CN114932891B - Bidirectional driving explosion-proof vehicle parking brake quick response device - Google Patents
Bidirectional driving explosion-proof vehicle parking brake quick response device Download PDFInfo
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- CN114932891B CN114932891B CN202210458614.9A CN202210458614A CN114932891B CN 114932891 B CN114932891 B CN 114932891B CN 202210458614 A CN202210458614 A CN 202210458614A CN 114932891 B CN114932891 B CN 114932891B
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- valve
- oil
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- quick response
- parking brake
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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
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/04—Driver's valves
- B60T15/041—Driver's valves controlling auxiliary pressure brakes, e.g. parking or emergency brakes
-
- 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
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/36—Other control devices or valves characterised by definite functions
- B60T15/42—Other control devices or valves characterised by definite functions with a quick braking action, i.e. with accelerating valves actuated by brake-pipe pressure variation
Abstract
The invention belongs to the technical field of parking brake control of mining explosion-proof bidirectional driving vehicles, and particularly relates to a parking brake quick response device of a bidirectional driving explosion-proof vehicle; the hydraulic system comprises a parking brake and a hydraulic system for controlling the parking brake, wherein a control valve of the hydraulic system comprises a front cab hand brake valve and a rear cab hand brake valve, and the front cab hand brake valve and the rear cab hand brake valve are connected through a quick response valve; the quick response valve is provided with a valve seat reset through a spring and four oil ports communicated with each other; the first oil port is connected with a parking brake through a plurality of hydraulic elements, the second oil port and the fourth oil port are respectively connected with an A port and a P port of a rear cab hand brake valve, and the third oil port is connected with an A port of a front cab hand brake valve; the vehicle brake is applied to all mining bidirectional driving explosion-proof vehicles, the problem that the bidirectional driving vehicle slides on a slope due to the fact that parking brake is delayed due to the particularity of the bidirectional driving vehicle is solved, and the vehicle is safer and more reliable to use.
Description
Technical Field
The invention belongs to the technical field of parking brake control of mining explosion-proof bidirectional driving vehicles, and particularly relates to a parking brake quick response device of a bidirectional driving explosion-proof vehicle.
Background
With the wide application of modern coal mines to underground trackless auxiliary transport vehicles, stricter requirements are provided for the braking performance and the control system of the vehicles, and the braking of the vehicles needs to have three sets of independently controlled braking, namely service braking, parking braking and emergency braking. The requirement for a bi-directional vehicle is that both cabs must satisfy the three independent brake control systems simultaneously and that the brake must be applied regardless of which cab the brake is operated. The cab of a typical bi-directional vehicle is located at the front and rear of the vehicle, far apart. The service brake adopts a brake released by a hydraulic brake spring, and a double-pipeline brake system is adopted for control, so that the performance is good; generally, the emergency brake and the parking brake share one brake, and the brake is a safety brake, namely, a spring brake hydraulic pressure release. The parking brake control valve adopts a mechanically positioned hydraulic control valve, and the parking brakes of the front cab and the rear cab need to be simultaneously acted, so that the front parking brake valve and the rear parking brake valve are connected in series, and the front cab and the rear cab are far away from each other, and the brake pipeline is long, so that the oil return backpressure of a brake oil return pipeline is formed, the oil return speed is influenced, and the hidden danger of vehicle sliding on a slope is caused. Aiming at the situation, the invention provides a brake quick response device, which reduces the back pressure of an oil return pipeline, increases the oil return speed and solves the problem of the neck of a vehicle sliding after the vehicle pulls a hand brake on a ramp.
Disclosure of Invention
The invention aims to solve the problem of vehicle sliding caused by untimely oil return of a parking brake due to overlong pipelines of an explosion-proof bidirectional driving vehicle.
