Double-throttle-valve control module and hydraulic system

Abstract

The invention relates to the technical field of hydraulic pressure, in particular to a double-throttle-valve control module and a hydraulic system. A double throttle valve control module comprises a valve body provided with a plurality of oil ports; the two sets of throttle valve assemblies are symmetrically arranged in the valve body, each throttle valve assembly comprises a valve element, and the valve elements abut against each other under the action of an elastic piece so as to block communication between the oil ports; and the driving part is located between the two sets of throttling valve assemblies, gaps are reserved between the two ends of the driving part and the two valve elements correspondingly, and the driving part pushes the valve element on the single side to be opened so as to control the opening degree. A hydraulic system includes: a hydraulic cylinder; and one set of throttle valve assembly of the double-throttle valve control module controls the hydraulic cylinder to ascend, and the other set of throttle valve assembly of the double-throttle valve control module controls the hydraulic cylinder to descend. The problems that in the prior art, each throttling valve needs to be correspondingly provided with a driving device, and the occupied space is large; or a shared driving device can cause linkage between the throttle valves, and independent control cannot be achieved.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic technology, and in particular to a dual throttle valve control module and a hydraulic system. Background Art

[0002] In hydraulic systems, a two-position two-way throttle valve is a very common control element used to control the on-off between two oil ports and the flow area of ​​the valve port. However, when performing motion control on actuators such as lifting hydraulic cylinders, two or even more two-position two-way throttle valves are often required. The common solution is to use multiple plate-type two-position two-way throttle valves, or install multiple two-position two-way throttle valve plug-ins on the integrated valve group. In this way, whether the throttle valve is manually driven or solenoid driven, the entire control system will require multiple drive devices, which not only takes up a large space but also has a high cost.

[0003] There is another way to control multiple valve ports with fewer drive devices, that is, multi-position multi-way reversing valve (such as two-position three-way, three-position four-way reversing valve). However, this reversing valve uses a valve core to control the on and off of multiple oil ports, and all valve ports are linked and coupled, and it does not have the function of independently controlling the area of ​​multiple valve ports. Summary of the invention

[0004] In order to solve the technical problems in the prior art that each throttle valve needs to be provided with a corresponding driving device, which occupies a large space; or the shared driving device will cause the throttle valves to be linked and cannot be controlled independently, the present invention provides a dual throttle valve control module and a hydraulic system to solve the above technical problems.

[0005] In order to solve the above technical problems, the present invention provides a dual throttle valve control module, comprising: A valve body, wherein a plurality of oil ports are arranged on the valve body; A throttle valve assembly, wherein the throttle valve assembly is divided into two groups and symmetrically arranged in the valve body, wherein the throttle valve assembly comprises a valve core, and the valve core abuts against each other under the action of an elastic member to block the communication between the oil ports; A driving member is located between the two groups of throttle valve assemblies, and gaps are left between the two ends of the driving member and the two valve cores respectively. The driving member pushes the single-side valve core to open to control the opening degree.

[0006] According to an embodiment of the present invention, a through hole communicating with both ends is formed in the valve core, a flow groove is formed on the driving member, and the cavity between the valve core and the driving member is connected to the oil return port through the flow groove.

[0007] According to one embodiment of the present invention, the middle portion of the driving member is reduced in size and connected to the oil return port, and the flow grooves are formed at both ends of the driving member, and the flow grooves extend from the end surface of the driving member to the middle portion of the driving member.

[0008] According to one embodiment of the present invention, the flow groove includes a radial groove located on the end surface of the driving member and an axial groove located on the outer peripheral surface of the driving member.

[0009] According to an embodiment of the present invention, the driving member performs axial reciprocating motion under the drive of the driving device, teeth are formed in the middle of the driving member, and the driving device drives the driving member through a gear set.

[0010] According to one embodiment of the present invention, the gear set includes a first gear shaft and a second gear shaft, a large gear and a first small gear are coaxially arranged on the first gear shaft, a second small gear is arranged on the second gear shaft, the first small gear is meshed with the driving member, the large gear is meshed with the second small gear, and the second small gear is driven externally.

