chain saw

Abstract

The present application relates to a chain saw, a linkage mechanism is arranged on a guard to control the pumping state of a lubricating structure. When the working head is in a working state, the cutting object pushes the guard to move away from the working head. Once the guard is pushed away, the linkage mechanism is triggered to perform corresponding actions to control the lubricating structure to deliver lubricating oil to the guide plate and / or the cutting element to ensure the stable working of the working head and effectively avoid dry grinding between the cutting element and the guide plate, which is conducive to prolonging the service life of the working head. The chain saw uses the linkage mechanism to synchronously respond to the movement of the guard, so that the lubricating structure can only pump oil when the guard is pushed away or pried open, which can effectively control the lubricating structure not to pump oil when the working head is not working or is in an idle state. In this way, the pumping action is purposeful and regular, achieving the purpose of not wasting oil and saving oil; at the same time, it is also conducive to improving the working environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric power tools, in particular to a chain saw. BACKGROUND

[0002] Among many cutting or pruning tools, chain saws are always popular with users due to their sufficient cutting power and convenient operation. A conventional chain saw usually comprises a chain and a guide plate for supporting the chain. During operation, the chain is driven by a motor to rotate around the surface of the guide plate so as to cut workpieces.

[0003] The existing chain saws, especially single-handed saws, are small in size and compact in structure, and most of them do not have a pumping mechanism, which results in dry grinding of the chain for a long time and seriously affects the service life of the chain. Therefore, some chain saws currently have a pumping structure, such as an automatic pumping structure on large chain saws, which pumps oil continuously when the motor is working by driving the pump with the motor; and some chain saws have a manual pumping structure, which has an oil tank on the machine shell and a hemisphere on the oil tank for the user to press to pump oil.

[0004] However, the chain saws with the automatic pumping structure continuously pump oil during operation, which results in excessive lubricating oil stored on the guide plate and causes the lubricating oil to overflow, waste seriously and pollute the environment. The chain saws with the manual pumping structure are prone to forgetting to take oil, forgetting to add oil or irregularly adding oil, which results in dry grinding of the chain and the guide plate and seriously shortens the service life of the guide plate, the chain and the cutting blade of the chain. SUMMARY

[0005] Therefore, it is necessary to provide a chain saw that can pump oil purposefully and regularly, achieve the purposes of not wasting oil and saving oil, and ensure stable operation of the chain saw.

[0006] A chain saw comprises a machine shell, a working head including a guide plate and a cutting element arranged on the guide plate, the guide plate being arranged in the machine shell and at least partially extending out of the machine shell, a driver arranged in the machine shell and used to drive the cutting element to rotate on the guide plate, a protective member movably arranged in the machine shell and at least partially covering the working head, and a pumping structure used to deliver lubricating oil to the guide plate and / or the cutting element. The chain saw further comprises a linkage mechanism connected with the protective member and control-matched with the pumping structure, and when the protective member moves relative to the machine shell in a direction away from and / or towards the working head, the linkage mechanism is triggered to act to control the pumping structure to deliver lubricating oil to the guide plate and / or the cutting element.

[0007] The chain saw has a linkage mechanism arranged on the guard to control the pumping state of the oil pumping structure. When the working head is in the working state, the cutting object pushes the guard to move away from the working head. Once the guard is pushed away, the linkage mechanism is triggered to perform corresponding actions to control the oil pumping structure to deliver lubricating oil to the guide plate and / or the cutting element, so as to ensure the stable working of the working head and effectively avoid dry grinding between the cutting element and the guide plate, thereby prolonging the service life of the working head. The chain saw uses the linkage mechanism to synchronously respond to the movement of the guard, so that the oil pumping structure can only pump oil when the guard is pushed away or pried open, thereby effectively controlling the oil pumping structure not to pump oil when the working head is not working or is in the idle state. In this way, the oil pumping action is purposeful and regular, thereby achieving the purpose of saving oil and improving the working environment.

[0008] In one of the embodiments, the oil pumping structure comprises a control assembly and an oil pumping body having an oil storage cavity. The oil pumping body is provided with an oil inlet channel communicated with the oil storage cavity and an oil outlet channel extended to the guide plate or the cutting element. The control assembly is in abutting contact with the linkage mechanism, and when the control assembly is pushed, the lubricating oil can be discharged from the oil outlet channel.

