Protective device for hydraulic oil cylinder of excavator

Abstract

The utility model discloses a protective device for a hydraulic oil cylinder of an excavator, and relates to the technical field of upper structures and supporting of the structures. The protective device of the excavator hydraulic oil cylinder comprises the hydraulic oil cylinder, a cylinder barrel fixing block is fixedly connected to the surface of the hydraulic oil cylinder, a hydraulic oil cylinder piston plate is slidably connected into the hydraulic oil cylinder, and a hydraulic oil cylinder supporting rod is fixedly connected to the surface of the hydraulic oil cylinder piston plate. The end, away from the hydraulic oil cylinder piston plate, of the hydraulic oil cylinder supporting rod extends to the outer portion of the hydraulic oil cylinder, the end, away from the hydraulic oil cylinder piston plate, of the hydraulic oil cylinder supporting rod is fixedly connected with a cylinder barrel transmission block, and a hydraulic oil cylinder oil conveying pipe is arranged on the side wall of the hydraulic oil cylinder. The structure can comprehensively protect the oil cylinder; and through mutual cooperation of the protection structures, the oil cylinder can be effectively and comprehensively protected, and the situation that the oil cylinder is damaged under the action of external force during working is avoided.

Description

Technical Field

[0001] The utility model relates to an upper structure, and particularly to a protective device for a hydraulic cylinder of an excavator. 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. As a common component in excavators, the hydraulic cylinder plays the role of an actuator in the working device. It is divided into boom cylinders, boom cylinders and bucket cylinders. With the mutual cooperation of the three types of cylinders, the excavator has strong digging force, among which the thrust provided by the bucket cylinder accounts for the vast majority of the digging force. Hydraulic excavators usually work in an open-air environment, which is also a difficult test for the quality of the cylinder.

[0003] When the excavator is digging for loose material blocks at a high place, the material blocks will fall from a high place and hit the hydraulic cylinder. The powdered hard material will fall on the piston rod of the hydraulic cylinder and cause contamination of the piston rod of the hydraulic cylinder. When the excavator is digging downward, objects with a certain height may hit the hydraulic cylinder. The hydraulic cylinder has no protection, and the external force from the material is resisted by the cylinder barrel or piston of the hydraulic cylinder, which can easily cause damage to the hydraulic cylinder and affect the normal operation of the excavator. Therefore, it is urgent to design a protective device that can saturate the hydraulic cylinder. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art and to provide a protective device for the hydraulic cylinder of an excavator, which can solve the problem of damage to the cylinder due to external force during operation.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: a protective device for a hydraulic cylinder of an excavator, comprising a hydraulic cylinder, a cylinder barrel fixing block is fixedly connected to the surface of the hydraulic cylinder, a hydraulic cylinder piston plate is slidably connected to the inside of the hydraulic cylinder, a hydraulic cylinder support rod is fixedly connected to the surface of the hydraulic cylinder piston plate, the hydraulic cylinder piston plate divides the inside of the hydraulic cylinder into two parts, the part close to the cylinder barrel fixing block is a hydraulic chamber, and the part close to the hydraulic cylinder support rod is an activity chamber;

[0006] Among them, one end of the hydraulic cylinder support rod away from the hydraulic cylinder piston plate extends to the outside of the hydraulic cylinder, one end of the hydraulic cylinder support rod away from the hydraulic cylinder piston plate is fixedly connected to the cylinder transmission block, and the side wall of the hydraulic cylinder is provided with a hydraulic cylinder oil delivery pipe, and also includes:

[0007] A protective structure arranged outside the hydraulic cylinder for protecting the hydraulic cylinder, which can provide comprehensive protection for the cylinder;

[0008] A heat dissipation structure is arranged outside the hydraulic cylinder to cool the hydraulic cylinder. This structure can cool and dissipate heat from the hydraulic cylinder to ensure normal operation of the hydraulic cylinder.

