CN219139737U

CN219139737U - Continuously variable transmission adopting differential split type single-row double-stage planetary gears

Info

Publication number: CN219139737U
Application number: CN202220067495.XU
Authority: CN
Inventors: 赵军
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-01-12
Filing date: 2022-01-12
Publication date: 2023-06-06
Anticipated expiration: 2032-01-12

Abstract

The utility model relates to the technical field of speed changers, in particular to a continuously variable transmission adopting differential split type single-row double-stage planetary gears, which comprises a differential mechanism and an inner gear ring, wherein the differential mechanism comprises an output shaft, a first gear is arranged at the end part of each output shaft, a planetary gear mechanism comprises a first input shaft and a second input shaft, a second gear is arranged at the end part of each output shaft, the first input shaft is fixedly connected with a first rotating disc, the first rotating disc is fixedly connected with a second rotating disc through a connecting shaft group, the second input shaft is provided with a sun gear, the middle part of each connecting shaft is rotationally connected with a first planetary gear and a second planetary gear, the continuously variable transmission comprises an inner gear ring and an outer gear ring, and gear teeth on the inner side of the inner gear ring and the outer gear ring are meshed with the second planetary gears.

Description

Continuously variable transmission adopting differential split type single-row double-stage planetary gears

Technical Field

The utility model relates to the technical field of speed changers, in particular to a continuously variable transmission adopting differential split type single-row double-stage planetary gears.

Background

Continuously variable transmissions are an essential component of a vehicle or the like for achieving continuous changes in gear ratios, resulting in an optimal match of the drive train to the operating conditions of the engine.

The continuously variable transmission in the prior art adopts the combination of a driving belt and a driving wheel and a driven wheel with variable working diameters to transmit power, and adopts a steel belt, a steel chain or a conical column to realize the transmission, but the driving belt is easy to damage, the bearable load is smaller, the contact area of the conical column is smaller, the driving belt is easy to slip when the load is larger, and the driving belt is easy to break down.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the utility model provides the continuously variable transmission adopting the differential split type single-row double-stage planetary gear, which solves the problems that a continuously variable transmission conveyor belt in the prior art is easy to damage, can bear smaller load, has smaller contact area of a conical column, is easy to slip when the load is larger, and is easy to break down.

The technical proposal is as follows:

the differential split type single-row two-stage planetary gear stepless speed changer comprises a differential mechanism, wherein the differential mechanism comprises two output shafts which are symmetrically arranged by taking a vertical central line as a center, a first gear is arranged at the end part of each output shaft, and a first belt seat bearing is rotationally connected to the middle part of each output shaft;

the planetary gear mechanism comprises a first input shaft and a second input shaft which are respectively connected with the two output shafts in a transmission way,

the first input shaft and the second input shaft are oppositely arranged, one end of the first input shaft, which is close to the first gear, is respectively provided with a second gear meshed with the first gear, and the second input shaft are respectively connected with a second bearing with a seat in a rotating way;

the first input shaft is fixedly connected with a first rotating disc near one end of a second input shaft, a connecting shaft group is arranged on the first rotating disc in a penetrating manner, a second rotating disc is sleeved at one end, far away from the first rotating disc, of the connecting shaft group, nuts used for fixing the first rotating disc and the second rotating disc are connected at two ends of the connecting shaft group in a threaded manner, the second input shaft is arranged at the axis of the second rotating disc in a penetrating manner and is in rotating connection with the second rotating disc, a sun wheel is arranged at one end, close to the first input shaft, of the second input shaft, the connecting shaft group comprises a first connecting shaft and a second connecting shaft, a first planet wheel in transmission connection with the sun wheel is connected in rotation at the middle of the first connecting shaft, a second planet wheel in transmission connection with the first planet wheel is connected in a rotating manner at the middle of the second connecting shaft, an inner gear and an outer gear in transmission connection with the second planet wheel is meshed with the second planet wheel, and gear teeth on the inner side of the inner gear and the outer gear are meshed with the second planet wheel; and gaps are reserved between the two side surfaces of the inner gear ring and the outer gear ring and between the two side surfaces of the inner gear ring and the first rotating disc and between the two side surfaces of the inner gear ring and the second rotating disc respectively.

Preferably, the number of the first connecting shafts is three, the first connecting shafts are arranged in an array by taking the axle center of the first rotating disc as the center circumference, the middle parts of the first connecting shafts are rotationally linked with first planet gears, and the first planet gears are meshed with the sun gear;

the number of the second connecting shafts is three, the second connecting shafts are arranged in a circumferential array by taking the axle center of the first rotating disc as the center, the middle parts of the second connecting shafts are rotationally linked with second planetary gears, and the second planetary gears are respectively meshed with the first planetary gears and the inner gear ring and the outer gear ring.

