Stone sawing chain and connecting piece

Abstract

The stone sawing chain comprises middle guide teeth, a connecting assembly used for being connected with the middle guide teeth and a tool bit, the connecting assembly comprises two connecting pieces, the connecting pieces are connected with the two adjacent middle guide teeth through a pair of rivets, the tool bit is fixed to the connecting assembly, and the ends of the two rivets form two protruding riveting parts on the outer side faces of the connecting pieces; a convex rib located between the two riveting parts is arranged on the outer side face of the connecting piece, and the height of the convex rib is equal to that of the riveting parts; a distance L1 is reserved between the edge of the convex rib and the edge of the riveting part; the stone sawing chain and the connecting piece can reduce abrasion of the protruding riveting part and the outer surface of the connecting piece. And the service life of the saw chain is prolonged.

Description

Technical Field

[0001] The utility model relates to a saw chain, in particular to a stone saw chain and a connecting piece, which are mainly used for cutting concrete, stone, brick and the like. Background Art

[0002] Chain saws are used in many situations to cut bricks, stones, and concrete. For example, chainsaws are used to cut steel bars and concrete when moving buildings horizontally; to open doors and windows during renovation, to cut buildings for earthquake relief, and to cut stones during quarrying. The saw chain is the most important cutting component in the chain saw.

[0003] The diamond saw chain with the authorization publication number CN202241624U is composed of a diamond cutting piece, a connecting piece, and a transmission chain piece riveted together through a chain shaft.

[0004] A chain for a diamond chain saw with an authorization announcement number of CN101125446B comprises a chain base, a diamond segment, a connecting piece and a connecting shaft, wherein connecting holes are provided at both ends of the connecting piece, and base holes are provided at both ends of each chain base, and the connecting shaft is inserted through the connecting holes of the connecting piece, and the connecting shaft forms a raised riveted portion on the outer surface of the connecting piece;

[0005] When the existing saw chain is cutting stone, the stone will continuously wear the side of the saw chain. The worn parts of the saw chain are mainly concentrated on the raised riveted part of the connecting shaft and the surface of the connecting piece, which will reduce the service life of the saw chain. Utility Model Content

[0006] In view of this, the technical problem to be solved by the utility model is to provide a stone saw chain and a connecting piece which can reduce the wear of the raised riveted part and the outer surface of the connecting piece, thereby extending the service life of the saw chain.

[0007] The utility model solves the above technical problems by adopting the following technical solution: a saw stone chain comprises a middle guide tooth, a connecting assembly for connecting the middle guide tooth and a cutter head, the connecting assembly comprises two connecting pieces, the connecting piece connects two adjacent middle guide teeth through a pair of rivets, the cutter head is fixed on the connecting assembly, and the ends of the two rivets form two protruding riveted parts on the outer side of the connecting piece;

[0008] The outer side surface of the connecting piece is provided with a convex rib located between the two riveted parts, and the height of the convex rib is equivalent to the height of the riveted parts; a spacing L1 is left between the edge of the convex rib and the edge of the riveted parts.

[0009] A further preferred technical solution of the present invention is that the spacing L1 is not less than 0.5 mm.

[0010] A further preferred technical solution of the utility model is: the height of the convex rib is 0.15-0.3mm.

[0011] A further preferred technical solution of the utility model is that the cross section of the convex rib is circular, triangular or rectangular.

[0012] Another preferred subject: a saw stone chain, comprising a middle guide tooth, a connecting assembly for connecting the middle guide tooth, and a cutter head, wherein the connecting assembly comprises two connecting pieces, the connecting piece connects two adjacent middle guide teeth through a pair of rivets, the cutter head is fixed to the connecting assembly, and the ends of the two rivets form two protruding riveted portions on the outer side of the connecting piece;

[0013] The outer side surface of the connecting piece is provided with a convex rib located between the two riveted parts, the convex rib has a rib end surface and a rib peripheral side surface, the riveted part has a rivet end surface and a rivet peripheral side surface, and the rib end surface is substantially at the same height as the rivet end surface.