The invention provides the following technical scheme: a bidirectional driving explosion-proof vehicle parking brake quick response device comprises a parking brake and a hydraulic system for controlling the parking brake, wherein a control valve of the hydraulic system comprises a front cab hand brake valve and a rear cab hand brake valve, and the front cab hand brake valve and the rear cab hand brake valve are connected through a quick response valve; the quick response valve is provided with a valve seat reset through a spring and four oil ports which are mutually communicated, the spring pushes the valve seat out of the quick response valve to cut off the valve seat into two oil paths in a normal state, the two oil paths are respectively communicated with a first oil port and a second oil port, and a third oil port and a fourth oil port, when the oil pressure at the first oil port is greater than the pre-tightening force set by the spring, the valve seat is pushed away by pressure oil, and the four oil ports of the quick response valve are mutually communicated; the first oil port is connected with a parking brake through a plurality of hydraulic elements, the second oil port and the fourth oil port are respectively connected with the port A and the port P of the rear cab hand brake valve, and the third oil port is connected with the port A of the front cab hand brake valve.
Furthermore, the quick response valve comprises a valve body, a cover plate and a valve seat, wherein a valve chamber and three oil holes are arranged in the valve body, the first oil hole penetrates through the valve body, two holes of the first oil hole are respectively a third oil hole and a fourth oil hole, the second oil hole is vertically communicated with the first oil hole, a hole of the second oil hole is the first oil hole, the third oil hole is vertically communicated with the second oil hole, and a hole of the third oil hole is the second oil hole; the cover plate is fastened on the valve body through screws to seal an outer opening of the valve chamber, an inner opening of the valve chamber is communicated with the first oil hole, the valve seat is arranged in the valve chamber in a guiding and sealing fit mode, the spring is pressed between the valve seat and the cover plate, the valve seat blocks a through opening of the second oil hole and the first oil hole, and the third oil hole and the fourth oil hole penetrate through the oil holes in the valve seat to be communicated.
Furthermore, a plurality of annular grooves are formed in the valve seat, sealing rings are embedded in the annular grooves, and the sealing rings seal an annular gap between the valve seat and the valve body.
Further, the end of the valve seat is provided with a circular ring inclined surface, and the circular ring inclined surface is in sealing joint with the intersection of the second oil hole and the first oil hole.
Furthermore, the hydraulic system comprises an energy accumulator and a one-way pressure reducing valve, the energy accumulator is connected with a port P of the front cab hand brake valve to provide pressure oil for the hydraulic system, a first oil port of the quick response valve is connected with the one-way pressure reducing valve, and the front cab hand brake valve and the rear cab hand brake valve are both connected with an oil tank.
Furthermore, the hydraulic system comprises a first hydraulic branch and a second hydraulic branch, the second hydraulic branch comprises a hand pump, the first hydraulic branch comprises a front cab hand brake valve, a rear cab hand brake valve, a quick response valve and a one-way pressure reducing valve, the one-way pressure reducing valve and the hand pump are respectively connected with a port P and a port T of the switching valve, and the port A of the switching valve is connected with the parking brake.
Further, a pressure gauge is arranged between the switching valve and the parking brake.
Compared with the prior art, the invention has the advantages that:
the parking brake quick response device for the bidirectional driving explosion-proof vehicle can be applied to all mining bidirectional driving explosion-proof vehicles, solves the problem that the bidirectional driving vehicle slides on a slope due to the fact that parking brake is delayed due to the particularity of the bidirectional driving vehicle, and is safer and more reliable in use.
Drawings
Fig. 1 is a brake release diagram.
Fig. 2 is a schematic drawing of the pull-up brake of the hand brake valve of the rear cab.
Fig. 3 is a schematic drawing of the pull-up brake of the hand brake valve of the front cab.
Fig. 4 is a schematic structural view of a quick response valve.
