Gearbox forced lubrication mechanism

Abstract

A kind of gearbox forced lubrication mechanism, including oil injection pipe, oil pipe connecting assembly and oil delivery assembly;Oil injection pipe one end is connected by oil pipe joint into lubricating oil, and the pipe wall of oil injection pipe is equipped with rotating shaft oil supply hole;Oil delivery assembly includes oil injection pipe spacer sleeve and oil pipe, and oil injection pipe spacer sleeve is sleeved on oil injection pipe, and the sleeve of oil injection pipe spacer sleeve corresponds and communicates with rotating shaft oil supply hole, and the import end of oil pipe is set in sleeve, and the outlet end of oil pipe is stretched out of sleeve, and annular radial protrusion is set;Oil pipe connecting assembly includes rotating shaft spacer sleeve, pressing plate and fastener, and rotating shaft spacer sleeve is sleeved on rotating shaft, and rotating shaft spacer sleeve is equipped with the connecting hole that can be connected rotating shaft oil inlet hole and oil pipe, and pressing plate is set in oil pipe, and simultaneously press tightly rotating shaft spacer sleeve and radial protrusion, and fastener is fixedly connected with pressing plate and rotating shaft spacer sleeve.The utility model solves the problem that rotating shaft axle end cannot be drilled for oil supply, and the needle bearing and spline on rotating shaft need forced lubrication.

Description

Technical Field

[0001] This utility model belongs to the field of gearbox lubrication technology, specifically relating to a gearbox forced lubrication mechanism. Background Technology

[0002] Currently, gearbox lubrication methods are generally divided into two conventional methods: splash lubrication and forced lubrication. When the gear linear speed is too high, forced lubrication is often required. Since gears and needle roller bearings are mounted on the shaft, and the needle roller bearings are installed between the shaft and the gears, oil supply from inside the shaft is necessary to ensure their lubrication. For constantly meshing gears, they are often mounted on the shaft using a spline fit to transmit torque; the spline lubrication also requires oil supply from inside the shaft.

[0003] In existing technologies, lubrication of needle roller bearings and gear splines typically involves introducing oil through elongated oil holes at the shaft end. For multi-shaft gearboxes, this often requires drilling holes at each shaft end and connecting them separately via oil pipes, resulting in high manufacturing costs and complex assembly processes. Furthermore, in cases where an oil pump and load are installed at the shaft end, it is impossible to machine elongated holes at the shaft end for oil supply and lubrication. Utility Model Content

[0004] The purpose of this invention is to provide a forced lubrication mechanism for a gearbox that eliminates the need for an oil inlet hole at the shaft end of the rotating shaft. Instead, an inlet hole is made in the shaft body of the rotating shaft and connected to an oil supply mechanism on one side, thereby enabling oil supply to the inside of the rotating shaft. This solves the problem that when a lubrication pump and load equipment are installed at the shaft end of the rotating shaft, an inlet hole cannot be made at the shaft end for oil supply, while the needle roller bearings and splines on the rotating shaft require forced lubrication.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a gearbox forced lubrication mechanism, including an oil injection pipe, an oil supply pipe connection assembly, and an oil supply assembly; the oil injection pipe is arranged parallel to the rotating shaft inside the gearbox, both ends of the oil injection pipe are supported on the gearbox housing, one end of the oil injection pipe is connected to lubricating oil through a connected oil pipe joint, and a rotating shaft oil supply hole is provided through the pipe wall of the oil injection pipe.

[0006] The oil delivery assembly includes an injection pipe sleeve and an oil delivery pipe. The injection pipe sleeve is fitted onto the outer circumference of the injection pipe. A sleeve provided on the injection pipe sleeve corresponds to and communicates with the oil supply hole of the rotating shaft. The inlet end of the oil delivery pipe is fitted inside the sleeve, and the outlet end of the oil delivery pipe extends out of the sleeve. An annular radial protrusion is provided on the outer circumference of the oil delivery pipe near its outlet end.

[0007] The oil pipeline connection assembly includes a rotating shaft spacer, a pressure plate, and fasteners. The rotating shaft spacer is fitted onto the outer circumferential surface of the rotating shaft and has a connection hole that connects the oil inlet of the rotating shaft and the oil pipeline. The pressure plate is fitted onto the outer circumferential surface of the oil pipeline and simultaneously presses against the surface of the rotating shaft spacer and the radial protrusion. The pressure plate and the rotating shaft spacer are fixedly connected by the fasteners.

