Oil cylinder for engineering machinery

Abstract

The utility model provides an oil cylinder for engineering machinery, which relates to the technical field of oil cylinders and comprises a cylinder body, a piston rod is slidably connected to the inner wall of the cylinder body, a cooling device is arranged on the surface of the cylinder body and comprises a cooling box, and the inner wall of the cooling box is slidably connected with the arc surface of the piston rod. The hydraulic oil cylinder comprises a cylinder body, a cooling box is arranged in the cylinder body, a heat conduction ring is fixedly connected to the inner wall of the cooling box, the heat conduction ring is a copper ring, two fixing plates are fixedly connected to the arc face of the cooling box, bolts are inserted into the surfaces of the two fixing plates in a penetrating mode, and the bolts are in threaded connection with the arc face of the cylinder body. Heat generated by operation of the piston rod can be better dissipated, the stable use temperature of the piston rod is guaranteed, the situation that the piston rod is excessively heated due to friction, deformation and damage of the conductive body cause abnormal operation of the oil cylinder is avoided, and the use effect and high-efficiency transmission of the hydraulic oil cylinder are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil cylinders, in particular to an oil cylinder for engineering machinery. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion); it consists of a cylinder barrel, a piston, a piston rod, and a sealing device.

[0003] When traditional hydraulic cylinders are used on construction machinery, the piston rod drives the piston to slide back and forth on the inner wall of the cylinder, thereby completing linear reciprocating motion and converting hydraulic energy into mechanical energy of reciprocating linear motion. However, in actual use, it is found that when the piston rod slides back and forth on the inner wall of the cylinder, rapid friction and sliding will occur between the two, causing high temperature heat to be generated on the surface of the piston rod. When the cylinder runs for too long, the piston rod will cause itself to deform and be damaged due to the presence of high temperature, affecting the normal use of the cylinder and reducing the efficient transmission of energy. Utility Model Content

[0004] The utility model proposes an oil cylinder for engineering machinery to solve the problem that when the piston rod slides back and forth linearly on the inner wall of the cylinder, rapid friction and sliding will occur between the two, causing high temperature heat to be generated on the surface of the piston rod. When the oil cylinder runs for too long, the piston rod will cause itself to be deformed and damaged due to the existence of high temperature, affecting the normal use of the oil cylinder and reducing the efficient transmission efficiency of energy.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an oil cylinder for engineering machinery, comprising a cylinder body, the inner wall of the cylinder body is slidably connected to the piston rod, and the surface of the cylinder body is provided with a cooling device, wherein the cooling device comprises a cooling box, the inner wall of the cooling box is slidably connected to the arc surface of the piston rod, the inner wall of the cooling box is fixedly connected to a heat conducting ring, the heat conducting ring is a copper ring, the arc surface of the cooling box is fixedly connected to two fixing plates, the surfaces of the two fixing plates are penetrated and inserted with bolts, the bolts are threadedly connected to the arc surface of the cylinder body, the arc surface of the cooling box is fixedly connected to an output pipe, the surface of the cylinder body is fixedly connected to a water pump, the output end of the water pump is fixedly connected to the output pipe, the input end of the water pump is fixedly connected to a connecting pipe, the other end of the connecting pipe is connected to a liquid nitrogen tank, the liquid nitrogen tank is fixedly connected to the surface of the cylinder body, the side of the liquid nitrogen tank away from the connecting pipe is fixedly connected to an input pipe, and one end of the input pipe is fixedly connected to the surface of the cooling box.

[0006] The effect achieved by the above components is that when the hydraulic cylinder of the construction machinery is in use, it can better dissipate the heat generated by the operation of the piston rod, ensuring the stable operating temperature of the piston rod, and not easily causing the piston rod to be deformed and damaged due to excessive friction and heat, resulting in abnormal operation of the cylinder, and further improving the use effect and high-efficiency transmission of the hydraulic cylinder.

[0007] Preferably, a sealing ring is fixedly connected to one side surface of the cooling box, and the sealing ring is a rubber ring.

