CN214248210U

CN214248210U - Double-gear structure

Info

Publication number: CN214248210U
Application number: CN202120072978.4U
Authority: CN
Inventors: 马先鹏
Original assignee: Dongguan Jiahang Industry Co ltd
Current assignee: Dongguan Jiahang Industry Co ltd
Priority date: 2021-01-12
Filing date: 2021-01-12
Publication date: 2021-09-21
Anticipated expiration: 2031-01-12

Abstract

The utility model relates to the technical field of gears, in particular to a double-gear structure, which comprises an external gear and an internal gear, wherein the middle part of the external gear is provided with a through connecting hole, and the middle part of the internal gear is provided with a through shaft hole; the outer part of the inner gear is provided with a plurality of outer teeth around the central line, the lower end of each outer tooth is provided with a step part, so that the outer teeth are divided into a first outer tooth at the upper end and a second outer tooth at the lower end, the inner wall of the connecting hole is provided with inner teeth meshed with the second outer tooth, and the second outer tooth and the inner teeth are mutually and fixedly meshed; the root of first outer tooth and second outer tooth is the link up structure, can be convenient for clear angle to the area of contact between second outer tooth and the internal gear can be increased with the cooperation of internal tooth, makes and to stabilize the cooperation between external gear and the internal gear, sets up the bevel gear on the external gear, sets up the planishing face with the upper end of bevel gear, can enough make things convenient for the clear angle of bevel gear root portion, can also realize mutually supporting with first outer tooth.

Description

Double-gear structure

Technical Field

The utility model relates to the technical field of gears, specifically be a double gear structure.

Background

In order to realize synchronous rotation of the gears, a plurality of gears are arranged on a shaft, so that synchronous rotation of the plurality of gears is realized, and a certain requirement is met, at present, in order to stabilize synchronous driving of double gears, two gears are combined together, when the double gears are used, the two gears are simultaneously connected with a transmission shaft, and the currently adopted combination mode is integrated molding or a fixed end 1 is arranged on one gear, as shown in fig. 1, and then the fixed end is welded with the other gear, the arrangement of the structure can cause that the root of the gear cannot be subjected to angle cleaning, particularly for the bevel gear, when the bevel gear is combined with a straight gear or the bevel gear is combined with the bevel gear, the inclination of the bevel gear increases the angle cleaning degree of the root, and a scheme is necessary to solve the problem.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an it is not enough to overcome above-mentioned condition, aims at providing the technical scheme that can solve above-mentioned problem.

In order to achieve the above object, the utility model provides a following technical scheme: a double-gear structure comprises an outer gear and an inner gear, wherein a through connecting hole is formed in the middle of the outer gear, and a through shaft hole is formed in the middle of the inner gear; the outer part of the inner gear is provided with a plurality of outer teeth around the central line, the lower end of each outer tooth is provided with a step part, so that the outer teeth are divided into a first outer tooth at the upper end and a second outer tooth at the lower end, the inner wall of the connecting hole is provided with inner teeth meshed with the second outer tooth, and the second outer tooth and the inner teeth are mutually and fixedly meshed; the upper end face of the outer gear is provided with a plurality of bevel teeth around the central line, and the upper portion of the bevel teeth is provided with a flat surface matched with the first outer teeth.

Preferably, the lateral part of the second outer tooth is two first arc-shaped surfaces and a second arc-shaped surface between the two first arc-shaped surfaces, the circle center of the second arc-shaped surface coincides with the central line of the inner gear, and the lateral part of the inner tooth is matched with the lateral part of the second outer tooth.

Preferably, the lower end of each second external tooth is provided with a first chamfer, and the first chamfer is positioned at the lower end of the second arc-shaped surface.

Preferably, the lower end of the outer gear is provided with a positioning groove, and the height from the top of the positioning groove to the upper end of the outer gear is equal to the height of the second outer teeth.

Preferably, the side wall of the positioning groove is an inclined surface, and the inclined surface has the same inclination with the bevel teeth.

Preferably, the side wall of the positioning groove is an inclined plane, and an annular ring is arranged on the inclined plane in a surrounding mode.

Preferably, the upper end of the internal gear is provided with a raised guard ring.

Preferably, the lower part of the bevel teeth is provided with a third arc-shaped surface, the third arc-shaped surface corresponds to the outer wall of the outer gear, and the upper end of the third arc-shaped surface is provided with a second chamfer.

