Locking device for saw blade

Abstract

The utility model discloses a locking device for a saw blade, which comprises a placing base and a rack main body, the rack main body is arranged on the placing base, an output shaft rotationally connected with the rack main body is arranged in the rack main body, a gear synchronously rotating with the output shaft is arranged on the output shaft, and a motor in the rack main body drives the gear to rotate when working; a flange face is arranged at the end, back to the gear, of the output shaft, and a saw blade body synchronously rotating with the output shaft is arranged on the flange face. A pressing plate is arranged at the end, back to the gear, of the saw blade body, and a locking piece for fixing the output shaft and the saw blade body is arranged between the output shaft and the saw blade body. The flange face is arranged on the output shaft, so that the saw blade is directly positioned, the other end of the saw blade is limited through the pressing plate and fixed through the locking piece, the locking effect of the saw blade is better, and work is more stable and reliable.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric saws, and particularly relates to a locking device for a saw blade. Background Art

[0002] An electric saw is a commonly used cutting tool. The traditional saw blade locking method is to install a pressing plate on each of the front and rear end faces of the saw blade, and then lock it with bolts. Although such a locking method can fix the saw blade, the processing process of the pressing plate is relatively cumbersome. The pressing plate processed by the traditional processing method has low precision, resulting in large jumping of the saw blade during rotation operation. Especially when the saw blade is at a high rotation speed or the diameter of the saw blade is large, the saw blade jumping is very obvious. The vibration of the machine is obvious during operation, affecting cutting and the user experience is not good. Therefore, it is necessary to design a locking device for a saw blade to overcome the above difficulties. Summary of the Invention

[0003] In view of the problems existing in the prior art, the utility model designs a locking device for a saw blade. The utility model directly positions the saw blade by setting a flange surface on the output shaft, limits the saw blade at the other end through a pressing plate, and fixes it through a locking member, so that the locking effect of the saw blade is better and the work is more stable and reliable.

[0004] The invention object of the utility model is realized through the following technical solutions: A locking device for a saw blade, including a placement base and a frame body. The placement base is provided with the frame body. The frame body is internally provided with an output shaft rotatably connected thereto. A gear synchronously rotating with the output shaft is arranged on the output shaft. When the motor in the frame body works, it drives the gear to rotate. A flange surface is arranged at the end of the output shaft facing away from the gear, and a saw blade body synchronously rotating with the output shaft is arranged on the flange surface. A pressing plate is arranged at the end of the saw blade body facing away from the gear. A locking member for fixing the two is arranged between the output shaft and the saw blade body.

[0005] Preferably, a front cover body fixedly connected thereto is arranged at the open end of the frame body. One end of the output shaft is installed on the frame body through a bearing, and the other end of the output shaft is installed on the front cover body through a bearing. The end of the output shaft installed on the front cover body penetrates out of the front cover body. By setting the front cover body, it is convenient to assemble the output shaft. First, install the bearings in the frame body and the front cover body, then install the two ends of the output shaft on the bearings respectively, and then fix the front cover body and the frame body. The structure is simple and the disassembly and assembly are convenient.

[0006] Preferably, an annular groove is arranged in the front cover body, and a first circlip is arranged in the annular groove. The first circlip is arranged in a fitting manner with the bearing in the front cover body. By setting the first circlip, the bearing is limited and installed in the front cover body to prevent the bearing from detaching from the front cover body.

[0007] Preferably, a columnar protrusion is provided at the end of the front cover facing the saw blade body, and a spacer sleeve is sleeved on the columnar protrusion; the bottom of the spacer sleeve abuts against the step of the front cover, and the outer contour of the spacer sleeve matches the outer contour of the columnar protrusion. By installing the spacer sleeve on the outer layer of the front cover, it is convenient to install the movable cover on the outer layer of the spacer sleeve.

