KR20240018357A - Chain of chain saw - Google Patents

Abstract

The present invention relates to a chain of a chain saw. In a chain saw equipped with a chain to cut a workpiece while rotating in an infinite trajectory, the chain has a drive link equipped with an abrasive material at the top and a side fastened by connecting adjacent drive links. By including a connection pin installed through the overlapping area of the link, drive link, and side link, the drive link and side link absorb rotational friction, improve the durability of the rivet, and secure the stretched assembly of the drive link and side link. With a technical configuration that allows for simple replacement and removal, the power transmitted to the drive link is provided as cutting force, improving cutting efficiency.

Description

Chain of chain saw

The present invention relates to a chain saw, and more specifically, cutting force is actively provided by stably mounting an abrasive on a drive link, and a double bushing with good fixation force is used, or friction between the link and the connecting pin is induced by friction between the links, This relates to a chain saw chain that improves drive transmission by interlocking with each other when neighboring drive links operate.

Generally, a chain saw is configured so that a cutting chain equipped with an abrasive material including diamond powder rotates in an infinite trajectory by a power source, and is used for cutting or trimming steel or concrete. Depending on the type of power source, there are gasoline chain saws that use fuel, electric chain saws that use an electric motor, and hydraulic chainsaws that use hydraulic pressure.

For example, as shown in Figure 1, this chain saw has a main body 10 with a built-in power source, a guide plate 11 fixed to the main body 10 and protruding outward, and an infinite trajectory along the edge of the guide plate 11. It is provided with a chain 12 installed to rotate. Here, the chain 12 may include a plurality of drive links mounted to transmit power from a power source, side links mounted to connect the drive links, and an abrasive material mounted to cut by generating friction with the workpiece to be cut.

An example of such an installation structure between the drive link, side link, and abrasives is disclosed in US Patent No. 08651005, and will be described with reference to FIG. 2 or FIG. 3. First, as shown in FIG. 2, the side link 21 is disposed by connecting neighboring drive links 20, and is attached to the connection pin 22 penetrating the overlapping drive links 20 and side links 21. can be combined with each other. A cutting link 23 is disposed by connecting the neighboring driving links 20, and can be coupled to each other by a connecting pin 22 penetrating the overlapping driving links 20 and the cutting links 23. Here, a part of the cutting link 23 may be provided with an abrasive material 24 that is fused or electrodeposited for cutting by directly generating friction with the workpiece to be cut.

In this way, the combination of the drive link 20 and the side link 21, and the drive link 20 and the cutting link 23 can be arranged alternately as shown in FIG. 3 to form the chain 12 of the chain saw (see FIG. 1). there is.

However, the power of the power source is transmitted from the drive link 20 to the cutting link 23, and the cutting link 23, that is, the abrasive 24, is configured to cut the workpiece, so the power of the power source is lost. Cutting power may be weak.

In addition, a cutting link 23 that transmits forces of various sizes and directions generated by friction with the workpiece to be cut to the driving link 20, and a driving link 20 that transmits the power of the power source to the cutting link 23. As the distribution or balance of forces between the devices repeatedly conflict, the coupling portion where the connection pin 22 is installed has a structure that receives a lot of force, which causes increased wear.

In addition, due to the conflict of forces between the cutting link 23 and the driving link 20, the wear of the connecting pin 22 intensifies and ultimately the coupling between the cutting link 23 and the driving link 20 becomes loose, resulting in work. Noise may be generated from the cutting link (23) and the driving link (20), and if this is left unattended, the overall length of the chain (12) will eventually increase, making its use inconvenient due to frequent chain length corrections and shortening its service life. There is a problem.

