Electric tricycle power unit

Abstract

The utility model provides an electric tricycle power unit, include: power unit main part, the upper surface fixed connection of power unit main part has motor coupling flange, the upper surface fixed connection of motor coupling flane has motor, the output fixed connection of motor has primary reduction cylindrical pinion, the outer surface engagement connection of primary reduction cylindrical pinion has primary reduction cylindrical gear, the inner wall fixed connection of primary reduction cylindrical gear has secondary reduction spiral bevel pinion through connecting rod, change the installation direction of motor with a group of spiral bevel gears, make motor installation direction rotate 90 DEG, parallel arrangement along the vehicle central axis, avoid two motor installation interference, use a group of cylindrical gear reduction before spiral bevel gear, balance two groups of gear reduction ratio, reduce spiral bevel gear set work intensity, and reduce the tooth number and diameter of two groups of reduction gear gear, be favorable to increase the height of car from the ground.

Description

Technical Field

[0001] This utility model relates to the field of electric tricycle technology, and in particular to the power unit of electric tricycles. Background Technology

[0002] In the field of electric tricycles, dual-motor power units are widely used in heavy-duty or complex road conditions due to their ability to provide stronger power. However, in existing technologies, the drive motors are relatively large in size, have relatively high speeds, and require a large speed ratio. The motors and planetary reduction mechanisms occupy a significant amount of space. Dual motors are often arranged perpendicular to the vehicle's centerline, but the mounting space under the frame is limited. In addition, the relatively large diameter of the planetary reduction mechanism directly reduces the vehicle's ground clearance, affecting its passage. Utility Model Content

[0003] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to provide a power unit for electric tricycles, which solves the problem of the installation of two electric motors due to their length, and the problem of the complex process and high processing cost of planetary mechanisms.

[0004] This utility model also provides a power unit for an electric tricycle, comprising: a power unit body, a motor connecting flange fixedly connected to the upper surface of the power unit body, a motor fixedly connected to the upper surface of the motor connecting flange, a first-stage reduction cylindrical pinion fixedly connected to the output end of the motor, a first-stage reduction cylindrical large gear meshing with the outer surface of the first-stage reduction cylindrical pinion, a second-stage reduction spiral bevel gear fixedly connected to the inner wall of the first-stage reduction cylindrical large gear via a connecting rod, a second-stage reduction spiral bevel gear meshing with the outer surface of the second-stage reduction spiral bevel gear, and a power output shaft fixedly connected to the inner wall of the second-stage reduction spiral bevel gear.

[0005] As a preferred technical solution, the upper surface of the power unit body is fixedly connected with a frame connecting boss. There are four frame connecting bosses, which are evenly distributed on the outside of the motor connecting flange. This facilitates the installation and fixing of the power unit and the frame, helps to improve the overall assembly efficiency, enhances the connection stability between the power unit and the frame, and improves the stability and safety of use.

[0006] As a preferred technical solution, the outer surface of the power unit body is fixedly connected with a shock absorber mounting boss. There are four shock absorber mounting bosses, which are evenly distributed on the outside of the power unit body. By setting the shock absorber mounting bosses on the outside of the power unit, it is convenient to install the shock absorber, effectively reduce the impact and vibration during operation, and reduce the impact on other components.

[0007] As a preferred technical solution, a brake connecting flange is fixedly connected to the outer surface of the main body of the power unit, and the position of the power output shaft is located at the center of the brake connecting flange, which facilitates the installation of the brake system and improves installation efficiency and convenience.

[0008] As a preferred technical solution, the outer surface of the power unit body is fixedly connected with a balancing mechanism mounting boss. There are two balancing mechanism mounting bosses, which are located on both sides of the power unit body. Setting two balancing mechanism mounting bosses helps to balance the operation of the power unit and enhance the stability and durability of the equipment.

[0009] As a preferred technical solution, the first-stage reduction cylindrical pinion, the first-stage reduction cylindrical gear, the second-stage reduction spiral bevel pinion, and the second-stage reduction spiral bevel gear are located inside the main body of the power unit, reducing the risk of external contamination and damage, and improving the sealing and reliability of the transmission system.

[0010] Compared with existing technologies, this solution has the following advantages: a set of spiral bevel gears is used to change the installation direction of the motor, so that the installation direction of the motor is rotated by 90° and arranged parallel to the central axis of the vehicle, avoiding interference between the installation of the two motors; a set of cylindrical gears is used in front of the spiral bevel gears to reduce the speed, balance the reduction ratio of the two sets of gears, reduce the workload of the spiral bevel gear set, and reduce the number of teeth and diameter of the large gears of the two sets of reduction gears, which is conducive to increasing the ground clearance of the vehicle. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a front view of the power unit of the electric tricycle of this utility model;

[0013] Figure 2 This is a side view of the power unit of the electric tricycle of this utility model;

[0014] Figure 3 This is a cross-sectional view of the power unit of the electric tricycle of this utility model;

[0015] Figure 4 This is a top view of the power unit of the electric tricycle of this utility model.

