CN217224974U

CN217224974U - Electric tool

Info

Publication number: CN217224974U
Application number: CN202220526537.1U
Authority: CN
Inventors: 不公告发明人
Original assignee: Kewei Technology Nantong Co ltd
Current assignee: Kewei Technology Nantong Co ltd
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2022-08-19
Anticipated expiration: 2032-03-11

Abstract

The utility model relates to an electric tool, including being provided with the casing, assembling in the trigger mechanism, the switch of casing, the trigger mechanism includes main part, unlocks the portion, connecting rod and sticking department, and the main part has the operation portion of pressing, and the connecting rod is acceptd in the operation portion of pressing, and unlocks the portion and the sticking department articulates the both ends of connecting rod respectively, and unlocks the portion and the sticking department articulates the operation portion of pressing respectively, unlocks the portion and can pivot between latched position and unblock position; when the unlocking part is positioned at the locking position, the locking part limits the pressing operation part to move towards one side of the switch, and when the unlocking part is positioned at the unlocking position, the operation limitation on the pressing operation part is released, so that the switch trigger in the pressing operation part can trigger the switch to start. The electric tool with the trigger mechanism can eliminate the possibility of false triggering of the switch caused by factors such as elastic deformation of the trigger without adding an additional safe electronic switch device or arranging a special reinforcing part, and the service life of the trigger mechanism is prolonged.

Description

Electric tool

Technical Field

The present application relates to the field of power tools, and more particularly, to power tools having a trigger mechanism.

Background

In an electric power tool, such as an angle grinder, a switch housed in a housing is turned on by pressing an operation member such as a trigger mechanism provided in the housing, and a motor is driven. A lock release member is usually provided in the trigger mechanism, and the trigger mechanism is prevented from being pressed by abutting the lock release member against the housing, so that the off state of the switch is maintained, and the trigger mechanism is not accidentally pressed to trigger the on switch. When using the electric power tool, the operator first needs to move the lock release member to a position where the lock release member does not interfere with the housing, and then presses the trigger mechanism to activate the switch to start the motor.

However, since the trigger mechanism is long, the trigger mechanism may be bent after being pressed several times, and the trigger mechanism can be pressed to turn on the switch without being unlocked by the lock release member. Therefore, there is a need for an improved trigger mechanism that increases the strength of the trigger mechanism to prevent the trigger mechanism from bending and causing false triggering.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an electric tool, this electric tool's trigger mechanism can avoid leading to the condition of spurious triggering because of the bending.

The electric tool comprises a shell, a trigger mechanism assembled on the shell, a switch and a switch trigger piece for triggering the switch, wherein the trigger mechanism comprises:

a main body part having a pressing operation part provided with an accommodation groove in which the switch trigger is disposed;

an unlocking portion hingedly connected to the pressing operation portion, the unlocking portion being pivotable between a locked position and an unlocked position;

the connecting rod is arranged in the containing groove of the pressing operation part, the connecting rod is provided with a first hinged end and a second hinged end, the first hinged end of the connecting rod is hinged with the unlocking part, the connecting rod is provided with a through hole positioned between the first hinged end and the second hinged end, and the switch trigger piece penetrates through the through hole of the connecting rod;

a locking portion hingedly connected to the pressing operation portion, the locking portion being hingedly connected to a second hinge end of the link;

the unlocking unit restricts operation of the pressing operation unit when located at the lock position, and releases operation restriction on the pressing operation unit when located at the unlock position.

Further, when the unlocking portion is located at the lock position, the lock portion prevents the pressing operation portion from moving toward the switch direction.

Further, when the unlocking part is located at the locking position, the locking part is abutted against the housing; when the unlocking part is located at the unlocking position, the unlocking part and the locking part are separated from the shell.

Further, when the electric tool is horizontally placed and the unlocking part is located at the locking position, the second hinged end of the connecting rod is higher than the first hinged end; when the unlocking part is located at the unlocking position, the first hinged end of the connecting rod is higher than the second hinged end.

Further, the through hole of the link has a first section extending in a horizontal direction toward the first hinge end, and a second section extending toward the second hinge end, the first section and the second section communicating with each other.