[0008] Sealing structures are provided on both sides of the oil supply hole of the rotating shaft, between the sleeves of the oil supply pipe and the oil injection pipe, between the radial protrusion of the oil supply pipe and the pressure plate, and on both sides of the oil inlet hole of the rotating shaft.

[0009] Furthermore, the inner circular surface of the pressure plate is provided with a stepped surface, which presses against the radial protrusion, and the end face of the pressure plate is pressed against the rotating shaft spacer.

[0010] Furthermore, the fastener is a bolt and a spring washer fitted onto the bolt.

[0011] Furthermore, the top of the radial protrusion is provided with an annular groove, and a sealing ring is installed in the annular groove.

[0012] Furthermore, a sealing ring is provided on each side of the oil inlet hole of the rotating shaft. The sealing ring is installed between the rotating shaft spacer and the rotating shaft, and is located in the mounting groove on the outer circumference of the rotating shaft.

[0013] Furthermore, the pipe wall of the oil injection pipe is provided with a plurality of oil injection holes for injecting oil into the gears mounted on the rotating shaft, and the diameter of the oil injection holes is smaller than the diameter of the oil supply holes of the rotating shaft.

[0014] Furthermore, the fuel injection pipe is provided with two or more rotary shaft fuel supply holes, and each rotary shaft fuel supply hole supplies fuel to one rotary shaft through the fuel supply pipe connection assembly and the fuel supply assembly.

[0015] Furthermore, the diameter of the oil supply hole of the rotating shaft is smaller than the inner diameter of the tube opening of the sleeve on the fuel injection pipe spacer.

[0016] Furthermore, a sealing component is provided at the end of the fuel injection pipe away from the fuel pipe joint.

[0017] Furthermore, the sealing assembly includes an injection pipe plug that blocks the injection pipe opening and an injection pipe positioning plug disposed in the gearbox housing mounting hole. The injection pipe positioning plug is axially positioned by an elastic retaining ring for the hole, and a sealing ring is used to seal between the injection pipe positioning plug and the wall of the mounting hole.

[0018] The beneficial effects of this utility model are: 1. The structure adopted by this utility model solves the problem that when a lubrication pump and load equipment are installed on the shaft end of a rotating shaft, the shaft end cannot be drilled to supply oil, while the needle roller bearings and splines on the rotating shaft need to be forcibly lubricated.

[0019] 2. The oil injection pipe of this utility model can be opened with multiple rotating shaft oil supply holes to realize centralized forced oil supply to multiple shaft systems. The structure is compact, and the position and orientation of the rotating shaft oil supply holes can be targeted according to different rotating shafts during the processing. By controlling the diameter of the rotating shaft oil supply holes and oil injection holes on the oil injection pipe, the amount of lubricating oil in each part of the gearbox shaft system can be quantitatively controlled.

[0020] 3. The fuel injection pipe is integrated inside the gearbox housing, avoiding leakage, aging and damage to the fuel pipe and seals, ensuring long-term stable and reliable lubrication system performance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 for Figure 1 Axial view;

[0023] Figure 3 for Figure 1 Schematic diagram of the connection structure between the oil pipeline and the rotating shaft;

[0024] The markings in the diagram are: 1. Gearbox housing, 2. Oil pipe connector, 3. First sealing ring, 4. Injection pipe, 5. Oil supply pipe, 6. Injection pipe spacer, 7. Second sealing ring, 8. Third sealing ring, 9. Fourth sealing ring, 10. Bolt, 11. Spring washer, 12. Pressure plate, 13. Rotary shaft spacer, 14. Sealing ring, 15. Rotary shaft, 16. Injection pipe plug, 17. Fifth sealing ring, 18. Hole elastic retaining ring, 19. Injection pipe positioning plug, 20. Injection hole, 21. Rotary shaft oil supply hole, 22. Radial protrusion, 23. Annular groove, 24. Rotary shaft oil inlet hole. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention in any way.

