Rotary indexing multiway valve

Abstract

The rotary displacement multi-way valve is designed on the basis of the original three-position five-way valve, a second working oil port which is also communicated with the valve hole is arranged on the plane perpendicular to the valve rod axis of the working oil port of the valve body, and the rotation of the valve rod is controlled by the operating lever to switch the communication of different working oil ports, then different oil cylinders are connected to the different working oil ports to achieve the function of controlling two working oil cylinders by using one control valve, further, the flow of hydraulic oil through the working oil port can be changed by controlling the size of the different working oil ports, thereby realizing the function of outputting different power by the switching operating lever of one control valve.

Description

Technical Field

[0001] This invention relates to the field of hydraulic valves, and more particularly to a rotary transposition multi-way valve. Background Technology

[0002] Hydraulic wood splitters require different output power from the cylinders to change the cylinder's propulsion speed when dealing with different types of wood. Different cylinders are controlled by different hydraulic valves. In the current technology, one hydraulic valve can only correspond to one output power. Therefore, multiple hydraulic valves are needed when switching between cylinders with different output powers. However, multiple hydraulic valves increase costs. Most critically, the design of multiple oil circuits increases the product size and wiring, and also increases the complexity of assembly. Therefore, it is necessary to design a hydraulic valve that can control multiple cylinders. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a rotary transposition multi-way valve that controls two hydraulic cylinders with a single hydraulic valve.

[0004] To achieve the above objectives, the present invention designs a rotary switching multi-way valve, comprising a valve body and a valve stem. The valve body has multiple oil chambers, valve holes connecting the multiple oil chambers, and inlet, return, and working ports connected to the corresponding oil chambers. The valve stem has a valve stem flow channel, and the valve stem can move and rotate axially within the valve hole to open or close the corresponding oil chambers, thereby enabling the rotary switching multi-way valve to switch between different working positions. The working position of the rotary switching multi-way valve includes a neutral position, in which the hydraulic oil of the rotary switching multi-way valve can return. The working ports include a first working port and a second working port. The valve body has a second working port connected to the valve hole on a plane where the axis of the first working port is perpendicular to the axis of the valve stem. The valve stem switches between the first working port and the second working port as the working state by rotating within the valve hole. The design of two working ports allows the rotary transposition multi-way valve to control two cylinders with a single control valve. The operator can switch the working state of the first working port and the second working port by rotating the valve stem flow channel on the valve stem and connecting it with the two working ports. When one working port is in the working state, the other working port is in the closed state.

[0005] A further option is to have three oil chambers, with the first working oil port including a first front oil port and a first rear oil port, the second working oil port including a second front oil port and a second rear oil port, and the return oil port including a first return oil port and a second return oil port, so as to meet the working requirements of two-way selective isolation control.

[0006] A further embodiment involves a valve stem flow channel comprising a first valve stem flow channel and a second valve stem flow channel. When the valve stem switches from the neutral position to other working positions, the first valve stem flow channel connects the oil inlet to either the first or second front oil port. When the valve stem switches from the neutral position to the opposite working position, the second valve stem flow channel connects the oil inlet to either the first or second rear oil port. The function of the valve stem flow channel is to construct an oil circuit. The first and second valve stem flow channels connect to different oil circuits, corresponding to the front or rear positions on either side of the neutral position in a multi-way valve. The front and rear positions control the extension or retraction of the hydraulic cylinder, respectively. When one of the front or rear positions is in a working state, the valve stem flow channel corresponding to the other position is in a closed state.

[0007] A further embodiment is that the first valve stem flow channel includes a first radial flow channel and a first axial flow channel. The first axial flow channel is an axial blind hole at one end of the valve stem, and the first radial flow channel is a through hole that radially penetrates the first axial flow channel and two intervals of the valve stem. The second valve stem flow channel includes a second radial flow channel and a second axial flow channel. The second axial flow channel is an axial blind hole at the end of the valve stem opposite to the first valve stem flow channel, and the second radial flow channel is a through hole that radially penetrates the second axial flow channel and two intervals of the valve stem. When the valve stem is in the neutral position, the through holes on the first and second radial flow channels connect to the oil chamber in the neutral position. When the multi-way valve is in the neutral position, the position of the valve stem corresponds to the oil chamber in the middle position among the three oil chambers, and at this time, the multi-way valve directly returns oil.

