CN219505991U - Hydraulic brake system and working machine - Google Patents
Hydraulic brake system and working machine Download PDFInfo
- Publication number
- CN219505991U CN219505991U CN202320520901.8U CN202320520901U CN219505991U CN 219505991 U CN219505991 U CN 219505991U CN 202320520901 U CN202320520901 U CN 202320520901U CN 219505991 U CN219505991 U CN 219505991U
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- 230000036316 preload Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 77
- 238000001514 detection method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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- Braking Systems And Boosters (AREA)
Abstract
The utility model relates to the technical field of hydraulic systems, and provides a hydraulic braking system and a working machine. The hydraulic braking system comprises a hydraulic pump, a charging valve, an accumulator, a braking component and an oil tank. The hydraulic pump is respectively connected with the energy accumulator and the oil tank through the charging valve. The energy accumulator is connected with a control oil port of the liquid filling valve so as to control the communication state of the hydraulic pump, the energy accumulator and the oil tank. The accumulator is connected with the brake assembly. Through the structure, the control oil port of the accumulator and the control oil port of the charging valve are communicated, so that the internal actual pressure value of the accumulator is fed back to the control oil port of the charging valve in real time, and the working state of the charging valve is controlled. Thereby, the hydraulic pump is communicated with the accumulator to charge the accumulator; alternatively, the hydraulic pump is placed in communication with the tank to unload the hydraulic pump and stop charging the accumulator. Compared with the prior art, the hydraulic braking system is simpler in structure and relatively lower in failure rate.
Description
Technical Field
The utility model relates to the technical field of hydraulic systems, in particular to a hydraulic braking system and a working machine.
Background
For work machines such as loaders, hydraulic brake systems are generally used as the brake system. In hydraulic braking systems, in order to reduce the energy consumption of the hydraulic pump, an accumulator is generally used to supply the brake with oil. The accumulator is connected with the hydraulic pump through a charging valve to supplement oil. In the prior art, accumulator charging is typically controlled by a pressure sensor and a controller. Specifically, the pressure sensor is used for detecting the pressure value of the accumulator, and the controller controls the working state of the charging valve based on the detection result of the pressure sensor so as to charge the accumulator when the pressure of the accumulator is insufficient. The liquid filling control mode is complex, and the failure rate is high.
Disclosure of Invention
The utility model provides a hydraulic braking system and a working machine, which are used for solving or improving the problems that an accumulator in the existing hydraulic braking system is complex in charging control mode and high in failure rate.
According to a first aspect of the present utility model, a hydraulic brake system is provided that includes a hydraulic pump, a charge valve, an accumulator, a brake assembly, and a fuel tank.
The hydraulic pump is connected with the accumulator and the oil tank through the charging valve respectively. The energy accumulator is connected with a control oil port of the liquid filling valve so as to control the communication state of the hydraulic pump, the energy accumulator and the oil tank. The accumulator is connected with the brake assembly.
According to the hydraulic braking system provided by the utility model, the charging valve comprises a charging level and a charging stop position.
In the state of the charging level, the hydraulic pump is communicated with the accumulator through the charging valve; in the state of the charge stop position, the hydraulic pump communicates with the tank through the charge valve.
According to the hydraulic braking system provided by the utility model, one end of the filling valve core is provided with the spring, and the other end of the filling valve core is provided with the control oil port. The pre-tightening force of the spring is equal to the charging critical pressure value of the energy accumulator.
Switching the charging valve to the charging position in a state that the actual pressure value of the accumulator is smaller than or equal to the charging critical pressure value of the accumulator; and the charging valve is switched to the charging stop position under the state that the actual pressure value of the accumulator is larger than the charging critical pressure value of the accumulator.
According to the present utility model, there is provided a hydraulic brake system, the brake assembly including a brake control valve and a brake.
The brake is connected with the energy accumulator and the oil tank through the brake control valve. The brake control valve is used for controlling the communication state of the brake, the energy accumulator and the oil tank.
According to the hydraulic brake system provided by the utility model, the brake control valve comprises a brake position and a brake release position.
In the state of the braking position, the brake is communicated with the accumulator through the brake control valve; in the brake release position, the brake is in communication with the oil tank through the brake control valve.
