CN217099940U - Parking braking control system - Google Patents
Parking braking control system Download PDFInfo
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- CN217099940U CN217099940U CN202220385010.1U CN202220385010U CN217099940U CN 217099940 U CN217099940 U CN 217099940U CN 202220385010 U CN202220385010 U CN 202220385010U CN 217099940 U CN217099940 U CN 217099940U
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- oil
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Abstract
The utility model discloses a parking brake control system, which comprises a brake oil supply part, wherein the brake oil supply part is connected with a parking brake through a parking brake control valve block, and an oil inlet of the parking brake is connected with a manual pump; the choke valve pass through oil pipe with parking brake's oil inlet intercommunication, the oil-out of hand pump is equipped with the overflow valve, the oil-out of hand pump pass through oil pipe with parking brake's oil inlet end, the delivery end intercommunication of choke valve, the utility model provides a simple, reliable, safe parking brake control system realizes parking brake control's automatically controlled mode/manual mode switching with low costs, under the manual mode of relieving, produces high-pressure oil through hand pump and realizes that parking brake removes, has integrateed the overflow valve on the hand pump, avoids hand pump during operation uncontrollable pressure of relieving, and when parking brake removes the system and breaks down among the prior art, the unable problem that parking brake removed that realizes is solved in this application.
Description
Technical Field
The utility model relates to an industrial vehicle technical field specifically is a parking braking control system.
Background
More and more drive axles of industrial vehicles, particularly large-tonnage industrial vehicles are provided with a negative parking brake, the negative parking brake compresses a friction plate through a spring to realize parking braking when the vehicles are not started, and hydraulic high-pressure oil overcomes spring force to jack a brake cylinder to realize parking braking release when the vehicles are started. A mechanical emergency release mechanism is generally integrated on a drive axle for small tonnage, and if a hydraulic control oil way fails, the parking brake can be manually and mechanically released, and a failed vehicle is dragged to a specified place for maintenance. However, the parking brake of the large-tonnage industrial vehicle drive axle has large spring force, large mechanical releasing structure operating force and difficult manual operation, so that a mechanical emergency releasing structure is not arranged generally.
Most of the existing parking brake control systems do not have the function of emergency relief after a hydraulic control oil way fails.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a parking braking control system to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a parking brake control system comprises a brake oil supply part, wherein the brake oil supply part is connected with a parking brake through a parking brake control valve block, and an oil inlet of the parking brake is connected with a manual pump;
the parking brake control valve block is internally provided with a throttle valve, the throttle valve is communicated with an oil inlet of the parking brake through an oil pipe, an oil outlet of the hand pump is communicated with an oil inlet end of the parking brake and an oil outlet end of the throttle valve through an oil pipe, and an oil outlet of the hand pump is provided with a second one-way valve.
As a further aspect of the present invention: the parking brake control valve block comprises a reversing valve communicated with the brake oil supply part, and the reversing valve is a two-position three-way electromagnetic valve.
As a further aspect of the present invention: the oil outlet end of the reversing valve is connected with a pressure reducing valve, the oil outlet end of the pressure reducing valve is communicated with the throttling valve, the pressure reducing valve is connected with a first one-way valve in parallel, and the conduction direction of the one-way valve is directed to the reversing valve through the throttling valve.
As a further aspect of the present invention: the throttle valve includes two states of fully open and fully closed.
As a further aspect of the present invention: the front end of the reversing valve is provided with an oil supply pressure detection switch communicated with the brake oil supply part.
As a further aspect of the present invention: and a parking brake state detection switch communicated with the parking brake is arranged at the rear end of the throttle valve.
As a further aspect of the present invention: an oil outlet of the manual pump (3) is provided with an overflow valve (31).
As a further aspect of the present invention: and an oil inlet pipeline of the parking brake (4) is connected with a pressure gauge (5).
Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides a simple, reliable, safe parking brake control system, realize parking brake control's automatically controlled mode/manual mode switching with low costs, under the manual mode of relieving, produce high pressure oil through the hand pump and realize parking brake and remove, the overflow valve has integrateed on the hand pump, avoid the unable control of hand pump during operation to remove pressure, and simultaneously, this application sets up in the manometer of parking brake intercommunication, a pressure for instructing parking brake, can in time mend the pressure, guarantee the stability of parking brake pressure, when parking brake removes the system and breaks down among the prior art, can't realize the problem that parking brake removed.
