Self-heat-dissipation hydraulic oil cylinder

Abstract

The utility model discloses a self heat dissipation type hydraulic oil cylinder, which relates to the technical field of hydraulic oil cylinders, and comprises a cylinder barrel and a piston rod sleeved in the cylinder barrel, one end of the piston rod far away from the cylinder barrel is connected with a hinge joint, the outer wall of the cylinder barrel is connected with an air box, and the inside of the air box is connected with a driven piston plate in a sliding mode. A driven rod is connected between the hinge joint and the driven piston, the driven rod is in sliding connection with the air box, an air outlet pipeline is arranged in the cylinder barrel and connected with the interior of the air box, and an air outlet extending out of the cylinder barrel is formed in the side, away from the air box, of the air outlet pipeline. The self-heat-dissipation hydraulic oil cylinder has the function of actively driving airflow to flow on the inner wall of the cylinder barrel, can actively dissipate heat of the cylinder barrel, does not need an external cooling device, can act along with stretching and retracting of the piston rod, and avoids energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and more specifically to a self-cooling hydraulic cylinder. Background Technology

[0002] During operation, hydraulic cylinders generate heat due to internal friction, compression, and leakage, causing the hydraulic oil temperature to rise. Excessive hydraulic oil temperature not only affects the normal operation of the hydraulic system and reduces system efficiency but may also shorten the lifespan of hydraulic components. Therefore, in some cases, to ensure the stability and reliability of the hydraulic system, a heat dissipation structure is installed on the hydraulic cylinder.

[0003] Chinese patent application number 202321392496.2 discloses a self-cooling hydraulic cylinder. The structure includes a cylinder barrel, a cylinder head, a cylinder bottom, and a piston rod. A layer of thermally conductive silicone grease is disposed on the outer side of the cylinder barrel, and a heat dissipation shell is fitted onto the outer side of the silicone grease layer. The heat dissipation shell has several sets of aluminum or copper heat dissipation fins. A flange is provided on the cylinder head, and a mounting hole is provided on the flange. An air-cooling device is detachably installed in the mounting hole. However, the above patent has the following problems in use:

[0004] 1. Although the outer wall of the cylinder of the hydraulic cylinder is equipped with a heat dissipation structure, it can only rely on the external airflow for passive heat dissipation and cannot actively dissipate heat, resulting in low cooling efficiency.

[0005] 2. Although the heat sink has air-cooling channels, it still needs to rely on external equipment for heat dissipation, which not only increases energy consumption, but also cannot adaptively adjust according to the usage of the hydraulic cylinder.

[0006] Therefore, it is necessary to propose a self-cooling hydraulic cylinder to solve the above problems. Utility Model Content

[0007] To address the above problems, this utility model provides a self-cooling hydraulic cylinder, which actively drives airflow, improving the heat dissipation capacity of the cylinder barrel. At the same time, it can cooperate with the heat dissipation fins to promote the flow of surrounding airflow.

[0008] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0009] A self-cooling hydraulic cylinder includes a cylinder barrel and a piston rod sleeved inside the cylinder barrel. A hinge joint is connected to the end of the piston rod away from the cylinder barrel. An air box is connected to the outer wall of the cylinder barrel. A driven piston plate is slidably connected inside the air box. A driven rod is connected between the hinge joint and the driven piston. The driven rod is slidably connected to the air box. An air outlet pipe is provided inside the cylinder barrel and connected to the inside of the air box. An air outlet port extending out of the cylinder barrel is provided on the side of the air outlet pipe away from the air box. A cover plate is connected to the side of the air box away from the cylinder barrel.

[0010] A first check valve is connected to the connection between the air box and the air outlet pipe, and a second check valve is connected to both ends of the cover plate.

[0011] Preferably, heat dissipation fins are connected to the outer wall of the cylinder, and the air passage of the air outlet pipe is located between two adjacent heat dissipation fins.

[0012] Preferably, the air outlet pipe is spiral-shaped, the heat dissipation fins are spiral-shaped, and the air inlet of the air outlet pipe is located at both ends of the air box.

[0013] Preferably, the exhaust pipe is arc-shaped, the exhaust pipes are arranged at equal intervals inside the cylinder, and the heat dissipation fins are disc-shaped.

[0014] Preferably, the two ends of the air outlet pipe extend out of the cylinder and are located on the side away from the air box.

[0015] Preferably, a support frame is connected to one end of the cylinder near the piston rod, and an annular brush is connected to the support frame, the annular brush contacting the outer wall of the driven rod.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This device has an exhaust pipe inside the cylinder. By cooperating with the air box on one side, it can actively drive the airflow to flow on the inner wall of the cylinder, which can actively dissipate heat from the cylinder. At the same time, it does not require an external cooling device and can move with the extension and retraction of the piston rod, thus avoiding energy consumption.

