake disc under the action of hydraulic oil, so that the brake stress of the brake disc is more uniform, the pressure of single-disc braking is reduced, and the braking torque is increased; the friction plate assembly is detachably inserted through the guide rod, and when the friction plate needs to be replaced, the guide rod can be directly pulled out, so that the friction plate can be quickly detached without detaching the brake assembly, the possibility that related parts are damaged during detachment is avoided, and the replacement and maintenance are more convenient;

(2) according to the utility model, the friction plate is fixedly arranged on the heat radiating fin, the end of the piston shell, which is close to the friction plate assembly, is provided with the clamping groove for clamping the friction plate assembly, and the bottom surface of the clamping groove is provided with the plurality of rectangular grooves which are arranged at intervals, so that the heat of the friction plate assembly is radiated through the groove holes, and when the piston main body drives the friction plate assembly to brake, the heat radiation effect is better, and the service life of the friction plate is longer;

(3) because the adjusting assembly is arranged, when the clearance between the friction plate and the brake disc is smaller than the preset adjusting clearance, the piston main body can completely return under the action of the elastic assembly when moving for braking; when the abrasion loss of the friction plate is increased and is larger than the preset adjusting gap, the bushing drives the limiting ring to move on the limiting rod under the strong pressure of hydraulic oil, the bushing is enabled to move relative to the limiting ring continuously through the limiting of the limiting rod, the abrasion loss of the friction plate is compensated through the displacement, and when the brake is released, the limiting ring returns to the initial state, the brake gap is guaranteed to be the preset gap all the time, so that the abrasion loss of the friction plate is compensated through the relative displacement between the piston main body and the limiting ring, the abrasion loss of the friction plate is effectively compensated, and the brake response is more effective and continuous;

(4) according to the utility model, the strip-shaped groove is arranged on the limiting ring, so that the interference force of assembly between the limiting ring and the bushing is reduced through the strip-shaped groove, the limiting ring is conveniently arranged in the bushing under the condition of not influencing the interference fit, and the overlarge hydraulic oil pressure is avoided when the bushing moves relative to the limiting ring.

Drawings

FIG. 1 is an overall front view of the present invention;

FIG. 2 is a schematic view of the friction device 3 of the present invention;

FIG. 3 is a schematic view of the support housing 2 of the present invention;

FIG. 4 is a schematic view of the piston body 4 of the present invention;

FIG. 5 is a schematic view of the adjusting device of the present invention and one side of the piston housing 5;

FIG. 6 is a schematic view of the adjusting device of the present invention and the other side of the piston housing 5;

FIG. 7 is a schematic view of a stop collar 72 of the present invention;

FIG. 8 is a schematic view of a stop rod 71 of the present invention;

FIG. 9 is a schematic view of a brake rotor 12 of the present invention;

FIG. 10 is a schematic view of the hub 11 of the present invention;

in the figure: 11. the brake disc comprises a hub, 12, a brake disc, 2, a support shell, 21, a groove hole, 22, a pin hole, 3, a friction device, 31, a friction plate, 32, a radiating fin, 33, a guide rod, 34, a limiting pin, 35, a kidney-shaped hole, 36, a radiating hole, 4, a piston main body, 41, a lining, 42, a through hole, 43, a notch, 44, a clamping groove, 5, a piston shell, 51, an oil inlet hole, 52, a sealing plug, 53, an air outlet hole, 54, an air outlet nozzle, 55, a boss, 61, a guide screw rod, 62, a spring, 71, a limiting rod, 72, a limiting ring, 73 and a strip-shaped groove.

Detailed Description

The utility model will be further explained with reference to the drawings.

