A circular saw machine with a safety shield
Patent Information
- Application Number
- CN202522023797.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-19
- Publication Date
- 2026-08-21
- Estimated Expiration
- 2035-09-19
AI Technical Summary
[0002]然而，多数圆锯机的护罩与工作台缺乏精准的导向闭锁机制，护罩的开合状态与工作台的摆动位置无法形成有效联动，在木材装载阶段可能因工作台意外向锯片方向移动导致安全隐患，而切割阶段又可能因护罩意外翻开使锯片暴露，使得现有圆锯机在安全防护的可靠性上仍有欠缺，难以满足小型加工场景中对操作安全与便捷性的双重需求
本申请提供一种具有安全护罩的圆锯机，通过将弧形导轨和导向板的弧线圆心设置为工作台与机架的摆动回转中心，在装载物料时，利用导向板与弧形导轨前端的接触限制工作台向锯片摆动，保障了装载过程的安全性；在切割物料时，借助弧形导轨对导向板的限制，使安全护罩保持闭锁，避免了切割过程中安全护罩意外翻开的情况，有效防止人员受伤，极大地提升了圆锯机工作时的安全性与可靠性。
Smart Images
Figure CN224659683U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wood processing equipment technology, and in particular to a circular saw with a safety guard. Background Technology Circular saws, as essential equipment in the woodworking industry, are widely used in small timber factories, furniture making, and other scenarios. They use a motor-driven saw blade to rotate at high speed to cut wood, greatly improving the efficiency of wood processing. With increasing safety awareness, operators have placed higher demands on the safety features of circular saws, especially during the high-speed rotation of the saw blade, to prevent direct contact between the human body and the saw blade or accidents caused by accidental movement of wood.
[0002] However, most circular saws lack a precise guiding and locking mechanism between the guard and the worktable. The opening and closing state of the guard and the swing position of the worktable cannot be effectively linked. During the timber loading stage, the worktable may accidentally move towards the saw blade, causing safety hazards. During the cutting stage, the guard may accidentally flip open, exposing the saw blade. As a result, existing circular saws are still lacking in the reliability of safety protection and cannot meet the dual requirements of operational safety and convenience in small processing scenarios. Summary of the Invention
[0003] To address the above problems, this utility model provides a circular saw with a safety guard, comprising a frame, a motor mounted on the frame, a saw blade connected to the output end of the motor, an outer guard fixed to the frame and covering the outside of the saw blade, a worktable hinged to one side of the frame, and a safety guard hinged to the worktable. The outer guard is provided with an arc-shaped guide rail, and a guide plate matching the arc-shaped guide rail is fixedly installed on the safety guard. The arc of the guide plate is concentric with the arc of the arc-shaped guide rail, and the center of both arcs is the hinge center between the worktable and the frame.
[0004] In one embodiment, an inner protective cover is fixedly installed on the workbench, and the inner protective cover is provided with a motor shaft movement clearance hole; the inner protective cover is located on both sides of the saw blade.
[0005] In one embodiment, a linkage-type protective plate mechanism is provided between the outer protective cover and the inner protective cover; the linkage-type protective plate mechanism includes a main linkage rod rotatably mounted on the outer protective cover, a main linkage protective plate hinged to the other end of the main linkage rod, and the other end of the main linkage protective plate rotatably mounted on the inner protective cover; a secondary linkage rod is also rotatably provided on the outer protective cover, a secondary linkage protective plate hinged to the other end of the secondary linkage rod, and the other end of the secondary linkage protective plate rotatably mounted on the inner protective cover.
[0006] In one embodiment, an adjustable motor mount is provided on the frame, the adjustable motor mount including a fixed base and a swing plate; the fixed base is fixedly installed on the frame, the swing plate is connected to the fixed base through a hinge shaft and can rotate around the hinge shaft; the motor is mounted on the swing plate; the adjustable motor mount also includes a locking mechanism.
