Oil seepage prevention structure of rotary oil cylinder

Abstract

The utility model provides a rotary oil cylinder oil seepage prevention structure which comprises a cylinder body, a rod-shaped piston is arranged in the cylinder body, and sealing rings are arranged at the two ends of the piston. A protective shell is arranged on the side face of the cylinder body. A connecting piece extending into the protective shell is arranged in the middle of the piston and can slide between the two movable pieces in the protective shell. Two limiting pieces are arranged on the side face of the cylinder body, located at the two ends of the protection shell and used for limiting the moving position of the moving piece. Hydraulic oil leaked in the working process of the piston can be collected, the hydraulic oil is prevented from leaking out of the cylinder body, and therefore the adverse effect on the outer wall of the cylinder body and peripheral equipment of the cylinder body caused by hydraulic oil leakage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of rotary cylinder technology, specifically to a rotary cylinder anti-oil leakage structure. Background Technology

[0002] A rotary cylinder is a hydraulic actuator that can convert hydraulic energy into mechanical energy to achieve rotary motion. It is widely used in many fields such as engineering machinery, machine tools, and automation equipment. It is generally composed of a housing, rotor, piston, oil inlet and outlet, output shaft, and limit structure. In use, hydraulic oil enters and exits through the oil inlet and outlet to drive the piston to slide, the piston drives the rotor to rotate, and finally drives the output shaft to output rotary motion.

[0003] To determine the rotation angle, a limiting structure is used to control the position of the piston's movement in order to control the output angle.

[0004] However, in actual use, the limiting structure is usually set inside the cylinder. During the piston's movement, a small amount of oil may seep into the limiting structure. Over time, hydraulic oil may seep out through the limiting structure, affecting the use of the rotary cylinder and its surrounding structure. Utility Model Content

[0005] The main purpose of this utility model is to provide an oil-proof structure for rotary cylinders, solving the problem that rotary cylinders are prone to oil leakage onto the surface of the housing.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A leak-proof structure for a rotary hydraulic cylinder includes a cylinder body, a piston inside the cylinder body, the piston being rod-shaped, and sealing rings at both ends of the piston.

[0008] The cylinder block is equipped with a protective shell on its side, and the two ends of the protective shell are equipped with movable parts;

[0009] The piston has a connecting piece in the middle that extends into the interior of the protective shell, and the connecting piece can slide between two moving parts inside the protective shell;

[0010] Two limiting members are provided on the side of the cylinder block. The limiting members are located at both ends of the protective shell and are used to restrict the movement of the moving parts.

[0011] In the preferred embodiment, the cylinder body is provided with a piston chamber for piston movement; the cylinder body is provided with two oil inlet and outlet ports, which are respectively connected to the piston chambers at both ends of the piston.

[0012] The piston has multiple toothed grooves in the middle; the toothed grooves are arranged evenly in sequence.

[0013] An output shaft is located inside the cylinder, and the output shaft extends out of the cylinder.

[0014] The output shaft is equipped with a gear, which meshes with the tooth groove.

[0015] In a preferred embodiment, the protective shell includes a shell connected to the cylinder body, a movable cavity is provided on the side of the shell near the cylinder body, and a movable groove is provided on the side of the cylinder body near the shell, with the movable groove communicating with the movable cavity;

[0016] The connection between the housing and the cylinder is sealed.

[0017] In a preferred embodiment, the movable component includes a movable rod that is slidably connected to the protective shell, the movable rod passing through the side wall of the protective shell, and both ends of the movable rod are provided with limiting plates;

[0018] One of the limiting plates at both ends of the movable rod is located inside the movable cavity, and the other is located outside the protective shell;

[0019] A sealing ring is provided between the movable rod and the protective shell;

[0020] A spring is attached to the outer sleeve of the movable rod, and the spring is located inside the movable cavity;

[0021] A knob is located on the side of the limiting plate outside the protective shell away from the movable rod. The knob is fixed with a threaded rod. The limiting plate and the movable rod are provided with screw holes, and the threaded rod is threaded into the screw holes.