According to the hydraulic braking system provided by the utility model, the brakes comprise a front axle brake and a rear axle brake. The front axle brake and the rear axle brake are connected with the energy accumulator and the oil tank through the brake control valve.
In the state of the braking position, the front axle brake and the rear axle brake are simultaneously communicated with the energy accumulator through the braking control valve; in the brake release position, the front axle brake and the rear axle brake are simultaneously communicated with the oil tank through the brake control valve.
According to the hydraulic braking system provided by the utility model, the charging valve is a two-position three-way pilot operated directional valve. The brake control valve is a two-position three-way pedal reversing valve.
According to the hydraulic braking system provided by the utility model, a one-way valve is arranged between the charging valve and the accumulator. And an oil inlet of the one-way valve is connected with the liquid filling valve. And an oil outlet of the one-way valve is connected with the energy accumulator.
According to the hydraulic braking system provided by the utility model, a filter is arranged between the hydraulic pump and the charging valve.
According to a second aspect of the present utility model there is provided a work machine comprising a hydraulic brake system as described above.
In the hydraulic braking system provided by the utility model, a hydraulic pump is respectively connected with an accumulator and an oil tank through a charging valve. The accumulator is connected with a control oil port of the charging valve so as to control the working state of the charging valve by the pressure of the accumulator, and the hydraulic pump is communicated with the accumulator or the oil tank. Or the accumulator can feed back the internal actual pressure value to the control oil port of the charging valve and adjust the working state of the charging valve. For example, when the actual pressure value in the accumulator is smaller than or equal to a certain set pressure value, the actual pressure value in the accumulator is fed back to the control oil port of the charging valve, and the hydraulic pump is controlled to be communicated with the accumulator through the charging valve, so that the hydraulic pump charges the accumulator. When the actual pressure value in the accumulator is larger than or equal to a certain set pressure value, the actual pressure value in the accumulator is fed back to the control oil port of the charging valve, the hydraulic pump is controlled to be communicated with the oil tank through the charging valve, and the hydraulic pump is unloaded to stop charging the accumulator. The accumulator is connected with the brake assembly to provide brake power oil for the brake assembly.
Through the structure, the control oil port of the accumulator and the control oil port of the charging valve are communicated, so that the internal actual pressure value of the accumulator is fed back to the control oil port of the charging valve in real time, and the working state of the charging valve is controlled. Thereby, the hydraulic pump is communicated with the accumulator to charge the accumulator; alternatively, the hydraulic pump is placed in communication with the tank to unload the hydraulic pump and stop charging the accumulator. Compared with the prior art, the hydraulic braking system does not need to be provided with a pressure sensor for detecting the pressure state of the accumulator and a control device for controlling the working state of the charging valve based on the pressure detection result, and has the advantages of simpler system structure and relatively lower failure rate.
Further, in the work machine provided by the present utility model, since it includes the hydraulic brake system as described above, the advantages as described above are also provided.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a system schematic diagram of a hydraulic brake system provided by the present utility model;
reference numerals:
100. a hydraulic pump; 200. a charging valve; 201. filling level; 202. a liquid filling stop position; 203. an oil port is controlled; 204. a spring; 300. an accumulator; 410. a brake control valve; 411. a braking position; 412. a brake release position; 420. a brake; 421. a front axle brake; 422. a rear axle brake; 500. an oil tank; 600. a one-way valve; 700. and (3) a filter.
Detailed Description
Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.
In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present utility model will be understood in detail by those of ordinary skill in the art.
In embodiments of the utility model, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples, as well as features of various embodiments or examples, described in this specification may be combined and combined to further clarify the objects, aspects and advantages of embodiments of the present utility model, without departing from the spirit and scope of the utility model, and it should be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
A hydraulic brake system and a working machine according to an embodiment of the present utility model are described below with reference to fig. 1. It should be understood that the following description is only illustrative of the embodiments of the utility model and is not intended to limit the utility model in any way.
An embodiment of the first aspect of the present utility model provides a hydraulic brake system including a hydraulic pump 100, a charge valve 200, an accumulator 300, a brake assembly, and a tank 500, as shown in fig. 1.
