A new type of multi-position directional valve

Abstract

This invention relates to a novel multi-position directional control valve, comprising a servo motor, a valve body, and an electromagnetic assembly. The servo motor is connected to one end of the valve body; the electromagnetic assembly is installed at the other end of the valve body. The valve body includes a valve body and a valve core. A main hole is formed on the axis of the valve body, and P, T, A, and B oil passages are formed radially on the valve body. There are two P oil passages. The P and A oil passages and the B and P oil passages are located on both sides of the middle section of the valve core, respectively. The T oil passage is located between the A and B oil passages. A crescent groove is formed on the inner wall of the main hole. The valve core is installed in the main hole of the valve body and can move relative to the main hole of the valve body. A spring seat and a spring are installed between the servo motor and the valve core. This invention features symmetrical recessed grooves on the middle section of the valve core. By adjusting the relative position of the recessed grooves and the crescent grooves, the oil passage can be opened or closed. Through the interaction between the oil passages of the valve core and the valve body, various working functions can be switched.

Description

Technical Field

[0001] This invention relates to a novel multi-position directional valve, specifically a five-position four-way directional valve adapted to complex hydraulic control systems. Background Technology

[0002] A directional control valve is a valve that changes the direction of oil flow by using the relative movement of the valve core within the valve body bore to connect or disconnect the oil circuit. Based on the working position of the valve core within the valve body, they can be classified as two-position, three-position, and four-position. For complex hydraulic control systems that require multiple flow control functions, a combination of multiple two-position and three-position control valves is necessary. This increases the number of directional control valves in the system, thereby increasing system weight and the complexity of the oil circuit design. Summary of the Invention

[0003] The technical problem solved by this invention is to overcome the shortcomings of the prior art and propose a new type of multi-position directional valve. By controlling the action of the servo motor, the valve core is rotated, thereby opening or closing the oil circuit to control the direction of the fluid flow. It achieves five working functions and integrates multiple working position functions.

[0004] The solution of the present invention is:

[0005] A novel multi-position directional valve includes a servo motor, a valve body, and an electromagnetic assembly.

[0006] The servo motor is connected to one end of the valve body, and the first sealing ring is used to achieve external sealing of the oil.

[0007] The electromagnetic component is installed at the other end of the valve body, and a second sealing ring is used to achieve external sealing of the oil.

[0008] The valve body includes a valve body and a valve core. A main hole is opened on the axis of the valve body, and oil passage holes P, T, A, and B are opened on the radial direction of the valve body. There are two P oil passage holes. The P and A oil passage holes and the B and P oil passage holes are located on both sides of the middle section of the valve core, respectively. The T oil passage hole is located in the middle of the A and B oil passage holes.

[0009] The inner wall of the main hole is provided with a crescent groove;

[0010] The valve core is installed in the main bore of the valve body and can move relative to the valve core within the main bore of the valve body; a spring seat and a spring are installed between the servo motor and the valve core;

[0011] The outer diameters at both ends of the valve core are equivalent to the main bore diameter of the valve body; the maximum outer diameter of the middle section of the valve core is equivalent to the main bore diameter of the valve body. There are symmetrical recessed grooves on the middle section of the valve core. By adjusting the relative position of the recessed grooves and the crescent grooves, the oil circuit can be opened or closed. Through the cooperation between the oil passage holes of the valve core and the valve body, the switching of various working functions can be realized.

[0012] Furthermore, the electromagnetic assembly includes a coil, an upper magnetic conductor, a lower magnetic conductor, an outer magnetic conductor, a magnetic shielding ring, an armature, a push rod, and an end cap.

[0013] The magnetic shielding ring is positioned between the upper and lower magnetic conductors and is fitted with a coil.

[0014] The coil is fitted with an outer magnetic conductor, which is fixedly connected to the lower magnetic conductor through an end cap. The lower magnetic conductor has a hole in the middle, and the top rod is placed in the middle hole of the lower magnetic conductor. A cavity is formed between the magnetic isolation ring, the upper magnetic conductor, and the lower magnetic conductor. The armature is installed in the cavity of the electromagnetic assembly.

[0015] Furthermore, when the coil is energized, the armature moves axially, driving the push rod to extend.

