CN218264029U - Boom damping system and work machine - Google Patents
Boom damping system and work machine Download PDFInfo
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- CN218264029U CN218264029U CN202221651532.8U CN202221651532U CN218264029U CN 218264029 U CN218264029 U CN 218264029U CN 202221651532 U CN202221651532 U CN 202221651532U CN 218264029 U CN218264029 U CN 218264029U
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Abstract
The utility model relates to an operation machinery technical field provides a swing arm shock mitigation system and operation machinery. The boom damping system includes: the system comprises a movable arm oil cylinder, a control module, a damping control valve, an energy storage device, a detection device and a control module; the control module is connected with the movable arm oil cylinder and can generate an action instruction based on operation and control the movable arm oil cylinder to stretch and retract; a rodless cavity of the movable arm oil cylinder is connected with the energy storage device through a damping control valve, and a rod cavity of the movable arm oil cylinder is connected with the oil return pipeline through the damping control valve; the detection device is connected with the control module and used for detecting an action instruction; the control module is respectively connected with the detection device and the damping control valve and controls the damping control valve to be opened and closed based on the action instruction. The movable arm damping system can control the damping control valve based on the operation of an operator on the control module, the damping control valve does not need to be closed manually, the problem that the damping control valve is not closed when the movable arm oil cylinder is controlled to act is solved, and the use safety is ensured.
Description
Technical Field
The utility model relates to an operation machinery technical field especially relates to a swing arm shock mitigation system and operation machinery.
Background
In order to reduce vibration during traveling, a loader is generally provided with a boom shock absorbing function. A rodless cavity of the movable arm oil cylinder is connected with the energy storage device through a damping control valve, and a rod cavity of the movable arm oil cylinder is connected with the oil return pipeline through the damping control valve. When the loader transports materials, the damping control valve is opened, and when the movable arm fluctuates, hydraulic oil in the rodless cavity enters the energy storage device through the damping control valve, or the hydraulic oil in the energy storage device is supplemented into the rodless cavity through the damping control valve, so that the effect of adjusting the pressure of the oil cylinder of the movable arm is achieved. In addition, during the cutting work, the damping control valve needs to be closed in order to prevent the boom damping system from affecting the operation of the boom. In the prior art, a damping control valve usually needs to be closed by manual operation, so that the problem of misoperation can occur, and potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
The utility model provides a swing arm shock mitigation system and operation machinery for solve among the prior art shock attenuation control valve and need the manual operation to close, there is the defect of potential safety hazard, realize preventing the maloperation, improve the effect of safety in utilization.
The utility model provides a swing arm shock mitigation system, include: the system comprises a movable arm oil cylinder, a control module, a damping control valve, an energy storage device, a detection device and a control module;
the control module is connected with the movable arm oil cylinder and can generate an action instruction based on the operation of an operator and control the movable arm oil cylinder to stretch and retract;
a rodless cavity of the movable arm oil cylinder is connected with the energy storage device through the damping control valve, and a rod cavity of the movable arm oil cylinder is connected with an oil return pipeline through the damping control valve;
the detection device is connected with the control module and used for detecting the action command;
the control module is respectively connected with the detection device and the damping control valve and controls the damping control valve to be opened and closed based on the action instruction.
According to the utility model provides a movable arm damping system, the control module comprises a reversing valve and a control handle;
the reversing valve is connected with the movable arm oil cylinder and is provided with a valve core driving mechanism for driving a valve core of the reversing valve to act;
the control handle is provided with a command output end, the command output end is connected with the valve core driving mechanism and used for controlling the action of the valve core driving mechanism, and the command output end is connected with the control module.
According to the utility model provides a pair of swing arm shock mitigation system, detection device includes first detecting element, the switching-over valve is equipped with a pair ofly case actuating mechanism is used for driving respectively the case of switching-over valve moves to opposite direction, operating handle is equipped with a pair ofly the instruction output, respectively with correspond case actuating mechanism connects, first detecting element and control the swing arm hydro-cylinder withdrawal the instruction output is connected.
