CN217683074U - Speed reducing mechanism of electric wheel driving system - Google Patents

Abstract

The utility model discloses a deceleration mechanism of an electric wheel drive system, which belongs to the technical field of electric wheel drive systems. A planetary gear is engaged, the side of the planetary gear close to the inner gear is meshed with the inner gear, the inside of the planetary gear is fixedly connected with a wheel shaft, and both sides of the surface of the wheel shaft are movably connected with a first planet carrier and The second planetary carrier solves the need to install a reduction mechanism in the existing electric wheel drive system to meet the power matching of the entire transmission system, and the role of the reduction mechanism for reducing speed and increasing torque is essential. The planetary carrier using the planetary gear reduction mechanism will Power output, but there are problems such as complex mechanism, low speed, high noise, etc., and in order to achieve high transmission ratio, multi-stage planetary mechanisms are often used, resulting in large volume, and the size and quality of each part cannot be guaranteed.

Description

A speed reduction mechanism of an electric wheel drive system

technical field

The utility model relates to the technical field of electric wheel drive systems, in particular to a deceleration mechanism of the electric wheel drive system.

Background technique

The electric drive system includes the electric motor, the electric motor controller and the transmission mechanism. Some electric vehicles can directly drive the wheels by the electric motor.

Electric vehicles with electric wheel drive system as the power source are gradually promoted. The electric wheel is a key assembly of electric vehicles, and the existing electric wheel drive system needs to install a deceleration mechanism to meet the power matching of the entire transmission system, and the deceleration mechanism The role of speed reduction and torque increase is essential. The planet carrier of the planetary gear reduction mechanism is used to output power, but there are problems such as complex mechanism, low speed, and large noise. In order to achieve a high transmission ratio, multi-stage planetary mechanisms are often used , resulting in a large volume, and the size and quality of each part cannot be guaranteed.

Utility model content

The utility model provides a deceleration mechanism of an electric wheel drive system, which aims to solve the problem that the existing electric wheel drive system needs to install a deceleration mechanism in order to meet the power matching of the entire transmission system, and the function of the deceleration mechanism to reduce speed and increase torque is indispensable , using the planet carrier of the planetary gear reduction mechanism to output power, but there are problems such as complex mechanism, low speed, high noise, etc., and in order to achieve high transmission ratio, multi-stage planetary mechanism is often used, resulting in large volume and the size of each part And the quality is not guaranteed, which affects the problem of transmission effect.

The utility model is realized in the following way. A deceleration mechanism of an electric wheel drive system includes an inner ring gear. A sun gear is meshed inside the inner ring gear, and a planetary wheel is meshed on the surface of the sun wheel. The planetary gear The side close to the inner ring gear meshes with the inner ring gear, and the inside of the planetary gear is fixedly connected with a wheel shaft, and both sides of the surface of the wheel shaft are movably connected with a first planetary carrier and a second planetary carrier, and the sun gear A motor shaft is meshed inside the second planet carrier, and an output shaft is fixedly connected to the side of the second planet carrier away from the ring gear.

In order to achieve the effect of fixing the wheel shaft, as a deceleration mechanism of the electric wheel drive system of the present invention, the number of the planetary gears is three, and the planetary gears are meshed in a triangle between the inner ring gear and the sun gear, so The surface of the wheel shaft is fixedly connected with bearings, and the surfaces of the bearings are fixedly connected with the inner walls of the first planet carrier and the second planet carrier respectively, and the wheel shaft is respectively movably connected with the first planet carrier and the second planet carrier through the bearings.

In order to achieve the effect of facilitating the connection between the motor shaft and the sun gear, as a reduction mechanism of the electric wheel drive system of the present invention, it is preferable that the end of the motor shaft away from the sun gear penetrates the inside of the first planetary carrier and extends to the first On the outer side of the planet carrier, the motor shaft is a spline shaft, and the inside of the sun gear is fixedly connected with a spline sleeve used in conjunction with the motor shaft.

In order to achieve the effect of facilitating the fixing of the first planetary carrier and the second planetary carrier, as a reduction mechanism of the electric wheel drive system of the present invention, it is preferred that the first planetary carrier is fixedly connected with the second planetary carrier, The inside of the first planet carrier is movably connected with bolts, and the side of the bolt close to the second planet carrier extends to the inside of the second planet carrier and is threadedly connected with the second planet carrier.

In order to achieve the effect of improving the stability of the bolts, as a reduction mechanism of the electric wheel drive system of the present invention, preferably, the number of the bolts is several, and the bolts are movably connected inside the first planet carrier in a triangular shape.

