CN219563447U - Chain saw - Google Patents

Abstract

The utility model discloses a chain saw, and belongs to the technical field of handheld electric equipment. This chain saw includes casing, cutting assembly, the motor, drive assembly, lubrication assembly and lower hand protector, the casing is formed with accommodation space, the casing is including the portion of gripping that supplies the user to grip, cutting assembly is including the saw chain that is used for carrying out cutting operation, the motor sets up in accommodation space, the motor is used for carrying out cutting operation for the saw chain and provides power, drive assembly connects between motor and cutting assembly, drive assembly is used for realizing the transmission of power, lubrication assembly is used for realizing the lubrication to the saw chain, lower hand protector is connected in the below of portion of gripping, lubrication assembly includes the oilcan, the oilcan at least part sets up in or forms in lower hand protector. This chain saw is through placing the oilcan in the hand protector down, can make full use of hand protector inside space down, not only does benefit to the size of reducing the main part of chain saw, realizes the miniaturization of chain saw, and can improve user's use experience.

Description

Chain saw

Technical Field

The utility model relates to the technical field of handheld electric equipment, in particular to a chain saw.

Background

A chain saw is a power tool that relies on the lateral movement of staggered L-shaped blades on a saw chain for cutting action, commonly used for felling and making materials. The saw chain of chain saw need use the lubricating oil lubrication in the course of working to reach the cooling and alleviate the effect of saw chain wearing and tearing, consequently need set up the oilcan that holds lubricating oil in the chain saw inside. In the existing chain saw, the oilcan is generally arranged in the holding part of the chain saw or near the motor, so that the volume of a main machine part of the chain saw is increased, the miniaturization of the chain saw is not facilitated, and the use experience of a user is reduced.

Disclosure of Invention

The utility model aims to provide a chain saw, which has compact internal structure, smaller volume and higher user experience.

To achieve the purpose, the utility model adopts the following technical scheme:

a chain saw, comprising: a housing formed with an accommodation space, the housing including a grip portion for a user to grip; a cutting assembly including a saw chain for performing a cutting operation; a motor disposed in the accommodation space, the motor being configured to power the saw chain to perform a cutting operation; the transmission assembly is connected between the motor and the cutting assembly and is used for realizing power transmission; a lubrication assembly for effecting lubrication of the saw chain; the chain saw further comprises: the lower hand guard is connected to the lower part of the holding part; the lubrication assembly includes an oilcan at least partially disposed or formed within the lower hand guard.

In some embodiments, at least a portion of the outer shell of the lower hand guard forms an oil can shell of the oil can, and a containing space for containing lubricating oil is formed in the lower hand guard; or, the oil can comprises an oil can shell, and the oil can shell is connected with the inner wall surface of the shell of the lower hand guard.

In some embodiments, the thickness of the lower hand guard is 5mm or more and 20mm or less.

In some embodiments, the lubrication assembly further comprises an oil pump disposed within the lower hand guard.

In some embodiments, the lubrication assembly further comprises an oil pump disposed within the grip.

In some embodiments, the lubrication assembly further comprises an oil suction pipe, one end of the oil suction pipe is communicated with an oil inlet of the oil pump, and the other end of the oil suction pipe extends into the oil can.

In some embodiments, the oil pump is disposed at a middle position of the grip portion, and the oil suction pipe extends from front to back into the lower hand guard.

In some embodiments, the oil pump is disposed at a middle position of the grip portion, and the oil suction pipe extends from rear to front into the lower hand guard.

In some embodiments, the lubrication assembly further comprises an oil drain pipe having one end in communication with an oil outlet of the oil pump and the other end extending to the saw chain.

In some embodiments, the oilcan has a filler opening disposed on an upper surface of the lower hand guard.

The utility model has the beneficial effects that:

the chain saw comprises a shell, a cutting assembly, a motor, a transmission assembly and a lubrication assembly, wherein an accommodating space is formed in the shell, the shell comprises a holding part for holding by a user, the cutting assembly comprises a saw chain for executing cutting operation, the motor is arranged in the accommodating space and is used for providing power for the saw chain to execute the cutting operation, the transmission assembly is connected between the motor and the cutting assembly and is used for realizing power transmission, the lubrication assembly is used for realizing lubrication of the saw chain, a lower hand guard is connected below the holding part, the lubrication assembly comprises an oilcan, and the oilcan is at least partially arranged or formed in the lower hand guard. This chain saw is through setting up the oilcan in hand protector down, can make full use of hand protector inside space down, not only does benefit to the size of reducing the main part of chain saw, realizes the miniaturization of chain saw, and can improve user's use experience.

