WO2018141105A1

WO2018141105A1 - Chainsaw

Info

Publication number: WO2018141105A1
Application number: PCT/CN2017/072936
Authority: WO
Inventors: 付慧星; 聂方杰
Original assignee: 南京德朔实业有限公司
Priority date: 2017-02-06
Filing date: 2017-02-06
Publication date: 2018-08-09

Abstract

A chainsaw, comprising: a main machine body (10), a guide plate (20) and an accessory device (30), which is used for fixing the guide plate (20) and tensioning a chain (21); the accessory device (30) is detachably combined with the main machine body (10), and the accessory device (30) moves between a combination position at which the same is combined with the main machine body (10) and a separation position at which the same is separated from the main machine body (10); the accessory device (30) comprises a driving spring (311), an operation member (321) and a locking member (331), the locking member (331) moving between a first position at which the driving spring (311) is locked in a compressed state and a second position at which the driving spring (311) is unlocked; when the accessory device (30) is in the separation position, the operation member (321) is operated by a user to compress the driving spring (311), and when the accessory device (30) moves from the separation position to the combination position, the locking member (331) moves to the second position at which the driving spring (311) is unlocked, the driving spring (311) driving the guide plate (20) away from a chain wheel (12) to tension the chain (21). The chain tensioning operation of the chainsaw is convenient, fast and efficient.

Description

Chain saw

Technical field

The invention relates to a chain saw.

Background technique

As a power tool, a chain saw includes a chain having a plurality of cutting portions for performing a cutting function. After a long period of work, the chain may be slack, and the slack chain not only affects the cutting performance, but also may cause danger and cause damage to the human body. The existing chain tensioning device has a complicated structure and is inconvenient to operate.

Summary of the invention

In order to solve the deficiencies of the prior art, it is an object of the present invention to provide a chain saw capable of quickly achieving chain tensioning.

In order to achieve the above objectives, the present invention adopts the following technical solutions:

A chain saw includes: a main body, a guide plate and an accessory device; the main body includes: a motor, a sprocket and a first housing; the sprocket is driven by a motor to rotate the chain to drive the chain; the first housing is for housing or mounting the motor The guide plate is used for guiding the chain; the accessory device is used for fixing the guide plate and tensioning the chain; the accessory device is detachably coupled to the main body; and the accessory device is moved between a combined position combined with the main body and a separated position separated from the main body. When the accessory device is in the combined position, the guide plate is fixed; when the accessory device is in the separated position, the guide plate is released, the chain is in a relaxed state; the accessory device includes: a drive spring, and the force applied to the guide plate to move the guide plate away from the sprocket; the operating member a user operable to compress the drive spring; a locking member that moves between a first position that locks the drive spring in the compressed state and a second position that unlocks the drive spring; and an elastic member that applies a movement to the first position of the lock member And a second housing for mounting the drive spring, the operating member, the locking member and the resilient member; the accessory device is in separation When set, the user operates the operation member is a compression drive spring; accessory device is separated from the position to the coupling position, the locking member is moved to the second position to unlock the drive spring; drive spring drives the guide plate away from the sprocket to achieve tensioning of the chain.

Further, the first housing is provided with a bump; and when the attachment device moves from the separated position to the engaged position, the bump drive locking member moves from the first position to the second position.

Further, the locking member is rotatably coupled to the second housing; the locking member is perpendicular to the axis of rotation of the second housing and the axis of rotation of the sprocket.

Further, a drive spring is disposed between the operating member and the second housing.

Further, the operating member is formed with a locking portion that can contact the locking member; when the locking member is in the first position, The locking member is in contact with the locking portion to maintain the drive spring in a compressed state.

Further, the guide plate is fixed with a pushing block, and the operating member is formed with a contact portion capable of contacting the pushing block; when the locking member is in the second position, the driving spring drives the operating member to move to drive the guiding plate to move.

