A diamond saw chain for reinforced concrete chain saw

Abstract

The present invention relates to a diamond saw chain for a reinforced concrete chain saw, comprising a plurality of chain links connected in sequence to form a ring, each chain link comprising a plurality of saw tooth units, the plurality of saw tooth units being arranged along the cutting direction of the saw chain. Each saw tooth unit comprises a plurality of diamond saw tooth blades, the plurality of diamond saw tooth blades being arranged along the thickness direction of the saw chain, the projections of the diamond saw tooth blades in their arrangement direction overlapping with each other, and the arrangement order of the plurality of diamond saw tooth blades in different saw tooth units in the same chain link is different. Each diamond saw tooth blade comprises a fixedly connected base portion and a cutter head portion, the top of each cutter head portion having at least two arc-shaped protruding teeth, with a recessed portion between adjacent protruding teeth. By providing a layered saw tooth unit and a wavy cutter head, the present invention reduces the resistance experienced by the saw teeth and saw chain during the cutting process, thereby improving the cutting efficiency and smoothness of the chain saw, and preventing the occurrence of chipped teeth or sudden breakage of the saw chain.

Description

Technical Field

[0001] The present invention relates to the technical field of diamond sawing tools, in particular to a diamond saw chain for a reinforced concrete chain saw. Background Art

[0002] At present, in the demolition construction projects of reinforced concrete buildings and fire rescue projects that require the demolition of buildings, the most commonly used demolition tool is the reinforced concrete chain saw. Compared with traditional circular saw blade cutting machines, the reinforced concrete chain saw is safer and more stable, and can perform deep cutting, sharp angle cutting and irregular shape cutting. In addition, the chain saw has less vibration during cutting, and the machine is relatively smaller, which is convenient for operation in small spaces. It is an ideal professional cutting tool, but the cutting speed of the chain saw is relatively low.

[0003] The cutting speed of reinforced concrete chain saws mainly depends on the matching diamond saw teeth and saw chain. At present, the main problems affecting the cutting speed of reinforced concrete chain saws are: on the one hand, since the teeth of ordinary diamond saw teeth are relatively thick, and the saw teeth are usually rectangular or trapezoidal in shape, they are mainly cut by grinding, and the cutting resistance is large, and the cutting efficiency is low; on the other hand, since the saw chain has a chain-like structure, it is easy to shake due to the influence of the reverse impact force during the cutting process, resulting in greater resistance on both sides of the saw teeth in the saw chain. Therefore, problems such as saw chain jamming and large speed fluctuations will occur during the cutting process, and the cutting feed is uneven and unstable, which will lead to reduced cutting efficiency of the chain saw.

[0004] In addition, other problems with reinforced concrete chain saws are: reinforced concrete chain saws are mostly hand-held. Due to the cutting resistance encountered by the diamond saw teeth during the grinding and cutting process, as well as the influence of forces such as resistance on both sides of the saw teeth and the saw chain, it is easy for the diamond saw teeth to break or the saw chain to suddenly break, causing the chain saw to malfunction, affecting the normal cutting work of the chain saw, and further reducing the cutting efficiency of the chain saw.

[0005] Therefore, in order to improve the cutting speed and cutting stability of the reinforced concrete chain saw and reduce chain saw failures, this solution improves its matching diamond saw teeth and saw chain. Summary of the Invention

[0006] In order to solve the above problems, the present invention provides a diamond saw chain for a reinforced concrete chain saw, which can effectively improve the cutting speed and cutting stability of the reinforced concrete chain saw and prevent the occurrence of tooth chipping or sudden saw chain breakage.

[0007] The technical solution adopted by the present invention is: a diamond saw chain for reinforced concrete chain saw, including a plurality of chain links connected in sequence to form a ring, each chain link includes a plurality of saw tooth units, and the plurality of saw tooth units are arranged along the cutting direction of the saw chain.

[0008] Each of the sawtooth units includes a plurality of diamond sawtooth plates. In the same sawtooth unit, the plurality of diamond sawtooth plates are arranged in a set order along the thickness direction of the saw chain. The projections of the diamond sawtooth plates in the arrangement direction overlap with each other, and there are gaps between adjacent diamond sawtooth plates. The sum of the dimensions of the diamond sawtooth plates and the gaps in the arrangement direction forms the overall thickness of the sawtooth unit and the saw chain.

[0009] In the same chain link, the arrangement order of the multiple diamond saw teeth in different saw tooth units along the thickness direction of the saw chain is different;

[0010] Each of the diamond serrated blades includes a base portion and a blade head portion that are connected to each other. The blade head portion is fixed to the top of the base portion. The top of the blade head portion of each diamond serrated blade has at least two protruding teeth. The top of each protruding tooth is in an arc shape. There is a recessed portion between two adjacent protruding teeth. The ratio between the distance h from the lowest point of the recessed portion to the bottom of the blade head portion and the overall height H of the blade head portion is in the range of 1:(1.8-2.2).

[0011] As a further limitation of the above technical solution, in the sawtooth unit, the arc radius R of the protruding tooth top of each cutter head is 0.5mm-2.5mm.

