Valve-bush-free oil way control valve

Abstract

The utility model discloses a valve-bush-free oil way control valve which comprises a shell, a valve plug and a spring, a coil assembly, a front yoke, an armature and an ejector rod are installed in the shell, one end of the front yoke extends out of the shell and is provided with a movable groove, the portion, located in the shell, of the front yoke is provided with a central through hole, the valve plug is located in the movable groove, one end of the ejector rod is fixedly connected with the front yoke, and the other end of the ejector rod is fixedly connected with the armature. The front yoke is provided with an oil inlet and an oil outlet, one end of the valve plug is fixedly connected with a connecting portion, the connecting portion is connected with an outer plug head, and one end of the spring is fixedly connected with the outer plug head. According to the oil way control valve without the valve sleeve, the oil way control valve of a novel structure is provided, the design of the valve sleeve is omitted, cost is reduced, and the oil way control valve without the valve sleeve can adapt to special installation and use environments.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil circuit control valves, and in particular relates to an oil circuit control valve without a valve sleeve. Background Art

[0002] The oil circuit control valve is used to control the opening and closing of the oil circuit. The existing oil circuit control valve generally includes a housing, a coil assembly, a front yoke, an armature, a push rod, a valve sleeve, a valve plug and other structures. By energizing the coil assembly, the front yoke generates magnetism and attracts the armature, thereby driving the valve plug to move and realize the control of the oil circuit. The oil circuit control valve of this structure requires the valve sleeve and the valve plug to cooperate. The valve sleeve has a certain length and needs to be connected to the housing. The overall structure of the oil circuit control valve is relatively complex, and it is necessary to consider the difficulty of assembly and to carry out oil leakage prevention design. Utility Model Content

[0003] In order to solve the above technical problems, the technical solution adopted by the utility model is: a valve sleeve-free oil circuit control valve, including a shell, a valve plug, and a spring. A coil assembly, a front yoke, an armature and a push rod are installed in the shell. An active cavity for the armature to move is provided in the shell. After the coil assembly is energized, the front yoke generates magnetism for attracting the armature. One end of the front yoke extends out of the shell and is provided with a movable groove. The part of the front yoke located inside the shell is provided with a central through hole for the push rod to move through. The active cavity and the active groove are connected through the central through hole. The valve plug is located in the active groove. One end of the push rod is fixedly connected to the front yoke, and the other end After passing through the central through hole, it extends into the movable groove and is fixedly connected to the valve plug. An oil inlet is provided on one end of the front yoke iron located outside the shell body, and an oil outlet is provided on one side of the front yoke iron located outside the shell body. The oil inlet and the oil outlet are respectively connected to the movable groove. One end of the valve plug is fixedly connected with a connecting part, and the connecting part is fixedly connected with an outer plug head after passing through the oil outlet. The diameter of the outer plug head is larger than the diameter of the oil outlet, and the diameter of the connecting part is smaller than the inner diameter of the oil outlet and the inner diameter of the movable groove. The valve plug and the movable groove cooperate to form a piston structure. One end of the spring is fixedly connected to the outer plug head, and the spring, valve plug, push rod and armature are coaxially arranged.

[0004] As a preferred embodiment of the above technical solution, an annular groove is provided on the outer plug, and one end of the spring is tightly sleeved in the annular groove.

[0005] As a preferred embodiment of the above technical solution, the number of the oil inlets is at least two.

[0006] As a preferred embodiment of the above technical solution, a portion of the front yoke iron located outside the shell is provided with a retaining spring, one end of the retaining spring is inserted into one of the oil inlets and extends to a position between the outer plug head and the valve plug, the other end of the retaining spring is inserted into another oil inlet and extends to a position between the outer plug head and the valve plug, and a plurality of bending portions are provided on the retaining spring, the bending portions corresponding to the remaining oil inlets, the bending portions are inserted into the corresponding oil inlets and extend to a position between the outer plug head and the valve plug.

[0007] As a preferred embodiment of the above technical solution, oil chambers are respectively provided inside the valve plug, inside the connecting part and inside the outer plug head, and the oil chambers are interconnected. An oil port connected to the oil chamber is provided on the outer plug head, and an oil hole is provided on the end of the valve plug connected to the push rod, and the oil hole is connected to the oil chamber.

