Handheld girdling saw

Abstract

The utility model discloses a handheld girdling saw, and relates to the field of cutting machines, the handheld girdling saw comprises a case, a power assembly, a blade, a protection assembly and an abutting assembly, during cutting, an abutting plate is extruded to drive a torsional spring to twist, after the torsional spring is twisted to a proper angle, a pressing block is pressed to enable an inserting block to lose limitation of the pressing block, and therefore under the action of two vertical springs, the cutting edge of the blade is cut; according to the cutting machine, the first bevel gear and the second bevel gear are meshed in a transmission mode, and the first bevel gear and the second bevel gear are meshed in a transmission mode to drive the driving shaft to rotate, so that the cutting machine can be stably placed on the surface of a workpiece, the stability of the cutting machine in the cutting process is improved, and the auxiliary supporting capacity is provided; the driving shaft drives the transmission gear through the driving gear, the transmission gear drives the driven gear, the rotating shaft drives the driving clamping block to rotate, the blade is driven by the driving clamping block to rotate, and therefore rotary cutting of the blade is achieved, and transmission is stable.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting machines, in particular to a handheld circular cutting saw. Background Art

[0002] With the development of modern mechanical processing industry, the requirements for cutting quality and precision are constantly increasing. The requirements for improving production efficiency, reducing production costs, and having highly intelligent automatic cutting functions are also increasing. Cutting machines are divided into knife cutting machines, flame cutting machines, plasma cutting machines, laser cutting machines, water cutting machines, etc.

[0003] Taking the knife cutting machine as an example, the motor inside the cutting machine chassis drives the blade to rotate at high speed, and the workpiece is cut through the sharp part or sharp notch on the outer surface of the blade. Before using the cutting machine, it is necessary to select the blade according to the material and thickness of the workpiece to be cut, and then install the appropriate blade on the cutting machine before cutting.

[0004] When cutting, the existing handheld knife cutting machine needs to control the distance between the blade and the object to be cut, which requires the worker's arm strength to be strong and stable enough to maintain stable cutting of the cutting machine. However, the existing cutting machine does not have the function of auxiliary support. When workers use the cutting machine, it is difficult to operate and it is more laborious to use. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the above problems existing in the prior art, the utility model provides a handheld circular cutting saw.

[0007] (II) Technical solution

[0008] To achieve the above purpose, the utility model is implemented by the following technical solutions: a handheld circular saw, comprising a chassis, a power assembly is arranged inside the chassis, a blade is connected to one side of the power assembly in a transmission manner, a protective assembly is arranged on the outer surface of the chassis, an abutment assembly is arranged on the outer surface of the chassis, and a clamping component for clamping the blade is arranged inside the chassis;

[0009] A power assembly comprises a driving shaft movably connected inside the chassis, a driving gear is fixedly connected to the outer surface of the driving shaft, a transmission gear is meshedly connected to the outer surface of the driving gear, a driven gear is meshedly connected to the outer surface of the transmission gear, a rotating shaft is inserted inside the driven gear, and a driving clamping block is fixedly connected to one end of the rotating shaft away from the driven gear;

[0010] The abutting component includes a connecting block hinged to the outer surface of the chassis by a pin. One side of the connecting block away from the chassis is fixedly connected with an abutting plate. A torsion spring is arranged inside the connecting block. A pressing block is inserted into the interior of the chassis. An inserting block is inserted into the pressing block. A connecting plate is fixedly connected to the outer surface of the inserting block. Two vertical springs are fixedly connected to the upper surface of the connecting plate. One end of the vertical spring away from the connecting plate is fixedly connected to the interior of the chassis. One end of the pressing block close to the interior of the chassis is fixedly connected with a transverse spring. One end of the transverse spring away from the pressing block is fixedly connected to the inner wall of the chassis.

[0011] As a preferred scheme of the hand-held circular saw described in the present utility model, a motor is fixedly connected to the interior of the chassis. The output end of the motor is fixedly connected with a second bevel gear. The outer surface of the second bevel gear is meshed with a first bevel gear. The interior of the first bevel gear is fixedly connected to the outer surface of the driving shaft. A clamping groove is arranged on the outer surface of the driving clamping block.

[0012] As a preferred scheme of the hand-held circular saw described in the present utility model, the protection component includes a protection cover hinged to the outer surface of the chassis. Two clamping blocks are fixedly connected to the inner wall of the protection cover. A stretching spring is fixedly connected to the outer surface of the protection cover.

[0013] As a preferred scheme of the hand-held circular saw described in the present utility model, a threaded knob is threadedly connected to the interior of the chassis. One end of the threaded knob close to the interior of the chassis abuts against the outer surface of the clamping component.

[0014] As a preferred scheme of the hand-held circular saw described in the present utility model, a card slot matching with the protection cover is arranged on the outer surface of the chassis. Two pulleys are movably connected to the outer surface of the protection cover.