Drawings

FIG. 1 is a schematic view of a chain saw according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a chain saw provided in an embodiment of the present utility model;

FIG. 3 is a schematic view showing an internal structure of a chain saw according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a chain saw according to an embodiment of the present utility model with the lower guard completely detached;

FIG. 5 is a schematic view of a lower hand guard and switch lock of a chain saw provided by an embodiment of the present utility model;

FIG. 6 is a schematic view of a chain saw according to an embodiment of the present utility model with one end of a lower guard detached;

fig. 7 is a schematic view of a switch lock of a chain saw provided by an embodiment of the present utility model.

In the figure:

100. a housing; 101. a motor housing; 102. a grip portion; 103. an annular sidewall; 104. a trigger; 110. an accommodation space; 120. an air inlet; 130. an air outlet;

200. a cutting assembly;

300. a motor;

400. a circuit board;

500. a battery pack;

600. a lubrication assembly; 610. an oilcan; 620. an oil pump; 630. an oil suction pipe; 640. an oil drain pipe;

700. a lower hand guard; 710. a limiting hole;

800. an upper shield;

900. a switch lock; 910. and a limit column.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 6, the present utility model provides a chain saw including a housing 100, a cutting assembly 200, a motor 300, a transmission assembly, and a circuit board 400. The housing 100 is a main mounting part of the chain saw, the housing 100 has a receiving space 110 formed therein, the motor 300, the driving part and the circuit board 400 are all disposed in the receiving space 110, and the cutting assembly 200 is mounted to the front end of the housing 100. Specifically, the housing 100 includes a motor housing portion 101 for housing the motor 300, and a grip portion 102 for a user to grip, the motor housing portion 101 being configured to house the motor 300. The cutting assembly 200 is used to perform a cutting operation. The motor 300 is disposed in the accommodation space 110 corresponding to the motor accommodation part 101, and the motor 300 is used to power the cutting assembly 200 to perform a cutting operation. A transmission assembly is connected between the motor 300 and the cutting assembly 200, the transmission assembly being used to effect the transmission of power.

In order to radiate heat from components including the motor 300 and the circuit board 400 in the chain saw, the housing 100 is provided with the air inlet 120 and the air outlet 130 which are communicated with the accommodating space 110, the air inlet 120 and the air outlet 130 are positioned at the front side of the holding part 102 in the front-back direction, and radiating air flows from the air inlet 120 into the accommodating space 110 and from the air outlet 130 flow through the circuit board 400 and the motor 300, so that the circuit board 400 and the motor 300 are radiated. The front side of the grip 102 is understood to be the front side of the hand that is gripped by the grip 102 when the user is holding the chain saw for work. In some embodiments, the heat dissipation airflow flowing through the circuit board 400 includes the heat dissipation airflow flowing over or near the surface of the circuit board 400. In some more specific embodiments, in the direction from the back to the front of the saw chain, the circuit board 400, the air inlet 120 and the air outlet 130 are sequentially arranged, and the heat dissipation air flowing from the air inlet 120 does not directly flow through the circuit board 400, but can still take the heat on the circuit board 400 under the action of the negative pressure due to the promotion of the air flow near the circuit board 400. Compared with a chain saw with an air inlet arranged behind a holding part in the prior art, the chain saw provided by the embodiment of the utility model has the advantages that the air inlet 120 and the air outlet 130 are arranged on the front side of the holding part 102, so that the air inlet 120 is not shielded when a user holds the holding part 102 of the chain saw, the air inlet 120 is not influenced, the area of the air inlet 120 can be set larger, the heat dissipation effect is improved, the holding comfort of the user is improved while the whole machine size is reduced, and the heat dissipation efficiency is better. Of course, in some embodiments, the air intakes 120 may be provided on both the front and rear sides of the grip portion 102.

As shown in fig. 2, the casing 100 is of a split structure, and the casing 100 is formed by splicing a left casing and a right casing, and an accommodating space 110 is defined by an inner wall surface of the left casing and an inner wall surface of the right casing. The shell 100 formed by splicing the left shell and the right shell is low in manufacturing difficulty, and other components can be easily assembled in the shell 100 and outside the shell 100. Of course, in other embodiments of the present utility model, the housing 100 may be formed by splicing an upper housing and a lower housing, or by splicing a plurality of housings.