[0009] In one of the embodiments, the guard is pivotally connected to the machine shell through a rotating shaft. When the guard rotates relative to the machine shell away from or towards the working head, the rotating shaft drives the linkage mechanism to act to push the control assembly.

[0010] In one of the embodiments, the linkage mechanism comprises a cam connected to the rotating shaft. The cam is provided with a protruding portion in abutting contact with the control assembly.

[0011] In one of the embodiments, the protruding portion is provided with an abutting portion in abutting contact with the control assembly on the side away from the rotating shaft. The distance R between the abutting portion and the axis of the rotating shaft is equal or gradually increases during the process of the cam pushing the control assembly.

[0012] In one of the embodiments, the chain saw further comprises a partition plate pivotally connected to the machine shell. The protruding portion is in abutting contact with the control assembly through the partition plate.

[0013] In one of the embodiments, the chain saw further comprises a reset member for driving the guard to move towards the working head and return to the initial position.

[0014] In one of the embodiments, the control assembly comprises an elastic cap and a one-way valve, the elastic cap is arranged on the pump body and forms a working cavity with the pump body, the one-way valve is arranged in the working cavity, the oil inlet channel and the oil outlet channel are connected with the one-way valve, the elastic cap is in contact with the linkage mechanism, and the one-way valve is used for allowing the lubricating oil to flow from the oil inlet channel into the working cavity and from the working cavity into the oil outlet channel.

[0015] In one of the embodiments, the control assembly further comprises a pressing cap, the pressing cap is arranged on the elastic cap and presses the elastic cap on the pump body.

[0016] In one of the embodiments, the chain saw further comprises a battery pack, the housing extends to form a holding part on the side away from the working head, and the battery pack is arranged on the holding part. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the application and are incorporated herein for a purpose of explanations. The schematic embodiments of the present application and the descriptions thereof are used to explain the present application and do not constitute an improper limitation to the present application.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0019] Figure 1 The structure schematic diagram of the chain saw in one of the embodiments;

[0020] Figure 2 The structure schematic diagram of the chain saw in one of the embodiments; Figure 1 The structure schematic diagram of the chain saw in one of the embodiments;

[0021] Figure 3 The structure schematic diagram of the chain saw in one of the embodiments;

[0022] Figure 4 The structure schematic diagram of the chain saw in one of the embodiments;

[0023] Figure 5 The structure schematic diagram of the chain saw in one of the embodiments;

[0024] 100, chain saw; 110, housing; 111, holding portion; 112, supporting portion; 113, positioning column; 120, working head; 121, guide plate; 122, cutting element; 130, driver; 140, guard; 141, rotating shaft; 142, return element; 150, oil pumping structure; 151, oil pumping body; 1511, oil storage cavity; 152, oil inlet pipe; 1521, oil inlet channel; 153, oil outlet pipe; 1531, oil outlet channel; 154, control assembly; 1541, elastic cap; 1542, working cavity; 1543, one-way valve; 1544, gland; 155, sealing sleeve; 156, oil inlet nozzle; 160, linkage mechanism; 161, cam; 1611, protruding portion; 1612, abutting portion; 170, partition; 171, shaft hole; 180, transmission structure; 190, battery pack; 200, object to be cut. DETAILED DESCRIPTION

[0025] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0026] In one embodiment, please refer to Figures 1 to 3 A chain saw 100, the chain saw 100 comprising: a housing 110; a working head 120 comprising a guide plate 121 and a cutting element 122 wound on the guide plate 121, the guide plate 121 being arranged in the housing 110 and at least a part extending out of the housing 110; a driver 130 arranged in the housing 110 for driving the cutting element 122 to rotate on the guide plate 121; a guard 140 movably arranged in the housing 110 and at least partially covering the working head 120; an oil pumping structure 150 for delivering lubricating oil to the guide plate 121 and / or the cutting element 122; the chain saw 100 further comprising a linkage mechanism 160 connected with the guard 140 and control-matched with the oil pumping structure 150, when the guard 140 moves relative to the housing 110 along a direction away from and / or towards the working head 120, triggering the linkage mechanism 160 to act to control the oil pumping structure 150 to deliver lubricating oil to the guide plate 121 and / or the cutting element 122.

