Automatic transmission switch electromagnetic valve

Abstract

The utility model relates to the technical field of eye protection lamps, in particular to an automatic transmission switch electromagnetic valve which comprises a valve body, a shell and a base. The base is arranged in the shell, the outer wall of the base is sleeved with the coil, one end of the coil is inserted into the shell, one end of the valve body is fixedly connected to an opening of the shell, a pit is formed in the end face of one side of the valve body, a filter screen is arranged in the pit, and a radial groove is formed in the side end face of the valve body. A radial groove is formed in the valve body and forms an oil outlet T, an inner cavity is formed in the center of the radial groove in the axial direction, an annular groove is formed in the outer side of the valve body, one or more oil outlet holes A are formed in the annular groove, the oil outlet holes A penetrate through the inner cavity, a steel ball seat is arranged in the valve body, and the oil outlet holes A are communicated with the steel ball seat. The iron core structure mainly comprises the base, the yoke sleeve and the iron core, the base, the yoke sleeve and the iron core are all simple and easy to form, and the effects that the structure is optimized and the manufacturing cost is reduced are achieved on the whole.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic transmissions, and particularly relates to a switching solenoid valve for an automatic transmission. Background Art

[0002] An automotive automatic transmission controls the automatic switching of transmission gears by regulating each oil circuit through several switching-type and pressure-regulating solenoid valves on its control board;

[0003] With the automotive industry's increasingly stringent requirements for the comfort, responsiveness, reliability, etc. of automatic transmission shifting, the individual performance of each internal solenoid valve is also more demanding; at the same time, the automotive industry is increasingly squeezing manufacturing costs; the existing structure of the switching solenoid valve is difficult to meet the high-performance requirements under the condition of low manufacturing costs. Content of the Utility Model

[0004] To achieve the above object, the utility model provides the following technical solution: It includes a valve body, a housing, and a base; the base is arranged inside the housing, a coil is sleeved outside the base wall, one end of the coil is inserted inside the housing, one end of the valve body is fixedly connected to the opening part of the housing, a pit is arranged on the end face of one side of the valve body, a filter screen is arranged inside the pit, a radial groove is arranged on the side end face of the valve body, the radial groove forms an oil drain port T, an internal cavity is arranged along the axial direction at the central position of the radial groove, an annular groove is arranged outside the valve body, one or more oil outlet holes A are arranged inside the annular groove, the oil outlet holes A penetrate through to the internal cavity, a ball seat is arranged inside the valve body, and a ball is arranged inside the ball seat, a valve seat is arranged inside the valve body, the valve seat is located below the ball seat, a yoke sleeve is arranged at the tail end of the valve seat, an iron core is arranged inside the yoke sleeve, a spring is arranged inside the iron core, and the tail end of the iron core is inserted inside the coil, a push rod in contact with one end of the spring is arranged inside the iron core, and the other end of the push rod is in contact with the ball.

[0005] Preferably, the filter screen is in a circular sheet shape, a cage is arranged on the outer ring and in the middle of the filter screen, a through hole is arranged at the bottom of the pit, and a bracket is arranged on the outer wall of the housing.

[0006] Preferably, the ball seat includes a first ball seat step and a second ball seat step, holes are arranged at the centers of both the first ball seat step and the second ball seat step, the outer diameter of the first ball seat step is relatively larger than that of the second ball seat step, and the outer diameter of the first ball seat step is in contact with the valve body.

[0007] Preferably, there is a gap between the side wall of the second ball seat step and the valve body, one or more through oil ports are arranged on the side surface of the second ball seat step, and the ball is restricted by the first ball seat step and the end face of the valve seat.

[0008] Preferably, the valve seat is composed of a first valve seat step and a second valve seat step. Holes are provided at the centers of both the first valve seat step and the second valve seat step. The outer diameter of the first valve seat step is relatively smaller than that of the second valve seat step, and the inner hole of the first valve seat step is relatively smaller than that of the second valve seat step. The left end face of the second valve seat step contacts the end face of the second ball seat step. The first valve seat step is arranged inside the second ball seat step and contacts the ball seat. The second valve seat step contacts the valve body.