[0011] According to one embodiment of the present invention, the throttle valve assembly also includes a valve sleeve and a screw plug, which are arranged in the valve body, one end of the valve core close to the driving member is slidably matched with the valve sleeve, and the other end of the valve core slides along the screw plug, and the outer surface of the valve core is formed with a conical surface that rests on the valve sleeve.

[0012] According to an embodiment of the present invention, the outer diameters at both ends of the valve core and the corresponding diameters at the position where the valve core abuts are equal.

[0013] The present invention also provides a hydraulic system, comprising: Hydraulic cylinder; A dual throttle valve control module, one set of throttle valve assemblies controls the lifting of the hydraulic cylinder, and the other set of throttle valve assemblies controls the lowering of the hydraulic cylinder.

[0014] According to one embodiment of the present invention, an oil inlet and an oil outlet are provided on the valve body for each group of throttle valve assemblies, one of the oil inlets introduces pressurized oil, and the corresponding oil outlet is unidirectionally connected to the rodless chamber of the hydraulic cylinder; the other oil inlet is connected to the rodless chamber of the hydraulic cylinder, and the corresponding oil outlet is connected to the oil tank.

[0015] Based on the above technical solution, the technical effects that can be achieved by the present invention are: 1. In the dual throttle valve control module of the present invention, the driving member is located between the two throttle valve assemblies, and a gap is left between the two valve cores. When the driving member moves to one side, it can push the valve core on one side to open and control the opening, while the throttle valve assembly on the other side remains in the initial state; when the driving member moves to the other side, it can push the valve core on the other side to open and control the opening, while the valve core on one side remains in the initial state, that is, the driving member can control the opening of the throttle valve assemblies on both sides, and when the driving member controls the opening of one throttle valve assembly, it will not cause the linkage of the other throttle valve assembly, and the two throttle valve assemblies can be independently controlled; 2. The dual throttle valve control module of the present invention can ensure the same pressure at both ends of the valve core by providing a through hole connecting the two ends in the valve core; a flow groove is formed on the driving member, and the cavity between the valve core and the driving member is connected to the oil return port through the flow groove, so that both ends of the valve core are in a low-pressure and connected state, and the movement of the valve core will not be affected by the imbalance of pressure on both sides, and the valve core responds quickly and accurately; the middle size of the driving member is further reduced, which can reduce the fine processing area required for the sliding fit between the driving member and the inner wall of the valve body, which is convenient for processing the driving member, and can also keep the position of the middle part of the driving member connected to the oil return port; the flow groove includes a radial groove and an axial groove, which can ensure the connection between the cavities and ensure the force balance of the driving member; 3. In the dual throttle valve control module of the present invention, the driving member is driven by the driving device through a gear set, which has high precision and can achieve accurate control of the opening. By specifically setting the structure of the gear set, the displacement of the driving member can be finely controlled through the transmission of large and small gears, and each displacement of the driving member corresponds to the change in the opening of the throttle valve assembly, so the opening of the throttle valve assembly can also be finely controlled; the second small gear can be driven manually or electrically. When driven manually, the handle can be fixedly connected to the second gear shaft, and the opening of the corresponding throttle valve assembly can be adjusted by the angle of the manual operation handle; when driven electrically, a high-response motor can be fixedly connected to the second gear shaft, not only can the valve opening be calculated by the angle of motor rotation, thereby performing closed-loop control of the lifting and lowering speed of the hydraulic cylinder piston, but also a specific opening time (such as PWM pulse width modulation) can be set for the two throttle valve assemblies within a shorter period, and the motion state of the hydraulic cylinder piston can be finely controlled in combination with position, speed, and force sensors; 4. In the dual throttle valve control module of the present invention, the two ends of the valve core are respectively slidably matched with the valve sleeve and the screw plug. The outer diameter of one end of the valve core that is slidably matched with the screw plug is equal to the diameter