[0027] The chain saw 100 has a linkage mechanism 160 arranged on the guard 140 to control the pumping state of the oil pumping structure 150. For the purpose of understanding the oil pumping principle of the chain saw 100, the cutting process is taken as an example to be described. When the working head 120 is in the working state, the cut object 200 pushes away the guard 140 to move away from the working head 120. Once the guard 140 is pushed away, the linkage mechanism 160 is triggered to perform corresponding actions to control the oil pumping structure 150 to deliver lubricating oil to the guide plate 121 and / or the cutting element 122 to ensure the stable working of the working head 120 and effectively avoid dry grinding between the cutting element 122 and the guide plate 121, which is conducive to prolonging the service life of the working head 120. The chain saw 100 synchronously responds to the movement of the guard 140 by using the linkage mechanism 160, so that the oil pumping structure 150 can only pump oil when the guard 140 is pushed away or pried open, which can effectively control the oil pumping of the working head 120 when it is not working or is in the idle state. In this way, the oil pumping action is purposeful and regular, which realizes the purpose of saving oil and improving the working environment.

[0028] It should be noted that there are various ways of pumping oil of the oil pumping structure 150, such as electric or pneumatic oil pumping, using a press pump head or using a rubber film to pump oil, etc. When the oil pumping structure 150 adopts electric or pneumatic oil pumping, the linkage mechanism 160 can be designed as a lever, a pressing block or the like to mechanically open the control switch on the oil pumping structure 150. Of course, the linkage mechanism 160 can also be designed as a sensing module, such as a Hall sensor, to sense the movement of the guard 140 to electrically control the start of the oil pumping structure 150. When the oil pumping structure 150 adopts a press pump head or a rubber cap, the linkage mechanism 160 also has various structural designs, such as a pressing block, a crank slider mechanism, a gear and rack combination structure, etc.

[0029] It should be further noted that the movement of the guard 140 on the machine shell 110 can be understood as at least rotation and up-down movement. When the movement of the guard 140 on the machine shell 110 is up-down movement, the cut object 200 pushes away the guard 140 to move away from the working head 120 relative to the machine shell 110, which drives the linkage mechanism 160 to act to realize the oil pumping of the oil pumping structure 150 to the guide plate 121 and / or the cutting element 122. The cut object 200 can be but is not limited to wood, rubber blocks, plastic blocks, etc. The cutting element 122 is a chain.

[0030] The triggering of the linkage mechanism 160 to act when the guard 140 moves away from and / or towards the working head 120 should be understood as: the triggering of the linkage mechanism 160 to act when the guard 140 moves away from the working head 120; or the triggering of the linkage mechanism 160 to act when the guard 140 moves towards the working head 120; or the triggering of the linkage mechanism 160 to act when the guard 140 reciprocates away from and then towards the working head 120; or the triggering of the linkage mechanism 160 to act when the guard 140 reciprocates towards and then away from the working head 120; and the like. Therefore, the present embodiment does not specifically limit the manner in which the guard 140 triggers the linkage mechanism 160 to act, as long as the linkage mechanism 160 can be triggered to act.

[0031] In addition, the movement of the guard 140 can come not only from being pushed away by the cut object 200, but also from being actively operated by the user. For example, when the working head 120 in an unloaded state needs to be pre-lubricated or maintained manually, the user can manually bend or press the guard 140 to move away from or towards the working head 120, so as to synchronously trigger the linkage mechanism 160 to act, and thus the oil pumping structure 150 can be more purposeful and targeted in pumping oil.

[0032] Further, please refer to Figure 3 and Figure 4 The oil pumping structure 150 includes a control assembly 154 and an oil pumping body 151 having an oil storage cavity 1511. The oil pumping body 151 is provided with an oil inlet channel 1521 in communication with the oil storage cavity 1511, and an oil outlet channel 1531 extending to the guide plate 121 or the cutting element 122. The control assembly 154 is in abutting engagement with the linkage mechanism 160, and when the control assembly 154 is pushed, the lubricating oil can be controlled to be discharged from the oil outlet channel 1531. Therefore, the oil pumping manner of the oil pumping structure 150 of the present embodiment is a pushing manner, such as using a press pump head or a rubber cap structure. When the working head 120 is in a working state, the cut object 200 pushes the guard 140 away, which synchronously triggers the linkage mechanism 160 to act, so that the linkage mechanism 160 pushes the oil pumping structure 150, and thus the oil pumping structure 150 delivers lubricating oil to the guide plate 121 and / or the cutting element 122, thereby ensuring the stable operation of the chain saw 100.