Further, when the unlocking part is located at the locking position, the switch trigger part is located at least partially at the first section of the through hole of the connecting rod, and when the unlocking part is located at the unlocking position, the switch trigger part is located at least partially at the second section of the through hole of the connecting rod.

Furthermore, the pressing operation part is also provided with a through hole, and when the unlocking part is positioned at the locking position, at least part of the unlocking part penetrates through the through hole and protrudes out of the pressing operation part.

Furthermore, the unlocking part is hinged to the pressing operation part through a pin shaft, and a torsion spring is arranged on the pin shaft.

Further, a pivot shaft is arranged at one end, away from the pressing operation part, of the main body part, the main body part is connected to the shell through the pivot shaft, and the main body part can pivot by taking the pivot shaft as a rotation center.

Further, an elastic member is disposed between the main body portion and the housing.

Advantageous effects

The trigger mechanism in the electric tool can synchronously move through the connecting rod linked with the unlocking part and the locking part linked with the connecting rod so as to realize the switching between the locking position and the unlocking position of the trigger mechanism. When the unlocking part is located at the locking position, the unlocking part and the locking part can be simultaneously abutted to the shell to limit the movement of the trigger, the strength of the trigger is enhanced, and the condition that the trigger mechanism is bent due to excessive use times so as to trigger the switch by mistake is prevented.

Drawings

Fig. 1 is a schematic view of an electric tool according to an embodiment of the present invention;

fig. 2 is an internal schematic view of an unlocking part in a locked position according to an embodiment of the present invention;

fig. 3 is an internal schematic view of an unlocking portion in an unlocked position according to an embodiment of the present invention;

fig. 4 is an internal schematic view of the trigger switch in the embodiment of the present invention in which the pressing operation part is pressed;

FIG. 5 is a schematic view of a trigger mechanism in an embodiment of the invention;

fig. 6 is a schematic connection diagram of the unlocking portion, the connecting rod and the locking portion in the embodiment of the present invention.

A power tool-100; a shell body-1; a switch-11; a barrier rib plate-12; an angle grinder head-2; a battery pack-3; trigger mechanism-4; a main body portion-40; pivot axis-401; a pressing operation part-41; an accommodating groove-410; switch activating member-411; a through-hole-412; a front sidewall-4121; -413 an upper surface; lower surface-414; an elastic member-42;

an unlocking portion-43; a recess-430; a first pin-431; a torsion spring-432; -433 on the upper end face; a toggle key-434; front end-4341; rear arc surface-4342; a connecting bond-435;

a connecting rod-44; a first hinged end-441; wings-4410, 4411; a second pin-4412; a second hinged end-442; a third pin-4421; connecting section-443; -444 through-hole; first stage-4441; second stage-4442;

a locking portion-45; sector-450, 451; first end-4511; second end face-4512; fourth pin shaft-452.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless defined otherwise, technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. As used in this application, the terms "first," "second," and the like do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

The utility model relates to an electric tool, be angle mill in this embodiment. As shown in FIG. 1, the angle grinder comprises a housing 1 formed by assembling a left half shell and a right half shell, wherein a switch 11, a motor and other devices are arranged in the housing 1. The housing 1 is also used as a grip for holding. The straight line where the axis of the shell 1 is located is taken as the front-back direction, the angle grinder head 2 is arranged in front of the shell 1, and the motor in the shell 1 is used for driving the angle grinder head 2. A battery pack 3 is arranged behind the housing 1, and the battery pack 3 is used for supplying power to the motor. The vertical direction perpendicular to the axial direction of the housing 1 is the vertical direction, and the straight line perpendicular to the front-rear direction and the vertical direction is the horizontal direction. A trigger mechanism 4 is provided below the housing 1. The trigger mechanism 4 is used to activate the angle grinder.

