EGR (Exhaust Gas Recirculation) lift valve single spring guide structure

Abstract

The utility model discloses an EGR lift valve single spring guide structure which comprises a gear, a bearing, a guide block, a spring, a magnet, a sensor assembly, a valve rod, a cam and a guide column, the gear is rotationally arranged in a valve body, the cam is arranged on the outer end face of the gear, and the cam and the gear are coaxial; the guide column is arranged in the direction perpendicular to the valve rod, one end of the guide column is connected with the valve deck, and the other end of the guide column is slidably connected with the side, facing the valve deck, of the guide block. The technical effects are achieved as follows: the magnet is arranged on the guide block support arm, so that the internal structure of the valve body is more compact, and meanwhile, the assembly is convenient; the guide column and the guide block are used in cooperation, the guide column plays a limiting role, the movement direction of the guide block can be stable, magnet shaking and unqualified linearity caused by the fact that a guide block supporting arm is affected by torsion in the operation process are avoided, it can be effectively guaranteed that output signals of the sensor assembly are stable, and the linearity is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of EGR lift valves, in particular to a single spring guide structure of an EGR lift valve. Background Art

[0002] The EGR valve controls the rotation of the motor, opening and closing the valve, through an external electrical signal and position information fed back by an internal sensor. During this process, the magnet on the guide block cooperates with the sensor to provide feedback on the position of the moving component. Linearity is a key indicator of whether the relationship between the sensor's output and input is linear. To ensure a compact structure, the guide mechanism, which operates with a single spring, places the magnet between the spring and the gear on one side, secured by an arm extending from the guide block. When the guide block shifts, the arm is subjected to force, generating torque and causing it to oscillate. This vibration also causes the magnet to vibrate, resulting in unstable sensor output signals and substandard linearity. Therefore, improvements to the guide structure are necessary to improve system stability and ensure proper operation of the EGR valve. Utility Model Content

[0003] To this end, the utility model provides an EGR poppet valve single spring guide structure to solve the above-mentioned problems in the prior art.

[0004] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0005] According to a first aspect of the present invention, a single spring guide structure for an EGR poppet valve includes a gear, a bearing, a guide block, a spring, a magnet, a sensor assembly, a valve stem, a cam, and a guide post, wherein the gear is rotatably disposed within a valve body, the cam is disposed on an outer end surface of the gear, and the cam is coaxial with the gear;

[0006] The bearing is rotatably connected to the guide block via a bearing shaft, and the outer ring of the bearing is in rolling connection with the outer periphery of the cam; the outer end surface of the gear is provided with an arcuate guide rail, the arcuate guide rail is coaxial with the cam, the bearing shaft is perpendicular to the outer end surface of the gear, and one end of the bearing shaft facing the outer end surface of the gear is in rolling connection with the inner concave side wall of the arcuate guide rail;

[0007] The guide block is provided with a support arm, the magnet is arranged on the support arm, the sensor assembly is arranged in the valve cover, and the sensor assembly and the magnet are arranged corresponding to each other;

[0008] The valve stem is vertically arranged, and the top of the valve stem is connected to the guide block. The spring is sleeved on the valve stem, and the top of the spring abuts against the guide block.

[0009] The guide column is arranged in a direction perpendicular to the valve stem, one end of the guide column is connected to the valve cover, and the other end of the guide column is slidably connected to the guide block toward one side of the valve cover.

[0010] Furthermore, a convex edge is provided on a side of the guide block facing the valve cover, the convex edge is vertically arranged, and a side wall of an end of the guide column away from the valve cover is slidably connected to the convex edge.

[0011] Furthermore, a sliding groove is provided on a side of the guide block facing the valve cover, the sliding groove is vertically arranged, and an end of the guide column facing away from the valve cover is slidably arranged in the sliding groove.

[0012] Furthermore, the guide column and the valve cover are an integral structure.

[0013] Furthermore, a mounting groove is provided on a side of the support arm away from the outer end surface of the gear, and the magnet is arranged in the mounting groove.

[0014] Furthermore, the gear is provided with a gear shaft, and the gear is rotatably arranged in the valve body via the gear shaft.

[0015] Furthermore, the cam, the arc-shaped guide rail and the gear are an integrated structure.

[0016] The utility model has the following advantages: the magnet is arranged on the guide block arm, which makes the internal structure of the valve body more compact and easy to assemble; the guide column and the guide block are used in conjunction with each other, and the guide column plays a limiting role, which can make the movement direction of the guide block stable, and avoid the guide block arm being affected by torsion during operation, causing the magnet to shake and linearity to be unqualified, which can effectively ensure the stability of the output signal of the sensor component and ensure linearity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely illustrative, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed in the specification and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes shall remain within the scope of the technical contents disclosed in this utility model without affecting the efficacy and objectives that can be achieved by the present utility model.

[0019] Figure 1 This is a front structural schematic diagram of a single spring guide structure of an EGR poppet valve provided in some embodiments of the present invention.