[0008] The effect achieved by the above components is: through the setting of the sealing ring, a gap is created between the piston rod and the cooling box, so that the cold air generated by the liquid nitrogen is not easy to leak, thereby better cooling and dissipating the heat of the piston rod.

[0009] Preferably, protective sleeves are fixedly connected to the arc surfaces of the input pipe, the output pipe and the connecting pipe, and the protective sleeves are polyurethane foam sleeves.

[0010] The effect achieved by the above components is that by adding the jacket, the low temperature of the liquid nitrogen is not easily lost when it flows in the pipeline, so that it can be better input into the cooling box, thereby better improving the cooling efficiency.

[0011] Preferably, an operating block is fixedly connected to the surface of the bolt, and a plurality of protective protrusions are provided on the surface of the operating block.

[0012] The effects achieved by the above components are: through the setting of the operating block, the bolts can be rotated faster and more stably, and the cooling box can be fixed more quickly, thereby improving the convenience of using the cooling device.

[0013] Preferably, a connecting rope is fixedly connected to the surface of the bolt, and the other end of the connecting rope is fixedly connected to the surface of the fixing plate.

[0014] The effect achieved by the above components is: through the setting of the connecting rope, the bolts are more convenient to take during use, thereby making the assembly and disassembly of the cooling box more convenient, and also making it less likely for the bolts to fall and be lost during use.

[0015] Preferably, a support device is provided on the surface of the piston rod, and the support device includes three sliding rods, which are respectively fixedly connected to the arc surface of the piston rod, and three stabilizing plates are fixedly connected to the arc surface of the cylinder body. Slide blocks are respectively provided on the surfaces of the three stabilizing plates, and the three sliding rods are respectively slidably connected to the inner walls of the sliding holes on the surfaces of the three stabilizing plates.

[0016] The effect achieved by the above components is: when the piston rod of the hydraulic cylinder is in operation, the piston rod will repeatedly pull and pull on the inner wall of the cylinder body, which will drive the sliding rod fixed on its surface to slide, so that the sliding rod slides on the inner wall of the sliding hole of the stabilizing plate fixed on the surface of the cylinder body. At this time, the piston rod will be more stable and will not be easily deformed and damaged due to excessive load of the driven object, thereby further improving the protection effect of the piston rod.

[0017] Preferably, one end of the three sliding rods is respectively fixedly connected with a stopper, and the regular size of the stopper is slightly larger than the size of the sliding hole.

[0018] The effect achieved by the above components is: through the setting of the stop block, the sliding rod can slide stably on the inner wall of the sliding hole of the stabilizing plate, and is not easily detached due to excessive sliding, thereby ensuring the normal use of the support device.

[0019] Preferably, a reinforcement ring is fixedly connected to the arc surface of the piston rod, and the reinforcement ring is fixedly connected to the surfaces of the three sliding rods respectively.

[0020] The effect achieved by the above components is: through the setting of the reinforcement ring, the three slide rods on the piston rod can form a certain connection relationship, thereby further improving the strength of the slide rod and better supporting the piston rod.

[0021] In summary, the beneficial effects of the present invention are as follows:

[0022] When the hydraulic cylinder of construction machinery is in use, it can better dissipate the heat generated by the operation of the piston rod, ensuring the stable operating temperature of the piston rod. It is not easy for the piston rod to be deformed and damaged due to excessive friction and heat, resulting in abnormal operation of the cylinder. It also further improves the use effect and high-efficiency transmission of the hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the cooling device of the utility model;

[0025] Figure 3 For this utility model Figure 2 A schematic diagram of the side three-dimensional structure of ;

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the support device of the utility model.

