Reinforced tractor driving half shaft

Abstract

The utility model relates to the technical field of half shafts, in particular to a reinforced tractor driving half shaft which comprises a speed reducer shell and an oil seal fixedly embedded in the speed reducer shell, a first shaft column is rotatably inserted in an inner cavity of the oil seal, and the front end of the first shaft column extends into the inner cavity of the speed reducer shell and is fixedly connected with a third shaft column. A plurality of splines are arranged on the circumference of the outer wall of the third shaft column, a second shaft column is arranged at the rear end of the first shaft column, a first flange is arranged at the rear end of the second shaft column, a reinforcing assembly is arranged on the rear side of the first flange, and a second flange is arranged at the rear end of the reinforcing assembly. The heat dissipation effect is improved, the situation that the service life of the spline is shortened due to the fact that the temperature of the spline is too high due to friction generated in the running process is avoided, and the problems that in the prior art, a half shaft does not have the heat dissipation function on the spline, and the service life of the spline is affected due to the fact that a large amount of heat is generated due to friction when the spline runs for a long time are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of half shafts, in particular to a reinforced tractor driving half shaft. Background Art

[0002] A driver shaft (also called a CVJ, or constant velocity joint) connects the differential to the drive wheels. It transmits torque between the transmission's speed reducer and the drive wheels. Each shaft has a universal joint (U / JOINT) at its inner and outer ends, connecting to the speed reducer gear and the inner ring of the wheel hub bearing via splines.

[0003] The utility model application number CN202321684048.X relates to the technical field of tractor drive axles. Specifically, it discloses a reinforced tractor drive axle, comprising a drive axle having a flange connected to one end and a splined portion provided at the other end. A rotating thread is provided on the outer surface of the drive axle, located on one side of the splined portion. The outer surface of the drive axle is also provided with an anti-collision mechanism. If the drive axle encounters a stone while the tractor is working, multiple hard sponges provided on the outer surface of the drive axle and springs provided inside the hard sponges prevent direct contact between the drive axle and the stone, ensuring a certain rebound reaction. This, to a certain extent, reduces the risk of serious stone collisions with the drive axle, thereby enhancing the stability and safety of the tractor during travel.

[0004] However, the above patent still has the following problems in actual use:

[0005] 1. The sponge is fixed to the half-shaft through the mounting seat and the assembly rotating parts, which has a complex structure, increases the complexity of the half-shaft production process, and prolongs the processing time of the half-shaft;

[0006] 2. It does not have the heat dissipation function for the spline. The spline will generate a lot of heat due to friction when running for a long time, which will affect the service life of the spline;

[0007] 3. The flange does not have a reinforcement structure, and the bolts passing through the through holes on the flange and connecting to the hub may become loose due to vibration;

[0008] In view of the above problems, a reinforced tractor drive half shaft is provided. Utility Model Content

[0009] The purpose of the utility model is to provide a reinforced tractor drive half shaft to solve the problems raised in the above background technology.

[0010] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a reinforced tractor drive half shaft, comprising a reducer housing and an oil seal fixedly embedded in the reducer housing, the inner cavity of the oil seal being rotatably plugged with a first shaft column, the front end of the first shaft column extending to the inner cavity of the reducer housing and fixedly connected to a third shaft column, the outer wall circumference of the third shaft column being provided with a plurality of splines, the rear end of the first shaft column being provided with a second shaft column, the rear end of the second shaft column being provided with a first flange, the rear side of the first flange being provided with a reinforcement component, the rear end of the reinforcement component being provided with a second flange, the outer wall of the first shaft column being provided with a protective component, and the inner cavity of the reducer housing being provided with a heat dissipation component.

[0011] Preferably, the protective component includes an adhesive layer, a sponge sleeve and a rubber sleeve, the adhesive layer is coated on the outer wall circumference of the first shaft column, the sponge sleeve is sleeved on the outside of the adhesive layer, and the rubber sleeve is fixedly sleeved on the outside of the sponge sleeve by glue.

[0012] Preferably, the reinforcement assembly includes a spring, a guide rod and a limit plate, the spring is arranged between the first flange and the second flange, the guide rod can be slidably inserted into the first flange and fixedly connected to the outer wall of the second flange, and the limit plate is arranged at the end of the guide rod away from the second flange.