[0007] In one embodiment, a limiting plate is rotatably provided on the frame, and an L-shaped guide locking groove is formed on the limiting plate. The guide locking groove is composed of a long horizontal groove and a short vertical groove that are interconnected. One end of the limiting plate away from the short vertical groove is hinged to the frame via a pivot, and the other end of the limiting plate is hooked to a limiting shaft fixedly installed on the worktable via the guide locking groove.
[0008] In one embodiment, the wood loading area of the workbench is fixedly provided with several sets of positioning teeth to restrict the circumferential rotation of the wood to be processed.
[0009] In one embodiment, the frame is provided with wheels at the bottom and handrails on the frame.
[0010] In one embodiment, the safety shield is provided with a handle.
[0011] The beneficial effects of this utility model are as follows: This application provides a circular saw with a safety guard. By setting the center of the arc of the arc-shaped guide rail and the guide plate as the swing rotation center of the worktable and the frame, when loading materials, the contact between the guide plate and the front end of the arc-shaped guide rail restricts the swing of the worktable toward the saw blade, ensuring the safety of the loading process. When cutting materials, the arc-shaped guide rail restricts the guide plate, keeping the safety guard locked and preventing the safety guard from accidentally opening during the cutting process, effectively preventing personnel injury and greatly improving the safety and reliability of the circular saw during operation. Attached Figure Description
[0012] Figure 1 This is a front view of the present utility model; Figure 2 This is a schematic diagram of the structure of the present utility model. Figure One ; Figure 3 This is a schematic diagram of the structure after the outer protective cover has been removed. Figure 4 This is a front view after removing the outer protective cover; Figure 5 This is a schematic diagram of the structure of the present utility model. Figure Two ; Explanation of symbols in the diagram: 1. Frame; 11. Motor; 12. Saw blade; 13. Traveling wheels; 14. Handrail; 2. Outer protective cover; 21. Arc-shaped guide rail; 3. Worktable; 31. Positioning teeth; 4. Safety guard; 41. Guide plate; 42. Handle; 5. Inner protective cover; 51. Motor shaft movement clearance hole; 6. Linkage-type protective plate mechanism; 61. Main linkage rod; 62. Main linkage protective plate; 63. Secondary linkage rod; 64. Secondary linkage protective plate; 7. Adjustable motor base; 71. Fixed base; 72. Swinging support plate; 73. Locking mechanism; 8. Limiting plate; 81. Guide lock groove. Detailed Implementation
[0013] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0014] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0015] like Figure 1 , 2 As shown in Figure 3, a circular saw with a safety guard includes a frame 1, a motor 11 mounted on the frame 1, a saw blade 12 connected to the output end of the motor 11, an outer guard 2 fixed on the frame 1 and covering the outside of the saw blade 12, a workbench 3 hinged to one side of the frame 1, and a safety guard 4 hinged to the workbench 3. The outer guard 2 is provided with an arc-shaped guide rail 21, and the safety guard 4 is fixedly installed with a guide plate 41 that matches the arc-shaped guide rail 21. The arc of the guide plate 41 is concentric with the arc of the arc-shaped guide rail 21, and the center of both is the hinge center of the workbench 3 and the frame 1.