As shown in fig. 1, 2, 3, 4, the present hydraulic disc brake comprises a housing assembly, a friction device 3 and an adjustment device;

the housing assembly comprises a support housing 2, a piston body 4 and a piston housing 5;

the middle peripheral side of the supporting shell 2 is provided with a plurality of uniformly arranged slotted holes 21, and the end side is provided with a piston shell 5 in a detachable way;

the friction devices 3 are in multiple groups and are correspondingly arranged in the slotted holes 21, each group of friction devices 3 comprises a pair of friction plate assemblies which are arranged in the middle of the guide rod 33 in a sliding manner, the pair of friction plate assemblies are respectively positioned on two sides of the brake disc 12 and have gaps, and the brake disc 12 is circumferentially limited and axially arranged on the hub 11 in a moving manner;

the guide rod 33 is detachably inserted on the support shell 2;

the piston main body 4 is movably arranged in the supporting shell 2, one end of the piston main body is contacted with the friction plate assembly after moving, the other end of the piston main body is elastically pressed on the piston shell 5 through an adjusting device, a closed inner cavity is formed between the outer side of the middle part of the piston main body and the piston shell 5, and external hydraulic oil enters the inner cavity and drives the piston main body 4 to move;

as shown in fig. 5, 7 and 8, further, the adjusting devices are multiple and are uniformly arranged circumferentially, and each group of adjusting devices comprises at least one group of elastic components;

each group of elastic components comprises a guide screw rod 61 and a spring 62, and one end of the guide screw rod 61 passes through the through hole 42 on the piston main body 4 and then is installed on the piston shell 5 in a threaded mode;

the spring 62 is sleeved in the middle of the guide screw 61, one end of the spring is contacted with the piston main body 4, and the other end of the spring is contacted with the end face of the guide screw 61;

further, each group of adjusting devices also comprises an adjusting component, and the adjusting component comprises a limiting rod 71 and a limiting ring 72;

the piston shell 5 is provided with a bushing 41, the outer side of the limiting ring 72 is in interference fit with the bushing 41, and the inner ring is in clearance fit with the limiting rod 71;

one end of the limiting rod 71 is fixed on the support shell 2, the diameter of the other end of the limiting rod is larger than the inner diameter of the limiting ring 72 and smaller than the inner diameter of the bushing 41, and a gap is reserved between the limiting rod and the end face of the limiting ring 72;

further, a strip-shaped groove 73 which is arranged along the axis of the limiting ring 72 and is communicated with the inner wall is arranged on the outer side of the limiting ring;

the clearance between the end surface of the limiting rod 71 and the end surface of the limiting ring 72 is 2-3 mm;

as shown in fig. 2, further, pin holes 22 are respectively formed in the support housing 2 and located at two sides of the slot 21, and one end of the guide rod 33 is inserted into the pin hole 22 and is fixed by a limit pin 34;

further, each friction plate assembly includes a heat sink 32 provided with a plurality of heat dissipation holes 36 and a friction plate 31 mounted on the heat sink 32;

the radiating fins 32 are provided with kidney-shaped holes 35 for the guide rods 33 to pass through, and the brake discs 12 are positioned between the adjacent friction plates 31;

a clamping groove 44 is formed in the end side, close to the friction plate assembly, of the piston main body 4, and a plurality of rectangular grooves arranged at intervals are formed in the bottom surface of the clamping groove 44;

the heat sink 32 is located within the card slot 44;

as shown in fig. 6, further, the piston housing 5 is respectively provided with an oil inlet 51 and an air outlet 53, the exterior of which is communicated with the inner cavity, the oil inlet 51 is connected with external hydraulic oil through a sealing plug 52, and the air outlet 53 is provided with an air outlet 54;

as shown in fig. 2 and 4, further, the outer side of the piston body 4 is provided with a gap 43 for reducing weight, the circumferential side of the piston housing 5 is provided with a plurality of circumferentially arranged bosses 55, each boss 55 is matched with the outer side of the support housing 2 and fixed to each other by a locking screw rod;

as shown in fig. 9 and 10, further, the brake disc 12 is disposed between the hub 11 and the wheel hub in a circumferentially limited and axially movable manner; preferably, the brake disc 12 is provided with an inner tooth groove, the hub 11 is provided with outer teeth, and the outer teeth are circumferentially limited and axially movably arranged in the inner tooth groove;

