TWI716253B - Cover device for circular sawing machine and circular sawing machine using the same - Google Patents

Abstract

The present invention relates to a protective cover device for a circular saw, which includes a fixed protective cover group, a movable protective cover and a quick opening assembly, wherein the quick opening assembly has a connecting rod protective cover, a first protective cover Cover connecting rod, a second cover connecting rod and a handle connecting rod, one end of the first and second cover connecting rods are respectively connected to the connecting rod cover and the movable cover, the first and second cover connecting rods The other ends are pivotally connected to each other. The bottom end of the handlebar link is pivotally connected to the first cover link. The top end of the handlebar link is connected to a handle under the auxiliary handle. When the handlebar is pulled through the handlebar link, The first protective cover connecting rod and the second protective cover connecting rod drive the movable protection cover to open the movable protection cover and allow the saw blade to be exposed. In addition, the present invention further provides a circular saw using the aforementioned cover device.

Description

Cover device for circular sawing machine and circular sawing machine using it

The invention relates to a sawing machine, and particularly refers to a protective cover device for a circular saw and a circular saw using the protective cover device.

When the general circular sawing machine is not in operation, the saw blade is usually covered by a protective cover, so as to prevent people from accidentally touching the saw blade and being injured. To perform sawing operations, the user should hold the handle tightly with one of the hands, while the other hand needs to leave the auxiliary handle to the side of the saw blade to open the movable cover to expose the saw blade, and then keep it like this The posture of sawing the workpiece.

However, in the sawing process, because only one hand is used for operation, the user is likely to have an unstable center of gravity and cause yaw, and because the handle of the traditional movable cover is quite close to the saw blade, once the user does not Hold it firmly, the hand used to open the cover is likely to be cut by the running saw blade. It can be seen that the design of the handle of the traditional movable cover is not perfect and there is still room for improvement.

The main purpose of the present invention is to provide a protective cover device for a circular saw, which can increase the stability of sawing and improve the safety of use.

In order to achieve the above main objective, the circular saw machine to which the cover device of the present invention is applied includes a casing, a motor provided in the casing, and a saw blade connected to the motor. The protective cover device of the present invention includes a fixed protective cover group, a movable protective cover, an elastic member, and a quick opening assembly. The fixed protective cover set is fixed on the casing and covers the upper half of the saw blade; the movable protective cover is pivoted on the casing and can move relative to the saw blade between a closed position and an open position, When the movable protective cover is in the closed position, the lower half of the saw blade is covered by the movable protective cover to prevent people from being cut by the saw blade. When the movable protective cover is in the open position, the The lower half of the saw blade is exposed for sawing operation; the elastic member is arranged between the fixed cover set and the movable cover to provide elastic force to keep the movable cover in the closed position; The opening assembly has a connecting rod shield, a first shield connecting rod, a second shield connecting rod, a handle connecting rod and a handle, wherein the connecting rod shield is arranged on the casing and the fixed Between the protective cover groups, the front end of the first protective cover connecting rod is connected to the connecting rod protective cover as a fulcrum, the rear end of the first protective cover connecting rod is pivoted to the front end of the second protective cover connecting rod, and the second protective cover The rear end of the cover link is connected to the movable protective cover, the bottom end of the handle link is pivoted to the first cover link, the top end of the handle link is connected to the handle, and the handle is located on the chassis Below an auxiliary handle, when the handle is pulled by an external force, the handle sequentially drives the movable cover from the closing through the handle link, the first cover link and the second cover link The position is actuated to the open position, and when the handle is released, the movable cover uses the elastic member to return to the closed position and maintain the position.

Since the handle is arranged below the auxiliary handle, the user's hand can open the movable cover through the handle without leaving the auxiliary handle, and use the reset elastic force of the elastic member to close the The movable protective cover not only increases the cutting stability, but also keeps hands away from the saw blade, thereby improving the safety of use.