[0020] Figure 2 A schematic side view of a single spring guide structure of an EGR poppet valve provided in some embodiments of the present invention.

[0021] Figure 3 A three-dimensional diagram of a single spring guide structure of an EGR poppet valve provided in some embodiments of the present invention from a first perspective.

[0022] Figure 4 A stereoscopic view of a single spring guide structure of an EGR lift valve provided in some embodiments of the present invention from a second perspective.

[0023] In the figure: 1. Valve cover, 2. Gear, 3. Gear shaft, 4. Bearing, 5. Bearing shaft, 6. Guide block, 7. Spring, 8. Magnet, 9. Sensor assembly, 10. Valve stem, 11. Cam, 12. Guide column, 13. Arc guide rail. DETAILED DESCRIPTION

[0024] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can readily understand the other advantages and benefits of the present invention from the contents disclosed in this specification. Obviously, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0025] Example 1

[0026] like Figures 1 to 4 As shown, an EGR poppet valve single spring guide structure in an embodiment of the first aspect of the present utility model includes a gear 2, a bearing 4, a guide block 6, a spring 7, a magnet 8, a sensor assembly 9, a valve stem 10, a cam 11 and a guide column 12. The gear 2 is rotatably arranged in the valve body, and the cam 11 is arranged on the outer end surface of the gear 2, and the cam 11 is coaxial with the gear 2.

[0027] The bearing 4 is rotatably connected to the guide block 6 via the bearing shaft 5. The outer ring of the bearing 4 is in rolling connection with the outer periphery of the cam 11. The outer end face of the gear 2 is provided with an arcuate guide rail 13, which is coaxial with the cam 11. The bearing shaft 5 is perpendicular to the outer end face of the gear 2. The end of the bearing shaft 5 facing the outer end face of the gear 2 is in rolling connection with the concave side wall of the arcuate guide rail 13. The cam 11, the arcuate guide rail 13 and the gear 2 are an integrated structure.

[0028] A support arm is provided on the guide block 6, and the support arm is arranged in a direction parallel to the outer end surface of the gear 2. The magnet 8 is arranged on the support arm. Specifically, a mounting groove is provided on the side of the support arm away from the outer end surface of the gear 2. The magnet 8 is arranged in the mounting groove. The sensor assembly 9 is arranged in the valve cover 1. The sensor assembly 9 and the magnet 8 are arranged corresponding to each other. During operation, the sensor assembly 9 determines the opening and closing state of the poppet valve by sensing the position of the magnet 8;

[0029] The valve stem 10 is vertically arranged, and the top of the valve stem 10 is connected to the guide block 6. The spring 7 is sleeved on the valve stem 10, and the top of the spring 7 abuts against the guide block 6.

[0030] The guide column 12 is arranged in a direction perpendicular to the valve stem 10 , one end of the guide column 12 is connected to the valve cover 1 , and the other end of the guide column 12 is slidably connected to the side of the guide block 6 arm toward the valve cover 1 .

[0031] In this embodiment, it should be noted that the guide column 12 and the valve cover 1 are an integral structure. Specifically, the guide column 12 and the valve cover 1 are integrally injection molded, and the gear 2 is provided with a gear shaft 3, and the gear 2 is rotatably arranged in the valve body through the gear shaft 3.

[0032] The operating principle of the entire EGR poppet valve is as follows. In this embodiment, the gear 2, cam 11, curved guide rail 13, and bearing 4 form a first-stage reduction transmission. Gear 2 cooperates with the motor to transmit power. When the motor rotates, the cam 11 rotates accordingly, and the bearing 4 moves downward, driving the guide block 6 to move, opening the valve. The EGR poppet valve converts rotational motion into linear motion through the first-stage reduction. The guide block 6 then drives the valve stem 10, thereby opening the EGR poppet valve. The motor then rotates, and the guide block 6 returns to its original position under the action of the rotational force, closing the EGR poppet valve. During this process, the spring 7 below the guide block 6 assists in resetting, and the magnet 8 fixed to the guide block 6 cooperates with the sensor assembly 9 to provide feedback on the motion signal. If the motor loses power and cannot return to its original position, the spring 7 plays a key role, helping the guide block 6 return to its original position, thereby closing the valve port and ensuring system safety. Through careful consideration and optimization of the previous structure, a single spring was installed at the connection between guide block 6 and valve stem 10 for a compact structure and easy installation. Magnet 8 was relocated to the side of spring 7. An arm extended from guide block 6 to the space between gear 2 and spring 7, where magnet 8 was installed. At this time, when the valve is opened or closed, the guide block 6 is displaced by force, generating torque on the arm. The arm will swing while moving up and down, causing magnet 8 to vibrate, affecting the signal transmission of sensor assembly 9 and resulting in unqualified valve linearity. To solve this problem, a guide post 12 was added to the end face of valve cover 1. Guide post 12 cooperates with the arm to limit the displacement direction of guide block 6, ensuring valve linearity.

