CN110979276A - Parking brake mechanism and gear mechanism linkage device of vehicle - Google Patents

Parking brake mechanism and gear mechanism linkage device of vehicle Download PDF

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Publication number
CN110979276A
CN110979276A CN201911385310.9A CN201911385310A CN110979276A CN 110979276 A CN110979276 A CN 110979276A CN 201911385310 A CN201911385310 A CN 201911385310A CN 110979276 A CN110979276 A CN 110979276A
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China
Prior art keywords
reversing valve
hydraulic
port
valve
communicated
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CN201911385310.9A
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Chinese (zh)
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袁菊花
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Individual
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Individual
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Priority to CN201911385310.9A priority Critical patent/CN110979276A/en
Publication of CN110979276A publication Critical patent/CN110979276A/en
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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
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/08—Brake-action initiating means for personal initiation hand actuated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K20/00—Arrangement or mounting of change-speed gearing control devices in vehicles
    • B60K20/02—Arrangement or mounting of change-speed gearing control devices in vehicles of initiating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K23/00—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for
    • B60K23/02—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for main transmission clutches
    • 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
    • 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
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/08—Brake-action initiating means for personal initiation hand actuated
    • B60T7/10—Disposition of hand control

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

A linkage device of a parking brake mechanism and a gear mechanism of a vehicle comprises a parking brake, a parking hydraulic cylinder, a first manual reversing valve, a forward gear clutch, a backward gear clutch, a hydraulic pump, an oil tank, a second manual reversing valve, a first hydraulic control reversing valve and a second hydraulic control reversing valve; an execution port of the first manual reversing valve is respectively communicated with a first oil inlet of the first hydraulic control reversing valve and a first control port of the second hydraulic control reversing valve; an execution port of the second manual reversing valve is respectively communicated with a second oil inlet of the first hydraulic control reversing valve, a control port of the first hydraulic control reversing valve and a second control port of the second hydraulic control reversing valve; an execution port of the first hydraulic control reversing valve is communicated with the parking hydraulic cylinder; an execution port of the second hydraulic control reversing valve is communicated with the forward gear clutch, and an execution port of the second hydraulic control reversing valve is communicated with the backward gear clutch. The invention can automatically engage the forward gear when the front end part of the cab releases the parking brake, and automatically engage the reverse gear when the rear end part of the cab releases the parking brake.

