CN213973466U

CN213973466U - High-reliability high-speed electric motorcycle rear axle for electric tricycle

Info

Publication number: CN213973466U
Application number: CN202022465488.9U
Authority: CN
Inventors: 王钱; 马光; 李召勤
Original assignee: Jiangsu Jinpeng Group Co Ltd
Current assignee: Jiangsu Jinpeng Group Co Ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-08-17
Anticipated expiration: 2030-10-30

Abstract

The utility model relates to a vehicle chassis traveling system technical field specifically is a high reliable high-speed electricity rear axle that rubs for electric tricycle. Including low alloying brake drum, split type self-locking nut, high-speed pure antifriction bearing, roll operation formula brake disc assembly, whole shaping lightweight axle housing, high strength semi-axis, the electricity gearbox of rubbing, the electricity both ends of gearbox of rubbing connect the high strength semi-axis, the outside of high strength semi-axis is whole shaping lightweight axle housing, low alloying brake drum is connected to the other end of high strength semi-axis, low alloying brake drum connects roll operation formula brake disc assembly. The utility model has the advantages that: the hardness and the strength performance of the material of the brake drum are effectively improved, and the heat resistance of the brake drum can be improved; the whole forming lightweight axle housing has no welding seam, the weight is lightened by more than 10% compared with the stamping and welding axle housing, the strength performance is improved by more than 20% compared with the stamping and welding axle housing, the diameter of the half shaft is thickened, and meanwhile, the rectangular key structure is adopted, so that the anti-torque strength of the half shaft is improved.

Description

High-reliability high-speed electric motorcycle rear axle for electric tricycle

Technical Field

The utility model relates to a vehicle chassis traveling system technical field specifically is a high reliable high-speed electricity rear axle that rubs for electric tricycle.

Background

The existing rear axle is one of the main components of the electric tricycle, is arranged at the rear part of the electric tricycle, and supports a tricycle body through a suspension system; wheels are mounted at both ends for transmitting forces and moments acting between the wheels and the frame. In recent years, relevant laws and regulations of electric vehicles are continuously perfected, requirements of users on products are higher and higher, and optimization is urgently needed in the existing rear axle state.

The conventional brake drum is made of HT200 material, and is easy to fail prematurely due to overlarge load under the frequent action of strong pressure of brake shoe components and huge static or dynamic friction force between the brake shoe components, so that the brake drum has great harm to the braking performance and safety of a vehicle; the principle of the existing locknut is that special engineering plastics are permanently attached to threads, so that the engineering plastics are extruded to generate strong reaction force in the process of tightening the inner threads and the outer threads, thereby increasing the friction force between the inner threads and the outer threads, but the locknut with the structure fails after being repeatedly disassembled for 5 times; the existing bearing is a semi-rolling body which works under the restraint of a retainer and the lubrication state of grease, and the existing bearing has to ensure that the oil is not poor or lost when in work, and because the retainer generates huge sliding friction resistance to do useless work when the bearing moves at high speed, the reliability and the service life of the bearing cannot be ensured when the bearing moves at high speed; most of the existing brake disc assemblies use asbestos organic friction materials, and asbestos and high-temperature volatile matters are carcinogens; in addition, along with the gradual increase of the vehicle speed, the surface temperature of the brake shoe block can reach 300-500 ℃, the asbestos friction material has poor heat conductivity and heat resistance, crystal water is lost at about 400 ℃, the crystal water is completely lost at 550 ℃, the enhancement effect is basically lost, the friction is unstable after the asbestos is dehydrated, the material of a working layer is deteriorated, the abrasion is intensified, the obvious phenomenon of 'heat fading' occurs, and the asbestos organic friction material is obviously not suitable for the development requirements of the modern society; the existing axle housing adopts a stamping welding process, so that the lightweight design is difficult to realize; most of the existing half shafts are made of 45 steel, and the mechanical properties such as strength, hardness, impact toughness and the like after treatment are obviously poorer than 40 Cr; in addition, the existing half shaft mostly adopts an 18-tooth structure, and the anti-torque strength is obviously insufficient when the half shaft moves at high speed; the modulus of a large gear of the existing gearbox is generally 1.75mm, the speed ratio is generally 1:10, the bearing capacity is obviously insufficient, the rotating speed of a motor needs to be as high as 5400r/min to meet the requirement that the speed of the motor is more than or equal to 50km/h, the motor is easy to overheat, and the noise is also larger.

