An electric circular saw with a convenient depth adjustment

Abstract

The utility model relates to electric tool technical field, and disclose a kind of electric circular saw of cutting depth is conveniently adjusted, bottom plate top side is fixed with first connecting frame, first connecting frame side is slidably connected with second connecting frame, second connecting frame side is fixed with fixed frame, and fixed frame top side is hinged with protective cover;Protective cover inside is equipped with motor, and motor output shaft end is fixed with saw blade located in the inboard of protective cover;User only needs to hold one side of fuselage with single hand, rotates the knob in adjusting assembly with thumb, and knob drives second pivot to rotate, drives first pivot to rotate by the transmission of second pulley, belt and first pulley, and the thread connection of first pivot and flat head bolt makes that flat head bolt can gradually loosen or lock when rotating first pivot, after flat head bolt loosens, first casing and second casing can rotate freely around the hinged axle of fixed frame, suitable for quickly adjusting depth under various working scenarios, improve work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, specifically to an electric circular saw that allows for convenient adjustment of cutting depth. Background Technology

[0002] An electric circular saw is a tool that uses a single-phase series-wound electric motor as its power source and then drives a circular saw blade through a transmission mechanism to perform sawing operations. It is characterized by safety, reliability, and high work efficiency. As a commonly used power tool, the electric circular saw is widely used for cutting various materials.

[0003] Existing circular saws present numerous inconveniences in terms of cutting depth adjustment. Some circular saws have complex cutting depth adjustment mechanisms, requiring the use of multiple additional tools, such as wrenches and screwdrivers, to complete the adjustment operation. Users must use a wrench to loosen and tighten multiple bolts sequentially to adjust the saw blade height, a cumbersome and time-consuming process. Therefore, this paper proposes a circular saw with a convenient cutting depth adjustment mechanism. Utility Model Content

[0004] The purpose of this invention is to provide an electric circular saw with easily adjustable cutting depth to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an electric circular saw with convenient adjustment of cutting depth, comprising a base plate, a first connecting frame fixed on one side of the top of the base plate, a second connecting frame slidably connected to one side of the first connecting frame, a fixing frame fixed on one side of the second connecting frame, and a protective cover hinged to the top of the fixing frame; A motor is installed inside the protective cover, and a saw blade located inside the protective cover is fixed to the output shaft end of the motor. A second housing is fixed to one side of the protective cover, and a first housing is bolted to one side of the second housing. A straightedge assembly is provided on one side of the base plate, and an adjustment assembly is provided on one side of the second housing. The adjustment assembly includes a first rotating shaft and a second rotating shaft. One end of the first rotating shaft is provided with a threaded hole, and a flat-head bolt is threaded into the threaded hole. A second pulley and a knob are fixedly sleeved on the outer side of the second rotating shaft.

[0006] Preferably, both the first connecting frame and the second connecting frame have arc-shaped grooves on one side, the arc-shaped grooves are connected by bolts, and the fixing frame is hinged to the top side of the base plate.

[0007] Preferably, a first pulley is fixedly sleeved on the outer side of the first rotating shaft, and a belt is connected to the outer side of the first pulley and the second pulley.

[0008] Preferably, a bracket is hinged to one side of the top of the base plate, and a through hole is opened on one side of the bracket, with the outer side of the flat-head bolt inserted into the inner side of the through hole.

[0009] Preferably, both the first and second rotating shafts are rotatably connected to the inner walls of the first and second housings, and the round head of the flat-head bolt is located on the outside of the bracket.

[0010] Preferably, the straightedge assembly includes a scale with two limiting grooves on one side, a sliding column inserted into the inner side of the limiting groove, and a limiting bracket fixed on one side of the sliding column.

[0011] Preferably, the limiting frame and the scale are connected by bolts, and the outer side of the scale is inserted into one side of the base plate.

[0012] Preferably, a battery pack is installed at the tail of the first and second housings, and a switch is installed on the surface of the first and second housings. The output terminal of the battery pack is electrically connected to the input terminal of the switch, and the output terminal of the switch is electrically connected to the input terminal of the motor.