In the present embodiment, as shown in fig. 2, the trigger mechanism 4 includes a main body portion 40. The main body 40 has a pressing operation portion 41 extending in the front-rear direction. The pressing operation portion 41 is pressed by a user to activate the switch 11 to start the angle grinder. The pressing operation part 41 is arranged at the rear direction of the main body part 40, a pivot shaft 401 is arranged at the front end of the main body part 40 far away from the pressing operation part 41, and two ends of the pivot shaft 401 are respectively hinged on the left half shell and the right half shell. Thus, the main body portion 40 is connected to the housing 1 through the pivot shaft 401, and the main body portion 40 can pivot with the pivot shaft 401 as a rotation center, so that the main body portion 40 can rotate in the up-down direction within a certain range.

As shown in fig. 2 and 5, the pressing operation portion 41 is provided with a receiving groove 410, and a switch trigger 411 is provided in the receiving groove 410. The switch trigger 411 is formed to extend upward from the bottom of the pressing operation portion 41. The main body portion 40 rotates about the pivot shaft 401, so that the pressing operation portion 41 moves toward the switch 11, thereby enabling the switch trigger 411 to trigger the switch 11.

The trigger mechanism 4 further includes an unlocking portion 43, a link 44, and a locking portion 45. The unlocking portion 43 is hingedly connected to the pressing operation portion 41, and the unlocking portion 43 is pivotable between a locking position and an unlocking position.

The connecting rod 44 is disposed in the receiving groove 410 of the pressing operation portion 41, the connecting rod 44 has a first hinge end and a second hinge end, the first hinge end of the connecting rod 44 is hinged to the unlocking portion 43, and the second hinge end is hinged to the locking portion 45. The link 44 has a through hole 444 between the first and second hinge ends, and the switch activating member 411 passes through the through hole 444 of the link 44. The locking portion 45 is also hingedly connected to the pressing operation portion 41.

When the unlocking unit 43 is in the locked position, the operation of the pressing operation unit 41 is restricted, and the switch trigger 411 cannot touch the switch 11. When the unlocking unit 43 is located at the unlocking position, the operation restriction on the pressing operation unit 41 is released, and the pressing operation unit 41 is operated so that the start switch 11 is triggered by the switch trigger 411.

As shown in fig. 6, the unlocking portion 43, the link 44 and the locking portion 45 in the trigger mechanism 4 form an interlocking structure, the unlocking portion 43 can pivot to drive the link 44 to rotate, and the link 44 can drive the locking portion 45 to rotate. When the unlocking portion 43 is located at the lock position, the unlocking portion 43 and the lock portion 45 simultaneously contact the housing 1, and the pressing operation portion 41 cannot be pressed. That is, the lock portion 45 prevents the push operation portion 41 from moving toward the switch 11, so that the switch trigger 411 cannot trigger the start switch 11, and at this time, the angle grinder cannot be started.

When the unlocking portion 43 is located at the unlocking position, as shown in fig. 2, the unlocking portion 43 and the locking portion 45 are disengaged from the housing 1, so that the pressing operation portion 41 can be pressed. Therefore, the pressing operation part 41 can be pressed to move towards one side of the switch 11, the switch trigger 411 is driven to trigger the starting switch 11, and the angle grinder can be started at the moment.

In the trigger mechanism 4, the linkage structure formed by the unlocking piece, the connecting rod 44 and the locking part 45 has the unlocking part 43 and the locking part 45 which are simultaneously abutted against the shell 1 to limit the movement of the pressing operation part 41 when the trigger mechanism is locked, and in addition, the connecting rod 44 can strengthen the strength of the pressing operation part 41, so that the electric tool with the trigger mechanism 4 can avoid the condition that the switch 11 is triggered and started by mistake due to the factors such as elastic deformation of the trigger mechanism and the like without adding an additional safety electronic switch device or arranging a special reinforcing part.

Specifically, a blocking rib plate 12 is arranged in the shell 1. The pressing operation portion 41 is further provided with a through hole 412 near the pivot shaft 401, and the unlocking portion 43 can be partially accommodated in the through hole 412. The unlocking portion 43 has a groove 430 therein, two side walls forming the groove 430 have a first pin 431 hole respectively, and the first pin 431 penetrates through the first pin 431 hole to connect the unlocking portion 43 to the pressing operation portion 41 in a hinged manner. A torsion spring 432 is disposed on the first pin 431 to facilitate the resetting of the unlocking portion 43. The first pin 431 has an upper end surface 433 above the hole and a toggle key 434 below the hole.

