Heavy-duty truck water-cooled disc brakes

Abstract

This utility model discloses a water-cooled disc brake for heavy-duty trucks, comprising an axle shaft, an axle head at the end of the axle shaft, a brake disc fixed at the port of the axle head, and an annular hollow housing fixed on the axle shaft. Inside the housing, annular piston blocks are positioned on opposite sides of the brake disc, and annular friction discs are symmetrically arranged on the piston blocks on both sides. There is a play between the friction discs and the brake disc. This utility model improves the structure of the disc brake, allowing the friction discs to fully contact both sides of the brake disc, thereby increasing the friction area and resulting in faster braking response, stronger braking force, and smoother braking. The water channels within the friction discs achieve water cooling, preventing overheating and ensuring braking performance, while also improving its resistance to heat fade. Furthermore, the improved brake has a simple structure, strong braking effect, and is lighter than traditional drum brakes, making it suitable for braking operations on heavy-duty trucks.

Description

Technical Field

[0001] This utility model relates to the field of vibration isolation platform technology, specifically to a water-cooled disc brake for heavy-duty trucks. Background Technology

[0002] The automotive brake, commonly known as the braking system, is a crucial component for decelerating and stopping a vehicle during movement. Its operational stability is a vital aspect of ensuring safe vehicle operation. Currently, small vehicles generally use disc brakes, while heavy trucks typically use drum brakes. Although their structures differ, their principles are similar: both use a drive mechanism to control the friction between the friction disc and the brake disc to achieve vehicle stopping. During braking, the friction disc needs to frequently rub against the brake disc, causing the temperature of both discs to rise continuously. Brake discs are generally equipped with heat dissipation vents to improve their cooling efficiency, while friction discs lack effective heat dissipation capabilities. If the friction disc temperature becomes too high, its friction performance will decrease, braking distance will increase, and in severe cases, brake failure may occur, seriously affecting driving safety. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of the existing technology by providing a water-cooled disc brake for heavy-duty trucks, thereby solving the aforementioned technical problems.

[0004] The present invention adopts the following technical solution: a water-cooled disc brake for heavy trucks, including an axle fixed on a frame, a rotatable axle head at the end of the axle, a wheel hub mounted on a mounting ring on the axle head, a brake disc fixed at the port of the axle head where it is inserted into the axle head, the brake disc rotating with the axle head, an annular hollow housing fixed on the axle head at the position corresponding to the brake disc, the brake disc located in the middle of the housing, annular piston blocks arranged on both sides of the housing corresponding to the brake disc, annular friction discs arranged on the side of the piston blocks facing the brake disc, and a movable gap between the friction discs and the brake disc;

[0005] The housing is connected to the vehicle's air tank via a pipeline. Gas from the air tank enters the housing through the pipeline and drives the piston block to move left and right inside the housing. Several clamping springs are evenly distributed circumferentially on the side walls of the left and right sides inside the housing. One end of the clamping spring is fixedly connected to the side wall of the piston block, and the other end of the clamping spring is fixedly connected to the side wall of the housing.

[0006] Hollow water channels are provided inside the friction discs on both sides. The friction discs have water inlets and outlets at their outer edges, and the water inlets and outlets are respectively connected to the vehicle water tank via hoses.

[0007] Furthermore, the piston block has a circular groove in the middle of the side facing the brake disc, the diameter of the groove is larger than the diameter of the inner hole of the piston block, and the two sides of the inner hole of the housing are respectively provided with annular inner walls at the positions corresponding to the piston block. The brake disc and the friction disc are located between the two annular inner walls. The two annular inner walls are provided with annular baffles at the ends near the friction disc. The annular baffles are located in the groove, and there is a space for movement between the annular baffles and the bottom wall of the groove.

[0008] The outer wall of the piston block is fitted to the inner wall of the housing, the outer annular wall of the piston block is fitted to the inner annular wall of the housing, the inner annular wall of the piston block is fitted to the inner side of the annular inner wall, the outer edge of the annular baffle is fitted to the inner annular wall of the groove, and the side wall of the annular baffle is fitted to the side wall of the friction disc.

[0009] A sealing ring is provided between the outer annular wall of the piston block and the inner annular wall of the housing, and a sealing ring is provided between the inner annular wall of the piston block and the inner wall of the annular wall. A sealing ring is also provided between the outer edge of the annular baffle and the inner annular wall of the groove on the piston block. The sealing rings make the area where the piston block is installed inside the housing form an outer air chamber, and the sealing rings make the movement space between the groove on the piston block and the annular baffle form an inner air chamber. The gas in the gas storage tank is connected to the two air chambers through pipelines.