Drawings
Fig. 1 is a schematic view of a parking brake control system according to embodiment 1 of the present invention;
FIG. 2 is a schematic view of the parking brake control system of the embodiment 1 in an electric control mode;
FIG. 3 is a schematic view of the parking brake control system of embodiment 1 in a manual mode;
fig. 4 is a schematic system diagram of embodiment 2 of the present invention.
In the figure: 1-a brake oil supply part, 2-a parking brake control valve block, 21-a reversing valve, 22-a pressure reducing valve, 23-a first check valve, 24-a throttle valve, 25-an oil supply pressure detection switch, 26-a parking brake state detection switch, 3-a manual pump, 31-an overflow valve, 32-a second check valve, 4-a parking brake and 5-a pressure gauge.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
Please refer to fig. 1-3, in an embodiment of the present invention, a parking brake control system, including braking oil supply unit 1, braking oil supply unit 1 adopts conventional oil supply system technical scheme, mainly include hydraulic pump, the accumulator, fill elements such as liquid control valve, the oil end connection of braking oil supply unit 1 is by parking brake control valve block 2, parking brake control valve block 2 includes the switching-over valve 21 with braking oil supply unit 1 intercommunication, switching-over valve 21 is two-position three-way solenoid valve, the oil end of switching-over valve 21 is connected with relief pressure valve 22, the oil end of relief pressure valve 22 communicates with choke valve 24, the oil-out of choke valve 24 passes through the pipe connection by parking brake 4, choke valve 24 is including two states of complete opening and complete closing, relief pressure valve 22 is parallelly connected with first check valve 23, the turn-on direction of check valve 23 is by directional choke valve 21 of choke valve 24.
During normal operation, the throttle valve 24 is in a fully open state, as shown in fig. 2, when the reversing valve 21 is energized, high-pressure oil flows to the parking brake 4, and the parking brake is released; when the reversing valve 21 is powered off, the high-pressure oil of the parking brake 4 is quickly unloaded through the throttle valve 24 and the first one-way valve 23, so that the parking brake is realized; the pressure reducing valve 22 is a pressure-adjustable pressure reducing valve, and sets a pressure value for reducing pressure according to a parking release pressure of the parking brake, so as to prevent a sealing member of the brake from being damaged due to overhigh pressure.
The front end of the reversing valve 21 is provided with an oil supply pressure detection switch 25 communicated with the brake oil supply part 1, the rear end of the throttle valve 24 is provided with a parking brake state detection switch 26 communicated with the parking brake 4, and the oil supply pressure detection switch 25 can send a signal to a vehicle electric control system to perform related liquid filling control and alarm prompt when detecting that the pressure of an oil supply system is low and the pressure of the parking brake release cannot be continuously met; the parking brake state detection switch 26 can send a signal to the vehicle electronic control system when the parking brake is released, and at the moment, the vehicle is allowed to run, so that the vehicle running in the state that the parking brake is not released due to the fault of the reversing valve 21 or the reducing valve 22 is prevented from being damaged.
An oil inlet of the parking brake 4 is connected with the manual pump 3, an oil outlet of the manual pump 3 is provided with an overflow valve 31, if pressure generated during the working of the manual pump 3 is too high, the pressure required for releasing the parking brake is exceeded, the overflow valve 31 can be opened for unloading, the manual pump 3 is prevented from generating too high pressure to damage the parking brake 4, the oil outlet of the manual pump 3 is communicated with an oil inlet end of the parking brake 4 through an oil pipe, an oil outlet end of the throttle valve 24 is communicated, the oil outlet of the manual pump 3 is provided with a second check valve 32, the situation that when the parking brake control valve block 2 works, high-pressure oil reversely flows to the manual pump 3 to cause leakage, and the pressure of the parking brake is released quickly is caused.
When the whole vehicle of the vehicle fails to work normally and the parking brake needs to be manually released, the throttle valve 24 in the parking brake control valve block 2 is completely closed, as shown in the attached drawing 3, the manual pump 3 is operated, high-pressure oil is pumped into the parking brake 4 through the manual pump 3, the high-pressure oil enters the parking brake 4 to push the parking brake 4 to act and release the parking brake, the pressure of the hydraulic oil generated by the manual pump 3 does not need to be concerned in the process, when the operating force is obviously increased to indicate that high pressure is generated, the operation is continued for a plurality of times, the overflow valve 31 is opened to work, and the pressure is ensured to meet the requirement for releasing the parking brake.