of the valve core against the valve sleeve, which can ensure that the pressure of the second oil port of the screw plug has the same force on the valve core in two axial directions, thereby preventing the pressure of the second oil port of the screw plug from pressing the valve core against the valve sleeve; the outer diameter of one end of the valve core that is slidably matched with the valve sleeve is equal to the diameter of the valve core against the valve sleeve, thereby ensuring that the pressure of the first oil port of the valve sleeve has the same force on the valve core in two axial directions, thereby preventing the pressure of the first oil port of the valve sleeve from pushing the valve core away from the valve sleeve. That is, the above-mentioned setting of the diameter relationship can ensure that the force of the oil port on the valve core of the throttle valve assembly is balanced without affecting the movement of the valve core; 5. The hydraulic system of the present invention controls the oil inlet and oil return speed of the hydraulic cylinder through the dual throttle valve control module, thereby realizing the control of the lifting and lowering speed of the hydraulic cylinder. Specifically, the connection relationship between the oil port of the dual throttle valve control module and the hydraulic cylinder is set. When the driving part pushes the valve core of the throttle valve assembly that controls the lifting of the hydraulic cylinder to slide and open, the pressure oil enters from the oil inlet to the oil outlet, and then opens the one-way valve to enter the rodless chamber of the single-acting hydraulic cylinder, and the hydraulic cylinder piston is lifted at a certain speed; when the driving force is cancelled, the driving part returns to the middle position, the throttle valve assembly is closed, the pressure oil is blocked, and the one-way valve is closed by the high-pressure oil in the rodless chamber of the hydraulic cylinder; the other set of throttle valve assemblies is also in a closed state, so the hydraulic cylinder piston can maintain its height for a long time, and the piston will not continue to fall under the action of gravity due to excessive leakage of the rodless chamber oil. When the driving part pushes the valve core of the throttle valve assembly that controls the descent of the hydraulic cylinder to slide and open, the oil in the rodless chamber of the hydraulic cylinder enters from the corresponding oil inlet to the oil outlet and returns to the oil tank, and the hydraulic cylinder piston falls at a certain speed. Usually, the hydraulic lifting system does not require the lifting and lowering valves to be fully open at the same time, so the control module is highly compatible with the hydraulic lifting system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a dual throttle valve control module; Figure 2 is a cross-sectional view of a dual throttle valve control module; Figure 3 for Figure 2 A partial enlarged view of Figure 4 It is a schematic diagram of the structure of the cooperation between the driving member and the gear set; Figure 5 is a schematic diagram of the structure of the driving member; Figure 6 It is the hydraulic principle diagram of the hydraulic system; In the figure: 1-valve body; 11-oil inlet; 12-oil outlet; 13-oil return port; 14-installation cavity; 2-throttle valve assembly; 21-valve core; 211-through hole; 212-first end; 213-second end; 214-conical surface; 215-annular protrusion; 22-elastic member; 23-valve sleeve; 231-first oil port; 24-screw plug; 241-second oil port; 25-first cavity; 26-second cavity; 271-first sealing member; 272- The second seal; 273-the third seal; 28-gasket; 3-driving member; 31-flow groove; 311-radial groove; 312-axial groove; 32-tooth; 33-section; 34-circumferential surface; 4-gear set; 41-first gear shaft; 42-large gear; 43-first small gear; 44-second gear shaft; 45-second small gear; 5-hydraulic cylinder; 51-piston; 52-rod chamber; 53-rodless chamber; 6-check valve; 7-oil tank. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0019] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0020] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0021] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0022] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0023] like Figure 1-5As shown, this embodiment proposes a dual throttle valve control module, including a valve body 1, a throttle valve assembly 2 and a driving member 3. A plurality of oil ports are arranged on the valve body 1. The throttle valve assembly 2 is divided into two groups. The two groups of throttle valve assemblies 2 are symmetrically arranged in the valve body 1. In the initial state, the valve core 21 of the throttle valve assembly 2 forms an abutment under the action of the elastic member 22 to block the communication between the oil ports; the driving member 3 is located between the two groups of throttle valve assemblies 2, and a gap is left between the two ends of the driving member 3 and the two valve cores 21. The axial movement of the driving member 3 can push the valve core 21 on one side to open to control the opening, and the valve core 21 on the other side maintains the initial state.

