Stable module control valve
By designing a stable module control valve and utilizing an accumulator to absorb bumps and vibrations, the problem of unstable center of gravity during loader transportation was solved, improving operational comfort and safety while reducing production costs.
Patent Information
- Application Number
- CN202522361037.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-07
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-11-07
AI Technical Summary
Existing loaders lack stabilization module control valves or have complex and costly structures, leading to instability of the center of gravity during transportation, which can easily cause vibration and rollover, affecting transportation speed and maneuverability.
A stable modular control valve was designed, including a valve body, an oil inlet, an oil return port, an accumulator, a first directional valve, and a second directional valve. The accumulator absorbs the vibrations caused by bumps, and the stability is improved by using shock-absorbing damping and a safety valve. The structure is simple and the cost is low.
It improves driver comfort, reduces overall machine vibration, enhances safety, and features a simple structure, easy assembly, and long service life.
Smart Images
Figure CN223662226U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an engineering machinery, specifically to a stabilization module control valve. Background Technology
[0002] Construction machinery includes hydrostatic mini loaders, excavator loaders, and telescopic forklifts. Taking loaders as an example, when transporting heavy objects such as earth and ore, the bucket is full of heavy objects, and the center of gravity of the whole machine shifts forward. If the transportation distance is long or the road is bumpy, the whole machine will vibrate back and forth or sway left and right due to the forward shift of the center of gravity and the shortening of the moment between the center of gravity and the hinge point. In severe cases, it may lead to side tilting and overturning, resulting in safety accidents and affecting the transportation speed and maneuverability of the whole machine.
[0003] Because the oil port is directly connected to the large chamber of the lifting cylinder, the cylinders of these vehicles are relatively small and are more sensitive to leakage. Currently, most of them still rely on imports, which is costly. Moreover, the existing domestically produced valves of this type have a relatively complex structure and high design and production costs. Utility Model Content
[0004] To address the problem that existing loaders in the background art typically do not have a stabilization module control valve or have one but it has a complex structure and high cost, this utility model provides a stabilization module control valve.
[0005] The technical solution of this utility model is: a stable module control valve, including a valve body, an oil inlet, and an oil return port, and further comprising:
[0006] The first interface is located on the valve body and is used to connect to the boom's large chamber.
[0007] The second interface is located on the valve body and is used to connect to the boom chamber.
[0008] An accumulator, connected to the oil inlet, is used to absorb vibrations caused by bumps.
[0009] The first directional valve has a first state during installation and a second state in which the oil inlet is connected to the first interface.
[0010] The second directional valve has an oil inlet connected to the control chamber of the first directional valve. The second directional valve has a first position during installation and a second position that allows the pressure oil in the oil inlet to be connected to the control chamber of the first directional valve and opened. When the second directional valve is in the second position, the accumulator overcomes the elastic force of the spring chamber of the first directional valve to open the first directional valve, so that the first directional valve is in its second state.
[0011] As a further improvement of this utility model, it also includes shock absorption damping, which is used to reduce the vibration of the whole machine caused by the switching impact of the first reversing valve, and is located between the control chamber of the second reversing valve and the first reversing valve.
[0012] As a further improvement of this utility model, a safety valve is also included, which is located between the oil inlet and the oil return port to limit the maximum working pressure of the accumulator.
[0013] As a further improvement of this utility model, it also includes a regulating valve for manual adjustment of unloading in emergency situations, located between the oil inlet and the oil return port; the regulating valve has a first closed position and a second position for adjusting the flow rate when open.
[0014] As a further improvement of this utility model, the first interface is connected to the oil return port through the regulating valve when the first directional valve is in its second state and the regulating valve is in its second position.
[0015] As a further improvement of this utility model, it also includes a filling valve for filling and unloading the accumulator; the filling valve is located between the first interface and the oil inlet.
[0016] As a further improvement of this utility model, the first interface is connected to the oil inlet through a first one-way valve and a first damper.
[0017] As a further improvement of this utility model, the oil inlet is connected to the first interface through a second one-way valve and a second damper, and the orifice formed by the second damper on the valve body is larger than the orifice formed by the first damper on the valve body.
[0018] As a further improvement of this utility model, the first directional valve is a two-position four-way hydraulic directional valve.
[0019] As a further improvement of this utility model, the second directional valve is an electromagnetic directional valve, and when the second directional valve is in the first position, it cuts off the oil passage between the oil inlet and the control chamber of the first directional valve through a ball valve.
[0020] The beneficial effects of this utility model are that it incorporates a first reversing valve, a second reversing valve, and an accumulator, connecting the first reversing valve to the accumulator. The accumulator absorbs vibrations caused by bumps, improving driver comfort. This utility model also features a simple structure, convenient assembly, reliable operation, low cost, and long service life. Attached Figure Description
[0021] Appendix Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.
[0022] Appendix Figure 2 This is a schematic diagram of the structure from another perspective of an embodiment of the present invention.
