CN111292975A

CN111292975A - Gear reversing mechanism applied to electric tool switch

Info

Publication number: CN111292975A
Application number: CN202010201410.8A
Authority: CN
Inventors: 吴世明; 叶海浪
Original assignee: Suzhou Huazhijie Telecom Co ltd
Current assignee: Suzhou Huazhijie Telecom Co ltd
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2020-06-16

Abstract

The invention relates to a gear reversing mechanism applied to an electric tool switch, which comprises a shell, wherein an accommodating cavity is arranged in the shell, a rotating shaft is rotatably connected to the shell at one end of the accommodating cavity, a shifting handle and a swinging arm are connected to the rotating shaft, the shifting handle extends out of the shell and is used for shifting operation, the swinging arm is inserted into the accommodating cavity to swing, at least two positioning grooves are arranged on the side wall of any side of the swinging arm positioned on the swinging surface of the swinging arm, the distance between each positioning groove and the central shaft of the rotating shaft is equal, a positioning hole right opposite to any positioning groove is formed in the shell, the outer end of the positioning hole is far away from the positioning groove, a sealing cover, an elastic piece and a positioning propping piece are sequentially arranged from the outer end to the inner end of the positioning hole, one end of the positioning. The invention can realize the technical effects of larger gear shifting angle and clearer gear shifting feeling.

Description

Gear reversing mechanism applied to electric tool switch

The technical field is as follows:

the invention belongs to the technical field of electric tool switches, and particularly relates to a gear reversing mechanism applied to an electric tool switch.

Background art:

the control system of the electric tool comprises a start-stop switch, a speed regulating switch and a gear reversing mechanism, wherein the start-stop switch is used for controlling the start and stop of the electric tool, the speed regulating switch is used for regulating the rotating speed of a motor of the electric tool, and the gear reversing mechanism is used for changing the motor steering of the electric tool.

The gear reversing mechanism commonly used in the electric tool switch at present adopts a toggle type, a toggle handle is toggled to drive a swing arm to swing, and the connection mode of an elastic sheet on the swing arm and a metal foil on a PCB (printed circuit board) is adjusted, so that the motor steering is changed, because the toggle handle can be toggled, in order to avoid the accidental toggling of the toggle handle in the operation process of the motor, the gear reversing mechanism also comprises a swing arm positioning device, for example, the gear reversing mechanism disclosed by the invention patent ZL201610779856.2, the swing arm and the swing arm positioning device are arranged along the radial direction of a rotating shaft, the end part of the swing arm is provided with a plurality of positioning grooves, the swing arm positioning device is elastically provided with steel balls, and the swing arm swings to enable the steel balls to be clamped into different positioning grooves to realize the. Under the limited circumstances of switch inner space, this kind of structure directly leads to shortening of swing arm length, and swing arm length shortens the swing arc length that direct influence swing arm kept away from pivot one end and reduces, and less swing arc length makes the interval less between the constant head tank that sets up on the swing arm, dials the handle when commuting, jumps the shelves easily, consequently has inconvenient, the technical problem of maloperation in the operation.

The invention content is as follows:

the invention firstly solves the technical problems that: the gear reversing mechanism applied to the electric tool switch is larger in gear shifting angle and clearer in gear shifting feeling.

In order to solve the technical problems, the invention adopts the technical scheme that: be applied to gear reversing mechanism of electric tool switch, including the casing, the inside holding chamber that is provided with of casing, rotate on the casing of holding chamber one end and be connected with a pivot, be connected with in the pivot and dial handle and swing arm, dial the handle and stretch out the casing and be used for stirring the operation outward, the swing arm inserts the holding intracavity and realizes the swing, the swing arm is located and is provided with two at least constant head tanks on the arbitrary one side lateral wall of its swing face, and each constant head tank equals to the distance of pivot center pin, set up one on the casing with arbitrary constant head tank just right locating hole, the constant head tank is kept away from to the locating hole outer end, and the locating hole has set gradually closing cap, elastic component and location top piece from the outer end to the inner, and the elastic component's elasticity is impressed in.

