Handheld circular saw with depth adjusting device
By using the design of arc-shaped guide rails and lock connections in the depth adjustment device of the handheld circular saw, the problems of complex operation and inreliability in the prior art are solved, and simple and safe cutting depth adjustment is achieved.
Patent Information
- Application Number
- CN202411274862.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-09-15
- Filing Date
- 2024-09-12
- Publication Date
- 2025-03-18
AI Technical Summary
Existing handheld circular saws are complex and not reliable in adjusting cutting depth, making it difficult to achieve simple and safe depth adjustments.
The arc-shaped guide rail with arc-shaped hollows and the operating element are adopted, and the lock connection of the first lock profile and the second lock profile are combined to achieve simple and reliable operation of the depth adjustment device.
Through this design, the user can easily and without complex adjustment of the cutting depth of the circular saw blade, improving the safety and reliability of the operation.
Smart Images
Figure CN119634828A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a handheld circular saw, which comprises: a housing in which a drive motor for rotating and driving a circular saw blade is arranged; and a depth adjustment device for adjusting the cutting depth of the circular saw blade in a workpiece to be processed, wherein the depth adjustment device has an arc-shaped guide rail with an arc-shaped recess and an operating element for adjusting the cutting depth. Background Art
[0002] Such a hand-held circular saw is known in the prior art. Such a hand-held circular saw has a housing in which a drive motor for rotating a circular saw blade is mounted. In addition, the hand-held circular saw has a depth adjustment device for adjusting the cutting depth of the circular saw blade in the workpiece to be processed. The depth adjustment device has an arc-shaped guide rail with an arc-shaped recess and an operating element for adjusting the cutting depth. Summary of the invention
[0003] The present invention relates to a hand-held circular saw, which comprises: a housing in which a drive motor for rotating a circular saw blade is arranged; and a depth adjustment device for adjusting the cutting depth of the circular saw blade in a workpiece to be processed, wherein the depth adjustment device comprises an arc-shaped guide rail with an arc-shaped recess and an operating element for adjusting the cutting depth. A locking element having a first locking contour is assigned to the operating element, and the guide rail has a second locking contour, wherein the first locking contour for adjusting the cutting depth can be connected to the second locking contour via a locking connection.
[0004] The invention thus makes it possible to provide a hand-held circular saw in which a simple and reliable operation of the depth adjustment device is achieved by means of the first and second latching contours.
[0005] Preferably, the operating element is arranged on the arc-shaped guide rail in a pivotable manner.
[0006] The operation of the operating element is thus easily and uncomplicated.
[0007] Preferably, the hand-held circular saw has a protective cover arranged on the circular saw blade, which protective cover can be pivoted together with the circular saw blade when adjusting the cutting depth, wherein the protective cover is connected to the curved guide rail via a pin guided in the curved guide rail.
[0008] This makes it possible to arrange the protective cover safely and securely on the curved guide rail.
[0009] The latching element is preferably assigned a spring element which urges the latching element toward the arc-shaped guide rail.
[0010] Therefore, loading the locking element toward the arc-shaped guide rail can be easily achieved.
[0011] Preferably, the operating element has a receptacle for receiving the latching element in sections.
[0012] This makes it possible to arrange the latching element on the operating element in a simple and stable manner.
[0013] Preferably, the receiving portion has a recess for positioning the locking element.
[0014] Thus, a safe and secure reception of the latching element can be achieved.
[0015] Preferably, the latching element has a contact surface which can be arranged in the receptacle, wherein the contact surface is curved in a transverse direction of the latching element.
[0016] Thus, when the operating element is operated, changes in the angle between the operating element and the curved guide can be compensated for easily and uncomplicatedly.
[0017] According to one embodiment, the first latching contour and the second latching contour are designed at least in sections to be asymmetrical or symmetrical.
[0018] A suitable latching contour can thus be provided in a simple manner.
[0019] Preferably, the latching element has at least one guide element for guidance in a guide rail.
[0020] Thus, a safe and secure guidance of the latching element can be achieved.
[0021] According to one embodiment, a safety element is assigned to the operating element, which prevents unintentional actuation of the operating element, wherein the operating element is actuable in a first actuation direction and the safety element is actuable in a second actuation direction, wherein the first and second actuation directions are different.
[0022] Inadvertent actuation of the operating element can thus be prevented easily and uncomplicatedly. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The present invention will be described in more detail below with reference to the embodiments shown in the accompanying drawings.