The cutting assembly 200 includes a saw chain, a guide plate mounted at the front end of the housing 100 and vertically disposed, a saw chain sleeved on the guide plate and capable of moving around the guide plate under the guide action of the guide plate, and an upper guard 800 fixed over the guide plate and the saw chain and used for protecting the saw chain. The guide plate extends substantially in the front-rear direction. The saw chain moves in the vertical plane so as to realize the cutting operation of the workpiece to be cut. It should be noted that, the area where the cutting assembly 200 is located is a cutting area of the chain saw, and the vertical surface where the saw chain is located is a cutting plane of the chain saw. In some embodiments, as shown in fig. 2, the cutting assembly 200 is attached to one side of the housing 100, for example, to the left side of the left chassis or to the right side of the right chassis.

The motor 300 is disposed in the corresponding receiving space 110 of the motor receiving part 101 of the housing 100, and an output shaft of the motor 300 is disposed in a substantially horizontal direction, i.e., an extending direction of the output shaft of the motor 300 is substantially perpendicular to a cutting plane of the cutting assembly 200. The output shaft of the motor 300 faces one side of the cutting assembly 200, and when the cutting assembly 200 is coupled to the left side of the left casing, the output end of the output shaft is positioned at the left side of the motor 300. In some embodiments, the motor 300 is a servo motor or a stepper motor. A fan is connected to the other end of the output shaft of the motor 300, and can synchronously rotate along with the output shaft of the motor 300 to realize heat dissipation of the motor 300.

The transmission assembly is connected between the output shaft of the motor 300 and the saw chain, specifically, the transmission assembly is a gear box, the gear box comprises a box body, a box cover and a planetary gear mechanism, the planetary gear mechanism is arranged in a space defined by the box body and the box cover and comprises an outer gear ring, a planetary gear frame, planetary gears and a sun gear, the planetary gears are rotationally connected to the planetary gear frame through a pin shaft, the sun gear is meshed with the planetary gears, the output shaft of the motor 300 is connected with the sun gear, the outer gear ring is sleeved outside the planetary gear frame and meshed with the planetary gears, a planetary gear frame shaft of the planetary gear frame penetrates through the box cover and is connected with a sprocket, and the sprocket is meshed with the saw chain. The output shaft of the motor 300 can output torque and rotating speed to the chain wheel through the decelerating effect of the transmission assembly, the chain wheel rotates to drive the saw chain to move, and the saw chain can cut the workpiece to be cut.

In some embodiments, the air inlet 120 is disposed on a side of the motor housing 101 away from the cutting area of the cutting assembly 200, and the air outlet 130 is disposed on a side of the motor housing 101 near the cutting area of the cutting assembly 200. This arrangement prevents the chips generated by the chain saw during the cutting operation from being sucked into the chain saw through the air inlet 120. Of course, in some other embodiments, the air inlet 120 and the air outlet 130 may be vertically arranged, for example, the air inlet 120 is disposed above the air outlet 130, or the air outlet 130 is disposed above the air inlet 120.

With continued reference to fig. 2, the motor housing portion 101 of the housing 100 has an annular sidewall 103 protruding from the grip portion 102, the air inlet 120 is formed on a side of the annular sidewall 103 near the grip portion 102, and the air outlet 130 is formed on a side of the annular sidewall 103 far from the grip portion 102. So that the air inlet 120 is disposed towards the rear, and the air outlet 130 is disposed towards the front, which is more beneficial to the air entering and exiting the chain saw to form heat dissipation air flow, and is beneficial to increasing the air inlet area of the air inlet 120 and the air outlet area of the air outlet 130.

In some embodiments, the air inlet 120 and the air outlet 130 are located on the same housing of the housing 100 and on the same side of the chain saw as the fan located in the housing 100, the fan is sleeved on the output shaft of the motor 300 and can rotate along with the output shaft, and the air inlet 120 and the air outlet 130 are located on two sides of the fan. The flow speed of the heat dissipation air flow can be quickened by the arrangement, and the heat dissipation effect is improved. The transmission assembly and the fan are connected to both sides of the output shaft of the motor 300.