[0015] As a preferred scheme of the hand-held circular saw described in the present utility model, a hook is arranged at one end of the stretching spring away from the protection cover. A connection hole matching with the hook is arranged on the outer surface of the chassis.

[0016] As a preferred scheme of the hand-held circular saw described in the present utility model, a rectangular hole matching with the inserting block is arranged on the outer surface of the connecting block. A rectangular through groove with the same width as the inserting block is arranged inside the pressing block. A protrusion matching with the pressing block is arranged on the outer surface of the inserting block. A bevel surface is arranged on the outer surface of the inserting block.

[0017] As a preferred scheme of the hand-held circular saw described in the present utility model, a limiting plate is fixedly connected to the lower surface of the connecting block. A rectangular opening for the movement of the limiting plate is arranged on the outer surface of the chassis.

[0018] (III) Beneficial effects

[0019] The utility model provides a handheld circular cutting saw, which has the following beneficial effects:

[0020] 1. During cutting, the pressing contact plate is squeezed, so as to drive the torsion spring to twist. After twisting to a suitable angle, the pressing block is pressed, so that the inserting block loses the limit of the pressing block. Then, under the action of two vertical springs, it extends downward out of the chassis, and then inserts into the rectangular opening arranged on the outer surface of the connecting block, so as to fix the pressing contact plate, enabling the cutting machine to be stably placed on the surface of the workpiece, improving the stability of the cutting machine during the cutting process, and providing auxiliary support ability.

[0021] 2. The motor drives the drive shaft to rotate through the meshing transmission of the second bevel gear and the first bevel gear. The drive shaft drives the transmission gear through the drive gear. The transmission gear drives the driven gear, and the rotating shaft drives the driving clamping block to rotate. The driving clamping block drives the blade to rotate, so as to realize the rotating cutting of the blade, and the transmission is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic structural diagram of the whole of the present utility model.

[0024] Figure 2 It is a schematic internal structure diagram of the chassis of the present utility model.

[0025] Figure 3 It is the present utility model Figure 2 The enlarged structural diagram of A in it.

[0026] Figure 4 It is a schematic structural diagram of the driving clamping block of the present utility model.

[0027] Figure 5 It is a schematic sectional structural diagram of the threaded knob of the present utility model.

[0028] Figure 6 It is a schematic structural diagram of the protection component of the present utility model.

[0029] Figure 7 It is an exploded structural diagram of the contact component of the present utility model.

[0030] Figure 8It is a schematic cross-sectional structure diagram of the abutting component of the present utility model.

[0031] In the figure, 1 is a blade; 2 is an abutting component; 201 is an abutting plate; 202 is a connecting block; 203 is a pressing block; 204 is a plugging block; 205 is a transverse spring; 206 is a vertical spring; 207 is a limiting plate; 208 is a connecting plate; 3 is a chassis; 4 is a protective component; 401 is a pulley; 402 is a clamping block; 403 is a protective cover; 404 is a tension spring; 5 is a power component; 501 is a driven gear; 502 is a transmission gear; 503 is a driving gear; 504 is a first bevel gear; 505 is a second bevel gear; 506 is a driving shaft; 507 is a driving clamping block; 508 is a rotating shaft; 6 is a threaded knob. Specific implementation manners

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0033] Embodiment 1

[0034] Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 And Figure 6 , which is the first embodiment of the present utility model. This embodiment provides a hand-held circular saw, including a chassis 3. A power component 5 is arranged inside the chassis 3. One side of the power component 5 is drivingly connected to a blade 1. A protective component 4 is arranged on the outer surface of the chassis 3. An abutting component 2 is arranged on the outer surface of the chassis 3. A clamping part for clamping the blade 1 is arranged inside the chassis 3. The power component 5 includes a driving shaft 506 movably connected inside the chassis 3. A driving gear 503 is fixedly connected to the outer surface of the driving shaft 506. A transmission gear 502 is meshingly connected to the outer surface of the driving gear 503. A driven gear 501 is meshingly connected to the outer surface of the transmission gear 502. A rotating shaft 508 is inserted inside the driven gear 501. One end of the rotating shaft 508 away from the driven gear 501 is fixedly connected to a driving clamping block 507.

[0035] Specifically, a motor is fixedly connected inside the chassis 3. The output end of the motor is fixedly connected with a second bevel gear 505. The outer surface of the second bevel gear 505 is meshed with a first bevel gear 504. The inside of the first bevel gear 504 is fixedly connected with the outer surface of a drive shaft 506. A clamping groove is arranged on the outer surface of the drive clamping block 507. The protection component 4 includes a protection cover 403 hinged on the outer surface of the chassis 3. Two clamping blocks 402 are fixedly connected to the inner wall of the protection cover 403. A tension spring 404 is fixedly connected to the outer surface of the protection cover 403. A threaded knob is threadedly connected inside the chassis 3. One end of the threaded knob close to the inside of the chassis 3 abuts against the outer surface of the clamping component. A clamping groove matching with the protection cover 403 is arranged on the outer surface of the chassis 3. Two pulleys 401 are movably connected to the outer surface of the protection cover 403. A hook is arranged at one end of the tension spring 404 away from the protection cover 403. A connection hole matching with the hook is arranged on the outer surface of the chassis 3.

