CN210162218U

CN210162218U - Bicycle gear transmission mechanism

Info

Publication number: CN210162218U
Application number: CN201920634100.8U
Authority: CN
Inventors: 盛永瑞
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-06
Filing date: 2019-05-06
Publication date: 2020-03-20
Anticipated expiration: 2029-05-06

Abstract

The utility model relates to a bicycle gear drive. The utility model aims at providing a bicycle gear drive mechanism that stability is good, easy dismounting, maintenance are easy to the weak point that poor stability, dismouting inconvenient, the maintenance degree of difficulty that current bicycle drive mechanism exists. The utility model discloses a gear change mechanism, a rotating shaft, drive gear, output gear, support and wheel hub, wherein, gear change mechanism includes the driving gear, driven gear, clutch, mandrel and inner ring, clutch assembles in driven gear's shaft hole, clutch overlaps on the inner ring with the driving gear in proper order, the inner ring cover is on the mandrel, the mandrel is installed on the support, output gear fixed mounting is on wheel hub, output gear meets with the support through bearing two, output gear meshes with driven gear mutually, wheel hub passes through bearing three and installs in the pivot, drive gear fixed mounting is in the pivot, drive gear meshes with the driving gear mutually, the pivot is installed on the support.

Description

Bicycle gear transmission mechanism

Technical Field

The utility model belongs to the bicycle field, concretely relates to bicycle gear drive.

Background

Along with the continuous improvement of people's standard of living, the requirement to health promotes gradually, also because of motor vehicles are too much simultaneously, easily take place the traffic congestion, the bicycle becomes the selection of most people's short distance trip gradually like this, transmission system is the important component part of bicycle, the transmission system that current bicycle adopted is mostly chain drive system, fall the chain easily during riding, when going uphill or the highway section of traffic complicacy in particular, fall the consequence that the chain brought and can't imagine, so propose a bicycle gear drive and have realistic meaning.

Disclosure of Invention

The utility model aims at providing a poor stability, the inconvenient, the high weak point of the maintenance degree of difficulty that exist to current bicycle drive mechanism, provide a simple structure, stability is good, easy dismounting, maintenance are easy bicycle gear drive mechanism.

The utility model discloses a technical scheme accomplish through following mode: the utility model provides a bicycle gear drive, including gear change mechanism, the apparatus further comprises a rotating shaft, drive gear, output gear, support and wheel hub, wherein, gear change mechanism includes the driving gear, driven gear, clutch, mandrel and inner ring, clutch assembles in driven gear's shaft hole, clutch overlaps on the inner ring with the driving gear in proper order, the inner ring overlaps on the mandrel, between driving gear and the inner ring, be interference fit between inner ring and the mandrel, the mandrel is installed on the support, output gear fixed mounting is on wheel hub, output gear meets with the support through bearing two, output gear meshes with driven gear mutually, wheel hub passes through bearing three and installs in the pivot, drive gear fixed mounting is in the pivot, drive gear meshes with the driving gear mutually, the pivot is installed on the support.

In the bicycle gear transmission mechanism, one end of the clutch mechanism and one end of the driven gear are connected with the convex shoulder of the inner ring, and the other end of the clutch mechanism and the other end of the driven gear are connected with one end of the driving gear.

In the bicycle gear transmission mechanism, the mandrel is arranged on the bracket through the first bearing, and the two ends of the mandrel are provided with the first snap springs.

In the bicycle gear transmission mechanism, the rotating shaft is arranged on the bracket through a bearing IV, and two ends of the rotating shaft are provided with clamp springs II.

In the bicycle gear transmission mechanism, the gear speed change mechanism, the driving gear and the output gear are positioned on the right side of the rotating shaft, an end cover is arranged on the outer side of the bearing four positioned on the left side of the rotating shaft, and the end cover is fixed on a bracket on the left side of the bicycle through a bolt.

A bicycle gear drive in, drive gear with the pivot between adopt spline fit structure, wherein, establish the spline on the pore wall in the drive gear shaft hole for the internal spline, establish the spline on the pivot lateral surface for the external spline, establish the internal spline on the pore wall in the drive gear shaft hole and establish for the static fit between the external spline on the pivot lateral surface.

