Parallel multi-way directional valve and valve unit

Abstract

The parallel multi-way directional valve comprises at least two parallel valve units, each of which comprises a valve body, a valve core, a driving mechanism, an oil inlet channel and an oil return channel. The valve body is integrally formed by casting, and a valve cavity extending along a first axis is arranged in the valve body. The valve cavity is in communication with at least two working oil ports formed in the valve body. One pair of opposite sides of the valve body are mounting surfaces. The valve core is movably arranged in the valve cavity. The driving mechanism is used to drive the valve core to reciprocate relative to the valve cavity to select the communication of the corresponding working oil port. The oil inlet channel penetrates through the mounting surfaces of the opposite sides of the valve body and is in communication with the valve cavity. The oil return channel penetrates through the mounting surfaces of the opposite sides of the valve body and is in communication with the valve cavity. Adjacent two valve units are connected through the mounting surfaces of the valve bodies, and the oil inlet channel of one valve unit is in communication with the oil inlet channel of the other valve unit, and the oil return channel is in communication with the oil return channel of the other valve unit.

Description

Technical Field

[0001] This disclosure relates to the field of hydraulic equipment, and more specifically, to a parallel multi-way directional valve and valve unit. Background Technology

[0002] A multi-way directional valve is an integrated hydraulic control component primarily used in drilling rigs, cranes, aerial work platforms, construction machinery, and agricultural machinery. It centrally controls the actions of multiple hydraulic cylinders or motors to coordinate complex work processes. Its core function is to switch the direction of the hydraulic circuit by displacing the valve core, thereby changing the flow direction and volume of the hydraulic oil, driving the actuators to perform actions such as forward, backward, stop, or speed adjustment.

[0003] In the existing technology, when multiple directional valves in series control multiple actuators respectively, if the front-end directional valve cuts off the oil circuit, the subsequent actuators will not be able to work properly, which cannot meet the independent working requirements of multiple actuators. In addition, there is a risk of oil leakage between valve blocks in the valve body, the external pipeline connection of the valve body is complicated, the risk of hydraulic oil leakage is high, and the installation and maintenance are difficult. Utility Model Content

[0004] This disclosure provides a parallel multi-way directional valve and valve unit to address the problems existing in the prior art.

[0005] According to a first aspect of this disclosure, a parallel multi-way directional valve is provided, comprising at least two valve units connected in parallel, wherein each valve unit includes:

[0006] The valve body is integrally cast and has a valve cavity extending along a first axis. The valve cavity is configured to communicate with at least two working oil ports opened on the valve body. One pair of opposite sides of the valve body is configured as mounting surfaces.

[0007] A valve core, the valve core being configured to extend along a first axis, the valve core being movably disposed within the valve cavity;

[0008] A drive mechanism configured to drive the valve core to reciprocate relative to the valve cavity along the direction of the first axis to select and connect the corresponding working port;

[0009] An oil inlet channel is configured to penetrate mounting surfaces on opposite sides of the valve body and communicate with the valve cavity;

[0010] The oil return channel is configured to penetrate the mounting surfaces on opposite sides of the valve body and communicate with the valve cavity;

[0011] In this configuration, two adjacent valve units are connected via the mounting surface of the valve body, and the oil inlet channel of one valve unit is connected to the oil inlet channel of the other valve unit, and the oil return channel is connected to the oil return channel of the other valve unit.

[0012] In one embodiment of this disclosure, a first channel and a second channel are provided in the valve body, the first channel and the second channel are configured to connect the valve cavity and the corresponding working oil port respectively; the first channel and the second channel are configured to be formed with the valve cavity during the valve body casting process.

[0013] In one embodiment of this disclosure, an X-axis, a Y-axis, and a Z-axis are defined in a three-axis coordinate system. The first axis extends along the direction of the X-axis, the oil return channel and the oil inlet channel extend along the direction of the Y-axis, and the first channel and the second channel extend along the direction of the Z-axis.

[0014] In one embodiment of this disclosure, the valve body is further provided with a mounting hole that penetrates the mounting surface, and the valve units are connected by mounting screws.

[0015] In one embodiment of this disclosure, the mounting holes are distributed on opposite sides of the valve cavity, and the mounting holes extend along the Y-axis.

[0016] In one embodiment of this disclosure, the return oil passage is configured as at least two, and the at least two return oil passages are configured to be located on opposite sides of the valve body.