Description

Parking brake mechanism and gear mechanism linkage device of vehicle
Technical Field
The invention relates to a vehicle, in particular to a linkage device of a parking brake mechanism and a gear mechanism of the vehicle.
Background
Some vehicles need to run in a roadway with a small section, turning around is very inconvenient when the vehicles run in the roadway, long-distance forward and backward driving is needed under the condition that the vehicles cannot turn around, and the vehicles need to have a bidirectional driving function in order to improve driving comfort and safety. In a vehicle having a bidirectional driving function, a cab is required to be provided in each of a front end portion and a rear end portion of the vehicle, and a driver is required to operate a parking brake in both the cab in the front end portion and the cab in the rear end portion. As shown in fig. 3, the parking brake mechanism of the prior art can only meet the requirement of one-way driving, and comprises a hydraulic pump 63, a parking brake 30, a parking hydraulic cylinder 31 and a manual reversing valve 32; the parking brake 30 comprises a plurality of moving plates 30-1 and a plurality of static plates 30-2; the moving plates 30-1 and the static plates 30-2 are arranged alternately; the right end of a piston rod 31-1 of the parking hydraulic cylinder 31 is abutted against or separated from the moving plate 30-1. An oil inlet P of the manual reversing valve 32 is communicated with the hydraulic pump 63, and an execution port A of the manual reversing valve 32 is communicated with a rod cavity of the parking hydraulic cylinder 31. The oil outlet T of the manual reversing valve 32 is communicated with an oil tank 64 on the vehicle. When the vehicle starts to run, the parking brake needs to be released, a driver can operate the manual reversing valve 32 to enable an oil inlet P of the manual reversing valve 32 to be communicated with the execution port A, pressure oil in the hydraulic pump 63 reaches a rod cavity of the parking hydraulic cylinder 31 through the manual reversing valve 32, a piston rod of the parking hydraulic cylinder 31 moves leftwards to separate the movable plate 30-1 from the fixed plate 30-2, and the vehicle is in a parking brake releasing state and starts to run. When the vehicle needs to be braked in a parking mode, the manual reversing valve 32 is operated, an execution port A of the manual reversing valve 32 is communicated with an oil outlet T, pressure oil in a rod cavity of the parking hydraulic cylinder 31 returns to an oil tank 64 through the oil outlet T of the manual reversing valve 32, a piston rod of the parking hydraulic cylinder 31 moves rightwards under the action of a spring to enable a movable piece 30-1 to be combined with a fixed piece 30-2, and the vehicle is in a parking brake state. The parking brake device used in the background art of the parking brake system for a heavy-duty forklift disclosed in chinese patent document CN201633718U (application No. 201020153354.7) belongs to the parking brake mechanism for the vehicle described above.
The gear mechanism of the one-way driving vehicle in the prior art is shown in fig. 2 and comprises a gear selecting operation valve 60, a forward gear clutch 61, a reverse gear clutch 62, a hydraulic pump 63 and an oil tank 64, wherein an oil inlet of the hydraulic pump 63 is communicated with the oil tank 64, and an oil outlet of the hydraulic pump 63 is communicated with an oil inlet P of the gear selecting operation valve 60; the gear selection operating valve 60 includes an operating lever 60-1, an execution port a of the gear selection operating valve 60 is communicated with a forward clutch 61, an execution port B of the gear selection operating valve 60 is communicated with a reverse clutch 62, and the operating lever 60-1 of the gear selection operating valve 60 is connected with a gear selector located in a cab through a flexible shaft. When a driver operates a gear selector positioned in a cab to be hung on a forward gear, a flexible shaft drives an operating lever 60-1 of a gear selecting operating valve 60 to move, so that an oil inlet P of the gear selecting operating valve 60 is communicated with an execution port A, pressure oil in a hydraulic pump 63 enters a forward gear clutch 61, the forward gear clutch 61 is combined, and a vehicle is hung on the forward gear; when the driver operates the gear selector in the cab to be hooked on the reverse gear, the flexible shaft drives the operating lever 60-1 of the gear selecting operating valve 60 to move, so that the oil inlet P of the gear selecting operating valve 60 is communicated with the execution port B, the pressure oil in the hydraulic pump 63 enters the reverse gear clutch 62, the reverse gear clutch 62 is combined, and the vehicle is hooked on the reverse gear. When a driver operates a gear selector of a cab to hang the gear selector on a neutral gear, the flexible shaft drives an operating lever 60-1 of the gear selecting operating valve 60 to move, and an oil inlet P of the gear selecting operating valve 60 is not communicated with an execution port A and an execution port B.
