Integrated machine core for lifting column

Abstract

The integrated machine core for the lifting column comprises a valve body, the lifting column, a shell and an oil pump assembly located in the shell, the shell and the lifting column are jointly arranged above the valve body, the lower half section of the lifting column is arranged in the shell, the bottom of the oil pump assembly is connected with a supporting rod and a communicating pipe, and the supporting rod is connected with the communicating pipe. The oil pump assembly is arranged on the valve body through a supporting rod, an oil way is arranged in the valve body, the oil pump assembly is communicated with the oil way in the valve body through a communicating pipe, a piston and a piston rod are arranged in the lifting column, and the oil way in the valve body is communicated with the bottom of the lifting column. According to the scheme, the lower portion of the hydraulic column is arranged in the shell, a more compact structure can be achieved, the occupied space of the whole lifting column system is reduced, meanwhile, the protection performance of hydraulic elements is improved, and the influence of the external environment on the hydraulic system is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical device production, and specifically relates to an integrated movement for a lifting column. Background Art

[0002] The hydraulic lifting column is an automatic lifting bollard that uses a hydraulic motor as a power source. It can be divided into a hydraulic integrated lifting column and a hydraulic split lifting column. They all use a hydraulic motor as a power unit. The core of the hydraulic lifting column is the hydraulic lifting column movement. In the prior art, the hydraulic lifting column movement consists of an oil pump assembly, a housing, and a hydraulic cylinder.

[0003] A Chinese patent application with application number 2022217244520 discloses a movement for a lifting column, comprising a valve block, wherein an oil circuit structure is provided inside the valve block; a housing, wherein the housing is arranged on the valve block through a connecting structure; an oil pump assembly, wherein the oil pump assembly is mounted on the valve block in the housing through a support rod; and an upper cover, wherein the upper cover is arranged on the top of the housing; wherein the movement also comprises a hydraulic cylinder arranged on the valve block on one side of the housing and an oil pipe having one end connected to the top of the hydraulic cylinder and the other end connected to the valve block.

[0004] The advantage of the above solution is that the oil pump assembly and the hydraulic cylinder are arranged on the valve block, which makes the structure compact and convenient for construction and installation. However, since the lifting column is often buried deep underground, dust or moisture is easy to enter the lifting column movement, especially the top and bottom of the hydraulic cylinder, causing pollution to the hydraulic cylinder. Utility Model Content

[0005] In order to solve the above problems, the utility model provides an integrated movement for a lifting column, comprising a valve body, a hydraulic cylinder, a shell and an oil pump assembly located in the shell, the shell and the hydraulic cylinder are jointly arranged above the valve body, the lower half of the hydraulic cylinder is arranged in the shell, the bottom of the oil pump assembly is connected with a support rod and a connecting pipe, the oil pump assembly is arranged on the valve body through the support rod, an oil circuit is arranged inside the valve body, the oil pump assembly is connected with the oil circuit in the valve body through the connecting pipe, a piston and a piston rod are arranged inside the hydraulic cylinder, and the oil circuit in the valve body is connected with the bottom of the hydraulic cylinder.

[0006] Preferably, a protective cover is threadedly connected to the top of the hydraulic cylinder, an axial hole matching the piston rod is provided in the middle of the protective cap, and a dustproof groove, a first sealing groove and a second sealing groove are provided on the side walls of the axial hole from top to bottom, a dustproof groove is installed with a dustproof ring, and sealing rings are installed in both the first sealing groove and the second sealing groove.

[0007] Preferably, the sealing ring installed in the first sealing groove is a combination structure of a rubber O-ring and a polytetrafluoroethylene ring, and the sealing ring installed in the second sealing groove is a polyurethane Y-ring.

[0008] Preferably, the top of the piston rod is provided with an external thread, and the top of the piston rod is threadedly connected to a limiting nut.

[0009] Preferably, a piston groove is provided on the outer side of the piston, a piston ring is provided in the piston groove, and the corners of the piston groove are of arc structure.

[0010] The advantages of the utility model are:

[0011] 1. In this solution, the lower part of the hydraulic cylinder is integrated into the shell, which can achieve a more compact structure and reduce the space occupied by the entire lifting column system; at the same time, the protection of the shell can prevent dust, moisture and other pollutants in the environment from invading the interior through the gap under the hydraulic cylinder, and can prevent the surface of the lower half of the hydraulic cylinder from being corroded, thus achieving a protective effect.