[0027] Legend: 1. Cylinder body; 2. Piston rod; 3. Cooling device; 31. Cooling box; 32. Heat conduction ring; 33. Fixing plate; 34. Bolt; 35. Output pipe; 36. Water pump; 37. Connecting pipe; 38. Liquid nitrogen tank; 39. Input pipe; 310. Sealing ring; 311. Protective sleeve; 312. Operating block; 313. Connecting rope; 4. Support device; 41. Slide rod; 42. Stabilizing plate; 43. Slide hole; 44. Stop block; 45. Reinforcement ring. DETAILED DESCRIPTION

[0028] Reference Figure 1 As shown, this embodiment discloses an oil cylinder for engineering machinery, including a cylinder body 1, an inner wall of the cylinder body 1 is slidably connected to a piston rod 2, a surface of the cylinder body 1 is provided with a cooling device 3, and a surface of the piston rod 2 is provided with a supporting device 4.

[0029] Reference Figure 1 and Figure 2 as well as Figure 3As shown, this embodiment discloses a cooling device 3 including a cooling box 31, the inner wall of the cooling box 31 is slidably connected to the arc surface of the piston rod 2, the inner wall of the cooling box 31 is fixedly connected to a heat conducting ring 32, the heat conducting ring 32 is a copper ring, and two fixing plates 33 are fixedly connected to the arc surface of the cooling box 31, and bolts 34 are inserted through the surfaces of the two fixing plates 33, and the bolts 34 are threadedly connected to the arc surface of the cylinder body 1, and an output pipe 35 is fixedly connected to the arc surface of the cooling box 31, and the surface of the cylinder body 1 is fixedly connected to the output pipe 35. A water pump 36 is connected, the output end of the water pump 36 is fixedly connected to the output pipe 35, the input end of the water pump 36 is fixedly connected to the connecting pipe 37, the other end of the connecting pipe 37 is connected to the liquid nitrogen tank 38, the liquid nitrogen tank 38 is fixedly connected to the surface of the cylinder body 1, the side of the liquid nitrogen tank 38 away from the connecting pipe 37 is fixedly connected to the input pipe 39, one end of the input pipe 39 is fixedly connected to the surface of the cooling box 31. When the hydraulic cylinder is assembled on the engineering machinery and used, the piston rod 2 will slide back and forth in the inner wall of the cylinder body 1 At the same time, when the piston rod 2 moves, it will repeatedly slide and rub against the inner wall of the cylinder body 1, thereby generating high-temperature heat, starting the water pump 36 on the cylinder body 1. The start of the water pump 36 will drive the liquid nitrogen in the liquid nitrogen tank 38 into the connecting pipe 37, and then enter the water pump 36 through the connecting pipe 37, and then be transported into the output pipe 35 through the water pump 36, and enter the cooling box 31 from the output pipe 35, and then through the heat conduction effect of the heat conducting ring 32, the low-temperature cold gas of the liquid nitrogen is transmitted to the surface of the piston rod 2. At this time, the cold gas will dissipate the piston rod 2 and reduce its temperature, and then the liquid nitrogen will return to the liquid nitrogen tank 38 from the input pipe 39, so that the liquid nitrogen flows back and forth continuously. At this time, when the hydraulic cylinder of the engineering machinery is in use, it can better dissipate the heat generated by the operation of the piston rod 2, ensuring the stable operating temperature of the piston rod 2, and is not easy to cause the piston rod 2 to be deformed and damaged due to excessive friction heating of the conductive body, resulting in abnormal operation of the cylinder, and further improving the use effect and high-efficiency transmission of the hydraulic cylinder.

[0030] Reference Figure 1 and Figure 2 as well as Figure 3 As shown, this embodiment discloses that a sealing ring 310 is fixedly connected to one side surface of the cooling box 31. The sealing ring 310 is a rubber ring. Through the setting of the sealing ring 310, a gap is generated between the piston rod 2 and the cooling box 31, so that the cold air generated by the liquid nitrogen is not likely to leak, thereby better cooling and dissipating the heat of the piston rod 2. The arc surfaces of the input pipe 39, the output pipe 35 and the connecting pipe 37 are respectively fixedly connected with a protective sleeve 311. The protective sleeve 311 is a polyurethane foam sleeve. Through the setting of the protective sleeve 311, when the liquid nitrogen flows in the pipeline, the low temperature of the liquid nitrogen is not likely to be lost, thereby better input into the cooling box 31, and better improving the cooling efficiency.