[0012] As a further limitation of the above technical solution, in each of the sawtooth units, the blade head of at least one of the diamond sawtooth blades is in a layered structure, and each layer in the layered structure is arranged along the thickness direction of the sawtooth unit and bonded and fixed.

[0013] As a further limitation of the above technical solution, each of the chain links includes two sawtooth units, each of the sawtooth units includes two diamond sawtooth plates, the two diamond sawtooth plates are A teeth and B teeth respectively, and the arrangement order of the A teeth and B teeth of the two sawtooth units is opposite.

[0014] The A tooth includes a first base portion and a first cutter head portion that are integrally connected. The first cutter head portion is fixed to the top of the first base portion. The first cutter head portion is an integral cutter head. The side of the first cutter head portion close to the B tooth is flush with the side of the first base portion close to the B tooth.

[0015] The B tooth includes a second base portion and a second cutting head portion that are integrally connected. The second cutting head portion has a layered structure, which is formed by bonding two thin cutting heads and a connector located between the two thin cutting heads. The projections of the thin cutting heads and the connector in the thickness direction of the sawtooth unit overlap with each other. The second cutting head portion is fixed to the top of the second base portion, and the connector is aligned with the center line of the second base portion.

[0016] As a further limitation of the above technical solution, the thickness of the first cutting head portion is 1.5-2 times the thickness of the first base portion, the overall thickness of the layered structure of the second cutting head portion is greater than the thickness of the second base portion, wherein the ratio of the thickness of the connector to the thickness of each of the thin cutting heads is 1:(1.1-1.3), and the ratio of the thickness of the connector to the thickness of the second base portion is 1:(1.2-1.3), and two connecting holes are provided on the first base portion and the second base portion, and the first base portion and the second base portion are connected by two connecting shafts, and each connecting shaft passes through a corresponding connecting hole on the first base portion and the second base portion.

[0017] As a further limitation of the above technical solution, the chain link also includes a middle guide plate and a connecting plate for connecting the two sawtooth units. Two connecting holes are also provided on the middle guide plate and the connecting plate, and auxiliary teeth are symmetrically arranged on both sides of the top of the connecting plate.

[0018] In the saw chain, every two connecting plates are connected to form a connecting plate unit by two connecting shafts. The saw tooth units and the connecting plate units are arranged one by one at intervals along the cutting direction of the saw chain. Adjacent saw tooth units and connecting plate units are also connected by a middle guide plate. The two connecting holes on each middle guide plate are respectively rotatably connected to a connecting shaft of the saw tooth unit and a connecting shaft of the connecting plate unit. The middle guide plates connected to each connecting shaft are located between the A tooth and the B tooth of a saw tooth unit, and between the two connecting plates of a connecting plate unit.

[0019] That is, in such a saw chain, each chain link specifically includes two saw tooth units, four middle guide plates and four connecting plates.

[0020] The present invention also proposes another technical solution relative to the above technical solution: the chain link also includes a middle guide plate for connecting the two serrated units, that is, this solution does not include a connecting plate, and the middle guide plate also has two connecting holes.

[0021] In the saw chain, every two saw tooth units are connected by a middle guide plate, and the two connecting holes on each middle guide plate are respectively rotatably connected to a connecting shaft of each saw tooth unit in the adjacent saw tooth units, and the middle guide plates connected to each connecting shaft are located between the A teeth and the B teeth of the saw tooth units.

[0022] The present invention also proposes another technical solution relative to the above technical solution: the chain link further includes a middle guide plate for connecting the two sawtooth units and two trapezoidal sawtooth units.

[0023] The trapezoidal sawtooth unit includes an A1 tooth and a B1 tooth arranged along the thickness direction of the saw chain, and the projections of the A1 tooth and the B1 tooth in the arrangement direction overlap with each other. The A1 tooth and the B1 tooth each include an integrally connected base portion and a cutter head portion. The cutter heads of the A1 tooth and the B1 tooth are respectively fixed to the top of their base portions. The tops of the cutter heads of the A1 tooth and the B1 tooth are both trapezoidal. The cutter head portion of the A1 tooth is an integral cutter head. The cutter head portion of the B1 tooth has a layered structure that is the same as the layered structure of the second cutter head portion. Two connecting holes are provided on the base portions of the A1 tooth and the B1 tooth. The base portions of the A1 tooth and the B1 tooth are connected by two connecting shafts, and each connecting shaft passes through a corresponding connecting hole on the base portions of the A1 tooth and the B1 tooth.

[0024] The saw tooth units and the trapezoidal saw tooth units are arranged one by one at intervals along the cutting direction of the saw chain, and in the same chain link, the arrangement order of the A1 teeth and the B1 teeth of the two trapezoidal saw tooth units is opposite.

[0025] Each of the middle guide plates also has two connection holes. In the saw chain, adjacent sawtooth units and trapezoidal sawtooth units are connected via a middle guide plate. The two connection holes on each middle guide plate are rotatably connected to a connecting shaft of the sawtooth unit and a connecting shaft of the trapezoidal sawtooth unit, respectively. The middle guide plates connected to each connecting shaft are located between teeth A and B of a sawtooth unit, and between teeth A1 and B1 of a trapezoidal sawtooth unit.

