Oil cylinder of hydraulic control system

Abstract

The utility model provides an oil cylinder of a hydraulic control system, which belongs to the technical field of oil cylinders and comprises a shell, a piston rod slidably connected in the shell, penetrating through one end of the shell and extending outwards, a mounting groove formed in the inward end of the piston rod, an oil hole formed in the side portion of the shell, and a positioning shaft rotatably connected to the other end of the shell. A hexagonal rod is fixedly connected to the end, close to the piston rod, of the positioning shaft and slidably arranged in the mounting groove, and a rotating mechanism is arranged at the end, close to the positioning shaft, of the shell. Compared with an existing oil cylinder structure which can only rotate, the oil cylinder structure has the advantages of being higher in practicability and capable of being used in a multifunctional mode.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil cylinders, and in particular relates to an oil cylinder of a hydraulic control system. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation. When it is used to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the motion is smooth, so it is widely used in the hydraulic systems of various machines. The output force of the hydraulic cylinder is proportional to the effective area of ​​the piston and the pressure difference on both sides; the hydraulic cylinder is basically composed of a cylinder barrel and a cylinder head, a piston and a piston rod, a sealing device, a buffer device and an exhaust device. The buffer device and the exhaust device depend on the specific application, and other devices are indispensable.

[0003] In the prior art, a Chinese patent with application number CN201110256362.3 discloses a telescopic rotary hydraulic cylinder, which includes a cylinder body, a piston and a piston rod. The piston rod is provided on both sides of the piston. A rotary guide device is provided between the piston rod and the cylinder body on at least one side of the piston. The rotary guide device includes a spiral guide groove provided on the piston rod, and a limit screw plug is fixed on the inner wall of the cylinder body in cooperation with the spiral guide groove. The limit screw plug is stuck in the spiral guide groove and can slide along the spiral guide groove. The above telescopic rotary hydraulic cylinder is provided with a spiral guide groove and a limit pin that cooperate with each other between the piston rod and the cylinder body. When the piston rod of the hydraulic cylinder is performing linear motion, the limit pin stuck in the spiral guide groove will drive the piston rod to rotate at the same time, so as to realize the piston rod to complete the rotation action while performing linear motion. Not only is the structure simple and the action reliable; but also the additional mechanism required to complete the compound action is omitted, the cost is reduced, and the economic benefit is improved.

[0004] Many external components driven by the hydraulic cylinder require not only linear travel but also rotational motion, but the hydraulic cylinder itself cannot achieve rotational motion. The above scheme adopts the method of adding auxiliary mechanisms to achieve the rotational motion of the hydraulic cylinder. However, in this scheme, the piston rod rotates every time it is extended or retracted, and cannot be controlled as needed. For this reason, we propose a cylinder with a hydraulic control system. Utility Model Content

[0005] The utility model aims to provide an oil cylinder of a hydraulic control system, aiming to solve the problems raised in the background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A hydraulic cylinder of a hydraulic control system comprises an outer shell, a piston rod is slidably connected to the inner shell, the piston rod passes through one end of the outer shell and extends outward, a mounting groove is provided at the inward end of the piston rod, an oil hole is provided at the side of the outer shell, a positioning shaft is rotatably connected to the other end of the outer shell, a hexagonal rod is fixedly connected to the end of the positioning shaft close to the piston rod, the hexagonal rod is slidably arranged in the mounting groove, and a rotating mechanism is provided at the end of the outer shell close to the positioning shaft.

[0008] As a preferred solution of the utility model, the rotating mechanism includes a first bevel gear, a second bevel gear, a servo motor and a protective shell, the first bevel gear is fixedly connected to the end of the positioning shaft, the protective shell is fixedly connected to one end of the outer shell close to the positioning shaft, the servo motor is fixedly connected to the side of the protective shell, the second bevel gear is fixedly connected to the output end of the servo motor, and the first bevel gear is meshed with the second bevel gear.

[0009] As a preferred solution of the utility model, the inward end of the piston rod is detachably connected with a hexagonal plug, a hexagonal groove is provided at the center of the hexagonal plug, and the hexagonal rod is slidably connected in the hexagonal groove.

[0010] As a preferred solution of the utility model, a through hole and a mounting hole are provided on the side of the hexagonal plug, and a bolt is installed in the mounting hole.

[0011] As a preferred solution of the utility model, a bearing is installed on the circumferential surface of the positioning shaft, and an oil seal is embedded on the circumferential surface of the bearing.