[0013] Compared with the prior art, the present invention, by adopting the above technical solution, has the following technical effects: 1. When the scale or limit bracket is damaged, the parts can be easily separated and replaced simply by removing the bolts connecting the two. When reinstalling the parts, inserting the sliding column into the limit groove can achieve pre-positioning of the two, saving maintenance time and costs. This makes subsequent bolt fixing more accurate and faster, avoiding problems such as unstable equipment operation or reduced cutting accuracy caused by inaccurate installation position, and improving installation efficiency.

[0014] 2. The user only needs to hold one side of the machine body with one hand and rotate the knob in the adjustment component with their thumb. The knob drives the second shaft to rotate, and through the transmission of the second pulley, belt and the first pulley, the first shaft rotates. The first shaft is threadedly connected to the flat-head bolt, so that the flat-head bolt can be gradually loosened or tightened when the first shaft is rotated. After the flat-head bolt is loosened, the first and second housings can rotate freely around the hinge axis with the fixed frame. The user holds the base plate and uses the cooperation of the bracket and the flat-head bolt to drive the first housing, the second housing and the saw blade to adjust the height smoothly, realizing flexible adjustment of the cutting depth. No additional tools or complicated operation steps are required. The operation method is simple and direct, which greatly reduces the difficulty of operation. It is especially suitable for quick depth adjustment in various working scenarios and improves work efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a schematic diagram of the second-view structure of the present invention; Figure 3 This is a schematic cross-sectional view of the bracket and flat-head bolt connection of this utility model. Figure 4 This is a schematic diagram of the belt connection structure of this utility model; Figure 5 This is a schematic diagram of the support structure of this utility model; Figure 6 This is a schematic diagram of the scale structure of this utility model; Figure 7 This is a schematic diagram of the limiting frame structure of this utility model.

[0017] Explanation of reference numerals in the attached drawings: 1. Base plate; 2. Straightedge assembly; 21. Scale; 22. Limiting bracket; 23. Limiting groove; 24. Sliding column; 3. Saw blade; 4. Protective cover; 5. Adjustment assembly; 51. Bracket; 52. Flat head bolt; 53. First rotating shaft; 54. First pulley; 55. Belt; 56. Second pulley; 57. Second rotating shaft; 58. Knob; 6. First connecting frame; 7. Second connecting frame; 8. First housing; 9. Second housing; 10. Battery pack; 11. Fixing bracket; 12. Switch. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0020] Example Please see Figure 1-7 This utility model provides a technical solution: an electric circular saw that is easy to adjust the cutting depth, including a base plate 1, a dimension line is provided at the front end of the base plate 1, a first connecting frame 6 is fixed on one side of the top of the base plate 1, a second connecting frame 7 is slidably connected to one side of the first connecting frame 6, an angle line is provided on one side of the first connecting frame 6, a fixing frame 11 is fixed on one side of the second connecting frame 7, and a protective cover 4 is hinged to one side of the top of the fixing frame 11. Both the first connecting frame 6 and the second connecting frame 7 have arc-shaped grooves on one side, which are connected by bolts. The fixing frame 11 is hinged to the top side of the base plate 1 and is fixed by bolts. When the cutting angle needs to be adjusted, the user loosens the bolts connecting the first connecting frame 6 and the second connecting frame 7, allowing the second connecting frame 7 to slide along the arc-shaped groove. Since the fixing frame 11 is hinged to the top side of the base plate 1, the sliding of the second connecting frame 7 will cause the fixing frame 11 and the protective cover 4 to rotate, thereby changing the angle between the saw blade 3 and the base plate 1. After adjusting to the required angle, tightening the bolts will clamp and fix the first connecting frame 6 and the second connecting frame 7, thus locking the angle and allowing the user to perform cutting operations at different angles.

