CN217056088U - Parking brake hydraulic control system and forklift truck - Google Patents
Parking brake hydraulic control system and forklift truck Download PDFInfo
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- CN217056088U CN217056088U CN202220780421.0U CN202220780421U CN217056088U CN 217056088 U CN217056088 U CN 217056088U CN 202220780421 U CN202220780421 U CN 202220780421U CN 217056088 U CN217056088 U CN 217056088U
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- 239000003921 oil Substances 0.000 claims abstract description 69
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 51
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 5
- 230000001934 delay Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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Abstract
The utility model discloses a parking braking hydraulic control system and forklift truck, parking braking hydraulic control system are applied to the vehicle, include: a parking brake including a port P1; the parking brake hydraulic oil path is connected with the oil port P1 and is used for supplying hydraulic oil to the parking brake or relieving the pressure of the parking brake; the first electromagnetic reversing valve is arranged on the parking brake hydraulic oil way and used for switching the oil flow direction of the parking brake hydraulic oil way; and the flow control valve is arranged on the parking braking hydraulic oil path, is positioned between the first electromagnetic reversing valve and the parking brake and is used for adjusting the pressure relief flow of the parking brake when the vehicle is suddenly stopped. During sudden stop, the opening of the flow control valve can be controlled and adjusted before the first electromagnetic reversing valve is switched, so that the flow control valve has proper flow, and then the first electromagnetic reversing valve is switched, so that the parking brake is slowly decompressed and reset, the parking brake is prevented from being directly locked after sudden stop, stable parking is realized, and the impact of the whole vehicle is avoided.
Description
Technical Field
The utility model relates to a parking braking control technical field, more specifically say, relate to a parking braking hydraulic control system. Furthermore, the utility model discloses still relate to a fork truck including above-mentioned parking brake hydraulic control system.
Background
When vehicles such as a high-position forklift truck run and meet emergency situations, a driver can press the vehicle to suddenly stop so as to flameout and stop the engine of the vehicle, at the moment, all the hydraulic pumps stop supplying oil, so that the vehicle parking device can be quickly reset and locked when the vehicle runs at high speed, the vehicle is subjected to great impact and even rollover, and great potential safety hazards exist.
In the prior art, in order to avoid large impact or rollover of a vehicle during emergency braking, a one-way valve is added in front of an oil inlet pipeline of an electromagnetic reversing valve of a brake hydraulic circuit of a parking device, so that after oil supply of a hydraulic pump is stopped, pressure maintaining can be realized for a period of time by using the one-way valve, and after the vehicle is decelerated, the parking brake is released by switching the electromagnetic reversing valve and then is reset for braking.
However, by adding the check valve in front of the oil inlet pipeline of the electromagnetic directional valve, although a certain parking pressure maintaining can be effectively performed by delaying the switching of the electromagnetic directional valve, the situation that the parking device is directly locked after pressing the scram is avoided, but the vehicle impact is still difficult to avoid at the instant of pressure relief after the switching of the electromagnetic directional valve.
In summary, how to avoid the impact generated during the emergency braking of the vehicle and at the instant of pressure relief is an urgent problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention is directed to a parking brake hydraulic control system, which can prevent the vehicle from generating impact during emergency braking and during instant pressure relief.
Another object of the utility model is to provide an including above-mentioned parking brake hydraulic control system's fork truck, can ensure the steady parking when scramming, avoid the vehicle to produce the impact.
In order to achieve the above object, the present invention provides the following technical solutions:
a parking brake hydraulic control system applied to a vehicle includes:
a parking brake including a port P1;
the parking braking hydraulic oil path is connected with the oil port P1 and is used for supplying hydraulic oil to the parking brake or relieving the pressure of the parking brake;
the first electromagnetic reversing valve is arranged in the parking brake hydraulic oil way and used for switching the oil flow direction of the parking brake hydraulic oil way;
and the flow control valve is arranged on the parking braking hydraulic oil way, is positioned between the first electromagnetic directional valve and the parking brake and is used for adjusting the pressure relief flow of the parking brake when the vehicle is suddenly stopped.
