A low-friction structure solenoid valve armature assembly

Abstract

The utility model discloses a kind of armature assemblies with low friction structure's electromagnetic valve, it is related to electromagnetic valve technical field, including magnetic sleeve, the armature is slidably connected in the inner wall of magnetic sleeve, the outer wall of the armature is equipped with multiple groups of equidistantly arranged groove groups, the groove group includes steel ball groove, the steel ball groove is multiple, multiple the steel ball groove is equidistantly arranged in the axial direction of armature, bearing steel ball is placed in the inside of steel ball groove of the armature, the inner wall of bearing steel ball and magnetic sleeve is contacted, the utility model is cooperated by bearing steel ball and armature, armature and the inner surface of magnetic sleeve are only point contact, significantly reduce the friction of armature and magnetic sleeve, can satisfy the application demand of electromagnetic valve;Compared with traditional glass fiber cloth, oil-free bearing and other assembly method, the utility model armature and the middle of magnetic sleeve except bearing steel ball have no other parts, simplify the structure of magnetic sleeve and armature, assembly is simpler.

Description

Technical Field

[0001] This utility model relates to the field of solenoid valve technology, and in particular to an armature assembly for a solenoid valve with a low-friction structure. Background Technology

[0002] The armature assembly is one of the key components of a solenoid valve. As a link in the magnetic circuit, the armature assembly is affected by electromagnetic force and moves within the magnetic sleeve, thereby driving the valve core, push rod and other actuators to complete the required actions and achieve the purpose of controlling the operation of the solenoid valve.

[0003] The armature is a moving part, and in actual operation, it needs to maintain a small frictional force to ensure the output force of the actuator. Current products use the following methods to reduce friction: First, use fiberglass cloth, which is wrapped around the outer wall of the armature and placed between the armature and the magnetic sleeve. The surface of the fiberglass cloth has PTFE lubrication. Second, apply a lubricating coating to the surface of the armature. Third, use oil-free bearings.

[0004] For example, application number 202422030866.9 discloses an electromagnetic device for a gearbox solenoid valve, which describes "including a magnetic housing, an electromagnetic coil fixedly sleeved on the inner wall of the magnetic housing, a magnetic sleeve fixedly sleeved inside the electromagnetic coil, an armature assembly slidably sleeved on the inner wall of the magnetic sleeve, the armature assembly including an armature and a push rod, the push rod fixedly sleeved inside the armature, and a first oilless bearing fixedly sleeved on the inner wall of one end of the magnetic sleeve." This patent, through the cooperation of the oilless bearing and the armature assembly, significantly reduces the friction between the magnetic sleeve and the armature assembly, reducing the hysteresis and dispersion of the gearbox solenoid valve, thereby ensuring the consistency of the electromagnetic force during the movement of the electromagnetic device, and thus improving the functional consistency of the solenoid valve.

[0005] However, the above methods have some shortcomings. For example, fiberglass cloth is difficult to assemble, and the PTFE-coated fiberglass cloth that can meet the requirements of solenoid valve applications is restricted by overseas manufacturers; the lubrication coating process is complex and expensive; and the assembly of oil-free bearings is complex and expensive. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a low-friction armature assembly for a solenoid valve.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An armature assembly for a low-friction solenoid valve includes a magnetic sleeve, an armature slidably fitted onto the inner wall of the magnetic sleeve, a through hole in the axial direction of the armature, and multiple sets of equidistantly arranged grooves on the outer wall of the armature. Each groove set includes a ball groove, and there are multiple ball grooves equidistantly arranged along the axial direction of the armature. Bearing balls are placed inside each ball groove of the armature, and the bearing balls are in contact with the inner wall of the magnetic sleeve.

[0009] Preferably, the armature is made of magnetic material, and the bearing steel ball is made of non-magnetic material.

[0010] Preferably, the bearing steel balls are interference-fitted with the armature through the steel ball groove.

[0011] Preferably, there are two sets of grooves, which are located at both ends of the armature.

[0012] Preferably, each set of the grooves includes three ball grooves, which are equidistant from each other along the axial direction of the armature.

[0013] The beneficial effects of this utility model are as follows:

[0014] In this invention, the design of the groove group and bearing steel ball, the cooperation between the bearing steel ball and the armature, and the point contact between the armature and the inner surface of the magnetic sleeve significantly reduce the friction between the armature and the magnetic sleeve, thus meeting the application requirements of the solenoid valve.

[0015] Meanwhile, this utility model uses standardized bearing steel balls with extremely low cost, which are durable and have an excellent cost performance. Compared with traditional assembly methods such as fiberglass cloth and oilless bearings, this utility model has no other parts between the armature and the magnetic sleeve except for the bearing steel balls, which simplifies the structure of the magnetic sleeve and the armature and makes assembly simpler. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the armature assembly for a low-friction solenoid valve according to the present invention.