[0009] Preferably, the yoke sleeve is an overall rotating body with an L-shaped cross-section. The left end face of the yoke sleeve connecting part contacts the connecting end face of the valve body, and the part outside the connecting end of the yoke sleeve is a cylindrical sleeve with an internal cavity.

[0010] Preferably, the iron core can axially displace within the cavity of the yoke sleeve. One end of the iron core has a relatively larger outer diameter. A first concave pit is provided inwardly on the left end face of the iron core, and a second concave pit is provided inwardly on the right end face of the iron core. The spring is located within the second concave pit.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. The on-off solenoid valve controls the opening and closing of the oil circuit through the above response actions to the TCU signal, and further realizes the control of automatic gear shifting of the transmission;

[0013] 2. Each component inside the solenoid valve that affects performance, mainly including the base, yoke sleeve, and iron core, is simple and easy to form, achieving the effects of overall structural optimization and cost reduction in manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is an exploded structural diagram of the present utility model;

[0016] Figure 3 is a schematic sectional plane structural diagram of the present utility model;

[0017] Figure 4 is a schematic sectional plane structural diagram of the present utility model.

[0018] In the figure: 1, filter screen; 2, valve body; 3, ball seat; 4, ball; 5, valve seat; 6, yoke sleeve; 7, ejector rod; 8, iron core; 9, spring; 10, coil; 11, base; 12, housing; 13, filter screen holder; 15, annular groove; 16, oil outlet A; 17, drain port T; 19, first valve seat step; 20, second valve seat step; 21, radial groove; 22, first ball seat step; 23, second ball seat step. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Embodiment

[0021] Please refer to Figures 1-4 , in the illustration: This embodiment is a preferred implementation manner in this technical solution. An automatic transmission switch solenoid valve includes a valve body 2, a housing 12, and a base 11; the base 11 is arranged inside the housing 12, a coil 10 is sleeved on the outer wall of the base 11, one end of the coil 10 is inserted inside the housing 12, one end of the valve body 2 is fixedly connected to the opening part of the housing 12, a concave pit is arranged on the end face of one side of the valve body 2, a filter screen 1 is arranged in the concave pit, a radial groove 21 is arranged on the side end face of the valve body 2, the radial groove 21 forms an oil drain port T17, an internal cavity is arranged along the axial direction at the central position of the radial groove 21, an annular groove 15 is arranged on the outside of the valve body 2, one or more oil outlet holes A16 are arranged in the annular groove 15, and the oil outlet holes A16 penetrate through to the internal cavity. A ball seat 3 is arranged inside the valve body 2, and a ball 4 is arranged inside the ball seat 3. A valve seat 5 is arranged inside the valve body 2, the valve seat 5 is located below the ball seat 3, a yoke sleeve 6 is arranged at the tail end of the valve seat 5, an iron core 8 is arranged inside the yoke sleeve 6, a spring 9 is arranged inside the iron core 8, and the tail end of the iron core 8 is inserted into the coil 10. A push rod 7 in contact with one end of the spring 9 is arranged inside the iron core 8, and the other end of the push rod 7 is in contact with the ball 4. Among them, the coil 10 is a winding of enameled copper wire, the entire surface of the coil 10 is wrapped by nylon plastic, and it is in a cylindrical shape with a through cavity inside. The left end face of the coil 10 is in contact with the right end face of the connection end of the yoke sleeve 6. The sleeve part of the yoke sleeve 6, the large-end step of the iron core 8, and the small-end part of the base 11 are arranged inside the cavity of the coil 10. A connector is arranged on the outside of the coil 10 near the valve body 2 end, and two terminals are arranged inside the connector.

[0022] As Figure 1 、 2 shown, the filter screen 1 is in a circular sheet shape, a cage 13 is arranged on the outer ring and in the middle of the filter screen 1, a through hole is arranged at the bottom of the concave pit, a bracket 18 is arranged on the outer wall of the housing 12, and the cage 13 arranged on the outer ring of the filter screen 1 is used to support the filter screen 1 to be installed at the port of the valve body 2.

[0023] As Figure 1 、4 As shown, the ball seat 3 includes a first ball seat step 22 and a second ball seat step 23. Holes are provided at the centers of both the first ball seat step 22 and the second ball seat step 23. The outer diameter of the first ball seat step 22 is relatively larger than that of the second ball seat step 23. The outer diameter of the first ball seat step 22 is in contact with the valve body 2. The ball seat 3 is respectively at both ends of the first ball seat step 22 and the second ball seat step 23, facilitating contact and connection with the valve body 2, making the connection more firm and stable.

