Limiting mechanism for valve ball of one-way valve in oil inlet channel of working cavity of jack oil cylinder

Abstract

The utility model provides a limiting mechanism for a valve ball of a one-way valve in an oil inlet channel of a working cavity of a jack oil cylinder, which is arranged in the working cavity of the oil cylinder of a jack base and comprises a disc-shaped pressing sheet, and the pressing sheet is fixed in the working cavity of the oil cylinder through a fixing piece; the pressing piece can cover a part of an oil inlet of the oil cylinder working cavity so as to prevent a valve ball of a one-way valve in an oil inlet channel of the oil cylinder working cavity from falling out of the oil inlet. Compared with a traditional rubber material, the pressing sheet is made of metal materials, so that the pressing sheet is higher in strength and not prone to being broken by collision of the valve ball. Besides, the pressing piece is in a round piece shape, the center position of the pressing piece is fixed by the fixing piece, even if the jack is used for a long time and the pressing piece deflects due to looseness of the fixing piece, the pressing piece can still shield the oil inlet, the valve ball is effectively prevented from falling out of the oil inlet, and the service life of the jack is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of jacks, and specifically refers to a limiting mechanism for a valve ball of a one-way valve in an oil inlet passage of a working chamber of a jack cylinder. Background Technique

[0002] The structure of a hydraulic jack generally includes components such as a base 1, a cylinder, and an oil pump. The cylinder and the oil pump are arranged on the base; an oil cylinder working chamber is provided on the base, and the oil cylinder working chamber is communicated with the oil pump through an oil inlet passage and an oil return passage, and one-way valves are arranged in both the oil inlet passage and the oil return passage. When using the hydraulic jack, by pressing down the pump core of the oil pump with a handle, the hydraulic oil in the pump chamber of the oil pump is pressed into the oil inlet passage of the oil cylinder working chamber 2. When the hydraulic oil flows along the oil inlet passage of the oil cylinder working chamber 2, it will lift the valve ball 5 of the one-way valve in the oil inlet passage, and then enter the oil cylinder working chamber 2 through the oil inlet 3 of the oil cylinder working chamber 2; when the handle is lifted to raise the pump core, the valve ball 5 of the one-way valve in the oil inlet passage falls back to block the oil inlet passage, and the hydraulic oil in the oil cylinder working chamber 2 cannot flow back from the oil inlet passage to the pump chamber. By repeatedly lifting and pressing down the pump core, the hydraulic oil flowing into the oil cylinder working chamber 2 gradually increases, thereby pushing the piston rod of the oil cylinder upward so that the piston rod can jack up a heavy object upward. After use, after pressure relief, the hydraulic oil enters the oil return passage of the oil cylinder working chamber 2 from the oil return port 7, and after pushing open the valve ball of the one-way valve in the oil return passage, it flows back to the pump chamber, and the piston rod descends.

[0003] In order to prevent the valve ball 5 from being ejected from the one-way valve valve chamber when the hydraulic oil enters the oil cylinder working chamber 2 from the oil inlet passage, resulting in the failure of the one-way valve in the oil inlet passage, a pressure rubber plate 6 is installed in the oil cylinder working chamber 2 in the existing jack. The pressure rubber plate 6 blocks a part of the oil inlet 3. By blocking the valve ball 5 with the pressure rubber plate 6, it can prevent the valve ball 5 from being flushed out of the one-way valve valve chamber when the hydraulic oil enters the oil cylinder working chamber 2, as Figure 1 shown.

[0004] However, the pressure rubber plate 6 in the prior art is a strip-shaped rubber plate, which is fixed in the oil cylinder working chamber 2 by a pin. Since the valve ball 5 is repeatedly lifted by the hydraulic oil, the valve ball 5 repeatedly collides with the pressure rubber plate 6. After long-term use, the pressure rubber plate 6 is easily broken by the valve ball 5, or the pressure rubber plate 6 is collided and loosened, resulting in the deflection of the pressure rubber plate 6 and misalignment with the oil inlet 3, as Figure 2 shown. In both of the above two situations, the pressure rubber plate 6 cannot continue to block the oil inlet 3, and the valve ball 5 is flushed out of the oil inlet 3 by the hydraulic oil and enters the oil cylinder working chamber 2, resulting in the failure of the one-way valve in the oil inlet passage, and the jack cannot be used normally. Therefore, the present application provides a limiting mechanism for a valve ball of a one-way valve in an oil inlet passage of a working chamber of a jack cylinder, which can well solve the above problems and extend the service life of the jack. Content of the Utility Model

[0005] In order to solve the problems existing in the existing image stabilization technology, the utility model designs a limiting mechanism for the valve ball of the one-way valve in the oil inlet passage of the working chamber of the jack oil cylinder, which can well limit the valve ball, prevent the valve ball from separating from the valve chamber of the one-way valve, and extend the service life of the jack.

