Handheld girdling saw convenient for damping

Abstract

The utility model discloses a handheld girdling saw facilitating damping, and relates to the field of cutting equipment, the handheld girdling saw comprises a power case, a transmission case, a fixing piece, a transmission clamping block, a blade, a buffer assembly and a limiting assembly, the blade is matched with the outer surface of an abutting block, and when the blade is used for cutting, the limiting assembly is arranged on the outer surface of the abutting block; when the electric circular saw is in contact with a cut workpiece, impact force generated when the electric circular saw is in contact with the cut workpiece is transmitted to a connecting block through an abutting block and a fixing block, and the connecting block drives a transmission block to extrude a buffer spring, so that the impact force is buffered by the buffer spring, and a worker can conveniently control the electric circular saw; and when one end of the threaded rod extends into the transmission case, the end of the threaded rod abuts against the outer surface of a rotating block, so that the rotating block is driven to rotate on the outer surface of a fixed shaft, the rotating block drives an extrusion block to extrude the side face of a blade, and therefore one side of the blade is limited, and the blade is prevented from shaking.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting equipment, in particular to a hand-held circular saw convenient for shock absorption. Background Technique

[0002] A circular saw is a tool powered by a single-phase series-wound motor and drives a circular saw blade to perform sawing operations through a transmission mechanism. It has the characteristics of safety, reliability, and high working efficiency. The circular saw adopts a carrying handle shape structure and mainly consists of a motor, a reduction box, a protective cover, an adjustment mechanism, a base plate, a handle, a switch, a non-reconnectable plug, a circular saw blade, etc.

[0003] When the circular saw is in use, the motor inside the machine case needs to be started first. The motor drives the rotating block to rotate through the transmission mechanism, and drives the blade to rotate through the rotating block to realize the cutting work of the blade. And before the cutting work is carried out, the blade needs to idle for a period of time to observe whether the blade is running normally. Only when the blade is normal can the cutting work be carried out.

[0004] When using the blade, both hands need to hold the handle on the machine case, and then the blade can be brought into contact with the workpiece to be cut. When the rotating blade contacts the workpiece to be cut and during the subsequent cutting work, a large impact force will be generated. However, the existing circular saw lacks a buffer component inside, which results in the impact force only being able to be controlled by the worker holding it with both hands, making it more troublesome to use. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] In view of the above problems existing in the prior art, the utility model provides a hand-held circular saw convenient for shock absorption.

[0007] (2) Technical Solutions

[0008] To achieve the above object, the utility model is realized through the following technical solutions: A hand-held circular saw convenient for shock absorption, including a power machine case, one end of the power machine case is provided with a transmission machine case, the outer surface of the transmission machine case is fixedly connected with a fixing piece, the fixing piece is movably connected with a transmission clamping block, the outer surface of the transmission clamping block is movably connected with a blade, two buffer components are arranged inside the transmission machine case, and two limiting components are arranged inside the transmission machine case;

[0009] The buffer assembly includes a fixed cylinder movably connected to the inner wall of the drive chassis. One end of the fixed cylinder close to the blade is movably connected with an abutting block. A fixed block is movably connected inside the abutting block. One end of the fixed block away from the blade is fixedly connected with a connecting block. One end of the connecting block away from the fixed block is fixedly connected with a transmission block. A buffer spring abuts against the outer surface of the transmission block. One end of the buffer spring away from the transmission block is fixedly connected with an extension rod. One end of the extension rod away from the buffer spring is movably connected with an internally threaded block;

[0010] The limiting assembly includes a fixed shaft movably connected inside the drive chassis. A rotating block is movably connected to the outer surface of the fixed guard. An extrusion block is fixedly connected to the outer surface of the rotating block. A threaded connecting rod is threadedly connected inside the extrusion block and the rotating block. A threaded rod is inserted through the drive chassis. One end of the threaded rod away from the rotating block is fixedly connected with a rotating block.

[0011] As a preferred scheme of the portable circular cutting saw that is convenient for shock absorption described in the present invention, there is a motor arranged inside the power chassis, a transmission component is arranged inside the drive chassis, the output end of the motor is in transmission connection with one end of the transmission component, one end of the transmission component away from the motor is fixedly connected to the side surface of the transmission clamping block, a card slot is arranged on the outer surface of the transmission clamping block, and the inner wall of the card slot is closely connected to the inner side wall of the blade.