[0036] Further, through the meshing transmission of the second bevel gear 505 and the first bevel gear 504 by the motor, the drive shaft 506 is driven to rotate. The drive shaft 506 drives the transmission gear 502 through the drive gear 503. The transmission gear 502 drives the driven gear 501 and the rotating shaft 508 to drive the drive clamping block 507 to rotate. The blade 1 is driven to rotate through the clamping groove arranged on the outer surface of the drive clamping block 507. The two sides of the blade 1 are clamped by the clamping blocks 402 fixedly connected to the inner wall of the protection cover 403 to prevent the blade 1 from shaking. A clamping component is arranged inside the chassis 3. By screwing the threaded knob 6 on the outer surface of the chassis 3, the threaded knob 6 is driven to penetrate into the chassis, thereby driving the clamping component to gradually approach the outer surface of the blade 1, so as to realize the fine adjustment of the left and right positions of the blade 1. The connection relationship, working principle and working process between the clamping component and other components belong to the prior art and are common knowledge well known to those skilled in the art, so no more details will be described here.

[0037] Embodiment 2

[0038] Refer to Figure 1 、 Figure 7 And Figure 8, which is the second embodiment of the present utility model. This embodiment is based on the previous embodiment. The abutting component 2 includes a connecting block 202 hinged to the outer surface of the chassis 3 by a bolt. One side of the connecting block 202 away from the chassis 3 is fixedly connected with an abutting plate 201. A torsion spring is arranged inside the connecting block 202. A pressing block 203 is inserted through the inside of the chassis 3. An inserting block 204 is inserted through the inside of the pressing block 203. A connecting plate 208 is fixedly connected to the outer surface of the inserting block 204. Two vertical springs 206 are fixedly connected to the upper surface of the connecting plate 208. One end of the vertical spring 206 away from the connecting plate 208 is fixedly connected to the inside of the chassis 3. One end of a transverse spring 205 close to the inside of the chassis 3 is fixedly connected to the pressing block 203. One end of the transverse spring 205 away from the pressing block 203 is fixedly connected to the inner wall of the chassis 3.

[0039] Specifically, a rectangular hole matching the inserting block 204 is arranged on the outer surface of the connecting block 202. A rectangular through groove with the same width as the inserting block 204 is arranged inside the pressing block 203. A protrusion matching the pressing block 203 is arranged on the outer surface of the inserting block 204. An inclined surface is arranged on the outer surface of the inserting block 204. A limiting plate 207 is fixedly connected to the lower surface of the connecting block 202. A rectangular opening for the movement of the limiting plate 207 is arranged on the outer surface of the chassis 3.

[0040] Furthermore, by squeezing the abutting plate 201, the torsion spring is driven to twist. After twisting to an appropriate angle, the pressing block 203 is pressed, so that the inserting block 204 loses the limitation of the pressing block 203. Then, under the action of the two vertical springs 206, it extends downward out of the chassis 3 and inserts into the rectangular opening arranged on the outer surface of the connecting block 202, thereby fixing the abutting plate 201 and enabling the cutting machine to be stably placed on the surface of the workpiece. When resetting is required, the limiting plate 207 is pressed, so that the limiting plate 207 drives the inserting block 204 to retract into the inside of the chassis 3 through the connecting plate 208. The inserting block 204 drives the pressing block 203 to move through the inclined surface on the outer surface, so that the inserting block 204 passes through the rectangular through groove arranged inside the pressing block 203. The inserting block 204 is fixed by the cooperation of the protrusion on the outer surface and the pressing block 203. The connecting block 202 drives the abutting plate 201 to reset under the action of the internal torsion spring.