Preferably, the gear further comprises an output gear in driving connection with the inner gear ring and the outer gear ring, and gear teeth of the output gear are meshed with gear teeth on the outer sides of the inner gear ring and the outer gear ring.

Preferably, the diameter of the first connecting shaft is smaller than that of the second connecting shaft, the diameters of the two ends of the first connecting shaft and the second connecting shaft are smaller than the diameter of the middle of the first connecting shaft and the diameter of the second connecting shaft, and threads for being in threaded connection with the nuts are arranged at the two ends of the first connecting shaft and the second connecting shaft.

The beneficial effects of the utility model are as follows:

according to the utility model, through the arrangement of the differential mechanism and the planetary gear mechanism, the power of the two output shafts is transmitted to the first input shaft and the second input shaft through the meshing of the first gear and the second gear, and the first input shaft rotates to drive the first rotating disc, the second rotating disc, the connecting shaft group, the first planetary gear and the second planetary gear to rotate by taking the first input shaft as the axle center; the second input shaft rotates to drive the sun gear to synchronously rotate, meanwhile, the sun gear rotates to drive the first planet gears meshed with the sun gear to rotate, the first planet gears rotate to drive the second planet gears to rotate, the second planet gears rotate to drive the inner gear ring and the outer gear ring to rotate, stepless speed change of the inner gear ring and the outer gear ring is achieved, the structure is stable, the structure is not easy to damage, the bearing load is large, slipping is prevented, and the failure rate is reduced.

Drawings

Fig. 1 is a perspective view of the present utility model.

Fig. 2 is a top view of the present utility model.

Fig. 3 is a perspective view of the planetary gear mechanism of the present utility model.

Fig. 4 is an exploded view of the planetary gear mechanism of the present utility model.

Fig. 5 is a cross-sectional view of the planetary gear mechanism of the utility model.

Fig. 6 is a perspective view of the output shaft of the present utility model.

Wherein: differential 1, output shaft 101, first gear 102, first belt bearing 103, second gear 104, planetary gear mechanism 2, first input shaft 201, second input shaft 202, second belt bearing 203, first rotating disk 204, first connecting shaft 205, second connecting shaft 206, second rotating disk 207, nut 208, sun gear 209, first planetary gear 210, second planetary gear 211, and inner and outer ring gears 212.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Embodiment one:

the differential split type single-row two-stage planetary gear stepless speed changer comprises a differential mechanism 1, wherein the differential mechanism 1 is in the prior art, the differential mechanism 1 comprises two output shafts 101 which are symmetrically arranged by taking a vertical central line as a center, the two output shafts can rotate at different rotation speeds, a first gear 102 is welded and fixed at the end part of each output shaft 101 and used for transmission connection, a first belt seat bearing 103 is rotationally connected with the middle part of each output shaft 101, and the two first belt seat bearings 103 are fixedly connected with a specific applied equipment rack through a bolt group, so that the output shafts 101 stably rotate.

And a planetary gear mechanism 2, wherein the planetary gear mechanism 2 comprises a first input shaft 201 and a second input shaft 202 which are respectively connected with the two output shafts 101 in a transmission way,

the first input shaft 201 and the second input shaft 202 are oppositely arranged, one ends of the first input shaft 201 and the second input shaft 202, which are close to the first gear 102, are respectively welded and fixed with a second gear 104 meshed with the first gear 102, so that power of two output shafts 101 of the differential mechanism 1 is respectively transmitted to the first input shaft 201 and the second input shaft 202, second seat bearings 203 are respectively connected to the middle parts of the first input shaft 201 and the second input shaft 202 in a rotating mode, and the two second seat bearings 203 are fixedly connected with a specific applied equipment rack through bolt groups, so that the first input shaft 201 and the second input shaft 202 rotate stably.

One end of the first input shaft 201, which is close to the second input shaft 202, is fixedly connected with a first rotating disc 204 in a welded manner, the first rotating disc 204 is of a circular plate-shaped structure, a connecting shaft group is arranged on the first rotating disc 204 in a penetrating manner, a penetrating hole for the connecting shaft to penetrate is arranged on the first rotating disc 204,

the connecting shaft group is arranged in the through hole in a penetrating way, one end, far away from the first rotating disc 204, of the connecting shaft group is sleeved with a second rotating disc 207, the second rotating disc 207 is of a circular plate-shaped structure identical to the first rotating disc 204, through holes for the connecting shaft to penetrate through are formed in the second rotating disc 207, nuts 208 for fixing the first rotating disc 204 and the second rotating disc 207 are connected with two ends of the connecting shaft group in a threaded way, a structure in which the first rotating disc 204 and the second rotating disc 207 are oppositely arranged and fixed is formed, and a gap is reserved between the first rotating disc 204 and the second rotating disc 207.

