Chain saw

Abstract

The utility model relates to a chain saw. The chainsaw comprises: a housing to which a support bolt is fixed; the side cover assembly covers at least part of the shell, and a tool unit is kept between the side cover assembly and the shell; the side cover assembly comprises a cover shell with an opening; the adjusting unit is rotatably connected to the housing and is provided with a first driving piece and an eccentric block for driving the tool unit to move; the fixing and holding unit is rotatably connected to the housing and is provided with a second driving piece and a nut which is operably connected with the supporting bolt in a fastening manner; and the operation unit is selectively connected with one of the first driving piece and the second driving piece. Through operation of the operation unit, chain tensioning and guide plate fixing can be conveniently achieved.

Description

Technical Field

[0001] This application relates to the field of handheld tool technology, and in particular to a chainsaw. Background Technology

[0002] With the development of handheld tool technology, chainsaw technology has emerged. When using a chainsaw, the saw chain needs to be installed on the guide plate of the chainsaw, and the saw chain needs to be tensioned and the guide plate needs to be fixed to the chainsaw. Therefore, a chain tensioning mechanism and a guide plate locking mechanism are required.

[0003] In traditional technology, the chain tensioning on the chain guard uses worm gear technology. Although it can reduce the size of the tensioning mechanism, the large reduction ratio makes it inconvenient to drive directly and usually requires the use of auxiliary tools. The guide plate locking mechanism of the chain guard usually adopts a bolt and nut structure. In order to securely and stably fasten the guide plate to the chainsaw, auxiliary tools are needed to tighten the nut.

[0004] However, current chain tensioning devices and guide plate fastening devices all require auxiliary tools for operation, which is inconvenient for users and tools to store. Therefore, this utility model improves upon the aforementioned shortcomings of chain covers. Utility Model Content

[0005] Therefore, it is necessary to provide a chainsaw to address the inconvenience of chain tensioning and guide plate fastening.

[0006] To solve the above-mentioned technical problems, this application is implemented as follows:

[0007] In one embodiment, a chainsaw is provided, comprising: a housing fixed with support bolts; a side cover assembly covering at least a portion of the housing, wherein a tool unit is held between the side cover assembly and the housing;

[0008] The side cover assembly includes: a cover having an opening through which the support bolt passes;

[0009] An adjustment unit is rotatably connected to the housing and has a first driving member and an eccentric block that drives the tool unit to move. The first driving member is drivingly connected to the eccentric block.

[0010] A holding unit, rotatably connected to the housing, has a second drive member and a nut operably fastened to the support bolt, the second drive member being drivenly connected to the nut; an operating unit, selectively connected to either the first drive member or the second drive member.

[0011] Optionally, the operating unit includes a rotary button and a switching component. The rotary button rotates about the axis of the support bolt, and the switching component is movably connected to the rotary button. The switching component has a first state connected to the first driving component and a second state connected to the second driving component.

[0012] Optionally, the switching element moves radially along the rotary button, the first state of the switching element is configured as a first position off-axis, and the second state of the switching element is configured as a second position off-axis.

[0013] Optionally, the switching component further includes a positioning part that protrudes radially, and the cover further includes a positioning groove in which the positioning part is disposed to restrict the relative rotation between the switching component and the cover.

[0014] Optionally, the switching member further has a third state in which the positioning part is inserted into the positioning slot. The third state of the switching member is configured as a third position on the movement path of the switching member, and the third position is different from the first position and the second position. When the switching member is in the third position, the switching member is connected to the first driving member and / or the second driving member.

[0015] Optionally, multiple positioning grooves are provided and are evenly arranged around the periphery of the rotary button.

[0016] Optionally, the first driving member and the eccentric block are fixedly connected. The end of the first driving member away from the eccentric block is provided with an annular flange. The side of the annular flange away from the eccentric block is provided with a first engaging portion. The switching member is provided with a first connecting portion that engages with the first engaging portion on the side facing the first driving member.

[0017] Optionally, the switching member includes a receiving portion, the receiving portion including a first recess and a second recess that are interconnected. When the switching member is in the first position, the first driving member is at least partially received in the first recess, and the first recess restricts the relative rotation of the first driving member. When the switching member is in the second position, the second driving member is at least partially received in the second recess, and the second recess releases the relative rotation of the first driving member.

