Hydraulic solenoid valve

Abstract

The utility model provides a kind of hydraulic electromagnetic valve, belong to mechanical technical field.It solves the problem of existing electromagnetic valve assembly inconvenience.The present hydraulic electromagnetic valve includes valve body and the electromagnetic assembly being set on the upper portion of valve body, and the upper portion of valve body is connecting seat, and the electromagnetic assembly includes the shell of cylinder, the core assembly being set in shell and the coil being set between shell and core assembly, and the core assembly includes the static core of cylinder, and the lower end of static core is pressed on connecting seat and both are fixed by a circle bolt, and the upper end of static core is fixed with pressure cap outside, and the lower end of shell has annular locating seat on inner wall, and top wall and locating seat are respectively pressed on pressure cap and static core, and the head of bolt shell is set downward, and locating hole matched with bolt stem is set on the bottom wall of locating seat, and the number of locating hole is at least one, and the stem upper end of at least one bolt passes through static core and inserts into one locating hole.The present hydraulic electromagnetic valve is convenient to assemble.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to an electromagnetic valve, particularly a hydraulic electromagnetic valve. Background Technology

[0002] Hydraulic solenoid valves are key control components in hydraulic systems. They use electromagnetic force to drive the valve core to move, thereby controlling the direction, pressure, or flow of hydraulic oil.

[0003] An existing hydraulic solenoid valve, such as the one disclosed in the Chinese Patent Database (application number: 201610884694.9), includes an electromagnetic assembly, a valve body, a valve sleeve, a valve core, and rubber rings. The valve body has a through hole, the valve sleeve is disposed within the through hole, and the valve core is disposed within the valve sleeve. Electromagnetic assemblies are located at both ends of the through hole, and these assemblies control the movement of the valve core within the valve sleeve. Rubber rings are located at both ends of the valve sleeve, and springs that compress the rubber rings are disposed between the rubber rings and the electromagnetic assemblies. The electromagnetic assembly includes an end cap, a guide sleeve, a magnetic shielding ring, and a coil. The valve comprises a magnetic conductor, a nut, a tailstock, an armature, and a push rod. The magnetic conductor and the guide sleeve are cylindrical with the same diameter and are coaxially arranged. One end of the magnetic conductor is fixed to the valve body. A magnetic isolation ring is provided between the magnetic conductor and the guide sleeve. The coil is sleeved on the magnetic conductor and the guide sleeve. A housing is sleeved on the outside of the coil. End caps are provided at both ends of the housing. One end of the guide sleeve extends beyond the end caps. The tailstock is fixed to the extended portion of the guide sleeve by the nut. The armature is provided inside the guide sleeve. The armature is connected to the valve core through the push rod.

[0004] In the aforementioned hydraulic solenoid valve, the outer casing at the end cap is positioned by tightening with a nut. However, in actual products, the outer casing is not restricted in the circumferential direction. During the screwing in of the nut, the end cap is very prone to deflection, causing the wire outlet hole of the outer casing to be misaligned with the coil outlet position, resulting in the wire led out from the coil being compressed. At this time, it is necessary to readjust the position of the outer casing, which involves many steps and is quite cumbersome. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a hydraulic solenoid valve that is easy to assemble.

[0006] The objective of this utility model can be achieved through the following technical solution: A hydraulic solenoid valve includes a valve body and an electromagnetic component disposed above the valve body. The upper part of the valve body is a connecting seat. The electromagnetic component includes a cylindrical outer shell, an iron core assembly disposed inside the outer shell, and a coil disposed between the outer shell and the iron core assembly. The iron core assembly includes a cylindrical stationary iron core. The lower end of the stationary iron core presses against the connecting seat and the two are fixed together by a ring of bolts. A pressure cap is fixed to the upper end of the stationary iron core. An annular positioning seat is provided on the inner wall of the lower end of the outer shell. The top wall of the outer shell and the positioning seat are respectively pressed against the pressure cap and the stationary iron core. The characteristic is that the head of the bolt is set downward. A positioning hole matching the bolt shank is opened on the bottom wall of the positioning seat. There is at least one positioning hole, and the upper end of the shank of at least one bolt passes through the stationary iron core and is inserted into one of the positioning holes.

