Jig saw self-adaptive to cutting thickness

Abstract

The jig saw comprises a jig saw body, a connecting column is fixedly installed on the lower surface of the jig saw body, a connecting cylinder is installed on the outer surface of the connecting column in a sliding mode, a bottom plate is fixedly installed on the lower surface of the connecting cylinder, and a thickness adjusting mechanism is rotatably installed between the bottom plate and the jig saw body. Through the design of the thickness adjusting mechanism, the thickness adjusting mechanism can conduct self-adaptive adjusting operation on the length of the saw blade according to the thicknesses of the plates, workers do not need to manually and frequently adjust the length of the saw blade to adapt to the plates of different thicknesses, and when the plates of different thicknesses are cut in batches, the cutting efficiency is improved. The length of the saw blade can be rapidly adjusted according to the thickness of a plate through the self-adaptive adjusting function, the preparation time before cutting each time is shortened, the overall cutting efficiency is improved, the situation that the saw blade swings due to the too long saw blade or is not thorough in cutting due to the too short saw blade can be avoided, and the problems of burrs, edge breakage and the like are solved.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, specifically to a jigsaw with adaptive cutting thickness. Background Technology

[0002] As a type of power tool, the jigsaw is widely used in various applications. Its working principle involves a motor driving a gear reduction system; the eccentric roller on the large gear drives the reciprocating rod and saw blade in a reciprocating motion for sawing. Currently, a small gear is connected to the motor's output shaft, which directly meshes with the large gear. Because the distance between the reciprocating rod and the motor is relatively large, increasing the tip circle diameter of the large gear is necessary to enable meshing between the small and large gears. This results in a larger overall size for the jigsaw, making it less portable.

[0003] For example, CN215618637U discloses a jigsaw in which a power supply (3) and an output mechanism (4) are respectively installed in a first housing (1) and a second housing (2) that are detachably connected. The first housing (1) and the second housing (2) are detachably connected, which makes it convenient to replace the power supply or the output mechanism separately. The same power supply can be used for different output mechanisms, and it is also convenient to produce standard parts of the power supply (3) and the output mechanism (4). The power supply (3) placed in the first housing (1) can be charged separately, that is, the charging method of connecting the power plug in the prior art is replaced by replacing the power supply (3), which is more convenient to use.

[0004] However, the aforementioned jigsaw cannot adaptively adjust the cutting thickness according to the material thickness during the cutting process. This causes the material to bounce back when cutting materials of different thicknesses. This sudden rebound force can cause the operator to lose control of the jigsaw, leading to a safety accident. Utility Model Content

[0005] The purpose of this invention is to provide a jigsaw with adaptive cutting thickness to solve the problem mentioned in the background art that the cutting thickness cannot be adaptively adjusted according to the thickness of the material during the material cutting process.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An adaptive cutting thickness jigsaw includes: a jigsaw body, a connecting column fixedly installed on the lower surface of the jigsaw body, a connecting cylinder slidably installed on the outer surface of the connecting column, a base plate fixedly installed on the lower surface of the connecting cylinder, and a thickness adjustment mechanism rotatably installed between the base plate and the jigsaw body.

[0008] Preferably, a Y-shaped frame is fixedly installed at one end of the lower surface of the jigsaw body, a rotating column is installed in the Y-shaped frame with damping, and a laser rangefinder sensor is inserted into the rotating column.

[0009] Preferably, a torsion plate is fixedly installed at one end of the rotating column, and the torsion plate extends out from the Y-shaped frame, so that the torsion plate can drive the laser range sensor to tilt at an angle by twisting the rotating column.

[0010] Preferably, the thickness adjustment mechanism includes two sets of U-shaped frames, which are respectively fixedly installed on the lower surface of the jigsaw body and the upper surface of the base plate. Two sets of connecting arms are rotatably installed at both ends of each set of U-shaped frames, and a connecting block is rotatably installed between the two sets of connecting arms at both ends of the upper U-shaped frame and the other end of the two sets of connecting arms at both ends of the lower U-shaped frame.

[0011] Preferably, one end of one set of connecting blocks is fixedly equipped with an electric push rod, and the piston rod of the electric push rod is fixedly connected to another set of connecting blocks. This allows the electric push rod to push or pull the other set of connecting blocks through the piston rod, so that the two sets of connecting blocks can be pushed or pulled synchronously towards the center or outward, thereby extending the connecting arm into a vertical position to increase its height, or pushing it into an inclined position to decrease its height.

