CN214228981U - Power component and garden tool - Google Patents
Power component and garden tool Download PDFInfo
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- CN214228981U CN214228981U CN202120034920.0U CN202120034920U CN214228981U CN 214228981 U CN214228981 U CN 214228981U CN 202120034920 U CN202120034920 U CN 202120034920U CN 214228981 U CN214228981 U CN 214228981U
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Abstract
The utility model provides a power component and garden instrument, power component includes: a housing; a motor for driving the power assembly; the working assembly comprises an output shaft and a working assembly, wherein the output shaft is used for outputting the power of the motor; the transmission assembly comprises a first transmission disc in transmission connection with the motor and a second transmission disc connected with the output shaft, a positioning part is formed at the bottom of the first transmission disc, a matching part is correspondingly formed at the top of the second transmission disc, and the positioning part and the matching part are both arranged in a concave-convex manner so that the positioning part and the matching part can be meshed with each other; when the motor works normally, the positioning part is meshed with the matching part, so that the first transmission disc and the second transmission disc are driven to synchronously rotate when the motor rotates, and the power of the motor is transmitted to the output shaft; when receiving external resistance, output shaft and second driving disk stall, location portion breaks away from each other with the cooperation portion.
Description
Technical Field
The utility model relates to a power component and applied this power component's garden instrument.
Background
The grass mower is common grass cutting equipment, is high in efficiency, simple and convenient to operate, and suitable for trimming lawns such as sanitation grasslands and greenery lands. When the blade collides with a hard object such as a stone or an iron pipe, the strong collision resilience force often damages the structure of the output shaft of the blade, so that the machine cannot be used continuously.
In view of the above, there is a need for an improved power assembly to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a power component and garden instrument for the protection output shaft structure just is convenient for maintain.
In order to achieve the above object, the utility model provides a power assembly, include: a housing; a motor for driving the power assembly; the working assembly comprises an output shaft and is used for outputting the power of the motor; the transmission assembly comprises a first transmission disc in transmission connection with the motor and a second transmission disc connected with the output shaft, a positioning part is formed at the bottom of the first transmission disc, a matching part is correspondingly formed at the top of the second transmission disc, and the positioning part and the matching part are both arranged in a concave-convex manner, so that the positioning part and the matching part can be meshed with each other; when the motor works normally, the positioning part is meshed with the matching part, so that the first transmission disc and the second transmission disc are driven to rotate synchronously when the motor rotates, and the power of the motor is transmitted to the output shaft; when external resistance is received, the output shaft and the second transmission disc stop rotating, and the positioning part and the matching part are mutually separated.
As a further improvement of the present invention, the bottom of the second transmission disc is connected with an elastic member, and during normal operation, the positioning portion of the first transmission disc and the matching portion of the second transmission disc are engaged with each other under the tension of the elastic member; when external resistance is received, an oblique tangential force is generated between the positioning part and the matching part, the second transmission disc is pushed to be away from the first transmission disc until the matching part is separated from the positioning part, and the elastic piece is compressed.
As a further improvement, the second drive plate has been seted up the confession the perforation that the output shaft passed, the one end of output shaft is equipped with the external splines, be equipped with the internal splines on the fenestrate inside wall, the output shaft passes during the second drive plate, the external splines accept in the internal splines, just the second drive plate can for the output shaft reciprocates along the axis direction of output shaft.
As a further improvement of the utility model, location portion with slant tangential force who produces between the cooperation portion decomposes into partial decurrent axial force, when this axial force is greater than the tensile force of elastic component, the second driving disk is promoted and is followed the axis direction downstream of output shaft until the cooperation portion breaks away from location portion, first driving disk idle running.
As a further improvement, the power assembly further comprises a bearing seat, the second transmission disc and the elastic piece are all accommodated in the bearing seat, the bottom of the second transmission disc is provided with a limit groove, one end of the elastic piece is limited in the limit groove, the other end and the bearing seat is in butt joint.
As a further improvement of the utility model, the transmission assembly still includes drive gear, first drive disk with drive gear passes through bolt locking and fixes, the central point of first drive disk puts the department and installs the bearing, the bearing quilt first drive disk with the drive gear centre gripping.
As a further improvement, the top of the output shaft is provided with a screw hole, the bolt extends from top to bottom into the screw hole, so as to fix the output shaft with the bearing is locked and fixed.
As a further improvement of the utility model, drive gear include with the motor shaft of motor link to each other the driving gear and with driving gear engaged with driven gear, first drive disk with driven gear fixed connection and synchronous rotation.
As a further improvement, the working assembly and the transmission assembly are both provided with two sets and driven by the same motor.
