阅读说明：本技术 一种电圆锯用轴锁安全结构 (Shaft lock safety structure for electric circular saw ) 是由 杨伟明 韩挺 于 2020-06-23 设计创作，主要内容包括：本发明针对现有技术中电圆锯上的轴锁机构与安全开关之间没有联动机构造成电机使用寿命短且存在安全隐患的弊端,提供一种电圆锯用轴锁安全结构,属于电圆锯技术领域,包括固定座、固定设置在固定座上的外壳和电机,所述外壳上安装有同时按下才能控制电机工作的安全开关和启动开关,固定座上安装有能同时对电机转轴和安全开关锁定的轴锁机构。本发明设置的轴锁机构能够对电圆锯上电机的转轴进行锁定,且能同时对安全开关进行锁定,能够有效延长电机使用寿命以及提升安全性能。(The invention provides a shaft lock safety structure for an electric circular saw, aiming at the defects that no linkage machine is arranged between a shaft lock mechanism and a safety switch on the electric circular saw in the prior art, so that the service life of a motor is short and potential safety hazards exist, and the shaft lock safety structure for the electric circular saw belongs to the technical field of electric circular saws. The shaft locking mechanism provided by the invention can lock the rotating shaft of the motor on the electric circular saw and can lock the safety switch at the same time, so that the service life of the motor can be effectively prolonged and the safety performance can be improved.)

1. The utility model provides an electric circular saw is with shaft lock safety structure, a serial communication port, including fixing base, fixed shell and the motor of setting on the fixing base, install the safety switch and the starting switch who just can control motor work of pressing simultaneously on the shell, install the shaft lock mechanism that can lock motor shaft and safety switch simultaneously on the fixing base.

2. The shaft lock safety structure for the electric circular saw as claimed in claim 1, wherein the shaft lock mechanism includes a locking plate disposed on the holder and slidable only in a fixed linear direction, the locking plate is provided with a through hole and a limiting through groove which are communicated with each other, the rotating shaft of the motor can pass through the through hole and can rotate in the through hole, the limiting through groove is of a square structure and the length direction of the limiting through groove is parallel to the sliding track of the locking plate, the side surface of the rotating shaft of the motor is provided with a limiting surface which is recessed relative to the side surface of the rotating shaft, the width of the position of the limiting surface on the rotating shaft is not greater than the width of the limiting through groove, and the width of the limiting through groove; the fixed seat is also provided with a shaft lock switch which can slide back and forth on the fixed seat, and a clamping block is fixedly arranged on the shaft lock switch; a first spring capable of pushing the locking plate to enable the rotating shaft of the motor to be embedded into the through hole is arranged between the locking plate and the fixing seat, a second spring capable of pushing the locking plate to enable the rotating shaft of the motor to be embedded into the limiting through groove is arranged between the locking plate and the shaft lock switch, a clamping groove matched with the clamping block is arranged on the fixing seat, when the clamping block is located in the clamping groove, the rotating shaft of the motor is embedded into the limiting through groove, and when the clamping block is not located in the clamping groove and acting forces of the first spring and the second spring on the locking plate are balanced, the rotating shaft of the motor is located; the safety switch comprises a microswitch, a button and a second fixing rod for driving the microswitch, the button is fixedly connected with the second fixing rod, the side surface of the button protrudes outwards relative to the shell, an adjusting block is fixedly arranged on the upper end surface of the second fixing rod, the safety switch is rotatably connected with the shell by arranging a first mounting shaft, a torsion spring capable of pushing the second fixing rod to rotate downwards is further arranged in the shell, a supporting block which is positioned below the end part of the second fixing rod and used for limiting the second fixing rod is further fixedly arranged on the shell, a swinging plate matched with the adjusting block is further arranged in the shell, the swinging plate is rotatably connected with the shell by arranging the second mounting shaft, and when the swinging plate rotates to the position of the adjusting block around the second mounting shaft, the swinging plate can prevent the second fixing rod from rotating upwards around the first mounting shaft; the locking piece is fixedly connected with a connecting piece which can drive the swinging plate to rotate around the second mounting shaft, and the lower end of the swinging plate is movably connected with the connecting piece.

3. The shaft lock safety structure for electric circular saw as claimed in claim 2, wherein the connecting plate has a notch at an upper end thereof, and the lower end of the swing plate is always inserted into the notch of the connecting plate.

