Saw blade

Abstract

The utility model provides a saw blade which comprises a saw blade body and sawteeth arranged on the edge of the saw blade body, the sawteeth comprise thick teeth and thin teeth, the thick teeth are located on one side of the saw blade body, the thin teeth are located on the other side of the saw blade body, the front angle of each thin tooth is 3 + / -1 degrees, and the front angle of each thick tooth is 7 + / -1 degrees. The front angles of the saw teeth are smaller, the amount of saw dust contained in the saw is smaller during cutting, the saw is smoother to use and not prone to shaking, and the cutting efficiency can be improved. According to the utility model, the mixed teeth formed by combining the staggered teeth and the flat teeth are adopted, so that the cutting performance can be improved, and chips can be conveniently discharged. The double-sided saw can be used as a double-sided saw to better meet the sawing requirements of different materials or the same material in different directions, and can also be converted into a back clamping saw to meet the requirements of high-difficulty sawing operation.

Description

Technical Field

[0001] The utility model relates to a manual tool, more specifically, to a saw blade. Background Art

[0002] Hand saw is a common tool. Ordinary hand saws have relatively simple functions. Each hand saw usually has only one specification of saw teeth. Different materials have different densities, and even the same material has different physical properties in different directions. Different specifications of saw teeth show different sawing resistance. In order to better adapt to different materials, or different directions of the same material, users often need to equip saw blades with multiple saw tooth specifications, which not only increases the procurement cost, but also brings inconvenience to tool management. For this reason, the market has launched a double-sided saw with saw teeth of different specifications, which can adapt to different materials, or different directions of the same material. However, the setting of the saw tooth rake angle of the existing double-sided saw is not reasonable, which affects the sawing smoothness and sawing efficiency. The utility model patent with publication number CN219520686U discloses a folding saw. Although the utility model is a double-sided saw, it does not make improvements to the saw tooth rake angle of the saw teeth. Utility Model Content

[0003] The existing hand saw blade has an unreasonable setting of the saw tooth front angle, which affects the sawing smoothness and sawing efficiency. To overcome this defect, the utility model provides a saw blade with a more reasonable setting of the saw tooth front angle, which is beneficial to improving the sawing smoothness and sawing efficiency.

[0004] The technical solution of the utility model is: a saw blade, comprising a saw blade body and saw teeth arranged at the edge of the saw blade body, the saw teeth comprising coarse teeth and fine teeth, the coarse teeth are located on one side of the saw blade body, the fine teeth are located on the other side of the saw blade body, the front angle angle of the fine teeth is 3±1°, and the front angle angle of the coarse teeth is 7±1°. The coarse teeth are suitable for rough processing, and the fine teeth are used for fine processing. If used for sawing wood, since the tooth height and tooth pitch of the coarse teeth are greater than those of the fine teeth, the strength of a single tooth is relatively weak, and it is more suitable for longitudinal cutting along the direction of the wood grain. When sawing along the direction of the wood grain, most of the saw blade moves in the gap between the wood fibers and is subject to less resistance; the fine teeth are suitable for cross-cutting, used to cut off the wood fibers. The saw tooth front angle angle is usually expressed as the angle between the front edge of the saw tooth and the width direction of the saw blade body. Compared with ordinary saw blades, the saw tooth front angle angles of 3±1° and 7±1° of the saw blade are smaller. When cutting, the amount of wood chips accommodated is less, it is smoother to use, not easy to shake, and the cutting efficiency can be improved.