And the coupling between the driving link 20, the side link 21, and the cutting link 23 is achieved by the connecting pin 22, and the driving link 20 is provided to the connecting pin 22 in the curved section of the infinite trajectory. As the friction force with the side link 21 or the cutting link 23 is concentrated, the wear of the connecting pin 22 intensifies, causing these connecting parts to become loose or loose, and the gap between the cutting link 23 and the driving link 20 increases. As it becomes wider, the installation tension of the chain 12 decreases, causing it to stretch, and there is a high risk of damage to the connecting pin 22.

The reason is that the connecting pin is a rivet that is joined by riveting. This rivet is a structure that deforms and secures both ends of the connecting pin 22 by pressure in order to quickly and smoothly connect the links between the links in the chain structure.

Therefore, the connecting pin has no choice but to have physical properties that cannot be expected to be rigid.

Therefore, when cutting relatively rigid materials such as metal or concrete with diamond abrasives, there is a problem that the chain easily sags due to significant wear.

For the above reasons, chain saw users have to frequently reduce the length of the chain, which increases due to loose gaps between the connecting links of the chain, rather than the inconvenience and economic loss caused by the wear of abrasives, which are the main functional purpose of the chain saw.

Furthermore, in severe cases, even though the durability of the abrasive remains, there is a problem in that it cannot be used due to sagging or cutting damage of the link.

US 08651005(B2) (registered on February 18, 2014) US 10,343,302(B2) (registered on July 9, 2019) Republic of Korea Patent No. 10-1568102 (announced on November 12, 2015) Republic of Korea Open Utility Model No. 20-2012-0000783 (published on February 2, 2012) Republic of Korea Open Utility Model No. 20-2012-0000779 (published on February 2, 2012)

The purpose of the present invention, which was devised to solve the above-mentioned problems, is to stably mount abrasives on the drive links and connect the drive links by side links, so that the driving force of the power source can be directly transmitted to the cutting force of the workpiece. To provide a chain of.

The purpose of the preferred example of the present invention is to induce friction between the bearings through a double bearing combination of the outer bushing mounted in the drive link mounting hole and the inner bushing whose rotation is restricted to the connecting link, thereby minimizing the wear friction force on the relatively soft connecting pin, thereby reducing the wear and tear of the chain. The goal is to minimize stretching.

In addition, for the purpose of another example, the ribs of the side links are fitted and coupled to the mounting holes of the drive links, so that when the chain is driven, the friction between the connection pins and the links in the curved section is replaced by friction between the side links and the drive links, and the ribs are directly connected to the connection pins. The aim is to provide a chain saw chain that significantly reduces the occurrence of friction wear and voids due to friction.

In addition, the purpose is to provide a meshing interlocking structure between adjacent drive links to improve the drive transmission power of the drive link in a stable and balanced manner, ultimately improving the drive transmission power of the chain.

In addition, the purpose of placing a bumper protrusion for obstacle protection at the upper center of the side link is to prevent damage from being caught by obstacles such as rebar or concrete fragments during work.

In addition, it provides a good kit for shortening the chain or replacing any single drive link unit.

In order to achieve the above-mentioned object, the chain of the chain saw according to the present invention is a chain saw equipped with a chain that rotates in an infinite trajectory to cut the workpiece, and the chain has an abrasive material mounted on the upper part of the plate and mounting holes on both sides. It includes a pair of side links with pinholes formed on both sides connecting the formed drive link and adjacent drive links, and a connection pin that pivotably couples the overlapping portions of the drive link and the side link.

It includes a chain link segment in which a drive link with mounting holes on both sides and a pair of side links with pinholes on both sides are interconnected by connecting pins to form a track,

A chain saw chain characterized in that uneven portions are formed on both sides of the drive link to engage with adjacent drive links.

Here, for example, the upper part of the drive link is flat or has a gently convex arc, and a groove for engaging an abrasive is formed on the upper part, thereby forming a locking protrusion at the front and rear ends of the groove.

This abrasive is seated in a flat groove at the top of the drive link and is attached and fixed with a sintered tip that is fixed by having the front and rear cross sections of the abrasive caught on the upper locking protrusion of the drive link.

