Hydraulic reversing valve and hydraulic system

Abstract

The utility model discloses a hydraulic reversing valve and a hydraulic system. The hydraulic reversing valve comprises a driving assembly, a valve body assembly and a valve element assembly. The driving assembly comprises a cam, and the cam rotates in the first direction. The valve body assembly comprises a valve body, and the valve body is provided with a containing cavity, a first connecting channel, a second connecting channel, an oil inlet channel and an oil return channel. The valve element assembly comprises a valve element and a reset piece which penetrate through the containing cavity, the two ends of the valve element in the second direction are connected with the cam and the reset piece correspondingly, the end, away from the valve element in the second direction, of the reset piece is connected with the valve body, and the cam is used for driving the valve element to move relative to the valve body in the second direction. And the reset piece is used for applying thrust to the valve element, and the thrust moves towards the cam in the second direction so that the oil inlet channel can be communicated with one of the first connecting channel and the second connecting channel, and the oil return channel can be communicated with the other one of the first connecting channel and the second connecting channel. The hydraulic reversing valve can have a small structural size.

Description

Technical Field

[0001] This application relates to the field of hydraulic valve technology, and more particularly to a hydraulic directional valve and a hydraulic system. Background Technology

[0002] A hydraulic directional valve is a hydraulic control element that uses the movement of the valve core within the valve body to open, close, or change the direction of oil flow, thereby controlling the start, stop, or change the direction of movement of hydraulic actuators. Traditional hydraulic directional valves have electromagnetic devices installed on both sides of the valve core, which use electromagnetic attraction to make the valve core actuate. As a result, hydraulic directional valves are too large, which limits their use in some equipment with limited space and narrows their applicable range. Utility Model Content

[0003] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide a hydraulic directional valve that has a smaller structural size.

[0004] This application also provides a hydraulic system.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] According to a first aspect embodiment of the present application, a hydraulic directional valve is provided with a first direction and a second direction, the first direction intersecting the second direction. The hydraulic directional valve includes: a drive assembly including a cam, the cam rotating about the first direction; a valve body assembly including a valve body, the valve body and the cam being spaced apart along the second direction, the valve body having a receiving cavity, a first connecting channel, a second connecting channel, an oil inlet channel, and a return oil channel, the receiving cavity extending along the second direction, the first connecting channel, the oil inlet channel, the second connecting channel, and the return oil channel being arranged sequentially at intervals along the second direction and all communicating with the receiving cavity, the first connecting channel and the... The second connection channel is connected; the valve core assembly includes a valve core and a reset member, both of which are disposed in the receiving cavity. The two ends of the valve core along the second direction are respectively connected to the cam and the reset member. The end of the reset member along the second direction away from the valve core is connected to the valve body. The cam is used to drive the valve core to move relative to the valve body along the second direction, so that the oil inlet channel and the first connection channel are connected to one of the second connection channels, and the oil return channel and the first connection channel are connected to the other of the second connection channels. The reset member is used to apply a thrust to the valve core that moves towards the cam along the second direction.

[0007] The hydraulic directional valve of this application has the following advantages:

[0008] In this application, since the cam rotates around a first direction and the valve core is connected to the cam and passes through a receiving cavity extending along a second direction, when the cam rotates around the first direction, it can drive the valve core to move relative to the valve body in the receiving cavity along the second direction. When the valve core moves relative to the valve body in the receiving cavity along the second direction, it can connect one of the oil inlet channel and the first connecting channel and the second connecting channel, and connect the other of the oil return channel and the first connecting channel and the second connecting channel. When the oil inlet channel is connected to the first connecting channel and the oil return channel is connected to the second connecting channel, hydraulic oil enters the external pipeline through the first connecting channel and flows back to the hydraulic directional valve of this application through the second connecting channel. When the first connection channel is open, hydraulic oil enters the external pipeline through the second connection channel and flows back to the hydraulic directional valve of this application through the first connection channel, thereby realizing the switching function of the hydraulic directional valve. At the same time, since the reset member is used to apply a thrust to the valve core in the second direction toward the cam, when the cam drives the valve core to move relative to the valve body in the second direction in the receiving cavity, the reset member can drive the valve core to move toward the cam, so that the valve core can maintain a pushing relationship with the cam, thereby ensuring the accuracy of the valve core's movement in the second direction in the receiving cavity. In this way, the hydraulic directional valve of this application can achieve accurate driving of the valve core without setting electromagnetic devices on both sides of the valve core, which can reduce the structural size of the hydraulic directional valve and make the hydraulic directional valve of this application have a wider range of applications.