With continued reference to fig. 2, a circuit board 400 is disposed adjacent to the motor 300, the circuit board 400 being disposed on a side of the motor 300 adjacent to the grip 102. The circuit board 400 is arranged near the motor 300, so that the heat dissipation effect on the circuit board 400 can be improved, and the overall size of the chain saw can be reduced, thereby being beneficial to realizing the miniaturization design of the chain saw. In some embodiments, a controller is disposed on the circuit board 400, and a driving circuit electrically connected to the motor 300 is disposed, and control of the motor 300 can be achieved through the circuit board 400.

Referring to fig. 1 and 2, the chain saw in this embodiment further includes a battery pack 500 for providing power to the chain saw. Specifically, the battery pack 500 is detachably connected to the chain saw and disposed in a space formed by the grip 102. The chain saw also includes a trigger 104 for operation by a user. When the user presses the trigger 104, the motor 300 is electrically connected to the battery pack 500. In some embodiments, the trigger 104 is also configured to adjust the rotational speed of the motor 300. In the above embodiment, the air inlet 120 is disposed at the front side of the grip portion 102, which is advantageous for reducing the distance between the trigger 104 and the rear end of the battery pack 500. In this embodiment, the air intake 120 is at least partially disposed on the front side of the trigger 104 in the front-rear direction.

With continued reference to fig. 3, the chain saw further includes a battery pack 500, and the battery pack 500 is disposed in the accommodating space 110 corresponding to the grip 102. The circuit board 400 is disposed between the motor 300 and the battery pack 500. Of course, in some embodiments, the battery pack 500 may also be detachably connected to the outside of the grip 102.

With continued reference to fig. 3, the chain saw further includes a lubrication assembly 600, the lubrication assembly 600 is used for implementing lubrication of the saw chain, the lubrication assembly 600 includes an oil can 610, an oil pump 620, an oil suction pipe 630 and an oil discharge pipe 640, the oil can 610 is used for containing lubricating oil, the oil pump 620 is used for providing power for flowing of the lubricating oil, one end of the oil suction pipe 630 is communicated with an oil inlet of the oil pump 620, the other end of the oil suction pipe 630 extends into the oil can 610, one end of the oil discharge pipe 640 is communicated with an oil outlet of the oil pump 620, and the other end of the oil discharge pipe 640 extends to the saw chain. The lubricating oil in the oilcan 610 can be transported to the saw chain through the oil suction pipe 630, the oil pump 620 and the oil discharge pipe 640 under the driving of the oil pump 620 to lubricate the saw chain.

In some embodiments, the oil outlet end of the oil drain pipe 640 is connected with an oil outlet nozzle, the oil outlet nozzle extends into the sealing ring, the sealing ring is fixedly arranged on the shell 100, lubricating oil in the oil drain pipe 640 flows into an oil collecting cavity between the sealing ring and the shell 100 through the oil outlet nozzle, and the lubricating oil passes through the oil collecting cavity and is stuck with the lubricating oil in the moving process of the saw chain, so that the saw chain is lubricated. In some more specific embodiments, the oil drain tube 640, the oil drain nozzle, and the seal ring are integrated, thereby achieving cost savings and ease of assembly.

With continued reference to fig. 3 to 6, the chain saw further includes a lower hand guard 700, the lower hand guard 700 is connected below the holding portion 102, and two ends of the lower hand guard 700 are respectively connected with front and rear ends of the holding portion 102, so as to form an annular space, and a user can place fingers in the annular space when holding the holding portion 102 of the chain saw, so as to play a role in protecting the fingers, so as to prevent the user from being injured after the saw chain is broken. In addition, the chain saw is provided with the lower hand guard 700, so that the chain saw can be stored conveniently, for example, the lower hand guard 700 can be hooked on a branch or a hook, and a user can use other works conveniently by hands.

In some embodiments, the thickness of the lower hand guard 700 is greater than or equal to 5mm and less than or equal to 20mm, for example, the thickness of the lower hand guard 700 may be 5mm, 7mm, 10mm, 12mm, 15mm, 19mm, or 20mm.

To facilitate maintenance and replacement of the lower hand guard 700, in some embodiments, as shown in fig. 4-6, the lower hand guard 700 is removably coupled to the grip 102. Specifically, two ends of the lower hand guard 700 are respectively provided with a limiting hole 710, the housing 100 is provided with a limiting post 910, and the lower hand guard 700 and the holding part 102 are detachably connected by inserting the limiting holes 710 into the limiting posts 910, which can also be achieved in a clamping manner except for the method. With continued reference to fig. 5-7, the chain saw further includes a switch lock 900, the switch lock 900 being movably disposed on the housing 100 by an elastic member, and a limit post 910 protruding on the switch lock 900.

