Crowned gear coupling with oil supply and lubrication functions

Abstract

The invention discloses a crowned gear coupling with oil supply and lubrication functions, belongs to the technical field of crowned gear couplings, and aims to solve the problems that an existing crowned gear coupling is poor in lubrication effect and large in abrasion of a tooth meshing area, and the service life of the crowned gear coupling is greatly shortened. The crowned gear coupling comprises a coupling shell unit and a coupling internal transmission unit, the coupling internal transmission unit is coaxially inserted into the coupling shell unit, the input end of the coupling internal transmission unit is connected with a power input shaft, and the output end of the coupling internal transmission unit is connected with a power output shaft. The coupling shell unit is provided with an oil supply channel and an oil discharge channel, lubricating oil enters the coupling shell unit through the oil supply channel, flows through the middle connecting assembly and is finally discharged through the oil discharge channel, and therefore oil supply lubrication of the crowned gear coupling is achieved. The coupling structure is mainly used for achieving synchronous rotation of the two shafts.

Description

Technical Field

[0001] The invention belongs to the technical field of drum gear couplings, and in particular relates to a drum gear coupling with an oil supply and lubrication function. Background Art

[0002] The drum gear coupling is a rigid movable structure used to connect two coaxial shafts to rotate together and transmit torque. The drum gear coupling is an important aspect of the application of involute gears. Generally, the inner and outer gear pairs with the same parameters cooperate with each other to transmit torque, and can compensate for the axial deviation, radial deviation and angular deviation caused by the inclination of the axis between the two axes. When the axis of the drum gear coupling has an angular displacement, relative sliding occurs between the tooth surfaces of the inner and outer gear sleeves. Due to the low relative speed, it is not easy to form a dynamic pressure oil film, so the damage form is tooth surface wear. The main measure to reduce wear is to improve the lubrication method. The current drum gear coupling has poor lubrication quality and insufficient lubrication, resulting in serious tooth surface wear, which greatly reduces the service life of the drum gear coupling. Therefore, the development of a drum gear coupling with oil supply and lubrication function is of great significance for improving the bearing capacity of gears, extending service life, improving productivity, and saving energy. Summary of the invention

[0003] In order to solve the problems that the existing drum gear coupling has poor lubrication effect, large wear in the tooth meshing area, and greatly shortened service life of the drum gear coupling, the present invention provides a drum gear coupling with oil supply and lubrication function.

[0004] A drum gear coupling with oil supply and lubrication function, the drum gear coupling comprises a coupling housing unit and an internal transmission unit of the coupling, the internal transmission unit of the coupling is coaxially inserted in the coupling housing unit, and both ends of the internal transmission unit of the coupling extend to the outside of the coupling housing unit, the input end of the internal transmission unit of the coupling is connected to a power input shaft, and the output end of the internal transmission unit of the coupling is connected to a power output shaft;

[0005] The internal transmission unit of the coupling includes an input end flange, an output end flange and a middle connection assembly, one end of the input end flange extends to the outside of the coupling housing unit and is connected to the power input shaft, the other end of the input end flange is detachably connected to one end of the middle connection assembly through a plurality of fastening assemblies, one end of the output end flange extends to the outside of the coupling housing unit and is connected to the power output shaft, and the other end of the output end flange is detachably connected to the other end of the middle connection assembly through a plurality of fastening assemblies;

[0006] The coupling housing unit is provided with an oil supply channel and an oil discharge channel. The lubricating oil enters the coupling housing unit through the oil supply channel, flows through the middle connecting assembly, and is finally discharged through the oil discharge channel, thereby realizing the oil supply and lubrication of the drum gear coupling.

[0007] Further, the coupling housing unit comprises an input end housing connection flange, a drum gear coupling housing and an output end housing connection flange, the input end housing connection flange is inserted into the input end of the drum gear coupling housing, and the outer wall of the input end housing connection flange and the inner wall of the drum gear coupling housing are sealed by two O-rings, the output end housing connection flange is inserted into the output end of the drum gear coupling housing, and the outer wall of the output end housing connection flange and the inner wall of the drum gear coupling housing are sealed by another two O-rings;