[0010] Furthermore, the housing is symmetrically provided with external air chamber connectors on both sides, and the external air chamber connectors are connected to the external air chambers. The housing is also symmetrically provided with internal air chamber connectors on both sides. One end of the internal air chamber connector passes through the piston block and extends into the internal air chamber. The air in the air storage tank is connected to the two connectors through pipelines.

[0011] Furthermore, the piston block is provided with mounting cavities at positions corresponding to each of the retaining springs, and the retaining springs are fixed in the mounting cavities.

[0012] Furthermore, a bearing seat is fixedly provided on the bridge shaft at a position corresponding to the annular inner wall on one side of the housing, and the annular inner wall is fixedly connected to the bearing seat.

[0013] Furthermore, the housing is assembled from two mirror-symmetrical half-shells, with two piston blocks, annular inner walls, annular baffles, and friction discs arranged mirror-symmetrically within the half-shells on both sides.

[0014] Furthermore, the casing is provided with a water supply tee and a water return tee on its outer side. The water inlets on the friction discs on both sides are connected to two ports of the water supply tee via hoses. The other port of the water supply tee is connected to the vehicle water tank via a hose. The water outlets on the friction discs on both sides are connected to two ports of the water return tee via hoses. The other port of the water return tee is also connected to the vehicle water tank via a hose.

[0015] Furthermore, several friction pads are evenly distributed on both sides of the brake disc.

[0016] The above-mentioned technical solution of this utility model has the following beneficial effects: This utility model improves the structure of the disc brake, so that the friction disc and both sides of the brake disc can make full contact braking. The improvement of the friction disc structure increases the friction area between it and the brake disc, thereby making the brake response faster, the braking force stronger, and the braking process smoother. The friction disc is provided with a circulating water channel to facilitate the flow of cooling water inside, thereby realizing water cooling of the friction disc, avoiding its temperature from being too high, ensuring the braking effect of the friction disc, and improving its resistance to heat fading. In addition, the improved brake has a simple structure, strong braking effect, and is lighter than the traditional drum brake, making it suitable for braking operations of heavy trucks. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the main cross-sectional structure of an embodiment of the present utility model;

[0019] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 This is a cross-sectional structural diagram of the casing according to an embodiment of the present utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the piston block according to an embodiment of the present utility model;

[0022] Figure 5 This is a side view of the friction disc in an embodiment of the present invention.

[0023] Figure 6 This is a side view of the brake disc structure according to an embodiment of the present invention;

[0024] Figure 7 This is a front view schematic diagram of the friction discs on both sides in an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the assembly structure of the housing and friction disc in an embodiment of the present utility model. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0028] like Figure 1-8 As shown, this utility model embodiment provides a water-cooled disc brake for heavy trucks, including an axle 1 fixed on the frame, a rotatable axle head 2 at the end of the axle 1, a wheel hub mounted on the mounting ring 3 of the axle head 2, a brake disc 4 fixed at the port of the axle head 2 where it is inserted into the axle 1, the middle of the brake disc 4 is fixedly connected to the port of the axle head 2 by a screw, the brake disc 4 can rotate together with the axle head 2, an annular hollow housing 5 is fixed on the axle 1 at the position corresponding to the brake disc 4, the brake disc 4 is located in the middle of the housing 5, annular piston blocks 6 are arranged inside the housing 5 at the positions corresponding to both sides of the brake disc 4, annular friction discs 7 are arranged on the side of the piston blocks 6 facing the brake disc 4, and there is a movable gap 8 between the friction disc 7 and the brake disc 4;

[0029] The housing 5 is connected to the vehicle's air tank through a pipeline. The gas in the air tank enters the interior of the housing 5 through the pipeline and drives the piston block 6 to move left and right inside the housing 5. Several clamping springs 9 are evenly distributed along the circumference on the side walls on the left and right sides inside the housing 5. One end of the clamping spring 9 is fixedly connected to the side wall of the piston block 6, and the other end of the clamping spring 9 is fixedly connected to the side wall of the housing 5.

[0030] Heavy-duty trucks generally use air brake drive. The vehicle is equipped with an air compressor and an air tank. The air tank is connected to the housing 5 through a pipeline. The pipeline is equipped with an air valve and a pressure relief valve to control the flow of gas in the housing 5, thereby realizing the movement control of the piston block 5.

