Cutting guide structure for an electric circular saw
By using the interlocking structure of the guide plate and the sliding plate, combined with the limiting and locking components, the stability problem of the electric circular saw cutting guide structure is solved, and precise control of the cutting direction and operational safety are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG TONGDA ELECTRICAL APPLIANCE
- Filing Date
- 2025-08-19
- Publication Date
- 2026-07-21
AI Technical Summary
The existing electric circular saw cutting guide structure has poor stability, and the guide component is prone to deflection, affecting the accuracy of the cutting path.
The system employs a guide base plate and a sliding plate structure. The guide base plate is equipped with guide strips that fit into the guide grooves on the sliding plate. Combined with components such as limit grooves, limit blocks, limit knobs, locking knobs, and directional cams, it achieves stable guidance and directional control of the sliding plate.
It improves the stability and safety of circular saw cutting, ensures the accuracy of the cutting direction, prevents the sliding plate from easily detaching and moving in the opposite direction, and enhances the controllability of operation.
Smart Images
Figure CN224526115U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric circular saw technology, and in particular to a cutting guide structure for an electric circular saw. Background Technology
[0002] A circular saw is a power tool used for cutting sheet metal. Circular saws typically travel in a straight line during cutting; however, auxiliary devices are usually used to ensure the cutting path remains consistent, as shown in patent application publication number CN118789034A. However, existing auxiliary guide structures have poor stability, and the guide components are prone to deflection, affecting the final cutting path. Therefore, a stable guiding structure for circular saw cutting is needed. Summary of the Invention
[0003] The purpose of this invention is to address the shortcomings of existing technologies and provide a cutting guide structure for an electric circular saw.
[0004] To solve the above problems, the present invention adopts the following solution: A cutting guide structure for an electric circular saw includes an electric circular saw body, a guide base plate, and a sliding plate. The electric circular saw body is fixedly disposed above the sliding plate, and a portion of the saw blade in the electric circular saw body is located below the sliding plate. The sliding plate is fitted onto the guide base plate, and the guide base plate is provided with an upwardly protruding guide strip, the extension direction of which is parallel to the edge of the guide base plate near the saw blade. The lower surface of the sliding plate is provided with a guide groove corresponding to the guide strip on the guide base plate, and the guide strip is embedded in the guide groove.
[0005] Furthermore, a limiting groove is provided on the side of the guide base plate near the sliding plate; the limiting groove is located above the guide base plate, and the opening direction of the limiting groove faces the sliding plate; the length direction of the limiting groove is parallel to the length direction of the guide bar; a limiting block that cooperates with the limiting groove is also provided on the edge of the sliding plate near the limiting groove.
[0006] Furthermore, the limiting block is disposed on the limiting knob, which is rotatably disposed above the sliding plate; the bottom of the sliding plate is provided with a fan-shaped hollow groove corresponding to the limiting block, and the side of the hollow groove penetrates the side of the sliding plate near the limiting groove; the limiting knob passes through the sliding plate and is fixedly connected to the limiting block at the bottom; the limiting block moves within the hollow groove as the limiting knob rotates; the end of the limiting block away from the limiting knob rotates out of the hollow groove area from the side of the sliding plate and enters the limiting groove, or rotates into the hollow groove area and leaves the limiting groove.
[0007] Furthermore, a ball is provided between the limiting knob and the sliding plate; the ball is located in the cylindrical through hole at the bottom of the limiting knob, and a first spring is provided between the ball and the limiting knob; at least one spherical concave hole corresponding to the ball is provided on the sliding plate.
[0008] Furthermore, the limiting knob is also provided with an indicator arrow for indicating the orientation of the limiting block; the indicator arrow is at a set angle to the orientation of the end of the limiting block that is away from the limiting knob.
[0009] Furthermore, a first locking knob is provided on the sliding plate. The first locking knob is threadedly engaged with a threaded hole on the sliding plate. The threaded hole penetrates the sliding plate from top to bottom and communicates with the bottom of the guide groove. The first locking knob is directly opposite the guide strip on the guide base plate.
[0010] Furthermore, a second spring is provided between the first locking knob and the sliding plate.
[0011] Furthermore, a second locking knob is also provided on the sliding plate. The second locking knob is located in a locking recess above the sliding plate. The locking recess is located on the side of the guide groove below the sliding plate, and the side of the bottom of the locking recess is connected to the side of the guide groove. The second locking knob is threadedly engaged with the sliding plate. A locking protrusion is also provided between the second locking knob and the bottom of the locking recess. The locking protrusion is elliptical or cam-shaped, and a part of the locking protrusion protrudes from the locking recess and is exposed in the guide groove.