[0026] See attached document Figure 1-3As shown, a forced lubrication mechanism for a transmission includes a housing 1, an oil pipe connector 2, a first sealing ring 3, an oil injection pipe 4, an oil delivery pipe 5, an oil injection pipe spacer 6, a second sealing ring 7, a third sealing ring 8, a fourth sealing ring 9, a bolt 10, a spring washer 11, a pressure plate 12, a rotating shaft spacer 13, a sealing ring 14, a rotating shaft 15, an oil injection pipe plug 16, a fifth sealing ring 17, a hole elastic retaining ring 18, and an oil injection pipe positioning plug 19. The first sealing ring 3, the second sealing ring 7, the third sealing ring 8, the fourth sealing ring 9, and the fifth sealing ring 17 are all O-rings.

[0027] like Figure 1 As shown, the fuel injection pipe 4 is located on one side of the rotating shaft 15 and is arranged parallel to the rotating shaft 15. An axially extending lubricating oil passage is provided inside the fuel injection pipe 4. Both ends of the fuel injection pipe 4 are supported in the mounting holes of the gearbox housing 1. The left end of the fuel injection pipe 4 has an opening and communicates with the oil pipe connector 2 installed on the gearbox housing 1. Lubricating oil is introduced into the fuel injection pipe 4 through the oil pipe connector 2. The left end of the fuel injection pipe 4 and the gearbox housing 1 are sealed by a first sealing ring 3. The right end of the fuel injection pipe 4 is closed, or it also has an opening, and a fuel injection pipe plug 16 is installed at the opening. A fuel injection pipe positioning plug 19 is installed in the mounting hole on the gearbox housing 1 that supports the rear end of the fuel injection pipe 4. The fuel injection pipe positioning plug 19 is axially positioned by a hole elastic retaining ring 18, and a fifth sealing ring 17 seals the fuel injection pipe positioning plug 19 and the wall of the mounting hole.

[0028] The oil injection pipe 4 has multiple oil injection holes 20 on its wall, which are connected to the oil passages inside the oil injection pipe 4 for lubricating the gears mounted on the rotating shaft 4. The oil injection pipe 4 also has at least one rotating shaft oil supply hole 21 on its wall, which is connected to the oil passages inside the oil injection pipe 4 for supplying lubricating oil to the rotating shaft 15. The diameter of the rotating shaft oil supply hole 21 is larger than the diameter of the oil injection holes 20 to ensure sufficient flow of lubricating oil into the rotating shaft 15. A T-shaped oil injection pipe spacer 6 is fitted around the outer circumference of the oil injection pipe 4. A sleeve is provided on one side of the oil injection pipe spacer 6, which corresponds to and connects with the rotating shaft oil supply hole 21. Two third sealing rings 8 are installed between the oil injection pipe spacer 6 and the wall of the oil injection pipe 4, located on either side of the rotating shaft oil supply hole 21, to achieve a seal between the oil injection pipe 4 and the oil injection pipe spacer 6. The oil injection pipe spacer 6 has an oil delivery pipe 5 installed inside its sleeve. A second sealing ring 7 is installed on the outer circumference of the oil delivery pipe 5 to achieve a seal between the oil delivery pipe 5 and the oil injection pipe spacer 6. The other end of the oil delivery pipe 5 is connected to the radially arranged rotary shaft oil inlet 24 on the rotary shaft 15, thereby providing lubricating oil to the interior of the rotary shaft 15.

[0029] Figure 3 The connection relationship between the oil pipeline 5 and the rotating shaft 15 is given. (Combined with...) Figure 1 and Figure 3 A rotating shaft spacer 13 is fitted onto the rotating shaft 15 at the position of the rotating shaft oil inlet 24. The rotating shaft spacer 13 has a connecting hole that is aligned with and communicates with the rotating shaft oil inlet 24. Two sealing rings 14 are installed between the rotating shaft spacer 13 and the rotating shaft 15. The sealing rings 14 are fitted into the mounting grooves on the outer circumference of the rotating shaft 15. The two sealing rings 14 are located on both sides of the rotating shaft oil inlet 24 to achieve sealing of the rotating shaft oil inlet 24 during rotation. The outer circumference of the oil supply pipe 5 is provided with a circumferentially extending radial protrusion 22 near the rotating shaft 15. The top end of the radial protrusion 22 is provided with an annular groove 23 for installing a fourth sealing ring 9. The radial protrusion 22 of the oil supply pipe 5 presses against the surface of the rotating shaft spacer 13. A pressure plate 12 is also fitted onto the oil pipe 5. The fourth sealing ring 9 inside the radial protrusion 22 and the inner circular surface of the pressure plate 12 are in contact to form a sealing structure. The inner circular surface of the pressure plate 12 is also provided with a stepped surface that can press on the radial protrusion 22. After the bolt 10 passes through the spring washer 11, the rotating shaft spacer 13 and the pressure plate 12 are fastened together, thereby realizing the connection between the oil pipe 5 and the rotating shaft 15. Moreover, a certain gap is left between the end of the oil pipe 5 and the rotating shaft 15 to avoid friction between the rotating shaft 15 and the oil pipe 5 when the rotating shaft 15 rotates. When the rotating shaft 15 rotates, the rotating shaft spacer 13 remains stationary, and the sealing ring 14 provides a floating seal to ensure the normal rotation of the rotating shaft 15.