when the hydraulic disc brake is used, the support shell 2 or the piston shell 5 is fixed on the outer side of an axle, a plurality of groups of friction devices 3 are detachably arranged in corresponding slotted holes 21, external hydraulic oil enters an inner cavity between the piston main body 4 and the piston shell 5, the piston main body 4 drives the friction plate assemblies to move under the action of the hydraulic oil, so that the pair of friction plate assemblies brake the brake disc 12, after braking is completed, the piston main body 4 rebounds under the action of the elastic assembly, the pair of friction plate assemblies stop braking the brake disc 12, and when the friction plate 31 is abraded, the abrasion loss of the friction plate 31 is compensated through the adjusting assembly;

the method specifically comprises the following steps: because the friction devices 3 are in multiple groups and are correspondingly arranged in the slotted holes 21, preferably, the friction devices 3 are in four groups, and a pair of friction plate assemblies are respectively positioned on two sides of the brake disc 12 and have gaps, on one hand, the friction devices 3 are uniformly distributed through the circumferences of the multiple groups of friction devices 3, so that the pair of friction plates 31 can brake the brake disc 12 more uniformly and increase the braking torque, on the other hand, the pair of friction plates 31 are inserted through the guide rod 33, preferably, the limiting pin 34 is arranged at the other end of the guide rod 33, when the friction plates 31 need to be replaced, the lower limiting pin 34 is directly disassembled, the guide rod 33 is drawn out, and the friction plates 31 can be taken down from the support shell 2, so that the friction plates 31 can be quickly disassembled without disassembling the brake assembly, the possibility that related parts are damaged during disassembly is avoided, and the replacement and maintenance are more convenient;

because the piston main body 4 is movably arranged in the supporting shell 2, one end of the piston main body is contacted with the friction plate assembly after moving, the other end of the piston main body is elastically pressed on the piston shell 5 through the adjusting device, a closed inner cavity is formed between the outer side of the middle part of the piston shell 5 and the piston shell 5, when external hydraulic oil enters the inner cavity from an oil inlet hole 51 on the piston shell 5, the piston main body 4 extrudes the friction plate assembly, a pair of friction plate assemblies is contacted with the brake disc 12, namely, a plurality of friction devices 3 act on the brake disc 12 at the same time, the simultaneous braking of a plurality of friction plates 31 is realized, and the pressure of single-plate braking is reduced; in addition, the support shell 2 is provided with an air outlet 53, when hydraulic oil enters the inner cavity, air in the inner cavity is discharged through the air outlet 53, and the instability of hydraulic action is avoided;

on one hand, the friction plate 31 is fixedly arranged on the radiating fins 32, on the other hand, one end, close to the friction plate assembly, of the piston shell 5 is provided with clamping grooves 44 for clamping the friction plate assembly, and the bottom surface of each clamping groove 44 is provided with a plurality of rectangular grooves which are arranged at intervals, so that the friction plate assembly is radiated through the slotted holes 21, and when the piston main body 4 drives the friction plate 31 to brake, the friction plate assembly is also radiated through the rectangular grooves, so that the device has a better radiating effect, and the service life of the friction plate 31 is longer;

preferably, the adjusting devices are four groups, and each group of adjusting devices comprises a group of adjusting components and two groups of elastic components;

the elastic component comprises a guide screw rod 61 arranged on the piston shell 5 and a spring 62 sleeved on the guide screw rod 61, when the piston main body 4 moves under the action of hydraulic oil to brake, the spring 62 is compressed by the peripheral side of the piston main body 4, and when the brake is stopped, the piston main body 4 reversely moves to an initial position under the action of the elastic force of the spring 62;