[0024] like Figure 1-2 As shown, a mounting cavity 14 is formed in the valve body 1 to facilitate the assembly of the throttle valve assembly 2 and the driving member 3. A plurality of oil ports are formed on the valve body 1, each of which is connected to the mounting cavity 14. Specifically, for each set of throttle valve assemblies 2, an oil inlet 11 and an oil outlet 12 are provided on the valve body 1, and the valve core 21 of the throttle valve assembly 2 is abutted against the elastic member 22 to block the communication between the corresponding oil inlet 11 and the oil outlet 12.

[0025] As a preferred technical solution of this embodiment, the installation cavity 14 passes through the valve body 1, and the middle space of the installation cavity 14 is enlarged to facilitate the assembly of the gear set 4.

[0026] As a preferred technical solution of this embodiment, the oil inlets 11 and the oil outlets 12 corresponding to the two groups of throttle valve assemblies 2 are respectively located at the two ends of the valve body 1 and are symmetrically arranged. The valve body 1 can be arranged as a symmetrical structure.

[0027] As a preferred technical solution of this embodiment, an oil return port 13 is provided on the valve body 1 , and the oil return port 13 is located in the middle of the valve body 1 .

[0028] As a preferred technical solution of this embodiment, the positions of the oil inlet 11 and the oil outlet 12 corresponding to each group of throttle valve assemblies 2 are interchangeable. The oil inlet 11 can be set to be located axially outside the oil outlet 12, or the oil inlet 11 can be set to be located axially inside the oil outlet 12.

[0029] The throttle valve assembly 2 is divided into two groups, which are symmetrically distributed in the valve body 1. The two groups of throttle valve assemblies 2 respectively control the on-off and opening between the two groups of oil inlets 11 and oil outlets 12. Take one group of throttle valve assemblies 2 as an example. Figure 3 As shown, the throttle valve assembly 2 includes a valve core 21, an elastic member 22, a valve sleeve 23 and a screw plug 24. The valve sleeve 23 is located on the inner side of the screw plug 24. The screw plug 24 is used to seal the opening at the end of the installation cavity 14. One end of the valve core 21 is slidably matched with the valve sleeve 23, and the other end of the valve core 21 slides along the screw plug 24. A conical surface 214 is formed on the outer surface of the valve core 21. Under the action of the elastic member 22, the conical surface 214 abuts against the valve sleeve 23, disconnecting the connection between the oil inlet 11 and the oil outlet 12.

[0030] As a preferred technical solution of this embodiment, the valve sleeve 23 is located at the inner periphery of one of the oil inlet 11 and the oil outlet 12, and a first oil port 231 is provided on the valve sleeve 23 to facilitate communication with the corresponding oil inlet 11 and one of the oil outlets 12; the screw plug 24 extends to the inner periphery of the other oil port of the oil inlet 11 and the oil outlet 12, and a second oil port 241 is provided on the screw plug 24 to facilitate communication with the other oil port of the oil outlet 12 and the oil inlet 11. When the oil inlet 11 is located axially outside the oil outlet 12, the valve sleeve 23 is located on the inner periphery of the oil outlet 12, the first oil port 231 on the valve sleeve 23 is communicated with the oil outlet 12, the screw plug 24 extends to the inner periphery of the oil inlet 11, and the second oil port 241 on the screw plug 24 is communicated with the oil inlet 11; when the oil inlet 11 is located axially inside the oil outlet 12, the valve sleeve 23 is located on the inner periphery of the oil inlet 11, the first oil port 231 on the valve sleeve 23 is communicated with the oil inlet 11, the screw plug 24 extends to the inner periphery of the oil outlet 12, and the second oil port 241 on the screw plug 24 is communicated with the oil outlet 12. In this embodiment, the oil inlet 11 is located axially outside the oil outlet 12, the valve sleeve 23 is located on the inner periphery of the oil outlet 12, the first oil port 231 is communicated with the oil outlet 12; the screw plug 24 extends to the inner periphery of the oil inlet 11, and the second oil port 241 is communicated with the oil inlet 11.