[0017] Figure 2 This is a front view of an armature assembly for a solenoid valve with a low-friction structure according to this utility model.

[0018] Figure 3 This invention relates to a low-friction structure armature assembly for a solenoid valve. Figure 2 Cross-sectional view of AA.

[0019] Figure 4 This is a schematic diagram of the armature structure of an armature assembly for a low-friction solenoid valve according to the present invention.

[0020] Figure 5This is a front view of the armature of an armature assembly for a low-friction solenoid valve according to the present invention.

[0021] Figure 6 This invention relates to a low-friction structure armature assembly for a solenoid valve. Figure 5 Cross-sectional view of BB.

[0022] The following are the labels in the diagram: 1. Magnetic sleeve; 2. Armature; 3. Through hole; 4. Groove group; 401. Steel ball groove; 5. Bearing steel ball. Detailed Implementation

[0023] 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.

[0024] As attached Figure 1 To be continued Figure 6 As shown:

[0025] A low-friction solenoid valve armature assembly includes a magnetic sleeve 1, an armature 2 slidably sleeved on the inner wall of the magnetic sleeve 1, a through hole 3 opened in the axial direction of the armature 2, and multiple sets of equidistantly arranged grooves 4 opened on the outer wall of the armature 2. The grooves 4 include multiple ball grooves 401, which are equidistantly arranged along the axial direction of the armature 2. Bearing balls 5 are placed inside the ball grooves 401 of the armature 2, and the bearing balls 5 are in contact with the inner wall of the magnetic sleeve 1.

[0026] In the above technical solution, through the design of the groove group 4 and the bearing steel ball 5, the bearing steel ball 5 cooperates with the armature 2. When the armature 2 moves inside the cavity of the magnetic sleeve 1, the armature 2 and the inner surface of the magnetic sleeve 1 only make point contact, which significantly reduces the friction between the armature 2 and the magnetic sleeve 1, and can meet the application requirements of the solenoid valve.

[0027] Meanwhile, this utility model uses a standardized bearing steel ball 5 with extremely low cost, which is durable and has an excellent cost performance. Compared with the traditional assembly structure of fiberglass cloth, oil-free bearings, etc., there are no other parts between the armature 2 and the magnetic sleeve 1 except for the bearing steel ball 5, which simplifies the structure of the magnetic sleeve 1 and the armature 2 and makes assembly simpler.

[0028] The armature 2 is made of magnetic material, and the bearing steel ball 5 is made of non-magnetic material, such as 304 stainless steel.

[0029] The bearing steel ball 5 is interference-fitted with the armature 2 through the steel ball groove 401, that is, the bearing steel ball 5 is interference-fitted in the steel ball groove 401;

[0030] The groove group 4 consists of two groups, which are located at both ends of the armature 2. Each groove group 4 includes three ball grooves 401, which are arranged equidistantly along the axial direction of the armature 2.

[0031] The specific usage and function of this embodiment are as follows:

[0032] When this utility model is in use, the armature 2 is subjected to electromagnetic force and moves inside the cavity of the magnetic sleeve 1. Through the design of the groove group 4 and the bearing steel ball 5, the bearing steel ball 5 cooperates with the armature 2, and the armature 2 only makes point contact with the inner surface of the magnetic sleeve 1. The surface of the armature 2 does not contact the magnetic sleeve 1, which significantly reduces the friction between the armature 2 and the magnetic sleeve 1 and can meet the application requirements of the solenoid valve.

[0033] Please refer to the above structure and process. Figure 1-6 .

[0034] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A low-friction structure solenoid valve armature assembly comprising a magnetic sleeve (1), a sliding sleeve (2) is sleeved in the inner wall of the magnetic sleeve (1), a through hole (3) is formed in the axial center of the sliding sleeve (2), characterized in that, The outer wall of the armature (2) has multiple sets of equidistantly arranged grooves (4), each groove (4) including a ball groove (401). There are multiple ball grooves (401) arranged equidistantly along the axial direction of the armature (2). Each armature (2) has a bearing ball (5) placed inside the ball groove (401). The bearing ball (5) is in contact with the inner wall of the magnetic sleeve (1).

2. The armature assembly for a solenoid valve with a low-friction structure according to claim 1, characterized in that, The armature (2) is made of magnetic material, and the bearing steel ball (5) is made of non-magnetic material.

3. The armature assembly for a solenoid valve with a low-friction structure according to claim 1, characterized in that, The bearing steel ball (5) is interference-fitted with the armature (2) through the steel ball groove (401).

4. The armature assembly for a solenoid valve with a low-friction structure according to claim 1, characterized in that, The groove group (4) consists of two groups, which are located at both ends of the armature (2).

5. The armature assembly for a solenoid valve with a low-friction structure according to claim 4, characterized in that, Each of the groove groups (4) includes three ball grooves (401) which are equidistant from each other along the axial direction of the armature (2).

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