CN113815587A - Hydraulic auxiliary brake system of vehicle - Google Patents
Hydraulic auxiliary brake system of vehicle Download PDFInfo
- Publication number
- CN113815587A CN113815587A CN202010562568.8A CN202010562568A CN113815587A CN 113815587 A CN113815587 A CN 113815587A CN 202010562568 A CN202010562568 A CN 202010562568A CN 113815587 A CN113815587 A CN 113815587A
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- China
- Prior art keywords
- axle
- transmission shaft
- hydraulic
- speed reducer
- vehicle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
- B60T13/16—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs
- B60T13/168—Arrangements for pressure supply
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
- B60T13/16—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs
- B60T13/20—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs with control of pump driving means
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The hydraulic auxiliary braking system of the vehicle comprises an axle, a transmission shaft, a speed reducer, a clutch, a hydraulic pump, a hydraulic oil tank and a control valve, wherein the axle is of a hollow structure, a shell of the speed reducer is fixedly connected to the axle, the transmission shaft is arranged in the axle, and one end of the transmission shaft extends to the end part of the axle; the clutch is connected between the other end of the transmission shaft and the input end of the speed reducer to connect or disconnect the other end of the transmission shaft and the input end of the speed reducer, and the main shaft of the hydraulic pump is connected with the output end of the speed reducer; the oil inlet of the hydraulic pump is communicated with the hydraulic oil tank, the oil outlet of the hydraulic oil pump is communicated with the inlet of the control valve, and the outlet of the control valve is communicated with the hydraulic oil tank to form a hydraulic loop. The invention reduces the impact force generated by the non-driving axle to the vehicle during braking, shortens the braking distance, improves the braking performance of the vehicle, lightens the loss of the friction plate and plays a role in protecting the brake pad of the vehicle braking system.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a hydraulic auxiliary braking system of a vehicle.
Background
The axle is an important part of the trailer and mainly plays a role in bearing the weight of the vehicle body; at present, the braking system of a non-driving axle of a vehicle is mostly controlled through pneumatic control, a pneumatic unit is controlled by a braking pedal of the vehicle during braking, when the braking pedal is operated, the pneumatic unit controls the braking system on the axle to work, and the braking unit in the braking system and a brake pad rub to generate braking force.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a hydraulic auxiliary braking system of a vehicle, which can reduce the impact force of a non-driving axle on the vehicle, shorten the braking distance and reduce the loss of friction plates.
In order to achieve the purpose, the invention adopts the following technical scheme:
the hydraulic auxiliary braking system of the vehicle comprises an axle, a transmission shaft, a speed reducer, a clutch, a hydraulic pump, a hydraulic oil tank and a control valve, wherein the axle is of a hollow structure, a shell of the speed reducer is fixedly connected to the axle, the transmission shaft is arranged in the axle, and one end of the transmission shaft extends to the end part of the axle; the clutch is connected between the other end of the transmission shaft and the input end of the speed reducer to connect or disconnect the other end of the transmission shaft and the input end of the speed reducer, and the main shaft of the hydraulic pump is connected with the output end of the speed reducer; the oil inlet of the hydraulic pump is communicated with the hydraulic oil tank, the oil outlet of the hydraulic oil pump is communicated with the inlet of the control valve, and the outlet of the control valve is communicated with the hydraulic oil tank to form a hydraulic loop.
The shell of the speed reducer and the middle part of the axle jointly enclose an installation cavity, the speed reducer comprises a transmission assembly located in the installation cavity, the transmission assembly comprises an input end gear pivoted in the shell, an output end gear pivoted in the shell and a gear set connected between the input end gear and the output end gear, a clutch is connected between one end of a transmission shaft close to the middle part of the axle and the input end gear, and a hydraulic pump is synchronously connected with the output end gear.
The clutch comprises a plurality of first friction plates, a plurality of second friction plates, a jacking elastic sheet and a pushing piece, wherein the first friction plates and the second friction plates are arranged at intervals to form a friction sheet assembly, the first friction plates are synchronously connected to the transmission shaft, the second friction plates are synchronously connected to the input end gear, one side of the friction sheet assembly is abutted against the input end gear, the jacking elastic sheet is pressed on the other side of the friction sheet assembly, and the pushing piece is used for pushing the jacking elastic sheet to enable the jacking elastic sheet to apply elastic stress to the friction sheet assembly.