In order to achieve the above object, the utility model also provides a garden tool, including main part, running gear and as above power component.
The utility model has the advantages that: the utility model discloses can make the blade when colliding hard object, avoid damaging the output shaft structure because of the bounce of fierce collision, play the guard action.
Drawings
Fig. 1 is a perspective view of the garden tool of the present invention as a grass mower.
FIG. 2 is a schematic cross-sectional view of the mower shown in FIG. 1 at the blade assembly.
FIG. 3 is a perspective view of the cutter assembly of FIG. 2.
Fig. 4 is a partial cross-sectional view of the cutter assembly of fig. 3.
Fig. 5 is a partially exploded view of the cutter assembly of fig. 3.
Fig. 6 is a cross-sectional view of the transmission assembly and output shaft of fig. 5 after assembly.
Fig. 7 is an exploded view of the transmission assembly and output shaft of fig. 5.
Fig. 8 is an exploded view of the driven gear and the first drive disk of fig. 7.
Fig. 9 is an exploded view of the second drive disk, the resilient member, and the output shaft of fig. 7.
FIG. 10 is a diagram of the engagement of the transmission assembly with the output shaft under normal operating conditions.
FIG. 11 is a diagram of the engagement of the transmission assembly with the output shaft when external resistance is applied.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
In order to avoid obscuring the present invention with unnecessary details, it should be noted that only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not relevant to the present invention are omitted.
In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The utility model discloses a garden instrument has power component, garden instrument can be the lawn mower 100, power component can be cutting knife subassembly 200. Of course, the power assembly may also be applied to other garden tools, which are not described in detail herein, nor are they intended to be limiting. For clarity of description, the following description will take the cutter assembly 200 as an example, and will describe the specific structure of the cutter assembly 200 in detail.
As shown in fig. 1 and 2, the present invention discloses a grass mower 100, which comprises a main body 101, a walking assembly 102 and a cutting knife assembly 200. The walking assembly 102 comprises walking wheels which are respectively arranged on the front side and the rear side of the main body 101, and the cutting knife assembly 200 is arranged below the main body 101.
As shown in fig. 3 to 5, in a preferred embodiment of the present invention, the cutting knife assembly 200 includes a housing 10, a motor 20, a working assembly 30, and a transmission assembly 40, wherein the housing 10 is used for accommodating the working assembly 30 and the transmission assembly 40, and specifically, the housing 10 includes a vertical portion 11 for accommodating the working assembly 30 and a horizontal portion 12 for accommodating the transmission assembly 40.
The motor 20 is disposed outside the housing 10 for driving the cutter assembly 200. In the present embodiment, the motor 20 is disposed above the housing 10, and the motor shaft 21 of the motor 20 is vertically disposed and extends into the housing 10, and is connected to the transmission assembly 40.
The working assembly 30 includes an output shaft 31 for transmitting power and a blade 32 disposed at one end of the output shaft 31, the output shaft 31 is disposed in the vertical portion 11 along a vertical direction, the blade 32 is disposed outside the housing 10 and at one end of the housing 10 far away from the motor 20, that is, the blade 32 is horizontally disposed below the vertical portion 11. The lower end of the vertical part 11 is provided with a blade seat 13, a gasket 14 and a nut 15 which are fixedly connected, and the output shaft 31 passes through the blade seat 13, the gasket 14 and the nut 15 and is fixedly connected with the blade 32.
As shown in fig. 6 to 9, the transmission assembly 40 includes a transmission gear 41, a first transmission disk 42 and a second transmission disk 43, and the transmission gear 41, the first transmission disk 42 and the second transmission disk 43 are sequentially sleeved on the output shaft 31. The transmission gear 41 is in transmission connection with the motor 20, and the first transmission disk 42 is fixedly connected with the transmission gear 41 and synchronously rotates; specifically, the first drive disk 42 and the drive gear 41 are locked and fixed by a bolt 51', a first bearing 44 is installed at the center of the first drive disk 42, the first bearing 44 is clamped by the first drive disk 42 and the drive gear 41, and the output shaft 31 passes through the first bearing 44 and is locked and fixed with the first bearing 44 by a bolt 51 and a washer 52. Preferably, a screw hole (not shown) is formed at the top end of the output shaft 31, and the bolt 51 passes through the spacer 52 from top to bottom and extends into the screw hole to lock and fix the output shaft 31 and the first bearing 44.