Optionally, the flow control device further comprises a second electromagnetic directional valve, which is arranged in parallel with the flow control valve, the second electromagnetic directional valve is in a normally open mode, and the flow control valve is in a normally closed mode.
Optionally, a pressure sensor for monitoring the pressure of the oil port P1 in real time is further included.
Optionally, the pressure sensor is connected with a controller, the controller is further connected with the flow control valve and a rotation speed sensor, the rotation speed sensor is used for detecting the traveling speed of the vehicle, and the controller is used for controlling and adjusting the opening of the flow control valve according to the traveling speed of the vehicle and the pressure of the oil port P1 when the vehicle stops suddenly.
Optionally, when the vehicle suddenly stops, after the first electromagnetic directional valve switches the station and the second electromagnetic directional valve is closed, the controller delays for a preset time and then controls and adjusts the opening of the flow control valve.
Optionally, the flow control valve comprises an electro-proportional flow valve or a servo valve.
Optionally, the first electromagnetic directional valve comprises a switching valve, a proportional valve or a servo valve; and/or the second electromagnetic directional valve comprises a switch valve, a proportional valve or a servo valve.
Optionally, the parking brake hydraulic oil passage includes:
a hydraulic pump for providing a hydraulic power source, to which a prime mover is connected;
one end of the oil inlet path is connected with an outlet of the hydraulic pump, and the other end of the oil inlet path is connected with an oil inlet P of the first electromagnetic directional valve;
one end of the oil return path is connected with the hydraulic oil tank, and the other end of the oil return path is connected with an oil return port T of the first electromagnetic reversing valve;
and the connecting oil path is connected between the working oil port A of the first electromagnetic directional valve and the oil port P1, and the flow control valve is arranged on the connecting oil path.
Optionally, an overflow valve is connected between the outlet of the hydraulic pump and the hydraulic oil tank.
A forklift truck comprises any one of the parking brake hydraulic control systems.
The utility model provides a parking braking hydraulic control system, in the vehicle normal walking in-process, slap the scram when the driver, make vehicle engine after flame-out, can be before first electromagnetic directional valve switches the station, the aperture size through control regulation flow control valve, make flow control valve have suitable flow, then switch first electromagnetic directional valve again, make parking braking hydraulic circuit be used for parking brake pressure release, at this moment, can make the slow pressure release of parking brake reset, prevent to slap direct locking of parking brake after the scram, realize steady parking, avoided the vehicle to produce whole car and assault, also, even if in the twinkling of an eye at the pressure release after first electromagnetic directional valve switches, also can avoid the vehicle to produce and assault. Therefore, the parking brake hydraulic control system can avoid the impact generated when the vehicle is emergently braked, and the impact can not be generated at the instant of pressure relief.
The utility model provides a forklift truck, including above-mentioned parking brake hydraulic control system, have above-mentioned beneficial effect, can ensure the steady parking when scramming, avoid the vehicle to produce and strike.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be 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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a control schematic diagram of a parking brake hydraulic control system according to an embodiment of the present invention.
The reference numerals in fig. 1 are as follows:
the system comprises a parking brake 1, a first electromagnetic directional valve 2, a flow control valve 3, a second electromagnetic directional valve 4, a pressure sensor 5, a hydraulic pump 6, a prime mover 7, an oil inlet path 8, an oil return path 9, a hydraulic oil tank 10, a connecting oil path 11, an overflow valve 12 and a preset driving oil path 13.
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 of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The core of the utility model is to provide a parking braking hydraulic control system, it can avoid when vehicle emergency braking with in the pressure release in the twinkling of an eye produce the impact. The utility model discloses an another core provides a forklift truck including above-mentioned parking brake hydraulic control system, can ensure the steady parking when scramming, avoids the vehicle to produce and strikes.
Referring to fig. 1, a control schematic diagram of a parking brake hydraulic control system according to an embodiment of the present invention is shown.