[0026] That is, in such a saw chain, each chain link specifically includes two saw tooth units, two trapezoidal saw tooth units and four middle guide plates.

[0027] As a further limitation of the above-mentioned technical solutions, the tops of the first blade head and the second blade head of the two serrated units in the chain link each have two protruding teeth.

[0028] Alternatively, another solution relative to the above technical solution is that the tops of the first blade head and the second blade head of the two serration units in the chain link each have three protruding teeth.

[0029] Alternatively, another solution relative to the above technical solution is that, in the two serrated units in the chain link, the tops of the first blade head and the second blade head of one serrated unit each have two protruding teeth, and the tops of the first blade head and the second blade head of the other serrated unit each have three protruding teeth.

[0030] The advantages of the present invention are as follows: by arranging a plurality of protruding teeth with arc top surfaces on the top of the cutter head, the present invention sets the blade teeth of each diamond saw blade and the saw tooth unit into a wavy shape, thereby reducing the contact area between the top of the saw tooth unit and the object to be cut, thereby reducing the resistance experienced by the saw tooth unit and the saw chain during the cutting process, and improving the cutting speed of the reinforced concrete chain saw; while the resistance experienced by the saw teeth and the saw chain is reduced, the vibration of the saw chain is also reduced accordingly, reducing the resistance experienced by both sides of the saw chain, and at the same time, the present invention also replaces the existing A teeth and B teeth by using a pair of teeth with a gap. The saw has thicker ordinary teeth commonly used in the art, and utilizes the lateral gap between teeth A and B so that during the cutting process, it can automatically make slight adjustments to the gap according to the pressure on both sides of the saw teeth, thereby further reducing the resistance on both sides of the saw teeth and the saw chain, thereby ensuring that the rotation speed of the saw chain remains as unchanged as possible during the cutting process, making the cutting feed speed more uniform and stable; in addition, the shape of the teeth on the top of the saw tooth unit is set to a wavy shape, which can avoid sudden changes in the resistance encountered by the teeth during the cutting process and the stress generated inside the teeth, thereby avoiding the problem of chipped teeth or saw chain breakage.

[0031] In the present invention, the combined connection mode of teeth A and B makes the blade heads of each saw tooth unit in the saw chain arranged in a sandwich-like layered structure. During the cutting process, a groove is formed between the teeth A and B due to the gap between the first blade head and the second blade head and the wear of the edges of the first blade head and the second blade head. Since the connector in the B tooth is more susceptible to wear than the thin blade heads on both sides, a groove is formed at the top of the B tooth between the two thin blade heads. The two grooves divide the cutting surface of the entire saw tooth unit into three parts. In this way, on the one hand, the area of ​​the cutting surface is reduced, the sharpness of the saw tooth unit is improved, and the cutting speed of the saw tooth unit and the saw chain is increased. On the other hand, the two grooves and the recessed portion between the two adjacent protruding teeth on the top of the blade head all have a certain depth and can also serve as chip removal channels. The powder and debris particles generated during the grinding and cutting process can be more easily discharged through these grooves and recessed portions, making the chip removal during the saw chain cutting process smoother, reducing the frictional resistance of the debris on the saw chain, and reducing the jamming phenomenon during the saw chain cutting process, which can further improve the cutting efficiency of the saw chain.

[0032] In the present invention, the teeth A and B in adjacent saw tooth units are arranged alternately left and right, so that the teeth A and B are evenly distributed left and right along the cutting direction in the entire saw chain, so that the entire saw chain is evenly stressed left and right, thereby ensuring that the direction of the saw chain remains stable during the cutting and feeding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of the overall structure of Example 1 of the diamond saw chain of the present invention;

[0034] Figure 2 Schematic diagram of the structure of a chain link in the diamond saw chain of Example 1;

[0035] Figure 3 for Figure 2 Cross-section view in the AA direction;

[0036] Figure 4 for Figure 2 Cross-section in the middle BB direction;

[0037] Figure 5 This is an exploded structural diagram of a chain link in the diamond saw chain of Example 1;

[0038] Figure 6 Schematic diagram of the structure of a sawtooth unit in the present invention;

[0039] Figure 7 Schematic diagram of the overall structure of Example 2 of the diamond saw chain of the present invention;

[0040] Figure 8 Schematic diagram of the structure of a chain link in the diamond saw chain of Example 2;

[0041] Figure 9 Schematic diagram of the overall structure of Example 3 of the diamond saw chain in the present invention;

[0042] Figure 10 Schematic diagram of the structure of a chain link in the diamond saw chain of Example 3;

[0043] Figure 11 This is an exploded structural diagram of a chain link in the diamond saw chain of Example 3;

[0044] Figure 12 Schematic diagram of the structure of a trapezoidal sawtooth unit in Example 3;

[0045] Figure 13 Schematic diagram of the structure of a diamond saw blade with two protruding teeth;

[0046] Figure 14 Schematic diagram of the structure of a diamond saw blade with three protruding teeth.