[0016] Specifically, the frame 1 serves as the support structure for the entire machine, on which the motor 11 and the outer cover 2 are fixedly mounted. The output end of the motor 11 is connected to the saw blade 12, and the outer cover 2 covers the outside of the saw blade 12. The workbench 3 is bolted to one side of the frame 1 and can swing left and right relative to the frame 1. The safety cover 4 is hinged to the workbench 3 and can swing upward relative to the workbench 3. The safety cover 4 is equipped with a handle 42 for easy opening or closing. The outer cover 2 has an arc-shaped guide rail 21 formed by an arc-shaped elongated protrusion, and a guide plate 41 matching the shape of the arc-shaped guide rail 21 is fixedly mounted on the safety cover 4. When the equipment is running, the workbench 3 swings to its maximum angle, i.e., the wood loading position, and the safety cover 4 can be flipped upward. At this time, the upper edge of the guide plate 41 contacts the front end of the arc-shaped guide rail 21. Under the restriction of the arc-shaped guide rail 21, the workbench 3 cannot swing towards the saw blade 12, ensuring safety when loading materials. When the safety guard 4 is closed, and the worktable 3 swings towards the saw blade 12 for cutting, the arc-shaped guide rail 21 can be embedded in the guide plate 41. Since the guide plate 41 and the arc-shaped guide rail 21 are concentric arc structures, and the center of the arc coincides with the hinge center of the worktable 3 and the frame 1, the safety guard 4 cannot be flipped up under the constraint of the arc-shaped guide rail 21 and remains locked, ensuring that the operator cannot contact the saw blade 12 during the cutting operation. In this application, by setting the arc center of the arc of the arc-shaped guide rail 21 and the guide plate 41 as the swing rotation center of the worktable 3 and the frame 1, when loading materials, the contact between the guide plate 41 and the front end of the arc-shaped guide rail 21 restricts the swing of the worktable 3 towards the saw blade 12, ensuring the safety of the loading process; when cutting materials, the restriction of the guide plate 41 by the arc-shaped guide rail 21 keeps the safety guard 4 locked, avoiding the accidental opening of the safety guard 4 during the cutting process, effectively preventing personnel injury, and greatly improving the safety and reliability of the circular saw machine during operation.
[0017] like Figure 4 As shown, an inner protective cover 5 is fixedly installed on the workbench 3, and a motor shaft movable clearance hole 51 is provided on the inner protective cover 5; the inner protective cover 5 is located on both sides of the saw blade 12.
[0018] Specifically, an inner protective cover 5 is fixedly installed on the workbench 3 and positioned on both sides of the saw blade 12. At the same time, a motor shaft movement avoidance hole 51 is opened on the inner protective cover 5. This provides space for the inner protective cover 5 to move as the workbench 3 moves, avoiding structural interference between the two and ensuring that the inner protective cover 5 can move synchronously with the workbench 3. The inner protective cover 5 is always positioned on both sides of the saw blade 12 and can continuously cover the dangerous area of the saw blade 12. No matter how the workbench 3 swings or moves, it can effectively prevent the operator from directly contacting the high-speed rotating saw blade 12, thus improving operational safety.
[0019] like Figure 1 , 2As shown, a linkage-type protective plate mechanism 6 is provided between the outer protective cover 2 and the inner protective cover 5; the linkage-type protective plate mechanism 6 includes a main linkage rod 61 rotatably mounted on the outer protective cover 2, and a main linkage protective plate 62 is hinged to the other end of the main linkage rod 61, and the other end of the main linkage protective plate 62 is rotatably mounted on the inner protective cover 5; a secondary linkage rod 63 is also rotatably provided on the outer protective cover 2, and a secondary linkage protective plate 64 is hinged to the other end of the secondary linkage rod 63, and the other end of the secondary linkage protective plate 64 is rotatably mounted on the inner protective cover 5.
[0020] Specifically, by setting up a linkage protection mechanism consisting of a main linkage rod 61, a main linkage protective plate 62, a secondary linkage rod 63, and a secondary linkage protective plate 64 between the outer protective cover 2 and the inner protective cover 5, and adopting a multi-point rotatable connection method, this structure allows the protective plate to adaptively adjust its opening and closing state when the worktable 3 swings: when loading materials, the protective plate closes to completely cover the motor shaft movement avoidance hole 51 of the inner protective cover 5, forming a continuous physical barrier; when cutting materials, the protective plate precisely unfolds and provides an unobstructed movement channel for the motor shaft. Without the need for an external power source, the automatic matching of the protection state and the working mode can be achieved, which not only eliminates the risk of motion interference, but also ensures that the saw blade 12 is in a closed and safe space throughout the operation, significantly improving the safety and reliability of the equipment.
[0021] like Figure 4 As shown, an adjustable motor base 7 is provided on the frame 1. The adjustable motor base 7 includes a fixed base 71 and a swing plate 72. The fixed base 71 is fixedly installed on the frame 1. The swing plate 72 is connected to the fixed base 71 through a hinge shaft and can rotate around the hinge shaft. The motor 11 is installed on the swing plate 72. The adjustable motor base 7 also includes a locking mechanism 73.