In order to achieve the effect of preventing axial displacement, as a deceleration mechanism of the electric wheel drive system of the present invention, it is preferred that the insides of the first planetary carrier and the second planetary carrier are fixedly connected with retaining rings, and the retaining rings For use with bearings.

Compared with the prior art, the beneficial effects of the present utility model are:

The reduction mechanism of the electric wheel drive system transmits the power output by the external power input box to the inner ring gear through the motor shaft, sun gear, and planetary gear in turn, and installs the inner ring gear on the wheel, so the output of the inner ring gear The power drives the wheels to rotate through the output shaft. This kind of reduction mechanism has a simple, reasonable and compact structure, a large transmission ratio, good power, and a long service life. , has a longer service life and reduces the cost of use, and has higher braking reliability and safety, and plays the role of deceleration and torque increase.

Description of drawings

Fig. 1 is the overall structural diagram of the deceleration mechanism of the electric wheel drive system of the present utility model;

Fig. 2 is the structural diagram of internal ring gear in the utility model;

Fig. 3 is an exploded view of the whole in the utility model;

Fig. 4 is the front view of the inner ring gear in the utility model;

Fig. 5 is a top view of the inner ring gear in the utility model.

In the figure, 1. inner ring gear; 2. sun gear; 3. planetary gear; 4. axle; 5. first planet carrier; 6. second planet carrier; 7. motor shaft; 8. output shaft; 9. bearing ; 10, spline sleeve; 11, bolt; 12, retaining ring.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clearly understood, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

In describing the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical" , "horizontal", "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the present invention. In addition, in the description of the present utility model, "plurality" means two or more, unless otherwise specifically defined.

Please refer to Figures 1-5, the utility model provides a technical solution: a deceleration mechanism for an electric wheel drive system, including an inner ring gear 1, a sun gear 2 is meshed inside the inner ring gear 1, and a planet is meshed on the surface of the sun gear 2 The side of the planetary gear 3 close to the ring gear 1 meshes with the ring gear 1, the planetary gear 3 is fixedly connected with the wheel shaft 4, and both sides of the surface of the wheel shaft 4 are movably connected with the first planet carrier 5 and the second The second planet carrier 6 is engaged with the motor shaft 7 inside the sun gear 2 , and the output shaft 8 is fixedly connected to the side of the second planet carrier 6 away from the ring gear 1 .

In this embodiment: the power output by the external power input box is sequentially transmitted to the ring gear 1 through the motor shaft 7, the sun gear 2, and the planetary gear 3, and the ring gear 1 is installed on the wheel, so the ring gear 1 The output power drives the wheels to rotate through the output shaft 8. This speed reduction mechanism has a simple, reasonable and compact structure, a large transmission ratio, good power, and a long service life. It has a long service life and reduces the cost of use, and has higher braking reliability and safety, and plays the role of deceleration and torque increase.

As a technical optimization scheme of the present utility model, the number of planetary gears 3 is three, and is meshed between the inner ring gear 1 and the sun gear 2 in a triangle shape, and the surface of the wheel shaft 4 is fixedly connected with a bearing 9, and the surface of the bearing 9 is respectively connected to the The inner walls of the first planetary carrier 5 and the second planetary carrier 6 are fixedly connected, and the axle 4 is respectively movably connected with the first planetary carrier 5 and the second planetary carrier 6 through bearings 9 .

In this embodiment: by setting the number of planetary gears 3 to three and meshing them in a triangle between the inner ring gear 1 and the sun gear 2, it is convenient for the planetary gears 3 to rotate around the sun gear 2 and then transmit power to the second gear. Planetary carrier 6, so as to realize power output, by setting bearing 9, can avoid wheel axle 4 and the first planetary carrier 5 and the second planetary carrier 6 to produce friction due to direct contact, and then cause the situation of part grinding, can improve its safety Performance and reliability, with a long service life.

As a technical optimization scheme of the present invention, the end of the motor shaft 7 away from the sun gear 2 runs through the inside of the first planet carrier 5 and extends to the outside of the first planet carrier 5, the motor shaft 7 is a spline shaft, and the inside of the sun gear 2 A spline sleeve 10 used in conjunction with the motor shaft 7 is fixedly connected.

In this embodiment: by setting the spline sleeve 10, the connection between the motor shaft 7 and the sun gear 2 can be facilitated, and the external power input box can control the driving force of the motor shaft 7 so as to transmit power to the sun gear 2 on.

As a technical optimization scheme of the present utility model, the first planetary carrier 5 and the second planetary carrier 6 are fixedly connected, and the inside of the first planetary carrier 5 is movably connected with a bolt 11, and the bolt 11 is close to the side of the second planetary carrier 6 It extends to the inside of the second planet carrier 6 and is screwed with the second planet carrier 6 .