A chain saw includes: a main body, a guide plate and an attachment device; the main body includes: a motor, a sprocket, a first housing and a fastening bolt; the sprocket is driven by a motor to rotate to drive the chain; the first housing is used for Accommodating or installing the motor; the fastening bolt protrudes from the first housing; the guide plate is used for guiding the chain; the accessory device is for fixing the guide plate and tensioning the chain; the accessory device is detachably coupled to the main body; and the accessory device is combined with the main body The joint position and a separate position from the main body are moved; when the accessory device is in the combined position, the guide plate is fixed; when the accessory device is in the separated position, the guide plate is released, the chain is in a relaxed state; the accessory device includes: a fastener Cooperating with the fastening bolt for fixing the guide plate; driving the spring to apply a force to the guide plate to move the guide plate away from the sprocket; the second housing for mounting the fastener and the drive spring; driving the spring drive when the fastener is loosened The guide plate is moved away from the sprocket to tension the chain.

Further, the accessory device includes: an operating member for the user to operate; when the accessory device is in the separated position, the operating member can be operated by the user to apply a force to the driving spring to elastically deform the driving spring; when the accessory device moves from the separated position to the coupled position Drive the spring drive guide away from the sprocket.

Further, a drive spring is disposed between the operating member and the second housing; the drive spring applies a force to the guide plate through the operating member.

Further, the accessory device further includes: a locking member movably coupled to the second housing; the locking member moving between the first position locking the drive spring in the elastically deformed state and the second position unlocking the drive spring; the elastic member, A force that moves toward the first position is applied to the locking member.

Further, the accessory device further includes: an operating member for the user to operate; and when the accessory device is in the separated position, the operating member can be operated by the user to apply a force to the driving spring to elastically deform the driving spring.

Further, the locking member is rotatably coupled to the second housing.

A chain saw includes: a main body, a guide plate and an accessory device, the main body includes: a motor, a sprocket and a first housing; the sprocket is driven by a motor to rotate to drive the chain; the first housing is for accommodating or mounting the motor The guide plate is used for guiding the chain; the accessory device is used for fixing the guide plate and tensioning the chain; the accessory device is detachably coupled to the main body; and the accessory device is moved between a combined position combined with the main body and a separated position separated from the main body. When the accessory device is in the combined position, the guide plate is fixed; when the accessory device is in the separated position, the guide plate is released, the chain is in a relaxed state; the accessory device includes: an energy storage device for releasing the action The energy of the guide plate to tension the chain; the operating device for the user to operate to apply a force to the energy storage device to cause the energy storage device to accumulate energy for release; and the second housing for mounting the energy storage device and operation The device is operable by the user to accumulate energy when the accessory device is in the disengaged position; when the accessory device is moved from the disengaged position to the engaged position, the energy storage device releases energy to drive the guide away from the sprocket to tension the chain.

Further, the accessory device further includes: a locking device that moves between a locked position of the locked energy storage device and an unlocked position that unlocks the energy storage device; when the accessory device moves from the separated position to the coupled position, the locking device is The locked position moves toward the unlocked position and the energy storage device releases energy to push the guide away from the sprocket to tension the chain.

Further, the energy storage device includes: a drive spring; the operating device includes an operating member operated by the user to compress the drive spring; the locking device includes: a locking member movably coupled to the second housing; the locking member in the first position and the first Moving between the two positions; when the locking member is in the first position, the locking member maintains the driving spring in a compressed state; when the locking member is in the second position, the driving spring pushes the guiding plate away from the sprocket.

Further, the first housing is provided with a bump that can contact the locking member; when the attachment device moves from the separated position to the engaged position, the bump drive locking member moves from the first position to the second position.

Further, the locking member is rotatably coupled to the second housing; the accessory device further includes an elastic member; and the elastic member applies a force to the locking member to move the locking member toward the first position.

Further, the operating member is formed with a locking portion that can be in contact with the locking member; when the locking member is in the first position, the locking member contacts the locking portion to maintain the driving spring in a compressed state.

Further, the locking member is rotatably coupled to the second housing.

The chain saw disclosed by the invention realizes the automatic tensioning of the chain during the process of installing the accessory device, reduces the operation steps of the chain tensioning; can achieve the same moderate tensioning force every time the tension is tightened, without human interpretation And apply tension; after the chain is relaxed, it is quick and easy to tighten again.

