Rocker arm mechanism and electromagnetic valve

Abstract

The invention provides a rocker arm mechanism and an electromagnetic valve, and belongs to the technical field of mechanical equipment. The transmission part comprises a first ejector rod and a second ejector rod which are arranged in the rocker arm cover, and the first ejector rod and the second ejector rod can only move in the linear direction; the rocker is rotationally connected with the rocker cover, the two ends of the rocker are connected with the first ejector rod and the second ejector rod respectively, a sliding groove is formed in one of the first ejector rod, the second ejector rod and the rocker in the transmission piece, the sliding groove is perpendicular to the moving direction of the first ejector rod, and a transmission part is arranged on the other one of the first ejector rod, the second ejector rod and the rocker and is in sliding fit with the sliding groove; the invention has the advantages that a sliding connection structure is formed among the rocker, the first ejector rod and the second ejector rod instead of a hinging mode in a traditional structure. In the swinging process of the rocker, the first ejector rod and the second ejector rod can only move in the linear direction without generating lateral displacement, so that the problem of transverse shaking of the ejector rods caused by hinging is effectively avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical equipment, and in particular relates to a rocker arm mechanism and a solenoid valve. Background Art

[0002] Rocker mechanisms are commonly used in solenoid valves, pneumatic actuators, and other automated control devices to change motion direction or transmit force. Traditional rocker mechanisms typically consist of a rocker and a push rod assembly. The middle portion of the rocker is pivotally connected to the rocker cover, while one end of the rocker is connected to the push rod via a hinged structure. This drives the push rod in linear reciprocating motion, thereby opening and closing the valve.

[0003] However, in practical applications, the hinged connection between the rocker and the push rod presents certain structural flaws. Because the hinged structure allows for a certain degree of angular offset between the rocker and the push rod, the rocker's swing can easily cause the push rod to shift laterally or wobble. This lateral movement not only affects the precision and stability of the push rod's movement but can also cause problems such as poor sealing, increased wear, and delayed response. These issues are particularly prominent in applications involving high-frequency operation or high-precision control. Summary of the Invention

[0004] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to propose a rocker arm mechanism in which a rocker arm drives a push rod to move only in a straight line.

[0005] The object of the present invention can be achieved through the following technical solutions: A rocker arm mechanism, comprising:

[0006] rocker cover;

[0007] a transmission member comprising a first push rod and a second push rod disposed in the rocker cover, wherein the first push rod and the second push rod can only move in a straight line direction;

[0008] A rocker, the rocker is rotatably connected to the rocker arm cover, and the two ends of the rocker are respectively connected to the first push rod and the second push rod, and a slide groove is provided on one of the first push rod, the second push rod and the rocker in the transmission member, and the slide groove is perpendicular to the moving direction of the first push rod, and a transmission part is provided on the other to slide with the slide groove.

[0009] In the above-mentioned rocker arm mechanism, the first push rod and the second push rod are both provided with a sliding groove, and transmission parts are fixedly provided at both ends of the rocker arm.

[0010] In the above-mentioned rocker arm mechanism, the transmission part extends into the slide groove, and when the rocker arm rotates, the transmission part can also move along the extension direction of the slide groove; there is a gap between the rocker arm and the groove wall of the slide groove.

[0011] In the above-mentioned rocker arm mechanism, the transmission part includes transmission balls fixedly arranged at both ends of the rocker, the transmission balls extend into the slide groove, and are in contact with the groove wall of the slide groove and can move relative to the slide groove.

[0012] In the above-mentioned rocker arm mechanism, two limiting grooves extending in a straight direction are provided on the rocker arm cover, the first push rod and the second push rod are respectively arranged in the corresponding limiting grooves, and the first push rod and the second push rod can slide relative to the limiting grooves, and an opening is provided on the side of the limiting groove, and the rocker arm extends into the sliding groove through the opening.

[0013] A solenoid valve comprises the rocker arm mechanism mentioned above.