A piston is sleeved on the transmission shaft, a fixed sleeve is fixed on the axle and is in close fit with the piston, a sealing cavity is defined between the fixed sleeve and the piston, a channel is arranged on the fixed sleeve, one end of the channel extends to the outer surface of the axle, and the other end of the channel extends to the sealing cavity; the pushing piece is sleeved on the transmission shaft in a sliding mode, and two ends of the pushing piece are respectively abutted to the jacking elastic piece and the piston.
The input end gear comprises a fixed seat, a gear ring connected to the outer edge of the fixed seat and an end cover connected to the fixed seat, one end of the transmission shaft close to the middle part of the axle sequentially penetrates through the end cover and the fixed seat, an installation groove is formed between the fixed seat and the end cover, the friction sheet assembly is arranged in the installation groove, one side of the friction sheet assembly abuts against one side wall of the installation groove, and the jacking elastic sheet is arranged between one side wall of the installation groove and the friction sheet assembly; a gap is formed between the end cover and the transmission shaft, and one end of the pushing piece close to the jacking elastic piece penetrates through the gap to be abutted against the jacking elastic piece.
The hydraulic oil tank is fixedly arranged on the axle.
The shell of the hydraulic pump is fixedly connected to the shell of the speed reducer.
The invention has the beneficial effects that:
compared with the prior art, the pressure auxiliary braking system disclosed by the invention has the advantages that when the vehicle brake pedal acts, the hydraulic pump is started along with the transmission shaft, the hydraulic pump applies work to oil in the hydraulic oil tank, and the load is rapidly added to the transmission shaft, so that the kinetic energy of the transmission shaft is consumed, the wheel end kinetic energy of the vehicle is further consumed, the impact force generated by a non-driving axle to the vehicle during braking is reduced, the braking distance is shortened, the braking performance of the vehicle is improved, the loss of a friction plate is reduced, and the brake pad of the vehicle braking system is protected.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the installation of the present invention;
FIG. 3 is a cross-sectional view of the present invention;
fig. 4 is an enlarged view at a in fig. 3.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments:
as shown in fig. 1, 2, 3 and 4, a hydraulic auxiliary brake system of a vehicle according to the present invention includes an axle 10, a transmission shaft 20, a speed reducer 30, a clutch 60, a hydraulic oil tank 50 of a hydraulic pump 40 and a control valve, wherein the axle 10 is of a hollow structure, and specifically, a shaft hole is formed inside the axle 10, the shaft hole extends from a substantially middle portion of the axle 10 to one end of the axle 10, the speed reducer 30 includes a housing 31 and a transmission assembly, the housing 31 is fixedly connected to the middle portion of the axle 10, and after the housing 31 and the axle 10 are fixed, the housing 31 and the axle 10 enclose a mounting cavity, the transmission shaft 20 is threaded into the shaft hole of the axle, one end of the transmission shaft 20 extends to an end portion of the axle 10 for connecting with a wheel at the end portion of the axle 10 to transmit power, the other end of the transmission shaft 20 extends into the mounting cavity, the clutch 60 is coupled between the other end of the transmission shaft 20 and an input end of the transmission assembly of the speed reducer 30, the clutch 60 is used to couple or decouple the other end of the transmission shaft 20 to or from the input end of the speed reducer 30, that is, the clutch 60 can couple the transmission shaft 20 to the input end of the speed reducer 30 to realize power transmission in one state, and can decouple the transmission shaft 20 from the speed reducer 30 to disconnect the power transmission between the two states. The main shaft of the hydraulic pump 40 is connected to the output end of the transmission component of the reducer 30, and the hydraulic pump 40 can be driven by the output end of the reducer 30; an oil inlet of the hydraulic pump 40 is communicated with the hydraulic oil tank 50 through a pipeline, an oil outlet of the hydraulic pump 40 is communicated with an inlet of the control valve through a pipeline, and an outlet of the control valve is communicated with the hydraulic oil tank 50 through a pipeline, so that the hydraulic pump 40, the control valve and the hydraulic oil tank 50 form a hydraulic loop. The hydraulic oil tank 50 may be fixed to a frame of the vehicle or may be fixed to the axle 10.