[0006] The utility model is realized through the following technical solutions: A limiting mechanism for the valve ball of the one-way valve in the oil inlet passage of the working chamber of the jack oil cylinder is arranged in the working chamber of the oil cylinder of the jack base, and it includes a pressing piece in the shape of a circular sheet, and the pressing piece is fixed in the working chamber of the oil cylinder through a fixing piece; the pressing piece can cover a part of the oil inlet of the working chamber of the oil cylinder to prevent the valve ball of the one-way valve in the oil inlet passage of the working chamber of the oil cylinder from falling out from the oil inlet.

[0007] As a preferred solution, the pressing piece is a metal sheet.

[0008] As a preferred solution, the fixing piece passes through the center of the pressing piece and then fixes the pressing piece in the working chamber of the oil cylinder.

[0009] As a preferred solution, the fixing piece is a screw.

[0010] As a preferred solution, the pressing piece covers 1 / 5 - 3 / 5 of the area of the oil inlet.

[0011] As a preferred solution, the thickness of the pressing piece is 0.5 - 1 mm.

[0012] Compared with the prior art, the embodiments of the present application have the following beneficial effects: The pressing piece of the utility model is made of metal material. Compared with the traditional rubber material, it has higher strength and is not easily broken by the valve ball. In addition, the pressing piece of the utility model is in the shape of a circular sheet, and its central position is fixed by a fixing piece. Even after long-term use, if the fixing piece loosens and causes the pressing piece to deflect, the pressing piece can still block the oil inlet, effectively preventing the valve ball from falling out from the oil inlet and extending the service life of the jack. Description of the Drawings

[0013] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation to the present application. In each figure, the same reference numerals represent the same components. Among them,

[0014] Figure 1 It is a schematic diagram of the rubber pressing plate blocking the oil inlet in the prior art.

[0015] Figure 2 It is a schematic diagram of the rubber pressing plate deflecting and unable to block the oil inlet in the prior art.

[0016] Figure 3 It is a schematic diagram of the pressing piece of the present utility model blocking the oil inlet.

[0017] The reference numerals in the above-mentioned drawings are as follows: 1 - jack base, 2 - working chamber of the oil cylinder, 3 - oil inlet, 4 - fixing member, 5 - valve ball, 6 - rubber pressing plate, 7 - oil return port, 8 - pressing piece. Detailed implementation manners

[0018] In order to enable those skilled in the art of the present technology to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0019] It should be noted that if the terms "first", "second", etc. are involved in the description, claims and the above-mentioned drawings of the present application, they are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances for the embodiments of the present application described herein. In addition, if the terms "include" and "have" and any variations thereof are involved, the intention is to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0020] In the present application, if terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. are involved, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation or be constructed and operated in a specific orientation.

[0021] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above-mentioned terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific circumstances.

[0022] In addition, in this application, if terms such as "installation", "setting", "provided with", "connection", "connected", "socketed" are involved, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, components or parts. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will describe this application in detail with reference to the drawings and in conjunction with the embodiments.

[0024] Embodiment

[0025] This embodiment discloses a limiting mechanism for the valve ball of a check valve in the oil inlet passage of a jack oil cylinder working chamber, which is arranged in the oil cylinder working chamber 2 of the jack base 1 and is used to prevent the valve ball 5 of the check valve in the oil inlet passage of the oil cylinder working chamber 2 from falling out of the oil inlet 3 of the oil cylinder working chamber 2.

[0026] As Figure 1 shown, the limiting mechanism for the valve ball of the check valve in the oil inlet passage of the jack oil cylinder working chamber includes a pressing piece 8 and a fixing member 4; the pressing piece 8 is fixed in the oil cylinder working chamber 2 through the fixing member 4, and the position of the pressing piece 8 is close to the oil inlet 3 in the oil cylinder working chamber 2, so that the pressing piece 8 can cover a part of the oil inlet 3 of the oil cylinder working chamber 2. In this way, when using the jack, when the hydraulic oil in the oil pump flows through the check valve in the oil inlet passage and lifts the valve ball 5 of the check valve, the pressing piece 8 can block the valve ball 5 to prevent the valve ball 5 from falling out of the oil inlet 3 and disengaging from the valve chamber of the check valve.

