Chain saw

Abstract

The chain saw comprises a mounting body, a guide plate, a guide wheel, a chain, a push plate, a gear, a first adjusting knob and a second adjusting knob. The flange structure of the push plate is used for abutting against the edge of the side, opposite to the guide wheel, of the guide plate. And the racks of the push plate are meshed. The first adjusting knob is sleeved and engaged with the gear. The second adjusting knob is arranged on the side, away from the guide plate, of the first adjusting knob and used for pressing the guide plate to the mounting body or relieving pressing of the guide plate on the mounting body. According to the chain saw, the guide plate is pressed on the mounting body or the pressing of the guide plate on the mounting body is relieved through the second adjusting knob, so that the chain of the chain saw can be disassembled, replaced and assembled under the condition of no tool, and the operation convenience of replacing the chain is improved; in addition, tensioning adjustment of the chain can be completed only by twisting the first adjusting knob to enable the flange structure to push the guide plate to move, and operation simplicity and convenience are improved.

Description

Technical Field

[0001] This application relates to the technical field of cutting tools, and particularly to a chain saw. Background Art

[0002] A chain saw mainly relies on the transverse movement of the staggered L-shaped blades on the chain to perform a shearing action. During the use of the chain saw, the chain will experience a certain degree of wear. When the wear of the chain reaches a certain level, the chain needs to be replaced and tensioned.

[0003] Traditional chain saws generally use a bolt fixation method to fix the chain. Therefore, special tools are required for cooperation during chain replacement and tension adjustment. However, special tools are often lacking during outdoor work. Therefore, traditional chain saws have problems with difficult chain replacement and tension adjustment. Utility Model Content

[0004] Based on this, it is necessary to provide a chain saw to address the problems of difficult chain replacement and tension adjustment in traditional chain saws.

[0005] A chain saw, comprising:

[0006] An installation body;

[0007] A guide plate;

[0008] A guide wheel, the guide plate and the guide wheel are spaced apart and arranged on the same side of the installation body;

[0009] A chain, the chain is sleeved on the guide plate and the guide wheel along the edges of the guide plate and the guide wheel;

[0010] A push plate, the push plate has a flange structure and a rack. The flange structure is used to abut against the opposite side edge of the guide plate and the guide wheel, and the rack extends along the length direction parallel to the guide plate;

[0011] A gear, the gear meshes with the rack;

[0012] A first adjustment knob, the first adjustment knob is sleeved and meshed with the gear. The first adjustment knob is used to be twisted and drive the gear to rotate. When the gear rotates, the gear drives the rack to move in a direction parallel to the length direction of the guide plate, and the flange structure pushes the guide plate to move along the length direction;

[0013] A second adjustment knob, the second adjustment knob is arranged on the side of the first adjustment knob away from the guide plate, and is used to press the guide plate against the installation body or release the pressing of the guide plate on the installation body.

[0014] When replacing the chain of the above-mentioned chainsaw, it is only necessary to press the guide plate against the installation body or release the pressing of the guide plate on the installation body through the second adjustment knob, so that the disassembly, replacement and assembly of the chainsaw chain can be completed without tools, improving the operational simplicity of chain replacement. In addition, when tensioning the chain, it is only necessary to twist the first adjustment knob, so that the flange structure pushes the guide plate to move away from the guide wheel along the above-mentioned length direction, and the tension adjustment of the chain can be completed, improving the operational simplicity of chain tensioning. Therefore, the above-mentioned chainsaw can perform simple operations without tools both when replacing the chain and adjusting the chain tension, which helps to improve the practicality and operational simplicity of the chainsaw in various scenarios.

[0015] In one embodiment, the second adjustment knob includes a rotating part and a pressing part. The pressing part is connected to one end of the rotating part. The other end of the rotating part passes through the first adjustment knob, the gear and the guide plate and is threadedly connected to the installation body. The pressing part can abut against the gear.

[0016] In one embodiment, a first installation groove is formed in the first adjustment knob along the rotation axis of the gear. The pressing part can pass through the first installation groove and abut against the gear.