[0012] 2. The top of the hydraulic cylinder in this solution is protected by a detachable protective cover, and a dust ring and a sealing ring are provided in the protective cover. The sealing rings of the hydraulic cylinder are all integrated in the protective cover. In this way, when processing the sealing groove, only one component of the protective cover needs to be processed, which can effectively ensure the coaxiality. Moreover, since the protective cover is easy to disassemble, the subsequent maintenance work will be more convenient.

[0013] 3. In this solution, the piston and the piston rod are connected by threads, which facilitates the subsequent disassembly and maintenance of the piston and the piston rod.

[0014] 4. The corners of the plug groove in this solution are of arc structure, which can increase the contact area between the piston ring and the inner wall of the hydraulic cylinder, reduce the stress concentration of the piston ring, help improve the durability and performance of the piston ring, and reduce the vibration and noise caused by stress concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural diagram of the utility model.

[0016] Figure 2 It is a cross-sectional view of the utility model.

[0017] Figure 3 For this utility model Figure 2 A is an enlarged view.

[0018] Figure 4 This is a partial structural diagram of the piston ring of the utility model.

[0019] In the figure: 1 valve body, 2 hydraulic cylinder, 3 housing, 4 oil pump assembly, 5 support rod, 6 connecting pipe, 7 piston, 8 piston rod, 9 protection cover, 10 dustproof groove, 11 first sealing groove, 12 second sealing groove, 13 dustproof ring, 14 external thread, 15 limit nut, 16 piston groove, 17 piston ring, 18 arc structure. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0022] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. At the same time, when an element is referred to as "fixed on" or "provided on" another element, it can be directly on the other element or there may be a central element at the same time. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be a central element at the same time. When an element is referred to as being "fixedly connected to" another element, it can be a common fixed connection method such as welding, bolting, or gluing. In short, for ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Example 1

[0023] like Figure 1-2As shown, an integrated movement for a lifting column includes a valve body 1, a hydraulic cylinder 2, a housing 3, and an oil pump assembly 4 located in the housing 3. The housing 3 and the hydraulic cylinder 2 are arranged above the valve body 1, and the lower half of the hydraulic cylinder 2 is arranged in the housing 3. The bottom of the oil pump assembly 4 is connected with a support rod 5 and a connecting pipe 6. The oil pump assembly 4 is arranged on the valve body 1 through the support rod 5. An oil circuit is arranged inside the valve body 1. The oil pump assembly 4 is connected with the oil circuit in the valve body 1 through the connecting pipe 6. A piston 7 and a piston rod 8 are arranged inside the hydraulic cylinder 2. The oil circuit in the valve body 1 is connected with the bottom of the hydraulic cylinder 2. The oil pump assembly 4 injects the hydraulic cylinder 2 into the hydraulic cylinder 2 through the oil circuit in the valve body 1, drives the piston 7 to drive the piston rod 8 to rise, and the hydraulic oil reflux in the hydraulic cylinder 2 will cause the piston 7 and the piston rod 8 to descend. The valve body 1 is provided with a corresponding oil circuit and a solenoid valve to control the flow of the hydraulic oil. Its specific structure and principle are well known in the art, and are also described in detail in the patent documents mentioned in the background technology, which will not be repeated in this embodiment.

[0024] In this embodiment, the lower half of the hydraulic cylinder 2 is integrated into the housing 3, which can achieve a more compact structure and reduce the space occupied by the entire lifting column system; at the same time, the protection of the housing 3 can prevent dust, moisture and other pollutants in the environment from invading the interior through the gap below the hydraulic cylinder 2, and can prevent the surface of the lower half of the hydraulic cylinder 2 from being corroded, thus achieving a protective effect. The presence of the housing 3 can also increase the mechanical stability of the entire lifting column system and reduce vibration and deformation.

[0025] Combination Figure 3 The top of the hydraulic cylinder 2 is threadedly connected with a protective cover 9, and an axial hole matching the piston rod 8 is provided in the middle of the protective cap. The protective cover 9 is connected to the top of the hydraulic cylinder 2 by threaded connection. The piston rod 8 is lifted and lowered in the circumferential axis hole. The side walls of the axis hole are provided with a dustproof groove 10, a first sealing groove 11 and a second sealing groove 12 from top to bottom. A dustproof ring 13 is installed in the dustproof groove 10. The dustproof ring 13 is close to the top of the end axis hole and has the function of removing dust, sand, rainwater, frost and other dirt attached to the reciprocating piston rod 8 exposed on the external surface of the hydraulic cylinder 2, and preventing external dust and rainwater from entering the interior of the sealing mechanism.