Disclosure of Invention

In order to overcome the weak point of above-mentioned prior art, the utility model provides a high reliable high-speed electricity rear axle that rubs for electric tricycle satisfies user's load, the actual demand of climbing.

The utility model discloses a realize through following technical scheme: the utility model provides a high reliable high speed electricity rear axle that rubs for electric tricycle which characterized in that: including low alloying brake drum, split type self-locking nut, high-speed pure antifriction bearing, roll operation formula brake disc assembly, whole shaping lightweight axle housing, high strength semi-axis, the electricity gearbox of rubbing, the electricity both ends of gearbox of rubbing connect the high strength semi-axis, the outside of high strength semi-axis is whole shaping lightweight axle housing, low alloying brake drum is connected to the other end of high strength semi-axis, low alloying brake drum connects roll operation formula brake disc assembly.

The split self-locking nut comprises a concave cone nut and a convex cone nut, and the concave cone nut and the convex cone nut are designed by Morse taper.

The high-speed pure rolling bearing takes an inner ring, an outer ring and a main rolling body as a basic component and a main power transmission component, an independent bearing bracket is formed by an auxiliary rolling body and positioning rings at two ends to replace a retainer used by a conventional bearing, and sliding friction does not exist among the inner ring, the outer ring and the main rolling body; the inner ring, the outer ring, the main rolling body and the auxiliary rolling body are made of nano and rare earth ceramic materials, and are sprayed and sintered to form the wear-resistant layer.

The rolling control type brake disc assembly comprises a brake shoe assembly, a brake lining, a brake shoe frame, a rolling body and a rocker shaft, wherein the brake lining is made of powder metallurgy materials, the brake lining and the brake shoe frame are integrated through pressure sintering, and a rolling friction structure is adopted between the rocker shaft and the brake shoe assembly.

The integrally-formed lightweight axle housing is in an equal-strength beam state, and a half body area, a connecting flange and a rectangular pipe area of the integrally-formed lightweight axle housing are integrally formed without welding seams.

The high-strength half shaft is made of 40Cr materials, an integral hardening and tempering process is adopted, and high-frequency quenching treatment is carried out on the spline; the high-strength half shaft is thickened in diameter and adopts a rectangular key structure.

The electric friction gearbox adopts an all-aluminum shell, the modulus of a large gear is more than or equal to 2mm, the tooth width of a meshing gear is synchronously widened, the tooth width of mutually meshed small gears is larger than that of the large gear, and the optimal transmission ratio is matched.

The low-alloying brake drum is prepared by adjusting C, Si amount and adding Cr and Cu alloy elements for low-alloying treatment on the basis of the material composition of a common HT200 brake drum.

