A chain saw assembly

Abstract

The application relates to a chain saw assembly, belonging to the chain saw field, which comprises a guide plate and a saw chain, the saw chain rotates around the periphery of the guide plate, the saw chain comprises a driving piece, a connecting piece and a blade which are sequentially and rotatably connected, the connecting piece is connected with the driving piece through a rotating pin, the periphery of the guide plate is provided with a guide groove, the groove bottom surface of the guide groove is provided as a sharp convex surface, the sharp convex surface is composed of two symmetrical inclined surfaces, the opposite two groove walls of the guide groove are provided as protruding support portions, the support portion is provided with an upper inclined surface and a lower inclined surface, the included angle between the upper inclined surface and the lower inclined surface is greater than or equal to 120 DEG, a waist-shaped chip removal opening is arranged at the intersection between the groove wall and the groove bottom of the guide groove; the middle part of the two side surfaces of the driving piece is provided with a sliding body, the sliding body is in abutting fit with the upper inclined surface; the lower part of the driving piece is located between the adjacent two lower inclined surfaces and is suspended above the sharp convex surface. The application can reduce the situation that the stability of the saw chain is affected due to the accumulation of chips.

Description

Technical Field

[0001] This application relates to the field of chainsaws, and more particularly to a chainsaw assembly. Background Technology

[0002] A chainsaw is a hand-held saw (cutting machine) powered by a gasoline engine, mainly used for logging and timber processing. Its working principle is to perform cutting action by the lateral movement of the L-shaped blades on the saw chain.

[0003] A chainsaw assembly consists of a saw chain and a guide plate. The saw chain includes a drive plate, a connecting plate, and blades. The guide plate has guide grooves around its perimeter, and the drive plate is located within these grooves. The bottom of the drive plate abuts against the bottom of the groove and moves relative to it. During the cutting process (logging or cutting lightweight bricks), mud, sand, or sawdust can enter the guide grooves. Although the drive plate carries away most of the debris as it moves, some debris remains. Some of this debris is sticky and tends to accumulate. When there is a lot of debris in the guide grooves, the friction between the saw chain and the guide plate increases, which can affect the stability of the saw chain to some extent. In severe cases, it can even lead to damage to the guide plate or breakage of the saw chain. Summary of the Invention

[0004] In order to reduce the impact of debris accumulation on the stability of the saw chain, this application provides a chainsaw assembly.

[0005] This application provides a chainsaw assembly, which adopts the following technical solution: A chainsaw assembly includes a guide plate and a saw chain. The saw chain rotates around the periphery of the guide plate. The saw chain includes a drive plate, a connecting plate, and blades fixed at intervals on the connecting plate, which are connected in a rotatable manner from end to end. The connecting plate and the drive plate are connected by a rotating pin. The periphery of the guide plate has a guide groove. The bottom surface of the guide groove is a pointed convex surface, which is composed of two symmetrical inclined surfaces. The two opposite walls of the guide groove are each provided with a support portion. The support portion has an upper inclined surface and a lower inclined surface. The included angle between the upper inclined surface and the lower inclined surface is greater than or equal to 120°. A waist-shaped chip discharge port is provided at the junction between the groove wall and the bottom of the guide groove. The drive plate has a sliding body in the middle of both sides, which abuts against the upper inclined surface. The lower part of the drive plate is located between two adjacent lower inclined surfaces and is suspended directly above the pointed convex surface.

[0006] By adopting the above technical solution, the sliding body cooperates with the upper inclined surface, allowing the transmission plate to slide relative to each other and be suspended above the bottom of the guide groove. Debris tends to accumulate at the bottom of the guide groove, meaning that the debris has little impact on the transmission plate. Secondly, the inclined surfaces of the upper inclined surface and the convex surface are both inclined, so the debris splashed into the guide groove will move into the gap between the lower inclined surface and the convex surface and be discharged from the chip outlet, thus reducing the accumulation of debris in the guide groove and further reducing the occurrence of the saw chain stability being affected by the accumulation of debris.