[0016] Furthermore, a third sealing ring is installed between the end cap and the upper magnetic conductor to achieve external sealing of the electromagnetic component's oil.

[0017] Furthermore, the valve core is connected to the servo motor spindle via ball bearings, and the servo motor drives the valve core to rotate.

[0018] Furthermore, when the coil is de-energized, the elastic force of the spring is used to reset the valve core, push rod, and armature.

[0019] Furthermore, when the coil is energized, the armature moves axially, causing the push rod to extend, thereby driving the valve core to move axially.

[0020] Furthermore, when the recessed groove and the crescent groove are engaged, the oil enters through the P oil passage on the right side, flows through the B oil passage and the gap between the recessed groove and the main hole, and the gap between the recessed groove and the crescent groove, and flows out through the A and T oil passages on the left side, thus realizing the interconnection of the P, B, A, and T oil passages on the right side.

[0021] Furthermore, when the recessed groove is far from the crescent groove, in the first case: when the recessed groove is located on the right side of the crescent groove, the oil enters through the P oil passage on the right side, flows through the B oil passage and the gap between the recessed groove and the main hole, and flows out through the T oil passage, realizing the interconnection of the P, B and T oil passages on the right side.

[0022] Furthermore, in the second scenario: when the recessed groove is located on the left side of the crescent groove, the oil enters through the P oil passage on the left side, flows through the A oil passage and the gap between the recessed groove and the main hole, and flows out through the T oil passage, thus realizing the interconnection of the P, A, and T oil passages on the left side.

[0023] Furthermore, when the valve core is in the zero position, that is, when the recessed groove and the crescent groove are engaged, the valve core is subjected to the elastic force of the spring and is located at the right end of the valve body. At this time, the four oil passages P, T, A and B on the right side are interconnected, realizing the first working function.

[0024] Furthermore, the valve core is located at the right end of the valve body. Driven by the servo motor, the valve core rotates 90 degrees clockwise from its zero position. At this time, the three oil passages P, T, and B on the right side are interconnected, while the oil passage A is closed, thus realizing the second working function.

[0025] Furthermore, when the valve core is at the right end of the valve body, it rotates 90 degrees counterclockwise from the zero position under the drive of the servo motor. At this time, the right side P oil passage is connected to the B oil passage, the A oil passage is connected to the T oil passage, and the right side P oil passage and T oil passage are not directly connected, thus realizing the third working function.

[0026] Furthermore, when the valve core is subjected to electromagnetic force and is located at the left end of the valve body, and driven by the servo motor, it rotates 90 degrees clockwise from the zero position. At this time, the left P oil passage is connected to the A oil passage, the B oil passage is connected to the T oil passage, and the left P oil passage is not directly connected to the T oil passage, thus realizing the fourth working function.

[0027] Furthermore, when the valve core is subjected to electromagnetic force and is located at the left end of the valve body, and is driven by the servo motor, it rotates 90 degrees counterclockwise from the zero position of the valve core. At this time, the three oil passages P, T, and A on the left side are interconnected, while the oil passage B is closed, thus realizing the fifth working function.

[0028] The advantages of this invention compared to the prior art are:

[0029] (1) By switching the electromagnetic components on and off and controlling the rotation of the servo motor, the present invention can realize the axial and rotational movement of the valve core, thereby realizing five working functions and has the characteristics of multi-station function integration.

[0030] (2) Through the multi-step irregular structure design of the valve core, the present invention can connect or disconnect the oil circuit to control the direction of liquid flow when the valve core makes relative axial and rotational movements with respect to the valve body, thereby realizing different control functions;

[0031] (3) The ball bearings of the present invention not only act as a key to drive the valve core to rotate, but also reduce the frictional resistance between the valve core and the servo shaft when the valve core moves axially, thereby improving the flexibility of movement. Attached Figure Description

[0032] Figure 1 The diagram illustrates the five working functions;

[0033] Figure 2 The diagram shows the structure of a multi-position directional valve, where (a) is the external structural diagram and (b) is the sectional view.

[0034] Figure 3 The diagrams show the structure of a multi-step irregular valve core, where (a) and (b) are diagrams of the multi-step irregular valve core structure from different perspectives.