[0008] Preferably, a movable cover is sleeved on the outer layer of the spacer sleeve, and the movable cover is rotatably connected to the spacer sleeve; a first clamping groove is provided at the end of the columnar protrusion, and a second clamping spring for limiting the movable cover is provided in the first clamping groove. By providing the second clamping spring, the movable cover is prevented from detaching from the front cover. The movable cover is sleeved on the spacer sleeve, and the body of the movable cover is arranged outside the saw blade body; when not cutting, the movable cover is outside the saw blade body, thus preventing the saw blade body from accidentally injuring the operator. During use, rotate the movable cover; a limiting rotary handle rotatably connected to the surface of the movable cover is provided, and a tension spring for resetting is provided between the movable cover and the inner wall of the frame body; rotate the movable cover to make it away from the cutting end of the saw blade body, and then rotate the limiting rotary handle to make the protrusion on the limiting rotary handle catch on the outer wall of the frame body. At this time, the movable cover can be stably in the unlocked state and cannot rotate, and the tension spring is in a stretched state after the movable cover rotates; when cutting is not required, rotate the limiting rotary handle, and the movable cover will lose its limit, so the movable cover automatically resets to the initial locked state under the action of the tension spring, thus protecting the cutting teeth of the saw blade body.

[0009] Preferably, the flange surface is in a disc shape, and when the saw blade body is sleeved on the output shaft, the saw blade body abuts against the flange surface; a limiting protrusion is provided on the flange surface, and a limiting through hole is provided on the pressing plate; the limiting protrusion is arranged in the limiting through hole, and the outer contour of the limiting protrusion matches the outer contour of the limiting through hole. By providing the limiting protrusion, it is convenient to install the saw blade body and the pressing plate; by providing the flange surface, the saw blade body and the output shaft are more closely attached, so that the saw blade body rotates more stably and does not jump.

[0010] Preferably, an annular sunken groove is provided on the pressing plate, and a threaded hole for installing a locking member is provided in the limiting protrusion; the end face of the locking member is arranged in the annular sunken groove. By providing the annular sunken groove, the pressing plate and the locking member are more closely attached.

[0011] Preferably, both ends of the placement base are respectively provided with a first bracket and a first angle adjuster rotatably connected thereto, and a first locking assembly for locking the two is provided between the first angle adjuster and the frame body; the end of the frame body away from the first angle adjuster is hinged to the first bracket, and a second angle adjuster fixedly connected thereto is provided on the placement base, and a second locking assembly for locking the two is provided between the second angle adjuster and the first bracket; the first angle adjuster and the second angle adjuster are arranged perpendicular to each other.

[0012] By providing the first angle adjuster, it is convenient to adjust the vertical height of the saw blade body and the placement base, so as to adjust the cutting depth during sawing. By providing the second angle adjuster, it is convenient to adjust the inclination angle of the saw blade body and the placement base, so as to conveniently adjust the cutting-in angle during sawing.

[0013] Preferably, the first angle adjuster is provided with a first arc-shaped through hole, and the first locking assembly includes a first knob and a first screw; the first screw is inserted into the first arc-shaped through hole, and the first knob is inserted into the frame body and threadedly connected to the first screw; the second angle adjuster is provided with a second arc-shaped through hole, and the second locking assembly includes a second knob and a second screw; the second screw is inserted into the second arc-shaped through hole, and the second knob is arranged at the end of the second angle adjuster facing away from the second screw, and the second knob is threadedly connected to the second screw.

[0014] When it is necessary to adjust the cutting depth of the saw blade body, the first knob needs to be rotated to unlock, and then the frame body is rotated; when the vertical height of the saw blade body and the placement base is adjusted, it is locked by rotating the first knob. When it is necessary to adjust the cutting-in angle of the saw blade body, the second knob needs to be rotated to unlock, and then the frame body is rotated; when the inclination angle of the saw blade body and the placement base is adjusted, it is locked by rotating the second knob. By providing the first angle adjuster and the second angle adjuster, it is convenient to adjust the cutting position of the saw blade body, and the versatility is better.