[0005] Preferably, the fine teeth are mixed teeth composed of staggered teeth and flat teeth, and the fine teeth side of the saw blade body includes a plurality of periodically continuously distributed mixed tooth segments. Staggered teeth refer to the saw teeth that are not coplanar with the saw blade body, and are inclined toward the outside of the saw blade body from the tooth root to the tooth tip, some of which are inclined toward one side of the saw blade body, and some are inclined toward the other side, and are arranged alternately, with the tooth tips staggered. In this way, when reciprocating sawing, since the cutting width is greater than the thickness of the saw blade, the sawing path is relatively wide, which not only saves effort to pull back and forth, but also reduces friction, so that the saw blade will not be stuck due to excessive friction, and the heat generated by the saw blade can be reduced, thereby extending the life of the saw blade. Flat teeth refer to the saw teeth that are coplanar with the saw blade body. Fine teeth are a mixture of staggered teeth and flat teeth. They have the advantages of wide saw paths and low friction after staggered teeth division, which can avoid saw blade jumping and swinging during cutting and improve cutting performance. At the same time, the tooth height of the staggered teeth after division is lower than that of the flat teeth without division. The flat teeth without division are the first to contact the sawed material during cutting. The saw blade is ground in three directions during sawing, and can perform three-way cutting, which speeds up the sawing speed and improves the sawing efficiency. On the other hand, during chip removal, the flat teeth without division can drag the wood chips for easy chip removal.

[0006] Preferably, each mixing tooth segment comprises four staggered teeth and two flat teeth.

[0007] Alternatively, each mixing tooth segment includes six staggered teeth and two flat teeth.

[0008] Preferably, the coarse teeth are staggered teeth. Different from the fine teeth of precision machining, the coarse teeth are fully divided, that is, all the teeth are tilted, without flat teeth, and the staggered tooth shape can produce a cutting width greater than the thickness of the saw blade, which can avoid the saw blade from jumping and swinging during cutting, reduce friction, and prevent the saw blade from being clamped.

[0009] Preferably, the saw teeth are gradual teeth, and the tooth spacing of the saw teeth gradually changes from the rear end of the saw blade body to the front end of the saw blade body. The saw blade with gradual teeth is easy to exert force when in use, more efficient, improves work efficiency, and is more in line with the output curve of human force when exerting force.

[0010] As an alternative, the saw teeth are equidistant teeth, and the tooth spacing of the saw teeth is equal from the rear end of the saw blade body to the front end of the saw blade body. The equidistant teeth are relatively easier to process.

[0011] Preferably, the front and rear ends of the saw blade body are both provided with bevel structures, and the saw teeth are distributed between the bevel structures at the front and rear ends of the saw blade body. The bevel structures are all lower than the tooth height of the saw teeth, which can prevent the front or rear end of the saw blade from being clamped in the sawed material, and can effectively play a guiding role when separating from the sawed material, so that the saw blade can be easily separated from the sawed material.

[0012] Preferably, the saw blade surface is provided with a chemical nickel plating layer. The chemical nickel plating method can achieve a coating protection without dead angles. In addition, compared with electroplating or painting, the chemical nickel plating coating is more uniform and has higher wear resistance.

[0013] Preferably, the saw blade body is provided with a detachable clamping bag edge. The saw blade body can be equipped with a clamping bag edge as needed to convert the saw blade from a double-sided saw form to a clamping back saw form, which can assist in adding force when sawing tougher materials and complete the sawing more smoothly.

[0014] The beneficial effects of the utility model are:

[0015] Improve sawing smoothness and sawing efficiency. The saw teeth of the utility model have smaller front angles, and when cutting, the amount of sawdust contained is less, and the saw is smoother to use and less likely to shake, and the cutting efficiency can be improved.

[0016] Taking into account both cutting performance and chip removal convenience. The utility model adopts mixed teeth composed of staggered teeth and flat teeth, which can improve cutting performance and facilitate chip removal.

[0017] Multiple functions. The utility model can be used as a double-sided saw to better meet the requirements of sawing different materials or the same material in different directions, and can also be converted into a clamping back saw to meet the needs of difficult sawing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A structural schematic diagram of the utility model;

[0019] Figure 2 A schematic diagram of a tooth division method of fine teeth in the utility model;

[0020] Figure 3 for Figure 1 Schematic diagram of the local structure at A in the middle;

[0021] Figure 4 It is a schematic diagram of the tooth division method of the coarse teeth in the utility model;

[0022] Figure 5 for Figure 1 Schematic diagram of the local structure at B in the middle;