[0009] Preferably, the protective structure for protecting the hydraulic cylinder includes a first cylinder protective cylinder, which is fixedly connected to the outer surface of the hydraulic cylinder, and the surface of the first cylinder protective cylinder is provided with four sliding grooves, and the inner wall of the first cylinder protective cylinder is slidingly connected to the second cylinder protective cylinder, and the surface of the second cylinder protective cylinder is fixedly connected with four sliding blocks, and the inner wall of the second cylinder protective cylinder is fixedly sleeved with a reinforcement ring, and the cooperation of the first cylinder protective cylinder and the second cylinder protective cylinder can provide comprehensive protection for the cylinder to avoid damage to the cylinder due to external force during operation.

[0010] Preferably, the four sliding grooves are arranged in a 90-degree circular array, the four sliding blocks are arranged in a 90-degree circular array, the four sliding blocks are slidably connected to the corresponding four sliding grooves respectively, and the second protective tube of the cylinder is fixedly connected to the hydraulic cylinder support rod.

[0011] Preferably, the heat dissipation structure for cooling the hydraulic cylinder includes a heat sink, which is fixedly connected to the outer surface of the hydraulic cylinder, and a heat dissipation hole is opened on the surface of the first protective tube of the cylinder, and two support blocks are fixedly connected to the surface of the heat dissipation hole, and the tops of the two support blocks are fixedly connected to a fixing frame, and the surface of the fixing frame is fixedly connected to a rotating motor, and the output end of the rotating motor is fixedly connected to a rotating shaft, and the end of the rotating shaft away from the rotating motor is fixedly connected to a fan blade, and the cooperation between the fan blade and the heat sink can effectively cool down the cylinder and avoid the situation where the high temperature of the cylinder affects the work during operation.

[0012] Preferably, the heat dissipation hole is communicated with the interior of the first protective tube of the oil cylinder, and one end of the rotating shaft away from the rotating motor rotates through the fixing frame and extends to the interior of the heat dissipation hole.

[0013] Preferably, one end of the hydraulic cylinder oil delivery pipe is communicated with the hydraulic chamber of the hydraulic cylinder, and the other end is communicated with the active chamber of the hydraulic cylinder.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] (1) The protective device of the hydraulic cylinder of the excavator can effectively and comprehensively protect the cylinder through the mutual cooperation of the protective structure, avoid the cylinder being damaged by external force during operation, improve the practicality, ensure the normal operation of the cylinder, enhance the protection of the cylinder, and reduce the damage rate of the cylinder.

[0016] (2) The protective device of the hydraulic cylinder of the excavator can effectively cool down and dissipate the heat of the cylinder through the cooperation of the heat dissipation mechanism, thereby avoiding the situation where the high temperature of the cylinder affects the work during operation, improving the heat dissipation efficiency of the cylinder, which is beneficial to prolonging the service life of the cylinder, improving practicality, and ensuring the normal operation of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 It is a schematic diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the fan blade of the utility model;

[0020] Figure 3 This is a schematic diagram of the reinforcement ring of the utility model;

[0021] Figure 4 It is a schematic diagram of the heat sink of the utility model.

[0022] Figure numerals: 1. Hydraulic cylinder; 2. Cylinder fixing block; 3. Hydraulic cylinder piston plate; 4. Hydraulic cylinder support rod; 5. Cylinder transmission block; 6. Hydraulic cylinder oil pipe; 7. First cylinder protective cylinder; 8. Sliding groove; 9. Second cylinder protective cylinder; 10. Sliding block; 11. Reinforcement ring; 12. Heat dissipation hole; 13. Support block; 14. Fixed frame; 15. Rotating motor; 16. Rotating shaft; 17. Fan blades; 18. Heat sink. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0024] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and 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, and therefore cannot be understood as a limitation on the present invention.

[0025] In the description of the present utility model, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0027] See also Figure 1-4 The utility model provides a technical solution: a protective device for an excavator hydraulic cylinder, comprising a hydraulic cylinder 1, a cylinder fixing block 2 is fixedly connected to the surface of the hydraulic cylinder 1, a hydraulic cylinder piston plate 3 is slidably connected to the inside of the hydraulic cylinder 1, a hydraulic cylinder support rod 4 is fixedly connected to the surface of the hydraulic cylinder piston plate 3, the hydraulic cylinder piston plate 3 divides the inside of the hydraulic cylinder 1 into two parts, the part close to the cylinder fixing block 2 is a hydraulic chamber, the part close to the hydraulic cylinder support rod 4 is an active chamber, one end of the hydraulic cylinder support rod 4 away from the hydraulic cylinder piston plate 3 extends to the outside of the hydraulic cylinder 1, and one end of the hydraulic cylinder support rod 4 away from the hydraulic cylinder piston plate 3 is fixedly connected to the cylinder transmission block 5;