Preferably, the number of external teeth and internal teeth is a multiple of 3.

Preferably, the number of the external teeth and the internal teeth is 9.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the outer teeth on the inner gear are divided into first outer teeth at the upper end and second outer teeth at the lower end by adopting the step parts through arranging the outer gear and the inner gear, and the second outer teeth are fixedly meshed with the inner teeth, so that the outer gear and the inner gear are detachably combined; the bevel teeth are arranged on the outer gear, the flat surface is arranged on the upper portions of the bevel teeth, so that the first outer teeth and the bevel teeth can be avoided, and the angle cleaning of the tooth root portions of the bevel teeth can be facilitated before the outer gear and the inner gear are not installed; through this design, the root of first outer tooth and the outer tooth of second is the through structure, can be convenient for clear angle to the cooperation of the outer tooth of second and internal tooth can increase the area of contact between outer gear and the internal gear, makes and to stabilize the cooperation between outer gear and the internal gear, sets up the bevel gear on the outer gear, sets up the planishing face with the upper end of bevel gear, can enough make things convenient for the clear angle of bevel gear tooth root portion, can also realize mutually supporting with first outer tooth.

Drawings

Fig. 1 is a schematic structural diagram of the prior art of the present invention;

fig. 2 is a schematic structural diagram of the present invention;

FIG. 3 is an exploded view of the structure of the present invention;

fig. 4 is a schematic cross-sectional structure of the present invention;

fig. 5 is a schematic structural diagram of the internal gear of the present invention.

The reference numerals and names in the figures are as follows:

10-external gear, 20-internal gear, 11-connecting hole, 12-bevel gear, 13-internal gear, 14-flat surface, 15-third arc surface, 16-second chamfer, 17-positioning groove, 18-inclined surface, 21-shaft hole, 22-external gear, 221-first external gear, 222-second external gear, 223-first arc surface, 224-second arc surface and 23-protective ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 5, in an embodiment of the present invention, a dual gear structure includes an external gear 10 and an internal gear 20, a through connection hole 11 is formed in a middle portion of the external gear 10, and a through shaft hole 21 is formed in a middle portion of the internal gear 20; the outer portion of the inner gear 20 is provided with a plurality of outer teeth 22 around a center line, a stepped portion is provided at a lower end of each outer tooth 22, so that the outer teeth 22 are divided into a first outer tooth 221 at an upper end and a second outer tooth 222 at a lower end, inner walls of the connection holes 11 are provided with inner teeth 13 engaged with the second outer teeth 222, and the second outer teeth 222 and the inner teeth 13 are fixedly engaged with each other; the upper end surface of the outer gear 10 is provided with a plurality of bevel teeth 12 around the center line, and the upper portion of the bevel teeth 12 is provided with a flat surface 14 fitted with the first outer teeth 221.

In the above technical means, by providing the external gear 10 and the internal gear 20, the external teeth 22 on the internal gear 20 are divided into the first external teeth 221 at the upper end and the second external teeth 222 at the lower end by using the stepped portion, and the second external teeth 222 are fixedly engaged with the internal teeth 13, thereby realizing the detachable combination of the external gear 10 and the internal gear 20; the bevel teeth 12 are arranged on the external gear 10, and the flat surface 14 is arranged on the upper part of the bevel teeth 12, so that the first external teeth 221 and the bevel teeth 12 can be avoided, and the root parts of the bevel teeth 12 can be cleaned conveniently before the external gear 10 and the internal gear 20 are not installed; through this design, the root of first outer tooth 221 and second outer tooth 222 is the through structure, can be convenient for clear angle, and the cooperation of second outer tooth 222 and internal tooth 13 can increase the area of contact between outer gear 10 and the internal gear 20, make and to stabilize the cooperation between outer gear 10 and the internal gear 20, set up bevel gear 12 on the outer gear 10, set up the upper end of bevel gear 12 flush plane 14, can enough make things convenient for the clear angle of bevel gear 12 root, can also realize mutually supporting with first outer tooth 221.