[0008] Further, the drum gear coupling housing comprises an upper housing and a lower housing, the upper housing is buckled on the lower housing, and the upper housing and the lower housing are fastened and connected by bolt and nut assemblies, two fuel injection pipes are inserted at the bottom center of the lower housing, the fuel inlet ends of the two fuel injection pipes extend to the outside of the lower housing, the fuel outlet end of one of the two fuel injection pipes is arranged near one end of the middle connecting assembly connected to the input end flange, the fuel outlet end of the other of the two fuel injection pipes is arranged near one end of the middle connecting assembly connected to the output end flange, an oil drain pipe is arranged in the vertical direction along the outer edge of the bottom of the lower housing, and the top end of the oil drain pipe is connected to the lower housing;

[0009] Furthermore, a vent hole is processed on the top of the upper box body, a vent cap is arranged in the vent hole, and the vent cap is detachably connected to the upper box body;

[0010] Further, the middle connection assembly includes two inner gear sleeves and an intermediate shaft outer gear sleeve, the two inner gear sleeves are respectively sleeved on both ends of the intermediate shaft outer gear sleeve, and the two inner gear sleeves are meshed with the intermediate shaft outer gear sleeve, one of the two inner gear sleeves is detachably connected to the input end flange, and the other of the two inner gear sleeves is detachably connected to the output end flange;

[0011] Furthermore, the inner hole of the input end flange and the inner hole of the output end flange are both tapered holes;

[0012] Furthermore, two symmetrically arranged annular groove structures are processed on the inner tooth surface of the inner gear sleeve, and a retaining ring is installed in each annular groove structure;

[0013] Furthermore, the retaining ring is a circular ring structure, a notch is processed at the bottom of the retaining ring, a semicircular hook is provided on both sides of the notch, and each semicircular hook is formed integrally with the retaining ring;

[0014] Further, the outer gear sleeve of the intermediate shaft includes a central sleeve and two gear sleeves, the two gear sleeves are respectively sleeved on the two ends of the central sleeve, and the two gear sleeves are formed integrally with the central sleeve, an annular oil collecting groove is processed on the end surface of each gear sleeve close to the middle end of the central sleeve, and a plurality of radial oil inlet holes are processed on the toothed surface of each gear sleeve at equal intervals along the circumferential direction, and one end of each radial oil inlet hole is connected to the toothed surface of the gear sleeve, and the other end of each radial oil inlet hole is connected to the annular oil collecting groove;

[0015] Furthermore, the tooth surface of the inner gear sleeve and the tooth surface of the outer gear sleeve of the intermediate shaft are both nitrided;

[0016] The beneficial effects of this application compared to the prior art are as follows:

[0017] The present application provides a drum-shaped gear coupling with an oil supply and lubrication function, which adopts a multi-point oil supply lubrication method to ensure that each tooth meshing area of ​​the inner gear sleeve and the outer gear sleeve can be efficiently and stably lubricated and cooled, and the friction between the tooth surfaces generates less heat and has good heat dissipation conditions, thereby reducing tooth surface loss and extending the service life of the drum-shaped gear coupling. The amount of lubricating oil supplied by the device can be accurately adjusted according to the actual working conditions, and can meet various working conditions of the unit. The oil supply and lubrication method is circulating lubrication, and there is no need to shut down the unit for lubrication and maintenance, with high working efficiency and low maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the drum gear coupling described in this application (a represents the input end, b represents the output end);

[0019] Figure 2 This is a schematic diagram of the structure of the coupling housing in the drum gear coupling described in this application (a represents the input end, b represents the output end);

[0020] Figure 3 This is a schematic diagram of the structure of the internal gear sleeve in the drum gear coupling described in this application;

[0021] Figure 4 for Figure 3 A partial enlarged view of the

[0022] Figure 5 This is a schematic diagram of the structure of the retaining ring in the drum gear coupling described in this application;

[0023] Figure 6 This is a schematic structural diagram of the outer gear sleeve of the intermediate shaft in the drum gear coupling described in this application;.