Both the parking brake mechanism and the shift mechanism in the prior art cannot meet the requirement of bidirectional driving, and cannot realize automatic engagement of a forward gear when the parking brake is released in the cab at the front end portion, and automatic engagement of a reverse gear (equivalent to a forward gear of the cab at the rear end portion) when the parking brake is released in the cab at the rear end portion.
Disclosure of Invention
The invention aims to provide a parking brake mechanism and gear mechanism linkage device of a vehicle, which can meet the requirement of bidirectional driving, automatically engage a forward gear when a parking brake is released in a cab at the front end part, and automatically engage a backward gear when the parking brake is released in the cab at the rear end part.
In order to achieve the purpose, the invention adopts the following technical scheme: a linkage device of a parking brake mechanism and a gear mechanism of a vehicle comprises a parking brake, a parking hydraulic cylinder, a first manual reversing valve, a forward gear clutch, a backward gear clutch, a hydraulic pump and an oil tank; the parking brake comprises a plurality of moving plates and a plurality of static plates; the moving plates and the static plates are arranged alternately; the right end of a piston rod of the parking hydraulic cylinder is abutted against or separated from the moving plate; and an oil inlet of the hydraulic pump is communicated with the oil tank.
The hydraulic reversing valve also comprises a second manual reversing valve, a first hydraulic control reversing valve and a second hydraulic control reversing valve; an oil outlet of the hydraulic pump is respectively communicated with an oil inlet P of the first manual reversing valve, an oil inlet P of the second manual reversing valve and an oil inlet P of the second hydraulic control reversing valve; the execution port A of the first manual reversing valve is communicated with a first oil inlet P1 of the first hydraulic control reversing valve and a first control port K1 of the second hydraulic control reversing valve respectively; the execution port A of the second manual reversing valve is respectively communicated with a second oil inlet P2 of the first hydraulic control reversing valve, a control port K of the first hydraulic control reversing valve and a second control port K2 of the second hydraulic control reversing valve; the execution port A of the first hydraulic control reversing valve is communicated with a rod cavity of the parking hydraulic cylinder; and an execution port A of the second hydraulic control reversing valve is communicated with the forward gear clutch, and an execution port B of the second hydraulic control reversing valve is communicated with the reverse gear clutch.
Also includes a safety valve; the safety valve is arranged on an oil channel from an oil outlet of the hydraulic pump to the oil tank.
The device also comprises a filter; the filter is arranged on an oil channel from the oil tank to an oil inlet of the hydraulic pump.
The invention has the following positive effects: (1) the oil outlet of the hydraulic pump is respectively communicated with the oil inlet P of the first manual reversing valve, the oil inlet P of the second manual reversing valve and the oil inlet P of the second hydraulic control reversing valve; an execution port A of the first manual reversing valve is communicated with a first oil inlet P1 of the first hydraulic control reversing valve and a first control port K1 of the second hydraulic control reversing valve respectively; an execution port A of the second manual reversing valve is respectively communicated with a second oil inlet P2 of the first hydraulic control reversing valve, a control port K of the first hydraulic control reversing valve and a second control port K2 of the second hydraulic control reversing valve; an execution port A of the first hydraulic control reversing valve is communicated with a rod cavity of the parking hydraulic cylinder; the execution port A of the second hydraulic control reversing valve is communicated with the forward gear clutch, the execution port B of the second hydraulic control reversing valve is communicated with the reverse gear clutch, therefore, when a driver needs to relieve parking brake in a cab at the front end, the first manual reversing valve is operated, the oil inlet P port of the first manual reversing valve is communicated with the execution port A, pressure oil in the hydraulic pump can reach a rod cavity of the parking hydraulic cylinder through the first manual reversing valve and the first oil inlet P1 of the first hydraulic control reversing valve, a piston rod of the parking hydraulic cylinder moves leftwards to separate a moving piece from a static piece, and the vehicle is in a parking brake release state. Meanwhile, pressure oil in the hydraulic pump can reach a first control port K1 of a second hydraulic control reversing valve through a first manual reversing valve, an oil inlet P of the second hydraulic control reversing valve is communicated with an execution port A, the pressure oil in the hydraulic pump can