Electric circular saw with wood chip splinter protection

Abstract

This utility model relates to an electric circular saw that prevents wood chips from splashing. It includes an electric circular saw and a collection bin. The electric circular saw is fitted with a housing, and a connecting plate is connected to the chip outlet at the front end of the housing. The rear end of the collection bin is slidably connected to the connecting plate. Mounting plates are connected to both the front and rear ends of the bottom of the collection bin. Limiting frames are slidably connected to the mounting plates, and a first return spring is fitted onto the limiting frame. One end of the first return spring is connected to the mounting plate, and the other end is connected to the limiting frame. A mounting bracket is slidably connected to the bottom of the collection bin. An inclined surface is provided at the bottom of the limiting frame, and the limiting frame and mounting bracket are in a limiting fit. A filter screen is placed inside the mounting bracket. An unlocking component is provided on the bottom right side of the collection bin to release the limiting frame's restriction on the mounting bracket. The advantage is that the guide fit between the housing and the connecting plate forces splashed wood chips into the collection bin. The airflow channel structure of the filter screen allows air to pass through and be discharged, while the wood chips are blocked and settle, achieving the purpose of sealed wood chip collection.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and in particular to an electric circular saw that prevents wood chips from flying. Background Technology

[0002] A circular saw is a widely used electric cutting tool. Its core components include a high-speed rotating ring saw blade, a drive motor, and a base platform for support and guidance. It mainly uses the rotational motion of the saw blade to perform fast and efficient straight or curved cutting operations on wood materials such as timber and engineered wood products. It is an indispensable piece of equipment in fields such as construction, decoration, and woodworking.

[0003] When using existing circular saws for wood cutting, the high-speed rotating saw blade generates a large amount of fine sawdust during the moment of entry and exit from the wood, as well as throughout the cutting process. Under the combined effects of centrifugal force from the saw blade, airflow disturbance, and the elasticity of the wood itself, these sawdust particles fly and spread erratically at high speeds towards the operator and the surrounding environment. This scattering not only rapidly contaminates the work area and increases the cleanup burden, but also poses a potential safety and health threat to the operator's face, eyes, and respiratory system. Furthermore, the flying sawdust can obstruct vision and affect the accuracy of the operation.

[0004] Currently available conventional circular saws generally suffer from the significant drawback of sawdust scattering during operation. For specific work scenarios requiring strict control of sawdust dispersion, operators are forced to take temporary measures, such as attaching simple containers like plastic bags near the saw blade's cutting area to attempt to collect the scattering sawdust. However, this temporary measure has several disadvantages: plastic bags are difficult and unstable to secure, easily coming loose during equipment vibration or movement; their limited capacity means that the weight of the accumulated sawdust can cause the bag to accidentally fall off due to a shift in the center of gravity or insufficient load-bearing capacity; furthermore, the plastic bag obstructs the operator's view, affecting the observation of the cutting line and the ease of operation. Utility Model Content

[0005] The technical problem to be solved by this invention is unreliable chip handling. This invention provides an electric circular saw that prevents wood chips from flying, aiming to solve the above-mentioned problem.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an electric circular saw that prevents wood chips from splashing, including an electric circular saw, a shell, a connecting plate, a collection bin, a mounting plate, a limiting frame, a first return spring, a mounting frame, a filter screen, and an unlocking component. The electric circular saw is equipped with a shell, and the chip outlet at the front end of the shell is connected to a connecting plate. The rear end of the collection bin is slidably connected to the connecting plate. The bottom of the collection bin is connected to the mounting plate at both the front and rear ends. The mounting plate is slidably connected to the limiting frame. A first return spring is sleeved on the limiting frame. One end of the first return spring is connected to the mounting plate, and the other end is connected to the limiting frame. The bottom of the collection bin is slidably connected to the mounting frame. The bottom of the limiting frame is provided with an inclined surface. The limiting frame and the mounting frame are in a limiting fit. A filter screen is placed inside the mounting frame. An unlocking component for releasing the limiting frame from restricting the mounting frame is provided at the bottom right side of the collection bin.