[0014] A further preferred technical solution of the utility model is: a first chamfer is provided between the rib end face and the rib peripheral side face, and a second chamfer is provided between the rivet end face and the rivet peripheral side face.

[0015] A further preferred technical solution of the present invention is: a spacing L1 is left between the edge of the rib and the edge of the riveted portion, and the spacing L1 is not less than 0.5 mm.

[0016] A further preferred technical solution of the utility model is: the height of the convex rib is 0.15-0.3 mm; the cross-section of the convex rib is circular, triangular or rectangular.

[0017] Another subject: A connecting piece, comprising a main body, wherein the main body has two rivet holes; a side surface of the main body has a convex rib, and a spacing L2 is left between the edge of the convex rib and the edge of the rivet hole; the height of the convex rib is 0.15-0.3 mm.

[0018] A further preferred technical solution of the present invention is that L2 is not less than 1 mm.

[0019] A further preferred technical solution of the utility model is: the convex rib has a rib end face and a rib peripheral side face, and a first chamfer is provided between the rib end face and the rib peripheral side face.

[0020] A further preferred technical solution of the utility model is that the cross section of the convex rib is circular, triangular or rectangular.

[0021] Compared with the prior art, the advantages of the utility model are: 1. Adding ribs on the outer surface of the connecting piece can reduce the contact and friction between the surface of the connecting piece and the cut object before the ribs wear, that is, the wear rate of the connecting piece is slowed down, which has a good effect on extending the service life of the connecting piece.

[0022] 2. The height of the rib is basically the same as the height of the rivet end face, which can share the wear of the rivet end face and at least extend the wear time of the rivet end face by a quarter, preventing the rivet end face from wearing too quickly and causing an uneven cutting surface, thereby preventing the saw stone chain from breaking due to premature grinding and failure of the rivet end face.

[0023] 3. It is conducive to the rapid and accurate distinction of the front and back sides of the connecting piece and the accurate and consistent arrangement of the direction during automated production, thereby promoting the improvement of production efficiency.

[0024] 4. After the connecting piece is provided with convex ribs, it can effectively prevent the connecting piece from sticking to each other during heat treatment, cleaning and surface treatment, which causes quality differences and improves the overall product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described object and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0026] Figure 1 The structure of the stone saw chain of the utility model is shown in FIG. Figure 1 ;

[0027] Figure 2 The structure of the stone saw chain of the utility model is shown in FIG. Figure 2 ;

[0028] Figure 3 The structure of the stone saw chain of the utility model is shown in FIG. Figure 3 ;

[0029] Figure 4 Schematic diagram of the overall structure of rivets and connecting pieces Figure 1 ;

[0030] Figure 5 Schematic diagram of the overall structure of rivets and connecting pieces Figure 2 ;

[0031] Figure 6 The overall structure of the connecting piece with convex ribs Figure 1 ;

[0032] Figure 7 The overall structure of the connecting piece with convex ribs Figure 2 . DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0034] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0035] like Figures 1 to 3 As shown, the saw stone chain 100 includes a middle guide tooth 10, a connecting assembly 20 for connecting the middle guide tooth 10, and a cutter head 30. The connecting assembly 20 includes two connecting plates 21. The connecting plate 21 connects two adjacent middle guide teeth 10 through a pair of rivets. The cutter head 30 is fixed to the connecting assembly 20. The ends of the two rivets form two protruding riveted portions t on the outer side of the connecting plate 21.

[0036] In order to address the problem of serious side wear of existing saw chains when cutting stone, by adding convex ribs v on the outer surface of the connecting piece 21, the contact and friction between the connecting piece 21 and the object to be cut can be effectively reduced before the convex ribs v are worn, thereby slowing down the wear rate of the connecting piece 21 and significantly extending its service life. The height of the convex rib v is basically the same as the height of the rivet end face, which can share the wear of the rivet end face, extend the wear time of the rivet end face, prevent the rivet end face from wearing too fast and causing an uneven cutting surface, and further avoid premature wear and failure of the rivet end face and cause the stone saw chain to break.