[0022] Specifically, the adjustable motor mount 7 on the frame 1, through the hinged structure of the fixed base 71 and the swing plate 72, allows for flexible adjustment of the motor 11 position. The swing plate 72 can rotate around the hinge axis, facilitating precise adjustment of the motor 11's posture according to actual needs (such as tension adjustment in belt drive), adapting to installation and operation requirements under different working conditions. The stable connection between the fixed base 71 and the frame 1 provides reliable support for the overall structure, while the locking mechanism 73 can quickly lock the swing plate 72 after the motor 11 is adjusted to the correct position, ensuring the motor 11 remains stable during operation and preventing positional displacement due to vibration or external forces. This design achieves flexible adjustment of the motor 11's installation position, ensures the stability of equipment operation, simplifies the operation process for motor 11 maintenance and debugging, and improves the adaptability and ease of use of the equipment.
[0023] like Figure 1 , 5As shown, a limit plate 8 is rotatably provided on the frame 1. The limit plate 8 has an L-shaped guide lock groove 81, which is composed of a long horizontal groove and a short vertical groove that are interconnected. One end of the limit plate 8 away from the short vertical groove is hinged to the frame 1 through a rotating shaft, and the other end is hooked to the limit shaft fixedly installed on the worktable 3 through the guide lock groove 81.
[0024] Specifically, when the equipment is in operation, the operator only needs to lift the limiting plate 8, and the limiting shaft of the worktable 3 can slide smoothly in the long horizontal groove of the limiting plate 8, thereby driving the worktable 3 to swing flexibly to a position that meets the sawing requirements, ensuring stable wood sawing operations. When the equipment is not in operation, the limiting shaft of the worktable 3 will naturally fall into the short vertical groove of the limiting plate 8. The short vertical groove can effectively lock and limit the limiting shaft, thereby strictly limiting the swing of the worktable 3 and preventing the worktable 3 from accidentally moving towards the saw blade 12 due to accidental touch or misoperation. Structurally, it prevents the occurrence of safety accidents in the non-operation state, significantly improving the overall operational safety and ease of use of the circular saw.
[0025] like Figure 1 As shown, the wood loading area of the workbench 3 is provided with several sets of positioning teeth 31. The positioning teeth 31 are fixedly installed on the surface of the workbench 3 to restrict the circumferential rotation of the wood to be processed.
[0026] Specifically, in actual wood processing operations, after the wood is placed on the workbench 3, the positioning teeth 31 can make close contact with the surface of the wood, forming an effective barrier and constraint, which greatly restricts the circumferential rotation of the wood to be processed. This avoids problems such as the cutting position shift and inaccurate cutting dimensions caused by the rotation of the wood during cutting or processing, effectively improving the precision and quality of wood processing. At the same time, it also reduces the risk of equipment damage caused by the rotation of the wood, as well as safety hazards such as operator injury caused by the uncontrolled rotation of the wood, thus improving the stability, safety and processing efficiency of the circular saw during operation.
[0027] like Figure 1 , 3 As shown, the bottom of the frame 1 is provided with travel wheels 13, and the frame 1 is provided with handrails 14.
[0028] Specifically, the travel wheels 13 give it mobility, and operators can easily move the equipment between different work sites by using the handles 14, which greatly reduces the labor intensity of handling.