[0026] The first sealing groove 11 and the second sealing groove 12 are both equipped with sealing rings. The sealing ring installed in the first sealing groove 11 is a combination structure of a rubber O-ring and a polytetrafluoroethylene ring, and the sealing ring installed in the second sealing groove 12 is a polyurethane Y-ring. The rubber O-ring is a force-applying element, which provides sufficient sealing force and compensates for the polytetrafluoroethylene ring. With the polyurethane Y-ring, the seal as a whole can also have a good sealing effect under low friction resistance. The combination structure of the polyurethane Y-ring, the rubber O-ring and the polytetrafluoroethylene ring can achieve a completely sealed state, and the price is cheap.

[0027] In this embodiment, the top of the hydraulic cylinder 2 is protected by a detachable protective cover 9, and a dust ring 13 and a sealing ring are provided in the protective cover 9. The sealing rings of the hydraulic cylinder 2 are all integrated in the protective cover 9, so that when processing the sealing groove, only one component of the protective cover 9 needs to be processed, which can effectively ensure the coaxiality, and because the protective cover 9 is easy to disassemble, the subsequent maintenance work will be more convenient. Once a sealing ring is damaged, it can be replaced or repaired in time.

[0028] Combination Figure 4 In this embodiment, the piston 7 and the piston rod 8 are threadedly connected, which is convenient for disassembly. When the piston 7 or the piston rod 8 is damaged, a new part can be replaced to avoid overall scrapping and increase maintenance costs. The top of the piston rod 8 is provided with an external thread 14, and the top of the piston rod 8 is threadedly connected with a limit nut 15. The limit nut 15 is usually equipped with a pad to provide a certain limit effect when the piston rod 8 descends. By rotating the nut, the effective length of the threaded connection can be changed, thereby adjusting the relative position of the piston rod 8.

[0029] The outer side of the piston 7 is provided with a piston groove 16, in which a piston ring 17 is provided, and the corners of the piston groove 16 are arc structures 18. The arc structure 18 can increase the contact area between the piston ring 17 and the inner wall of the hydraulic cylinder 2, so that the stress concentration of the piston ring 17 is reduced, which helps to improve the durability and performance of the piston ring 17, and at the same time can reduce the vibration and noise caused by stress concentration. Reducing stress concentration can reduce the risk of failure caused by fatigue and improve the reliability of the piston ring 17.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated movement for a lifting column, characterized in that: The invention comprises a valve body (1), a hydraulic cylinder (2), a shell (3), and an oil pump assembly (4) located in the shell (3); the shell (3) and the hydraulic cylinder (2) are arranged together above the valve body (1); the lower half of the hydraulic cylinder (2) is arranged in the shell (3); the bottom of the oil pump assembly (4) is connected to a support rod (5) and a connecting pipe (6); the oil pump assembly (4) is arranged on the valve body (1) through the support rod (5); an oil circuit is arranged inside the valve body (1); the oil pump assembly (4) is connected to the oil circuit in the valve body (1) through the connecting pipe (6); a piston (7) and a piston rod (8) are arranged inside the hydraulic cylinder (2); and the oil circuit in the valve body (1) is connected to the bottom of the hydraulic cylinder (2).

2. The integrated movement for a lifting column according to claim 1, characterized in that: The top of the hydraulic cylinder (2) is threadedly connected to a protective cover (9), the middle of the protective cover (9) is provided with an axial hole matching the piston rod (8), the side wall of the axial hole is provided with a dustproof groove (10), a first sealing groove (11) and a second sealing groove (12) from top to bottom, a dustproof ring (13) is installed in the dustproof groove (10), and sealing rings are installed in both the first sealing groove (11) and the second sealing groove (12).

3. The integrated movement for the lifting column according to claim 2, characterized in that: The sealing ring installed in the first sealing groove (11) is a combined structure of a rubber O-ring and a polytetrafluoroethylene ring, and the sealing ring installed in the second sealing groove (12) is a polyurethane Y-ring.

4. The integrated movement for the lifting column according to claim 3, characterized in that: The top of the piston rod (8) is provided with an external thread (14), and the top of the piston rod (8) is threadedly connected to a limit nut (15).

5. The integrated movement for the lifting column according to claim 4, characterized in that: The piston (7) and the piston rod (8) are threadedly connected.

6. The integrated movement for a lifting column according to claim 5, characterized in that: A piston groove (16) is provided on the outer side of the piston (7), a piston ring (17) is provided in the piston groove (16), and the corners of the piston groove (16) are arc structures (18).

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