When the vehicle brakes, the vehicle brake pedal acts, the clutch 60 connects the transmission shaft 20 with the input end of the speed reducer 30 rapidly, at this time, the speed reducer transmits the power of the transmission shaft 20 to the hydraulic pump 40 to drive the main shaft of the hydraulic pump 40 to rotate, the hydraulic pump 40 sucks oil from the hydraulic oil tank 50, the oil passes through the control valve and then overflows back to the hydraulic oil tank, so that the kinetic energy of the transmission shaft 20 is consumed, and the auxiliary braking effect is further exerted on the wheel end of the vehicle.
When the vehicle brake pedal is not operated, the clutch 60 controls the input end of the speed reducer 30 to be disconnected with the transmission shaft 20, no power is transmitted to a main shaft of the hydraulic pump 40 at this time, the hydraulic pump 40 is in a non-working state, the displacement is zero, the hydraulic auxiliary brake system is in a non-working state, no load is added on the transmission shaft 20, at this time, the transmission shaft 20 idles along with wheels, and the vehicle runs normally.
Compared with the prior art, the pressure auxiliary braking system disclosed by the invention has the advantages that when the vehicle brake pedal acts, the hydraulic pump is started along with the transmission shaft, the hydraulic pump applies work to oil in the hydraulic oil tank, and the load is rapidly added to the transmission shaft, so that the kinetic energy of the transmission shaft is consumed, the wheel end kinetic energy of the vehicle is further consumed, the impact force generated by a non-driving axle to the vehicle during braking is reduced, the braking distance is shortened, the braking performance of the vehicle is improved, the loss of a friction plate is reduced, and the brake pad of the vehicle braking system is protected.
The speed reducer 30 of the present invention is a gear speed reducer, and its transmission assembly includes an input end gear 320, an output end gear 33, and a gear set located in the installation cavity, wherein the input end gear 320 and the output end gear 33 are both pivoted in the housing 31, or the input end gear 320 is pivoted in the axle 10 or pivoted between the axle 10 and the housing 31, the gear set is coupled between the output end gear 320 and the output end gear 33, the specific gear set is respectively engaged with the input end gear 320 and the output end gear 33, the clutch 60 is coupled between the input end gear 320 and one end of the transmission shaft 20 near the middle of the axle 10, the housing of the hydraulic pump 40 is fixedly connected to the housing 31, and the main shaft of the hydraulic pump 40 is synchronously coupled with the output end gear 33.
The clutch 60 includes a plurality of first friction plates 62, a plurality of second friction plates 61, a pressing spring 63, and a pushing member 67, wherein the plurality of first friction plates 62 and the plurality of second friction plates 61 are arranged at intervals to form a friction plate assembly, the first friction plates 62 and the second friction plates 61 are annular, the inner edge of the first friction plates 62 and the outer edge of the transmission shaft 20 are provided with mutually matched splines so as to synchronously couple the first friction plates 62 and the transmission shaft 20, the outer edge of the second friction plates 61 is provided with a flange, a concave position for embedding the flange is arranged on the input end gear 320, so that the second friction plates 61 and the input end gear are synchronously coupled, the friction plate assembly is arranged between the pressing spring 63 and the input end gear 320, specifically, one side of the friction plate assembly is abutted against the input end gear, and the other side is pressed by the pressing spring 63, the pushing piece 67 is located on one side of the jacking elastic piece 63, which is far away from the friction piece assembly, and is used for pushing the jacking elastic piece 63 so that the jacking elastic piece 63 applies elastic stress to the friction piece assembly, namely the pushing piece 67 pushes the jacking elastic piece 63, the jacking elastic piece 63 deforms and presses the friction piece assembly tightly, the first friction pieces 62 and the second friction pieces 61 are pressed tightly, and a large friction force is generated, so that the transmission shaft 20 and the input end gear 320 can be synchronously connected; when the power transmission between the transmission shaft 20 and the input gear 320 needs to be disconnected, the pushing member 67 moves in a direction away from the pressing spring plate 63, and the first friction plates 62 and the second friction plates 61 are released, so that the transmission shaft 20 and the input gear 320 can rotate relatively. The pushing member 67 may be a brake pedal controlled by a vehicle, for example, when the brake pedal of the vehicle acts, a signal is transmitted to a motor or other type of driving unit that drives the pushing member 67 to act, the pushing member 67 is driven to move along the axial direction of the transmission shaft 20 to push against the elastic sheet 63, and after the brake pedal is reset, the driving unit is controlled by the signal to reset the pushing member 67.
