Electromagnetic device for gearbox electromagnetic valve

Abstract

The utility model discloses an electromagnetic device for a gearbox electromagnetic valve, which relates to the technical field of electromagnetic valves, and comprises a magnetic shell, an electromagnetic coil is fixedly sleeved on the inner wall of the magnetic shell, a magnetic sleeve is fixedly sleeved inside the electromagnetic coil, an armature assembly is slidably sleeved on the inner wall of the magnetic sleeve, and the armature assembly is sleeved on the inner wall of the magnetic sleeve. The armature assembly comprises an armature and a push rod, the push rod is fixedly connected to the interior of the armature in a sleeved mode, the inner wall of one end of the magnetic sleeve is fixedly connected with a first oilless bearing in a sleeved mode, and the inner wall of the other end of the magnetic sleeve is fixedly connected with a second oilless bearing in a sleeved mode. The structure of the magnetic sleeve and the armature assembly is simplified, the friction force of the magnetic sleeve and the armature assembly is obviously reduced, the hysteresis and dispersion difference of the gearbox electromagnetic valve are reduced, and therefore the electromagnetic force consistency of an electromagnetic device in the moving process is guaranteed, and the function consistency of the electromagnetic valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to an electromagnetic device for a gearbox solenoid valve. Background Art

[0002] The solenoid valve is an essential and crucial component for shifting in a transmission. The solenoid valve regulates the oil pressure characteristic curve, enabling both oil pressure regulation and shifting. Vehicle speed and engine speed are fed back to the automatic transmission solenoid valve to control the oil circuit, achieving shifting through controlled oil pressure.

[0003] Current transmission solenoid valves utilize complex structures to meet various functional requirements. This can lead to dimensional instability during manufacturing. This instability manifests itself in poor friction consistency between the magnetic sleeve and the armature assembly, resulting in significant hysteresis and hysteresis dispersion, which in turn directly impacts the valve's functional consistency. Furthermore, complex drain structures are often employed to ensure adequate oil drainage. This structural influence prevents adjustable damping, further increasing manufacturing costs. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose an electromagnetic device for a transmission solenoid valve.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An electromagnetic device for a transmission solenoid valve includes a magnetic shell, an electromagnetic coil is fixedly sleeved on the inner wall of the magnetic shell, a magnetic sleeve is fixedly sleeved inside the electromagnetic coil, an armature assembly is slidably sleeved on the inner wall of the magnetic sleeve, the armature assembly includes an armature and a push rod, the push rod is fixedly sleeved inside the armature, a first oil-free bearing is fixedly sleeved on the inner wall of one end of the magnetic sleeve, and a second oil-free bearing is fixedly sleeved on the inner wall of the other end of the magnetic sleeve, both ends of the push rod extend to the outside of the first and second oil-free bearings, and a through hole is opened on the outer wall of the push rod.

[0007] Preferably, a magnetic gasket is fixedly sleeved on the inner wall of one end of the magnetic shell, the inner ring of the magnetic gasket is fixedly connected to the outer wall of the magnetic sleeve, and a magnetic washer is fixedly sleeved on the inner wall of the other end of the magnetic shell.

[0008] Preferably, the magnetic sleeve is in the shape of an integrally machined annular sleeve.

[0009] Preferably, the armature and the push rod are fixedly connected by interference fit.

[0010] Preferably, the push rod is a cylinder, 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 is connected to the radial oil drain hole, and there is at least one radial oil drain hole.

[0011] The beneficial effects of the utility model are:

[0012] 1. In the present invention, the structure of the magnetic sleeve and the armature assembly is simplified by cooperating with the first oil-free bearing, the second oil-free bearing and the armature assembly, which significantly reduces the friction between the magnetic sleeve and the armature assembly, reduces the hysteresis and dispersion of the gearbox solenoid valve, and the simplified sub-components also have better processing consistency, thereby ensuring the consistency of the electromagnetic force of the electromagnetic device during movement, thereby improving the functional consistency of the solenoid valve.

