CN218236003U

CN218236003U - Speed reducer and electric tool

Info

Publication number: CN218236003U
Application number: CN202222622679.0U
Authority: CN
Inventors: 黄润林
Original assignee: Suzhou Duobei Tool Technology Co ltd
Current assignee: Suzhou Duobei Tool Technology Co ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-01-06
Anticipated expiration: 2032-09-30

Abstract

The utility model discloses a speed reducer and electric tool, the speed reducer includes: a motor; the inner gear ring is fixedly arranged on the motor, and a first speed reducing component linked with a driving shaft of the motor is arranged in the inner gear ring; the inner shell is arranged on the inner gear ring, and a second speed reducing assembly linked with the first speed reducing assembly is arranged on the inner shell; the motor, the inner gear ring and the inner shell are fixedly arranged in the shell. The electric tool comprises the speed reducer. The utility model discloses a reducing gear box casing is changed into the split type structure of interior tooth case and interior casing by integral, can reduce the degree of depth of installation cavity, and a plurality of first planetary gear trains of dismouting are more convenient, and the cooperation size precision of first planetary gear train and interior tooth case is higher. Meanwhile, due to the split design, the processing is more convenient, and the processing efficiency is higher.

Description

Speed reducer and electric tool

Technical Field

The utility model belongs to the technical field of electric tool, concretely relates to speed reducer and electric tool.

Background

The speed reducer and the electric tool drive the connecting rod to operate by utilizing the power provided by the motor through the transmission device, and the connecting rod operates to push and extrude rubber materials in the rubber tube to realize joint filling and repairing operation. Because the speed reducer and the electric tool need large thrust output in the process of pushing the rubber, the speed ratio of the speed reducer and the electric tool is generally set to be larger and can reach 5000-7000 usually, so that the speed reduction design of a five-stage or even more multi-stage planetary gear train is adopted, and the design of the multi-stage planetary gear train needs to take the assembling difficulty into consideration.

At present, the common design is that planetary gear trains of all stages are sequentially arranged in an integral type speed reducer shell, and the inner cavity of the speed reducer shell designed in such a way is deep, so that inconvenience is caused to the arrangement of the planetary gear trains of the previous stages.

Therefore, in order to solve the above-mentioned problems, it is necessary to provide a speed reducer and an electric power tool.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a speed reducer and an electric tool.

In order to achieve the above object, an embodiment of the present invention provides the following technical solutions:

a speed reducer, the speed reducer comprising:

a motor;

the inner gear ring is fixedly arranged on the motor, and a first speed reducing component linked with a driving shaft of the motor is arranged in the inner gear ring;

the inner shell is mounted on the inner gear ring, and a second speed reducing assembly linked with the first speed reducing assembly is mounted on the inner shell;

the motor, the inner gear ring and the inner shell are fixedly arranged inside the machine shell.

In one embodiment, the outer wall of the inner gear ring and the inner wall of the casing are provided with a limiting part and a limiting groove which are fixedly installed.

In one embodiment, an assembling portion is arranged on the surface of the inner shell facing the inner gear ring, a hollow assembling groove is formed in the assembling portion, and one end of the inner gear ring facing the inner shell is installed in the assembling groove.

In one embodiment, a limiting part is arranged on the outer wall of the inner gear ring, and the distance between the limiting part and the surface of the inner gear ring facing the inner shell is less than or equal to the depth of the assembling groove.

In one embodiment, a first mounting hole is formed in the surface of the inner gear ring facing the motor, and a protruding portion of the motor protrudes into the first mounting hole.

In one embodiment, a second mounting hole is formed in the surface of the inner gear ring facing the motor, and the inner gear ring is fixedly mounted with the motor through matching of a limiting piece and the second mounting hole.

In one embodiment, the casing includes a first casing and a second casing, and the first casing and/or the second casing are provided with the limiting groove.

In one embodiment, the first speed reduction assembly comprises a motor gear fixedly arranged on the driving shaft and a plurality of first planetary gear trains;

the second speed reduction assembly comprises a plurality of second planetary gear trains.

In one embodiment, the first speed reducing assembly includes three first planetary gear trains, the first planetary gear train includes a plurality of first planetary gears and a first planet carrier disposed on the first planetary gears, the first planetary gears of the first planetary gear train at the lowest layer are disposed between the motor gear and the inner gear ring, and the first planet carrier of the first planetary gear train at the uppermost layer protrudes into the inner housing.