[0047] In the figure: 1-A tooth; 101-first base part; 102-first blade head; 2-B tooth; 201-second base part; 202-thin blade head; 203-connector; 3-connecting shaft; 4-middle guide plate; 5-connecting plate; 501-auxiliary tooth; 6-A1 tooth; 7-B1 tooth. DETAILED DESCRIPTION

[0048] The present invention will be further described in detail below with reference to the accompanying drawings and several specific embodiments of the diamond saw chain.

[0049] like Figure 1-14 As shown, the diamond saw chain for reinforced concrete chain saw includes a plurality of chain links sequentially connected in a ring shape, each chain link includes a plurality of saw tooth units, and the plurality of saw tooth units are arranged along the cutting direction of the saw chain.

[0050] Each sawtooth unit comprises multiple diamond serrations. Within a single sawtooth unit, the serrations are arranged in a layered structure along the thickness of the saw chain in a predetermined order. The projections of the serrations in the direction of their arrangement overlap, and gaps exist between adjacent serrations. The sum of the dimensions of the serrations and the gaps in the direction of their arrangement defines the overall thickness of the sawtooth unit and the saw chain. The sawtooth unit in this embodiment is equivalent to a single tooth in a conventional diamond saw chain.

[0051] In the same chain link, the arrangement order of the multiple diamond saw tooth pieces in different saw tooth units along the thickness direction of the saw chain is different.

[0052] Each diamond serration blade comprises an interconnected base and a blade head, which is fixed to the top of the base. Each diamond serration blade has at least two protruding teeth on the top of the blade head. Each tooth has an arc-shaped top, with a radius R of 0.5mm-2.5mm. A recessed portion is located between adjacent teeth. The ratio of the distance h from the lowest point of the recess to the bottom of the blade head to the overall height H of the blade head is in the range of 1:(1.8-2.2).

[0053] In each sawtooth unit, the blade head of at least one diamond sawtooth piece also presents a layered structure, and each layer in the layered structure is arranged along the thickness direction of the sawtooth unit and bonded and fixed.

[0054] In the present invention, the specific number of the multiple sawtooth units included in each chain link can be two, three, or more, and the specific number of the multiple diamond sawtooth blades included in each sawtooth unit can also be two, three, or more. Furthermore, the multiple diamond sawtooth blades in each sawtooth unit in each chain link are arranged in a different order along the thickness direction of the saw chain. This is so that the gaps between adjacent diamond sawtooth blades in each sawtooth unit can be staggered in the cutting direction of the saw chain. In adjacent sawtooth units, a certain gap position in one sawtooth unit corresponds to a certain tooth position in another sawtooth unit as much as possible. This ensures that during the cutting process, the saw chain will not have any uncuttable positions in the thickness direction of the saw chain, leaving no dead angles for cutting.

[0055] Specific embodiment 1 of the diamond saw chain of the present invention:

[0056] like Figure 1-6As shown, in the diamond saw chain, each link includes two sawtooth units, and each sawtooth unit includes two diamond sawtooth plates, namely tooth A 1 and tooth B 2. In the same link, the arrangement order of tooth A 1 and tooth B 2 of the two sawtooth units is opposite.

[0057] Tooth A 1 includes a first base portion 101 and a first cutting head portion 102 that are integrally connected. The first cutting head portion 102 is fixed to the top of the first base portion 101. The first cutting head portion 102 is an integral cutting head, and its thickness is 1.5-2 times the thickness of the first base portion 101. The side of the first cutting head portion 102 close to the tooth B 2 is flush with the side of the first base portion 101 close to the tooth B 2.

[0058] The B tooth 2 includes an integrally connected second base portion 201 and a second cutting head portion. The second cutting head portion has a layered structure, formed by bonding two thin cutting heads 202 and a connector 203 located between the two thin cutting heads. The projections of the thin cutting heads 202 and the connector 203 in the thickness direction of the sawtooth unit overlap. The second cutting head portion is fixed to the top of the second base portion 201, and the connector 203 is aligned with the centerline of the second base portion 201. The overall thickness of the layered structure of the second cutting head portion is greater than the thickness of the second base portion 201. The ratio of the thickness of the connector 203 to the thickness of each thin cutting head 202 is 1:(1.1-1.3), and the ratio of the thickness of the connector 203 to the thickness of the second base portion 201 is 1:(1.2-1.3).

[0059] In this embodiment, the tops of the first and second blade sections 102 and 201 have the same tooth profile, the first and second base sections 101 and 201 have the same shape, and both have two connection holes. The first and second base sections 101 and 201 are made of 30CrMo alloy steel. The two thin blades 202 in the first and second blade sections 102 and 201 are each a composite matrix formed by pressing and sintering a mixture of metal powder and diamond particles. The connector 203 between the two thin blades in the second blade section does not contain diamond particles but is simply a matrix formed by sintering metal powder. Therefore, during the cutting process, the top of the connector 203 is more susceptible to wear than the tops of the two thin blades 202. The metal powder in the first and second blade sections 102 and 201 is a mixed metal powder of Fe, Cu, Sn, Ni, Co, Cr, etc.

[0060] In this embodiment, the first base portion 101 and the first cutter head portion 102, and the second base portion 201 and the second cutter head portion are all connected together by laser welding. The present invention uses a laser welding process to make the weld strength between the cutter head and the base portion higher in reliability and safety than conventional brazing processes.