[0013] 2. In the present invention, the design of the axial oil drain hole and the radial oil drain hole in the push rod, wherein the radial oil drain hole can be multiple, has a simple structure compared with similar products. By changing the number of radial oil drain holes 702 or the aperture of the oil drain hole 702, the oil drain hole area is changed, the damping is adjustable, the deformability of the electromagnetic device is enhanced, and the processing cost is reduced.

[0014] In summary, the structure adopted by the present invention has the advantages of fewer components, simple process, low processing cost, etc., and can also better improve the consistency of the solenoid valve function. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of an electromagnetic device for a gearbox solenoid valve of the present utility model.

[0016] Figure 2 This is a front view of an electromagnetic device for a transmission solenoid valve according to the present invention.

[0017] Figure 3 This is a left view of an electromagnetic device for a transmission solenoid valve according to the present invention.

[0018] Figure 4 This utility model is an electromagnetic device for a gearbox solenoid valve Figure 3 Cross-sectional view of AA.

[0019] Figure 5 The utility model is a schematic structural diagram of a push rod of an electromagnetic device for a transmission solenoid valve.

[0020] Numbers in the figure: 1, magnetic shell; 2, magnetic gasket; 3, first oil-free bearing; 4, armature; 5, electromagnetic coil; 6, magnetic gasket; 7, push rod; 701, axial oil drain hole; 702, radial oil drain hole; 8, magnetic sleeve; 9, second oil-free bearing. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] As attached Figure 1 To the attached Figure 4 As shown:

[0023] An electromagnetic device for a gearbox solenoid valve includes a magnetic shell 1, an electromagnetic coil 5 is fixedly sleeved on the inner wall of the magnetic shell 1, a magnetic sleeve 8 is fixedly sleeved inside the electromagnetic coil 5, an armature assembly is slidably sleeved on the inner wall of the magnetic sleeve 8, and the armature assembly includes an armature 4 and a push rod 7. The push rod 7 is fixedly sleeved inside the armature 4, a first oil-free bearing 3 is fixedly sleeved on the inner wall of one end of the magnetic sleeve 8, and a second oil-free bearing 9 is fixedly sleeved on the inner wall of the other end of the magnetic sleeve 8. Both ends of the push rod 7 extend to the outside of the first oil-free bearing 3 and the second oil-free bearing 9, and a through hole is opened on the outer wall of the push rod 7.

[0024] In the above technical solution, the push rod 7 is interference-pressed into the armature 4, and together they constitute an armature assembly. The armature assembly is attracted by the electromagnetic force, and the armature assembly moves inside the cavity of the magnetic sleeve 8, transmitting the electromagnetic force to the outside of the electromagnetic part; the first oil-free bearing 3 and the second oil-free bearing 9 cooperate with the push rod 7 in the armature assembly to limit the armature assembly to move only in the axial direction; the through hole on the push rod 7 is used to ensure the flow of oil in the oil drainage channel.

[0025] As attached Figure 1 To the attached Figure 5 As shown, a magnetic gasket 2 is fixedly sleeved on the inner wall of one end of the magnetic shell 1, and the inner ring of the magnetic gasket 2 is fixedly connected to the outer wall of the magnetic sleeve 8. A magnetic gasket 6 is fixedly sleeved on the inner wall of the other end of the magnetic shell 1. The shape of the magnetic sleeve 8 is an integrally processed annular sleeve. The armature 4 and the push rod 7 are fixedly connected by an interference fit. The push rod 7 is a cylinder. An axial oil drain hole 701 is provided at the end of the push rod 7, and a radial oil drain hole 702 is provided on the side wall of the push rod 7. The axial oil drain hole 701 is connected to the radial oil drain hole 702. There is at least one radial oil drain hole 702. By changing the number of radial oil drain holes 702 or the aperture of the oil drain hole 702, the oil drain hole area is changed to achieve adjustable damping.

