CN218000198U - Power transmission mechanism of electric tool - Google Patents
Power transmission mechanism of electric tool Download PDFInfo
- Publication number
- CN218000198U CN218000198U CN202221451713.6U CN202221451713U CN218000198U CN 218000198 U CN218000198 U CN 218000198U CN 202221451713 U CN202221451713 U CN 202221451713U CN 218000198 U CN218000198 U CN 218000198U
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- shaft
- key
- spline
- hole
- transmission shaft
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Abstract
The utility model relates to an electric tool's power transmission mechanism, including motor, connecting axle and spline, its characterized in that: the connecting shaft is characterized by further comprising a key shaft, one end of the key shaft is in interference connection with a key shaft hole in the connecting shaft, and the other end of the key shaft is in interference connection with a spline hole in the spline. The utility model discloses a set up first transmission shaft and second transmission shaft and carry out power transmission between spline and motor output shaft, can effectively reduce the length of key shaft, improve power transmission's stability.
Description
Technical Field
The utility model relates to an electric tool's power transmission technical field, concretely relates to electric tool's power transmission mechanism.
Background
The electric tool is a tool commonly used in daily life, such as an electric wrench, an electric drill and the like, and also can be replaced by a functional head disclosed in application No. 2021227362069. The output shaft (being equivalent to the key shaft part of this application) periphery wall of above structure goes up the tooth that has (being equivalent to the spline part of this application), and this tooth and output shaft be the integrated into one piece structure, when the not unidimensional function head of adaptation, need wholly change output shaft (being equivalent to the spline and the key shaft of this application), and use cost is high.
SUMMERY OF THE UTILITY MODEL
To the deficiency in the background art, the utility model provides an electric tool's power transmission mechanism.
The utility model adopts the technical proposal that: the power transmission mechanism of the electric tool comprises a motor, a connecting shaft and a spline, and further comprises a key shaft, wherein one end of the key shaft is in interference connection with a key shaft hole in the connecting shaft, and the other end of the key shaft is in interference connection with a spline hole in the spline.
Furthermore, the connecting shaft comprises a first transmission shaft and a second transmission shaft, one end of the first transmission shaft is fixedly connected with an output shaft of the motor, the other end of the first transmission shaft is connected with the second transmission shaft through a toothed key, and a key shaft of the spline is connected with the second transmission shaft.
Furthermore, one end of the first transmission shaft is provided with a connecting hole used for being connected with an output shaft of the motor, the outer ring of the other end of the first transmission shaft is provided with a plurality of key teeth, and the side face of the connecting hole is provided with an air release hole.
Furthermore, one end of the second transmission shaft is provided with a sleeve hole sleeved with the first transmission shaft, the other end of the second transmission shaft is provided with the key shaft hole, and a key groove matched with the key teeth is arranged in the sleeve hole.
Further, a heat dissipation wind wheel is fixed on a key shaft of the spline.
Further, still include the tool case, be equipped with in the tool case and use the bearing bracket, install the bearing on the output shaft of motor, the bearing is with the dead eye adaptation of bearing bracket.
The beneficial effects of the utility model are that: the utility model discloses a spline passes through the key shaft and is connected with the connecting axle, and removable being connected between key shaft and spline and the connecting axle to can change not unidimensional spline alone and come the functional head of the different specifications of adaptation, easy dismounting reduces use cost.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the second transmission shaft.
Fig. 3 is a schematic structural view of the first transmission shaft.
Fig. 4 is a schematic structural view of the power transmission mechanism and the tool housing.
Fig. 5 is a schematic view of a spline and a connecting shaft.
In FIGS. 1-5: 1. a motor; 2. a spline; 3. a first drive shaft; 4. a second drive shaft; 5. an output shaft; 6. a key shaft; 7. connecting holes; 8. a key tooth; 9. air bleeding holes; 10. trepanning; 11. a key shaft hole; 12. a keyway; 13. a heat-dissipating wind wheel; 14. a tool housing; 15. a bearing support; 16. a bearing; 17. A bearing bore; 18. a connecting shaft; 19. a splined bore.
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 of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, back, 8230; \8230;) are provided in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
The utility model provides an electric tool's power transmission mechanism.
In this embodiment, referring to fig. 1 to 5, the power transmission mechanism of the electric power tool includes a motor, a connecting shaft, and a spline, and is characterized in that: the connecting shaft is characterized by further comprising a key shaft, one end of the key shaft is in interference connection with a key shaft hole in the connecting shaft, and the other end of the key shaft is in interference connection with a spline hole in the spline.
Among the above-mentioned technical scheme, the spline is connected with the connecting axle through the key shaft, and removable the being connected between key shaft and spline and the connecting axle to can change the not functional head of equidimension spline adaptation different specifications alone, easy dismounting reduces use cost.
