Gearbox with gear oil convenient to replace

Abstract

The utility model discloses a gearbox convenient to replace gear oil, which comprises a clutch shell, a gear box and a top cover, an oil discharge pipe is arranged at the bottom of the gear box, a delay cover is arranged on the inner side of the gear box, and a lifting cylinder, an opening and closing mechanism and other parts are arranged in the delay cover, so that the operation safety is obviously improved, the gear oil is discharged in a delayed manner, and the gear oil can be conveniently replaced. When gear oil is replaced, the delay cover and the lifting cylinder effectively avoid the risk that the oil is suddenly splashed in the traditional replacement process, so that the safety of the operation process is ensured; in addition, an operator does not need to carry out tedious dismounting steps, the maintenance convenience is greatly improved, better safety guarantee is provided for the operator through the improvement, and the gearbox can be maintained more easily and efficiently.

Description

Technical Field

[0001] The utility model relates to the technical field of gearbox maintenance, in particular to a gearbox which is convenient for replacing gear oil. Background Art

[0002] The gearbox is a vital component in the automotive powertrain, responsible for transmitting the engine's power to the wheels while providing different speeds and torques through different combinations of gears. During the maintenance and care of the gearbox, regular replacement of the gear oil is a key step to ensure the normal operation of the gearbox and extend its service life.

[0003] In existing vehicle designs, the drain bolt is usually located at the bottom of the gearbox. When the gear oil needs to be replaced, the operator needs to jack up the vehicle and unscrew the drain bolt to let the old gear oil flow out. There is a problem in this process: when the drain bolt is unscrewed, the gear oil will flow out immediately. Due to the location of the drain port and the impact force of the oil flow, it is very easy to contaminate the operator's hands and even clothes, which not only brings inconvenience to the operator, but also may pose a potential risk to his health.

[0004] Therefore, it is necessary to improve the existing gearbox to improve the convenience and safety of maintenance. Utility Model Content

[0005] The purpose of the utility model is to overcome the above technical deficiencies, provide a gearbox that is convenient for replacing gear oil, and solve the technical problems raised in the background technology.

[0006] In order to achieve the above technical objectives, the technical solution of the utility model provides a gearbox which is easy to replace gear oil, including: a clutch housing, a gear box and a top cover, the clutch housing is arranged at one end of the gear box to close it, the top cover is arranged on the upper part of the gear box, an oil drain pipe is arranged at the bottom of the gear box, a delay cover is arranged on the inner side of the gear box, the delay cover is a cylinder with a closed upper end and a lower end connected to the oil drain pipe, a plurality of oil outlet holes are arranged on the cylinder wall of the delay cover, a lifting cylinder is arranged inside the delay cover, the outer diameter of the lifting cylinder is equal to the inner diameter of the delay cover, an oil drain hole matching the oil outlet hole is arranged on the cylinder wall of the lifting cylinder, a limiting mechanism is arranged inside the delay cover, and when the lifting cylinder moves to the end along the limiting mechanism, the oil drain hole is opposite to the oil outlet hole.

[0007] Furthermore, the limiting mechanism includes a polygonal column, the upper end of the lifting cylinder is closed, the upper end of the polygonal column is connected to the top of the delay cover, the lower end passes through the top wall of the lifting cylinder and is provided with a limiting nut, and a reset spring is provided between the lifting cylinder and the top wall of the delay cover.

[0008] Furthermore, an oil drain bolt is arranged in the oil drain pipe.

[0009] Furthermore, a horizontal guide tube is provided at the bottom of the gear box, the oil drain tube passes through the guide tube and is connected thereto, an oil drain hole is provided on the tube wall of the guide tube, the two lifting cylinders are mirror-imaged in the guide tube with the oil drain tube as the center, an opening and closing mechanism is provided in the oil drain tube, and the opening and closing mechanism drives the two lifting cylinders to move closer to or away from each other.

[0010] Furthermore, the opening and closing mechanism includes an oil guide pipe, an end cover is provided on one end of the oil drain pipe that passes through the guide pipe, the upper end of the oil guide pipe is rotatably connected to the end cover, a plurality of oil guide holes are provided on the pipe wall of the oil guide pipe, a cam is provided on the upper part of the oil guide pipe, a drive ring is provided on the lower end, the drive ring is provided below the oil drain pipe, and a baffle matching with the cam is provided on the side of the lifting cylinder adjacent to the cam.

[0011] Furthermore, sealing rings are provided on the lifting cylinders at the upper and lower ends of the oil drain hole.

