CN104552182A - Electric tool operating part - Google Patents

Abstract

The invention relates to an electric tool. The electric tool has a power-driven component motor, a grinding wheel for grinding or cutting operations, a motor housing for supporting the motor, and a rear cover installed in the rear end area of the motor housing. The housing and the rear cover are held together by the operator. The handle; the operating rod is operated by the operator and installed on the rear cover; the switch is installed in the rear cover, the switch is in contact with the operating rod, and the rear cover is equipped with a locking mechanism that can limit the movement of the operating rod. Carry out the on-off control of the switch to achieve the control of whether the motor of the driving part is energized.

Description

Power Tool Operating Parts

technical field

The invention relates to the technical field of electric tools, in particular to a construction technique in which an operating rod and a locking mechanism on a rear cover part with a grip function control the on and off of a motor.

Background technique

The electric tool operating mechanism used in the prior art, such as Japanese Patent Application Laid-Open No. 2005-246542, discloses a technical solution in which a disc grinder uses a head-end tool to perform a specific processing operation on a workpiece. The electric tool has a casing for housing the motor, a motor, a tail cover, a power cord, and a gearbox including 2 sets of bevel gears, a main shaft, and a grinding wheel.

The rear end of the casing has a tail cover, which is grasped by the user, and an operating part is provided on the tail cover for operation when driving the motor. It includes: a switch, a switch lever, and a plunger for pressing the switch , and disconnect the locking lever, which is used to keep the switch lever in a certain state. The switch lever swings in the direction of the arrow in the figure with the rotation axis as the center, and at this time, the plunger is pressed in conjunction with each other, so that the switch is turned on. The operator releases the switch lever, and under the action of the spring, the switch lever returns to its original position. For such electric tools, it is necessary to improve the operating performance of the operating part during design, improve the strength of the operating part and the sealing and strength of the position of the rear cover, reduce the structure of the motor housing, including reducing the corresponding mold Structure. The operator can reduce the fatigue of the user when using it for a long time during continuous operation.

Since the operating mechanism adopts the rotating structure of the hole shaft, the structure must be complex and requires more parts to realize, which makes the mechanism cost high; because the mechanism locking mechanism adopts the rotating mechanism, the number of parts must be large, the installation is difficult, and the mechanism cost is high.

Contents of the invention

The purpose of the present invention is to provide an electric tool operating mechanism, aiming to solve the problem of low cost, improve the operating performance of the operating part, improve safety, and reduce the operator's fatigue when working continuously for a long time. fatigue.

Still another object of the present invention is to provide a switch mechanism of an electric tool that can be turned on and off at low cost.

Another object of the present invention is to provide a switch locking mechanism for electric tools, thereby improving the operating safety

The technical solution adopted by the present invention to solve the problems of the prior art is:

An electric tool is designed, comprising: a power drive component motor, a casing for supporting the above-mentioned motor; a transmission mechanism, which is located at the front end of the above-mentioned casing, and is used to transmit the power of the above-mentioned motor; a rear cover, which is located at the above-mentioned casing the rear part of the rear end; the switch is located at the rear side of the above-mentioned casing; the operating rod is located at the position of the rear cover and can move relative to the rear cover. Power outage control.

Further, the tool is provided with a locking mechanism, which can limit the movement state of the operating rod.

Further, the locking mechanism is provided with a convex surface, a concave surface and a locking column.

Further, the convex surface has multiple states, so that the states of the concave surface and the locking post can be controlled.

Further, the locking post cooperates with the operating rod, and the state change of the locking post can limit the movement state of the operating rod.

Further, the operation lever has a raised point, which can cooperate with the rear cover or the casing, and the raised point limits the movement direction of the operation lever.

Further, a locking mechanism is installed at the rear of the rear cover, and the locking mechanism can control the movement state of the operating rod.

Description of drawings

The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing;

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic diagram of the locking mechanism of the present invention.

Fig. 3 is a schematic diagram of unlocking the locking mechanism of the present invention.

Fig. 4 is a schematic diagram of the locking mechanism of the present invention.

in

100 Electric tool machine 103 Body part 105 Motor housing 107 Transmission mechanism housing

111 power transmission mechanism 113 small bevel gear 115 large bevel gear 117 main shaft

119 grinding wheel 121 motor 123 output shaft 124 cooling fan

125 armature 127 stator 129 commutator 131 rear cover

132 screw 139 air vent 141 switch part 143 operating rod

152 Locking Mechanism 160 Power Cord 180 Locking Mechanism

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and the embodiments shown in the accompanying drawings.