DRAWINGS

Figure 1 is a schematic view of a chain saw;

Figure 2 is a schematic view of another perspective view of the chain saw of Figure 1;

Figure 3 is an exploded view of the main body, the guide plate and the accessory device of the chain saw of Figure 1;

Figure 4 is a schematic view of the attachment device of the chain saw of Figure 1 in a separated position;

Figure 5 is an exploded view of the attachment structure, the motor, and the guide of the chain saw of Figure 4;

Figure 6 is an exploded view of another perspective of the structure of Figure 5;

Figure 7 is a schematic view showing the separation of the second left casing and the second right casing of the accessory device of Figure 4;

Figure 8 is a schematic view of the locking member of the accessory device of Figure 7 in a first position;

Figure 9 is a schematic illustration of the locking member of the accessory device of Figure 8 in a second position.

detailed description

The present invention will be specifically described below in conjunction with the accompanying drawings and specific embodiments.

As shown in FIGS. 1 to 3, the chain saw 100 includes a main body 10, a guide 20, and an attachment device 30.

The guide plate 20 is used to guide the chain 21. The chain 21 rotates around the guide 20.

The accessory device 30 is used to secure the guide 20 and tension the chain 21. The accessory device 30 is detachably coupled to the main body 10. The guide plate 20 is disposed between the main body 10 and the accessory device 30. The accessory device 30 and the main body 10 clamp the guide 20. The accessory device 30 is moved between a combined position that is coupled to the main body 10 and a separated position that is separate from the main body 10. The attachment device 30 of Figure 1 is in the engaged position and the guide 20 is secured. The guide plate 20 is clamped by the attachment device 30 and the main body 10. In Fig. 4, the accessory device 30 is in the disengaged position, the guide 20 is released and the chain 21 is in a relaxed state. The guide 20 is released, that is, the guide 20 is not clamped by the main body 10 and the attachment device 30. The user can remove the guide 20 or replace the chain 21. The chain 21 is in a relaxed state, that is, the chain 21 is not subjected to the force to tension it. Or the guide 20 is not subjected to the force of tensioning the chain 21.

As shown in FIGS. 2 to 4, the main body 10 includes a motor 11, a sprocket 12, and a first housing 13.

The motor 11 is used to drive the sprocket 12 to rotate. The sprocket 12 is used to drive the movement of the chain 21.

The motor 11 is mounted to the first housing 13. The first housing 13 includes a first left housing 133 and a first right housing 134. The first housing 13 houses the motor 11. The motor 11 is disposed in a housing chamber surrounded by the first left housing 133 and the first right housing 134. The motor 11 may be an internal combustion engine powered by fuel combustion or an electric motor powered by electric power. Specifically, the motor 11 is a motor. The chain saw 100 also includes a battery pack 111 that powers the motor 11. The battery pack 111 is detachably coupled to the first housing 13. The first housing 13 is formed with a main handle 131 for the user to hold. Chain saw 100 also includes an auxiliary handle 132. The auxiliary handle 132 is coupled to the first housing 13. The user can hold the main handle 131 and the auxiliary handle 132 separately with both hands.

As shown in FIG. 5 to FIG. 6 , the accessory device 30 includes: an energy storage device 31 , an operation device 32 , and a locking device The 33 and the second housing 34 are disposed.

The energy storage device 31 is capable of releasing energy to tension the chain 21, and the energy storage device 31 releases energy to move the guide 20 away from the sprocket 12 to tension the chain 21.

The operating device 32 is operated by a user to apply a force to the energy storage device 31 to cause the energy storage device 31 to accumulate energy for release.

The locking device 33 moves between a locked position that locks the energy storage device 31 and an unlocked position that unlocks the energy storage device 31. When the locking device 33 is in the locked position, the energy storage device 31 is unable to release energy. When the locking device 33 is in the unlocked position, the energy storage device 31 is capable of releasing energy to drive the guide 20 away from the sprocket 12, thereby tensioning the chain 21.

The energy storage device 31, the operating device 32, and the locking device 33 are mounted to the second housing 34.