[0007] In summary, by setting up a suspended transmission plate and a guide groove with multiple inclined surfaces, not only can the impact of debris on the transmission plate be reduced, but debris can also be accumulated and discharged in a reasonable position, further reducing the occurrence of saw chain stability issues caused by debris accumulation.

[0008] Optionally, the upper inclined surface and the lower inclined surface are transitioned by a rounded corner, and the lower edge of the lower inclined surface extends to the edge of the chip discharge port.

[0009] Optionally, the included angle between the two symmetrical inclined surfaces of the pointed convex surface is 25°-45°, and the distance between the lower inclined surface and the pointed convex surface gradually decreases along the direction toward the chip discharge port.

[0010] Optionally, the guide plate includes a core plate and two outer plates. The outer plates are welded to the core plate. The part of the outer plate that is in contact with the core plate is called the contact part, and the part of the outer plate that is not in contact with the core plate is called the exposed part. The support part is integrally formed on the inner surface of the exposed part. The pointed convex surface is the outer peripheral surface of the core plate. The opposing surfaces of the two exposed parts and the outer peripheral surface of the core plate together form the guide groove. The exposed parts are inclined relative to the contact parts, so that the distance between the outer surfaces of the exposed parts of the two outer plates gradually decreases in the direction away from the core plate.

[0011] Optionally, the sliding body is a sliding protrusion integrally formed on the middle of the side of the transmission plate.

[0012] Optionally, the upper inclined surface is provided with a raceway, the sliding body includes a steel ball, the transmission plate is divided into two symmetrically arranged segments along its own thickness direction, the two segments are welded together, the opposite surfaces of the segments are provided with mounting holes, the steel ball is located in the mounting holes, the steel ball is exposed outside the segments and slides with the raceway, the line connecting the contact point between the steel ball and the raceway through the center of the steel ball is set as the contact line, and the included angle between the contact lines of the two steel balls is 90°-130°.

[0013] Optionally, a solid oil block is fixed in the mounting holes of the two segments, and the two sides of the solid oil block abut against the two steel balls respectively.

[0014] Optionally, a turntable is provided between the two segments. The turntable is coaxially arranged with the line connecting the centers of the two steel balls. A positioning hole is provided at the center of the turntable. The two edges of the positioning hole are conical surfaces. The steel balls abut against the conical surfaces, allowing the turntable to rotate relative to the transmission plate. The two surfaces of the turntable are respectively in contact with the opposite surfaces of the two segments. The outer circumference of the turntable is provided with a trapezoidal annular groove. The bottom surface of the annular groove has a first micro-tooth. The sharp point of the convex surface has a second micro-tooth. The width of the first micro-tooth is greater than the width of the second micro-tooth. The first micro-tooth and the second micro-tooth cooperate with each other.

[0015] Optionally, a turntable is provided between the two segments, with a positioning hole at the center of the turntable. The two edges of the positioning hole are tapered surfaces, which are used to abut against the steel ball. The two surfaces of the turntable are respectively in contact with the opposite surfaces of the two segments. The outer circumference of the turntable is provided with a trapezoidal annular groove. The bottom surface of the annular groove has a first micro-tooth, and the sharp point of the convex surface has a second micro-tooth. The first micro-tooth and the second micro-tooth cooperate. The mounting hole has an inner cylindrical surface coaxial with the steel ball, and the steel ball slides axially with the inner cylindrical surface. The transmission plate is provided with a spring and an abutting ball. The spring force is used to force the abutting ball to move down and abut against the annular groove. When the transmission plate is pressed and moves towards the bottom of the guide groove, the transmission plate drives the steel ball to move down, and the steel ball abuts against the raceway through the guidance of the tapered surface.