[0012] As a preferred scheme of the portable circular cutting saw that is convenient for shock absorption described in the present invention, a limiting groove is arranged on the outer surface of the blade, and a protrusion matching the limiting groove is arranged on the outer surface of the abutting block.

[0013] As a preferred scheme of the portable circular cutting saw that is convenient for shock absorption described in the present invention, a limiting protrusion for abutting against the transmission block is arranged on the inner wall of the fixed cylinder, threads are arranged on the outer surface of the fixed cylinder, and the internally threaded block is threadedly connected to the outer surface of the fixed cylinder.

[0014] As a preferred scheme of the portable circular cutting saw that is convenient for shock absorption described in the present invention, a fixed spring is fixedly connected to one side of the rotating block close to the threaded rod, and one end of the fixed spring away from the rotating block is fixedly connected to the outer surface of the drive chassis.

[0015] As a preferred scheme of the portable circular cutting saw that is convenient for shock absorption described in the present invention, a through groove for the threaded connecting rod to move is arranged on the outer surface of the drive chassis, and one end of the threaded connecting rod passes through the extrusion block and the rotating block and slides inside the through groove.

[0016] (III) Beneficial effects

[0017] The utility model provides a hand-held circular cutting saw which is convenient for shock absorption. It has the following beneficial effects:

[0018] 1. The outer surface of the blade is matched with the outer surface of the abutting block. When the blade cuts, the impact force generated when contacting the workpiece to be cut is transmitted to the connecting block through the abutting block and the fixing block. The connecting block drives the transmission block to squeeze the buffer spring, so that the impact force is buffered by the buffer spring, which is convenient for workers to control the electric circular saw.

[0019] 2. By driving the threaded rod to rotate through the rotating block, one end of the threaded rod moves into the transmission gearbox. When one end of the threaded rod extends into the interior of the transmission gearbox, it abuts against the outer surface of the rotating block, thereby driving the rotating block to rotate on the outer surface of the fixed shaft. When the rotating block rotates, it drives the pressing block to press the side of the blade, so that the protrusion on the outer surface of the pressing block is matched with the limiting groove on the outer surface of the blade, thereby realizing the limitation of one side of the blade and preventing the blade from shaking. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description 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.

[0021] Figure 1 It is a schematic structural diagram of the whole of the present utility model.

[0022] Figure 2 It is a schematic structural diagram of the back of the whole of the present utility model.

[0023] Figure 3 It is a schematic cross-sectional structural diagram of the buffer assembly of the present utility model.

[0024] Figure 4 It is an exploded structural diagram of the limiting assembly of the present utility model.

[0025] In the figure, 1. Blade; 2. Fixed piece; 3. Transmission gearbox; 4. Power gearbox; 5. Buffer assembly; 501. Abutting block; 502. Fixing block; 503. Connecting block; 504. Transmission block; 505. Buffer spring; 506. Extension rod; 507. Internal thread block; 508. Fixed cylinder; 6. Limiting assembly; 601. Rotating block; 602. Threaded rod; 603. Fixed spring; 604. Fixed shaft; 605. Rotating block; 606. Threaded connecting rod; 607. Pressing block; 7. Transmission clamping block. Detailed Embodiments

[0026] 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.

[0027] Embodiment 1

[0028] Referring to Figure 1 、 Figure 2 and Figure 3 , this is the first embodiment of the present utility model. This embodiment provides a hand-held circular saw that is convenient for shock absorption, including a power chassis 4. One end of the power chassis 4 is provided with a transmission chassis 3. A fixing piece 2 is fixedly connected to the outer surface of the transmission chassis 3. A transmission clamping block 7 is movably connected to the fixing piece 2. A blade 1 is movably connected to the outer surface of the transmission clamping block 7. Two buffer components 5 are provided inside the transmission chassis 3. Two limiting components 6 are provided inside the transmission chassis 3. The buffer component 5 includes a fixing cylinder 508 movably connected to the inner wall of the transmission chassis 3. One end of the fixing cylinder 508 close to the blade 1 is movably connected to an abutting block 501. A fixing block 502 is movably connected to the inside of the abutting block 501. One end of the fixing block 502 away from the blade 1 is fixedly connected to a connecting block 503. One end of the connecting block 503 away from the fixing block 502 is fixedly connected to a transmission block 504. A buffer spring 505 abuts against the outer surface of the transmission block 504. One end of the buffer spring 505 away from the transmission block 504 is fixedly connected to an extension rod 506. One end of the extension rod 506 away from the buffer spring 505 is movably connected to an internal thread block 507.