[0023] Figure 6 It is a schematic diagram of another tooth division method of the medium fine teeth of the utility model;

[0024] Figure 7 It is a structural schematic diagram of a double-sided hand saw using the utility model;

[0025] Figure 8 A schematic diagram of the disassembly structure of the folding back saw using the utility model;

[0026] Fig. 9 A schematic diagram of the connection structure between the clamp bag edge and the saw handle in the folding clamp back saw of the utility model;

[0027] Fig.10 A structural diagram of a locking mechanism in a folding back saw using the utility model;

[0028] Fig.11 A schematic diagram of the structure of a folding back saw using the utility model;

[0029] Fig.12 Another structural schematic diagram of the folding back saw using the utility model is shown.

[0030] In the figure, 1-saw blade body, 101-clamp bag edge, 1011-bayonet, 102-bevel angle structure, 103-saw handle connecting part, 2-saw teeth, 201-coarse teeth, 202-fine teeth, 3-saw handle, 301-saw blade groove, 302-mounting plate groove, 303-mounting plate, 304-recessed part, 4-locking rod, 401-hook, 402-pin, 403-rotating shaft, 5-tensioning spring. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the specific embodiments of the drawings.

[0032] Embodiment 1:

[0033] like Figures 1 to 5 , Figure 7As shown, a saw blade comprises a saw blade body 1 and saw teeth 2, wherein the saw teeth 2 are arranged at the edge of the saw blade body 1. There are two types of saw teeth 2, one is coarse teeth 201, and the other is fine teeth 202. The coarse teeth 201 are located on one side of the saw blade body 1, and the fine teeth 202 are located on the other side of the saw blade body 1. The front angle of the fine teeth 202, that is, the angle between the front edge of the fine teeth 202 and the width direction of the saw blade body 1 is 3°, and the support angle of the fine teeth 202, that is, the angle between the front edge of the tooth tip cutting angle of the fine teeth 202 and the axial direction of the saw blade body 1 is 35°; the front angle of the coarse teeth 201, that is, the angle between the front edge of the tooth tip cutting angle of the coarse teeth 201 and the width direction of the saw blade body 1 is 7°, and the support angle of the coarse teeth 201, that is, the angle between the front edge of the tooth tip cutting angle of the coarse teeth 201 and the axial direction of the saw blade body 1 is 25°. The total length of the saw blade body 1 is 250 mm, and the distribution length of the saw teeth 2 is 236.6 mm. The fine teeth 202 are mixed teeth, which are composed of staggered teeth and flat teeth. The fine tooth side of the saw blade body 1 is composed of 33 mixed tooth segments, and the 33 mixed tooth segments are periodically and continuously distributed. The tooth division method of each mixed tooth segment is four-by-two, that is, each mixed tooth segment contains six saw teeth, four of which are divided into four continuous staggered teeth, and the other two are not divided into two continuous flat teeth. The fine teeth 202 constituting the four staggered teeth are alternately inclined to the two sides of the plane where the saw blade body 1 is located, and the two flat teeth are coplanar with the saw blade body 1. The tooth division method of the coarse teeth 201 is full division, that is, all the coarse teeth 201 are alternately inclined to the two sides of the plane where the saw blade body 1 is located, that is, in two adjacent coarse teeth 201, the tooth tip of one coarse tooth 201 deviates from the plane where the saw blade body 1 is located, and is inclined to one side of the plane where the saw blade body 1 is located, and the tooth tip of the other coarse tooth 201 is inclined to the other side of the plane where the saw blade body 1 is located. In this way, the saw blade will have more space when sawing and will not get stuck due to excessive friction. From the rear end of the saw blade body 1 to the front end of the saw blade body 1, the tooth spacing of the coarse teeth 201 increases from 2.1mm to 3.7mm in a step increment of 0.02mm, and this step-by-step gradual change constitutes a gradual tooth. The fine teeth 202 are equidistant teeth with a tooth spacing of 1.4mm. The front and rear ends of the saw blade body 1 are both provided with a bevel structure 102, and the saw teeth 2 are distributed between the bevel structures 102 at the front and rear ends of the saw blade body 1, and no saw teeth are provided at the bevel structure 102. The length of the bevel structure 102 is in a certain proportional relationship with the length of the saw blade body 1, and the ratio of the length of the bevel structure 102 to the length of the saw blade body 1 is 4.5%. The end of the saw blade body 1 gradually narrows to form a saw handle connection part 103, and the saw handle connection part 103 is fixedly connected to a wooden saw handle 3 by screws to form a double-sided hand saw. There is a smooth transition between the chamfer structure 102 at the rear end of the saw blade body 1 and the saw handle connection part 103. In order to improve the flatness of the saw surface, the utility model adopts chemical nickel plating to form a chemical nickel plating layer on the surface of the saw blade. The saw blade coated in this way can achieve no dead angle coating, and the formed coating is more uniform than the coating formed by electroplating and painting, and has higher wear resistance.

