A hand-held electric circular saw

Abstract

The application relates to the technical field of electric tools, in particular to a handheld electric circular saw which comprises a bottom support frame and an electric circular saw body, the electric circular saw body contains a main body, a protective cover and a cutting saw controlled by the main body, an electric control type adjusting frame is hingedly connected to the upper end of the bottom support frame above a cutting opening, the protective cover is installed on the side wall of the electric control type adjusting frame, and electric control type auxiliary walking units are fixedly arranged at the two ends of the bottom support frame. The height and angle of the electric circular saw can be adjusted in the electric control adjusting mode, the whole height and angle adjusting does not need manual control, the stability and adjusting precision are greatly improved, the bottom support frame can be placed on the surface of cutting materials through height adjusting, and then the electric circular saw body is controlled to descend for cutting, so that the initial cutting precision and efficiency can be greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric tools, in particular to a hand-held electric circular saw. BACKGROUND

[0002] The electric circular saw is a tool that drives the circular saw blade to sawing operation through the transmission mechanism with the single-phase series motor as the power, which has the characteristics of safety and reliability, reasonable structure, high working efficiency, etc. It is suitable for sawing operation on wood, fiberboard, plastic and soft cable and similar materials. The traditional electric circular saw on the market needs to apply downward pressure during cutting, and then operates along the marking line on the cutting surface. However, the operation completely relies on human power, which requires high personal proficiency, has great operation limitations, and the vibration generated during cutting further increases the operation difficulty of the electric circular saw. SUMMARY

[0003] The technical problem to be solved by the present application is that the traditional electric circular saw on the market completely relies on human power, which requires high personal proficiency, has great operation limitations, and has high difficulty.

[0004] The technical scheme adopted by the present application to solve the technical problem is: a hand-held electric circular saw, comprising a bottom support frame and an electric circular saw body, the electric circular saw body comprising a main body, a protective cover and a cutting saw controlled by the main body, the upper end of the bottom support frame being hingedly connected with an electrically controlled adjusting frame above the cutting opening, the protective cover being installed on the side wall of the electrically controlled adjusting frame, and the two ends of the bottom support frame being fixedly provided with electrically controlled auxiliary walking units.

[0005] The main body is fixed outside the protective cover, and the cutting saw is axially assembled on the lateral output shaft of the main body.

[0006] The upper end of the bottom support frame has upwardly protruding lateral assembly seats at both ends of the cutting opening, and the electrically controlled adjusting frame is movably assembled with the lateral assembly seats by inserting the assembly shafts on both sides into the interior of the lateral assembly seats.

[0007] The electrically controlled adjusting frame comprises a turnover frame with assembly shafts on both sides, a control worm fixed axially outside the assembly shaft, a driving worm movably installed in the interior of the lateral assembly seat, a synchronous control shaft in meshing transmission with the tooth head at the end of the driving worm, a lateral motor coaxially fixed with the synchronous control shaft, a first lateral electric control screw rod installed in the interior of the turnover frame, and a internally threaded adjusting seat screwed on the first lateral electric control screw rod.

[0008] A lateral transmission shaft cylinder for installing the synchronous control shaft and the lateral motor is fixedly assembled at one side of the upper end of the bottom support frame above the cutting opening.

[0009] The protective cover is bolted to the outer side of the internally threaded adjusting seat.

[0010] The electrically controlled auxiliary walking unit comprises a first guide rail and a second guide rail fixed to one side of the lower end of the bottom support frame, a third guide rail and a fourth guide rail fixed to the other side of the lower end of the bottom support frame, an internal walking foot, and a magnetic control limiting claw hook.

[0011] The first guide rail, the second guide rail, the third guide rail, and the fourth guide rail are internally provided with a second lateral electrically controlled screw rod for controlling the internal walking foot.

[0012] The internal walking foot is internally provided with an internally threaded adjusting hole, and an internal telescopic slot is formed on one side of the internally threaded adjusting hole.