The hydraulic pump 100 is connected to the accumulator 300 and the tank 500 through the charge valve 200. The accumulator 300 is connected to the control port 203 of the charge valve 200 to control the communication state of the hydraulic pump 100 with the accumulator 300 and the tank 500. The accumulator 300 is connected to the brake assembly.
In the hydraulic brake system provided by the present utility model, the hydraulic pump 100 is connected to the accumulator 300 and the tank 500 through the charge valve 200, respectively. The accumulator 300 is connected to the control port 203 of the charge valve 200 to control the operation state of the charge valve 200 by the pressure of the accumulator 300 such that the hydraulic pump 100 communicates with the accumulator 300 or the tank 500. Alternatively, the accumulator 300 can feed back the actual pressure value inside to the control port 203 of the charging valve 200 and adjust the working state of the charging valve 200. For example, when the actual pressure value inside the accumulator 300 is less than or equal to a certain set pressure value, the actual pressure value inside the accumulator 300 is fed back to the control port 203 of the charge valve 200, and the hydraulic pump 100 is controlled to communicate with the accumulator 300 through the charge valve 200, so that the hydraulic pump 100 charges the accumulator 300. When the actual pressure value in the accumulator 300 is greater than or equal to a certain set pressure value, the actual pressure value in the accumulator 300 is fed back to the control oil port 203 of the charging valve 200, and the hydraulic pump 100 is controlled to be communicated with the oil tank 500 through the charging valve 200, and the hydraulic pump 100 is unloaded to stop charging the accumulator 300. The accumulator 300 is coupled to the brake assembly to provide brake power fluid to the brake assembly.
With this structure, the accumulator 300 is communicated with the control port 203 of the charge valve 200, so that the actual pressure value inside the accumulator 300 is fed back to the control port 203 of the charge valve 200 in real time, and the working state of the charge valve 200 is controlled. Thereby, the hydraulic pump 100 is brought into communication with the accumulator 300 to charge the accumulator 300; alternatively, the hydraulic pump 100 is placed in communication with the oil tank 500 to unload the hydraulic pump 100 and stop charging the accumulator 300. Compared with the prior art, the hydraulic braking system does not need to be provided with a pressure sensor for detecting the pressure state of the accumulator 300 and a control device for controlling the working state of the charge valve 200 based on the pressure detection result, and has the advantages of simpler system structure and relatively lower failure rate.
In one embodiment of the present utility model, charge valve 200 includes a charge level 201 and a charge stop level 202. In a state of the charge level 201, the hydraulic pump 100 communicates with the accumulator 300 through the charge valve 200. In the state of the charge stop 202, the hydraulic pump 100 communicates with the tank 500 through the charge valve 200.
Further, in one embodiment of the present utility model, a spring 204 is provided at one end of the spool of the charge valve 200. The other end of the valve core of the filling valve 200 is provided with a control oil port 203. The preload force of the spring 204 is equal to the charge threshold pressure value of the accumulator 300.
In a state where the actual pressure value of the accumulator 300 is equal to or less than the charge critical pressure value of the accumulator 300, the charge valve 200 is switched to the charge level 201; in a state where the actual pressure value of the accumulator 300 is greater than the charge critical pressure value of the accumulator 300, the charge valve 200 is switched to the charge stop position 202.
For example, as shown in FIG. 1, in this embodiment, the charge valve 200 is a two-position, three-way pilot operated directional valve. The two ends of the valve core of the two-position three-way hydraulic control reversing valve are respectively provided with a spring 204 and a control oil port 203. Wherein the control port 203 is connected with the accumulator 300. The preload of the spring 204 is set equal to the charge threshold pressure of the accumulator 300. The two-position three-way hydraulic control reversing valve comprises a first working oil port, a second working oil port and a third working oil port. The first working oil port is connected with an oil outlet of the hydraulic pump 100, the second working oil port is connected with the accumulator 300, and the third working oil port is connected with the oil tank 500. When the actual pressure value in the accumulator 300 is smaller than or equal to the critical pressure value of the filling, the two-position three-way pilot operated directional valve is switched to the filling position 201, at this time, the first working oil port is communicated with the second working oil port, and the oil output by the hydraulic pump 100 is conveyed into the accumulator 300. When the actual pressure value in the accumulator 300 is greater than the critical pressure value of the filling, the two-position three-way pilot operated directional valve is switched to the stop filling position 202, at this time, the first working oil port is communicated with the third working oil port, and the oil output by the hydraulic pump 100 flows back into the oil tank 500.