4. The shaft lock safety structure for electric circular saw as claimed in claim 2 or 3, wherein the upper end of the swing plate is provided with a sleeve hole penetrating through the swing plate, the second fixing rod is disposed in the sleeve hole and the adjusting block can be inserted into the sleeve hole along with the second fixing rod, and a connection between a side of the adjusting block facing the button and the upper end surface of the second fixing rod is an inclined surface.

5. The shaft lock safety structure for electric circular saw as claimed in claim 2, wherein the first mounting shaft is fixedly installed at a connection between the button and the second fixing lever and both ends of the first mounting shaft are protruded outwardly, the first mounting shaft is installed in the housing in a rotatable manner, the second mounting shaft is vertically and fixedly installed on the swing plate and both ends of the second mounting shaft are protruded with respect to both sides of the swing plate, and the second mounting shaft is installed in the housing in a rotatable manner.

6. The shaft lock safety structure for the electric circular saw as claimed in claim 2, wherein the locking plate comprises a locking plate, the through hole and the limiting through groove are arranged on the locking plate, a guide plate is fixedly connected to each of the left and right sides of the locking plate, a fixing plate is vertically and fixedly connected to one of the guide plates, a first mounting post is fixedly connected to each of the front and rear sides of the fixing plate, the two first mounting posts are located on the same straight line, a guide hole for guiding the guide plate is formed in the fixing seat, and the guide plate is sleeved in the guide hole and can only slide along the guide hole; the fixing seat and the shaft lock switch are respectively and fixedly provided with a second mounting column, two ends of the first spring are respectively sleeved on the first mounting column on the fixing piece and the second mounting column on the fixing seat, two ends of the second spring are respectively sleeved on the other first mounting column on the fixing piece and the second mounting column on the shaft lock switch, and the first spring and the second spring are positioned on the same straight line.

7. The shaft lock safety structure for the electric circular saw as claimed in claim 6, wherein the fixing base is a hollow structure, the shaft lock switch includes a push plate located above the fixing base, a base located in an inner cavity of the fixing base is fixedly arranged on the push plate, a mounting hole penetrating through the base is formed in the base, two connecting rods respectively located on two sides of the mounting hole are fixedly connected to a rear side surface of the base, a first fixing rod is fixedly connected between the two connecting rods, a second mounting post on the shaft lock switch is fixedly arranged on the first fixing rod and parallel to the connecting rods, and a second spring is sleeved in the mounting hole and located between the two connecting rods; the fixture block is fixedly arranged on the front side of the lower end face of the push plate.

8. The shaft lock safety structure for electric circular saws as claimed in claim 7, wherein the side surface of the side wall of the engaging groove with the engaging block is an inclined surface, the inclined surface of the engaging groove is inclined from top to bottom toward the outside of the engaging groove, the inclined surface of the engaging block is also an inclined surface, and the inclined surface of the engaging block is inclined from top to bottom toward the outside of the engaging block.

9. The shaft lock safety structure for electric circular saws as claimed in claim 8, wherein the lower end surface of the push plate comprises a first plane and a second plane, the first plane is parallel to the upper end surface of the push plate, the second plane is inclined relative to the first plane, the upper end surface of the fixing base is fixedly connected with a protruding strip perpendicular to the sliding direction of the shaft lock switch, when the clamping block is located at the upper end surface of the fixing base, the second plane is parallel to the upper end surface of the fixing base, and when the clamping block is embedded into the clamping groove, the first plane is parallel to the upper end surface of the fixing base and the upper end surface of the protruding strip is in contact with the first plane.

10. The shaft lock safety structure for electric circular saws as claimed in claim 9, wherein the lower end surface of the push plate is provided with two parallel fixing strips perpendicular to the protruding strips, the upper end surface of the push plate is fixedly provided with a force-bearing block, and the upper end surface of the push plate is provided with an anti-slip protrusion.

Technical Field

The invention belongs to the technical field of electric circular saws, and particularly relates to a shaft lock safety structure for an electric circular saw.

Background

The electric circular saw is a tool which takes a single-phase series motor as power and then drives a circular saw blade to saw through a transmission mechanism, has the characteristics of safety, reliability, high working efficiency and the like, and is widely applied to various fields of garden operation, wood processing and the like. In order to promote electric circular saw's safety in utilization performance, generally all can set up an axle locking mechanism and safety switch on electric circular saw, avoid leading to the unexpected start-up of electric circular saw because of the starting switch that touches electric circular saw carelessly, when needing to use electric circular saw, need let axle locking mechanism remove the locking to motor shaft earlier, press safety switch and starting switch simultaneously again and just can driving motor work, mutual independence between electric circular saw's the axle locking mechanism and the safety switch among the prior art, there is not link gear. When the motor is used, if a worker forgets to unlock the motor rotating shaft by the shaft locking mechanism, the safety switch and the starting switch are pressed simultaneously, the motor is driven to work, the motor rotating shaft is locked by the shaft locking mechanism at the moment, the motor rotating shaft cannot rotate, the motor can be damaged, the service life of the motor is influenced, and certain potential safety hazards exist.