[0013] The magnetic control limiting claw hook comprises an electromagnet fixed in the internal telescopic slot, a ferrous spring plate installed at the upper end of the electromagnet, and a traceless limiting nail installed at the lower end of the ferrous spring plate.

[0014] The beneficial effects of the present application are:

[0015] (1) The height and angle of the handheld electric circular saw can be adjusted by electric control, and the entire height and angle adjustment does not need to be manually controlled, so that the stability and adjustment accuracy are greatly improved.

[0016] (2) By adjusting the height, the bottom support frame can be placed on the surface of the cutting material, and then the electric circular saw body can be controlled to descend for cutting, so that the initial cutting accuracy and efficiency can be greatly improved.

[0017] (3) The electrically controlled auxiliary walking unit is installed at both ends of the bottom support frame, which can be adjusted by the way of staggered limiting translation walking, without the need for manual control of cutting translation, so that the operation difficulty is greatly reduced, and the stability of cutting translation is ensured.

[0018] (4) The electrically controlled adjusting frame adopts a worm gear assembly for angle adjustment, which can maintain the structural stability after angle adjustment. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described below in conjunction with the drawings and examples.

[0020] Figure 1 is a structural schematic diagram of the present application.

[0021] Figure 2 is a transmission schematic diagram of the electrically controlled adjusting frame in the present application.

[0022] Figure 3 is a bottom view of the electrically controlled auxiliary walking unit in the present application.

[0023] Figure 4 is the internal schematic diagram of the hook assembly end of the magnetic control limit pawl in the application.

[0024] Figure 5 is the structural schematic diagram of the magnetic control limit pawl hook in the application.

[0025] Figure 6 is the running state schematic diagram in the application. DETAILED DESCRIPTION

[0026] The application will now be described in further detail with reference to the drawings. These drawings are simplified schematic diagrams which only show the basic structure of the application in a schematic manner, and thus only show the components relevant to the application.

[0027] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0028] Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 A hand-held electric circular saw is shown in the drawings, which comprises a bottom support frame 1 and an electric circular saw body, the electric circular saw body comprising a main body 2, a protective cover 3 and a cutting saw 4 controlled by the main body 2, an electrically controlled adjusting frame 5 is hingedly connected to the upper end of the bottom support frame 1 above the cutting opening, the protective cover 3 is installed on the side wall of the electrically controlled adjusting frame 5, and electrically controlled auxiliary walking units 6 are fixedly assembled at both ends of the bottom support frame 1.

[0029] In order to cooperate with installation and driving, the main body 2 is fixed outside the protective cover 3, and the cutting saw 4 is axially assembled on the lateral output shaft of the main body 2.

[0030] In order to cooperate with lateral assembly, the upper end of the bottom support frame 1 has an upwardly protruding lateral assembly seat 7 at both ends of the cutting opening, and the electrically controlled adjusting frame 5 is movably assembled with the lateral assembly seat 7 by inserting the lateral assembly seat 7 inside through the two side assembly shafts.

[0031] In order to adjust the lateral screw, the electric control adjusting frame 5 comprises a turnover frame 51 with assembling shafts on both sides, a control worm 52 fixed axially outside the assembling shafts, a driving worm 53 movably installed inside the lateral assembling seat 7, a synchronous control shaft 54 meshing with the end tooth head of the driving worm 53 for transmission, a lateral motor 55 coaxially fixed with the synchronous control shaft 54, a first lateral electric control screw 56 installed inside the turnover frame 51, and a internally threaded adjusting seat 57 screwed on the first lateral electric control screw 56.

[0032] The turnover angle of the electric control adjusting frame 5 is in a small range.

[0033] The lateral motor 55 drives the synchronous control shaft 54 to rotate, and then the synchronous control shaft 54 synchronously drives the driving worms 53 on both sides to rotate through the end tooth head, and then the driving worms 53 drive the control worm 52 to rotate, so as to change the angle of the turnover frame 51, and adjust the angle of the whole electric circular saw body, so as to change the angle of the cutting surface.