reach a forward gear clutch through the second hydraulic control reversing valve, the forward gear clutch is combined, and a vehicle is hung on a forward gear, namely, a driver can automatically hang the forward gear when the parking brake is released in a cab at the front end part. Therefore, after the driver releases the parking brake in the cab at the front end, the driver does not need to manually engage the forward gear, and the parking brake is very convenient. When a driver needs to release parking braking in a cab at the rear end part, the second manual directional control valve is operated, so that an oil inlet P of the second manual directional control valve is communicated with an execution port A, pressure oil is introduced into a control port K of the first hydraulic directional control valve, a second oil inlet P2 of the first hydraulic directional control valve is communicated with the execution port A, the pressure oil in the hydraulic pump can reach a rod cavity of the parking hydraulic cylinder through the second manual directional control valve and a second oil inlet P2 of the first hydraulic directional control valve, a piston rod of the parking hydraulic cylinder moves leftwards to separate a moving blade from a static blade, and the vehicle is in a parking braking release state. Meanwhile, pressure oil in the hydraulic pump can reach a second control port K2 of the second hydraulic control reversing valve through the second manual reversing valve, an oil inlet P of the second hydraulic control reversing valve is communicated with an execution port B, the pressure oil in the hydraulic pump can reach a reverse gear clutch through the second hydraulic control reversing valve, the reverse gear clutch is combined, and a vehicle is hung on the reverse gear, namely, a driver can automatically hang the reverse gear (equivalent to a forward gear of a cab at the rear end part) when the parking brake is released in the cab at the rear end part. Thus, it is very convenient for the driver to release the parking brake in the cab at the rear end portion without manually engaging the reverse gear (corresponding to the forward gear of the cab at the rear end portion).
Drawings
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is a prior art gear mechanism;
fig. 3 is a prior art parking brake mechanism.
The reference numbers in the above figures are as follows: the hydraulic control system comprises a second manual reversing valve 1, a first hydraulic control reversing valve 2, a second hydraulic control reversing valve 3, a parking brake 30, a movable plate 30-1, a fixed plate 30-2, a parking hydraulic cylinder 31, a first manual reversing valve 32, a gear selecting operation valve 60, an operating rod 60-1, a forward gear clutch 61, a reverse gear clutch 62, a hydraulic pump 63, an oil tank 64, a safety valve 65 and a filter 66.
Detailed Description
The invention is further described below with reference to the accompanying drawings and the examples given.
As shown in fig. 1, a parking brake mechanism and gear mechanism linkage of a vehicle includes a parking brake 30, a parking hydraulic cylinder 31, a first manual direction changing valve 32, a forward clutch 61, a reverse clutch 62, a hydraulic pump 63, and an oil tank 64; the parking brake 30 comprises a plurality of moving plates 30-1 and a plurality of static plates 30-2; the moving plates 30-1 and the static plates 30-2 are arranged alternately; the right end of the piston rod of the parking hydraulic cylinder 31 is abutted against or separated from the moving plate 30-1; an oil inlet of the hydraulic pump 63 is communicated with an oil tank 64.
The hydraulic reversing valve also comprises a second manual reversing valve 1, a first hydraulic control reversing valve 2 and a second hydraulic control reversing valve 3; an oil outlet of the hydraulic pump 63 is respectively communicated with an oil inlet P of the first manual reversing valve 32, an oil inlet P of the second manual reversing valve 1 and an oil inlet P of the second hydraulic control reversing valve 3; the execution port A of the first manual reversing valve 32 is communicated with a first oil inlet P1 of the first hydraulic control reversing valve 2 and a first control port K1 of the second hydraulic control reversing valve 3 respectively; the execution port A of the second manual reversing valve 1 is respectively communicated with a second oil inlet P2 of the first hydraulic control reversing valve 2, a control port K of the first hydraulic control reversing valve 2 and a second control port K2 of the second hydraulic control reversing valve 3; the execution port A of the first hydraulic control reversing valve 2 is communicated with a rod cavity of the parking hydraulic cylinder 31; the actuation port a of the second hydraulic directional control valve 3 communicates with the forward clutch 61, and the actuation port B of the second hydraulic directional control valve 3 communicates with the reverse clutch 62. When pressure oil is introduced into a control port K of the first hydraulic control reversing valve 2, a second oil inlet P2 port of the first hydraulic control reversing valve 2 is communicated with an execution port A; when the control port K of the first hydraulic control reversing valve 2 is not filled with pressure oil, the first oil inlet P1 port of the first hydraulic control reversing valve 2 is communicated with the execution port A. When pressure oil is introduced into the first control port K1 of the second hydraulic control reversing valve 3, the oil inlet P of the second hydraulic control reversing valve 3 is communicated with the execution port A; when the second control port K2 of the second hydraulic control reversing valve 3 is filled with pressure oil, the oil inlet P of the second hydraulic control reversing valve 3 is communicated with the execution port B.