In one embodiment of the present utility model, the brake assembly includes a brake control valve 410 and a brake 420.
Wherein the brake 420 is connected to the accumulator 300 and the oil tank 500 through the brake control valve 410, respectively. The brake control valve 410 is used to control the communication state between the brake 420 and the accumulator 300 and the oil tank 500.
Further, in one embodiment of the present utility model, the brake control valve 410 includes a brake position 411 and a brake release position 412.
In the state of the braking position 411, the brake 420 communicates with the accumulator 300 through the brake control valve 410; in the state of the brake release position 412, the brake 420 communicates with the oil tank 500 through the brake control valve 410.
Specifically, in the embodiment shown in FIG. 1, the brake control valve 410 is a two-position three-way foot pedal reversing valve. The two-position three-way pedal reversing valve is controlled to switch between a braking position 411 and a braking release position 412 through the pedal end. The two-position three-way pedal reversing valve comprises a fourth working oil port, a fifth working oil port and a sixth working oil port. The fourth working oil port is connected with the accumulator 300, the fifth working oil port is connected with the brake 420, and the sixth working oil port is connected with the oil tank 500.
When the operator does not step on the pedal end, the two-position three-way pedal reversing valve is at the brake release position 412, at this time, the fifth working oil port is communicated with the sixth working oil port, the oil tank 500 is communicated with the brake 420, and the working machine can normally run. When an operator steps on the pedal end, the two-position three-way pedal reversing valve is switched to the braking position 411, at this time, the fifth working oil port is communicated with the fourth working oil port, the accumulator 300 is communicated with the brake 420, and the brake 420 does not provide braking power oil, so that the working machine brakes.
In addition, when the accumulator 300 is in the oil shortage state during the braking, the charging valve 200 is switched to the charging position 201, and the hydraulic pump 100 charges the accumulator 300 and simultaneously can directly supply oil to the brake 420 to directly supply oil to the brake 420.
In yet another embodiment of the present utility model, brake 420 includes a front axle brake 421 and a rear axle brake 422. The front axle brake 421 and the rear axle brake 422 are connected to the accumulator 300 and the oil tank 500 through the brake control valve 410.
In the state of the braking position 411, the front axle brake 421 and the rear axle brake 422 are simultaneously communicated with the accumulator 300 through the brake control valve 410; in the state of the brake release position 412, the front axle brake 421 and the rear axle brake 422 are simultaneously communicated with the oil tank 500 through the brake control valve 410.
For example, as shown in fig. 1, the hydraulic brake system is a single-circuit brake system. Specifically, brake 420 includes a front axle brake 421 and a rear axle brake 422. The fifth working oil port of the two-position three-way pedal reversing valve is connected with an oil supply main pipe. The front axle brake 421 and the rear axle brake 422 are both connected to the oil supply manifold through oil supply branch pipes. Thus, when the two-position three-way pedal change valve is switched to the braking position 411, the oil in the accumulator 300 is simultaneously supplied to the front axle brake 421 and the rear axle brake 422, so that the front axle brake 421 and the rear axle brake 422 simultaneously perform braking operations. When the two-position three-way foot switch valve is switched to the brake release position 412, the front axle brake 421 and the rear axle brake 422 are simultaneously communicated with the oil tank 500, and both are simultaneously released.
According to the above-described embodiments, the front axle brake 421 and the rear axle brake 422 are synchronously operated by the same accumulator 300 and the same brake control valve 410, and compared with the hydraulic brake system in the prior art in which the front axle brake 421 and the rear axle brake 422 are independently controlled, the hydraulic brake system has a simpler structure and lower cost, occupies smaller space, and is more suitable for operating machines such as loaders with small installation space.
In one embodiment of the present utility model, a check valve 600 is disposed between charge valve 200 and accumulator 300. The oil inlet of the check valve 600 is connected to the charge valve 200. An oil outlet of the check valve 600 is connected with the accumulator 300. This prevents the high-pressure oil in the accumulator 300 from flowing back, thereby preventing the hydraulic oil from flowing back and effectively protecting the hydraulic pump 100.