[0013] Preferably, the first flange and the second flange are both provided with through holes equidistantly along the axial direction for bolts to pass through.

[0014] Preferably, the heat dissipation assembly includes a drive assembly and fan blades. The drive assembly is arranged in the inner cavity of the reducer housing and fixedly sleeved on the outer wall of the first shaft column. The plurality of fan blades are arranged on the drive assembly.

[0015] Preferably, the driving assembly includes a driving gear, two rotating columns and two driven gears, the driving gear is fixedly sleeved on the outer wall of the first shaft column, the two rotating columns are rotatably connected to the rear side of the inner cavity of the reducer housing through bearings, the two driven gears are respectively fixedly sleeved on the outer walls of the two rotating columns, the outer walls of the rotating columns are respectively fixedly connected to a plurality of fan blades, and the driving gear is meshed with the two driven gears.

[0016] Preferably, the outer wall of the reducer housing is provided with a plurality of heat dissipation fins, the heat dissipation fins are copper sheets, the top ends of the heat dissipation fins extend to the inner cavity of the reducer housing, and the bottom ends of the heat dissipation fins extend to the outside of the reducer housing.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. During the driving of the tractor, since the reducer housing remains stationary and the first shaft column is in a rotating state, the driving gear can drive the driven gear, the rotating column and the fan blades to rotate, stirring the oil inside the reducer housing, thereby increasing the flow speed of the oil and accelerating the heat dissipation effect. Through the setting of the heat dissipation fins, heat exchange can be carried out with the oil and air at the same time, which can accelerate the reduction of the oil temperature, further improve the heat dissipation effect, and avoid the spline from being overheated and shortening its service life due to friction generated during operation. This solves the problem in the prior art that the half shaft does not have the heat dissipation function for the spline, and the spline will generate a lot of heat due to friction when running for a long time, which affects the service life of the spline.

[0019] 2. The sponge sleeve is pasted on the outside of the first shaft column through the adhesive layer, which can prevent stones and the like from damaging the first shaft column, thereby extending the service life of the first shaft column. The installation is convenient and quick, and there is no cumbersome mechanical mechanism. It solves the problem in the prior art that the sponge is fixed on the half-shaft through the mounting seat and the assembly rotating parts, which has a complex structure, increases the complexity of the process during the production of the half-shaft, and prolongs the processing time of the half-shaft.

[0020] 3. Through the setting of the spring, when the wheel hub is installed on the half-shaft through the bolt, the first flange and the second flange can squeeze the spring, thereby causing the spring to produce corresponding elastic deformation, and then generate corresponding elastic force. Under the action of the elastic force of the spring, there can be a force acting in opposite directions between the first flange and the second flange, thereby making the contact between the outer wall thread of the bolt and the internal thread on the wheel hub closer and the pressure greater, thereby increasing the friction between the two threads, improving the fastening effect, and solving the problem that the flange in the prior art does not have a reinforcement structure, and the bolt will become loose due to vibration when passing through the through hole on the flange and connecting with the wheel hub. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0022] Figure 2 It is a rear view of the utility model;

[0023] Figure 3 This is a schematic structural diagram of the heat dissipation component of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the reinforcement component of the utility model;

[0025] Figure 5 This is a front sectional view of the buffer assembly of the present invention.

[0026] In the figure: 1. Reducer housing; 2. Oil seal; 3. First shaft column; 4. Second shaft column; 5. First flange; 6. Second flange; 7. Heat dissipation fin; 8. Third shaft column; 9. Spline; 10. Driving gear; 11. Rotating column; 12. Driven gear; 13. Fan blade; 14. Spring; 15. Guide rod; 16. Limit plate; 17. Adhesive layer; 18. Sponge sleeve; 19. Rubber sleeve; 20. Through hole. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0028] See also Figures 1 to 5 The utility model provides a technical solution: a reinforced tractor drive half shaft, comprising a reducer housing 1 and an oil seal 2 fixedly embedded in the reducer housing 1. Through the setting of the oil seal 2, the connection between the first shaft column 3 and the reducer housing 1 can be achieved, and the sealing of the reducer housing 1 can be maintained to avoid leakage of oil in the inner cavity of the reducer housing 1. The inner cavity of the oil seal 2 is rotatably plugged with the first shaft column 3. The front end of the first shaft column 3 extends to the inner cavity of the reducer housing 1 and is fixedly connected to the third shaft column 8. The outer wall circumference of the third shaft column 8 is provided with a plurality of splines 9. Through the setting of the splines 9, the reduction gear in the reducer can be engaged with the splines 9, so that the third shaft column 8 drives the first shaft column 3, the second shaft column 4, the first flange 5, the second flange 6 and the wheel hub to rotate, thereby achieving the purpose of driving the tractor to travel.