[0018] 2. This device has a heat dissipation fin structure between two adjacent air channels, which can cooperate with the airflow ejected from the air outlet pipe. The airflow from the air outlet pipe will accelerate the surrounding airflow, thereby improving the heat dissipation efficiency of the heat dissipation fins and having a dual heat dissipation function. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the first embodiment of this utility model;

[0020] Figure 2This is a cross-sectional view of the structure of the first embodiment of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the second embodiment of this utility model;

[0022] Figure 4 This is a cross-sectional view of the structure of the second embodiment of this utility model.

[0023] Figure label:

[0024] 101. Cylinder; 102. Piston rod; 103. Hinge joint; 104. Air box; 105. Driven piston plate; 106. Driven rod; 107. Exhaust pipe; 108. Cover plate; 109. First check valve; 110. Second check valve; 111. Heat dissipation fins; 112. Support frame; 113. Annular brush bristles. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4A self-cooling hydraulic cylinder includes a cylinder barrel 101 and a piston rod 102 sleeved inside the cylinder barrel 101. The piston rod 102 is slidably connected to the cylinder barrel 101, which is an existing structure and will not be described in detail here. A hinge joint 103 is connected to the end of the piston rod 102 away from the cylinder barrel 101. The hinge joint 103 is used for installation and connection with other devices. An air box 104 is connected to the outer wall of the cylinder barrel 101. A driven piston plate 105 is slidably connected inside the air box 104. The driven piston plate 105 is axially slidably connected to... Within the air chamber 104, the sliding direction is the same as the moving direction of the piston rod 102. The internal space of the air chamber 104 is divided into two parts by the driven piston plate 105. When the driven piston plate 105 moves back and forth within the air chamber 104, the volume of the space on both sides changes. At this time, under the action of the first one-way valve 109 and the second one-way valve 110, gas will enter the outlet pipe 107, which will drive the airflow in the outlet pipe 107 to flow, thereby cooling the cylinder 101. It can actively drive the airflow to flow. The hinge A driven rod 106 is connected between the connector 103 and the driven piston plate 105. The driven rod 106 is slidably connected to the air box 104 and extends out of the air box 104, where it slides against the outer wall of the air box 104. When the piston rod 102 moves, it drives the driven rod 106 to move through the hinge connector 103 at one end. The driven rod 106 drives the driven piston plate 105 to move within the air box 104. An exhaust pipe 107 is provided inside the cylinder 101 and is connected to the inside of the air box 104. When the driven piston... When the volume of one side of the piston plate 105 changes, airflow enters the outlet pipe 107. As the airflow flows through the outlet pipe 107, it exchanges heat with the cylinder 101, cooling the cylinder 101 before exiting from the outlet. The outlet pipe 107 has an outlet extending out of the cylinder 101 on the side away from the gas box 104. A cover plate 108 is connected to the side of the gas box 104 away from the cylinder 101 to seal the gas box 104. In another embodiment, the cover plate 108 is integrated with the gas box 104. It is important to note that the piston rod 102 slides axially within the cylinder 101. During use, rotation of the piston rod 102 should be avoided, as rotation within the cylinder 101 will accelerate wear on the internal sealing structure. Therefore, the driven rod 106, which slides within the gas box 104, also serves as a guide to prevent rotation.

[0027] When the driven piston plate 105 moves within the air box 104, air flows within the outlet pipe 107. A one-way pushing structure is required to allow the airflow to move in one direction. The following provides a structure for promoting one-way airflow: A first one-way valve 109 is connected at the connection between the air box 104 and the outlet pipe 107. The outlet of the first one-way valve 109 faces the outlet pipe 107 and is used to transport the gas in the air box 104 into the outlet pipe 107. A second one-way valve 110 is connected to both ends of the cover plate 108. The outlet of the second one-way valve 110 faces the air box 104. When the driven piston plate 105 moves within the air box 104, it will not affect the second one-way valves 110 located at both ends, allowing the second one-way valves 110 to perform normal suction action and draw airflow into the air box 104.

[0028] In another embodiment, the first one-way valve 109 and the second one-way valve 110 are arranged in opposite directions, and the outlet pipe 107 becomes the inlet end. When the volume inside the gas box 104 increases, gas will be drawn in through the outlet pipe 107. When the volume decreases, it will be discharged from the second one-way valve 110 on the cover plate 108. At this time, the original inlet end becomes the outlet end, and the original outlet end becomes the inlet end.

[0029] The exhaust pipe 107 can actively drive airflow for heat dissipation. However, the heat dissipation efficiency in the area between the two airflow pipes is not high. The following structure improves heat dissipation efficiency: Specifically, heat dissipation fins 111 are connected to the outer wall of the cylinder 101. The heat dissipation fins 111 protrude from the cylinder 101. When airflow passes over the heat dissipation fins 111, it exchanges heat with the fins, thus cooling the cylinder 101. The air passage of the exhaust pipe 107 is located between two adjacent heat dissipation fins 111, used to dissipate the temperature between the two air passages outward through the heat dissipation fins 111. Simultaneously, it can coordinate with the airflow ejected from the exhaust pipe 107, accelerating the surrounding airflow and thus improving the heat dissipation efficiency of the heat dissipation fins 111, providing a dual heat dissipation effect.