[0035] Figure 4The diagram shows the functional principle of the first workstation, where (a) is a structural diagram, (b) is a schematic diagram, and (c) is a graphic symbol.

[0036] Figure 5 The diagram shows the functional principle of the second workstation, where (a) is a structural diagram, (b) is a schematic diagram, and (c) is a graphic symbol.

[0037] Figure 6 The diagram shows the functional principle of the third workstation, where (a) is the structural diagram, (b) is the schematic diagram, and (c) is the graphic symbol.

[0038] Figure 7 The diagram shows the functional principle of the fourth workstation, where (a) is the structural diagram, (b) is the schematic diagram, and (c) is the graphic symbol.

[0039] Figure 8 The diagram shows the functional principle of the fifth workstation, where (a) is the structural diagram, (b) is the schematic diagram, and (c) is the graphic symbol.

[0040] Among them, 1-servo motor; 2-valve body; 3-electromagnetic assembly; 4-first screw; 5-second screw; 6-third screw; 7-first sealing ring; 8-spring seat; 9-spring; 10-ball bearing; 11-valve body; 12-valve core; 13-push rod; 14-second sealing ring; 15-outer magnetic conductor; 16-coil; 17-end cap; 18-third sealing ring; 19-upper magnetic conductor; 20-armature; 21-magnetic shielding ring; 22-lower magnetic conductor; 23-crescent groove. Detailed Implementation

[0041] The present invention will be further described below with reference to the embodiments.

[0042] like Figure 1 As shown, when the valve core moves relative to the valve body in the axial and rotational directions, it connects or disconnects the oil circuit to control the direction of the fluid flow, thus realizing five working functions and having the advantages of integrated design of multiple workstation functions.

[0043] like Figure 2 As shown, the overall layout of this directional valve is axial, mainly composed of a servo motor 1, a valve body 2, and an electromagnetic assembly 3. The servo motor 1 is connected to the valve body via four third screws 6, and a first sealing ring 7 is used to achieve external sealing of the oil. The electromagnetic assembly 3 is installed on the valve body via four second screws 5, and a second sealing ring 7 is used to achieve external sealing of the oil.

[0044] Among them, the electromagnetic component 3 is mainly composed of coil 16, upper magnetic conductor 19, lower magnetic conductor 22, outer magnetic conductor 15, magnetic isolation ring 21, armature 20, top rod 13, and end cap 17 connected in series.

[0045] A magnetic shielding ring 21 is located between the upper magnetic conductor 19 and the lower magnetic conductor 22, connected by welding, and fitted with a coil 16. The coil 16 is fitted with an outer magnetic conductor 15, and the components are fixedly connected by an end cap 17 and a first screw 4. A push rod 13 is installed in the middle hole of the lower magnetic conductor 22, and an armature 20 is installed inside the electromagnetic assembly 3. When the coil 16 is energized, the armature 20 moves axially, driving the push rod 13 to extend. A third sealing ring 18 is installed between the end cap and the upper magnetic conductor 19, providing an external seal for the oil in the electromagnetic assembly 3.

[0046] The valve body 2 mainly consists of a valve body 11 and a valve core 12. The valve body 11 has a main bore and P, T, A, and B oil passages, with a crescent groove 23 on the main bore. The valve core 12 is installed inside the main bore of the valve body 11 and can move relative to it. The valve core 12 is connected to the main shaft of the servo motor 1 via ball bearings 10, allowing it to rotate under the drive of the servo motor 1. A spring seat 8 and a spring 9 are installed between the servo motor 1 and the valve core 12. When the coil 16 is de-energized, the elastic force of the spring 9 resets the valve core 12, the push rod 13, and the armature 20. When the coil 16 is energized, the armature 20 moves axially, causing the push rod 13 to extend, thereby driving the valve core 12 to move axially, thus achieving the axial movement of the valve core 12.

[0047] like Figure 3 As shown, the directional valve core 12 has a multi-step irregular structure. The central part has a ring-shaped platform structure of various widths on all four sides to connect the oil circuit, while the solid part disconnects the oil circuit. Through the cooperation between the valve core 12 and the oil passage of the valve body 2, the switching of various working functions can be achieved.

