Bamboo sawing device of reciprocating saw

Abstract

The reciprocating saw bamboo sawing device is suitable for cutting sympodial bamboos and other bamboo materials, is light, reliable and safe and comprises a reciprocating saw and a handheld rod assembly, and the rear end of the reciprocating saw is connected with the handheld rod assembly or a battery. A handheld rod connector at the front end of the handheld rod assembly can rotate by a certain angle, and the handheld rod assembly can also be connected with a battery; when the handheld rod assembly is not connected, the working state is a first working state, and when the handheld rod assembly is connected, the working state is a second working state; a reciprocating sawing mechanism is adopted, the two saw blades move in opposite directions in real time, longitudinal resistance borne by the single saw blade counteracts, the saw blades with different tooth pitches and tooth shapes can be replaced according to the hardness degree of the green skin of the bamboo, and a dovetail groove and a dovetail sliding block which are embedded in a sliding mode are arranged between the two double-edge tooth saw blades. Under the condition that the effective available length is guaranteed, external auxiliary supporting is not needed, using is more convenient, overall vibration is small, and stability and reliability are achieved.

Description

Technical Field

[0001] The invention relates to bamboo processing equipment, in particular to a reciprocating saw bamboo sawing device, aiming to provide a mechanical device capable of cutting bamboo efficiently and stably. Background Art

[0002] In the field of forestry and bamboo processing, with the continuous growth of demand for bamboo, the requirements for bamboo cutting equipment are getting higher and higher. At present, bamboo felling tools mainly include machetes, oil saws, etc., and manual machete felling has problems such as high labor intensity and low efficiency, which is difficult to meet the needs of the modern bamboo processing industry. In recent years, although some bamboo sawing devices have appeared, the transmission mechanism design of these devices is complex, the maintenance cost is high, and the equipment volume is large, which is not easy to cut bamboo in forest areas with high bamboo density. For example, the existing patent (CN 115606472 A) is a portable bamboo felling chain saw and its use method, which includes a main cavity plate and a roller. A clamping mechanism and a felling mechanism are installed in the main cavity plate. The clamping mechanism includes an adjustment motor, a connecting plate and a clamping rod. The felling mechanism includes a felling motor, a felling sprocket, a chain saw support plate and a chain saw, etc. This device cannot adapt to felling operations in forest areas with high bamboo density such as clump bamboo, and the saw chain pitch is long, the recoil phenomenon is serious, the vibration is large, and it is unsafe. Summary of the invention

[0003] In view of the shortcomings of the above-mentioned prior art, the present invention proposes a reciprocating saw bamboo cutting device, aiming to develop a lightweight type that can quickly cut down bamboo, is easy to use, has a simple structure, and can cut down clumped bamboo. It solves the problems in the prior art that the equipment is large in size, has poor adaptability, or has serious recoil or jamming during operation.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A reciprocating saw bamboo sawing device, characterized in that it comprises a reciprocating saw (1) and a hand-held rod assembly (2); the rear end of the reciprocating saw (1) can be fixedly connected to the front end of the hand-held rod assembly (2) or a battery (1-14); a hand-held rod joint (2-1) at the front end of the hand-held rod assembly (2) can be rotated to a certain angle, and the rear end of the hand-held rod assembly (2) can be fixedly connected to the battery (1-14); by connecting the hand-held rod assembly (2), the reciprocating saw bamboo sawing device has at least two working states, namely a first working state and a second working state; when the reciprocating saw bamboo sawing device is in the first working state, the rear end of the reciprocating saw (1) is only fixedly connected to the battery (1-14); when the reciprocating saw bamboo sawing device is in the second working state, the rear end of the reciprocating saw (1) is fixedly connected to the hand-held rod joint (2-1) at the front end of the hand-held rod assembly (2).

