CN210510172U

CN210510172U - Three-gear variable-speed transmission mechanism

Info

Publication number: CN210510172U
Application number: CN201921298848.1U
Authority: CN
Inventors: 瞿庆涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-12
Filing date: 2019-08-12
Publication date: 2020-05-12
Anticipated expiration: 2029-08-12

Abstract

The utility model discloses a three keep off variable speed drive mechanism, including input shaft and output shaft, the cover is equipped with first, second and third gear on the input shaft, and the second gear passes through the spline and is connected with the input shaft, and first gear and third gear empty cover are on the input shaft, and the cover is equipped with fourth, fifth and sixth gear on the output shaft, and the fifth gear empty cover is on the input shaft, and fourth gear and sixth gear pass through spline and output shaft, first gear and fourth gear, second gear and fifth gear, third gear and sixth gear constant mesh. The utility model discloses can further optimize three-gear variable speed drive's structure and performance.

Description

Three-gear variable-speed transmission mechanism

Technical Field

The utility model relates to a variable speed drive of car.

Background

The utility model patent application with publication number CN108730429A discloses a three-gear speed change device, which comprises an input shaft, an output shaft and an intermediate shaft, wherein the input shaft is coaxial with the output shaft, and the inner end of the output shaft extends into an end hole at the inner end of the input shaft and is rotatably supported at the inner end of the input shaft; the input shaft is sleeved with a first gear and a third gear, the output shaft is fixed with a fifth gear, the intermediate shaft is sleeved with a second gear, a fourth gear and a sixth gear, the second gear is normally meshed with the first gear, the fourth gear is normally meshed with the third gear, and the sixth gear is normally meshed with the fifth gear. Although the three-gear speed change device has a simpler structure than other three-gear speed change devices, the three-gear speed change device still has the following defects: the device comprises three shafts, namely an input shaft, an output shaft and an intermediate shaft, and more shaft parts are arranged; the input shaft and the output shaft are positioned on the same axis, so that the axial size of the three-gear speed change device is larger, and the overall size of the three-gear speed change device is larger; the inner end of the output shaft is rotatably supported at the inner end of the input shaft, a bearing in rotary fit is needed for the inner ends of the input shaft and the output shaft, and at least two bearings are required to be mounted at the outer end of the output shaft for improving the rigidity of the output shaft and preventing the output shaft from rotating due to cantilever support, so that the structural strength is low, and the manufacturing cost is high; and fourthly, the rotating speed of one gear (second gear) of the three-gear speed changing device can be transmitted according to the ratio of 1:1, and the rotating speed matching range is smaller.

Disclosure of Invention

The utility model aims at providing a three keep off variable speed drive to further optimize its structure and performance.

Three keep off variable speed drive mechanism, including input shaft and the output shaft that is parallel to each other, the cover is equipped with first gear, second gear and third gear on the input shaft, the second gear passes through the spline and is connected with the input shaft, first gear and third gear empty sleeve are on the input shaft, it is located respectively and is close to the both ends of second gear, the interior terminal surface of first gear and the interior terminal surface of third gear be provided with can with the internal tooth of second gear engagement.

The output shaft is sleeved with a fourth gear, a fifth gear and a sixth gear, the fifth gear is sleeved on the input shaft in an empty mode, the fourth gear and the sixth gear are connected with the output shaft through splines and are located at two ends close to the fifth gear respectively, and inner teeth capable of being meshed with the sixth gear are arranged on the end face of the fifth gear, which is close to one end of the sixth gear.

The first gear is in constant mesh with the fourth gear, the second gear is in constant mesh with the fifth gear, the third gear is in constant mesh with the sixth gear, and the shifting fork groove is formed in the second gear and the sixth gear along the circumferential direction.

Three keep off variable speed drive only an input shaft and an output shaft, reduced a countershaft and one and be used for input shaft and output shaft normal running fit's bearing for CN 108730429A's three keep off speed change gear. Because the input shaft and the output shaft are parallel to each other and are not on the same axis, the axial size of the three-gear variable-speed transmission mechanism is relatively small, the overall size of the three-gear variable-speed transmission mechanism can be reduced to a certain degree, and the three-gear variable-speed transmission mechanism has good structural strength and low manufacturing cost. Three gears of the three-gear speed change transmission mechanism are not transmitted according to the rotating speed of 1:1, so that the rotating speed matching range is larger than that of a three-gear speed change device of CN 108730429A.