Also included is a safety valve 65; the relief valve 65 is provided on an oil passage from an oil outlet of the hydraulic pump 63 to the oil tank 64.
A filter 66 is also included; the filter 66 is provided on an oil passage from the oil tank 64 to an oil inlet of the hydraulic pump 63.
In use, the first manual direction valve 32 is installed in the cab at the front end of the vehicle, and the second manual direction valve 1 is installed in the cab at the rear end of the vehicle. When a driver works in the cab at the front end (namely, parking brake is carried out or the parking brake is released), the second manual reversing valve 1 in the cab at the rear end is placed at a parking brake position (namely, a position where an execution port A of the second manual reversing valve 1 is communicated with an oil return port T); when the driver works in the cab at the rear end portion (i.e., performs parking brake or releases the parking brake), the first manual direction valve 32 in the cab at the front end portion is placed in a parking brake position (i.e., the actuation port a of the first manual direction valve 32 communicates with the oil return port T).
The working principle of the invention is as follows: when a driver needs to work in the cab at the front end, at this time, the execution port a of the second manual directional control valve 1 in the cab at the rear end is communicated with the oil return port T (that is, the second manual directional control valve 1 is placed at a parking brake position), at this time, the execution port a of the second manual directional control valve 1 does not have pressure oil, the control port K of the first hydraulic directional control valve 2 does not have pressure oil, the first oil inlet P1 port of the first hydraulic directional control valve 2 is communicated with the execution port a, when the driver needs to release the parking brake in the cab at the front end, the first manual directional control valve 32 is operated to communicate the oil inlet P port of the first manual directional control valve 32 with the execution port a, the pressure oil in the hydraulic pump 63 can pass through the first manual directional control valve 32 and then pass through the first hydraulic directional control valve 2 first oil inlet P1 to reach the rod cavity of the parking hydraulic cylinder 31, the piston rod of the parking hydraulic cylinder 31 moves leftward to separate the movable plate 30-1 from the fixed plate 30-2, the vehicle is in a parking brake released state. Meanwhile, the pressure oil in the hydraulic pump 63 can also reach the first control port K1 of the second hydraulic control directional control valve 3 through the first manual directional control valve 32, the oil inlet P of the second hydraulic control directional control valve 3 is communicated with the execution port a, the pressure oil in the hydraulic pump 63 can reach the forward gear clutch 61 through the second hydraulic control directional control valve 3, the forward gear clutch 61 is combined, and the vehicle is hung on the forward gear, namely, the driver can automatically hang the forward gear when the parking brake is released in the cab at the front end part. Therefore, after the driver releases the parking brake in the cab at the front end, the driver does not need to manually engage the forward gear, and the parking brake is very convenient. When a driver needs to perform parking braking, only the first manual directional control valve 32 is operated to enable the execution port A of the first manual directional control valve 32 to be communicated with the oil return port T, at the moment, the second manual directional control valve 1 positioned in the cab at the rear end part is still at the position where the execution port A is communicated with the oil return port T (namely, the second manual directional control valve 1 is positioned at the parking braking position), the execution port A of the second manual directional control valve 1 does not have pressure oil, the control port K of the first hydraulic directional control valve 2 still does not have pressure oil, the first oil inlet P1 port of the first hydraulic directional control valve 2 is communicated with the execution port A, at the moment, the pressure oil of a rod cavity of the parking hydraulic cylinder 31 passes through the first oil inlet P1 of the first hydraulic directional control valve 2 and then passes through the oil return port T of the first manual