[0034] The utility model is used for sawing wood. When in use, the coarse teeth 201 and the fine teeth 202 are respectively used for sawing in different directions. When the wood is cut longitudinally along the wood grain direction, the coarse teeth 201 are used. During sawing, most of the saw blade moves in the gap between wood fibers, and the resistance is small, so it is not easy to break the saw surface; when the wood is cut transversely perpendicular to the wood grain direction, the fine teeth 202 are used. The single tooth strength of the fine teeth 202 can ensure that the fine teeth 202 are sufficient to pull back and forth to cut the wood fibers.

[0035] Embodiment 2:

[0036] like Figure 6As shown, a saw blade comprises a saw blade body 1 and saw teeth 2, wherein the saw teeth 2 are arranged at the edge of the saw blade body 1. There are two types of saw teeth 2, one is coarse teeth 201, and the other is fine teeth 202. The coarse teeth 201 are located on one side of the saw blade body 1, and the fine teeth 202 are located on the other side of the saw blade body 1. The front angle of the fine teeth 202, that is, the angle between the front edge of the fine teeth 202 and the width direction of the saw blade body 1 is 2°, and the support angle of the fine teeth 202, that is, the angle between the front edge of the tooth tip cutting angle of the fine teeth 202 and the axial direction of the saw blade body 1 is 35°; the front angle of the coarse teeth 201, that is, the angle between the front edge of the tooth tip cutting angle of the coarse teeth 201 and the width direction of the saw blade body 1 is 6°, and the support angle of the coarse teeth 201, that is, the angle between the front edge of the tooth tip cutting angle of the coarse teeth 201 and the axial direction of the saw blade body 1 is 25°. The total length of the saw blade body 1 is 250 mm, and the distribution length of the saw teeth 2 is 236.6 mm. The fine teeth 202 are mixed teeth, which are composed of staggered teeth and flat teeth. The fine tooth side of the saw blade body 1 is composed of 33 mixed tooth segments, and the 33 mixed tooth segments are periodically and continuously distributed. The tooth division method of each mixed tooth segment is six-by-two, that is, each mixed tooth segment contains eight saw teeth, six of which are divided into six continuous staggered teeth, and the other two are not divided into two continuous flat teeth. The fine teeth 202 constituting the six staggered teeth are alternately inclined to the two sides of the plane where the saw blade body 1 is located, and the two flat teeth are coplanar with the saw blade body 1. The tooth division method of the coarse teeth 201 is full division, that is, all the coarse teeth 201 are alternately inclined to the two sides of the plane where the saw blade body 1 is located, that is, in two adjacent coarse teeth 201, the tooth tip of one coarse tooth 201 deviates from the plane where the saw blade body 1 is located, and is inclined to one side of the plane where the saw blade body 1 is located, and the tooth tip of the other coarse tooth 201 is inclined to the other side of the plane where the saw blade body 1 is located. In this way, the saw blade will have more space when sawing and will not get stuck due to excessive friction. From the rear end of the saw blade body 1 to the front end of the saw blade body 1, the tooth spacing of the coarse teeth 201 increases from 2.1mm to 3.7mm in a step increment of 0.02mm, and this step-by-step gradual change constitutes a gradual tooth. The fine teeth 202 are equidistant teeth with a tooth spacing of 1.4mm. The front and rear ends of the saw blade body 1 are both provided with a bevel structure 102, and the saw teeth 2 are distributed between the bevel structures 102 at the front and rear ends of the saw blade body 1, and no saw teeth are provided at the bevel structure 102. The length of the bevel structure 102 is in a certain proportional relationship with the length of the saw blade body 1, and the ratio of the length of the bevel structure 102 to the length of the saw blade body 1 is 4.5%. The end of the saw blade body 1 gradually narrows to form a saw handle connection part 103, and the saw handle connection part 103 is fixedly connected to a wooden saw handle 3 by screws to form a double-sided hand saw. There is a smooth transition between the chamfer structure 102 at the rear end of the saw blade body 1 and the saw handle connection part 103. In order to improve the flatness of the saw surface, the utility model adopts chemical nickel plating to form a chemical nickel plating layer on the surface of the saw blade. The saw blade coated in this way can achieve no dead angle coating, and the formed coating is more uniform than the coating formed by electroplating and painting, and has higher wear resistance.