[0007] The outer shell is positioned circumferentially by using bolts and positioning holes to prevent it from rotating when the cap is screwed in, thus avoiding subsequent reset and adjustment steps and making the entire assembly process smoother and more convenient.

[0008] The bolts are used to connect the electromagnetic components and the valve body, and also cooperate with the positioning holes to limit the outer shell. In this application, the bolts have a dual function, which simplifies the structure and further facilitates assembly.

[0009] In the aforementioned hydraulic solenoid valve, the number of positioning holes and bolts are the same and their positions correspond one-to-one, thereby reducing the requirements for the circumferential position of the positioning seat and making assembly more convenient.

[0010] In the aforementioned hydraulic solenoid valve, the diameter of the positioning hole is slightly larger than the outer diameter of the bolt shank. The positioning hole includes two limiting surfaces distributed circumferentially along the positioning seat, and the bolt shank extending into the positioning hole is positioned between the corresponding two limiting surfaces. During use, the rotation of the housing is restricted by the contact between the limiting surfaces and the bolt shank.

[0011] During actual assembly, a slight deflection of the outer casing does not affect the coil output. Furthermore, the diameter of the positioning hole is slightly larger than the outer diameter of the bolt shank, which makes it easier for the bolt shank to enter the positioning hole, further facilitating assembly.

[0012] In the aforementioned hydraulic solenoid valve, the positioning hole is through-hole.

[0013] In the aforementioned hydraulic solenoid valve, the positioning hole is opened on the side near the inner hole of the positioning seat to release the stress during the machining of the positioning hole and ensure the overall strength and stability of the positioning seat.

[0014] In the aforementioned hydraulic solenoid valve, the core assembly also includes a guide rod that slides up and down within the stationary core. The upper end of the guide rod passes through the pressure cap, and the lower end of the guide rod is supported by a spring located within the stationary core. A sealing ring forms a seal between the upper end of the guide rod and the pressure cap to cover the upper port of the pressure cap and prevent dust and other impurities from entering the housing.

[0015] In the aforementioned hydraulic solenoid valve, a raised ring is formed on the top wall of the pressure cap. This raised ring fits over the guide rod, with the top surface of the raised ring higher than the top surface of the guide rod. This design completely conceals the upper end of the guide rod outside the raised ring, preventing accidental contact and ensuring stable operation of the solenoid valve.

[0016] In the aforementioned hydraulic solenoid valve, the vertical distance between the top surface of the convex ring and the top surface of the guide rod is 0.5mm to 1mm. This distance ensures collision protection without hindering manual pressing of the guide rod, facilitating operation.

[0017] In the aforementioned hydraulic solenoid valve, a rubber sleeve is also provided inside the convex ring. The top of the rubber sleeve is closed and the bottom is open. The rubber sleeve is fixed to the pressure cap, and the upper end of the guide rod is located inside the rubber sleeve, with the upper part of the rubber sleeve extending out of the convex ring. The rubber sleeve not only further protects the guide rod but also replaces the guide rod in contact with the operator's hand, enhancing the user experience.

[0018] In the aforementioned hydraulic solenoid valve, a support ring coaxial with the pressure cap is formed on the top wall of the pressure cap, and the support ring is sleeved outside the guide rod. The lower end of the rubber sleeve is sleeved and fixed outside the support ring, and the inner and outer walls of the aforementioned sealing ring contact and seal with the guide rod and the inner wall of the support ring, respectively.

[0019] Compared with existing technologies, this hydraulic solenoid valve has the following advantages:

[0020] 1. The outer shell is positioned in the circumferential direction by using bolts and positioning holes to prevent it from rotating when the cap is screwed in, thus avoiding subsequent reset and adjustment steps and making the entire assembly process smoother and more convenient.