[0031] Hollow water channels 10 are provided inside the friction discs 7 on both sides. The friction discs 7 have water inlets 11 and water outlets 12 at their outer edges. The water inlets 11 and water outlets 12 are connected to the vehicle water tank through hoses. The water inlets 11 and water outlets 12 can move together with the friction discs 7. The water inlets 11 and water outlets 12 can pass through the housing 5 and reciprocate on the housing 5 with the friction discs 7.

[0032] The vehicle-mounted water tank is equipped with a water supply pump and a return pump. The water supply pump is connected to the water inlet 11 via a hose, and the return pump is connected to the water outlet 12 via a hose. The two work together to enable the cooling water to flow in the water channel 10 inside the friction disc 7.

[0033] The piston block 6 has a circular groove 6a in the middle of the side facing the brake disc 4. The diameter of the groove 6a is larger than the diameter of the inner hole of the piston block 6. The inner holes of the housing 5 are respectively provided with annular inner walls 13 on both sides corresponding to the positions of the piston block 6. The brake disc 4 and the friction disc 7 are located between the two annular inner walls 13, that is, there is a gap between the left and right annular inner walls 13. The brake disc 4 and the friction disc 7 are arranged in the gap. The brake disc 4 rotates with the shaft head 2 in the gap. The annular inner walls 13 are provided with annular baffles 14 at the end near the friction disc 7. The annular baffles 14 are located in the groove 6a. There is a space for movement between the annular baffles 14 and the bottom wall of the groove 6a. The annular baffles 14 are provided with countersunk holes at the end connected to the annular inner walls 13. Countersunk screws 26 are provided in the countersunk holes. The countersunk screws pass through the annular baffles 14 and are screwed into the screw holes of the annular inner walls 13.

[0034] The outer side wall of piston block 6 is fitted with the inner side wall of housing 5, the outer annular wall of piston block 6 is fitted with the inner annular wall of housing 5, the inner annular wall of piston block 6 is fitted with the inner side of annular inner wall 13, the outer edge of annular baffle 14 is fitted with the inner annular wall of groove 6a, and the side wall of annular baffle 14 is fitted with the side wall of friction disc 7.

[0035] A sealing ring 15 is provided between the outer annular wall of the piston block 6 and the inner annular wall of the housing 5. A sealing ring 15 is also provided between the inner annular wall of the piston block 6 and the inner annular wall 13. A sealing ring 15 is also provided between the outer edge of the annular baffle 14 and the inner annular wall of the groove 6a on the piston block 6. The sealing ring 15 makes the area where the piston block 6 is installed in the housing 5 form an outer air chamber. The sealing ring 15 makes the space between the groove 6a on the piston block 6 and the annular baffle 14 form an inner air chamber 17. The gas in the gas tank is connected to the two air chambers through pipelines.

[0036] The piston block 6 fills the outer air chamber. The arrangement of the sealing ring 15 ensures that the area where the piston block is located is sealed. The piston block 6 can move left and right within the housing 5.

[0037] The gas pressure in the outer air chamber is greater than the gas pressure in the inner air chamber 17. The gas pressure supplied to the outer air chamber is 5 MPa, and the gas pressure supplied to the inner air chamber is 3 MPa. The gas pressure in the inner air chamber is greater than the elastic force of the retaining spring 9, thereby compressing the retaining spring 9.

[0038] The housing 5 has external air chamber connectors 18 symmetrically arranged on both sides, which are connected to the external air chamber. The housing 5 also has internal air chamber connectors 19 symmetrically arranged on both sides. One end of the internal air chamber connector 19 passes through the piston block 6 and extends into the internal air chamber 17. The part of the internal air chamber connector 19 that passes through the housing 1 is provided with a sealing ring. The sealing ring ensures the airtightness of the entire air chamber. The air in the air tank is connected to the two connectors through pipelines.

[0039] The two connectors are connected to the gas storage tank through different pipelines, and each pipeline is equipped with a gas supply valve and a pressure relief valve.

[0040] The piston block 6 has a mounting cavity 20 at the position corresponding to each clamping spring 9. The clamping spring 9 is fixed in the mounting cavity 20. When the piston blocks 6 on both sides move toward the side wall of the housing 5, they will squeeze the clamping spring 9, thereby causing the clamping spring 9 to retract into the mounting cavity 20.

[0041] A bearing seat 21 is fixed on the bridge shaft 1 at the position of the annular inner wall 13 on the side corresponding to the housing 5. The annular inner wall 13 is fixedly connected to the bearing seat 21, and the bearing seat 21 fixes the housing 5 and its internal components on the front shaft 1.