[0022] In a preferred embodiment, the connector includes a connecting rod that passes through the movable groove;

[0023] One end of the connecting rod is provided with a threaded post, which is threadedly connected to the middle of the piston;

[0024] The other end of the connecting rod is equipped with a positioning rod, which is located between the two moving parts.

[0025] In a preferred embodiment, the limiting component includes a fixed plate connected to the cylinder body, and a protective plate and a sensor are provided on the side of the fixed plate near the movable component.

[0026] In the preferred embodiment, the centerline of the protective plate and the centerline of the moving part are coaxial.

[0027] This utility model provides an oil leakage prevention structure for a rotary hydraulic cylinder. By adopting the above solution, the following beneficial effects are achieved:

[0028] 1. It can collect the hydraulic oil that leaks out during the piston's operation, preventing the hydraulic oil from seeping outside the cylinder and thus avoiding adverse effects on the outer wall of the cylinder and surrounding equipment.

[0029] 2. The position of the limit switch can be adjusted to adapt to different limit switch requirements.

[0030] 3. It has a simple structure, is easy to process, has low processing costs, and is easy to replace. Attached Figure Description

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0032] Figure 1 This is a schematic diagram of the anti-oil leakage structure of a rotary cylinder according to the present invention;

[0033] Figure 2 This is a cross-sectional view of a rotary cylinder oil leakage prevention structure according to this utility model.

[0034] Figure 3 This is a cross-sectional view of an oil leakage prevention structure for a rotary cylinder according to this utility model;

[0035] Figure 4 yes Figure 3 A magnified structural diagram of point A in the middle.

[0036] In the picture:

[0037] Cylinder 1, oil inlet / outlet 101, piston 102, toothed groove 103, gear 104, output shaft 105, protective shell 2, housing 201, movable cavity 202, movable groove 203, movable part 3, movable rod 301, limiting plate 302, sealing ring 303, spring 304, knob 305, threaded rod 306, connector 4, connecting rod 401, threaded column 402, positioning rod 403, limiting part 5, fixing plate 501, protective plate 502, sensor 503. Detailed Implementation

[0038] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0039] like Figure 1 , 2 As shown in Figure 3, a rotary cylinder anti-oil leakage structure includes a cylinder body 1, a piston 102 is provided inside the cylinder body 1, the piston 102 is rod-shaped, and sealing rings are provided at both ends of the piston 102.

[0040] The cylinder body 1 is provided with a protective shell 2 on its side, and the protective shell 2 is provided with movable parts 3 at both ends;

[0041] The piston 102 has a connecting member 4 extending into the interior of the protective shell 2 at its middle part. The connecting member 4 can slide between two movable members 3 inside the protective shell 2.

[0042] Two limiting members 5 are provided on the side of the cylinder body 1. The limiting members 5 are located at both ends of the protective shell 2 and are used to limit the movement position of the movable member 3.

[0043] When in use, the piston 102 moves under the influence of hydraulic oil, which can drive the connecting part 4 to slide. When the connecting part 4 touches the moving part 3, the moving part 3 can complete the limit, so that the normal limit function can be realized. In addition, the hydraulic oil that leaks out of the piston 102 during operation will leak into the protective shell 2 and will not leak directly to the outside of the cylinder body 1, thereby avoiding the impact on the surrounding equipment and preventing the hydraulic oil from affecting the surface of the cylinder body 1.

[0044] In a preferred embodiment, the cylinder body 1 is provided with a piston chamber for the piston 102 to move; the cylinder body 1 is provided with two oil inlet and outlet ports 101, which are respectively connected to the piston chambers at both ends of the piston 102, and the oil inlet and outlet ports 101 are connected to the existing hydraulic system.

[0045] The piston 102 has multiple toothed grooves 103 in the middle; the toothed grooves 103 are arranged evenly in sequence.

[0046] The cylinder body 1 is provided with an output shaft 105, which extends out of the cylinder body 1. Both ends of the output shaft 105 can be connected to a load as needed.

[0047] The output shaft 105 is equipped with a gear 104, which meshes with the tooth groove 103.