[0017] In one embodiment, the chainsaw further includes an installation housing for covering the side of the gear facing away from the installation body. A second installation groove is formed in the installation housing along the rotation axis of the gear. The first adjustment knob is installed in the second installation groove and meshes with the gear.

[0018] In one embodiment, the first adjustment knob includes an engaging part. The engaging part passes through the second installation groove and meshes with the gear. A clamping groove is formed on the circumferential outer wall of the engaging part facing away from the gear for installing a clamping ring.

[0019] In one embodiment, the chainsaw further includes an abutting plate clamped between the gear and the guide plate.

[0020] In one embodiment, a positioning part is provided on the side of the abutting plate facing away from the installation body. The positioning part extends parallel to the length direction of the guide plate, and the edge of the rack facing away from the gear is in movable abutment with the positioning part.

[0021] In one embodiment, a first guide arc is provided on the edge of the guide plate in contact with the flange structure, and a second guide arc is provided on the edge of the flange structure in contact with the guide plate. The first guide arc and the second guide arc can be mutually attached.

[0022] In one embodiment, a limiting boss is provided on one side of the installation body facing the guide plate. When the flange structure pushes the guide plate to move away from the guide wheel, the flange structure can abut against the limiting boss.

[0023] In one embodiment, the limiting boss is provided with a limiting flange protruding from its surface. The limiting flange extends along the length direction of the guide plate. The guide plate is provided with a limiting guide groove extending along the length direction of the guide plate. The limiting guide groove is clamped to the limiting flange, so that the guide plate can move relative to the limiting flange along the length direction. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of a chain saw in an embodiment of the present application.

[0025] Figure 2 is Figure 1 an exploded view of the chain saw shown.

[0026] Figure 3 is Figure 1 an assembly drawing of the first adjustment knob and the installation housing in the chain saw shown.

[0027] Figure 4 is Figure 3 a partial structural schematic diagram of the exploded view shown from another perspective.

[0028] Figure 5 It is a schematic structural diagram of the first adjustment knob and the second adjustment knob of the chain saw in an embodiment.

[0029] Figure 6 is Figure 5 an exploded view of the structure shown from another perspective.

[0030] Figure 7 is Figure 1 a partial structural schematic diagram of the chain saw shown.

[0031] Description of the Reference Numerals in the Drawings

[0032] 1. Chain saw; 10. Installation body; 11. Locking nut; 12. Limit boss; 121. Limit flange; 20. Guide plate; 21. First guide arc; 22. Limit guide groove; 221. Guide opening; 222. Arc-shaped limit part; 30. Guide wheel; 40. Chain; 50. Pusher plate; 51. Flange structure; 511. Second guide arc; 52. Rack; 60. Gear; 70. First adjustment knob; 71. Engagement part; 71a. Sawtooth groove; 711. Card slot; 712. Snap ring; 72. First installation groove; 73. Annular flange; 80. Second adjustment knob; 81. Rotating part; 82. Pressing part; 90. Installation housing; 91. Second installation groove; 100. Contact plate; 110. Positioning part. Detailed implementation manners

[0033] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand 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 connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0035] In addition, if there are terms such as "first" and "second", these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if there is a term "plurality", the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0036] In this application, unless otherwise clearly defined or limited, if terms such as "installed", "connected", "linked", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In this application, unless otherwise clearly defined or limited, if there is a description such as a first feature being "on" or "under" a second feature, its meaning 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 being "above", "over", and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath", and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0039] Refer to Figure 1 , Figure 1 which shows a schematic structural view of a chainsaw 1 in an embodiment of this application.

