Stroke valve of pneumatic booster oil pump

Abstract

The utility model discloses a pneumatic booster oil pump stroke valve, which relates to the technical field of mechanical valves and is used for being matched with a valve core of a mechanical valve, a limiting structure comprises a limiting part, a positioning part and a damping ring, the lower end of the limiting part is integrally connected with the positioning part, and the lower end of the positioning part is integrally connected with the damping ring. The damping rings are arranged in the positioning part and the limiting part, and the diameter of the limiting part is larger than that of the positioning part. According to the mechanical valve, through the arrangement of the limiting structure, the position of the valve element of the mechanical valve can be limited, so that the valve element of the mechanical valve can be kept at a certain position, and the situation that the position of the valve element of the mechanical valve deviates due to misoperation or the inertia effect is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical valve technical field, especially pneumatic supercharged oil pump stroke valve. BACKGROUND

[0002] The valve core is a valve part that realizes the basic functions of direction control, pressure control or flow control through its movement.

[0003] Referring to Figure 1 The mechanical valve valve core in the prior art is installed in the cylinder end cover through the valve sleeve, the mechanical valve valve core is installed in the valve sleeve, a cavity is arranged in the cylinder cover, the valve sleeve is arranged in the cavity, the lower end of the valve sleeve abuts against the lower inner wall of the cavity, the lower end of the mechanical valve valve core is connected with the upper end of the cylinder piston rod, and the mechanical valve valve core can move up and down in the valve sleeve, so that the opening or closing of the gas circuit can be realized.

[0004] However, the existing mechanical valve valve core does not have a matched limiting structure, cannot limit the mechanical valve valve core, and cannot keep the mechanical valve valve core at a specific position, so that the position of the mechanical valve valve core deviates due to misoperation or inertia in the actual application process, and gas leakage is caused, therefore, it is necessary to design a stroke valve capable of limiting the stroke of the mechanical valve valve core. UTILITY MODEL CONTENTS

[0005] The utility model discloses a pneumatic supercharged oil pump stroke valve, which is used to solve the above technical problems.

[0006] The utility model discloses the technical scheme as follows:

[0007] A pneumatic supercharged oil pump stroke valve is used for cooperating with a mechanical valve core, a limiting structure includes a limiting part, a positioning part and a damping ring, the lower end of the limiting part is integrally connected with the positioning part, the positioning part and the limiting part are internally provided with the damping ring, and the diameter of the limiting part is greater than that of the positioning part.

[0008] Preferably, a first mounting groove is formed in the inner wall of the limiting part, a second mounting groove is formed in the inner wall of the positioning part, and the damping ring is mounted in the first mounting groove and the second mounting groove.

[0009] Further preferably, the damping ring at least partially extends out of the first mounting groove or the second mounting groove.

[0010] Preferably, an annular groove is formed in the outer wall of the limiting part.

[0011] Preferably, the inner diameter of the positioning part is the same as that of the limiting part.

[0012] The technical scheme has the advantages or beneficial effects as follows:

[0013] In the utility model, the position of the mechanical valve core can be limited through the setting of the limiting structure, so that the mechanical valve core can be kept in a certain position, and deviation of the position of the mechanical valve core caused by misoperation or inertial effect is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic diagram of installation of a mechanical valve core in the prior art;

[0015] Figure 2 is a schematic diagram of installation of a pneumatic booster oil pump stroke valve in the utility model;

[0016] Figure 3 is a sectional view of the limiting structure in the utility model.

[0017] In the drawing: 1, mechanical valve core; 2, cylinder head; 3, valve sleeve; 4, limiting structure; 41, limiting part; 42, positioning part; 43, damping ring; 44, first installation groove; 45, second installation groove; 46, annular groove. DETAILED DESCRIPTION

[0018] The technical scheme of the utility model will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are some embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0019] In the description of the utility model, it should be explained that if terms such as 'center', 'upper', 'lower', 'left', 'right','vertical', 'horizontal', 'inner', 'outer' and the like appear, the indicated orientation or position relationship is based on the orientation or position relationship shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, if the terms 'first','second', 'third' appear, they are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the utility model, it is necessary to explain that, unless another explicit provision and limitation, if the term "installation", "connection", "connection" appears, it should be understood in a broad sense, for example, it can be fixed connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through the intermediate medium, can be the communication inside two elements, for the ordinary skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to the specific circumstances.