According to the utility model provides a pair of movable arm shock mitigation system, detection device still includes second detecting element, second detecting element and control the movable arm hydro-cylinder stretches out the instruction output is connected.
According to the utility model provides a swing arm shock mitigation system, the switching-over valve is the switching-over valve that surges, case actuating mechanism is the guide's oil circuit of the switching-over valve that surges, the detection device is the pressure detection device;
or, the reversing valve is an electromagnetic reversing valve, the valve core driving mechanism is an electromagnetic driving circuit of the electromagnetic reversing valve, and the detection device is an electric signal detection device.
According to the utility model provides a pair of swing arm shock mitigation system still includes the switch, the switch with control module is connected, control module can be according to receiving the signal control of switch the shock attenuation control valve is opened and close.
According to the utility model provides a movable arm shock mitigation system, the shock absorption control valve comprises a first two-position two-way reversing valve and a second two-position two-way reversing valve;
a rodless cavity of the movable arm oil cylinder is connected with the energy storage device through the first two-position two-way reversing valve;
and a rod cavity of the movable arm oil cylinder is connected with the oil return pipeline through the second two-position two-way reversing valve.
According to the utility model provides a pair of movable arm shock mitigation system, the shock attenuation control valve still includes the choke valve, the choke valve with first two-position two-way reversing valve parallelly connected set up in the movable arm hydro-cylinder with between the energy storage equipment.
According to the utility model provides a pair of swing arm shock mitigation system, when the case of first two-position two-way reversing valve is in the closed, swing arm hydro-cylinder's rodless chamber to energy storage device one-way switch on.
The utility model also provides an operation machinery, including the swing arm with as above swing arm shock mitigation system.
The utility model provides a swing arm shock mitigation system, when the transportation material, the shock attenuation control valve is opened, and the rodless chamber of swing arm hydro-cylinder passes through shock attenuation control valve and energy storage equipment intercommunication, has the pole chamber to pass through shock attenuation control valve and return oil pipe way intercommunication to make energy storage equipment can absorb the pressure pulse and the flow fluctuation of rodless intracavity, thereby form the buffering to the swing arm, prevent to jolt in-process swing arm and drive the whole production of operation machinery and lean forward, and then improve the stationarity that operation machinery went.
When the transportation is finished or the shoveling is required, the boom needs to be operated, and at the moment, an operator operates the control module, and the control module generates an operation instruction based on the operation of the operator and controls the operation of the boom cylinder based on the operation of the operator. The detection device can detect an action instruction generated by the control module and transmits the action instruction to the control module, and the control module controls the damping control valve to be closed based on the action instruction transmitted by the detection device so as to avoid the damping control valve from influencing the action of the movable arm oil cylinder.
According to the configuration, the utility model provides a swing arm shock mitigation system can control the shock attenuation control valve based on the operation of operator to control module to make operation machinery when perhaps shovel dress operation after the transportation, need not artificial closing shock attenuation control valve, do not close the problem of shock attenuation control valve when can not appearing controlling the action of swing arm hydro-cylinder, guaranteed the safety in utilization.
Further, the utility model provides an operation machinery is owing to contained the utility model provides a swing arm shock mitigation system has just also contained all advantages of the above-mentioned of swing arm shock mitigation system simultaneously.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a boom damping system provided in an embodiment of the present invention.
Reference numerals:
1. a damping control valve; 101. a first two-position two-way directional valve; 102. a second two-position two-way directional valve; 103. a throttle valve;
2. a boom cylinder; 3. a diverter valve; 4. an energy storage device; 5. a control module; 6. an oil tank; 7. a first detection element; 8. a switch; 9. a control handle; 10. a second detection element.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are 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 efforts belong to the protection scope of the present invention.
The following describes a boom damping system provided in an embodiment of the present invention with reference to fig. 1.
Specifically, the boom damping system includes a boom cylinder 2, a manipulation module, a damping control valve 1, an energy storage device 4, a detection device, and a control module 5.
The control module is connected with the movable arm oil cylinder 2, and can generate an action instruction based on the operation of an operator and control the movable arm oil cylinder 2 to stretch and retract. Specifically, the manipulation module can generate a corresponding operation command based on an operation of an operator, and control the boom cylinder 2 to extend and retract based on the operation of the operator.