In the figure: 1-an accumulator; 2-front cab hand brake valve; 3-rear cab hand brake valve; 4-a fast response valve; d1, a first oil port; d2, a second oil port; d3, a third oil port; d4-a fourth oil port; 5-one-way pressure relief valve; 6-a switching valve; 7-a pressure gauge; 8-hand pump; 9-a first parking brake; 10-a second parking brake; 11-a cover plate; 12-a screw; 13-a valve body; 14-a spring; 15-sealing ring; 16-valve seat.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
As shown in fig. 1-3; a bidirectional driving explosion-proof vehicle parking brake quick response device comprises a parking brake and a hydraulic system for controlling the parking brake, wherein the hydraulic system comprises a first hydraulic branch and a second hydraulic branch, the second hydraulic branch comprises a hand pump 8, the first hydraulic branch comprises a front cab hand brake valve 2, a rear cab hand brake valve 3, a quick response valve 4 and a one-way pressure reducing valve 5, the one-way pressure reducing valve 5 and the hand pump 8 are respectively connected with a P port and a T port of a switching valve 6, and an A port of the switching valve 6 is connected with the parking brake; a pressure gauge 7 is arranged between the switching valve 6 and the parking brake; the parking brakes include a first parking brake 9 and a second parking brake 10 connected in parallel.
The control valve of the first hydraulic branch comprises a front cab hand brake valve 2 and a rear cab hand brake valve 3, and the front cab hand brake valve 2 and the rear cab hand brake valve 3 are connected through a quick response valve 4; the quick response valve 4 is provided with a valve seat 15 reset by a spring 14 and four oil ports communicated with each other, in a normal state, the spring 14 pushes the valve seat 15 out, the quick response valve 4 is internally cut into two oil paths, namely a first oil port D1 communicated with a second oil port D2 and a third oil port D3 communicated with a fourth oil port D4, when the oil pressure at the first oil port D1 is greater than the pre-tightening force set by the spring 14, the valve seat 15 is pushed away by pressure oil, the four oil ports of the quick response valve 4 are communicated with each other, and the set value of the spring 14 is small, namely the pressure oil in the parking brake is quickly discharged, so that the vehicle is prevented from sliding after being stopped on a ramp and a hand brake is pulled. The first oil port D1 is connected with a parking brake through a plurality of hydraulic elements, the second oil port D2 and the fourth oil port D4 are respectively connected with the port A and the port P of the rear cab hand brake valve 3, and the third oil port D3 is connected with the port A of the front cab hand brake valve 2.
The first hydraulic branch comprises an energy accumulator 1, the energy accumulator 1 is connected with a P port of a front cab hand brake valve 2 to provide pressure oil for a hydraulic system, a first oil port D1 of a quick response valve 4 is connected with a one-way pressure reducing valve 5, and the front cab hand brake valve 2 and a rear cab hand brake valve 3 are both connected with an oil tank.
As shown in fig. 4; the quick response valve 4 comprises a valve body 13, a cover plate 11 and a valve seat 16, wherein a valve chamber and three oil holes are arranged in the valve body 13, the first oil hole penetrates through the valve body 13, two holes of the first oil hole are a third oil hole D3 and a fourth oil hole D4 respectively, the second oil hole is vertically communicated with the first oil hole, a hole of the second oil hole is a first oil hole D1, the third oil hole is vertically communicated with the second oil hole, and a hole of the third oil hole is a second oil hole D2; the cover plate 11 is fastened on the valve body 13 through screws 12 to seal an outer port of the valve chamber, an inner port of the valve chamber is communicated with the first oil hole, the valve seat 16 is arranged in the valve chamber in a guiding and sealing matching mode, a plurality of annular grooves are formed in the valve seat 16, sealing rings 15 are embedded in the annular grooves, and the sealing rings 15 seal an annular space between the valve seat 16 and the valve body 13. A spring seat is processed at the upper end of the valve seat 16, a spring guide seat is processed on the cover plate 11, a spring 14 is pressed between the valve seat 16 and the cover plate 11, the valve seat 16 blocks a through opening of the second oil hole and the first oil hole, and the third oil hole D3 and the fourth oil hole D4 penetrate through the oil holes in the valve seat 16 to be communicated. The end of the valve seat 16 has an annular inclined surface that sealingly engages the intersection of the second and first oil bores.