The axle center of the second rotating disc 207 is provided with a through hole for the second input shaft 202 to pass through, the second input shaft 202 passes through the axle center of the second rotating disc 207 and is rotationally connected with the second input shaft, one end of the second input shaft 202, which is close to the first input shaft 201, is provided with a sun gear 209, and the sun gear 209 synchronously rotates along with the second input shaft 202.

The connecting shaft group comprises a first connecting shaft 205 and a second connecting shaft 206, wherein the middle part of the first connecting shaft 205 is rotationally connected with a first planet gear 210, the first planet gear 210 is in transmission connection with a sun gear 209, the middle part of the second connecting shaft 206 is rotationally connected with a second planet gear 211, the second planet gear 211 is in transmission connection with the first planet gear 210, the connecting shaft group further comprises an inner gear ring 212 and an outer gear ring 212 in transmission connection with the second planet gear 211, the inner gear ring 212 is in an annular structure, gear teeth are arranged on the inner periphery side and the outer periphery side of the inner gear ring 212, and the gear teeth on the inner side of the inner gear ring and the outer gear ring 211 are meshed with the second planet gear ring 211; gaps are reserved between the two side surfaces of the inner gear ring 212 and the outer gear ring and between the two side surfaces of the inner gear ring 212 and the first rotating disc 204 and the second rotating disc 207 respectively.

The number of the first connecting shafts 205 is three, the first connecting shafts 205 are arranged in a circumferential array with the axle center of the first rotating disc 204 as the center, the middle part of each first connecting shaft 205 is rotationally linked with a first planet wheel 210, and each first planet wheel 210 is meshed with a sun gear 209; the number of the second connecting shafts 206 is three, and the second connecting shafts 206 are arranged in a circumferential array with the axle center of the first rotating disc 204 as the center, and the distance between each second connecting shaft 206 and the axle center of the first rotating disc 204 is greater than the distance between each first connecting shaft 205 and the axle center of the first rotating disc 204; a second planetary gear 211 is rotatably linked to the middle of each second connecting shaft 206, and each second planetary gear 211 is meshed with the first planetary gear 210 and the inner and outer gear rings 212 respectively.

In the specific application equipment, a transmission shaft of the differential 1 is connected with a power device such as an engine or a motor, the power of two output shafts 101 is transmitted to a first input shaft 201 and a second input shaft 202 through the meshing of a first gear 102 and a second gear 104, and the first input shaft 201 rotates to drive a first rotating disc 204, a second rotating disc 207, a connecting shaft group, a first planet gear 210 and a second planet gear 211 to rotate around the first input shaft 201; the second input shaft 202 rotates to drive the sun gear 209 to synchronously rotate, meanwhile, the sun gear 209 rotates to drive the first planetary gear 210 meshed with the sun gear 209 to rotate, the first planetary gear 210 rotates to drive the second planetary gear 211 to rotate, and the second planetary gear 211 rotates to drive the inner gear ring 212 and the outer gear ring 212 to rotate, so that stepless speed change of the inner gear ring 212 and the outer gear ring 212 is realized.

Still more particularly, the diameter of the sun gear 209 is 5 cm, and the number of teeth is 15 teeth. The diameters of the first planetary gear 210 and the second planetary gear 211 are 5 cm, and the number of teeth is 15. The inner and outer ring gears 212 have a diameter of 22 cm and a number of 86 teeth.

The power transmission device further comprises an output gear in transmission connection with the inner gear ring 212, gear teeth of the output gear are meshed with gear teeth on the outer sides of the inner gear ring 212, and power of the inner gear ring 212 is transmitted to the output gear, so that power output after stepless speed change is achieved. The diameter of the output gear is 17.6 cm, and the number of teeth is 72 teeth.

When the sun gear 209 rotates for 4 circles, the output rotates for 1 circle, and when the power is sufficient, the first output shaft 201 and the second input shaft 202 rotate in the same direction, and the speed of the first output shaft 201 plays an acceleration role according to the power state, and when the power is increased, the first output shaft 201 and the second input shaft 202 rotate in the same direction, so that the transmission ratio is 1:1, in this case, the maximum rotational speed.

In the above or some embodiments, the diameter of the first connecting shaft 205 is smaller than that of the second connecting shaft 206, the diameters of the two ends of the first connecting shaft 205 and the second connecting shaft 206 are smaller than that of the two ends, and the two ends are provided with threads for being in threaded connection with the nut 208. The nuts 208 are screwed to the first and second connecting

shafts

205 and 206 to fix the relative positions of the first and second rotating

disks

204 and 207.