[0048] During normal operation, when the hydraulic system supplies oil through the inlet and outlet ports 101, the piston 102 moves under the influence of hydraulic pressure. This movement, through the meshing of the toothed groove 103 and the gear 104, drives the output shaft 105 to rotate, thus converting the linear motion of the piston into the rotational motion of the output shaft to meet different work requirements.

[0049] In a further embodiment, the protective shell 2 includes a shell 201 connected to the cylinder body 1. The shell 201 has a movable cavity 202 on the side near the cylinder body 1, and the cylinder body 1 has a movable groove 203 on the side near the shell 201. The movable groove 203 communicates with the movable cavity 202.

[0050] The housing 201 and the cylinder 1 can be connected by screws for easy replacement.

[0051] The connection between the housing 201 and the cylinder 1 is sealed to prevent oil from leaking to the outside of the cylinder 1. The connection between the housing 201 and the cylinder 1 is sealed to prevent oil from leaking out from the connection, further ensuring the oil leakage prevention effect. The sealing structure uses sealing gaskets, etc.

[0052] During the movement of piston 102, the leaked hydraulic oil will accumulate in the moving groove 203 and the moving cavity 202 and will not leak out directly; at the same time, an oil outlet pipe can be connected to the side of housing 201. The oil outlet pipe is sealed by a sealing plug. When it is necessary to deal with the oil leakage inside the moving groove 203, the sealing plug can be removed to discharge the hydraulic oil in the moving cavity 202 through the oil outlet pipe.

[0053] In a further embodiment, such as Figure 2 , 3 As shown in Figures 4 and 5, the movable component 3 includes a movable rod 301 that is slidably connected to the protective shell 2. The movable rod 301 penetrates the side wall of the protective shell 2, and both ends of the movable rod 301 are provided with limiting plates 302.

[0054] The limiting plates 302 at both ends of the movable rod 301 are located inside the movable cavity 202 and outside the protective shell 2. This design can effectively limit the sliding range of the movable rod 301 and prevent it from falling out of the protective shell 2.

[0055] A sealing ring 303 is provided between the movable rod 301 and the protective shell 2. The sealing ring 303 can prevent oil from leaking from the gap between the movable rod 301 and the protective shell 2.

[0056] A spring 304 is sleeved on the movable rod 301, and the spring 304 is located inside the movable cavity 202. The function of the spring 304 is to provide a certain elastic restoring force to the movable rod 301, so that the movable rod 301 and the limiting plate 302 can return to their initial positions after being subjected to external force.

[0057] A knob 305 is provided on the side of the limiting plate 302 located outside the protective shell 2 away from the movable rod 301. The knob 305 is fixed with a threaded rod 306. The limiting plate 302 and the movable rod 301 are provided with screw holes, and the threaded rod 306 is threaded into the screw holes.

[0058] When the piston 102 moves to the end of its stroke, it will cause the connecting rod 401 to touch the limiting plate 302, and then push the limiting plate 302 and the moving rod 301 to move a distance, so that the knob 305 touches the limiting member 5, which can play the role of buffering and limiting.

[0059] Furthermore, turning the knob 305 can drive the threaded rod 306 to rotate, thereby adjusting the position of the threaded rod 306, that is, changing the distance between the knob 305 and the movable rod 301, thereby changing the timing when the knob 305 touches the limiting member 5, achieving the purpose of adjusting the limiting position, and ultimately changing the angle of rotation output.

[0060] In a preferred embodiment, the connector 4 includes a connecting rod 401 that passes through the movable groove 203; the connecting rod 401 can slide within the movable groove 203.

[0061] One end of the connecting rod 401 is provided with a threaded post 402, which is threadedly connected to the middle of the piston 102 to ensure a firm connection;

[0062] The other end of the connecting rod 401 is provided with a positioning rod 403, which is located between the two movable parts 3.

[0063] When the piston 102 slides, it will drive the connecting rod 401 and the positioning rod 403 to slide in the movable groove 203 and the movable cavity 202 until the positioning rod 403 touches the limiting plate 302.

[0064] In a preferred embodiment, the limiting member 5 includes a fixing plate 501 connected to the cylinder body 1, and the fixing plate 501 is provided with a protective plate 502 and a sensor 503 on the side near the movable member 3.