The unlocking portion 43 also has a connection key 435 at the rear. When the unlocking portion 43 is in the locked position, the upper end surface 433 of the unlocking portion 43 protrudes from the upper surface 413 of the pressing operation portion 41, and the toggle key 434 of the unlocking portion 43 protrudes from the through hole 412 to protrude from the lower surface 414 of the pressing operation portion 41. At this time, the upper end surface 433 of the unlocking portion 43 abuts against the stopper rib 12 in the housing 1 to restrict the movement of the pressing operation portion 41.

The toggle key 434 of the unlocking part 43 has a front end surface 4341 and a rear arc surface 4342 in the front-rear direction. The through hole 412 of the pressing operation portion 41 has a front wall 4121 in the front-rear direction. When the unlocking portion 43 is located at the locked position, the front end surface 4341 of the toggle key 434 abuts against the front side wall 4121 of the through hole 412 to limit the forward pivoting range of the unlocking portion 43, and the upper end surface 433 of the unlocking portion 43 is kept in abutment against the stopper rib 12 of the housing 1.

As shown in fig. 5 and 6, the connecting rod 44 has a first hinge end 441 hinged to the unlocking portion 43, a second hinge end 442 hinged to the locking portion 45, and a connecting section 443 connecting the first hinge end 441 and the second hinge end 442, and the connecting section 443 has a through hole 444 to avoid the switch activating member 411. The first hinged end 441 of the connecting rod 44 has two

wings

4410, 4411, the connecting key 435 of the unlocking part 43 extends between the two

wings

4410, 4411 of the first hinged end 441, and the connecting key 435 and the two

wings

4410, 4411 are respectively provided with a pin shaft hole. The second pin 4412 is sequentially inserted through the pin holes of the

wings

4410 and 4411 of the first hinge end 441 and the connecting key 435 of the unlocking part 43 to connect the unlocking part 43 and the connecting rod 44.

The second hinge end 442 of the link 44 is hinge-connected to the locking part 45 by a third pin 4421. In this embodiment, the second hinged end 442 of the link 44 is rearward and above the first hinged end 441. I.e., angle grinder 100 is horizontally positioned, when the unlocking portion 43 is in the locking position, the second hinge end 442 of the connecting rod 44 is higher than the first hinge end 441. When the unlocking portion 43 is located at the unlocking position, the connecting rod 44 is moved by the clockwise pivoting of the unlocking portion 43, so that the first hinge end 441 of the connecting rod 44 is higher than the second hinge end 442. The through hole 444 of the link 44 has a first section 4441 extending in a horizontal direction toward the first hinge end 441 and a second section 4442 extending toward the second hinge end, the first section 4441 and the second section 4442 communicating with each other.

The lock portion 45 is hinged to the pressing operation portion 41 by a fourth pin 452, and the lock portion 45 can rotate about the fourth pin 452. The locking portion 45 has two identical and

parallel fan portions

450, 451, and the second hinged end 442 of the link 44 is inserted between the two

fan portions

450, 451. The two

sectors

450 and 451 of the locking part 45 and the second hinged end 442 of the connecting rod 44 are respectively provided with a pin shaft hole, and the third pin 4421 passes through the

sectors

450 and 451 of the locking part 45 and the second hinged end 442 in sequence to realize the hinged connection of the connecting rod 44 and the locking part 45. The two

sectors

450, 451 have a first end face 4511 that can abut against the blocking rib 12 of the housing 1, and a second end face 4512 that can escape from the housing 1.

When the unlocking portion 43 is located at the locking position, the first hinged end 441 of the link 44 and the first section 4441 of the through hole 444 are received in the receiving slot 410 of the pressing operation portion 41, and the switch trigger 411 at least partially passes through the first section 4441 of the through hole 444 of the link 44. At this time, the upper end surface 433 of the unlocking part 43 and the first end surface 4511 of the locking part 45 abut against the stopper rib plate 12 of the housing 1 at the same time, and therefore, the movement of the pressing operation part 41 can be restricted, so that the switch trigger 411 cannot trigger the switch 11.