[0030] In this utility model, the fuel injection pipe spacer 6 and the fuel delivery pipe 5 form a fuel delivery assembly, which connects the fuel injection pipe 4 and the rotating shaft 15. The rotating shaft spacer 13, the pressure plate 12, the bolt 10 and the spring washer 11 form a fuel delivery pipe connection assembly, which realizes the connection between the fuel delivery pipe 5 and the rotating shaft 15.

[0031] Furthermore, the portion of the fuel supply pipe 5 inserted into the fuel injection pipe spacer 6 can move relative to the fuel injection pipe spacer 6 in a sealed state, thereby making the length of the protruding portion of the fuel supply pipe 5 adjustable. This makes installation more convenient, as it eliminates the need to precisely consider the distance between the rotating shaft 15 and the fuel injection pipe 4. After the fuel supply pipe 5 is installed into the fuel injection pipe spacer 6, the length of the protruding portion of the fuel supply pipe 5 can be adjusted by pushing and pulling the fuel supply pipe 5, allowing it to connect with the rotating shaft 15 through the rotating shaft spacer 13 and the pressure plate 12.

[0032] like Figure 1 As shown, in this embodiment, the fuel injection pipe 4 is provided with two rotating shaft oil supply holes 21, which are then connected to two rotating shafts 15 respectively through two oil supply assemblies composed of fuel injection pipe spacers 6 and oil supply pipes 5, providing lubricating oil to the two rotating shafts 15. The position of the rotating shaft oil supply holes 21 on the fuel injection pipe 4 can be set according to the positional relationship between the rotating shafts 15 and the fuel injection pipe 4. Figure 2As shown, the two rotating shafts 15 are located in different directions relative to the fuel injection pipe 4.

[0033] When the gearbox is under forced lubrication, lubricating oil enters the injection pipe 4 through the oil pipe connector 2, is sprayed onto the gears through several small-diameter injection holes 20, and enters the oil supply pipe 5 through several large-diameter rotating shaft oil supply holes 21, finally entering the rotating shaft 15 to supply oil. The rotating shaft 15 has lubrication oil passages as needed to lubricate the roller bearings and gear splines mounted on the shaft. During operation, sealing rings on both sides of the lubrication oil passages of the rotating shaft 15 ensure a seal and prevent leakage.

[0034] Furthermore, the diameter of the rotary shaft oil supply hole 21 is smaller than the inner diameter of the sleeve on the fuel injection pipe spacer 6. In this way, when the fuel injection pipe spacer 6 is installed, while ensuring that the sleeve on the fuel injection pipe spacer 6 is connected to the rotary shaft oil supply hole 21 on the fuel injection pipe 4, it can be rotated and adjusted to different positions to adapt to oil supply and lubrication in different directions. It can also reduce the positional accuracy of the rotary shaft oil supply hole 21 on the fuel injection pipe 4 and reduce the machining difficulty.

[0035] It should be noted that in this embodiment, the fuel injection pipe 4 is a steel pipe or other metal pipe with a pre-machined cavity. Then, fuel injection holes 20 and rotary shaft oil supply holes 21 are machined on the pipe wall as needed. The rotary shaft oil supply hole 21 is machined to the required dimensions to control the oil intake and achieve lubricant distribution. Since a steel pipe with a pre-machined cavity is used, sealing components such as fuel injection pipe plugs and fuel injection pipe positioning plugs are needed to seal one end of the pipe. In other embodiments, the fuel injection pipe can be directly machined from bar stock. In this case, one end of the fuel injection pipe is open for oil intake, and the other end is closed, eliminating the need for sealing components. While this machining method is more expensive, it still achieves the technical effects of this invention.