[0009] According to the hydraulic directional valve of the first aspect of this application, the valve body assembly further includes a guide member disposed between the cam and the valve body and connected to the valve body. The guide member has a guide hole, and at least part of the valve core near the cam protrudes from the receiving cavity and passes through the guide hole.

[0010] According to a first aspect embodiment of the hydraulic directional valve of this application, the hydraulic directional valve further includes a fixed seat, the fixed seat is connected to the valve body, the drive assembly further includes a drive member and a drive shaft, the drive member is connected to the fixed seat, the drive shaft extends along the first direction, one end of the drive shaft is connected to the output end of the drive member, the other end of the drive shaft is rotatably connected to the fixed seat, and the cam is sleeved on the drive shaft.

[0011] According to a first aspect embodiment of the hydraulic directional valve of this application, the valve core assembly further includes a fixing member connected to one end of the valve body away from the cam along the second direction, and the end of the reset member away from the valve core along the second direction is connected to the fixing member.

[0012] According to a first aspect embodiment of the hydraulic directional valve of this application, the fixing member has a fixing part and a connecting part. The fixing part is connected to the valve body, the connecting part is connected to the fixing part and protrudes from the fixing part in the second direction toward the valve core, and the connecting part is located in the receiving cavity. The reset member is a spring reset member, one end of the spring reset member is connected to the valve core, and the other end of the spring reset member is sleeved on the connecting part.

[0013] According to the hydraulic directional valve of the first aspect of this application, when the valve core moves along the second direction to a first preset position, the oil inlet channel and the oil return channel are connected through the receiving cavity; when the valve core moves along the second direction to a second preset position, the oil inlet channel and the first connecting channel are connected through the receiving cavity, and the second connecting channel and the oil return channel are connected through the receiving cavity; when the valve core moves along the second direction to a third preset position, the oil inlet channel and the second connecting channel are connected through the receiving cavity, and the first connecting channel and the oil return channel are connected through the receiving cavity.

[0014] According to a first aspect embodiment of the hydraulic directional valve of this application, the valve core includes a core body and two directional parts. The core body extends along a second direction and moves relative to the valve body along the second direction. The two directional parts are spaced apart on the core body along the second direction and both protrude from the outer surface of the core body. Each directional part abuts against the cavity wall of the receiving cavity. When the core body moves along the second direction to the first preset position, one of the directional parts blocks the first connecting channel, and the other directional part blocks the second connecting channel.

[0015] According to the hydraulic directional valve of the first aspect of this application, when the core moves to the second preset position along the second direction, each of the directional valves is offset from the first connecting channel, the oil inlet channel, the second connecting channel and the oil return channel, and one of the directional valves is disposed between the oil inlet channel and the second connecting channel, and the other directional valve is disposed on the side of the first connecting channel away from the oil inlet channel along the second direction.

[0016] According to the hydraulic directional valve of the first aspect of this application, the core body is further provided with an oil inlet, an oil passage, and an oil outlet. The two ends of the oil passage are respectively connected to the receiving cavity through the oil inlet and the oil outlet. Two directional parts are arranged between the oil inlet and the oil outlet along the second direction. When the core body moves to the third preset position along the second direction, each directional part is staggered from the first connecting channel, the oil inlet channel, the second connecting channel, and the return oil channel. One of the directional parts is arranged between the oil inlet channel and the first connecting channel, and the other directional part is arranged between the return oil channel and the second connecting channel. The oil inlet is connected to the first connecting channel, and the oil outlet is connected to the return oil channel.

[0017] A hydraulic system according to a second aspect of this application includes: a hydraulic directional valve as described above.

[0018] The hydraulic system of this application has the following advantages:

[0019] In the hydraulic system of this application, since the hydraulic directional valve of this application can have a small structural size, the hydraulic system of this application can be used in equipment with limited space, so that the hydraulic system of this application has a wider range of applications. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This application shows a schematic diagram of the structure of multiple hydraulic directional valves connected in parallel;

[0022] Figure 2 A cross-sectional view of the hydraulic directional valve in this application is shown.