In another example, the groove of the drive link has a gently convex arc, so that a locking protrusion is formed at the front and rear ends of the groove.

At this time, the groove may be provided with at least one engaging protrusion.

The fusion tip fixed to the groove attaches diamond powder, etc. to the bottom of the gently convex arc-shaped groove of the drive link and the upper surface of the drive link cap, which has a channel-shaped cross section that surrounds and covers the bottom and the front and rear walls of the drive link. In this way, the front and rear cross sections of the drive link cap are fixed to the upper locking protrusion of the drive link.

And when forming a coupling protrusion at the bottom of the gently convex arc-shaped groove of the drive link, a coupling hole is formed at a corresponding position of the drive link cap.

Meanwhile, round protruding pieces may be provided on both sides of the center of the driving link cap.

The drive link is generally a pentagonal plate, and the gap between it and the adjacent drive link forms a tooth groove so that the sprockets of the chain saw mesh together.

The drive link has mounting holes on both sides of the front,

The side link has pinholes machined on both sides of the front,

O-ring grooves are formed around the front and rear surfaces of both mounting holes, and O-rings are each coupled to a pair of side links.

In addition, as an example of the connecting portion of the connecting pin, a rib is provided around the pinhole on one side of the side link and is axially coupled to the inner diameter surface of the mounting hole of the driving link.

As another example of the coupling portion of the connecting pin, the connecting pin may be pivot-coupled with an outer bushing having an oval outer diameter and an inner bushing having an outer diameter inserted into the circular inner diameter of the outer bushing.

At this time, a protrusion is formed on one side of the inner bushing, and a notch groove is formed on the side link at the corresponding position so that pivot friction occurs only in the outer bushing and the inner bushing.

In addition, a bumper protrusion for obstacle defense can be formed to protrude from the upper center of the side link.

Additionally, as an optional repair kit, it may further include a repair side link with a female thread portion formed on the inner diameter surface of the pinhole of the side link, and a bolt coupled to the female thread portion.

The tip attached to the drive link that receives the power from the drive source directly cuts the workpiece, so the received power is provided as cutting force, which has the effect of improving cutting efficiency.

In addition, the pivot coupling of the connecting pin is pivot-coupled with an outer bushing having an oval outer diameter that is fixed by fitting into the oval mounting hole of the drive link and an inner bushing with a protrusion that is coupled and fixed to the notch groove of the side link, The bearing effect between bushings and the connecting pin combined on the inner part play a role in maintaining the chain structure, that is, the driving limb and connecting link.

Therefore, there is an effect of significantly reducing the wear rate of the plurality of pivot coupling parts to form the structure while the chain is running, thereby maintaining relatively stable chain tension between uses.

In addition, in another embodiment, the ribs of the side links are inserted into the mounting holes of the drive link and the side link and the drive link are first fastened, thereby reducing the friction between the connection pin, the drive link, and the side links that conventionally occurred in a curved section of an infinite trajectory. As this is excluded, it can be replaced by friction between the drive link and the side link. This has the effect of minimizing the phenomenon of gap widening due to frictional wear between the connection pin and links due to conventional friction, and maintaining relatively good tension of the chain.

In addition, while the side link performs the conventional abrasive attachment and cutting function, the adjacent drive links only perform the simple function of secondary fastening, so it can be manufactured in a smaller and simpler shape than the conventional side link, thereby reducing the weight of the chain saw. This has the effect of reducing the load on the chain saw engine and lowering the unit price of the chain saw.

In addition, the drive link is connected to the adjacent drive link to form a tooth groove and is engaged with the drive sprocket, which has the effect of stabilizing the drive of the overall chain by limiting the irregular actuation force that each drive link tries to move independently.

