Electromagnet and hydraulic valve

Abstract

The utility model belongs to the technical field of electromagnets for hydraulic valves, and discloses an electromagnet. Comprising a framework, a movable iron core, a static iron core, a first terminal, a second terminal and a socket, the framework comprises a framework body and a lining, the framework body is provided with a first center hole penetrating in the axis direction of the framework body, the lining is arranged in the first center hole and attached to the hole wall of the first center hole, the lining is provided with a second center hole penetrating in the axis direction of the lining, and the lining is made of metal; the movable iron core is inserted into the second center hole from one side of the framework; the static iron core is inserted into the second center hole from the other side of the framework. The electromagnet solves the problems that an electromagnetic coil framework in a traditional electromagnet for the hydraulic valve is low in voltage resistance and prone to deformation and cracking in a high-pressure environment, so that an electromagnetic coil structure is damaged, electrical faults are caused, and the size of the electromagnet is large.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electromagnet for hydraulic valve, especially relates to an electromagnet and hydraulic valve. BACKGROUND

[0002] In the technical field of electromagnetic coil for hydraulic valve, electromagnet plays a key role. The traditional electromagnet for hydraulic valve, its skeleton main part usually adopts single plastic material, under the general working environment, this structure can still satisfy the basic use demand.

[0003] However, with the continuous development of industrial technology, the working pressure of hydraulic system gradually increases, under the high pressure environment, the skeleton main body of single plastic material faces many severe challenges, the mechanical properties of plastic material itself have limitations under the high pressure, and cracking phenomenon is prone to occur, once the skeleton cracks, will directly lead to the assembly failure of electromagnetic coil and skeleton, and then affect the normal operation of the whole hydraulic valve. This not only reduces the working efficiency of equipment, but also can cause safety hazards, such as hydraulic oil leakage and other problems, which brings great inconvenience and loss to production and operation. Moreover, the traditional electromagnet structure often needs to additionally increase some protection or supporting parts when coping with high pressure environment, which makes the whole electromagnet larger in size, and is not conducive to application in some devices or systems with higher space requirements. For example, in some precise hydraulic control systems, the internal space of the equipment is limited, and the larger size of the electromagnet will limit the layout and optimization of the system, increase the difficulty of design and installation. In addition, the traditional electromagnet also has some deficiencies in the winding process. In the winding process, due to the lack of reasonable structure design, the stability of winding is difficult to guarantee, winding irregularity, wire wear and other problems are prone to occur, which affects the performance and quality of the electromagnetic coil, and then reduces the working reliability of the electromagnet. At the same time, in the assembly process, the complex process and welding procedure not only increase the production cost, but also reduce the production efficiency, which is not conducive to large-scale industrial production. Therefore, a new type of electromagnet structure is needed to overcome the above-mentioned many defects to adapt to the development needs of modern hydraulic valve technology in high pressure, miniaturization, high efficiency production and other aspects. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing an electromagnet, which aims at solving the problems of low pressure resistance, easy deformation, cracking and thus damaging the structure of electromagnetic coil, causing electrical failure and large size of electromagnet in the traditional electromagnetic coil for hydraulic valve.

[0005] To achieve this purpose, the utility model adopts the following technical scheme:

[0006] An electromagnet comprises:

[0007] A skeleton includes a skeleton main body and a lining, the skeleton main body is provided with a first center hole penetrating along the axial direction, the lining is arranged in the first center hole and is in contact with the hole wall of the first center hole, the lining is provided with a second center hole penetrating along the axial direction, and the lining is made of metal;

[0008] A moving iron core is inserted into the second center hole from one side of the skeleton;

[0009] A static iron core is inserted into the second center hole from the other side of the skeleton.

[0010] Preferably, the length of the skeleton main body and the lining along the axial direction is equal, and the openings of the first center hole and the second center hole on both sides are trumpet-shaped.

[0011] Preferably, the skeleton main body includes a winding part, a first limiting part and a second limiting part, the winding part is wound with a wire, and the first limiting part and the second limiting part are respectively arranged at both ends of the winding part along the axial direction to limit the wire.