due to the arrangement of the adjusting assembly, the outer side of the limiting ring 72 is in interference fit with the bushing 41, the inner ring is in clearance fit with the limiting rod 71, the bushing 41 on the piston main body 4 can drive the limiting ring 72 to move on the limiting rod 71, a 2-3mm clearance exists between the end face of the limiting rod 71 and the end face of the limiting ring 72, namely, an automatic adjusting clearance is preset, and when the clearance between the friction plate 31 and the brake disc 12 is smaller than the preset adjusting clearance, the piston main body 4 completely returns to the initial position when the piston main body 4 moves for braking each time; along with the increase of the abrasion loss of the friction plate 31, the clearance between the friction plate 31 and the brake disc 12 gradually increases, when the clearance is larger than the preset adjustment clearance, the bushing 41 on the piston main body 4 drives the limit ring 72 to move on the limit rod 71 under the strong pressure of hydraulic oil in the inner cavity, namely the limit ring 72 limits through the limit rod 71, so that the bushing 41 (the piston main body 4) continuously moves relative to the limit ring 72, the abrasion loss of the friction plate 31 is compensated by the displacement, when the brake is released, because the outer side of the limit ring 72 is in interference fit with the bushing 41 on the piston main body 4, friction force exists between the outer side of the limit ring 72 and the bushing 41 on the piston main body 4, the friction force is larger than the residual pressure in the system when the brake is released, the limit ring 72 returns to the initial state, but the relative position of the piston main body 4 and the limit ring 72 after the movement is unchanged, the friction force cannot return to the initial position, so as to ensure that the brake clearance is always 2-3mm of the preset clearance, therefore, the abrasion loss of the friction plate 31 is compensated by the relative displacement between the piston main body 4 and the limit ring 72, the abrasion loss of the friction plate 31 is effectively compensated, so that the braking response is more effective and continuous; the bar-shaped groove 73 can be formed in the limiting ring 72, interference force between the limiting ring 72 and the bushing 41 is reduced through the bar-shaped groove 73, the limiting ring 72 can be conveniently installed in the bushing 41 under the condition that interference fit is not influenced, and overlarge hydraulic oil pressure is avoided when the bushing 41 moves relative to the limiting ring 72;

in addition, the middle part of the brake disc 12 is of a spline groove structure, is in matched connection with the spline structure on the outer side of the hub 11, and rotates with the hub 11 to drive torque, namely, is circumferentially limited and axially moved, when hydraulic oil enters the inner cavity and the piston main body 4 pushes the friction plate 31 on one side to move to be in contact with the brake disc 12, the brake disc 12 moves towards the wheel end along the spline under the action force of the friction plate 31 and is in contact with the friction plate 31 on the other side, and the pair of friction plates 31 tightly hold the brake disc 12, so that the braking effect is realized; when the hydraulic oil pressure is relieved, the piston main body 4 retracts under the action of the elastic component, the friction plate 31 on one side of the piston main body 4 is separated from the brake disc 12, the brake disc 12 moves axially by means of rotation inertia and is separated from the friction plate 31 on the other side, a certain gap is reserved between the brake disc 12 and the pair of friction plates 31, the braking is more stable and reliable, and the service life is long.

This hydraulic disc brake, simple structure not only drives multiunit friction disc subassembly through hydraulic pressure and brakies 12 simultaneously to the brake disc, reduces the pressure of monolithic braking, realizes bigger braking torque, and friction disc 31 quick assembly disassembly is changed the maintenance more convenient moreover, effective reduce cost to effectively compensate friction disc 31 wearing and tearing volume, make the braking response more effective, last.