[0008] As a preferred embodiment of the above technical solution, a magnetic isolation sleeve is provided in the shell, one end of the magnetic isolation sleeve is provided with an opening for the front yoke to extend into, and the other end is provided with a sealing plate. After one end of the front yoke extends into the magnetic isolation sleeve, a first sealing ring is provided between the magnetic isolation sleeve and the magnetic isolation sleeve.

[0009] The beneficial effects of the utility model are as follows: the valve sleeve-free oil circuit control valve of the utility model provides an oil circuit control valve with a new structure, which saves the design of the valve sleeve, reduces the cost, and can adapt to special installation and use environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 It is a structural diagram of the circlip. DETAILED DESCRIPTION

[0012] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0013] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0014] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0015] like Figure 1-2 As shown, the valve sleeve-free oil circuit control valve includes a housing 1, a valve plug 2, and a spring 3. A coil assembly 4, a front yoke 5, an armature 6, and a push rod 7 are installed in the housing 1. An active cavity 8 for the armature 6 to move is provided in the housing 1. After the coil assembly 4 is energized, the front yoke 5 generates magnetism for attracting the armature 6. One end of the front yoke 5 extends out of the housing 1 and is provided with a movable groove 9. The part of the front yoke 5 located inside the housing 1 is provided with a central through hole 10 for the push rod 7 to move through. The active cavity 8 and the active groove 9 are connected through the central through hole 10. The valve plug 2 is located in the active groove 9. One end of the push rod 7 is fixedly connected to the front yoke 5, and the other end passes through the central through hole 10 and then extends into the active groove 9. The valve plug 2 is fixedly connected, an oil inlet 11 is provided on one end of the front yoke 5 outside the housing 1, and an oil outlet 12 is provided on one side of the front yoke 5 outside the housing 1. The oil inlet 11 and the oil outlet 12 are respectively connected to the movable groove 9. A connecting portion 13 is fixedly connected to one end of the valve plug 2. The connecting portion 13 passes through the oil outlet 12 and is fixedly connected to an outer plug 14. The diameter of the outer plug 14 is larger than the diameter of the oil outlet 12, and the diameter of the connecting portion 13 is smaller than the inner diameter of the oil outlet 12 and the inner diameter of the movable groove 9. The valve plug 2 cooperates with the movable groove 9 to form a piston structure. One end of the spring 3 is fixedly connected to the outer plug 14. The spring 3, valve plug 2, push rod 7, and armature 6 are coaxially arranged. When the coil assembly 4 is not energized, the spring 3 presses against the outer plug 14, and the outer plug 14 blocks the oil outlet 12. When the coil assembly 4 is energized, the front yoke 5 generates magnetism and attracts the armature 6, causing the armature 6 to move, driving the valve plug 2 to move, the outer plug head 14 to move, compressing the spring 3, and connecting the oil outlet 12 and the oil inlet 11.

[0016] Furthermore, an annular groove is provided on the outer plug 14, and one end of the spring 3 is tightly sleeved in the annular groove.

[0017] Furthermore, the number of the oil inlets 11 is at least two.

[0018] Furthermore, a circlip 15 is provided on the portion of the front yoke 5 outside the housing 1, one end of the circlip 15 is inserted into one of the oil inlets 11 and extends into the position between the outer plug 14 and the valve plug 2, the other end of the circlip 15 is inserted into another oil inlet 11 and extends into the position between the outer plug 14 and the valve plug 2, and a plurality of bending portions 16 are provided on the circlip 15, the bending portions 16 correspond to the remaining oil inlets 11, and the bending portions 16 are inserted into the corresponding oil inlets 11 and extend into the position between the outer plug 14 and the valve plug 2. The movement of the valve plug 2 is limited by the circlip 15, and the valve plug 2 can be locked without using a valve sleeve.

[0019] Furthermore, the valve plug 2, the connecting portion 13, and the outer plug head 14 are respectively provided with oil chambers 17, which are interconnected. The outer plug head 14 is provided with an oil port 18 connected to the oil chamber 17, and the end of the valve plug 2 connected to the push rod 7 is provided with an oil hole 19, which is connected to the oil chamber 17. Due to the sealing reason, the oil will inevitably enter the movable groove 9, but the amount of oil passing between the valve plug 2 and the groove wall of the movable groove 9 is small, so that a pressure difference will appear at the front and rear ends of the valve plug 2 during the movement, affecting the response speed of the control valve. Through the oil port 18, the oil chamber 17, and the oil hole 19, the oil can quickly enter the movable groove 9, so that the pressure difference at the front and rear ends of the valve plug 2 during the movement can be greatly reduced.

