CN212761470U

CN212761470U - Machine head locking device capable of facilitating replacement of saw blade on electric saw

Info

Publication number: CN212761470U
Application number: CN202021373956.3U
Authority: CN
Inventors: 沈兴祥; 黄飞
Original assignee: ZHANGJIAGANG CHUANGJI MACHINERY MANUFACTURING CO LTD
Current assignee: ZHANGJIAGANG CHUANGJI MACHINERY MANUFACTURING CO LTD
Priority date: 2020-07-14
Filing date: 2020-07-14
Publication date: 2021-03-23
Anticipated expiration: 2030-07-14

Abstract

The utility model discloses a saw bit aircraft nose locking device convenient to change on enabling electric saw, include: mounting bracket, be equipped with the locking plate that is located the aircraft nose side on the mounting bracket, the rear end and the mounting bracket of locking plate are articulated mutually, be equipped with opening locked groove up on the front end of locking plate, the locking plate is supported and is leaned on to spacing blend stop on its front end and the mounting bracket under the effect of the locking plate torsional spring of locating on the mounting bracket, be equipped with the rotatable pivot of controlling the trend on the aircraft nose casing, control the lockpin that resets by the lockpin spring of trend, the driving piece, lockpin inner sets up with pivot inner relatively, the lockpin outer end is towards the locking plate place side, be equipped with the slope shape boss that can press the lockpin on the inner of pivot, the pivot outer end is fixed mutually with. The machine head locking device locks the machine head when the machine head swings downwards to the position of replacing the saw blade, so that the saw blade can be conveniently replaced.

Description

Machine head locking device capable of facilitating replacement of saw blade on electric saw

Technical Field

The utility model relates to an electric tool field, concretely relates to enable saw bit be convenient for change's aircraft nose locking device on electric saw.

Background

The structure of the existing electric saw includes: the bottom plate is used for pressing the sawn object during cutting, the mounting frame and the machine head are provided with the saw blade, the saw blade is driven by a motor in the machine head to rotate, the mounting frame is arranged on the bottom plate, the rear end of the machine head is hinged with the mounting frame, so that the machine head can swing up and down on the mounting frame, a compression spring which can upwards push the machine head and upwards reset the machine head is arranged between the machine head and the mounting frame, the machine head upwards resets to abut against a limiting backer on the mounting frame and then enables the saw blade to be positioned above the bottom plate, the machine head is downwards pressed to overcome the elasticity of the compression spring and drive the saw blade to downwards swing and then enable the saw blade to downwards extend out of the bottom plate, the saw blade downwards extends out of the bottom plate and can be driven by the motor to rotate to cut the sawn object, in addition, when the saw blade needs to be changed, the machine head also needs to be downwards pressed, the machine head is kept at the position of replacing the saw blade by a worker who is required to press the machine head all the time in the whole saw blade replacing process, and one hand of the worker is required to press the machine head, so that the worker can replace the saw blade only by the other hand, the saw blade can be replaced conveniently, and the labor intensity of the worker can be increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: it would be desirable to provide a handpiece locking device that facilitates replacement of a saw blade on an electric saw.

In order to solve the above problem, the utility model discloses the technical scheme who adopts does: the aircraft nose locking device that enables saw bit be convenient for change on the electric saw includes: the mounting frame is arranged on the bottom plate, a locking plate positioned on the side surface of the machine head is arranged on the mounting frame, the rear end of the locking plate is hinged with the mounting frame, so that the locking plate can swing up and down, a locking groove with an upward opening is arranged at the front end of the locking plate, the locking plate swings upwards under the action of a locking plate torsion spring arranged on the mounting frame until the front end of the locking plate abuts against a limit stop strip on the mounting frame, a rotatable rotating shaft with left and right directions is arranged on the machine head shell, a locking pin which is reset by a locking pin spring and has left and right directions, a driving piece, the inner end of the locking pin is arranged opposite to the inner end of the rotating shaft, the outer end of the locking pin faces to the side of the locking plate, a slope-shaped boss which can press the locking pin is arranged at the inner end of the rotating shaft, the, the slope-shaped boss can gradually press the lock pin outwards through the slope surface, so that the outer end of the lock pin can extend outwards to a working position, the outer end of the lock pin in the working position can press the lock piece when the machine head swings downwards, so that the lock piece can swing downwards, so that the outer end of the lock pin can swing downwards along the upper side surface of the lock plate, when the machine head swings downwards to the position of replacing the saw blade, the outer end of the lock pin just moves to the upper part of the lock groove, at the moment, the lock plate can rotate upwards to reset under the action of the lock plate torsion spring, so that the outer end of the lock pin is clamped into the lock groove, thereby the locking plate can lock the machine head, the machine head locking mechanism is in a locking state, when needing to be unlocked, after the driving piece drives the rotating shaft to rotate reversely, the slope-shaped lug boss gradually loosens the pressing of the lock pin, the lock pin can retract under the action of the lock pin spring to be separated from the lock plate, so that the machine head locking mechanism can be in an unlocking state.