Claims (9)

1. Hydraulic disc brake, characterized by comprising a housing assembly, friction means (3) and adjustment means;

the housing assembly comprises a support housing (2), a piston body (4) and a piston housing (5);

a plurality of slotted holes (21) which are uniformly arranged are arranged on the periphery of the middle part of the supporting shell (2), and a piston shell (5) is arranged on the end side in a detachable manner;

the friction devices (3) are in multiple groups and are correspondingly arranged in the slotted holes (21), each group of friction device (3) comprises a pair of friction plate assemblies which are arranged in the middle of the guide rod (33) in a sliding mode, the pair of friction plate assemblies are respectively positioned on two sides of the brake disc (12) and have gaps, and the brake disc (12) is circumferentially limited and axially movably arranged on the hub (11);

the guide rod (33) is detachably inserted on the support shell (2);

the piston main body (4) is movably arranged in the supporting shell (2), one end of the piston main body is in contact with the friction plate assembly after moving, the other end of the piston main body is elastically pressed between the outer sides of the upper part and the middle part of the piston shell (5) and the piston shell (5) through an adjusting device to form a closed inner cavity, and external hydraulic oil enters the inner cavity and drives the piston main body (4) to move.

2. The hydraulic disc brake of claim 1, wherein the adjustment devices are plural and evenly circumferentially arranged, each set of adjustment devices comprising at least one set of resilient members;

each group of elastic components comprises a guide screw rod (61) and a spring (62), and one end of the guide screw rod (61) penetrates through the piston main body (4) and is installed on the piston shell (5) in a threaded mode;

the spring (62) is sleeved in the middle of the guide screw rod (61), one end of the spring is contacted with the piston main body (4), and the other end of the spring is contacted with the end face of the guide screw rod (61).

3. Hydraulic disc brake according to claim 2, in which each set of adjustment means further comprises an adjustment assembly comprising a limit rod (71) and a limit ring (72);

the piston shell (5) is provided with a bushing (41), the outer side of the limiting ring (72) is in interference fit with the bushing (41), and the inner ring is in clearance fit with the limiting rod (71);

one end of the limiting rod (71) is fixed on the supporting shell (2), the diameter of the other end of the limiting rod is larger than the inner diameter of the limiting ring (72) and smaller than the inner diameter of the bushing (41), and a gap is reserved between the limiting rod and the end face of the limiting ring (72).

4. A hydraulic disc brake according to claim 3, characterized in that the outer side of the retainer ring (72) is provided with a strip-shaped groove (73) arranged along its axis and communicating with the inner wall;

the clearance between the end surface of the limiting rod (71) and the end surface of the limiting ring (72) is 2-3 mm.

5. The hydraulic disc brake of any one of claims 1 to 4, characterized in that the support housing (2) is provided with pin holes (22) on both sides of the slot (21), and one end of the guide rod (33) is inserted into the pin hole (22) and is fixed in a limited manner by a limit pin (34).

6. A hydraulic disc brake according to any one of claims 1 to 4, characterised in that each friction disc assembly comprises a heat sink (32) provided with a plurality of heat dissipation apertures (36) and a friction disc (31) mounted on the heat sink (32);

waist-shaped holes (35) for the guide rods (33) to pass through are formed in the radiating fins (32), and the brake disc (12) is located between the adjacent friction plates (31);

a clamping groove (44) is formed in the end side, close to the friction plate assembly, of the piston main body (4), and a plurality of rectangular grooves arranged at intervals are formed in the bottom surface of the clamping groove (44);

the heat sink (32) is located within the card slot (44).

7. The hydraulic disc brake of claim 6, characterized in that the piston housing (5) is provided with an oil inlet (51) and an air outlet (53) respectively communicating with the inner cavity, the oil inlet (51) is connected with external hydraulic oil through a sealing plug (52), and the air outlet (53) is provided with an air release nozzle (54).

8. Hydraulic disc brake according to claim 7, characterised in that the outside of the piston body (4) is provided with a lightening cut-out (43), and the periphery of the piston housing (5) is provided with a plurality of circumferentially arranged bosses (55), each boss (55) matching the outside of the support housing (2) and being fixed to each other by a locking screw passing through it.

9. The hydraulic disc brake of claim 7, characterized in that the brake disc (12) has a splined central section which is in mating connection with an external splined section of the hub (11).

Images