[0012] Furthermore, the bottom of the sliding plate is provided with a directional groove, and a directional knob is rotatably mounted on the sliding plate. The directional knob passes through the sliding plate and is fixedly connected to a directional cam in the directional groove below the sliding plate. The side of the directional groove is connected to the side of the guide groove. The protruding part of the directional cam enters or leaves the guide groove area when rotating. The opening of the directional groove connecting to the guide groove is narrower on one side and wider on the other side, so that the directional cam can only rotate into or out of the directional groove from the wider side. A torsion spring that cooperates with the cam is also provided in the directional groove, and the torsion spring drives the protruding part of the directional cam to rotate out of the directional groove.
[0013] Furthermore, the outer arc surface of the protruding portion of the directional cam is also provided with a tooth structure to enhance the friction with the guide bar.
[0014] The beneficial effects of this utility model are as follows: By directly setting a guide base plate with guide strips, and cooperating with the guide groove on the sliding plate fixed to the electric circular saw body, the two fit together to guide the sliding direction of the sliding plate, thereby stabilizing and controlling the cutting direction of the electric circular saw. By setting a limiting groove on the guide base plate and a limiting block on the sliding plate, the position restriction effect is achieved, preventing the sliding plate from easily detaching from the guide base plate and improving operational safety. By setting a limit knob and a limit block to be fixedly connected, the rotation control of the limit block can be realized, which makes it convenient to control the limit block to rotate into the limit groove for limit engagement, or to rotate out of the limit groove to release the position limit; By setting a first locking knob in conjunction with a second locking knob, the position of the sliding plate can be locked, thereby preventing the sliding plate from moving easily after being locked. By setting a directional groove on the sliding plate in conjunction with a directional cam and a directional knob, the directional movement control of the sliding plate relative to the guide bar is achieved, so that it will be stuck due to the friction between the directional cam and the guide bar when it moves in the opposite direction; By incorporating a toothed structure on the directional cam, the stability of the directional cam when it engages with the guide bar is improved. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of Example 1; Figure 2 for Figure 1 A magnified view of a portion of region a; Figure 3 This is a schematic diagram of the sliding plate in Example 1; Figure 4 This is a split view of the knob on the sliding plate in Example 1; Figure 5 This is a schematic diagram of the bottom of the sliding plate in Example 1; Figure 6 This is an exploded view of the bottom of the sliding plate in Example 1; Figure 7 This is a schematic diagram of the locking bump in Embodiment 1; Figure 8 This is a schematic diagram of the directional cam in Example 1; Explanation of the reference numerals in the attached diagram: 1. Electric circular saw body; 2. Guide base plate; 21. Guide strip; 22. Limiting groove; 3. Sliding plate; 31. Guide groove; 32. Limiting block; 33. Limiting knob; 34. Hollowed-out groove; 35. Ball bearing; 36. First spring; 37. Spherical concave hole; 38. Indicating arrow; 39. First locking knob; 310. Second spring; 311. Second locking knob; 312. Locking concave hole; 313. Orientation groove; 314. Orientation knob; 315. Orientation cam; 316. Tooth structure; 317. Locking protrusion; 318. Torsion spring. Detailed Implementation
[0016] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.
[0017] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the figures only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex. Example
[0018] like Figures 1-8 As shown, a cutting guide structure for an electric circular saw includes an electric circular saw body 1, a guide base plate 2, and a sliding plate 3. The electric circular saw body 1 is fixedly mounted above the sliding plate 3. The saw blade in the electric circular saw body 1 is close to the edge of the guide base plate 2, and a portion of the electric circular saw body 1 is located below the sliding plate 3. The sliding plate 3 is fitted onto the guide base plate 2. The guide base plate 2 is provided with an upwardly protruding guide strip 21, the extension direction of which is parallel to the edge of the guide base plate 2 near the saw blade. The lower surface of the sliding plate 3 is provided with a guide groove 31 corresponding to the guide strip 21 on the guide base plate 2, and the guide strip 21 is embedded in the guide groove 31. The traveling direction of the electric circular saw is determined by the cooperation of the guide groove 31 and the guide strip 21. On the other hand, the guide base plate 2 can also be connected to the object to be cut by means of screws, glue, or clamps.
