A band saw with stepless speed regulation

Abstract

This utility model discloses a continuously variable speed band saw, belonging to the technical field of cutting equipment. The continuously variable speed band saw includes a machine body, an electrical assembly mounted on one side of the machine body, a top cover mounted on the top of the machine body, and a lower housing mounted on the bottom of the machine body. A worktable assembly is mounted on the lower housing. An upper wheel is mounted inside the top cover, and a lower wheel is rotatably mounted inside the lower housing. A saw blade is installed between the upper and lower wheels. A mounting plate is mounted on one side of the lower housing, and a DC motor is fixedly connected to one side of the mounting plate. It can use a DC motor in conjunction with a driver, and by reasonably selecting and adjusting the sawing speed, it can achieve continuously variable speed control, ensuring the quality and efficiency of material processing. It is suitable for various types of material cutting needs, has a simple structure, and high cost-effectiveness, solving the problem of insufficient power at low speeds that easily occurs in traditional speed control methods.

Description

Technical Field

[0001] This utility model relates to the field of cutting equipment technology, and more specifically, to a band saw with stepless speed regulation. Background Technology

[0002] A band saw is a device that uses a circular band saw blade as its core cutting tool, primarily used for cutting materials such as wood or soft metals. The motor drives the lower wheel via a belt drive, and the tensioned saw blade and the friction between the upper and lower wheels drive the upper wheel to rotate at high speed. The material to be cut is placed on the lower housing and fed at a constant speed manually or by a pressure feeder, cutting the material through the reciprocating motion of the saw blade. Cutting speed directly affects the sawing quality. Different materials have different properties and cutting characteristics; therefore, when using a band saw, the cutting speed for various materials must be considered and adjusted comprehensively based on the material hardness, equipment power, and operating parameters. Excessive speed may cause saw blade vibration or slippage; insufficient speed increases cutting force and easily produces defects such as burrs.

[0003] Based on the above, the inventors have discovered that some band saws on the market operate at a constant speed, limiting their speed to cutting only specific materials; while some band saws have adjustable speeds, they rely on frequency converters for precise speed control, resulting in high speed control complexity, reduced torque at low speeds, weak starting performance, and limited overload capacity. Furthermore, these band saws are structurally complex and expensive. Therefore, in view of this, the inventors have researched and improved upon existing structures to provide a band saw with stepless speed regulation, aiming to achieve greater practical value. Summary of the Invention

[0004] 1. Technical problems to be solved To address the problems existing in the prior art, the purpose of this utility model is to provide a band saw with stepless speed regulation. It can use a DC motor in conjunction with a driver and achieve stepless speed regulation by reasonably selecting and adjusting the sawing speed. This can ensure the quality and efficiency of material processing, and is suitable for various types of material cutting needs. It has a simple structure and high cost performance, and solves the problem of insufficient power at low speeds that is prone to occur in traditional speed regulation methods.

[0005] 2. Technical Solution To solve the above problems, the present invention adopts the following technical solution.

[0006] A continuously variable speed band saw includes a body, an electrical assembly mounted on one side of the body, a top cover mounted on the top of the body, a lower housing mounted on the bottom of the body, a worktable assembly mounted on the lower housing, an upper wheel mounted inside the top cover, a lower wheel rotatably mounted inside the lower housing, a saw blade mounted between the upper and lower wheels, a mounting plate mounted on one side of the lower housing, a DC motor fixedly connected to one side of the mounting plate, the output shaft of the DC motor extending into the lower housing and connected to a pulley via a coupling, the pulley being connected to the lower wheel via a belt.

[0007] Furthermore, the bottom of the mounting plate is provided with a fixing round hole, and the mounting plate is fixed to one side of the lower box body through the fixing round hole and with bolts.

[0008] Furthermore, the top of the mounting plate is provided with an adjustment elongated hole, and a threaded guide post is fixedly connected to one side of the lower housing. The threaded guide post passes through the adjustment elongated hole and is threadedly connected to a fastening nut.

[0009] Furthermore, the electrical assembly includes a panel fixedly installed on one side of the machine body. A display screen, a speed control knob, and a switch are provided on one side of the panel, and a driver is installed on the other side of the panel. The display screen, speed control knob, switch, and DC motor are electrically connected to the driver via wires.