The utility model has the advantages that: the hardness and the strength of the material of the brake drum are effectively improved, and the heat resistance of the brake drum can be improved, so that the service life of the brake drum is prolonged; the contact area between the brake shoe assembly and the brake drum is increased, so that the braking effect is effectively improved; the split self-locking nut has the advantages of reasonable and simple structure, good anti-loosening performance, low production cost, convenient installation and repeated use; the high-speed pure rolling bearing removes a retainer used by a conventional bearing, eliminates the sliding friction of the retainer without work, and has the advantages of small resistance, high limit speed, large load, good reliability, small loss, low noise, long service life and the like; the bearing capacity of the bearing is effectively improved by increasing the specification of the bearing; the rolling control type brake disc assembly does not generate slag when in motion, overcomes the harsh noise in the braking process, simultaneously improves the stability and the thermal stability of the friction coefficient, and ensures the braking distance and the braking safety and stability when the vehicle encounters an emergency in operation; the brake lining and the brake shoe frame are integrated through pressure sintering, so that the strength of the brake shoe assembly is effectively enhanced; the rolling body is made of bearing steel, has certain toughness, corrosion resistance, good dimensional stability and manufacturability besides higher compressive strength, contact fatigue strength and wear resistance, and optimizes the sliding friction between the rocker shaft and the brake shoe assembly into rolling friction, thereby realizing flexible braking and improving the operating comfort; the integrally-formed lightweight axle housing is in an equal-strength beam state, the half body area, the connecting flange and the rectangular pipe area are integrally formed, no welding seam exists, the weight is reduced by more than 10% compared with that of a stamping and welding axle housing, the strength performance is improved by more than 20% compared with that of the stamping and welding axle housing, and the vertical bending static strength of the axle housing is not lower than 30 kN; the high-strength half shaft is made of 40Cr material, and can obtain certain toughness, plasticity and wear resistance after proper heat treatment; through thickening the semi-axis diameter, adopt rectangle key structure simultaneously, improved the moment of torsion intensity of semi-axis.

Drawings

The invention will be further explained below with reference to the drawings and examples.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the split self-locking nut of the present invention;

FIG. 3 is a schematic structural view of a roll-operated brake disc assembly according to the present invention;

FIG. 4 is a schematic structural view of the integrally formed lightweight axle housing of the present invention;

fig. 5 is a schematic diagram of the high-strength half-axle structure of the present invention.

In the figure: 1. a low-alloying brake drum; 2. a split self-locking nut; 3. high speed pure rolling bearings; 4. a roll-operated brake disc assembly; 5. integrally forming a lightweight axle housing; 6. a high strength half shaft; 7. an electric motorcycle gearbox; 8. a concave cone nut; 9. a convex cone nut; 10. a brake shoe assembly; 11. a brake lining; 12. a brake shoe frame; 13. a rolling body; 14. a rocker shaft; 15. a semi-body region; 16. a connecting flange; 17. a rectangular tube zone; 18. a rectangular key.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, but the present invention is not limited to these embodiments, and any modifications or substitutions in the basic spirit of the embodiments will still fall within the scope of the present invention as claimed.

As shown in figure 1, the high-reliability high-speed electric motorcycle rear axle for the electric tricycle is characterized in that: including low alloying brake drum 1, split type self-locking nut 2, high-speed pure antifriction bearing 3, rolling operation formula brake disc assembly 4, whole shaping lightweight axle housing 5, high strength semi-axis 6, the electricity gearbox 7 that rubs, the electricity both ends of gearbox 7 that rub connect high strength semi-axis 6, high strength semi-axis 6's outside is whole shaping lightweight axle housing 5, low alloying brake drum 1 is connected to high strength semi-axis 6's the other end, low alloying brake drum 1 connects rolling operation formula brake disc assembly 4.

The split type self-locking nut 2 comprises a concave cone nut 8 and a convex cone nut 9, and the concave cone nut 8 and the convex cone nut 9 are designed by Morse taper.

The high-speed pure rolling bearing 3 takes an inner ring, an outer ring and a main rolling body as a basic component and a main power transmission component, an independent bearing bracket is formed by an auxiliary rolling body and positioning rings at two ends to replace a retainer used by a conventional bearing, and no sliding friction exists among the inner ring, the outer ring and the main rolling body; the inner ring, the outer ring, the main rolling body and the auxiliary rolling body are made of nano and rare earth ceramic materials, and are sprayed and sintered to form the wear-resistant layer.