[0065] In the preferred embodiment, the centerline of the protective plate 502 and the centerline of the movable part 3 are coaxial.

[0066] The protective plate 502 can buffer and protect the moving part 3 when it moves to its limit position, preventing the moving part 3 from being damaged due to excessive movement. The material of the protective plate 502 can be rubber.

[0067] Sensor 503 can monitor the position information of moving part 3 in real time. When moving part 3 approaches or reaches the limit position, sensor 503 will feed back the signal to the control system so that corresponding control measures can be taken in time, which further improves the safety and reliability of the entire rotary cylinder structure. Sensor 503 is preferably an infrared sensor, and the control system can be the control unit of the existing hydraulic control system.

[0068] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A leak-proof structure for a rotary hydraulic cylinder, characterized in that: Includes a cylinder body (1), inside which is a piston (102), the piston (102) is rod-shaped, and sealing rings are provided at both ends of the piston (102); The cylinder body (1) is provided with a protective shell (2) on the side, and the two ends of the protective shell (2) are provided with movable parts (3); The piston (102) has a connecting member (4) in the middle that extends into the interior of the protective shell (2), and the connecting member (4) can slide between two movable members (3) inside the protective shell (2); The cylinder body (1) has two limiting members (5) on its side. The limiting members (5) are located at both ends of the protective shell (2) and are used to limit the movement position of the movable part (3).

2. The anti-oil leakage structure for a rotary cylinder according to claim 1, characterized in that: The cylinder body (1) is provided with a piston chamber for the movement of the piston (102); the cylinder body (1) is provided with two oil inlet and outlet passages (101), which are respectively connected to the piston chambers at both ends of the piston (102); The piston (102) has multiple toothed grooves (103) in the middle; the toothed grooves (103) are arranged evenly in sequence; The cylinder body (1) is provided with an output shaft (105), which extends out of the cylinder body (1); The output shaft (105) is equipped with a gear (104), which meshes with the tooth groove (103).

3. The anti-oil leakage structure for a rotary cylinder according to claim 1, characterized in that: The protective shell (2) includes a shell (201) connected to the cylinder (1), the shell (201) has a movable cavity (202) on the side near the cylinder (1), and the cylinder (1) has a movable groove (203) on the side near the shell (201), the movable groove (203) is connected to the movable cavity (202); The connection between the housing (201) and the cylinder (1) is sealed.

4. The anti-oil leakage structure for a rotary cylinder according to claim 3, characterized in that: The movable part (3) includes a movable rod (301) that is slidably connected to the protective shell (2). The movable rod (301) passes through the side wall of the protective shell (2). Both ends of the movable rod (301) are provided with limiting plates (302). The limiting plates (302) at both ends of the movable rod (301) are located inside the movable cavity (202) and outside the protective shell (2); A sealing ring (303) is provided between the movable rod (301) and the protective shell (2); A spring (304) is attached to the outer sleeve of the movable rod (301), and the spring (304) is located inside the movable cavity (202); A knob (305) is provided on the side of the limiting plate (302) located outside the protective shell (2) away from the movable rod (301). The knob (305) is fixed with a threaded rod (306). The limiting plate (302) and the movable rod (301) are provided with screw holes, and the threaded rod (306) is threaded into the screw hole.

5. The anti-oil leakage structure for a rotary cylinder according to claim 3, characterized in that: The connector (4) includes a connecting rod (401) that passes through a movable slot (203); One end of the connecting rod (401) is provided with a threaded post (402), which is threadedly connected to the middle of the piston (102); The other end of the connecting rod (401) is provided with a positioning rod (403), which is located between the two movable parts (3).

6. The anti-oil leakage structure for a rotary cylinder according to claim 1, characterized in that: The limiting member (5) includes a fixed plate (501) connected to the cylinder (1), and a protective plate (502) and a sensor (503) are provided on the side of the fixed plate (501) near the movable member (3).

7. The anti-oil leakage structure for a rotary cylinder according to claim 6, characterized in that: The centerline of the protective plate (502) and the centerline of the movable part (3) are coaxial.

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