As a preferred scheme, constant head tank quantity is three, and every constant head tank all becomes hemisphere pit or fill shape pit or rectangle pit, the closing cap inserts in the locating hole, with locating hole inner wall threaded connection or splice or lean on the frictional force joint, the elastic component is spring or rubber, the tight piece of location top can be the post spare that ball or at least one end are the sphere.

As a preferred scheme, the shell comprises a base and an upper cover, the positioning hole is formed in the side wall of the base, a baffle is arranged on the edge of the upper cover, the upper cover is connected with the base in an opposite mode, and the baffle is attached to the outer side wall of the base and covers the positioning hole.

Preferably, a contact elastic sheet is arranged on any side wall of the swing arm in the swing direction of the swing arm and used for being in contact with or disconnected from a contact terminal arranged inside the shell so as to switch the motor to turn.

As a preferred scheme, the positioning groove is formed in one end, far away from the rotating shaft, of the swing arm.

The invention has the beneficial effects that: according to the gear reversing mechanism, the positioning grooves are formed in the side wall of the swing arm, which is located on any side of the swing surface of the swing arm, the positioning propping piece, the elastic piece and the sealing cover are arranged on the shell, the swing arm is positioned through the matching of the positioning propping piece arranged on the shell and the positioning grooves, and the positioning propping piece is transferred from one positioning groove to another positioning groove through the swinging of the swing arm to realize gear switching.

Description of the drawings:

the following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:

FIG. 1 is an exploded view of the gear shift reversing mechanism of the present invention;

fig. 2 is a sectional view showing an assembled state of the shift position changeover mechanism of the present invention.

In fig. 1 and 2: 1. the device comprises a shell, 101, a base, 102, an upper cover, 103, a baffle, 2, an accommodating cavity, 3, a rotating shaft, 4, a shifting handle, 5, a swinging arm, 6, a positioning groove, 7, a positioning hole, 8, a sealing cover, 9, an elastic piece, 10, a positioning propping piece, 11 and a contact elastic piece.

The specific implementation mode is as follows:

specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the gear reversing mechanism applied to the switch of the electric tool comprises a housing 1, a housing cavity 2 is arranged inside the housing 1, a rotating shaft 3 is rotatably connected to the housing 1 at one end of the housing cavity 2, a shifting handle 4 and a swing arm 5 which extend along the radial direction of the rotating shaft 3 are connected to the rotating shaft 3, the shifting handle 4 extends out of the housing 1 for shifting operation, the swing arm 5 is inserted into the housing cavity 2 to swing, at least two positioning slots 6 are arranged on the side wall of any side of the swing arm 5 on the swing surface, the distance from each positioning slot 6 to the central axis of the rotating shaft 3 is equal, a positioning hole 7 which is right opposite to any positioning slot 6 is arranged on the housing 1, the outer end of the positioning hole 7 is far away from the positioning slot 6, a sealing cover 8, an elastic member 9 and a positioning propping member 10 are sequentially arranged from the outer end to the inner end of the, the end of the positioning top member pressed into the positioning groove 6 is spherical.

In this embodiment, the number of the positioning grooves 6 is three, each positioning groove 6 is a hemispherical pit, a bucket-shaped pit or a rectangular pit, preferably a hemispherical pit, the sealing cover 8 is inserted into the positioning hole 7 and is in threaded connection or glued connection or clamped connection by friction with the inner wall of the positioning hole 7, preferably in threaded connection in this embodiment, the elastic member 9 is a spring or rubber, preferably a spring; the positioning top member 10 may be a ball or a post having at least one spherical end, preferably a ball in this embodiment, and more preferably a round steel ball.

As shown in fig. 1, the housing 1 includes a base 101 and an upper cover 102, the positioning hole 7 is formed in a side wall of the base 101, a baffle 103 is disposed at an edge of the upper cover 102, the upper cover 102 and the base 101 are connected in an involutory manner, the baffle 103 is attached to an outer side wall of the base 101 and covers the positioning hole 7, so as to prevent the sealing cover 8 from falling off, improve the aesthetic property, and improve the dustproof grade.