[0006] The above-mentioned reciprocating saw bamboo sawing device is characterized in that the reciprocating saw (1) comprises an upper saw blade (1-1), a lower saw blade (1-2), an upper pressure plate (1-3), a lower pressure plate (1-4), a baffle (1-5), an upper cover (1-6), a base (1-7), a connecting rod (1-8), a large gear (1-9), a small gear (1-10), a motor (1-11), a handle (1-12), a battery mounting seat (1-13), a battery (1-14), a guide block (1-15), and an adjustment switch (1-18); the base (1-7) is a shell-shaped structure, and a rectangular guide groove (1-15) is provided at the front end. 31), a cylindrical shaft (32) is arranged in the middle, the large gear (1-9) is rotatably connected to the cylindrical shaft (32) through the central large gear hole (30) and is close to the bottom surface of the base (1-7); the small gear (1-10) is located at the rear of the large gear and meshes with the large gear for transmission; the motor (1-11) is fixedly connected to the upper cover (1-6), and the motor shaft is fixedly connected to the small gear (1-10); the upper and lower end surfaces of the large gear (1-9) are both provided with cylindrical large gear protrusions (34), and the intersection of the central axis of the two and the upper end surface of the large gear (1-9) and the center point of the large gear in the same plane The connecting line includes an angle of 180°, one end of the connecting rod (1-8) is rotatably connected to the large gear protrusion (34) and is close to the upper end face or the lower end face of the large gear (1-9); the front ends of the two connecting rods (1-8) are rotatably connected to the tails of the upper saw blade (1-1) and the lower saw blade (1-2) respectively; the baffle (1-5) is symmetrically arranged on both sides of the front part of the base (1-7) and is fixedly connected to the base (1-7) to facilitate the splashing of debris generated by the device during operation; the upper pressure plate (1-3) and the lower pressure plate (1-4) are respectively placed on the upper and lower surfaces of the two saw blades, and a guide is installed between the upper and lower pressure plates by bolts. The block (1-15) is fixedly connected to the rectangular guide groove (31) at the front end of the base (1-7); the waist-shaped holes at the tails of the upper saw blade (1-1) and the lower saw blade (1-2) are slidably matched with the guide block (1-15), and are slidably matched with the inner side surfaces of the upper pressure plate (1-3) and the lower pressure plate (1-4); the handle (1-12) is fixedly connected to the rear of the base (1-7), and an adjustment switch (1-18) is provided on the handle for controlling the start and stop of the motor (1-11); the battery mounting seat (1-13) is fixedly connected to the rear of the handle (1-12) and is electrically connected to the battery (1-14).

[0007] The above-mentioned reciprocating saw bamboo sawing device is characterized in that the large gear (1-9) is provided with large gear protrusions (34) on the upper and lower surfaces, and the angle between the intersection of the central axis of the two and the upper end surface of the large gear (1-9) and the center point of the large gear in the same plane is 180°.

[0008] The above-mentioned reciprocating saw bamboo sawing device is characterized in that the guide block (1-15) is arranged in the waist-shaped hole in the lower part of the two saw blades, the length of the waist-shaped hole is greater than twice the eccentricity of the central axis of the large gear protrusion (34) on the large gear (1-9) relative to the central axis of the large gear, and the inner side surfaces of the upper pressure plate (1-3) and the lower pressure plate (1-4) and the waist-shaped hole play a guiding role for the two reciprocating saw blades.

[0009] The above-mentioned reciprocating saw bamboo sawing device is characterized in that the front halves of the upper saw blade (1-1) and the lower saw blade (1-2) are both double-sided saw teeth, and different directions can be selected according to needs to carry out bamboo felling operations. The tooth pitch and tooth shape of the saw blade can be selected according to the hardness of the green skin of the bamboo. The longitudinal resistances on a single saw blade during sawing operations offset each other, and the sawing process is stable. The rear half of the saw blade has no saw teeth and is provided with a waist-shaped hole, and the tail is provided with a round hole. The upper and lower saw blades are respectively provided with a dovetail groove (1-16) and a dovetail slider (1-17) at the contact surface, and the two are slidably matched to prevent the two saw blades from opening during reciprocating motion.

[0010] The above-mentioned reciprocating saw bamboo sawing device is characterized in that the battery mounting seat (1-13) can not only mount the battery (1-14) but also mount the hand-held rod joint (2-1) and maintain conductivity with the hand-held rod assembly (2).