[0037] Embodiment 3:

[0038] A saw blade comprises a saw blade body 1 and saw teeth 2, wherein the saw teeth 2 are arranged at the edge of the saw blade body 1. There are two types of saw teeth 2, one is a coarse tooth 201, and the other is a fine tooth 202. The coarse tooth 201 is located on one side of the saw blade body 1, and the fine tooth 202 is located on the other side of the saw blade body 1. The front angle of the fine tooth 202, that is, the angle between the front edge of the fine tooth 202 and the width direction of the saw blade body 1 is 4°, and the support angle of the fine tooth 202, that is, the angle between the front edge of the tooth tip cutting angle of the fine tooth 202 and the axial direction of the saw blade body 1 is 35°; the front angle of the coarse tooth 201, that is, the angle between the front edge of the tooth tip cutting angle of the coarse tooth 201 and the width direction of the saw blade body 1 is 8°, and the support angle of the coarse tooth 201, that is, the angle between the front edge of the tooth tip cutting angle of the coarse tooth 201 and the axial direction of the saw blade body 1 is 25°. The total length of the saw blade body 1 is 250 mm, and the distribution length of the saw teeth 2 is 236.6 mm. The fine teeth 202 are mixed teeth, which are composed of staggered teeth and flat teeth. The fine tooth side of the saw blade body 1 is composed of 33 mixed tooth segments, and the 33 mixed tooth segments are periodically and continuously distributed. The tooth division method of each mixed tooth segment is six-by-two, that is, each mixed tooth segment contains eight saw teeth, six of which are divided into six continuous staggered teeth, and the other two are not divided into two continuous flat teeth. The fine teeth 202 constituting the six staggered teeth are alternately inclined to the two sides of the plane where the saw blade body 1 is located, and the two flat teeth are coplanar with the saw blade body 1. The tooth division method of the coarse teeth 201 is full division, that is, all the coarse teeth 201 are alternately inclined to the two sides of the plane where the saw blade body 1 is located, that is, in two adjacent coarse teeth 201, the tooth tip of one coarse tooth 201 deviates from the plane where the saw blade body 1 is located, and is inclined to one side of the plane where the saw blade body 1 is located, and the tooth tip of the other coarse tooth 201 is inclined to the other side of the plane where the saw blade body 1 is located. In this way, the saw blade will have more space when sawing, and will not get stuck due to excessive friction. From the rear end of the saw blade body 1 to the front end of the saw blade body 1, the tooth spacing of the coarse teeth 201 is maintained at 2.4mm, thus forming equidistant teeth. The fine teeth 202 are also equidistant teeth, with a tooth spacing of 1.4mm. The front and rear ends of the saw blade body 1 are both provided with a bevel structure 102, and the saw teeth 2 are distributed between the bevel structures 102 at the front and rear ends of the saw blade body 1, and no saw teeth are provided at the bevel structure 102. The length of the bevel structure 102 is in a certain proportional relationship with the length of the saw blade body 1, and the ratio of the length of the bevel structure 102 to the length of the saw blade body 1 is 4.5%. The end of the saw blade body 1 gradually narrows to form a saw handle connection part 103, and the saw handle connection part 103 is fixedly connected to a wooden saw handle 3 by screws to form a double-sided hand saw. There is a smooth transition between the bevel structure 102 at the rear end of the saw blade body 1 and the saw handle connection part 103. In order to improve the flatness of the saw surface, the utility model adopts chemical nickel plating to perform coating covering, and forms a chemical nickel plating layer on the surface of the saw blade. The saw blade coated in this way can be coated without dead angles. The formed coating is more uniform than the coating formed by electroplating and painting, and has higher wear resistance.