The transmission gear 41 comprises a driving gear connected with the motor shaft 21 of the motor 20 and a driven gear engaged with the driving gear, in this embodiment, the first transmission disk 42 and the driven gear are fixedly connected and synchronously rotate to realize power transmission; of course, in other embodiments, the first transmission disk 42 can be directly connected to the driving gear, and the driving gear can be used to drive the first transmission disk 42 to rotate synchronously. For convenience of description, the following description will directly replace the driven gear with the driving gear 41.
The second transmission disc 43 is fixedly connected to the output shaft 31. Specifically, the second transmission disc 43 has a through hole 431 through which the output shaft 31 passes, the output shaft 31 has an external spline 311 at one end thereof, the through hole 431 has an internal spline 432 on an inner wall thereof, and the external spline 311 is received in the internal spline 432 when the output shaft 31 passes through the second transmission disc 43, so that the second transmission disc 43 can be fixedly connected to the output shaft 31 by the mutual engagement between the external spline 311 and the internal spline 432, and the second transmission disc 43 can be moved up and down in the axial direction of the output shaft 31 with respect to the output shaft 31.
The bottom of first drive disc 42 is formed with location portion 421, the top correspondence of second drive disc 43 is formed with cooperation portion 433, location portion 421 and cooperation portion 433 all are the setting of unsmooth form (similar to the cockscomb structure), so that location portion 421 with cooperation portion 433 can intermeshing. During normal work, location portion 421 with cooperation portion 433 intermeshing to when motor 20 rotates, usable motor shaft 21 drives drive gear 41 and first drive disk 42 and rotates, then drives second drive disk 43 and output shaft 31 synchronous revolution, the realization with motor 20's power transmission extremely blade 32. When the blade 32 stops rotating when external resistance is applied, the output shaft 31 and the second transmission disc 43 stop rotating, and then the positioning portion 421 and the engaging portion 433 disengage from each other.
Specifically, the elastic member 45 is connected to the bottom of the second transmission disc 43, and the positioning portion 421 of the first transmission disc 42 and the matching portion 433 of the second transmission disc 43 are engaged with each other under the tension of the elastic member 45 during normal operation. When external resistance is applied, an oblique tangential force is generated between the positioning portion 421 and the engaging portion 433, the oblique tangential force is decomposed into a partial downward axial force, and when the axial force is greater than the tension of the elastic member 45, the second transmission disc 43 is pushed to move downward along the axial direction of the output shaft 31 (i.e. away from the first transmission disc 42) until the engaging portion 433 is separated from the positioning portion 421, at this time, the elastic member 45 is compressed, and the first transmission disc 42 idles under the driving of the motor 20.
The transmission assembly 40 further includes a bearing seat 46 sleeved on the output shaft 31, the second transmission disc 43 and the elastic member 45 are accommodated in the bearing seat 46, a limiting groove 434 is arranged at the bottom of the second transmission disc 43, one end of the elastic member 45 is limited in the limiting groove 434, and the other end of the elastic member is abutted to the bearing seat 46. A second bearing 47 is also housed at the bottom of the bearing seat 46, and the output shaft 31 passes through the second bearing 47 when being mounted, in order to: facilitating rotation of the output shaft 31.
The working assembly 30 and the transmission assembly 40 are provided with two groups and are driven by the same motor 20.
As shown in fig. 10, during normal operation, the motor 20 drives the transmission gear 41 to rotate, under the action of the tension of the elastic member 45, the positioning portion 421 of the first transmission disc 42 and the matching portion 433 of the second transmission disc 43 are engaged with each other (i.e., they are pressed in a staggered manner) under the action of the tension of the elastic member 45, so as to drive the first transmission disc 42 and the second transmission disc 43 to rotate together, and since the second transmission disc 43 is connected with the output shaft 31 through the external spline 311 and the internal spline 432, the output shaft 31 and the motor 20 rotate together, and further drive the blade 32 at one end of the output shaft 31 to rotate for cutting operation.
As shown in fig. 11, when the blade 32 collides with a hard object and stops rotating, the output shaft 31 stops rotating immediately because the blade 32 and the output shaft 31 are rigidly connected, and the transmission gear 41 continues to rotate under the driving of the motor 20. Because the positioning portion 421 of the first transmission disc 42 is engaged with the engaging portion 433 of the second transmission disc 43, under the action of the torque force of the transmission gear 41, the positioning portion 421 of the first transmission disc 42 and the engaging portion 433 of the second transmission disc 43 generate a tangential force along the inclined plane, the tangential force is decomposed into a partial downward axial force, when the axial force is greater than the tension force of the elastic member 45, the second transmission disc 43 is pushed away in the direction of the male spline 311 (i.e., downward) and is disengaged from the positioning portion 421 of the first transmission disc 42, i.e., the second transmission disc 43 slides over the first transmission disc 42 in a fitting manner, and at this time, the transmission gear 41 idles. Thus, when the blade 32 collides with a hard object, the strong collision resilience and the torque of the motor 20 are disengaged from each other, thereby functioning as a safety clutch, not damaging the whole transmission system, and effectively protecting the transmission system of the blade 32. Of course, when the load returns to normal, the first and second drive plates 42, 43 can again transmit torque.