[0029] A second shaft column 4 is provided at the rear end of the first shaft column 3, and a first flange 5 is provided at the rear end of the second shaft column 4. A reinforcement component is provided on the rear side of the first flange 5. Through the setting of the reinforcement component, the contact between the outer wall thread of the bolt and the internal thread on the wheel hub is made closer and the pressure is greater, thereby increasing the friction between the two threads, improving the fastening effect, and solving the problem that the flange in the prior art does not have a reinforcement structure, and the bolt will become loose due to vibration when passing through the through hole 20 on the flange and connected to the wheel hub.

[0030] A second flange 6 is provided at the rear end of the reinforcement component, and a protective component is provided on the outer wall of the first shaft column 3. By setting the protective component, the service life of the first shaft column 3 can be extended. The installation is convenient and quick, and there is no cumbersome mechanical mechanism. It solves the problem in the prior art that the sponge is fixed on the half-shaft through a mounting seat and a rotating assembly, which has a complex structure, increases the complexity of the process of the half-shaft during production, and prolongs the processing time of the half-shaft.

[0031] The inner cavity of the reducer housing 1 is provided with a heat dissipation component. Through the setting of the heat dissipation component, the heat dissipation effect is improved, and the spline 9 is prevented from having too high a temperature and shortening its service life due to friction generated during operation. This solves the problem in the prior art that the half-shaft does not have the heat dissipation function for the spline 9, and the spline 9 will generate a large amount of heat due to friction when running for a long time, affecting the service life of the spline 9.

[0032] In this embodiment, the protective component includes an adhesive layer 17, a sponge sleeve 18 and a rubber sleeve 19. The adhesive layer 17 is coated on the outer wall circumference of the first shaft column 3. The sponge sleeve 18 is adhered to the outside of the first shaft column 3 through the adhesive layer 17, which can prevent stones and the like from damaging the first shaft column 3, thereby extending the service life of the first shaft column 3. The installation is convenient and quick, without cumbersome mechanical mechanisms, and solves the problem in the prior art that the sponge is fixed to the half-shaft through a mounting seat and a rotating assembly, which has a complex structure, increases the complexity of the process of the half-shaft during production, and prolongs the processing time of the half-shaft.

[0033] The sponge sleeve 18 is sleeved on the outside of the adhesive layer 17. The sponge sleeve 18 can be protected by the setting of the rubber sleeve 19 to extend the service life of the sponge sleeve 18. The rubber sleeve 19 is fixedly sleeved on the outside of the sponge sleeve 18 by glue.

[0034] In this embodiment, the reinforcement assembly includes a spring 14, a guide rod 15 and a limit plate 16. The spring 14 is arranged between the first flange 5 and the second flange 6. Through the arrangement of the spring 14, the first flange 5 and the second flange 6 can squeeze the spring 14 when the wheel hub is installed on the half-shaft by bolts, thereby causing the spring 14 to produce corresponding elastic deformation, and then generate corresponding elastic force. Under the elastic force of the spring 14, there can be a mutual force between the first flange 5 and the second flange 6, thereby making the contact between the outer wall thread of the bolt and the internal thread on the wheel hub closer and the pressure greater, thereby increasing the friction between the two threads, improving the fastening effect, and solving the problem that the flange in the prior art does not have a reinforcement structure and the bolts will become loose due to vibration when passing through the through hole 20 on the flange and connected to the wheel hub.

[0035] The guide rod 15 is slidably inserted into the first flange 5 and fixedly connected to the outer wall of the second flange 6. The limit plate 16 is arranged at the end of the guide rod 15 away from the second flange 6. Through the setting of the guide rod 15, the first flange 5 and the second flange 6 can be prevented from always maintaining the same central axis, and the through holes 20 on the first flange 5 and the second flange 6 can be prevented from being misaligned, thereby improving the stability of the device during use. Through the setting of the limit plate 16, the guide rod 15 can be prevented from separating from the first flange 5, thereby improving the stability of the reinforcement assembly.