[0015] Compared with the prior art, the utility model has the following beneficial effects: 1. The utility model is provided with a flange surface on the output shaft, the flange surface is attached to the saw blade body, the other end through hole of the saw blade body is pressed by a pressing plate, and the saw blade body and the output shaft are fixed by a locking member, with a simple and reliable structure and convenient installation. 2. During assembly, the inner bottom surface of the saw blade body closely adheres to the flange surface, and then after being locked by the pressing plate, the runout of the saw blade body relative to the axis line will also be very small; during rotation, the runout of the saw blade body is much smaller than that of the traditional structure, and the improvement of high rotational speed and large saw blade is very obvious. 3. By providing the first angle adjuster and the second angle adjuster, it is convenient to adjust the cutting position of the saw blade body, and the versatility is better. Brief Description of the Drawings

[0016] Figure 1 is a perspective view of the present utility model;

[0017] Figure 2 is an internal structure diagram of the present utility model;

[0018] Figure 3 is Figure 2 a partial enlarged view of position A in

[0019] Figure 4 is an exploded view of the present utility model with the placement base and the frame body hidden;

[0020] Figure 5 is a perspective view of the frame body;

[0021] Figure 6 is a perspective view of another angle of the present utility model;

[0022] Figure 7 is a perspective view of the present utility model seen from the back to the front;

[0023] Figure 8 is a perspective view when the placement base and the frame body are assembled;

[0024] Figure 9 is an exploded view of the present utility model;

[0025] Markings in the figure: 1. Placement base; 2. Frame body; 3. Output shaft; 4. Gear; 5. Flange surface; 6. Saw blade body; 7. Pressure plate; 8. Locking part; 9. Front cover body; 10. Annular groove; 11. First circlip; 12. Columnar protrusion; 13. Sleeve; 14. Movable cover; 15. First card slot; 16. Second circlip; 17. Limit protrusion; 18. Limit through hole; 19. Annular sinking groove; 20. Threaded hole; 21. First bracket; 22. First angle adjusting part; 23. First locking assembly; 231. First knob; 232. First screw; 24. Second angle adjusting part; 25. Second locking assembly; 251. Second knob; 252. Second screw; 26. First arc-shaped through hole; 27. Second arc-shaped through hole; 28. Limit turning handle; 29. Tension spring; 30. Shaft mounting hole. Detailed implementation manners

[0026] The following further describes the present utility model in combination with the embodiments shown in the drawings:

[0027] Such as Figures 1 to 9As shown in the figure, this embodiment discloses a locking device for a saw blade, which includes a placement base 1 and a frame body 2. The frame body 2 is provided on the placement base 1. An output shaft 3 rotatably connected thereto is provided inside the frame body 2. A gear 4 synchronously rotating with the output shaft 3 is provided on the output shaft 3. When the motor inside the frame body 2 operates, it drives the gear 4 to rotate. At the end of the output shaft 3 facing away from the gear 4, there is a flange surface 5. A saw blade body 6 synchronously rotating with the output shaft 3 is provided on the flange surface 5. At the end of the saw blade body 6 facing away from the gear 4, there is a pressing plate 7. A locking member 8 for fixing the two is provided between the output shaft 3 and the saw blade body 6.

[0028] At the open end of the frame body 2, there is a front cover 9 fixedly connected thereto. One end of the output shaft 3 is installed on the frame body 2 through a bearing, and the other end of the output shaft 3 is installed on the front cover 9 through a bearing. The end of the output shaft 3 installed on the front cover 9 passes through the front cover 9. An annular groove 10 is provided inside the front cover 9, and a first snap ring 11 is provided in the annular groove 10. The first snap ring 11 is arranged in contact with the bearing inside the front cover 9. At the end of the front cover 9 facing the saw blade body 6, there is a columnar protrusion 12. A spacer sleeve 13 is sleeved and installed on the columnar protrusion 12. The bottom of the spacer sleeve 13 abuts against the step of the front cover 9, and the outer contour of the spacer sleeve 13 and the outer contour of the columnar protrusion 12 match each other. An activity cover 14 is sleeved and installed on the outer layer of the spacer sleeve 13. The activity cover 14 is rotatably connected to the spacer sleeve 13. A first card slot 15 is provided at the end of the columnar protrusion 12, and a second snap ring 16 for limiting the activity cover 14 is provided in the first card slot 15.