The working principle of the utility model is as follows:

the power of the two output shafts 101 is transmitted to a first input shaft 201 and a second input shaft 202 through the meshing of a first gear 102 and a second gear 104, and the first input shaft 201 rotates to drive a first rotating disc 204, a second rotating disc 207, a connecting shaft group, a first planetary gear 210 and a second planetary gear 211 to rotate by taking the first input shaft 201 as an axle center; the second input shaft 202 rotates to drive the sun gear 209 to synchronously rotate, meanwhile, the sun gear 209 rotates to drive the first planetary gear 210 meshed with the sun gear 209 to rotate, the first planetary gear 210 rotates to drive the second planetary gear 211 to rotate, and the second planetary gear 211 rotates to drive the inner gear ring 212 and the outer gear ring 212 to rotate, so that stepless speed change of the inner gear ring 212 and the outer gear ring 212 is realized.

The present utility model has been described in detail by way of specific embodiments and examples, but these should not be construed as limiting the utility model. Many variations and modifications may be made by one skilled in the art without departing from the principles of the utility model, which is also considered to be within the scope of the utility model.

Claims

1. Adopt differential reposition of redundant personnel list row doublestage planetary gear's continuously variable transmission, including differential mechanism (1), its characterized in that:

the differential mechanism (1) comprises two output shafts (101) which are symmetrically arranged by taking a vertical central line as a center, a first gear (102) is arranged at the end part of each output shaft (101), and a first belt seat bearing (103) is rotationally connected to the middle part of each output shaft (101);

the planetary gear mechanism (2) is further included, the planetary gear mechanism (2) comprises a first input shaft (201) and a second input shaft (202) which are respectively connected with the two output shafts (101) in a transmission way,

the first input shaft (201) and the second input shaft (202) are oppositely arranged, one end, close to the first gear (102), of each input shaft is provided with a second gear (104) meshed with the first gear (102), and each second gear is rotatably connected with a second bearing (203);

the planetary gear transmission device comprises a first input shaft (201), a first rotating disc (204) is fixedly connected to one end, close to a second input shaft (202), of the first input shaft (201), a connecting shaft group is arranged on the first rotating disc (204) in a penetrating mode, a second rotating disc (207) is sleeved at one end, far away from the first rotating disc (204), of the connecting shaft group, nuts (208) used for fixing the first rotating disc (204) and the second rotating disc (207) are connected to the two ends of the connecting shaft group in a threaded mode, the second input shaft (202) is arranged at the axis of the second rotating disc (207) in a penetrating mode and is in rotating connection with the second rotating disc, a sun gear (209) is arranged at one end, close to the first input shaft (201), of the second input shaft (202), the connecting shaft group comprises a first connecting shaft (205) and a second connecting shaft (206), a first planet wheel (210) in transmission connection with the sun gear (209) is connected to the middle portion of the first connecting shaft (205), a second planet wheel (211) in transmission connection with the middle portion of the first planet wheel (210), and a second planet wheel (211) in transmission connection with an inner gear (212) is meshed with an outer gear (212); the two sides of the inner and outer gear rings (212) are respectively rotated with the first rotation A gap is left between the disc (204) and the second rotating disc (207).

2. The continuously variable transmission employing differential split single row two-stage planetary gears according to claim 1, wherein:

the number of the first connecting shafts (205) is three, the first connecting shafts are arranged in a circumferential array by taking the axle center of the first rotating disc (204) as the center, the middle part of each first connecting shaft (205) is rotationally linked with a first planet wheel (210), and each first planet wheel (210) is meshed with a sun wheel (209);

the number of the second connecting shafts (206) is three, the second connecting shafts are arranged in a circumferential array by taking the axle center of the first rotating disc (204) as the center, the middle part of each second connecting shaft (206) is rotationally linked with a second planet wheel (211), and each second planet wheel (211) is respectively meshed with the first planet wheel (210) and the inner gear ring (212).

3. The continuously variable transmission employing differential split single row two-stage planetary gears according to claim 1, wherein:

the gear further comprises an output gear in transmission connection with the inner gear ring (212), and gear teeth of the output gear are meshed with gear teeth on the outer sides of the inner gear ring (212).

4. The continuously variable transmission employing differential split single row two-stage planetary gears according to claim 1, wherein:

the diameter of the first connecting shaft (205) is smaller than that of the second connecting shaft (206), the diameters of the two ends of the first connecting shaft (205) and the second connecting shaft (206) are smaller than that of the middle part, and threads for threaded connection with the nuts (208) are arranged at the two ends.