[0012] As a preferred solution of the utility model, the first bevel gear and the second bevel gear are both located in the protective shell.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. When this solution is used, the hydraulic oil enters the housing through the oil hole to push the piston rod to extend and retract, thereby realizing the basic extension and retraction function. When the piston rod needs to rotate, the second bevel gear is driven to rotate through the output end of the servo motor, and the second bevel gear drives the first bevel gear to reduce speed and rotate. The first bevel gear, the positioning shaft and the hexagonal rod are a whole, which in turn drives the hexagonal rod to rotate, the hexagonal rod drives the hexagonal plug to rotate, and finally drives the piston rod to rotate. Whether the piston rod rotates can be controlled according to needs. Compared with the existing oil cylinder structure that can only rotate, it is more practical and can be used for multiple functions.

[0015] 2. The protective shell of this solution can protect the first bevel gear and the second bevel gear, prevent dust from entering, and prevent collision with foreign objects, thereby improving safety and extending service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0017] In the attached picture:

[0018] Figure 1 It is an overall diagram of the utility model;

[0019] Figure 2 It is a cross-sectional view of the utility model;

[0020] Figure 3 This is a diagram of the rotating mechanism of the utility model;

[0021] Figure 4 For the utility model Figure 3 Exploded diagram of

[0022] Figure 5 This is a structural diagram of a hexagonal plug of the utility model.

[0023] In the figure: 1. outer shell; 2. piston rod; 3. mounting groove; 4. positioning shaft; 5. bearing; 6. oil seal; 7. first bevel gear; 8. second bevel gear; 9. servo motor; 10. hexagonal rod; 11. hexagonal plug; 1101. hexagonal groove; 1102. through hole; 1103. mounting hole; 12. oil hole; 13. protective shell. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example

[0026] See also Figure 1-Figure 5 , the technical solution provided by this embodiment is as follows:

[0027] A hydraulic cylinder of a hydraulic control system comprises a shell 1, a piston rod 2 is slidably connected inside the shell 1, the piston rod 2 passes through one end of the shell 1 and extends outward, a mounting groove 3 is provided at the inward end of the piston rod 2, an oil hole 12 is provided on the side of the shell 1, a positioning shaft 4 is rotatably connected to the other end of the shell 1, a hexagonal rod 10 is fixedly connected to the end of the positioning shaft 4 close to the piston rod 2, the hexagonal rod 10 is slidably arranged in the mounting groove 3, and a rotating mechanism is provided at the end of the shell 1 close to the positioning shaft 4.

[0028] In the specific embodiment of the utility model, the piston rod 2 is a commonly used piston structure, one end of the piston rod 2 is located on the outside of the shell 1, and the other end is located in the piston rod 2. The mounting groove 3 is opened at the inward end of the piston rod 2, and the diameter of the mounting groove 3 is larger than the hexagonal rod 10. The end of the hexagonal rod 10 is always located in the mounting groove 3, and the hexagonal plug 11 is fixed at the outlet of the mounting groove 3 by bolts. When in use, hydraulic oil enters the shell 1 through the oil hole 12 to promote the extension and retraction of the piston rod 2 to achieve the basic extension and retraction function. When the piston rod 2 needs to rotate, the second bevel gear 8 is driven to rotate by the output end of the servo motor 9, and the second bevel gear 8 drives the first bevel gear 7 to reduce the rotation. The first bevel gear 7, the positioning shaft 4 and the hexagonal rod 10 are a whole, which then drives the hexagonal rod 10 to rotate, the hexagonal rod 10 drives the hexagonal plug 11 to rotate, and finally drives the piston rod 2 to rotate. Whether the piston rod 2 rotates can be controlled according to needs. Compared with the existing oil cylinder structure that can only rotate, it is more practical and can be used for multiple functions.

[0029] Specifically, the rotating mechanism includes a first bevel gear 7, a second bevel gear 8, a servo motor 9 and a protective shell 13. The first bevel gear 7 is fixedly connected to the end of the positioning shaft 4, the protective shell 13 is fixedly connected to one end of the outer shell 1 close to the positioning shaft 4, the servo motor 9 is fixedly connected to the side of the protective shell 13, the second bevel gear 8 is fixedly connected to the output end of the servo motor 9, the first bevel gear 7 is meshed with the second bevel gear 8, and the inward end of the piston rod 2 is detachably connected with a hexagonal plug 11, a hexagonal groove 1101 is opened at the center of the hexagonal plug 11, and the hexagonal rod 10 is slidably connected in the hexagonal groove 1101.

[0030] In a specific embodiment of the utility model, the servo motor 9 is located on the outside of the protective shell 13, and the second bevel gear 8 is driven to rotate by the output end of the servo motor 9. The second bevel gear 8 drives the positioning shaft 4 to rotate at a reduced speed. The positioning shaft 4, the first bevel gear 7 and the hexagonal rod 10 are an integral structure, which in turn drives the positioning shaft 4, the first bevel gear 7 and the hexagonal rod 10 to rotate synchronously. The hexagonal plug 11 is used to limit the sliding of the hexagonal rod 10. When the hexagonal rod 10 rotates, it drives the hexagonal plug 11 to rotate, and finally drives the piston rod 2 to rotate slowly, thereby realizing the control of the piston rod 2 for rotation.