Further, aforesaid can make the aircraft nose locking device that the saw bit was convenient for changed on the electric saw, wherein: the driving piece is a handle, and the lower extreme and the pivot outer end of handle are fixed mutually, and the drive handle enables pivot forward rotation after swinging forward, and the drive handle enables pivot antiport after swinging backward, still is provided with on the aircraft nose casing and supplies forward wobbling handle to support and lean on and carry out preceding spacing chimb and can supply backward wobbling handle to support and carry out spacing back spacing chimb after to the handle.

Further, aforesaid can make the aircraft nose locking device that the saw bit was convenient for changed on the electric saw, wherein: be provided with the card platform in the pivot outer end, be provided with the draw-in groove on handle lower extreme inboard, the handle lower extreme passes through the screw looks locking with the pivot and fixes to card platform card is gone into to the draw-in groove during fixed, makes the handle can be rotatory through matched with card platform and draw-in groove drive pivot.

Further, aforesaid can make the aircraft nose locking device that the saw bit was convenient for changed on the electric saw, wherein: the inner side wall of the handle can respectively extrude the two positioning bosses when swinging back and forth, the elastic sheet where the positioning bosses are located can elastically deform inwards when the positioning bosses are extruded, so that the two positioning bosses can move inwards to abut against the inner side wall of the handle; when the handle swings forwards to abut against the front limiting convex edge, the front positioning boss can be just inserted into the front positioning hole to perform front positioning on the handle; when the handle swings backwards to abut against the rear limiting convex edge, the rear positioning boss can be just inserted into the rear positioning hole to perform rear positioning on the handle.

Further, aforesaid can make the aircraft nose locking device that the saw bit was convenient for changed on the electric saw, wherein: a U-shaped frame straddling the shell of the handpiece is arranged above the handle, and one side of the U-shaped frame is fixed with the upper end of the handle.

The utility model has the advantages that: the machine head locking device can lock the machine head when the machine head swings downwards to the position of replacing the saw blade, so that the machine head can be kept at the position of replacing the saw blade without manually pressing the machine head when the saw blade is replaced, and the saw blade can be conveniently replaced.

Drawings

Fig. 1 is a schematic perspective view of a viewing angle of the electric saw according to the present invention.

Fig. 2 is a schematic perspective view of another viewing angle of the electric saw according to the present invention.

Fig. 3 is a schematic view of the three-dimensional structure of the electric saw of the present invention in the state of replacing the saw blade.

Fig. 4 is a schematic view of the three-dimensional structure of the handpiece after the housing and the handle are removed from one side.

Fig. 5 is a schematic view of the three-dimensional structure of the electric saw after the machine head is removed.

Fig. 6 is a schematic structural diagram of the positions of the relevant parts when the handle is not swung forward and the motor start button is not pressed.

Fig. 7 is a schematic structural diagram of positions of relevant parts when the handle swings forward and the motor start button is not pressed.

Fig. 8 is a schematic view of the structure of the handle shown in fig. 1.

Fig. 9 is a schematic view of a portion of the housing of the handpiece shown in fig. 1 that mates with the handle.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.

