CN213646139U - Chain saw - Google Patents
Chain saw Download PDFInfo
- Publication number
- CN213646139U CN213646139U CN202022394488.4U CN202022394488U CN213646139U CN 213646139 U CN213646139 U CN 213646139U CN 202022394488 U CN202022394488 U CN 202022394488U CN 213646139 U CN213646139 U CN 213646139U
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- CN
- China
- Prior art keywords
- chainsaw
- drive wheel
- drive shaft
- motor
- chain saw
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B17/00—Chain saws; Equipment therefor
- B27B17/08—Drives or gearings; Devices for swivelling or tilting the chain saw
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Sawing (AREA)
Abstract
The utility model relates to a chain saw, this chain saw has: the chain saw comprises a drive wheel for driving the saw chain, a drive shaft coupled to the drive wheel, a motor for driving the drive shaft, and a fastening element for fastening the drive wheel to the drive shaft, wherein the chain saw further comprises at least one disk spring arranged between the drive wheel and the fastening element. Here, the clearance between the drive wheel for the saw chain and the motor shaft of the chainsaw is minimized to prevent premature wear of the motor shaft.
Description
Technical Field
The utility model relates to a chain saw. In particular, the invention relates to a chain saw driven by an electric motor, wherein the electric motor is supplied with power, for example, by a battery.
Background
In a chainsaw, the saw chain is driven by a drive wheel, which in turn is driven by a motor, such as an electric motor.
Fig. 4 shows a schematic perspective exploded view of the drive wheel 12 and other elements for a chain saw according to a first example of the prior art. In addition to the drive wheel 12, the chain saw is equipped with a spacer plate 16, a screw connection 18 and a fastening element 22. In the mounted state, the drive shaft passes through the screw connection 18, the spacer disk 16 and the drive wheel 12. The fixing element 22 can be fixed near the open end of the drive shaft. In this example, a locking piece is provided as the fixing member 22.
Fig. 5 shows a schematic perspective exploded view of the drive wheel 12 and other elements for a chain saw according to a second example of the prior art. A locking ring is used as the fixing element 22. Fig. 6 shows the drive wheel 12, the drive shaft 14 and the side disk 26 according to a second example of the prior art in the mounted state, wherein the drive wheel 12 and the side disk 26 are fastened to the drive shaft 14 by means of a locking ring.
The driving wheel 12 and its fixed structure according to the prior art are suitable for a maximum power of about 1500W and cause premature wear of the motor shaft. In case of loss of the motor shaft, the entire motor needs to be replaced, which results in high costs. Too large a gap between the drive wheel for the saw chain and the motor shaft also leads to rapid wear of the motor shaft.
SUMMERY OF THE UTILITY MODEL
A general object of the present invention is to provide a chain saw in which the clearance between the drive wheel for the saw chain and the motor shaft is minimized to prevent premature wear of the motor shaft.
This purpose is achieved by the chain saw of the present invention.
A chain saw is proposed, comprising: the chain saw comprises a drive wheel for driving the saw chain, a drive shaft coupled to the drive wheel, a motor for driving the drive shaft, and a fastening element for fastening the drive wheel to the drive shaft, wherein the chain saw further comprises at least one disk spring arranged between the drive wheel and the fastening element. Furthermore, it is proposed that: the fixing element is fixed at the open end of the drive shaft. Furthermore, it is proposed that: the fixing element is designed as a screw. Furthermore, it is proposed that: the screw extends coaxially with the drive shaft in the fixed state. Furthermore, it is proposed that: at least one washer is arranged between the disk spring and the fastening element. Furthermore, it is proposed that: the chain saw has a saw chain detachably mounted at the chain saw. Furthermore, it is proposed that: the chain saw has a guide rail for the saw chain, which guide rail is detachably fastened to the chain saw. Furthermore, it is proposed that: the chainsaw is provided for a power of more than 1500W. Furthermore, it is proposed that: the chainsaw is set for rotational speeds greater than 12000 RPM. Furthermore, it is proposed that: the motor is an electric motor arranged to be powered by the electricity grid and/or by a battery. Furthermore, it is proposed that: the motor is an internal combustion engine.
According to the utility model provides a chain saw, it has following part:
a drive wheel for driving the saw chain,
a drive shaft coupled or couplable with the drive wheel,
a motor for driving the drive shaft, wherein,
a fixing element for fixing the drive wheel to the drive shaft, and
at least one disk spring arranged between the drive wheel and the stationary element.
