CN215154538U

CN215154538U - Water spray cooling device for automobile drum brake

Info

Publication number: CN215154538U
Application number: CN202121555693.2U
Authority: CN
Inventors: 黄琪; 黄正宏
Original assignee: Jiangsu Hengxin Runxiang Electromechanical Manufacturing Co ltd
Current assignee: Jiangsu Hengxin Runxiang Electromechanical Manufacturing Co ltd
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2021-12-14
Anticipated expiration: 2031-07-08

Abstract

The utility model discloses a car drum brake water spray heat sink, including the raceway that communicates in radiator, the raceway is kept away from water tank one end and is passed the brake chassis of stopper and be located the brake drum of stopper, be provided with the brake shoe on the brake chassis, fixedly connected with is used for the friction disc of conflict brake drum inner peripheral surface on the brake shoe, be provided with on the brake chassis and be used for promoting the brake shoe to the brake wheel cylinder that is close to the brake drum inner peripheral surface and slides, water tank pot head is kept away from to the raceway is equipped with the honeycomb duct, the axis direction of honeycomb duct is parallel with the glide direction of brake shoe, fixedly connected with is used for the brake shoe together with honeycomb duct synchronous movement's fastening device on the brake shoe, be provided with in the honeycomb duct and be used for switching on the raceway under the brake wheel cylinder piston rod release state and the brake wheel cylinder piston rod is closed the movable plug that the water pipe under the state of withdrawing. This application has in time for the cooling of drum brake when drum brake braking, improves the effect of drum brake's security.

Description

Water spray cooling device for automobile drum brake

Technical Field

The invention relates to the field of drum brake cooling devices, in particular to a water spraying cooling device for an automobile drum brake.

Background

With the improvement of the living standard of people, automobiles become an important part in daily life of people, and in the application of automobile brakes, drum brakes occupy an important position by virtue of excellent braking effect and lower production cost.

When the drum brake is in a braking state, the brake oil cylinder pushes the brake shoe to enable the friction plate fixedly connected with the brake shoe to tightly abut against the inner circumferential surface of the brake drum, a braking effect is achieved through mutual friction between the friction plate and the brake drum, a large amount of heat can be generated in the friction process of the friction plate and the brake drum, the braking effect of the brake can be affected by overhigh temperature, the traditional water spray cooling device is difficult to spray cooling liquid in time when the brake brakes, the cooling timeliness is reduced, and therefore the danger in the driving process is increased.

SUMMERY OF THE UTILITY MODEL

In order to improve the timeliness to the drum brake cooling, improve the security of driving the process, this application provides an automobile drum brake water spray heat sink.

The application provides a pair of car drum brake water spray heat sink adopts following technical scheme:

a water spray cooling device of an automobile drum brake comprises a water pipe communicated with an automobile water tank, one end, far away from the water tank, of the water pipe penetrates through a brake chassis of the drum brake and is located in a brake drum of the drum brake, a brake shoe is arranged on the brake chassis, a friction plate used for abutting against the inner peripheral surface of the brake drum is fixedly connected onto the brake shoe, a brake wheel cylinder used for pushing the brake shoe to slide towards the inner peripheral surface of the brake drum is arranged on the brake chassis, a guide pipe is sleeved at one end, far away from the water tank, of the water pipe, the axial direction of the guide pipe is parallel to the sliding direction of the brake shoe, a fastening mechanism used for synchronously moving the brake shoe and the guide pipe is fixedly connected onto the brake shoe, a piston rod of the brake wheel cylinder is arranged in the guide pipe and is used for conducting the water pipe when the piston rod of the brake wheel cylinder is pushed out, and a piston rod of the brake wheel cylinder is sealed when the piston rod is retracted The closing part is a movable plug of the water pipe.

By adopting the technical scheme, in a braking state, the piston rod of the brake wheel cylinder extends out, and under the thrust action of the piston rod, the brake shoe slides towards the inner peripheral surface of the brake drum, so that the guide pipe moves along with the brake shoe, and the movable plug is communicated with the pipe opening of the water pipe, therefore, cooling water in the water tank can flow into the brake drum, the effect of timely cooling the drum brake during braking is achieved, and the safety of the drum brake is improved.

Preferably, a first return spring for pulling the brake shoe to slide in a direction away from the brake drum is fixedly connected to the brake shoe; the movable plug comprises a plug cone abutting against the water pipe and far away from the pipe opening at one end of the water tank, a fixed rod is fixedly connected to the plug cone, and one side, far away from the plug cone, of the fixed rod is fixedly connected to the inner circumferential surface of the flow guide pipe.