[0014] In the above-mentioned solenoid valve, it also includes a shell, a mounting cavity is provided in the shell, the rocker arm mechanism is fixedly provided in the mounting cavity, a diaphragm is provided in the shell and is fixedly connected to the first push rod and the second push rod, and an inwardly concave arc portion is provided on the rocker arm cover around the moving axis of the first push rod and the second push rod, and the inwardly concave arc portion can be against the diaphragm to limit the moving stroke of the diaphragm.

[0015] In the above-mentioned solenoid valve, a folded protrusion is provided on the diaphragm around the moving axis of the first push rod and the second push rod.

[0016] In the above-mentioned solenoid valve, an abutment deformation portion is provided on one side of the diaphragm along the peripheral edge of the diaphragm, and two convex deformation portions with a gap in the middle are provided on the other side of the diaphragm. A rocker arm seat is also provided in the shell, and a diaphragm mounting cavity is formed when the rocker arm seat and the rocker arm cover are fixed. The diaphragm is located in the diaphragm mounting cavity, and when the rocker arm seat is connected to the rocker arm cover, the abutment deformation portion is provided in the mounting ring groove on the rocker arm seat, and the rocker arm cover is in contact with the convex deformation portion, thereby squeezing the abutment deformation portion and the convex deformation portion.

[0017] In the above-mentioned solenoid valve, the rocker arm seat is provided with an inlet connected to the diaphragm mounting cavity, and the surface of the rocker arm seat is a concave surface, and the inlet is located at the center of the concave surface.

[0018] Compared with the prior art, the present invention has the following advantages: by providing a sliding groove on one of the rocker and the first or second push rod in the transmission unit, and providing a transmission portion on the other that slidably cooperates with the sliding groove, a sliding connection structure is formed between the rocker and the first or second push rods, rather than a hinged connection as in conventional structures. As a result, during the rocker's swing, the first and second push rods can move only in a linear direction without lateral displacement, effectively avoiding lateral shaking of the push rods caused by hinged connections and improving the stability and precision of the push rod movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the rocker cover in the present invention;

[0020] Figure 2 yes Figure 1 Schematic diagram of the cross-section structure;

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the solenoid valve;

[0022] Figure 4 yes Figure 3 Schematic diagram of the cross-section structure;

[0023] Figure 5 yes Figure 4 A partial enlarged schematic diagram of point A in the middle;

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the diaphragm;

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the rocker arm seat.

[0026] In the figure, 100, rocker cover; 101, limiting groove; 102, sliding protrusion; 103, concave arc portion; 200, first push rod; 201, second push rod; 202, rocker; 203, slide groove; 204, transmission part; 300, housing; 301, mounting cavity; 302, rocker seat; 303, mounting ring groove; 304, inlet; 305, first outlet; 306, second outlet; 307, concave surface; 308, first elastic member; 309, second elastic member; 310, moving iron core; 400, diaphragm; 401, folded protrusion; 402, abutting deformation portion; 403, protruding deformation portion; 404, diaphragm accommodating cavity. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] like Figure 1-Figure 7 As shown, a rocker arm mechanism includes:

[0030] Rocker cover 100;

[0031] The transmission member includes a first push rod 200 and a second push rod 201 disposed in the rocker cover 100, and the first push rod 200 and the second push rod 201 can only move along a straight line;

[0032] The rocker 202 is rotatably connected to the rocker arm cover 100, and the two ends of the rocker 202 are respectively connected to the first push rod 200 and the second push rod 201. A slide groove 203 is provided on one of the first push rod 200, the second push rod 201 and the rocker 202 in the transmission member, and the slide groove 203 is perpendicular to the moving direction of the first push rod 200. The other one is provided with a transmission part 204 that slides with the slide groove 203.

[0033] In this embodiment, a sliding groove 203 is provided on one of the first push rod 200, the second push rod 201, and the rocker 202 in the transmission member, and a transmission portion 204 is provided on the other member to slideably engage with the sliding groove 203. This creates a sliding connection between the rocker 202 and the first and second push rods 200, 201, rather than a hinged connection as in conventional structures. This allows the first and second push rods 200, 201 to move only in a linear direction during the swinging of the rocker 202, without lateral displacement. This effectively avoids lateral rocking of the push rods caused by hinged connections and improves the stability and precision of the push rod movement.