The chain saw according to the invention with a structure for the specific fastening of the drive wheel by means of the disk spring and the fastening element enables a greater motor output, a greater torque and a greater rotational speed. Furthermore, the service life of the motor shaft is extended. The clearance between the drive wheel and the motor shaft is reduced by the belleville spring.
The fixing element is preferably fixed or fixable at the open end of the drive shaft.
For example, screws are provided as fixing elements.
The screw extends in particular in the fixed state coaxially to the drive shaft. For this purpose, the screw preferably has an external thread and the drive shaft has a corresponding internal thread.
At least one washer can optionally be arranged between the disk spring and the fastening element.
The chain saw also has a saw chain, which is preferably detachably mounted or mountable on the chain saw.
The chain saw also has a guide rail for the saw chain, which guide rail is detachably fastened or can be fastened to the chain saw.
The chainsaw is especially provided for powers of more than 1500W.
The chainsaw is preferably arranged for a rotational speed of more than 12000 RPM.
The motor is for example an electric motor arranged to be powered by the electricity network and/or by a battery.
Alternatively, the internal combustion engine can be provided as a motor.
Drawings
The invention is described in more detail below on the basis of preferred embodiments and with reference to the accompanying drawings.
Figure 1 shows a schematic perspective exploded view of a drive wheel and other elements for a chain saw according to a preferred embodiment of the invention,
figure 2 shows a schematic perspective exploded view of the drive wheel together with other elements for the chain saw and the drive shaft according to a preferred embodiment of the invention,
figure 3 shows a schematic perspective view of a chainsaw according to a preferred embodiment of the present invention,
figure 4 shows a schematic perspective exploded view of a drive wheel and other elements for a chain saw according to a first example of the prior art,
fig. 5 shows a schematic perspective exploded view of a drive wheel and other elements for a chain saw, according to a second example of the prior art, an
Fig. 6 shows a schematic side view of a drive wheel and other elements for a chain saw according to a second example of the prior art.
Detailed Description
Fig. 1 shows a schematic perspective exploded view of the drive wheel 12 and other elements for the chain saw 10, according to a preferred embodiment of the present invention.
In addition to the drive wheel 12, the chainsaw 10 according to a preferred embodiment of the present invention is equipped with a spacer 16, a screw connection 18, a belleville spring 20, a fixing element 22 and a washer 24. In the installed state, the drive shaft 14 passes through the screw connection 18, the spacer disk 16, the drive wheel 12 and the disk spring 20. The fixing element 22 can be fixed at the open end of the drive shaft 14. Preferably, at least one washer 24 is located between the belleville spring 20 and the retaining element 22. In this example, a screw is provided as the fixing member 22.
Fig. 2 shows a schematic perspective exploded view of the drive wheel 12 and other elements for the chain saw 10 and the drive shaft 14, according to a preferred embodiment of the present invention.
In the installed state, the drive shaft 14 passes through the screw connection 18, the intermediate disk 16, the drive wheel 12 and the disk spring 20, while the fastening element 22 can be fastened at the open end of the drive shaft 14. In a preferred embodiment, the drive shaft 14 and the motor shaft are constructed as a single component. Alternatively, the drive shaft 14 and the motor shaft can also be constructed as separate components. Preferably, at least one washer 24 is located between the belleville spring 20 and the retaining element 22. In this particular example a screw is provided as the fixing element 22.
The belleville springs 20 minimize the clearance between the drive wheel 12 and the drive shaft 14. This reduces the losses of the motor shaft in particular. In addition, greater motor power, greater torque and greater rotational speed are thereby achieved.
Fig. 3 shows a schematic perspective view of a chainsaw 10 according to a preferred embodiment of the present invention.
The chainsaw 10 has a drive wheel 12, a belleville spring 20, and a stationary element 22. The chainsaw 10 also has a saw chain and a guide rail for the saw chain, which are not shown in fig. 3 for clarity.
The motor and drive shaft 14 are located inside the chainsaw 10. The drive wheel 12, the disk spring 20 and the fixing element 22 are fixed at the outer end of the drive shaft 14. The motor is arranged to drive the drive shaft 14 and the drive wheel 12. The drive wheel 12 is in turn arranged for driving a saw chain.
The drive wheel 12, the disk spring 20 and the fastening element 22 are accessible from the outside, so that the fastening element 22 and the disk spring 20 and the drive wheel 12 can be removed and, if necessary, replaced in a simple manner.