[0037] In addition, the convex rib v provided on the connecting sheet 21 facilitates the rapid and accurate distinction between the front and back sides of the connecting sheet and the accurate and consistent arrangement of directions during automated production, thereby improving production efficiency. Finally, the design of the convex rib v also effectively prevents the quality differences caused by the products sticking to each other during the heat treatment, cleaning and surface treatment of the connecting sheet 21, thereby improving the quality of the product as a whole.

[0038] Preferably, the connecting piece 21 is made of a highly wear-resistant material, such as high-strength alloy steel, or is surface hardened to further improve its wear resistance and service life.

[0039] In addition, preferably, a plurality of convex ribs v are added to the outer surface of the connecting piece 21, and their height is substantially consistent with the height of the rivet end surface. These convex ribs v can not only reduce the contact and friction between the surface of the connecting piece 21 and the object to be cut, but also further share the wear of the rivet end surface, thereby extending the service life of the rivet end surface.

[0040] Of course, the convex rib v can be designed into different shapes, such as round, square or strip, to optimize its wear resistance.

[0041] For the rivets, preferably, the rivets are made of special alloy materials and are surface hardened to increase their wear resistance and impact resistance.

[0042] Rivet designs can include anti-loosening features, such as thread locking designs or specially shaped rivet heads, to ensure that the rivet will not loosen in high-vibration environments.

[0043] like Figures 4 to 7 As shown, the outer side surface of the connecting piece 21 is provided with a convex rib v located between the two riveted portions t, and the height of the convex rib v is equivalent to the height of the riveted portion t. A spacing L1 is left between the edge of the convex rib v and the edge of the riveted portion t.

[0044] The height of the rib v is equivalent to the height of the riveted portion t, which can effectively share the lateral wear pressure on the saw chain during the cutting process. This means that when cutting stone, the rib v will first contact the object to be cut, reducing the chance of the surface of the connecting piece 21 directly contacting the stone, thereby slowing down the wear rate of the connecting piece 21.

[0045] The design of edge spacing L1 not less than 0.5mm ensures that the rib v and the riveted part t will not interfere with each other during wear, maintaining their respective functionality and integrity. Even during high-intensity cutting, this design can maintain a stable wear-resistant effect, thereby maintaining the overall stability of the saw chain.

[0046] The height of the rib is 0.15-0.3 mm. The height of the rib v is 0.15-0.3 mm, which is high enough to provide effective wear protection without significantly increasing the weight of the saw chain or affecting its flexibility. Through reasonable height design, the rib v can provide protection for a longer period of time, extending the service life of the connecting piece 21 and the riveted part t.

[0047] The convex rib v is gradually consumed during the wear process, but due to its reasonable design, it can maintain its protective function for a long time, thereby extending the service life of the entire saw chain.

[0048] In addition, the presence of the convex rib v makes it easier to distinguish the front and back sides and the direction of the connecting piece 21 during the production process, ensuring the accuracy and consistency of the assembly process. This not only improves production efficiency, but also reduces the possibility of assembly errors and improves production quality. Of course, the design of the convex rib v not only provides additional wear protection, but also maintains the stable cutting performance of the saw chain to a certain extent, improves the connection strength and ensures cutting quality.

[0049] In addition, preferably, the cross section of the convex rib v is circular, triangular or rectangular. Among them, the convex rib v with a circular cross section can evenly disperse stress and reduce stress concentration, thereby improving the fatigue resistance and durability of the convex rib v. The convex rib v with a triangular cross section has higher rigidity, can provide more stable support, slow down the vibration of the saw chain during the cutting process, and improve cutting accuracy and stability. The convex rib v with a rectangular cross section has a higher load-bearing capacity, can maintain structural integrity in a high-intensity cutting environment, and is not easy to deform or break.