[0016] Optionally, the connecting piece has an upper guide surface, the outer edge of the guide plate has a lower guide surface, and the raceway has a first abutment point and a second abutment point. When the steel ball engages with the first abutment point, the upper guide surface and the lower guide surface have a gap. When the transmission piece and the connecting piece move toward the bottom of the guide groove, the two opposite edges of the guide plate elastically deform along the separation direction, the steel ball moves to the second abutment point to engage, the upper guide surface and the lower guide surface come into contact, and the pressure of the connecting piece is converted into a force that prevents the two opposite edges of the guide plate from elastically deforming along the separation direction through the engagement of the upper guide surface and the lower guide surface.

[0017] In summary, this application includes at least one of the following beneficial technical effects: By setting up a suspended drive plate and a guide groove with multiple bevels, not only can the impact of debris on the drive plate be reduced, but debris can also be accumulated and discharged in a reasonable position, further reducing the occurrence of situations where debris accumulation affects the stability of the saw chain. Attached Figure Description

[0018] Figure 1 This is a partial schematic diagram of the chainsaw assembly in Example 1.

[0019] Figure 2 yes Figure 1 A cross-sectional view along the AA direction.

[0020] Figure 3 This is a partial cross-sectional view of the chainsaw assembly of Example 2.

[0021] Figure 4 This is a partial cross-sectional view of the chainsaw assembly of Example 3.

[0022] Figure 5 This is a partial cross-sectional view of the chainsaw assembly of Example 4.

[0023] Figure 6 This is a partial cross-sectional view of the chainsaw assembly of Example 5.

[0024] Figure 7 This is a partial cross-sectional view of the chainsaw assembly of Example 6.

[0025] Figure 8 yes Figure 7 A magnified view of a section at point B.

[0026] Figure 9 This is a schematic diagram of Example 7 showing the transmission plate in a high position.

[0027] Figure 10 yes Figure 9 A magnified view of a section at point C.

[0028] Figure 11 This is a schematic diagram of Example 7 showing the transmission plate in a low position.

[0029] Figure 12 yes Figure 11 A magnified view of a section at point D.

[0030] Explanation of reference numerals in the attached drawings: 1. Transmission plate; 2. Support part; 3. Turntable; 10. Saw chain; 100. Connecting plate; 101. Upper guide surface; 102. Lower guide surface; 300. Blade; 11. Sliding protrusion; 111. Steel ball; 12. Segment; 121. Mounting hole; 13. Limiting block; 14. Solid oil block; 20. Guide plate; 200. Guide groove; 201. Chip discharge port; 202. Core plate; 203. Outer plate; 2031. Fitting part; 2032. Exposed part; 204. Sharp convex surface; 21. Upper inclined surface; 22. Lower inclined surface; 23. Raceway; 31. Positioning hole; 32. Conical surface; 33. Annular groove; 34. Spring; 35. Abutment ball; 36. Groove body. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 -Appendix Figure 12 This application will be described in further detail.

[0032] Example 1 discloses a chainsaw assembly. (Refer to...) Figure 1 The chainsaw assembly includes a guide plate 20 and a saw chain 10. The saw chain 10 rotates around the periphery of the guide plate 20. The saw chain 10 includes a drive plate 1, a connecting plate 100, and blades 300 fixed at intervals on the connecting plate 100, which are connected in a rotating manner from end to end. The connecting plate 100 and the drive plate 1 are connected by a rotating pin.

[0033] like Figure 2As shown, the guide plate 20 has a guide groove 200 around its periphery. Specifically, the guide plate 20 includes a core plate 202 and two outer plates 203. The outer plates 203 are welded to the core plate 202. The part of the outer plate 203 that is in contact with the core plate 202 is designated as the contact part 2031, and the part of the outer plate 203 that is not in contact with the core plate 202 is designated as the exposed part 2032 (the exposed part 2032 is the outer edge of the outer plate 203). The outer peripheral surface of the core plate 202 is a pointed convex surface 204, and its cross-sectional profile is an inverted V-shape, that is, the pointed convex surface 204 is composed of two symmetrical inclined surfaces. The exposed parts 2032 on both sides and the pointed convex surface 204 together form the guide groove 200.