[0033] It should be noted that the forming manner of the oil inlet channel 1521 and the oil outlet channel 1531 on the oil pumping body 151 can be directly machined on the oil pumping body 151, or can be connected by pipelines. When the oil inlet channel 1521 and the oil outlet channel 1531 are both directly machined, holes or grooves are drilled or dug on the oil pumping body 151, so that two channel structures are formed around the oil storage cavity 1511. When the oil inlet channel 1521 and the oil outlet channel 1531 are both connected by pipelines, one pipeline extends into the oil storage cavity 1511, and the other pipeline extends to the guide plate 121 or the cutting element 122.

[0034] Specifically, referring to Figure 4 , the oil pumping structure 150 further comprises an oil inlet pipe 152 and an oil outlet pipe 153. The oil inlet pipe 152 and the oil outlet pipe 153 are connected with the control assembly 154. An oil inlet channel 1521 is formed in the oil inlet pipe 152, and an oil outlet channel 1531 is formed in the oil outlet pipe 153. The oil inlet pipe 152 extends to the oil storage cavity 1511 away from the control assembly 154, so as to realize the communication between the oil inlet channel 1521 and the oil storage tank. The oil outlet pipe 153 extends to the guide plate 121 or the cutting element 122 away from the control assembly 154, so as to supply oil to the guide plate 121 and / or the cutting element 122.

[0035] In addition, referring to Figure 4 , in order to facilitate the lubricating oil in the oil storage cavity 1511 to enter the oil inlet channel 1521, an oil inlet nozzle 156 is connected to one end of the oil inlet pipe 152, so that the one end of the oil inlet pipe 152 can sink to the bottom of the oil storage cavity 1511. At the same time, a sealing sleeve 155 is sleeved on the oil inlet pipe 152, and the sealing sleeve 155 is embedded on the cavity wall of the oil storage cavity 1511, so as to improve the sealing between the oil inlet pipe 152 and the oil pumping body 151, and avoid oil leakage.

[0036] In one embodiment, referring to Figure 3 and Figure 5 , the protective piece 140 is pivoted in the casing 110 through the rotating shaft 141, that is, the movement of the protective piece 140 on the casing 110 is rotation. When the protective piece 140 rotates away from or towards the working head 120 relative to the casing 110, the linkage mechanism 160 is driven to act through the rotating shaft 141 to push the control assembly 154. At this time, the control assembly 154 is pressed, and controls the lubricating oil to be discharged from the oil outlet channel 1531, so that the guide plate 121 and / or the cutting element 122 are effectively lubricated.

[0037] Further, referring to Figure 3 and Figure 5 , the linkage mechanism 160 comprises a cam 161 connected to the rotating shaft 141. The cam 161 is provided with a protruding portion 1611 which is in abutting cooperation with the control assembly 154. As can be seen, when the protective piece 140 is pushed away by the cut object 200 to rotate, the rotating shaft 141 synchronously drives the cam 161 to rotate. After the cam 161 rotates, the protruding portion 1611 thereof abuts and cooperates with the control assembly 154 to push the control assembly 154, control the lubricating oil to be discharged from the oil outlet channel 1531, and realize oil pumping. In this embodiment, the linkage mechanism 160 is designed as a cam 161 structure, which not only ensures the stable force transmission between the protective piece 140 and the control assembly 154, but also simplifies the internal structure of the chain saw 100, which is conducive to the miniaturization and light weight of the product.

[0038] It should be noted that the "interference fit" should be understood as: direct interference fit and indirect interference fit. Direct interference fit is that when the cam 161 rotates to a certain position, the protruding part 1611 directly interferes with the control assembly 154. And indirect interference fit is that there is an intermediate structure between the protruding part 1611 and the control assembly 154, and the pushing force on the protruding part 1611 is transmitted to the control assembly 154 by the intermediate structure.