A rodless cavity of the movable arm oil cylinder 2 is connected with the energy storage device 4 through the damping control valve 1, and a rod cavity of the movable arm oil cylinder 2 is connected with the oil return pipeline through the damping control valve 1. The energy storage means 4 may be provided as an energy accumulator.
The detection device is connected with the control module and used for detecting the action command.
The control module 5 is respectively connected with the detection device and the damping control valve 1, and controls the damping control valve 1 to be opened and closed based on the action instruction transmitted by the detection device.
The embodiment of the utility model provides an embodiment provides a swing arm shock mitigation system, when the transportation material, damping control valve 1 is opened, swing arm hydro-cylinder 2's rodless chamber passes through damping control valve 1 and energy storage device 4 intercommunication, there is the pole chamber to pass through damping control valve 1 and return oil pipe way intercommunication, so that energy storage device 4 can absorb pressure pulse and the flow fluctuation of rodless intracavity, thereby form the buffering to the swing arm, prevent that the in-process swing arm of jolting from driving that the whole production of operation machinery leans forward, and then improve the stationarity that operation machinery went.
Specifically, in the bumping process, when the boom is pressed down, the pressure in the rodless cavity of the boom cylinder 2 increases, at this time, the hydraulic oil in the rodless cavity enters the energy storage device 4 through the damping control valve 1, and the pressure in the rodless cavity decreases, so that the impact between the boom and the boom cylinder is buffered. The volume of the rod cavity is increased, so that the rod cavity can absorb oil from the oil tank, and cavitation erosion on the inner wall of the movable arm oil cylinder 2 caused by gas separation in hydraulic oil due to negative pressure generated in the rod cavity is avoided. When the rod chamber is pressurized, the hydraulic oil in the rod chamber flows back to the oil tank 6.
As described above, when the damping control valve 1 is in the open state, the rod chamber of the boom cylinder 2 is connected to the oil return line, and if the boom cylinder 2 is controlled to be shortened directly by the manipulation module without closing the damping control valve 1, the hydraulic oil in the oil supply line may return to the oil tank 6 through the damping control valve 1, which may cause uncertainty in the operation of the boom cylinder 2. Therefore, the damper control valve 1 needs to be closed after the end of transportation or when the shovel is required.
After the transportation is finished or when the shovel loading is required, the boom needs to be moved, at the moment, an operator operates the control module, the control module generates a movement instruction based on the operation of the operator, and the movement of the boom cylinder is controlled based on the operation of the operator. The detection device can detect an action command generated by the control module and transmit the action command to the control module 5, and the control module 5 controls the damping control valve 1 to be closed based on the action command transmitted by the detection device, so that the damping control valve 1 is prevented from influencing the action of the boom cylinder 2.
According to the configuration, the utility model provides a swing arm shock mitigation system can control shock attenuation control valve 1 based on the operation of operator to control module to make the operation machinery after the transportation or when shovel dress operation, need not artificially to close shock attenuation control valve 1, do not close shock attenuation control valve 1's problem when can not appearing controlling swing arm hydro-cylinder 2 actions, guaranteed safety in utilization.
In some embodiments provided by the present invention, the operating module comprises a reversing valve and an operating handle 9.
The reversing valve 3 is connected with the boom cylinder 2. The reversing valve 3 is provided with a valve core driving mechanism for driving the valve core of the reversing valve 3 to act.
For example, the port P of the change valve 3 is connected to the oil supply line, the port O is connected to the oil return line, the port a is connected to the rodless chamber, and the port B is connected to the rod chamber. The oil supply line can be communicated with the rodless chamber or the rod chamber of the boom cylinder 2 by moving the spool of the directional valve 3 to extend or retract the piston rod of the boom cylinder 2. Further, the directional control valve 3 further includes a neutral position, and when the spool of the directional control valve 3 is in the neutral position, the boom cylinder 2 is maintained in the current state and is neither extended nor shortened.
