CN203272633U

CN203272633U - Multi-stage gear speed changer

Info

Publication number: CN203272633U
Application number: CN 201320299482
Authority: CN
Inventors: 翟军明
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-05-29
Filing date: 2013-05-29
Publication date: 2013-11-06
Anticipated expiration: 2023-05-29

Abstract

The utility model discloses a multi-stage gear speed changer which comprises a transmission mechanism and a speed changing mechanism. The transmission mechanism comprises a plurality of input gears of different sizes and a plurality of output gears of different sizes, wherein the input gears are installed on an input shaft and rotate at the same angular speed as the input shaft; the output gears are installed on an output shaft, and the number of the output gears is the same as that of the input gears; the input gears and the output gears are meshed two by two to form different transmission ratios. The speed changing mechanism comprises a spline on the head of the output shaft and a moving mechanism enabling the head of the output shaft and the spline to slide between the output gears. Due to the fact that the head of the output shaft and the spline slide between the output gears, different output gears can be chosen, and speed changing can be achieved. Gaps between components are small, the structure is compact, the speed changing speed is high, the speed changing mode is simple, on the same external structure space condition, the multi-stage gear speed changer can achieve more speed changing gears, is suitable for being popularized and used in a large scale, and is especially suitable for being used in the field of bicycle speed changing.

Description

The multistage gear-shift transmission

[technical field]

The utility model relates to a kind of speed changer.

[background technique]

Speed changer is can fix or stepping changes the gear drive of output shaft and input shaft velocity ratio, claims again gearbox.Speed changer is comprised of driving mechanism and gear.Driving mechanism adopts the ordinary gear transmission mostly, and gear generally adopts shifting slide gear and clutch etc.Shifting slide gear has dividing of multi-joint shifting slide gear and displacement shifting slide gear; With three shifting slide gear speed changes, axial dimension is large; With displacement shifting slide gear speed change, compact structure, but the velocity ratio variation is little; And when gear number is more, project organization is loaded down with trivial details bigger than normal with the design outline physical dimension, so be unfavorable for popularization and the use of speed-changing gear box; Novel infinitely variable transmission has solved the drawback of speed-changing gear box, but complex structure is with high costs, can't be universal in every field.

[summary of the invention]

The utility model provides a kind of compact structure for the defects of prior art, the simpler speed changer of gear shift mode.

In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:

The multistage gear-shift transmission, comprise driving mechanism and gear, described driving mechanism comprises and is arranged on input shaft several input gears that vary in size that rotate with angular velocity with input shaft, be arranged on several output gears that vary in size that equate with input gear quantity on output shaft, each input gear meshes in twos with output gear and forms different velocity ratios; Described gear comprises the spline of output shaft head, and the mobile mechanism that output shaft head and spline are slided between each output gear slides between each output gear by output shaft head and spline, selects different output gears, realizes speed change.

Further, have ball to connect between described output gear, ball is in gear side annular array.

Further, described spline is arranged in the keyway of output shaft head, between keyway and spline, spring is housed.

Further, described mobile mechanism comprises the thread groove on output shaft, is arranged on the speed change lever of output shaft end, and the position of speed change lever is fixed, and rotates speed change lever, and due to the effect of thread groove, output shaft head and spline slide between each output gear.

The utility model parts gap is little, compact structure, and speed change is fast, and gear shift mode is simpler, and under identical form structure spatial condition, its attainable gear number is more, is more suitable for using in spread, especially at aspects such as bicycle shifts.

[description of drawings]

Accompanying drawing 1 is plan view of the present utility model.

[embodiment]

Below in conjunction with embodiment, the utility model is described in further detail.

Multistage gear-shift transmission as shown in Figure 1, its driving mechanism comprise be arranged on input shaft a upper with 4 the input gear Ms that vary in size of input shaft with the angular velocity rotation, be arranged on 4 on the output shaft b output gear N that vary in size, each input gear meshes in twos with output gear and forms different velocity ratios, have ball 6 to connect between described output gear M, ball is in gear side annular array; Its gear comprises the spline 1 of output shaft b head, and spline 1 is arranged in the keyway 2 of output shaft b head, and spring 3 is housed between keyway and spline; Thread groove 4 is arranged on output shaft b, and speed change lever 5 is arranged on output shaft b end, and the position of speed change lever 5 is fixed, and rotates speed change lever 5, and due to the effect of thread groove 4, output shaft b head and spline 1 slide between each output gear M, thus the speed change of realization.

Below the utility model is described in detail, the above is only the preferred embodiment of the utility model, does not limit the utility model practical range, be allly to do impartial change and modify according to the application's scope, all should still belong in the utility model covering scope.

Claims

1. the multistage gear-shift transmission, comprise driving mechanism and gear, it is characterized in that:

Described driving mechanism comprises and is arranged on input shaft several input gears that vary in size that rotate with angular velocity with input shaft, be arranged on several output gears that vary in size that equate with input gear quantity on output shaft, each input gear meshes in twos with output gear and forms different velocity ratios;

Described gear comprises the spline of output shaft head, and the mobile mechanism that output shaft head and spline are slided between each output gear slides between each output gear by output shaft head and spline, selects different output gears, realizes speed change.

2. multistage gear-shift transmission as claimed in claim 1 is characterized in that: have ball to connect between described output gear, ball is in gear side annular array.

3. multistage gear-shift transmission as claimed in claim 1, it is characterized in that: described spline is arranged in the keyway of output shaft head, between keyway and spline, spring is housed.

4. multistage gear-shift transmission as claimed in claim 1, it is characterized in that: described mobile mechanism comprises the thread groove on output shaft, be arranged on the speed change lever of output shaft end, the position of speed change lever is fixed, rotate speed change lever, due to the effect of thread groove, output shaft head and spline slide between each output gear.