[0021] 2. The bolts are used to connect the electromagnetic components and the valve body, and also cooperate with the positioning holes to limit the outer shell. In this application, the bolts have a dual function, which simplifies the structure and further facilitates assembly.

[0022] 3. A raised ring is formed on the top wall of the pressure cap. The raised ring is fitted over the guide rod, and the top surface of the raised ring is higher than the top surface of the guide rod, so that the upper end of the guide rod is completely hidden outside the raised ring to prevent accidental contact and ensure stable operation of the solenoid valve. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the hydraulic solenoid valve.

[0024] Figure 2 This is a cross-sectional schematic diagram of the hydraulic solenoid valve.

[0025] Figure 3 This is a schematic diagram showing the connection between the positioning seat, the stationary iron core, and the connecting seat.

[0026] Figure 4 This is a schematic diagram of the positioning seat.

[0027] In the diagram, 1 is the valve body; 1a is the connecting seat; 2 is the outer shell; 2a is the positioning seat; 2b is the positioning hole; 2b1 is the limiting surface; 3 is the coil; 4 is the stationary iron core; 5 is the bolt; 6 is the pressure cap; 6a is the convex ring; 6b is the support ring; 7 is the rubber ring; 8 is the guide rod; 9 is the moving iron core; 10 is the spring; 11 is the sealing ring; and 12 is the rubber sleeve. Detailed Implementation

[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0029] like Figure 1 As shown, this hydraulic solenoid valve includes a valve body 1 and an electromagnetic assembly disposed above the valve body 1. The internal structure of the valve body 1 is existing and will not be described in detail here.

[0030] Specifically

[0031] like Figure 2 As shown, the upper part of the valve body 1 is a connecting seat 1a; the electromagnetic assembly includes a cylindrical outer shell 2, an iron core assembly disposed inside the outer shell 2, and a coil 3 disposed between the outer shell 2 and the iron core assembly. The iron core assembly includes a cylindrical stationary iron core 4, the lower end of which presses against the connecting seat 1a and the two are fixed together by a ring of bolts 5. A pressure cap 6 is fixed to the upper end of the stationary iron core 4, and an annular positioning seat 2a is provided on the inner wall of the lower end of the outer shell 2. The positioning seat 2a and the outer shell 2 are coaxially arranged, and the top wall of the outer shell 2 and the positioning seat 2a are respectively pressed against the pressure cap 6 and the stationary iron core 4, thereby stably positioning the outer shell 2. In the actual product, the positioning seat 2a and the outer shell 2 are separate structures, and they can be welded, bonded or tightly fitted together; the pressure cap 6 is threaded to the stationary iron core 4; rubber rings 7 are provided at the contact points of the pressure cap 6 and the outer shell 2, the contact points of the positioning seat 2a and the stationary iron core 4, and the contact points of the stationary iron core 4 and the connecting seat 1a, so as to achieve sealing at the above three contact points.

[0032] The bolt 5 is installed vertically with its head facing downwards. A through hole is vertically inserted into the connecting seat 1a, and a corresponding threaded hole is provided on the stationary iron core 4. The number of through holes, bolts 5, and threaded holes are equal, and their positions correspond one-to-one. The shank of the bolt 5 passes through the through hole and is screwed into the corresponding threaded hole, with the head of the bolt 5 pressing firmly against the connecting seat 1a, thereby stably connecting the stationary iron core 4 and the connecting seat 1a.

[0033] like Figures 2 to 4As shown, the bottom wall of the positioning seat 2a has a positioning hole 2b that matches the shank of the bolt 5. There is at least one positioning hole 2b, and the upper end of the shank of at least one bolt 5 passes through the stationary iron core 4 and is inserted into one of the positioning holes 2b. By cooperating with the bolt 5 and the positioning hole 2b, the outer shell 2 is positioned in the circumferential direction, thereby preventing the outer shell 2 from rotating when the pressure cap 6 is screwed in, thus effectively avoiding subsequent reset and adjustment steps, making the entire assembly process smoother and more convenient.