[0024] In the figure, 1 is the input end flange, 2 is the input end housing connecting flange, 3 is the O-ring, 4 is the drum gear coupling housing, 4-1 is the upper housing, 4-2 is the vent cap, 4-3 is the lower housing, 4-4 is the injection pipe, 4-5 is the oil drain pipe, 5 is the inner gear sleeve, 6 is the retaining ring, 7 is the intermediate shaft outer gear sleeve, 7-1 is the annular oil collecting groove, 7-2 is the radial oil inlet hole, 8 is the hinged hole bolt, 9 is the locking nut, 10 is the output end flange and 11 is the output end housing connecting flange. DETAILED DESCRIPTION

[0025] Specific implementation method 1: Combination Figures 1 to 6 This embodiment is described. In this embodiment, a drum gear coupling with an oil supply and lubrication function is provided. The drum gear coupling includes a coupling housing unit and an internal transmission unit of the coupling. The internal transmission unit of the coupling is coaxially inserted in the coupling housing unit, and both ends of the internal transmission unit of the coupling extend to the outside of the coupling housing unit. The input end of the internal transmission unit of the coupling is connected to the power input shaft, and the output end of the internal transmission unit of the coupling is connected to the power output shaft.

[0026] The internal transmission unit of the coupling includes an input end flange 1, an output end flange 10 and a middle connection assembly, one end of the input end flange 1 extends to the outside of the coupling housing unit and is connected to the power input shaft, the other end of the input end flange 1 is detachably connected to one end of the middle connection assembly through a plurality of fastening assemblies, one end of the output end flange 10 extends to the outside of the coupling housing unit and is connected to the power output shaft, and the other end of the output end flange 10 is detachably connected to the other end of the middle connection assembly through a plurality of fastening assemblies;

[0027] The coupling housing unit is provided with an oil supply channel and an oil discharge channel. The lubricating oil enters the coupling housing unit through the oil supply channel, flows through the middle connecting component, and is finally discharged through the oil discharge channel, thereby realizing oil supply and lubrication of the drum gear coupling.

[0028] The fastening assembly in this embodiment is composed of a bored hole bolt 8 and a locking nut 9. Flange structures matching with the input end flange 1 and the output end flange 10 are respectively provided at both ends of the middle connecting assembly. The bored hole bolt 8 is inserted into the two matching flange structures and matched with the locking nut 9 to achieve the fixation between the input end flange 1, the output end flange 10 and the middle connecting assembly.

[0029] Specific implementation method 2: Combination Figures 1 to 6This embodiment is described. The difference between this embodiment and the specific embodiment 1 is that the coupling housing unit includes an input end housing connection flange 2, a drum gear coupling housing 4 and an output end housing connection flange 11. The input end housing connection flange 2 is inserted into the input end of the drum gear coupling housing 4, and the outer wall of the input end housing connection flange 2 and the inner wall of the drum gear coupling housing 4 are sealed by two O-rings 3. The output end housing connection flange 11 is inserted into the output end of the drum gear coupling housing 4, and the outer wall of the output end housing connection flange 11 and the inner wall of the drum gear coupling housing 4 are sealed by another two O-rings 3. Other components and connection methods are the same as those of the specific embodiment 1.

[0030] In this embodiment, the two ends of the drum gear coupling housing 4 are sealed by the O-ring 3, which can effectively ensure that there is no oil leakage on both sides of the drum gear coupling housing, improve the accuracy and stability of the internal lubrication of the drum gear coupling, and reduce the loss of lubricating oil during operation.

[0031] Specific implementation method three: Combination Figures 1 to 6 The present embodiment is described. The present embodiment differs from the second embodiment in that the drum gear coupling housing 4 comprises an upper housing 4-1 and a lower housing 4-3. The upper housing 4-1 is buckled on the lower housing 4-3, and the upper housing 4-1 and the lower housing 4-3 are fastened together by bolt and nut assemblies. Two fuel injection pipes 4-4 are inserted at the bottom center of the lower housing 4-3. The oil inlet ends of the two fuel injection pipes 4-4 extend to the outside of the lower housing 4-3. The oil outlet end of one of the two fuel injection pipes 4-4 is arranged near one end of the middle connecting assembly connected to the input end flange 1, and the oil outlet end of the other of the two fuel injection pipes 4-4 is arranged near one end of the middle connecting assembly connected to the output end flange 10. An oil drain pipe 4-5 is arranged on the outer edge of the bottom of the lower housing 4-3 in the vertical direction, and the top end of the oil drain pipe 4-5 is connected to the lower housing 4-3. Other components and connection methods are the same as those of the second specific implementation method.