[0012] Preferably, the electric actuator is controlled by a controller, and the signal input terminal of the controller is connected to the signal output terminal of the laser rangefinder. The laser rangefinder and the controller are model L-GAGELH and RS-485, respectively.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. Through the design of the jigsaw body, base plate, Y-shaped frame, laser rangefinder, and thickness adjustment mechanism, when cutting sheet metal, the operator can place the base plate of the jigsaw body onto the sheet metal. The laser rangefinder, which is rotatably mounted inside the Y-shaped frame on the lower surface of the jigsaw body, directly illuminates one end of the sheet metal through the perforation between the base plates. Before cutting the sheet metal, the operator can twist the torsion plate to rotate the rotating column within the Y-shaped frame, thereby causing the rotating column to rotate the laser rangefinder. This allows the laser rangefinder to illuminate one end of the sheet metal at an inclined angle. By measuring the straight-line distance L1 between the reflection point of the laser beam on the upper surface of the sheet metal and the laser rangefinder, and combining this with the preset tilt angle θ, the actual thickness of the sheet metal, h = L1 × sinθ, can be calculated using trigonometric functions. The laser rangefinder sends the thickness information of the sheet material to the controller, which then controls the thickness adjustment mechanism to push or pull the distance between the base plate and the jigsaw body. Since the position of the saw blade within the jigsaw body remains constant, pushing or pulling the base plate adjusts the length of the saw blade extending to the bottom of the base plate, thus enabling adaptive adjustment of the saw blade length based on the sheet material thickness. This eliminates the need for frequent manual adjustments to accommodate different sheet thicknesses. When cutting sheets of varying thicknesses in batches, the adaptive adjustment function quickly adjusts the saw blade length according to the sheet thickness, reducing preparation time before each cut and improving overall cutting efficiency. It also prevents wobbling caused by an excessively long saw blade or incomplete cutting caused by an excessively short blade, reducing burrs and chipping.

[0015] 2. Through the design of the U-shaped frame, connecting arm, connecting block, and electric push rod, the laser rangefinder calculates the thickness information of the plate and sends it to the controller. The controller then controls the electric push rod to push or pull the connecting block via the piston rod. This allows the two sets of connecting blocks to be simultaneously pulled towards the center or pushed outwards. When the two sets of connecting blocks are pulled towards the center, they pull the connecting arm, which is rotatably mounted between the two U-shaped frames, extending it from a horizontal to a vertical position to increase the distance between the two U-shaped frames. Alternatively, when the connecting arm is pushed outwards by the two sets of connecting blocks, the vertical connecting arm is extended into an inclined position to reduce the distance between the two U-shaped frames. This, in turn, allows the U-shaped frame to... The distance between the base plate and the jigsaw body is adjusted by pushing or lifting the frame, while the position of the saw blade inside the jigsaw body remains constant. This allows the length of the saw blade extending to the lower end of the base plate to be adjusted accordingly, enabling adaptive adjustment of the saw blade length based on the thickness of the material. This ensures that the saw blade maintains the optimal cutting depth ratio when cutting materials of different thicknesses. For example, when cutting thin materials, the saw blade will not extend too far beyond the base plate, thus avoiding uneven cut surfaces caused by overcutting. This results in more even force distribution on the saw blade during cutting, leading to smoother cut surfaces and reducing the amount of subsequent finishing work. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the adaptive cutting thickness jigsaw of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the laser ranging sensor of this utility model;

[0018] Figure 3 This is a schematic diagram of the thickness adjustment mechanism of this utility model.

[0019] In the diagram: 1. Jigsaw body; 101. Connecting column; 102. Base plate; 103. Connecting cylinder; 104. Y-shaped frame; 105. Laser rangefinder sensor; 106. Rotating column; 107. Torsion plate; 2. Thickness adjustment mechanism; 201. U-shaped frame; 202. Connecting arm; 203. Connecting block; 204. Electric push rod. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figures 1-2 As shown, this embodiment provides a jigsaw with adaptive cutting thickness, including: a jigsaw body 1, a connecting column 101 fixedly installed on the lower surface of the jigsaw body 1, a connecting cylinder 103 slidably installed on the outer surface of the connecting column 101, a base plate 102 fixedly installed on the lower surface of the connecting cylinder 103, a thickness adjustment mechanism 2 rotatably installed between the base plate 102 and the jigsaw body 1, a Y-shaped frame 104 fixedly installed at one end of the lower surface of the jigsaw body 1, a rotating column 106 damped and rotatably installed inside the Y-shaped frame 104, a laser rangefinder sensor 105 inserted into the rotating column 106, and a torsion piece 107 fixedly installed at one end of the rotating column 106. The torsion piece 107 rotates out from inside the Y-shaped frame 104, so that the torsion piece 107 can drive the laser rangefinder sensor 105 to tilt at an angle by twisting the rotating column 106.