The rolling control type brake disc assembly 4 comprises a brake shoe assembly 10, a brake lining 11, a brake shoe frame 12, a rolling body 13 and a rocker arm shaft 14, wherein the brake lining 11 is made of powder metallurgy materials, the brake lining 11 and the brake shoe frame 12 are integrated through pressure sintering, and a rolling friction structure is adopted between the rocker arm shaft 14 and the brake shoe assembly 10, so that flexible braking is realized, and the control comfort is improved.

The integrally-formed lightweight axle housing 5 is in an equal-strength beam state, the half-body area 15, the connecting flange 16 and the rectangular pipe area 17 of the integrally-formed lightweight axle housing 5 are integrally formed, no welding seam exists, the weight is reduced by more than 10% compared with that of a stamping and welding axle housing, the strength performance is improved by more than 20% compared with that of the stamping and welding axle housing, and the vertical bending static strength of the axle housing is not lower than 30 kN.

The high-strength half shaft 6 is made of 40Cr materials, an integral hardening and tempering process is adopted, and high-frequency quenching treatment is carried out on the spline; the diameter of the high-strength half shaft 6 is thickened, and the rectangular key 18 structure is adopted, so that the torque resistance strength of the half shaft is improved.

The electric friction gearbox 7 adopts an all-aluminum shell, the modulus of a large gear is more than or equal to 2mm, the tooth width of a meshing gear is synchronously widened, the tooth width of mutually meshed small gears is larger than that of the large gear, and the optimal transmission ratio is matched. The transmission efficiency exceeds 96 percent, the maximum vehicle speed is more than or equal to 50km/h, the actual requirements of a user on load, climbing and the like can be met while the regulatory requirements are met, the maintenance cost is low, and the reliability is higher.

The low-alloying brake drum 1 is prepared by adjusting C, Si amount and adding Cr and Cu alloy elements for low-alloying treatment on the basis of the material composition of a common HT200 brake drum.

Claims

1. The utility model provides a high reliable high speed electricity rear axle that rubs for electric tricycle which characterized in that: including low alloying brake drum (1), split type self-locking nut (2), high-speed pure antifriction bearing (3), roll control formula brake disc assembly (4), integrated into one piece lightweight axle housing (5), high strength semi-axis (6), electricity friction gearbox (7), the electricity both ends of friction gearbox (7) connect high strength semi-axis (6), the outside of high strength semi-axis (6) is integrated into one piece lightweight axle housing (5), low alloying brake drum (1) is connected to the other end of high strength semi-axis (6), roll control formula brake disc assembly (4) is connected in low alloying brake drum (1).

2. The high-reliability high-speed electric motorcycle rear axle for the electric tricycle of claim 1, wherein: the split type self-locking nut (2) comprises a concave cone nut (8) and a convex cone nut (9), and the concave cone nut (8) and the convex cone nut (9) are designed by Morse taper.

3. The high-reliability high-speed electric motorcycle rear axle for the electric tricycle of claim 1, wherein: the rolling control type brake disc assembly (4) comprises a brake shoe assembly (10), a brake lining (11), a brake shoe frame (12), a rolling body (13) and a rocker shaft (14), wherein the brake lining (11) is made of powder metallurgy materials, the brake lining (11) and the brake shoe frame (12) are integrated through pressurization sintering, and a rolling friction structure is adopted between the rocker shaft (14) and the brake shoe assembly (10).

4. The high-reliability high-speed electric motorcycle rear axle for the electric tricycle of claim 1, wherein: the integrally-formed lightweight axle housing (5) is in an equal-strength beam state, and a half body area (15), a connecting flange (16) and a rectangular pipe area (17) of the integrally-formed lightweight axle housing (5) are integrally formed without welding seams.

5. The high-reliability high-speed electric motorcycle rear axle for the electric tricycle of claim 1, wherein: the high-strength half shaft (6) is made of 40Cr materials, an integral hardening and tempering process is adopted, and high-frequency quenching treatment is carried out on the spline; the high-strength half shaft (6) is thickened in diameter and adopts a rectangular key (18) structure.