[0011] The above-mentioned reciprocating saw bamboo sawing device is characterized in that the hand-held rod assembly (2) comprises a hand-held rod joint (2-1), a pressure cap (2-2), a stopper (2-3), a compression spring (2-4), a hand-held rod (2-5), a hand-held rod handle (2-6), and a hand-held rod battery mounting seat (2-7); when the reciprocating saw bamboo sawing device is in a second working state, the front end of the hand-held rod joint (2-1) is electrically connected to the battery mounting seat (1-13), and the rear end is provided with a polygonal groove which is rotatably connected to the hand-held rod (2-5) through the pressure cap (2-2), the stopper (2-3) and the compression spring (2-4); the hand-held rod handle (2-6) is fixedly connected to the rear end of the hand-held rod (2-5), and an adjustment switch (1-18) is provided on the hand-held rod handle for controlling the start and stop of the motor (1-11); the hand-held rod battery mounting seat (2-7) is fixedly connected to the rear end of the hand-held rod handle (2-6) and is used to connect the battery (1-14) to provide power to the device.

[0012] The above-mentioned reciprocating saw bamboo sawing device is characterized in that the reciprocating saw bamboo sawing device can be switched from a first working state to a second working state by connecting a hand-held rod assembly (2).

[0013] The above-mentioned reciprocating saw bamboo sawing device is characterized in that the hand-held rod (2-5) is a hollow structure to facilitate the wire to pass through, and a polygonal groove and a rectangular protrusion are arranged at the front end for controllably rotating and connecting the hand-held rod joint (2-1).

[0014] The above-mentioned reciprocating saw bamboo sawing device is characterized in that the stopper (2-3) and the compression spring (2-4) are located in the polygonal groove at the front end of the hand-held rod (2-5) and are sleeved on the rectangular protrusion. When the pressure cap (2-2) is pressed, the hand-held rod joint (2-1) can rotate a certain angle relative to the hand-held rod (2-5).

[0015] The beneficial effects of the technical solution of the present invention are:

[0016] (1) A reciprocating sawing mechanism is adopted to cut bamboo by bidirectional reciprocating motion of the upper saw blade (1-1) and the lower saw blade (1-2) at a high speed. The two saw blades move in opposite directions in real time, and the longitudinal resistances on a single saw blade offset each other. The appropriate tooth pitch and tooth shape can be selected for sawing operation according to the hardness of the green skin of the bamboo. Compared with existing machines, the vibration is small, the sawing process is more stable, more pleasant and safer;

[0017] (2) Through electric drive and simple and reliable transmission structure design, the device is more portable, and the two additional baffles (1-5) provide a support point for the operator, making the sawing process more stable and reliable, and reducing the risk of accidental injury caused by physical overdraw or improper operation;

[0018] (3) The device can flexibly adjust the working state of the device by adding a hand-held rod assembly (2), effectively cope with bamboos of different heights and different planting densities, and maintain a comfortable working posture, thereby enhancing the versatility of the device and the comfort of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a reciprocating saw bamboo sawing device in the first working state;

[0020] Figure 2 A schematic diagram of the structure of the reciprocating saw bamboo sawing device in the second working state;

[0021] Figure 3 Schematic diagram of the internal structure of the base of the reciprocating saw bamboo sawing device;

[0022] Figure 4 Reciprocating Saw Bamboo Cutting Device Exploded diagram of the subject structure of the reciprocating saw;

[0023] Figure 5 Schematic diagram of the upper saw blade structure;

[0024] Figure 6 yes Figure 5 A partial enlarged view of the dovetail groove (1-16) at position A;

[0025] Figure 7 Schematic diagram of the lower saw blade structure;

[0026] Figure 8 yes Figure 7 A partial enlarged view of the dovetail slider (1-17) at position B;

[0027] Fig. 9 Sectional view of the hand-held rod structure;

[0028] Fig.10 yes Fig. 9 A partial enlarged view of point C;

[0029] Fig.11 A partial exploded view of the hand-held rod assembly;

[0030] Fig.12 Schematic diagram of the bull gear and the bull gear protrusion on the bull gear.