Disclosure of Invention

Aiming at the defects that no linkage machine is arranged between a shaft lock mechanism and a safety switch on the electric circular saw in the prior art, so that the service life of a motor is short and potential safety hazards exist, the shaft lock safety structure for the electric circular saw is provided.

The invention aims to be realized by the following technical scheme: the utility model provides an electric circular saw is with shaft lock safety structure, includes fixing base, fixed shell and the motor of setting on the fixing base, install safety switch and the starting switch who just can control motor work simultaneously and press on the shell, install the shaft lock mechanism that can lock motor shaft and safety switch simultaneously on the fixing base. In this scheme, when using axle locking mechanism to lock the pivot of motor, axle locking mechanism also can lock safety switch to can't press safety switch and starting switch simultaneously, and then can not unexpected driving motor effect when axle locking mechanism locks the pivot of motor, can prolong the life of motor and use more safely.

Preferably, the shaft locking mechanism comprises a locking plate which is arranged on the fixing seat and can only slide along a fixed linear direction, the locking plate is provided with a through hole and a limiting through groove which are communicated with each other, a rotating shaft of the motor can penetrate through the through hole and can rotate in the through hole, the limiting through groove is of a square structure, the length direction of the limiting through groove is parallel to the sliding track of the locking plate, a limiting surface is arranged on the side surface of the rotating shaft of the motor and is recessed relative to the side surface of the rotating shaft, the width of the position of the limiting surface on the rotating shaft is not more than the width of the limiting through groove, and the; the fixed seat is also provided with a shaft lock switch which can slide back and forth on the fixed seat, and a clamping block is fixedly arranged on the shaft lock switch; a first spring capable of pushing the locking plate to enable the rotating shaft of the motor to be embedded into the through hole is arranged between the locking plate and the fixing seat, a second spring capable of pushing the locking plate to enable the rotating shaft of the motor to be embedded into the limiting through groove is arranged between the locking plate and the shaft lock switch, a clamping groove matched with the clamping block is arranged on the fixing seat, when the clamping block is located in the clamping groove, the rotating shaft of the motor is embedded into the limiting through groove, and when the clamping block is not located in the clamping groove and acting forces of the first spring and the second spring on the locking plate are balanced, the rotating shaft of the motor is located; the safety switch comprises a microswitch, a button and a second fixing rod for driving the microswitch, the button is fixedly connected with the second fixing rod, the side surface of the button protrudes outwards relative to the shell, an adjusting block is fixedly arranged on the upper end surface of the second fixing rod, the safety switch is rotatably connected with the shell by arranging a first mounting shaft, a torsion spring capable of pushing the second fixing rod to rotate downwards is further arranged in the shell, a supporting block which is positioned below the end part of the second fixing rod and used for limiting the second fixing rod is further fixedly arranged on the shell, a swinging plate matched with the adjusting block is further arranged in the shell, the swinging plate is rotatably connected with the shell by arranging the second mounting shaft, and when the swinging plate rotates to the position of the adjusting block around the second mounting shaft, the swinging plate can prevent the second fixing rod from rotating upwards around the first mounting shaft; the locking piece is fixedly connected with a connecting piece which can drive the swinging plate to rotate around the second mounting shaft, and the lower end of the swinging plate is movably connected with the connecting piece. The starting switch and the microswitch are connected in series with the motor. When the rotating shaft of the motor is locked by using the shaft locking mechanism, only the shaft locking switch needs to be pushed to enable the clamping block on the shaft locking switch to be embedded into the clamping groove, the through hole side wall on the locking plate is clung to the rotating shaft at the moment, the second spring is compressed, the hand of an operator can leave the shaft locking switch, then the rotating shaft of the motor can be driven to rotate by rotating the saw blade locking bolt on the rotating shaft, the limiting surface on the rotating shaft is aligned with the limiting through groove side wall on the locking plate, the limiting through groove on the locking plate can be embedded in the position of the limiting surface on the rotating shaft at the moment under the pushing of the second spring, the locking of. When the locking plate was promoted by the second spring, the connecting plate can remove along with the locking plate together, and then drives the swing board swing and make swing board upper end remove to the regulating block position, and the swing board just can prevent the second dead lever and rotate around first installation axle to make the button on the safety switch unable to press, the second dead lever just can not rotate around first installation axle and unable and micro-gap switch contact, can not driving motor work yet. When the locking of counter shaft is relieved to needs, only need break away from fixture block and draw-in groove on the axle lock switch, under the elastic action of first spring, the locking plate will move initial position, but the pivot is located the through-hole rotation this moment, thereby can realize relieving the locking, at this in-process, the connecting plate can drive the swinging plate and make swinging plate upper end and regulating block separation round second installation hub rotation, can press the button drive second dead lever this moment and rotate and drive micro-gap switch, press starting switch simultaneously and can control motor normal work.

