A wear-resistant saw chain for a chainsaw

Abstract

The utility model discloses a kind of wear-resistant saw chain of oil saw, comprising: oil saw body, the saw blade piece is equipped in the driving end of oil saw body, the saw blade piece includes guide plate and saw chain, the saw chain is around the outside of guide plate, and with the guide plate rotation is connected, the saw chain includes connecting unit and tool bit, the main cutting edge outer surface of tool bit is equipped with wear layer, the coverage area of wear layer on outer surface extends to the edge of chain link pin hole 0.5-1mm range, gradient transition layer is equipped in the wear layer, the volume fraction of superhard wear-resistant particle in gradient transition layer is increasing from inside to outside. The utility model is through the coverage range of gradient transition layer and setting wear layer, accurate protection, greatly prolongs service life, improves work efficiency, fundamentally solves the problem that frequent disassembly saw chain sends professional agency sharpening, single downtime is greater than or equal to 4 hours, seriously influence construction efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of chainsaws, specifically, it relates to a wear-resistant saw chain for a chainsaw. Background Technology

[0002] Traditional chainsaws or lithium-ion electric saws typically use high-carbon alloy steel blades that have undergone quenching and low-temperature tempering, achieving a hardness of 55-62 HRC. However, during wood cutting, the main cutting edge of the blade is subjected to severe friction and impact loads. Especially when cutting wood containing siliceous impurities (gravel) or iron nails, the blade edge shows wear and chipping of ≥0.2mm after an average of 200 hours of operation, resulting in a reduction in cutting efficiency of over 40%. Existing technologies can extend the lifespan to 300 hours through surface nitriding or carbide spraying, but these methods have two major drawbacks: the wear-resistant layer terminates 1.5mm beyond the pin hole, causing the stress-concentrated edge of the pin hole to become the preferential wear zone. The coating is mechanically bonded to the substrate, making it prone to chipping and peeling under impact loads. Users are forced to frequently disassemble and reassemble the chain for professional sharpening, with single downtime exceeding 4 hours, severely impacting construction efficiency. Utility Model Content

[0003] In view of this, the technical problem to be solved by this utility model is to provide a wear-resistant chainsaw chain that solves the problem of frequent chain disassembly and assembly and sending the chain to a professional institution for sharpening, resulting in a single downtime of ≥4 hours, which seriously affects construction efficiency.

[0004] To solve the above-mentioned technical problems, this utility model discloses a wear-resistant saw chain for a chainsaw, comprising: a chainsaw body, a saw blade component at the drive end of the chainsaw body, the saw blade component including a guide plate and a saw chain, the saw chain surrounding the guide plate and rotatably connected to the guide plate, the saw chain including a connecting unit and a cutter head, the outer surface of the main cutting edge of the cutter head being provided with a wear-resistant layer, the coverage area of ​​the wear-resistant layer on the outer surface extending to the edge of the chain link pin hole within a range of 0.5-1mm, the wear-resistant layer being provided with a gradient transition layer, the volume fraction of ultra-hard wear-resistant particles in the gradient transition layer increasing from the inside to the outside.

[0005] According to one embodiment of the present invention, the wear-resistant layer is formed by brazing a diamond particle layer, electroplating a diamond particle layer, sintering a diamond particle layer, or laser cladding.

[0006] According to one embodiment of the present invention, the coverage width of the wear-resistant layer on the front angle face of the main cutting edge is greater than the coverage width on the rear angle face.

[0007] According to one embodiment of the present invention, the surface Vickers hardness of the wear-resistant layer is ≥2000HV, and the bonding strength with the cutting head is ≥150MPa. According to one embodiment of the present invention, the cutter head is made of a high-carbon alloy with a carbon content of 0.6-1.2wt%.

[0008] Compared with the prior art, the present invention can achieve the following technical effects: 1) By using a gradient transition layer and setting the coverage of the wear-resistant layer, precise protection is provided, which greatly improves work efficiency and fundamentally solves the problem of frequent chain disassembly and assembly and sending the chain to a professional institution for sharpening, with a single downtime of ≥4 hours, which seriously affects construction efficiency.

[0009] Of course, any product implementing this utility model does not necessarily need to achieve all of the above-mentioned technical effects at the same time. Attached Figure Description

[0010] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the wear-resistant saw chain of a chainsaw according to an embodiment of the present invention.

[0011] Figure 2 This is an embodiment of the present utility model. Figure 1 Enlarged view of the cutter head.

[0012] Figure 3 This is an embodiment of the present utility model. Figure 1 Cross-sectional view of the cutter head.

[0013] Attached Figure Labels

[0014] Chainsaw body 10, saw blade 20, guide plate 21, chain 30, connecting unit 40, blade head 50, wear-resistant layer 60, gradient transition layer 70. Detailed Implementation

[0015] The following will describe in detail the implementation of this utility model with reference to the accompanying drawings and embodiments, so that the implementation of this utility model can be fully understood and carried out based on how technical means are used to solve technical problems and achieve technical effects.

[0016] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the wear-resistant saw chain of a chainsaw according to an embodiment of the present invention. Figure 2 This is an embodiment of the present utility model. Figure 1 Enlarged view of the cutter head. Figure 3 This is an embodiment of the present utility model. Figure 1A cross-sectional view of the central blade. As shown in the figure, a wear-resistant saw chain for a chainsaw includes: a chainsaw body 10, a saw blade component 20 at the drive end of the chainsaw body 10, the saw blade component 20 including a guide plate 21 and a chain 30, the chain 30 being wound around the guide plate 21 and rotatably connected to the guide plate 21, and the chain 30 including a connecting unit 40 and a blade head 50.