[0012] Compared with the prior art, the beneficial effects of the utility model include:

[0013] The utility model significantly improves the safety of operation by adding components such as a delay cover, a lifting cylinder, and an opening and closing mechanism, and realizes the delayed discharge of gear oil. When replacing the gear oil, the delay cover and the lifting cylinder effectively avoid the risk of sudden oil splashing during the traditional replacement process, thereby ensuring the safety of the operation process; in addition, the operator can quickly replace the gear oil through simple operations without complicated disassembly steps, greatly improving the convenience of maintenance. This improvement not only provides better safety protection for operators, but also makes the maintenance of the gearbox easier and more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of a gearbox provided by the utility model for facilitating the replacement of gear oil;

[0015] Figure 2 It is an enlarged view of point A of a schematic diagram of a gearbox for facilitating replacement of gear oil provided by the utility model;

[0016] Figure 3 It is a schematic diagram of a lifting cylinder of a gearbox which is convenient for replacing gear oil provided by the utility model;

[0017] Figure 4 It is an exploded view of a third embodiment of a gearbox for facilitating replacement of gear oil provided by the utility model. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0019] Example 1

[0020] Reference Figure 1 , Figure 2 The utility model provides a gearbox that is easy to replace gear oil, mainly including a clutch housing 1, a gear box 2 and a top cover 3. The clutch housing 1 is arranged at one end of the gear box 2 to close it. The top cover 3 is located on the upper part of the gear box 2. At the bottom of the gear box 2, a drain pipe 201 is specially provided, and a drain bolt 8 is installed in the drain pipe 201 to discharge the old gear oil. The gearbox adds a delay cover 202 on the inner side of the gear box 2. The delay cover 202 is designed to be a cylindrical shape with a closed upper end, and its lower end is tightly connected to the drain pipe 201. A plurality of oil outlet holes 204 are opened on the cylinder wall of the delay cover 202 to control the outflow of oil.

[0021] A lifting cylinder 4 is also provided inside the time-delay cover 202. The outer diameter of the lifting cylinder 4 is exactly equal to the inner diameter of the time-delay cover 202, and the lifting cylinder 4 can move up and down inside the time-delay cover 202. The wall of the lifting cylinder 4 also has oil drain holes 401, which match the oil outlet holes 204 on the time-delay cover 202 in position and size.

[0022] In normal state, the drain bolt 8 pushes the lifting cylinder 4 upward, and the oil outlet hole 204 and the oil drain hole 401 are staggered while closing the oil drain pipe 201, so that the oil outlet hole 204 is closed through the outer wall of the lifting cylinder 4. When draining the oil, the drain bolt 8 is removed, and the lifting cylinder 4 descends under its own gravity, and the gear oil is discharged when the oil outlet hole 204 and the oil drain hole 401 are aligned, thereby achieving delayed discharge of the gear oil and avoiding sudden splashing of the oil to contaminate the operator's hands.

[0023] Embodiment 2,

[0024] Reference Figure 2 , Figure 3, because the outer diameter of the lifting cylinder 4 is made exactly equal to the inner diameter of the delay cover 202 to achieve the slow sliding of the lifting cylinder 4, the manufacturing difficulty is relatively high. On the basis of Example 1: the upper end of the lifting cylinder 4 is closed, and a polygonal column 203 is also arranged inside the delay cover 202. The upper end of the polygonal column 203 is firmly connected to the top of the delay cover 202, and its lower end passes through the top wall of the lifting cylinder 4 and is equipped with a limit nut. The polygonal column 203 can prevent the lifting cylinder 4 from rotating in the delay cover 202, thereby ensuring that the oil outlet 204 can face the oil drain hole 401 when the upper end of the lifting cylinder 4 contacts the limit nut. Seal rings 403 are specially arranged on the lifting cylinder 4 at the upper and lower ends of the oil drain hole 401. These seal rings 403 can effectively close the gap, ensuring that the oil can only flow out through the oil drain hole 401 and the oil outlet 204, while forming a closed cavity between the upper end of the lifting cylinder 4 and the delay cover 202.

[0025] When the drain bolt 8 is removed, air can only enter through the gap between the polygonal column 203 and the top wall of the lifting cylinder 4, so negative pressure is formed between the upper end of the lifting cylinder 4 and the delay cover 202, thereby delaying the descending speed of the lifting cylinder 4 to achieve delayed discharge of the gear oil. In actual applications, a return spring 402 can also be installed between the lifting cylinder 4 and the top wall of the delay cover 202. By using springs with different restoring forces, the delay time of the gear oil discharge can be adjusted as needed.