Meanwhile, in the repair kit, if the pivots of the drive link and side link become loose due to long-term use due to the influence of temperature in the working environment or due to improved tip durability, and the length of the chain increases, the link is removed by uncoupling the pivot. The repair kit of the present invention has the effect of extending its service life by simply replacing and removing/assembling it.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention along with the detailed description of the invention, so the present invention is limited only to the matters described in such drawings. It should not be interpreted as such.
Figure 1 is a perspective view schematically showing a typical chain saw.
Figures 2 and 3 are front views showing a portion of the chain of a conventional chain saw.
Figure 4a is a front view showing a portion of a chain assembled with a connecting link having a bumper protrusion in a pivot-coupled state of the inner and outer bushings according to the first embodiment of the present invention.
Figure 4b is a front view showing a portion of a chain assembled in a pivot-coupled state between links according to the first embodiment of the present invention.
Figure 5a is a cross-sectional view of the shaft coupling portion of Figure 4a.
Figure 5b is a cross-sectional view of the shaft coupling portion of Figure 4b.
Figure 6a is a front view showing a portion of the chain in a pivot-coupled state of the inner and outer bushings according to the second embodiment of the present invention.
Figure 6b is a front view showing a portion of the chain in a state of pivot coupling between links according to the second embodiment of the present invention.
Figure 7a is a cross-sectional view of the shaft coupling portion of Figure 6a.
Figure 7b is a cross-sectional view of the shaft coupling portion of Figure 6b.
Figure 8a is an enlarged cross-sectional view of the main part with the O-ring in the inner and outer bushing pivot coupled state added;
Figure 8b is an enlarged cross-sectional view of the main part with an O-ring added in a pivot-coupled state between links.
Figure 9a is an exploded perspective view of the chain in a pivot-coupled state between the inner and outer bushings of the first embodiment of the present invention, and Figure 9b is an exploded perspective view of the chain in a pivot-coupled state between links of the first embodiment of the present invention.
Figure 10a is an exploded perspective view of the chain in a pivot-coupled state between the inner and outer bushings of the second embodiment of the present invention, and Figure 10b is an exploded perspective view of the chain in a pivot-coupled state between links of the second embodiment of the present invention.
Figure 11a is a perspective view of a portion of the chain in a pivot-coupled state between the inner and outer bushings of the first embodiment of the present invention, and Figure 11b is a perspective view of a portion of the chain in a pivot-coupled state between links in the first embodiment of the present invention.
Figure 12a is a perspective view of a part of the chain in a state of pivot coupling between the inner and outer bushings of the second embodiment of the present invention, and Figure 12b is a perspective view of a part of the chain in a state of pivot coupling between links of the second embodiment of the present invention.
Figure 13 is a cross-sectional view of the pivot coupling state between links combined with the replacement kit of the present invention.

Hereinafter, with reference to the attached drawings, preferred embodiments will be described in detail so that those skilled in the art can easily practice the present invention. However, when explaining in detail the operating principle of a preferred embodiment of the present invention, if a detailed description of a related known function or configuration is judged to unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

In the present invention, uneven portions 140 that engage with adjacent drive links are formed on both sides of the drive link.

In addition, double bushings are placed on the inside and outside of the mounting hole where the drive link and the connection link are pivoted, so that they function as friction bearings, so that the wear friction between the pivot coupling axes due to the drive of the entire chain is relatively stable.

In addition, the main focus of the present invention is to stably couple the abrasive to the drive link and provide a replacement repair kit.

<First embodiment>

The chain of the chain saw according to the first preferred embodiment of the present invention is an example in which a sintered tip that handles materials such as concrete is attached to the upper part of the drive link.

This will be explained according to FIGS. 4A, 4B, 5A, 5B, and 9A, 9B.

The chain of the chain saw of the present invention is a chain link in which a drive link 100 with mounting holes formed on both sides and a pair of side links 200 with pinholes 210 formed on both sides are connected to each other by a connecting pin 300 to form a track. It consists of segments (hereinafter referred to as ‘chains’).