The embodiment of the utility model provides a parking braking hydraulic control system is applied to the vehicle, and this parking braking hydraulic control system includes parking brake 1, parking braking hydraulic circuit, first magenetic exchange valve 2 and flow control valve 3, and parking brake 1 includes hydraulic fluid port P1; the parking brake hydraulic oil path is connected with the oil port P1 and is used for supplying hydraulic oil to the parking brake 1 or relieving the pressure of the parking brake 1; the first electromagnetic directional valve 2 is arranged on the parking brake hydraulic oil way and used for switching the oil flow direction of the parking brake hydraulic oil way; the flow control valve 3 is arranged on a parking brake hydraulic oil path, is positioned between the first electromagnetic directional valve 2 and the parking brake 1, and is used for adjusting the pressure relief flow of the parking brake 1 when the vehicle is in emergency stop.
It can be understood that when the vehicle is normally running, the hydraulic oil in the parking brake hydraulic oil path supplies the hydraulic oil to the oil port P1 of the parking brake 1 through the first electromagnetic directional valve 2 and the flow control valve 3, and the parking brake 1 is in the unlocking state under the action of the hydraulic oil, so as to meet the requirement of the vehicle for normal running. In this condition, the flow control valve 3 may be controlled to be at the maximum flow rate, so that the hydraulic oil supplied from the parking brake hydraulic oil path can rapidly flow into the oil port P1 of the parking brake 1, and the parking brake 1 is rapidly unlocked when the vehicle starts to move.
In the normal running process of a vehicle, when a driver slaps and scrams, after an engine of the vehicle is shut down, before a first electromagnetic directional valve 2 switches stations, the opening of a flow control valve 3 is controlled and adjusted, the flow control valve 3 has proper flow, then the first electromagnetic directional valve 2 is switched, a parking brake hydraulic oil circuit is used for releasing pressure of a parking brake 1, at the moment, the parking brake 1 can be slowly released and reset, the parking brake 1 is prevented from being directly locked after slapping and scrams, stable parking is realized, the impact of the whole vehicle is avoided, and the impact of the vehicle can be avoided even if the pressure release after the first electromagnetic directional valve 2 is switched is instantaneous. Therefore, the parking brake hydraulic control system can avoid the impact generated when the vehicle is braked emergently, and the impact can not be generated at the instant of pressure relief.
In addition, it can be understood that, in the normal running process of the vehicle, when the vehicle is normally stopped, the first electromagnetic directional valve 2 switches the work position, so that the hydraulic oil in the parking brake 1 is decompressed through the parking brake hydraulic oil path, and at this time, the parking brake function is realized under the action of the spring of the parking brake 1. It should be noted that, under such a working condition, the flow control valve 3 may be controlled to be at the maximum flow rate, so that the hydraulic oil in the parking brake 1 is quickly released, and the quick parking brake during normal parking is realized.
In order to quickly unlock the parking brake 1 when the vehicle starts traveling and to realize quick parking brake when the vehicle is normally stopped, it is necessary to ensure a sufficiently large flow capacity when the flow control valve 3 is at the maximum flow rate.
Further, for convenience of control, in some embodiments, a second electromagnetic directional valve 4 is further included, the second electromagnetic directional valve 4 is arranged in parallel with the flow control valve 3, the second electromagnetic directional valve 4 is in a normally open mode, and the flow control valve 3 is in a normally closed mode.