Before a vehicle normally runs, a parking brake needs to be unlocked, a front cab hand brake valve 2 and a rear cab hand brake valve 3 must be simultaneously operated to a release position, as shown in fig. 1, pressure oil from an energy accumulator 1 passes through a port P and a port a of the front cab hand brake valve 2, a third oil port and a fourth oil port of a quick response valve 4, the port P and the port a of the rear cab hand brake valve 3, a second oil port and a first oil port of the quick response valve 4, passes through a pressure reducing valve of a one-way pressure reducing valve 5, reaches the port P of a switching valve 6, passes through the port a, and then enters piston cavities of a first parking brake 9 and a second parking brake 10, and a piston rod compression spring enables friction plates of the brakes to be separated so as to release braking.
After the vehicle is flamed out, as long as the front cab hand brake valve 2 or the rear cab hand brake valve 3 is pulled up at will, as shown in fig. 2, if the driver pulls up the rear cab hand brake valve 3 in the rear cab at this time, the pressure oil in the parking brake is unloaded through the port a and the port P of the switching valve 6, the check valve of the one-way pressure reducing valve 5, the first oil port and the second oil port of the quick response valve 4, and the port a and the port T oil return tank of the rear cab hand brake valve 3 under the action of the return spring. The parking brake presses the friction plate under the action of the spring to realize braking.
If the driver pulls up the front cab hand brake valve 2 when the driver is in the front cab, as shown in fig. 3, when the front cab hand brake valve 2 is pulled up, the pressure oil in the parking brake enters the quick response valve 4 through the port a and the port P of the switching valve 6 and the one-way valve of the one-way pressure reducing valve 5 under the action of the return spring, and is divided into two paths at this time, and one path of pressure oil can be unloaded from the first oil port and the second oil port of the quick response valve 4, the port a and the port P of the rear cab hand brake valve 3 and then to the port a and the port T of the front cab hand brake valve 2. The parking brake presses the friction plate under the action of the spring to realize braking. However, because the pipeline of the joint from the hand brake valve of the rear cab to the hand brake valve of the front cab is too long and the oil return resistance is very large, the other pipeline is unloaded directly from the ports 1 and 3 of the quick response valve 4 to the oil return tank of the port A and the port T of the hand brake valve 2 of the front cab after passing through the one-way pressure reducing valve one-way valve. The parking brake presses the friction plate under the action of the spring to realize braking.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The utility model provides a two-way explosion-proof vehicle parking braking quick response device of driving which characterized in that: the hydraulic system comprises a parking brake and a hydraulic system for controlling the parking brake, wherein a control valve of the hydraulic system comprises a front cab hand brake valve (2) and a rear cab hand brake valve (3), and the front cab hand brake valve (2) is connected with the rear cab hand brake valve (3) through a quick response valve (4); the quick response valve (4) is provided with a valve seat (16) reset through a spring (14) and four oil ports communicated with each other; in a normal state, the spring (14) pushes out the valve seat (16), the interior of the quick response valve (4) is cut into two oil ways, namely a first oil port (D1) is communicated with a second oil port (D2), a third oil port (D3) is communicated with a fourth oil port (D4), when the oil pressure at the first oil port (D1) is greater than the pre-tightening force set by the spring (14), the valve seat (16) is pushed away by pressure oil, and the four oil ports of the quick response valve (4) are communicated; the first oil port (D1) is connected with a parking brake through a plurality of hydraulic elements, the second oil port (D2) and the fourth oil port (D4) are respectively connected with the port A and the port P of the rear cab hand brake valve (3), and the third oil port (D3) is connected with the port A of the front cab hand brake valve (2).
2. The parking brake quick response device for the bi-directional driving explosion-proof vehicle as claimed in claim 1, wherein: the quick response valve (4) comprises a valve body (13), a cover plate (11) and a valve seat (16), wherein a valve chamber and three oil holes are arranged in the valve body (13), the first oil hole penetrates through the valve body (13), two orifices of the first oil hole are respectively a third oil hole (D3) and a fourth oil hole (D4), the second oil hole is vertically communicated with the first oil hole, an orifice of the second oil hole is a first oil hole (D1), the third oil hole is vertically communicated with the second oil hole, and an orifice of the third oil hole is a second oil hole (D2); the cover plate (11) is fastened on the valve body (13) through a screw (12) to seal an outer opening of the valve chamber, an inner opening of the valve chamber is communicated with the first oil hole, the valve seat (16) is arranged in the valve chamber in a guiding and sealing fit mode, a spring (14) is pressed between the valve seat (16) and the cover plate (11), the valve seat (16) blocks a through opening of the second oil hole and the first oil hole, and the third oil hole (D3) and the fourth oil hole (D4) penetrate through the oil holes in the valve seat (16) to be communicated.