[0039] Embodiment 4:

[0040] like Figures 8 to 12 As shown, a saw blade includes a saw blade body 1 and saw teeth 2. The saw blade body 1 is provided with a clamping bag edge 101 and a mounting hole. The clamping bag edge 101 is detachably connected to either side of the saw blade body 1 by screws that match and align with the mounting hole, covering the saw teeth 2. The clamping bag edge 101 is hinged to a wooden saw handle 3 to form a folding clamping saw. The saw handle 3 is provided with a saw blade embedding groove 301 for accommodating one side of the saw blade to be embedded. The saw handle 3 is provided with a locking mechanism that can lock the saw blade when the saw blade is unfolded. The hinged end of the saw blade is provided with a bayonet 1011. The inner wall on one side of the bayonet 1011 is a plane, and the bottom of the inner wall on the other side is an arc surface. The plane inner wall is close to the hinged end of the saw blade, and the inner wall with the arc surface is far away from the hinged end of the saw blade. The locking mechanism includes a locking rod 4 and a tensioning spring 5. The middle part of the locking rod 4 is rotatably connected to the saw handle 3 through a rotating shaft 403. The tensioning spring 5 is installed on the saw handle 3. One end of the locking rod 4 is provided with a hook 401 that can be engaged with the bayonet 1011. The other end of the locking rod 4 is connected to the tensioning spring 5. When the saw blade is fully unfolded, the rotating shaft 403 is flush with the bayonet 1011. The clamping bag edge 101 is fixed to the top of the saw blade body 1 by bolts and matching nuts. The clamping bag edge 101 is hinged to the saw handle 3. The front end of the saw handle 3 is provided with a mounting plate embedding groove 302. Two steel mounting plates 303 are embedded in the mounting plate embedding groove 302. The two mounting plates 303 clamp the rear end of the clamping bag edge 101 and are then connected to the saw handle 3 through screws that penetrate the saw handle 3 horizontally. The rear end of the mounting plate 303 is provided with a right-angle cutout to form a support portion for supporting the bottom end of the tensioning spring 5, so that the tensioning spring 5 is installed on the mounting plate 303. The locking rod 4 is located between the two mounting plates 303, and the rotating shaft 403 vertically penetrates the mounting plates 303. The outer surface of the hook 401 is arc-shaped, and the inner surface of the hook 401 is flat. The corner of the hinged end of the saw blade is rounded. The connecting end of the locking rod 4 and the tensioning spring 5 is provided with a pin 402 perpendicular to the locking rod 4, and the tensioning spring 5 is sleeved on the pin 402. The end of the mounting plate embedding groove 302 corresponds to the tensioning spring 5, and the surface of the saw handle 3 at the end of the mounting plate embedding groove 302 is provided with a recessed portion 204, so that the end of the locking rod 4 above the tensioning spring 5 is exposed, which is convenient for pressing the locking rod 4 at this location. The rest is the same as in Example 1.