[0027] In addition, as Figure 1 shown, the pressing piece 8 is in a circular sheet shape, and the fixing member 4 passes through the center of the pressing piece 8 and then fixes the pressing piece 8 in the oil cylinder working chamber 2; that is, the center of the pressing piece 8 is fixed in the oil cylinder working chamber 2 through the fixing member 4. In this way, when the pressing piece 8 rotates, the distance between its circumferential edge and the oil inlet 3 is the same. After the jack is used for a long time, even if the fixing member 4 becomes loose and causes the pressing piece 8 to deflect, the pressing piece 8 can still cover a part of the oil inlet 3, thereby preventing the valve ball 5 from falling out of the oil inlet.

[0028] The fixing member 4 can be a pin or a screw. When the fixing member 4 is a pin, a pin hole can be provided in the oil cylinder working chamber 2, and the pin is clamped into the pin hole to fix the pressing piece 8; when the fixing member 4 is a screw, a screw hole can be provided in the oil cylinder working chamber 2, and the screw is screwed into the screw hole to fix the pressing piece 8. In specific implementation, the fixing member 4 uses a screw, and its fixing effect is better.

[0029] During specific implementation, the pressing piece 8 covers 1 / 5 - 3 / 5 of the area of the oil inlet 3. For example, 1 / 5, 2 / 5, or 3 / 5 is acceptable. It only needs to ensure that the pressing piece 8 can block the valve ball 5 without affecting the normal entry of hydraulic oil from the oil inlet 3 into the working chamber 2 of the oil cylinder.

[0030] In addition, when designing the thickness of the pressing piece 8, it is necessary to ensure the strength of the pressing piece 8 while not affecting the normal installation of the piston rod of the oil cylinder in the working chamber 2 of the oil cylinder. Therefore, in this embodiment, the thickness of the pressing piece 8 is set to 0.5 - 1 mm. For example, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1.0 mm is acceptable.

[0031] The pressing piece 8 is made of a metal material, such as an iron, copper, or stainless steel sheet. Compared with traditional rubber sheets, it has higher strength, is not easily broken due to the impact of the valve ball 5, and can improve the service life.

[0032] It should be noted that all the features disclosed in this specification, or all the steps in the disclosed methods or processes, except for mutually exclusive features and / or steps, can be combined in any way.

[0033] In addition, the above specific embodiments are exemplary. Those skilled in the art can come up with various solutions inspired by the disclosed content of the present invention, and these solutions also fall within the scope of the disclosure of the present invention and within the protection scope of the present invention. Those skilled in the art should understand that the description of the present invention and its accompanying drawings are illustrative and do not constitute a limitation on the claims. The protection scope of the present invention is defined by the claims and their equivalents.

Claims

1. A limiting mechanism for the valve ball of a one-way valve in the oil inlet passage of the working chamber of a jack cylinder, which is arranged in the working chamber (2) of the cylinder of the jack base (1), and is characterized in that, It includes a tablet (8) in the shape of a circular sheet, and the tablet (8) is fixed in the working chamber (2) of the oil cylinder through a fixing member (4); the tablet (8) can cover a part of the oil inlet (3) of the working chamber (2) of the oil cylinder to prevent the valve ball (5) of the one-way valve in the oil inlet passage of the working chamber (2) of the oil cylinder from falling out from the oil inlet (3).

2. The limiting mechanism of the valve ball of the one-way valve in the oil inlet passage of the working chamber of the jack oil cylinder according to claim 1, characterized in that, The tablet (8) is a metal sheet.

3. The limiting mechanism of the valve ball of the one-way valve in the oil inlet passage of the working chamber of the jack oil cylinder according to claim 1, characterized in that, The fixing member (4) passes through the center of the tablet (8) and then fixes the tablet (8) in the working chamber (2) of the oil cylinder.

4. The limiting mechanism of the valve ball of the one-way valve in the oil inlet passage of the working chamber of the jack oil cylinder according to claim 1, characterized in that, The fixing member (4) is a screw.

5. The limiting mechanism of the valve ball of the one-way valve in the oil inlet passage of the working chamber of the jack oil cylinder according to claim 1, characterized in that, The tablet (8) covers 1 / 5 - 3 / 5 of the area of the oil inlet (3).

6. The limiting mechanism of the valve ball of the one-way valve in the oil inlet passage of the working chamber of the jack oil cylinder according to claim 1, characterized in that, The thickness of the tablet (8) is 0.5 - 1 mm.

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