[0031] Reference Figure 1 and Figure 2 as well as Figure 3 As shown, this embodiment discloses that the surface of the bolt 34 is fixedly connected with an operating block 312, and the surface of the operating block 312 is provided with a number of protective protrusions. Through the provision of the operating block 312, the bolt 34 can be rotated more quickly and stably, and the cooling box 31 can be fixed more quickly, thereby improving the convenience of using the cooling device 3. The surface of the bolt 34 is fixedly connected with a connecting rope 313, and the other end of the connecting rope 313 is fixedly connected to the surface of the fixing plate 33. Through the provision of the connecting rope 313, the bolt 34 is more convenient to pick up when in use, thereby making the assembly and disassembly of the cooling box 31 more convenient, and making the bolt 34 less likely to fall off and be lost during use.

[0032] Reference Figure 1 and Figure 4 As shown, this embodiment discloses that the support device 4 includes three sliding rods 41, and the three sliding rods 41 are respectively fixedly connected to the arc surface of the piston rod 2, and three stabilizing plates 42 are fixedly connected to the arc surface of the cylinder body 1. Slide blocks are respectively provided on the surfaces of the three stabilizing plates 42, and the three sliding rods 41 are respectively slidably connected to the inner walls of the sliding holes 43 on the surfaces of the three stabilizing plates 42. When the piston rod 2 of the hydraulic cylinder is in operation, the piston rod 2 will repeatedly pull and pull on the inner wall of the cylinder body 1, which will drive the sliding rods 41 fixedly connected on its surface to slide, so that the sliding rods 41 slide on the inner walls of the sliding holes 43 fixedly connected to the stabilizing plates 42 on the surface of the cylinder body 1. At this time, the piston rod 2 will be more stable and will not easily be deformed and damaged due to excessive load of the driven object, thereby further improving the protection effect of the piston rod 2.

[0033] Reference Figure 1 and Figure 4 As shown, this embodiment discloses that one end of the three sliding rods 41 is respectively fixedly connected with a stopper 44, and the regular size of the stopper 44 is slightly larger than the size of the sliding hole 43. Through the setting of the stopper 44, the sliding rod 41 can stably slide on the inner wall of the sliding hole 43 of the stabilizing plate 42, and is not easily separated due to excessive sliding, thereby ensuring the normal use of the support device 4. A reinforcement ring 45 is fixedly connected to the arc surface of the piston rod 2, and the reinforcement ring 45 is respectively fixedly connected to the surfaces of the three sliding rods 41. Through the setting of the reinforcement ring 45, the three sliding rods 41 on the piston rod 2 can form a certain connection relationship, thereby further improving the strength of the sliding rod 41, and can better support the piston rod 2.

[0034] Working principle: When the hydraulic cylinder is assembled on engineering machinery and used, the piston rod 2 will slide back and forth in the inner wall of the cylinder body 1. At the same time, when the piston rod 2 moves, it will repeatedly slide and rub against the inner wall of the cylinder body 1, thereby generating high-temperature heat, starting the water pump 36 on the cylinder body 1. The start of the water pump 36 will drive the liquid nitrogen in the liquid nitrogen tank 38 into the connecting pipe 37, and then enter the water pump 36 through the connecting pipe 37, and then be transported into the output pipe 35 through the water pump 36, and then enter the cooling box 31 from the output pipe 35, and then pass through the heat conduction ring 32 to conduct heat. The effect is that the low-temperature cold air of the liquid nitrogen is transmitted to the surface of the piston rod 2. At this time, the cold air will dissipate the heat of the piston rod 2 and reduce the temperature of the piston rod 2, and then the liquid nitrogen will return to the liquid nitrogen tank 38 from the input pipe 39, so that the liquid nitrogen will flow back and forth continuously. At this time, when the hydraulic cylinder of the engineering machinery is in use, it can better dissipate the heat generated by the operation of the piston rod 2, ensuring the stable operating temperature of the piston rod 2, and not easily causing the piston rod 2 to be deformed and damaged due to excessive friction and heating of the conductive body, resulting in abnormal operation of the cylinder, and further improving the use effect and high-efficiency transmission of the hydraulic cylinder.