[0034] Furthermore, first push rod 200 and second push rod 201 are each provided with a slide groove 203, and transmission parts 204 are fixedly provided at both ends of rocker 202. Because transmission parts 204 are fixed to both ends of rocker 202, when rocker 202 swings, the force is directly transmitted to the slide groove 203 on the push rod through transmission parts 204, which helps to evenly distribute the load applied to the push rod and reduce local stress concentration.

[0035] It is further defined that the transmission part 204 extends into the slide groove 203 , and when the rocker 202 rotates, the transmission part 204 can also move along the extension direction of the slide groove 203 ; there is a gap between the rocker 202 and the groove wall of the slide groove 203 .

[0036] In this embodiment, a slide groove 203 is provided on the first push rod 200 and the second push rod 201, and the transmission parts 204 at both ends of the rocker 202 extend into the slide groove 203. When the rocker 202 rotates, the transmission part 204 can also move along the extension direction of the slide groove 203. There is a gap between the rocker 202 and the groove wall of the slide groove 203 to reduce direct contact and friction between the two, so that only the transmission part 204 is in contact with the slide groove 203, thereby reducing the wear rate between components and extending the service life.

[0037] It is further defined that the transmission part 204 includes transmission balls fixedly arranged at both ends of the rocker 202, the transmission balls extend into the slide groove 203, and are in contact with the groove wall of the slide groove 203 and can move relative to the slide groove 203.

[0038] In this embodiment, the transmission member 204 is designed as a transmission ball fixedly mounted at each end of the rocker 202. The use of a spherical transmission member 204 significantly reduces friction during movement. The smaller contact area between the ball and the wall of the chute 203 significantly reduces the coefficient of friction compared to planar contact or other shapes, thereby reducing energy loss and wear. Furthermore, compared to other transmission member 204 designs (such as sliders), this transmission member 204 provides smoother motion, eliminates vibration or shock that could affect system performance, and ensures precise linear motion of the ejector rod.

[0039] Specifically, two limiting grooves 101 extending in a straight direction are provided on the rocker arm cover 100, and the first push rod 200 and the second push rod 201 are respectively arranged in the corresponding limiting grooves 101, and the first push rod 200 and the second push rod 201 can slide relative to the limiting groove 101. An opening is provided on the side of the limiting groove 101, and the rocker 202 extends into the slide groove 203 through the opening.

[0040] In this embodiment, the limit groove 101 provides a clear linear motion path for the push rod, ensuring that the push rod can only move in a straight line direction without lateral deviation, thereby improving the accuracy and stability of the push rod movement; and by limiting the push rod to slide only along the limit groove 101, unnecessary movement caused by external vibration or impact is reduced, thereby enhancing the stability of the entire mechanism.

[0041] It is worth mentioning that a plurality of sliding protrusions 102 are arranged at intervals on the inner groove wall of the limiting groove 101 to abut against the push rod, thereby dispersing the friction between the push rod and the limiting groove 101, reducing the friction loss between the two, and extending the service life of the component.

[0042] A solenoid valve comprises the rocker arm mechanism mentioned above.

[0043] It is further defined that it also includes a shell 300, an installation cavity 301 is provided in the shell 300, the rocker mechanism is fixedly provided in the installation cavity 301, a diaphragm 400 is provided in the shell 300 and is fixedly connected to the first push rod 200 and the second push rod 201, and an inwardly concave arc portion 103 is provided on the rocker cover 100 around the moving axis of the first push rod 200 and the second push rod 201. The inwardly concave arc portion 103 can be offset against the diaphragm 400 to limit the moving stroke of the diaphragm 400.

[0044] In this embodiment, when the diaphragm 400 is pulled up, its surface will fit tightly with the bowl-shaped inner surface of the concave arc portion 103. Due to the design of the bowl-shaped structure, the surface of the diaphragm 400 is in full contact with the bowl-shaped inner surface, ensuring as much as possible that the force applied to the diaphragm 400 during movement is evenly distributed, thereby reducing the risk of fatigue failure of the diaphragm 400 due to excessive local force, so that the diaphragm 400 will not age or be damaged prematurely due to repeated exposure to uneven stress.