[0021] A motor is installed inside the protective cover 4, and a saw blade 3 located inside the protective cover 4 is fixed to the output shaft end of the motor; a second housing 9 is fixed to one side of the protective cover 4, and a first housing 8 is bolted to one side of the second housing 9; a straightedge assembly 2 is provided on one side of the base plate 1, and an adjustment assembly 5 is provided on one side of the second housing 9; The adjustment assembly 5 includes a first rotating shaft 53 and a second rotating shaft 57. One end of the first rotating shaft 53 has a threaded hole, through which a flat-head bolt 52 is threaded. A second pulley 56 and a knob 58 are fixedly sleeved on the outer side of the second rotating shaft 57. When adjusting the cutting depth, the user holds the machine and rotates the knob 58 with their thumb. The knob 58 is fixed to the second rotating shaft 57, so rotating the knob 58 will drive the second rotating shaft 57 to rotate via a bearing. A first pulley 54 is fixedly sleeved on the outer side of the first rotating shaft 53. A belt 55 is connected to the outer side of the first pulley 54 and the second pulley 56. A tensioning pulley (not shown in the figure) is provided on one side of the belt 55. The belt 55 can be a synchronous belt or a wedge belt. The second pulley 56 is fixedly sleeved on the second rotating shaft 57, and the second pulley 56 drives the first pulley 54 to rotate via the belt 55. The first pulley 54 is fixed to the first rotating shaft 53, so the first rotating shaft 53 rotates accordingly.

[0022] A bracket 51 is hinged to one side of the top of the base plate 1, and the bracket 51 is fixed to one side of the protective cover 4. The surface of the bracket 51 is provided with scale lines, and the first housing 8 is provided with an indicator mark on one side of the scale lines. A through hole is opened on one side of the bracket 51, and the outer side of the flat-head bolt 52 is inserted into the inner side of the through hole. One end of the first rotating shaft 53 is provided with a threaded hole, which is threadedly connected to the flat-head bolt 52. When the first rotating shaft 53 rotates, the flat-head bolt 52 moves under the action of the thread and is inserted into the through hole of the bracket 51. The bracket 51 is fixed to one side of the top of the base plate 1. In the initial state, the flat-head bolt 52 is locked with the bracket 51, fixing the position of the first housing 8 and the second housing 9.

[0023] When the user rotates knob 58 clockwise, the first rotating shaft 53 loosens the flat-head bolt 52, meaning the round head of the flat-head bolt 52 disengages from the clamping of the bracket 51, thereby releasing the fixation of the first housing 8 and the second housing 9. At this time, the user can use their other hand to press down on the base plate 1 to adjust the position of the housing, causing the first housing 8 and the second housing 9 to rotate around the hinge axis of the fixing frame 11, thereby changing the height of the saw blade 3 relative to the base plate 1 and adjusting the cutting depth.

[0024] Both the first rotating shaft 53 and the second rotating shaft 57 are rotatably connected to the inner walls of the first housing 8 and the second housing 9. The round head of the flat-head bolt 52 is located on the outside of the bracket 51. After adjusting to the required depth, the user rotates the knob 58 in the opposite direction to re-lock the bracket 51 with the flat-head bolt 52, thereby fixing the position of the first housing 8 and the second housing 9 and completing the depth adjustment. The entire process allows the user to operate quickly and with one hand, meeting the requirements of different cutting depths.

[0025] The ruler assembly 2 includes a ruler 21. Two limiting grooves 23 are provided on one side of the ruler 21. A sliding column 24 is inserted into the inner side of the limiting groove 23. The sliding column 24 is made of metal. A limiting bracket 22 is fixed on one side of the sliding column 24. The limiting bracket 22 and the ruler 21 are connected by bolts. The outer side of the ruler 21 is inserted into one side of the base plate 1. The ruler 21 is inserted into one side of the base plate 1 and the ruler 21 is clamped and fixed to the base plate 1 with bolts. The cutting width can be adjusted by adjusting the distance between the limiting bracket 22 and the base plate 1. When either the ruler 21 or the limiting bracket 22 is damaged, the connecting bolts can be removed to separate the ruler 21 and the limiting bracket 22. During installation, the sliding column 24 is first inserted into the inner side of the limiting groove 23 to pre-position the ruler 21 and the limiting bracket 22.

[0026] A battery pack 10 is installed at the tail of the first housing 8 and the second housing 9. A switch 12 is installed on the surface of the first housing 8 and the second housing 9. The output terminal of the battery pack 10 is electrically connected to the input terminal of the switch 12, and the output terminal of the switch 12 is electrically connected to the input terminal of the motor.