[0031] In the figure, a reciprocating saw (1), a hand-held rod assembly (2), an upper saw blade (1-1), a lower saw blade (1-2), an upper pressure plate (1-3), a lower pressure plate (1-4), a baffle (1-5), an upper cover (1-6), a base (1-7), a connecting rod (1-8), a large gear (1-9), a small gear (1-10), a motor (1-11), a handle (1-12), a battery mounting seat (1-13), a battery (1-14), a guide The invention relates to a guide block (1-15), a dovetail groove (1-16), a dovetail slider (1-17), an adjustment switch (1-18), a hand-held rod joint (2-1), a pressure cap (2-2), a stopper (2-3), a compression spring (2-4), a hand-held rod (2-5), a hand-held rod handle (2-6), a hand-held rod battery mounting seat (2-7), a large gear hole (30), a guide groove (31), a cylindrical shaft (32), and a large gear protrusion (34). DETAILED DESCRIPTION

[0032] The specific embodiments of the present invention will be further described below according to the accompanying drawings:

[0033] The present invention is a reciprocating saw bamboo sawing device, such as Figure 1 , Figure 2 As shown, a reciprocating saw bamboo sawing device comprises a reciprocating saw (1) and a hand-held rod assembly (2). In this example, the rear end of the reciprocating saw (1) can be fixedly connected to the front end of the hand-held rod assembly (2) or a battery; the hand-held rod joint (2-1) at the front end of the hand-held rod assembly (2) can move at a certain angle, and the rear end can be fixedly connected to a battery (1-14); by connecting the hand-held rod assembly (2), the reciprocating saw bamboo sawing device has at least two working states, namely a first working state and a second working state; when the reciprocating saw bamboo sawing device is in the first working state, the rear end of the reciprocating saw (1) is only fixedly connected to the battery (1-14); when the reciprocating saw bamboo sawing device is in the second working state, the rear end of the reciprocating saw (1) is fixedly connected to the front end of the hand-held rod assembly (2) and the reciprocating saw (1) and the hand-held rod assembly (2) can be rotated to a certain angle.

[0034] like Figures 3 to 8As shown, in this example, the reciprocating saw (1) includes an upper saw blade (1-1), a lower saw blade (1-2), an upper pressure plate (1-3), a lower pressure plate (1-4), a baffle (1-5), an upper cover (1-6), a base (1-7), a connecting rod (1-8), a large gear (1-9), a small gear (1-10), a motor (1-11), a handle (1-12), a battery mounting seat (1-13), a battery (1-14), and a guide block (1-15); the base (1-7) is a shell-shaped structure, a rectangular guide groove (31) is provided at the front end, a cylindrical shaft (32) is provided in the middle, and the large gear (1-9) is rotatably connected to the bottom of the base (1-7) through the cylindrical shaft and is in contact with the bottom surface; the small gear (1-10) is located at the large gear (1-9) and is in contact with the bottom surface; The rear part of the gear meshes with the large gear for transmission; the motor (1-11) is fixedly connected to the upper cover (1-6) by bolts, and the motor shaft is fixedly connected to the small gear (1-10); the large gear (1-9) is provided with large gear protrusions (34) on the upper and lower surfaces, and the connecting rod (1-8) is rotatably connected to the upper and lower surfaces of the large gear (1-9) through bearings and the large gear protrusions (34); in this embodiment, the large gear (1-9) is provided with large gear protrusions (34) on the upper and lower surfaces, and they are all eccentrically arranged, and the intersection of the central axis of the two and the upper end surface of the large gear (1-9) and the central point of the large gear in the same plane are at an angle of 180°; the front end of the connecting rod (1-8) is rotatably connected to the tail of the upper and lower saw blades, and the driving force of the gear and the connecting rod (1-8) is The upper and lower pressing plates (1-3) and the lower pressing plates (1-4) and the guide blocks (1-15) are arranged in the rectangular guide groove (31) of the base (1-7) to guide the upper and lower saw blades to realize the bidirectional reciprocating and real-time reverse movement of the upper and lower saw blades; in this embodiment, the guide blocks (1-15) are arranged in the waist-shaped holes in the middle and lower parts of the upper and lower saw blades to ensure that the upper and lower saw blades maintain a straight track when reciprocating; the baffles (1-5) are symmetrically arranged on both sides of the front part of the base (1-7) and are fixedly connected to the base, so as to prevent the debris generated by the device during operation from splashing toward the operator, and provide a support point for the operator, so that the sawing process is more stable and reliable; the upper and lower pressing plates are respectively placed on the upper and lower surfaces of the two saw blades, and the guide blocks (1-15) are installed in the middle, through The upper and lower saw blades are fixedly connected to the base (1-7) by bolts, so that the upper and lower saw blades fit tightly together; in this example, the upper and lower saw blades are respectively provided with saw teeth on both sides, and different directions can be selected according to needs to perform bamboo felling operations; the middle and lower parts have no saw teeth and are provided with waist-shaped holes, and the tail parts are provided with round holes; the upper and lower saw blades are provided with dovetail grooves (1-16) and dovetail sliders (1-17) at the fitting surfaces, and the two slide and fit with each other to prevent the saw blades from opening and closing during reciprocating motion; the handle (1-12) is fixedly connected to the rear of the base (1-7), and the handle is provided with an adjustment switch (1-18) for controlling the start and stop and the speed of the motor (1-11); the battery mounting seat (1-13) is fixedly connected to the rear of the handle and is electrically connected to the battery (1-14);In this example, the battery mounting seat (1-13) can not only mount the battery but also mount the hand-held rod connector (2-1) and maintain electrical connection with the hand-held rod assembly (2).