The operating handle 9 is provided with a command output. The instruction output end is connected with a valve core driving mechanism of the reversing valve 3 and is used for controlling the valve core driving mechanism to act. Namely, the command output end controls the state of the reversing valve 3 by controlling the valve core driving mechanism to act, and further controls the action state of the boom cylinder 2.
Therefore, when an operator wants to control the reversing valve 3 to move by operating the operating handle 9 so as to extend and retract the boom cylinder, the operating handle 9 necessarily generates a corresponding action signal, and at the moment, the detection device can transmit the action signal to the control module 5 so that the control module 5 controls the damping control valve 1 to move, so that the damping control valve 1 is linked with the operating handle 9, the damping control valve 1 does not need to be operated independently, and the safety problem caused by misoperation can be avoided.
In some embodiments of the present invention, the detection device comprises a first detection element 7. The direction valve 3 is provided with a pair of valve core driving mechanisms for respectively driving the valve cores of the direction valve 3 to move in opposite directions. The control handle 9 is provided with a pair of instruction output ends which are respectively connected with the corresponding valve core driving mechanisms. The first detection element 7 is connected to an instruction output terminal controlling retraction of the boom cylinder 2, and the first detection element 7 is connected to the control module 5.
In this way, when the first detection element 7 detects an action command, which indicates that the operator intends to control the boom cylinder 2 to retract, the first detection element 7 transmits the action command to the control module 5, and the control module 5 controls the damper control valve 1 to close, thereby preventing the damper control valve 1 from affecting the action of the boom cylinder.
Specifically, the control module 5 sends a control signal to the damping control valve 1 after receiving the signal of the first detecting element 7, so as to control the damping control valve to act. Any Controller capable of executing the above process may be used, for example, the control module 5 includes, but is not limited to, a single chip microcomputer and a Programmable Logic Controller (PLC).
In some embodiments provided herein, the detection device further comprises a second detection element 10. The second detection element 10 is connected to the control module 5. The second detection element 10 is connected to a command output terminal that controls extension of the boom cylinder 2. The control module 5 controls the damping control valve 1 to open on condition of determining that the signal transmitted by the first detection element 7 is the same as the signal transmitted by the second detection element 10 and is maintained for a preset time period.
During the transportation of the material by the working machine, the boom cylinder 2 is usually neither extended nor shortened, i.e. the spool of the directional valve 3 is in the neutral position, so that the signal transmitted by the first detecting element 7 to the control module is the same as the signal transmitted by the second detecting element 10 to the control module. After the signal transmitted by the first detection element 7 is the same as the signal transmitted by the second detection element 10 and is kept for a preset time, it can be determined that the working machine is in the material transportation process at this time, and the control module 5 controls the damping control valve 1 to be opened so as to buffer and damp the movable arm. Therefore, the damping control valve 1 is opened without manual operation, and the use is more convenient. It should be noted that the preset time period may be determined according to actual conditions or empirical values, which is not limited herein.
For example, the control module 5 comprises a comparison module by means of which it can be determined whether the signal transmitted by the first detection element 7 is identical to the signal transmitted by the second detection element 10.
The utility model provides an in some embodiments, switching-over valve 3 sets up to the switching-over valve that surges, and case actuating mechanism is the guide's oil circuit of the switching-over valve that surges, and the instruction output is connected with the guide's oil circuit of the switching-over valve that surges. The detection device is a pressure detection device.
Optionally, the operating handle 9 is a handle pilot valve, the pilot oil is connected with the reversing valve 3 through the handle pilot valve, and an operator can make the control oil enter any pilot oil path through the operating handle 9, so that the pilot oil pushes the valve core of the reversing valve 3 to displace.
Alternatively, the first detection element 7 and the second detection element 10 are both provided as pressure detection means, for example, the pressure detection means may be provided as a pressure sensor. When the pilot oil enters a pilot oil path that controls the retraction of the boom cylinder 2, the first detection element 7 can detect a pressure signal and transmit the pressure signal to the control module 5. When the pilot oil enters the pilot oil path controlling the extension of the boom cylinder 2, the second sensing element 10 can sense a pressure signal and transmit the pressure signal to the control module 5. It should be noted that the pressure action of the pilot oil is understood as an action command.