[0017] In one embodiment of this disclosure, the working port includes a first working port and a second working port. When the valve core moves to the first position, the passage between the oil inlet channel and the first working port is opened, and the passage between the oil return channel and the second working port is opened.

[0018] In one embodiment of this disclosure, when the valve core moves to the second position, the passage between the oil inlet channel and the second working oil port is opened, and the passage between the oil return channel and the first working oil port is opened.

[0019] In one embodiment of this disclosure, a reset mechanism is further included, one end of which abuts against the valve core and the other end of which abuts against the driving device, wherein the driving mechanism is an electromagnet.

[0020] In one embodiment of this disclosure, when the electromagnet is de-energized, the valve core moves to the third position under the reset force of the reset mechanism, and the working oil port is disconnected from the oil inlet channel and the oil return channel.

[0021] According to a second aspect of this disclosure, a valve unit is provided, comprising:

[0022] The valve body is integrally cast and has a valve cavity extending along a first axis. The valve cavity is configured to communicate with at least two working oil ports opened on the valve body. One pair of opposite sides of the valve body is configured as mounting surfaces.

[0023] A valve core, the valve core being configured to extend along a first axis, the valve core being movably disposed within the valve cavity;

[0024] A drive mechanism configured to drive the valve core to reciprocate relative to the valve cavity along the direction of the first axis to select and connect the corresponding working port;

[0025] An oil inlet channel is configured to penetrate mounting surfaces on opposite sides of the valve body and communicate with the valve cavity;

[0026] The oil return channel is configured to extend through the mounting surfaces on opposite sides of the valve body and communicate with the valve cavity.

[0027] One beneficial effect of this disclosure is that by connecting the inlet and return oil channels of adjacent valve units, multiple individual valve units can be connected in parallel within a multi-way directional valve. Each valve unit shares the same inlet and return oil channels. Even if the oil circuit between the upstream valve unit and the external actuator is cut off, the normal operation of the downstream valve unit will not be affected, thus allowing each valve unit to operate independently. Furthermore, the parallel connection of valve units reduces external piping connections, lowering the difficulty of installation and maintenance. In addition, the valve body of the valve unit provided in this disclosure is integrally cast, eliminating the need for multiple valve blocks within the valve body, reducing the risk of hydraulic oil leakage within the valve unit, and further simplifying installation and maintenance.

[0028] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the present disclosure and, together with their description, serve to explain the principles of the present disclosure.

[0030] Figure 1 This is a cross-sectional schematic diagram of the valve unit disclosed in this paper;

[0031] Figure 2 This is a schematic diagram of the multi-way directional valve disclosed in this paper;

[0032] Figure 3 This is a schematic diagram of the valve unit disclosed in this publication.

[0033] Figures 1 to 3The one-to-one correspondence between the component names and the reference numerals in the figures is as follows:

[0034] 1. Valve body; 10. Valve chamber; 11. First working oil port; 12. Second working oil port; 13. Oil inlet channel; 14. Oil return channel; 15. First channel; 16. Second channel; 2. Valve core; 3. Drive mechanism; 4. Mounting hole; 5. Reset mechanism; 6. Valve unit; 7. Multi-way directional valve. Detailed Implementation

[0035] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0036] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0037] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0039] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0040] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0041] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0042] The multi-way directional valve used in hydraulic systems is a core control valve used to centrally control the direction of movement of multiple actuators. It is composed of multiple directional valve units, which change the direction of oil flow by manipulating the displacement of the valve core, thereby achieving control of different actuators.

[0043] Currently, existing multi-way directional valves have the problem that when multiple directional valves in series control multiple actuators, if the front-end directional valve cuts off the oil circuit, the subsequent actuators will not be able to work properly. They cannot meet the needs of multiple actuators working independently. In addition, the external pipeline connection is complicated, the valve body is composed of multiple independent valve blocks connected by bolts or flanges, the risk of hydraulic oil leakage is high, and the installation and maintenance are difficult.

[0044] To address the aforementioned issues, this disclosure provides a parallel multi-way directional valve, comprising at least two valve units connected in parallel, wherein each valve unit includes a valve body, a valve core, a drive mechanism, and a reset mechanism.