Drawings

Fig. 1 is a schematic structural view of the three-gear speed change transmission mechanism of the present invention in a neutral state.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the three-speed change transmission mechanism includes an input shaft 10 and an output shaft 5 which are parallel to each other, a first gear 6, a second gear 7 and a third gear 9 are sleeved on the input shaft 10, wherein the second gear 7 is connected with the input shaft 10 through a spline, and a shift fork groove 8 is formed in the second gear 7 along the circumferential direction. The first gear 6 and the third gear 9 are sleeved on the input shaft 10 in a hollow mode and are respectively located at and close to two ends of the second gear 7, internal teeth are arranged on the inner end face of the first gear 6 and the inner end face of the third gear 9, and after the second gear 7 is shifted towards the direction of the first gear 6, the second gear 7 can be meshed with the internal teeth of the first gear 6 simultaneously under the condition that the second gear 7 is kept in splined connection with the input shaft 10; when the second gear 7 is shifted in the direction of the third gear 9, the second gear 7 can simultaneously mesh with the internal teeth of the third gear 9 while maintaining the spline connection with the input shaft 10.

The output shaft 5 is sleeved with a fourth gear 4, a fifth gear 3 and a sixth gear 1, wherein the fifth gear 3 is sleeved on the output shaft 5 in an empty way, and the sixth gear 1 is provided with a shifting fork groove 2 along the circumferential direction. The fourth gear 4 and the sixth gear 1 are connected with the output shaft 5 through splines, and are respectively located at and close to two ends of the fifth gear 3, internal teeth are arranged on the end face of the fifth gear 3 close to one end of the sixth gear 1, and after the sixth gear 1 is shifted towards the direction of the fifth gear 3, the sixth gear 1 can be meshed with the internal teeth of the fifth gear 3 simultaneously under the state of keeping the splined connection with the output shaft 5.

The first gear 6 is in constant mesh with the fourth gear 4, the second gear 7 is in constant mesh with the fifth gear 3, and the third gear 9 is in constant mesh with the sixth gear 1.

The three-gear variable transmission mechanism can realize the transformation of three gears, and the working principle is that (taking a neutral gear position as an initial state):

firstly, the sixth gear 1 is shifted towards the fifth gear 3, so that the sixth gear 1 is meshed with the inner teeth of the fifth gear 3 under the state that the sixth gear is in splined connection with the output shaft 5, the second gear 7 and the input shaft 10 rotate synchronously, the second gear 7 drives the fifth gear 3 to rotate, and the fifth gear 3 drives the output shaft 5 to rotate through the sixth gear 1, so that the transmission of a first gear is completed.

And secondly, the second gear 7 is shifted towards the first gear 6, so that the second gear 7 is meshed with the internal teeth of the first gear 6 under the condition that the second gear is in splined connection with the input shaft 10, the first gear 6 rotates synchronously with the input shaft 10 through the second gear 7, and the output shaft 5 is driven to rotate through the fourth gear 4, and the transmission of a second gear is completed.

And thirdly, the second gear 7 is shifted towards the third gear 9, so that the second gear 7 is meshed with the internal teeth of the third gear 9 under the state that the second gear is kept in splined connection with the input shaft 10, the third gear 9 rotates synchronously with the input shaft 10 through the second gear 7, and the output shaft 5 is driven to rotate through the sixth gear 1, and the transmission of a third gear is completed.

Claims

1. A three-gear speed change transmission mechanism comprises an input shaft (10) and an output shaft (5) which are parallel to each other, and is characterized in that:

the input shaft is sleeved with a first gear (6), a second gear (7) and a third gear (9), the second gear is connected with the input shaft through splines, the first gear and the third gear are sleeved on the input shaft in an empty mode and are respectively located at and close to two ends of the second gear, and inner teeth capable of being meshed with the second gear are arranged on the inner end face of the first gear and the inner end face of the third gear;

a fourth gear (4), a fifth gear (3) and a sixth gear (1) are sleeved on the output shaft, the fifth gear is sleeved on the input shaft in an empty manner, the fourth gear and the sixth gear are connected with the output shaft through splines and are respectively positioned at and close to two ends of the fifth gear, and internal teeth capable of being meshed with the sixth gear are arranged on the end face of the fifth gear close to one end of the sixth gear;

the first gear (6) is in constant mesh with the fourth gear (4), the second gear (7) is in constant mesh with the fifth gear (3), the third gear (9) is in constant mesh with the sixth gear (1), and shifting fork grooves (8 and 2) are formed in the second gear and the sixth gear along the circumferential direction.