[0045] Further preferably, a folded protrusion 401 is provided on the diaphragm 400 around the moving axis of the first push rod 200 and the second push rod 201 .

[0046] In this embodiment, part of the diaphragm 400 is bent upward to form an annular folded protrusion 401. The folded protrusion 401 provides a larger elastic deformation space, making the diaphragm 400 less likely to crack or break during repeated stretching and compression, thereby significantly extending its fatigue life. The arched protrusion structure has a certain buffering capacity and can absorb the mechanical shock and vibration generated during the opening and closing process.

[0047] Further preferably, along the peripheral edge of the diaphragm 400, an abutment deformation portion 402 is provided on one side of the diaphragm 400, and two convex deformation portions 403 with a gap in the middle are provided on the other side of the diaphragm 400. A rocker seat 302 is also provided in the shell 300, and a diaphragm accommodating cavity 404 is formed when the rocker seat 302 is fixed to the rocker cover 100. The diaphragm 400 is located in the diaphragm accommodating cavity 404, and when the rocker seat 302 is connected to the rocker cover 100, the abutment deformation portion 402 is provided in the mounting ring groove 303 on the rocker seat 302, and the rocker cover 100 is in contact with the convex deformation portion 403, thereby squeezing the abutment deformation portion 402 and the convex deformation portion 403.

[0048] In this embodiment, a mounting ring groove 303 is provided on the rocker arm seat 302, and the abutting deformation portion 402 extends into the mounting ring groove 303, thereby achieving the installation positioning between the diaphragm 400 and the rocker arm seat 302 while ensuring the sealing effect of the diaphragm 400 and the rocker arm seat 302. The mounting end surface of the rocker arm cover 100 is a plane. When the rocker arm cover 100 and the rocker arm seat 302 are assembled, the rocker arm cover 100 squeezes the abutting deformation portion 402 to help stabilize the position of the diaphragm 400 while providing the necessary sealing effect. Moreover, the different deformation portion designs on both sides of the diaphragm 400 can disperse the force points while ensuring the function, reduce the risk of damage caused by local stress concentration, and thus extend the service life.

[0049] Further preferably, the rocker arm seat 302 is provided with an inlet 304 communicating with the diaphragm accommodating cavity 404 , and the surface of the rocker arm seat 302 is an inner concave surface 307 , and the inlet 304 is located at the center of the inner concave surface 307 .

[0050] In this embodiment, if Figure 4 As shown, the rocker arm seat 302 is also provided with a first outlet 305 and a second outlet 306 which are connected to the diaphragm accommodating cavity 404. The inlet 304 is located between the first outlet 305 and the second outlet 306, and the position of the inlet 304 is lower than the positions of the first outlet 305 and the second outlet 306. The main purpose of adopting the inner concave surface 307 design is to prevent the medium from remaining in the diaphragm accommodating cavity 404; the inner concave surface 307 can help guide the fluid to flow to the outlet, enhance the self-emptying ability of the component, and remove as much internal medium as possible after each operation. It is particularly suitable for application scenarios that require high cleanliness, such as medical equipment or food processing industries.

[0051] In particular, a boss is provided at one end of the first outlet 305 and the second outlet 306 extending into the diaphragm accommodating cavity 404 to elevate the end positions of the first outlet 305 and the second outlet 306 .

[0052] It is further defined that a first elastic member 308 is provided in the installation cavity 301, and the two ends of the first elastic member 308 are respectively against the first push rod 200 and the inner cavity wall of the installation cavity 301. A moving iron core 310 capable of linear movement is also provided in the shell 300, and a second elastic member 309 is provided between the moving iron core 310 and the shell 300, and the moving iron core 310 is against the second push rod 201.