[0040] Combined with Figure 2As shown in the figure, a chainsaw 1 provided by an embodiment of the present application includes a mounting body 10, a guide plate 20, a guide wheel 30, a chain 40, a push plate 50, a gear 60, a first adjustment knob 70, and a second adjustment knob 80. The guide plate 20 and the guide wheel 30 are spaced apart on the same side of the mounting body 10. The chain 40 is sleeved on the guide plate 20 and the guide wheel 30 along the edges of the guide plate 20 and the guide wheel 30. The push plate 50 has a flange structure 51 and a rack 52. The flange structure 51 is used to abut against the opposite side edge of the guide plate 20 and the guide wheel 30. The rack 52 extends along the length direction L1 parallel to the guide plate 20. The gear 60 meshes with the rack 52. The first adjustment knob 70 is sleeved and meshed with the gear 60. The first adjustment knob 70 is used to be twisted and drive the gear 60 to rotate. When the gear 60 rotates, the gear 60 drives the rack 52 to move in a direction parallel to the length direction L1 of the guide plate 20, and the flange structure 51 pushes the guide plate 20 to move along the length direction L1. The second adjustment knob 80 is arranged on the side of the first adjustment knob 70 away from the guide plate 20, and is used to press the guide plate 20 against the mounting body 10 or release the pressing of the guide plate 20 on the mounting body 10.

[0041] When replacing the chain 40 of the above-mentioned chainsaw 1, only by pressing the guide plate 20 against the mounting body 10 or releasing the pressing of the guide plate 20 on the mounting body 10 through the second adjustment knob 80, the disassembly, replacement and assembly of the chain 40 of the chainsaw 1 can be completed without tools, which improves the operational simplicity of replacing the chain 40. In addition, when tensioning the chain 40, only by twisting the first adjustment knob 70, the flange structure 51 is used to push the guide plate 20 to move in the direction away from the guide wheel 30 along the length direction L1, and the tension adjustment of the chain 40 can be completed, which improves the operational simplicity of tensioning the chain 40. Therefore, the above-mentioned chainsaw 1 can perform simple operations without tools both when replacing the chain 40 and when adjusting the tension of the chain 40, which helps to improve the practicability and operational simplicity of the chainsaw 1 in various scenarios.

[0042] It can be understood that the second adjustment knob 80 can be but is not limited to being connected to the mounting body 10. In this way, through the locking and squeezing action with the mounting body 10, the guide plate 20 is pressed against the mounting body 10.

[0043] Optionally, as shown in combination Figure 2 As shown in the figure, the second adjustment knob 80 can be but is not limited to including a rotating part 81 and a pressing part 82. The pressing part 82 is connected to one end of the rotating part 81. The other end of the rotating part 81 passes through the first adjustment knob 70, the gear 60 and the guide plate 20, and is threadedly connected to the mounting body 10. The pressing part 82 can abut against the gear 60.

[0044] Specifically, in this embodiment, the second adjustment knob 80 is used to be twisted so that the rotating part 81 rotates relative to the mounting body 10, so that the pressing part 82 can press against or away from the gear 60, and the gear 60 can press the guide plate 20 against the mounting body 10 or release the pressing on the mounting body 10. Further, the above-mentioned rotating part 81 passes through the first adjustment knob 70, thus realizing the function integration of the first adjustment knob 70 and the second adjustment knob 80, facilitating the simultaneous operation of chain 40 tension adjustment and guide plate 20 pressing, and further improving the simplicity of operation.

[0045] Optionally, the mounting body 10 may but is not limited to include a lock nut 11, and the rotating part 81 is implemented as a screw, and the rotating part 81 can be tightened or loosened with the lock nut 11. In some other embodiments, the mounting body 10 may also but is not limited to be provided with a threaded hole position, and the rotating part 81 is implemented as a screw, and the rotating part 81 can be tightened or loosened with the above-mentioned threaded hole position.

[0046] Optionally, in combination with Figure 5 and Figure 6 As shown, a first mounting groove 72 is provided on the first adjustment knob 70 along the rotation axis L2 of the gear 60. The pressing part 82 can pass through the first mounting groove 72 and abut against the gear 60. In this way, when the rotating part 81 of the second adjustment knob 80 is locked with the mounting body 10, the pressing part 82 can apply a pressing force to the gear 60 by pressing against the gear 60, so as to press the guide plate 20 against the mounting body 10 and restrict the movement of the guide plate 20 relative to the mounting body 10.

[0047] Optionally, referring back to Figure 2 , the chainsaw 1 may but is not limited to further include a mounting housing 90. The mounting housing 90 is used to cover the side of the gear 60 facing away from the mounting body 10. A second mounting groove 91 is provided on the mounting housing 90 along the rotation axis L2 of the gear 60, and the first adjustment knob 70 is installed in the second mounting groove 91 and meshes with the gear 60.