[0031] As a preferred technical solution of this embodiment, a first annular cavity is formed between the circumference of the valve core 21 and the valve sleeve 23, and the first annular cavity is communicated with the first oil port 231; a second annular cavity is formed between the circumference of the screw plug 24 and the valve core 21, and the second annular cavity is communicated with the second oil port 241. The conical surface 214 of the valve core 21 abuts against the end of the valve sleeve 23 close to the screw plug 24, blocking the communication between the first annular cavity and the second annular cavity, and further blocking the communication between the oil inlet 11 and the oil outlet 12.

[0032] As a preferred technical solution of this embodiment, the valve core 21 is in the shape of a rod with a changing outer diameter. The valve core 21 has a cylindrical first end 212 and a second end 213. The first end 212 of the valve core 21 slides with an end of the valve sleeve 23 away from the screw plug 24, and the second end 213 of the valve core 21 slides with an end of the screw plug 24 away from the valve sleeve 23. A conical surface 214 is formed on the middle outer surface of the valve core 21. Preferably, in order to prevent the pressure of the oil outlet 12 from pushing the valve core 21 away from the valve sleeve 23, the diameter D1 of the first end 212 of the valve core 21 is set to be equal to the diameter D3 of the abutment of the conical surface 214, so that the oil entering the first annular cavity has the same effective area and force in two axial directions, thereby preventing the pressure of the oil outlet 12 from pushing the valve core 21 away from the valve sleeve 23; in order to prevent the pressure of the oil inlet 11 from pressing the valve core 21 against the valve sleeve 23, the diameter D2 of the second end 213 of the valve core 21 is set to be equal to the diameter D3 of the abutment of the conical surface 214, so that the oil entering the second annular cavity has the same effective area and force in two axial directions, thereby preventing the pressure of the oil inlet 11 from pressing the valve core 21 against the valve sleeve 23.

[0033] As a preferred technical solution of this embodiment, a first cavity 25 is formed between the first end 212 of the valve core 21 and the driving member 3, and a second cavity 26 is formed between the second end 213 of the valve core 21 and the screw plug 24. In order to ensure the pressure balance of the two cavities, a through hole 211 is provided on the valve core 21 to connect the first cavity 25 and the second cavity 26. Preferably, the through hole 211 is an axially extending through hole.

[0034] As a preferred technical solution of this embodiment, one end of the elastic member 22 abuts against the screw plug 24, and the other end acts on the valve core 21. Preferably, the elastic member 22 can be sleeved on the valve core 21, a first sealing member 271 is provided between the screw plug 24 and the valve core 21, and is limited by the gasket 28, an annular protrusion 215 is formed on the outer peripheral surface of the valve core 21, one end of the elastic member 22 abuts against the gasket 28, and the other end of the elastic member 22 abuts against the annular protrusion 215, and in the initial state, the elastic member 22 is in a pre-compressed state. The elastic member 22 may be selected from but not limited to a spring.

[0035] As a preferred technical solution of this embodiment, in order to ensure the overall sealing, a second seal 272 is arranged between the valve sleeve 23 and the inner wall of the valve body 1, and the second seal 272 is located between the oil inlet 11 and the oil outlet 12; a third seal 273 is arranged between the screw plug 24 and the inner wall of the valve body 1.

[0036] like Figure 1-2As shown, the driving member 3 is used to push the valve core 21 of the throttle valve assembly 2 on both sides to control the opening. The driving member 3 is located between the two groups of throttle valve assemblies 2 and is coaxially arranged with the two groups of throttle valve assemblies 2. Both ends of the driving member 3 are slidably matched with the valve body 1, and the middle part of the driving member 3 is driven to perform axial reciprocating motion.

[0037] As the preferred technical solution of this embodiment, Figure 5 As shown, the driving member 3 is a rod-shaped structure, and both ends of the driving member 3 have circumferential surfaces 34 for easy sliding cooperation with the inner wall of the installation cavity 14 .