[0012] Preferably, the electromagnet further includes a first terminal and a second terminal, the skeleton main body further includes a mounting part arranged on the side of the second limiting part away from the first limiting part, and the first terminal and the second terminal are arranged on the mounting part.

[0013] Preferably, the mounting part is provided with two terminal mounting parts, and the first terminal and the second terminal are respectively inserted into the two terminal mounting parts.

[0014] Preferably, the first terminal and the second terminal each include a wire clamping part and an insertion part, the insertion part is inserted into the terminal mounting part, and the wire clamping part fixes the wire.

[0015] Preferably, the electromagnet further includes a socket, the mounting part is provided with a positioning pin, and the positioning pin is positioned and inserted into the socket.

[0016] Preferably, it further includes a guide part, the guide part includes a guide part and a limiting part, the guide part is inserted into the second center hole from one side of the skeleton, the limiting part is in abutment with the end face of one side of the skeleton, and the moving iron core is inserted into the guide part.

[0017] Preferably, it further includes a first sealing ring and a second sealing ring, the first sealing ring and the second sealing ring are arranged on the inner wall of the lining, the first sealing ring is used for sealing abutment with the static iron core, and the second sealing ring is used for sealing abutment with the guide part.

[0018] A hydraulic valve includes an electromagnet as described in any of the above solutions.

[0019] Advantages:

[0020] The utility model provides a kind of electromagnet, the electromagnet includes framework, moving iron core and static iron core, wherein framework includes framework main body and inner lining again, framework main body is provided with the first center hole along the axial direction, inner lining is arranged in the first center through-hole, and the outer surface of inner lining is attached with the hole wall of first center hole, inner lining is further provided with the second center hole along the axial direction, moving iron core and static iron core are respectively inserted in the second center hole from the two sides of framework;Inner lining provides additional support for framework main body, ensures the compression resistance of framework main body in high-pressure environment, in addition, inner lining is metal material, while playing the supporting role, also replaces magnetic core tube, moving iron core and static iron core can be inserted in the inside of inner lining, so that overall structure is more compact, to reduce the volume of electromagnet. The utility model solves the problems of low compression resistance, easy deformation, cracking and thus damaging electromagnetic coil structure, causing electrical fault and large volume of electromagnet in traditional hydraulic valve electromagnet. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the sectional view of the electromagnet of the utility model;

[0022] Figure 2 It is the inner lining schematic view of the electromagnet of the utility model;

[0023] Figure 3 It is the framework main body schematic view of the electromagnet of the utility model;

[0024] Figure 4 It is the framework sectional view of the electromagnet of the utility model;

[0025] Figure 5 It is the framework isometric view of the electromagnet of the utility model;

[0026] Figure 6 It is the first terminal isometric view of the electromagnet of the utility model;

[0027] Figure 7 It is the wire entry guide groove and wire exit guide groove schematic view a of the framework of the electromagnet of the utility model;

[0028] Figure 8 It is the wire entry guide groove and wire exit guide groove schematic view b of the framework of the electromagnet of the utility model;

[0029] Figure 9 It is the guide piece isometric view of the electromagnet of the utility model;

[0030] Figure 10 It is the socket isometric view of the electromagnet of the utility model;

[0031] In the drawing:

[0032] 1, skeleton; 11, skeleton main body; 111, first center hole; 112, first limiting part; 113, second limiting part; 114, winding part; 115, mounting piece; 1151, terminal mounting part; 1152, positioning pin; 1153, wire entry guide groove; 1154, wire exit guide groove; 12, inner liner; 121, second center hole; 2, moving iron core; 3, static iron core; 41, first terminal; 42, second terminal; 411, wire clamping part; 412, plug-in part; 51, first sealing ring; 52, second sealing ring; 6, guide piece; 61, guide part; 62, limiting part; 7, limiting sheet; 8, shell; 9, socket; 91, positioning hole; 92, terminal interface; 93, power supply opening; 10, coil. DETAILED DESCRIPTION

[0033] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0034] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] In the description of the present embodiment, the terms "upper", "lower", "right", and the like, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0037] As shown in Figures 1-4 The present embodiment provides an electromagnet, comprising a skeleton 1, a moving iron core 2 and a static iron core 3, wherein the skeleton 1 comprises a skeleton main body 11 and an inner lining 12, the skeleton main body 11 is provided with a first center hole 111 penetrating along its axial direction, the inner lining 12 is arranged in the first center hole 111 and is attached to the hole wall of the first center hole 111, the skeleton main body 11 and the inner lining 12 are made by insert injection molding process, the skeleton main body 11 can be made of engineering plastics such as polycarbonate (PC), nylon (PA) and the like, which have good insulation performance, mechanical strength and heat resistance, and can meet the requirements of the electromagnet in general working environment. The inner lining 12 is provided with a second center hole 121 penetrating along its axial direction, the inner lining 12 is made of metal material, which provides additional support for the skeleton main body 11 and ensures the pressure resistance of the skeleton main body 11 in high pressure environment, in the present embodiment, the inner lining 12 is made of stainless steel material, such as 304 stainless steel or 316 stainless steel, the 304 stainless steel has good corrosion resistance and processing performance, and is suitable for general hydraulic medium environment; the 316 stainless steel is better in corrosion resistance, especially in the hydraulic system containing chloride ions and other corrosive media, the stainless steel lining is formed by stamping or mechanical processing, in addition, the inner lining 12 not only plays a supporting role, but also replaces the magnetic core tube, the moving iron core 2 is inserted into the second center hole 121 from one side of the skeleton 1, the static iron core 3 is inserted into the second center hole 121 from the other side of the skeleton 1, and the moving iron core 2 and the static iron core 3 can be inserted into the inside of the inner lining 12, so that the overall structure is more compact, thereby reducing the volume of the electromagnet, the moving iron core 2 and the static iron core 3 are usually made of high permeability materials such as soft iron and the like, so as to enhance the magnetism of the electromagnet, when the electromagnet is energized, the moving iron core 2 will move axially along the second center hole 121 under the action of the magnetic field force, the movement of the moving iron core 2 can push the valve core, thereby changing the flow area or on-off state of the hydraulic valve, and realizing the control of the pressure, flow and other parameters of the hydraulic system.

[0038] Preferably, as Figure 4As shown, the lengths of the skeleton body 11 and the inner liner 12 in the axial direction are equal, and the openings on both sides of the first central hole 111 and the openings on both sides of the second central hole 121 are in a trumpet shape; the equal lengths of the skeleton body 11 and the inner liner 12 in the axial direction can ensure the continuity of the magnetic field in the entire electromagnet, which is conducive to generating a stable magnetic field and realizing efficient transmission and conversion of electric energy; when the electromagnet is assembled, the trumpet-shaped openings on both sides reserve a certain space, which can serve as a sealing groove, and the sealing member can be arranged in the sealing groove to form a sealed cavity inside the inner liner 12, thereby preventing the hydraulic oil from leaking.

[0039] Preferably, as shown in the drawings, Figure 3 As shown, the skeleton body 11 includes a winding part 114, a first limiting part 112 and a second limiting part 113, the winding part 114 is wound with a wire, which has a suitable diameter and length to meet the required number of turns and inductance requirements, and the first limiting part 112 and the second limiting part 113 are respectively arranged at both ends of the winding part 114 in the axial direction to effectively limit the wire and prevent the coil from moving axially during winding or during the operation of the electromagnet.

[0040] The electromagnet provided by the embodiment further includes a first terminal 41 and a second terminal 42, and the skeleton body 11 further includes a mounting part 115, the mounting part 115 is arranged on the side of the second limiting part 113 away from the first limiting part 112, the first terminal 41 and the second terminal 42 are arranged on the mounting part 115, and the mounting part 115 is provided with two terminal mounting parts 1151, and the first terminal 41 and the second terminal 42 are respectively inserted into the two terminal mounting parts 1151.

[0041] Preferably, the skeleton body 11 is provided with a wire groove, and the wire groove is located between the mounting part 115 and the second limiting part 113, and the wire groove is used to guide the wire to the winding part 114 for winding, so that the wire can be connected to the terminal in an orderly and neat manner, avoiding the chaotic winding of the wire affecting the electromagnetic performance and product reliability.

[0042] Preferably, as shown in the drawings, Figures 7-8As shown, the mounting piece 115 is provided with an incoming wire guide slot 1153 and an outgoing wire guide slot 1154 between the first limiting part 112 or the second limiting part 113, when the second terminal 42 is used as an incoming terminal and the first terminal 41 is used as an outgoing terminal, the wire is wound around the winding part 114 from the second terminal 42 along the incoming wire guide slot 1153 clockwise from the incoming wire guide slot outlet, during the winding process, the number of winding turns is determined according to the required electromagnetic parameters, and the tension of the wire should be uniform during winding to avoid deformation of the inner hole of the skeleton or damage to the wire due to uneven tension. After winding the specified number of turns, the wire enters the outgoing wire guide slot 1154 from the inlet and reaches the first terminal 41 along the outgoing wire guide slot 1154 clockwise. This design makes the entire coil 10 winding process more standardized and efficient, and can be applied to automated production, greatly improving production efficiency and product quality consistency.

[0043] Preferably, as shown in Figure 6 The first terminal 41 and the second terminal 42 each include a wire clamping part 411 and a plug-in part 412, the plug-in part 412 is plugged into the terminal mounting part 1151, the wire clamping part 411 fixes the wire to ensure firm connection between the wire and the terminal, reduce contact resistance and improve the electrical performance of the electromagnetic coil; the electromagnet further comprises a socket 9, and the mounting piece 115 is further provided with a positioning pin 1152, the positioning pin 1152 is positioned and plugged with the socket 9. As shown in Figure 10 The socket 9 is provided with a positioning hole 91, a terminal interface 92 and a power supply port 93, the positioning pin 1152 is plugged into the positioning hole 91, the first terminal 41 and the second terminal 42 are plugged into the terminal interface 92 and contact the terminals in the socket 9, and the power supply port 93 is used for connecting the power supply to energize the electromagnet. The positioning pin 1152, the positioning hole 91 and the terminal interface 92 facilitate the installation and positioning between the skeleton 1 and the socket 9, and improve the assembly precision and efficiency.

[0044] Preferably, as shown in Figure 1 , Figure 9 The electromagnet provided by the embodiment further comprises a guide piece 6, the guide piece 6 comprises a guide part 61 and a limiting part 62, the guide part 61 is inserted into the second center hole 121 from one side of the skeleton 1, and the limiting part 62 abuts against the end face of one side of the skeleton 1, the moving iron core 2 is inserted into the guide piece 6, and the guide piece 6 can ensure that the moving iron core 2 moves linearly during movement, avoiding deviation or jamming, and improving the action reliability and precision of the electromagnet.

[0045] Preferably, as shown in Figure 1As shown, the electromagnet provided by the embodiment further comprises a first sealing ring 51 and a second sealing ring 52, the first sealing ring 51 and the second sealing ring 52 are arranged on the inner wall of the inner liner 12 and located in the sealing groove formed by the trumpet-shaped opening on both sides of the second center hole 121 of the inner liner 12, in addition, the shell 8 is integrally arranged with the static iron core 3, when the skeleton 1 is arranged in the shell 8, the static iron core 3 is inserted into the second center hole 121 from one side of the skeleton 1, at this time, the first sealing ring 51 is in sealing abutment with the static iron core 3, the guide part 61 is inserted into the second center hole 121 from the other side of the skeleton 1, the limiting part 62 is in abutment with the end surface of one side of the skeleton 1, the moving iron core 2 is inserted into the guide part 6, and the second sealing ring 52 is in sealing abutment with the guide part 6, so that a sealed cavity is formed in the inside of the skeleton 1, and the sealing structure can effectively prevent the hydraulic oil and other media from entering the inside of the electromagnet, protect the electromagnetic coil and the iron core from being corroded by the media, and help maintain the stability of the magnetic field in the electromagnet, thereby avoiding the magnetic field interference caused by the leakage of the media.

