CN209762179U

CN209762179U - Transmission gear

Info

Publication number: CN209762179U
Application number: CN201920495226.1U
Authority: CN
Inventors: 林明高
Original assignee: ZHEJIANG DAFA GEAR CO Ltd
Current assignee: ZHEJIANG DAFA GEAR CO Ltd
Priority date: 2019-04-12
Filing date: 2019-04-12
Publication date: 2019-12-10
Anticipated expiration: 2029-04-12

Abstract

The utility model provides a derailleur gear belongs to machine-building technical field. It has solved the poor, troublesome scheduling problem of dismouting of current combination formula derailleur gear locking nature. The transmission gear comprises an outer gear ring and an inner gear ring, wherein outer gear teeth are processed on the outer peripheral surface of the outer gear ring, a shaft hole platform is arranged at the center of the outer gear ring, inner gear teeth are arranged on the inner end wall of the outer gear ring, at least one connecting hole is formed in the body of the outer gear ring, a shaft sleeve protruding in the axial direction is arranged at the center of the inner gear ring, locking teeth meshed and matched with the inner gear teeth are arranged on the outer end surface of the inner gear ring, and connecting blocks matched with the connecting holes are arranged on the body of the inner. The utility model has the advantages of convenient disassembly and assembly and good radial locking performance.

Description

Transmission gear

Technical Field

The utility model belongs to the technical field of the machine-building, a gear, in particular to derailleur gear is related to.

Background

The gear is a mechanical element which has teeth on a wheel rim and can continuously mesh to transmit motion and power, is mainly applied to a transmission shaft and a speed changer, mainly plays a role in power transmission in the transmission shaft, and realizes the speed change function of the speed changer by adopting a multi-stage gear combination mode in the speed changer.

Most of gears in the existing market are manufactured by adopting an integrated forming method, and due to the stress difference between the gears, the wear degrees caused by the stress difference are different, and when any one gear on the gear is damaged, the whole gear is scrapped, so that the problems of increased use cost and the like are caused.

Disclosure of Invention

The utility model aims at providing a with low costs, make things convenient for dismouting, the good derailleur gear of radial locking nature to the above-mentioned problem that exists among the prior art.

The purpose of the utility model can be realized by the following technical proposal: a transmission gear comprises an outer gear ring and an inner gear ring and is characterized in that outer gear teeth are machined on the outer peripheral surface of the outer gear ring, a shaft hole table is arranged at the center of the outer gear ring, inner gear teeth are arranged on the inner end wall of the outer gear ring, at least one connecting hole is formed in the body of the outer gear ring, an axially protruding shaft sleeve is arranged at the center of the inner gear ring, locking teeth meshed with the inner gear teeth are arranged on the outer end face of the inner gear ring, and connecting blocks matched with the connecting holes are arranged on the body of the inner gear ring.

The technical effects of the utility model are that: the transmission gear is formed by assembling an outer gear ring and an inner gear ring, the inner gear ring is provided with locking teeth and a connecting block, the outer gear ring is provided with inner gear teeth and a connecting hole, when the inner gear ring needs to be assembled with the outer gear ring, the locking teeth on the inner gear ring can be meshed with the inner gear teeth to prevent the inner gear teeth from deflecting axially, and then the further fixation is realized through the matching of the connecting block and the connecting block, so that the outer gear ring and the inner gear ring reach stable working states.

In the transmission gear, the inner end surface of the outer gear ring is provided with a retainer extending radially inward, and a reinforcing rib is connected between the retainer and the shaft hole platform.

In the above-described transmission gear, the number of the coupling holes is 2.

In the transmission gear, the inner gear teeth are distributed on 1/4 of the circumference of the inner ring of the inner gear ring.

In the transmission gear, the central interval between the two connecting holes and the inner gear teeth is 120 degrees.

In the transmission gear, the tooth diameter length of the locking teeth is smaller than the ring diameter of the retainer, so that when the inner gear ring is matched with the outer gear ring, the inner end surface of the inner gear ring is abutted against the retainer.