[0024] Figure 1 Schematic view of a handheld circular saw with handle and depth adjustment,
[0025] Figure 2 Figure 1 A perspective view of the handle and depth adjustment device of a handheld circular saw.
[0026] Figure 3 along Figure 2 Look in the direction of arrow 298, Figure 1 and Figure 2The profile of the depth adjustment device,
[0027] Figure 4 along Figure 2 Look in the direction of arrow 298, Figures 1 to 3 A top view of the depth adjustment device,
[0028] Figure 5 Belong to Figures 1 to 4 A perspective view of the operating elements of the depth adjustment device,
[0029] Figure 6 Belong to Figures 1 to 4 A perspective view of a locking element of a depth adjustment device,
[0030] Figure 7 Figure 6 A side view of the locking element,
[0031] Figure 8 Belong to Figures 1 to 4 An enlarged section of the arc guide rail of the depth adjustment device.
[0032] Fig. 9 along Figure 2 Look in the direction of arrow 297, Figures 1 to 4 A cross-sectional view of the depth adjustment device in a first position,
[0033] Fig.10 along Figure 2 Look in the direction of arrow 298, Figures 1 to 4 and Fig. 9 A cross-sectional view of the depth adjustment device in a second position,
[0034] Fig.11 along Figure 2 Look in the direction of arrow 297, Figures 1 to 4 and Fig.10 a cross-sectional view of the depth adjustment device in a second position, and
[0035] Fig.12 Figures 1 to 4 and Figures 9 to 11 Perspective view of a depth adjustment device with a safety element. DETAILED DESCRIPTION
[0036] In the figures, elements having the same or similar functions are marked with the same reference symbols and are described in detail only once.
[0037] Figure 1An exemplary hand-held circular saw 100 is shown, which has a housing 110, in which a drive motor 120 is arranged for rotating a circular saw blade 140. Preferably, a handle 115 is assigned to the housing 110. According to one embodiment, the hand-held circular saw 100 has a battery pack 190 for power supply independent of the mains. Alternatively, the hand-held circular saw 100 can have a mains cable for power supply dependent on the mains.
[0038] Furthermore, the hand-held circular saw 100 preferably has a base plate 130. During the machining process, the base plate 130 is preferably placed on a workpiece to be machined.
[0039] Furthermore, the hand-held circular saw 100 has a depth adjustment device 150 for adjusting the cutting depth of the circular saw blade 140 in the workpiece to be processed. The depth adjustment device 150 is preferably arranged in the region of the handle 115 of the hand-held circular saw 100. Preferably, the depth adjustment device 150 is arranged along the rotation axis of the circular saw blade 140 between the circular saw blade 140 and the handle 115. Here, the depth adjustment device 150 is preferably also arranged along the rotation axis of the circular saw blade 140 between the circular saw blade 140 and the drive motor 120.
[0040] Figure 2 Shows the Figure 1 The handle 115 of the handheld circular saw 100 is described Figure 1 The depth adjustment device 150 is shown Figure 1 The right hand 210 of the user of the circular saw 100 is arranged on the handle 115. Preferably, the depth adjustment device 150 is arranged on the handheld circular saw 100 so that the user's thumb 212, especially the thumb 212 of the user's right hand 210, can operate the depth adjustment device 150.
[0041] For this purpose, the depth adjustment device 150 preferably has an operating element 220 with an operating section 222. The operating element 220 is preferably arranged pivotably on the hand-held circular saw 100. To adjust the depth adjustment device 150, the operating element 220 or the operating section 222 is applied in the direction of the arrow 201 toward the handle 115 and can be adjusted. Figure 1 The desired cutting depth of the circular saw blade 140 is determined.
[0042] Preferably, the depth adjustment device 150 has an arc-shaped guide rail 240 with an arc-shaped recess 243. As shown, the operating element 220 is arranged on the arc-shaped guide rail 240 in a swiveling manner. For example, Figure 2 The operating element 220 in the embodiment can rotate around the rotation axis 260. Alternatively, the operating element 220 can also rotate around a fixed joint (instead of the rotation axis 260).
[0043] Preferably, Figure 1A protective cover 230 is arranged on the circular saw blade 140. The protective cover 230 is at least partially Figure 1 The protective cover 230 surrounds the circular saw blade 140 in the area above the base plate 130. Preferably, when adjusting the cutting depth, the protective cover 230 can be adjusted accordingly. Figure 1 The circular saw blade 140 swings. Preferably, the protective cover 230 is connected to the arc-shaped guide rail 240 through a pin 242 guided in the arc-shaped guide rail 240.