As shown in fig. 1, 2, 3, 4, 5, 6, and 7, the handpiece lock mechanism has a structure in which: a locking plate 43 positioned on the side surface of the machine head 1 is arranged on the mounting frame 9, the rear end of the locking plate 43 is hinged with the mounting frame 9, so that the locking plate 43 can swing up and down, a locking groove 431 with an upward opening is arranged at the front end of the locking plate 43, the locking plate 43 swings up under the action of a locking plate torsion spring arranged on the mounting frame 9 until the front end of the locking plate 43 abuts against a limiting barrier on the mounting frame 9, a rotatable rotating shaft 41 in the left-right direction, a locking pin 42 reset by the locking pin spring in the left-right direction and a driving piece 4 are arranged on the shell of the machine head 1, the locking pin spring resetting the locking pin 42 is positioned between the locking pin 42 and the shell of the machine head 1, and the locking pin spring is; the inner end of the lock pin 42 is opposite to the inner end of the rotating shaft 41, the outer end of the lock pin 42 faces the side of the lock sheet 43, a slope-shaped boss 411 capable of pressing the lock pin 42 is arranged at the inner end of the rotating shaft 41, and the outer end of the rotating shaft 41 is fixed with the driving part 4, so that the rotating shaft 41 can be driven to rotate through the driving part 4; moreover, after the driving part 4 drives the rotating shaft 41 to rotate forward, the slope-shaped boss 411 can gradually press the lock pin 42 outwards through the slope, so that the outer end of the lock pin 42 can extend outwards to a working position, the outer end of the lock pin 42 at the working position can press the lock plate 43 when the machine head 1 swings downwards, so that the lock plate 43 can swing downwards, so that the outer end of the lock pin 42 can swing downwards by being attached to the upper side surface of the lock plate 43, when the machine head 1 swings downwards to a position for replacing the saw blade, the outer end of the lock pin 42 just moves to the upper side of the lock groove 431, at the moment, the lock plate 43 can rotate upwards and reset under the action of the lock plate torsion spring, so that the outer end of the lock pin 42 is clamped into the lock groove 431, so that the lock plate 43 can lock the machine head 1, at the time, when the machine head locking mechanism is in a locking state, after the rotating shaft 41 is driven, so that the lock pin 42 can be retracted to be disengaged from the lock piece 43 by the lock pin spring, thereby enabling the handpiece lock mechanism to be in the unlocked state.

The reason why the locking piece 43 can be pressed when the outer end of the locking pin 42 in the working position swings downwards is that: the motion track of the locking groove 431 is on a small circle with the hinge point of the locking plate 43 as the center of a circle, the motion track of the locking pin 42 is on a large circle with the hinge point of the handpiece 1 as the center of a circle, the small circle corresponding to the locking groove 431 and the large circle corresponding to the locking pin 42 intersect at two points, and the center of the small circle is positioned in the large circle; the outer end of the detent 42 can snap into the detent 431 because: the two circles have an intersection, so that the outer end of the lock pin 42 and the lock groove 431 can be clamped at the intersection of the two circles; the locking plate 43 can lock the handpiece 1 after the outer end of the lock pin 42 is clamped in the locking groove 431 because: the centers of the movement tracks of the lock pin 42 and the lock groove 431 are not the same, and after the lock groove 431 and the lock pin 42 are clamped, the lock groove 431 and the lock pin 42 can be limited to swing up or down, so that the lock pin 42 and the lock groove 431 can be limited to be clamped and cannot swing, and the lock plate 43 can lock the handpiece 1.

As shown in fig. 1, in this embodiment, the driving member 4 is a handle, the lower end of the handle 4 is fixed to the outer end of the rotating shaft 41, the rotating shaft 41 can rotate forward after the driving handle 4 swings forward, the rotating shaft 41 can rotate backward after the driving handle 4 swings backward, and the housing of the handpiece 1 is further provided with a front limiting flange 11 for allowing the forward swinging handle 4 to abut against and limiting the front of the handle 4 and a rear limiting flange 12 for allowing the rearward swinging handle 4 to abut against and limiting the rear of the handle 4.

As shown in fig. 8, a locking platform 45 is provided on the outer end of the rotating shaft 41, a locking groove 46 is provided on the inner side of the lower end of the handle 4, the lower end of the handle 4 is locked and fixed with the rotating shaft 41 through a screw, and the locking platform 45 is locked and fixed into the locking groove 46, so that the handle 4 can drive the rotating shaft 41 to rotate through the locking platform 45 and the locking groove 46 which are matched.

As shown in fig. 8 and 9, two elastic sheet holes 7 arranged in front and back are formed in the surface of the casing of the handpiece 1 opposite to the inner side wall of the handle 4, an elastic sheet 71 with one end fixed to the casing of the handpiece 1 and the other end not fixed is arranged in each of the two elastic sheet holes 7, a positioning boss protruding outwards from the surface of the casing of the handpiece 1 is arranged on the outer surface of the unfixed end of each of the two elastic sheets 71, the two positioning bosses are respectively a front positioning boss 61 and a rear positioning boss 62, a front positioning hole 51 and a rear positioning hole 52 are formed in the inner side wall of the handle 4, the inner side wall of the handle 4 can respectively extrude the two positioning bosses when swinging back and forth, and the elastic sheet 71 where the positioning bosses are located can elastically deform inwards when the positioning bosses are extruded, so that the two positioning bosses can move inwards and abut against the inner side wall of; when the handle 4 swings forwards to abut against the front limiting convex edge 11, the front positioning boss 61 can be just inserted into the front positioning hole 51 to position the handle 4 forwards; when the handle 4 swings backwards to abut against the rear limiting convex edge 12, the rear positioning boss 62 can be just inserted into the rear positioning hole 52 to perform rear positioning on the handle 4. The handle 4 is positioned to prevent the handle 4 from swinging when not being driven.