[0034] The first lateral electric control screw 56 is rotated to drive the internally threaded adjusting seat 57 to ascend and descend along the turnover frame 51, so as to change the height of the electric circular saw body.

[0035] In order to cooperate with the lateral assembly, the lateral transmission shaft cylinder 8 for installing the synchronous control shaft 54 and the lateral motor 55 is fixedly assembled on the upper end of the bottom support frame 1 on the cutting opening side.

[0036] In order to cooperate with the installation and disassembly, the outer side of the protective cover 3 is bolted with the internally threaded adjusting seat 57.

[0037] In order to cooperate with the limiting and controlling, the electric control auxiliary walking unit 6 comprises a first bar rail 61 and a second bar rail 62 fixed on one side of the lower end of the bottom support frame 1, a third bar rail 63 and a fourth bar rail 64 fixed on the other side of the lower end of the bottom support frame 1, an internal walking foot 65, and a magnetic control limiting claw hook 66.

[0038] In order to cooperate with the electric control threaded control, the first bar rail 61, the second bar rail 62, the third bar rail 63, and the fourth bar rail 64 are internally provided with a second lateral electric control screw 67 for controlling the internal walking foot 65.

[0039] In order to cooperate with the installation and adjustment, the internal walking foot 65 is internally provided with an internally threaded adjusting hole, and an internal extension slot 68 is provided on one side of the internally threaded adjusting hole inside the internal walking foot 65.

[0040] The inner walking foot 65 is threadedly sleeved on the first, second, third and fourth bar-shaped guide rails 61, 62, 63 and 64 through the inner threaded adjusting holes, and when the second lateral electric control screw rod 67 inside the first and third bar-shaped guide rails 61 and 63 controls the inner walking foot 65 to translate, the second lateral electric control screw rod 67 inside the second and fourth bar-shaped guide rails 62 and 64 and the inner walking foot 65 remain stopped; when the second lateral electric control screw rod 67 inside the second and fourth bar-shaped guide rails 62 and 64 controls the inner walking foot 65 to translate, the second lateral electric control screw rod 67 inside the first and third bar-shaped guide rails 61 and 63 and the inner walking foot 65 remain stopped.

[0041] When it is needed to control the translation of the bottom support frame 1, the magnetic control limiting claw hook 66 on the inner walking foot 65 inside the first and third bar-shaped guide rails 61 and 63 is first inserted into the cutting surface, the second lateral electric control screw rod 67 inside the first and third bar-shaped guide rails 61 and 63 controls the inner walking foot 65 to translate and drives the entire bottom support frame 1 to translate, and after being translated to the maximum translation distance, the magnetic control limiting claw hook 66 on the inner walking foot 65 inside the second and fourth bar-shaped guide rails 62 and 64 is inserted into the cutting surface, the magnetic control limiting claw hook 66 on the inner walking foot 65 inside the first and third bar-shaped guide rails 61 and 63 is separated from the cutting surface, and then the second lateral electric control screw rod 67 inside the second and fourth bar-shaped guide rails 62 and 64 controls the inner walking foot 65 to translate, so as to control the entire bottom support frame 1 to continue to translate. After repeating the above operation, continuous translation adjustment can be realized.

[0042] In order to cooperate with the magnetic control, the magnetic control limiting claw hook 66 comprises an electromagnet 661 fixed inside the inner side telescopic groove 68, a ferrous spring 662 installed on the upper end of the electromagnet 661 and a traceless limiting nail 663 installed on the lower end of the ferrous spring 662.

[0043] The electromagnet 661 comprises a first electromagnet fixed on the inner top surface of the inner side telescopic groove 68 and a second electromagnet fixed on the inner bottom surface of the inner side telescopic groove 68, and through the starting of the first electromagnet and the closing of the second electromagnet, the ferrous spring 662 is controlled to overturn upwards and the traceless limiting nail 663 is controlled to separate the bottom part from the cutting surface; conversely, through the closing of the first electromagnet and the starting of the second electromagnet, the ferrous spring 662 is controlled to overturn downwards and the traceless limiting nail 663 is controlled to be inserted and limited with the cutting surface.