By adopting the technical scheme, when the drum brake releases braking, the piston rod of the brake wheel cylinder is retracted, the first reset spring pulls back the brake shoe, so that the plug cone can seal the pipe orifice of the water pipe, thereby blocking the outflow of cooling water, reducing the loss speed of the cooling water, reducing the possibility of damaging internal parts of the brake due to excessive cooling liquid, and improving the safety of the brake.

Preferably, the draft tube penetrates through the brake shoe, a through draft hole is formed in the end face, close to the brake drum, of the friction plate, and one end, close to the friction plate, of the draft tube is inserted into the draft hole.

Through adopting above-mentioned technical scheme, through inserting the honeycomb duct and locate in the water conservancy diversion hole, make the transport to the violent position of friction that cooling water can be timely to improve cooling efficiency, increased the cooling timeliness simultaneously.

Preferably, a fastening mechanism used for preventing the draft tube and the brake shoe from sliding relatively is arranged on the brake shoe, the fastening mechanism comprises a fastening block fixedly connected to the side face, far away from the friction plate, of the brake shoe, a first penetrating connecting hole is formed in the end face, far away from the friction plate, of the fastening block, an inserting groove is formed in the side face of the fastening block, an inserting block is inserted into the inserting groove, a second connecting hole is formed in the inserting block, a second reset spring is fixedly connected between the side face, close to the bottom face of the inserting groove, of the inserting block and the bottom face of the inserting groove, and the draft tube penetrates through the first connecting hole and the second connecting hole.

Through adopting above-mentioned technical scheme, will pass the honeycomb duct centre gripping in connecting hole one and the connecting hole two through reset spring two to hinder the honeycomb duct to break away from the brake shoe, make the honeycomb duct more enough follow the brake shoe synchronous motion, the dismantlement and the installation of the honeycomb duct of being convenient for simultaneously.

Preferably, a limiting block is fixedly connected to the inner side wall of the second connecting hole, a limiting groove is formed in the outer peripheral surface of the flow guide pipe, and the limiting block is inserted into the limiting groove.

Through adopting above-mentioned technical scheme, stopper and spacing groove cooperation hinder honeycomb duct axial float to further hinder the honeycomb duct and break away from, increased the steadiness that brake shoe and honeycomb duct are connected.

Preferably, one end of the water pipe close to the flow guide pipe is fixedly connected with a fixing frame, and the water pipe is fixed on the fixing frame.

Through adopting above-mentioned technical scheme, it is fixed with the one end that the water tank was kept away from to the honeycomb duct through the mount, hinders that the one end that the water tank was kept away from to the honeycomb duct removes at drum brake is inside to improve the degree of accuracy that the movable plug controlled the raceway break-make, improve water spray heat sink's controllability.

Preferably, be provided with the booster pump that is used for increasing hydraulic pressure on the raceway, the honeycomb duct is kept away from raceway one end is installed the atomizer.

Through adopting above-mentioned technical scheme, because the cooling water storage volume in the radiator is limited, consequently increase the pressure of cooling water through the booster pump to cooling water atomizing after will supercharging through atomizer, thereby increase the utilization ratio of cooling water in the radiator, the reduction causes the condition emergence that the coolant liquid runs out fast because of frequent braking.

Preferably, a return pipe is communicated between the supercharger and the guide pipe of the water pipe, the return pipe is far away from the water pipe and is communicated with the water tank, and an overflow valve for balancing pressure difference is arranged on the return pipe.

Through adopting above-mentioned technical scheme, when the movable stopper seals the mouth of pipe of raceway, because the continuous work of booster pump causes the water pressure in the raceway between booster pump and the movable stopper to continuously increase, has increased the atress of movable stopper, has also increased the load of booster pump simultaneously, and the setting up of overflow valve has balanced the water pressure in the raceway between booster pump and the movable stopper, has reduced the atress to the movable stopper, has reduced the load of booster pump.

In summary, in a braking state, a piston rod of the brake wheel cylinder extends out, under the thrust action of the piston rod, the brake shoe slides towards the inner circumferential surface of the brake drum, and the fastening mechanism enables the flow guide pipe to move along with the brake shoe, so that the movable plug conducts the pipe opening of the water pipe, cooling water in the water tank can flow into the brake drum, the effect of timely cooling the drum brake during braking is achieved, and the safety of the drum brake is improved.

Drawings

FIG. 1 is a schematic view of the overall structure of a water spray cooling device according to an embodiment of the present application.

Fig. 2 is a schematic view of the construction of a brake drum in a drum brake.