[0010] Furthermore, the workbench assembly includes a fixed base fixed to the top of the lower housing, an adjusting base slidably connected to the top of the fixed base, and a placement platform fixedly connected to the top of the adjusting base.

[0011] Furthermore, a fastening knob is threadedly connected to the fixed base, and the threaded end of the fastening knob extends to the inner side of the fixed base and abuts against the outer periphery of the adjusting base.

[0012] Furthermore, a material baffle is slidably connected to the placement platform.

[0013] 3. Beneficial effects Compared with existing technologies, the advantages of this utility model are: (1) This solution achieves stepless speed regulation of the band saw by using a DC motor in conjunction with a driver. Users can conveniently adjust the saw blade speed using the speed control knob on the electrical assembly, without relying on a complex frequency converter. This simplifies the speed regulation process and reduces the complexity and cost of the equipment structure. The DC motor can maintain a high torque output even at low speeds, ensuring smooth start-up of the saw blade and strong overload capacity, thus avoiding the power shortage problem that easily occurs at low speeds in traditional speed regulation methods.

[0014] (2) This solution allows for flexible adjustment of the position of the DC motor by using the adjustment elongated hole on the mounting plate in conjunction with the threaded guide post. This facilitates precise control of the belt tension, ensures the stability of the transmission system, reduces speed fluctuations caused by belt loosening, and thus improves the precision and surface quality of material cutting. It meets the different requirements of different materials for sawing speed, has a wider range of applications, and features a simple and compact overall structure with high cost performance. Attached Figure Description

[0015] Figure 1 This is a front view schematic diagram of the overall structure of this utility model; Figure 2 This is a rear-view schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the disassembled electrical assembly of this utility model; Figure 4 This is a schematic diagram of a partial structure of the DC motor of this utility model; Figure 5 This is a schematic diagram of the electrical schematic structure of this utility model.

[0016] Explanation of the labels in the diagram: 1. Organism; 2. Electrical assembly; 201. Panel; 202. Display screen; 203. Speed ​​control knob; 204. Switch; 205. Driver; 3. Top cover; 4. Lower box; 5. Workbench assembly; 501. Fixed base; 502. Adjustment base; 503. Placement platform; 504. Fastening knob; 505. Material baffle; 6. Mounting plate; 7. Fix the round hole; 8. Saw blade; 9. Adjust the elongated hole; 10. DC motor; 11. Threaded guide post. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. Example

[0018] Please see Figures 1-5A continuously variable speed band saw includes a body 1, an electrical assembly 2 mounted on one side of the body 1, a top cover 3 mounted on the top of the body 1, a lower housing 4 mounted on the bottom of the body 1, a worktable assembly 5 mounted on the lower housing 4, an upper wheel mounted inside the top cover 3, a lower wheel rotatably mounted inside the lower housing 4, a saw blade 8 mounted between the upper and lower wheels, a mounting plate 6 mounted on one side of the lower housing 4, a DC motor 10 fixedly connected to one side of the mounting plate 6, the output shaft of the DC motor 10 extending into the lower housing 4 and connected to a pulley via a coupling, the pulley being connected to the lower wheel via a belt.

[0019] See Figure 4 The bottom of the mounting plate 6 is provided with a fixing hole 7, and the mounting plate 6 is fixed to one side of the lower box 4 through the fixing hole 7 and with bolts.

[0020] See Figure 2 and Figure 4 The top of the mounting plate 6 is provided with an adjustment elongated hole 9, and a threaded guide post 11 is fixedly connected to one side of the lower housing 4. The threaded guide post 11 passes through the adjustment elongated hole 9 and is threadedly connected with a fastening nut.

[0021] See Figure 3 The electrical assembly 2 includes a panel 201 fixedly installed on one side of the body 1. A display screen 202, a speed control knob 203 and a switch 204 are provided on one side of the panel 201. A driver 205 is installed on the other side of the panel 201. The display screen 202, the speed control knob 203, the switch 204 and the DC motor 10 are electrically connected to the driver 205 through wires.

[0022] See Figure 2 The workbench assembly 5 includes a fixed base 501 fixed to the top of the lower housing 4, an adjusting base 502 slidably connected to the top of the fixed base 501, and a placement platform 503 fixedly connected to the top of the adjusting base 502.