[0020] Furthermore, a magnetic isolation sleeve 20 is provided in the housing 1, one end of the magnetic isolation sleeve 20 is provided with an opening 23 for the front yoke 5 to extend into, and the other end is provided with a sealing plate 21, and a first sealing ring 22 is provided between one end of the front yoke 5 and the magnetic isolation sleeve 20 after the end of the front yoke 5 extends into the magnetic isolation sleeve 20. The magnetic isolation sleeve 20 plays a magnetic isolation role, and can also play a sealing role to prevent oil leakage.

[0021] It is worth mentioning that the technical features such as the coil assembly involved in this utility model patent application should be regarded as the prior art. The specific structure, working principle and possible control method and spatial arrangement method of these technical features can be selected by conventional methods in the field and should not be regarded as the invention point of this utility model patent. This utility model patent will not be further elaborated.

[0022] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field through logical analysis, reasoning or limited experiments based on the concept of the utility model on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. The oil circuit control valve without valve sleeve is characterized by: The invention comprises a shell, a valve plug and a spring. A coil assembly, a front yoke, an armature and a push rod are installed in the shell. An active cavity for the armature to move is provided in the shell. When the coil assembly is energized, the front yoke generates magnetism for attracting the armature. One end of the front yoke extends out of the shell and is provided with an active groove. The part of the front yoke located inside the shell is provided with a central through hole for the push rod to move through. The active cavity and the active groove are connected through the central through hole. The valve plug is located in the active groove. One end of the push rod is fixedly connected to the front yoke, and the other end extends into the active groove after passing through the central through hole and is fixed. A fixedly connected valve plug, an oil inlet is provided on one end of the front yoke iron located outside the shell, an oil outlet is provided on one side of the front yoke iron located outside the shell, the oil inlet and the oil outlet are respectively connected to the movable groove, one end of the valve plug is fixedly connected to a connecting part, the connecting part is fixedly connected to an outer plug head after passing through the oil outlet, the diameter of the outer plug head is larger than the diameter of the oil outlet, the diameter of the connecting part is smaller than the inner diameter of the oil outlet and the inner diameter of the movable groove, the valve plug and the movable groove cooperate to form a piston structure, one end of the spring is fixedly connected to the outer plug head, and the spring, valve plug, push rod and armature are coaxially arranged.

2. The sleeveless oil circuit control valve according to claim 1, characterized in that: The outer plug is provided with an annular groove, and one end of the spring is tightly sleeved in the annular groove.

3. The sleeveless oil circuit control valve according to claim 1, characterized in that: The number of the oil inlets is at least two.

4. The sleeveless oil circuit control valve according to claim 3, characterized in that: A retaining spring is provided on the portion of the front yoke iron located outside the shell, one end of the retaining spring is inserted into one of the oil inlets and extends into a position between the outer plug head and the valve plug, the other end of the retaining spring is inserted into another oil inlet and extends into a position between the outer plug head and the valve plug, and a plurality of bending portions are provided on the retaining spring, the bending portions corresponding to the remaining oil inlets, the bending portions are inserted into the corresponding oil inlets and extend into a position between the outer plug head and the valve plug.

5. The sleeveless oil circuit control valve according to claim 1, characterized in that: The valve plug, the connecting part and the outer plug head are respectively provided with oil passage chambers, which are interconnected. The outer plug head is provided with an oil passage port connected to the oil chamber. The end of the valve plug connected to the push rod is provided with an oil hole, which is connected to the oil chamber.

6. The sleeveless oil circuit control valve according to claim 5, characterized in that: A magnetic isolation sleeve is arranged in the shell, one end of the magnetic isolation sleeve is provided with an opening for the front yoke to extend into, and the other end is provided with a sealing plate. After one end of the front yoke extends into the magnetic isolation sleeve, a first sealing ring is arranged between the magnetic isolation sleeve and the magnetic isolation sleeve.

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