[0026] Embodiment 3,

[0027] Reference Figure 4 In actual application, the drain bolt 8 and the gear box 2 are usually separated, which leads to the frequent loss of the drain bolt 8. Therefore, based on the second embodiment: a horizontal guide tube 5 is also provided at the bottom of the gear box 2, and the drain pipe 201 passes through the guide pipe 5 and communicates with it. An oil drain hole 501 is provided on the wall of the guide pipe 5. With the drain pipe 201 as the center, two lifting cylinders 4 are mirror-imaged in the guide pipe 5. An opening and closing mechanism is also provided inside the drain pipe 201, which can drive the two lifting cylinders 4 to move closer or farther from each other, so that the upper oil drain hole 401 and the oil drain hole 501 are directly opposite to each other, thereby controlling the discharge of oil.

[0028] The opening and closing mechanism includes an oil guide tube 6, the upper end of which is rotatably connected to an end cap 7 installed at one end of the oil drain tube 201 that passes through the guide tube 5. A plurality of oil guide holes 601 are arranged on the tube wall of the oil guide tube 6, and a cam 602 is also arranged on the upper part of the oil guide tube 6, and a driving ring 603 is arranged on the lower end. The driving ring 603 is located below the oil drain tube 201; a baffle 404 cooperating with the cam 602 is arranged on the side of the lifting cylinder 4 adjacent to the cam 602. In actual application, the cam 602 can be set to an elliptical shape, and a push surface is respectively arranged at both ends of its long axis. When the oil guide tube 6 is rotated by the driving ring 603, the push surface of the cam 602 will contact the baffles 404 on the two lifting cylinders 4 in turn, thereby pushing them away from each other and compressing the reset spring 402. When the short shaft of the cam 602 contacts the baffle 404, the driving force is reduced. At this time, the return spring 402 drives the lifting cylinders 4 to move closer to each other. At the extreme position where the two lifting cylinders 4 are close to or away from each other, the oil drain hole 401 and the oil leakage hole 501 are opposite to each other to realize oil discharge, thereby eliminating the trouble of disassembling the oil drain bolt 8.

[0029] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A gearbox that is convenient for replacing gear oil, comprising: A clutch housing, a gear box and a top cover, the clutch housing is arranged at one end of the gear box to close it, the top cover is arranged on the upper part of the gear box, and an oil drain pipe is arranged at the bottom of the gear box, characterized in that: a delay cover is arranged on the inner side of the gear box, the delay cover is a cylinder with a closed upper end and a lower end connected to the oil drain pipe, a plurality of oil outlet holes are arranged on the cylinder wall of the delay cover, a lifting cylinder is arranged inside the delay cover, the outer diameter of the lifting cylinder is equal to the inner diameter of the delay cover, an oil drain hole matching the oil outlet hole is arranged on the cylinder wall of the lifting cylinder, a limiting mechanism is arranged inside the delay cover, and when the lifting cylinder moves to the end along the limiting mechanism, the oil drain hole is opposite to the oil outlet hole.

2. A gearbox for facilitating replacement of gear oil according to claim 1, characterized in that: The limiting mechanism includes a polygonal column, the upper end of the lifting cylinder is closed, the upper end of the polygonal column is connected to the top of the delay cover, the lower end passes through the top wall of the lifting cylinder and is provided with a limiting nut, and a reset spring is provided between the lifting cylinder and the top wall of the delay cover.

3. A gearbox for facilitating replacement of gear oil according to claim 1 or 2, characterized in that: An oil drain bolt is arranged in the oil drain pipe.

4. A gearbox for facilitating replacement of gear oil according to claim 2, characterized in that: A horizontal guide tube is arranged at the bottom of the gear box, the oil drain tube passes through the guide tube and is connected with the guide tube, an oil drain hole is arranged on the tube wall of the guide tube, the two lifting cylinders are arranged in the guide tube in a mirror image with the oil drain tube as the center, an opening and closing mechanism is arranged in the oil drain tube, and the opening and closing mechanism drives the two lifting cylinders to move closer to or away from each other.

5. A gearbox for facilitating replacement of gear oil according to claim 4, characterized in that: The opening and closing mechanism includes an oil guide pipe, an end cover is provided on one end of the oil drain pipe that passes through the guide pipe, the upper end of the oil guide pipe is rotatably connected to the end cover, a plurality of oil guide holes are provided on the pipe wall of the oil guide pipe, a cam is provided on the upper part of the oil guide pipe, a drive ring is provided on the lower end, the drive ring is provided below the oil drain pipe, and a baffle matching with the cam is provided on the side of the lifting cylinder adjacent to the cam.

6. A gearbox for facilitating replacement of gear oil according to claim 1, 2, 4 or 5, characterized in that: Sealing rings are arranged on the lifting cylinder at the upper and lower ends of the oil drain hole.

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