[0035] like Figures 9 to 12 As shown, the hand-held rod assembly (2) in this example comprises a hand-held rod joint (2-1), a pressure cap (2-2), a stopper (2-3), a compression spring (2-4), a hand-held rod (2-5), a hand-held rod handle (2-6), and a hand-held rod battery mounting seat (2-7); when the reciprocating saw bamboo sawing device is in the second working state, the front end of the hand-held rod joint (2-1) is electrically connected to the battery mounting seat (1-13), and the rear end is provided with a polygonal groove which is adjustably rotatably connected to the hand-held rod (2-5) through the pressure cap (2-2), the stopper (2-3) and the compression spring (2-4); in this example, the reciprocating saw bamboo sawing device switches between the first working state and the second working state by whether the hand-held rod assembly (2) is connected; the hand-held rod handle (2-6) is fixedly connected to the hand-held rod (2 -5), a regulating switch (1-18) is arranged on the handle of the hand-held rod for controlling the start and stop of the motor (1-11); the battery mounting seat (2-7) of the hand-held rod is fixedly connected to the tail of the handle of the hand-held rod (2-6), and is used to connect the battery (1-14) to provide power for the device; in this example, the hand-held rod (2-5) is a hollow structure, which is convenient for the wire to pass through the control motor (1-11), and a polygonal groove and a rectangular protrusion are arranged at the front end; in this example, the stopper (2-3) and the compression spring (2-4) are located in the polygonal groove and the rectangular protrusion at the front end of the hand-held rod (2-5); when the pressure cap (2-2) is pressed, the hand-held rod joint (2-1) can be rotated to a certain angle relative to the hand-held rod (2-5); when the pressure cap (2-2) is released, it is instantly locked, and the adjustment is convenient.

[0036] See also Figure 1 to Figure 2When the embodiment is working, the working state of the device needs to be determined according to the terrain where the bamboo grows; if the bamboo grows in a flat area without steep terrain, the first working state of the device can be selected. Before the device works, the battery (1-14) needs to be installed at the tail of the hand-held handle (2-6), and the adjustment switch (1-18) on the handle is operated to put the reciprocating saw into the working state. When the bamboo to be felled is approached, a felling operation can be completed quickly. Moreover, the saw blade has saw teeth on both sides, and the bamboo can be felled in different directions according to needs. If the bamboo grows on a steep terrain or the operator is relatively tall or stands to operate the device, the second working state of the device can be selected, that is, the front end of the hand-held rod joint (2-1) is electrically connected to the battery mounting seat (1-13), and the battery (1-14) is electrically connected to the rear of the hand-held rod battery mounting seat (2-7). In the second working state, when the pressure cap (2-2) is pressed, the hand-held rod joint (2-1) can be rotated to a certain angle relative to the hand-held rod (2-5), so that the reciprocating saw can perform bamboo felling operations from different angles.