[0032] In the present embodiment, a connecting seat is sleeved on the outer wall of the oil inlet end of the oil injection pipe 4-4, and the connecting seat and the oil injection pipe 4-4 are integrally formed. The connecting seat and the lower box body 4-3 are detachably connected by bolts, and a sealing gasket is also provided between the connecting seat and the lower box body 4-3 for sealing. The oil drain pipe 4-5 is welded and fixed to the lower box body 4-3. The oil drain pipe 4-5 discharges the used lubricating oil into the oil filtering device, and the lubricating oil is filtered by the oil filtering device, and the treated lubricating oil is re-transported back to the oil supply tank for continued use, so that the circulating oil supply of the drum gear coupling can be realized, and the use and consumption of lubricating oil can be saved to the greatest extent.

[0033] Specific implementation method four: Combination Figures 1 to 6 This embodiment is described. The difference between this embodiment and the third embodiment is that a vent hole is processed on the top of the upper box body 4-1, a vent cap 4-2 is provided in the vent hole, and the vent cap 4-2 is detachably connected to the upper box body 4-1. Other components and connection methods are the same as those of the third embodiment.

[0034] In this embodiment, the vent hole is provided in the upper housing 4-1 to discharge the pressure in the housing of the drum gear coupling and prevent the oil return from being blocked.

[0035] Specific implementation method five: Combination Figures 1 to 6 This embodiment is described. The difference between this embodiment and the fourth embodiment is that the middle connection assembly includes two inner gear sleeves 5 and an intermediate shaft outer gear sleeve 7. The two inner gear sleeves 5 are respectively sleeved on both ends of the intermediate shaft outer gear sleeve 7, and the two inner gear sleeves 5 are meshed with the intermediate shaft outer gear sleeve 7. One of the two inner gear sleeves 5 is detachably connected to the input end flange 1, and the other of the two inner gear sleeves 5 is detachably connected to the output end flange 10. Other components and connection methods are the same as those of the fourth embodiment.

[0036] In this embodiment, the intermediate shaft outer gear sleeve 7 in the middle connecting assembly is a floating structure, and the inner gear sleeve 5 and the intermediate shaft outer gear sleeve 7 are radially centered by the outer gear sleeve root circle and the inner gear top circle. When the high-speed drum gear coupling that transmits at high temperature is assembled at room temperature, its matching form is H9 / h7 to avoid eccentricity caused by gaps due to different expansion amounts at high temperatures.

[0037] Specific implementation method six: Combination Figures 1 to 6 This embodiment is described. The difference between this embodiment and the fifth embodiment is that the inner hole of the input end flange 1 and the inner hole of the output end flange 10 are both tapered holes. The other components and connection methods are the same as those of the fifth embodiment.

[0038] In this embodiment, the input end flange 1 and the output end flange 10 are both in interference connection with the connected shaft extension, and hydraulic installation and disassembly are adopted to avoid the disadvantages of insufficient strength and easy loosening caused by key connection, and the appropriate interference has an enhanced effect on the strength of the shaft extension connection. In addition, such a design can also ensure that the coupling can be disassembled without moving the connected machinery, and the hydraulic installation and disassembly also has the advantages of convenient disassembly and no damage to the mating surface.

[0039] Specific implementation method seven: Combination Figures 1 to 6 This embodiment is described. The difference between this embodiment and the sixth embodiment is that two symmetrically arranged annular groove structures are processed on the inner tooth surface of the inner gear sleeve 5, and a retaining ring 6 is installed in each annular groove structure. The other components and connection methods are the same as those of the sixth embodiment.

[0040] Specific implementation method eight: Combination Figures 1 to 6 This embodiment is described. The difference between this embodiment and the seventh embodiment is that the retaining ring 6 is a circular ring structure, a notch is processed at the bottom of the retaining ring 6, a semicircular hook is respectively provided on both sides of the notch, and each semicircular hook is integrally formed with the retaining ring 6. Other components and connection methods are the same as those of the seventh embodiment.

[0041] In combination with the description of specific implementation methods seven and eight, the width of the annular groove structure is 10 mm, which is used to install the retaining ring 6. The material of the retaining ring 6 is 65Mn and the width is 8 mm. The two semicircular structures provided at the notch of the retaining ring 6 are used to clamp the retaining ring during the installation and removal of the retaining ring. The retaining ring 6 is used to limit the axial position of the outer gear sleeve 7 of the intermediate shaft to prevent excessive movement of the shaft system and ensure the safety of the system. The axial compensation capacity of the drum gear coupling is determined by the axial installation clearance between the annular groove of the inner gear sleeve 5 and the retaining ring 6, that is, the difference of 2 mm between the width of the annular groove structure of the inner gear sleeve 5 and the width of the retaining ring 6 is the axial compensation amount of the connection between a single inner gear sleeve and the outer gear sleeve of the intermediate shaft.