[0039] In other embodiments, the linkage mechanism 160 can also be designed as a seesaw structure, a gear and rack combination structure, a crank slider mechanism, etc. For example: when the linkage mechanism 160 is designed as a seesaw structure, one end of the seesaw abuts against the protective piece 140, and the other end abuts against the control assembly 154. When the linkage mechanism 160 is designed as a gear and rack combination structure, the gear is connected to the rotating shaft 141, the rack is engaged with the gear, and the control assembly 154 is in interference fit, etc.

[0040] In one embodiment, please refer to Figure 3 The side of the protruding part 1611 away from the rotating shaft 141 is provided with an interference part 1612 interfering with the control assembly 154. The distance R between the interference part 1612 and the axis of the rotating shaft 141 is equal or gradually increases during the process of the cam 161 pushing the control assembly 154, that is, the interference part 1612 can be a cylindrical surface or an involute surface relative to the axis of the rotating shaft 141. When the distance R between the interference part 1612 and the axis of the rotating shaft 141 remains consistent along the pushing direction, the cam 161 will not continue to increase the pushing force on the control assembly 154 as the protective piece 140 rotates, so that the pumping amount of the pumping structure 150 remains constant each time. When the distance R between the interference part 1612 and the axis of the rotating shaft 141 gradually increases during the process of the cam 161 pushing the control assembly 154, the cam 161 will gradually increase the pushing force on the control assembly 154, so that the pumping structure 150 continues to pump as the cutting depth of the working head 120 increases, so that the working head 120 can be effectively lubricated throughout the cutting process.

[0041] In one embodiment, please refer to Figure 3The chain saw 100 further comprises a partition plate 170. The partition plate 170 is pivotally connected in the casing 110. The protrusion 1611 abuts against the control assembly 154 through the partition plate 170. Since the cam 161 is in a rotating state when pushing the control assembly 154, the friction to the control assembly 154 is increased, which affects the service life of the oil pumping structure 150. Therefore, the partition plate 170 is added between the cam 161 and the control assembly 154 in the embodiment, and the cam 161 indirectly abuts against the control assembly 154 through the partition plate 170, which not only ensures that the control assembly 154 can be pushed by sufficient force, but also avoids direct friction with the control assembly 154, thereby prolonging the service life of the control assembly 154. In addition, the partition plate 170 is pivotally connected in the casing 110, and is in a movable state, so that the partition plate 170 can move downward with the control assembly 154 and rebound, and the upward force of the cam 161 can be better transmitted to the control assembly 154.

[0042] Further, please refer to Figure 2 The inner wall of the casing 110 is provided with a positioning column 113, and the partition plate 170 is provided with an axle hole 171. The partition plate 170 is sleeved on the positioning column 113 through the axle hole 171, so as to complete the pivotal connection between the partition plate 170 and the casing 110.

[0043] In an embodiment, please refer to Figure 2 The chain saw 100 further comprises a reset member 142. The reset member 142 is used to drive the guard 140 to move in a direction towards the working head 120 and restore to an initial position. When the guard 140 loses the pushing force of the cutting member, the reset member 142 drives the guard 140 to rotate in the opposite direction (i.e. in a direction towards the working head 120), so as to restore the guard 140 to the initial position and cover the working head 120, thereby providing effective protection for the working head 120 which is not working or is in an idle state. At the same time, it is also convenient for the next cutting to push away the guard 140 and prepare for the next cutting.

[0044] Optionally, the reset member 142 can be but is not limited to a spring, a torsion spring, an elastic rubber, an elastic metal sheet and the like.