Preferably, the upper end of the connecting sheet is provided with a notch, and the lower end of the swinging plate is always embedded into the notch on the connecting sheet. This connection structure is comparatively simple, and can realize swing joint between swing board and the connection piece, when the connection piece removed along with the locking plate, can promote swing board and rotate.

Preferably, the upper end of the swing plate is provided with a sleeve hole penetrating through the swing plate, the second fixing rod is arranged in the sleeve hole, the adjusting block can be inserted into the sleeve hole along with the second fixing rod, and a connecting part between one side of the adjusting block facing the button and the upper end face of the second fixing rod is an inclined plane. The oscillating plate rotates around the second mounting shaft to enable the sleeve hole to be sleeved on the adjusting block, namely the position, provided with the adjusting block, of the second fixing rod is sleeved in the sleeve hole, and the oscillating plate can limit the second fixing rod at the moment, so that the second fixing rod is prevented from being upwards lifted up from the end part matched with the micro switch, and the second fixing rod cannot be contacted with the micro switch. When the swinging plate rotates to other positions of the second fixing rod along the inclined plane, the second fixing rod can rotate upwards and touch the micro switch.

Preferably, the first mounting shaft is fixedly disposed at a connection portion between the button and the second fixing lever, and both ends of the first mounting shaft protrude outward, the first mounting shaft is rotatably mounted in the housing, the second mounting shaft is vertically and fixedly disposed on the swing plate, both ends of the second mounting shaft protrude with respect to both sides of the swing plate, and the second mounting shaft is rotatably mounted in the housing.

Preferably, the locking plate comprises a locking plate, the through hole and the limiting through groove are arranged on the locking plate, the left side and the right side of the locking plate are respectively fixedly connected with a guide plate, one guide plate is vertically and fixedly connected with a fixing plate, the front side and the rear side of the fixing plate are respectively fixedly connected with a first mounting column, the two first mounting columns are positioned on the same straight line, the fixing seat is provided with a guide hole which plays a role in guiding the guide plate, and the guide plate is sleeved in the guide hole and can only slide along the guide hole; the fixing seat and the shaft lock switch are respectively and fixedly provided with a second mounting column, two ends of the first spring are respectively sleeved on the first mounting column on the fixing piece and the second mounting column on the fixing seat, two ends of the second spring are respectively sleeved on the other first mounting column on the fixing piece and the second mounting column on the shaft lock switch, and the first spring and the second spring are positioned on the same straight line. The guide piece that sets up and the guiding hole cooperation on the fixing base can play the guide effect to the locking plate, makes the locking plate can only slide along fixed linear direction, realization that can be accurate to the locking of countershaft. The fixing piece, the first mounting column and the second mounting column are arranged to facilitate mounting of the first spring and the second spring.

Preferably, the fixing seat is of a hollow structure, the shaft lock switch comprises a push plate positioned above the fixing seat, a base positioned in an inner cavity of the fixing seat is fixedly arranged on the push plate, a mounting hole penetrating through the base is formed in the base, two connecting rods respectively positioned on two sides of the mounting hole are fixedly connected to the rear side surface of the base, a first fixing rod is fixedly connected between the two connecting rods, a second mounting column on the shaft lock switch is fixedly arranged on the first fixing rod and is parallel to the connecting rods, and a second spring is sleeved in the mounting hole and is positioned between the two connecting rods; the fixture block is fixedly arranged on the front side of the lower end face of the push plate. In this scheme, the mounting hole can transversely be spacing to the second spring, and horizontal distortion when avoiding the second spring compression can guarantee that the second spring is stable to the elasticity of locking plate.