[0034] Both exposed portions 2032 have a support portion 2 protruding from their opposing surfaces. The support portion 2 has an upper inclined surface 21 and a lower inclined surface 22. The included angle between the upper inclined surface 21 and the lower inclined surface 22 is greater than or equal to 120°. The upper inclined surface 21 and the lower inclined surface 22 are connected by a rounded corner. The upper edge of the upper inclined surface 21 extends to the outer edge of the outer plate 203. A waist-shaped chip discharge port 201 is provided in the part of the exposed portion 2032 near the core plate 202. The lower edge of the lower inclined surface 22 extends to the edge of the opening of the chip discharge port 201. That is, the support portion 2 is completely distributed on the inner surface of the exposed portion 2032, so that the overall thickness of the exposed portion 2032 is large, thereby ensuring the structural strength of the outer plate 203.

[0035] The included angle between the two symmetrical inclined surfaces of the pointed convex surface 204 is 25°-45°. The distance between the lower inclined surface 22 and the pointed convex surface 204 gradually decreases along the direction towards the chip discharge port 201. The particulate debris is more likely to form a jamming effect in a narrow area, that is, the debris is more likely to accumulate in that place and is less likely to spread to other places again, thus reducing the impact of the debris on the transmission plate 1.

[0036] Both sides of the transmission plate 1 have a sliding body in the middle. In this embodiment, the sliding body is a sliding protrusion 11 integrally formed in the middle of the side of the transmission plate 1. The sliding protrusion 11 abuts against the upper inclined surface 21, so that the lower part of the transmission plate 1 is located between two adjacent lower inclined surfaces 22 and suspended directly above the pointed protrusion 204.

[0037] The implementation principle of Example 1 is as follows: First, by the cooperation of the sliding body with the upper inclined surface 21, the transmission plate 1 slides relative to each other and is suspended at the bottom of the guide groove 200. Since the debris tends to accumulate at the bottom of the guide groove 200, the debris has little impact on the transmission plate 1. In addition, the two sliding protrusions 11 are inclined to abut against the upper inclined surface 21 to play a corrective role, thereby improving the straightness and smoothness of the saw chain 10 and improving the cutting effect.

[0038] Secondly, since the inclined surfaces of the upper inclined surface 21 and the pointed convex surface 204 are both inclined, the debris splashed into the guide groove 200 will move into the gap between the lower inclined surface 22 and the pointed convex surface 204 and be discharged from the chip discharge port 201. This reduces the accumulation of debris in the guide groove 200, further reduces the occurrence of the saw chain 10 being affected by the accumulation of debris, and to a certain extent guides the debris to accumulate in a reasonable position, keeping it away from the transmission plate 1.

[0039] Regarding chip removal, depending on the working conditions, there are two main methods: First, with the chip discharge port 201 in a normally open state, the vibration of the chainsaw assembly during operation can be used to accelerate chip movement, making it easier for chips in the guide groove 200 to exit through the chip discharge port 201. Alternatively, chips can be cleaned through the chip discharge port 201 after the machine has stopped. Second, blocking structures such as blocking blocks can be used to pre-block the chip discharge port 201, preventing external chips from easily entering the guide groove 200 from the chip discharge port 201. Furthermore, since the chip accumulation point is far from the transmission plate 1, even if excessive chips accumulate, the impact is limited. The blocking structure can be removed and the chips cleaned after the machine has stopped. In summary, by setting a suspended transmission plate 1 and a multi-sloped guide groove 200, not only can the impact of chips on the transmission plate 1 be reduced, but chips can also accumulate and be discharged at appropriate locations, further reducing the occurrence of chip accumulation affecting the stability of the saw chain 10.