[0023] Appendix Figure 3 This is a schematic diagram of the hydraulic principle of an embodiment of the present invention.
[0024] Appendix Figure 4 This is a schematic diagram of the hydraulic principle of the filling valve in an embodiment of this utility model.
[0025] Appendix Figure 5 This is a schematic diagram of the hydraulic principle of the first directional valve in this embodiment of the present invention.
[0026] Appendix Figure 6 This is a schematic diagram of the structure of the first reversing valve in this embodiment of the present invention.
[0027] Appendix Figure 7 This is a schematic diagram of the hydraulic principle used in the embodiments of this utility model.
[0028] In the diagram, 1 is the valve body; 2 is the accumulator; 3 is the first directional valve; 31 is the control chamber; 32 is the first connecting hole; 33 is the second connecting hole; 34 is the third connecting hole; 35 is the fourth connecting hole; 36 is the spring chamber; 4 is the second directional valve; 41 is the ball valve; 5 is the shock absorber; 6 is the safety valve; 7 is the regulating valve; 8 is the filling valve; 81 is the first check valve; 82 is the first damper; 83 is the second check valve; 84 is the second damper; A is the first interface; B is the second interface; P is the oil inlet; T is the oil return port. Detailed Implementation
[0029] The embodiments of this utility model will be further described below with reference to the accompanying drawings:
[0030] Depend on Figure 1 Combination Figure 2-7 As shown, a stabilization module control valve includes a valve body 1, an oil inlet P, and an oil return port T, and further includes:
[0031] The first interface A is located on the valve body 1 and is used to connect to the boom cavity.
[0032] The second interface B is located on the valve body 1 and is used to connect to the boom cavity.
[0033] Accumulator 2, connected to oil inlet P, is used to absorb vibrations caused by bumps;
[0034] The first directional valve 3 has a first state during installation and a second state in which the oil inlet P is connected to the first interface A; specifically, the first directional valve 3 is a two-position four-way hydraulic directional valve. The first connecting hole 32, the second connecting hole 33, the third connecting hole 34, and the fourth connecting hole 35 are simultaneously connected or simultaneously disconnected to facilitate oil return from the boom chamber.
[0035] The second directional valve 4 connects the oil inlet P to the control chamber 31 of the first directional valve 3. The second directional valve 4 has a first position during installation and a second position where the pressure oil at the oil inlet P is connected to and opened by the control chamber 31 of the first directional valve 3. The accumulator 2, when the second directional valve 4 is in the second position, overcomes the elastic force of the spring chamber 36 of the first directional valve 3 to open the first directional valve 3, thus placing the first directional valve 3 in its second state. The beneficial effects of this invention are that it sets up a first directional valve, a second directional valve, and an accumulator, connecting the first directional valve to the accumulator. The accumulator absorbs vibrations caused by bumps, improving driver comfort. This invention also has advantages such as simple structure, convenient assembly, reliable operation, and long service life. Further explanation with reference to the accompanying drawings: Port A connects to the large boom chamber, typically used for extending the boom; Port B connects to the small boom chamber for retracting the boom; Port T connects to the return oil; and Port P connects to the accumulator. When the vehicle is in normal operation, there is no need to activate the stability module control valve. When the oil pump is working, the oil fills the accumulator through the filling valve (first check valve and first damper). Once encountering bumpy roads or deep potholes, the stability function mode needs to be activated. The solenoid valve (second directional valve) is energized, and the accumulator pressure is transmitted through the solenoid valve to the pilot control end (control chamber) of the two-position four-way hydraulic directional valve (first directional valve), causing the valve core of the first directional valve to switch. The boom large chamber is connected to the accumulator, and the load change in the large chamber is absorbed by the accumulator, improving the driver's operating comfort, preventing rollovers, and increasing safety. Closing the solenoid valve will return the system to normal operating mode.
[0036] This invention also includes a shock-absorbing damper 5, used to reduce the overall vibration caused by the switching impact of the first directional valve 3, and is located between the second directional valve 4 and the control chamber 31 of the first directional valve 3. The shock-absorbing damper can effectively reduce the overall vibration caused by the switching impact of the first directional valve core, improving the driver's operating comfort.
[0037] This invention also includes a safety valve 6, located between the oil inlet P and the oil return port T, used to limit the maximum working pressure of the accumulator 2. This invention incorporates an accumulator safety valve to limit the maximum working pressure of the accumulator, preventing excessive internal pressure in case of accidents and improving safety performance.
[0038] This utility model also includes a regulating valve 7, used for manual adjustment and unloading in emergency situations, located between the oil inlet P and the oil return port T; the regulating valve 7 has a first closed position and a second position for adjusting the flow rate when open. Specifically, the first port A is connected to the oil return port T through the regulating valve 7 when the first directional valve 3 is in its second state and the regulating valve 7 is in its second position. The regulating valve can be manually adjusted and unloaded in emergency situations, increasing safety protection. Under normal circumstances, the regulating valve is in the closed state, generally used in emergency safety situations or when the boom cannot be lowered, at which time both A and P are connected to T for pressure relief. The opening size of the regulating valve is adjustable, allowing oil to be discharged as needed.