[0042] Specific implementation method nine: Combination Figures 1 to 6 This embodiment is described. The difference between this embodiment and the eighth embodiment is that the outer gear sleeve 7 of the intermediate shaft includes a central sleeve and two gear sleeves, the two gear sleeves are respectively sleeved on the two ends of the central sleeve, and the two gear sleeves are formed integrally with the central sleeve. An annular oil collecting groove 7-1 is processed on the end face of each gear sleeve near the middle end of the central sleeve, and a plurality of radial oil inlet holes 7-2 are processed on the toothed surface of each gear sleeve at equal intervals along the circumferential direction, and one end of each radial oil inlet hole 7-2 is connected to the toothed surface of the gear sleeve, and the other end of each radial oil inlet hole 7-2 is connected to the annular oil collecting groove 7-1. Other components and connection methods are the same as those of the eighth embodiment.

[0043] In this embodiment, the number of radial oil inlet holes 7-2 is the same as the number of teeth in the inner gear sleeve 5. In order to ensure the smooth flow of the lubricating oil, the diameter of the radial oil inlet hole 7-2 is not less than 3 mm. The oil outlet end of each injection pipe 4-4 is arranged corresponding to an annular oil collecting groove 7-1. After the lubricating oil is sprayed out through the injection pipe 4-4, it enters the annular oil collecting groove 7-1 and penetrates through the radial oil inlet hole 7-2 to the meshing area between the inner gear sleeve 5 and the outer gear sleeve 7 of the intermediate shaft to lubricate the tooth surfaces on the inner gear sleeve 5 and the outer gear sleeve 7 of the intermediate shaft.

[0044] Specific implementation method ten: Combination Figures 1 to 6 This embodiment is described. The difference between this embodiment and the ninth embodiment is that the tooth surface of the inner gear sleeve 5 and the tooth surface of the intermediate shaft outer gear sleeve 7 are both nitrided. The other components and connection methods are the same as those of the ninth embodiment.

[0045] Such an arrangement can effectively prevent tooth surface adhesion and improve wear resistance.

[0046] The present invention has been disclosed as above with preferred implementation cases, but it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent implementation cases with equivalent changes by using the above-disclosed structures and technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above implementation cases based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

[0047] How it works

[0048] When the present application is in use, the various components are first assembled together according to the connection relationship described in specific embodiments one to ten, and lubricating oil is filled into the two oil injection pipes 4-4 through the pump group on the oil supply tank. The two oil injection pipes 4-4 spray the lubricating oil into the annular oil collecting grooves 7-1 on both sides of the outer gear sleeve 7 of the intermediate shaft respectively. Under the action of centrifugal force, the lubricating oil enters the tooth meshing area of ​​the inner gear sleeve 5 and the outer gear sleeve 7 of the intermediate shaft through multiple radial oil inlet holes 7-2, so that the tooth meshing area is continuously and fully lubricated. Under the action of gravity, the lubricating oil enters the lubricating oil recovery device through the oil drain pipe 4-5, and can re-enter the oil injection pipe 4-4 after treatment, forming efficient and stable circulating lubrication.

Claims

1. A drum gear coupling with oil supply and lubrication function, characterized in that: The drum gear coupling comprises a coupling housing unit and an internal transmission unit of the coupling, wherein the internal transmission unit of the coupling is coaxially inserted in the coupling housing unit, and both ends of the internal transmission unit of the coupling extend to the outside of the coupling housing unit, the input end of the internal transmission unit of the coupling is connected to the power input shaft, and the output end of the internal transmission unit of the coupling is connected to the power output shaft; The internal transmission unit of the coupling comprises an input end flange (1), an output end flange (10) and a middle connection assembly, wherein one end of the input end flange (1) extends to the outside of the coupling housing unit and is connected to the power input shaft, the other end of the input end flange (1) is detachably connected to one end of the middle connection assembly via a plurality of fastening assemblies, one end of the output end flange (10) extends to the outside of the coupling housing unit and is connected to the power output shaft, and the other end of the output end flange (10) is detachably connected to the other end of the middle connection assembly via a plurality of fastening assemblies; The coupling housing unit is provided with an oil supply channel and an oil discharge channel. The lubricating oil enters the coupling housing unit through the oil supply channel, flows through the middle connecting component, and is finally discharged through the oil discharge channel, thereby realizing oil supply and lubrication of the drum gear coupling.