[0007] A further preferred embodiment of this utility model is as follows: the unlocking component includes a first fixed seat, a connecting rod, a second fixed seat, a pressing rod, and a second return spring. The second fixed seat is connected to the right side of the collection chamber. The pressing rod is vertically slidably connected to the second fixed seat. The second return spring is sleeved on the pressing rod. One end of the second return spring is connected to the pressing rod, and the other end is connected to the second fixed seat. Inclined surfaces are provided on both sides of the bottom of the pressing rod. Several first fixed seats are connected to the bottom right side of the collection chamber. One end of the connecting rod is connected to the end of the limiting frame, and the middle part is horizontally slidably connected to the first fixed seat. The other end is pressed and engaged with the inclined surface at the bottom of the pressing rod.

[0008] A further preferred embodiment of this utility model is as follows: it also includes a wedge frame and a third return spring. The wedge frame is slidably connected to both ends of the connecting plate. The wedge frame is pressed and engaged with the collection chamber. The third return spring is provided on the wedge frame. One end of the third return spring is connected to the wedge frame, and the other end is connected to the outside of the connecting plate.

[0009] A further preferred embodiment of this utility model is: it also includes a limiting plate, which is connected to the bottom of the collection chamber, and the limiting plate cooperates with the mounting frame for limiting.

[0010] A further preferred embodiment of this utility model is: it also includes an auxiliary plate, and the top of the extrusion rod is connected to the auxiliary plate.

[0011] A further preferred embodiment of this utility model is: it also includes a roller, and the end of the connecting rod and the pressing rod that is pressed together is rotatably connected to the roller.

[0012] A further preferred embodiment of this utility model is: it also includes an observation window, and an observation window made of transparent material is provided on the rear side of the collection chamber.

[0013] A further preferred embodiment of this utility model is: it also includes a pull rope, and the bottom of the mounting frame is connected to the pull rope.

[0014] Compared with the prior art, the advantages of this utility model are: through the guiding cooperation between the outer shell and the connecting plate, the splashed wood chips are forcibly introduced into the collection chamber. Utilizing the airflow channel structure of the filter screen, air is discharged through the filter screen, while the wood chips are blocked and settled, achieving the purpose of sealed collection of wood chips. Through the visual monitoring function of the transparent observation window, workers can directly judge the amount of wood chips accumulated in the collection chamber. Combined with the half-capacity shutdown rule, wood chips are prevented from clogging the filter screen or overflowing, ensuring continuous and efficient collection. Attached Figure Description

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional view showing the connection relationship between the connecting plate and the collection chamber of this utility model;

[0018] Figure 3 This is a schematic diagram showing the connection relationship between the limiting frame and the first reset spring of this utility model;

[0019] Figure 4 This is an exploded view showing the connection relationship between the mounting bracket and the filter screen of this utility model;

[0020] Figure 5 This is a schematic diagram showing the connection relationship between the first fixed seat and the connecting rod of this utility model;

[0021] Figure 6 This is a schematic diagram of the installation structure of the wedge-shaped frame and the third reset spring of this utility model;

[0022] Figure 7 This is a cross-sectional view showing the connection relationship between the limiting plate and the second reset spring of this utility model.

[0023] In the diagram: 1. Circular saw, 2. Outer casing, 3. Connecting plate, 4. Collection bin, 5. Mounting plate, 6. Limiting frame, 7. First return spring, 8. Mounting frame, 9. Filter screen, 10. First fixed seat, 11. Connecting rod, 12. Second fixed seat, 13. Pressing rod, 14. Second return spring, 15. Wedge frame, 16. Third return spring, 17. Limiting plate, 18. Auxiliary plate, 19. Roller, 20. Observation window, 21. Pull rope. Detailed Implementation

[0024] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0025] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0026] This embodiment mainly describes the structure of the electric circular saw, as follows:

[0027] A circular saw that prevents sawdust from flying everywhere, such as Figures 1-7 As shown, the device includes an electric circular saw 1, a housing 2, a connecting plate 3, a collection bin 4, a mounting plate 5, a limiting frame 6, a first return spring 7, a mounting bracket 8, a filter screen 9, and an unlocking component. The electric circular saw 1 is mounted on the housing 2. The front end of the housing 2 has a chip outlet connected to the connecting plate 3. The rear end of the collection bin 4 is slidably connected to the connecting plate 3. The bottom of the collection bin 4 has mounting plates 5 connected to both the front and rear ends. The mounting plate 5 is slidably connected to the limiting frame 6. The first return spring 7 is sleeved on the limiting frame 6. One end of the first return spring 7 is connected to the mounting plate 5, and the other end is connected to the limiting frame 6. The bottom of the collection bin 4 is slidably connected to the mounting bracket 8. The bottom of the limiting frame 6 has an inclined surface. The limiting frame 6 and the mounting bracket 8 are in a limiting fit. The filter screen 9 is placed inside the mounting bracket 8. An unlocking component for releasing the limiting frame 6 from restricting the mounting bracket 8 is provided on the bottom right side of the collection bin 4.

[0028] like Figure 3 and Figure 5 As shown, the unlocking assembly includes a first fixed base 10, a connecting rod 11, a second fixed base 12, a pressing rod 13, and a second return spring 14. The second fixed base 12 is connected to the right side of the collection chamber 4. The pressing rod 13 is vertically slidably connected to the second fixed base 12. The second return spring 14 is sleeved on the pressing rod 13. One end of the second return spring 14 is connected to the pressing rod 13, and the other end is connected to the second fixed base 12. Both sides of the bottom of the pressing rod 13 are provided with inclined surfaces. Several first fixed bases 10 are connected to the bottom right side of the collection chamber 4. One end of the connecting rod 11 is connected to the end of the limiting frame 6, and the middle part is horizontally slidably connected to the first fixed base 10. The other end is pressed and engaged with the inclined surface at the bottom of the pressing rod 13.

[0029] like Figure 1 and Figure 6As shown, it also includes a wedge frame 15 and a third return spring 16. The wedge frame 15 is slidably connected to both ends of the connecting plate 3. The wedge frame 15 is pressed and engaged with the collection chamber 4. The third return spring 16 is provided on the wedge frame 15. One end of the third return spring 16 is connected to the wedge frame 15, and the other end is connected to the outside of the connecting plate 3.

[0030] like Figure 7 As shown, it also includes a limiting plate 17, which is connected to the bottom of the collection chamber 4, and the limiting plate 17 is in a limiting cooperation with the mounting frame 8.

[0031] like Figure 5 As shown, it also includes an auxiliary plate 18, and the top of the extrusion rod 13 is connected to the auxiliary plate 18.

[0032] It also includes a roller 19, and the roller 19 is rotatably connected to the end of the connecting rod 11 that is pressed by the pressing rod 13.

[0033] like Figure 5 As shown, it also includes an observation window 20, which is made of transparent material and is provided on the rear side of the collection chamber 4.

[0034] like Figure 4 As shown, it also includes a pull rope 21, which is connected to the bottom of the mounting bracket 8.

[0035] When the worker operates the circular saw 1 to cut wood, the sawdust produced by the saw blade is effectively guided by the outer casing 2 of the circular saw 1 itself, flowing directionally towards the connecting plate 3. The sawdust enters the collection chamber 4 through the channel of the connecting plate 3. Inside the collection chamber 4, airflow is discharged through the filter 9 at the bottom, while the sawdust is effectively blocked by the filter 9. The worker can observe the accumulation of sawdust in real time through the transparent observation window 20. When the sawdust accumulates to about half the capacity of the collection chamber 4, the worker stops the cutting operation and turns off the power to the circular saw 1, preparing to clean up the sawdust.