[0038] As the preferred technical solution of this embodiment, Figure 5 As shown, the size of the middle portion of the driving member 3 is reduced, and the outer diameter of the middle portion of the driving member 3 is smaller than that of the two ends. In this way, the outer periphery of the middle portion of the driving member 3 forms a cavity, which is convenient for maintaining communication with the oil return port 13.

[0039] As the preferred technical solution of this embodiment, Figure 5 As shown, teeth 32 are formed in the middle of the driving member 3 to facilitate the driving movement through tooth transmission.

[0040] As the preferred technical solution of this embodiment, Figure 5 As shown, a cut surface 33 is also formed in the middle of the driving member 3. Correspondingly, a planar protrusion can be provided on the inner wall of the valve body 1. The planar protrusion is clearance-matched with the cut surface 33. Once the driving member 3 is deflected at an angle, the planar protrusion can abut against the cut surface 33 to prevent it from rotating. In addition, a step surface is formed between the cut surface 33 and the outer peripheral surface of the middle of the driving member 3. The planar protrusion can also cooperate with the step surface to limit the motion range of the driving member 3.

[0041] As the preferred technical solution of this embodiment, Figure 5 As shown, flow grooves 31 are formed at both ends of the driving member 3, so that the first chamber 25 can be connected to the oil return port 13 through the flow grooves 31. The flow grooves 31 extend from the end face of the driving member 3 to the middle. Specifically, the flow grooves 31 include radial grooves 311 and axial grooves 312. The radial grooves 311 penetrate the end face of the driving member 3 in the radial direction of the driving member 3. The axial grooves 312 can be set to two, which are respectively connected to the two ends of the radial grooves 311 and extend parallel to the axial direction. The radial grooves 311 are set on the end face to ensure that when the driving member 3 is against the valve core 21, the oil in the first chamber 25 can still be connected to the oil return port 13 through the flow grooves 31.

[0042] As the preferred technical solution of this embodiment, Figure 5 As shown, the driving member 3 is a symmetrical structure.

[0043] like Figure 4As shown, the driving member 3 performs axial reciprocating motion under the drive of the driving device, and the driving device can drive the driving member 3 through the gear set 4. Specifically, the gear set 4 includes a first gear shaft 41 and a second gear shaft 44, a large gear 42 and a first small gear 43 are coaxially arranged on the first gear shaft 41, and a second small gear 45 is arranged on the second gear shaft 44. The first small gear 43 meshes with the teeth 32 on the driving member 3, and the second small gear 45 meshes with the large gear 42. The driving member 3 can be driven to perform axial reciprocating motion by externally driving the second gear shaft 44 and the second small gear 45 thereon. The transmission mode of small gear-large gear-small gear can realize fine control of the movement of the driving member 3.

[0044] As a preferred technical solution of this embodiment, the second gear shaft 44 can be driven manually, and the driving device can be set as a handle, which is used to connect the second gear shaft 44. The second gear shaft 44 can be driven to rotate by controlling the angle of the handle, and then transmitted to the driving member 3. In addition, the second gear shaft 44 can also be driven electrically, and the driving device can be set as a high-response motor. The high-response motor can be connected to the second gear shaft 44, and the axial movement position of the driving member 3 can be closed-loop controlled by the angle of motor rotation. The position of the driving member 3 can also be finely controlled by PWM pulse width modulation combined with sensor detection.

[0045] As a preferred technical solution of this embodiment, in addition to the gear transmission method, the axial movement of the driving member 3 can also be controlled by a screw nut driving method, a cam-connecting rod matching method, etc.

[0046] like Figure 6 As shown, this embodiment also provides a hydraulic system, including the aforementioned dual throttle valve control module, and also includes a hydraulic cylinder 5, the hydraulic cylinder 5 is connected to the dual throttle valve control module, and the dual throttle valve control module controls the lifting and lowering speed of the hydraulic cylinder 5.

[0047] The hydraulic cylinder 5 includes a piston 51 located in the cylinder body. The piston 51 divides the interior of the cylinder body into a rod chamber 52 and a rodless chamber 53. When oil enters the rodless chamber 53, the piston 51 is pushed up; when oil returns to the rodless chamber 53, the piston 51 descends.