[0030] First embodiment: Specifically, refer to Figure 1 and Figure 2 The exhaust pipe 107 is spiral-shaped. When airflow flows within the exhaust pipe 107, the exhaust pipe 107 is spiral-shaped, and the exhaust port is located in the middle of the cylinder 101. The heat dissipation fins 111 are spiral-shaped. The air inlets of the exhaust pipe 107 are located at both ends of the air box 104. No matter how the driven piston plate 105 moves, it will not affect the air inlets of the exhaust pipe 107. When airflow enters the exhaust pipe 107, it will flow along the spiral-shaped air passage and then be discharged from the exhaust port in the middle. The spiral-shaped heat dissipation fins 111 are used to improve heat dissipation efficiency.

[0031] Second embodiment: Specifically, refer to Figure 3 and Figure 4 The exhaust pipe 107 is arc-shaped, specifically C-shaped, with exhaust ends at both ends. The exhaust port extends out of the cylinder 101 and is connected to the air box 104 in the middle. The exhaust pipes 107 are evenly spaced inside the cylinder 101. When the driven piston plate 105 moves in the air box 104, the internal space changes, and airflow is discharged from multiple exhaust pipes 107. All multiple exhaust pipes 107 can play the role of exhausting gas. The heat dissipation fins 111 are disc-shaped and located between two exhaust pipes 107, which can increase the heat dissipation capacity. The discharged airflow can also increase the airflow between the two heat dissipation fins 111.

[0032] The two ends of the air outlet pipe 107 extend out of the cylinder 101 and are located on the side away from the air box 104. The air outlets are located at both ends. After the airflow enters the air outlet pipe 107, it can flow from both sides.

[0033] During use, dust and other contaminants may adhere to the driven rod 106, causing wear at the connection between the driven rod 106 and the air box 104. The following provides a structure for cleaning the outer wall of the driven rod 106: Specifically, refer to... Figure 2 The cylinder 101 is connected to a support frame 112 near the piston rod 102. The support frame 112 is fixedly connected to the cylinder 101. The support frame 112 is connected to an annular brush 113. The annular brush 113 contacts the outer wall of the driven rod 106. When the driven rod 106 moves, the annular brush 113 brushes off the impurities on the outer wall of the driven rod 106, thus achieving a cleaning effect.

[0034] In use, the piston rod 102 drives the driven rod 106 to move axially through the hinge joint 103. The driven rod 106 drives the driven piston plate 105 located in the air box 104 to move. When the driven piston plate 105 moves in the air box 104, it causes the volume of space on both sides to change. The external airflow enters the air box 104 through the second one-way valve 110 and is discharged through the exhaust pipe 107. The exhaust pipe 107 and the heat dissipation fins 111 on the outer wall play a dual role in cooling the cylinder 101.

[0035] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A self-cooling hydraulic cylinder, comprising a cylinder barrel (101) and a piston rod (102) sleeved within the cylinder barrel (101), wherein a hinge joint (103) is connected to one end of the piston rod (102) away from the cylinder barrel (101), characterized in that: A gas box (104) is connected to the outer wall of the cylinder (101). A driven piston plate (105) is slidably connected inside the gas box (104). A driven rod (106) is connected between the hinge joint (103) and the driven piston plate (105). The driven rod (106) is slidably connected to the gas box (104). An exhaust pipe (107) is provided inside the cylinder (101). The exhaust pipe (107) is connected to the inside of the gas box (104). An exhaust port extending out of the cylinder (101) is provided on the side of the exhaust pipe (107) away from the gas box (104). A cover plate (108) is connected to the side of the gas box (104) away from the cylinder (101). A first check valve (109) is connected at the connection between the air box (104) and the air outlet pipe (107), and a second check valve (110) is connected to both ends of the cover plate (108).

2. The self-cooling hydraulic cylinder according to claim 1, characterized in that: The cylinder (101) has heat dissipation fins (111) connected to its outer wall, and the air passage of the air outlet pipe (107) is located between two adjacent heat dissipation fins (111).

3. A self-cooling hydraulic cylinder according to claim 2, characterized in that: The exhaust pipe (107) is spiral-shaped, the heat dissipation fins (111) are spiral-shaped, and the air inlet of the exhaust pipe (107) is located at both ends of the air box (104).

4. A self-cooling hydraulic cylinder according to claim 2, characterized in that: The exhaust pipe (107) is arc-shaped and is arranged at equal intervals inside the cylinder (101). The heat dissipation fins (111) are disc-shaped.

5. A self-cooling hydraulic cylinder according to claim 4, characterized in that: The two ends of the air outlet pipe (107) extend out of the cylinder (101) and are located on the side away from the air box (104).

6. A self-cooling hydraulic cylinder according to claim 1, characterized in that: The cylinder (101) is connected to a support frame (112) at one end near the piston rod (102). An annular brush (113) is connected to the support frame (112), and the annular brush (113) is in contact with the outer wall of the driven rod (106).

Images