Fig. 3 is a sectional view of the draft tube in the embodiment of the present application, mainly illustrating the internal structure of the fastening mechanism and the structure of the piston rod in the draft tube.

Description of reference numerals:

1. a water spraying cooling device; 11. a water delivery pipe; 12. a flow guide pipe; 121. a limiting groove; 13. a booster pump; 14. an overflow valve; 15. a return pipe; 16. a movable plug; 161. plugging a cone; 162. fixing the rod; 17. an atomizing spray head; 2. braking the chassis; 21. a fixed mount; 211. a fixing hole; 3. a brake shoe; 31. a fastening mechanism; 311. a fastening block; 3111. a first connecting hole; 312. inserting a block; 213. inserting grooves; 3121. a second connecting hole; 3122. a limiting block; 313. a second return spring; 32. a push rod; 4. a friction plate; 41. a flow guide hole; 5. a brake drum; 6. a brake wheel cylinder; 7. a first return spring; 8. a guide block; 81. a guide hole; 100. a drum brake; 101. a water tank.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses car drum brake water spray heat sink. Referring to fig. 1 and 2, a drum brake 100 includes a brake chassis 2, a brake shoe 3, a friction plate 4, a brake drum 5, a push rod 32, a guide block 8 and a brake cylinder 6, the brake chassis 2 is circular plate-shaped, the brake shoe 3 and the friction plate 4 are arc plate-shaped, a concave surface of the friction plate 4 is fixedly connected to a convex surface of the brake shoe 3 close to an inner circumferential surface of the brake drum 5, the push rod 32 is fixedly connected to a concave surface of the brake shoe 3, the push rod 32 is horizontally arranged, a length direction of the guide block 8 is identical to a length direction of the push rod 32, guide holes 81 penetrating through two end surfaces are formed in an end surface of the guide block 8, the push rod 32 penetrates through the guide holes 81, the brake drum 5 is of a cylindrical cover structure, and an end surface of the brake drum 5 close to the brake chassis 2 is open.

Referring to fig. 1 and 2, two groups of brake shoes 3, friction plates 4, push rods 32 and guide blocks 8 are symmetrically arranged on the same side end faces of a brake chassis 2, the brake wheel cylinders 6 are fixedly connected between the push rods 32, piston rods at two ends of the brake wheel cylinders 6 respectively abut against the end faces of the two push rods 32 far away from the brake shoes 3, when the drum brake 100 brakes, the piston rods of the brake wheel cylinders 6 are pushed out, the push rods 32 are pushed to communicate the brake shoes 3 and the friction plates 4 to slide in the direction close to the inner circumferential surface of the brake drum 5, so that the friction plates 4 abut against the inner circumferential surface of the brake drum 5, and the braking effect is achieved.

Referring to fig. 1 and 3, the water spray cooling device 1 includes a water pipe 11, a flow guide pipe 12, a return pipe 15, a booster pump 13, an overflow valve 14, a movable plug 16 and a fastening mechanism 31, one end of the water pipe 11 is communicated with a water tank 101 of an automobile, one end of the water pipe 11, which is far away from the water tank 101, penetrates through a brake shoe 3 disc from an end surface of the brake chassis 2, which is far away from the brake shoe 3, an axial line of one end of the water pipe 11, which is far away from the water tank 101, is consistent with a length direction of a push rod 32, and the flow guide pipe 12 is sleeved at one end of the water pipe 11, which is far away from the water tank 101. The convex surface of the friction plate 4 is provided with a flow guide hole 41 which runs through the concave surface, the flow guide pipe 12 passes through the brake shoe 3, and one end of the flow guide pipe 12, which is far away from the water pipe 11, is inserted in the flow guide pipe 12.

Referring to fig. 1 and 3, the fastening mechanism 31 includes a fastening block 311, an insertion block 312 and a second return spring 313, the fastening block 311 is fixedly connected to the upper portion of the concave surface of the brake shoe 3, the end surface of the fastening block 311 away from the brake shoe 3 is provided with a first connection hole 3111, the first connection hole 3111 penetrates through the end surface of the fastening block 311 close to the brake shoe 3, the top surface of the fastening block 311 is provided with an insertion groove 213, the insertion block 312 is inserted into the insertion groove 213, the side surface of the insertion block 312 is provided with a second connection hole 3121 communicated with the first connection hole 3111, the first connection hole 3111 has the same diameter as the second connection hole 3121, two ends of the second return spring 313 are respectively and fixedly connected to the bottom surface of the insertion block 312 and the bottom surface of the insertion groove 213, one end of the draft tube 12 away from the friction plate 4 penetrates through the first connection hole 3111 and the second connection hole 3121, under the action of the elastic force of the second return spring 313, the fastening block 311 and the insertion block 312 clamp the draft tube 12, thereby preventing the draft tube 12 from being separated from the brake shoe 3, the draft tube 12 can move synchronously with the brake shoe 3, and the draft tube 12 is convenient to detach and mount.