[0023] Figure 3 This application shows a schematic cross-sectional view of the valve body assembly and the valve core assembly. Figure 1 ;

[0024] Figure 4 This application shows a schematic cross-sectional view of the valve body assembly and the valve core assembly. Figure 2 ;

[0025] Figure 5 This application shows a schematic cross-sectional view of the valve body assembly and the valve core assembly. Figure 3 ;

[0026] Figure 6 A cross-sectional view of the driving component in this application is shown.

[0027] Explanation of key component symbols:

[0028] 10-Hydraulic directional valve;

[0029] 100 - Drive assembly; 110 - Cam; 120 - Drive element; 130 - Drive shaft;

[0030] 200 - Valve body assembly; 210 - Valve body; 211 - Receiving cavity; 212 - First connecting channel; 213 - Second connecting channel; 214 - Oil inlet channel; 215 - Oil return channel; 220 - Guide member; 221 - Guide hole;

[0031] 300-Valve core assembly; 310-Valve core; 311-Core body; 312-Reversing part; 313-Oil inlet; 314-Oil passage; 315-Oil outlet; 320-Reset part; 330-Fixing part; 331-Fixing part; 332-Connecting part;

[0032] 400-Fixed base;

[0033] x - First direction; y - Second direction. Detailed Implementation

[0034] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0035] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] Reference Figures 2 to 5 As shown, the hydraulic directional valve 10 involved in the embodiments of this application has a first direction x and a second direction y, the first direction x and the second direction y intersect each other, and the hydraulic directional valve 10 includes: a drive assembly 100, a valve body assembly 200 and a valve core assembly 300.

[0040] Specifically, the drive assembly 100 includes a cam 110, which rotates about a first direction x; the valve body assembly 200 includes a valve body 210, which is spaced apart from the cam 110 along a second direction y. The valve body 210 has a receiving cavity 211, a first connecting channel 212, a second connecting channel 213, an oil inlet channel 214, and an oil return channel 215. The receiving cavity 211 extends along the second direction y, and the first connecting channel 212, the oil inlet channel 214, the second connecting channel 213, and the oil return channel 215 are arranged sequentially at intervals along the second direction y and are all connected to the receiving cavity 211. The first connecting channel 212 is connected to the second connecting channel 213; the valve core assembly 300 includes a valve core 310. The valve core 310 and the reset member 320 are both disposed in the receiving cavity 211. The two ends of the valve core 310 along the second direction y are respectively connected to the cam 110 and the reset member 320. The end of the reset member 320 along the second direction y away from the valve core 310 is connected to the valve body 210. The cam 110 is used to drive the valve core 310 to move relative to the valve body 210 along the second direction y, so that one of the oil inlet channel 214 and the first connecting channel 212 and the second connecting channel 213 are connected, and the other of the oil return channel 215 and the first connecting channel 212 and the second connecting channel 213 are connected. The reset member 320 is used to apply a thrust to the valve core 310 along the second direction y towards the cam 110.

[0041] It should be noted that the first direction x is Figure 2 The direction indicated by x in the middle, and the second direction y is... Figure 2 The direction indicated by y in the middle.

[0042] In this application, since the cam 110 rotates about the first direction x, and the valve core 310 is connected to the cam 110 and passes through the receiving cavity 211 extending along the second direction y, when the cam 110 rotates about the first direction x, it can drive the valve core 310 to move relative to the valve body 210 in the receiving cavity 211 along the second direction y. When the valve core 310 moves relative to the valve body 210 in the receiving cavity 211 along the second direction y, the oil inlet channel 214 and the first connecting channel 214 can be connected. The first connecting channel 212 is connected to one of the two connecting channels 213, and the return oil channel 215 and the first connecting channel 212 are connected to the other connecting channel 213. When the inlet channel 214 is connected to the first connecting channel 212 and the return oil channel 215 is connected to the second connecting channel 213, the hydraulic oil enters the external pipeline through the first connecting channel 212 and flows back to the hydraulic directional valve 10 of this application through the second connecting channel 213. When the inlet channel 214 is connected to the second connecting channel 213... When the return oil passage 215 is connected to the first connecting passage 212, the hydraulic oil enters the external pipeline through the second connecting passage 213 and flows back to the hydraulic directional valve 10 of this application through the first connecting passage 212, thereby realizing the switching function of the hydraulic directional valve 10. At the same time, since the reset member 320 is used to apply a thrust to the valve core 310 in the second direction y towards the cam 110, when the cam 110 drives the valve core 310 to move relative to the valve body 210 in the receiving cavity 211 in the second direction y, When the valve core 310 is driven to move toward the cam 110 by the reset member 320, the valve core 310 can maintain a pushing relationship with the cam 110, thereby ensuring the accuracy of the valve core 310 moving in the second direction y within the receiving cavity 211. Thus, the hydraulic directional valve 10 of this application does not need to be equipped with electromagnetic devices on both sides of the valve core 310 to achieve accurate driving of the valve core 310, thereby reducing the structural size of the hydraulic directional valve 10 and making the hydraulic directional valve 10 of this application have a wider range of applications.