[0045] In an embodiment, please refer to Figure 4 The control assembly 154 comprises an elastic cap 1541 and a one-way valve 1543. The elastic cap 1541 covers the oil pumping body 151 and forms a working cavity 1542 between the elastic cap 1541 and the oil pumping body 151. The one-way valve 1543 is located in the working cavity 1542. The oil inlet channel 1521 and the oil outlet channel 1531 are connected with the one-way valve 1543. The elastic cap 1541 abuts against the linkage mechanism 160. The one-way valve 1543 is used to allow the lubricating oil to flow from the oil inlet channel 1521 into the working cavity 1542 and from the working cavity 1542 into the oil outlet channel 1531 in a one-way manner. Therefore, the oil pumping structure 150 of the embodiment is an extrusion type oil pumping structure 150. Please refer to Figure 5When the linkage mechanism 160 abuts against the elastic cap 1541, the elastic cap 1541 is deformed under force and compresses the space of the working cavity 1542. Since the one-way valve 1543 is arranged between the oil inlet channel 1521, the oil outlet channel 1531 and the working cavity 1542, after the working cavity 1542 is compressed, the lubricating oil inside the working cavity 1542 can only flow into the oil outlet channel 1531 in one direction under the control of the one-way valve 1543, and is delivered to the guide plate 121 and / or the cutting element 122 by the oil outlet channel 1531 to complete one oil pumping. In addition, please refer to Figure 3 When the working head 120 is in an empty load or non-working state, the elastic cap 1541 loses the pressure of the linkage mechanism 160 and restores to the initial shape by its own elastic function to increase the space inside the working cavity 1542. Since the one-way valve 1543 only allows the lubricating oil to flow into the working cavity 1542 from the oil inlet channel 1521 in one direction, the lubricating oil in the oil storage cavity 1511 will enter the working cavity 1542 along the oil inlet channel 1521 to prepare for the next oil pumping.

[0046] It should be noted that the elastic cap 1541 has elastic compression and recovery functions, can be compressed and deformed under pressure, and can be elastically restored to the original state without pressure. The material of the elastic cap 1541 has various choices, as long as it can be elastically compressed and recovered, for example, the elastic cap 1541 is a rubber cap.

[0047] Further, please refer to Figure 4 The control assembly 154 further includes a gland 1544. The gland 1544 is sleeved on the elastic cap 1541 and presses the elastic cap 1541 tightly on the oil pumping body 151, so that the elastic cap 1541 is tightly compressed on the oil pumping body 151 by the gland 1544, the air tightness in the working cavity 1542 is improved, and the air leakage or oil leakage phenomenon is avoided.

[0048] In one embodiment, the chain saw 100 further comprises a control module and a locking module. The control module is connected with the locking module. The locking module is locked with the guard 140 to limit the movement of the guard 140 relative to the casing 110. When the working head 120 is in the working state, the control module controls the locking module to be unlocked. Therefore, when the working head 120 is in the non-working state, the locking module locks the guard 140, avoiding the movement of the guard 140 relative to the casing 110. At this time, the guard 140 cannot trigger the linkage mechanism 160 to move synchronously, that is, the oil pumping operation cannot be realized, so as to avoid the oil pumping structure 150 pumping oil due to the misoperation of the guard 140 during the carrying process. When the working head 120 is in the working state, the control module controls the locking module to be unlocked relative to the guard 140. At this time, the guard 140 is in a free state, and the cut object 200 can push the guard 140 away, so that the guard 140 moves relative to the casing 110 and synchronously triggers the linkage mechanism 160 to move, ensuring that the oil pumping structure 150 pumps oil when the working head 120 is in the working state.

[0049] It should be noted that the locking between the locking module and the guard 140 can be in the form of a latch, magnetic attraction, clamping, etc. For example, the locking module adopts a combination structure of a motor and a screw rod, controls the motor to drive the screw rod to be inserted into the pin hole on the guard 140 to realize locking, or the locking module adopts a relay device, and after being powered on, the guard 140 is tightly attracted to realize locking, etc. At the same time, the control module can be but is not limited to a single-chip microcomputer, an editable logic controller, an electronic control unit, etc.

[0050] In one embodiment, please refer to Figure 3 The chain saw 100 further comprises a battery pack 190. The battery pack 190 is arranged on the casing 110, and the battery pack 190 is electrically connected with the driver 130 to facilitate the power supply to the driver 130 and ensure the stable operation of the chain saw 100.

[0051] In another embodiment, the chain saw 100 can also not be provided with the battery pack 190, and in the working process, the chain saw 100 can be powered by being plugged into an external power source through a wire.

[0052] Further, please refer to Figure 1 The casing 110 extends to form a holding portion 111 on the side away from the working head 120. The battery pack 190 is arranged on the holding portion 111, so that the operator can hold the product conveniently and the convenience of product use is improved. In addition, the casing 110 is protruded to form a supporting portion 112, so as to support the whole weight of the product during the working process, save labor, and facilitate use.