[0018] Optionally, the receiving portion further includes a third recess, the first recess, the second recess and the third recess are connected, the switching member further includes a positioning portion, the positioning portion is radially protruding, the cover further includes a positioning groove, the switching member also has a third state in which the positioning portion is inserted into the positioning groove, the third state of the switching member is configured as a third position on the movement path of the switching member, when the switching member is in the third position, the first driving member is at least partially received in the third recess, and the third recess restricts the relative rotation of the first driving member.

[0019] Optionally, the retaining unit further includes an elastic element disposed between the second driving member and the nut, wherein the second driving member is at least partially accommodated in the accommodating portion and biased by the elastic element; a limiting portion is provided on the side of the second driving member facing the nut, and the limiting portion circumferentially fixes the nut.

[0020] In this embodiment of the application, by operating the switching component, one of the adjustment unit and the holding unit is selectively connected, so that the operating unit can selectively perform the function of chain tensioning or guide plate fastening under the operation of the operator, which is convenient for the operator to use. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a chainsaw in one embodiment of this application;

[0022] Figure 2 This is a partial exploded view of a chainsaw in one embodiment of this application;

[0023] Figure 3 This is an exploded view of the side shield assembly in one embodiment of this application;

[0024] Figure 4 This is an exploded view of the side shield assembly in one embodiment of this application from another perspective;

[0025] Figure 5 This is a schematic diagram of the structure of the switching component of the side cover assembly in the third position according to one embodiment of this application;

[0026] Figure 6 This is a cross-sectional view of the switching element of the side cover assembly in the third position according to an embodiment of this application;

[0027] Figure 7 This is a schematic diagram of the structure of the switching component of the side cover assembly in the first position according to an embodiment of this application;

[0028] Figure 8 This is a cross-sectional view of the switching element of the side cover assembly in a first position according to an embodiment of this application;

[0029] Figure 9 This is a schematic diagram of the structure of the switching component of the side cover assembly in the second position according to an embodiment of this application;

[0030] Figure 10 This is a cross-sectional view of the switching element of the side cover assembly in the second position according to an embodiment of this application. Detailed Implementation

[0031] To make the above-mentioned objects, features, and advantages of this application more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the invention. However, the invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0032] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0037] See Figure 1 and Figure 2 Figure 1 shows a three-dimensional structural schematic diagram of a chainsaw according to an embodiment of the present application, and Figure 2 shows a partial exploded schematic diagram of a chainsaw according to an embodiment of the present application. The chainsaw provided in an embodiment of the present application includes a housing 1 and a side cover assembly 2. A support bolt 11 is fixed on the housing 1 and the support bolt 11 is fixed on the side of the housing 1, especially the right side. The side cover assembly 2 covers at least part of the housing 1 and is connected to the support bolt 11. A tool unit 3 is also provided between the side cover assembly 2 and the housing 1 and is held between the side cover assembly 2 and the housing 1.

[0038] See Figure 3 and Figure 4 Figure 3 shows an exploded view of the side cover assembly according to one embodiment of this application, and Figure 4 shows an exploded view of the side cover assembly according to another perspective according to one embodiment of this application. The side cover assembly 2 includes a housing 21, an adjustment unit 22, a holding unit 23, and an operating unit 24. The operating unit 24 is disposed outside the adjustment unit 22 and the holding unit 23. The housing 21 has an opening 211 through which a support bolt 11 can pass. The adjustment unit 22 can be operated to drive the tool unit 3 to move. The holding unit 23 can be operated to apply a force to the tool unit 3 in the direction toward the housing 1, so that the operating unit 24 can be operated to selectively connect to the adjustment unit 22 and / or the holding unit 23.