[0033] The technical effect achieved by this embodiment is: the magnet 8 is set on the arm of the guide block 6, so that the internal structure of the valve body is more compact and easy to assemble; the guide column 12 and the guide block 6 are used in conjunction with each other, and the guide column 12 plays a limiting role, which can stabilize the movement direction of the guide block 6, and avoid the arm of the guide block 6 being affected by the torque during operation, causing the magnet 8 to shake and the linearity to be unqualified, which can effectively ensure the stability of the output signal of the sensor component 9 and ensure linearity.

[0034] Example 2

[0035] like Figures 1 to 4 As shown, this embodiment provides another EGR lift valve single spring guide structure, the structure of which includes all the contents of embodiment 1, and only the different parts are described below.

[0036] In this embodiment, a convex edge is provided on the side of the guide block 6 arm facing the valve cover 1, and the convex edge is vertically arranged. The side wall of the guide column 12 at the end facing away from the valve cover 1 is slidably connected to the convex edge. By setting the convex edge, the moving direction of the guide block 6 can be further limited to ensure that the guide block 6 moves in a straight line direction.

[0037] Example 3

[0038] like Figures 1 to 4 As shown, this embodiment provides another EGR lift valve single spring guide structure, the structure of which includes all the contents of embodiment 1, and only the different parts are described below.

[0039] In this embodiment, a sliding groove is provided on the side of the guide block 6 arm facing the valve cover 1 , the sliding groove is vertically arranged, and the end of the guide column 12 facing away from the valve cover 1 is slidably arranged in the sliding groove.

[0040] In this embodiment, it should be noted that the guide column 12 is a rectangular column and the slide groove is a rectangular slide groove, which can facilitate positioning and installation and effectively limit the movement of the guide block 6 in a straight line direction.

[0041] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, such modifications or improvements, without departing from the spirit of the present invention, are within the scope of protection claimed herein.

[0042] The terms "upper", "lower", "left", "right", "middle", etc. used in this specification are only for the convenience of description and are not intended to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be considered as the scope of implementation of the present invention without substantially changing the technical content.

Claims

1. An EGR poppet valve single spring guide structure, characterized in that: The invention comprises a gear (2), a bearing (4), a guide block (6), a spring (7), a magnet (8), a sensor assembly (9), a valve stem (10), a cam (11) and a guide column (12); the gear (2) is rotatably arranged in the valve body; the cam (11) is arranged on the outer end surface of the gear (2), and the cam (11) is coaxial with the gear (2); The bearing (4) is rotatably connected to the guide block (6) via a bearing shaft (5), and the outer ring of the bearing (4) is in rolling connection with the outer periphery of the cam (11); an arcuate guide rail (13) is provided on the outer end surface of the gear (2), and the arcuate guide rail (13) is coaxial with the cam (11); the bearing shaft (5) is perpendicular to the outer end surface of the gear (2), and one end of the bearing shaft (5) facing the outer end surface of the gear (2) is in rolling connection with the concave side wall of the arcuate guide rail (13); The guide block (6) is provided with a support arm, the magnet (8) is arranged on the support arm, the sensor assembly (9) is arranged in the valve cover (1), and the sensor assembly (9) and the magnet (8) are arranged corresponding to each other; The valve stem (10) is vertically arranged, and the top of the valve stem (10) is connected to the guide block (6); the spring (7) is sleeved on the valve stem (10), and the top of the spring (7) abuts against the guide block (6); The guide column (12) is arranged in a direction perpendicular to the valve stem (10), one end of the guide column (12) is connected to the valve cover (1), and the other end of the guide column (12) is slidably connected to the guide block (6) toward one side of the valve cover (1).

2. The EGR poppet valve single spring guide structure according to claim 1, characterized in that: The guide block (6) is provided with a convex edge on one side facing the valve cover (1), and the convex edge is arranged vertically. The side wall of the guide column (12) at one end facing away from the valve cover (1) is slidably connected to the convex edge.

3. The single spring guide structure for an EGR poppet valve according to claim 1, characterized in that: The guide block (6) is provided with a slide groove on one side facing the valve cover (1), the slide groove is vertically arranged, and the end of the guide column (12) facing away from the valve cover (1) is slidably arranged in the slide groove.

4. The single spring guide structure for an EGR poppet valve according to claim 1, characterized in that: The guide column (12) and the valve cover (1) are an integral structure.

5. The single spring guide structure for an EGR poppet valve according to claim 1, characterized in that: A mounting groove is provided on the side of the support arm facing away from the outer end surface of the gear (2), and the magnet (8) is arranged in the mounting groove.

6. The single spring guide structure for an EGR poppet valve according to claim 1, characterized in that: The gear (2) is provided with a gear shaft (3), and the gear (2) is rotatably arranged in the valve body via the gear shaft (3).

7. The EGR poppet valve single spring guide structure according to any one of claims 1 to 6, characterized in that: The cam (11), the arc-shaped guide rail (13) and the gear (2) are an integrated structure.

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