[0043] Reference Figures 3 to 5 As shown, the valve body assembly 200 also includes a guide 220, which is disposed between the cam 110 and the valve body 210 and connected to the valve body 210. The guide 220 is provided with a guide hole 221. At least one end of the valve core 310 near the cam 110 protrudes from the receiving cavity 211 and passes through the guide hole 221.

[0044] In this embodiment, since the end of the valve core 310 near the cam 110 at least partially protrudes from the receiving cavity 211 and passes through the guide hole 221, when the cam 110 drives the valve core 310 to move relative to the valve body 210 in the second direction y, the valve core 310 can simultaneously pass through the receiving cavity 211 and the guide hole 221. Since the guide member 220 is disposed between the cam 110 and the valve body 210, the guide member 220 can be disposed near the pushing end of the valve core 310 and the cam 110, so as to guide the movement of the valve core 310 in the second direction y through the guide member 220, thereby improving the smoothness of the movement of the valve core 310 in the second direction y within the receiving cavity 211.

[0045] Reference Figure 6 As shown, the hydraulic directional valve 10 also includes a fixed seat 400, which is connected to the valve body 210. The drive assembly 100 also includes a drive member 120 and a drive shaft 130. The drive member 120 is connected to the fixed seat 400, and the drive shaft 130 extends along the first direction x. One end of the drive shaft 130 is connected to the output end of the drive member 120, and the other end of the drive shaft 130 is rotatably connected to the fixed seat 400. The cam 110 is sleeved on the drive shaft 130.

[0046] In this embodiment, since the drive shaft 130 is connected to the output end of the drive member 120, and the cam 110 is sleeved on the drive shaft 130, the drive member 120 can drive the drive shaft 130 to rotate around the first direction x, so that the drive shaft 130 can drive the cam 110 to rotate around the first direction x. Furthermore, since the drive shaft 130 extends along the first direction x, and the end of the drive shaft 130 away from the drive member 120 is rotatably connected to the fixed base 400, the direction accuracy of the drive shaft 130 rotating around the first direction x can be ensured, thereby ensuring the direction accuracy of the cam 110 rotating around the first direction x.

[0047] Reference Figures 3 to 5 As shown, the valve core assembly 300 also includes a fixing member 330, which is connected to the end of the valve body 210 away from the cam 110 along the second direction y, and the end of the reset member 320 away from the valve core 310 along the second direction y is connected to the fixing member 330.

[0048] In this embodiment, since the fixing member 330 is connected to the end of the valve body 210 away from the cam 110 along the second direction y, and the end of the reset member 320 away from the valve core 310 along the second direction y is connected to the fixing member 330, the reset member 320 can be connected to the valve body 210 through the fixing member 330, thereby improving the structural stability of the reset member 320 and ensuring that the reset member 320 can play the role of resetting the valve core 310.

[0049] Continue to refer to Figures 3 to 5 As shown, the fixing member 330 has a fixing part 331 and a connecting part 332. The fixing part 331 is connected to the valve body 210, and the connecting part 332 is connected to the fixing part 331 and protrudes from the fixing part 331 in the second direction y toward the valve core 310. The connecting part 332 is located in the receiving cavity 211. The reset member 320 is a spring reset member 320. One end of the spring reset member 320 is connected to the valve core 310, and the other end of the spring reset member 320 is sleeved on the connecting part 332.