[0050] The convex rib v has a rib end face v1 and a rib peripheral side face v2, and the riveted portion t has a rivet end face t1 and a rivet peripheral side face t2. The rib end face v1 and the rivet end face t1 are substantially at the same height.

[0051] The rib end face v1 and the rivet end face t1 are basically the same height, and the convex rib v and the riveted part t can evenly share the wear during the cutting process. This not only reduces the excessive wear of a single part, prolongs the service life of the entire saw chain, but also maintains the flatness and stability of the cutting surface. During the cutting process, they can jointly bear the impact load, disperse the impact force generated during cutting, reduce the stress concentration in a single part, thereby improving the impact resistance of the saw chain, and is suitable for various high-intensity cutting scenarios.

[0052] In addition, there is a first chamfer v3 between the rib end face v1 and the rib peripheral side face v2, and there is a second chamfer t3 between the rivet end face t1 and the rivet peripheral side face t2. The first chamfer v3 and the second chamfer t3 effectively reduce the stress concentration between the rib end face v1 and the rivet end face t1 and their respective peripheral side faces. The chamfer design can smoothly transition and disperse the stress during the cutting process, thereby preventing premature fatigue and fracture of the connecting piece and the riveted part.

[0053] The chamfer design increases the edge strength of the rib v and the riveted portion t, slowing down the wear rate. The chamfer provides a larger contact area, making the wear more uniform and extending the service life of the connecting piece 21 and the riveted portion t.

[0054] Preferably, a grid-like micro-groove or micro-convex point is designed in the chamfer area to form a uniform stress distribution and enhance the overall strength and durability of the chamfer. Micro-grooves refer to a series of fine grooves processed on the surface of the chamfer area. They can be linear, corrugated or grid-shaped.

[0055] Micro grooves guide chips and dust away from the contact surface during cutting, reducing debris accumulation and keeping the surface clean. This self-cleaning feature helps reduce friction and wear. These micro grooves can be created using precision machining techniques such as laser cutting, etching or micro milling.

[0056] Micro-bumps are a series of tiny raised points formed on the surface of the chamfered area. These bumps can be round, square or other geometric shapes. Micro-bumps can disperse the stress generated during cutting more evenly by increasing the contact area of ​​the surface, preventing the surface of the material from cracking or falling off due to stress concentration. In addition, the bumps can also reduce the friction between the surface and the object being cut, improving cutting efficiency. These micro-bumps can be achieved through processes such as electrospark machining (EDM), laser cladding or micro stamping.

[0057] For example, the groove depth can be set to 0.05mm to 0.2mm, and the spacing can be set to 0.1mm to 0.5mm. The specific parameters can be optimized according to the cutting material and the use environment. The height of the bumps can be set to 0.05mm to 0.2mm, and the density can be adjusted as needed to ensure the best stress dispersion and friction reduction effect.

[0058] Microstructures of this size are usually difficult to sense directly with fingers because they are smaller than the threshold of finger tactile perception. When the density of its arrangement is high, fingers can also feel each independent bump and groove, and there is tactile recognition.

[0059] like Figure 6 and Figure 7 As shown, the connecting piece 21 includes a body b, and the body b has two rivet holes b1; the body b, as the main body of the connecting piece 21, has sufficient strength to withstand the force during the cutting process, and the setting of the rivet holes b1 can effectively disperse the force. The reasonable arrangement of the connecting piece 21, the body b and the rivet holes b1 can effectively improve the processing accuracy and stability of the saw stone chain and reduce the vibration and noise generated by the saw chain during operation.

[0060] By ensuring the accurate positioning and firm connection of the connecting piece 21, the saw chain can have higher precision and stability during the cutting process, thereby improving the cutting efficiency and product quality.