[0053] In one embodiment, please refer to Figure 3The chain saw 100 further comprises a transmission structure 180. The transmission structure 180 is connected between the driver 130 and the cutting element 122, and is used to drive the cutting element 122 to rotate on the guide plate 121, so as to ensure stable operation of the cutting element 122.

[0054] It should be noted that the transmission structure 180 can be designed in a wheel shape or a gear shape, so as to drive the cutting element 122 to rotate. Since the transmission structure 180 is not the object to be improved in the present embodiment, the specific structure thereof can be directly referred to the existing documents and products, and will not be described in detail herein.

[0055] The technical features of the above-described embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not contradict, they should be considered as the scope of the present disclosure.

[0056] The above-described embodiments only express several implementation manners of the present disclosure, and the description is relatively specific and detailed, however, it should not be understood as a limitation on the scope of the patent. It should be noted that, for those skilled in the art, some modifications and improvements can be made without departing from the concept of the present disclosure, and these are within the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure should be subject to the appended claims.

[0057] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present disclosure and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0058] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0059] In the present application, unless specifically defined otherwise, the terms "mounting", "connected", "connecting", "fixed", and "fixing" should be construed as broad terms, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0060] In the present application, unless specifically defined otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0061] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

Claims

1. A chain saw, comprising: a housing; a working head including a guide plate and a cutting element arranged on the guide plate, the guide plate being arranged in the housing and at least a part of the guide plate extending out of the housing; a driver arranged in the housing for driving the cutting element to rotate on the guide plate; a guard movably arranged in the housing and at least partially covering the working head; a pumping structure for delivering lubricating oil to the guide plate and / or the cutting element; characterized in that the chain saw further comprises a linkage mechanism connected with the guard and in control cooperation with the pumping structure, when the guard moves relative to the housing in a direction away from and / or towards the working head, the linkage mechanism is triggered to act to control the pumping structure to deliver lubricating oil to the guide plate and / or the cutting element.

2. The chain saw of claim 1, wherein the pumping structure comprises a control assembly and a pumping body having a storage cavity, the pumping body is provided with an oil inlet channel in communication with the storage cavity and an oil outlet channel extending to the guide plate or the cutting element, the control assembly is in abutting cooperation with the linkage mechanism, and when the control assembly is pushed, the lubricating oil can be discharged from the oil outlet channel.

3. The chain saw of claim 2, wherein the guard is pivotally connected to the housing by a pivot shaft, when the guard rotates relative to the housing in a direction away from or towards the working head, the pivot shaft drives the linkage mechanism to act to push the control assembly.

4. The chain saw of claim 3, wherein the linkage mechanism comprises a cam connected to the pivot shaft, the cam is provided with a protruding portion, and the protruding portion is in abutting cooperation with the control assembly.

5. The chain saw of claim 4, wherein a side of the protruding portion away from the pivot shaft is provided with an abutting portion in abutting cooperation with the control assembly, and a distance R between the abutting portion and an axis of the pivot shaft is equal or gradually increases during the process that the cam pushes the control assembly.

6. The chain saw of claim 4, wherein the chain saw further comprises a partition plate pivotally connected to the housing, and the protruding portion is in abutting cooperation with the control assembly through the partition plate.

7. The chain saw of claim 1, wherein the chain saw further comprises a reset member for driving the guard to move in a direction towards the working head and return to an initial position.

8. The chain saw of claim 2, wherein the control assembly comprises an elastic cap and a one-way valve, the elastic cap is arranged on the pumping body and forms a working cavity with the pumping body, the one-way valve is located in the working cavity, the oil inlet channel and the oil outlet channel are connected with the one-way valve, the elastic cap is in abutting cooperation with the linkage mechanism, and the one-way valve is used to allow the lubricating oil to flow from the oil inlet channel into the working cavity and from the working cavity into the oil outlet channel in a one-way manner.

9. The chain saw of claim 8, wherein, the control assembly further comprises a gland, the gland is sleeved on the elastic cap and presses the elastic cap tightly on the pumping body.

10. The chain saw of any of claims 1-9, wherein, the chain saw further comprises a battery pack, a side of the housing away from the working head extends to form a holding portion, and the battery pack is arranged on the holding portion.

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