As shown in Figure 1, the electric tool of the present invention includes: a main body 103, the main body 103 is mainly composed of a motor housing 105, a transmission mechanism housing 107, and a rear cover 131, and the motor housing 105 and the rear cover 131 are jointly composed It has the function of the handle part for grasping. The transmission mechanism case 107 is connected to the front end of the motor case 105. The power transmission mechanism 111 is accommodated in the transmission mechanism case 107, and is used to transmit the rotation output of the motor 121 to the grinding wheel 119. superior. In this embodiment, the electric power of the power supply is transmitted to the motor 121 by the power cord 160 to drive it. The brush is composed of a carbon brush frame; the rear cover part 131 is fixed on the motor housing 105 by screws 132, and the motor housing 105 and the rear cover part 131 together constitute the handle part 110 for the user to grasp. The handle portion 110 has a certain length in the longitudinal direction, so that the user can grasp it with two hands side by side. In addition, the rear cover portion 131 accommodates a switch portion 141, which is used to switch the power-on state (open state) and power-off state (closed state) of the motor 121, and an operating lever 143 is arranged on the switch portion 141. It is used to open and close the switch unit 141 . In addition, the operating lever 143 is provided with a locking mechanism 180 capable of preventing misoperation of the operating lever 143 . The above-mentioned operating rod 143 and the locking mechanism 180 jointly constitute the operating member in the present invention.

As shown in FIG. 2 , in the first working state of the electric tool locking mechanism 180 of the present invention, the locking column 180 f of the locking mechanism is located between the operating rod protrusion 143 c and the casing protrusion 105 c, thereby restricting the movement of the operating rod 143 .

As shown in Figure 3, in the second working state of the electric tool locking mechanism 180 of the present invention, when the position of the locking mechanism switching column 180a changes, the locking mechanism convex surface 180d cooperates with the locking mechanism concave surface 180c to make the locking mechanism locking column 180f Deviate between the convex point 143c of the operating lever and the convex point 105c of the casing, thereby canceling the locking of the operating lever 143 .

As shown in FIG. 4 , the electric tool locking mechanism 152 of the present invention includes: a self-locking pressure block 152a, a rotating shaft 152b, a pressure block buckle 152c, a spring component 153, and an engaging portion 143b. Among them, the locking mechanism 152 can adjust the movement state of the operating rod 143; when the self-locking pressure block 152a is operated by hand and rotates around the rotating shaft 152b, when the position of the engaging part 143b and the pressing block buckle 152c is reached, the operating rod 143 Locked in the on state, so that the switch part 141 is in the on state for a long time. The same operator operates the operating lever 143 to cause the engaging part 143b to leave the clamping range of the pressing block buckle 152c, and the resistance of the engaging part 143b to the pressing block buckle 152c is released. At this time, under the elastic force of the spring part 153 , the locking mechanism 152 returns to its original position.

In addition to the above-mentioned preferred embodiments, the present invention also has various specific embodiments. All technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims (8)

1. An electric tool, comprising: The power drive component motor drives the electric tool to process the workpiece; a casing for supporting the motor; A transmission mechanism, which is located at the front end of the casing, is used to transmit the power of the motor; the rear cover part, which is located at the rear end of the casing; switch, which is located on the rear side of the above-mentioned casing; The operating lever, which is located at the position of the rear cover, is characterized in that, The operating rod can move relative to the rear cover, and the movement of the operating rod is linked with the switch, and is used to control the power on and off of the above motor. 2. The power tool according to claim 1, wherein: The electric tool is provided with a locking mechanism, which can limit the movement state of the operating rod. 3. The power tool according to claim 2, wherein: The locking mechanism is provided with a convex surface, a concave surface and a locking post. 4. The power tool according to claim 3, wherein: The convex surface has multiple states so that the state of the concave surface and locking post can be controlled. 5. The electric tool according to claim 1 or 3, characterized in that, The locking post cooperates with the operating rod, and the state change of the locking post can limit the movement state of the operating rod. 6. The power tool according to claim 2, wherein: The locking mechanism is elastic. 7. The electric tool according to claim 1, characterized in that, The operating rod has a protruding point, which can cooperate with the rear cover or the casing, and the protruding point limits the moving direction of the operating rod. 8. The power tool according to claim 1, wherein: A locking mechanism is installed at the rear of the rear cover, and the locking mechanism can control the movement state of the operating rod.