[0045] The valve body has at least two working ports and a valve chamber. The valve chamber is configured to communicate with at least two working ports; specifically, each working port is connected to the valve chamber. The valve chamber extends along a first axis, and the valve core is configured to extend along the first axis and is movably disposed within the valve chamber. Driven by a drive mechanism, the valve core can reciprocate relative to the valve chamber along the first axis to selectively connect to the corresponding working port. Specifically, the reciprocating motion of the valve core can change the connection state of the hydraulic oil circuit inside the valve body, thereby selecting and connecting to the corresponding working port to achieve switching of the hydraulic oil flow direction.

[0046] The valve body is cast in one piece and contains an oil inlet channel and an oil return channel. A pair of opposite sides of the valve body serve as mounting surfaces. The oil inlet channel penetrates both mounting surfaces and communicates with the valve cavity; similarly, the oil return channel also penetrates both mounting surfaces and communicates with the valve cavity. Adjacent valve units are interconnected via the mounting surfaces of the valve body, allowing the oil inlet channel of one valve unit to communicate with the oil inlet channel of the other, and the oil return channel to communicate with the oil return channel of the other.

[0047] Hydraulic oil flows into the inlet of the parallel multi-way directional valve. Because the valve units are connected in parallel and share a common inlet channel, the hydraulic oil flows into the inlet channels of all valve units simultaneously. Then, depending on the position of the valve core, it flows out of the parallel multi-way directional valve through different working ports and into the external actuator. After execution, the hydraulic oil flows back from the external actuator to the parallel multi-way directional valve. Since the return channels of all valve units are also shared, the return oil from all valve units eventually merges into the return channel and returns to the oil tank.

[0048] The parallel multi-way directional control valve disclosed herein connects the inlet and return oil channels of two adjacent valve units, thereby enabling multiple individual valve units to be connected in parallel within a single multi-way directional control valve. Each valve unit shares the inlet and return oil channels, ensuring that even if the oil circuit between the upstream valve unit and the external actuator is cut off, the normal operation of the downstream valve unit will not be affected, allowing each valve unit to operate independently. Furthermore, the parallel connection of valve units reduces external piping connections, lowering the difficulty of installation and maintenance. In addition, the valve body of the valve unit disclosed herein is integrally cast, eliminating the need for multiple valve blocks within the valve body, reducing the risk of hydraulic oil leakage within the valve unit, and further simplifying installation and maintenance.

[0049] The specific embodiments of this disclosure are described below with reference to the accompanying drawings.

[0050] This disclosure provides a parallel multi-way directional valve, such as Figures 1 to 3 As shown, it includes at least two valve units 6 connected in parallel, wherein each valve unit 6 includes a valve body 1, a valve core 2, a drive mechanism 3 and a reset mechanism 5.

[0051] For ease of description later, such as Figure 1 and Figure 3 As shown, the X-axis, Y-axis, and Z-axis in the three-axis coordinate system are defined, and the X-axis, Y-axis, and Z-axis are mutually perpendicular in space. In a specific embodiment of this disclosure, the valve body 1 can be constructed as a cuboid configuration. In this embodiment, as shown... Figure 3 As shown, the length, width, and height of valve body 1 are defined as extending along the X-axis, Y-axis, and Z-axis directions, respectively.

[0052] A valve body 1 has a valve cavity 10 extending along a first axis. A valve core 2 is movably disposed within the valve cavity 10. The valve core 2 extends along the direction of the first axis, which is the X-axis, meaning both the valve cavity 10 and the valve core 2 extend along the X-axis. A drive mechanism 3 is configured to drive the valve core 2 to reciprocate relative to the valve cavity 10 along the direction of the first axis (i.e., the X-axis). Specifically, the drive mechanism 3 can be manually driven or electromagnetically driven.

[0053] The valve body 1 has at least two working ports, and the valve cavity 10 is configured to communicate with the at least two working ports on the valve body 1. In one embodiment of this disclosure, there may be two working ports, including a first working port 11 and a second working port 12, which are respectively connected to the valve cavity 10. The valve core 2 can reciprocate along the X-axis within the valve cavity 10 under the drive of the drive mechanism 3 to selectively connect to the corresponding working port. Specifically, the reciprocating motion of the valve core 2 can change the connection state of the hydraulic oil circuit inside the valve body 1, thereby selecting to connect to either the first working port 11 or the second working port 12 to achieve the switching of the hydraulic oil flow direction.