[0044] The guide rail 240 is preferably connected to the Figure 1 The guide rail 240 is preferably fastened to the holding device 270 by means of a screw connection. According to one embodiment, the holding device 270 is configured as a spherical bearing.
[0045] According to the invention, a latching element 250 having a first latching contour 252 is assigned to the operating element 220 of the depth adjustment device 150. In addition, the guide rail 240 has a second latching contour 244. Preferably, the first latching contour 252 and the second latching contour 244 are at least partially asymmetrically or symmetrically configured. The first latching contour 252 can be connected to the second latching contour 244, preferably via a latching connection 290, for adjusting the cutting depth. The latching element 250 is preferably connected to the pin 242.
[0046] By operating the operating element 220, the latching connection 290 is released, and the desired cutting depth can be adjusted by moving the depth adjustment device 150 along the arc-shaped recess 243 of the guide rail 240 or along the arrow 202. Once the desired cutting depth has been adjusted, the user can release the operating element 220, thereby generating the latching connection 290 again, thereby fixing the cutting depth.
[0047] also, Figure 2 An arrow 297 is shown to indicate Fig. 9 and Fig.11 In addition, the corresponding viewing direction is shown Figure 3 , Figure 4 and Fig.10 The arrow 298 in FIG. 2 is used to indicate the corresponding viewing direction.
[0048] Figure 3 Shows from Figure 2 Look in the direction of arrow 298 Figure 1 and Figure 2 Depth adjustment device 150. Figure 3 The operating element 220 is shown, which is equipped with a hook-shaped section 322 for being arranged on the rotation axis 260. Alternatively, the section 322 can also be cylindrical. Preferably, the rotation axis 260 is arranged on the holding section 312 of the protective cover 230.
[0049] In addition, the protective cap 230 is shown to have a further holding section 314 with an inner receiving part 310. Preferably, the pin 242 is arranged in sections in the inner receiving part 310. The pin 242 is preferably screwed to the inner receiving part 310. According to one embodiment, the pin 242 is configured as a screw. Here, the screw head 342 of the pin 242 configured as a screw is arranged on the side of the guide rail 240 facing away from the operating element 220, and the threaded section 344 is arranged in the inner receiving part 310. Preferably, the protective cap 230 is installed between the handle 115 and the guide rail 240 along the rotation axis 345 of the pin 242.
[0050] also, Figure 3 The latching connection 290 between the latching element 250 and the guide rail 240 is shown. Here, the pin 242 positions the latching element along the rotation axis 345 between the holding section 314 of the protective cover 230 and the guide rail 240. In addition, the operating element 220 has a receptacle 324 for receiving the latching element 250. Preferably, a spring element 340 is assigned to the latching element 250, which urges the latching element 250 toward the guide rail 240. Preferably, the spring element 340 is arranged on the outer circumference of the holding section 314 of the protective cover 230. Preferably, the spring element 340 is designed as a helical spring.
[0051] Figure 4 along Figure 2 The direction of arrow 298 shows Figures 1 to 3 Depth adjustment device 150. Figure 4 The hook section 322 of the operating element 220 is shown, wherein the rotation axis 260 is preferably formed by a screw 460 . The screw head associated with the screw 460 prevents a displacement of the hook section 322 .
[0052] Figure 5 Shows the Figures 1 to 4 The operating element 220 of the depth adjustment device 150 has an operating section 222 and a hook section 322. A U-shaped section 510 is arranged between the operating section 222 and the hook section 322 along the longitudinal direction 501 of the operating element 220. The U-shaped section 510 forms a receiving portion 512. As shown, the receiving portion 512 is open downward. The receiving portion 512 is configured to receive the locking element 250 in sections.
[0053] Furthermore, the operating element 220, in particular the U-shaped section 510, has a recess 514 in the transverse direction 502. The recess 514 is used to position the latching element 250. As shown, the recess 514 is elliptical. Alternatively, the recess can also have any other shape and thus also be, for example, circular or angular.