[0019] A limiting groove 22 is also provided on the side of the guide base plate 2 near the sliding plate 3; the limiting groove 22 is located above the guide base plate 2, and the opening direction of the limiting groove 22 faces the sliding plate 3; the length direction of the limiting groove 22 is parallel to the length direction of the guide bar 21; a limiting block 32 that cooperates with the limiting groove 22 is also provided on the side of the edge of the sliding plate 3 near the limiting groove 22. When the limiting block 32 is embedded in the limiting groove 22, the vertical movement of the limiting block 32 is restricted. With the help of the guide bar 21 and the guide groove 31, the sliding plate 3 can only slide along the length direction of the guide bar 21, and it is difficult to lift it up vertically to separate the guide groove 31 and the guide bar 21; it should be noted that the height of the limiting groove 22 is lower than the edge height of the sliding plate 3, so that the edge of the sliding plate 3 can abut against the opening of the limiting groove 22. A limiting block 32 is disposed on a limiting knob 33, which is rotatably disposed above a sliding plate 3. A fan-shaped hollow groove 34 corresponding to the limiting block 32 is disposed at the bottom of the sliding plate 3, and the side of the hollow groove 34 penetrates the side of the sliding plate 3 near the limiting groove 22. The limiting knob 33 passes through the sliding plate 3 and is fixedly connected to the limiting block 32 at the bottom. The limiting block 32 moves within the hollow groove 34 as the limiting knob 33 rotates. The end of the limiting block 32 away from the limiting knob 33 rotates out of the hollow groove 34 area from the side of the sliding plate 3 and into the limiting groove 22, or rotates into the hollow groove 34 area and leaves the limiting groove 22. A ball bearing 35 is also provided between the limiting knob 33 and the sliding plate 3; the ball bearing 35 is located in the cylindrical through hole at the bottom of the limiting knob 33, and a first spring 36 is also provided between the ball bearing 35 and the limiting knob 33; the sliding plate 3 is provided with at least one spherical concave hole 37 corresponding to the ball bearing 35. In this example, the sliding plate 3 is provided with two spherical concave holes 37, which correspond to the positions where the limiting block 32 rotates out of the limiting groove 22 at its maximum volume and the positions where the limiting block 32 is completely rotated into the limiting groove 22, respectively. The position where the limiting block 32 rotates out of the limiting groove 22 corresponds to the angle when the length direction of the limiting block 32 is perpendicular to the length direction of the guide groove 31. The limiting knob 33 is also provided with an indicator arrow 38 for indicating the orientation of the limiting block 32; the indicator arrow 38 and the end of the limiting block 32 away from the limiting knob 33 are at a set angle. In this example, the two are spaced 180° apart.
[0020] The sliding plate 3 is also provided with a first locking knob 39, which is threaded into a threaded hole on the sliding plate 3. The threaded hole penetrates the sliding plate 3 from top to bottom and communicates with the bottom of the guide groove 31. The first locking knob 39 is directly opposite the guide strip 21 on the guide base plate 2. When the first locking knob 39 is rotated downwards until its bottom abuts against the top of the guide strip 21, the limiting block 32 and the limiting groove 22 work together to press the first knob and the guide strip 21 together, thus locking them. A second spring 310 is also provided between the first locking knob 39 and the sliding plate 3 to provide a stable upward elastic force for the first locking knob 39, preventing the first locking knob 39 from rotating downwards due to vibration or other reasons, which would lock the sliding plate 3 and the guide base plate 2, or affect the relative sliding between them.
[0021] The sliding plate 3 is also provided with a second locking knob 311, which is located in a locking recess 312 above the sliding plate 3. The locking recess 312 is located on the side of the guide groove 31 below the sliding plate 3, and the bottom side of the locking recess 312 is connected to the side of the guide groove 31. The second locking knob 311 and the sliding plate 3 are threaded together to achieve up and down movement, squeezing the side of the guide strip 21 or separating from the side of the guide strip 21. In this example, a locking protrusion 317 is also provided between the second locking knob 311 and the bottom of the locking recess 312. The locking protrusion 317 is elliptical or cam-shaped, and a part of the locking protrusion 317 protrudes from the locking recess 312 and is exposed in the guide groove 31. As the locking protrusion 317 is rotated, different squeezing effects are achieved on the guide strip 21, thereby achieving locking or tensioning. In order to facilitate rotation, a fixed protrusion is also provided on the locking protrusion 317. In this example, the second locking knob 311 is located in the guide groove 31 on one side near the limiting groove 22 on the guide base plate 2. After the second locking knob 311 presses the locking protrusion 317, the locking protrusion 317 squeezes the guide strip 21, pushing the sliding plate 3 towards the limiting groove 22, so that the limiting block 32 is fully squeezed into the limiting groove 22 and is not easy to come out. In addition, with the effect of the limiting groove 22 abutting against the edge of the sliding plate 3, the sliding plate 3 is subjected to force on both sides of the part between the limiting groove 22 and the guide strip 21, ensuring stability.