3. The parking brake quick response device for the bi-directional driving explosion-proof vehicle as claimed in claim 2, characterized in that: the valve seat (16) is provided with a plurality of annular grooves, sealing rings (15) are embedded in the annular grooves, and the sealing rings (15) seal annular gaps between the valve seat (16) and the valve body (13).
4. The parking brake quick response device for the bi-directional driving explosion-proof vehicle as claimed in claim 3, wherein: the end of the valve seat (16) is provided with a circular ring inclined plane which is in sealing joint with the intersection of the second oil hole and the first oil hole.
5. The parking brake quick response device for the bi-directional driving explosion-proof vehicle as claimed in any one of claims 1 to 4, wherein: the hydraulic system include energy storage ware (1), one-way relief pressure valve (5), energy storage ware (1) is connected with the P mouth of preceding driver's cabin manual brake valve (2) and is provided pressure oil for hydraulic system, first hydraulic fluid port (D1) and the one-way relief pressure valve (5) of quick response valve (4) are connected, preceding driver's cabin manual brake valve (2) all connect the oil tank with back driver's cabin manual brake valve (3).
6. The parking brake quick response device for the bi-directional driving explosion-proof vehicle as claimed in claim 5, wherein: the hydraulic system comprises a first hydraulic branch and a second hydraulic branch, the second hydraulic branch comprises a hand pump (8), the first hydraulic branch comprises a front cab hand brake valve (2), a rear cab hand brake valve (3), a quick response valve (4) and a one-way pressure reducing valve (5), the P port and the T port of a switching valve (6) are respectively connected with the one-way pressure reducing valve (5) and the hand pump (8), and the A port of the switching valve (6) is connected with a parking brake.
7. The parking brake quick response device for the bi-directional driving explosion-proof vehicle as claimed in claim 6, wherein: and a pressure gauge (7) is arranged between the switching valve (6) and the parking brake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210458614.9A CN114932891B (en) | 2022-04-28 | 2022-04-28 | Bidirectional driving explosion-proof vehicle parking brake quick response device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210458614.9A CN114932891B (en) | 2022-04-28 | 2022-04-28 | Bidirectional driving explosion-proof vehicle parking brake quick response device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114932891A CN114932891A (en) | 2022-08-23 |
| CN114932891B true CN114932891B (en) | 2023-02-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210458614.9A Active CN114932891B (en) | 2022-04-28 | 2022-04-28 | Bidirectional driving explosion-proof vehicle parking brake quick response device |
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| Country | Link |
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| CN (1) | CN114932891B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH082402A (en) * | 1994-06-27 | 1996-01-09 | Toyo Umpanki Co Ltd | Parking brake releasing device of vehicle |
| CN101177139B (en) * | 2007-12-10 | 2011-05-18 | 常州科研试制中心有限公司 | Bidirectional steering vehicle braking transmission system |
| CN201646709U (en) * | 2009-06-08 | 2010-11-24 | 昆山晋桦豹胶轮车制造有限公司 | Parking brake protector of explosion-proof diesel engine trackless rubber tyre vehicle |
| CN202200968U (en) * | 2011-08-18 | 2012-04-25 | 三江瓦力特特种车辆有限公司 | Braking system of bidirectional running vehicle |
| CN104494587B (en) * | 2014-11-27 | 2017-02-22 | 中国煤炭科工集团太原研究院有限公司 | Brake protection system of two-way driving anti-explosion rubber-tired vehicle |
-
2022
- 2022-04-28 CN CN202210458614.9A patent/CN114932891B/en active Active
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