[0022] Through the design of the jigsaw body 1, base plate 102, Y-shaped frame 104, laser rangefinder 105, and thickness adjustment mechanism 2, when cutting sheet metal, the operator can place the base plate 102 of the jigsaw body 1 onto the sheet metal, allowing the laser rangefinder 105, which is rotatably mounted inside the Y-shaped frame 104 on the lower surface of the jigsaw body 1, to directly irradiate one end of the sheet metal through the perforation between the base plates 102. Before cutting the sheet metal, the operator can rotate the rotating column 106 within the Y-shaped frame 104 by twisting the torsion plate 107, thereby causing the rotating column 106 to rotate the laser rangefinder 105. This allows the laser rangefinder 105 to irradiate one end of the sheet metal at an inclined angle. By measuring the straight-line distance L1 between the reflection point of the laser beam on the upper surface of the sheet metal and the laser rangefinder 105, and combining this with the preset tilt angle θ, the actual thickness of the sheet metal can be calculated using trigonometric functions. The degree h = L1 × sinθ, which allows the laser rangefinder 105 to send the thickness information of the board to the controller. The controller then controls the thickness adjustment mechanism 2 to push or pull the distance between the base plate 102 and the jigsaw body 1. The position of the saw blade inside the jigsaw body 1 remains unchanged. This allows the length of the saw blade extending to the lower end of the base plate 102 to be reduced or increased after the base plate 102 is pushed or pulled. This enables the saw blade length to be adaptively adjusted according to the thickness of the board, eliminating the need for operators to manually and frequently adjust the saw blade length to adapt to different board thicknesses. When cutting boards of different thicknesses in batches, the adaptive adjustment function can quickly adjust the saw blade length according to the board thickness, reducing the preparation time before each cut and thus improving the overall cutting efficiency. It can also avoid swaying caused by an excessively long saw blade or incomplete cutting caused by an excessively short saw blade, thereby reducing problems such as burrs and chipping.

[0023] like Figure 3As shown, the thickness adjustment mechanism 2 includes two sets of U-shaped frames 201. The two sets of U-shaped frames 201 are fixedly installed on the lower surface of the jigsaw body 1 and the upper surface of the base plate 102, respectively. Two sets of connecting arms 202 are rotatably installed at both ends of the two sets of connecting arms 202 at both ends of the upper U-shaped frame 201 and the other end of the two sets of connecting arms 202 at both ends of the lower U-shaped frame 201. A connecting block 203 is rotatably installed between the two sets of connecting arms 202 at both ends of the upper U-shaped frame 201 and the other end of the two sets of connecting arms 202 at both ends of the lower U-shaped frame 201.

[0024] One end of one set of connecting blocks 203 is fixedly mounted with an electric push rod 204. The piston rod of the electric push rod 204 is fixedly connected to another set of connecting blocks 203. This allows the electric push rod 204 to push or pull the other set of connecting blocks 203 through the piston rod, so that the two sets of connecting blocks 203 can be pushed or pulled synchronously towards the center or outward. This enables the connecting arm 202 to be stretched into a vertical position to increase its height, or pushed into an inclined position to decrease its height. The electric push rod 204 is controlled by a controller. The signal input terminal of the controller is connected to the signal output terminal of the laser rangefinder 105. The laser rangefinder 105 and the controller are model L-GAGELH and RS-485, respectively.

[0025] Through the design of the U-shaped frame 201, connecting arm 202, connecting block 203, and electric push rod 204, the laser rangefinder 105 calculates the thickness information of the plate and sends it to the controller. The controller then controls the electric push rod 204 to push or pull the connecting block 203 via the piston rod. This allows the two sets of connecting blocks 203 to be pulled synchronously towards the center or pushed outwards. When the two sets of connecting blocks 203 are pulled synchronously towards the center, they pull the connecting arm 202, which is rotatably mounted between the two sets of U-shaped frames 201, extending it from a horizontal position to a vertical position to increase the distance between the two sets of U-shaped frames 201. Alternatively, when the connecting arm 202 is pushed outwards by the two sets of connecting blocks 203, the vertical connecting arm 202 is extended into an inclined position to reduce the distance between the two sets of U-shaped frames. The spacing between 201 allows the U-shaped frame 201 to push or lift the distance between the base plate 102 and the jigsaw body 1. Since the position of the saw blade inside the jigsaw body 1 remains unchanged, the length of the saw blade extending to the lower end of the base plate 102 will be reduced or increased after the base plate 102 is pushed or lifted. This enables the saw blade length to be adaptively adjusted according to the thickness of the board, so that the saw blade can always maintain the optimal cutting depth ratio when cutting boards of different thicknesses. For example, when cutting thin boards, the saw blade will not extend too far beyond the base plate 102, thereby avoiding uneven cutting surfaces caused by excessive cutting. This makes the force on the saw blade more uniform during cutting, resulting in a smoother cutting surface and reducing the amount of subsequent finishing work on the cutting surface.