[0008] A further embodiment involves a fork fixedly connected to one end of the valve stem, with a control lever hinged to the end of the fork furthest from the valve stem. The control lever is connected perpendicular to the axial direction of the valve stem. The valve stem is rotated by rotating the fork via the control lever. The perpendicularity of the control lever to the valve stem creates a lever, making it easier to rotate the valve stem.

[0009] A further embodiment involves a control bracket connected to the valve body on the same side as the control lever. One end of the control lever has a ball head, and the control bracket contains an arc-shaped groove. An I-shaped baffle is connected to the control bracket, and the I-shaped baffle has I-shaped grooves corresponding to the positions and strokes of the first and second oil inlets. The control lever body passes through the I-shaped groove, and the ball head is positioned within the arc-shaped groove and can slide within it. The control lever rotates around a fork as a fulcrum. The ball head, in conjunction with the arc-shaped groove, restricts the rotation trajectory of the control lever, increasing its stability. The control lever body moves back and forth within the I-shaped groove. The I-shaped groove not only effectively ensures the formation of the control lever but also provides visual guidance for the operator. The short vertical position in the middle of the I-shaped groove is in the neutral position, where the control lever switches the corresponding working cylinder. The two long horizontal sections above and below the I-shaped groove correspond to different working positions of the multi-way valve.

[0010] A further embodiment includes an outer casing on the side of the control bracket connected to the valve body, which surrounds one end of the valve stem. A valve stem positioning sleeve is positioned between the valve stem and the outer casing, closely fitting the valve stem. The valve stem positioning sleeve has a shallow ball groove on its inner wall near the valve body. A positioning plug is fixedly connected to the flow channel on the valve stem side of the shift fork. The positioning plug has a positioning hole near the shift fork. A positioning cone is positioned between the positioning plug and the shift fork, with a positioning pin on the cone that mates with the positioning hole. A positioning spring is positioned between the cone and the fork. A ball bearing hole is positioned between the valve stem and the positioning cone, with a positioning ball bearing matching its diameter inside. When the valve switches between operating positions, the valve stem is positioned by the engagement between the positioning ball bearing and the shallow ball groove. The positioning ball bearing is compressed into the shallow ball groove by the axial thrust of the positioning spring against the cone.

[0011] A further embodiment involves a straight oil plug connected to the flow channel at the opposite end of the valve stem from the fork. A rear end cap is connected to the valve body on one side of the straight oil plug. A pressure plate is positioned between the rear end cap and the valve body, with a hole on the pressure plate to accommodate the valve stem. A spring seat is located on the side of the pressure plate near the rear end cap, and the spring seat is fitted onto the valve stem. A shoulder is located on the outer ring of the valve stem on the side of the straight oil plug. A frame is mounted on the spring seat and fitted between the spring seat and the rear end cap. The pressure of the return spring is transmitted through the frame on the spring seat to the shoulder, which is positioned on the valve stem, thus creating a thrust on the valve stem. This thrust helps the positioning ball, which is pressed into the shallow ball groove, to dislodge more easily, making the forward and backward swinging control lever easier.

[0012] The rotary multi-way valve designed in this invention, based on the original three-position five-way valve, has a second working port that is also connected to the valve hole, set on a plane where the axis of the working port of the valve body is perpendicular to the axis of the valve stem. The valve stem is rotated by a control lever to switch the connection of different working ports. Different cylinders are then connected to different working ports to achieve the function of controlling two working cylinders with one control valve. Furthermore, by controlling the size of different working ports, the flow rate of hydraulic oil through the working ports can be changed, thereby realizing the function of one control valve outputting different power by switching the control lever. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the hydraulic working principle of Example 1;