It should be noted that, according to the safety requirements set for the chain saw abroad, the lower hand guard 700 must be set on the chain saw, but the domestic requirement for the lower hand guard 700 does not have to be set for the chain saw, and many domestic users do not get used to the existence of the lower hand guard 700 when using the chain saw, the lower hand guard 700 is detachably connected with the holding part 102, and the lower hand guard 700 can be disassembled and assembled according to the use habit and the geographical use position of the users, so as to meet the use requirements of the users.

In some embodiments, the oilcan 610 is at least partially disposed or formed within the lower hand guard 700. This chain saw is through placing oilcan 610 in hand protector 700 down, can make full use of hand protector 700 inside space down, not only does benefit to the size of reducing the main part of chain saw, realizes the miniaturization of chain saw, and can improve user's use experience. It should be noted that, if the oil can 610 is disposed or formed in the lower hand guard 700, the lower hand guard 700 is preferably fixedly connected to the grip portion 102, so as to avoid the occurrence of oil leakage due to poor tightness caused by detachable connection.

In some embodiments, the oil can 610 has a fuel filler port disposed on the upper surface of the lower hand guard 700 to facilitate filling the interior of the oil can 610.

In some embodiments, the lower hand guard 700 and the oilcan 610 share one housing, that is, at least part of the housing of the lower hand guard 700 forms an oilcan housing of the oilcan 610, and a containing space for containing lubricating oil is formed in the lower hand guard 700, so that the space inside the lower hand guard 700 can be fully utilized, and the oil content inside the lower hand guard 700 can be increased. In some other embodiments, the oilcan 610 includes a separate oilcan housing that is connected to the inner wall surface of the outer housing of the lower hand guard 700.

In some embodiments, the oil pump 620 is disposed within the lower hand guard 700. This further makes full use of the space inside the lower hand guard 700, thereby further reducing the size of the main body portion of the chain saw.

With continued reference to fig. 3, in addition to the oil pump 620 being provided in the lower hand guard 700, the oil pump 620 may be provided in the grip portion 102, so that the space inside the grip portion 102 may be further fully utilized.

In some embodiments, the oil pump 620 is disposed in a middle position of the grip 102, and the oil suction pipe 630 extends from front to back into the lower hand guard 700. In some other embodiments, the oil pump 620 is disposed in a middle position of the grip 102, and the oil suction pipe 630 extends from the rear to the front into the lower hand guard 700.

In order to improve the working environment of the chain saw, an illumination mechanism is provided on the upper shield 800 of the cutting assembly 200, and a cutting area is illuminated by the illumination mechanism, so that a user can clearly acquire a cutting progress and control a cutting direction, thereby improving cutting quality.

In some embodiments, the upper shield 800 is a transparent cover made of a transparent material. The outer side of the upper shield 800 may be frosted or otherwise treated for the purpose of blocking light. The inner side wall of the upper shield 800 is obliquely arranged to transmit light towards the direction of the guide plate, or a light guide column is arranged in the upper shield 800 to guide the light to the upper part of the saw chain, so that the illumination intensity of the saw chain is enhanced, and the visual effect is improved.

In some embodiments, the illumination mechanism is an LED lamp, which is directly controlled by the control mechanism of the chainsaw, and which may be set to be lit in advance under the control of the control mechanism. In this embodiment, the control mechanism may be a centralized or distributed controller, for example, the controller may be a single-chip microcomputer, or may be formed by distributed multiple single-chip microcomputers, where a control program may be run in the single-chip microcomputer, so as to control the LED lamp to implement its function. It should be noted that, the control mechanism may be integrated with the circuit board 400, or may be two independent mechanisms. Of course, the lighting mechanism may employ a halogen lamp, a high-pressure sodium lamp, a low-pressure sodium lamp, or the like, in addition to the LED lamp, so as to realize lighting operation.

In some embodiments, the illumination mechanism is connected to the battery pack 500 by an electrical cord, and the battery pack 500 is used to provide electrical power to the illumination mechanism, and in some other embodiments, the chain saw may further be provided with a solar panel on an outer wall surface of the upper shield 800, and the illumination mechanism is electrically connected to the solar panel, and the solar panel is used to provide electrical power to the illumination mechanism. Of course, the solar panel may supply power to other power consuming components of the chain saw in addition to the lighting mechanism, and may even completely replace the battery pack 500 if the solar panel provides sufficient power.