To sum up, the utility model discloses can make blade 32 when bumping hard object, avoid damaging the output shaft 31 structure because of the bounce of violent collision, play the guard action. Compared with the prior art, the utility model has the advantages of it is following: reliable jointing, thorough separation, rapid action, flexible operation, stability and no impact; the structure is simple, the manufacture is easy, the cost is low, the work is safe, the transmission efficiency is high, and the service life is long; light weight, small inertia, small overall dimension, strong heat dissipation capability, convenient adjustment and maintenance, and the like.
The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A power assembly, comprising:
a housing;
a motor for driving the power assembly;
the working assembly comprises an output shaft and is used for outputting the power of the motor;
the transmission assembly comprises a first transmission disc in transmission connection with the motor and a second transmission disc connected with the output shaft, a positioning part is formed at the bottom of the first transmission disc, a matching part is correspondingly formed at the top of the second transmission disc, and the positioning part and the matching part are both arranged in a concave-convex manner, so that the positioning part and the matching part can be meshed with each other;
when the motor works normally, the positioning part is meshed with the matching part, so that the first transmission disc and the second transmission disc are driven to rotate synchronously when the motor rotates, and the power of the motor is transmitted to the output shaft; when external resistance is received, the output shaft and the second transmission disc stop rotating, and the positioning part and the matching part are mutually separated.
2. The power assembly of claim 1, wherein: the bottom of the second transmission disc is connected with an elastic piece, and when the transmission device works normally, the positioning part of the first transmission disc and the matching part of the second transmission disc are meshed with each other under the tension of the elastic piece; when external resistance is received, an oblique tangential force is generated between the positioning part and the matching part, the second transmission disc is pushed to be away from the first transmission disc until the matching part is separated from the positioning part, and the elastic piece is compressed.
3. The power assembly of claim 2, wherein: the second transmission disc is provided with a through hole for the output shaft to penetrate through, one end of the output shaft is provided with an external spline, the inner side wall of the through hole is provided with an internal spline, when the output shaft penetrates through the second transmission disc, the external spline is contained in the internal spline, and the second transmission disc can move up and down relative to the output shaft along the axis direction of the output shaft.
4. A power assembly according to claim 3, wherein: when the axial force is larger than the tension force of the elastic piece, the second transmission disc is pushed to move downwards along the axial direction of the output shaft until the matching part is separated from the positioning part, and the first transmission disc idles.
5. The power assembly of claim 2, wherein: the power assembly further comprises a bearing seat, the second transmission disc and the elastic piece are contained in the bearing seat, a limiting groove is formed in the bottom of the second transmission disc, one end of the elastic piece is limited in the limiting groove, and the other end of the elastic piece is abutted to the bearing seat.
6. The power assembly of claim 1, wherein: the transmission assembly further comprises a transmission gear, the first transmission disk and the transmission gear are fixedly locked through bolts, a bearing is installed at the center of the first transmission disk, and the bearing is clamped by the first transmission disk and the transmission gear.
7. The power assembly of claim 6, wherein: the top end of the output shaft is provided with a screw hole, and the bolt extends into the screw hole from top to bottom so as to lock and fix the output shaft and the bearing.
8. The power assembly of claim 6, wherein: the transmission gear comprises a driving gear connected with a motor shaft of the motor and a driven gear meshed with the driving gear, and the first transmission disk is fixedly connected with the driven gear and synchronously rotates.
9. The power assembly of claim 1, wherein: the working assembly and the transmission assembly are both provided with two groups and driven by the same motor.
10. A garden tool, its characterized in that: comprising a body, a walking assembly and a power assembly according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120034920.0U CN214228981U (en) | 2021-01-07 | 2021-01-07 | Power component and garden tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120034920.0U CN214228981U (en) | 2021-01-07 | 2021-01-07 | Power component and garden tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214228981U true CN214228981U (en) | 2021-09-21 |
Family
ID=77724601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120034920.0U Active CN214228981U (en) | 2021-01-07 | 2021-01-07 | Power component and garden tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214228981U (en) |
-
2021
- 2021-01-07 CN CN202120034920.0U patent/CN214228981U/en active Active
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