CN212775448U - Gear and output shaft assembly structure and speed reduction motor using same - Google Patents
Gear and output shaft assembly structure and speed reduction motor using same Download PDFInfo
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- CN212775448U CN212775448U CN202021363725.4U CN202021363725U CN212775448U CN 212775448 U CN212775448 U CN 212775448U CN 202021363725 U CN202021363725 U CN 202021363725U CN 212775448 U CN212775448 U CN 212775448U
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Abstract
The utility model discloses a gear and output shaft assembly structure and use its gear motor, include: a gear and an output shaft adapted for assembly, the gear having a central through bore; the gear is also provided with a connecting part communicated with the central through hole; the connecting part is provided with a central hole which is coaxially communicated with the central through hole, and a pin shaft groove which is communicated with the central hole is arranged in the connecting part along the radial direction of the gear; the output shaft is penetratingly inserted into the central through hole; an assembly hole penetrates through the output shaft along the radial direction of the output shaft, and a positioning pin shaft suitable for being embedded into the pin shaft groove penetrates through the assembly hole; and a knurling structure is further arranged on the part, matched with the central through hole, of the circumferential outer side wall of the output shaft. The utility model discloses can optimize the location fit effect of axial between gear and the output shaft and circumference.
Description
Technical Field
The utility model relates to a gear assembly technical field especially relates to a gear and output shaft assembly structure and use its gear motor.
Background
The patent with the publication number of CN 210157025U discloses an output shaft mounting structure, including output shaft and installation and the epaxial gear of output, there is the constant head tank of moulding plastics on the gear, the inslot sets up the installation cover, the installation cover is equipped with the intercommunicating pore that supplies the output shaft to pass, still sets up the embedded groove that is connected with the intercommunicating pore, along the radial cross bore of having seted up of output shaft on the output shaft, be provided with the locating pin in the cross bore, locating pin and cross bore interference fit, the locating pin stretches out the cross bore, in the output shaft inserts the intercommunicating pore, in the tip embedded. Although the gear and output shaft mounting structure realizes the function of connecting and fixing the gear and the output shaft and has good detachability, the following technical problems exist:
first, the embedded groove in the output shaft that has the locating pin inserts the installation cover can guarantee to drive the locating pin through the embedded groove in the installation cover when the gear is rotatory to drive the output shaft rotatory, realized the circumference regulation of gear with the output shaft, but the output shaft is when receiving axial pulling force, directly deviate from in the gear installation cover easily.
Secondly, the gear is provided with an injection molding positioning sleeve, the gear must be processed firstly, and then the positioning sleeve is subjected to injection molding on the basis of the gear, so that the working procedures are increased, and the cost is improved.
Thirdly, the assembly of the shaft and the gear in the scheme needs the cooperation of the shaft sleeve, the cylindrical pin groove, the cylindrical pin and the limiting block, the whole structure is complex, and the use is inconvenient.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a first purpose provides a gear and output shaft assembly structure to the technical problem of the axial positioning effect of solution optimization output shaft and gear.
The second purpose of the utility model is to provide a gear motor to solve the technical problem who optimizes gear motor's output shaft and the axial positioning effect of gear.
The utility model discloses a gear and output shaft assembly structure is realized like this:
a gear and output shaft assembly structure comprising:
a gear having a central through hole; the gear is also provided with a connecting part communicated with the central through hole; the connecting part is provided with a central hole coaxially communicated with the central through hole, and a pin shaft groove communicated with the central hole is arranged in the connecting part along the radial direction of the gear;
an output shaft penetratingly inserted into the central through hole; an assembly hole penetrates through the output shaft along the radial direction of the output shaft, and a positioning pin shaft suitable for being embedded into the pin shaft groove penetrates through the assembly hole; and a knurling structure is further arranged on the part, matched with the central through hole, of the circumferential outer side wall of the output shaft.
In a preferred embodiment of the present invention, the knurl structure is in interference fit with the central through hole.
In a preferred embodiment of the present invention, the positioning pin is engaged with the mounting hole in a transition manner.
In a preferred embodiment of the present invention, the positioning pin and the pin groove are in clearance fit.
In the preferred embodiment of the present invention, a guiding angle is further disposed at the edge of the central hole at the end far away from the gear.
In a preferred embodiment of the present invention, an L-shaped step structure is formed between the axial end of the central through hole and the pin groove.
In an alternative embodiment of the present invention, the connecting portion protrudes from an axial end surface of the gear.
In an alternative embodiment of the present invention, the connecting portion and the gear are integrally formed by injection molding.