2. The drum gear coupling with oil supply and lubrication function according to claim 1, characterized in that: The coupling housing unit comprises an input end housing connection flange (2), a drum gear coupling housing (4) and an output end housing connection flange (11); the input end housing connection flange (2) is inserted into the input end of the drum gear coupling housing (4), and the outer wall of the input end housing connection flange (2) and the inner wall of the drum gear coupling housing (4) are sealed by two O-type sealing rings (3); the output end housing connection flange (11) is inserted into the output end of the drum gear coupling housing (4), and the outer wall of the output end housing connection flange (11) and the inner wall of the drum gear coupling housing (4) are sealed by another two O-type sealing rings (3).

3. The drum gear coupling with oil supply and lubrication function according to claim 2, characterized in that: The drum gear coupling housing (4) comprises an upper housing (4-1) and a lower housing (4-3), wherein the upper housing (4-1) is buckled on the lower housing (4-3), and the upper housing (4-1) and the lower housing (4-3) are fastened together by a bolt and nut assembly, and two oil injection pipes (4-4) are inserted at the bottom center of the lower housing (4-3), and the oil inlet ends of the two oil injection pipes (4-4) extend to the outside of the lower housing (4-3). -4), the oil outlet end of one of the two oil injection pipes (4-4) is arranged close to the end where the middle connection assembly is connected to the input end flange (1), the oil outlet end of the other of the two oil injection pipes (4-4) is arranged close to the end where the middle connection assembly is connected to the output end flange (10), and an oil drain pipe (4-5) is arranged on the outer edge of the bottom of the lower box body (4-3) in a vertical direction, and the top end of the oil drain pipe (4-5) is connected to the lower box body (4-3).

4. The drum gear coupling with oil supply and lubrication function according to claim 3, characterized in that: A vent hole is processed on the top of the upper box body (4-1), a vent cap (4-2) is arranged in the vent hole, and the vent cap (4-2) is detachably connected to the upper box body (4-1).

5. The drum gear coupling with oil supply and lubrication function according to claim 4, characterized in that: The middle connection component comprises two inner gear sleeves (5) and an intermediate shaft outer gear sleeve (7), the two inner gear sleeves (5) are respectively sleeved on the two ends of the intermediate shaft outer gear sleeve (7), and the two inner gear sleeves (5) are both meshed with the intermediate shaft outer gear sleeve (7), one of the two inner gear sleeves (5) is detachably connected to the input end flange (1), and the other of the two inner gear sleeves (5) is detachably connected to the output end flange (10).

6. The drum gear coupling with oil supply and lubrication function according to claim 5, characterized in that: The inner hole of the input end flange (1) and the inner hole of the output end flange (10) are both tapered holes.

7. The drum gear coupling with oil supply and lubrication function according to claim 6, characterized in that: Two symmetrically arranged annular groove structures are processed on the inner tooth surface of the inner gear sleeve (5), and a retaining ring (6) is installed in each annular groove structure.

8. The drum gear coupling with oil supply and lubrication function according to claim 7, characterized in that: The retaining ring (6) is a circular ring structure. A notch is processed on the bottom of the retaining ring (6). A semicircular hook is respectively arranged on both sides of the notch, and each semicircular hook is integrally formed with the retaining ring (6).

9. The drum gear coupling with oil supply and lubrication function according to claim 8, characterized in that: The outer gear sleeve (7) of the intermediate shaft comprises a central sleeve and two gear sleeves, the two gear sleeves are respectively sleeved on the two ends of the central sleeve, and the two gear sleeves are formed integrally with the central sleeve, an annular oil collecting groove (7-1) is machined on the end surface of each gear sleeve close to the middle of the central sleeve, a plurality of radial oil inlet holes (7-2) are machined on the toothed surface of each gear sleeve at equal intervals along the circumferential direction, one end of each radial oil inlet hole (7-2) is connected to the toothed surface of the gear sleeve, and the other end of each radial oil inlet hole (7-2) is connected to the annular oil collecting groove (7-1).

10. The drum gear coupling with oil supply and lubrication function according to claim 9, characterized in that: The tooth surface of the inner gear sleeve (5) and the tooth surface of the intermediate shaft outer gear sleeve (7) are both nitrided.

Images