[0054] In one embodiment of this disclosure, the valve body 1 is provided with a first channel 15 and a second channel 16 communicating with the valve cavity 10, such as... Figure 1 As shown, the first channel 15 and the second channel 16 extend along the Z-axis and are configured to connect the valve chamber 10 to the corresponding working port, respectively. Specifically, one end of the first channel 15 is connected to the valve chamber 10, and the other end is connected to the first working port 11; one end of the second channel 16 is connected to the valve chamber 10, and the other end is connected to the second working port 12. After the hydraulic oil flows into the valve chamber 10, it will selectively open one of the first channel 15 and the second channel 16 according to the position of the valve core 2. The oil then flows out of the parallel multi-way directional valve 7 through the opened channel and into the external actuator.

[0055] This disclosure arranges the extension directions (i.e., the Z-axis direction) of the first channel 15 and the second channel 16 perpendicular to the extension direction (i.e., the X-axis direction) of the valve cavity 10. This orthogonal design decouples the oil path from the movement direction of the valve core 2, ensuring that the flow of hydraulic oil does not directly affect the action of the valve core 2, resulting in more stable reversing control. This axially separated layout facilitates the casting or machining of the valve body 1, simplifies the manufacturing process, and is conducive to the modular design of the valve body 1, allowing for easy adjustment of the flow channel configuration according to different working conditions.

[0056] Furthermore, a pair of oppositely arranged sides of the valve body 1 serve as mounting surfaces for the valve body 1, and an oil inlet channel 13 and an oil return channel 14 are provided on the valve body 1. The oil inlet channel 13 penetrates the mounting surfaces on opposite sides of the valve body 1 and communicates with the valve cavity 10; the oil return channel 14 penetrates the mounting surfaces on opposite sides of the valve body 1 and communicates with the valve cavity 10. Specifically, the oil inlet channel 13 and the oil return channel 14 extend along the Y-axis direction, thereby penetrating a pair of oppositely arranged mounting surfaces of the valve body 1 in the Y-axis direction.

[0057] Adjacent valve units 6 are interconnected via the mounting surface of the valve body 1, with the oil inlet channel 13 of one valve unit 6 connected to the oil inlet channel 13 of the other valve unit 6, and the oil return channel 14 connected to the oil return channel 14 of the other valve unit 6. The valve units 6 are connected in parallel and are detachable; the number of valve units 6 can be increased or decreased as needed. Figure 2 As shown, multiple valve units 6 can be connected to each other in sequence to form a parallel multi-way directional valve 7.

[0058] Hydraulic oil flows into the inlet channel 13 of the parallel multi-way directional valve 7. Since the valve units 6 are connected in parallel and share the same inlet channel 13, the hydraulic oil flows into the inlet channels 13 of all valve units 6 simultaneously. Then, depending on the position of the valve core 2, it flows out of the parallel multi-way directional valve 7 through different working ports and into the external actuator. After the operation is completed, the hydraulic oil flows back from the external actuator to the parallel multi-way directional valve 7. Since the return channels 14 of the valve units 6 are also shared, all the hydraulic oil returns eventually converge in the return channel 14 and return to the oil tank.

[0059] The parallel multi-way directional valve 7 disclosed herein connects the inlet channels 13 and return channels 14 of two adjacent valve units 6, thereby enabling multiple individual valve units 6 to be connected in parallel within a single multi-way directional valve 7. Each valve unit 6 shares the inlet channel 13 and return channel 14. The operation of the upstream valve unit 6 does not affect the oil supply pressure and flow rate of the downstream valve unit 6, thus allowing each valve unit 6 to operate independently. Furthermore, the parallel connection of the valve units 6 reduces external piping connections and simplifies installation and maintenance.

[0060] In one embodiment of this disclosure, such as Figure 1 and Figure 3 As shown, at least two return oil channels 14 are constructed, and these two return oil channels 14 are located on opposite sides of the valve body 1. Specifically, the two return oil channels 14 can be located on the same side of the valve chamber 10 as the first channel 15 and the second channel 16. Depending on the actual operating conditions, when the system flow rate is low, only one side of the return oil channel 14 can be activated, and the other side can be closed with a plug. If a dual return oil channel 14 configuration is adopted, the oil flowing from the actuator back to the parallel multi-way directional valve 7 will preferentially flow to the return oil channel 14 with lower pressure. If both return oil channels 14 are activated and hydraulic oil flows through both, the hydraulic oil from both return oil channels 14 will flow into the same return oil tank. This design ensures that unnecessary oil circuit branches are reduced under low flow conditions, and provides redundant return oil capacity under high flow demand, giving the system better adaptability to operating conditions.