The belleville springs 20 between the drive wheel 12 and the stationary element 22 minimize play between the drive wheel 12 and the drive shaft 14 or motor shaft. In this way, the losses of the motor shaft and the motor are reduced. In addition, the disk spring 20 achieves greater motor power, greater torque and greater rotational speed. For example, a motor power of 1800W and a speed of 13000RPM can be achieved.
In addition, the Belleville spring 20 reduces the noise impact of the chain saw 10. Finally, in the case of a conventional chain saw, the disk spring 20 can also be provided with a screw as the fastening element 22.
Fig. 4 shows a schematic perspective exploded view of the drive wheel 12 and other elements for the chainsaw 10, according to a first example of the prior art. In addition to the drive wheel 12, the chain saw is equipped with a spacer plate 16, a screw connection 18 and a fastening element 22. In the installed state, the drive shaft 14 passes through the screw connection 18, the spacer disk 16 and the drive wheel 12. The fixing element 22 can be fixed at the open end of the drive shaft 14. In this example, a locking plate is provided as the fixing element 22.
Fig. 5 shows a schematic perspective exploded view of the drive wheel 12 and other elements for the chainsaw 10 according to a second example of the prior art. In this example, the drive shaft 14 passes through the drive wheel 12 and the side disc 26. A locking ring is used as the fixing element 22.
Fig. 6 shows a schematic side view of the drive wheel 12 and other elements for the chainsaw 10 according to a second example of the prior art. Fig. 6 shows the drive wheel 12, the drive shaft 14 and the side disk 26 in the mounted state, wherein the drive wheel 12 and the side disk 26 are fastened to the drive shaft 14 by means of a locking ring.
The driving wheel 12 and its fixed structure according to the prior art are suitable for a maximum power of about 1500W and cause premature wear of the motor shaft. This results in high costs since the motor needs to be replaced in case of loss of the motor shaft.
List of reference numerals
10 chain saw
12 driving wheel
14 drive shaft
16 spacing disc
18 spiral connecting piece
20 disc spring
22 fixing element
24 gasket
26 side discs.
Claims (11)
1. A chainsaw, the chainsaw having:
a drive wheel (12) for driving the saw chain,
a drive shaft (14) coupled to the drive wheel (12),
a motor for driving the drive shaft (14), and
a fixing element (22) for fixing the drive wheel (12) to the drive shaft (14),
characterized in that the chainsaw further has at least one belleville spring (20) disposed between the drive wheel (12) and the stationary element (22).
2. A chainsaw according to claim 1, wherein the fixing element (22) is fixed at an open end of the drive shaft (14).
3. A chainsaw according to claim 1 or 2, wherein the fixing element (22) is designed as a screw.
4. A chainsaw according to claim 3, wherein the screw extends coaxially with the drive shaft (14) in the fixed state.
5. A chainsaw according to claim 1 or 2, wherein at least one washer (24) is provided between the belleville spring (20) and the fixing element (22).
6. The chainsaw of claim 1 or 2, wherein the chainsaw (10) has a saw chain detachably mounted at the chainsaw (10).
7. The chainsaw of claim 1 or 2, wherein the chainsaw (10) has a guide rail for the saw chain, which guide rail is detachably fixed at the chainsaw (10).
8. The chainsaw of claim 1 or 2, wherein the chainsaw (10) is arranged for a power of more than 1500W.
9. A chainsaw according to claim 1 or 2, wherein the chainsaw (10) is arranged for a rotational speed of more than 12000 RPM.
10. A chainsaw according to claim 1 or 2 wherein the motor is an electric motor arranged to be powered by the mains and/or by a battery.
11. A chainsaw according to claim 1 or 2 wherein the motor is an internal combustion engine.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE202019105972.9U DE202019105972U1 (en) | 2019-10-28 | 2019-10-28 | chainsaw |
| DE202019105972.9 | 2019-10-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213646139U true CN213646139U (en) | 2021-07-09 |
Family
ID=68725124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022394488.4U Active CN213646139U (en) | 2019-10-28 | 2020-10-23 | Chain saw |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN213646139U (en) |
| DE (1) | DE202019105972U1 (en) |
-
2019
- 2019-10-28 DE DE202019105972.9U patent/DE202019105972U1/en active Active
-
2020
- 2020-10-23 CN CN202022394488.4U patent/CN213646139U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE202019105972U1 (en) | 2019-11-07 |
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