On both sides of the drive link, uneven portions 140 are formed to engage with adjacent drive links.

First, the drive link 100 is a link that cuts the workpiece by directly receiving power from the power source. This drive link 100 has an abrasive material mounted on the upper part, and is pin-connected to the lower part with a connecting pin 300 by a pair of side links 200 that overlap the drive link front and rear. .

In general, the chain of a chain saw is configured to cut the workpiece while rotating in an infinite trajectory by the front and rear sprockets.

At this time, the driving link of the chain is the driving link 100 equipped with a sintered tip 110A at the top.

Here, as a preferred example, a flat groove 121a is formed in the upper part 120 of the drive link 100 as shown in FIG. 9A. By forming the groove 121a, a locking protrusion 122 is formed at the upper front and rear ends.

The sintered tip has a structure that is appropriately restrained by the bottom surface of the groove 121a formed on the upper part of the drive link 100 and the locking protrusion 122.

The front and rear cross sections of the sintered tip are attached and fixed to the sintered tip 110A, which is formed to engage the locking protrusion 122 of the upper groove of the drive link 100.

This chain saw chain with a driving link attached to the sintered tip (110A) is used for cutting and cutting blocks and concrete structures such as walls and pillars.

<Second Embodiment>

The chain of the chain saw according to the second preferred embodiment of the present invention is an example in which a fusion tip for handling materials such as rebar and steel pipe is attached to the upper part of the drive link.

This will be explained with reference to FIGS. 6A, 6B, 7A, 7B, and 10A, 10B.

The upper part 120 of the drive link 100 is composed of a groove 121b having an overall gently convex curvature, unlike the groove 121a for coupling the sintered tip.

At least one coupling protrusion 123 may be formed in the groove 121b where the fusion tip 110B of the drive link is to be coupled.

Meanwhile, the abrasive is a fusion tip made by bonding diamond particles to a segment base.

This segment base has a groove 112 covering the groove 121b at the top of the drive link 100, and a coupling hole 113 into which the coupling protrusion 123 of the upper part 120 of the drive link 100 is inserted. It is formed of a driving link cap 114 having a channel-shaped cross section.

The fusion tip 110B, in which diamond powder 115 is fused to the upper surface of the drive link cap, is fused, electrodeposited, and It is made by combining fusion and electrodeposition (hereinafter referred to as “fusion tip”).

The front and rear cross sections of the driving link cap 114 of the fusion tip 110B are caught on the locking protrusion 122 of the groove 121b of the upper part 120 of the driving link 100, and the coupling hole 113 is located in the upper part 120. It is stably attached to the coupling protrusion 123 and maintains a more stable bonding force between the drive link and the tip, allowing good work to be performed in cutting metal structures such as cast carbon steel.

Meanwhile, the coupling hole 113 may be formed as a coupling groove.

Meanwhile, round-shaped protruding pieces 116 may be provided on both sides of the center of the driving link cap 114.

Therefore, the fixing force can be increased by increasing the area where the center and front and rear parts of the driving link cap 114 are coupled and fixed to the driving link 100, making it stable against work impact force.

In addition, since the driving link 100 and the driving link cap 114 are made of different materials, it is efficient to induce appropriate wear of the material during cutting operations.

Meanwhile, as a common structure between the first and second embodiments,

On both ends of the drive link 100, uneven portions 140 are formed that engage with the edges of adjacent drive links.

Although this is restricted by the connecting link when the chain is driven, it achieves cooperative linkage between the driving links.

Therefore, it prevents the workpiece from becoming caught due to independent intermittent irregular motion of the drive link.

Therefore, it has the effect of preventing loosening of the chain and resulting short circuit.

The drive link is generally a pentagonal plate and has a jaw between adjacent drive links to form a groove where the sprocket of the chain saw is caught.

On both sides of the drive link, concavo-convex portions that mesh with adjacent drive links are formed.