In some embodiments, the wires run from one side of the upper shield 800. In some embodiments, one end of the upper shield 800 is rotatably connected to the housing 100 through a rotation shaft, and a torsion spring is sleeved on the rotation shaft, so that torsion force is provided for resetting the upper shield 800 by using the torsion spring. The portion of the wire body where the wire enters the upper shield 800 may be integrated with the torsion spring to simultaneously conduct electricity and provide torsion.

Typically, the illumination mechanism is disposed on the upper shield 800 and rotates synchronously with the upper shield 800 to facilitate maintenance and replacement of the illumination mechanism. Of course, in other embodiments, the illumination mechanism may be fixedly disposed on the housing 100 so as not to rotate synchronously with the upper shield 800. When the lighting mechanism is disposed on the housing 100, the rotating shaft rotatably connecting the upper shield 800 to the housing 100 can be made of a light guiding material, so that the rotating shaft has both the rotating connection and the light guiding function, and the upper shield 800 is made of a light guiding material, so that the upper shield 800 has both the protection and the light guiding functions. Light emitted from the illumination mechanism can enter the upper shield 800 through the rotation shaft, thereby making the upper shield 800 emit light. Of course, the lighting mechanism may also be directly disposed in the rotating shaft, and the rotating shaft is rotatably connected to the housing 100 and locked by the screw, thereby achieving the fixation and installation of the lighting mechanism.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. A chain saw, comprising:

a housing (100) formed with an accommodation space (110), the housing (100) including a grip portion (102) for a user to grip;

-a cutting assembly (200), the cutting assembly (200) comprising a saw chain for performing a cutting operation;

a motor (300) disposed within the receiving space (110), the motor (300) for powering the saw chain to perform a cutting operation;

a transmission assembly connected between the motor (300) and the cutting assembly (200), the transmission assembly being adapted to effect transmission of power;

-a lubrication assembly (600) for effecting lubrication of the saw chain;

characterized in that the chain saw further comprises:

a lower hand guard (700), the lower hand guard (700) being connected below the grip (102);

the lubrication assembly (600) includes an oilcan (610), the oilcan (610) being at least partially disposed or formed within the lower hand guard (700).

2. A chain saw as in claim 1, wherein the chain saw,

at least part of the outer shell of the lower hand guard (700) forms an oil pot shell of the oil pot (610), and a containing space for containing lubricating oil is formed in the lower hand guard (700);

alternatively, the oil can (610) comprises an oil can shell, and the oil can shell is connected with the inner wall surface of the shell of the lower hand guard (700).

3. A chain saw as in claim 1, wherein the chain saw,

the thickness of the lower hand guard (700) is more than or equal to 5mm and less than or equal to 20mm.

4. A chain saw as in claim 1, wherein the chain saw,

the lubrication assembly (600) further comprises an oil pump (620), the oil pump (620) being arranged in the lower hand guard (700).

5. A chain saw as in claim 1, wherein the chain saw,

the lubrication assembly (600) further includes an oil pump (620), the oil pump (620) being disposed within the grip (102).

6. A chain saw as in claim 5 wherein,

the lubricating assembly (600) further comprises an oil suction pipe (630), one end of the oil suction pipe (630) is communicated with an oil inlet of the oil pump (620), and the other end of the oil suction pipe (630) extends into the oil can (610).

7. A chain saw as in claim 6, wherein,

the oil pump (620) is arranged at the middle position of the holding part (102), and the oil suction pipe (630) extends into the lower hand guard (700) from front to back.

8. A chain saw as in claim 6, wherein,

the oil pump (620) is arranged at the middle position of the holding part (102), and the oil suction pipe (630) extends into the lower hand guard (700) from back to front.

9. A chain saw as in claim 5, wherein,

the lubrication assembly (600) further comprises an oil drain pipe (640), one end of the oil drain pipe (640) is communicated with an oil outlet of the oil pump (620), and the other end of the oil drain pipe (640) extends to the saw chain.

10. A chain saw as in any one of claims 1-9, wherein,

the oilcan (610) has an oil filler provided on an upper surface of the lower hand guard (700).