[0061] like Figure 2 and Figure 5 As shown, in the chain link of this embodiment, the tops of the first blade head 102 and the second blade head of the two serration units each have two protruding teeth.

[0062] However, in other embodiments of the present invention, in the same chain link, the number of protruding teeth on the top of the first blade head 102 and the second blade head of the two sawtooth units can also be 3 or more. For example, the shape of the diamond sawtooth blade with 3 protruding teeth is as follows: Figure 14 shown.

[0063] In other embodiments of the present invention, the number of protruding teeth on the tops of two sawtooth units in the same chain link may also be different. For example, one sawtooth unit in the same chain link may have two protruding teeth on the tops of the first blade section 102 and the second blade section, while the other sawtooth unit may have three protruding teeth on the tops of the first blade section 102 and the second blade section.

[0064] like Figure 13 As shown, when the top of the blade head of the diamond saw blade has two protruding teeth, the ratio between the arc radius size R of the top of the protruding tooth and the overall height H of the blade head is in the range of 1:(2.1-2.6); the ratio between the distance h from the lowest point of the recessed portion to the bottom of the blade head and the overall height H of the blade head is in the range of 1:(2.0-2.2).

[0065] like Figure 14 As shown, when the top of the blade head of the diamond saw blade has three protruding teeth, the ratio between the arc radius size R of the top of the protruding tooth and the overall height H of the blade head is in the range of 1:(3.0-3.5); the ratio between the distance h from the lowest point of the recessed portion to the bottom of the blade head and the overall height H of the blade head is in the range of 1:(1.8-2.0).

[0066] For example, in the diamond saw blades currently produced by enterprises according to the technical solution of the present invention, the blade head has two protruding teeth on the top of the blade head, the width dimension of the blade head is L13.5mm, the overall height dimension H is 6.5mm, the arc radius dimension R of the top of the protruding teeth is 2.5mm, and the distance h from the lowest point of the recessed part to the bottom of the blade head is 3mm; the blade head has three protruding teeth on the top of the blade head, the width dimension of the blade head is L13.5mm, the overall height dimension H is 6.5mm, the arc radius dimension R of the top of the protruding teeth is 2.0mm, and the distance h from the lowest point of the recessed part to the bottom of the blade head is 3.5mm.

[0067] like Figure 6As shown, the sawtooth unit in this embodiment further includes a connecting shaft 3. In the same sawtooth unit, the first base portion 101 and the second base portion 201 are connected by two connecting shafts 3, and each connecting shaft 3 passes through a corresponding connecting hole on the first base portion 101 and the second base portion 201.

[0068] like Figure 2 and Figure 5 As shown, the chain link in this embodiment includes, in addition to the two sawtooth units, four intermediate guide plates 4 and four connecting plates 5 for connecting the two sawtooth units. The intermediate guide plates 4 and connecting plates 5 also have two connecting holes, and auxiliary teeth 501 are symmetrically arranged on both sides of the top of the connecting plates 5.

[0069] In the diamond saw chain of this embodiment, every two connecting plates 5 are connected to form a connecting plate unit through two connecting shafts 3. The saw tooth units and the connecting plate units are arranged one by one in the cutting direction of the saw chain. Adjacent saw tooth units and connecting plate units are also connected by a middle guide plate 4. The two connecting holes on each middle guide plate 4 are respectively rotatably connected to a connecting shaft 3 of the saw tooth unit and a connecting shaft 3 of the connecting plate unit. The middle guide plate 4 connected to each connecting shaft 3 is located between the A tooth 1 and the B tooth 2 of a saw tooth unit, and between the two connecting plates 5 of a connecting plate unit.

[0070] In the present invention, a connecting piece unit is provided, and auxiliary teeth 501 are provided on the top of the connecting piece 5 to buffer the reverse impact force and cutting resistance experienced by the A-tooth and B-tooth cutter heads, thereby reducing the vibration of the chain saw. While protecting the A-tooth and B-tooth cutter heads, the cutting speed and cutting stability of the chain saw can also be further improved.

[0071] The working principle of the diamond saw chain in this embodiment is:

[0072] 1. By providing multiple protruding teeth with arc-shaped top surfaces on the top of the cutter head, the teeth of each diamond saw blade and saw unit are set to a wavy shape, which reduces the contact area between the top of the saw unit and the object to be cut. This reduces the resistance experienced by the saw unit and saw chain during the cutting process, thereby increasing the cutting speed of the reinforced concrete chain saw.

[0073] 2. While the resistance to the saw teeth and saw chain is reduced, the vibration of the saw chain is also reduced accordingly, reducing the resistance on both sides of the saw chain. At the same time, the present invention also replaces the thicker ordinary saw teeth commonly used in the prior art by using paired A teeth and B teeth with a gap. The transverse gap between the A teeth and B teeth is utilized to automatically make slight adjustments to the gap according to the pressure on both sides of the saw teeth during the cutting process, thereby further reducing the resistance on both sides of the saw teeth and saw chain, thereby ensuring that the saw chain rotation speed remains as constant as possible during the cutting process, making the cutting feed speed more uniform and stable.