[0027] Working principle: First, the battery pack 10 is installed at the tail of the first housing 8 and the second housing 9. At this time, the output end of the battery pack 10 is electrically connected to the input end of the switch 12 to provide power to the entire electric circular saw. When the user needs to start the electric circular saw for cutting operations, he / she presses the switch 12 installed on the surface of the first housing 8 and the second housing 9. The output end of the switch 12 transmits power to the motor installed inside the protective cover 4. After the motor is powered on, it starts to run, which in turn drives the saw blade 3 fixed at the output shaft end of the motor to rotate, providing power for the cutting action. Before cutting, insert the scale 21 of the straightedge assembly 2 into one side of the base plate 1, and then use bolts to clamp and fix the scale 21 to the base plate 1, thus completing the connection between the straightedge assembly 2 and the main body of the electric circular saw. Adjust the distance between the limit frame 22 and the base plate 1 according to the required cutting width. If the scale 21 or the limit frame 22 is damaged, simply remove the bolts connecting the two to separate the parts for replacement. When reinstalling, insert the sliding column 24 into the limit groove 23 to achieve pre-positioning of the two, which facilitates subsequent bolt fixing. When it is necessary to adjust the wood cutting angle, loosen the connecting bolts between the first connecting frame 6 and the arc groove of the second connecting frame 7, push the second connecting frame 7 to drive the fixed frame 11 to rotate around its hinge axis with the base plate 1, thereby causing the protective cover 4 hinged to the fixed frame 11, as well as the first housing 8 and the second housing 9 fixed to one side of the protective cover 4 to rotate synchronously, ultimately causing the saw blade 3 to form different angles with the base plate 1. After the angle is adjusted to the required state, tighten the bolts between the first connecting frame 6 and the second connecting frame 7 to clamp and fix the two. At this time, the angle of the saw blade 3 is fixed, and cutting operations at the corresponding angle can be performed. When the cutting depth needs to be adjusted, the user holds one side of the machine body and rotates the knob 58 in the adjustment component 5 with their thumb. The knob 58 drives the second rotating shaft 57, which is fixedly sleeved with it, to rotate. At the same time, the second pulley 56 fixed on the outside of the second rotating shaft 57 rotates synchronously. The second pulley 56 drives the first pulley 54 to rotate through the belt 55 connected to the outside. The first pulley 54 is fixedly sleeved on the outside of the first rotating shaft 53, thereby driving the first rotating shaft 53 to rotate. Since the threaded hole at one end of the first rotating shaft 53 is threadedly connected to the flat-head bolt 52, the rotation of the first rotating shaft 53 causes the flat-head bolt 52 to gradually loosen. The flat-head bolt 52 is inserted into a through hole on one side of the bracket 51 fixed on the top side of the base plate 1. After the flat-head bolt 52 is loosened, the first housing 8 and the second housing 9 can rotate freely around the hinge axis with the fixed frame 11. At this time, the user holds the base plate 1 with his other hand and adjusts the height of the first housing 8, the second housing 9 and the saw blade 3 through the cooperation of the bracket 51 and the flat-head bolt 52 until the required cutting depth is reached. After the cutting depth is adjusted, the knob 58 is rotated in the opposite direction, which drives the second rotating shaft 57, the second pulley 56, the belt 55, the first pulley 54 and the first rotating shaft 53 to rotate in the opposite direction in sequence, so that the first rotating shaft 53 and the flat-head bolt 52 are locked again, thereby fixing the bracket 51 and completing the adjustment and locking of the cutting depth. The user can repeat this process at any time to adjust the depth to meet different cutting needs.

[0028] After adjusting the cutting width, angle, and depth, ensure that the saw blade 3 has been started and rotated by the motor. Place the wood against the limiting frame 22 of the base plate 1 and the straightedge assembly 2, and push the electric circular saw to move along the preset cutting path of the wood. The rotating saw blade 3 cuts the wood until the work is completed. After the work is completed, release the switch 12, the motor stops running, and the saw blade 3 stops rotating.

[0029] In summary, when the scale 21 or the limit bracket 22 is damaged, the parts can be easily separated and replaced simply by removing the bolts connecting them. When reinstalling the parts, inserting the sliding column 24 into the limit groove 23 can achieve pre-positioning of the two parts, saving maintenance time and costs. This makes subsequent bolt fixing more accurate and faster, avoiding problems such as unstable equipment operation or reduced cutting accuracy caused by inaccurate installation position, and improving installation efficiency.