[0041] When the folding clamp back saw of the utility model is used, the saw teeth 2 can be selected according to the sawing material, and then the clamp back edge 101 can be installed on the side of the unselected saw teeth 2 to close the saw teeth 2 on the side. Fig.10 , Fig.12The effect of the fine teeth 202 and the coarse teeth 201 being closed by the bag edge 101 is shown respectively. The saw handle 3 is flipped outward to a fully open state, so that the saw teeth 2 are exposed, and sawing operation is performed. When the saw blade is unfolded and the saw blade and the saw handle 3 rotate relative to each other, the force exerted on the hook 401 when the hinged end of the saw blade contacts the arc-shaped outer surface of the hook 401 can generate a torque to lift and flip the hook end of the lock rod 4. Therefore, the hinged end of the saw blade can lift and flip the hook end of the lock rod 4, so that the lock rod 4 makes way for the saw blade's bayonet 1011 to be in place. When the saw blade is fully unfolded, the latch 1011 moves with the hinged end of the saw blade to the position of the hook 401, and the hook 401 enters the latch 1011 to form a latching connection. At this time, if the saw blade continues to unfold, the inner wall of the latch 1011 is resisted by the outer side of the hook 401, preventing the saw blade and the saw handle 3 from continuing to unfold. The force of the inner wall of the latch 1011 on the hook 401 passes through the rotating shaft 403, and cannot generate a torque to reverse the locking rod 4; at this time, if the saw blade rotates in the folding direction, the inner side of the hook 401 is also resisted by the inner wall of the latch 1011, and the reverse flipping of the saw blade is also hindered by the hook pulling effect of the hook 401. The force of the inner wall of the latch 1011 on the hook 401 still passes through the rotating shaft 403, and cannot generate a torque to reverse the locking rod 4. Therefore, the saw blade can stably maintain the unfolded state under the action of the locking rod 4. When the utility model is not in use, the end of the tensioning spring 5 of the locking rod 4 is pressed to push the end downward, the hook end of the locking rod 4 is tilted upward, the hook 401 moves out of the latch 1011, the saw blade is unlocked, the saw handle 3 and the saw blade are flipped back toward each other, and the saw tooth side of the saw blade is embedded in the saw blade groove 301. At this time, the saw is in a folded state as a whole, which not only shields the saw teeth to achieve effective safety protection, but also reduces the volume for easy storage and carrying.

Claims

1. A saw blade, comprising a saw blade body (1) and saw teeth (2) arranged on the edge of the saw blade body (1), characterized in that: The saw teeth comprise coarse teeth (201) and fine teeth (202); the coarse teeth (201) are located on one side of the saw blade body (1), and the fine teeth (202) are located on the other side of the saw blade body (1); the front angle of the fine teeth (202) is 3±1°, and the front angle of the coarse teeth (201) is 7±1°.

2. The saw blade according to claim 1, characterized in that: The fine teeth (202) are mixed teeth formed by a combination of staggered teeth and flat teeth, and the fine tooth side of the saw blade body (1) comprises a plurality of periodically and continuously distributed mixed tooth segments.

3. The saw blade according to claim 2, characterized in that: Each mixing tooth segment includes four staggered teeth and two flat teeth.

4. The saw blade according to claim 2, characterized in that: Each mixing tooth segment includes six staggered teeth and two flat teeth.

5. The saw blade according to claim 1, characterized in that: The coarse teeth (201) are staggered teeth.

6. The saw blade according to claim 1, characterized in that The teeth (201) are gradually changing teeth, and the tooth spacing of the coarse teeth (201) gradually changes from the rear end of the saw blade body (1) to the front end of the saw blade body (1).

7. The saw blade according to claim 1, characterized in that The teeth (201) are equidistant teeth, and the tooth spacing of the coarse teeth (201) is equal from the rear end of the saw blade body (1) to the front end of the saw blade body (1).

8. The saw blade according to claim 1, characterized in that: The front and rear ends of the saw blade body (1) are both provided with bevel structures, and the saw teeth (2) are distributed between the bevel structures at the front and rear ends of the saw blade body (1).

9. The saw blade according to claim 1, characterized in that: The surface of the saw blade is provided with a chemical nickel plating layer.

10. The saw blade according to any one of claims 1 to 9, characterized in that: A detachable clamping bag edge (101) is provided on the saw blade body (1).

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