[0026] Based on the above technical solution, the working steps of this solution are summarized as follows: When cutting the sheet metal, the operator can place the base plate 102 of the jigsaw body 1 onto the sheet metal, allowing the laser rangefinder 105, which is rotatably mounted in the Y-shaped frame 104 on the lower surface of the jigsaw body 1, to directly irradiate one end of the sheet metal through the perforation between the base plates 102. Before cutting the sheet metal, the operator can rotate the rotating column 106 within the Y-shaped frame 104 by twisting the torsion plate 107. This rotation of the rotating column 106 will cause the laser rangefinder 105 to rotate, allowing it to irradiate one end of the sheet metal at an inclined angle. By measuring the straight-line distance L1 between the reflection point of the laser beam on the upper surface of the sheet metal and the laser rangefinder 105, and combining this with the preset tilt angle θ, the actual thickness h of the sheet metal can be calculated using trigonometric functions: h = L1 × sinθ. Subsequently, the laser rangefinder 105 can send the sheet metal thickness information to the controller, allowing the controller to... The electric actuator 204 pushes or pulls the connecting blocks 203 via the piston rod, causing the two sets of connecting blocks 203 to be pulled synchronously towards the center or pushed outward. When the two sets of connecting blocks 203 are pulled synchronously towards the center, they pull the connecting arms 202 rotatably mounted between the two sets of U-shaped frames 201, extending them from a horizontal position to a vertical position to increase the distance between the two sets of U-shaped frames 201. Alternatively, when the connecting arms 202 are pushed outward by the two sets of connecting blocks 203, they can... The vertical connecting arm 202 can be extended into an inclined position to reduce the distance between the two sets of U-shaped frames 201. This allows the U-shaped frame 201 to push or lift the distance between the base plate 102 and the jigsaw body 1. The position of the saw blade inside the jigsaw body 1 remains unchanged. This allows the length of the saw blade extending to the lower end of the base plate 102 to be reduced or increased after the base plate 102 is pushed or lifted. This enables the saw blade length to be adaptively adjusted according to the thickness of the board.

[0027] In summary, this system allows for adaptive adjustment of the saw blade length based on the thickness of the board material. This eliminates the need for operators to manually adjust the blade length frequently to accommodate different thicknesses. When cutting boards of varying thicknesses in batches, the adaptive adjustment function can quickly adjust the saw blade length according to the board thickness, reducing preparation time before each cut and thus improving overall cutting efficiency. It also avoids wobbling caused by an excessively long saw blade or incomplete cutting caused by an excessively short saw blade, thereby reducing problems such as burrs and chipping.

[0028] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A jigsaw with adaptive cutting thickness, characterized in that, include: A jigsaw body (1) has a connecting column (101) fixedly installed on its lower surface. A connecting cylinder (103) is slidably installed on the outer surface of the connecting column (101). A base plate (102) is fixedly installed on the lower surface of the connecting cylinder (103). A thickness adjustment mechanism (2) is rotatably installed between the base plate (102) and the jigsaw body (1). The thickness adjustment mechanism (2) includes two sets of U-shaped frames (201). The two sets of U-shaped frames (201) are respectively fixedly installed on the lower surface of the jigsaw body (1) and the upper surface of the base plate (102). Two sets of connecting arms (202) are rotatably installed at both ends of the two sets of U-shaped frames (201). A connecting block is rotatably installed between the two sets of connecting arms (202) at both ends of the upper U-shaped frame (201) and the other end of the two sets of connecting arms (202) at both ends of the lower U-shaped frame (201). 203); One end of one of the connecting blocks (203) is fixedly installed with an electric push rod (204). The piston rod of the electric push rod (204) is fixedly connected to another connecting block (203). When the electric push rod (204) pushes or pulls the other connecting block (203) through the piston rod, the two connecting blocks (203) can be pushed or pulled synchronously towards the center or outward, so as to stretch the connecting arm (202) into a vertical shape to increase its height, or push it into an inclined shape to decrease its height.

2. The adaptive cutting thickness jigsaw according to claim 1, characterized in that: A Y-shaped frame (104) is fixedly installed on one end of the lower surface of the jigsaw body (1). A rotating column (106) is installed in the Y-shaped frame (104) with damping. A laser rangefinder sensor (105) is inserted into the rotating column (106).

3. A jigsaw with adaptive cutting thickness according to claim 2, characterized in that: A torsion piece (107) is fixedly installed at one end of the rotating column (106). The torsion piece (107) passes through the Y-shaped frame (104) so ​​that the torsion piece (107) can drive the laser range sensor (105) to tilt at an angle by twisting the rotating column (106).

4. A jigsaw with adaptive cutting thickness according to claim 3, characterized in that: The electric push rod (204) is controlled by a controller, and the signal input terminal of the controller is connected to the signal output terminal of the laser rangefinder (105).

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