[0042] The housing 5 is assembled from two mirror-symmetrical half-shells. The two piston blocks 5, the annular inner wall 13, the annular baffle 14, and the friction disc 7 are arranged mirror-symmetrically in the half-shells on both sides.

[0043] The housing 5 has a water supply tee 22 and a water return tee 23 on its outer side. The water inlets 11 on the friction discs 7 on both sides are connected to two ports of the water supply tee 22 via hoses. The other port of the water supply tee is connected to the vehicle water tank via a hose. The water outlets 12 on the friction discs 7 on both sides are connected to two ports of the water return tee 23 via hoses. The other port of the water return tee 23 is also connected to the vehicle water tank via a hose. When the water supply pump and the water return pump are started, the cooling water in the vehicle water tank enters the friction discs 7 on both sides of the housing 5 along the hoses. The circulating water flows in the water channel 10 of the friction disc 7 and is discharged in the water outlet 12 through the water return pump. The discharged cooling water returns to the water tank for reuse. When the cooling water flows in the water channel 10, it will carry away the heat of the friction disc 7, thereby preventing the friction disc 7 from overheating during braking, and thus ensuring the braking performance of the friction disc 7.

[0044] The friction disc 7 has a ring-shaped structure with several raised edges evenly distributed around its outer ring. There are eight raised edges evenly distributed around the circumference of the friction disc 7. Correspondingly, the two half-shells also have raised parts at the positions of the edges of the friction disc 7. The ends of the raised parts are provided with installation notches. After the two half-shells are spliced ​​together, the two installation notches form a movable opening. The edge of the friction disc 7 is set in the movable opening, and the end of the edge is flush with the edge of the movable opening. The edge of the friction disc 7 moves within the movable opening. The two half-shells are fixedly connected by bolts. The bolts pass through each of the raised parts on both sides and are tightened. The edge of the friction disc 7 is provided with a through hole. The through hole can avoid the water channel 10 or can be used as a sealing sleeve. The bolt passes through the sleeve. The sleeve can keep the water channel 10 inside the friction disc 7 sealed. The bolt only passes through the through hole and does not restrict the movement of the friction disc 7.

[0045] Several friction pads 24 are evenly distributed on both sides of the brake disc 4. The friction disc 7 and the friction pads 24 make frictional contact, thereby causing the vehicle to decelerate and stop.

[0046] The working principle of this utility model is as follows: When the vehicle is moving, the parking handle in the compartment is operated to supply gas from the air tank. At this time, the air in the air tank is supplied into the inner air chamber 17 through the pipeline. As the air enters, the air pressure will compress the retaining spring 9, thereby causing the piston blocks 6 on both sides to move away from the brake disc 4. At this time, the piston block 6 compresses the retaining spring 9, and the friction disc 7 at the end of the piston block 6 is also separated from the brake disc 4. Thus, the friction disc 7 does not contact the brake disc 4, so that the vehicle can move normally.

[0047] When the vehicle is in motion, the driver will press the brake pedal when decelerating or stopping. At this time, the pedal controls the air tank to supply air into the outer air chamber through the transmission mechanism. Since the air pressure of the outer air chamber is greater than the air pressure of the inner air chamber 17, the air entering the outer air chamber will push the piston blocks 6 on both sides to move towards the brake disc 4. This will cause the friction pad 7 on the inner side of the brake disc 4 to contact the friction pads 24 on both sides of the brake disc 4. The friction between the two can achieve the deceleration and stopping of the vehicle.

[0048] When the vehicle is parked, the pressure relief valve on the outer air chamber pipeline and the pressure relief valve on the inner air chamber 17 pipeline are both opened, thereby venting the gas in the two chambers. At this time, under the action of its return spring, the clamping spring 9 will push the piston block 6 to move towards the brake disc 4. Then, the return spring of the clamping spring 9 will cause the friction disc 7 to press against both sides of the brake disc 4. The two friction discs 7 will hold the brake disc tightly, thus achieving vehicle parking.

[0049] The brake in this invention can be connected to the vehicle's ABS system to prevent lock-up during braking. The ABS system is a common technology in vehicles, and its specific principles and structure will not be described in detail here.

[0050] During vehicle operation, cooling water can be supplied to the friction discs 7 on both sides via a water pump and hoses. The cooling water enters the water channels 10 within the friction discs 7. As the cooling water flows within the water channels 10, it carries away the temperature of the friction discs 7, thereby cooling the friction discs 7 and maintaining their braking effect. After the cooling water fills the water channels 10, it will be discharged through the outlet 12 and hoses. The discharged cooling water will re-enter the vehicle's water tank, thus achieving the circulation of cooling water within the friction discs 7 and ensuring the cooling effect of the cooling water.