[0048] Specifically, in this embodiment, the setting of the second mounting groove 91 helps to position the assembly of the first adjustment knob 70 and allows the first adjustment knob 70 to be twisted, thus helping to improve the assembly simplicity of the first adjustment knob 70.

[0049] Preferably, referring back to Figure 3 and Figure 4 , the first adjustment knob 70 may but is not limited to include a meshing part 71, and a sawtooth groove 71a is provided on the meshing part 71 around its central axis. The meshing part 71 passes through the second mounting groove 91 and is sleeved and meshed with the gear 60 through the sawtooth groove 71a, and is used to drive the gear 60 to rotate.

[0050] More preferably, in combination with Figure 5 and Figure 6 As shown, the engaging portion 71 can be, but is not limited to, implemented as an annular flange 73, and the annular flange 73 is provided with a serrated groove 71a. After the gear 60 is engaged with the serrated groove 71a, the pressing portion 82 is used to simultaneously abut against the gear 60 and the annular flange 73. In this way, while pressing the gear 60 to apply a pressing force to the guide plate 20, the first adjusting knob 70 can be pressed against the mounting housing 90, thus realizing the simultaneous twisting lock of the first adjusting knob 70 and the position lock of the guide plate 20, with simple, efficient, and reliable operation.

[0051] Preferably, referring back to Figure 3 and Figure 4 , a clamping groove 711 is formed on the outer circumferential wall of the engaging portion 71 facing away from the gear 60, and the clamping groove 711 is used for installing a clamping ring 712.

[0052] Specifically, when the first adjusting knob 70 is assembled with the mounting housing 90, by installing the clamping ring 712 on the clamping groove 711, the clamping ring 712 can be abutted against the edge of the second mounting groove 91, thereby preventing the first adjusting knob 70 from detaching from the mounting housing 90 and improving the assembly stability of the first adjusting knob 70.

[0053] Referring back to Figure 2 , optionally, the chain saw 1 can be, but is not limited to, further including an abutting plate 100. The abutting plate 100 is clamped between the gear 60 and the guide plate 20. In this way, when the second adjusting knob 80 presses the guide plate 20 against the mounting body 10, it helps to increase the pressing area on the guide plate 20, thereby improving the pressing effect on the guide plate 20.

[0054] Specifically, when the pressing portion 82 presses the gear 60, the gear 60 can apply a pressing force to the abutting plate 100, and then the guide plate 20 is pressed against the mounting body 10 through the pressing action of the abutting plate 100. The above method of pressing the guide plate 20 against the mounting body 10 by the abutting plate helps to increase the pressing area on the guide plate 20, thereby improving the pressing effect on the guide plate 20.

[0055] Continuing to refer to Figure 2 , preferably, a positioning portion 110 is provided on one side of the abutting plate 100 facing away from the mounting body 10. The positioning portion 110 extends parallel to the length direction L1 of the guide plate 20, and the edge of the rack 52 facing away from the gear 60 is in movable abutment with the positioning portion 110. In this way, the guiding effect of the positioning portion 110 on the rack 52 can be realized, and the stability of the rack 52 during movement can be improved.

[0056] Optionally, the positioning portion 110 described above can be, but is not limited to, implemented as a long positioning block. Preferably, the positioning portion 110 can also be, but is not limited to, implemented as a positioning roller or a positioning chute, which helps to reduce friction and improve the movement smoothness of the rack 52.

[0057] Optionally, referring to Figure 2 , a first guiding arc 21 is provided at one side edge of the guide plate 20 in contact with the flange structure 51, and a second guiding arc 511 is provided at one side edge of the flange structure 51 in contact with the guide plate 20. The first guiding arc 21 and the second guiding arc 511 can fit with each other, which helps to increase the contact area between the guide plate 20 and the flange structure 51, thereby improving the fitting degree between the guide plate 20 and the flange structure 51, enhancing the stability of the contact, and reducing vibration.