As further shown in fig. 5, the side portion of the second external tooth 222 is two first arc-shaped surfaces 223 and a second arc-shaped surface 224 between the two first arc-shaped surfaces 223, the center of the second arc-shaped surface 224 coincides with the center line of the internal gear 20, and the side portion of the internal tooth 13 and the side portion of the second external tooth 222 coincide with each other; through setting up first arcwall face 223 and second arcwall face 224, guarantee the width of the outer tooth 222 of second and the width myopia of internal tooth 13, make the outer tooth 222 of second and internal tooth 13 can have the same hardness, thereby guarantee that the outer tooth 222 of second and internal tooth 13 can carry out firm cooperation, and the centre of a circle of second arcwall face 224 coincides with the central line of internal gear 20, internal gear 20 is when rotating, the motion trail of first arcwall face 224 is along the vertical direction of first arcwall face 224, make first arcwall face 224 can drive internal tooth 13 with the maximum efficiency and rotate, thereby transmission torsion has been improved.

Further, a lower end of each of the second outer teeth 222 is provided with a first chamfer (not shown) at a lower end of the second arc-shaped face 224 to facilitate assembly of the outer gear 10 and the inner gear 20.

As further shown in fig. 4, the lower end of the external gear 10 is provided with a positioning groove 17, and the height from the top of the positioning groove 17 to the upper end of the external gear 10 is equal to the height of the second external teeth 222.

Further as shown in fig. 4, the side wall of the positioning slot 17 is an inclined surface 18, and the inclined surface 18 has the same inclination as the bevel gear 12.

As further shown in fig. 4, the side wall of the positioning slot 17 is an inclined surface 18, and an annular ring 19 is arranged around the inclined surface 18.

As further shown in fig. 2-3, the upper end of the internal gear 20 is provided with a raised guard ring 23.

As further shown in fig. 3, the lower portion of the teeth 12 is provided with a third arc-shaped surface 15, the third arc-shaped surface 15 corresponds to the outer wall of the external gear 10, and the upper end of the third arc-shaped surface 15 is provided with a second chamfer 16.

As shown in fig. 5, the number of the external teeth 22 and the internal teeth 13 is a multiple of 3.

As shown in fig. 5, the number of the outer teeth 22 and the number of the inner teeth 13 are 9.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A double-gear structure comprises an outer gear and an inner gear, wherein a through connecting hole is formed in the middle of the outer gear, and a through shaft hole is formed in the middle of the inner gear; the method is characterized in that:

the outer part of the inner gear is provided with a plurality of outer teeth around the central line, the lower end of each outer tooth is provided with a step part, so that the outer teeth are divided into a first outer tooth at the upper end and a second outer tooth at the lower end, the inner wall of the connecting hole is provided with inner teeth meshed with the second outer tooth, and the second outer tooth and the inner teeth are mutually and fixedly meshed; the upper end face of the outer gear is provided with a plurality of bevel teeth around the central line, and the upper portion of the bevel teeth is provided with a flat surface matched with the first outer teeth.

2. A dual gear arrangement according to claim 1, wherein: the lateral part of second external tooth is two first arcwall faces and the second arcwall face between two first arcwall faces, and the centre of a circle of second arcwall face coincides with the central line of internal gear, and the lateral part of internal tooth and the lateral part of second external tooth coincide each other.

3. A dual gear arrangement according to claim 2, wherein: the lower extreme of every second external tooth all is provided with first chamfer, and first chamfer is located the lower extreme of second arcwall face.

4. A dual gear arrangement according to claim 1, wherein: the lower extreme of outer gear is provided with the constant head tank, and the height that the top of constant head tank was gone up to the outer gear is highly equal with the height of second outer tooth.

5. A dual gear arrangement according to claim 4 wherein: the side wall of the positioning groove is an inclined plane, and the inclination of the inclined plane is the same as that of the bevel gear teeth.

6. A dual gear arrangement according to claim 5 wherein: the lateral wall of constant head tank is the inclined plane, and it is provided with annular circle to surround on the inclined plane.

7. A dual gear arrangement according to claim 1, wherein: the upper end of the inner gear is provided with a raised protection ring.

8. A dual gear arrangement according to claim 1, wherein: the lower part of each bevel tooth is provided with a third arc-shaped surface, the third arc-shaped surfaces correspond to the outer wall of the outer gear, and the upper end of each third arc-shaped surface is provided with a second chamfer.

9. A dual gear arrangement according to claim 1, wherein: the number of the external teeth and the internal teeth is a multiple of 3.

10. A dual gear arrangement according to claim 9 wherein: the number of the external teeth and the internal teeth is 9.