The utility model provides an in some embodiments, switching-over valve 3 sets up to the electromagnetic reversing valve, and case actuating mechanism is the electromagnetic drive circuit of electromagnetic reversing valve, and the instruction output is connected with the electromagnetic drive circuit of electromagnetic reversing valve. The power supply can be connected to the electromagnetic drive circuit via the operating handle 9. The electromagnetic driving circuit is an electromagnet driving element, the electromagnet generates magnetic force by electrifying so as to drive the valve core to act, and the valve core can reset under the action of the spring after power failure. The detection device is an electric signal detection device.
For example, the first detection element 7 and the second detection element 10 are both electric signal detection devices. For example, the electric signal detection means may be provided as a current sensor or a voltage sensor. The first detection element 7 can simultaneously detect an electric signal and transmit the electric signal to the control module 5 when the electromagnetic driving circuit controlling the retraction of the boom cylinder 2 obtains a current or a voltage. When the electromagnetic driving circuit controlling the boom cylinder 2 to extend obtains a current or a voltage, the second detection element 10 can simultaneously detect an electrical signal and transmit the electrical signal to the control module 5. It should be noted that the current applied to the coil or the voltage applied to the coil may be understood as an operation command.
The utility model provides an in some embodiments, movable arm shock mitigation system still includes switch 8, and switch 8 is connected with control module 5, and control module 5 can open and close according to the signal control shock attenuation control valve 1 of the switch 8 that receives. The switch 8 is arranged, so that an operator can manually control the damping control valve 1 to be opened and closed, and the damping control valve is matched with the automatic control of the control module 5, so that the damping system of the moving arm is more convenient to use.
Referring to fig. 1, in some embodiments provided by the present invention, the damping control valve 1 includes a first two-position two-way directional valve 101 and a second two-position two-way directional valve 102.
The rodless cavity of the boom cylinder 2 is connected with the energy storage device 4 through a first two-position two-way reversing valve 101. When the valve core of the first two-position two-way reversing valve 101 is in the open position, the energy storage device 4 is communicated with the rodless cavity of the boom cylinder 2, and at the moment, hydraulic oil between the energy storage device 4 and the rodless cavity can be communicated with each other, so that the energy storage device 4 can balance and buffer the pressure in the rodless cavity.
Referring to fig. 1, further, when the spool of the first two-position two-way reversing valve 101 is in the closed position, the rodless cavity of the boom cylinder 2 is in one-way communication with the energy storage device 4. Thus, when the spool of the first two-position two-way selector valve 101 is in the closed position, the oil supply line supplies oil to the rodless chamber of the boom cylinder 2, and at the same time, hydraulic oil can be supplied to the energy storage device 4.
And a rod cavity of the movable arm oil cylinder 2 is connected with an oil return pipeline through a second two-position two-way reversing valve 102. When the spool of the second two-position two-way selector valve 102 is in the open position, the rod chamber of the boom cylinder 2 can communicate with the oil tank 6, so that the rod chamber can drain oil to the oil tank 6 or suck oil from the oil tank 6.
Further, when the spool of the second two-position two-way selector valve 102 is in the closed position, the oil return line is in one-way communication with the rod cavity of the boom cylinder 2. Therefore, when the valve core of the second two-position two-way reversing valve 102 is in a closed position, the oil supply pipeline supplies oil to the rod cavity of the boom cylinder 2, and the oil cannot enter the oil tank 6 through the second two-position two-way reversing valve 102, so that the action of the boom cylinder 2 is prevented from being influenced. Meanwhile, when the boom cylinder 2 does not have power to fall back, that is, the boom cylinder 2 is shortened under the action of the gravity of the boom, at this time, the rod chamber can suck oil from the cylinder through the second two-position two-way selector valve 102.
In some embodiments provided by the utility model, the damping control valve 1 still includes the choke valve 103, and choke valve 103 sets up between movable arm hydro-cylinder 2 and energy storage device 4 with first two-position two-way switching-over valve 101 parallelly connected. By arranging the throttle valve 103, when the damping control valve 1 is in a closed state, the energy storage device 4 can be communicated with the rodless cavity of the boom cylinder 2 through the throttle valve 103 to adjust the pressure difference between the energy storage device 4 and the rodless cavity, and the problem of impact caused by overlarge pressure difference between the energy storage device 4 and the rodless cavity when the damping control valve 1 is opened is avoided.