[0058] On the other hand, the arrangement in which the first guiding arc 21 and the second guiding arc 511 fit with each other in this embodiment also helps to reduce the crosstalk of the push plate 50 and improve the fitting tightness with the guide plate 20. The specific analysis is as follows.

[0059] Through the arrangement of the first guiding arc 21 and the second guiding arc 511 in this embodiment, the movement path of the flange structure 51 relative to the guide plate 20 is restricted to the arc direction along the first guiding arc 21. When the flange structure 51 has a tendency to move along the arc direction of the first guiding arc 21, it means that the flange structure 51 has a certain displacement tendency in both the horizontal and vertical directions. In other words, if the flange structure 51 is to crosstalk on the above arc path, crosstalk will only occur under the condition that there is no limiting effect in both the vertical and horizontal directions. Subsequently, as long as the movement tendency of the flange structure 51 in one direction is restricted, the movement of the flange structure 51 in the other direction can be automatically restricted by the first guiding arc 21.

[0060] Returning to the present application, when the clamping effect of the positioning portion 110 and the gear 60 on the rack 52 in the vertical direction is reduced, that is, the flange structure 51 has a tendency to crosstalk in the vertical direction. In other words, the flange structure 51 has a tendency to have relative displacement on the arc path of the first guiding arc 21. At this time, when the flange structure 51 can still maintain a limiting effect in the horizontal direction, the flange structure 51 will not have displacement on the arc path of the first guiding arc 21 relative to the guide plate 20, thereby preventing its crosstalk in the up and down vertical direction, improving the fitting stability between the flange structure 51 and the guide plate 20, and reducing the vibration and noise between the two.

[0061] For further comparative analysis, if the edges of the guide plate 20 and the flange structure 51 that are in contact with each other are both straight edges, when the clamping action of the positioning portion 110 and the gear 60 on the rack 52 is reduced, that is, when the flange structure 51 has a tendency to move vertically, different from the above embodiments, the flange structure 51 does not need to displace along an arc path. In other words, the flange structure 51 does not need to undergo a certain horizontal displacement to move vertically up and down. In this way, even when there is a limiting effect in the horizontal direction, the flange structure 51 will still move vertically up and down, thereby generating vibration and noise.

[0062] Therefore, in the above embodiment of the present application where "the first guide arc 21 is provided on the edge of the guide plate 20 in contact with the flange structure 51, the second guide arc 511 is provided on the edge of the flange structure 51 in contact with the guide plate 20, and the first guide arc 21 and the second guide arc 511 can fit together", on the one hand, it can increase the contact area between the flange structure 51 and the guide plate 20 and improve the contact stability, and on the other hand, it can prevent the flange structure 51 from moving vertically, reducing vibration and noise.

[0063] Optionally, referring to Figure 2 , a limiting boss 12 is provided on the side of the mounting body 10 facing the guide plate 20. When the flange structure 51 pushes the guide plate 20 to move away from the guide wheel 30, the flange structure 51 can abut against the side wall of the limiting boss 12, so as to limit the moving stroke of the guide plate 20, thereby preventing the chain 40 from being overly tensioned and improving the working safety of the chainsaw 1.

[0064] Preferably, still referring to Figure 2 , the limiting boss 12 is provided with a limiting flange 121 protruding from its surface. The limiting flange 121 extends along the length direction L1 of the guide plate 20. Combining Figure 7 as shown, the guide plate 20 is provided with a limiting guide groove 22 extending along the length direction L1 of the guide plate 20. The limiting guide groove 22 is clamped to the limiting flange 121, so that the guide plate 20 can move relative to the limiting flange 121 along the above length direction L1, so as to realize the guiding and positioning of the guide plate 20 and improve the movement stability of the guide plate 20.