[0036] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the specific implementation of this utility model with reference to the above embodiments. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model are within the protection scope of the pending claims.

Claims

1. A forced lubrication mechanism for a gearbox, characterized in that: It includes an injection pipe, an oil supply pipe connection assembly, and an oil supply assembly; the injection pipe is arranged parallel to the rotating shaft inside the gearbox, both ends of the injection pipe are supported on the gearbox housing, one end of the injection pipe is connected to the lubricating oil through the connected oil pipe joint, and a rotating shaft oil supply hole is provided through the pipe wall of the injection pipe. The oil delivery assembly includes an injection pipe sleeve and an oil delivery pipe. The injection pipe sleeve is fitted onto the outer circumference of the injection pipe. A sleeve provided on the injection pipe sleeve corresponds to and communicates with the oil supply hole of the rotating shaft. The inlet end of the oil delivery pipe is fitted inside the sleeve, and the outlet end of the oil delivery pipe extends out of the sleeve. An annular radial protrusion is provided on the outer circumference of the oil delivery pipe near its outlet end. The oil pipeline connection assembly includes a rotating shaft spacer, a pressure plate, and fasteners. The rotating shaft spacer is fitted onto the outer circumferential surface of the rotating shaft and has a connection hole that connects the oil inlet of the rotating shaft and the oil pipeline. The pressure plate is fitted onto the outer circumferential surface of the oil pipeline and simultaneously presses against the surface of the rotating shaft spacer and the radial protrusion. The pressure plate and the rotating shaft spacer are fixedly connected by the fasteners. Sealing structures are provided on both sides of the oil supply hole of the rotating shaft, between the sleeves of the oil supply pipe and the oil injection pipe, between the radial protrusion of the oil supply pipe and the pressure plate, and on both sides of the oil inlet hole of the rotating shaft.

2. The gearbox forced lubrication mechanism according to claim 1, characterized in that: The inner circular surface of the pressure plate is provided with a stepped surface, which presses on the radial protrusion, and the end face of the pressure plate is pressed tightly against the rotating shaft spacer.

3. The gearbox forced lubrication mechanism according to claim 1, characterized in that: The fasteners are bolts and spring washers fitted onto the bolts.

4. The gearbox forced lubrication mechanism according to claim 1, characterized in that: The top of the radial protrusion is provided with an annular groove, and a sealing ring is installed in the annular groove.

5. The gearbox forced lubrication mechanism according to claim 1, characterized in that: A sealing ring is provided on each side of the oil inlet hole of the rotating shaft. The sealing ring is installed between the rotating shaft spacer and the rotating shaft and is located in the mounting groove on the outer circumference of the rotating shaft.

6. The gearbox forced lubrication mechanism according to claim 1, characterized in that: The pipe wall of the oil injection pipe is also provided with a plurality of oil injection holes for spraying oil onto the gears mounted on the rotating shaft. The diameter of the oil injection holes is smaller than the diameter of the oil supply holes of the rotating shaft.

7. The gearbox forced lubrication mechanism according to claim 1, characterized in that: The fuel injection pipe is provided with two or more rotary shaft fuel supply holes, and each rotary shaft fuel supply hole supplies fuel to one rotary shaft through the fuel supply pipe connection assembly and the fuel supply assembly.

8. The gearbox forced lubrication mechanism according to claim 1, characterized in that: The diameter of the oil supply hole of the rotating shaft is smaller than the inner diameter of the tube opening of the sleeve on the fuel injection pipe spacer.

9. The gearbox forced lubrication mechanism according to claim 1, characterized in that: A sealing component is provided at the end of the fuel injection pipe away from the fuel pipe joint.

10. The gearbox forced lubrication mechanism according to claim 9, characterized in that: The sealing assembly includes an injection pipe plug that blocks the injection pipe inlet and an injection pipe positioning plug that is installed in the mounting hole of the gearbox housing. The injection pipe positioning plug is axially positioned by an elastic retaining ring for the hole, and a sealing ring is used to seal between the injection pipe positioning plug and the wall of the mounting hole.

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