[0041] Working principle: When using a handheld cutting machine, the motor drives the drive shaft 506 to rotate through the meshing transmission of the second bevel gear 505 and the first bevel gear 504. The drive shaft 506 drives the transmission gear 502 through the drive gear 503. The transmission gear 502 drives the driven gear 501 and the rotating shaft 508 to drive the driving clamping block 507 to rotate. The blade 1 is driven to rotate through the clamping groove arranged on the outer surface of the driving clamping block 507, thereby realizing the stable rotation of the blade 1. The two sides of the blade 1 are clamped by the clamping block 402 fixedly connected to the inner wall of the protective cover 403 to prevent the blade 1 from shaking. Rotate the protective cover 403 so that the protective cover 403 is matched with the card slot on the outer surface of the machine case 3, and pull the hook of the tension spring 404 to be matched with the connection hole on the outer surface of the machine case 3, thereby fixing the protective cover 403 and preventing the protective cover 403 from flipping open. Then place the cutting machine on the surface of the workpiece to be cut. By pressing the abutting plate 201, the torsion spring is driven to twist. After twisting to an appropriate angle, press the pressing block 203 so that the insertion block 204 loses the limit of the pressing block 203, and thus under the action of the two vertical springs 206, it extends downward out of the machine case 3 and inserts into the rectangular opening arranged on the outer surface of the connection block 202, thereby fixing the abutting plate 201 and enabling the cutting machine to be stably placed on the workpiece surface. When necessary, the cutting machine can also be rotated so that the protective cover 403 drives the tension spring 404 to stretch, and thus is supported by the pulleys 401 at both ends of the connecting shaft 410, thereby facilitating the cutting at a converted angle. Hold the machine case 3 to drive the blade 1 to cut, and finally realize the cutting process.

[0042] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

Claims

1. A handheld circular saw, comprising a chassis (3), characterized in that: Inside the chassis (3), a power component (5) is provided. One side of the power component (5) is drivingly connected to a blade (1). On the outer surface of the chassis (3), a protection component (4) is provided. On the outer surface of the chassis (3), an abutting component (2) is provided. Inside the chassis (3), a clamping part for clamping the blade is provided; The power component (5) includes a drive shaft (506) movably connected inside the chassis (3). On the outer surface of the drive shaft (506), a drive gear (503) is fixedly connected. On the outer surface of the drive gear (503), a transmission gear (502) is meshingly connected. On the outer surface of the transmission gear (502), a driven gear (501) is meshingly connected. Inside the driven gear (501), a rotating shaft (508) is inserted. One end of the rotating shaft (508) away from the driven gear (501) is fixedly connected to a drive clamping block (507); The abutting component (2) includes a connecting block (202) hinged to the outer surface of the chassis (3) by a pin. On the side of the connecting block (202) away from the chassis (3), an abutting plate (201) is fixedly connected. Inside the connecting block (202), a torsion spring is provided. Inside the chassis (3), a pressing block (203) is inserted. Inside the pressing block (203), a plug-in block (204) is inserted. On the outer surface of the plug-in block (204), a connecting plate (208) is fixedly connected. On the upper surface of the connecting plate (208), two vertical springs (206) are fixedly connected. One end of the vertical spring (206) away from the connecting plate (208) is fixedly connected to the inside of the chassis (3). One end of the pressing block (203) close to the inside of the chassis (3) is fixedly connected to a horizontal spring (205). One end of the horizontal spring (205) away from the pressing block (203) is fixedly connected to the inner wall of the chassis (3).

2. The hand-held circular saw according to claim 1, wherein: Inside the chassis (3), a motor is fixedly connected. The output end of the motor is fixedly connected to a second bevel gear (505). On the outer surface of the second bevel gear (505), a first bevel gear (504) is meshingly connected. Inside the first bevel gear (504), it is fixedly connected to the outer surface of the drive shaft (506). On the outer surface of the drive clamping block (507), a clamping groove is provided.

3. The hand-held circular saw according to claim 2, wherein: The protection component (4) includes a protection cover (403) hinged to the outer surface of the chassis (3). On the inner wall of the protection cover (403), two clamping blocks (402) are fixedly connected. On the outer surface of the protection cover (403), a tension spring (404) is fixedly connected.

4. The hand-held circular saw according to claim 3, characterized in that: Inside the chassis (3), a threaded knob (6) is threadedly connected. One end of the threaded knob (6) close to the inside of the chassis (3) abuts against the outer surface of the clamping part.

5. A hand-held circular saw according to claim 4, wherein: On the outer surface of the chassis (3), a card slot matching the protection cover (403) is provided. On the outer surface of the protection cover (403), two pulleys (401) are movably connected.

6. The hand-held circular cutting saw according to claim 5, wherein: One end of the tension spring (404) away from the protection cover (403) is provided with a hook. On the outer surface of the chassis (3), a connection hole matching the hook is provided.

7. A hand-held circular saw according to claim 6, characterized in that: A rectangular hole matching with the plug block (204) is arranged on the outer surface of the connecting block (202), a rectangular through groove with the same width as the plug block (204) is arranged inside the pressing block (203), a protrusion matching with the pressing block (203) is arranged on the outer surface of the plug block (204), and an inclined surface is arranged on the outer surface of the plug block (204).

8. A hand-held circular saw according to claim 7, wherein: A limiting plate (207) is fixedly connected to the lower surface of the connecting block (202), and a rectangular opening for the movement of the limiting plate (207) is arranged on the outer surface of the chassis (3).

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