The connecting shaft comprises a first transmission shaft 3 and a second transmission shaft 4, one end of the first transmission shaft is fixedly connected with an output shaft 5 of the motor, the other end of the first transmission shaft is connected with the second transmission shaft through a toothed key, and a key shaft 6 of the spline is connected with the second transmission shaft.
Among the above-mentioned technical scheme, carry out power transmission through setting up first transmission shaft and secondary drive axle between spline and motor output shaft, can effectively reduce the length of key shaft, improve power transmission's stability.
Wherein, first transmission shaft and secondary drive axle pass through the tooth keyed connection, easy dismounting, and the later maintenance of being convenient for is changed first transmission shaft and secondary drive axle after the damage.
In addition, in practical application, different second transmission shafts can be adapted according to the size of the key shaft of the spline, and the use is more flexible.
Specifically, one end of the first transmission shaft is provided with a connecting hole 7 used for being connected with an output shaft of a motor, the outer ring of the other end of the first transmission shaft is provided with a plurality of key teeth 8, and the side surface of the connecting hole is provided with an air vent 9; one end of the second transmission shaft is provided with a sleeve hole 10 which is sleeved with the first transmission shaft, the other end of the second transmission shaft is provided with the key shaft hole 11, and a key groove 12 matched with the key teeth is arranged in the sleeve hole.
When the motor is assembled, the output shaft of the motor extends into the connecting hole to be connected, wherein the air discharging hole is used for exhausting air, so that the output shaft can be connected into the connecting hole. And first transmission shaft and secondary drive axle carry out the suit through the trepanning, and the dismouting is changed conveniently, and the later stage of being convenient for is changed and is maintained.
Specifically, a heat dissipation wind wheel 13 is fixed on a key shaft of the spline.
Among the above-mentioned technical scheme, the heat dissipation wind wheel is used for dispelling the heat to transmission device, improves the life of mechanism.
Specifically, the tool comprises a tool housing 14, a bearing support 15 is arranged in the tool housing, a bearing 16 is arranged on an output shaft of the motor, and the bearing is matched with a bearing hole 17 of the bearing support.
Among the above-mentioned technical scheme, through addding bearing and bearing retainer, improve power transmission's stability, avoid the first transmission shaft of output shaft of motor and secondary drive axle to take place the shake.
The skilled person should understand that: although the present invention has been described according to the above embodiments, the inventive idea is not limited to this embodiment, and any application of the inventive idea is also included in the scope of the patent right protection.
Claims (5)
1. Electric tool's power transmission mechanism, including motor, connecting axle and spline, its characterized in that: the wind wheel heat dissipation device is characterized by further comprising a key shaft, one end of the key shaft is in interference connection with a key shaft hole in the connecting shaft, the other end of the key shaft is in interference connection with a spline hole in the spline, and a heat dissipation wind wheel is fixed on the key shaft of the spline.
2. The power transmission mechanism of the electric power tool according to claim 1, characterized in that: the connecting shaft comprises a first transmission shaft and a second transmission shaft, one end of the first transmission shaft is fixedly connected with an output shaft of the motor, the other end of the first transmission shaft is connected with the second transmission shaft through a toothed key, and a key shaft of the spline is connected with the second transmission shaft.
3. The power transmission mechanism of a power tool according to claim 2, characterized in that: one end of the first transmission shaft is provided with a connecting hole used for being connected with an output shaft of the motor, the outer ring of the other end of the first transmission shaft is provided with a plurality of key teeth, and the side face of the connecting hole is provided with an air release hole.
4. The power transmission mechanism of a power tool according to claim 3, characterized in that: one end of the second transmission shaft is provided with a sleeve hole sleeved with the first transmission shaft, the other end of the second transmission shaft is provided with the key shaft hole, and a key groove matched with the key teeth is arranged in the sleeve hole.
5. The power transmission mechanism of a power tool according to claim 1, characterized in that: the tool is characterized by further comprising a tool shell, wherein a bearing support is arranged in the tool shell, a bearing is installed on an output shaft of the motor, and the bearing is matched with a bearing hole of the bearing support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221451713.6U CN218000198U (en) | 2022-06-10 | 2022-06-10 | Power transmission mechanism of electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221451713.6U CN218000198U (en) | 2022-06-10 | 2022-06-10 | Power transmission mechanism of electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218000198U true CN218000198U (en) | 2022-12-09 |
Family
ID=84300083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221451713.6U Active CN218000198U (en) | 2022-06-10 | 2022-06-10 | Power transmission mechanism of electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218000198U (en) |
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2022
- 2022-06-10 CN CN202221451713.6U patent/CN218000198U/en active Active
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