[0050] In this embodiment, the connecting part 332 can be fixedly connected to the valve body 210 through the fixing part 331. Since the connecting part 332 protrudes from the fixing part 331 in the direction of the second direction y toward the valve core 310, and the end of the spring return member 320 away from the valve core 310 is sleeved on the connecting part 332, the spring return member 320 can be connected to the fixing part 330 through the connecting part 332. At the same time, the connecting part 332 can guide the extension and retraction of the spring return member 320 in the second direction y, so as to ensure that the spring return member 320 can extend and retract in the second direction y, thereby enabling the spring return member 320 to apply a thrust in the second direction y to the valve core 310.

[0051] Continue to refer to Figures 3 to 5 As shown, when the valve core 310 moves along the second direction y to the first preset position, the oil inlet channel 214 and the oil return channel 215 are connected through the receiving cavity 211. When the valve core 310 moves along the second direction y to the second preset position, the oil inlet channel 214 and the first connecting channel 212 are connected through the receiving cavity 211, and the second connecting channel 213 and the oil return channel 215 are connected through the receiving cavity 211. When the valve core 310 moves along the second direction y to the third preset position, the oil inlet channel 214 and the second connecting channel 213 are connected through the receiving cavity 211, and the first connecting channel 212 and the oil return channel 215 are connected through the receiving cavity 211.

[0052] In this embodiment, when the valve core 310 moves along the second direction y to the first preset position, the oil inlet channel 214 and the oil return channel 215 are connected through the receiving cavity 211. At this time, the hydraulic oil does not pass through the first connecting channel 212 and the second connecting channel 213, so the hydraulic directional valve 10 is in a closed state, and the pipeline of the hydraulic system is not connected at this point. When the valve core 310 moves along the second direction y to the second preset position, the oil inlet channel 214 and the first connecting channel 212 are connected through the receiving cavity 211, and the second connecting channel 213 and the oil return channel 215 are connected through the receiving cavity 211. At this time, the hydraulic oil enters the receiving cavity 211 through the oil inlet channel 214, enters the pipeline of the hydraulic system through the first connecting channel 212, flows back to the receiving cavity 211 through the second connecting channel 213, and finally flows out of the hydraulic directional valve 10 through the oil return channel 215. During this process, the hydraulic oil... The flow direction in the hydraulic system pipeline is from the first connecting channel 212 to the second connecting channel 213. When the valve core 310 moves to the third preset position along the second direction y, the oil inlet channel 214 and the second connecting channel 213 are connected through the receiving cavity 211, and the first connecting channel 212 and the return oil channel 215 are connected through the receiving cavity 211. At this time, the hydraulic oil enters the receiving cavity 211 through the oil inlet channel 214, and enters the hydraulic system pipeline through the second connecting channel 213. Then it flows back to the receiving cavity 211 through the first connecting channel 212, and finally flows out of the hydraulic directional valve 10 through the return oil channel 215. During this process, the flow direction of the hydraulic oil in the hydraulic system pipeline is from the second connecting channel 213 to the first connecting channel 212. In this way, the opening, closing and reversing of the hydraulic directional valve 10 can be realized by the movement of the valve core 310 in the receiving cavity 211.

[0053] Reference Figure 3 As shown, the valve core 310 includes a core body 311 and two switching parts 312. The core body 311 extends along the second direction y and moves relative to the valve body 210 along the second direction y. The two switching parts 312 are spaced apart on the core body 311 along the second direction y and both protrude from the outer surface of the core body 311. Each switching part 312 abuts against the cavity wall of the receiving cavity 211. When the core body 311 moves along the second direction y to the first preset position, one of the switching parts 312 blocks the first connecting channel 212 and the other switching part 312 blocks the second connecting channel 213.

[0054] In this embodiment, when the core 311 moves along the second direction y to the first preset position, one of the reversing parts 312 blocks the first connecting channel 212 and the other reversing part 312 blocks the second connecting channel 213. At this time, the first connecting channel 212 and the second connecting channel 213 can be blocked by the two reversing parts 312, so that the hydraulic oil cannot flow into the pipeline of the hydraulic system through the first connecting channel 212 and the second connecting channel 213, so that the hydraulic reversing valve 10 is in the closed state.

[0055] Reference Figure 4 As shown, when the core 311 moves along the second direction y to the second preset position, each reversing part 312 is offset from the first connecting channel 212, the oil inlet channel 214, the second connecting channel 213 and the oil return channel 215. One reversing part 312 is located between the oil inlet channel 214 and the second connecting channel 213, and the other reversing part 312 is located on the side of the first connecting channel 212 away from the oil inlet channel 214 along the second direction y.