[0036] When sawdust needs to be removed, the worker presses down on the auxiliary plate 18 mounted on top of the pressing rod 13 with their fingers. This action drives the pressing rod 13 to overcome the elastic force of the second return spring 14 and slide vertically downward along the second fixed seat 12. The pressing rod 13 presses against the connecting rod 11, which is in contact with it, through the inclined surfaces on both sides of its bottom. At the contact point, the end of the connecting rod 11 is equipped with the roller 19, which converts sliding friction into rolling friction, reducing resistance. The pressed connecting rod 11 slides laterally along the first fixed seat 10. Since the other end of the connecting rod 11 is connected to the end of the limiting frame 6, the lateral movement of the connecting rod 11 pulls the limiting frame 6 to overcome the tension of the first return spring 7 and slide outward along the mounting plate 5. When the limiting frame 6 slides outward a sufficient distance, the limiting part at its bottom, which was originally engaged with the top of the mounting frame 8, disengages, and the vertical constraint of the limiting frame 6 on the mounting frame 8 is released. At this time, the mounting frame 8 will fall downward a short distance under the action of gravity. During this downward movement, the side wall of the mounting bracket 8 will contact the end of the outwardly sliding limiting bracket 6, forming a temporary block to prevent the limiting bracket 6 from immediately sliding inward and resetting under the action of the first return spring 7. At this time, the worker releases the pressed auxiliary plate 18, and the elastic force of the second return spring 14 will push the pressing rod 13 to slide upward along the second fixed seat 12, returning it to its initial position.

[0037] The worker then pulls the pull rope 21 downwards. The tension in the rope 21 causes the entire mounting frame 8 and the filter screen 9 inside it to continue moving downwards, eventually sliding completely out of the bottom of the collection chamber 4. As the mounting frame 8 slides downwards, it gradually disengages from the limiting frame 6. Once completely disengaged, the limiting frame 6 and its connected connecting rod 11 are no longer constrained by the mounting frame 8. The elastic potential energy stored in the first return spring 7 is released instantaneously, pulling the limiting frame 6 to slide inwards along the mounting plate 5 to reset. Simultaneously, the connecting rod 11 is also pulled, sliding laterally along the first fixed seat 10 to reset. The worker can then handle the collected wood chips that have fallen from the bottom of the collection chamber 4 and clean any remaining small debris from the disassembled filter screen 9 to ensure its breathability.

[0038] After cleaning, the worker realigns the mounting bracket 8 with the bottom opening of the collection chamber 4 and pushes it upwards. As the mounting bracket 8 moves upwards, its top edge contacts the inclined surface at the bottom of the limiting bracket 6. Continuing to push the mounting bracket 8 upwards, the force at its top edge is converted into a lateral force through the inclined surface, pushing the two limiting brackets 6 to overcome the tension of the first return spring 7 and slide again along the mounting plate 5 to both sides. When the mounting bracket 8 is fully pushed into the predetermined position at the bottom of the collection chamber 4, its top contacts the limiting plate 17 fixed to the bottom of the collection chamber 4. The limiting plate 17 prevents the mounting bracket 8 from moving upwards further, and the compressed first return spring 7 releases its elasticity, pulling the limiting bracket 6 to slide inwards along the mounting plate 5 to reset. After resetting, the top plane of the limiting bracket 6 moves exactly below the corresponding plane at the bottom of the mounting bracket 8, forming a reliable limiting fit and firmly locking it at the bottom of the collection chamber 4.

[0039] When it is necessary to completely disassemble the collection chamber 4, the worker simply pulls the collection chamber 4 upwards by hand. The collection chamber 4 slides upwards along the track of the connecting plate 3, which is slidably connected to its rear end. During the upward sliding process, the two sides of the collection chamber 4 will move relative to the inclined surfaces of the wedge-shaped frames 15 installed at the left and right ends of the connecting plate 3, forcing the wedge-shaped frames 15 to overcome the tension of the third return spring 16 and slide outwards along the connecting plate 3, compressing the third return spring 16. When the collection chamber 4 is completely pulled out and disengaged from the wedge-shaped frames 15, the elastic force of the third return spring 16 is released, pushing the wedge-shaped frames 15 to slide inwards along the connecting plate 3, returning to the initial position, thus completing the separation of the collection chamber 4 from the connecting plate 3.