In an alternative embodiment of the present invention, the connecting portion is formed at an axial end of the gear in a recessed manner.
The utility model discloses a gear motor realizes like this:
a geared motor, comprising: the gear and the output shaft are assembled.
By adopting the technical scheme, the utility model discloses following beneficial effect has: the utility model discloses a gear and output shaft assembly structure and use its gear motor realize the location of axial between output shaft and the gear and circumference through locating pin axle and annular knurl structure to guaranteed that when the big moment of torsion of output shaft, the gear can not produce the condition emergence of the inefficacy of axial and circumference and lead to the unable work of whole product with being connected of output shaft.
Furthermore, the gear does not need to be additionally embedded and injection-molded to increase the cost, and only the pin shaft groove needs to be processed synchronously during processing, so that the processing cost and time are saved.
In addition, when the gear is in compression joint with the output shaft, the existing pin shaft groove can be directly used as the positioning hole, and the positioning pin shaft is directly pressed into the pin shaft groove, so that the positioning is more accurate, and the cost and time of assembly operation are not increased by additionally setting a positioning hole or a positioning block on the gear.
Drawings
FIG. 1 is a first perspective view of the gear and output shaft assembly of the present embodiment;
FIG. 2 is a second perspective view of the gear and output shaft assembly of the present embodiment;
FIG. 3 is a third perspective view of the gear and output shaft assembly of the present embodiment;
FIG. 4 is an exploded view of the gear and output shaft assembly of the present embodiment;
FIG. 5 is a schematic structural view of a gear of the gear and output shaft assembling structure of the present embodiment;
FIG. 6 is a schematic cross-sectional view of the assembled gear and output shaft structure of the present embodiment;
fig. 7 is a cross-sectional view of another alternative embodiment of the gear and output shaft assembling structure of the present embodiment.
In the figure: gear 1, central through hole 11;
the connecting part 2, a central hole 21, a pin shaft groove 22 and a guide angle 23;
the output shaft 3, the assembling hole 31, the positioning pin shaft 32 and the knurled structure 33;
an L-shaped step structure 4.
Detailed Description
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.
Example 1:
referring to fig. 1 to 6, the present embodiment provides an assembly structure of a gear 1 and an output shaft 3, including: adapted to fit the associated gear 1 and output shaft 3. Wherein the gear 1 has a central through hole 11; the gear 1 is also provided with a connecting part 2 communicated with the central through hole 11; the connecting part 2 is provided with a central hole 21 coaxially communicated with the central through hole 11, and a pin shaft groove 22 communicated with the central hole 21 is arranged in the connecting part 2 along the radial direction of the gear 1.
The output shaft 3 is inserted into the central through hole 11; a mounting hole 31 penetrates through the output shaft 3 along the radial direction of the output shaft, and a positioning pin shaft 32 suitable for being embedded into the pin shaft groove 22 penetrates through the mounting hole 31; it should be noted here that after the positioning pin 32 penetrates through the mounting hole 31, both ends of the positioning pin 32 extend to the outside of the output shaft 3, and the protruding dimensions of both ends of the positioning pin 32 relative to the output shaft 3 are the same. In an alternative embodiment, the positioning pin 32 is in transition fit with the assembling hole 31, so as to achieve a firm fit between the positioning pin 32 and the positioning hole. In addition, the positioning pin 32 and the pin slot 22 may be in a clearance fit relationship.
In addition, it should be noted that, the portion of the circumferential outer side wall of the output shaft 3 of the present embodiment, which is engaged with the central through hole 11, is further provided with a knurled structure 33. The knurled structure 33 is an interference fit with the central through hole 11 so as to facilitate a secure fit between the output shaft 3 and the central through hole 11.
In the specific assembling process of the output shaft 3 and the gear 1, the output shaft 3, on which the positioning pin shaft 32 is already assembled, is gradually pressed into the central through hole 11 of the gear 1 from one end of the knurled structure 33 to one end of the connecting portion 2 by taking the pin shaft groove 22 as a positioning reference, so that the knurled structure 33 is finally assembled into the central through hole 11, and the positioning pin shaft 32 is brought into the pin shaft groove 22 of the connecting portion 2 by the output shaft 3.
Furthermore, an L-shaped step structure 4 is formed between one axial end of the central through hole 11 and the pin groove 22. After the positioning pin 32 is fitted into the pin groove 22, the positioning pin is defined on the above-described L-shaped stepped structure 4.