[0056] In this embodiment, when the core 311 moves along the second direction y to the second preset position, since one of the reversing parts 312 is located between the oil inlet channel 214 and the second connecting channel 213, and the other reversing part 312 is located on the side of the first connecting channel 212 away from the oil inlet channel 214 along the second direction y, the oil inlet channel 214 and the second connecting channel 213 can be isolated by one of the reversing parts 312, and the oil inlet channel 214 can be connected to the first connecting channel 212 by the other reversing part 312. Furthermore, because each reversing part... 312 is staggered from the first connecting channel 212, the oil inlet channel 214, the second connecting channel 213, and the oil return channel 215. Therefore, the oil return channel 215 can be connected to the second connecting channel 213. In this way, the oil inlet channel 214 can be connected to the first connecting channel 212, and the oil return channel 215 can be connected to the second connecting channel 213. This allows the hydraulic oil of the hydraulic directional valve 10 to enter the pipeline of the hydraulic system through the first connecting channel 212, and then flow back to the hydraulic directional valve 10 through the second connecting channel 213.

[0057] Reference Figure 5As shown, the core 311 is also provided with an oil inlet 313, an oil passage 314, and an oil outlet 315. The two ends of the oil passage 314 are connected to the receiving cavity 211 through the oil inlet 313 and the oil outlet 315, respectively. Two reversing parts 312 are arranged between the oil inlet 313 and the oil outlet 315 along the second direction y. When the core 311 moves to the third preset position along the second direction y, each reversing part 312 is staggered from the first connecting channel 212, the oil inlet channel 214, the second connecting channel 213, and the return oil channel 215. One reversing part 312 is arranged between the oil inlet channel 214 and the first connecting channel 212, and the other reversing part 312 is arranged between the return oil channel 215 and the second connecting channel 213. The oil inlet 313 is connected to the first connecting channel 212, and the oil outlet 315 is connected to the return oil channel 215.

[0058] In this embodiment, when the core 311 moves along the second direction y to the third preset position, since each reversing part 312 is staggered from the first connecting channel 212, the oil inlet channel 214, the second connecting channel 213, and the oil return channel 215, and one reversing part 312 is located between the oil inlet channel 214 and the first connecting channel 212, and the other reversing part 312 is located between the oil return channel 215 and the second connecting channel 213, the oil inlet channel 214 can be isolated from the first connecting channel 212 by one reversing part 312, and the oil return channel 215 can be isolated from the second connecting channel 213 by the other reversing part 312. Channel 213 is isolated so that the oil inlet channel 214 can communicate with the second connecting channel 213 and the oil return channel 215 can communicate with the first connecting channel 212. Since the oil inlet 313 is connected with the first connecting channel 212 and the oil outlet 315 is connected with the oil return channel 215, hydraulic oil can enter the pipeline of the hydraulic system through the oil inlet channel 214, the receiving cavity 211 and the second connecting channel 213, and then flow back to the receiving cavity 211 through the first connecting channel 212. Finally, it flows out of the hydraulic directional valve 10 through the oil inlet 313, the oil passage 314, the oil outlet 315 and the oil return channel 215 in sequence.

[0059] The hydraulic system involved in the embodiments of this application includes: the hydraulic directional valve 10 described above.

[0060] In the hydraulic system of this application, since the hydraulic directional valve 10 of this application can have a small structural size, the hydraulic system of this application can be used in equipment with limited space, so that the hydraulic system of this application has a wider range of applications.

[0061] Reference Figure 1As shown, the hydraulic system of this application includes multiple hydraulic directional valves 10, which are arranged in parallel. The oil inlet channel 214 of each hydraulic directional valve 10 is interconnected, and the oil return channel 215 of each hydraulic directional valve 10 is interconnected, so as to simultaneously supply and discharge oil to multiple hydraulic directional valves 10, thereby improving the control uniformity of the hydraulic system.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A hydraulic directional valve, characterized in that, The hydraulic directional valve includes a first direction and a second direction, the first direction intersecting the second direction, and includes: The drive assembly includes a cam that rotates about the first direction; A valve body assembly includes a valve body, wherein the valve body and the cam are spaced apart along the second direction. The valve body is provided with a receiving cavity, a first connecting channel, a second connecting channel, an oil inlet channel, and an oil return channel. The receiving cavity extends along the second direction. The first connecting channel, the oil inlet channel, the second connecting channel, and the oil return channel are arranged sequentially at intervals along the second direction and are all connected to the receiving cavity. The first connecting channel is connected to the second connecting channel. A valve core assembly includes a valve core and a reset member, both of which are disposed within the receiving cavity. The two ends of the valve core along the second direction are respectively connected to the cam and the reset member. The end of the reset member along the second direction away from the valve core is connected to the valve body. The cam drives the valve core to move relative to the valve body along the second direction, thereby connecting the oil inlet channel and the first connecting channel with one of the second connecting channels, and connecting the oil return channel and the first connecting channel with the other of the second connecting channel. The reset member applies a thrust to the valve core along the second direction toward the cam.