As preferred, the side of draw-in groove and fixture block complex lateral wall is the inclined plane, and the inclined plane on the draw-in groove from top to bottom is towards the outside slope of draw-in groove gradually, also be the inclined plane with draw-in groove complex inclined plane on the fixture block, the inclined plane on the fixture block from top to bottom is towards the outside slope of fixture block gradually. The setting on two inclined planes makes the fixture block difficult follow the draw-in groove when embedding in the draw-in groove break away from to can carry out better limiting displacement to the shaft lock switch, avoid the shaft lock switch not hard up.

Preferably, the lower end face of the push plate comprises a first plane and a second plane, the first plane is parallel to the upper end face of the push plate, the second plane is obliquely arranged relative to the first plane, the upper end face of the fixing seat is fixedly connected with a raised strip perpendicular to the sliding direction of the shaft lock switch, when the clamping block is located at the upper end face of the fixing seat, the second plane is parallel to the upper end face of the fixing seat, and when the clamping block is embedded into the clamping groove, the first plane is parallel to the upper end face of the fixing seat and the upper end face of the raised strip is in contact with the first plane. The shaft lock switch is pushed towards the rotating shaft direction to enable the clamping block to move to the upper portion of the clamping groove, the shaft lock switch is pressed downwards to enable the clamping block to be embedded into the clamping groove, the clamping block can be firmly clamped in the clamping groove under the elastic action of the second spring, and the clamping block is not prone to being separated from the clamping groove due to the inclined planes of the clamping groove and the clamping block. When the clamping block needs to be loosened, the shaft lock switch only needs to be pushed forwards and downwards exerts force according to the tail end of the push plate, under the supporting effect of the convex strips, the front end of the push plate can be upwards lifted, so that the clamping block is separated from the clamping groove, the shaft lock switch is loosened slowly at the moment, and under the elastic effect of the first spring, the shaft lock switch can move to the initial position towards one side of the second spring.

Preferably, the lower end face of the push plate is provided with two parallel fixing strips, and the fixing strips are perpendicular to the convex strips. The setting of fixed strip can avoid the push pedal direct with the sand grip contact, can make the slip of shaft lock switch more smooth and easy. The upper end face of the push plate is fixedly provided with a stress block, and the upper end face of the push plate is provided with an anti-skid bulge. The arrangement of the stress block and the protection bulge can make the pushing shaft lock switch more convenient.

Compared with the prior art, the invention has the following beneficial effects: the shaft locking mechanism provided by the invention can lock the rotating shaft of the motor on the electric circular saw and can lock the safety switch at the same time, so that the service life of the motor can be effectively prolonged and the safety performance can be improved.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a perspective view of the shaft lock mechanism;

FIG. 4 is a perspective view of the fixing base;

FIG. 5 is a perspective view of the locking plate;

FIG. 6 is a perspective view of the shaft lock switch;

FIG. 7 is a perspective view of the spindle;

FIG. 8 is a schematic view of the connection structure between the button, the second fixing rod, the adjusting block and the first mounting shaft;

FIG. 9 is a perspective view of the swing plate;

FIG. 10 is a schematic view of the safety switch pressed when the spindle is unlocked according to the present invention;

FIG. 11 is a schematic view of the shaft lock mechanism in the unlocked position;

FIG. 12 is a schematic view of the locking structure of the safety switch and the shaft of the present invention;

FIG. 13 is a perspective view of the shaft lock mechanism locking the shaft;

FIG. 14 is a perspective view of the shaft lock mechanism locking the shaft;

the labels in the figure are: 1. the fixing base comprises a fixing base, 2, a motor, 3, a locking plate, 4, a through hole, 5, a limiting through groove, 6, a limiting surface, 7, a shaft lock switch, 8, a first spring, 9, a second spring, 10, a clamping block, 11, a clamping groove, 12, a locking plate, 13, a guide plate, 14, a fixing plate, 15, a first mounting column, 16, a guide hole, 17, a second mounting column, 18, a push plate, 19, a base, 20, a mounting hole, 21, a connecting rod, 22, a first fixing rod, 23, a first plane, 24, a second plane, 25, a convex strip, 26, a fixing strip, 27, a stress block, 28, an anti-slip bulge, 29, a rotating shaft, 30, a shell, 31, a safety switch, 32, a starting switch, 33, a shaft lock mechanism, 34, a micro-motion switch, 35, a button, 36, a second fixing rod, 37, a first mounting shaft, 38, an adjusting block, 39, a torsion spring, 40, a supporting block, 42, 41, second installation axle, 43, connecting piece, 44, breach, 45, trepanning.

Detailed Description

The invention will be further described with reference to examples of embodiments shown in the drawings to which: