Lubricating structure for movable iron core assembly of electromagnetic valve
By using fiberglass cloth lubrication sleeves and push rod lubrication coatings in the moving iron core assembly of the solenoid valve, the problems of complex assembly and high cost of oilless bearing structures have been solved, achieving smooth movement of the moving iron core and reducing costs.
Patent Information
- Application Number
- CN202520213526.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-02-11
AI Technical Summary
The oilless bearing structure of the moving iron core assembly in existing solenoid valves is complex to assemble, costly, and prone to scratching the mating parts, resulting in high production costs.
The design incorporates a lubricating sleeve and a lubricating coating. The lubricating sleeve is made of fiberglass cloth and is fitted onto the outer wall of the moving iron core. The outer surface of the push rod is coated with a lubricating coating. Combined with structural improvements to the yoke and sleeve, this design enables smooth movement of the moving iron core.
This reduces the friction of the moving iron core inside the sleeve, simplifies the assembly process, lowers production costs and shortens the production cycle, while ensuring the reliability of the solenoid valve.
Smart Images
Figure CN223708721U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of solenoid valve technology, and in particular to a lubrication structure for a solenoid valve moving iron core assembly. Background Technology
[0002] Solenoid valves used in hydraulic systems have a moving iron core assembly consisting of a moving iron core and a push rod. Additionally, there is a sleeve that restricts the radial movement of the moving iron core, and a yoke that restricts the radial movement of the push rod. When the solenoid valve is energized, under the influence of a magnetic field, the moving iron core moves axially and attracts the yoke, pushing the mechanical parts and thus enabling the solenoid valve to function. The ability of the moving iron core assembly to move flexibly in the axial direction without deflection is crucial to the performance of the solenoid valve.
[0003] Currently, most solenoid valves on the market have a double oilless bearing structure, meaning that both the push rod and the moving iron core use oilless bearings to restrict the radial movement of the moving iron core assembly and reduce axial friction, thereby ensuring smooth movement of the moving iron core assembly. However, the assembly process of oilless bearings and their components is complex, requires high-quality assembly equipment, and has a long production cycle. Furthermore, they are prone to scratching the paired components, resulting in scrap. In addition, the manufacturing cost of oilless bearings themselves is high, leading to a high product cost. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a lubrication structure for the moving iron core assembly of an electromagnetic valve.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A lubrication structure for a moving iron core assembly of a solenoid valve includes a yoke and a coil assembly. A sleeve is fitted inside the coil assembly. The yoke is located on one side of the sleeve and is fixedly fitted to the sleeve. A moving iron core assembly is slidably fitted inside the sleeve. The moving iron core assembly includes a push rod and a moving iron core. The push rod is fixedly fitted to the moving iron core. A through hole is opened in the middle of the yoke, and the push rod is slidably fitted to the yoke through the through hole. A lubrication sleeve is fitted on the outer wall of the moving iron core, and the moving iron core is slidably fitted to the sleeve through the lubrication sleeve.
[0007] Preferably, the push rod and the moving iron core are fixedly connected by an interference fit.
[0008] Preferably, the push rod is a cylinder, and an axial oil drain hole is provided at the end of the push rod. A radial oil drain hole is provided on the side wall of the push rod. The axial oil drain hole and the radial oil drain hole are connected. There are two radial oil drain holes.
[0009] Preferably, the outer surface of the push rod is provided with a lubricating coating.
[0010] Preferably, the lubricating sleeve is made of fiberglass cloth wound into a ring.
[0011] Preferably, the outer wall of one side of the sleeve is provided with an outer groove, and there are two outer grooves. The inner wall of the coil assembly is provided with a protrusion that matches the outer groove.
[0012] The beneficial effects of this utility model are as follows:
[0013] 1. In this utility model, through the design of the lubrication sleeve, when the moving iron core moves axially, the lubrication sleeve is used to lubricate the moving iron core, effectively reducing the frictional force generated by the relative motion and ensuring that the moving iron core moves smoothly in the sleeve.
[0014] 2. In this utility model, the outer surface of the push rod is provided with a lubricating coating, which plays a lubricating role and ensures that the push rod moves smoothly in the through hole of the yoke.
[0015] In summary, the present invention provides a lubrication structure for the moving iron core assembly of a solenoid valve, wherein the push rod part uses a lubricating coating and the moving iron core part uses fiberglass cloth. This structure does not affect the radial restriction of the moving iron core assembly and ensures axial lubrication, thus ensuring smooth movement of the moving iron core assembly. While ensuring the reliability of the solenoid valve, it can save parts, simplify the assembly process, reduce the production cost of the solenoid valve, and shorten the production cycle. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the lubrication structure of the moving iron core assembly of an electromagnetic valve according to the present invention.
[0017] Figure 2 This is a front view of the lubrication structure of the moving iron core assembly of an electromagnetic valve according to this utility model.
[0018] Figure 3 This utility model relates to a lubrication structure for a moving iron core assembly of an electromagnetic valve. Figure 2 Cross-sectional view of AA.
[0019] Figure 4 This utility model relates to a lubrication structure for a moving iron core assembly of an electromagnetic valve. Figure 3 A schematic diagram of the local structure at point A in the middle.
[0020] Figure 5 This is an exploded view of the lubrication structure of the moving iron core assembly of an electromagnetic valve according to this utility model.
[0021] Figure 6 This is a schematic diagram of the sleeve of the lubrication structure of the moving iron core assembly of an electromagnetic valve according to this utility model.
[0022] Figure 7This is a schematic diagram of the coil assembly of the lubrication structure of the moving iron core assembly of an electromagnetic valve according to the present invention.
[0023] Figure 8 This is a schematic diagram of the coil assembly of the lubrication structure of the moving iron core assembly of an electromagnetic valve according to the present invention.
[0024] The following are the labels in the diagram: 1. Yoke; 2. Coil assembly; 201. Protrusion; 3. Push rod; 4. Moving iron core; 5. Sleeve; 501. External groove; 6. Lubrication sleeve. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0026] As attached Figure 1 To be continued Figure 5 As shown, a lubrication structure for a moving iron core assembly of a solenoid valve includes a yoke 1 and a coil assembly 2. A sleeve 5 is sleeved inside the coil assembly 2. The yoke 1 is located on one side of the sleeve 5 and is fixedly sleeved with the sleeve 5. The moving iron core assembly is slidably sleeved inside the sleeve 5. The yoke 1 and the sleeve 5 form an axial cavity, and the moving iron core assembly can move axially within the cavity. The moving iron core assembly includes a push rod 3 and a moving iron core 4. The push rod 3 is fixedly sleeved with the moving iron core 4. A through hole is opened in the middle of the yoke 1, and the push rod 3 is slidably sleeved with the yoke 1 through the through hole. A lubrication sleeve 6 is sleeved on the outer wall of the moving iron core 4. The lubrication sleeve 6 is located between the moving iron core 4 and the sleeve 5, and the moving iron core 4 is slidably sleeved with the sleeve 5 through the lubrication sleeve 6.
[0027] In the above technical solution, the coil assembly 2 is the electromagnetic generation part. After the coil assembly 2 generates a magnetic field, the moving iron core assembly moves axially toward the yoke 1 under the action of the magnetic field. When the magnetic field decreases, the moving iron core assembly moves axially away from the yoke 1 under the action of other external forces. When the moving iron core 4 moves axially, the lubrication sleeve 6 is used to lubricate the moving iron core 4, effectively reducing the friction generated by the relative motion and ensuring that the moving iron core 4 moves smoothly in the sleeve 5.
[0028] It is worth mentioning that the yoke 1 and the coil assembly 2 are conventional products in the prior art, which are mature technologies in the field and have been fully disclosed, so they will not be repeated in the specification.
[0029] As attached Figure 3 As shown, push rod 3 and moving iron core 4 are fixedly sleeved by interference fit. Push rod 3 is a cylinder. An axial oil drain hole is opened at the end of push rod 3. A radial oil drain hole is opened on the side wall of push rod 3. The axial oil drain hole and the radial oil drain hole are connected. There are two radial oil drain holes.
[0030] As attached Figure 1 To be continued Figure 5 As shown, the outer surface of the push rod 3 is provided with a lubricating coating, which is a sprayed Teflon coating. The lubricating coating plays a lubricating role, ensuring that the push rod 3 moves smoothly in the through hole of the yoke 1; the lubricating sleeve 6 is made of glass fiber cloth, which is wound into a ring. The glass fiber cloth is used to lubricate the moving iron core 4, ensuring that the moving iron core 4 moves smoothly in the sleeve 5.
[0031] As attached Figure 6 To be continued Figure 8 As shown, an outer groove 501 is provided on one side of the outer wall of the sleeve 5. There are two outer grooves 501. The inner wall of the coil assembly 2 is provided with a protrusion 201 that matches the outer groove 501.
[0032] In the above technical solution, the sleeve 5 is fitted into the coil assembly 2, and the protrusion 201 is inserted into the outer groove 501. Through the design of the outer groove 501, the two outer grooves 501 protrude inward, thereby forming an oil passage groove on one side of the inner wall of the sleeve 5.
[0033] The specific usage and function of this embodiment are as follows:
[0034] When this utility model is used, the coil assembly 2 is the electromagnetic generating part. After the coil assembly 2 generates a magnetic field, the moving iron core assembly moves axially toward the yoke 1 under the action of the magnetic field. When the magnetic field decreases, the moving iron core assembly moves axially away from the yoke 1 under the action of other external forces.
[0035] When the moving iron core assembly moves axially, the lubricating coating on the push rod 3 plays a lubricating role, ensuring that the push rod 3 moves smoothly in the through hole of the yoke 1. The glass fiber cloth wrapped around the outer wall of the moving iron core 4 does not affect the radial restriction of the moving iron core 4, but also ensures the axial lubrication of the moving iron core 4, ensuring that the moving iron core 4 moves smoothly in the sleeve 5 and effectively reducing the friction generated by the relative movement.
[0036] Please refer to the above structure and process. Figure 1-5 .
[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A solenoid armature assembly lubrication structure comprising a yoke (1), a coil assembly (2), characterized in that, The coil assembly (2) is sleeved with a sleeve (5), the yoke (1) is located on one side of the sleeve (5), the yoke (1) is fixedly sleeved with the sleeve (5), a movable iron core assembly is slidably sleeved in the sleeve (5), the movable iron core assembly comprises a push rod (3) and a movable iron core (4), the push rod (3) is fixedly sleeved with the movable iron core (4), a through hole is formed in the middle of the yoke (1), the push rod (3) is slidably sleeved with the yoke (1) through the through hole, a lubricating sleeve (6) is sleeved on the outer wall of the movable iron core (4), the lubricating sleeve (6) is located between the movable iron core (4) and the sleeve (5), and the movable iron core (4) is slidably sleeved with the sleeve (5) through the lubricating sleeve (6).
2. The electromagnetic valve moving iron assembly lubrication structure according to claim 1, characterized by, The push rod (3) and the movable iron core (4) are fixedly sleeved through interference fit.
3. The electromagnetic valve moving iron assembly lubrication structure according to claim 2, characterized by, The push rod (3) is a cylinder, axial oil discharge holes are formed in the end of the push rod (3), radial oil discharge holes are formed in the side wall of the push rod (3), the axial oil discharge holes and the radial oil discharge holes are communicated, and the radial oil discharge holes are two.
4. The electromagnetic valve armature assembly lubrication structure of claim 1, wherein A lubricating coating is arranged on the outer surface of the push rod (3).
5. The electromagnetic valve armature assembly lubrication structure of claim 1 wherein, The lubricating sleeve (6) is made of glass fiber cloth, and the glass fiber cloth is wound into an annular shape.
6. The electromagnetic valve armature assembly lubrication structure of claim 1, wherein An outer groove (501) is formed in the outer wall of one side of the sleeve (5), the outer groove (501) is two, and the inner wall of the coil assembly (2) is provided with a protrusion (201) matched with the outer groove (501).