A cooling device for ball screws in an electronic load fatigue testing machine.

Abstract

This utility model discloses a cooling device for a ball screw in an electronic load fatigue testing machine, including a rotating shaft of the testing machine. A ball screw is located at the middle position of the rotating shaft. A nut is threaded onto the outer surface of the ball screw. A mounting bracket is fixedly connected to the upper surface of the nut. Connecting rings are fixedly connected to both ends of the nut. The connecting rings are sleeved on the two end surfaces of the ball screw. Cooling cylinders are slidably sleeved on the two end surfaces of the rotating shaft of the testing machine. A fixed flange is provided at one end of the cooling cylinder. The fixed flange is fixedly installed on one side surface of the connecting ring by screws. A sealing ring is fixedly connected to the end face of the fixed flange and pressed tightly onto the surface of the connecting ring. An clearance hole is provided at the other end of the cooling cylinder. A sealing ring is fixedly connected to the inner side of the clearance hole. Oil can be circulated for cooling and protection, improving heat exchange and cooling effect, facilitating protection, and ensuring safety and stability.

Description

Technical Field

[0001] This utility model relates to the field of ball screw cooling, and more specifically, to a cooling device for a ball screw in an electronic load fatigue testing machine. Background Technology

[0002] The actuator of the electronic fatigue testing machine uses a ball screw pair as the power loading rod. The ball screw of the ball screw pair contacts the nut through the balls. The contact surface is a point contact, with a small contact area and a large unit pressure, thus limiting the load-bearing capacity. In electronic fatigue testing, the ball screw needs to work in both forward and reverse directions at high frequency. Friction causes the screw, balls, and nut to heat up. As the working time increases, the heat generation increases. As these three parts heat up, the fit accuracy decreases, thus affecting the motion accuracy of the screw pair. Therefore, heat dissipation and cooling are required for this part.

[0003] Application CN 217301480 U discloses a ball screw assembly and cooling system, including a ball screw and a ball nut. The ball nut is threaded onto the outside of the ball screw and includes a nut body and a cooling oil chamber shell. The nut body is threaded to the ball screw, and an annular portion protrudes outward from the circumference of the nut body. A stepped surface is provided at the connection between the annular portion and the nut body. The cooling oil chamber shell is fitted into one end of the nut body, and one end of the cooling oil chamber shell is threaded to the stepped surface. A hollow cooling oil chamber is formed between the cooling oil chamber shell and the nut body. An oil inlet and an oil return pipe interface communicating with the cooling oil chamber are provided on the annular portion. This application sets the ball nut of the ball screw assembly as a nut body and a cooling oil chamber shell, forming a cooling oil chamber between the nut body and the cooling oil chamber shell, thereby allowing cooling oil to flow through the cooling oil chamber inside the ball nut and achieving cooling of the ball nut.

[0004] In the above-disclosed structure, the cooling cylinder is directly installed on the surface of the lead screw, which cannot achieve a stable seal with the threaded position on the surface of the lead screw, making it prone to leakage. In addition, there is no circulation pipe for installing the cooling cylinder to combine the hose and the cooling box, which cannot achieve stable circulation cooling, affecting the cooling and protection effect, and has poor adaptability, which needs to be improved. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a cooling device for the ball screw in an electronic load fatigue testing machine. The ball screw is installed in the middle of the rotating shaft of the testing machine, thereby installing a nut and mounting bracket. It can be driven by the thread for reciprocating movement testing. Connecting cylinders are installed at both ends, combined with sealing rings and sealing collars at both ends, allowing for separate installation and positioning to ensure sealing stability and prevent leakage. Simultaneously, a circulating pipe connects the hose and cooling box, enabling circulating oil supply for cooling and protection, improving heat exchange and cooling efficiency, facilitating protection, and ensuring safety and stability.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A cooling device for a ball screw in an electronic fatigue testing machine includes a rotating shaft of the testing machine. A ball screw is located at the middle of the rotating shaft. A nut is threaded onto the outer surface of the ball screw. A mounting bracket is fixedly connected to the upper surface of the nut. Connecting rings are fixedly connected to both ends of the nut. The connecting rings are sleeved on the two end surfaces of the ball screw. Cooling cylinders are slidably fitted onto the two end surfaces of the rotating shaft. A fixed flange is provided at one end of the cooling cylinder. The fixed flange is fixedly installed on one side surface of the connecting ring by screws. A sealing ring is fixedly connected to the end face of the fixed flange. The sealing ring is pressed tightly onto the surface of the connecting ring. An clearance hole is provided at the other end of the cooling cylinder. A sealing ring is fixedly connected to the inner side of the clearance hole. The sealing ring is slidably connected to the outer surface of the rotating shaft. A circulation pipe and a combined pipe are respectively connected to both ends of the lower surface of the cooling cylinder. A threaded cap is threaded onto the surface of the combined pipe. A connecting pipe is rotatably installed at one end of the threaded cap. A cooling box is fixedly connected to one end of the circulation pipe through a flexible hose.