In this embodiment: by setting the bolt 11, the bolt 11 passes through the inside of the first planet carrier 5 and enters the inside of the second planet carrier 6, so that the first planet carrier 5 and the second planet carrier 6 can be fixed Connect, so that the output shaft 8 can output power.

As a technical optimization solution of the present invention, there are several bolts 11 , which are movably connected inside the first planet carrier 5 in a triangular shape.

In this embodiment: by setting the number of bolts 11 to several, and moving inside the first planet carrier 5 in a triangular shape, the stability when fixing between the first planet carrier 5 and the second planet carrier 6 can be improved and strengthen the fixing strength, so that the first planetary carrier 5 and the second planetary carrier 6 are not easy to separate.

As a technical optimization solution of the present invention, both the first planetary carrier 5 and the second planetary carrier 6 are fixedly connected with retaining rings 12 inside, and the retaining rings 12 are used in conjunction with the bearings 9 .

In this embodiment: by setting the retaining ring 12 and cooperating with the bearing 9, the effect of fixing the bearing 9 can be achieved, preventing the axial displacement of both ends of the bearing 9, and ensuring the normal use of the bearing 9.

Working principle: First, install the inner ring gear 1 and the wheel frame together, and then control the driving force of the motor shaft 7 through the power input box to drive the spline sleeve 10 to rotate, so that the spline sleeve 10 drives the sun gear 2 to rotate, Through the meshing state of the planetary gear 3 with the sun gear 2 and the ring gear 1 respectively, the sun gear 2 can drive the planetary gear 3 to rotate, and the wheel shaft 4 can rotate inside the bearing 9, so that the planetary gear 3 can rotate around the sun gear 2 Rotate and then transmit the power to the second planetary carrier 6, so that the second planetary carrier 6 can output the power through the output shaft 8 and drive the wheels to rotate. Service life, and reduce the vehicle mechanism, high space utilization, provide safety and reliability, have a longer service life and reduce the cost of use, and have higher braking reliability and safety, play a role in deceleration Increased torque.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in the present utility model. within the scope of protection.

Claims (6)

1. A reduction mechanism of an electric wheel drive system, comprising an internal ring gear (1), characterized in that: the inner ring gear (1) is meshed with a sun gear (2), the sun gear (2) A planetary gear (3) is meshed on the surface, and the side of the planetary gear (3) close to the ring gear (1) is meshed with the ring gear (1), and the inside of the planetary gear (3) is fixedly connected with a wheel shaft ( 4), both sides of the surface of the axle (4) are movably connected with a first planet carrier (5) and a second planet carrier (6), and the inside of the sun gear (2) is meshed with a motor shaft (7), The side of the second planet carrier (6) away from the ring gear (1) is fixedly connected with an output shaft (8). 2. The speed reduction mechanism of an electric wheel drive system according to claim 1, characterized in that: the number of the planetary gears (3) is three, and the inner ring gear (1) and the sun gear are meshed in a triangle (2), the surface of the axle (4) is fixedly connected with a bearing (9), and the surface of the bearing (9) is fixed to the inner wall of the first planetary carrier (5) and the second planetary carrier (6) respectively. connected, the axle (4) is movably connected with the first planetary carrier (5) and the second planetary carrier (6) respectively through bearings (9). 3. The reduction mechanism of an electric wheel drive system according to claim 1, characterized in that: the end of the motor shaft (7) away from the sun gear (2) penetrates the inside of the first planet carrier (5) and extends To the outside of the first planet carrier (5), the motor shaft (7) is a spline shaft, and the inside of the sun gear (2) is fixedly connected with a spline sleeve (10) used in conjunction with the motor shaft (7) . 4. A reduction mechanism for an electric wheel drive system according to claim 1, characterized in that: the first planetary carrier (5) is fixedly connected to the second planetary carrier (6), and the first The interior of the planet carrier (5) is movably connected with a bolt (11), and the side of the bolt (11) close to the second planet carrier (6) extends to the inside of the second planet carrier (6) and connects with the second planet carrier ( 6) Threaded connection. 5. A speed reduction mechanism for an electric wheel drive system according to claim 4, characterized in that: the number of the bolts (11) is several, and they are flexibly connected inside the first planetary carrier (5) in a triangular shape . 6. The speed reduction mechanism of an electric wheel drive system according to claim 2, characterized in that: the insides of the first planetary carrier (5) and the second planetary carrier (6) are fixedly connected with retaining rings (12 ), the retaining ring (12) is used in conjunction with the bearing (9).

Images