[0028] Among them, a hydraulic cylinder oil delivery pipe 6 is provided on the side wall of the hydraulic cylinder 1, one end of the hydraulic cylinder oil delivery pipe 6 is connected to the hydraulic chamber of the hydraulic cylinder 1, and the other end is connected to the activity chamber of the hydraulic cylinder 1. The hydraulic cylinder oil delivery pipe 6 is used to change the internal pressure of the hydraulic chamber and the activity chamber, so that the hydraulic cylinder support rod 4 can be telescopic. It also includes: a protective structure for protecting the hydraulic cylinder arranged outside the hydraulic cylinder 1, which can provide comprehensive protection for the cylinder; a heat dissipation structure for cooling the hydraulic cylinder arranged outside the hydraulic cylinder 1, which can cool and dissipate heat for the hydraulic cylinder to ensure the normal operation of the hydraulic cylinder;

[0029] Among them, the protective structure for protecting the hydraulic cylinder includes a first cylinder protective tube 7, which is fixedly connected to the outer surface of the hydraulic cylinder 1, and four sliding grooves 8 are opened on the surface of the first cylinder protective tube 7, and the four sliding grooves 8 are arranged in a ninety-degree circular array. The inner wall of the first cylinder protective tube 7 is slidably connected to the second cylinder protective tube 9, and the surface of the second cylinder protective tube 9 is fixedly connected to four sliding blocks 10, and the four sliding blocks 10 are arranged in a ninety-degree circular array. The four sliding blocks 10 are respectively slidably connected to the corresponding four sliding grooves 8, and the inner wall of the second cylinder protective tube 9 is fixedly sleeved with a reinforcement ring 11, and the second cylinder protective tube 9 is fixedly connected to the hydraulic cylinder support rod 4. The cooperation of the first cylinder protective tube 7 and the second cylinder protective tube 9 can comprehensively protect the cylinder to avoid damage to the cylinder due to external force during operation;

[0030] Among them, the heat dissipation structure for cooling the hydraulic cylinder includes a heat sink 18, which is fixedly connected to the outer surface of the hydraulic cylinder 1, and a heat dissipation hole 12 is opened on the surface of the first protective tube 7 of the cylinder, and the heat dissipation hole 12 is connected to the inside of the first protective tube 7 of the cylinder. Two support blocks 13 are fixedly connected to the surface of the heat dissipation hole 12, and a fixing frame 14 is fixedly connected to the top of the two support blocks 13. A rotating motor 15 is fixedly connected to the surface of the fixing frame 14, and a rotating shaft 16 is fixedly connected to the output end of the rotating motor 15. The end of the rotating shaft 16 away from the rotating motor 15 rotates through the fixing frame 14 and extends to the inside of the heat dissipation hole 12. The end of the rotating shaft 16 away from the rotating motor 15 is fixedly connected to a fan blade 17. The cooperation between the fan blade 17 and the heat sink 18 can effectively cool down and dissipate the heat of the cylinder, thereby avoiding the situation where the high temperature of the cylinder affects the work during operation.

[0031] Working principle: When the cylinder is working, the hydraulic cylinder support rod 4 will extend and retract, and the hydraulic cylinder support rod 4 will drive the second protective cylinder 9 of the cylinder to move. The first protective cylinder 7 and the second protective cylinder 9 of the cylinder can be extended and retracted by sliding, thereby providing comprehensive protection for the cylinder. At the same time, when the cylinder is working, the rotating motor 15 is started. The rotation of the rotating motor 15 can be driven by the rotating shaft 16, and finally drive the rotation of the fan blades 17, so as to dissipate heat for the cylinder and avoid the high temperature of the cylinder affecting the work. After the cylinder is working, the rotating motor 15 can be turned off.