[0035] When the piston rod 2 of the hydraulic cylinder is in operation, the piston rod 2 will be repeatedly pulled and pulled on the inner wall of the cylinder body 1, which will drive the sliding rod 41 fixedly connected on its surface to slide, so that the sliding rod 41 slides on the inner wall of the sliding hole 43 fixedly connected to the stabilizing plate 42 on the surface of the cylinder body 1. At this time, the piston rod 2 will be more stable and will not be easily deformed and damaged due to excessive load of the driven object, thereby further improving the protection effect of the piston rod 2.

Claims

1. An oil cylinder for engineering machinery, comprising a cylinder body (1), characterized in that: The inner wall of the cylinder (1) is slidably connected to the piston rod (2), and a cooling device (3) is provided on the surface of the cylinder (1). The cooling device (3) includes a cooling box (31), and the inner wall of the cooling box (31) is slidably connected to the arc surface of the piston rod (2). The inner wall of the cooling box (31) is fixedly connected to a heat conducting ring (32), and the heat conducting ring (32) is a copper ring. Two fixing plates (33) are fixedly connected to the arc surface of the cooling box (31), and bolts (34) are inserted through the surfaces of the two fixing plates (33). The bolts (34) are threadedly connected to the arc surface of the cylinder (1). An output pipe (35) is fixedly connected to the arc surface of the cooling box (31), a water pump (36) is fixedly connected to the surface of the cylinder body (1), the output end of the water pump (36) is fixedly connected to the output pipe (35), the input end of the water pump (36) is fixedly connected to a connecting pipe (37), the other end of the connecting pipe (37) is connected to a liquid nitrogen tank (38), the liquid nitrogen tank (38) is fixedly connected to the surface of the cylinder body (1), and an input pipe (39) is fixedly connected to the side of the liquid nitrogen tank (38) away from the connecting pipe (37), and one end of the input pipe (39) is fixedly connected to the surface of the cooling box (31).

2. The oil cylinder for construction machinery according to claim 1, characterized in that: A sealing ring (310) is fixedly connected to one side surface of the cooling box (31), and the sealing ring (310) is a rubber ring.

3. The oil cylinder for construction machinery according to claim 1, characterized in that: The arc surfaces of the input pipe (39), the output pipe (35) and the connecting pipe (37) are respectively fixedly connected with a protective sleeve (311), and the protective sleeve (311) is a polyurethane foam sleeve.

4. The oil cylinder for construction machinery according to claim 1, characterized in that: An operating block (312) is fixedly connected to the surface of the bolt (34), and a plurality of protective protrusions are provided on the surface of the operating block (312).

5. The oil cylinder for construction machinery according to claim 1, characterized in that: A connecting rope (313) is fixedly connected to the surface of the bolt (34), and the other end of the connecting rope (313) is fixedly connected to the surface of the fixing plate (33).

6. The oil cylinder for construction machinery according to claim 1, characterized in that: The surface of the piston rod (2) is provided with a support device (4), and the support device (4) includes three slide rods (41), and the three slide rods (41) are respectively fixedly connected to the arc surface of the piston rod (2); three stabilizing plates (42) are fixedly connected to the arc surface of the cylinder body (1), and the surfaces of the three stabilizing plates (42) are respectively provided with sliders, and the three slide rods (41) are respectively slidably connected to the inner walls of the sliding holes (43) on the surfaces of the three stabilizing plates (42).

7. The oil cylinder for construction machinery according to claim 6, characterized in that: One end of the three slide bars (41) is respectively fixedly connected with a stopper (44), and the size of the stopper (44) is slightly larger than the size of the slide hole (43).

8. The oil cylinder for construction machinery according to claim 6, characterized in that: A reinforcement ring (45) is fixedly connected to the arc surface of the piston rod (2), and the reinforcement ring (45) is fixedly connected to the surfaces of the three sliding rods (41) respectively.

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