Preferably, the fixed cover set has a left cover and a right cover, and the left cover and the right cover are butted with each other and are located on the left and right sides of the movable cover. The connecting rod protective cover is arranged between the left cover plate and the casing and has an opening penetrated by the handle connecting rod. A metal sheath is arranged on the periphery of the opening, and the metal sheath prevents the The handle connecting rod wears the connecting rod cover during the operation process, and the smoothness of the handle connecting rod is increased.

Preferably, the quick opening assembly further has a stopper provided on the connecting rod protective cover, when the movable protective cover is in the closed position, a front side of the movable protective cover abuts against the stopper to Limit the position of the movable cover.

The detailed structure, characteristics, assembling or use mode of the protective cover device for the circular saw provided by the present invention will be described in the detailed description of the following embodiments. However, those with ordinary knowledge in the field of the present invention should be able to understand that these detailed descriptions and specific examples for implementing the present invention are only used to illustrate the present invention, and are not intended to limit the scope of the patent application of the present invention.

The applicant first explains here that throughout the specification, including the following embodiments and claims in the scope of the patent application, the nouns related to directionality are based on the directions in the drawings. Secondly, in the following embodiments and drawings, the same element numbers represent the same or similar elements or structural features.

Please refer to Figures 1 and 2, the circular saw machine 10 shown in the figure includes a casing 12, the top edge of the casing 12 has a main handle 14 and an auxiliary handle 16 protruding from the front end of the autonomous handle 14 , A bottom plate 18 used to abut the surface of the workpiece is arranged under the casing 12, and a set of motors 20 are arranged on the left side of the casing 12. The power output by the motors 20 is transmitted to a set of gearboxes 22 after deceleration A drive shaft (not shown in the figure), and then a saw blade 24 located on the right side of the casing 12 is rotated by the drive shaft. Please continue to refer to FIGS. 3 and 4, the cover device 26 of the present invention is located on the right side of the casing 12 and includes a fixed cover set 30, a movable cover 40, an elastic member 50, and a quick opening assembly 60.

The fixed cover group 30 is located above the bottom plate 18 and covers the upper half of the saw blade 24. The fixed protective cover assembly 30 has a left cover plate 32, a right cover plate 34 and a transparent front cover plate 36. The left cover plate 32 and the right cover plate 34 are connected to each other and locked together on the right side of the casing 12. The front cover plate 36 is locked on the front ends of the left and right cover plates 32 and 34.

The movable protective cover 40 is located below the bottom plate 18 and covers the lower half of the saw blade 24. The movable protective cover 40 has a pivot hole 42, and the movable protective cover 40 is sleeved on the transmission shaft with the pivot hole 42, so that the movable protective cover 40 can move relative to the saw blade 24 between a closed position P1 and an open position P2. When the movable protective cover 40 is in the closed position P1 as shown in FIG. 6, the lower half of the saw blade 24 is almost covered by the movable protective cover 40 to prevent people from being cut by the saw blade 24. When the movable protective cover When 40 is at the open position P2 as shown in FIG. 7, a large part of the lower half of the saw blade 24 will be exposed for sawing the workpiece.

The elastic member 50 (here a tension spring is taken as an example). One end of the elastic member 50 is hooked to the left cover plate 32 of the fixed cover set 30 for fixing, and the other end of the elastic member 50 is hooked to the movable cover 40, so that the elastic member 50 provides elastic force to keep the movable cover 40 in the position shown in the figure. 6 shows the closed position P1.

The quick opening assembly 60 has a connecting rod cover 61, a first cover connecting rod 63, a second cover connecting rod 64, a handle connecting rod 70 and a handle 71, which are shown in Figures 3 and 4 As shown in Figure 6, the connecting rod cover 61 is located between the casing 12 and the fixed cover set 30 and is locked with the gear box 22. The top edge of the connecting rod cover 61 has an opening 62; the first cover The connecting rod 63 and the second cover connecting rod 64 are both arc-shaped and located between the left cover plate 32 of the fixed cover set 30 and the connecting rod cover 61. The front end of the first cover connecting rod 63 uses a screw 65 The rear end of the first protective cover connecting rod 63 is pivoted to the front end of the second protective cover connecting rod 64 by a rivet 68, and the rear end of the second protective cover connecting rod 64 is locked by a screw 66 Set on the movable cover 40, so that the movable cover 40 can be driven by the second cover link 64; the handle link 70 penetrates through the opening 62 of the link cover 61, and the bottom end of the handle link 70 is used The rivet 69 is pivoted to the first cover connecting rod 63, so that the first cover connecting rod 63 can be driven by the handle connecting rod 70; the handle 71 is located under the auxiliary handle 16 of the casing 12 and is locked in with the screw 67 Pull the top end of the handle connecting rod 70 so that the handle connecting rod 70 can be driven by the handle 71.