In the bicycle gear transmission mechanism, the output gear and the hub are in spline fit structure, wherein the splines arranged on the hole wall in the output gear shaft hole are internal splines, the splines arranged on the outer side surface of the hub are external splines, and the internal splines arranged on the hole wall in the output gear shaft hole are in static fit with the external splines arranged on the outer side surface of the hub.

In the gear transmission mechanism for a bicycle, the clutch mechanism is one of a sprag type one-way clutch, a roller type one-way clutch and a ratchet type one-way clutch.

Compared with the prior art, the utility model, have following characteristics:

1. stability is high, and bicycle gear drive adopts the gear as driven essential element for compare in chain drive, make the fault rate reduce.

2. The dismouting is convenient, bicycle gear drive's structure for the installation is very convenient with the dismantlement.

3. The maintenance is simple, the bicycle gear transmission mechanism has good transmission sealing lubrication, and the time spent on the maintenance is shorter than that spent on the maintenance of a chain transmission mechanism.

Drawings

Fig. 1 is a schematic structural view of a gear transmission mechanism of a bicycle according to the present invention.

Fig. 2 is a schematic structural view of the gear change mechanism.

Fig. 3 is a perspective view of the gear change mechanism.

Fig. 4 is an exploded view of the gear change mechanism.

Fig. 5 is a schematic structural view of the bicycle gear transmission mechanism of the present invention assembled on a bicycle.

In fig. 1 to 5, 1 denotes a gear change mechanism; 1a represents a drive gear; 1b represents a driven gear; 1c represents a clutch mechanism; 1d represents a mandrel; 1e represents an inner ring; 1e1 denotes a shoulder; 2 denotes a rotating shaft; 3 denotes a drive gear; 4 denotes an output gear; 5 denotes a stent; 6 represents a hub; 7 denotes a bearing I; 8 represents a clamp spring I; 9 denotes a second bearing; 10 denotes a bearing three; 11 denotes a sleeve; 12 denotes bearing four; 13 denotes a circlip two; 14 denotes an end cap; and 15 denotes a bolt.

Detailed Description

The present invention will be further explained below by way of examples with reference to the accompanying drawings.

Referring to the attached drawings 1 to 5, a bicycle gear transmission mechanism comprises a gear speed change mechanism 1, a rotating shaft 2, a driving gear 3, an output gear 4, a bracket 5 and a hub 6, wherein the gear speed change mechanism 1 comprises a driving gear 1a, a driven gear 1b, a clutch mechanism 1c, a mandrel 1d and an inner ring 1e, the clutch mechanism 1c is assembled in a shaft hole of the driven gear 1b, the clutch mechanism 1c and the driving gear 1a are sequentially sleeved on the inner ring 1e, one ends of the clutch mechanism 1c and the driven gear 1b are connected with a convex shoulder 1e1 of the inner ring 1e, the other ends of the clutch mechanism 1c and the driven gear 1b are connected with one end of the driving gear 1a, and the clutch mechanism 1c is one of a wedge type one-way clutch, a roller type one-way clutch and a ratchet type one-way clutch; the inner ring 1e is sleeved on the mandrel 1d, the driving gear 1a and the inner ring 1e are in interference fit, the inner ring 1e and the mandrel 1d are in interference fit, the mandrel 1d is installed on the support 5 through a bearing I7, and clamp springs I8 are arranged at two ends of the mandrel 1 d; the output gear 4 is fixedly arranged on a hub 6, and a spline matching structure is adopted between the output gear 4 and the hub 6, wherein a spline on a hole wall in a shaft hole of the output gear 4 is an internal spline, a spline on the outer side surface of the hub 6 is an external spline, and the internal spline on the hole wall in the shaft hole of the output gear 4 is in static fit with the external spline on the outer side surface of the hub 6; the output gear 4 is connected with the bracket 5 through a second bearing 9, the output gear 4 is meshed with the driven gear 1b, and the hub 6 is arranged on the rotating shaft 2 through a third bearing 10; the driving gear 3 is fixedly arranged on the rotating shaft 2, and a spline matching structure is adopted between the driving gear 3 and the rotating shaft 2, wherein a spline on a hole wall in a shaft hole of the driving gear 3 is an internal spline, a spline on the outer side surface of the rotating shaft 2 is an external spline, and the internal spline on the hole wall in the shaft hole of the driving gear 3 is in static fit with the external spline on the outer side surface of the rotating shaft 2; the driving gear 3 is meshed with the driving gear 1a, the rotating shaft 2 is installed on the bracket 5 through a bearing IV 12, and two ends of the rotating shaft 2 are provided with clamp springs II 13; in this bicycle gear transmission, the gear change mechanism 1, the drive gear 3 and the output gear 4 are located on the right side of the rotating shaft 2, an end cover 14 is provided on the outer side of a bearing four 12 located on the left side of the rotating shaft 2, and the end cover 14 is fixed to the bracket 5 on the left side of the bicycle by a bolt 15.