Referring to fig. 1 and 3, the bottom of the inner peripheral surface of the second connecting hole 3121 is fixedly connected with a limiting block 3122, the bottom of the guide pipe 12 on the outer peripheral surface is provided with a limiting groove 121, the limiting block 3122 is inserted into the limiting groove 121, the limiting block 3122 is matched with the limiting groove 121, the guide pipe 12 is further prevented from being separated, and the stability of the connection between the brake shoe 3 and the guide pipe 12 is increased.

Referring to fig. 1 and 3, the movable plug 16 is located in the draft tube 12, the movable plug 16 includes a plug cone 161 and a fixing rod 162, the plug cone 161 is a cone structure, the top of the plug cone 161 faces the water pipe 11, one end of the fixing rod 162 is fixedly connected to the bottom of the plug cone 161, one end of the fixing rod 162 away from the plug cone 161 is fixedly connected to the inner side wall of the draft tube 12, two fixing rods 162 are located in the draft tube 12, the two fixing rods 162 are symmetrically located at the upper portion and the lower portion of the inner side wall of the draft tube 12, a first return spring 7 is fixedly connected between the two brake shoes 3, the first return spring 7 is horizontally arranged, the two first return springs 7 are located, the two first return springs 7 are respectively located at the top and the bottom of the brake shoes 3, when the drum brake 100 is in a non-braking state, the first return spring 7 provides a pulling force to move the two brake shoes 3 toward each other direction, so that the side of the plug cone 161 is abutted against the pipe orifice of the water pipe 11, therefore, the brake device can block the cooling water from flowing out in the non-braking state, reduce the loss speed of the cooling water, reduce the possibility of damaging the internal parts of the brake due to excessive cooling liquid and improve the safety of the brake.

Referring to fig. 1 and 3, a fixing frame 21 is arranged at one end of the water pipe 11 close to the draft tube 12, the fixing frame 21 is in a strip plate shape, the end face of the fixing frame 21 is fixedly connected to the end face of the brake chassis 2, the length direction of the fixing frame 21 is perpendicular to the end face of the brake chassis 2, a fixing hole 211 is formed in the side face of the fixing frame 21 far away from one end of the brake chassis 2, the water pipe 11 penetrates through the fixing hole 211 and is in interference connection with the fixing hole 211, and therefore the end, far away from the water tank 101, of the draft tube 12 is prevented from moving inside the drum brake 100, and the accuracy of the movable plug 16 in controlling the on-off of the water pipe 11 is improved.

Referring to fig. 1 and 3, the booster pump 13 is connected to the water pipe 11, the booster pump 13 is located between the water tank 101 and the brake chassis 2, the atomizing nozzle 17 is fixedly connected to one end of the flow guide pipe 12 far away from the water pipe 11, the pressure of the cooling water is increased by the booster pump 13, and the pressurized cooling water is atomized by the atomizing nozzle 17, so that the utilization rate of the cooling water in the automobile water tank 101 is increased, the return pipe 15 is communicated with the water pipe 11 between the booster pump 13 and the brake chassis 2, one end of the return pipe 15 far away from the water pipe 11 is communicated with the water tank 101, the return pipe 15 is communicated with the overflow valve 14, the overflow valve 14 can balance the water pressure in the water pipe 11 between the booster pump 13 and the movable plug 16 in the non-braking state, the stress on the movable plug 16 is reduced, and the load of the booster pump 13 is reduced. Two groups of water spraying cooling devices 1 are symmetrically arranged on the end face of the brake chassis 2 on the same side.

The implementation principle of the automobile drum brake water spray cooling device in the embodiment of the application is as follows: in a braking state, a piston rod of the brake wheel cylinder 6 extends out to push the push rod 32 to enable the brake shoe 3 to slide towards the inner circumferential surface of the brake drum 5, the guide pipe 12 moves along with the brake shoe 3 through the fastening mechanism 31, so that the plug cone 161 of the movable plug 16 conducts the pipe orifice of the water pipe 11, the atomizing nozzle 17 sprays cooling water to the friction surface between the friction plate 4 and the brake drum 5, the effect of timely cooling the drum brake 100 in braking is achieved, and the safety of the drum brake 100 is improved.