For the central hole 21 of the present embodiment, the inner diameter of the central hole 21 may be slightly larger than the inner diameter of the central through hole 11, so that in the process of assembling the output shaft 3 with the gear 1, the knurled structure 33 of the output shaft 3 does not form an interference fit with the central hole 21, and can smoothly pass through the central hole 21 and then enter the central through hole 11, and finally, the interference fit between the knurled structure 33 and the central through hole 11 is achieved. In the embodiment, the fixing of the output shaft 3 and the gear 1 in the circumferential direction and the axial direction is realized by the positioning pin shaft 32 and the knurled structure 33.
In an alternative embodiment, the present embodiment is further provided with a guide angle 23 at the edge of the central hole 21 at the end remote from the gear 1. The guide angle 23 can improve the assembly efficiency of the output shaft 3 and the gear 1 in the assembly process.
In an alternative embodiment, the connecting portion 2 protrudes from an end surface of the gear 1 in the axial direction, in conjunction with the attached drawings of the present embodiment. Considering the convenience of processing here, connecting portion 2 and gear 1 integrative injection moulding, under this kind of structure, gear 1 need not do extra inserts and mould plastics and increase the cost, only need process the synchronous direct round pin axle groove 22 of having processed in connecting portion 2, so can simplify processing operation to save the time of processing and assembly.
Example 2:
referring to fig. 7, on the basis of the assembly structure of the gear 1 and the output shaft 3 of the embodiment 1, the assembly structure of the gear 1 and the output shaft 3 provided by the embodiment is substantially the same as that of the embodiment 1, except that the connecting portion 2 of the embodiment is concavely formed at one end of the gear 1 in the axial direction. That is, the coupling portion 2 is formed by integrally molding a portion of the central through hole 11 of the gear 1 during the process of forming the gear 1.
The specific structure of the connecting portion 2 in this embodiment may be the same as the structure of the connecting portion 2 in embodiment 1, and details of this embodiment are not repeated.
Example 3:
on the basis of the assembly structure of the gear 1 and the output shaft 3 of embodiment 1 or embodiment 2, the present embodiment provides a reduction motor including: the gear 1 and the output shaft 3 of embodiment 1 or embodiment 2 are assembled.
The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above embodiments are only examples of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Claims (10)
1. A gear and output shaft assembling structure, comprising:
a gear having a central through hole; the gear is also provided with a connecting part communicated with the central through hole; the connecting part is provided with a central hole coaxially communicated with the central through hole, and a pin shaft groove communicated with the central hole is arranged in the connecting part along the radial direction of the gear;
an output shaft penetratingly inserted into the central through hole; an assembly hole penetrates through the output shaft along the radial direction of the output shaft, and a positioning pin shaft suitable for being embedded into the pin shaft groove penetrates through the assembly hole; and a knurling structure is further arranged on the part, matched with the central through hole, of the circumferential outer side wall of the output shaft.
2. The gear and output shaft assembly of claim 1 wherein the knurled structure has an interference fit with the central through hole.
3. The gear and output shaft assembly structure of claim 1, wherein the locating pin is interfitted with the assembly hole.
4. A gear and output shaft assembly according to any one of claims 1 or 3, wherein the locating pin is a clearance fit with the pin slot.
5. The gear and output shaft assembly of claim 1 wherein the central bore further includes a guide angle at an edge of the bore distal from the end of the gear.
6. The gear and output shaft assembly structure of claim 1, wherein an L-shaped step structure is formed between one axial end of the central through hole and the pin groove.
7. The gear and output shaft assembling structure according to claim 1, wherein said connecting portion protrudes from an end surface in the axial direction of the gear.
8. The gear and output shaft assembling structure according to any one of claims 1 or 7, wherein the connecting portion is injection molded integrally with the gear.
9. The gear and output shaft assembling structure according to claim 1, wherein the connecting portion is concavely formed at one end in the gear axial direction.
10. A reduction motor, comprising: the gear and output shaft assembly structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021363725.4U CN212775448U (en) | 2020-07-13 | 2020-07-13 | Gear and output shaft assembly structure and speed reduction motor using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021363725.4U CN212775448U (en) | 2020-07-13 | 2020-07-13 | Gear and output shaft assembly structure and speed reduction motor using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212775448U true CN212775448U (en) | 2021-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021363725.4U Active CN212775448U (en) | 2020-07-13 | 2020-07-13 | Gear and output shaft assembly structure and speed reduction motor using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212775448U (en) |
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2020
- 2020-07-13 CN CN202021363725.4U patent/CN212775448U/en active Active
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