[0032] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A protective device for an excavator hydraulic cylinder, comprising a hydraulic cylinder (1), a cylinder barrel fixing block (2) being fixedly connected to the surface of the hydraulic cylinder (1), a hydraulic cylinder piston plate (3) being slidably connected to the interior of the hydraulic cylinder (1), a hydraulic cylinder support rod (4) being fixedly connected to the surface of the hydraulic cylinder piston plate (3), the hydraulic cylinder piston plate (3) dividing the interior of the hydraulic cylinder (1) into two parts, the part close to the cylinder barrel fixing block (2) being a hydraulic chamber, and the part close to the hydraulic cylinder support rod (4) being a movable chamber; in, One end of the hydraulic cylinder support rod (4) away from the hydraulic cylinder piston plate (3) extends to the outside of the hydraulic cylinder (1), and one end of the hydraulic cylinder support rod (4) away from the hydraulic cylinder piston plate (3) is fixedly connected to a cylinder transmission block (5), and a hydraulic cylinder oil delivery pipe (6) is provided on the side wall of the hydraulic cylinder (1), characterized in that it also includes: A protective structure arranged outside the hydraulic cylinder (1) for protecting the hydraulic cylinder, the structure being capable of providing comprehensive protection for the cylinder; A heat dissipation structure arranged outside the hydraulic cylinder (1) for cooling the hydraulic cylinder, the structure being capable of cooling and dissipating the hydraulic cylinder to ensure normal operation of the hydraulic cylinder; The protection structure for protecting the hydraulic cylinder comprises a first cylinder protection tube (7), which is fixedly connected to the outer surface of the hydraulic cylinder (1), and the surface of the first cylinder protection tube (7) is provided with four sliding grooves (8), the inner wall of the first cylinder protection tube (7) is slidably connected to a second cylinder protection tube (9), the surface of the second cylinder protection tube (9) is fixedly connected to four sliding blocks (10), and the inner wall of the second cylinder protection tube (9) is fixedly sleeved with a reinforcement ring (11). The cooperation of the first cylinder protection tube (7) and the second cylinder protection tube (9) can provide comprehensive protection for the cylinder to avoid damage to the cylinder due to external force during operation.

2. The protective device for the hydraulic cylinder of an excavator according to claim 1, characterized in that: The four sliding grooves (8) are arranged in a 90-degree circular array, the four sliding blocks (10) are arranged in a 90-degree circular array, the four sliding blocks (10) are respectively slidably connected to the corresponding four sliding grooves (8), and the second protective cylinder (9) is fixedly connected to the hydraulic cylinder support rod (4).

3. The protective device for the hydraulic cylinder of an excavator according to claim 1, characterized in that: The heat dissipation structure for cooling the hydraulic cylinder comprises a heat sink (18), the heat sink (18) is fixedly connected to the outer surface of the hydraulic cylinder (1), a heat dissipation hole (12) is provided on the surface of the first protective tube (7) of the cylinder, two support blocks (13) are fixedly connected to the surface of the heat dissipation hole (12), the tops of the two support blocks (13) are fixedly connected to a fixing frame (14), the surface of the fixing frame (14) is fixedly connected to a rotating motor (15), the output end of the rotating motor (15) is fixedly connected to a rotating shaft (16), and the end of the rotating shaft (16) away from the rotating motor (15) is fixedly connected to a fan blade (17), the cooperation between the fan blade (17) and the heat sink (18) can effectively cool and dissipate the heat of the cylinder, and avoid the situation where the high temperature of the cylinder affects the work during operation.

4. The protective device for the hydraulic cylinder of an excavator according to claim 3, characterized in that: The heat dissipation hole (12) is connected to the interior of the first protective tube (7) of the oil cylinder, and one end of the rotating shaft (16) away from the rotating motor (15) rotates through the fixing frame (14) and extends to the interior of the heat dissipation hole (12).

5. The protective device for the hydraulic cylinder of an excavator according to claim 1, characterized in that: One end of the hydraulic cylinder oil delivery pipe (6) is in communication with the hydraulic chamber of the hydraulic cylinder (1), and the other end is in communication with the active chamber of the hydraulic cylinder (1).

Images