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CN-224209203-U - Safety protection mechanism of electric saw

CN224209203UCN 224209203 UCN224209203 UCN 224209203UCN-224209203-U

Abstract

The utility model discloses a safety protection mechanism of an electric saw, which comprises a front protection cover, wherein the front protection cover comprises a first cover body and a second cover body which are arranged in a split mode, the first cover body can swing between a first position and a second position relative to a frame, when the first cover body is positioned at the first position, the first cover body is in limit fit with the second cover body so as to limit the second cover body to swing upwards, and when the first cover body is positioned at the second position, the first cover body is in dislocation fit with the second cover body so as to release limit on the second cover body. When the first cover body is positioned at the second position, the second cover body swings upwards along with the pressing of the frame and covers the outside of the first cover body, so that the front cover has smaller arc length, and the lower end of the front cover body cannot interfere with a workpiece to be cut.

Inventors

  • DUAN BOWEN
  • YAN GUOLIANG

Assignees

  • 宁波协诚电动工具有限公司
  • 宁波卡伦特电器有限公司

Dates

Publication Date
20260508
Application Date
20250526

Claims (10)

  1. 1. The safety protection mechanism of the electric saw comprises a front protection cover and is characterized in that the front protection cover comprises a first cover body (1) and a second cover body (2) which are arranged in a split mode; the upper end of the first cover body (1) is hinged with a frame (101) of the electric saw (100), the first cover body (1) can swing between a first position and a second position relative to the frame (101), an elastic locking mechanism (3) is arranged between the frame (101) and the first cover body (1), and the elastic locking mechanism (3) enables the first cover body (1) to always have a trend of moving towards the first position; The center of the second cover body (2) is hinged with the frame (101), when the frame (101) performs a downward pressing action, the first cover body (1) moves downwards along with the frame (101) synchronously, the second cover body (2) swings upwards relative to the first cover body (1), when the frame (101) performs an upward tilting action, the first cover body (1) moves upwards along with the frame (101) synchronously, and the second cover body (2) swings downwards relative to the first cover body (1); When the first cover body (1) is positioned at the first position, the first cover body (1) is in limit fit with the second cover body (2) to limit the second cover body (2) to swing upwards, and when the first cover body (1) is positioned at the second position, the first cover body (1) is in dislocation fit with the second cover body (2) to release limit of the second cover body (2).
  2. 2. The safety mechanism of claim 1, further comprising a linkage rod (5), wherein one end of the linkage rod (5) is eccentrically hinged to the second cover (2), and the other end of the linkage rod (5) is hinged to a base (103) of the electric saw (100).
  3. 3. The safety protection mechanism of the electric saw according to claim 2, wherein the linkage rod (5) is provided with a kidney-shaped hole (51), the linkage rod (5) is hinged to the base (103) through the kidney-shaped hole (51), a torsion spring (4) is arranged between the second cover body (2) and the frame (101), the torsion spring (4) enables the second cover body (2) to always have a downward swinging movement trend relative to the frame (101), when the frame (101) is in a downward pressing action, the second cover body (2) swings upwards relative to the first cover body (1) under the action of the linkage rod (5), and when the frame (101) is in an upward tilting action, the second cover body (2) swings downwards relative to the first cover body (1) under the action of the torsion spring (4).
  4. 4. The safety protection mechanism of the electric saw of claim 1, wherein when the first cover body (1) is located at the first position, the lower end of the first cover body (1) is abutted against the upper edge of the second cover body (2), and when the first cover body (1) is located at the second position, the second cover body (2) is covered outside the first cover body (1).
  5. 5. The safety protection mechanism of an electric saw according to claim 1, wherein the elastic locking mechanism (3) comprises a transmission rod (31) and a compression spring (32), the transmission rod (31) is fixedly connected with the first cover body (1), and the compression spring (32) is abutted between the frame (101) and the first cover body (1) so that the first cover body (1) always has a trend of moving towards the first position.
  6. 6. The safety protection mechanism of an electric saw according to claim 5, wherein the first cover body (1) is provided with a first stop block (11), the frame (101) is provided with a second stop block (1011) correspondingly matched with the first stop block (11), and the transmission rod (31) and the compression spring (32) are sequentially arranged between the first stop block (11) and the second stop block (1011).
  7. 7. A safety protection mechanism for an electric saw according to claim 6, wherein the transmission rod (31) is fixedly connected to the first stopper (11) through a bolt (33), and the compression spring (32) is sleeved on the periphery of the bolt (33).
  8. 8. A safety mechanism for an electric saw according to claim 6, wherein the first stop (11) is provided with a flange (111) for limiting the rotation of the drive rod (31).
  9. 9. The safety protection mechanism of an electric saw according to claim 4, wherein the lower end of the first cover body (1) is provided with a first protruding block (12) which is abutted against the upper edge of the second cover body (2) to be matched.
  10. 10. The safety protection mechanism of the electric saw of claim 4, wherein a rib (21) is arranged at the upper end of the second cover body (2), a clamping groove (22) is formed between every two adjacent ribs (21), a second protruding block (13) is arranged at the lower end of the first cover body (1), a clamping block (131) is arranged on the second protruding block (13), the clamping block (131) is in clamping fit with the clamping groove (22), a first inclined surface (211) is arranged on the rib (21), a second inclined surface (132) is arranged on the second protruding block (13), and the first inclined surface (211) and the second inclined surface (132) are in abutting fit.