[0036] In this embodiment, both the first flange 5 and the second flange 6 are provided with through holes 20 equidistantly along the axial direction for the bolts to pass through.

[0037] In this embodiment, the heat dissipation assembly includes a drive assembly and fan blades 13. The drive assembly is arranged in the inner cavity of the reducer housing 1 and fixedly sleeved on the outer wall of the first shaft column 3. Multiple fan blades 13 are arranged on the drive assembly.

[0038] In this embodiment, the driving assembly includes a driving gear 10, two rotating columns 11 and two driven gears 12. The driving gear 10 is fixedly sleeved on the outer wall of the first shaft column 3. The connection between the driving gear 10 and the first shaft column 3 is an interference fit, so that when the first shaft column 3 rotates, the driving gear 10 is driven to rotate. The two rotating columns 11 are rotatably connected to the rear side of the inner cavity of the reducer housing 1 through bearings. The outer ring of the bearing is fixed to the rear side of the inner cavity of the reducer housing 1 through fasteners. One end of the two rotating columns 11 is respectively interference fit on the inner rings of the two bearings. The two driven gears 12 are respectively fixedly sleeved on the outer walls of the two rotating columns 11. The outer walls of the rotating columns 11 are respectively fixedly connected to a plurality of fan blades 13. The fan blades 13 are connected to the outer wall of the rotating column 11 through fasteners. When the rotating column 11 rotates, the fan blades 13 are driven to rotate. The fan blades 13 are inclined at a certain angle, and when they rotate, vortices are generated to cause the oil to flow.

[0039] In this embodiment, the driving gear 10 is meshed with the two driven gears 12, so that when the driving gear 10 rotates, the two driven gears 12 are driven to rotate the rotating column 11 and the fan blades 13. The number of teeth of the driving gear 10 is 2-3 times that of the driven gear 12, which can make the rotation speed of the driven gear 12 greater than that of the driving gear 10, greatly improving the flow rate of the oil.

[0040] In this embodiment, the outer wall of the reducer housing 1 is provided with a plurality of heat dissipating fins 7, which are copper sheets. The top ends of the heat dissipating fins 7 extend to the inner cavity of the reducer housing 1, and the bottom ends of the heat dissipating fins 7 extend to the outside of the reducer housing 1. Through the setting of the heat dissipating fins 7, heat exchange can be carried out simultaneously with the oil and air, which can accelerate the reduction of the oil temperature and further improve the heat dissipation effect. The heat dissipating fins 7 are copper sheets, and the heat exchange efficiency of the copper sheets is high, which can improve the heat dissipation effect.

[0041] The working process of this utility model is as follows:

[0042] During the driving of the tractor, since the reducer housing 1 remains stationary and the first shaft column 3 is in a rotating state, the first shaft column 3 drives the driving gear 10 to rotate. Since the driving gear 10 is engaged with the two driven gears 12, when the driving gear 10 rotates, the two driven gears 12 can respectively drive the two rotating columns 11 and the fan blades 13 to rotate, stirring the oil inside the reducer housing 1, thereby increasing the flow rate of the oil and accelerating the heat dissipation effect. Through the setting of the heat dissipation fins 7, heat exchange can be carried out with the oil and air at the same time, which can accelerate the reduction of the oil temperature, further improve the heat dissipation effect, and avoid the spline 9 from being too hot and shortening its service life due to friction generated during operation. This solves the problem in the prior art that the half shaft does not have the heat dissipation function for the spline 9, and the spline 9 will generate a lot of heat due to friction when running for a long time, affecting the service life of the spline 9.

[0043] The sponge sleeve 18 is adhered to the outside of the first shaft column 3 through the adhesive layer 17, which can prevent stones and the like from damaging the first shaft column 3, thereby extending the service life of the first shaft column 3. The installation is convenient and quick, and there is no cumbersome mechanical mechanism. It solves the problem in the prior art that the sponge is fixed to the half-shaft through a mounting seat and a rotating assembly, which has a complex structure, increases the complexity of the process during the production of the half-shaft, and extends the processing time of the half-shaft. By setting the rubber sleeve 19, the sponge sleeve 18 can be protected and the service life of the sponge sleeve 18 can be extended.