The embodiment of the utility model provides an in still provide an operation machinery.
Specifically, a work machine includes a boom and a boom dampening system as described above.
It should be noted that the work machine includes the boom damping system and also includes all the advantages of the boom damping system, which are not described herein again.
Meanwhile, the working machine of the present invention includes, but is not limited to, a loader.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A boom dampening system, comprising: the system comprises a movable arm oil cylinder, a control module, a damping control valve, an energy storage device, a detection device and a control module;
the control module is connected with the movable arm oil cylinder and can generate an action instruction based on the operation of an operator and control the movable arm oil cylinder to stretch and retract;
a rodless cavity of the movable arm oil cylinder is connected with the energy storage device through the damping control valve, and a rod cavity of the movable arm oil cylinder is connected with an oil return pipeline through the damping control valve;
the detection device is connected with the control module and used for detecting the action command;
the control module is respectively connected with the detection device and the damping control valve and controls the damping control valve to be opened and closed based on the action instruction.
2. The boom damping system of claim 1, wherein the handle module includes a reversing valve and a handle grip;
the reversing valve is connected with the movable arm oil cylinder and is provided with a valve core driving mechanism for driving a valve core of the reversing valve to act;
the control handle is provided with a command output end, the command output end is connected with the valve core driving mechanism and used for controlling the action of the valve core driving mechanism, and the command output end is connected with the control module.
3. The boom damping system according to claim 2, wherein the detection means includes a first detection member, the direction valve is provided with a pair of spool driving mechanisms for driving the spools of the direction valve to move in opposite directions, respectively, the manipulation handle is provided with a pair of command outputs connected to the corresponding spool driving mechanisms, respectively, and the first detection member is connected to the command output for controlling the retraction of the boom cylinder.
4. The boom shock absorbing system according to claim 3, wherein the detection device further comprises a second detection element connected to the command output terminal controlling the boom cylinder to be extended.
5. The boom damping system according to claim 2, wherein the directional valve is a hydraulically operated directional valve, the spool drive mechanism is a pilot oil path of the hydraulically operated directional valve, and the detection device is a pressure detection device;
or, the reversing valve is an electromagnetic reversing valve, the valve core driving mechanism is an electromagnetic driving circuit of the electromagnetic reversing valve, and the detection device is an electric signal detection device.
6. The boom damping system according to any one of claims 1 to 5, further comprising a switch, wherein the switch is connected to the control module, and the control module controls the damping control valve to open and close according to a signal received from the switch.
7. The boom dampening system of claim 1, wherein the dampening control valve includes a first two-position, two-way directional valve and a second two-position, two-way directional valve;
a rodless cavity of the movable arm oil cylinder is connected with the energy storage device through the first two-position two-way reversing valve;
and a rod cavity of the movable arm oil cylinder is connected with the oil return pipeline through the second two-position two-way reversing valve.
8. The boom reducing system according to claim 7, wherein the damping control valve further comprises a throttle valve disposed between the boom cylinder and the energy storage device in parallel with the first two-position two-way selector valve.
9. The boom damping system according to claim 7, wherein when a spool of the first two-position two-way selector valve is in a closed position, a rodless chamber of the boom cylinder is in one-way communication with the energy storage device.
10. A work machine comprising a boom and a boom damping system according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221651532.8U CN218264029U (en) | 2022-06-28 | 2022-06-28 | Boom damping system and work machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221651532.8U CN218264029U (en) | 2022-06-28 | 2022-06-28 | Boom damping system and work machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218264029U true CN218264029U (en) | 2023-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221651532.8U Active CN218264029U (en) | 2022-06-28 | 2022-06-28 | Boom damping system and work machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218264029U (en) |
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2022
- 2022-06-28 CN CN202221651532.8U patent/CN218264029U/en active Active
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