[0040] Example 2, the difference between Example 2 and Example 1 is that, as Figure 3 As shown, the exposed portion 2032 is inclined relative to the fitting portion 2031, and the two exposed portions 2032 are inclined towards each other, so that the distance between the outer surfaces of the exposed portions 2032 of the two outer plates 203 gradually decreases in the direction away from the core plate 202. In this way, the ability of the exposed portion 2032 to resist outward deformation is greatly improved.

[0041] When the transmission plate 1 is pressed, it moves towards the bottom of the guide groove 200. The pressure of the transmission plate 1 is converted into a force that forces the exposed parts 2032 on both sides to deform outward through the cooperation of the sliding protrusion 11 and the upper inclined surface 21. The ability of the exposed parts 2032 to resist outward deformation is greatly improved, which can effectively resist this force, thereby improving the compressive strength and positional stability of the transmission plate 1, thus ensuring the cutting effect.

[0042] Example 3 differs from Example 1 in that, as Figure 4As shown, the transmission plate 1 is divided into two symmetrically arranged segments 12 along its thickness direction. The two segments 12 are welded together. The opposite surfaces of the segments 12 are provided with mounting holes 121. The mounting holes 121 extend to the disjoint surfaces of the segments 12. A steel ball 111 is provided in the mounting hole 121. The mounting hole 121 has an inner cylindrical surface coaxial with the steel ball 111. The steel ball 111 slides axially with the inner cylindrical surface. A limit block 13 is fixed in both mounting holes 121.

[0043] During assembly, the steel ball 111 is placed into the mounting hole 121, and then the limiting block 13 is installed. The two segments 12 are joined together and welded, so that the two ends of the limiting block 13 abut against the two steel balls 111 respectively, keeping the position of the steel ball 111 stable in the mounting hole 121. The steel ball 111 is exposed on the outer side of the middle part of the segment 12. It should be noted that the opening size of one end of the mounting hole 121 is small, which can restrict the steel ball 111 from coming out.

[0044] The upper inclined surface 21 is provided with a raceway 23, which extends along the moving direction of the saw chain 10. The steel ball 111 slides with the raceway 23. The line connecting the contact point between the steel ball 111 and the raceway 23 through the center of the steel ball 111 is set as the contact line. The included angle between the contact lines of the two steel balls 111 is 90°-130°.

[0045] In this way, by setting the steel ball 111 and the raceway 23 to cooperate, the sliding friction between the transmission plate 1 and the guide plate 20 can be reduced, thereby reducing the subsequent problems caused by the increase in friction due to the accumulation of debris.

[0046] Example 4 differs from Example 3 in that, as Figure 5 As shown, the limiting block 13 is replaced with a solid oil block 14, and the two sides of the solid oil block 14 abut against the two steel balls 111 respectively.

[0047] The solid oil block 14 can not only limit the movement of the steel ball 111, but also lubricate the steel ball 111. Under the heat generated by high-speed friction and vibration, the solid oil block 14 will slowly release grease to lubricate the steel ball 111 and further reduce frictional resistance.

[0048] Example 5 differs from Example 3 in that, as Figure 6 As shown, the connecting piece 100 is provided with an upper guide surface 101, the outer edge of the guide plate 20 is provided with a lower guide surface 102, and the raceway 23 has a first abutment point and a second abutment point (not shown in the figure). The first abutment point is farther away from the bottom of the guide groove 200 than the second abutment point.

[0049] When the transmission plate 1 is not under pressure or under very little pressure (pressure refers to the reaction force experienced by the saw chain 10 when it comes into contact with the object being cut), the steel ball 111 is engaged with the first contact point, and the upper guide surface 101 and the lower guide surface 102 have a gap. At this time, there are only two points of support, the friction is small, and the power loss is reduced.