[0029] This utility model discloses a circular saw with a safety guard. When the machine is running, the worktable 3 swings to its maximum angle, i.e., the timber loading position, and the safety guard 4 can be flipped upwards. At this time, the upper edge of the guide plate 41 contacts the front end of the arc-shaped guide rail 21. Under the constraint of the arc-shaped guide rail 21, the worktable 3 cannot swing towards the saw blade 12, ensuring safety when loading materials. When the safety guard 4 is closed, and the worktable 3 swings towards the saw blade 12 for cutting operations, the arc-shaped guide rail 21 can be embedded in the guide plate 41. Since the guide plate 41 and the arc-shaped guide rail 21 are concentric arc structures, and the center of the arc coincides with the hinge center of the worktable 3 and the frame 1, the safety guard 4 cannot be flipped upwards under the constraint of the arc-shaped guide rail 21, always remaining in a locked state, ensuring that the operator cannot contact the saw blade 12 during cutting operations. In this application, by setting the center of the arc of the arc guide rail 21 and the guide plate 41 as the swing rotation center of the workbench 3 and the frame 1, when loading materials, the contact between the guide plate 41 and the front end of the arc guide rail 21 restricts the swing of the workbench 3 toward the saw blade 12, ensuring the safety of the loading process; when cutting materials, the restriction of the guide plate 41 by the arc guide rail 21 keeps the safety cover 4 locked, avoiding the accidental opening of the safety cover 4 during the cutting process, effectively preventing personnel injury, and greatly improving the safety and reliability of the circular saw machine during operation.
[0030] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.
[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
Claims
1. A circular saw with a safety guard, comprising a frame (1), a motor (11) mounted on the frame (1), a saw blade (12) connected to the output end of the motor (11), an outer guard (2) fixed to the frame (1) and covering the outside of the saw blade (12), a worktable (3) hinged to one side of the frame (1), and a safety guard (4) hinged to the worktable (3), characterized in that: The outer cover (2) is provided with an arc-shaped guide rail (21), and the safety cover (4) is fixedly installed with a guide plate (41) that matches the arc-shaped guide rail (21); the arc of the guide plate (41) is concentric with the arc of the arc-shaped guide rail (21), and the center of the circle is the hinge center of the workbench (3) and the frame (1).
2. A circular saw with a safety guard according to claim 1, characterized in that, An inner cover (5) is fixedly installed on the workbench (3), and a motor shaft movable clearance hole (51) is provided on the inner cover (5); the inner cover (5) is located on both sides of the saw blade (12).
3. A circular saw with a safety guard according to claim 2, characterized in that, A linkage protective plate mechanism (6) is provided between the outer protective cover (2) and the inner protective cover (5); the linkage protective plate mechanism (6) includes a main linkage rod (61) rotatably mounted on the outer protective cover (2), and a main linkage protective plate (62) is hinged to the other end of the main linkage rod (61), and the other end of the main linkage protective plate (62) is rotatably mounted on the inner protective cover (5); a secondary linkage rod (63) is also rotatably provided on the outer protective cover (2), and a secondary linkage protective plate (64) is hinged to the other end of the secondary linkage rod (63), and the other end of the secondary linkage protective plate (64) is rotatably mounted on the inner protective cover (5).
4. A circular saw with a safety guard according to claim 1, characterized in that, An adjustable motor mount (7) is provided on the frame (1). The adjustable motor mount (7) includes a fixed base (71) and a swing plate (72). The fixed base (71) is fixedly installed on the frame (1). The swing plate (72) is connected to the fixed base (71) through a hinge shaft and can rotate around the hinge shaft. The motor (11) is installed on the swing plate (72). The adjustable motor mount (7) also includes a locking mechanism (73).
5. A circular saw with a safety guard according to claim 1, characterized in that, A limiting plate (8) is rotatably provided on the frame (1). An L-shaped guide lock groove (81) is provided on the limiting plate (8). The guide lock groove (81) is composed of a long horizontal groove and a short vertical groove that are interconnected. One end of the limiting plate (8) away from the short vertical groove is hinged to the frame (1) through a rotating shaft. The other end of the limiting plate (8) is hooked to a limiting shaft fixedly installed on the worktable (3) through the guide lock groove (81).
6. A circular saw with a safety guard according to claim 1, characterized in that, The workbench (3) has several sets of positioning teeth (31) fixedly installed in the wood loading area to restrict the circumferential rotation of the wood to be processed.
7. A circular saw with a safety guard according to claim 1, characterized in that, The bottom of the frame (1) is provided with travel wheels (13), and the frame (1) is provided with handrails (14).
8. A circular saw with a safety guard according to claim 1, characterized in that, The safety cover (4) is provided with a handle (42).