[0026] The specific usage and function of this embodiment are as follows:

[0027] When the present invention is used, the push rod 7 is pressed into the armature 4 by interference, and together they form an armature assembly. The armature assembly is attracted by the electromagnetic force, and the armature assembly moves inside the cavity of the magnetic sleeve 8, transmitting the electromagnetic force to the outside of the electromagnetic part;

[0028] The design of the axial oil drain hole 701 and the radial oil drain hole 702 in the push rod 7, wherein the radial oil drain hole 702 can be multiple, and the damping can be adjusted by changing the number of radial oil drain holes 702 or the aperture of the oil drain hole 702, thereby changing the oil drain hole area;

[0029] The first oil-free bearing 3 and the second oil-free bearing 9 are fixedly connected to the two ends of the magnetic sleeve 8. The first oil-free bearing 3 and the second oil-free bearing 9 are used to limit the radial freedom of the armature assembly so that the armature assembly can move in the axial direction in the magnetic sleeve 8.

[0030] Please refer to the above structure and process Figure 1-5 .

[0031] This device simplifies the structure of the magnetic sleeve 8 and the armature assembly by cooperating with the first oil-free bearing 3, the second oil-free bearing 9 and the armature assembly, significantly reducing the friction between the magnetic sleeve 8 and the armature assembly, reducing the hysteresis and dispersion of the gearbox solenoid valve, and the simplified sub-components also have better processing consistency, thereby ensuring the consistency of the electromagnetic force of the electromagnetic device during movement, thereby improving the functional consistency of the solenoid valve;

[0032] The design of the axial oil drain hole 701 and the radial oil drain hole 702 in the push rod 7, wherein the radial oil drain hole 702 can be multiple, has a simple structure compared with similar products. By changing the number of radial oil drain holes 702 or the aperture of the oil drain hole 702, the oil drain hole area is changed to achieve adjustable damping, thereby enhancing the deformation ability of the electromagnetic device and reducing processing costs.

[0033] In summary, the structure adopted by the present invention has the advantages of fewer components, simple process, low processing cost, etc., and can also better improve the consistency of the solenoid valve function.

[0034] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to them. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. An electromagnetic device for a transmission solenoid valve, comprising a magnetic housing (1), characterized in that: The inner wall of the magnetic shell (1) is fixedly sleeved with an electromagnetic coil (5), the interior of the electromagnetic coil (5) is fixedly sleeved with a magnetic sleeve (8), the inner wall of the magnetic sleeve (8) is slidably sleeved with an armature assembly, the armature assembly comprises an armature (4) and a push rod (7), the push rod (7) is fixedly sleeved inside the armature (4), the inner wall of one end of the magnetic sleeve (8) is fixedly sleeved with a first oil-free bearing (3), the inner wall of the other end of the magnetic sleeve (8) is fixedly sleeved with a second oil-free bearing (9), both ends of the push rod (7) extend to the outside of the first oil-free bearing (3) and the second oil-free bearing (9), and a through hole is provided on the outer wall of the push rod (7).

2. The electromagnetic device for a transmission solenoid valve according to claim 1, characterized in that: A magnetic gasket (2) is fixedly sleeved on the inner wall of one end of the magnetic shell (1); the inner ring of the magnetic gasket (2) is fixedly connected to the outer wall of the magnetic sleeve (8); and a magnetic washer (6) is fixedly sleeved on the inner wall of the other end of the magnetic shell (1).

3. The electromagnetic device for a transmission solenoid valve according to claim 1, characterized in that: The magnetic sleeve (8) is in the shape of an integrally machined annular sleeve.

4. The electromagnetic device for a transmission solenoid valve according to claim 1, characterized in that: The armature (4) and the push rod (7) are fixedly connected in the form of interference fit.

5. The electromagnetic device for a transmission solenoid valve according to claim 1, characterized in that: The push rod (7) is a cylinder. An axial oil drain hole (701) is provided at the end of the push rod (7). A radial oil drain hole (702) is provided on the side wall of the push rod (7). The axial oil drain hole (701) is connected to the radial oil drain hole (702). There is at least one radial oil drain hole (702).

Images