[0021] Figure 2 It is the installation diagram of the pneumatic pressure oil pump stroke valve in the utility model, and Figure 3 It is the sectional view of the limiting structure, please see Figures 2 to 3 The limiting structure 4 includes the limiting part 41, the positioning part 42 and the damping ring 43, the lower end of the limiting part 41 is integrally connected with the positioning part 42, the inside of the positioning part 42 and the limiting part 41 is provided with the damping ring 43, and the diameter of the limiting part 41 is greater than the diameter of the positioning part 42. In the embodiment, as shown in Figure 2 The inside of the cylinder head 2 is provided with a chamber, the valve sleeve 3 is arranged in the chamber, the mechanical valve spool 1 is movably arranged in the valve sleeve 3, the limiting structure 4 is arranged on the lower side of the valve sleeve 3, and the lower end of the cylinder head 2 is provided with a positioning hole, the positioning hole is communicated with the chamber, when the limiting structure 4 is installed in the chamber, the positioning part 42 is inserted into the positioning hole and is fixedly connected with the positioning hole, for example, can be welded or connected through sealing glue. The lower end of the valve sleeve 3 can abut against the upper end of the limiting part 41 or a gap is arranged between the lower end of the valve sleeve 3 and the upper end of the limiting part 41, when the lower end of the valve sleeve 3 has a gap with the upper end of the limiting part 41, the valve sleeve 3 is fixedly connected with the inside of the chamber.

[0022] The valve sleeve 3 in the embodiment is provided with an air inlet hole, an air outlet hole and a pressure relief hole, and the specific air path principle is prior art, which will not be limited here, and the structure of the mechanical valve spool 1 and the valve sleeve 3 is prior art. In the embodiment, the limiting structure 4 is added on the basis of the prior art, so that the mechanical valve spool 1 can be kept at a specific position, and the mechanical valve spool 1 can be prevented from deviating from the position due to misoperation or inertial action.

[0023] The damping ring 43 has elasticity and can extrude the outer wall of the mechanical valve spool 1, so as to apply a certain thrust to the mechanical valve spool 1, so that the mechanical valve spool 1 can pass through the damping ring 43. The damping ring 43 can extrude the outer wall of the mechanical valve spool 1, and when the thrust disappears, the mechanical valve spool 1 can be kept fixed, so that the position of the mechanical valve spool 1 is fixed, and the mechanical valve spool 1 is prevented from moving.

[0024] Furthermore, as a preferred embodiment, a first mounting groove 44 is defined on the inner wall of the limiting portion 41, and a second mounting groove 45 is defined on the inner wall of the positioning portion 42. Damping rings 43 are installed in both the first mounting groove 44 and the second mounting groove 45. The first mounting groove 44 and the second mounting groove 45 are provided for installing the damping ring 43. When the damping ring 43 is installed in the first mounting groove 44 and the second mounting groove 45, the damping ring 43 at least partially extends out of the first mounting groove 44 or the second mounting groove 45, thereby facilitating the damping ring 43 to squeeze the outer wall of the mechanical valve core 1.

[0025] Furthermore, as a preferred embodiment, an annular groove 46 is provided on the outer wall of the limiting portion 41. Figure 3 As shown, the provision of an annular groove 46 can reduce the weight of the limiting structure 4 and save manufacturing costs. Furthermore, the thickness of the upper sidewall of the annular groove 46 is smaller than the thickness of the lower sidewall of the annular groove 46. A raised ring is provided on the outer wall of the mechanical valve core 1. The raised ring can abut against the upper surface of the limiting portion 41, while the lower surface of the limiting portion 41 can abut against the lower inner wall of the chamber. When the raised ring abuts against the limiting portion 41, it indicates that the mechanical valve core 1 has moved downward to its maximum displacement.

[0026] Furthermore, as a preferred embodiment, the inner diameter of the positioning portion 42 is the same as the inner diameter of the limiting portion 41, the inner diameters of the two damping rings 43 are the same, and the inner diameter of the damping ring 43 is slightly larger than the outer diameter of the lower end of the mechanical valve core 1, so that the damping ring 43 can squeeze the mechanical valve core 1. When the lower end of the mechanical valve core 1 is inserted into the limiting portion 41, the damping ring 43 will be squeezed, causing the damping ring 43 to deform.

[0027] The above description is only a preferred embodiment of the present invention and does not limit the implementation method and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. The pneumatic booster oil pump stroke valve is used to cooperate with the mechanical valve core, and its characteristics are: The limiting structure includes a limiting part, a positioning part and a damping ring. The lower end of the limiting part is integrally connected with the positioning part. The damping ring is provided inside the positioning part and the limiting part. The diameter of the limiting part is larger than the diameter of the positioning part.

2. The pneumatic booster oil pump stroke valve according to claim 1, characterized in that: A first mounting groove is formed on the inner wall of the limiting portion, and a second mounting groove is formed on the inner wall of the positioning portion. The damping ring is installed in both the first mounting groove and the second mounting groove.

3. The pneumatic booster oil pump stroke valve according to claim 2, characterized in that: The damping ring at least partially extends out of the first mounting slot or the second mounting slot.

4. The pneumatic booster oil pump stroke valve according to claim 1, characterized in that: An annular groove is provided on the outer wall of the limiting portion.

5. The pneumatic booster oil pump stroke valve according to claim 1, characterized in that: The inner diameter of the positioning portion is the same as the inner diameter of the limiting portion.

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