[0054] Figure 6 Shows the Figures 1 to 4 The locking element 250 of the depth adjustment device 150 in the embodiment of the present invention is shown. The locking element 250 has a cylindrical base body 605 and a central recess 640. Preferably, the cylindrical base body 605 is equipped with a support surface 610. The support surface 610 is arranged on the side 602 of the cylindrical base body 605 facing the first locking contour 252. In particular, the support surface 610 is arranged outside the first locking contour 252 in the radial direction 608. The support surface 610 is preferably arranged on the side 602 of the cylindrical base body 605 facing the first locking contour 252. Figure 5 The receiving portion 512 of the latching element 250 is disposed in the receiving portion 512 , wherein the receiving surface 610 is curved along the transverse direction 609 of the latching element 250 .
[0055] The first locking contour 252 is preferably designed asymmetrically and preferably has a sawtooth profile. In this case, a self-locking effect can be produced by the relatively steep angle of the profile, thereby preventing an undesired adjustment of the depth adjustment device 150 by exerting a force on the protective cap 230. Alternatively, the first locking contour 252 can also be designed symmetrically.
[0056] As shown, the first latching contour 252 is divided into two latching sections 622, 624. Here, each latching section 622, 624 is arranged outside the recess 640 in the side or radial direction 608. The right latching section 622 shown has an exemplary latching element 623, whose tip 627 is shown pointing downward. The left latching section 624 shown has an exemplary latching element 625, whose tip 629 is shown pointing upward. Therefore, the latching element 623 and the latching element 625 are preferably arranged opposite or opposite to each other.
[0057] Preferably, the brake element 250 has at least one guide element 631, 632 for Figures 2 to 4 The guide rail 240 is guided. Two guide elements 631, 632 are shown schematically, wherein the guide element 631 is schematically arranged above the recess 640 and the guide element 632 is exemplarily arranged below the recess 640. Preferably, the guide elements 631, 632 are arranged between the two latching sections 622, 624.
[0058] Preferably, the guide elements 631, 632 protrude beyond the latching sections 622, 624 in the transverse direction 609 of the latching element 250. Preferably, the guide elements 631, 632 are configured to prevent the first braking contour 252 from being moved relative to the guide rail 240. Figure 2 and Figure 3 The second braking profile 244 is rotated.
[0059] Figure 7 Shows 1 to Figure 4 The locking element 250 of the depth adjustment device 150. Figure 7 The preferably curved support surface 610 of the latching element 250 is shown. In addition, Figure 7 The recess 710 formed on the cylindrical base body 605 of the latching element 250 is shown. Preferably, the recess 710 is formed in the radial direction 608 .
[0060] Figure 8 Shows Figures 1 to 4 1 and 15 , and shows an enlarged detail of a guide rail 240 of a depth adjustment device 150 and a second latching contour 244. The second latching contour 244 is preferably integrated into the guide rail 240. Here, the second latching contour 244 can be produced by forging. In addition, the second latching contour 244 can be produced during production, for example, if the guide rail 240 is produced as a casting, in particular a die casting. Alternatively, the second latching contour 244 is also produced as a separate component and is fastened to the guide rail 240 by a suitable connection. Preferably, the suitable connection is configured as a screw connection or is produced by ultrasonic welding.
[0061] Similar to the latching element 250, the guide rail 240 or the second latching profile 244 is also divided into two latching sections 811, 812. Here, the latching sections 811, 812 are arranged on the sides of the recess 243. The right latching section 811 shown has an exemplary latching element 813, whose tip 827 is shown to the bottom shown. The left latching section 812 shown has an exemplary latching element 815, whose tip 829 is shown to the top shown. Therefore, the latching element 813 and the latching element 815 are preferably arranged oppositely or relative to each other. In addition, the second latching profile 244 is preferably asymmetrically configured and preferably has a sawtooth profile. Alternatively, the second latching profile 244 can also be symmetrically configured.
[0062] Fig. 9 Show Figures 1 to 4 The depth adjustment device 150 is shown in Figure 2 In the direction of the arrow 297 of FIG. 2 , the locking position 900 is formed. In the locking position 900 , the first and second latching contours 252 , 244 form the locking connection 290 .
[0063] Fig. 9 The arrangement of the spring element 340 on the outer circumference of the holding section 314 of the protective cover 230 and in the recess 710 of the latching element 250 is shown. In addition, the latching element 250 is positioned in the recess 514 of the operating element 220. In addition, the guide rail 240 is arranged on the holding section 314 of the protective cover 230 via a pin 242. The latching element 250 is loaded toward the guide rail 240 by the spring force of the spring element 340, which is indicated by the arrow 901. In addition, the guide rail 240 is supported by the pin. Here, the pin exerts a force, which is indicated by the arrow 902. In addition, Fig. 9 The support of the hook section 322 on the screw head 460 of the rotation axis 260 is shown.