[0046] Preferably, as Figure 1 As shown, the electromagnet provided by the embodiment further comprises a limiting sheet 7, the limiting sheet 7 is blocked at one end of the limiting part 62 and is used for limiting the moving iron core 2, so as to accurately limit the stroke range of the moving iron core 2, prevent the moving iron core 2 from damaging other components or affecting the normal work of the electromagnet due to excessive movement, and help improve the mechanical stability and service life of the entire electromagnet.

[0047] The hydraulic valve comprises the electromagnet, and through the arrangement of the electromagnet, the hydraulic valve can normally work in a high-pressure environment, the cracking of the skeleton of the electromagnetic coil is avoided, the safety hidden danger is reduced, the working efficiency of the equipment is ensured, the volume of the hydraulic valve can be reduced, and the hydraulic valve can be applied to equipment or a system with high space requirement.

[0048] In conclusion, the electromagnet for the hydraulic valve has obvious innovation and practicality in the technical field of electromagnets for hydraulic valves, can effectively solve many problems of the skeleton of the traditional electromagnet in a high-pressure environment, provides flexible design options for different application requirements through the provision of various alternative schemes, and has wide market application prospects.

[0049] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled persons in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the utility model. It is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model shall be included in the protection scope of the utility model claim.

Claims

1. An electromagnet characterized in that, The electromagnet comprises: a skeleton (1) comprising a skeleton body (11) and an inner liner (12), the skeleton body (11) is provided with a first central hole (111) penetrating along the axial direction thereof, the inner liner (12) is arranged in the first central hole (111) and is in close contact with the hole wall of the first central hole (111), the inner liner (12) is provided with a second central hole (121) penetrating along the axial direction thereof, and the inner liner (12) is made of metal; a moving iron core (2) inserted into the second central hole (121) from one side of the skeleton (1); a static iron core (3) inserted into the second central hole (121) from the other side of the skeleton (1).

2. The electromagnet of claim 1, wherein The lengths of the skeleton body (11) and the inner liner (12) in the axial direction are equal, and the openings of the first central hole (111) and the second central hole (121) on both sides are in a trumpet shape.

3. The electromagnet of claim 1, wherein The skeleton body (11) comprises a winding part (114), a first limiting part (112) and a second limiting part (113), the winding part (114) is wound with a wire, and the first limiting part (112) and the second limiting part (113) are respectively arranged at both ends of the winding part (114) in the axial direction to limit the wire.

4. The electromagnet of claim 3, wherein The electromagnet further comprises a first terminal (41) and a second terminal (42), and the skeleton body (11) further comprises a mounting part (115), the mounting part (115) is arranged on the side of the second limiting part (113) away from the first limiting part (112), and the first terminal (41) and the second terminal (42) are arranged on the mounting part (115).

5. The electromagnet of claim 4, wherein Two terminal mounting parts (1151) are arranged on the mounting part (115), and the first terminal (41) and the second terminal (42) are correspondingly inserted into the two terminal mounting parts (1151).

6. The electromagnet of claim 5, wherein The first terminal (41) and the second terminal (42) each comprise a wire clamping part (411) and an insertion part (412), the insertion part (412) is inserted into the terminal mounting part (1151), and the wire clamping part (411) fixes the wire.

7. The electromagnet of claim 4, wherein The electromagnet further comprises a socket (9), a positioning pin (1152) is arranged on the mounting part (115), and the positioning pin (1152) is in positioning insertion with the socket (9).

8. The electromagnet according to any one of claims 1 to 7, characterized in that Further comprising a guide part (6), the guide part (6) comprises a guide part (61) and a limiting part (62), the guide part (61) is inserted into the second central hole (121) from one side of the skeleton (1), the limiting part (62) abuts against the end face of one side of the skeleton (1), and the moving iron core (2) is inserted into the guide part (6).

9. The electromagnet of claim 8, wherein Further comprising a first sealing ring (51) and a second sealing ring (52), the first sealing ring (51) and the second sealing ring (52) are arranged on the inner wall of the inner liner (12), the first sealing ring (51) is used for sealing abutment with the static iron core (3), and the second sealing ring (52) is used for sealing abutment with the guide part (6).

10. A hydraulic valve characterized by, An electromagnet comprising the magnet of any one of claims 1 to 9.

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