[0017] In one embodiment of this utility model, the chainsaw body 10 can also be a lithium-ion electric saw. A saw blade 20 is provided at the drive end of the chainsaw body 10 for cutting. The saw blade 20 includes a guide plate 21 and a chain 30. The chain 30 is wound around the guide plate 21 and rotatably connected to the guide plate 21 to perform cutting. Furthermore, the chain 30 includes a connecting unit 40 and a blade head 50. The blade head 50 is made of a high-carbon alloy with a carbon content of 0.6-1.2 wt%, thereby ensuring the overall strength, toughness, and impact resistance of the blade head 50. The connecting unit 40 is used to connect the blade head 50.

[0018] Furthermore, the outer surface of the main cutting edge of the cutter head 50 and the outer surface of the side guide surface are provided with a wear-resistant layer 60, and the coverage area of ​​the wear-resistant layer 60 on the side guide surface extends to the edge of the chain link pin hole within a range of 0.5-1mm.

[0019] In detail, a wear-resistant layer 60 is provided on the outer surface of the main cutting edge and the outer surface of the side guide surface of the cutter head 50. The surface Vickers hardness of the wear-resistant layer 60 is ≥2000HV, and the bonding strength with the cutter head 50 is ≥150MPa. The strength of the wear-resistant layer is maximized by the scratch test, thus providing enhanced wear resistance. This avoids the problem of frequently disassembling and assembling the chain 30 and sending it to a professional institution for sharpening, resulting in a single downtime of ≥4 hours, which seriously affects the construction efficiency. Secondly, by extending the coverage area of ​​the wear-resistant layer 60 on the side guide surface to within 0.5-1mm of the edge of the chain link pin hole, key areas such as the chain link pin control are strengthened, preventing the edge of the pin hole where stress concentration occurs from becoming the preferential wear zone. The coating and the substrate are mechanically bonded, making it prone to peeling under impact loads. This better blocks stress crack sources and simultaneously strengthens the cutting edge and guide surface, maximizing their overall strength and providing superior wear resistance. Furthermore, the coverage width W1 of the wear-resistant layer 60 on the front corner face of the main cutting edge is greater than the coverage width W2 on the rear corner face, and W1 / W2≥1.5 is satisfied. This is the optimal value obtained through wood testing, and this design achieves the best results.

[0020] Preferably, a gradient transition layer 70 is provided on the wear-resistant layer 60 side, and the volume fraction of ultra-hard wear-resistant particles in the gradient transition layer 70 increases from the inside to the outside.

[0021] In detail, a gradient transition layer 70 is provided on the inner side of the wear-resistant layer 60. The volume fraction of ultra-hard wear-resistant particles in the gradient transition layer 70 increases from 8% to 45% from the inside to the outside. The ultra-hard wear-resistant particles can be diamond particles, mainly to avoid interface stress concentration and better solve the problem of bonding strength.

[0022] Furthermore, the wear-resistant layer 60 is formed by brazing diamond particles, electroplating diamond particles, sintering diamond particles, or laser cladding. All four processes used to form the wear-resistant layer 60 have ultra-hard strength and are highly wear-resistant, solving the problem of frequent disassembly and assembly of the chain 30 requiring professional sharpening, resulting in a single downtime of ≥4 hours, which seriously affects construction efficiency.

[0023] Secondly, the blade can be coated with diamond on one side and diamond on the other, while the other side remains uncoated. During use, the coated side experiences almost no wear, while the uncoated side wears down, gradually revealing the diamond cutting edge, making it increasingly sharp and achieving an exceptionally long service life.

[0024] In summary, this utility model provides precise protection through the gradient transition layer 70 and the coverage of the wear-resistant layer 60, greatly improving work efficiency and fundamentally solving the long-standing pain point of "frequent sharpening shutdowns" in the chainsaw industry.

[0025] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A wear-resistant saw chain for a chainsaw, characterized in that, include: The chainsaw body has a saw blade assembly at its drive end. The saw blade assembly includes a guide plate and a saw chain. The saw chain surrounds the guide plate and is rotatably connected to it. The saw chain includes a connecting unit and a cutter head. The outer surface of the main cutting edge of the cutter head is provided with a wear-resistant layer. The coverage area of ​​the wear-resistant layer on the outer surface extends to the edge of the chain link pin hole within a range of 0.5-1mm. The wear-resistant layer is provided with a gradient transition layer, in which the volume fraction of ultra-hard wear-resistant particles increases from the inside to the outside.

2. The wear-resistant saw chain of the chainsaw according to claim 1, characterized in that, The wear-resistant layer is formed by brazing a diamond particle layer, electroplating a diamond particle layer, sintering a diamond particle layer, or laser cladding.

3. The wear-resistant saw chain of the chainsaw according to claim 1, characterized in that, The wear-resistant layer has a wider coverage width on the front angle face of the main cutting edge than on the rear angle face.

4. The wear-resistant saw chain of the chainsaw according to claim 1, characterized in that, The wear-resistant layer has a surface Vickers hardness ≥2000HV and a bonding strength with the cutting head ≥150MPa.

5. The wear-resistant saw chain of the chainsaw according to claim 1, characterized in that, The cutting head is made of a high-carbon alloy with a carbon content of 0.6-1.2wt%.

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