When the accessory device 30 is in the disengaged position, the user can operate the operating device 32 to cause the energy storage device 31 to accumulate energy. When the accessory device 30 is moved from the disengaged position to the engaged position, the energy storage device 31 releases the energy to drive the guide 20 away from the sprocket 12 to tension the chain 21. Specifically, when the accessory device 30 is moved from the separated position to the coupled position, the locking device 33 is moved from the locked position to the unlocked position. When the locking device 33 is moved to the unlocked position, the energy storage device 31 releases energy to push the guide 20 away from the sprocket 12 to tension the chain 21. That is, when the accessory device 30 is in the disengaged position, the user can operate the operating device 32 to store the energy storage device 31. When the user operates the operating device 32 to store the energy storage device 31, the guide 20 is not subjected to the force to tension the chain 21. It is also not necessary to apply this force when the user installs the guide 20. During the user installation of the accessory device 30, the energy storage device 31 releases energy to drive the guide 20 away from the sprocket 12 to tension the chain 21.

A conventional chain saw 100 with automatic tensioning. The force of the guide plate 20 is directly applied to the guide plate 20 by the spring to move the guide plate 20. It is necessary to overcome the force of the spring when installing the guide 20 and the chain 21. That is, when the user installs the guide 20, it is necessary to grip the guide 20 and push the guide 20 toward the sprocket 12 to compress the spring.

The chain saw 100 is provided with a separate operating device 32, which does not require the user to hold the guide plate 20 for energy storage, thereby avoiding touching the chain 21 during the installation process, thereby improving safety performance. The user can store the energy storage device 31 by operating the operating device 32, and the energy storage process is comfortable and quick. In the assembly process of the guide 20, the chain 21 and the accessory device 30, in the first step, the guide 20 and the chain 21 need to be installed first; and in the second step, the accessory device 30 is mounted. In the first step, during the installation of the guide 20 and the chain 21, the guide 20 is not subjected to The force away from the sprocket 12 or the chain 21 is not subjected to the force that causes it to be tensioned. That is to say, the user does not need to apply a force to the guide plate 20 to overcome the automatic tensioning thereof, and the installation of the chain 21 and the guide plate 20 is convenient and quick. In the second step, during the process of installing the accessory device 30, the guide 20 is tensioned by the force of the sprocket 12 away from the chain 21. The tensioning operation is quick and easy. Further, since the force for tensioning the chain 21 is provided by the attachment device 30, after the attachment device 30 is removed, the guide 20 and the chain 21 are in a relaxed state. That is, the guide plate 20 is not subjected to the force, and the guide plate 20 is not caused to fly out when the guide plate 20 is removed, which has high safety and the disassembly process is convenient and quick.

As shown in FIGS. 4 to 7, the energy storage device 31 includes a drive spring 311. The drive spring 311 is elastically deformed by an external force to store energy. The drive spring 311 releases the stored energy by changing from the elastically deformed state to the free state. The drive spring 311 applies a force to the guide 20 to move the guide 20 away from the sprocket 12 to tension the chain 21.

The operating device 32 includes an operating member 321. The operating member 321 can be biased by the user to apply a force to the drive spring 311 to elastically deform the drive spring 311. That is, the drive spring 311 stores energy under the action of the operating member 321. When the accessory device 30 is in the separated state, the user can operate the operating member 321 to apply a force for elastically deforming the drive spring 311 to the drive spring 311, thereby causing the drive spring 311 to store energy when the accessory device 30 is in the disengaged state.

The locking device 33 includes a locking member 331. The locking member 331 is movably coupled to the second housing 34. Specifically, the locking member 331 is rotatably coupled to the second housing 34. The axis of rotation of the locking member 331 with respect to the second housing 34 is perpendicular to the axis of rotation of the sprocket 12. The locking member 331 moves between the first position and the second position. In Figure 8, the locking member 331 is in the first position and the locking device 33 is in the locked position. In Fig. 9, the locking member 331 is in the second position and the locking device 33 is in the unlocked position. When the locking member 331 is in the first position, the locking member 331 locks the drive spring 311 in an elastically deformed state. When the locking member 331 is in the second position, the locking member 331 unlocks the drive spring 311. The drive spring 311 changes from the elastically deformed state to the free state, thereby generating a force externally. When the accessory device 30 is moved from the separated position to the coupled position, the drive spring 311 drives the guide 20 away from the sprocket 12. Specifically, when the lock piece 331 moves from the separated position to the joint position, the lock piece 331 moves from the first position to the second position. When the lock member 331 is moved to the second position, the drive spring 311 is unlocked, so that the guide spring 20 is driven away from the sprocket 12 by the drive spring 311.