The utility model discloses another embodiment provides a technical scheme as follows:

an electric tool comprising the speed reducer of any of the preceding embodiments.

The utility model discloses following beneficial effect has:

the utility model discloses a reducing gear box casing is changed into the split type structure of interior tooth case and interior casing by integral, can reduce the degree of depth of installation cavity, and a plurality of first planetary gear trains of dismouting are more convenient, and the cooperation size precision of first planetary gear train and interior tooth case is higher. Meanwhile, due to the split design, the processing is more convenient, and the processing efficiency is higher.

The utility model discloses simple structure, the repacking is convenient, easily installs, and the effect is showing, and convenient to popularize and use has very high practical value.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of an electric tool according to an embodiment of the present invention;

FIG. 2 isbase:Sub>A schematic cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic perspective view of the motor, the ring gear and the inner housing according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of the motor, the ring gear and the inner housing according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of an inner ring gear according to an embodiment of the present invention;

fig. 6 is a schematic top view of the ring gear according to an embodiment of the present invention;

fig. 7 is a schematic sectional view at B-B in fig. 6.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of this application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, and are only for the convenience of description of the present invention and simplification of description, but do not indicate or imply that the equipment or element which is referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the embodiments of the present invention, it should be noted that the terms "first", "second", and the like as used herein do not mean to refer to an order or sequence, and are not intended to limit the present disclosure, but only to distinguish components or operations described in the same technical terms.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The technical solution of the present invention will be described below with reference to the accompanying drawings.

Referring to fig. 1 and 3, a speed reducer according to an embodiment of the present invention includes a motor 1, an inner gear ring 2, an inner casing 3, and a casing 4.

Specifically, referring to fig. 4, the motor 1 in the present embodiment has a drive shaft 11. The inner gear ring 2 is fixedly arranged on the motor 1, and a first speed reducing component 21 linked with the driving shaft 11 of the motor 1 is arranged inside the inner gear ring 2. And the inner shell 3 is arranged on the inner gear ring 2, and the inner shell is provided with a second speed reducing component 31 linked with the first speed reducing component 21. The machine shell 4, the motor 1, the inner gear ring 2 and the inner shell 3 are fixedly arranged in the machine shell 4.

According to the design, the original integrated reduction gearbox shell is designed into two components of the inner gear ring 2 and the inner shell 3 in a split mode, the first speed reduction component 21 is fixedly installed in the inner gear ring 2, and the second speed reduction component 31 is installed in the inner shell 3, so that the problem that the multistage planetary gear train is difficult to assemble is solved.

In an exemplary embodiment, referring to fig. 2, the outer wall of the ring gear 2 and the inner wall of the housing 4 are provided with a fixed limiting portion 22 and a fixed limiting groove 41. In the embodiment, the outer wall of the ring gear 2 is provided with the limiting part 22, the inner wall of the casing 4 is provided with the limiting groove 41, and the ring gear 2 is axially positioned in the casing 4 by the mutual matching of the limiting part 22 and the limiting groove 41.

Above utility model is not limited to this, if be equipped with spacing portion 22 on the inner wall of casing 4, set up on the 2 outer walls of ring gear with the spacing boss of this spacing portion 22 matched with, also can realize the effect in 2 fixed joints of ring gear and casing 4, this is that technical personnel in the field can understand and accept.

In an exemplary embodiment, referring to fig. 2, the housing 4 in this embodiment includes a first housing and a second housing, and the first housing and/or the second housing is provided with a limiting groove 41.

Preferably, the first housing and the second housing in this embodiment are provided with two opposite limiting grooves 41, the outer wall of the ring gear 2 is provided with a limiting portion 22 installed in cooperation with the limiting grooves 41, and the ring gear 2 is axially positioned in the housing 4 by the cooperation of the two limiting grooves 41 and the two limiting portions 22, so that when the motor 1 drives the first speed reducing assembly 21 to rotate, the ring gear 2 also rotates in the housing 4 along with the rotation of the first speed reducing assembly 21 therein, which affects the normal operation of the speed reducer.