It is understood that normal walking and normal parking of the vehicle are normal, and the number of times the vehicle is suddenly stopped is relatively small. Therefore, in the embodiment, the second electromagnetic directional valve 4 is additionally arranged, the second electromagnetic directional valve 4 is in a normally open mode, and the flow control valve 3 is in a normally closed mode, so that when the vehicle normally travels and normally stops, the oil path between the first electromagnetic directional valve 2 and the oil port P1 is communicated through the second electromagnetic directional valve 4, that is, no matter under the working condition that the vehicle normally travels or the working condition that the vehicle normally stops, the second electromagnetic directional valve 4 is in an open state, the flow control valve 3 is in a closed state, and the flow control valve 3 does not work, so that the flow control valve 3 can be prevented from being adjusted when the vehicle normally travels and normally stops, and is convenient to control; meanwhile, the parking brake 1 can be unlocked and braked quickly, and the normal use requirement of the vehicle is met. And after the driver slaps the scram, the second electromagnetic directional valve 4 is closed, the flow control valve 3 is opened, the oil path between the first electromagnetic directional valve 2 and the oil port P1 is communicated through the flow control valve 3, so that the pressure relief flow of the parking brake 1 is adjusted by adjusting the opening of the flow control valve 3 when the vehicle scram, the oil port P1 of the parking brake 1 is slowly relieved, and the stable parking during slam scram is realized.
Specifically, when the vehicle is normally running, the first electromagnetic directional valve 2 is opened, the second electromagnetic directional valve 4 is in an opened state, hydraulic oil in the parking brake hydraulic oil path passes through the first electromagnetic directional valve 2 and the second electromagnetic directional valve 4 to supply hydraulic oil to the oil port P1 of the parking brake 1, and the parking brake 1 is in a lock release state under the action of the hydraulic oil, so as to meet the requirement of the vehicle for normal running.
When the vehicle normally stops, the first electromagnetic directional valve 2 switches the stations, the second electromagnetic directional valve 4 continuously keeps an opening state, hydraulic oil in the parking brake 1 flows out from the oil port P1 and then is decompressed through the parking brake hydraulic oil circuit, in the decompression process, the hydraulic oil sequentially passes through the second electromagnetic directional valve 4 and the first electromagnetic directional valve 2, and at the moment, the parking brake function is achieved under the action of a spring of the parking brake 1.
When a driver slaps to stop suddenly to enable a vehicle engine to be shut down, the first electromagnetic directional valve 2 switches work positions, the second electromagnetic directional valve 4 is closed, at the moment, the flow control valve 3 is in a closed state, pressure maintaining can be achieved through the oil port P1 of the parking brake 1, and the parking brake 1 is prevented from being directly locked at a high speed of the vehicle. Then, the opening of the flow control valve 3 can be controlled and adjusted to enable the flow control valve 3 to have proper flow, so that the pressure of the oil port P1 of the parking brake 1 can be slowly released, stable parking during slapping and sudden stopping can be realized, and the impact and side turning of the whole vehicle can be avoided.
In addition, in order to be able to monitor the pressure of the port P1 of the parking brake 1 in real time, in some embodiments, the parking brake hydraulic control system further includes a pressure sensor 5 for monitoring the pressure of the port P1 in real time. That is, in the present embodiment, the pressure of the port P1 of the parking brake 1 is monitored in real time by adding the pressure sensor 5, so that the opening size of the flow control valve 3 is adjusted according to the pressure of the port P1 of the parking brake 1.
Further, in some embodiments, the pressure sensor 5 is connected to a controller, the controller is further connected to the flow control valve 3 and a rotation speed sensor, the rotation speed sensor is used for detecting the traveling speed of the vehicle, and the controller is used for controlling and adjusting the opening of the flow control valve 3 according to the traveling speed of the vehicle and the pressure of the oil port P1 when the vehicle is in a sudden stop.
During work, the pressure sensor 5 collects and monitors the pressure of the oil port P1 of the parking brake 1 and sends the pressure of the oil port P1 of the parking brake 1 to the controller; the rotating speed sensor collects and monitors the traveling speed of the vehicle and sends the traveling speed of the vehicle to the controller; after the controller receives the pressure of the oil port P1 and the traveling speed of the vehicle, a control signal is sent to the flow control valve 3 according to the pressure of the oil port P1 and the traveling speed of the vehicle, the opening size of the flow control valve 3 is controlled to be adjusted in real time, the oil port P1 of the parking brake 1 is enabled to be slowly decompressed, and stable parking during slapping and emergency stopping under different vehicle speeds is achieved.
