A rodless OCV valve

Abstract

This utility model provides a rodless OCV valve, including a valve body, a return spring, a valve core, a reversing rod, and an electromagnetic drive device. The upper end of the electromagnetic drive device is fixedly connected to the lower end of the valve body. A first sliding cavity is provided at the upper end of the electromagnetic drive device, and the valve core is slidably disposed in the first sliding cavity. The return spring and the reversing rod are arranged sequentially from top to bottom in the valve body. The reversing rod slides and engages with the valve body. The upper end of the return spring abuts against the inner wall of the valve body, and the lower end abuts against the reversing rod. The electromagnetic drive device is used to drive the valve core to move toward the valve body when energized. The characteristic feature is that the lower end of the reversing rod extends downward and abuts against the upper end of the valve core. The lower end of the valve body has a limiting part for preventing the valve core from moving further upward after it has moved an upward distance by a preset distance. This utility model simplifies the traditional rod structure, and the structural design is more reasonable.

Description

Technical Field

[0001] This utility model relates to OCV valves, and more particularly to a rodless OCV valve. Background Technology

[0002] The engine system controls the changes in the OCV valve oil passage to advance or lag the cam phase adjuster, thereby controlling the timing and intake air volume to bring the engine to its optimal operating condition.

[0003] For example, invention patent CN105697079A discloses an OCV valve structure. In this patent, a push rod is fixedly sleeved inside the valve core to move synchronously with it. However, due to the push rod's length, assembly errors and part clearances can cause it to exert a radial force on the valve core, leading to uneven wear between the valve core and the inner sleeve. This problem urgently needs to be solved. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a rodless OCV valve, which simplifies the traditional rod structure and makes the structural design more reasonable.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A rodless OCV valve includes a valve body, a return spring, a valve core, a reversing rod, and an electromagnetic drive device. The upper end of the electromagnetic drive device is fixedly connected to the lower end of the valve body. A first sliding cavity is provided at the upper end of the electromagnetic drive device, and the valve core is slidably disposed within the first sliding cavity. The return spring and the reversing rod are sequentially disposed within the valve body from top to bottom. The reversing rod slides in cooperation with the valve body. The upper end of the return spring abuts against the inner wall of the valve body, and the lower end abuts against the reversing rod. The electromagnetic drive device is used to drive the valve core to move toward the valve body when energized. The lower end of the reversing rod extends downward and abuts against the upper end of the valve core. The lower end of the valve body has a limiting part for preventing the valve core from moving further upward after it has moved upward a preset distance.

[0007] Preferably, the reversing rod includes a rod body, an upper sliding ring is provided at the upper end of the rod body, and a lower sliding ring is provided at the middle position. The outer diameter of the upper sliding ring and the lower sliding ring is larger than that of the rod body. Both the upper sliding ring and the lower sliding ring slide and cooperate with the inner wall of the valve body.

[0008] Preferably, the middle part of the valve body forms a second sliding cavity, and the lower part forms a connecting cavity, the inner diameter of which is smaller than that of the second sliding cavity; an oil passage hole is provided through the outer wall of the rod body and below the sliding ring.

[0009] Preferably, a bracket is fixedly provided at the upper end of the electromagnetic drive device, and the lower end of the valve body is fixedly sleeved on the bracket.

[0010] Preferably, the limiting part is a convex ring.

[0011] Preferably, the reversing rod and the valve core are both arranged vertically through each other; the upper end of the valve body is open, and a filter cover is provided at the opening, the filter cover having several fine holes.

[0012] The main technical effects of this utility model are reflected in the following aspects:

[0013] The push rod component in the traditional OCV valve has been removed, and the reversing rod directly abuts against the valve core, thereby eliminating the corresponding defects. Attached Figure Description

[0014] Figure 1 This is an exploded view of the OCV valve without a push rod in the embodiment.

[0015] Figure 2 This is a cross-sectional view of the rodless OCV valve in the embodiment.

[0016] Reference numerals: 1. Filter cover; 2. Return spring; 3. Valve body; 31. Oil passage A; 32. Oil passage P; 33. Oil passage B; 34. Second sliding chamber; 35. Connecting chamber; 36. Conical surface; 37. Convex ring; 4. First O-ring; 5. Reversing rod; 51. Rod body; 52. Upper sliding ring; 53. Lower sliding ring; 54. Oil passage hole; 6. Bracket; 7. Second O-ring; 8. Valve core; 9. Electromagnetic drive device; 91. First sliding chamber. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0018] Reference Figure 1 , Figure 2 This embodiment aims to provide a rodless OCV valve, including a valve body 3, a return spring 2, a valve core 8, a reversing rod 5, and an electromagnetic drive device 9.

[0019] The reset spring 2 and the reversing rod 5 are arranged sequentially from top to bottom inside the valve body 3.

[0020] The surface of the valve body 3 is provided with oil passages A 31, P 32 and B 33 at intervals from top to bottom. The upper end of the valve body 3 is open, and a filter cover 1 is provided at the opening, which has several fine holes. The upper end of the return spring 2 abuts against a spring seat formed on the inner wall of the valve body 3, and the lower end abuts against the reversing rod 5.

[0021] The outer wall of the valve body 3 is fitted with a first O-ring 4, which can increase the sealing performance after installation.