[0030] The user only needs to hold one side of the machine body with one hand and rotate the knob 58 in the adjustment component 5 with their thumb. The knob 58 drives the second rotating shaft 57 to rotate. Through the transmission of the second pulley 56, belt 55 and first pulley 54, the first rotating shaft 53 is rotated. The first rotating shaft 53 is threadedly connected to the flat-head bolt 52, so that the flat-head bolt 52 can be gradually loosened or tightened when the first rotating shaft 53 is rotated. After the flat-head bolt 52 is loosened, the first housing 8 and the second housing 9 can rotate freely around the hinge axis with the fixed frame 11. The user holds the base plate 1 and uses the cooperation of the bracket 51 and the flat-head bolt 52 to drive the first housing 8, the second housing 9 and the saw blade 3 to smoothly adjust the height, realizing flexible adjustment of the cutting depth. No additional tools or complicated operation steps are required. The operation method is simple and direct, which greatly reduces the difficulty of operation. It is especially suitable for quick depth adjustment in various working scenarios and improves work efficiency.

[0031] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this utility model. In particular, the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways without departing from the spirit and teachings of this utility model. All such combinations and / or combinations fall within the scope of this utility model.

Claims

1. A circular saw with easily adjustable cutting depth, comprising a base plate (1), characterized in that, A first connecting frame (6) is fixed on one side of the top of the base plate (1), a second connecting frame (7) is slidably connected to one side of the first connecting frame (6), a fixing frame (11) is fixed on one side of the second connecting frame (7), and a protective cover (4) is hinged to one side of the top of the fixing frame (11). A motor is installed inside the protective cover (4), and a saw blade (3) located inside the protective cover (4) is fixed at the output shaft end of the motor. The protective cover (4) is fixed with a second housing (9) on one side, and the second housing (9) is connected to a first housing (8) by bolts on one side. The base plate (1) is provided with a straightedge assembly (2) on one side, and the second housing (9) is provided with an adjustment assembly (5) on one side. The adjustment assembly (5) includes a first rotating shaft (53) and a second rotating shaft (57). One end of the first rotating shaft (53) is provided with a threaded hole, and a flat-head bolt (52) is threadedly connected to the threaded hole. The second shaft (57) is fixedly fitted with a second pulley (56) and a knob (58) on its outer side.

2. The electric circular saw with easily adjustable cutting depth according to claim 1, characterized in that, The first connecting frame (6) and the second connecting frame (7) are provided with arc-shaped grooves on one side, and the arc-shaped grooves are connected by bolts. The fixing frame (11) is hinged to the top side of the base plate (1).

3. The electric circular saw with easily adjustable cutting depth according to claim 1, characterized in that, A first pulley (54) is fixedly sleeved on the outside of the first rotating shaft (53), and a belt (55) is connected to the outside of the first pulley (54) and the second pulley (56).

4. The electric circular saw with easily adjustable cutting depth according to claim 3, characterized in that, A bracket (51) is hinged to one side of the top of the base plate (1). A through hole is opened on one side of the bracket (51), and the outer side of the flat-head bolt (52) is inserted into the inner side of the through hole.

5. The electric circular saw with easily adjustable cutting depth according to claim 4, characterized in that, The first rotating shaft (53) and the second rotating shaft (57) are both rotatably connected to the inner walls of the first housing (8) and the second housing (9), and the round head of the flat-head bolt (52) is located outside the bracket (51).

6. The electric circular saw with convenient adjustable cutting depth according to claim 1, characterized in that, The ruler assembly (2) includes a ruler (21), with two limiting grooves (23) on one side of the ruler (21), and a sliding column (24) inserted inside the limiting groove (23). A limiting bracket (22) is fixed on one side of the sliding column (24).

7. The electric circular saw with easily adjustable cutting depth according to claim 6, characterized in that, The limiting frame (22) and the scale (21) are connected by bolts, and the outer side of the scale (21) is inserted into one side of the base plate (1).

8. The electric circular saw with convenient adjustable cutting depth according to claim 1, characterized in that, A battery pack (10) is installed at the tail of the first housing (8) and the second housing (9). A switch (12) is installed on the surface of the first housing (8) and the second housing (9). The output terminal of the battery pack (10) is electrically connected to the input terminal of the switch (12). The output terminal of the switch (12) is electrically connected to the input terminal of the motor.

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