[0065] More preferably, in this embodiment, the two ends of the limiting guide groove 22 respectively have a guiding opening 221 and an arc-shaped limiting portion 222. The guiding opening 221 is used for the limiting flange 121 to pass through, so as to improve the assembly simplicity of the guide plate 20 and the limiting flange 121. The arc-shaped limiting portion 222 is used to abut against the side wall of the limiting flange 121, so as to limit the moving stroke of the guide plate 20 in the direction close to the guide wheel 30, prevent the guide plate 20 from interfering with the guide wheel 30, and improve the working safety of the chainsaw 1. It can be understood that the limiting guide groove 22 is used for the rotating portion 81 to pass through and enables the rotating portion 81 to move relative to the guide plate 20 in the limiting guide groove 22.

[0066] Optionally, the chainsaw 1 further includes a driving member (not shown), which is drivingly connected to the guide wheel 30. The driving member is used to drive the guide wheel 30 to rotate and drive the chain 40 to move cyclically along the edge of the guide plate 20. Additionally, it can be understood that blades are evenly distributed along the chain 40, thus realizing the cutting operation of the chainsaw 1.

[0067] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as within the scope described in this specification.

[0068] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A chain saw, characterized in that: The chain saw comprises: Install the body; Guide plate; A guide wheel, wherein the guide plate and the guide wheel are spaced apart and arranged on the same side of the mounting body; A chain, wherein the chain is sleeved on the guide plate and the guide wheel along the edges of the guide plate and the guide wheel; A push plate, the push plate having a flange structure and a rack, the flange structure is used to abut against an edge of the guide plate opposite to the guide wheel, and the rack extends in a length direction parallel to the guide plate; a gear meshing with the rack; a first adjusting knob, the first adjusting knob being sleeved and meshed with the gear, the first adjusting knob being used to be twisted and drive the gear to rotate, and when the gear rotates, the gear drives the rack to move in a direction parallel to the length direction of the guide plate, and the flange structure pushes the guide plate to move in the length direction; The second adjusting knob is arranged on a side of the first adjusting knob away from the guide plate and is used to press the guide plate against the mounting body or release the guide plate from pressing the mounting body.

2. The chain saw according to claim 1, characterized in that The second adjusting knob includes a rotating part and a clamping part, the clamping part is connected to one end of the rotating part, the other end of the rotating part is passed through the first adjusting knob, the gear and the guide plate, and is threadedly connected to the mounting body, and the clamping part can abut against the gear.

3. The chain saw according to claim 2, characterized in that The first adjusting knob is provided with a first mounting groove along the rotation axis of the gear, and the pressing portion can pass through the first mounting groove and abut against the gear.

4. The chain saw according to claim 1, characterized in that The chain saw also includes a mounting shell, which is used to cover the side of the gear away from the mounting body. The mounting shell is provided with a second mounting groove along the rotation axis of the gear. The first adjusting knob is installed in the second mounting groove and meshes with the gear.

5. The chain saw according to claim 4, characterized in that The first adjusting knob comprises an engaging portion, the engaging portion passes through the second mounting slot and engages with the gear, a clamping slot is provided on the circumferential outer wall of the engaging portion away from the gear, and the clamping slot is used to install a clamping ring.

6. The chain saw according to any one of claims 1 to 5, characterized in that: The chain saw further includes an abutment plate interposed between the gear and the guide plate.

7. The chain saw according to claim 6, characterized in that A positioning portion is provided on one side of the abutment plate away from the mounting body. The positioning portion extends parallel to the length direction of the guide plate, and an edge of one side of the rack away from the gear is movably abutted against the positioning portion.

8. The chain saw according to claim 1, characterized in that A first guide arc is provided on one side edge where the guide plate abuts against the flange structure, and a second guide arc is provided on one side edge where the flange structure abuts against the guide plate. The first guide arc and the second guide arc can fit each other.

9. The chain saw according to claim 1, characterized in that A limiting boss is provided on one side of the mounting body facing the guide plate. When the flange structure pushes the guide plate to move in a direction away from the guide wheel, the flange structure can abut against the limiting boss.

10. The chain saw according to claim 9, characterized in that The limiting boss is provided with a limiting flange protruding from its surface, and the limiting flange extends along the length direction of the guide plate. The guide plate is provided with a limiting guide groove extending along the length direction of the guide plate, and the limiting guide groove is clamped in the limiting flange, so that the guide plate can move relative to the limiting flange along the length direction.

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