[0048] like Figure 4 As shown, when the valve core 12 is in the zero position, that is, when the recessed groove and the crescent groove 23 are engaged, the valve core 12 is subjected to the elastic force of the spring 9 and is located at the right end of the valve body 2. At this time, the four oil passages P, T, A and B on the right side are interconnected, realizing the first working function.

[0049] like Figure 5 As shown, when the valve core 12 is at the right end of the valve body 2, it rotates 90 degrees clockwise from the zero position state under the drive of the servo motor 1. At this time, the three oil passages P, T and B on the right side are interconnected, while the oil passage A is closed, thus realizing the second working function.

[0050] like Figure 6 As shown, when the valve core 12 is at the right end of the valve body 2, under the drive of the servo motor 1, the valve core 12 rotates 90 degrees counterclockwise from the zero position. At this time, the right side P oil passage is connected to the B oil passage, the A oil passage is connected to the T oil passage, and the right side P oil passage and T oil passage are not directly connected, thus realizing the third working function.

[0051] like Figure 7 As shown, when the valve core 12 is subjected to electromagnetic force and is located at the left end of the valve body 2, and driven by the servo motor 1, the valve core 12 rotates 90 degrees clockwise from the zero position. At this time, the left P oil passage is connected to the A oil passage, the B oil passage is connected to the T oil passage, and the left P oil passage and T oil passage are not directly connected, thus realizing the fourth working function.

[0052] like Figure 8 As shown, when the valve core 12 is subjected to electromagnetic force and is located at the left end of the valve body 2, and driven by the servo motor 1, the valve core 12 rotates 90 degrees counterclockwise from the zero position. At this time, the three oil passages P, T, and A on the left side are interconnected, while the oil passage B is closed, thus realizing the fifth working function.

[0053] This invention enables the axial and rotational movement of the valve core by switching the electromagnetic components on and off and controlling the rotation of the servo motor, thereby achieving five working functions and integrating multiple workstation functions.

[0054] This invention, through the multi-step irregular structure design of the valve core, can connect or disconnect the oil circuit to control the direction of fluid flow when the valve core makes axial and rotational relative movements with respect to the valve body, thereby achieving different control functions;

[0055] The ball bearings of this invention not only act as a key to drive the valve core to rotate, but also reduce the frictional resistance between the valve core and the servo shaft during axial movement of the valve core, thereby improving the flexibility of movement.

[0056] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. A novel multi-position directional control valve, characterized in that, It includes a servo motor (1), a valve body (2), and an electromagnetic assembly (3). The servo motor (1) is connected to one end of the valve body (2), and the first sealing ring (7) is used to achieve external sealing of the oil. The electromagnetic component (3) is installed at the other end of the valve body (2) and the second sealing ring (14) is used to achieve external sealing of the oil. The valve body (2) includes a valve body (11) and a valve core (12). A main hole is opened on the axis of the valve body (11), and P, T, A and B oil passage holes are opened on the radial side of the valve body (11). There are two P oil passage holes. The P and A oil passage holes and the B and P oil passage holes are located on both sides of the middle section of the valve core (12). The T oil passage hole is located in the middle of the A and B oil passage holes. The inner wall of the main hole is provided with a crescent groove (23); The valve core (12) is installed in the main hole of the valve body (11) and can move relative to the main hole of the valve body (11); a spring seat (8) and a spring (9) are installed between the servo motor (1) and the valve core (12). The outer diameters at both ends of the valve core (12) are equivalent to the main bore diameter of the valve body (11); the maximum outer diameter of the middle section of the valve core (12) is equivalent to the main bore diameter of the valve body (11); symmetrical recessed grooves are opened on the middle section of the valve core (12); the oil circuit can be switched by adjusting the relative position of the recessed grooves and the crescent groove (23); the switching of various working functions can be realized by the mutual cooperation between the oil passage holes of the valve core (12) and the valve body (2); When the valve core (12) is in the zero position, that is, when the recessed groove and the crescent groove (23) are engaged, the valve core (12) is subjected to the elastic force of the spring (9) and is located at the right end of the valve body (2). At this time, the four oil passages P, T, A and B on the right side are interconnected, realizing the first working function. When the valve core (12) is at the right end of the valve body (2), under the drive of the servo motor (1), the valve core (12) rotates 90 degrees clockwise from the zero position. At this time, the three oil passages P, T and B on the right side are interconnected, while the oil passage A is closed, thus realizing the second working function. When the valve core (12) is at the right end of the valve body (2), under the drive of the servo motor (1), the valve core (12) rotates 90 degrees counterclockwise from the zero position. At this time, the right side P oil passage is connected to the B oil passage, the A oil passage is connected to the T oil passage, and the right side P oil passage is not directly connected to the T oil passage, thus realizing the third working function. When the valve core (12) is subjected to electromagnetic force and is located at the left end of the valve body (2), and driven by the servo motor (1), the valve core (12) rotates 90 degrees clockwise from the zero position. At this time, the left P oil passage is connected to the A oil passage, the B oil passage is connected to the T oil passage, and the left P oil passage is not directly connected to the T oil passage, thus realizing the fourth working function. When the valve core (12) is subjected to electromagnetic force and is located at the left end of the valve body (2), and driven by the servo motor (1), the valve core (12) rotates 90 degrees counterclockwise from the zero position. At this time, the three oil passages P, T and A on the left side are interconnected, while the oil passage B is closed, thus realizing the fifth working function.