[0061] The valve body 1 of this disclosure is integrally cast, thus eliminating the need for multiple valve blocks within the valve body 1, reducing the risk of hydraulic oil leakage inside the valve unit 6, and lowering the difficulty of installation and maintenance. Furthermore, in one embodiment of this disclosure, as... Figure 1 As shown, during the casting stage of valve body 1, the first channel 15 and the second channel 16 are configured to be formed with the valve cavity 10 during the casting of valve body 1. Since the first channel 15 and the second channel 16 are directly cast with the valve cavity 10, the additional assembly steps caused by drilling, welding or threaded connection in traditional processing methods are avoided. This not only simplifies the production process but also reduces potential leakage points and improves the sealing reliability and service life of valve body 1.

[0062] In one embodiment of this disclosure, reference is made to Figure 1 and Figure 3 The valve body 1 also has mounting holes 4 that penetrate the mounting surface. Valve units 6 are connected by mounting screws. When it is necessary to connect individual valve units 6, mounting screws can be passed through the mounting holes 4 of each valve unit 6, thus connecting adjacent valve units 6 together through the mounting surface. The mounting holes 4 penetrate the mounting surface of the valve body 1, thus optimizing the internal space utilization of the parallel multi-way directional valve 7. This is particularly suitable for hydraulic systems with multi-valve integration or limited space, and also facilitates connection with external pipelines or actuators, improving the overall system installation efficiency.

[0063] In one specific embodiment of this disclosure, such as Figure 1 and Figure 3 As shown, mounting holes 4 are distributed on opposite sides of the valve cavity 10, and the mounting holes 4 extend along the Y-axis. Specifically, as... Figure 1 As shown, each valve unit 6 can be provided with three mounting holes 4, for reference. Figure 1 In the view, two of the mounting holes 4 are located on the upper side of valve cavity 10, and the other is located on the lower side of valve cavity 10. From the XZ plane perspective, the three mounting holes 4 are distributed in an inverted triangular shape. This arrangement of mounting holes 4 in three directions on the valve body 1 ensures uniform stress on each valve unit 6 after installation, reducing the impact of external vibrations on the parallel multi-way directional valve 7. It also reduces the risk of valve body 1 deformation or sealing failure between valve units 6 due to uneven distribution of loads (such as force, pressure, torque, etc.) on the structure or components, resulting in a significantly greater load on one side or part compared to other parts.

[0064] In one embodiment of this disclosure, such as Figure 1As shown, when the valve core 2 moves to the first position, the channel between the oil inlet channel 13 and the first working port 11 is connected, and the channel between the oil return channel 14 and the second working port 12 is connected. When the valve core 2 moves to the second position, the channel between the oil inlet channel 13 and the second working port 12 is connected, and the channel between the oil return channel 14 and the first working port 11 is connected. The design of the motion control oil circuit of the valve core 2 enables precise oil circuit switching, thereby ensuring that the hydraulic actuator moves stably in a predetermined direction, improving the system response accuracy and operational reliability.

[0065] Specifically, when the drive mechanism 3 drives the valve core 2 to the first position, the hydraulic oil flow direction inside the entire valve unit 6 is: inlet channel 13 → first working port 11 → second working port 12 → return channel 14. The hydraulic oil flows into the valve unit 6 from the inlet channel 13, flows out of the valve unit 6 through the first working port 11, flows into the external actuator, then flows into the valve unit 6 from the external actuator through the second working port 12, and then flows out of the valve unit 6 through the return channel 14, flowing to other valve units 6 adjacent to the valve unit 6.

[0066] When the drive mechanism 3 drives the valve core 2 to the second position, the hydraulic oil flow direction inside the entire valve unit 6 is: inlet channel 13 → second working port 12 → first working port 11 → return channel 14. The hydraulic oil flows into the valve unit 6 from the inlet channel 13, flows out of the valve unit 6 through the second working port 12, flows into the external actuator, then flows into the valve unit 6 from the external actuator through the first working port 11, and then flows out of the valve unit 6 through the return channel 14, flowing to other valve units 6 adjacent to the valve unit 6.