This is to achieve stable operation of the overall trajectory of the chain by interlocking the adjacent drive links 100 with each other by the concavo-convex portion 140 when the sprocket is driven by the operation of the chain saw.

And the drive link 100 is provided with mounting holes on both sides of the front,

The side link 200 has pinholes 210 machined on both sides of the front,

O-ring grooves 132 are formed around the front and rear surfaces of the mounting holes on both sides, and an O-ring 131 is inserted between the side links, which has the function of preventing the possibility of foreign substances intruding into the connection pin side just in case. .

For example, the width of the O-ring groove is 0.8 mm, the depth is 0.4 mm, and the diameter of the circular cross-section of the O-ring is about 0.4 mm.

Afterwards, when the side link is in contact with the drive link and fixed with a connection pin, the length between the wall of the side link and the bottom of the oil groove (132) of the drive link becomes about 0.25 mm, and at this time, the distance between the wall of the side link and the wall of the drive link is allowed. There is only a small gap (0.05mm), which is the tolerance.

Hereinafter, the pivot coupling according to the driving of the chain of the present invention will be described.

First, the following explains the pivot coupling method of the connection pin by the inner and outer bushings fitted on the concentric circle of the mounting hole 130a of the drive link, which is a preferred embodiment of the present invention. (See Figures 4a, 5a, 6a, 7a, 8a, 9a, 10a, 11a, 12a)

The mounting hole 130a of the drive link is formed as an oval hole and has a connecting pin 300 to the outer bushing 400A having an outer diameter corresponding to the outer bushing 400A and the circular inner bushing 400B having an outer diameter inserted into the inner diameter of the outer bushing. ) is pivot coupled.

Meanwhile, although not shown, the mounting hole 130a is a circular hole, and the outer bushing 400A can be integrally fixed to the hole by force fitting.

Additionally, a protrusion 440 is formed on one side of the inner bushing 400B, and a notch groove 240 is formed on the side link 200 at the corresponding position.

The inner and outer bushings are made of carbide or high hardness with wear resistance. It may be a material.

In the above example, the mounting hole 130a is a fine oval hole, but the mounting hole 130b pivoting with the rib of the connecting link is a circular hole.

This will explain how the rib 220 of the side link 200, which is inserted into the mounting hole 130b, which is a circular hole of the drive link 100, is pivot-coupled (Figs. 4b, 5b, 6b, 7b, 8b, 9b, 10b, 11b, 12b, 13)

A rib 220 is provided around the pinhole 210 on one side of the side link and is axially coupled to the inner diameter surface of the mounting hole 130b of the drive link.

This contributes to improving the durability of the chain saw by minimizing wear friction between drives of the chain saw by distributing the friction between the drive link and side link made of the same material, which is concentrated only on the connection pins made of relatively soft material.

As shown in FIGS. 4B and 6B, the drive link 100 may be manufactured so that one side of the side link 200 overlaps and the connection pin 300 passes through it. As shown in FIGS. 9B and 10B, the connection pin 300 penetrates the rib 220 of the side link 200 and the rib 220 of the side link 200 is inserted into the mounting hole 130b of the drive link 100. As the is pivot coupled, friction is generated between the drive link and the side link, which are relatively made of the same material, resulting in abrasion friction without significant resistance.

Here, the mounting hole 130b of the drive link 100 may be processed to have an inner diameter similar to the outer diameter of the rib 220 of the side link 200. Therefore, in the curved section of the infinite trajectory of the chain, the inner surface of the mounting hole 130b and the outer surface of the rib 220 are axially coupled to each other, as shown in FIG. 8b, to avoid friction with connection pins made of different materials. It works well.

Therefore, it is preferable that these drive links 100 and side links 200 are formed of high carbon tool steel having a hardness of HRC58 or higher.