[0074] 3. The shape of the teeth on the top of the sawtooth unit is set to a wave shape, which can avoid the resistance encountered by the teeth during the cutting process and the sudden change of stress generated inside the teeth, thereby avoiding the problem of broken teeth or saw chain breakage;

[0075] 4. In the present invention, the combined connection of teeth A and B allows the blade heads of each saw tooth unit in the saw chain to be arranged in a sandwich-like layered structure. During the cutting process, a groove is formed between the teeth A and B due to the gap between the first and second blade heads and the wear of the edges of the first and second blade heads. Furthermore, because the connector in the B tooth is more susceptible to wear than the thin blade heads on both sides, a groove is formed at the top of the B tooth between the two thin blade heads. These two grooves divide the cutting surface of the entire saw tooth unit into three parts. This, on the one hand, reduces the area of ​​the cutting surface, improves the sharpness of the saw tooth unit, and increases the cutting speed of the saw tooth unit and the saw chain.

[0076] 5. The two grooves and the recessed portion between two adjacent protruding teeth on the top of the cutter head are all designed to have a certain depth. Within this depth range, the cutting strength of the cutter head can be guaranteed while also serving as a chip removal channel. Powder and debris particles generated during the grinding and cutting process can be more easily discharged through these grooves and recessed portions, making chip removal smoother during the saw chain cutting process, reducing the frictional resistance of the debris on the saw chain, and also reducing the jamming phenomenon during the saw chain cutting process, which can further improve the cutting efficiency of the saw chain.

[0077] 6. In the present invention, the teeth A and B in adjacent saw tooth units are arranged alternately on the left and right sides, and the teeth A and B in the entire saw chain are evenly distributed on the left and right sides along the cutting direction, so that the entire saw chain is evenly stressed on the left and right sides, which can further ensure that the direction of the saw chain remains stable during the cutting and feeding process.

[0078] Specific embodiment 2 of the diamond saw chain of the present invention:

[0079] like Figure 7 and 8 As shown, the diamond saw chain for a reinforced concrete chain saw comprises a plurality of chain links connected in sequence to form a ring. In addition to having two saw tooth units as in Example 1, each chain link also includes a middle guide piece 4 for connecting the two saw tooth units, which is the same as in Example 1. Each chain link includes two middle guide pieces 4, but does not include the connecting piece 5 and connecting piece unit as in Example 1.

[0080] In the diamond saw chain of this embodiment, every two saw tooth units are connected by a middle guide plate 4, and the two connecting holes on each middle guide plate 4 are respectively rotatably connected to a connecting shaft 3 of each saw tooth unit in the adjacent saw tooth units, and the middle guide plates 4 connected to each connecting shaft 3 are all located between the A tooth 1 and the B tooth 2 of the saw tooth unit.

[0081] Compared with Example 1, the working principle of the diamond saw chain in this embodiment is as follows:

[0082] On the basis of Example 1 of the saw chain, Example 2 removes the connecting piece unit in the saw chain, and uses the saw tooth units and the middle guide piece 4 to link into a ring in the entire saw chain, which is equivalent to increasing the number of the first blade section 102 and the second blade section 202 in the chain saw, thereby increasing the grinding efficiency of the chain saw on the object to be cut, and thus improving the cutting speed of the saw chain in Example 2.

[0083] Specific embodiment 3 of the diamond saw chain in the present invention:

[0084] like Figure 9-12 As shown, the diamond saw chain for reinforced concrete chain saws includes a plurality of chain links connected in sequence to form a ring. In each chain link, in addition to the two saw tooth units and four middle guide plates 4 that are the same as those in Example 1, it also includes two trapezoidal saw tooth units. At the same time, similar to Example 2, it does not include the connecting plate 5 and connecting plate unit that are included in Example 1.

[0085] The trapezoidal sawtooth unit includes an A1 tooth 6 and a B1 tooth 7 arranged along the thickness direction of the saw chain. The projections of the A1 tooth 6 and the B1 tooth 7 in the arrangement direction overlap with each other. The A1 tooth 6 and the B1 tooth 7 each include an integrally connected base portion and a cutter head portion. The cutter heads of the A1 tooth 6 and the B1 tooth 7 are respectively fixed to the top of their base portions. The tops of the cutter heads of the A1 tooth 6 and the B1 tooth 7 are both trapezoidal. The cutter head of the A1 tooth 6 is a single integral cutter head. The cutter head of the B1 tooth 7 has a layered structure identical to that of the second cutter head portion. (Here, "identical to the layered structure of the second cutter head portion" only means that the number of layers of the layered structure is the same, the arrangement order of the layers is the same, and the thickness and material of the layers are the same. It does not include the same tooth shape at the top of each layer.)

[0086] Two connecting holes are provided on the base of the A1 tooth 6 and the B1 tooth 7. The base of the A1 tooth 6 and the B1 tooth 7 are connected by two connecting shafts 3. Each connecting shaft 3 passes through a corresponding connecting hole on the base of the A1 tooth 6 and the B1 tooth 7.