[0039] This utility model also includes a filling valve 8 for filling and unloading the accumulator 2; the filling valve 8 is located between the first interface A and the oil inlet P. Specifically, the first interface A is connected to the oil inlet P through a first one-way valve 81 and a first damper 82; more specifically, the oil inlet P is connected to the first interface A through a second one-way valve 83 and a second damper 84, wherein the orifice formed by the second damper 84 on the valve body 1 is larger than the orifice formed by the first damper 82 on the valve body 1. The filling valve enables the filling and unloading of the accumulator. Specifically, when the system is working, the first interface can store energy for the accumulator through the first one-way valve and the first damper. Because the system continuously outputs hydraulic pressure (even in some loaders where the hydraulic pressure in the large chamber is the same as or similar to that in the accumulator due to the same or similar hydraulic pressure), the orifice diameter of the second damper is larger than that of the first damper, and this will not affect the system or the accumulator. When the second directional valve reverses, that is, when the load in the large chamber of the boom suddenly changes, the setting of the second damper can instantly release the hydraulic pressure of the accumulator, which can improve the performance and utilization rate of the accumulator. The setting of the shock-absorbing damper can also instantly balance the impact brought by the reversing of the first directional valve.
[0040] The second directional valve 4 is a solenoid directional valve. When in its first position, the second directional valve 4 cuts off the oil passage between the oil inlet and the control chamber 31 of the first directional valve 3 via a ball valve 41. The ball valve structure of the solenoid valve in the neutral position is sealed, achieving zero leakage and providing good sealing performance, which can further reduce internal leakage.
[0041] Please note to all technical personnel: Although this utility model has been described according to the specific embodiments above, the inventive concept of this utility model is not limited to this utility model. Any modification that utilizes the inventive concept will be included within the scope of protection of this utility model patent.
Claims
1. A stabilization module control valve, comprising a valve body (1), an oil inlet (P), and an oil return port (T), characterized in that: Also includes: The first interface (A) is located on the valve body (1) and is used to connect to the boom cavity; The second interface (B) is located on the valve body (1) and is used to connect to the boom cavity; An accumulator (2) is connected to the oil inlet (P) and is used to absorb vibrations caused by bumps; The first directional valve (3) has a first state during installation and a second state in which the oil inlet (P) is connected to the first interface (A); The second directional valve (4) has an oil inlet (P) connected to the control chamber (31) of the first directional valve (3) via the second directional valve (4); the second directional valve (4) has a first position during installation and a second position that allows the pressure oil in the oil inlet (P) to be connected to the control chamber (31) of the first directional valve (3) and opened; the accumulator (2) opens the first directional valve (3) by overcoming the elastic force of the spring chamber (36) of the first directional valve (3) when the second directional valve (4) is in the second position, so that the first directional valve (3) is in its second state.
2. The stabilization module control valve according to claim 1, characterized in that... It also includes shock-absorbing damping (5), which is used to reduce the vibration of the whole machine caused by the reversing impact of the first reversing valve (3), and is located between the control chamber (31) of the second reversing valve (4) and the first reversing valve (3).
3. A stabilization module control valve according to claim 1, characterized in that... It also includes a safety valve (6), located between the oil inlet (P) and the oil return port (T), used to limit the maximum working pressure of the accumulator (2).
4. A stabilization module control valve according to claim 1, characterized in that... It also includes a regulating valve (7) for manual adjustment of unloading in emergency situations, located between the oil inlet (P) and the oil return port (T); the regulating valve (7) has a first closed position and a second position for adjusting the flow rate when open.
5. A stabilization module control valve according to claim 4, characterized in that... The first interface (A) is connected to the return port (T) through the regulating valve (7) when the first directional valve (3) is in its second state and the regulating valve (7) is in its second position.
6. A stabilization module control valve according to claim 1, characterized in that... It also includes a filling valve (8) for filling and unloading the accumulator (2); the filling valve (8) is located between the first port (A) and the oil inlet (P).
7. A stabilization module control valve according to claim 6, characterized in that... The first interface (A) is connected to the oil inlet (P) through the first check valve (81) and the first damper (82).
8. A stabilization module control valve according to claim 7, characterized in that... The oil inlet (P) is connected to the first interface (A) through the second check valve (83) and the second damper (84). The aperture of the second damper (84) on the valve body (1) is larger than the aperture of the first damper (82) on the valve body (1).
9. A stabilization module control valve according to claim 1, characterized in that... The first directional valve (3) is a two-position four-way hydraulic directional valve.
10. A stabilization module control valve according to claim 1, characterized in that... The second directional valve (4) is an electromagnetic directional valve. When the second directional valve (4) is in the first position, it cuts off the oil passage between the oil inlet and the control chamber (31) of the first directional valve (3) through the ball valve (41).