Meanwhile, the side link 200 is a member that connects and fastens adjacent drive links 100. As shown in FIGS. 4B and 6B, one side of the side link 200 overlaps one drive link 100, and the other side overlaps the other drive link 100, and a connection pin 300 is provided at the overlapped portion. By being fixed through this, the side link 200 and the drive link 100 can be coupled. Additionally, the side link 200 may be disposed on both the left and right sides with the drive link 100 in between, as shown in FIGS. 5B and 7B. This side link 200 may be provided with pinholes 210 and ribs 220 on both sides, respectively, as shown in FIGS. 9B and 10B.

Here, pinholes 210 may be machined on both sides of the side link 200. This pinhole 210 is connected to the mounting hole 130b of the drive link 100 with a pair of side links 200 disposed with the drive link 100 in between, as shown in FIGS. 8B and 9B and 10B. It can be arranged to achieve concentricity. Additionally, the outer diameter of the rib 220 may be machined to a diameter slightly smaller than that of the mounting hole 130b.

In addition, the rib 220 is processed to protrude on one side of the side link 200 along the edge of the pinhole 210, as shown in FIGS. 9b and 10b, and has an outer diameter that is sufficient to generate friction when inserted into the mounting hole 130b. It has a hollow shape, and can be processed to a protruding height such that the ribs 220 on both left and right sides come into contact when inserted into the mounting hole 130b, as shown in FIG. 8b. At this time, the ribs 220 in the mounting hole 130b may be in contact with each other or may be spaced apart, or may be installed so that their distal ends overlap.

And the link in which the O-ring 131 is interposed in the O-ring groove 132 of the drive link 100 prevents foreign substances from entering the vicinity of the rib 220, that is, toward the connection pin 300, as shown in FIGS. 8a and 8b. It will have a function.

In other words, since the driving force of the chain sprocket first applies to the driving link 100 and this force is transmitted to the side link 200 and then to the connecting pin 300, the present invention is structured so that no significant force is applied to the connecting pin. .

Therefore, the length elongation due to chain operation is minimized due to friction between the high-strength link structures, and in particular, the friction between the outer surfaces of the ribs 220 and the connecting pins 300 of the side link 200 is significantly reduced, thereby reducing vulnerability. It has the effect of minimizing wear of connection pins.

In this way, friction occurring at the joint portion of the drive link 100, the side link 200, and the connection pin 300 may be limited to the drive link 100 and the side link 200.

Due to this structure, in the conventional structure, as shown in FIG. 3, the driving link 20, the side link 21, and the cutting link 23 are coupled to the connecting pin 22, the damage occurring in the curved section of the infinite trajectory Friction is concentrated on the connection pin 22, and deformation or damage of the connection pin 300 due to this concentrated friction can be prevented in advance.

In addition, due to the installation of abrasives on a pair of side links during chain driving work, the thickness of the abrasives is inevitably formed to be relatively unnecessarily thick, and this has the effect of achieving smooth driving by minimizing the phenomenon of vibration.

In the present invention, the connection pin 300 typically exemplifies a rivet.

However, if a rivet is lost in the field, a repair kit is provided for replacement as shown in Figure 13.

This is provided with a repair side link (200A) formed with a female thread portion 211 on the inner edge of the pinhole 210 of the side link 200, and is coupled to the female thread portion 211 instead of the connecting pin 300 coupled thereto. Allows replacement connection using bolts (300A).

The replacement kit requires removal of the unit due to abnormalities such as the tip of one of the drive links falling off or the chain stretching.

At this time, there are no replacement tools or devices on site.

Therefore, the screw fastening method is simple and easy to use and performs its function.

As described above, a person skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. Therefore, the above-described embodiments should be understood in all respects as illustrative and not restrictive. The scope of the present invention is indicated by the patent registration claims described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the patent registration claims and the equivalent concept should be interpreted as being included in the scope of the present invention. do.