[0067] In one embodiment of this disclosure, such as Figure 1 As shown, the parallel multi-way directional valve 7 may include a reset mechanism 5. The reset mechanism 5 can provide a reset function for the valve core 2 when the drive mechanism 3 is de-energized or otherwise not driven. One end of the reset mechanism 5 abuts against the valve core 2, and the other end abuts against the drive mechanism 3, which is an electromagnet. The reset mechanism 5 can be a reset spring or a hydraulic accumulator; this disclosure does not limit the type of reset mechanism 5.

[0068] Specifically, the reset mechanism 5 is located at both ends of the valve core 2. The reset mechanism 5 includes a spring and a washer. One end of the washer abuts against the spring, and the other end abuts against one end of the valve core 2. The reset mechanism 5 establishes a stable mechanical connection between the valve core 2 and the drive mechanism 3 driven by the electromagnet, ensuring that the valve core 2 can be quickly and reliably reset when the electromagnet switches states, thereby improving the response speed of the valve body 1.

[0069] In one embodiment of this disclosure, such as Figure 1As shown, when the electromagnet is de-energized, the valve core 2 moves to the third position under the reset force of the reset mechanism 5, disconnecting the working oil port from the inlet channel 13 and the return channel 14. As mentioned earlier, the reset mechanism 5 includes a reset spring, which can be two springs, respectively disposed on both sides of the valve core 2. There can also be two electromagnets, respectively disposed on both sides of the valve core 2. When one electromagnet is energized, the valve core 2 moves away from the energized electromagnet, compressing the reset spring on the side away from the energized electromagnet and storing elastic potential energy. When both electromagnets are de-energized, the reset spring releases the stored elastic potential energy, and the valve core 2 moves to the third position within the valve cavity 10 under the reset force provided by the reset mechanism 5. The third position can be the neutral position of the directional valve. At this time, the working oil port is not connected to the inlet channel 13 and the return channel 14, achieving the neutral position cutoff function of the hydraulic system and stopping the hydraulic actuator.

[0070] It should be noted that the neutral position of the directional valve in this embodiment is a conventional method in the art. In this embodiment, any valve core in the prior art can be used to control the neutral position of the directional valve. This application will not provide a detailed description of the neutral position of the directional valve.

[0071] The design of the reset mechanism 5 ensures the safety of the system when power is off, prevents the actuator from accidentally operating due to oil circuit connection, avoids equipment damage or personal injury, and the quick reset of the valve core 2 to the neutral disconnected state helps to reduce hydraulic shock, protect pipelines and components, and extend service life.

[0072] According to a second aspect of this disclosure, a valve unit 6 is also provided, comprising: a valve body 1, a valve core 2, a drive mechanism 3, an oil inlet channel 13, and an oil return channel 14, wherein the valve body 1 is integrally cast, and a valve cavity 10 extending along a first axis is provided within the valve body 1, the valve cavity 10 being configured to communicate with at least two working oil ports opened on the valve body 1; one pair of oppositely disposed sides of the valve body 1 are configured as mounting surfaces; the valve core 2 is configured to extend along the first axis and is movably disposed within the valve cavity 10; the drive mechanism 3 is configured to drive the valve core 2 to reciprocate relative to the valve cavity 10 along the direction of the first axis to selectively communicate with the corresponding working oil port; the oil inlet channel 13 is configured to penetrate the mounting surfaces on opposite sides of the valve body 1 and communicate with the valve cavity 10; the oil return channel 14 is configured to penetrate the mounting surfaces on opposite sides of the valve body 1 and communicate with the valve cavity 10.

[0073] It should be noted that valve unit 6 can be applied to the parallel multi-way directional valve 7 described above, or it can work independently and be connected to an actuator to achieve oil circuit switching. The structure and working principle of valve unit 6 provided in this disclosure are completely consistent with valve unit 6 in the parallel multi-way directional valve 7 provided in the first aspect of this disclosure, and will not be described again here.