[0029] The flange surface 5 is in a disc shape. When the saw blade body 6 is sleeved and installed on the output shaft 3, the saw blade body 6 abuts against the flange surface 5. A limiting protrusion 17 is provided on the flange surface 5, and a limiting through hole 18 is provided on the pressing plate 7. The limiting protrusion 17 is arranged in the limiting through hole 18, and the outer contour of the limiting protrusion 17 and the outer contour of the limiting through hole 18 match each other. An annular sunken groove 19 is provided on the pressing plate 7. A threaded hole 20 for installing the locking member 8 is provided in the limiting protrusion 17. The end face of the locking member 8 is arranged in the annular sunken groove 19.

[0030] Both ends of the placement base 1 are respectively provided with a first bracket 21 and a first angle adjuster 22 that are rotatably connected thereto. A first locking assembly 23 for locking the two is provided between the first angle adjuster 22 and the frame body 2; the end of the frame body 2 away from the first angle adjuster 22 is hinged to the first bracket 21. A second angle adjuster 24 fixedly connected thereto is provided on the placement base 1. A second locking assembly 25 for locking the two is provided between the second angle adjuster 24 and the first bracket 21; the first angle adjuster 22 and the second angle adjuster 24 are perpendicularly arranged. A first arc-shaped through hole 26 is provided on the first angle adjuster 22. The first locking assembly 23 includes a first knob 231 and a first screw 232; the first screw 232 is inserted into the first arc-shaped through hole 26, and the first knob 231 is inserted into the frame body 2 and threadedly connected to the first screw 232; a second arc-shaped through hole 27 is provided on the second angle adjuster 24. The second locking assembly 25 includes a second knob 251 and a second screw 252; the second screw 252 is inserted into the second arc-shaped through hole 27, and the second knob 251 is arranged at the end of the second angle adjuster 24 facing away from the second screw 252, and the second knob 251 is threadedly connected to the second screw 252.

[0031] The specific operation process of this embodiment is as follows. By default, the movable cover 14 is in a locked state; the movable cover 14 is sleeved and installed on the spacer sleeve 13, and the body of the movable cover 14 is arranged outside the saw blade body 6; when not cutting, the movable cover 14 is outside the saw blade body 6, thus preventing the saw blade body 6 from accidentally injuring the operator. During use, rotate the movable cover 14. A limit rotating handle 28 rotatably connected thereto is provided on the surface of the movable cover 14. A tension spring 29 for resetting is provided between the movable cover 14 and the inner wall of the frame body 2; rotate the movable cover 14 to make it away from the cutting end of the saw blade body 6, and then rotate the limit rotating handle 28 so that the protrusion on the limit rotating handle 28 catches on the outer wall of the frame body 2. At this time, the movable cover 14 can be stably in an unlocked state and cannot rotate. After the movable cover 14 rotates, the tension spring 29 is in a stretched state; when cutting is not required, rotate the limit rotating handle 28, and the movable cover 14 will lose its limit, so the movable cover 14 automatically resets to the initial locked state under the action of the tension spring 29, thereby protecting the cutting teeth of the saw blade body 6.

[0032] When installing the saw blade body 6, install the saw blade body 6 on the flange surface 5 of the output shaft 3, and then install the pressing plate 7 at the end of the saw blade body 6 facing away from the flange surface 5, so that the pressing plate 7 is stuck on the limit protrusion 17 of the output shaft 3. Finally, thread-connect the output shaft 3 with the locking member 8 to lock the saw blade body 6. A motor is provided inside the frame body 2 (not shown in the drawing); a shaft mounting hole 30 is also provided inside the frame body 2, and a worm is provided inside the shaft mounting hole 30 (not shown in the drawing); the worm and the motor rotate synchronously, and the worm meshes with the gear 4. Then, when the motor rotates, it will drive the gear 4 to rotate, and after the gear 4 rotates, it can drive the saw blade body 6 to rotate.