[0034] Bolt 5 is used to connect the electromagnetic component and valve body 1, and also cooperates with the positioning hole 2b to limit the outer shell 2. That is, in this application, bolt 5 has a dual function, which simplifies the structure and further facilitates assembly.

[0035] To further explain, the number of positioning holes 2b and bolts 5 are the same and their positions correspond one-to-one, which reduces the circumferential position requirements of the positioning seat 2a and makes assembly more convenient. Preferably, only one bolt 5 passes through the stationary iron core 4 and is inserted into the corresponding positioning hole 2b, which facilitates design and assembly.

[0036] like Figure 3 and Figure 4 As shown, the diameter of the positioning hole 2b is slightly larger than the outer diameter of the bolt 5 shank. The positioning hole 2b includes two limiting surfaces 2b1 distributed circumferentially along the positioning seat 2a, and the shank of the bolt 5 extending into the positioning hole 2b is positioned between the corresponding two limiting surfaces 2b1. In use, the rotation of the outer casing 2 is restricted by the contact between the limiting surfaces 2b1 and the shank of the bolt 5.

[0037] During actual assembly, a slight deflection of the outer casing 2 does not affect the output of the coil 3. Furthermore, the diameter of the positioning hole 2b is slightly larger than the outer diameter of the bolt 5 rod, which makes it easier for the bolt 5 rod to enter the positioning hole 2b, further facilitating assembly.

[0038] Preferably, the positioning hole 2b is through-hole, with the opening on one side close to the inner hole of the positioning seat 2a, in order to release the stress during the machining of the positioning hole 2b and ensure the overall strength and stability of the positioning seat 2a.

[0039] like Figure 2 As shown, the core assembly includes a guide rod 8 that slides vertically within a stationary core 4 and a moving core 9 fixed to the guide rod 8. The upper end of the guide rod 8 passes through a pressure cap 6, and the lower end of the guide rod 8 is supported by a spring 10 located within the stationary core 4. The connecting seat 1a has a clearance hole for the lower end of the guide rod 8 to extend into the valve body 1. A sealing ring 11 forms a seal between the upper end of the guide rod 8 and the pressure cap 6 to cover the upper port of the pressure cap 6 and prevent dust and other impurities from entering the outer casing 2.

[0040] To further explain, a raised ring 6a is formed on the top wall of the pressure cap 6. The raised ring 6a fits over the guide rod 8, and the top surface of the raised ring 6a is higher than the top surface of the guide rod 8. This design completely hides the upper end of the guide rod 8 outside the raised ring 6a, preventing accidental contact and ensuring stable operation of the solenoid valve. Preferably, the raised ring 6a and the pressure cap 6 are coaxially arranged.

[0041] In actual products, the vertical distance between the top surface of the convex ring 6a and the top surface of the guide rod 8 is 0.5mm to 1mm. This distance achieves anti-collision while not hindering manual direct pressing of the guide rod 8, facilitating operation. A preferred distance is 0.8mm.

[0042] like Figure 2 As shown, a rubber sleeve 12 is also provided inside the convex ring 6a. The top of the rubber sleeve 12 is closed and the bottom is open. The rubber sleeve 12 is fixed to the pressure cap 6. The upper end of the guide rod 8 is inside the rubber sleeve 12, and the upper part of the rubber sleeve 12 extends out of the convex ring 6a. The rubber sleeve 12 not only further protects the guide rod 8, but also replaces the guide rod 8 in contact with the operator's hand, thus enhancing the user experience.

[0043] The installation method of the pressure cap 6 is as follows: a support ring 6b coaxial with the pressure cap 6 is formed on the top wall of the pressure cap 6, and the support ring 6b is sleeved on the outside of the guide rod 8. The lower end of the rubber sleeve 12 is sleeved and fixed on the outside of the support ring 6b. The inner and outer walls of the sealing ring 11 respectively contact and seal with the guide rod 8 and the inner wall of the support ring 6b. Specifically, an annular positioning groove is formed on the outer wall of the support ring 6b, and an annular buckle matching the positioning groove is formed on the inner wall of the rubber sleeve 12, and the annular buckle is engaged in the positioning groove.