When the drum brake 100 is released, the piston rod of the brake wheel cylinder 6 is retracted, the first return spring 7 pulls the brake shoe 3 back, and the plug cone 161 can seal the pipe orifice of the water pipe 11, so that the cooling water is prevented from flowing out continuously, the loss speed of the cooling water is reduced, the possibility of damage to internal parts of the brake due to excessive cooling liquid is reduced, and the safety of the brake is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an automobile drum brake water spray heat sink which characterized in that: the water spraying and cooling device (1) comprises a water pipe (11) communicated with an automobile water tank (101), one end of the water pipe (11), far away from the water tank (101), penetrates through a brake chassis (2) of the drum brake (100) and is positioned in a brake drum (5) of the drum brake (100), a brake shoe (3) is arranged on the brake chassis (2), a friction plate (4) used for abutting against the inner circumferential surface of the brake drum (5) is fixedly connected onto the brake shoe (3), a brake wheel cylinder (6) used for pushing the brake shoe (3) to slide close to the inner circumferential surface of the brake drum (5) is arranged on the brake chassis (2), a guide pipe (12) is sleeved at one end, far away from the water tank (101), of the water pipe (11), and the axial direction of the guide pipe (12) is parallel to the sliding direction of the brake shoe (3), the brake shoe (3) is fixedly connected with a fastening mechanism (31) used for the brake shoe (3) and the guide pipe (12) to synchronously move, and a movable plug (16) used for conducting the water pipe (11) when the piston rod of the brake wheel cylinder (6) is pushed out and sealing the water pipe (11) when the piston rod of the brake wheel cylinder (6) is retracted is arranged in the guide pipe (12).

2. The automotive drum brake water spray cooling device of claim 1, wherein: a first return spring (7) for pulling the brake shoe (3) to slide towards the direction far away from the brake drum (5) is fixedly connected to the brake shoe (3); the movable plug (16) comprises a plug cone (161) which is abutted to the water pipe (11) and is far away from the pipe opening at one end of the water tank (101), a fixed rod (162) is fixedly connected to the plug cone (161), and one side, far away from the plug cone (161), of the fixed rod (162) is fixedly connected to the inner circumferential surface of the flow guide pipe (12).

3. The automotive drum brake water spray cooling device of claim 1, wherein: the draft tube (12) penetrates through the brake shoe (3), the end face, close to the brake drum (5), of the friction plate (4) is provided with a through flow guide hole (41), and one end, close to the friction plate (4), of the draft tube (12) is inserted into the flow guide hole (41).

4. The automotive drum brake water spray cooling device of claim 3, wherein: the brake shoe (3) is provided with a fastening mechanism (31) for preventing the draft tube (12) and the brake shoe (3) from sliding relatively, the fastening mechanism (31) comprises a fastening block (311) fixedly connected to the side surface of the brake shoe (3) far away from the friction plate (4), the end face of the fastening block (311) far away from the friction plate (4) is provided with a first through connecting hole (3111), the side surface of the fastening block (311) is provided with an inserting groove (213), an inserting block (312) is inserted in the inserting groove (213), a second connecting hole (3121) is formed in the plug block (312), a second return spring (313) is fixedly connected between the side surface of the plug block (312) close to the bottom surface of the plug groove (213) and the bottom surface of the plug groove (213), the draft tube (12) penetrates through the first connecting hole (3111) and the second connecting hole (3121).

5. The automotive drum brake water spray cooling device of claim 4, wherein: the inner side wall of the second connecting hole (3121) is fixedly connected with a limiting block (3122), the outer peripheral surface of the flow guide pipe (12) is provided with a limiting groove (121), and the limiting block (3122) is inserted into the limiting groove (121).

6. The automotive drum brake water spray cooling device of claim 1, wherein: one end of the water pipe (11) close to the guide pipe (12) is fixedly connected with a fixing frame (21), and the water pipe (11) is fixed on the fixing frame (21).

7. The automotive drum brake water spray cooling device of claim 1, wherein: be provided with on raceway (11) and be used for increasing hydraulic booster pump (13), honeycomb duct (12) are kept away from raceway (11) one end is installed atomizer (17).

8. The automotive drum brake water spray cooling device of claim 7, wherein: the water pipe (11) is located the booster pump (13) with intercommunication has back flow (15) between honeycomb duct (12), keep away from on back flow (15) communicate between water pipe (11) in water tank (101), be provided with on back flow (15) with overflow valve (14) that are used for balanced pressure differential.