[0033] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A locking device for a saw blade, comprising a placement base (1) and a frame body (2), wherein the placement base (1) is provided with the frame body (2), characterized in that: An output shaft (3) rotatably connected to the frame body (2) is provided inside the frame body (2), and a gear (4) rotating synchronously therewith is provided on the output shaft (3). When the motor in the frame body (2) is in operation, the gear (4) is driven to rotate. A flange surface (5) is provided on the end of the output shaft (3) facing away from the gear (4), and a saw blade body (6) rotating synchronously with the output shaft (3) is provided on the flange surface (5). A pressure plate (7) is provided on the end of the saw blade body (6) facing away from the gear (4), and a locking member (8) is provided between the output shaft (3) and the saw blade body (6) for fixing the two.

2. The locking device for a saw blade according to claim 1, characterized in that: The open end of the frame body (2) is provided with a front cover body (9) fixedly connected thereto; one end of the output shaft (3) is mounted on the frame body (2) via a bearing, and the other end of the output shaft (3) is mounted on the front cover body (9) via a bearing; the end of the output shaft (3) mounted on the front cover body (9) passes through the front cover body (9).

3. The locking device for a saw blade according to claim 2, characterized in that: An annular groove (10) is provided in the front cover body (9), a first retaining spring (11) is provided in the annular groove (10), and the first retaining spring (11) is arranged to fit the bearing in the front cover body (9).

4. The locking device for a saw blade according to claim 2, characterized in that: The end of the front cover (9) facing the saw blade body (6) is provided with a columnar protrusion (12), and a spacer sleeve (13) is mounted on the columnar protrusion (12); the bottom of the spacer sleeve (13) abuts against the step of the front cover (9), and the outer contour of the spacer sleeve (13) matches the outer contour of the columnar protrusion (12).

5. The locking device for a saw blade according to claim 4, characterized in that: The outer layer of the spacer sleeve (13) is sleeved with a movable cover (14), and the movable cover (14) and the spacer sleeve (13) are rotatably connected; a first clamping groove (15) is provided at the end of the columnar protrusion (12), and a second clamping spring (16) for limiting the movable cover (14) is provided in the first clamping groove (15).

6. The locking device for a saw blade according to claim 1, characterized in that: The flange surface (5) is in the shape of a disk, and when the saw blade body (6) is sleeved and mounted on the output shaft (3), the saw blade body (6) fits against the flange surface (5); a limiting protrusion (17) is provided on the flange surface (5), and a limiting through hole (18) is provided on the pressure plate (7); the limiting protrusion (17) is arranged in the limiting through hole (18), and the outer contour of the limiting protrusion (17) and the outer contour of the limiting through hole (18) match each other.

7. The locking device for a saw blade according to claim 6, characterized in that: The pressing plate (7) is provided with an annular sunken groove (19), and the limiting protrusion (17) is provided with a threaded hole (20) for installing a locking member (8); the end surface of the locking member (8) is arranged in the annular sunken groove (19).

8. The locking device for a saw blade according to claim 1, characterized in that: The two ends of the placement base (1) are respectively provided with a first bracket (21) and a first angle adjustment member (22) rotatably connected thereto, and a first locking assembly (23) for locking the first angle adjustment member (22) and the frame body (2) is provided between the first angle adjustment member (22) and the frame body (2); the end of the frame body (2) away from the first angle adjustment member (22) is hinged to the first bracket (21), and a second angle adjustment member (24) fixedly connected thereto is provided on the placement base (1), and a second locking assembly (25) for locking the second angle adjustment member (24) and the first bracket (21) is provided between the second angle adjustment member (24) and the first bracket (21); the first angle adjustment member (22) and the second angle adjustment member (24) are arranged perpendicular to each other.

9. The locking device for a saw blade according to claim 8, characterized in that: The first angle adjustment member (22) is provided with a first arc-shaped through hole (26), and the first locking assembly (23) comprises a first knob (231) and a first screw (232); the first screw (232) is inserted into the first arc-shaped through hole (26), and the first knob (231) is inserted into the frame body (2) and is threadedly connected to the first screw (232); the second angle adjustment member (24) is provided with a second arc-shaped through hole (27), and the second locking assembly (25) comprises a second knob (251) and a second screw (252); the second screw (252) is inserted into the second arc-shaped through hole (27), the second knob (251) is arranged at the end of the second angle adjustment member (24) facing away from the second screw (252), and the second knob (251) and the second screw (252) are threadedly connected.

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