[0031] Specifically, a through hole 1102 and a mounting hole 1103 are formed on the side of the hexagonal plug 11 , and a bolt is installed in the mounting hole 1103 .

[0032] In a specific embodiment of the utility model, the through hole 1102 is used to connect the inner cavity space of the mounting groove 3 and the piston rod 2. The hydraulic oil can enter the mounting groove 3 through the through hole 1102. The internal pressure of the mounting groove 3 will not be changed due to the expansion and contraction of the hexagonal rod 10. The mounting hole 1103 is used to install bolts to fix the inward end of the piston rod 2. The assembled structure is reasonable in structure.

[0033] Specifically, a bearing 5 is installed on the circumferential surface of the positioning shaft 4 , and an oil seal 6 is embedded on the circumferential surface of the bearing 5 .

[0034] In a specific embodiment of the present utility model, the bearing 5 is used to support the rotation of the positioning shaft 4, and the design of the oil seal 6 prevents leakage of hydraulic oil and supports the stable rotation of the positioning shaft 4.

[0035] Specifically, the first bevel gear 7 and the second bevel gear 8 are both located in the protective shell 13 .

[0036] In a specific embodiment of the present utility model, the protective shell 13 is used to protect the first bevel gear 7 and the second bevel gear 8 to prevent dust from entering and to prevent collision with foreign objects, thereby improving safety.

[0037] Working principle: When in use, hydraulic oil enters the housing 1 through the oil hole 12 to push the piston rod 2 to extend and retract, thereby realizing the basic telescopic function. When the piston rod 2 needs to rotate, the second bevel gear 8 is driven to rotate through the output end of the servo motor 9, and the second bevel gear 8 drives the first bevel gear 7 to decelerate and rotate. The first bevel gear 7, the positioning shaft 4 and the hexagonal rod 10 are a whole, which then drives the hexagonal rod 10 to rotate, and the hexagonal rod 10 drives the hexagonal plug 11 to rotate, and finally drives the piston rod 2 to rotate. Whether the piston rod 2 rotates can be controlled as needed. Compared with the existing oil cylinder structure that can only rotate, it is more practical and can be used for multiple functions.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A hydraulic cylinder of a hydraulic control system, characterized in that: The invention comprises a shell (1), a piston rod (2) being slidably connected inside the shell (1), the piston rod (2) passing through one end of the shell (1) and extending outwards, a mounting groove (3) being provided at the inward end of the piston rod (2), an oil hole (12) being provided at the side of the shell (1), a positioning shaft (4) being rotatably connected at the other end of the shell (1), a hexagonal rod (10) being fixedly connected at one end of the positioning shaft (4) close to the piston rod (2), the hexagonal rod (10) being slidably arranged in the mounting groove (3), and a rotating mechanism being provided at one end of the shell (1) close to the positioning shaft (4).

2. The oil cylinder of a hydraulic control system according to claim 1, characterized in that: The rotating mechanism comprises a first bevel gear (7), a second bevel gear (8), a servo motor (9) and a protective shell (13); the first bevel gear (7) is fixedly connected to the end of the positioning shaft (4); the protective shell (13) is fixedly connected to an end of the housing (1) close to the positioning shaft (4); the servo motor (9) is fixedly connected to the side of the protective shell (13); the second bevel gear (8) is fixedly connected to the output end of the servo motor (9); and the first bevel gear (7) is meshed with the second bevel gear (8).

3. The oil cylinder of a hydraulic control system according to claim 2, characterized in that: The inward end of the piston rod (2) is detachably connected to a hexagonal plug (11), a hexagonal groove (1101) is provided at the center of the hexagonal plug (11), and the hexagonal rod (10) is slidably connected in the hexagonal groove (1101).

4. The oil cylinder of the hydraulic control system according to claim 3, characterized in that: A through hole (1102) and a mounting hole (1103) are provided on the side of the hexagonal plug (11), and a bolt is installed in the mounting hole (1103).

5. The oil cylinder of the hydraulic control system according to claim 4, characterized in that: A bearing (5) is installed on the circumferential surface of the positioning shaft (4), and an oil seal (6) is embedded on the circumferential surface of the bearing (5).

6. The oil cylinder of the hydraulic control system according to claim 5, characterized in that: The first bevel gear (7) and the second bevel gear (8) are both located in the protective shell (13).

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