The drive spring 311, the operating member 321 and the locking member 331 are mounted to the second housing 34. The second housing 34 includes a second left housing 341 and a second right housing 342. Drive spring 311, operating member 321 and locking member 331 It is disposed between the second left housing 341 and the second right housing 342.

The drive spring 311 may be a compression spring or a tension spring. Specifically, the drive spring 311 is a compression spring. The operating member 321 is operated by a user to compress the drive spring 311 to store energy. The drive spring 311 releases energy when changing from the compressed state to the free state, pushing the guide 20 away from the sprocket 12. When the locking member 331 is in the first position, the locking member 331 holds the drive spring 311 in a compressed state. When the locking member 331 is in the second position, the drive spring 311 pushes the guide 20 away from the sprocket 12. The drive spring 311 is disposed between the operating member 321 and the second housing 34. Both ends of the drive spring 311 are connected to the operating member 321 and the second housing 34, respectively. The urging force of the drive spring 311 for tensioning the chain 21 is transmitted to the guide 20 through the operating member 321.

The accessory device 30 further includes an elastic member 35 that applies a force to the locking member 331 to move toward the first position. The elastic member 35 is disposed between the second housing 34 and the locking member 331. The elastic member 35 may be a spring piece or a spring. in particular. The elastic member 35 is a compression spring. Both ends of the elastic member 35 are connected to the second housing 34 and the locking member 331, respectively.

As shown in FIGS. 5 to 9, the operating member 321 is slidably coupled to the second housing 34. The operating member 321 is formed with a locking portion 322 that is in contact with the locking member 331.

When the locking member 331 is in the first position, the locking member 331 is in contact with the locking portion 322 to maintain the drive spring 311 in the compressed position.

The operating member 321 is formed with a contact portion 323. The guide plate 20 is fixed with a push block 22. The contact portion 323 is in contact with the push block 22, and when the lock member 331 is in the second position, the drive spring 311 drives the operation member 321 to move, and the operation member 321 moves the guide plate 20 by the contact of the contact portion 323 with the push block 22.

The first housing 13 is provided with a bump 135. The bump 135 may be formed by the first housing 13 or may be fixed to the first housing 13. When the accessory device 30 is moved from the separated position to the coupled position, the bump 135 drives the locking member 331 to move from the first position to the second position. Specifically, as the attachment device 30 moves from the separation position associated engagement position, the length of the projection 135 deepens into the second housing 34 becomes longer, the projection 135 contacts the locking member 331 and pushes the locking member 331 to move, so that the locking member 331 Moving from the first position shown in Figure 8 to the second position shown in Figure 9.

As shown in Figures 3, 5 and 6, the accessory device 30 includes a fastener 36. The main body 10 includes a fastening bolt 14. The fastening bolt 14 protrudes from the first housing 13. The fastening bolt 14 is coupled to the fastener 36 through the second housing 34 for securing the guide 20. The fastener 36 constitutes a knob for user manipulation. User can The fastener 36 is manually rotated to secure the accessory device 30 to the main body 10.

After a period of use, the guide plate 20 and the chain 21 are loosened by the external force. At this time, the user can rotate the fastener 36 to loosen the fastener 36, and the driving spring 311 applies a force to the guide plate 20 to drive the guide plate 20 away from the chain. The wheel 12 thus tensions the chain 21. After tensioning the chain 21, the user can tighten the fasteners 36 to clamp the guides 20 in reverse. The operation of the tension chain 21 is convenient and quick.