[0016] Legend:

[0017] 1. Motor connection flange; 2. Frame connection boss; 3. Shock absorber mounting boss; 4. Brake connection flange; 5. Balance mechanism mounting boss; 6. First-stage reduction cylindrical pinion; 7. First-stage reduction cylindrical gear; 8. Second-stage reduction spiral bevel gear; 9. Second-stage reduction spiral bevel gear; 10. Power output shaft; 11. Power unit body. Detailed Implementation

[0018] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] Reference Figure 1-4 This utility model embodiment of an electric tricycle power unit includes: a power unit body 11, which carries all power components and structures and is the core of the entire power system. It is a box or shell made of metal material, housing mechanical components such as gears and shafts, providing installation support and protection, and ensuring precise alignment and normal operation of all internal components. A motor connecting flange 1 is fixedly connected to the upper surface of the power unit body 11, connecting the motor and the power unit's transmission system, ensuring that the motor's power can be effectively transmitted to subsequent mechanical devices. The flange consists of a flange and several fixing bolts. The flange has a connecting surface that mates with the motor shaft and transmission shaft, and is fastened between the motor and the power unit by bolts, ensuring alignment and a secure connection. A motor is fixedly connected to the upper surface of the motor connecting flange 1. The output end is fixedly connected to a first-stage reduction cylindrical pinion 6 to achieve primary reduction, reducing the input speed and increasing torque. The outer surface of the first-stage reduction cylindrical pinion 6 is meshed with a first-stage reduction cylindrical large gear 7, which cooperates with the first-stage reduction cylindrical pinion 6 to complete the first reduction and increase the output torque. The inner wall of the first-stage reduction cylindrical large gear 7 is fixedly connected to a second-stage reduction spiral bevel gear 8 through a connecting rod for the second stage of reduction, increasing the reduction ratio of the transmission. The outer surface of the second-stage reduction spiral bevel gear 8 is meshed with a second-stage reduction spiral bevel gear 9, which cooperates with the second-stage reduction spiral bevel gear 8 to achieve the final reduction and provide higher torque output. The inner wall of the second-stage reduction spiral bevel gear 9 is fixedly connected to a power output shaft 10, which outputs the power obtained after passing through the reduction mechanism to drive the roller.

[0020] A frame connecting boss 2 is fixedly connected to the upper surface of the power unit body 11, serving as the connection point between the power unit and the frame, providing fixed support, and stabilizing the entire power system. It is generally a raised structure, fixed to the surface of the power unit body 11, and has screw holes or other fixing devices. The power unit is fixed to the frame by bolts or other means. Four frame connecting bosses 2 are provided, evenly distributed on the outside of the motor connecting flange 1. A shock absorber mounting boss 3 is fixedly connected to the outer surface of the power unit body 11 for installing shock absorbers, reducing equipment vibration and impact, and protecting the power system and vehicle structure. Four shock absorber mounting bosses 3 are provided, evenly distributed on the outside of the power unit body 11. A brake connecting flange 4 is fixedly connected to the outer surface of the power unit body 11. Connecting the braking device and the power unit, transmitting braking force, and realizing braking control, it consists of a flange and connecting bolts. The connecting surface is designed with mating grooves or holes. It is fixedly engaged with the braking device through the flange, transmitting braking force to the power output shaft 10 to stop the vehicle. The power output shaft 10 is located at the center of the brake connecting flange 4. The outer surface of the power unit body 11 is fixedly connected to the balancing mechanism mounting boss 5, which is used to balance the power unit, reduce vibration and off-center load. There are two balancing mechanism mounting bosses 5, which are located on both sides of the power unit body 11. The first-stage reduction cylindrical pinion 6, the first-stage reduction cylindrical gear 7, the second-stage reduction spiral bevel gear 8, and the second-stage reduction spiral bevel gear 9 are located inside the power unit body 11.

[0021] Working principle: During use, the motor drives the first-stage reduction cylindrical pinion 6 inside the main body 11 of the power unit to rotate the first-stage reduction cylindrical large gear 7 that meshes with the first-stage reduction cylindrical pinion 6. The rotation of the first-stage reduction cylindrical large gear 7 drives the second-stage reduction spiral bevel gear 8 to rotate through the connecting rod. This causes the second-stage reduction spiral bevel gear 9 that meshes with the second-stage reduction spiral bevel gear 8 to rotate the power output shaft 10. The power output shaft 10 then rotates the rollers.

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power unit for an electric tricycle, characterized in that, include: The main body of the power unit (11) is fixedly connected to the upper surface of the main body of the power unit (11), and the upper surface of the motor connecting flange (1) is fixedly connected to the motor. The output end of the motor is fixedly connected to a first-stage reduction cylindrical pinion (6). The outer surface of the first-stage reduction cylindrical pinion (6) is meshed with a first-stage reduction cylindrical gear (7). The inner wall of the first-stage reduction cylindrical gear (7) is fixedly connected to a second-stage reduction spiral bevel gear (8) through a connecting rod. The outer surface of the second-stage reduction spiral bevel gear (8) is meshed with a second-stage reduction spiral bevel gear (9). The inner wall of the second-stage reduction spiral bevel gear (9) is fixedly connected to a power output shaft (10).

2. The electric tricycle power unit as described in claim 1, characterized in that, The upper surface of the power unit body (11) is fixedly connected with a frame connecting boss (2). There are four frame connecting bosses (2), which are evenly distributed on the outside of the motor connecting flange (1).

3. The electric tricycle power unit as described in claim 1, characterized in that, The outer surface of the power unit body (11) is fixedly connected with a shock absorber mounting boss (3). There are four shock absorber mounting bosses (3), which are evenly distributed on the outside of the power unit body (11).

4. The electric tricycle power unit as described in claim 1, characterized in that, The outer surface of the power unit body (11) is fixedly connected to a brake connection flange (4), and the position of the power output shaft (10) is located at the center of the brake connection flange (4).

5. The electric tricycle power unit as described in claim 1, characterized in that, The outer surface of the power unit body (11) is fixedly connected with a balancing mechanism mounting boss (5). There are two balancing mechanism mounting bosses (5), which are located on both sides of the power unit body (11).

6. The electric tricycle power unit as described in claim 1, characterized in that, The first-stage reduction cylindrical pinion (6), the first-stage reduction cylindrical gear (7), the second-stage reduction spiral bevel gear (8), and the second-stage reduction spiral bevel gear (9) are located inside the main body of the power unit (11).

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