[0044] The operation process of the handheld electric circular saw completely relies on the electric control structure design in the patent, and the core revolves around the four steps of "preparation positioning → parameter adjustment → automatic translation cutting → end homing", and the specific steps are as follows:

[0045] I. Operation preparation: equipment positioning and state inspection

[0046] Place the bottom support frame 1 on the surface of the material to be cut (such as wood, soft cable, etc.), and ensure that the cutting opening is aligned with the pre-marked cutting line.

[0047] Check the status of the electrical control components of the equipment, including whether the lateral motor 55, electromagnet 661, first lateral electric control screw 56, and second lateral electric control screw 67 are normally powered, to ensure that the electrically controlled adjustment frame 5 and the electrically controlled auxiliary walking unit 6 can operate normally.

[0048] II. Parameter adjustment: electrically controlled setting of height and angle

[0049] 1. Height adjustment (adapt to cutting depth)

[0050] Start the first lateral electric control screw 56 in the electrically controlled adjustment frame 5. The rotation of the first lateral electric control screw 56 will drive the threaded sleeve adjustment seat 57 to rise and fall along the turnover frame 51.

[0051] Because the protective cover 3 is bolted to the inner threaded adjustment seat 57, the lifting of the inner threaded adjustment seat 57 will simultaneously drive the electric circular saw body (including the cutting saw 4) to move up and down until the cutting saw 4 reaches the desired cutting depth and stops.

[0052] 2. Angle adjustment (adapt to cutting surface angle)

[0053] Start the lateral motor 55, which drives the coaxially fixed synchronous control shaft 54 to rotate. The synchronous control shaft 54 and the lateral motor 55 are installed in the lateral transmission shaft cylinder 8 on the upper end of the bottom support frame 1 on one side of the cutting opening. The synchronous control shaft 54 drives the drive worm 53 in the two-sided lateral assembly seat 7 through the end tooth head.

[0054] The drive worm 53 meshes with the control worm 52 outside the assembly shaft to drive the turnover frame 51 to rotate around the assembly shaft of the lateral assembly seat 7, thereby changing the angle of the electric circular saw body (including the main body 2, the protective cover 3, and the cutting saw 4) and adjusting to the target cutting surface angle. Turn off the lateral motor 55 (the worm and gear structure can keep the angle stable).

[0055] III. Automatic translation cutting: realized by relying on electrically controlled auxiliary walking unit

[0056] This step realizes automatic cutting through "misaligned limiting translation" without the need for manual pushing. It is divided into three circular actions:

[0057] 1. First group of walking foot limiting and translation

[0058] Start the electromagnet 661 in the first and third linear guide rails 61, 63 (turn off the top first electromagnet, start the bottom second electromagnet), and the ferrous spring 662 flips down, driving the traceless limiting nail 663 to insert into the material surface, realizing the fixation of the two groups of internal walking feet 65.

[0059] Start the second lateral electric control screw 67 in the first and third linear guide rails 61, 63, which drives the internal walking feet 65 to translate along the guide rail, and then drags the entire bottom support frame 1 and the electric circular saw body to translate synchronously for cutting; until the internal walking feet 65 stop moving to the maximum stroke of the guide rail.

[0060] 2. Second group of walking feet switching and continuous cutting

[0061] Keep the cutting saw 4 running, start the electromagnet 661 in the second and fourth linear guide rails 62, 64 (the same reason for the traceless limiting nail 663 to insert into the material), and at the same time, turn off the electromagnet 661 in the first and third linear guide rails 61, 63 (the top first electromagnet starts, and the traceless limiting nail 663 separates from the material).

[0062] Start the second lateral electric control screw 67 in the second and fourth linear guide rails 62, 64, which drives the internal walking feet 65 to translate, and continues to drag the bottom support frame 1 and the electric circular saw body to move forward, completing the subsequent cutting.