When the user needs to replace the chain 21 and the guide 20, the user can rotate the fastener 36 to disengage the fastener 36 from the fastening bolt 14. The accessory device 30 is separated from the main body 10. After the user replaces the chain 21 and the guide 20, the chain 21 and the guide 20 are placed in a position to be coupled with the main body 10. At this time, the guide 20 and the chain 21 are still in a relaxed state.

The user operates the operating member 321 to push the operating member 321 to move the compression driving spring 311. The locking member 331 is biased by the elastic member 35 to be held in the first position. That is, the drive spring 311 is locked in the compressed state. The user completes the compression and locking of the drive spring 311 when the accessory device 30 is in the disengaged position.

When the user performs the accessory device 30, the fastening bolt 14 is passed through the second housing 34 and corresponds to the fastener 36. The user rotates the fastener 36 to bring the accessory device 30 toward the main body 10, that is, the accessory device 30 moves toward the engaged position, and the bump 135 comes into contact with the locking member 331 during the movement. Since the attachment device 30 approaches the main body 10, the projection 135 pushes the locking member 331 against the urging force of the elastic member 35 to rotate the locking member 331 and finally moves the locking member 331 to the second position. The compression spring is unlocked, the compression spring pushes the movement member 321 to move, and the operating member 321 drives the push block 22 to move to drive the guide plate 20 to move, thereby realizing the tensioning chain 21.

The basic principles, main features and advantages of the present invention have been shown and described above. It should be understood by those skilled in the art that the above embodiments are not intended to limit the invention in any way, and the technical solutions obtained by means of equivalent substitution or equivalent transformation are all within the scope of the invention.

Claims

A chain saw that includes:

Host body, including:

motor;

a sprocket driven by the motor to drive the chain to move; and

a first housing for housing or mounting the motor;

a guide plate for guiding the chain; and

An accessory device for fixing the guide plate and tensioning the chain; the accessory device is detachably coupled to the main body;

The accessory device moves between a combined position coupled to the main body and a separated position separated from the main body;

The guide plate is fixed when the accessory device is in the combined position;

When the accessory device is in the separated position, the guide plate is released, and the chain is in a relaxed state;

The accessory device includes:

Driving a spring to apply a force to the guide plate to move the guide plate away from the sprocket;

An operating member for a user to operate to compress the drive spring;

a locking member moving between a first position in which the drive spring is locked in a compressed state and a second position in which the drive spring is unlocked;

An elastic member that applies a force to move the first position to the locking member; and

a second housing for mounting the drive spring, the operating member, the locking member and the elastic member;

When the accessory device is in the separated position, the operating member is operated by the user to compress the driving spring;

The locking member moves to a second position that unlocks the drive spring when the accessory device is moved from the disengaged position to the engaged position; the drive spring drives the guide away from the sprocket to effect tensioning the chain.
A chainsaw according to claim 1 wherein:

The first housing is provided with a bump;

The bump drives the locking member to move from the first position to the second position as the attachment device moves from the disengaged position to the engaged position.
A chainsaw according to claim 1 wherein:

The locking member is rotatably coupled to the second housing;

The locking member is perpendicular to the axis of rotation of the second housing relative to the axis of rotation of the sprocket.
A chainsaw according to claim 1 wherein:

The drive spring is disposed between the operating member and the second housing.
A chainsaw according to claim 1 wherein:

The operating member is formed with a locking portion that can contact the locking member;

When the locking member is in the first position, the locking member contacts the locking portion to maintain the drive spring in a compressed state.
A chainsaw according to claim 5, wherein:

The guide plate is fixed with a push block,

The operating member is formed with a contact portion that can contact the pushing block;

When the locking member is in the second position, the driving spring drives the operating member to move to drive the guide plate to move.
A chain saw that includes:

Host body, including:

motor;

a sprocket driven by the motor to drive the chain to move;

a first housing for housing or mounting the motor; and

Fastening a bolt protruding from the first housing;

a guide plate for guiding the chain;

An accessory device for fixing the guide plate and tensioning the chain; the accessory device is detachably coupled to the main body;

The accessory device moves between a combined position coupled to the main body and a separated position separated from the main body;

The guide plate is fixed when the accessory device is in the combined position;