[0037] The device realizes electric drive and simple transmission structure design and operation method, reducing the risk of accidental injury caused by physical overdraw or improper operation. The device adopts double saw blades for bidirectional reciprocating motion to avoid the debris generated by traditional chain saws when felling bamboo and splashing everywhere. The device is equipped with a baffle (1-5) at the front end of the base (1-7) to further improve the safety of the operation process. The high-speed upper saw blade (1-1) and the lower saw blade (1-2) are used to cut bamboo in real time in opposite directions. The appropriate tooth pitch and tooth shape can be selected according to the hardness of the green skin of the bamboo for sawing operation. Compared with traditional manual tools or inefficient machinery, the felling speed can be significantly accelerated. The device can flexibly adjust the working state of the device by adding a hand-held rod assembly (2), effectively dealing with bamboos of different heights and different planting densities. Whether it is a sparse or dense bamboo forest, it can maintain a good felling effect, thereby enhancing the versatility and adaptability of the device.

[0038] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention shall be based on the claims. Any replacement, deformation, and improvement of the present invention that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.

Claims

1. A reciprocating saw bamboo sawing device, characterized in that: The invention comprises a reciprocating saw (1) and a hand-held rod assembly (2); the rear end of the reciprocating saw (1) can be fixedly connected to the front end of the hand-held rod assembly (2) or a battery (1-14); a hand-held rod joint (2-1) at the front end of the hand-held rod assembly (2) can be rotated to a certain angle, and the rear end of the hand-held rod assembly (2) can be fixedly connected to the battery (1-14); by connecting the hand-held rod assembly (2), the reciprocating saw bamboo sawing device has at least two working states, namely a first working state and a second working state; when the reciprocating saw bamboo sawing device is in the first working state, the rear end of the reciprocating saw (1) is only fixedly connected to the battery (1-14); when the reciprocating saw bamboo sawing device is in the second working state, the rear end of the reciprocating saw (1) is fixedly connected to the hand-held rod joint (2-1) at the front end of the hand-held rod assembly (2).

2. A reciprocating saw bamboo sawing device according to claim 1, characterized in that The reciprocating saw (1) comprises an upper saw blade (1-1), a lower saw blade (1-2), an upper pressure plate (1-3), a lower pressure plate (1-4), a baffle (1-5), an upper cover (1-6), a base (1-7), a connecting rod (1-8), a large gear (1-9), a small gear (1-10), a motor (1-11), a handle (1-12), a battery mounting seat (1-13), a battery (1-14), a guide block (1-15), and an adjustment switch (1-18); the base (1-7) is a shell-shaped structure, a rectangular guide groove (31) is arranged at the front end, and a cylindrical shaft (31) is arranged in the middle. 32), the large gear (1-9) is rotatably connected to the cylindrical shaft (32) through the central large gear hole (30) and is close to the bottom surface of the base (1-7); the small gear (1-10) is located at the rear of the large gear and meshes with the large gear for transmission; the motor (1-11) is fixedly connected to the upper cover (1-6), and the motor shaft is fixedly connected to the small gear (1-10); the upper and lower end surfaces of the large gear (1-9) are both provided with cylindrical large gear protrusions (34), and the intersection of the central axis of the two and the upper end surface of the large gear (1-9) and the central point of the large gear in the same plane are connected at an angle of 180° One end of the connecting rod (1-8) is rotatably connected to the large gear protrusion (34) and is close to the upper end face or the lower end face of the large gear (1-9); the front ends of the two connecting rods (1-8) are rotatably connected to the tails of the upper saw blade (1-1) and the lower saw blade (1-2) respectively; the baffle (1-5) is symmetrically arranged on both sides of the front part of the base (1-7) and is fixedly connected to the base (1-7) to facilitate the splashing of debris generated by the device during operation; the upper pressure plate (1-3) and the lower pressure plate (1-4) are respectively placed on the upper and lower surfaces of the two saw blades, and a guide block (1-1 5), and is fixedly connected in a rectangular guide groove (31) at the front end of the base (1-7), the waist-shaped holes at the tail of the upper saw blade (1-1) and the lower saw blade (1-2) are slidably matched with the guide block (1-15), and are slidably matched with the inner side surfaces of the upper pressure plate (1-3) and the lower pressure plate (1-4); the handle (1-12) is fixedly connected to the rear of the base (1-7), and an adjustment switch (1-18) is provided on the handle for controlling the start and stop of the motor (1-11); the battery mounting seat (1-13) is fixedly connected to the rear of the handle (1-12) and is electrically connected to the battery (1-14).