It can be seen from the above that when the movable cover 40 is to be opened, as shown in Fig. 5, hold the main handle 14 with your right hand, then hold the auxiliary handle 16 with your left hand, and then use the fingers of your left hand to pull the handle 71. When the handle 71 is pulled, the handle 71 will sequentially drive the movable cover 40 through the handle connecting rod 70, the first cover connecting rod 63 and the second cover connecting rod 64, so that the movable cover 40 will move from the position shown in Figure 6 The closed position P1 shown is moved to the open position P2 shown in FIG. 7. During the operation of the movable cover 40, the elastic member 50 is simultaneously stretched, so that the elastic member 50 accumulates the reset force. When the movable protective cover 40 reaches the open position P2 as shown in FIG. 7, the motor 20 can be started, and then the saw blade 24 is used to saw the workpiece. After the sawing operation is completed, first turn off the motor 20 to stop the saw blade 24, and then release the pulling force on the handle 71. At this time, the movable cover 40 will use the reset force accumulated by the elastic member 50 to quickly return and maintain its position. , So that the saw blade 24 is not exposed.

On the other hand, in order to avoid the wear of the connecting rod cover 61 when the connecting rod 70 is pulled up and down, a sheath 72 made of a metal material (such as stainless steel) has been added to the periphery of the opening 62, such as As shown in FIGS. 3 and 4, the protective cover 72 provides a protective effect to the connecting rod cover 61, and the low friction characteristics of the metal material can further increase the smoothness of the handle connecting rod 70. In addition, the quick-open assembly 60 further has a stop 73 provided on the connecting rod cover 61. When the movable cover 40 is in the closed position P1 as shown in FIG. 6, the front side 44 of the movable cover 40 will abut against The stopper 73 blocks the movable protective cover 40 by the stopper 73, so that the movable protective cover 40 will not be excessively displaced under the return elastic force of the elastic member 50, and thereby protect the elastic member 50 to increase its service life.

In summary, the cover device 26 of the present invention has the handle 71 arranged below the auxiliary handle 16, so that the user's hand can open the movable cover 40 through the handle without leaving the auxiliary handle 16, and After the hand is released, the movable protective cover 40 is closed by the reset force of the elastic member 50, which not only increases the cutting stability, but also keeps the hand away from the saw blade 24, thereby achieving the purpose of improving the safety of use.

10: Circular sawing machine

12: Chassis

14: Main handle

16: auxiliary handle

18: bottom plate

20: Motor

22: Gear box

24: saw blade

26: Cover device

30: fixed cover group

32: left cover

34: Right cover

36: front cover

40: Activity cover

42: pivot hole

44: front side

P1: Closed position

P2: open position

50: elastic parts

60: Quick opening components

61: connecting rod cover

62: opening

63: first cover connecting rod

64: The second cover connecting rod

65, 66, 67: screws

68, 69: Rivets

70: handle connecting rod

71: Handle

72: Sheath

73: Stop

Figure 1 is a perspective view of the circular sawing machine of the present invention. Figure 2 is a perspective view of the circular sawing machine of the present invention from another perspective. Fig. 3 is a perspective view of the circular saw machine of the present invention with some components omitted. Figure 4 is a perspective exploded view of the protective cover device of the present invention. Figure 5 is a side view of the circular sawing machine of the present invention, mainly showing the operating positions of the left and right hands. Figure 6 is a plan view of the protective cover device of the present invention with a saw blade, mainly showing that the movable protective cover is in the closed position. Figure 7 is similar to Figure 6, mainly showing that the movable cover is in the open position.