In the present invention, in order to realize the fast response of the clutch 60 and enable the hydraulic auxiliary braking system to be inserted fast during the braking of the vehicle, the present invention preferably utilizes a hydraulic driving mode to drive the pushing member 67 to move so as to press the first friction plate 62 and the second friction plate 61, specifically, a piston 66 is sleeved on the transmission shaft 20, a fixed sleeve 65 is fixed inside the axle 10, the fixed sleeve 65 is sleeved outside the piston 66 and is in close fit with the piston, a sealed cavity is enclosed between the fixed sleeve 65 and the piston 66, thus, a hydraulic cylinder is formed by the fixed sleeve 65 and the piston 66, a channel is arranged on the fixed sleeve 65, one end of the channel extends to the outer surface of the axle 10, the other end of the channel extends to the sealed cavity, one end of the channel extending to the outer surface of the axle 10 is communicated with the hydraulic system of the vehicle, the pushing member 67 is in a hollow column structure, the hydraulic auxiliary brake system is sleeved on the transmission shaft 20 in a sliding mode, two ends of the pushing piece 67 are abutted to the jacking elastic piece 63 and the piston 66 respectively, when a vehicle brakes, the hydraulic brake system of the vehicle distributes a minimum part of liquid pressure to the hydraulic auxiliary brake system of the invention through the channels, the piston 66 is used for driving the pushing piece 67 to move, so that the transmission shaft 20 and the input end gear 320 are connected synchronously, the clutch 60 can correspond quickly, the response time of the hydraulic auxiliary brake system is shortened, and the response of the hydraulic auxiliary brake system can intervene timely to participate in the braking process of the vehicle. An oil inlet nozzle 64 may be fixed on the axle 20 or the housing 31 of the speed reducer 30, the oil inlet nozzle 64 extends into the axle 10 and is connected to the fixing sleeve 65, a through hole is provided on the fixing sleeve 65, the through hole communicates the oil path of the oil inlet nozzle 64 with the sealed cavity, that is, the through hole and the oil path inside the oil inlet nozzle 64 form the above-mentioned channel.
For the convenience of installation, the input end gear 320 of the present invention includes a fixed seat 34, a ring gear 32, and an end cover 35, wherein the fixed seat 34 and the end cover 35 are both ring-shaped, and the end cover 35 is fixed on the fixed seat 34 by bolts, one end of the transmission shaft 20 near the middle of the axle 10 sequentially passes through the end cover 35 and the fixed seat 34, the ring gear 32 is engaged with a gear set of the reducer 30 connected to the outer edge of the fixed seat 34, a mounting groove is formed between the end cover 35 and the fixed seat 34, the friction plate assembly is placed in the mounting groove, and the pressing elastic piece 63 can also be placed in the mounting groove, two side walls of the mounting groove are respectively located on the fixed seat 34 and the end cover 35, wherein one side of the friction plate assembly is abutted against the mounting groove located on the side wall of the fixed seat 34, the pressing elastic piece 63 is located between the side wall of the end cover 35 and the friction plate assembly, and a gap is formed between the end cover 35 and the transmission shaft 20, one end of the pushing piece 67 close to the friction plate assembly passes through the gap and abuts against the jacking spring piece 63. During installation, the friction plate assembly and the abutting spring piece 63 can be arranged between the end cover 35 and the fixed seat 34, and the end cover 35 and the fixed seat 34 are fixed by using bolts, so that an assembly is formed and is assembled with other components.
The clutch 60 described above can respond quickly when the vehicle is braked, and in fact, in other embodiments, the clutch of the present invention may adopt other structures to realize the coupling and decoupling of the transmission shaft 20 and the input gear 320.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (7)
1. The hydraulic auxiliary braking system of the vehicle is characterized by comprising an axle, a transmission shaft, a speed reducer, a clutch, a hydraulic pump, a hydraulic oil tank and a control valve, wherein the axle is of a hollow structure, the shell of the speed reducer is fixedly connected to the axle, the transmission shaft is arranged in the axle, and one end of the transmission shaft extends to the end part of the axle; the clutch is connected between the other end of the transmission shaft and the input end of the speed reducer to connect or disconnect the other end of the transmission shaft and the input end of the speed reducer, and the main shaft of the hydraulic pump is connected with the output end of the speed reducer; the oil inlet of the hydraulic pump is communicated with the hydraulic oil tank, the oil outlet of the hydraulic oil pump is communicated with the inlet of the control valve, and the outlet of the control valve is communicated with the hydraulic oil tank to form a hydraulic loop.
2. A hydraulic auxiliary brake system for a vehicle according to claim 1 wherein the housing of the speed reducer and the central portion of the axle together define a mounting cavity, the speed reducer including a transmission assembly located within the mounting cavity, the transmission assembly including an input gear pivotally received within the housing, an output gear pivotally received within the housing, and a gear train coupled between the input gear and the output gear, the clutch being coupled between an end of the transmission shaft adjacent the central portion of the axle and the input gear, the hydraulic pump being synchronously coupled to the output gear.
3. A hydraulic auxiliary brake system for a vehicle as claimed in claim 2, wherein the clutch includes a plurality of first friction plates, a plurality of second friction plates, a biasing spring, and a pushing member, the plurality of first friction plates and the plurality of second friction plates are arranged at intervals to form a friction plate assembly, the first friction plates are synchronously coupled to the transmission shaft, the second friction plates are synchronously coupled to the input gear, one side of the friction plate assembly abuts against the input gear, the biasing spring is pressed against the other side of the friction plate assembly, and the pushing member is configured to push the biasing spring so that the biasing spring applies elastic stress to the friction plate assembly.
4. A hydraulic auxiliary brake system for a vehicle as claimed in claim 3, wherein the transmission shaft is sleeved with a piston, the axle is fixed with a fixed sleeve, the fixed sleeve is tightly fitted with the piston, a sealed cavity is defined between the fixed sleeve and the piston, the fixed sleeve is provided with a channel, one end of the channel extends to the outer surface of the axle, and the other end of the channel extends to the sealed cavity; the pushing piece is sleeved on the transmission shaft in a sliding mode, and two ends of the pushing piece are respectively abutted to the jacking elastic piece and the piston.
5. A hydraulic auxiliary brake system for vehicles according to claim 3, wherein the input gear comprises a fixed seat, a gear ring connected to the outer edge of the fixed seat, and an end cover connected to the fixed seat, one end of the transmission shaft near the middle of the axle sequentially passes through the end cover and the fixed seat, an installation groove is formed between the fixed seat and the end cover, the friction plate assembly is disposed in the installation groove, one side of the friction plate assembly abuts against one side wall of the installation groove, and the jacking elastic piece is disposed between one side wall of the installation groove and the friction plate assembly; a gap is formed between the end cover and the transmission shaft, and one end of the pushing piece close to the jacking elastic piece penetrates through the gap to be abutted against the jacking elastic piece.
6. A hydraulically assisted brake system for vehicles according to claim 1, characterized in that the hydraulic reservoir is fixedly mounted on the axle.
7. A hydraulically assisted brake system for vehicles according to claim 1, characterized in that the housing of the hydraulic pump is fixedly connected to the housing of the retarder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010562568.8A CN113815587A (en) | 2020-06-18 | 2020-06-18 | Hydraulic auxiliary brake system of vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010562568.8A CN113815587A (en) | 2020-06-18 | 2020-06-18 | Hydraulic auxiliary brake system of vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113815587A true CN113815587A (en) | 2021-12-21 |
Family
ID=78924566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010562568.8A Pending CN113815587A (en) | 2020-06-18 | 2020-06-18 | Hydraulic auxiliary brake system of vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113815587A (en) |
-
2020
- 2020-06-18 CN CN202010562568.8A patent/CN113815587A/en active Pending
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