[0050] When the transmission plate 1 is under greater pressure, the transmission plate 1 and the connecting plate 100 move toward the bottom of the guide groove 200. The transmission plate 1 drives the steel ball 111 to move relative to the guide plate 20. Therefore, the steel ball 111 will force the two exposed parts 2032 to elastically deform in the direction of separation. At the same time, the steel ball 111 moves to the second contact point to cooperate. During this process, the upper guide surface 101 and the lower guide surface 102 are in contact. The pressure of the connecting plate 100 is transformed into a force that prevents the two opposite edges of the guide plate 20 from elastically deforming in the direction of separation through the cooperation of the upper guide surface 101 and the lower guide surface 102. That is, the pressure is partially offset by itself and is supported at four points (supported by the two steel balls 111 plus the support of the two upper guide surfaces 101), thereby improving the structural stability and cutting effect of the saw chain 10.

[0051] Example 6 differs from Example 3 in that, as Figure 7 , Figure 8 As shown, a turntable 3 is provided between the two segments 12. The turntable 3 is coaxially arranged with the line connecting the centers of the two steel balls 111. Specifically, a positioning hole 31 is provided at the axis of the turntable 3. The two edges of the positioning hole 31 are tapered surfaces 32. The steel balls 111 abut against the tapered surfaces 32, so that the turntable 3 can rotate relative to the transmission plate 1. Furthermore, the two surfaces of the turntable 3 are respectively in contact with the opposite surfaces of the two segments 12.

[0052] The outer circumferential surface of the turntable 3 is provided with a trapezoidal cross-section annular groove 33. The bottom surface of the annular groove 33 has a first micro tooth (not shown in the figure). Multiple first micro teeth are arranged around the annular groove 33. The sharp part of the pointed convex surface 204 is provided with a second micro tooth (not shown in the figure). Multiple second micro teeth are arranged along the moving direction of the saw chain 10. The first micro tooth and the second micro tooth cooperate. The width of the first micro tooth is greater than the width of the second micro tooth to improve the degree of freedom of the position adjustment of the transmission plate 1.

[0053] The implementation principle of Example 6 is as follows: When the saw chain 10 is running, the cooperation of the first micro-tooth and the second micro-tooth will drive the turntable 3 to rotate at high speed, generating angular momentum. According to the law of conservation of angular momentum, the rotating turntable 3 will resist external interference and maintain its own axial stability. In addition, the turntable 3 can maintain the stability of the steel ball 111 through the contact of the conical surface 32, and maintain the stability of the segment 12 through the contact of the turntable 3 with the segment 12. This ensures that both steel balls 111 can maintain a stable position abutting the raceway 23. That is, when the transmission plate 1 is not pressed or the pressure on the transmission plate 1 is small, the positional stability of the transmission plate 1 itself is poor, while the high-speed rotating turntable 3 can maintain the stability of the transmission plate 1. The position of the transmission plate 1 is stabilized to correct it in advance (because the width of the first micro-tooth is greater than the width of the second micro-tooth, the transmission plate 1 has a degree of freedom for position adjustment), so that both steel balls 111 can maintain their position in contact with the raceway 23. In this way, when the transmission plate 1 runs to the pressure state, the steel balls 111 can transmit the pressure of the transmission plate 1 in time, thereby reducing the occurrence of the steel balls 111 colliding and damaging the raceway 23 due to excessive gap between the steel balls 111 and the raceway 23. That is, by setting the turntable 3, the positions of the transmission plate 1 and the steel balls 111 can be stabilized in advance to better cope with the cutting conditions under pressure, thereby improving the cutting effect.

[0054] Example 7 differs from Example 6 in that, as Figure 9 , Figure 10 As shown, the transmission plate 1 is provided with a spring 34 and an abutment ball 35. Specifically, the plate 12 is provided with a groove 36, which is vertically arranged and located in the part of the plate 12 away from the bottom of the guide groove 200. The spring 34 and the abutment ball 35 are both located in the groove 36. The elastic force of the spring 34 is used to force the abutment ball 35 to move down and abut against the bottom surface of the annular groove 33.