[0022] In this example, two first locking knobs 39 and two second locking knobs 311 are respectively provided at both ends of the sliding plate 3 to achieve a relatively stable locking effect and prevent it from moving easily relative to the guide plate.
[0023] The bottom of the sliding plate 3 is provided with a directional groove 313, and a directional knob 314 is rotatably mounted on the sliding plate 3. The directional knob 314 passes through the sliding plate 3 and is fixedly connected to the directional cam 315 in the directional groove 313 below the sliding plate 3. The side of the directional groove 313 is connected to the side of the guide groove 31. The protruding part of the directional cam 315 enters or leaves the area of the guide groove 31 when rotating. The opening of the directional groove 313 that connects to the guide groove 31 is narrower on one side and wider on the other side, so that the directional cam 315 can only rotate in or out from the wider side. The outer arc surface of the protruding part of the directional cam 315 is also provided with a tooth structure 316 to enhance the friction with the guide bar 21, so that it can only transmit in one direction, thereby controlling the sliding plate 3 to slide in one direction, that is, it can only move in the forward direction; a torsion spring 318 is also provided in the directional groove 313 to cooperate with the directional cam 315. The torsion spring 318 drives the protruding part of the directional cam 315 to rotate out of the directional groove 313, so that when the directional cam 315 is not under force, its protruding part is located outside the directional groove 313, that is, pointing into the guide groove 31. When the slide plate 3 moves forward, the directional cam 315 rotates into the directional groove 313 from the wider side of the opening, thus preventing it from jamming the guide bar 21 and affecting the movement of the slide plate 3. Conversely, when the slide plate 3 moves in the opposite direction, the toothed structure 316 on the directional cam 315 jams the side of the guide bar 21. Moreover, since the directional cam 315 is difficult to retract from the narrower side of the opening into the directional groove 313, the directional cam 315 can stably jam the guide bar 21, achieving the function of stopping in the reverse direction.
[0024] In practice, by directly setting a guide base plate 2 with guide strips 21, and cooperating with the guide groove 31 on the sliding plate 3 fixed to the electric circular saw body 1, the two fit together to guide the sliding direction of the sliding plate 3, thereby stabilizing the cutting direction of the electric circular saw. By setting a limit groove 22 on the guide base plate 2 and cooperating with the limit block 32 on the sliding plate 3, the position is limited, preventing the sliding plate 3 from easily detaching from the guide base plate 2 and improving operational safety. By setting a limit knob 33 and fixing it to the limit block 32, the rotation control of the limit block 32 is realized, making it easy to control the limit block 32 to rotate into the limit groove. The position is limited within the 22, or rotated out of the limiting groove 22 to release the position limit; by setting the first locking knob 39 in conjunction with the second locking knob 311, the position of the sliding plate 3 is locked, thereby preventing the sliding plate 3 from moving easily after locking; by setting the directional groove 313 on the sliding plate 3 in conjunction with the directional cam 315 and the directional knob 314, the directional movement control of the sliding plate 3 relative to the guide bar 21 is realized, so that when it moves in the opposite direction, it will be stuck due to the friction between the directional cam 315 and the guide bar 21; by setting the tooth structure 316 on the directional cam 315, the stability when the directional cam 315 is stuck with the guide bar 21 is improved.
[0025] The above description is merely a specific example of this utility model and does not constitute any limitation on this utility model. Obviously, those skilled in the art, after understanding the content and principle of this utility model, may make various modifications and changes in form and details without departing from the principle and structure of this utility model. However, these modifications and changes based on the concept of this utility model are still within the protection scope of the claims of this utility model.
Claims
1. A cutting guide structure for an electric circular saw, comprising an electric circular saw body (1), characterized in that, It also includes a guide base plate (2) and a sliding plate (3); wherein the electric circular saw body (1) is fixedly set above the sliding plate (3), and part of the saw blade in the electric circular saw body (1) is located below the sliding plate (3); the sliding plate (3) is fitted above the guide base plate (2), and the guide base plate (2) is provided with an upwardly protruding guide strip (21), the extension direction of the guide strip (21) is parallel to the edge of the guide base plate (2) near the saw blade; the lower surface of the sliding plate (3) is provided with a guide groove (31) corresponding to the guide strip (21) on the guide base plate (2), and the guide strip (21) is embedded in the guide groove (31).