[0040] When the collection chamber 4 needs to be reinstalled, the worker aligns the rear end of the collection chamber 4 with the slot of the connecting plate 3, ensuring it is positioned between the two wedge brackets 15. Then, the worker pushes the collection chamber 4 downwards. During this downward insertion, the sides of the collection chamber 4 will contact the inclined surfaces inside the wedge brackets 15. Continuing to press down on the collection chamber 4, the force on its sidewalls is converted into a lateral force through the inclined surfaces, pushing the two wedge brackets 15 against the tension of the third return spring 16, causing them to slide outwards along the connecting plate 3 again. This compresses the third return spring 16, and the clamping force generated by the spring force securely clamps the collection chamber 4 onto the connecting plate 3, ensuring stable installation during operation and preventing loosening or detachment.

[0041] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. 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.

[0042] The above provides a detailed description of the electric circular saw for preventing wood chip splashing provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from its principle, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A circular saw that prevents sawdust from splashing, characterized in that: The components include an electric circular saw (1), a housing (2), a connecting plate (3), a collection bin (4), a mounting plate (5), a limiting bracket (6), a first reset spring (7), a mounting bracket (8), a filter screen (9), and an unlocking assembly. The electric circular saw (1) is fitted with a housing (2). The front end of the housing (2) is connected to the connecting plate (3). The rear end of the collection bin (4) is slidably connected to the connecting plate (3). The bottom of the collection bin (4) is connected to mounting plates (5) at both the front and rear ends. The mounting plates (5) are slidably connected to the limiting bracket (6). 6) A first reset spring (7) is fitted on the limiting frame (6). One end of the first reset spring (7) is connected to the mounting plate (5), and the other end is connected to the limiting frame (6). The bottom of the collection chamber (4) is slidably connected to the mounting frame (8). The bottom of the limiting frame (6) is provided with an inclined surface. The limiting frame (6) and the mounting frame (8) are in a limiting fit. A filter screen (9) is placed inside the mounting frame (8). The bottom right side of the collection chamber (4) is provided with an unlocking component for releasing the limiting frame (6) from restricting the mounting frame (8).

2. The circular saw for preventing sawdust from splashing according to claim 1, characterized in that: The unlocking assembly includes a first fixed seat (10), a connecting rod (11), a second fixed seat (12), a squeezing rod (13), and a second reset spring (14). The second fixed seat (12) is connected to the right side of the collection chamber (4). The squeezing rod (13) is vertically slidably connected to the second fixed seat (12). The second reset spring (14) is sleeved on the squeezing rod (13). One end of the second reset spring (14) is connected to the squeezing rod (13), and the other end is connected to the second fixed seat (12). The bottom sides of the squeezing rod (13) are provided with inclined surfaces. Several first fixed seats (10) are connected to the bottom right side of the collection chamber (4). One end of the connecting rod (11) is connected to the end of the limit frame (6), and the middle part is horizontally slidably connected to the first fixed seat (10). The other end is squeezed and engaged with the bottom inclined surface of the squeezing rod (13).

3. The electric circular saw for preventing sawdust splashing according to claim 2, characterized in that: It also includes a wedge frame (15) and a third reset spring (16). The wedge frame (15) is slidably connected to both ends of the connecting plate (3). The wedge frame (15) is pressed and engaged with the collection chamber (4). The third reset spring (16) is provided on the wedge frame (15). One end of the third reset spring (16) is connected to the wedge frame (15), and the other end is connected to the outside of the connecting plate (3).

4. The electric circular saw for preventing sawdust splashing according to claim 3, characterized in that: It also includes a limiting plate (17), which is connected to the bottom of the collection chamber (4), and the limiting plate (17) is matched with the mounting frame (8) for limiting.

5. The electric circular saw for preventing sawdust splashing according to claim 4, characterized in that: It also includes an auxiliary plate (18), and the top of the extrusion rod (13) is connected to the auxiliary plate (18).

6. The circular saw for preventing sawdust from splashing according to claim 5, characterized in that: It also includes rollers (19), and the end of the connecting rod (11) and the pressing rod (13) is rotatably connected to the rollers (19).

7. A circular saw for preventing sawdust from splashing according to claim 6, characterized in that: It also includes an observation window (20), and a transparent observation window (20) is provided on the rear side of the collection chamber (4).

8. The electric circular saw for preventing sawdust splashing according to claim 7, characterized in that: It also includes a pull rope (21), and the bottom of the mounting bracket (8) is connected to the pull rope (21).

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