[0055] When the transmission plate 1 is not under pressure or under very little pressure (pressure refers to the reaction force experienced by the saw chain 10 when it comes into contact with the object being cut), such as Figure 9 , Figure 10 As shown, the pointed convex surface 204 supports the turntable 3, and the turntable 3 supports the transmission plate 1 by the elastic force of the spring 34. The transmission plate 1 is in a high position. At this time, the steel ball 111 is in a state of no contact with the raceway 23 or slight contact with the raceway 23. That is, in this state, there is only single-point support, the friction is small, and the power loss is reduced. At the same time, the high-speed rotating turntable 3 can keep the position of the transmission plate 1 stable, so as to correct the position of the transmission plate 1 and the steel ball 111 in advance, so that the line connecting the centers of the two steel balls 111 is in a horizontal state, so as to prepare for the subsequent synchronous contact with the raceway 23, making the subsequent synchronous contact more balanced and stable.

[0056] When the transmission plate 1 is subjected to greater pressure (this part of the saw chain 10 contacts the object being cut), such as Figure 11 , Figure 12 As shown, when the transmission plate 1 is pressed and moves towards the bottom of the guide groove 200, that is, when the transmission plate 1 is in a low position, the transmission plate 1 drives the steel ball 111 to move down. The steel ball 111 moves axially along the inner cylindrical surface through the guidance of the conical surface 32 and abuts against the raceway 23, that is, three-point support. The transmission plate 1 is more stable, thereby improving the cutting effect.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A chainsaw assembly, comprising a guide plate (20) and a saw chain (10), the saw chain (10) rotating around the periphery of the guide plate (20), the saw chain (10) comprising a drive plate (1), a connecting plate (100), and blades (300) fixed at intervals on the connecting plate (100) in a sequentially rotatable manner, the connecting plate (100) being connected to the drive plate (1) by a rotating pin, characterized in that: The guide plate (20) has a guide groove (200) around its periphery. The bottom surface of the guide groove (200) is a pointed convex surface (204). The pointed convex surface (204) is composed of two symmetrical inclined surfaces. The two opposite walls of the guide groove (200) are both convex and have a support part (2). The support part (2) has an upper inclined surface (21) and a lower inclined surface (22). The included angle between the upper inclined surface (21) and the lower inclined surface (22) is greater than or equal to 120°. A waist-shaped chip discharge port (201) is provided at the junction between the groove wall and the bottom of the guide groove (200). The transmission plate (1) has a sliding body in the middle of both sides. The sliding body abuts against the upper inclined surface (21). The lower part of the transmission plate (1) is located between two adjacent lower inclined surfaces (22) and is suspended directly above the pointed convex surface (204).

2. The chainsaw assembly according to claim 1, characterized in that: The upper inclined surface (21) and the lower inclined surface (22) are connected by a rounded corner, and the lower edge of the lower inclined surface (22) extends to the edge of the opening of the chip discharge port (201).

3. The chainsaw assembly according to claim 1, characterized in that: The included angle between the two symmetrical inclined surfaces of the pointed convex surface (204) is 25°-45°, and the distance between the lower inclined surface (22) and the pointed convex surface (204) gradually decreases along the direction toward the chip discharge port (201).

4. The chainsaw assembly according to claim 1, characterized in that: The guide plate (20) includes a core plate (202) and two outer plates (203). The outer plates (203) are welded to the core plate (202). The part of the outer plate (203) that is in contact with the core plate (202) is designated as the contact part (2031), and the part of the outer plate (203) that is not in contact with the core plate (202) is designated as the exposed part (2032). The support part (2) is integrally formed on the inner surface of the exposed part (2032). The pointed convex surface (204) is the outer peripheral surface of the core plate (202). The opposing surfaces of the two exposed parts (2032) and the outer peripheral surface of the core plate (202) together form the guide groove (200). The exposed part (2032) is inclined relative to the contact part (2031), so that the distance between the outer surfaces of the exposed parts (2032) of the two outer plates (203) gradually decreases in the direction away from the core plate (202).