In yet another embodiment of the present utility model, a filter 700 is provided between the hydraulic pump 100 and the charge valve 200. For example, the filter 700 described above includes, but is not limited to, a high pressure filter. By providing the filter 700 between the hydraulic pump 100 and the charge valve 200, the cleanliness of the oil supplied to the hydraulic brake system can be improved, and the hydraulic brake system can be protected.
Embodiments of the second aspect of the present utility model provide a work machine comprising a hydraulic brake system as described above.
For example, in one embodiment of the present disclosure, the work machine includes a loader. In other embodiments of the present utility model, the work machine may further include a wheel excavator, a crane, a heading machine, or the like.
Further, in the work machine provided by the present utility model, since it includes the hydraulic brake system as described above, the advantages as described above are also provided.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. A hydraulic braking system is characterized by comprising a hydraulic pump, a charging valve, an accumulator, a braking component and an oil tank,
the hydraulic pump is connected with the energy accumulator and the oil tank through the charging valve respectively, the energy accumulator is connected with a control oil port of the charging valve so as to control the communication state of the hydraulic pump, the energy accumulator and the oil tank, and the energy accumulator is connected with the brake assembly.
2. The hydraulic brake system of claim 1 wherein the charge valve includes a charge level and a charge stop,
in the state of the charging level, the hydraulic pump is communicated with the accumulator through the charging valve; in the state of the charge stop position, the hydraulic pump communicates with the tank through the charge valve.
3. The hydraulic brake system of claim 2 wherein one end of the charge valve spool is provided with a spring, the other end of the charge valve spool is provided with the control port, the preload of the spring is equal to the charge threshold pressure value of the accumulator,
switching the charging valve to the charging position in a state that the actual pressure value of the accumulator is smaller than or equal to the charging critical pressure value of the accumulator; and the charging valve is switched to the charging stop position under the state that the actual pressure value of the accumulator is larger than the charging critical pressure value of the accumulator.
4. The hydraulic brake system of claim 1 wherein the brake assembly includes a brake control valve and a brake,
the brake is connected with the energy accumulator and the oil tank respectively through the brake control valve, and the brake control valve is used for controlling the communication state of the brake, the energy accumulator and the oil tank.
5. The hydraulic brake system of claim 4 wherein the brake control valve includes a brake position and a brake release position,
in the state of the braking position, the brake is communicated with the accumulator through the brake control valve; in the brake release position, the brake is in communication with the oil tank through the brake control valve.
6. The hydraulic brake system according to claim 5 wherein the brakes include a front axle brake and a rear axle brake, each of the front axle brake and the rear axle brake being connected to the accumulator and the oil tank by the brake control valve,
in the state of the braking position, the front axle brake and the rear axle brake are simultaneously communicated with the energy accumulator through the braking control valve; in the brake release position, the front axle brake and the rear axle brake are simultaneously communicated with the oil tank through the brake control valve.
7. The hydraulic brake system of claim 5 wherein the charge valve is a two-position three-way pilot operated directional valve and the brake control valve is a two-position three-way foot operated directional valve.
8. The hydraulic brake system of claim 1 wherein a check valve is disposed between the charge valve and the accumulator, an oil inlet of the check valve is connected to the charge valve, and an oil outlet of the check valve is connected to the accumulator.
9. The hydraulic brake system of claim 1 wherein a filter is disposed between the hydraulic pump and the charge valve.
10. A work machine comprising a hydraulic brake system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320520901.8U CN219505991U (en) | 2023-03-13 | 2023-03-13 | Hydraulic brake system and working machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320520901.8U CN219505991U (en) | 2023-03-13 | 2023-03-13 | Hydraulic brake system and working machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219505991U true CN219505991U (en) | 2023-08-11 |
Family
ID=87524641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320520901.8U Active CN219505991U (en) | 2023-03-13 | 2023-03-13 | Hydraulic brake system and working machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219505991U (en) |
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2023
- 2023-03-13 CN CN202320520901.8U patent/CN219505991U/en active Active
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