[0064] Fig.10 Shows Figures 1 to 4 and Fig. 9 The depth adjustment device 150, in Figure 2 298 in the direction of the arrow 298, in the unlocked position 100, in which the first and second latching contours 252, 244 do not form the latching connection 290. Fig.10 , the operating element 220 is actuated or acted upon in the direction of the arrow 1001, so that the latching element 250 is released from the guide rail 240 against the spring force of the spring element 340. Thus, the first and second latching contours 252, 244 are spaced apart from each other. Fig. 9 The latching connection 290 is thereby released and the cutting depth is adjusted.
[0065] Fig.11 Along Figure 2 The view looking in the direction of arrow 297 shows Fig.10 The depth adjustment device 150. Arrow 1102 is Fig.11 The force of the operating element 220 is shown in FIG. 9 , which is required to release the spring force of the spring element 340 shown by arrow 901. Fig. 9 The latch connection 290 is provided.
[0066] Fig.12 Shows Figures 1 to 4 and Figures 9 to 11 A depth adjustment device 150 is provided in the embodiment, wherein, according to one embodiment, a safety element 1210 is associated with the operating element 220, which prevents accidental actuation of the operating element 220. Here, the operating element 220 can be actuated along a first actuation direction 1202, and the safety element 1210 can be actuated along a second actuation direction 1201. Preferably, the first and second actuation directions 1202 and 1201 are different.
[0067] It should be noted that the operating element 220 can alternatively be flexibly configured. In this case, when the operating element 220 is actuated, an elastic deformation of the operating element 220 is achieved.
Claims
1. A hand-held circular saw (100), comprising: a housing (110), in which a drive motor (120) for rotationally driving a circular saw blade (140) is arranged; and a depth adjustment device (150) for adjusting the cutting depth of the circular saw blade (140) in a workpiece to be processed, wherein: The depth adjustment device (150) has an arc-shaped guide rail (240) with an arc-shaped recess (243) and an operating element (220) for adjusting the cutting depth, characterized in that a locking element (250) with a first locking contour (252) is assigned to the operating element (220), and the guide rail (240) has a second locking contour (244), wherein the first locking contour (252) for adjusting the cutting depth can be connected to the second locking contour (244) via a locking connection (290).
2. The handheld circular saw according to claim 1, characterized in that: The operating element (220) is arranged on the arc-shaped guide rail (240) so as to be pivotable.
3. The handheld circular saw according to claim 1 or 2, characterized in that: A protective cover (230) is arranged on the circular saw blade (140), and when the cutting depth is adjusted, the protective cover can swing along with the circular saw blade (140), wherein the protective cover (230) is connected to the arcuate guide rail (240) via a pin (242) guided in the arcuate guide rail (240).
4. A hand-held circular saw according to any one of the preceding claims, characterised in that A spring element (340) is associated with the locking element (250) and urges the locking element (250) toward the arc-shaped guide rail (240).
5. A hand-held circular saw according to any one of the preceding claims, characterised in that The operating element (220) has a receptacle (512) for receiving the locking element (250) in sections.
6. The handheld circular saw according to claim 5, characterized in that The receiving portion (512) has a recess (514) for positioning the locking element (250).
7. The handheld circular saw according to claim 5 or 6, characterized in that: The locking element (250) has a support surface (610) that can be arranged in the receiving portion (512), wherein the support surface (610) is curved along a transverse direction (609) of the locking element (250).
8. A hand-held circular saw according to any one of the preceding claims, characterised in that The first latching contour (252) and the second latching contour (244) are designed at least in sections to be asymmetrical or symmetrical.
9. A hand-held circular saw according to any one of the preceding claims, characterised in that The locking element (250) has at least one guide element (631, 632) for guiding in the guide rail (240).
10. A hand-held circular saw according to any one of the preceding claims, characterised in that The operating element (220) is assigned a safety element (1210), which prevents accidental operation of the operating element (220), wherein the operating element (220) can be operated in a first operating direction (1202) and the safety element (1210) can be operated in a second operating direction (1201), wherein the first operating direction and the second operating direction (1202, 1201) are different.