[0061] One side of the body b has a convex rib v, and a spacing L2 is left between the edge of the convex rib v and the edge of the riveting hole b1. The larger spacing L2 provides more installation and maintenance space, making it easier for operators to install and maintain the connecting piece.

[0062] The spacing L2 is set to be no less than 1mm. This technical means can provide a larger tolerance for the manufacturing process. A larger spacing can reduce the difficulty of processing during the manufacturing process and improve the manufacturing accuracy and consistency of the connecting piece. In addition, the increase in the spacing L2 can promote the uniform distribution of stress between the rib v and the rivet hole b1, reduce local stress concentration, and a larger spacing can also reduce mutual interference between different structures, ensuring the stability and reliability of the connecting piece under high-load working conditions.

[0063] In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the utility model product is usually placed when in use, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. "First" and "second" are only for the purpose of making the description easier to understand, without any other directional meaning, and cannot be used as a limitation on the present utility model.

[0064] The above is an introduction to the stone saw chain and the connecting piece provided by the utility model. The principle and implementation method of the utility model are described in this article using specific examples. The description of the above embodiments is only used to help understand the utility model and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A stone saw chain, characterized in that: It includes a middle guide tooth, a connecting assembly for connecting the middle guide tooth, and a cutter head, wherein the connecting assembly includes two connecting plates, the connecting plates connect two adjacent middle guide teeth through a pair of rivets, the cutter head is fixed on the connecting assembly, and the ends of the two rivets form two protruding riveted parts on the outer side of the connecting plate; The outer side surface of the connecting piece is provided with a convex rib located between the two riveted parts, and the height of the convex rib is equivalent to the height of the riveted parts; a spacing L1 is left between the edge of the convex rib and the edge of the riveted parts.

2. The stone saw chain according to claim 1, characterized in that: The distance L1 is not less than 0.5 mm.

3. The stone saw chain according to claim 1, characterized in that: The height of the convex rib is 0.15-0.3 mm.

4. The stone saw chain according to claim 1, characterized in that: The cross section of the convex rib is circular, triangular or rectangular.

5. Stone saw chain, characterized in that: It comprises a middle guide tooth, a connecting assembly for connecting the middle guide tooth and a cutter head, wherein the connecting assembly comprises two connecting plates, the connecting plates connect two adjacent middle guide teeth through a pair of rivets, the cutter head is fixed on the connecting assembly, and the ends of the two rivets form two raised riveted parts on the outer side of the connecting plate; The outer side surface of the connecting piece is provided with a convex rib located between the two riveted parts, the convex rib has a rib end surface and a rib peripheral side surface, the riveted part has a rivet end surface and a rivet peripheral side surface, and the rib end surface is substantially at the same height as the rivet end surface.

6. The stone saw chain according to claim 5, characterized in that: A first chamfer is provided between the rib end surface and the rib peripheral side surface, and a second chamfer is provided between the rivet end surface and the rivet peripheral side surface.

7. The stone saw chain according to claim 5, characterized in that: A spacing L1 is left between the edge of the rib and the edge of the riveted portion, and the spacing L1 is not less than 0.5 mm.

8. The stone saw chain according to claim 5, characterized in that: The height of the convex rib is 0.15-0.3 mm; the cross section of the convex rib is circular, triangular or rectangular.

9. A connecting piece, characterized in that: It comprises a main body, which has two riveting holes; one side of the main body has a convex rib, and a distance L2 is left between the edge of the convex rib and the edge of the riveting hole; the height of the convex rib is 0.15-0.3mm.

10. The connecting sheet according to claim 9, characterized in that: The L2 is not less than 1 mm.

11. The connecting sheet according to claim 9, characterized in that: The convex rib has a rib end surface and a rib peripheral side surface, A first chamfer is provided between the rib end surface and the rib peripheral side surface.

12. The connecting sheet according to claim 9, characterized in that: The cross section of the convex rib is circular, triangular or rectangular.

Images