[0044] By setting the spring 14, the first flange 5 and the second flange 6 can be squeezed by the spring 14 when the wheel hub is installed on the half-shaft by the bolt, thereby causing the spring 14 to produce corresponding elastic deformation and then generate corresponding elastic force. Under the elastic force of the spring 14, there can be a force in the opposite direction between the first flange 5 and the second flange 6, thereby making the contact between the outer wall thread of the bolt and the internal thread on the wheel hub closer and the pressure greater, thereby increasing the friction between the two threads, improving the fastening effect, and solving the problem that the flange in the prior art does not have a reinforcement structure and the bolt will become loose when it passes through the through hole 20 on the flange and is connected to the wheel hub due to vibration. By setting the guide rod 15, the first flange 5 and the second flange 6 can be prevented from always being on the same central axis, and the through holes 20 on the first flange 5 and the second flange 6 can be prevented from being misaligned, thereby improving the stability of the device during use.

[0045] The above shows and describes the basic principles, main features, and advantages of the present invention. Persons skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A reinforced tractor drive half shaft, comprising a reducer housing (1) and an oil seal (2) fixedly embedded in the reducer housing (1), characterized in that: The inner cavity of the oil seal (2) is rotatably plugged with a first shaft column (3), the front end of the first shaft column (3) extends to the inner cavity of the reducer housing (1) and is fixedly connected to a third shaft column (8), the outer wall circumference of the third shaft column (8) is provided with a plurality of splines (9), the rear end of the first shaft column (3) is provided with a second shaft column (4), the rear end of the second shaft column (4) is provided with a first flange (5), the rear side of the first flange (5) is provided with a reinforcement component, the rear end of the reinforcement component is provided with a second flange (6), the outer wall of the first shaft column (3) is provided with a protective component, and the inner cavity of the reducer housing (1) is provided with a heat dissipation component.

2. The reinforced tractor drive half shaft according to claim 1, characterized in that: The protective component comprises an adhesive layer (17), a sponge sleeve (18) and a rubber sleeve (19), wherein the adhesive layer (17) is coated on the outer wall circumference of the first shaft column (3), the sponge sleeve (18) is sleeved on the outside of the adhesive layer (17), and the rubber sleeve (19) is fixedly sleeved on the outside of the sponge sleeve (18) by glue.

3. The reinforced tractor drive half shaft according to claim 1, characterized in that: The reinforcement assembly includes a spring (14), a guide rod (15) and a limit plate (16), wherein the spring (14) is arranged between the first flange (5) and the second flange (6), the guide rod (15) is slidably plugged into the first flange (5) and fixedly connected to the outer wall of the second flange (6), and the limit plate (16) is arranged at one end of the guide rod (15) away from the second flange (6).

4. The reinforced tractor drive half shaft according to claim 1, characterized in that: The first flange (5) and the second flange (6) are both provided with through holes (20) at equal distances along the axial direction for bolts to pass through.

5. The reinforced tractor drive half shaft according to claim 1, characterized in that: The heat dissipation component includes a drive component and fan blades (13). The drive component is arranged in the inner cavity of the reducer housing (1) and fixedly sleeved on the outer wall of the first shaft column (3). A plurality of fan blades (13) are arranged on the drive component.

6. The reinforced tractor drive half shaft according to claim 5, characterized in that: The driving assembly includes a driving gear (10), two rotating columns (11) and two driven gears (12), wherein the driving gear (10) is fixedly sleeved on the outer wall of the first shaft column (3), and the two rotating columns (11) are rotatably connected to the rear side of the inner cavity of the reducer housing (1) through bearings, and the two driven gears (12) are respectively fixedly sleeved on the outer walls of the two rotating columns (11), and the outer walls of the rotating columns (11) are respectively fixedly connected to a plurality of fan blades (13), and the driving gear (10) and the two driven gears (12) are meshed.

7. The reinforced tractor drive half shaft according to claim 1, characterized in that: The outer wall of the reducer housing (1) is provided with a plurality of heat dissipation fins (7), the heat dissipation fins (7) are copper sheets, the top ends of the heat dissipation fins (7) extend to the inner cavity of the reducer housing (1), and the bottom ends of the heat dissipation fins (7) extend to the outside of the reducer housing (1).

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