[0008] Furthermore, a circulation pump is fixedly connected to one end of the cooling box, and the circulation pump is fixedly connected to one end of the hose.

[0009] Furthermore, there are two cooling cylinders, which are symmetrically connected to the two ends of the rotating shaft of the testing machine.

[0010] Furthermore, the cooling cylinders are located at the upper end of the cooling box and are respectively connected to both sides of the nut. By installing the circulation pump through the cooling box and symmetrically installing the cooling cylinders, they can be assembled and positioned from both ends, which facilitates circulation cooling, is stable and efficient, and is easy to use.

[0011] Furthermore, a heat exchange plate is fixedly installed at one end of the cooling box, and a cooling fan is fixedly connected to one side surface of the heat exchange plate.

[0012] Furthermore, a heat exchange tube is fixedly connected inside the heat exchange plate, and the heat exchange tube is fixedly connected inside the cooling box.

[0013] Furthermore, the heat exchange tube is a hollow tube, and its end is located at the other end of the cooling box. The cooling fan and the heat exchange tube are connected by a heat exchange plate installed in the cooling box. This allows for direct ventilation and cooling, as well as indirect heat exchange with the cooling oil, preventing leakage, ensuring safety and stability, facilitating combination use, and providing high adaptability.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] (1) This scheme sets a lead screw in the middle of the rotating shaft of the testing machine to install nuts and mounting brackets. It can be driven by threads to perform reciprocating movement tests. The connecting cylinders are installed at both ends. Combined with the sealing rings and sealing rings at both ends, it can be installed separately to ensure sealing stability and avoid leakage. At the same time, the hose and cooling box are installed through the circulation pipe. Oil can be circulated for cooling protection, improving the heat exchange and cooling effect, which is beneficial for protection and safe and stable.

[0016] (2) By installing a circulating pump in the cooling box and symmetrically installing cooling cylinders, it can be assembled and positioned from both ends, which facilitates circulating cooling, is stable and efficient, and is easy to use.

[0017] (3) Heat exchange plates are installed in the cooling box to connect the cooling fan and heat exchange tubes. Direct ventilation and cooling are possible, and indirect heat exchange with cooling oil is possible. This avoids leakage, ensures safety and stability, facilitates combination and use, and has high adaptability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the planar structure of the present invention;

[0020] Figure 3 This is a cross-sectional schematic diagram of the cooling cylinder of this utility model;

[0021] Figure 4 This is a partial structural diagram of the cooling cylinder connection of this utility model;

[0022] Figure 5 This is a schematic diagram of the connection between the heat exchange tube and the heat exchange plate of this utility model.

[0023] Explanation of the labels in the diagram:

[0024] 1. Testing machine rotating shaft, 11. Lead screw, 12. Nut, 13. Mounting bracket, 14. Connecting ring, 15. Cooling cylinder, 16. Fixing flange, 17. Screw, 18. Sealing ring, 2. Clearance hole, 21. Sealing ring, 22. Circulation pipe, 23. Combination pipe, 24. Threaded cap, 25. Connecting pipe, 26. Hose, 27. Circulation pump, 28. Cooling box, 3. Heat exchange plate, 31. Cooling fan, 32. Heat exchange tube. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1 , Figure 3 and Figure 4 A cooling device for a ball screw in an electronic fatigue testing machine includes a rotating shaft 1 of the testing machine. A ball screw 11 is located at the middle of the rotating shaft 1. A nut 12 is threaded onto the outer surface of the ball screw 11. A mounting bracket 13 is fixedly connected to the upper surface of the nut 12, allowing the mounting of corresponding components. The rotating shaft 1 of the testing machine is driven to rotate reciprocally, which in turn drives the nut 12 to move reciprocally, thus performing the testing operation stably and efficiently. Connecting rings 14 are fixedly connected to both ends of the nut 12, and the connecting rings 14 are sleeved on both ends of the ball screw 11. Cooling cylinders 15 are slidably sleeved on both ends of the rotating shaft 1. A fixing flange 16 is provided at one end of the cooling cylinder 15. The fixing flange 16 is fixedly installed on one side of the connecting ring 14 by screws 17. A sealing ring 18 is fixedly connected to the end face of the fixing flange 16, and the sealing ring 18 is pressed tightly onto the surface of the connecting ring 14. The fixing flange 16 is installed separately and fixed, and the sealing ring 18 is used for pressing and sealing, improving the sealing of the connection position. To ensure safety and stability, the cooling cylinder 15 has an avoidance hole 2 at one end, with a sealing ring 21 fixedly connected to the inner side of the avoidance hole 2. The sealing ring 21 is slidably connected to the outer surface of the rotating shaft 1 of the testing machine. The lower surface of the cooling cylinder 15 is connected to a circulation pipe 22 and a combination pipe 23 at both ends. The surface of the combination pipe 23 is threaded with a threaded cap 24, and a connecting pipe 25 is rotatably installed at one end of the threaded cap 24. One end of the circulation pipe 22 is fixedly connected to a cooling box 28 through a hose 26. Cooling oil is stored in the cooling box 28 and can circulate into the interior of the cooling cylinder 15, thereby entering the interior of the nut 12 and the surface of the lead screw 11. It can circulate and remove heat for cooling and protection. When the nut 12 is moved and adjusted, the cooling cylinders 15 installed on both sides slide on the surface of the rotating shaft 1 of the testing machine, and the smooth surface provides auxiliary sealing, improving stability and preventing leakage. It is easy to install and use, highly adaptable, and the combination pipe 23 at the bottom can be connected to the connecting pipe 25 to ensure the stability of the connection on both sides and facilitate combination use.