100: Driving link 110A: Sintering tip
110B: Tip 112a, 112b: Home
113: Coupling groove 114: Driving link cap
115: diamond powder 116: protruding piece
117: catching part 120: upper part
121a, 121b: Groove 122: Locking jaw
123: Stumbling protrusion 130a: Mounting hole
130b: Mounting hole 131: O-ring
132: O-ring groove 140: Concave-convex portion
200: Side link 200A: Replacement side link
10: Pinhole 211: Female thread part
220: rib 230: sealing protrusion
240: Notch groove 300: Connecting pin
300A: bolt 400A: outer bushing,
400B: inner bushing 440: protrusion

Claims (13)

A drive link 100 with mounting holes on both sides and a pair of side links 200 with pinholes 210 on both sides are joined by a connecting pin 300 to form a chain link segment,
A chain of a chain saw, characterized in that an outer bushing having the same outer diameter of the oval hole is inserted into the mounting hole 130a, which is an oval hole of the drive link, and an inner bushing having an outer diameter inserted into the circular inner diameter of the outer bushing is coupled. . A drive link 100 with mounting holes on both sides and a pair of side links 200 with pinholes 210 on both sides are joined by a connecting pin 300 to form a chain link segment,
An outer bushing having an outer diameter that is forcibly coupled and fixed to the mounting hole is coupled to the mounting hole (130b), which is a circular hole of the drive link, and an inner bushing having an outer diameter that is inserted into the circular inner diameter of the outer bushing is coupled. Featured chainsaw chain. A drive link 100 with mounting holes on both sides and a pair of side links 200 with pinholes 210 on both sides are joined by a connecting pin 300 to form a chain link segment,
A chain saw characterized in that a rib 220 is protruding and coupled to the inner diameter surface of the mounting hole 130b of the drive link with a pin function around the pinhole 210 on the inner surface of the pair of side links 200. chain. The chain of claim 1 or 2, wherein a protrusion (440) is formed on one side of the inner bushing (400B), and a notch groove (240) is formed in the pinhole of the side link at the corresponding position. . According to any one of claims 1 to 3,
A chain saw chain, characterized in that uneven portions 140 are formed on both sides of the drive link 100 to engage with adjacent drive links. According to any one of claims 1 to 3,
A chain saw characterized in that a groove (121a) for coupling the sintered tip (110A) is formed so that a locking protrusion (122) is formed on the upper part of the driving link (100), and the sintered tip is attached and fixed thereto. According to any one of claims 1 to 3,
A chain saw characterized in that a groove (121b) having a gently convex arc is formed on the upper part of the drive link (100), and locking protrusions (122) are formed at the front and rear ends of the groove to which a fusion tip (110b) is coupled. . According to any one of claims 1 to 3,
A chain saw, characterized in that at least one engaging protrusion (123) is formed in the groove (121b) for coupling the fusion tip (110b) of the drive link (100). According to clause 8,
The fusion tip (110b) fixed to the groove (121b) is formed in a channel so that a groove (112) is formed that covers the bottom of the gently convex arc-shaped groove of the drive link (100) and the bottom and the front and rear walls of the drive link. A chain saw chain characterized in that diamond powder (115) is fused to the upper surface of a driving link cap (114) having a gently convex arc with a shaped cross-section. According to clause 9,
A chain saw chain, characterized in that a coupling hole 113 into which a locking protrusion 123 is inserted is formed at a certain position of the driving link cap 114. According to clause 9,
A chain saw chain, characterized in that round-shaped protruding pieces (116) are provided around the center of the driving link cap (114). According to claims 1 to 3,
In the drive link 100, an O-ring groove 132 with an O-ring 131 is formed on each of the front and rear surfaces of the mounting hole 130 machined on both sides of the front, and is covered with a pair of side links 200. Featured chainsaw chain. According to clause 3,
As a repair kit, it further includes a repair side link (200A) with a female thread portion (211) formed on the inner edge of the pinhole (210) of the side link (200), and a bolt (300A) coupled to the female thread portion (211). A chainsaw chain characterized by being made.