[0051] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A water-cooled disc brake for heavy-duty trucks, comprising an axle fixedly mounted on a chassis, wherein the axle has a rotatable axle head at its end, and a wheel hub is mounted on a mounting ring disc on the axle head, characterized in that: The axle head is fixed with a brake disc at the port where it is inserted into the axle shaft. The brake disc can rotate with the axle head. An annular hollow housing is fixed on the axle shaft at the position corresponding to the brake disc. The brake disc is located in the middle of the housing. An annular piston block is arranged inside the housing at the positions corresponding to both sides of the brake disc. An annular friction disc is arranged on the side of the piston block facing the brake disc. There is a movable gap between the friction disc and the brake disc. The housing is connected to the vehicle's air tank via a pipeline. Gas from the air tank enters the housing through the pipeline and drives the piston block to move left and right inside the housing. Several clamping springs are evenly distributed circumferentially on the side walls of the left and right sides inside the housing. One end of the clamping spring is fixedly connected to the side wall of the piston block, and the other end of the clamping spring is fixedly connected to the side wall of the housing. Hollow water channels are provided inside the friction discs on both sides. The friction discs have water inlets and outlets at their outer edges, and the water inlets and outlets are respectively connected to the vehicle water tank via hoses.

2. The heavy-duty truck water-cooled disc brake according to claim 1, characterized in that: The piston block has a circular groove in the middle of the side facing the brake disc. The diameter of the groove is larger than the diameter of the inner hole of the piston block. The inner holes of the housing are respectively provided with annular inner walls on both sides at the positions corresponding to the piston block. The brake disc and the friction disc are located between the two annular inner walls. The two annular inner walls are provided with annular baffles at the ends near the friction disc. The annular baffles are located in the groove. There is a space for movement between the annular baffles and the bottom wall of the groove. The outer wall of the piston block is fitted to the inner wall of the housing, the outer annular wall of the piston block is fitted to the inner annular wall of the housing, the inner annular wall of the piston block is fitted to the inner side of the annular inner wall, the outer edge of the annular baffle is fitted to the inner annular wall of the groove, and the side wall of the annular baffle is fitted to the side wall of the friction disc. A sealing ring is provided between the outer annular wall of the piston block and the inner annular wall of the housing, and a sealing ring is provided between the inner annular wall of the piston block and the inner wall of the annular wall. A sealing ring is also provided between the outer edge of the annular baffle and the inner annular wall of the groove on the piston block. The sealing rings make the area where the piston block is installed inside the housing form an outer air chamber, and the sealing rings make the movement space between the groove on the piston block and the annular baffle form an inner air chamber. The gas in the gas storage tank is connected to the two air chambers through pipelines.

3. The heavy-duty truck water-cooled disc brake according to claim 2, characterized in that: The housing has symmetrically arranged external air chamber connectors on both sides, which are connected to the external air chamber. The housing also has symmetrically arranged internal air chamber connectors on both sides. One end of the internal air chamber connector passes through the piston block and extends into the internal air chamber. The air in the air tank is connected to the two connectors through pipelines.

4. The heavy-duty truck water-cooled disc brake according to claim 3, characterized in that: The piston block has a mounting cavity at the position corresponding to each of the clamping springs, and the clamping spring is fixed in the mounting cavity.

5. The heavy-duty truck water-cooled disc brake according to claim 4, characterized in that: A bearing seat is fixedly provided on the bridge shaft at a position corresponding to the annular inner wall on one side of the housing, and the annular inner wall is fixedly connected to the bearing seat.

6. The heavy-duty truck water-cooled disc brake according to claim 5, characterized in that: The housing is assembled from two mirror-symmetrical half-shells, with two piston blocks, annular inner walls, annular baffles, and friction discs arranged mirror-symmetrically inside the half-shells on both sides.

7. The heavy-duty truck water-cooled disc brake according to claim 1, characterized in that: The casing has a water supply tee and a water return tee on its outer side. The water inlets on the friction discs on both sides are connected to two ports of the water supply tee via hoses. The other port of the water supply tee is connected to the vehicle water tank via a hose. The water outlets on the friction discs on both sides are connected to two ports of the water return tee via hoses. The other port of the water return tee is also connected to the vehicle water tank via a hose.

8. The heavy-duty truck water-cooled disc brake according to claim 1, characterized in that: Several friction pads are evenly distributed on both sides of the brake disc.

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