[0029] Specifically, a motor is provided inside the power chassis 4, and transmission components are provided inside the transmission chassis 3. The output end of the motor is in transmission connection with one end of the transmission components. The end of the transmission components away from the motor is fixedly connected to the side surface of the transmission clamping block 7. A card slot is provided on the outer surface of the transmission clamping block 7. The inner wall of the card slot is in close connection with the inner side wall of the blade 1. A limiting slot is provided on the outer surface of the blade 1. A protrusion matching the limiting slot is provided on the outer surface of the abutting block 501. A limiting protrusion abutting the transmission block 504 is provided on the inner wall of the fixing cylinder 508. Threads are provided on the outer surface of the fixing cylinder 508. The internal thread block 507 is in threaded connection with the outer surface of the fixing cylinder 508.

[0030] Further, the protrusions on the outer surface of the abutting block 501 are made of a soft material, so as to cooperate with the limiting grooves on the outer surface of the blade 1. Before cutting, by rotating the internal thread block 507 and moving through the threads on the outer surface of the fixed cylinder 508, the extension rod 506 can be driven to move, thereby adjusting the pre-tightening amount of the buffer spring 505 and improving the buffering effect. During cutting, when the blade 1 contacts the workpiece to be cut and generates an impact force, the abutting block 501 is driven to move. The abutting block 501 moves through the fixed block 502 and the connecting block 503, so that the transmission block 504 transmits the impact force to the buffer spring 505, thereby achieving the buffering effect. By turning the threaded knob provided on the outer surface of the drive gearbox 3, the connection relationship, working principle, and working process between the transmission components and other components belong to the prior art and are common knowledge well-known to those skilled in the art, so no further elaboration will be made here.

[0031] Embodiment 2

[0032] Refer to Figure 1 、 Figure 2 And Figure 4 This is the second embodiment of the present invention. Based on the previous embodiment, the limiting component 6 includes a fixed shaft 604 movably connected inside the drive gearbox 3. A rotating block 605 is movably connected to the outer surface of the fixed guard. An extrusion block 607 is fixedly connected to the outer surface of the rotating block 605. A threaded connecting rod 606 is threadedly connected inside the extrusion block 607 and the rotating block 605. A threaded rod 602 is inserted through the drive gearbox 3. One end of the threaded rod 602 away from the rotating block 605 is fixedly connected to a rotating block 601.

[0033] Specifically, a fixed spring 603 is fixedly connected to the side of the rotating block 601 close to the threaded rod 602. One end of the fixed spring 603 away from the rotating block 601 is fixedly connected to the outer surface of the drive gearbox 3. A through groove for the movement of the threaded connecting rod 606 is opened on the outer surface of the drive gearbox 3. One end of the threaded connecting rod 606 passes through the extrusion block 607 and the rotating block 605 and slides inside the through groove.

[0034] Further, by rotating the rotating block 601, the threaded rod 602 is driven to rotate, so that one end of the threaded rod 602 moves towards the inside of the drive gearbox 3. When one end of the threaded rod 602 extends into the inside of the drive gearbox 3, it abuts against the outer surface of the rotating block 605, thereby driving the rotating block 605 to rotate on the outer surface of the fixed shaft 604. When the rotating block 605 rotates, the extrusion block 607 is driven to squeeze the side of the blade 1, so that the protrusions on the outer surface of the extrusion block 607 cooperate with the limiting grooves on the outer surface of the blade 1, thereby achieving the limitation of one side of the blade 1. And when the rotating block 601 rotates, the fixed spring 603 is driven to be compressed, thereby preventing the rotating block 601 from rotating too much and causing the blade 1 to lose balance.