When the accessory device is in the separated position, the guide plate is released, and the chain is in a relaxed state;

The accessory device includes:

a fastener engaged with the fastening bolt for fixing the guide plate;

Driving a spring to apply a force to the guide plate to move the guide plate away from the sprocket;

a second housing for mounting the fastener and the drive spring;

The drive spring drives the guide plate away from the sprocket to tension the chain when the fastener is released.
A chain saw according to claim 7, wherein:

The accessory device includes:

Operating parts for user operation;

When the accessory device is in the separated position, the operating member can be operated by the user to apply a force to the driving spring to elastically deform the driving spring;

The drive spring drives the guide plate away from the sprocket as the accessory device moves from the disengaged position to the engaged position.
A chainsaw according to claim 8 wherein:

The drive spring is disposed between the operating member and the second housing;

The drive spring applies a force to the guide plate through the operating member.
A chain saw according to claim 7, wherein:

The accessory device further includes:

a locking member movably coupled to the second housing; the locking member moving between a first position in which the drive spring is locked in an elastically deformed state and a second position in which the drive spring is unlocked;

An elastic member that applies a force to the locking member to move to the first position.
A chainsaw according to claim 10, wherein:

The accessory device further includes:

Operating parts for user operation;

When the accessory device is in the disengaged position, the operating member can be operated by a user to apply a force to the drive spring to elastically deform the drive spring.
A chainsaw according to claim 10, wherein:

The locking member is rotatably coupled to the second housing.
A chain saw that includes:

Host body, including:

motor;

a sprocket driven by the motor to drive the chain to move; and

a first housing for housing or mounting the motor;

a guide plate for guiding the chain; and

An accessory device for fixing the guide plate and tensioning the chain; the accessory device is detachably coupled to the main body;

The accessory device moves between a combined position coupled to the main body and a separated position separated from the main body;

The guide plate is fixed when the accessory device is in the combined position;

When the accessory device is in the separated position, the guide plate is released, and the chain is in a relaxed state;

The accessory device includes:

An energy storage device for releasing energy acting on the guide to tension the chain;

Operating means for the user to apply a force to the energy storage device to cause the energy storage device to accumulate for release Energy; and

a second housing for mounting the energy storage device and the operating device;

When the accessory device is in the separated position, the operating device can be operated by a user to cause the energy storage device to accumulate energy;

When the accessory device moves from the disengaged position to the coupled position, the energy storage device releases energy to drive the guide away from the sprocket to tension the chain.
A chainsaw according to claim 13 wherein:

The accessory device further includes:

a locking device that moves between a locked position that locks the energy storage device and an unlocked position that unlocks the energy storage device;

The locking device moves from the locked position to the unlocked position when the accessory device moves from the disengaged position to the engaged position, the energy storage device releases energy to push the guide away from the sprocket to tension the chain .
A chainsaw according to claim 14 wherein:

The energy storage device includes: a drive spring;

The operating device includes an operating member operated by a user to compress the driving spring;

The locking device includes: a locking member movably coupled to the second housing; the locking member moving between the first position and the second position;

The locking member maintains the drive spring in a compressed state when the locking member is in the first position;

The drive spring urges the guide plate away from the sprocket when the locking member is in the second position.
A chainsaw according to claim 15 wherein:

The first housing is provided with a bump that can contact the locking member;

The bump drives the locking member to move from the first position to the second position as the attachment device moves from the disengaged position to the engaged position.
A chainsaw according to claim 15 wherein:

The locking member is rotatably coupled to the second housing;

The accessory device further includes an elastic member;

The elastic member applies a force to the locking member to move the locking member toward the first position.
A chainsaw according to claim 15 wherein:

The operating member is formed with a locking portion that can contact the locking member;

When the locking member is in the first position, the locking member contacts the locking portion to keep the driving spring in compression status.
A chainsaw according to claim 15 wherein:

The guide plate is fixed with a push block,

The operating member is formed with a contact portion that can contact the pushing block;

When the locking member is in the second position, the driving spring drives the operating member to move to drive the guide plate to move.
A chainsaw according to claim 15 wherein:

The locking member is rotatably coupled to the second housing.