3. A reciprocating saw bamboo sawing device according to claim 1, characterized in that The large gear (1-9) is provided with large gear protrusions (34) on both the upper and lower surfaces, and the angle between the intersection of the central axis of the two and the upper end surface of the large gear (1-9) and the center point of the large gear in the same plane is 180°.

4. A reciprocating saw bamboo sawing device according to claim 1, characterized in that The guide block (1-15) is arranged in a waist-shaped hole in the middle and lower parts of the two saw blades. The length of the waist-shaped hole is greater than twice the eccentricity of the central axis of the large gear protrusion (34) on the large gear (1-9) relative to the central axis of the large gear. The inner side surfaces of the upper pressing plate (1-3) and the lower pressing plate (1-4) and the waist-shaped hole play a guiding role for the two reciprocating saw blades.

5. A reciprocating saw bamboo sawing device according to claim 1, characterized in that The front halves of the upper saw blade (1-1) and the lower saw blade (1-2) are both provided with double-sided serrations, the rear halves of the saw blades are free of serrations and are provided with waist-shaped holes, and the tails are provided with round holes. The upper and lower saw blades are respectively provided with dovetail grooves (1-16) and dovetail sliders (1-17) at the mating surfaces thereof, and the two are slidably matched.

6. A reciprocating saw bamboo sawing device according to claim 1, characterized in that The battery mounting seat (1-13) can not only mount the battery (1-14) but also mount the hand-held rod connector (2-1) and maintain conductivity with the hand-held rod assembly (2).

7. A reciprocating saw bamboo sawing device according to claim 1, characterized in that The hand-held rod assembly (2) comprises a hand-held rod joint (2-1), a pressure cap (2-2), a stopper (2-3), a compression spring (2-4), a hand-held rod (2-5), a hand-held rod handle (2-6), and a hand-held rod battery mounting seat (2-7); when the reciprocating saw bamboo sawing device is in a second working state, the front end of the hand-held rod joint (2-1) is electrically connected to the battery mounting seat (1-13), and the rear end is provided with a polygonal groove which is rotatably connected to the hand-held rod (2-5) through the pressure cap (2-2), the stopper (2-3) and the compression spring (2-4); the hand-held rod handle (2-6) is fixedly connected to the rear end of the hand-held rod (2-5), and an adjustment switch (1-18) is provided on the hand-held rod handle for controlling the start and stop of the motor (1-11); the hand-held rod battery mounting seat (2-7) is fixedly connected to the rear end of the hand-held rod handle (2-6) and is used to connect the battery (1-14).

8. The reciprocating saw bamboo sawing device according to claim 1, characterized in that The reciprocating saw bamboo sawing device can be switched from a first working state to a second working state by connecting a hand-held rod assembly (2).

9. A reciprocating saw bamboo sawing device according to claim 1, characterized in that The hand-held rod (2-5) is a hollow structure, which is convenient for the wire to pass through, and a polygonal groove and a rectangular protrusion are arranged at the front end, which are used for controllably rotating and connecting the hand-held rod connector (2-1).

10. The reciprocating saw bamboo sawing device according to claim 1, characterized in that The stopper (2-3) and the compression spring (2-4) are located in the polygonal groove at the front end of the hand-held rod (2-5) and are sleeved on the rectangular protrusion. When the pressure cap (2-2) is pressed, the hand-held rod joint (2-1) can rotate at a certain angle relative to the hand-held rod (2-5).

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