2. The hydraulic directional valve according to claim 1, characterized in that, The valve body assembly further includes a guide member disposed between the cam and the valve body and connected to the valve body. The guide member has a guide hole, and at least part of the valve core near the cam protrudes from the receiving cavity and passes through the guide hole.

3. The hydraulic directional valve according to claim 1, characterized in that, The hydraulic directional valve further includes a fixed seat, which is connected to the valve body. The drive assembly further includes a drive component and a drive shaft. The drive component is connected to the fixed seat, and the drive shaft extends along the first direction. One end of the drive shaft is connected to the output end of the drive component, and the other end of the drive shaft is rotatably connected to the fixed seat. The cam is sleeved on the drive shaft.

4. The hydraulic directional valve according to claim 1, characterized in that, The valve core assembly further includes a fixing member connected to one end of the valve body away from the cam along the second direction, and the resetting member connected to the fixing member at one end of the valve core away from the valve core along the second direction.

5. The hydraulic directional valve according to claim 4, characterized in that, The fixing member has a fixing part and a connecting part. The fixing part is connected to the valve body, and the connecting part is connected to the fixing part and protrudes from the fixing part in the second direction toward the valve core. The connecting part is located in the receiving cavity. The reset member is a spring reset member. One end of the spring reset member is connected to the valve core, and the other end of the spring reset member is sleeved on the connecting part.

6. The hydraulic directional valve according to claim 1, characterized in that, When the valve core moves along the second direction to the first preset position, the oil inlet channel and the oil return channel are connected through the receiving cavity. When the valve core moves along the second direction to the second preset position, the oil inlet channel and the first connecting channel are connected through the receiving cavity, and the second connecting channel and the oil return channel are connected through the receiving cavity. When the valve core moves along the second direction to the third preset position, the oil inlet channel and the second connecting channel are connected through the receiving cavity, and the first connecting channel and the oil return channel are connected through the receiving cavity.

7. The hydraulic directional valve according to claim 6, characterized in that, The valve core includes a core body and two switching parts. The core body extends along the second direction and moves relative to the valve body along the second direction. The two switching parts are spaced apart on the core body along the second direction and both protrude from the outer surface of the core body. Each switching part abuts against the cavity wall of the receiving cavity. When the core body moves along the second direction to the first preset position, one of the switching parts blocks the first connecting channel, and the other switching part blocks the second connecting channel.

8. The hydraulic directional valve according to claim 7, characterized in that, When the core moves to the second preset position along the second direction, each of the reversing parts is staggered from the first connecting channel, the oil inlet channel, the second connecting channel and the oil return channel, and one of the reversing parts is located between the oil inlet channel and the second connecting channel, and the other reversing part is located on the side of the first connecting channel away from the oil inlet channel along the second direction.

9. The hydraulic directional valve according to claim 7, characterized in that, The core body is also provided with an oil inlet, an oil passage, and an oil outlet. The two ends of the oil passage are connected to the receiving cavity through the oil inlet and the oil outlet, respectively. Two reversing parts are arranged between the oil inlet and the oil outlet along the second direction. When the core body moves to the third preset position along the second direction, each reversing part is staggered from the first connecting channel, the oil inlet channel, the second connecting channel, and the return oil channel. One of the reversing parts is arranged between the oil inlet channel and the first connecting channel, and the other reversing part is arranged between the return oil channel and the second connecting channel. The oil inlet is connected to the first connecting channel, and the oil outlet is connected to the return oil channel.

10. A hydraulic system, characterized in that, include: The hydraulic directional valve as described in any one of claims 1-9.

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