The utility model relates to a bicycle gear drive's theory of operation as follows: when the rotating shaft 2 is driven, the rotating shaft 2 drives the driving gear 3 to rotate, the driving gear 3 drives the driving gear 1a to rotate, the driven gear 1b does not move, the rotating speed of the driving gear 1a is greater than that of the driven gear 1b, the clutch mechanism 1c is closed, the driven gear 1b rotates along with the clutch mechanism, and the driven gear 1b drives the output gear 4 and the hub 6 to rotate; when the rotating shaft 2 is not driven and the hub 6 rotates inertially, the hub 6 and the output gear 4 rotate, the output gear 4 drives the driven gear 1b to rotate, at the moment, the rotating shaft 2 does not move, meanwhile, the driving gear 3 and the driving gear 1a do not move, the rotating speed of the driven gear 1b is greater than that of the driving gear 1a, the clutch mechanism 1c is separated, the driven gear 1b cannot drive the driving gear 1a to rotate, and the rotating shaft 2 of the transmission mechanism keeps not rotating when the bicycle slides.

The above description is only a preferred embodiment of the present invention, but not intended to limit the scope of the invention, and all the equivalent changes and modifications made in the claims and the specification of the present invention are within the scope of the present invention.

Claims

1. The utility model provides a bicycle gear drive, this bicycle gear drive of its characterized in that includes gear speed change mechanism, the apparatus further comprises a rotating shaft, drive gear, output gear, support and wheel hub, wherein, gear speed change mechanism includes the driving gear, driven gear, clutching mechanism, mandrel and inner ring, clutching mechanism assembles in driven gear's shaft hole, clutching mechanism overlaps on the inner ring with the driving gear in proper order, the inner ring overlaps on the mandrel, between driving gear and the inner ring, be interference fit between inner ring and the mandrel, the mandrel is installed on the support, output gear fixed mounting is on wheel hub, output gear meets with the support through bearing two, output gear meshes with driven gear mutually, wheel hub installs in the pivot through bearing three, drive gear fixed mounting is in the pivot, drive gear meshes with the driving gear mutually, the pivot is installed on the support.

2. A bicycle gear transmission according to claim 1, wherein one end of said clutch mechanism and said driven gear engages a shoulder of said inner ring, and the other end of said clutch mechanism and said driven gear engages an end of said drive gear.

3. A bicycle gear transmission according to claim 1 or 2, wherein the spindle is mounted on the frame by means of a first bearing, and a first snap spring is provided at each end of the spindle.

4. A bicycle gear transmission according to claim 1 or 2, wherein the shaft is mounted on the frame by means of a bearing assembly, and two snap springs are provided at the two ends of the shaft.

5. A bicycle gear transmission according to claim 4, wherein the gear change mechanism, the drive gear and the output gear are located on the right side of the shaft, and an end cap is provided on the outer side of the bearing four located on the left side of the shaft, and the end cap is fixed to the bracket on the left side of the bicycle by bolts.

6. A bicycle gear transmission mechanism according to claim 1 or 2, wherein the driving gear and the rotation shaft are engaged by a spline, wherein the spline on the wall of the hole in the driving gear shaft hole is an internal spline, the spline on the outer side of the rotation shaft is an external spline, and the internal spline on the wall of the hole in the driving gear shaft hole is in static engagement with the external spline on the outer side of the rotation shaft.

7. A bicycle gear transmission according to claim 1 or 2, wherein the output gear and the hub are in a spline fit, wherein the splines on the wall of the hole in the output gear shaft are internal splines, the splines on the outer side of the hub are external splines, and the internal splines on the wall of the hole in the output gear shaft and the external splines on the outer side of the hub are in an interference fit.

8. A bicycle gear transmission according to claim 1 or 2, wherein the clutch mechanism is one of a sprag type one-way clutch, a roller type one-way clutch and a ratchet type one-way clutch.