2. The novel multi-position directional valve according to claim 1, characterized in that, The electromagnetic assembly (3) includes a coil (16), an upper magnetic conductor (19), a lower magnetic conductor (22), an outer magnetic conductor (15), a magnetic isolation ring (21), an armature (20), a push rod (13), and an end cap (17). The magnetic shielding ring (21) is located between the upper magnetic conductor (19) and the lower magnetic conductor (22), and is wrapped with a coil (16). The coil (16) is covered with an outer magnetic conductor (15), which is fixedly connected to the lower magnetic conductor (22) through the end cap (17). The lower magnetic conductor (22) has a hole in the middle, and the top rod (13) is placed in the middle hole of the lower magnetic conductor (22). The magnetic isolation ring (21) forms a cavity with the upper magnetic conductor (19) and the lower magnetic conductor (22). The armature (20) is installed in the cavity of the electromagnetic assembly (3).

3. A novel multi-position directional valve according to claim 2, characterized in that, When the coil (16) is energized, the armature (20) moves axially, driving the push rod (13) to extend, thereby driving the valve core (12) to move axially.

4. A novel multi-position directional valve according to claim 1, characterized in that, The third sealing ring (18) is installed between the end cap and the upper magnetic conductor (19) to achieve external sealing of the oil in the electromagnetic component (3).

5. A novel multi-position directional valve according to claim 1, characterized in that, The valve core (12) is connected to the main shaft of the servo motor (1) through the ball bearing (10), and the valve core (12) rotates under the drive of the servo motor (1).

6. A novel multi-position directional valve according to claim 1, characterized in that, When the coil (16) is de-energized, the elastic force of the spring (9) is used to realize the reset function of the valve core (12), the push rod (13) and the armature (20).

7. A novel multi-position directional valve according to claim 1, characterized in that, When the recessed groove and the crescent groove (23) are engaged, the oil enters through the P oil passage on the right side, flows through the B oil passage and the gap between the recessed groove and the main hole, and the gap between the recessed groove and the crescent groove, and flows out through the A and T oil passages on the left side, realizing the interconnection of the P, B, A and T oil passages on the right side.

8. A novel multi-position directional valve according to claim 1, characterized in that, When the recessed groove is far away from the crescent groove (23), the first case is: when the recessed groove is located on the right side of the crescent groove (23), the oil enters through the P oil passage on the right side, flows through the B oil passage and the gap between the recessed groove and the main hole, and flows out through the T oil passage, realizing the interconnection of the P, B and T oil passages on the right side.

9. A novel multi-position directional valve according to claim 8, characterized in that, The second case: When the recessed groove is located on the left side of the crescent groove (23), the oil enters through the P oil passage on the left side, flows through the A oil passage and the gap between the recessed groove and the main hole, and flows out through the T oil passage, realizing the interconnection of the P, A and T oil passages on the left side.

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