[0035] Working principle: When using a circular saw for cutting, first rotate the rotating block 601, which drives the threaded rod 602 to rotate, causing one end of the threaded rod 602 to move into the transmission case 3. When one end of the threaded rod 602 extends into the interior of the transmission case 3, it abuts against the outer surface of the rotating block 605, thereby driving the rotating block 605 to rotate on the outer surface of the fixed shaft 604. When the rotating block 605 rotates, it drives the pressing block 607 to press against the side of the blade 1, so that the protrusions on the outer surface of the pressing block 607 cooperate with the limiting grooves on the outer surface of the blade 1, thus realizing the limiting of one side of the blade 1. And when the rotating block 601 rotates, it drives the fixed spring 603 to be compressed, thereby preventing the blade 1 from losing balance due to the excessive rotation angle of the rotating block 601. The protrusions on the outer surface of the abutting block 501 limit the limiting grooves on the outer surface of the blade 1. Hold the power case 4 with both hands through the holes on the outer surface of the power case 4. The motor inside the power case 4 is transmitted with the transmission components inside the traditional case, thereby driving the transmission clamping block 7 to rotate. When the transmission clamping block 7 rotates, it drives the blade 1 to rotate through the clamping grooves provided on the outer surface, thereby driving the blade 1 to perform cutting work. When the blade 1 rotates, it drives the abutting block 501 and the pressing block 607 to rotate. When the blade 1 contacts the workpiece to be cut, an impact force is generated, which drives the abutting block 501 to move. The abutting block 501 moves through the fixed block 502 and the connecting block 503, so that the transmission block 504 transmits the impact force to the buffer spring 505, thus realizing the buffering effect. And the pre-tightening amount of the buffer spring 505 can be adjusted by rotating the internal thread block 507 and moving it through the threads on the outer surface of the fixed cylinder 508, thereby driving the extension rod 506 to move, so as to improve the buffering effect and finally complete the cutting work.

[0036] 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 hand-held circular saw facilitating shock absorption, comprising a power chassis (4), characterized in that: One end of the power machine case (4) is provided with a transmission machine case (3). A fixing piece (2) is fixedly connected to the outer surface of the transmission machine case (3). A transmission clamping block (7) is movably connected to the fixing piece (2). A blade (1) is movably connected to the outer surface of the transmission clamping block (7). Two buffer components (5) are arranged inside the transmission machine case (3). Two limiting components (6) are arranged inside the transmission machine case (3). The buffer component (5) includes a fixing cylinder (508) movably connected to the inner wall of the transmission machine case (3). An abutting block (501) is movably connected to one end of the fixing cylinder (508) close to the blade (1). A fixing block (502) is movably connected to the inside of the abutting block (501). A connecting block (503) is fixedly connected to one end of the fixing block (502) away from the blade (1). A transmission block (504) is fixedly connected to one end of the connecting block (503) away from the fixing block (502). A buffer spring (505) abuts against the outer surface of the transmission block (504). One end of the buffer spring (505) away from the transmission block (504) is fixedly connected to an extension rod (506). One end of the extension rod (506) away from the buffer spring (505) is movably connected to an internally threaded block (507). The limiting component (6) includes a fixing shaft (604) movably connected to the inside of the transmission machine case (3). A rotating block (605) is movably connected to the outer surface of the fixing shaft. An extrusion block (607) is fixedly connected to the outer surface of the rotating block (605). A threaded connecting rod (606) is threadedly connected to the inside of the extrusion block (607) and the rotating block (605). A threaded rod (602) is inserted into the inside of the transmission machine case (3). One end of the threaded rod (602) away from the rotating block (605) is fixedly connected to a rotating block (601).

2. The hand-held circular saw according to claim 1, which is easy to shock-absorb, is characterized in that: A motor is arranged inside the power machine case (4). Transmission components are arranged inside the transmission machine case (3). The output end of the motor is in transmission connection with one end of the transmission components. One end of the transmission components away from the motor is fixedly connected to the side surface of the transmission clamping block (7). A clamping groove is arranged on the outer surface of the transmission clamping block (7). The inner wall of the clamping groove is tightly connected to the inner side wall of the blade (1).

3. The hand-held circular saw according to claim 2, which is characterized in that: A limiting groove is arranged on the outer surface of the blade (1). A protrusion matched with the limiting groove is arranged on the outer surface of the abutting block (501).

4. The hand-held circular saw facilitating shock absorption according to claim 3, characterized in that: A limiting protrusion for abutting against the transmission block (504) is arranged on the inner wall of the fixing cylinder (508). Threads are arranged on the outer surface of the fixing cylinder (508). The internally threaded block (507) is threadedly connected to the outer surface of the fixing cylinder (508).

5. The hand-held circular saw according to claim 4, which is characterized in that: A fixing spring (603) is fixedly connected to one side of the rotating block (601) close to the threaded rod (602). One end of the fixing spring (603) away from the rotating block (601) is fixedly connected to the outer surface of the transmission machine case (3).

6. The hand-held circular saw for facilitating shock absorption according to claim 5, wherein: A through groove for the movement of the threaded connecting rod (606) is formed in the outer surface of the transmission gearbox (3), and one end of the threaded connecting rod (606) passes through the extrusion block (607) and the rotating block (605) and slides inside the through groove.

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