[0087] In the diamond saw chain of this embodiment, the sawtooth units and the trapezoidal sawtooth units are arranged one by one at intervals along the cutting direction of the saw chain. Adjacent sawtooth units and trapezoidal sawtooth units are connected by a middle guide piece 4. The two connecting holes on each middle guide piece 4 are respectively rotatably connected to a connecting shaft 3 of the sawtooth unit and a connecting shaft 3 of the trapezoidal sawtooth unit. The middle guide pieces 4 connected to each connecting shaft 3 are located between the A tooth 1 and the B tooth 2 of a sawtooth unit, and between the A1 tooth 6 and the B1 tooth 7 of a trapezoidal sawtooth unit.

[0088] In the same chain link of this embodiment, the arrangement order of the A1 teeth 6 and the B1 teeth 7 of the two trapezoidal sawtooth units is opposite.

[0089] Compared with Example 1, the working principle of the diamond saw chain in this embodiment is as follows:

[0090] On the basis of Example 1 of the saw chain, in Example 3, a trapezoidal serration unit is used to replace the connecting piece unit in the saw chain. All the serration units and the trapezoidal serration units are linked into a ring by the middle guide piece 4. The serration units and the trapezoidal serration units in the entire saw chain can be used to cut reinforced concrete, which is equivalent to increasing the number of blades that can be used for cutting in the entire chain saw, thereby increasing the grinding efficiency of the chain saw on the object to be cut, and thus improving the cutting speed of the saw chain in Example 3.

[0091] In addition, although the trapezoidal sawtooth unit mainly cuts reinforced concrete by grinding, there is a sharp corner on the top of the trapezoidal blade of the trapezoidal sawtooth unit. During the cutting process, the corner position is used to cut the reinforced concrete by impact breaking the rock from the perspective of the rock breaking mechanism. The cutting force of impact breaking is greater than the cutting force of grinding, and the cutting speed is greater than the cutting speed of grinding, so the overall cutting efficiency of the sawtooth unit and the saw chain is improved.

[0092] Therefore, the diamond saw chain in Example 3 can be mainly used in reinforced concrete structures with complex internal structures or steel bars of different diameters. Compared with the diamond saw chain in Example 1, the diamond saw chain in Example 3 can reduce saw jamming and speed slowdown when cutting such reinforced concrete structures. Compared with Example 1, the cutting effect of Example 3 is better, and the cutting speed and cutting efficiency are higher.

[0093] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technical solution obtained by any technician familiar with the field within the technical scope disclosed by the present invention and by equivalent replacement or modification based on the technical concept of the present invention should be covered by the scope of protection of the present invention.

Claims

1. A diamond saw chain for reinforced concrete chainsaw, characterized by: The saw chain comprises a plurality of chain links connected in sequence to form a ring, each chain link comprises a plurality of saw tooth units, and the plurality of saw tooth units are arranged along the cutting direction of the saw chain; Each of the sawtooth units comprises a plurality of diamond sawtooth blades. In the same sawtooth unit, the plurality of diamond sawtooth blades are arranged in a set order along the thickness direction of the saw chain. The projections of the diamond sawtooth blades in the arrangement direction overlap with each other, and there are gaps between adjacent diamond sawtooth blades. The sum of the dimensions of the diamond sawtooth blades and the gaps in the arrangement direction constitutes the overall thickness of the sawtooth unit and the saw chain. In the same chain link, the arrangement order of the multiple diamond saw teeth in different saw tooth units along the thickness direction of the saw chain is different; Each of the diamond serrated blades includes a base portion and a cutter head portion connected to each other, the cutter head portion being fixed to the top of the base portion, the cutter head portion of each diamond serrated blade having at least two protruding teeth on the top of the cutter head portion, the top of each protruding tooth being in an arc shape, a recessed portion being provided between two adjacent protruding teeth, and the ratio of the distance h between the lowest point of the recessed portion and the bottom of the cutter head portion to the overall height H of the cutter head portion being in the range of 1:(1.8-2.2); In each of the sawtooth units, the blade head of at least one of the diamond sawtooth blades is in a layered structure, and each layer in the layered structure is arranged along the thickness direction of the sawtooth unit and bonded and fixed; The number of sawtooth units included in each of the chain links is two, the number of diamond sawtooth plates included in each of the sawtooth units is two, the two diamond sawtooth plates are respectively teeth A (1) and teeth B (2), and the arrangement order of the teeth A (1) and teeth B (2) of the two sawtooth units is opposite; The A tooth (1) comprises a first base portion (101) and a first cutting head portion (102) connected in one piece, the first cutting head portion (102) being fixed to the top of the first base portion (101), the first cutting head portion (102) being an integral cutting head, and the side surface of the first cutting head portion (102) close to the B tooth (2) being flush with the side surface of the first base portion (101) close to the B tooth (2); The B tooth (2) comprises a second base portion (201) and a second cutting head portion which are integrally connected. The second cutting head portion is a layered structure formed by bonding two thin cutting heads (202) and a connecting body (203) located between the two thin cutting heads. The projections of the thin cutting heads (202) and the connecting body (203) in the thickness direction of the sawtooth unit overlap with each other. The second cutting head portion is fixed to the top of the second base portion (201), and the connecting body (203) is aligned with the center line of the second base portion (201).

2. The diamond saw chain for reinforced concrete chainsaw according to claim 1, characterized in that: In the sawtooth unit, the arc radius R of the protruding tooth top of each cutter head is 0.5mm-2.5mm.

3. The diamond saw chain for reinforced concrete chainsaw according to claim 1, characterized in that: The thickness of the first blade head (102) is 1.5-2 times the thickness of the first base part (101), and the overall thickness of the layered structure of the second blade head is greater than the thickness of the second base part (201), wherein the thickness ratio of the connector (203) to the thickness of each thin blade head (202) is 1:(1.1-1.3), and the thickness ratio of the connector (203) to the thickness of the second base part (201) is 1:(1.2-1.3), and two connecting holes are respectively provided on the first base part (101) and the second base part (201), and the first base part (101) and the second base part (201) are connected by two connecting shafts (3), and each connecting shaft (3) passes through a corresponding connecting hole on the first base part (101) and the second base part (201).

4. The diamond saw chain for reinforced concrete chainsaw according to claim 3, characterized in that: The chain link further comprises a middle guide piece (4) and a connecting piece (5) for connecting the two sawtooth units. The middle guide piece (4) and the connecting piece (5) are both provided with two connecting holes. Auxiliary teeth (501) are symmetrically provided on both sides of the top of the connecting piece (5). In the saw chain, every two connecting pieces (5) are connected to form a connecting piece unit by two connecting shafts (3), the saw tooth units and the connecting piece units are arranged one by one at intervals along the cutting direction of the saw chain, and adjacent saw tooth units and connecting piece units are connected by a middle guide piece (4), and two connecting holes on each middle guide piece (4) are respectively rotatably connected to a connecting shaft (3) of the saw tooth unit and a connecting shaft (3) of the connecting piece unit, and the middle guide piece (4) connected to each connecting shaft (3) is located between the A tooth (1) and the B tooth (2) of a saw tooth unit, and between the two connecting pieces (5) of a connecting piece unit.

5. The diamond saw chain for reinforced concrete chainsaw according to claim 3, characterized in that: The chain link also includes a middle guide piece (4) for connecting the two sawtooth units, and the middle guide piece (4) is also provided with two connection holes; In the saw chain, each two saw tooth units are connected via a middle guide piece (4), and the two connection holes on each middle guide piece (4) are respectively rotatably connected to a connection shaft (3) of each saw tooth unit in the adjacent saw tooth units, and the middle guide piece (4) connected to each connection shaft (3) is located between the A tooth (1) and the B tooth (2) of the saw tooth unit.

6. The diamond saw chain for reinforced concrete chainsaw according to claim 3, characterized in that: The chain link also includes a middle guide piece (4) for connecting the two sawtooth units and two trapezoidal sawtooth units; The trapezoidal saw tooth unit comprises an A1 tooth (6) and a B1 tooth (7) arranged along the thickness direction of the saw chain, the projections of the A1 tooth (6) and the B1 tooth (7) in the arrangement direction overlap with each other, the A1 tooth (6) and the B1 tooth (7) each comprise a base portion and a cutter head portion connected as one piece, the cutter heads of the A1 tooth (6) and the B1 tooth (7) are respectively fixed to the top of their base portions, the tops of the cutter heads of the A1 tooth (6) and the B1 tooth (7) are both trapezoidal, the The cutter head of the A1 tooth (6) is an integral cutter head, and the cutter head of the B1 tooth (7) has a layered structure identical to that of the second cutter head. Two connecting holes are provided on the bases of the A1 tooth (6) and the B1 tooth (7). The bases of the A1 tooth (6) and the B1 tooth (7) are connected via two connecting shafts (3), and each connecting shaft (3) passes through a corresponding connecting hole on the bases of the A1 tooth (6) and the B1 tooth (7). The saw tooth units and the trapezoidal saw tooth units are arranged one by one in a cutting direction of the saw chain, and in the same chain link, the arrangement order of the A1 teeth (6) and the B1 teeth (7) of the two trapezoidal saw tooth units is opposite; The middle guide piece (4) is also provided with two connection holes; in the saw chain, adjacent saw tooth units and the trapezoidal saw tooth units are connected via a middle guide piece (4), the two connection holes on each middle guide piece (4) are rotatably connected to a connection shaft (3) of the saw tooth unit and a connection shaft (3) of the trapezoidal saw tooth unit, respectively, and the middle guide piece (4) connected to each connection shaft (3) is located between the A tooth (1) and the B tooth (2) of a saw tooth unit, and between the A1 tooth (6) and the B1 tooth (7) of a trapezoidal saw tooth unit.

7. A diamond saw chain for a reinforced concrete chain saw according to any one of claims 4 to 6, characterized in that: The tops of the first cutting head (102) and the second cutting head of the two sawtooth units in the chain link are both provided with 2 or 3 protruding teeth.

8. A diamond saw chain for a reinforced concrete chain saw according to any one of claims 4 to 6, characterized in that: The two sawtooth units in the chain link each have two protruding teeth on the top of the first blade head (102) and the second blade head of one sawtooth unit, and each have three protruding teeth on the top of the first blade head (102) and the second blade head of the other sawtooth unit.

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