[0053] When the electromagnetic component is energized, the coil generates a magnetic force that can attract the moving iron core 310. Under the action of the magnetic force, the moving iron core 310 overcomes the elastic force of the second elastic member 309 and moves upward. Under the action of the elastic potential energy of the first elastic member 308, the first push rod 200 moves downward to achieve a sealed closure of the first outlet 305. At the same time, the second push rod 201 moves upward to keep the second outlet 306 unobstructed. In the power-off state, the electromagnetic component is powered off, the magnetic force disappears, and under the action of the elastic potential energy of the second elastic member 309, the moving iron core 310 moves downward, and the elastic force of the second elastic member 309 is greater than the elastic force of the first elastic member 308, so that the moving iron core 310 pushes the second push rod 201 downward to achieve a sealed closure of the second outlet 306. At the same time, the first push rod 200 moves upward to open the first outlet 305.

[0054] It should be noted that, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly defined. The terms "connected", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0055] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0056] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A rocker arm mechanism, characterized in that: include: rocker cover; a transmission member comprising a first push rod and a second push rod disposed in the rocker cover, wherein the first push rod and the second push rod can only move in a straight line direction; A rocker, the rocker is rotatably connected to the rocker arm cover, and the two ends of the rocker are respectively connected to the first push rod and the second push rod, and a slide groove is provided on one of the first push rod, the second push rod and the rocker in the transmission member, and the slide groove is perpendicular to the moving direction of the first push rod, and a transmission part is provided on the other to slide with the slide groove.

2. The rocker arm mechanism according to claim 1, characterized in that: The first push rod and the second push rod are both provided with a sliding groove, and transmission parts are fixedly provided at both ends of the rocker.

3. The rocker arm mechanism according to claim 2, characterized in that: The transmission part extends into the chute, and when the rocker rotates, the transmission part can also move along the extension direction of the chute; there is a gap between the rocker and the chute wall.

4. A rocker arm mechanism according to claim 2 or 3, characterized in that: The transmission part includes transmission balls fixedly arranged at both ends of the rocker. The transmission balls extend into the chute and are connected to the chute wall of the chute and can move relative to the chute.

5. The rocker arm mechanism according to claim 1, characterized in that: The rocker arm cover is provided with two limiting grooves extending in a straight direction, the first push rod and the second push rod are respectively arranged in the corresponding limiting grooves, and the first push rod and the second push rod can slide relative to the limiting grooves. An opening is provided on the side of the limiting groove, and the rocker arm extends into the sliding groove through the opening.

6. A solenoid valve, characterized in that: Comprising the rocker arm mechanism according to any one of claims 1 to 5.

7. The solenoid valve according to claim 6, characterized in that: It also includes a shell, which has an installation cavity, and the rocker mechanism is fixedly arranged in the installation cavity. A diaphragm is provided in the shell and is fixedly connected to the first push rod and the second push rod. An inwardly concave arc portion is provided on the rocker cover around the moving axis of the first push rod and the second push rod. The inwardly concave arc portion can be against the diaphragm to limit the moving stroke of the diaphragm.

8. The solenoid valve according to claim 7, characterized in that: A folded protrusion is provided on the diaphragm around the moving axes of the first push rod and the second push rod.

9. The solenoid valve according to claim 7, characterized in that: Along the peripheral edge of the diaphragm, an abutment deformation portion is provided on one side of the diaphragm, and two convex deformation portions with a gap in the middle are provided on the other side of the diaphragm. A rocker seat is also provided in the shell, and a diaphragm mounting cavity is formed when the rocker seat and the rocker cover are fixed. The diaphragm is located in the diaphragm mounting cavity, and when the rocker seat is connected to the rocker cover, the abutment deformation portion is provided in the mounting ring groove on the rocker seat, and the rocker cover is in contact with the convex deformation portion, thereby squeezing the abutment deformation portion and the convex deformation portion.

10. The solenoid valve according to claim 7, characterized in that: The rocker arm seat is provided with an inlet communicated with the diaphragm mounting cavity, and the surface of the rocker arm seat is an inner concave surface, and the inlet is located at the center of the inner concave surface.

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