[0063] 3. Circular translation (if long-distance cutting is required)

[0064] Repeat the above "first group of limiting translation → second group of switching and continuous cutting" actions until the entire cutting line is sawn; wherein the internal walking feet 65 are screw-threaded with the second lateral electric control screw 67 in each linear guide rail through the internal screw-thread adjustment hole, ensuring stable and controllable translation.

[0065] Four, operation end: equipment homing and power off

[0066] First, turn off the main body 2 of the cutting saw 4, and stop the rotation of the cutting saw 4.

[0067] Start the lateral first electric control screw 56 to raise the electric circular saw body, so that the cutting saw 4 completely separates from the material surface.

[0068] Turn off the power of all electric control components, move the bottom support frame 1 away from the material, and complete the operation.

[0069] With the above ideal embodiments according to the present application as the inspiration, through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A hand-held electric circular saw comprising a base support frame (1) and an electric circular saw body, characterized in that: The electric circular saw body comprises a main body (2), a protective cover (3) and a cutting saw (4) controlled by the main body (2), the upper end of the bottom support frame (1) is hingedly connected with an electrically-controlled adjusting frame (5) above the cutting opening, the protective cover (3) is installed on the side wall of the electrically-controlled adjusting frame (5), and electrically-controlled auxiliary walking units (6) are fixedly installed at the two ends of the bottom support frame (1). The electrically-controlled adjusting frame (5) comprises a turnover frame (51) provided with assembly shafts at the two sides, a control worm (52) fixed axially outside the assembly shafts, a driving worm (53) movably installed inside a lateral assembly seat (7), a synchronous control shaft (54) in meshing transmission with the tooth head at the end of the driving worm (53), a lateral motor (55) fixed coaxially with the synchronous control shaft (54), a first lateral electrically-controlled screw rod (56) installed inside the turnover frame (51) and an internally-threaded adjusting seat (57) screwed on the first lateral electrically-controlled screw rod (56). The electrically-controlled auxiliary walking units (6) comprise a first bar-shaped guide rail (61) and a second bar-shaped guide rail (62) fixed at one side of the lower end of the bottom support frame (1), a third bar-shaped guide rail (63) and a fourth bar-shaped guide rail (64) fixed at the other side of the lower end of the bottom support frame (1), an internal walking foot (65) and a magnetically-controlled limiting claw hook (66). The first bar-shaped guide rail (61), the second bar-shaped guide rail (62), the third bar-shaped guide rail (63) and the fourth bar-shaped guide rail (64) are internally provided with second lateral electrically-controlled screw rods (67) for controlling the internal walking foot (65).

2. A hand-held electric circular saw according to claim 1, characterized in that: The main body (2) is fixed outside the protective cover (3), and the cutting saw (4) is axially assembled on a lateral output shaft of the main body (2).

3. A hand-held electric circular saw according to claim 1, characterized in that: The upper end of the bottom support frame (1) is provided with upwardly-protruding lateral assembly seats (7) at the two ends of the cutting opening, and the electrically-controlled adjusting frame (5) is movably assembled with the lateral assembly seats (7) by inserting the assembly shafts at the two sides into the lateral assembly seats (7).

4. A hand-held electric circular saw according to claim 1, characterized in that: A lateral transmission shaft cylinder (8) for mounting the synchronous control shaft (54) and the lateral motor (55) is fixedly assembled at one side of the upper end of the bottom support frame (1) above the cutting opening.

5. The hand-held electric circular saw of claim 1 wherein: The protective cover (3) is bolted with the internally-threaded adjusting seat (57) outside.

6. A hand-held electric circular saw according to claim 1, characterized in that: An internally-threaded adjusting hole is formed in the internal walking foot (65), and an inside telescopic groove (68) is formed at one side of the internally-threaded adjusting hole in the internal walking foot (65).

7. A hand-held electric circular saw according to claim 6, characterized in that: The magnetically-controlled limiting claw hook (66) comprises an electromagnet (661) fixed inside the inside telescopic groove (68), a ferrous spring piece (662) installed at the upper end of the electromagnet (661) and a traceless limiting nail (663) installed at the lower end of the ferrous spring piece (662).

Images