[0039] In one or more preferred embodiments, the adjustment unit 22 at least partially passes through the opening 211 and is rotatably connected to the housing 21. The adjustment unit 22 includes a first drive member 221 and an eccentric block 222. The radial distance of the outer periphery of the eccentric block 222 about the center of rotation gradually increases. The eccentric block 222 is located on the side of the housing 21 closer to the tool unit 3, and the outer periphery of the eccentric block 222 abuts against the tool unit 3. The first drive member 221 is located on the side of the housing 21 away from the tool unit 3. The first drive member 221 and the eccentric block 211 are driven to rotate. Preferably, the first drive member 221 drives the eccentric block 222 to rotate, and the tool unit 3 abutting against the outer periphery of the eccentric block 222 is deflected as the eccentric block 222 rotates. Preferably, the first drive member 221 and the eccentric block 222 are connected by fasteners, snap-fitting, or other fastening methods.

[0040] In one or more preferred embodiments, the holding unit 23 is rotatably connected to the housing 21. The holding unit 23 includes a second drive member 231 and a nut 232. The second drive member 231 and the nut 232 are drivenly connected. The nut 232 is threadedly connected to the support bolt 11. The second drive member 231 is disposed on the side of the nut 232 away from the tool unit 3. Preferably, the side of the second drive member 231 facing the nut 232 is provided with a limiting portion 2321. The limiting portion 2321 at least partially accommodates the nut 232 and circumferentially fixes the nut 232 so that the second drive member 231 drives the nut 232 to rotate. The holding unit 23 also includes an elastic member 233, which is sandwiched between the second drive member 231 and the nut 232. The second drive member 231 is biased by the elastic member 233 and abuts against the operating unit 24. Preferably, the elastic element 233 is a compression spring, a rubber element, or other elastic material or structure. The elastic element 233 is also provided with a central hole, the diameter of which is greater than or equal to the inner diameter of the support nut 11, so that the support nut 11 can be inserted.

[0041] In one or more preferred embodiments, the operating unit 24 can be selectively connected to either the first driving member 221 or the second driving member 231. The operating unit 24 includes a rotary button 241 and a switching member 242. The rotary button 241 rotates about its own axis. Preferably, the axis of the rotary button 241 is parallel to or coincides with the axis of the support bolt 11. The outer periphery of the rotary button 241 is also provided with an anti-slip portion to facilitate the operator applying force when gripping and rotating the rotary button 241. It is understood that the anti-slip portion can be an anti-slip structure with concave and convex shapes, a textured structure with anti-slip function, or a material with anti-slip effect. The switching member 242 is movably connected to the rotary button 241 and has a first state connected to the first driving member 221 and a second state connected to the second driving member 231. In this embodiment, the switching element 242 moves radially along the rotary button 241. The rotary button 241 is provided with a slide rail 2412 along the moving direction of the switching element 242, and the switching element 242 is provided with a track groove 2424 along the moving direction. The slide rail 2412 and the track groove 2424 engage to define the moving direction of the switching element 242. The first state of the switching element 242 is configured as a first position off-axis, and the second state of the switching element 242 is configured as a second position off-axis. It can be understood that, in order to satisfy the selective connection of the switching element, the first position is different from the second position. Preferably, the first position and the second position are arranged radially on both sides of the rotation center of the rotary button 241.

[0042] In one or more preferred embodiments, when the switching member 242 is in the first position or the second position, at least a portion of the switching member 242 extends beyond the outer periphery of the rotary button 241. The portion of the switching member 242 extending beyond the rotary button 241 can be used as a force lever to facilitate the application of force to the operating unit 24.

[0043] In one or more preferred embodiments, the switching member 242 further includes a positioning part 2421, which protrudes radially along the outer periphery of the switching member 242. On the periphery of the switching member 242, the cover 21 also includes a positioning groove 212. The positioning part 2421 is operably inserted into the positioning groove 212 so that the switching member 242 is restricted from rotation by the cover 21. Preferably, multiple positioning grooves 212 are provided, and the evenly spaced annular tongues are on the periphery of the rotary button 241 so that the positioning part 2421 can be inserted into the positioning groove 212.

[0044] In one or more preferred embodiments, the switching member 242 further has a third state in which the switching member 242 moves to a third position where the switching member 242 is inserted into the positioning groove 212. The third position is different from the first position and the second position. Preferably, the third position is set between the first position and the second position.

[0045] In one or more preferred embodiments, the outer surface of the switch 242 is further provided with a graphic symbol indicating the state of the switch, and the outer surface of the rotary button 241 is further provided with an indicator symbol pointing to the switch 242. When the switch 242 is in the first position, the second position and the third position, the indicator symbol points to different graphic symbols respectively.