directional control valve 32 to reach the oil tank 64, the piston rod of the parking hydraulic cylinder 31 moves rightwards under the action of a spring to enable the movable blade 30-1 to be combined, the vehicle is in a parking brake state. Meanwhile, the pressure oil in the first control port K1 of the second hydraulic directional control valve 3 can also reach the oil tank 64 through the oil return port T of the first manual directional control valve 32, i.e., the first control port K1 of the second hydraulic directional control valve 3 does not have pressure oil, the oil inlet P of the second hydraulic directional control valve 3 is not communicated with the execution port a and the execution port B, the pressure oil in the hydraulic pump 63 cannot reach the forward clutch 61 or the reverse clutch 62, and the vehicle is hung on the neutral gear, i.e., the driver can be automatically hung on the neutral gear when parking braking is performed in the cab at the front end.
When the driver needs to work in the cab at the rear end portion, the actuation port a of the first manual direction valve 32 located in the cab at the front end portion at this time communicates with the oil return port T (i.e., the first manual direction valve 32 is placed in the parking brake position). When the parking brake needs to be released, the second manual directional control valve 1 is operated, so that the oil inlet P of the second manual directional control valve 1 is communicated with the execution port A, at this time, pressure oil is introduced into the control port K of the first hydraulic control directional control valve 2, the second oil inlet P2 of the first hydraulic control directional control valve 2 is communicated with the execution port A, the pressure oil in the hydraulic pump 63 can reach the rod cavity of the parking hydraulic cylinder 31 through the second manual directional control valve 1 and then through the second oil inlet P2 of the first hydraulic control directional control valve 2, the piston rod of the parking hydraulic cylinder 31 moves leftwards to separate the movable plate 30-1 from the fixed plate 30-2, and the vehicle is in a parking brake release state. Meanwhile, the pressure oil in the hydraulic pump 63 can reach the second control port K2 of the second hydraulic control directional control valve 3 through the second manual directional control valve 1, the oil inlet P of the second hydraulic control directional control valve 3 is communicated with the execution port B, the pressure oil in the hydraulic pump 63 can reach the reverse gear clutch 62 through the second hydraulic control directional control valve 3, the reverse gear clutch 62 is combined, and the vehicle is hung on the reverse gear, namely, the reverse gear (equivalent to the forward gear of the cab at the rear end part) can be automatically hung when the driver releases the parking brake in the cab at the rear end part. Thus, it is very convenient for the driver to release the parking brake in the cab at the rear end portion without manually engaging the reverse gear (corresponding to the forward gear of the cab at the rear end portion). When the driver needs to perform parking braking in the rear end portion of the cab, the actuation port a of the first manual direction valve 32 located in the front end portion of the cab at this time communicates with the oil return port T (i.e., the first manual direction valve 32 is placed in the parking braking position). At this time, a driver only needs to operate the second manual reversing valve 1 installed in a cab at the rear end of the vehicle, so that the execution port A of the second manual reversing valve 1 is communicated with the oil return port T, at this time, pressure oil is not introduced into the control port K of the first hydraulic control reversing valve 2, the first oil inlet P1 port of the first hydraulic control reversing valve 2 is communicated with the execution port A, the pressure oil in the rod cavity of the parking hydraulic cylinder 31 passes through the first oil inlet P1 port of the first hydraulic control reversing valve 2 and then reaches the oil tank 64 through the oil return port T of the first manual reversing valve 32, the piston rod of the parking hydraulic cylinder 31 moves rightwards under the action of the spring to enable the moving piece 30-1 to be combined with the fixed piece 30-2, and the vehicle is in a parking braking state. Meanwhile, the pressure oil in the second control port K2 of the second hydraulic directional control valve 3 can also reach the oil tank 64 through the oil return port T of the second manual directional control valve 1, i.e., the second control port K2 of the second hydraulic directional control valve 3 does not have pressure oil, the oil inlet P of the second hydraulic directional control valve 3 is not communicated with the execution port a and the execution port B, the pressure oil in the hydraulic pump 63 cannot reach the forward clutch 61 or the reverse clutch 62, and the vehicle is hung on the neutral gear, i.e., the driver can be automatically hung on the neutral gear when parking braking is performed in the cab at the rear end.