[0014] Figure 2 This is an isometric view of Example 1;

[0015] Figure 3 yes Figure 2 Another angle of the isometric view;

[0016] Figure 4 yes Figure 2 Vertical cross-sectional view;

[0017] Figure 5 yes Figure 2 Horizontal cross-section;

[0018] Figure 6 This is a schematic diagram of the valve body in Example 1;

[0019] Figure 7 yes Figure 6 Structural cross-sectional view;

[0020] Figure 8 This is a schematic diagram of the valve stem structure in Example 1;

[0021] Figure 9 yes Figure 8 Structural cross-sectional view;

[0022] Figure 10 This is an operational diagram of Example 1;

[0023] Figure 11 This is a schematic diagram of the switching between different working oil ports in Example 1. Detailed Implementation

[0024] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structure, features and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0025] Example 1.

[0026] like Figure 1-5 As shown, the rotary switching multi-way valve described in this embodiment includes a valve body 1 and a valve stem 2. The valve body 1 has multiple oil chambers 11, valve holes 12 connecting the multiple oil chambers 11, and oil inlet P, oil return T, and working oil port AB connected to the corresponding oil chambers 11. The valve stem 2 has a valve stem flow channel 21, and the valve stem 2 can move and rotate axially within the valve hole 12 to conduct or cut off the corresponding oil chambers 11, thereby enabling the rotary switching multi-way valve to switch between different working positions. The working position of the rotary switching multi-way valve includes a neutral position, in which the hydraulic oil of the rotary switching multi-way valve can return. The working oil port AB includes a first working oil port and a second working oil port. The valve body 1 has a second working oil port connected to the valve hole 12 on a plane where the axis of the first working oil port is perpendicular to the axis of the valve stem 2, and the valve stem 2 switches between the first working oil port and the second working oil port as the working state by rotating back and forth within the valve hole 12.

[0027] like Figure 6 , Figure 7As shown, the number of oil chambers 11 is three. The first working oil port includes a first front oil port A1 and a first rear oil port B1. The second working oil port includes a second front oil port A2 and a second rear oil port B2. The return oil port T includes a first return oil port T1 and a second return oil port T2.

[0028] like Figure 7 , Figure 8 , Figure 9 As shown, the valve stem flow channel 21 includes a first valve stem flow channel 211 and a second valve stem flow channel 212. When the valve stem 2 switches from the neutral position to other working positions, the first valve stem flow channel 211 connects the oil inlet P and the first front oil port A1 or the second front oil port A2. When the valve stem 2 switches from the neutral position to the working position opposite to the aforementioned working position, the second valve stem flow channel 212 connects the oil inlet P and the first rear oil port B1 or the second rear oil port B2. The first valve stem flow channel 211 includes a first radial flow channel 211a and a first axial flow channel 211b. The first axial flow channel 211b is an axial blind hole at one end of the valve stem 2, and the first radial flow channel 211a is a through hole that radially penetrates the first axial flow channel 211b and two intervals of the valve stem 2. The second valve stem flow channel 212 includes a second radial flow channel 212a and a second axial flow channel 212b. The second axial flow channel 212b is an axial blind hole at the end of the valve stem 2 opposite to the first valve stem flow channel 211, and the second radial flow channel 212a is a through hole that radially penetrates the second axial flow channel 212b and two intervals of the valve stem. When the valve stem 2 is in the neutral position, the through holes on the first radial flow channel 211a and the second radial flow channel 212a are connected to the oil chamber 11 in the neutral position.

[0029] like Figure 4 , Figure 5 , Figure 10 and Figure 11 As shown, a fork 3 is fixedly connected to one end of the valve stem 2. A control lever 4 is hinged to the end of the fork 3 away from the valve stem 2. The control lever 4 is connected perpendicular to the axial direction of the valve stem 2. A control bracket 5 is connected to the valve body 1 on the same side as the control lever 4. A ball head 41 is provided at one end of the control lever 4. An arc-shaped groove 51 is provided inside the control bracket 5. An I-shaped baffle 6 is connected to the control bracket 5. The I-shaped baffle 6 is provided with an I-shaped groove 61 corresponding to the position and stroke of the first oil inlet P and the second oil inlet P. The rod body of the control lever 4 passes through the I-shaped groove 61, and the ball head 41 is located in the arc-shaped groove 51 and can slide in the arc-shaped groove 51.