[0074] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. A parallel multi-way directional valve, characterized in that, It includes at least two valve units (6) connected in parallel, wherein each valve unit (6) includes: The valve body (1) is integrally cast and has a valve cavity (10) extending along a first axis inside. The valve cavity (10) is configured to communicate with at least two working oil ports opened on the valve body (1). One pair of oppositely arranged sides of the valve body (1) are configured as mounting surfaces. Valve core (2), the valve core (2) is configured to extend along a first axis, the valve core (2) is movably disposed within the valve cavity (10); A drive mechanism (3) is configured to drive the valve core (2) to reciprocate relative to the valve chamber (10) along the direction of the first axis to select and connect the corresponding working port; Oil inlet channel (13), the oil inlet channel (13) is configured to penetrate the mounting surfaces on opposite sides of the valve body (1) and communicate with the valve cavity (10); Oil return channel (14), the oil return channel (14) is configured to penetrate the mounting surfaces on opposite sides of the valve body (1) and communicate with the valve cavity (10); Among them, two adjacent valve units (6) are configured to be connected through the mounting surface of the valve body (1), and the oil inlet channel (13) of one valve unit (6) is connected to the oil inlet channel (13) of the other valve unit (6), and the oil return channel (14) is connected to the oil return channel (14) of the other valve unit (6).

2. The parallel multi-way directional valve according to claim 1, characterized in that, The valve body (1) has a first channel (15) and a second channel (16) inside. The first channel (15) and the second channel (16) are configured to connect the valve cavity (10) and the corresponding working oil port respectively. The first channel (15) and the second channel (16) are configured to be formed with the valve cavity (10) during the casting of the valve body (1).

3. The parallel multi-way directional valve according to claim 2, characterized in that, Define the X-axis, Y-axis and Z-axis in the three-axis coordinate system. The first axis extends along the X-axis direction, the return oil channel (14) and the inlet oil channel (13) extend along the Y-axis direction, and the first channel (15) and the second channel (16) extend along the Z-axis direction.

4. The parallel multi-way directional valve according to claim 3, characterized in that, The valve body (1) is also provided with a mounting hole (4), which penetrates the mounting surface, and the valve units (6) are connected by mounting screws.

5. The parallel multi-way directional valve according to claim 4, characterized in that, The mounting holes (4) are distributed on opposite sides of the valve chamber (10), and the mounting holes (4) extend along the Y-axis.

6. The parallel multi-way directional valve according to claim 1, characterized in that, The return oil passage (14) is configured as at least two, and the at least two return oil passages (14) are configured to be located on opposite sides of the valve body (1).

7. The parallel multi-way directional valve according to claim 1, characterized in that, The working oil port includes a first working oil port (11) and a second working oil port (12). When the valve core (2) moves to the first position, the passage between the oil inlet channel (13) and the first working oil port (11) is opened, and the passage between the oil return channel (14) and the second working oil port (12) is opened.

8. The parallel multi-way directional valve according to claim 7, characterized in that, When the valve core (2) moves to the second position, the passage between the oil inlet channel (13) and the second working oil port (12) is opened, and the passage between the oil return channel (14) and the first working oil port (11) is opened.

9. The parallel multi-way directional valve according to claim 1, characterized in that, It also includes a reset mechanism (5), one end of which abuts against the valve core (2) and the other end of which abuts against the drive mechanism (3), the drive mechanism (3) being an electromagnet.

10. The parallel multi-way directional valve according to claim 9, characterized in that, When the electromagnet is de-energized, the valve core (2) moves to the third position under the reset force of the reset mechanism (5), and the working oil port is disconnected from the oil inlet channel (13) and the oil return channel (14).

11. A valve unit, characterized in that, include: The valve body (1) is integrally cast and has a valve cavity (10) extending along a first axis inside. The valve cavity (10) is configured to communicate with at least two working oil ports opened on the valve body (1). One pair of oppositely arranged sides of the valve body (1) are configured as mounting surfaces. Valve core (2), the valve core (2) is configured to extend along a first axis, the valve core (2) is movably disposed within the valve cavity (10); A drive mechanism (3) is configured to drive the valve core (2) to reciprocate relative to the valve chamber (10) along the direction of the first axis to select and connect the corresponding working port; Oil inlet channel (13), the oil inlet channel (13) is configured to penetrate the mounting surfaces on opposite sides of the valve body (1) and communicate with the valve cavity (10); The oil return channel (14) is configured to penetrate the mounting surfaces on opposite sides of the valve body (1) and communicate with the valve cavity (10).

Images