Claims (3)

1. A linkage device of a parking brake mechanism and a gear mechanism of a vehicle comprises a parking brake (30), a parking hydraulic cylinder (31), a first manual reversing valve (32), a forward gear clutch (61), a reverse gear clutch (62), a hydraulic pump (63) and an oil tank (64); the parking brake (30) comprises a plurality of moving plates (30-1) and a plurality of static plates (30-2); the moving plates (30-1) and the static plates (30-2) are arranged alternately; the right end of a piston rod of the parking hydraulic cylinder (31) is abutted against or separated from the moving plate (30-1); an oil inlet of the hydraulic pump (63) is communicated with an oil tank (64); the method is characterized in that:
the hydraulic reversing valve also comprises a second manual reversing valve (1), a first hydraulic control reversing valve (2) and a second hydraulic control reversing valve (3); an oil outlet of the hydraulic pump (63) is respectively communicated with an oil inlet P of the first manual directional control valve (32), an oil inlet P of the second manual directional control valve (1) and an oil inlet P of the second hydraulic directional control valve (3); an execution port A of the first manual reversing valve (32) is communicated with a first oil inlet P1 of the first hydraulic control reversing valve (2) and a first control port K1 of the second hydraulic control reversing valve (3) respectively; an execution port A of the second manual reversing valve (1) is respectively communicated with a second oil inlet P2 of the first hydraulic control reversing valve (2), a control port K of the first hydraulic control reversing valve (2) and a second control port K2 of the second hydraulic control reversing valve (3); an execution port A of the first hydraulic control reversing valve (2) is communicated with a rod cavity of the parking hydraulic cylinder (31); an execution port A of the second hydraulic control reversing valve (3) is communicated with the forward gear clutch (61), and an execution port B of the second hydraulic control reversing valve (3) is communicated with the reverse gear clutch (62).
2. The parking brake mechanism and shift mechanism linkage of a vehicle according to claim 1, wherein: also comprises a safety valve (65); the safety valve (65) is arranged on an oil passage from an oil outlet of the hydraulic pump (63) to the oil tank (64).
3. The parking brake mechanism and shift mechanism linkage of a vehicle according to claim 1, wherein: further comprising a filter (66); the filter (66) is disposed on an oil passage from the oil tank (64) to an oil inlet of the hydraulic pump (63).
CN201911385310.9A 2019-12-28 2019-12-28 Parking brake mechanism and gear mechanism linkage device of vehicle Withdrawn CN110979276A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911385310.9A CN110979276A (en) 2019-12-28 2019-12-28 Parking brake mechanism and gear mechanism linkage device of vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911385310.9A CN110979276A (en) 2019-12-28 2019-12-28 Parking brake mechanism and gear mechanism linkage device of vehicle

Publications (1)

Publication Number Publication Date
CN110979276A true CN110979276A (en) 2020-04-10

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Application Number Title Priority Date Filing Date
CN201911385310.9A Withdrawn CN110979276A (en) 2019-12-28 2019-12-28 Parking brake mechanism and gear mechanism linkage device of vehicle

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CN (1) CN110979276A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114261421A (en) * 2021-11-18 2022-04-01 中车株洲电力机车有限公司 Hydraulic transmission manual release auxiliary mechanism and method for parking brake cylinder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114261421A (en) * 2021-11-18 2022-04-01 中车株洲电力机车有限公司 Hydraulic transmission manual release auxiliary mechanism and method for parking brake cylinder
CN114261421B (en) * 2021-11-18 2023-01-20 中车株洲电力机车有限公司 Hydraulic transmission manual release auxiliary mechanism and method for parking brake cylinder

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