Description

Safety protection mechanism of electric saw Technical Field The utility model relates to the technical field of electric saws, in particular to a safety protection mechanism of an electric saw. Background Existing compound saws with miter cut generally include a base, a movable platen, a frame, and a head assembly disposed on the frame and having a saw blade received within the frame and partially exposed to the frame. The specific structure and working principle of the compound saw can also participate in a compound saw disclosed in Chinese patent (publication number: CN 105081453A). For safety in use, a protective cover is mounted on the saw blade, and the protective cover generally comprises a front protective cover and a rear protective cover, and the front protective cover and the rear protective cover are matched to realize protection of the cutting edge of the saw blade. When the upturned end of the frame is pressed down, the front protective cover swings upwards relative to the frame to expose the cutting edge at the front end of the saw blade for cutting. In the prior art, the front protective cover of the compound saw is designed in an integrated manner, so that the actual effective protective area is limited. If the protection range is expanded by increasing the arc length (namely increasing the central angle) of the protection cover, the protection cover is limited and restrained by the movable platen when swinging upwards, so that the swinging angle of the front protection cover is insufficient. When the pressing frame cuts a workpiece, the front protective cover with a large central angle is easy to interfere with the workpiece to be cut due to insufficient swinging stroke. There is a need for improvements over the prior art. Disclosure of utility model The utility model aims to overcome the defects and shortcomings of the prior art and provide a safety protection mechanism of an electric saw, which comprises a front protection cover, wherein the front protection cover comprises a first cover body and a second cover body which are arranged in a split mode, and the first cover body can swing between a first position and a second position relative to a frame, so that the first cover body and the second cover body have two matched states, the protection requirement on the cutting edge of a saw blade can be met, and interference between the first cover body and a workpiece to be cut can be avoided. In order to achieve the above purpose, the present utility model adopts the following technical scheme: The safety protection mechanism of the electric saw comprises a front protection cover, wherein the front protection cover comprises a first cover body and a second cover body which are arranged in a split mode, the upper end of the first cover body is hinged to a frame of the electric saw, the first cover body can swing between a first position and a second position relative to the frame, an elastic locking mechanism is arranged between the frame and the first cover body and is used for enabling the first cover body to always have a trend of moving towards the first position, the center of the second cover body is hinged to the frame, when the frame is in a downward pressing action, the first cover body moves downwards along with the frame synchronously, the second cover body swings upwards along with the frame synchronously, the second cover body swings downwards relative to the first cover body, when the first cover body is located at the first position, the first cover body is in limit fit with the second cover body, and when the first cover body is located at the second position, the second cover body is out of limit fit with the limit position. Further, the electric saw further comprises a linkage rod, one end of the linkage rod is eccentrically hinged to the second cover body, and the other end of the linkage rod is hinged to the base of the electric saw. Further, the linkage rod is provided with a kidney-shaped hole, and the linkage rod is hinged to the base through the kidney-shaped hole; the frame is provided with a first cover body and a second cover body, a frame is arranged on the first cover body, a torsion spring is arranged between the second cover body and the frame, the torsion spring enables the second cover body to always have a movement trend of swinging downwards relative to the frame, when the frame is in a downward pressing action, the second cover body swings upwards relative to the first cover body under the action of a linkage rod, and when the frame is in an upward tilting action, the second cover body swings downwards relative to the first cover body under the action of the torsion spring. Further, the elastic locking mechanism comprises a transmission rod and a compression spring, the transmission rod is fixedly connected with the first cover body, and the compression spring is propped between the frame and the first cover body, so that the first cover body always has a t