Further, the above utility model is not limited to this, the number of the limiting grooves 41 and the limiting portions 22 is not limited to two, the limiting grooves 41 may be designed on the first casing or the second casing, the number of the limiting portions 22 may be one or three or four, etc. any number that can be installed in cooperation with the limiting grooves 41, the number of the limiting grooves 41 may be one or three or four, etc. any number that can be installed in cooperation with the limiting portions 22, which can be understood and accepted by those skilled in the art.

In an exemplary embodiment, as shown in fig. 4, a surface of the inner housing 3 facing the ring gear 2 in this embodiment is provided with a fitting portion in which a hollow fitting groove is formed, and one end of the ring gear 2 facing the inner housing 3 is fitted in the fitting groove.

According to the design, the inner shell 3 and the inner gear ring 2 can be installed in a matching mode in an alignment mode, the installation position between the first speed reducing assembly 21 and the second speed reducing assembly 31 can be conveniently determined, and the phenomenon that deviation occurs between all levels of planetary gear trains is avoided, so that the speed reducer cannot work normally is avoided.

Further, the inner housing 3 further includes a mounting portion fixedly mounted on the housing 4, a mounting portion communicated with the mounting portion is formed in the mounting portion, and a second speed reducing assembly 31 is fixedly mounted in the mounting portion. Wherein, the outer wall of installation department and the inside joint cooperation of casing 4, according to the design, can realize the fixed of interior casing 3 position in casing 4.

In an exemplary embodiment, referring to fig. 5 in combination with fig. 4, a surface of the ring gear 2 facing the motor 1 in the present embodiment is provided with a first mounting hole 23, and the protrusion 12 of the motor 1 protrudes into the first mounting hole 23. The inner diameter of the first mounting hole 23 is larger than or equal to the outer diameter of the protruding part 12 of the motor 1, so that the protruding part 12 of the motor 1 can be protruded or clamped in the first mounting hole 23, and the protruding part 12 of the motor 1 is always positioned in the first mounting hole 23.

According to the design, the motor gear 211 is convenient to be fixedly arranged on the driving shaft 11, meanwhile, the interference between the convex part 12 of the motor 1 and the lower surface of the first speed reducing assembly 21 is avoided, and the first planetary gear train 212 is prevented from being blocked in the moving process to influence the movement of the first planetary gear train 212.

In an exemplary embodiment, referring to fig. 6 in combination with fig. 4, a second mounting hole 24 is provided on a surface of the ring gear 2 facing the motor 1 in the present embodiment, and the ring gear 2 is fixedly mounted with the motor 1 through a limiting member 25 and the second mounting hole 24.

Further, referring to fig. 7 in combination with fig. 4, the second mounting hole 24 in the embodiment is a countersunk hole, the limiting member 25 is mounted in the second mounting hole 24, and the limiting member 25 is always located in the countersunk hole and does not contact with the lower surface of the first decelerating component 21.

According to the design, the motor 1 and the inner gear ring 2 are conveniently and fixedly mounted, the power of the motor 1 is favorably transmitted to an external component through a plurality of stages of planetary gear trains, meanwhile, the interference between the limiting piece 25 and the lower surface of the first speed reducing component 21 is avoided, and the first planetary gear train 212 is prevented from being blocked in the motion process to influence the motion of the first planetary gear train 212.

In an exemplary embodiment, the first speed reducing assembly 21 in this embodiment includes a motor gear 211 fixedly mounted on the driving shaft 11 and a plurality of first planetary gear trains 212; the second reduction assembly 31 includes a plurality of second planetary gear trains 311. The purpose of speed reduction is achieved through linkage of a plurality of first planetary gear trains 212 and a plurality of second planetary gear trains 311 (see fig. 1).

In an exemplary embodiment, the inner side wall of the inner gear ring 2 in this embodiment is provided with the tooth sockets 26 matched with the first planetary gear trains 212, which is beneficial to improving the transmission effect of the plurality of first planetary gear trains 212.

In an exemplary embodiment, first planetary gear set 212 in this embodiment includes a plurality of first planet gears 2121 and a first carrier 2122 (see fig. 4) disposed on first planet gears 2121. The first planetary gears 2121 and the first planet carrier 2122 can rotate relatively with the operation of the motor 1, and meanwhile, the first planet carrier 2122 is driven to rotate around the axis of the motor 1 during the rotation of the first planetary gears 2121 with the motor 1.