[0024] As Figure 2 、 4 shown, there is a gap between the side wall of the second ball seat step 23 and the valve body 2. One or more through oil ports are provided on the side of the second ball seat step 23. The ball 4 is restricted by the first ball seat step 22 and the end face of the valve seat 5. Through the cooperation between the first ball seat step 22 and the valve seat 5, the ball 4 is limited and constrained, enabling the ball 4 to work better.

[0025] As Figure 2 、 4 shown, the valve seat 5 is composed of a first valve seat step 19 and a second valve seat step 20. Holes are provided at the centers of both the first valve seat step 19 and the second valve seat step 20. The outer diameter of the first valve seat step 19 is relatively smaller than that of the second valve seat step 20. The inner hole of the first valve seat step 19 is relatively smaller than that of the second valve seat step 20. The left end face of the second valve seat step 20 is in contact with the end face of the second ball seat step 23. The first valve seat step 19 is arranged inside the second ball seat step 23 and is in contact with the ball seat 3. The second valve seat step 20 is in contact with the valve body 2.

[0026] As Figure 1 、 3 shown, the yoke sleeve 6 is an overall rotating body with an L-shaped cross-section. The left end face of the connecting part of the yoke sleeve 6 is in contact with the connecting end face of the valve body 2. The part of the yoke sleeve 6 other than the connecting end is a cylindrical sleeve with an internal cavity.

[0027] As Figure 2 、 4 shown, the iron core 8 can axially displace within the cavity of the yoke sleeve 6. One end of the iron core 8 has a relatively larger outer diameter. A first pit is provided inwardly on the left end face of the iron core 8. A second pit is provided inwardly on the right end face of the iron core 8. The spring 9 is located within the second pit.

[0028] In this embodiment, first, all parts are installed. This automatic transmission switch solenoid valve receives the electric signal from the automatic transmission TCU through the terminal on the coil 10 connector, and converts the electric signal into a magnetic field; the part base 11, yoke sleeve 6, iron core 8, and housing 12 around the coil 10 generate interacting electromagnetic forces under the action of its magnetic field. Among them, the iron core 8 moves axially towards the base 11 under the action of the electromagnetic force, thereby moving the push rod 7 against the force of the spring 9 towards the base 11. According to the magnitude of the electric signal input by the TCU and in cooperation with the elastic force of the spring 9, the push rod 7 can be made to hold against the steel ball 4 or released.

[0029] The through hole at the bottom of the concave pit on the end face of the valve body 2 of this switch solenoid valve is the oil inlet P, and the oil pressure is input into the interior of this solenoid valve from here and then enters the inner hole of the first step 22 of the steel ball seat.

[0030] When the electric signal input by the TCU is relatively low, this solenoid valve is in the initial closed state. The iron core 8 is pushed left by the spring 9 under the relatively small action of the electromagnetic force, and the steel ball 4 is also pushed to the left side of the inner cavity of the steel ball seat 3. The central hole of the first step 22 of the steel ball seat is closed, and the oil pressure is blocked here, and the oil inlet circuit is closed; the oil pressure at the position of the oil outlet A16 can enter the inner chamber of the second step 23 of the steel ball seat, and the oil pressure flows along the inner hole of the first step 19 of the valve seat to the oil drain port T17 of the flange end groove of the valve body 2 and is discharged from the outside of the oil drain port T17.

[0031] When the electric signal input by the TCU is relatively high, this solenoid valve is in the activated open state. The iron core 8 moves towards the base 11 under the action of the electromagnetic force, overcoming the elastic force of the spring 9. The steel ball 4 is released from the inner hole of the first step 22 of the steel ball seat. The outside oil pressure enters the inner chamber of the valve body 2 from the oil inlet P and flows towards the oil outlet A16. The oil inlet circuit is opened, and the steel ball 4 is pushed to the right by the oil pressure input from the oil inlet P and holds against the central hole of the first step 19 of the valve seat, and the oil drain circuit is closed.