When the unlocking portion 43 is transitioned from the locking position to the unlocking position, the toggle key 434 of the unlocking portion 43 only needs to be toggled in the rearward direction. The unlocking portion 43 rotates clockwise around the first pin 431, so that the toggle key 434 and the upper end surface 433 of the unlocking portion 43 are both accommodated in the through hole 412 of the pressing operation portion 41, the connecting key 435 of the unlocking portion 43 rotates from the rear to the upper side, and the connecting rod 44 hinged to the connecting rod 44 and the locking portion 45 hinged to the connecting rod 44 are driven to move. The locking portion 45 rotates about the fourth pin shaft 452 until the second end face 4512 faces upward.

When the unlocking portion 43 is located at the unlocking position, as shown in fig. 3, the second hinged end 442 of the connecting rod 44 and the second section 4442 of the through hole 444 are received in the receiving groove 410 of the pressing operation portion 41, and the switch trigger 411 at least partially passes through the second section 4442 of the through hole 444 of the connecting rod 44. At this time, the upper end surface 433 of the unlocking portion 43 is accommodated in the through hole 412 of the pressing operation portion 41, and the first end surface 4511 of the locking portion 45 faces the accommodation groove 410 of the pressing operation portion 41. As shown in fig. 4, the connection key 435 of the unlocking portion 43, the link 44, and the second end face 4512 of the locking portion 45 can be retracted from the housing 1, and the pressing operation portion 41 and the housing 1 have a space in the vertical direction, so that the user can press the pressing operation portion 41, so that the pressing operation portion 41 rotates around the pivot shaft 401, and the switch trigger 411 is driven to move upward to trigger the switch 11.

An elastic member 42, in this embodiment a spring, is disposed between the main body 40 and the housing 1. When the user operates the pressing operation part 41, the switch trigger 411 needs to be triggered to the switch 11 against the elastic force of the elastic member 42, and when the user releases the force applied to the pressing operation part 41, the pressing operation part 41 can be automatically reset, thereby turning off the switch 11.

Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.

Claims

1. An electric power tool comprising a housing, a trigger mechanism assembled to the housing, a switch, and a switch activating member activating the switch, the trigger mechanism comprising:

a main body portion having a pressing operation portion provided with an accommodation groove in which the switch trigger is disposed;

a locking portion that is hingedly connected to the pressing operation portion and that is hingedly connected to a second hinge end of the link;

2. The electric power tool according to claim 1, wherein the lock portion prevents the pressing operation portion from moving toward the switch direction when the unlocking portion is located at the lock position.

3. The power tool of claim 1, wherein the locking portion abuts the housing when the unlocking portion is in the locking position; when the unlocking part is located at the unlocking position, the unlocking part and the locking part are separated from the shell.

4. The power tool of claim 1, wherein when the power tool is horizontally positioned, the second hinged end of the link is higher than the first hinged end when the unlocking portion is in the locked position; the first hinged end of the link is higher than the second hinged end when the unlocking portion is in the unlocking position.

5. The power tool of claim 4, wherein the through bore of the link has a first section extending horizontally toward the first hinge end and a second section extending toward the second hinge end, the first and second sections communicating.

6. The power tool of claim 5, wherein the switch trigger is at least partially located in a first section of the through bore of the linkage when the unlocking portion is in the locked position, and the switch trigger is at least partially located in a second section of the through bore of the linkage when the unlocking portion is in the unlocked position.

7. The electric power tool according to claim 1, wherein the pressing operation portion is further provided with a through hole, and when the unlocking portion is located at the locking position, at least a part of the unlocking portion passes through the through hole and protrudes from the pressing operation portion.

8. The electric power tool according to claim 1, wherein the unlocking portion is hinged to the pressing operation portion by a pin on which a torsion spring is provided.

9. The electric power tool according to claim 1, wherein an end of the main body portion remote from the pressing operation portion is provided with a pivot shaft, the main body portion being connected to the housing through the pivot shaft, the main body portion being pivotable with the pivot shaft as a rotation center.

10. The power tool of claim 1, wherein a resilient member is disposed between the body portion and the housing.