[0030] like Figure 4 , Figure 5As shown, the control bracket 5 has a housing part 52 on the side connected to the valve body 1. The housing part 52 surrounds and accommodates one end of the valve stem 2. A valve stem positioning sleeve 71 is provided between the valve stem 2 and the housing part 52, which is in close contact with the valve stem 2. The valve stem positioning sleeve 71 has a shallow ball groove 711 on its inner wall near the valve body 1. A positioning oil plug 72 is fixedly connected to the flow channel on the side of the valve stem 2 and the shift fork 3. The positioning oil plug 72 has a positioning hole 74 at the end near the shift fork 3. A positioning cone 73 is provided between the positioning oil plug 72 and the shift fork 3. A positioning pin 75 that cooperates with the positioning hole 74 is provided on the positioning cone 73. A positioning spring 76 is provided between the positioning cone 73 and the shift fork 3. A ball hole 22 is provided between the valve stem 2 and the positioning cone 73 and the positioning oil plug 72. A positioning ball 77 that is in contact with the diameter of the ball hole 22 is provided in the ball hole 22.

[0031] like Figure 4 , Figure 5 As shown, the valve stem 2 is connected to a straight oil plug 81 in the flow channel at the opposite end of the shift fork 3. The valve body 1 is connected to a rear end cover 8 on one side of the straight oil plug 81. A pressure plate 82 is provided between the rear end cover 8 and the valve body 1. The pressure plate 82 has a hole for accommodating the valve stem 2. A spring seat 83 is provided on the side of the pressure plate 82 near the rear end cover 8. The spring seat 83 is sleeved on the valve stem 2. A shoulder 84 is provided on the outer ring of the valve stem 2 on the side of the straight oil plug 81. A frame 85 is provided on the spring seat 83 and mounted on the shoulder 84. A return spring 86 is sleeved between the spring seat 83 and the rear end cover 8.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. 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 should be able to make equivalent embodiments by making some changes or modifications to the above-disclosed technical content without departing from the scope of the present invention. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A rotary switching multi-way valve, comprising a valve body (1) and a valve stem (2), wherein the valve body (1) has a plurality of oil chambers (11), a valve hole (12) communicating with the plurality of oil chambers (11), and an oil inlet (P), an oil return port (T), and a working oil port (AB) communicating with the corresponding oil chambers (11); wherein the valve stem (2) is provided with a valve stem flow channel (21), and the valve stem (2) can move axially and rotate within the valve hole (12) to conduct or cut off the corresponding oil chambers (11), thereby enabling the rotary switching multi-way valve to switch between different working positions, wherein the working position of the rotary switching multi-way valve includes a neutral position, in which the hydraulic oil of the rotary switching multi-way valve can return; characterized in that, The working port (AB) includes a first working port and a second working port. The valve body (1) is provided with a second working port that is also connected to the valve hole (12) on a plane where the axis of the first working port is perpendicular to the axis of the valve stem (2). The valve stem (2) switches between the first working port and the second working port as working state by rotating in the valve hole (12). The number of oil chambers (11) is three. The first working oil port includes a first front oil port (A1) and a first rear oil port (B1). The second working oil port includes a second front oil port (A2) and a second rear oil port (B2). The return oil port (T) includes a first return oil port (T1) and a second return oil port (T2). The valve stem flow channel (21) includes a first valve stem flow channel (211) and a second valve stem flow channel (212). When the valve stem (2) switches from the middle position to other working positions, the first valve stem flow channel (211) is connected to the oil inlet (P) and the first front oil port (A1) or the second front oil port (A2). When the valve stem (2) switches from the middle position to the working position opposite to the aforementioned working position, the second valve stem flow channel (212) is connected to the oil inlet (P) and the first rear oil port (B1) or the second rear oil port (B2). The first valve stem flow channel (211) includes a first radial flow channel (211a) and a first axial flow channel (211b). The first axial flow channel (211b) is an axial blind hole at one end of the valve stem (2), and the first radial flow channel (211a) is a through hole that radially penetrates the first axial flow channel (211b) and the valve stem (2) at two intervals. The second valve stem flow channel (212) includes a second radial flow channel (212a) and a second axial flow channel (212b). The second axial flow channel (212b) is an axial blind hole at the end of the valve stem (2) opposite to the first valve stem flow channel (211), and the second radial flow channel (212a) is a through hole that radially penetrates the second axial flow channel (212b) and the valve stem at two intervals. When the valve stem (2) is in the neutral position, the first radial flow channel (211a) and the second radial flow channel (212a) are... The through hole on the top connects to the oil cavity (11) in the middle position; The first valve stem flow channel (211) and the second valve stem flow channel (212) are connected to different oil circuits, respectively corresponding to the front or rear positions on both sides of the middle position in the working position of the multi-way valve. The front and rear positions control the cylinder to push out or retract, and when one of the front and rear positions is in the working state, the valve stem flow channel corresponding to the other is in the closed state.