Further, in some embodiments, when the vehicle suddenly stops, after the first electromagnetic directional valve 2 switches the work position and the second electromagnetic directional valve 4 is closed, the controller delays for a preset time to control and adjust the opening size of the flow control valve 3. That is to say, after the first electromagnetic directional valve 2 switches the work station and the second electromagnetic directional valve 4 is closed, at this time, the flow control valve 3 is in a normally closed state, and the parking brake hydraulic control system maintains the pressure for a preset time, so as to prevent the parking brake 1 from being directly locked at a high speed; after the parking brake hydraulic control system maintains the pressure for a preset time, the controller controls the flow control valve 3 to open a certain opening, so that the oil port P1 of the parking brake 1 is slowly decompressed, stable parking is realized, and the impact and side turning of the whole vehicle are avoided.
It should be noted that, in this embodiment, the value of the delayed preset time is not specifically limited, and in some embodiments, the preset time is 1 to 5 seconds, that is, after the first electromagnetic directional valve 2 switches the station and the second electromagnetic directional valve 4 is closed, the controller delays for 1 to 5 seconds and then controls and adjusts the opening of the flow control valve 3.
It should be noted that, in the above embodiments, the type of the flow rate control valve 3 is not particularly limited as long as it can achieve flow rate adjustment.
In some embodiments, the flow control valve 3 comprises an electro-proportional flow valve or a servo valve.
In addition, in each of the above embodiments, the type of the first electromagnetic directional valve 2 and/or the second electromagnetic directional valve 4 is not particularly limited as long as the respective corresponding functions of the first electromagnetic directional valve 2 and the second electromagnetic directional valve 4 can be achieved.
In some embodiments, the first electromagnetic directional valve 2 includes a switching valve, a proportional valve, or a servo valve.
In some embodiments, the second electromagnetic directional valve 4 includes a switching valve, a proportional valve, or a servo valve.
In addition, the first electromagnetic directional valve 2 may be a two-position valve or a three-position valve; it can also be a three-way valve or a four-way valve. The second electromagnetic directional valve 4 may be a two-position valve or a three-position valve.
It should be noted that, in the above embodiments, the specific composition of the parking brake hydraulic oil path is not limited, as long as the parking brake hydraulic oil path can supply hydraulic oil with stable pressure and can return oil.
In some embodiments, the parking brake hydraulic circuit includes a hydraulic pump 6, a prime mover 7, an oil inlet circuit 8, an oil return circuit 9, and a connection circuit 11, the hydraulic pump 6 is used to provide a hydraulic power source, and the hydraulic pump 6 is connected to the prime mover 7; one end of the oil inlet path 8 is connected with an outlet of the hydraulic pump 6, and the other end is connected with an oil inlet P of the first electromagnetic directional valve 2; one end of the oil return path 9 is connected with the hydraulic oil tank 10, and the other end is connected with an oil return port T of the first electromagnetic directional valve 2; the connection oil passage 11 is connected between the hydraulic fluid port a and the hydraulic fluid port P1 of the first electromagnetic directional valve 2, and the flow rate control valve 3 is provided in the connection oil passage 11.
It should be noted that the present embodiment does not limit the type of the hydraulic pump 6, and for example, the hydraulic pump 6 may be a fixed displacement pump or a variable displacement pump.
In some embodiments, a preset driving oil path 13 is further connected to the outlet of the hydraulic pump 6, and the preset driving oil path 13 is used for supplying oil to a preset actuator. That is, the hydraulic pump 6 can supply the hydraulic oil not only to the parking brake hydraulic oil passage but also to other preset actuators.
In some embodiments, an overflow valve 12 is connected between the outlet of the hydraulic pump 6 and the hydraulic oil tank 10. The relief valve 12 can adjust the maximum pressure output from the hydraulic pump 6 to the parking brake hydraulic passage to ensure the safety of the parking brake hydraulic control system.
Except for the parking braking hydraulic control system, the utility model discloses still provide a fork truck including the parking braking hydraulic control system that the above-mentioned embodiment is disclosed, the prior art is referred to the structure of other each parts of this fork truck, and this text is no longer repeated.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
In the present specification, the embodiments are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
It is right above the utility model provides a parking braking hydraulic control system and fork truck have carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the scope of the appended claims.