[0027] Please see Figure 1 and Figure 2 A circulation pump 27 is fixedly connected to one end of the cooling box 28. The circulation pump 27 is fixedly connected to one end of the hose 26. There are two cooling cylinders 15, which are symmetrically connected to the two ends of the rotating shaft 1 of the testing machine. The cooling cylinders 15 are located at the upper end of the cooling box 28 and are respectively connected to the two sides of the nut 12. By installing the circulation pump in the cooling box and symmetrically installing the cooling cylinders, they can be assembled and positioned from both ends, which is convenient for circulation cooling, stable and efficient, and easy to use.

[0028] Please see Figure 1 , Figure 2and Figure 5 A heat exchange plate 3 is fixedly installed at one end of the cooling box 28. A cooling fan 31 is fixedly connected to one side surface of the heat exchange plate 3. A heat exchange tube 32 is fixedly connected inside the heat exchange plate 3. The heat exchange tube 32 is a hollow tube, and its end is located outside the other end of the cooling box 28. By installing the heat exchange plate through the cooling box, the cooling fan and the heat exchange tube are connected, which can directly ventilate and cool, and can indirectly exchange heat with the cooling oil to avoid leakage, ensure safety and stability, facilitate combination use, and have high adaptability. By blowing air through the cooling fan 31, cold air can be blown into the interior of the heat exchange tube 32. After passing through the surface of the heat exchange tube 32, it comes into contact with the cooling oil inside the cooling box 28, which can indirectly exchange heat for cooling and protection without contacting the cooling oil, thus avoiding leakage and pollution. It is safe and stable, facilitates combination use, effectively improves the cooling effect, and improves the safety of circulation protection.

[0029] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A cooling device for a ball screw in an electronic load fatigue testing machine, comprising a rotating shaft (1) of the testing machine, wherein a screw (11) is provided at the middle position of the rotating shaft (1), a nut (12) is threaded onto the outer surface of the screw (11), and a mounting bracket (13) is fixedly connected to the upper surface of the nut (12), characterized in that: Connecting rings (14) are fixedly connected to both ends of the nut (12). The connecting rings (14) are sleeved on both ends of the lead screw (11). Cooling cylinders (15) are slidably sleeved on both ends of the rotating shaft (1) of the testing machine. A fixed flange (16) is provided at one end of the cooling cylinder (15). The fixed flange (16) is fixedly installed on one side of the connecting ring (14) by screws (17). A sealing ring (18) is fixedly connected to the end face of the fixed flange (16). The sealing ring (18) is pressed tightly against the surface of the connecting ring (14). The other end of the cooling cylinder (15) is provided with a clearance hole (2). A sealing ring (21) is fixedly connected to the inner side of the clearance hole (2). The sealing ring (21) is slidably connected to the outer surface of the rotating shaft (1) of the testing machine. A circulation pipe (22) and a combination pipe (23) are respectively connected to the two ends of the lower surface of the cooling cylinder (15). A threaded cap (24) is threaded on the surface of the combination pipe (23). A connecting pipe (25) is rotatably installed at one end of the threaded cap (24). A cooling box (28) is fixedly connected to one end of the circulation pipe (22) through a hose (26).

2. The cooling device for the ball screw in an electronic load fatigue testing machine according to claim 1, characterized in that: A circulation pump (27) is fixedly connected to one end of the cooling box (28), and the circulation pump (27) is fixedly connected to one end of the hose (26).

3. The cooling device for the ball screw in an electronic load fatigue testing machine according to claim 1, characterized in that: There are two cooling cylinders (15), which are symmetrically connected to the two ends of the rotating shaft (1) of the testing machine.

4. The cooling device for the ball screw in an electronic load fatigue testing machine according to claim 1, characterized in that: The cooling cylinder (15) is located at the upper end of the cooling box (28) and is connected to both sides of the nut (12).

5. The cooling device for the ball screw in an electronic load fatigue testing machine according to claim 1, characterized in that: A heat exchange plate (3) is fixedly installed at one end of the cooling box (28), and a cooling fan (31) is fixedly connected to one side surface of the heat exchange plate (3).

6. The cooling device for the ball screw in an electronic load fatigue testing machine according to claim 5, characterized in that: The heat exchange plate (3) is fixedly connected to the heat exchange tube (32), which is fixedly connected to the inside of the cooling box (28).

7. The cooling device for the ball screw in an electronic load fatigue testing machine according to claim 6, characterized in that: The heat exchange tube (32) is a hollow tube, and its end is located at the other end of the cooling box (28).

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