22: Gear box

24: saw blade

32: left cover

40: Activity cover

50: elastic parts

61: connecting rod cover

62: opening

63: first cover connecting rod

64: The second cover connecting rod

70: handle connecting rod

71: Handle

72: Sheath

73: Stop

Claims (10)

A protective cover device for a circular sawing machine. The circular sawing machine includes a casing, a motor arranged in the casing, and a saw blade connected to the motor. The casing has an auxiliary handle, and the protective cover device includes There are: a fixed protective cover set fixed on the casing and covering the upper half of the saw blade; a movable protective cover pivoted on the casing and can be opposed to the casing between a closed position and an open position The saw blade is activated. When the movable cover is in the closed position, the lower half of the saw blade is covered by the movable cover, and when the movable cover is in the open position, the lower half of the saw blade is exposed Outside; an elastic member, one end of which is provided in the fixed cover set, the other end of the elastic member is provided in the movable protective cover to provide elastic force to keep the movable protective cover in the closed position; and a quick opening assembly having A connecting rod cover, a first cover connecting rod, a second cover connecting rod, a handle connecting rod and a handle, the connecting rod cover is arranged between the casing and the fixed cover set , The front end of the first protective cover link is connected to the connecting rod protective cover, the rear end of the first protective cover link is pivoted to the front end of the second protective cover link, and the rear end of the second protective cover link is connected to the Movable protective cover, the bottom end of the handle link is pivoted to the first cover link, the handle is located under the auxiliary handle of the casing and connected to the top end of the handle link, when the handle is received When pulled by an external force, the handle sequentially drives the movable protective cover from the closed position to the open position through the handle connecting rod, the first protective cover connecting rod and the second protective cover connecting rod. The protective cover device for a circular sawing machine according to claim 1, wherein the fixed protective cover group has a left cover and a right cover, and the left cover and the right cover are butted with each other and are located in the movable The left and right sides of the protective cover; the connecting rod protective cover is arranged between the casing and the fixed protective cover set and has an opening, the first protective cover connecting rod and the second protective cover connecting rod are located on the left cover Between and the connecting rod protective cover, the pull handle connecting rod penetrates through the opening of the connecting rod protective cover; the two ends of the elastic member are respectively connected with the left cover plate and the movable protective cover. The protective cover device for a circular sawing machine according to claim 2, wherein a metal sheath is provided on the periphery of the opening. The cover device for a circular saw according to claim 1, wherein the first cover link and the second cover link are both arc-shaped. The protective cover device for a circular sawing machine according to claim 1, wherein the quick-opening assembly further has a stopper provided on the connecting rod protective cover, and when the movable protective cover is in the closed position, the movable A front side of the protective cover abuts against the stopper. A circular sawing machine, comprising: a casing with an auxiliary handle; a motor arranged in the casing; and a cover device as described in claim 1, which is opposite to the motor located in the casing. Side, the handle is located under the auxiliary handle of the cabinet. The circular saw according to claim 6, wherein the fixed cover set has a left cover and a right cover, the left cover and the right cover are butted with each other and are located on the left and right sides of the movable cover ; The connecting rod protective cover has an opening, the first protective cover connecting rod and the The second protective cover connecting rod is located between the left cover and the connecting rod protective cover, the pull handle connecting rod penetrates through the opening of the connecting rod protective cover; the elastic member is connected to the left cover and the left cover with its two ends respectively The activity cover. The circular saw according to claim 7, wherein a metal sheath is provided on the periphery of the opening. The circular saw according to claim 6, wherein the first protective cover connecting rod and the second protective cover connecting rod are both arc-shaped. The circular saw according to claim 6, wherein the quick opening assembly further has a stopper provided on the connecting rod cover, and when the movable cover is in the closed position, a front side of the movable cover The edge abuts against the stop.

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