2. The cutting guide structure of an electric circular saw according to claim 1, characterized in that, A limiting groove (22) is also provided on the side of the guide base plate (2) near the sliding plate (3); the limiting groove (22) is located above the guide base plate (2), and the opening direction of the limiting groove (22) faces the sliding plate (3); the length direction of the limiting groove (22) is parallel to the length direction of the guide strip (21); a limiting block (32) that cooperates with the limiting groove (22) is also provided on the side of the edge of the sliding plate (3) near the limiting groove (22).
3. The cutting guide structure for an electric circular saw according to claim 2, characterized in that, The limiting block (32) is set on the limiting knob (33), and the limiting knob (33) is rotatably set above the sliding plate (3); the bottom of the sliding plate (3) is provided with a fan-shaped hollow groove (34) corresponding to the limiting block (32), and the side of the hollow groove (34) penetrates the side of the sliding plate (3) near the limiting groove (22); the limiting knob (33) passes through the sliding plate (3) and is fixedly connected to the limiting block (32) at the bottom; the limiting block (32) moves in the hollow groove (34) as the limiting knob (33) rotates; the end of the limiting block (32) away from the limiting knob (33) rotates out of the hollow groove (34) area from the side of the sliding plate (3) and enters the limiting groove (22), or rotates into the hollow groove (34) area and leaves the limiting groove (22).
4. The cutting guide structure for an electric circular saw according to claim 3, characterized in that, A ball (35) is also provided between the limiting knob (33) and the sliding plate (3); the ball (35) is located in the cylindrical through hole at the bottom of the limiting knob (33), and a first spring (36) is also provided between the ball (35) and the limiting knob (33); at least one spherical concave hole (37) corresponding to the ball (35) is provided on the sliding plate (3).
5. The cutting guide structure of an electric circular saw according to claim 3, characterized in that, The limiting knob (33) is also provided with an indicator arrow (38) for indicating the orientation of the limiting block (32); the indicator arrow (38) is at a set angle to the orientation of the end of the limiting block (32) away from the limiting knob (33).
6. The cutting guide structure of an electric circular saw according to claim 2, characterized in that, The sliding plate (3) is provided with a first locking knob (39), which is threadedly engaged with the threaded hole on the sliding plate (3). The threaded hole penetrates the sliding plate (3) from top to bottom and communicates with the bottom of the guide groove (31). The first locking knob (39) is directly opposite the guide strip (21) on the guide base plate (2).
7. The cutting guide structure of an electric circular saw according to claim 6, characterized in that, A second spring (310) is also provided between the first locking knob (39) and the sliding plate (3).
8. The cutting guide structure for an electric circular saw according to claim 6, characterized in that, The sliding plate (3) is also provided with a second locking knob (311). The second locking knob (311) is located in the locking recess (312) above the sliding plate (3). The locking recess (312) is located on the side of the guide groove (31) below the sliding plate (3). The side of the bottom of the locking recess (312) is connected to the side of the guide groove (31). The second locking knob (311) and the sliding plate (3) are connected by a thread. A locking protrusion (317) is also provided between the second locking knob (311) and the bottom of the locking recess (312). The locking protrusion (317) is elliptical or cam-shaped. A part of the locking protrusion (317) protrudes from the locking recess (312) and is exposed in the guide groove (31).
9. The cutting guide structure of an electric circular saw according to claim 1, characterized in that, The bottom of the sliding plate (3) is provided with a directional groove (313), and a directional knob (314) is rotatably provided on the sliding plate (3). The directional knob (314) passes through the sliding plate (3) and is fixedly connected to the directional cam (315) in the directional groove (313) below the sliding plate (3). The side of the directional groove (313) is connected to the side of the guide groove (31). The protruding part of the directional cam (315) enters or leaves the guide groove (31) area when rotating. The opening of the directional groove (313) connected to the guide groove (31) is narrower on one side and wider on the other side, so that the directional cam (315) can only rotate into or out of the directional groove (313) from the wider side. A torsion spring that cooperates with the directional cam (315) is also provided in the directional groove (313). The torsion spring drives the protruding part of the directional cam (315) to rotate out of the directional groove (313).
10. The cutting guide structure of an electric circular saw according to claim 9, characterized in that, The outer arc surface of the protruding portion of the directional cam (315) is also provided with a tooth structure (316) for enhancing the friction with the guide bar (21).