[0023] See Figure 2 A fastening knob 504 is threadedly connected to the fixed seat 501. The threaded end of the fastening knob 504 extends to the inner side of the fixed seat 501 and abuts against the outer periphery of the adjusting seat 502.

[0024] See Figure 2 A material baffle 505 is slidably connected to the placement table 503.

[0025] In use: The DC motor 10 is connected to the mounting plate 6. A pulley is installed on the output shaft of the DC motor 10. The pulley drives the lower wheel to rotate via a belt, thereby driving the saw blade 8 to rotate and cut the material. The fixing hole 7 on the mounting plate 6 is fixed to the machine body 1. The DC motor 10 can swing left and right with the fixing hole 7 as the origin and the adjustment hole 9. When swinging counterclockwise, the DC motor 10 moves closer to the lower wheel and the belt can be loosened. When swinging clockwise, the DC motor 10 moves further away from the lower wheel and the belt can be tensioned.

[0026] The electrical assembly 2 is connected to the DC motor 10 via a cable. After the machine is powered on, pressing the switch 204 will start the machine. The display screen 202 will show the real-time operating speed of the saw blade 8. The speed adjustment knob 203 can adjust the operating speed of the saw blade 8. The speed increases when rotated clockwise and decreases when rotated counterclockwise. The operator can set the desired speed according to the different materials being cut. During use, the DC motor 10 has excellent speed adjustment performance, maintaining constant torque at both low and high speeds. It can also output high torque at low speeds, resulting in higher efficiency, lower noise, and a longer service life. This avoids the problem of insufficient power at low speeds that is common in traditional speed adjustment methods.

[0027] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A continuously variable speed band sawing machine comprising a machine body (1), characterised in that: An electrical assembly (2) is installed on one side of the machine body (1). A top cover (3) is installed on the top of the machine body (1). A lower housing (4) is installed on the bottom of the machine body (1). A workbench assembly (5) is provided on the lower housing (4). An upper wheel is installed inside the top cover (3). A lower wheel is rotatably installed inside the lower housing (4). A saw blade (8) is installed between the upper wheel and the lower wheel. A mounting plate (6) is installed on one side of the lower housing (4). A DC motor (10) is fixedly connected to one side of the mounting plate (6). The output shaft of the DC motor (10) extends into the lower housing (4) and is connected to a pulley via a coupling. The pulley is connected to the lower wheel via a belt.

2. A continuously variable speed band saw machine as claimed in claim 1 wherein: The mounting plate (6) has a fixing hole (7) at the bottom. The mounting plate (6) is fixed to one side of the lower box (4) through the fixing hole (7) and with bolts.

3. A continuously variable speed band saw machine as claimed in claim 1 wherein: The top of the mounting plate (6) is provided with an adjustment elongated hole (9), and a threaded guide post (11) is fixedly connected to one side of the lower housing (4). The threaded guide post (11) passes through the adjustment elongated hole (9) and is threadedly connected with a fastening nut.

4. A continuously variable speed band saw machine as claimed in claim 1 wherein: The electrical assembly (2) includes a panel (201) fixedly installed on one side of the body (1). A display screen (202), a speed control knob (203) and a switch (204) are provided on one side of the panel (201). A driver (205) is installed on the other side of the panel (201). The display screen (202), the speed control knob (203), the switch (204) and the DC motor (10) are electrically connected to the driver (205) through wires.

5. A continuously variable speed band saw machine as claimed in claim 1, wherein: The workbench assembly (5) includes a fixed seat (501) fixed to the top of the lower housing (4), an adjustment seat (502) is slidably connected to the top of the fixed seat (501), and a placement platform (503) is fixedly connected to the top of the adjustment seat (502).

6. A continuously variable speed band saw machine as claimed in claim 5 wherein: A fastening knob (504) is threadedly connected to the fixed seat (501). The threaded end of the fastening knob (504) extends to the inner side of the fixed seat (501) and abuts against the outer periphery of the adjusting seat (502).

7. A continuously variable speed band saw machine as claimed in claim 5 wherein: A material baffle (505) is slidably connected to the placement platform (503).

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