2. The rotary transposition multi-way valve according to claim 1, characterized in that, One end of the valve stem (2) is fixedly connected to a fork (3), and the fork (3) is hinged to a lever (4) at the end away from the valve stem (2). The lever (4) is connected perpendicular to the axial direction of the valve stem (2).

3. The rotary transposition multi-way valve according to claim 2, characterized in that, The valve body (1) is connected to a control bracket (5) on the same side as the control lever (4). One end of the control lever (4) is provided with a ball head (41). The control bracket (5) is provided with an arc groove (51). An I-shaped baffle (6) is connected to the control bracket (5). The I-shaped baffle (6) is provided with an I-shaped groove (61) corresponding to the position and stroke of the first oil inlet (P) and the second oil inlet (P). The rod of the control lever (4) passes through the I-shaped groove (61), and the ball head (41) is set in the arc groove (51) and can slide in the arc groove (51).

4. The rotary transposition multi-way valve according to claim 3, characterized in that, The control bracket (5) has an outer shell (52) on the side connected to the valve body (1). The outer shell (52) surrounds and accommodates one end of the valve stem (2). A valve stem positioning sleeve (71) is provided between the valve stem (2) and the outer shell (52), which is in close contact with the valve stem (2). The valve stem positioning sleeve (71) has a shallow ball groove (711) on its inner wall near the valve body (1). A positioning oil plug (72) is fixedly connected to the valve stem (2) in the flow channel on the side of the shift fork (3). The positioning oil plug (72) has a positioning hole (74) at the end near the shift fork (3). A positioning cone (73) is provided between the positioning oil plug (72) and the shift fork (3). A positioning pin (75) that mates with the positioning hole (74) is provided on the positioning cone (73). A positioning spring (76) is provided between the positioning cone (73) and the shift fork (3). A ball hole (22) is provided between the positioning cone (73) and the positioning oil plug (72), and a positioning ball (77) that matches its diameter is provided in the ball hole (22).

5. The rotary transposition multi-way valve according to claim 4, characterized in that, The valve stem (2) is connected to a straight oil plug (81) in the flow channel at the opposite end of the fork (3). The valve body (1) is connected to a rear end cover (8) on one side of the straight oil plug (81). A pressure plate (82) is provided between the rear end cover (8) and the valve body (1). The pressure plate (82) has a hole for accommodating the valve stem (2). The pressure plate (82) has a spring seat (83) on the side near the rear end cover (8). The spring seat (83) is sleeved on the valve stem (2). The valve stem (2) has a shoulder (84) on the outer ring on the side of the straight oil plug (81). The spring seat (83) has a frame (85) mounted on the shoulder (84). A return spring (86) is sleeved between the spring seat (83) and the rear end cover (8).

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