A U-shaped frame 47 straddling the shell of the handpiece 1 is arranged above the handle 4, and one side of the U-shaped frame 47 is fixed with the upper end of the handle 4. The U-shaped bracket 47 is provided, on the one hand, to facilitate the swinging of the driving handle 4 and, on the other hand, to guide the forward and backward swinging of the handle 4.

Claims

1. The aircraft nose locking device that enables saw bit be convenient for change on the electric saw includes: the mounting frame is arranged on the bottom plate, a locking plate positioned on the side surface of the machine head is arranged on the mounting frame, the rear end of the locking plate is hinged with the mounting frame, so that the locking plate can swing up and down, a locking groove with an upward opening is arranged at the front end of the locking plate, the locking plate swings upwards under the action of a locking plate torsion spring arranged on the mounting frame until the front end of the locking plate abuts against a limit stop strip on the mounting frame, a rotatable rotating shaft with left and right directions is arranged on the machine head shell, a locking pin which is reset by a locking pin spring and has left and right directions, a driving piece, the inner end of the locking pin is arranged opposite to the inner end of the rotating shaft, the outer end of the locking pin faces to the side of the locking plate, a slope-shaped boss which can press the locking pin is arranged at the inner end of the rotating shaft, the, the slope-shaped boss can gradually press the lock pin outwards through the slope surface, so that the outer end of the lock pin can extend outwards to a working position, the outer end of the lock pin in the working position can press the lock piece when the machine head swings downwards, so that the lock piece can swing downwards, so that the outer end of the lock pin can swing downwards along the upper side surface of the lock plate, when the machine head swings downwards to the position of replacing the saw blade, the outer end of the lock pin just moves to the upper part of the lock groove, at the moment, the lock plate can rotate upwards to reset under the action of the lock plate torsion spring, so that the outer end of the lock pin is clamped into the lock groove, thereby the locking plate can lock the machine head, the machine head locking mechanism is in a locking state, when needing to be unlocked, after the driving piece drives the rotating shaft to rotate reversely, the slope-shaped lug boss gradually loosens the pressing of the lock pin, the lock pin can retract under the action of the lock pin spring to be separated from the lock plate, so that the machine head locking mechanism can be in an unlocking state.

2. The head locking device for facilitating replacement of a saw blade of a power saw as claimed in claim 1, wherein: the driving piece is a handle, and the lower extreme and the pivot outer end of handle are fixed mutually, and the drive handle enables pivot forward rotation after swinging forward, and the drive handle enables pivot antiport after swinging backward, still is provided with on the aircraft nose casing and supplies forward wobbling handle to support and lean on and carry out preceding spacing chimb and can supply backward wobbling handle to support and carry out spacing back spacing chimb after to the handle.

3. The head locking device for facilitating replacement of a saw blade of a power saw as claimed in claim 2, wherein: be provided with the card platform in the pivot outer end, be provided with the draw-in groove on handle lower extreme inboard, the handle lower extreme passes through the screw looks locking with the pivot and fixes to card platform card is gone into to the draw-in groove during fixed, makes the handle can be rotatory through matched with card platform and draw-in groove drive pivot.

4. The head locking device for a saw blade of an electric saw capable of facilitating replacement according to claim 2 or 3, wherein: the inner side wall of the handle can respectively extrude the two positioning bosses when swinging back and forth, the elastic sheet where the positioning bosses are located can elastically deform inwards when the positioning bosses are extruded, so that the two positioning bosses can move inwards to abut against the inner side wall of the handle; when the handle swings forwards to abut against the front limiting convex edge, the front positioning boss can be just inserted into the front positioning hole to perform front positioning on the handle; when the handle swings backwards to abut against the rear limiting convex edge, the rear positioning boss can be just inserted into the rear positioning hole to perform rear positioning on the handle.

5. The head locking device for a saw blade of an electric saw capable of facilitating replacement according to claim 2 or 3, wherein: a U-shaped frame straddling the shell of the handpiece is arranged above the handle, and one side of the U-shaped frame is fixed with the upper end of the handle.