Claims (10)
1. A parking brake hydraulic control system is applied to a vehicle, and is characterized by comprising:
a parking brake (1) including a port P1;
the parking braking hydraulic oil path is connected with the oil port P1 and is used for supplying hydraulic oil to the parking brake (1) or relieving the pressure of the parking brake (1);
the first electromagnetic directional valve (2) is arranged in the parking brake hydraulic oil way and used for switching the oil flow direction of the parking brake hydraulic oil way;
and the flow control valve (3) is arranged on the parking braking hydraulic oil way, is positioned between the first electromagnetic reversing valve (2) and the parking brake (1), and is used for adjusting the pressure relief flow of the parking brake (1) when the vehicle is suddenly stopped.
2. The parking brake hydraulic control system according to claim 1, further comprising a second electromagnetic directional valve (4) provided in parallel with the flow control valve (3), the second electromagnetic directional valve (4) being in a normally open mode, the flow control valve (3) being in a normally closed mode.
3. The parking brake hydraulic control system according to claim 2, further comprising a pressure sensor (5) for monitoring the pressure of the port P1 in real time.
4. The parking brake hydraulic control system according to claim 3, wherein a controller is connected to the pressure sensor (5), the controller is further connected to the flow control valve (3) and a rotation speed sensor, the rotation speed sensor is configured to detect a traveling speed of the vehicle, and the controller is configured to control and adjust an opening size of the flow control valve (3) according to the traveling speed of the vehicle and the pressure of the oil port P1 when the vehicle is abruptly stopped.
5. The parking brake hydraulic control system according to claim 4, wherein the controller controls the opening of the flow control valve (3) to be adjusted after a delay of a preset time period, when the first electromagnetic directional valve (2) switches the work station and the second electromagnetic directional valve (4) is closed, during a sudden stop of the vehicle.
6. Parking brake hydraulic control system according to claim 1 or 2, characterized in that the flow control valve (3) comprises an electro proportional flow valve or a servo valve.
7. The parking brake hydraulic control system according to claim 2, characterized in that the first electromagnetic directional valve (2) includes a switching valve, a proportional valve, or a servo valve; and/or the second electromagnetic directional valve (4) comprises a switch valve, a proportional valve or a servo valve.
8. The parking brake hydraulic control system according to claim 1 or 2, characterized in that the parking brake hydraulic oil passage includes:
a hydraulic pump (6) for providing a hydraulic power source, which is connected with a prime mover (7);
one end of the oil inlet path (8) is connected with the outlet of the hydraulic pump (6), and the other end of the oil inlet path is connected with an oil inlet P of the first electromagnetic directional valve (2);
one end of the oil return path (9) is connected with the hydraulic oil tank (10), and the other end of the oil return path is connected with an oil return port T of the first electromagnetic directional valve (2);
and the connecting oil path (11) is connected between the working oil port A of the first electromagnetic reversing valve (2) and the oil port P1, and the flow control valve (3) is arranged on the connecting oil path (11).
9. The parking brake hydraulic control system according to claim 8, characterized in that an overflow valve (12) is connected between an outlet of the hydraulic pump (6) and the hydraulic oil tank (10).
10. A forklift truck characterized by comprising the parking brake hydraulic control system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220780421.0U CN217056088U (en) | 2022-04-01 | 2022-04-01 | Parking brake hydraulic control system and forklift truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220780421.0U CN217056088U (en) | 2022-04-01 | 2022-04-01 | Parking brake hydraulic control system and forklift truck |
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| Publication Number | Publication Date |
|---|---|
| CN217056088U true CN217056088U (en) | 2022-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220780421.0U Active CN217056088U (en) | 2022-04-01 | 2022-04-01 | Parking brake hydraulic control system and forklift truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217056088U (en) |
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2022
- 2022-04-01 CN CN202220780421.0U patent/CN217056088U/en active Active
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