Compared with the prior art, the transmission gear is formed by assembling the inner gear ring and the outer gear ring, is combined and fixed in a tooth-shaped meshing and block inserting mode, and has the advantages of convenience in disassembly and assembly and good radial locking performance.

Drawings

Fig. 1 is a schematic view of the general structure of an outer ring gear in the gear of the present transmission.

Fig. 2 is a schematic diagram of the general structure of the ring gear in the gear of the present transmission.

Fig. 3 is a structural sectional view of an outer ring gear in the gear of the present transmission.

Fig. 4 is a partial structural view of an outer ring gear in the gear of the present transmission.

In the figure, 1, an outer gear ring; 2. an inner gear ring; 3. outer gear teeth; 4. a shaft hole table; 5. inner gear teeth; 6. connecting holes; 7. a shaft sleeve; 8. a locking tooth; 9. connecting blocks; 10. a retainer; 11. and (5) reinforcing ribs.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 4, the transmission gear comprises an outer gear ring 1 and an inner gear ring 2, outer gear teeth 3 are processed on the outer peripheral surface of the outer gear ring 1, a shaft hole platform 4 is arranged at the center of the outer gear ring, inner gear teeth 5 are arranged on the inner end wall of the outer gear ring 1, at least one connecting hole 6 is formed in the body of the outer gear ring 1, a shaft sleeve 7 protruding in the axial direction is arranged at the center of the inner gear ring 2, locking teeth 8 meshed and matched with the inner gear teeth 5 are arranged on the outer end surface of the inner gear ring 2, and connecting blocks 9 matched with the connecting holes 6 are arranged on the body of the inner gear teeth 5.

More specifically, a retainer 10 extending radially inward is provided on an inner end surface of the outer ring gear 1, and a reinforcing rib 11 is connected between the retainer 10 and the shaft hole boss 4. The strength of the outer ring gear 1 as a whole is improved.

More specifically, the number of the connection holes 6 is 2.

In more detail, the inner gear teeth 5 are distributed on 1/4 of the circumference of the inner ring of the inner gear ring 2.

In more detail, the center interval between the two coupling holes 6 and the inner gear teeth 5 is 120 degrees.

In more detail, the length of the tooth diameter of the locking tooth 8 is smaller than the diameter of the retainer 10, so that when the inner gear ring 2 is matched with the outer gear ring 1, the inner end surface of the inner gear ring 2 is abutted against the retainer 10. The stability of the connection of the inner gear ring 2 and the outer gear ring 1 is improved.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of outer ring gear 1, inner ring gear 2, outer ring gear 3, shaft boss 4, inner ring gear 5, connecting hole 6, bushing 7, locking teeth 8, connecting block 9, retainer 10, reinforcing ribs 11, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a transmission gear, includes outer ring gear (1) and ring gear (2), its characterized in that, outer ring gear (1) on the outer peripheral face on process and to have outer teeth of a cogwheel (3), its center department is provided with axle hole platform (4), inner teeth of a cogwheel (5) have on the inner end wall of outer ring gear (1), the body of outer ring gear (1) on seted up at least one connecting hole (6), the center of ring gear (2) have axial bellied axle sleeve (7), have on the outer terminal surface of ring gear (2) with inner teeth of a cogwheel (5) engaged with locking tooth (8), the body of inner teeth (5) on be provided with connecting block (9) with connecting hole (6) matched with.

2. A transmission gear according to claim 1, characterised in that the outer ring gear (1) is provided with a radially inwardly extending cage (10) at its inner end face, and that a reinforcement (11) is connected between the cage (10) and the boss (4).

3. A transmission gear according to claim 1, characterised in that the number of said connection holes (6) is 2.

4. A transmission gear according to claim 1, characterised in that the distribution of the internal gear teeth (5) is over 1/4 of the circumference of the inner ring of the ring gear (2).

5. A transmission gear according to claim 1, characterised in that the central spacing between the two coupling holes (6) and the internal gear teeth (5) is 120 degrees.

6. A transmission gear according to claim 2, wherein the locking teeth (8) have a smaller tooth diameter than the diameter of the retainer (10) so that the inner end surface of the inner ring gear (2) abuts against the retainer (10) when the inner ring gear (2) is fitted to the outer ring gear (1).