[0032] The switch solenoid valve realizes the control of the opening and closing of the oil circuit through the above response actions to the TCU signal, and further realizes the control of the automatic shift of the transmission gear.

[0033] The various components inside this solenoid valve that affect its performance, mainly including the base 11, yoke sleeve 6, and iron core 8, are all simple and easy to form, achieving the effect of structural optimization and cost compression as a whole.

[0034] The above content further elaborates on the present invention in combination with specific implementation manners. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope determined by the claims submitted for the present invention.

Claims

1. An automatic transmission switch solenoid valve, comprising a valve body (2), a housing (12), and a base (11); characterized in that: The base (11) is arranged inside the housing (12). A coil (10) is sleeved on the outer wall of the base (11). One end of the coil (10) is inserted into the housing (12). One end of the valve body (2) is fixedly connected to the opening part of the housing (12). A pit is arranged on the end face on one side of the valve body (2). A filter screen (1) is arranged in the pit. A radial groove (21) is arranged on the side end face of the valve body (2). The radial groove (21) forms an oil drain port T (17). An internal chamber is arranged along the axial direction at the central position of the radial groove (21). An annular groove (15) is arranged on the outer side of the valve body (2). One or more oil outlet holes A (16) are arranged in the annular groove (15). The oil outlet holes A (16) penetrate through to the internal chamber. A ball seat (3) is arranged inside the valve body (2), and a ball (4) is arranged inside the ball seat (3). A valve seat (5) is arranged inside the valve body (2). The valve seat (5) is located below the ball seat (3). A yoke sleeve (6) is arranged at the tail end of the valve seat (5). An iron core (8) is arranged inside the yoke sleeve (6). A spring (9) is arranged inside the iron core (8). The tail end of the iron core (8) is inserted into the coil (10). A push rod (7) in contact with one end of the spring (9) is arranged inside the iron core (8), and the other end of the push rod (7) is in contact with the ball (4).

2. The automatic transmission switch solenoid valve according to claim 1, wherein: The filter screen (1) is in a circular sheet shape. A cage (13) is arranged on the outer ring and in the middle of the filter screen (1). A through hole is arranged at the bottom of the pit. A bracket (18) is arranged on the outer wall of the housing (12).

3. The automatic transmission switch solenoid valve according to claim 1, characterized in that: The ball seat (3) includes a first ball seat step (22) and a second ball seat step (23). Holes are arranged at the centers of both the first ball seat step (22) and the second ball seat step (23). The outer diameter of the first ball seat step (22) is relatively larger than that of the second ball seat step (23). The outer diameter of the first ball seat step (22) is in contact with the valve body (2).

4. An automatic transmission switch solenoid valve according to claim 3, characterized in that: A gap exists between the side wall of the second ball seat step (23) and the valve body (2). One or more through oil ports are arranged on the side surface of the second ball seat step (23). The ball (4) is restricted by the end faces of the first ball seat step (22) and the valve seat (5).

5. The automatic transmission switch solenoid valve according to claim 3, characterized in that: The valve seat (5) is composed of a first valve seat step (19) and a second valve seat step (20). Holes are arranged at the centers of both the first valve seat step (19) and the second valve seat step (20). The outer diameter of the first valve seat step (19) is relatively smaller than that of the second valve seat step (20). The inner hole of the first valve seat step (19) is relatively smaller than that of the second valve seat step (20). The left end face of the second valve seat step (20) is in contact with the end face of the second ball seat step (23). The first valve seat step (19) is arranged inside the second ball seat step (23) and is in contact with the ball seat (3). The second valve seat step (20) is in contact with the valve body (2).

6. The automatic transmission switch solenoid valve according to claim 1, characterized in that: The yoke sleeve (6) is an overall rotating body with an L-shaped cross-section. The left end face of the connecting part of the yoke sleeve (6) is in contact with the connecting end face of the valve body (2). The part of the yoke sleeve (6) other than the connecting end is a cylindrical sleeve with an internal cavity.

7. An automatic transmission switch solenoid valve according to claim 1, characterized in that: The iron core (8) can axially displace within the cavity of the yoke sleeve (6). One end of the iron core (8) has a larger outer diameter. A first concave pit is provided inward on the left end face of the iron core (8), and a second concave pit is provided inward on the right end face of the iron core (8). The spring (9) is located within the second concave pit.

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