[0044] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A hydraulic solenoid valve, comprising a valve body (1) and an electromagnetic assembly disposed above the valve body (1), wherein the upper part of the valve body (1) is a connecting seat (1a), the electromagnetic assembly comprises a cylindrical outer shell (2), an iron core assembly disposed within the outer shell (2), and a coil (3) disposed between the outer shell (2) and the iron core assembly, the iron core assembly comprising a cylindrical stationary iron core (4), the lower end of the stationary iron core (4) pressing against the connecting seat (1a) and the two being fixedly connected by a ring of bolts (5), a pressure cap (6) being fixed to the upper end of the stationary iron core (4), and an annular positioning seat (2a) being provided on the inner wall of the lower end of the outer shell (2), wherein the top wall of the outer shell (2) and the positioning seat (2a) are respectively pressed against the pressure cap (6) and the stationary iron core (4), characterized in that, The head of the bolt (5) is set downwards, and the bottom wall of the positioning seat (2a) is provided with a positioning hole (2b) that matches the shank of the bolt (5). There is at least one positioning hole (2b), and the upper end of the shank of at least one bolt (5) passes through the stationary iron core (4) and is inserted into one of the positioning holes (2b).

2. The hydraulic solenoid valve according to claim 1, characterized in that, The number of positioning holes (2b) and bolts (5) mentioned above are the same and their positions correspond one-to-one.

3. The hydraulic solenoid valve according to claim 1 or 2, characterized in that, The diameter of the positioning hole (2b) is slightly larger than the outer diameter of the bolt (5) shank. The positioning hole (2b) includes two limiting surfaces (2b1) distributed circumferentially along the positioning seat (2a), and the shank of the bolt (5) extending into the positioning hole (2b) is located between the corresponding two limiting surfaces (2b1).

4. The hydraulic solenoid valve according to claim 1 or 2, characterized in that, The positioning hole (2b) is through-hole.

5. The hydraulic solenoid valve according to claim 4, characterized in that, The positioning hole (2b) opens on one side near the inner hole of the positioning seat (2a).

6. The hydraulic solenoid valve according to claim 1, characterized in that, The iron core assembly also includes a guide rod (8) that slides up and down inside the stationary iron core (4). The upper end of the guide rod (8) passes through the pressure cap (6), and the lower end of the guide rod (8) is supported by a spring (10) inside the stationary iron core (4). A seal is formed between the upper end of the guide rod (8) and the pressure cap (6) by a sealing ring (11).

7. The hydraulic solenoid valve according to claim 6, characterized in that, A raised ring (6a) is formed on the top wall of the pressure cap (6). The raised ring (6a) is fitted over the guide rod (8), and the top surface of the raised ring (6a) is higher than the top surface of the guide rod (8).

8. The hydraulic solenoid valve according to claim 7, characterized in that, The vertical distance between the top surface of the convex ring (6a) and the top surface of the guide rod (8) is 0.5mm to 1mm.

9. The hydraulic solenoid valve according to claim 7, characterized in that, A rubber sleeve (12) is also provided inside the convex ring (6a). The top of the rubber sleeve (12) is closed and the bottom is open. The rubber sleeve (12) is fixed to the pressure cap (6). The upper end of the guide rod (8) is inside the rubber sleeve (12), and the upper part of the rubber sleeve (12) extends out of the convex ring (6a).

10. The hydraulic solenoid valve according to claim 9, characterized in that, The top wall of the pressure cap (6) is also formed with a support ring (6b) coaxial with the pressure cap (6), and the support ring (6b) is sleeved on the outside of the guide rod (8). The lower end of the rubber sleeve (12) is sleeved and fixed on the outside of the support ring (6b). The inner and outer walls of the sealing ring (11) are in contact with the inner wall of the guide rod (8) and the support ring (6b) respectively for sealing.

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