The second planetary gear train 311 includes a plurality of second planetary gears 3111 and a second carrier 3112 (see fig. 1) provided on the second planetary gears 3111. The second planetary gear 3111 and the second planetary carrier 3112 can rotate relatively with the motor 1, and meanwhile, in the process that the second planetary gear 3111 rotates with the motor 1, the second planetary gear 3112 is driven to rotate around the axis of the motor 1.

Referring to fig. 4 in combination with fig. 1, the first speed reducing assembly 21 includes three stages of first planetary gear trains 212, the first planetary gears 2121 of the lowermost first planetary gear train 212 are provided between the motor gear 211 and the ring gear 2, and the first carrier 2122 of the uppermost first planetary gear train 212 protrudes into the inner housing 3 and is engaged with the second planetary gears 3111 of the lowermost second planetary gear train 311.

According to the design, the aim of speed reduction can be achieved through linkage and matching among the multiple stages of planetary gear trains.

Further, the number of the first planetary gear trains 212 in the above embodiment is not limited thereto, and the number of the first planetary gear trains 212 and the second planetary gear trains 311 needs to be determined according to the deceleration effect that the reducer is intended to achieve, which can be understood and accepted by those skilled in the art.

Referring to fig. 1, the present invention further provides an electric tool having the speed reducer of any of the above embodiments, wherein the housing 4 of the electric tool in this embodiment is the housing 4 of the speed reducer. In a preferred embodiment, the power tool may be an electric glue gun.

Further, the casing 4 in the above embodiment may also be an outer casing provided outside the casing 4 of the speed reducer, which can be understood and accepted by those skilled in the art.

According to the technical scheme provided by the utility model, the utility model discloses following beneficial effect has:

the utility model discloses a reducing gear box casing is changed into the split type structure of interior gearbox and interior casing by the integral, can reduce the degree of depth of installation cavity, and a plurality of first planetary gear trains of dismouting are more convenient, and the cooperation size precision of first planetary gear train and interior gearbox is higher. Meanwhile, due to the split design, the processing is more convenient, and the processing efficiency is higher.

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.

Furthermore, it should be understood that although the specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as would be understood by those skilled in the art from the specification and claims herein.

Claims

1. A speed reducer, characterized in that the speed reducer comprises:

a motor;

the inner shell is arranged on the inner gear ring, and a second speed reducing assembly linked with the first speed reducing assembly is arranged on the inner shell;

2. The reducer according to claim 1, wherein the outer wall of the inner gear ring and the inner wall of the housing are provided with a limiting part and a limiting groove which are fixedly installed.

3. The speed reducer according to claim 1, wherein a fitting portion is provided on a surface of the inner housing facing the ring gear, a hollow fitting groove is formed in the fitting portion, and an end of the ring gear facing the inner housing is mounted in the fitting groove.

4. The speed reducer according to claim 3, wherein a limiting part is arranged on an outer wall of the inner gear ring, and a distance between the limiting part and a surface of the inner gear ring facing the inner housing is smaller than or equal to the depth of the assembling groove.

5. The reducer according to claim 1, wherein a first mounting hole is formed in a surface of the ring gear facing the motor, and a protruding portion of the motor protrudes into the first mounting hole.

6. The reducer according to claim 1, wherein a second mounting hole is formed in a surface of the ring gear facing the motor, and the ring gear is fixedly mounted to the motor through a limiting member and the second mounting hole.

7. The reducer according to claim 2, wherein the housing comprises a first housing and a second housing, and the first housing and/or the second housing is provided with the limiting groove.

8. The speed reducer according to claim 1, wherein the first reduction assembly comprises a motor gear fixedly mounted on the drive shaft and a plurality of first planetary gear trains;

9. A reducer according to claim 8, wherein the first reduction assembly includes three first planetary gear trains including a plurality of first planetary gears and a first carrier provided on the first planetary gears, the first planetary gears of the lowermost first planetary gear train being provided between the motor gear and the ring gear, the first carrier of the uppermost first planetary gear train projecting into the inner housing.

10. An electric tool comprising the speed reducer according to any one of claims 1 to 9.