When the vehicle needs to be repaired and the parking brake function of the vehicle needs to be recovered, at this time, the throttle valve 24 in the parking brake control valve block 2 needs to be fully opened, as shown in fig. 2, the high-pressure oil in the parking brake 4 flows back to the brake oil tank through the throttle valve 24, the first check valve 23 and the reversing valve 21, and then the parking brake is recovered.
Example 2
Referring to fig. 4, in this embodiment, a pressure gauge 5 is installed on an oil inlet pipe of a parking brake 4, and an overflow valve is not provided on a manual pump 3, and the rest of the structure is the same as that of embodiment 1.
In this embodiment, the pressure gauge 5 is connected to an oil outlet of the manual pump 3, when the vehicle fails to work normally and the parking brake needs to be manually released, the throttle 24 in the parking brake control valve block 2 is completely closed, then the manual pump 3 is operated, high-pressure oil is pumped into the parking brake 4 through the manual pump 3, the high-pressure oil enters the parking brake 4 and then pushes the parking brake 4 to act and release the parking brake, the pressure at the outlet of the manual pump 3 is observed through the pressure gauge 5 in the process, and when the pressure reaches the release pressure of the parking brake, the pressing operation of the manual pump is stopped.
In this embodiment, in addition to the effects of embodiment 1, the following effects can be obtained:
when the pressure is lower than the releasing pressure of the parking brake, the manual pump operation can be carried out again to carry out pressure supplementing operation.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A parking brake control system comprises a brake oil supply part (1), wherein the brake oil supply part (1) is connected with a parking brake (4) through a parking brake control valve block (2), and is characterized in that an oil inlet of the parking brake (4) is connected with a manual pump (3);
be equipped with choke valve (24) in parking brake control valve piece (2), choke valve (24) pass through oil pipe with the oil inlet intercommunication of parking brake (4), the oil-out of hand pump (3) pass through oil pipe with the oil feed end of parking brake (4), the oil outlet end intercommunication of choke valve (24), the oil-out of hand pump (3) is equipped with second check valve (32).
2. A parking brake control system according to claim 1, characterized in that the parking brake control valve block (2) comprises a direction valve (21) communicating with the brake oil supply (1), the direction valve (21) being a two-position three-way solenoid valve.
3. A parking brake control system according to claim 2, characterized in that a pressure reducing valve (22) is connected to the oil outlet end of the reversing valve (21), the oil outlet end of the pressure reducing valve (22) is communicated with the throttle valve (24), the pressure reducing valve (22) is connected with a first check valve (23) in parallel, and the communication direction of the check valve (23) is directed to the reversing valve (21) from the throttle valve (24).
4. A parking brake control system according to claim 1, characterized in that the throttle valve (24) comprises two states, fully open and fully closed.
5. A parking brake control system according to claim 2, wherein the switching valve (21) is provided at a front end thereof with an oil supply pressure detection switch (25) communicating with the brake oil supply portion (1).
6. A parking brake control system according to claim 1, wherein a parking brake state detection switch (26) communicating with the parking brake (4) is provided at a rear end of the throttle valve (24).
7. Parking brake control system according to claim 1, characterized in that the oil outlet of the manual pump (3) is provided with a relief valve (31).
8. Parking brake control system according to claim 1 or 7, characterized in that a pressure gauge (5) is connected to the oil inlet line of the parking brake (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220385010.1U CN217099940U (en) | 2022-02-23 | 2022-02-23 | Parking braking control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220385010.1U CN217099940U (en) | 2022-02-23 | 2022-02-23 | Parking braking control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217099940U true CN217099940U (en) | 2022-08-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220385010.1U Active CN217099940U (en) | 2022-02-23 | 2022-02-23 | Parking braking control system |
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| CN (1) | CN217099940U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116373822A (en) * | 2023-06-06 | 2023-07-04 | 克诺尔车辆设备(苏州)有限公司 | Brake control system and rolling stock system with same |
-
2022
- 2022-02-23 CN CN202220385010.1U patent/CN217099940U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116373822A (en) * | 2023-06-06 | 2023-07-04 | 克诺尔车辆设备(苏州)有限公司 | Brake control system and rolling stock system with same |
| CN116373822B (en) * | 2023-06-06 | 2023-09-05 | 克诺尔车辆设备(苏州)有限公司 | Brake control system and rolling stock system with same |
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