5. The chainsaw assembly according to claim 1, characterized in that: The sliding body is a sliding protrusion (11) integrally formed on the middle of the side of the transmission plate (1).

6. The chainsaw assembly according to claim 1, characterized in that: The upper inclined surface (21) is provided with a raceway (23), the sliding body includes a steel ball (111), the transmission plate (1) is divided into two symmetrically arranged segments (12) along its own thickness direction, the two segments (12) are welded together, the opposite surfaces of the segments (12) are provided with mounting holes (121), the steel ball (111) is located in the mounting hole (121), the steel ball (111) is exposed outside the segments (12) and slides with the raceway (23), the line connecting the abutment point between the steel ball (111) and the raceway (23) through the center of the steel ball (111) is set as the abutment line, and the included angle between the abutment lines of the two steel balls (111) is 90°-130°.

7. The chainsaw assembly according to claim 6, characterized in that: A solid oil block (14) is fixed in the mounting holes (121) of the two segments (12), and the two sides of the solid oil block (14) abut against the two steel balls (111) respectively.

8. The chainsaw assembly according to claim 6, characterized in that: A turntable (3) is provided between the two segments (12). The turntable (3) is coaxially arranged with the line connecting the centers of the two steel balls (111). A positioning hole (31) is provided at the center of the turntable (3). The two edges of the positioning hole (31) are conical surfaces (32). The steel balls (111) abut against the conical surfaces (32), so that the turntable (3) can rotate relative to the transmission plate (1). The two surfaces of the turntable (3) are respectively in contact with the opposite surfaces of the two segments (12). The outer circumferential surface of the turntable (3) is provided with an annular groove (33) with a trapezoidal cross section. The bottom surface of the annular groove (33) has a first micro tooth. The sharp part of the pointed convex surface (204) is provided with a second micro tooth. The width of the first micro tooth is greater than the width of the second micro tooth. The first micro tooth and the second micro tooth cooperate.

9. The chainsaw assembly according to claim 6, characterized in that: A turntable (3) is provided between the two segments (12). A positioning hole (31) is provided at the axis of the turntable (3). The two opening edges of the positioning hole (31) are tapered surfaces (32). The tapered surfaces (32) are used to abut against the steel ball (111). The two disk surfaces of the turntable (3) are respectively attached to the opposite surfaces of the two segments (12). The outer peripheral surface of the turntable (3) is provided with an annular groove (33) with a trapezoidal cross section. The bottom surface of the annular groove (33) has a first micro tooth. The sharp part of the pointed convex surface (204) is provided with a second micro tooth. The first micro tooth and the second micro tooth cooperate. The mounting hole (121) has an inner cylindrical surface coaxial with the steel ball (111), and the steel ball (111) slides axially with the inner cylindrical surface; the transmission plate (1) is provided with a spring (34) and an abutting ball (35), and the elastic force of the spring (34) is used to force the abutting ball (35) to move down and abut against the annular groove (33); when the transmission plate (1) is pressed and moves towards the bottom of the guide groove (200), the transmission plate (1) drives the steel ball (111) to move down, and the steel ball (111) abuts against the raceway (23) through the guidance of the conical surface (32).

10. The chainsaw assembly according to claim 6, characterized in that: The connecting piece (100) is provided with an upper guide surface (101), the outer edge of the guide plate (20) is provided with a lower guide surface (102), and the raceway (23) has a first abutment point and a second abutment point. When the steel ball (111) is engaged with the first abutment point, the upper guide surface (101) and the lower guide surface (102) have a gap. When the transmission piece (1) and the connecting piece (100) move toward the bottom of the guide groove (200), the two opposite edges of the guide plate (20) elastically deform along the separation direction, the steel ball (111) moves to the second abutment point to engage, the upper guide surface (101) and the lower guide surface (102) fit together, and the pressure of the connecting piece (100) is converted into a force that prevents the two opposite edges of the guide plate (20) from elastically deforming along the separation direction through the engagement of the upper guide surface (101) and the lower guide surface (102).

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