[0046] In one or more preferred embodiments, the switching member 242 further includes a receiving portion 2423, in which the second driving member 231 is at least partially received under the bias of the elastic member 233. The receiving portion 2423 includes a first recess 24231, a second recess 24232, and a third recess 24233. Preferably, a positioning protrusion is also provided between two adjacent recesses to restrict the free movement of the second driving member 231. When the switching member 242 moves between two adjacent recesses, the elastic member 233 is compressed by force, and the second driving member 231 is limited in the recess by the positioning protrusion. The inner peripheral walls on both sides of the first recess 24231 abut against the second drive member 231 and restrict the relative rotation between the second drive member 231 and the switching member 242. The inner peripheral walls on both sides of the third recess 24233 abut against the second drive member 231 and restrict the relative rotation between the second drive member 231 and the switching member 242. The inner peripheral walls of the second recess 24231 release the relative rotation between the second drive member 231 and the switching member 242.

[0047] In one or more preferred embodiments, the first driving member 221 and the eccentric block 222 are fixedly connected, preferably by a reliable connection method such as screw fastening, snap-fit, or threaded connection. The end of the first driving member 221 away from the eccentric block 222 is provided with an annular flange 2211, and the side of the annular flange 2211 away from the eccentric block 222 is provided with a first engaging portion 2212. The switching member 242 is provided with a first connecting portion 2422 that mates with the first engaging portion 2212. When the first connecting portion 2422 and the first engaging portion 2212 are engaged, rotating the switching member 242 drives the eccentric block 222 to move the tool unit 3.

[0048] In one or more preferred embodiments, the positioning part 2421 is arranged adjacent to the first connecting part 2422 and is integrally formed with the switching member 242.

[0049] In one or more preferred embodiments, see Figure 5 and Figure 6Figure 5 shows a schematic diagram of the switching member of the side cover assembly in the third position according to an embodiment of this application, and Figure 6 shows a cross-sectional view of the switching member of the side cover assembly in the third position according to an embodiment of this application. When the switching member 242 is in the third position, the positioning part 2421 is inserted into the positioning groove 212, and the switching member 242 is circumferentially fixed by the cover 21. Preferably, the first connecting part 2422 of the switching member 242 is also at least partially engaged with the first engaging part 2212 of the first driving member 221 to restrict the movement of the adjusting unit 22 and reliably and stably abut against the tool unit 3. Preferably, the third recessed part 24233 of the switching member 242 also at least partially accommodates the second driving member 231 to restrict the movement of the holding unit 23 and reliably and stably hold the tool unit 3.

[0050] In one or more preferred embodiments, see Figure 7 and Figure 8 Figure 7 shows a schematic diagram of the switching member of the side cover assembly in the first position according to an embodiment of the present application. Figure 8 shows a cross-sectional view of the switching member of the side cover assembly in the first position according to an embodiment of the present application. When the switching member 242 is in the first position, the first connecting part 2422 of the switching member 242 is engaged with the first connecting part 2212 of the first driving member 221 to drive the rotation of the adjustment unit 22. The operating unit 24 is not connected to the holding unit 23. Preferably, the switching member 242 is not circumferentially restricted on the cover 21. Preferably, the switching member 242 extends at least partially from the periphery of the rotary button 241 so as to be used as a force lever for easy user operation.

[0051] In one or more preferred embodiments, see Figure 9 and Figure 10 Figure 9 shows a schematic diagram of the switching member of the side cover assembly in the second position according to an embodiment of the present application. Figure 10 shows a cross-sectional view of the switching member of the side cover assembly in the second position according to an embodiment of the present application. When the switching member 242 is in the second position, the second recess 24232 of the switching member 242 at least partially accommodates the second driving member 231 to drive the rotation of the holding unit 23. The operating unit 24 is not connected to the adjusting unit 22. Preferably, the switching member 242 is not circumferentially restricted on the cover 21. Preferably, the switching member 242 at least partially extends out of the periphery of the rotary button 241 so as to be used as a force lever for easy user operation.