[0022] A bracket 6 is fixedly mounted on the upper end of the electromagnetic drive device 9, and the valve body 3 is fixedly sleeved on the bracket 6. Specifically, the valve body 3 can be pressed into the bracket 6 by a riveting process. A second O-ring 7 is provided between the lower end of the valve body 3 and the upper end of the electromagnetic drive device 9 to increase the sealing performance.

[0023] The upper end of the electromagnetic drive device 9 is provided with a first sliding cavity 91, and the valve core 8 is slidably disposed in the first sliding cavity 91. The electromagnetic drive device 9 is used to drive the valve core 8 to move toward the valve body 3 when energized.

[0024] The middle part of the valve body 3 forms a second sliding cavity 34, and the lower part forms a connecting cavity 35. The inner diameter of the connecting cavity 35 is smaller than that of the second sliding cavity 34. A conical surface 36 is formed at the junction of the second sliding cavity 34 and the connecting cavity 35.

[0025] An oil passage 54 is provided through the outer wall of the rod body 51 and below the sliding ring 53, so that when the reversing rod 5 moves upward, the oil in the P oil passage 32 can enter the open A oil passage 31 through this oil passage 54.

[0026] The reversing lever 5 includes a lever body 51, with an upper sliding ring 52 at the upper end and a lower sliding ring 53 at the middle position. The outer diameters of the upper sliding ring 52 and the lower sliding ring 53 are larger than those of the lever body 51. Both the upper sliding ring 52 and the lower sliding ring 53 slide against the inner wall of the valve body 3.

[0027] When the reversing lever 5 moves up and down, it can change the connection between oil passage A 31, oil passage P 32 and oil passage B 33, thereby controlling the direction of the oil circuit. This is existing technology and will not be described in detail in this embodiment.

[0028] The lower end of the reversing lever 5 extends downward and abuts against the upper end of the valve core 8; the lower end of the valve body 3 has a limiting part for preventing the valve core 8 from moving further upward after it has moved upward a preset distance, and this limiting part is a convex ring 37. By providing the convex ring 37, the upward stroke of the valve core 8 can be limited.

[0029] When the electromagnetic drive device 9 is energized, it can drive the valve core 8 to move upward, that is, move towards the valve body 3, thereby driving the reversing rod 5 to move upward; when the electromagnetic drive device 9 is de-energized, the reset spring 2 pushes the reversing rod 5 downward, thereby driving the valve core 8 to move downward and reset.

[0030] The reversing lever 5 and the valve core 8 are both arranged vertically through each other; the upper end of the valve body 3 is open, and a filter cover 1 is provided at the opening, with several fine holes on the filter cover 1. In this way, external engine oil can smoothly enter and exit the first sliding chamber 91, avoiding back pressure and allowing the valve core 8 to slide smoothly up and down.

[0031] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A rodless OCV valve, comprising a valve body (3), a return spring (2), a valve core (8), a reversing rod (5), and an electromagnetic drive device (9); the upper end of the electromagnetic drive device (9) is fixedly connected to the lower end of the valve body (3); the upper end of the electromagnetic drive device (9) is provided with a first sliding cavity (91), and the valve core (8) is slidably disposed in the first sliding cavity (91); the return spring (2) and the reversing rod (5) are arranged sequentially from top to bottom in the valve body (3); the reversing rod (5) is slidably engaged with the valve body (3); the upper end of the return spring (2) abuts against the inner wall of the valve body (3), and the lower end abuts against the reversing rod (5); the electromagnetic drive device (9) is used to drive the valve core (8) to move toward the valve body (3) when energized; characterized in that, The lower end of the reversing rod (5) extends downward and abuts against the upper end of the valve core (8); the lower end of the valve body (3) has a limiting part for preventing the valve core (8) from moving upward after it has moved up a preset distance.

2. A poppet-less OCV valve according to claim 1, characterized in that, The reversing rod (5) includes a rod body (51), an upper sliding ring (52) is provided at the upper end of the rod body (51), and a lower sliding ring (53) is provided at the middle position. The outer diameter of the upper sliding ring (52) and the lower sliding ring (53) is larger than that of the rod body (51). The upper sliding ring (52) and the lower sliding ring (53) are both slidingly engaged with the inner wall of the valve body (3).

3. An OCV valve according to claim 2, characterized in that The valve body (3) has a second sliding cavity (34) formed in the middle part of its interior and a connecting cavity (35) formed at the lower end. The inner diameter of the connecting cavity (35) is smaller than that of the second sliding cavity (34). An oil passage hole (54) is provided through the outer wall of the rod body (51) and located below the sliding ring (53).

4. An OCV valve according to claim 1, characterized in that The upper end of the electromagnetic drive device (9) is fixedly provided with a bracket (6), and the lower end of the valve body (3) is fixedly sleeved on the bracket (6).

5. A poppet-less OCV valve according to claim 1, wherein, The limiting part is a convex ring (37).

6. An OCV valve according to any one of claims 1-5, characterized in that The reversing rod (5) and the valve core (8) are both arranged vertically; the upper end of the valve body (3) is open, and a filter cover (1) is provided at the opening, and the filter cover (1) has several fine holes.

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