[0048] The hydraulic cylinder 5 is connected to the oil port on the dual throttle valve control module. One set of throttle valve components 2 of the dual throttle valve control module controls the hydraulic cylinder 5 to be lifted, and the other set of throttle valve components 2 controls the hydraulic cylinder 5 to be lowered.

[0049] Specifically, for the purpose of distinction, the two groups of throttle valve assemblies 2 of the dual throttle valve control module are respectively the first group of throttle valve assemblies 2 and the second group of throttle valve assemblies 2. The oil inlet 11 corresponding to the first group of throttle valve assemblies 2 can be set to introduce pressure oil, and the corresponding oil outlet 12 is connected to the rodless chamber 53 of the hydraulic cylinder 5. The first group of throttle valve assemblies 2 control the oil inlet speed of the rodless chamber 53 of the hydraulic cylinder 5, thereby controlling the upward movement speed of the piston 51; the oil inlet 11 corresponding to the second group of throttle valve assemblies 2 is connected to the rodless chamber 53 of the hydraulic cylinder 5, and the corresponding oil outlet 12 is connected to the oil tank 7. The second group of throttle valve assemblies 2 control the oil return speed of the rodless chamber 53 of the hydraulic cylinder 5, thereby controlling the downward movement speed of the piston 51.

[0050] As a preferred technical solution of this embodiment, a one-way valve 6 is provided between the oil outlet 12 of the first throttle valve assembly 2 and the rodless chamber 53 to control the pressure oil to flow to the rodless chamber 53 in one direction without reverse flow.

[0051] As a preferred technical solution of this embodiment, the rod chamber 52 is connected to the oil tank 7. When the piston 51 moves upward, the rod chamber 52 discharges oil into the oil tank 7; when the piston 51 moves downward, the oil tank 7 can replenish oil to the rod chamber 52.

[0052] As a preferred technical solution of this embodiment, the oil return port 13 is connected to the oil tank 7, so that the first chamber 25, the second chamber 26 of the throttle valve assembly 2 and the flow groove 31 of the driving member 3 are all in a low pressure state.

[0053] Based on the above technical solution, the working principle of the hydraulic system of this embodiment is: like Figure 6 As shown, when the driving member 3 moves to the right to a certain position, the valve port of the first group of throttle valve components 2 is opened, and the pressure oil of the oil inlet 11 enters, and then opens the one-way valve 6 to enter the rodless chamber 53 of the hydraulic cylinder 5, and the piston 51 of the hydraulic cylinder 5 is lifted at a certain speed; when the driving force is cancelled, the driving member 3 returns to the neutral position, the valve port of the first group of throttle valve components 2 is closed, the pressure oil of the oil inlet 11 is blocked, and the one-way valve 6 is closed by the high-pressure oil of the rodless chamber 53 of the hydraulic cylinder 5; and the second group of throttle valve components 2 remains disconnected, so the piston 51 of the hydraulic cylinder 5 can maintain its height for a long time, and the piston 51 will not continue to drop under the action of gravity due to excessive leakage of oil in the rodless chamber 53.

[0054] When the driving member 3 moves to a certain position on the left, the valve port of the second throttle valve assembly 2 is opened, and the oil in the rodless chamber 53 of the hydraulic cylinder 5 enters from the oil inlet 11, and then returns to the oil tank 7 through the oil outlet 12, and the piston 51 of the hydraulic cylinder 5 descends at a certain speed. Usually, the hydraulic lifting system does not need to fully open both the lifting and lowering valve ports at the same time, so the control module is highly compatible with the hydraulic lifting system.

[0055] Each displacement of the driving member 3 corresponds to an opening of the two groups of throttle valve assemblies 2, so the lifting and lowering speeds of the piston 51 of the hydraulic cylinder 5 are respectively and continuously controllable. Generally speaking, the transmission mechanism of the control module can be driven manually or by a motor. If the handle is fixedly connected to the second gear shaft 44, the lifting and lowering speeds of the piston 51 of the hydraulic cylinder 5 can be proportionally controlled by the angle of the handle; if a high-response motor is fixedly connected to the second gear shaft 44, not only can the valve opening be calculated by the angle of motor rotation, thereby performing closed-loop control of the lifting and lowering speeds of the piston 51 of the hydraulic cylinder 5, but also a specific opening time (such as PWM pulse width modulation) can be set for the two throttle valve assemblies 2 within a shorter period, and the motion state of the piston 51 can be finely controlled in combination with position, speed, and force sensors.