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A chain saw, characterized in that The utility model relates to a tool unit, comprising: a housing (1) fixed with a support bolt (11); a side cover assembly (2) covering at least part of the housing (1), and a tool unit (3) being held between the side cover assembly (2) and the housing (1); the side cover assembly (2) comprises: a cover shell (21) having an opening (211) through which the support bolt (11) passes; an adjusting unit (22) rotatably connected to the cover shell (21) and having a first driving member (221) and an eccentric block (222) for driving the tool unit (3) to move, the first driving member (221) being drivingly connected to the eccentric block (222); a holding unit (23) rotatably connected to the cover shell (21) and having a second driving member (231) and a nut (232) operatively and tightly connected to the support bolt (11), the second driving member (231) being drivingly connected to the nut (232); an operating unit (24) selectively connected to one of the first driving member (221) and the second driving member (231).

2. The chain saw of claim 1, wherein The operating unit (24) comprises a rotating button (241) and a switching member (242), the rotating button (241) rotates about the axis of the support bolt (11), the switching member (242) is movably connected to the rotating button (241), and the switching member (242) has a first state connected to the first driving member (221) and a second state connected to the second driving member (231).

3. The chain saw of claim 2, wherein The switching member (242) moves along the radial direction of the rotating button (241), the first state of the switching member (242) is configured as a first position deviating from the axis, and the second state of the switching member (242) is configured as a second position deviating from the axis.

4. The chain saw of claim 3, wherein The switching member (242) further comprises a positioning portion (2421) radially protruding, and the cover shell (21) further comprises a positioning groove (212), the positioning portion (2421) is arranged in the positioning groove (212), and the relative rotation between the switching member (242) and the cover shell (21) is limited.

5. The chain saw of claim 4, wherein The switching member (242) further has a third state in which the positioning portion (2421) is inserted into the positioning groove (212), the third state of the switching member (242) is configured as a third position on the movement path of the switching member (242), and the third position is different from the first position and the second position, and the switching member (242) is connected to the first driving member (221) and / or the second driving member (231) when the switching member (242) is in the third position.

6. The chain saw of claim 4 wherein, The positioning groove (212) is provided with a plurality of positioning grooves, and the plurality of positioning grooves are uniformly arranged on the circumferential side of the rotating button (241).

7. The chain saw of claim 2 wherein, The first driving member (221) is fixedly connected with the eccentric block (222), and the first driving member (221) is provided with an annular flange (2211) at one end away from the eccentric block (222), and the annular flange (2211) is provided with a first connecting part (2212) on the side away from the eccentric block (222), and the switching member (242) is provided with the first connecting part (2422) corresponding to the first connecting part (2212) on the side facing the first driving member (221).

8. The chain saw of claim 3, wherein The switching member (242) comprises a containing part (2423), and the containing part (2423) comprises a first recess (24231) and a second recess (24232) in communication with each other; when the switching member (242) is in the first position, the first driving member (221) is at least partially contained in the first recess (24231), and the first recess (24231) limits the relative rotation of the first driving member (221); when the switching member (242) is in the second position, the second driving member (231) is at least partially contained in the second recess (24232), and the second recess (24232) releases the relative rotation of the first driving member (221).

9. The chain saw of claim 8 wherein, The containing part (2423) further comprises a third recess (24233), and the first recess (24231), the second recess (24232) and the third recess (24233) are in communication; the switching member (242) further comprises a positioning part (2421) protruding radially, and the cover shell (21) further comprises a positioning groove (212); the switching member (242) further has a third state that the positioning part (2421) is inserted into the positioning groove (212), and the third state of the switching member (242) is a third position on the movement path of the switching member (242); when the switching member (242) is in the third position, the first driving member (221) is at least partially contained in the third recess (24233), and the third recess (24233) limits the relative rotation of the first driving member (221).

10. The chain saw of claim 8 wherein, The holding unit (23) further comprises an elastic member (233), and the elastic member (233) is arranged between the second driving member (231) and the nut (232); the second driving member (231) is at least partially contained in the containing part (2423) and is biased by the elastic member (233); the second driving member (231) is provided with a limiting part (2321) on the side facing the nut (232), and the limiting part (2321) circumferentially fixes the nut (232).

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