[0056] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A dual throttle valve control module, characterized in that: include: A valve body (1), wherein the valve body (1) is provided with a plurality of oil ports; A throttle valve assembly (2), the throttle valve assembly (2) comprising two groups, symmetrically arranged in the valve body (1), the throttle valve assembly (2) comprising a valve core (21), the valve core (21) abutting against each other under the action of an elastic member (22) to block the communication between the oil ports; A driving member (3), the driving member (3) being located between the two groups of throttle valve assemblies (2), with gaps being left between the two ends of the driving member (3) and the two valve cores (21), and the driving member (3) pushing the single-side valve core (21) to open so as to control the opening degree.

2. A dual throttle valve control module according to claim 1, characterized in that: A through hole (211) communicating the two ends is formed in the valve core (21), a flow groove (31) is formed on the driving member (3), and a cavity between the valve core (21) and the driving member (3) is connected to the oil return port (13) via the flow groove (31).

3. A dual throttle valve control module according to claim 2, characterized in that: The middle portion of the driving member (3) is reduced in size and connected to the oil return port (13). The two ends of the driving member (3) form the flow groove (31), and the flow groove (31) extends from the end surface of the driving member (3) to the middle portion of the driving member (3).

4. A dual throttle valve control module according to claim 3, characterized in that: The flow groove (31) comprises a radial groove (311) located on the end surface of the driving member (3) and an axial groove (312) located on the outer peripheral surface of the driving member (3).

5. A dual throttle valve control module according to any one of claims 1 to 4, characterized in that: The driving member (3) performs axial reciprocating motion under the drive of the driving device, a tooth (32) is formed in the middle of the driving member (3), and the driving device drives the driving member (3) via a gear set (4).

6. A dual throttle valve control module according to claim 5, characterized in that: The gear set (4) comprises a first gear shaft (41) and a second gear shaft (44); a large gear (42) and a first small gear (43) are coaxially arranged on the first gear shaft (41); a second small gear (45) is arranged on the second gear shaft (44); the first small gear (43) is meshed with the driving member (3); the large gear (42) is meshed with the second small gear (45); and the second small gear (45) is driven externally.

7. The dual throttle valve control module according to claim 1, characterized in that: The throttle valve assembly (2) further comprises a valve sleeve (23) and a screw plug (24), wherein the valve sleeve (23) and the screw plug (24) are arranged in the valve body (1); an end of the valve core (21) close to the driving member (3) is slidably engaged with the valve sleeve (23); the other end of the valve core (21) slides along the screw plug (24); and a conical surface (214) is formed on the outer surface of the valve core (21) and abuts against the valve sleeve (23).

8. A dual throttle valve control module according to claim 1 or 7, characterized in that: The outer diameters at both ends of the valve core (21) and the corresponding diameters at the position where the valve core (21) abuts are all equal.

9. A hydraulic system, characterized in that: include: Hydraulic cylinder (5); The dual throttle valve control module according to any one of claims 1 to 8, wherein one group of the throttle valve assemblies (2) controls the lifting of the hydraulic cylinder (5), and the other group of the throttle valve assemblies (2) controls the lowering of the hydraulic cylinder (5).

10. A hydraulic system according to claim 9, characterized in that: The valve body (1) is provided with an oil inlet (11) and an oil outlet (12) for each throttle valve assembly (2); one of the oil inlets (11) introduces pressure oil, and the corresponding oil outlet (12) is unidirectionally connected to the rodless chamber (53) of the hydraulic cylinder (5); the other oil inlet (11) is connected to the rodless chamber (53) of the hydraulic cylinder (5), and the corresponding oil outlet (12) is connected to the oil tank (7).

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