And a contact elastic sheet 11 is arranged on any side wall of the swing arm 5 in the swing direction and is used for being in contact with or disconnected from a contact terminal arranged inside the shell 1 so as to switch the motor to turn. In this embodiment, the contact spring 11 is disposed on any side wall of the swing arm 5 in the swing direction, and when the swing arm swings, the contact spring 11 is close to or away from the contact terminal, and when the contact spring 11 is overlapped with the contact terminal, the motor is in a forward rotation state, and when the contact spring 11 is separated from the contact terminal, the motor is in a reverse rotation state.

The locating slot 6 is arranged at one end of the swing arm 5 far away from the rotating shaft 3, and the distance between the locating slots 6 is enlarged as much as possible, so that the gear shifting angle is larger, and the gear shifting feeling is clearer.

The working process of the invention is as follows: as shown in fig. 1 and fig. 2, first, as shown in fig. 2, the gear reversing mechanism is installed, so that the positioning propping member 10 is inserted into any one of the positioning grooves 6, then, as shown in fig. 1, the dial grip 4 is manually dialed to the right side of fig. 1, when the dial grip 4 is dialed, the swing arm 5 swings leftward therewith, and when the swing arm 5 swings, the positioning groove 6 is driven to move relative to the positioning propping member 10, so that the positioning propping member 10 moves from one positioning groove 6 to another positioning groove 6 adjacent to the right side thereof, so as to implement one-time gear shifting, when the positioning propping member 10 moves into the rightmost positioning groove 6, the amplitude of leftward swing of the swing arm 5 is the maximum, at this time, the contact spring plate 11 contacts with the contact terminal, so that.

When the motor that needs to be switched over turns to, operating personnel reverse stir and dial handle 4, make swing arm 5 swing right, as long as swing arm 5 swings a gear right, contact shell fragment 11 promptly with the contact terminal disconnection, the motor just can realize the reversal this moment, further reverse stir dial handle 4 enable location top piece 10 insert in leftmost constant head tank 6, contact shell fragment 11 is furthest from the contact terminal this moment, but the motor still is in the reversal state.

Although three positioning grooves 6 are provided in the embodiment, in actual use, only two positioning grooves 6 may be provided, and the technical effect to be achieved by the present invention can be fully achieved.

The above embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments in use, and are not intended to limit the invention; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.

Claims

1. Be applied to gear reversing mechanism of electric tool switch, including casing (1), casing (1) inside is provided with holding chamber (2), rotates on casing (1) of holding chamber (2) one end and is connected with a pivot (3), is connected with on pivot (3) and dials handle (4) and swing arm (5), dials handle (4) and stretches out casing (1) external use and be used for stirring the operation, swing arm (5) insert and realize the swing in holding chamber (2), a serial communication port, swing arm (5) are located and are provided with two at least constant head tanks (6) on the arbitrary lateral wall of one side of its swing face, and the distance of each constant head tank (6) to pivot (3) center pin equals, set up one on casing (1) and arbitrary constant head tank (6) just right locating hole (7), constant head tank (6) are kept away from locating hole (7) outer end, and locating hole (7) have set gradually closing cap (8) from outer end to, The elastic part (9) and the positioning and propping part (10), one end of the positioning and propping part (10) is pressed into the positioning groove (6) by the elastic force of the elastic part (9), and the end part of the positioning and propping part pressed into the positioning groove (6) is spherical.

2. The gear reversing mechanism applied to the electric tool switch is characterized in that the number of the positioning grooves (6) is three, each positioning groove (6) is a hemispherical pit or a bucket-shaped pit or a rectangular pit, the sealing cover (8) is inserted into the positioning hole (7) and is in threaded connection or glued connection or clamped connection by friction with the inner wall of the positioning hole (7), the elastic piece (9) is a spring or rubber, and the positioning top piece (10) can be a ball or a column piece with at least one spherical end.

3. The gear reversing mechanism applied to the electric tool switch is characterized in that the shell (1) comprises a base (101) and an upper cover (102), the positioning hole (7) is formed in the side wall of the base (101), a baffle (103) is arranged on the edge of the upper cover (102), the upper cover (102) is connected with the base (101) in an involutory mode, and the baffle (103) is attached to the outer side wall of the base (101) and covers the positioning hole (7).

4. The gear reversing mechanism applied to the electric tool switch is characterized in that a contact elastic sheet (11) is arranged on any side wall of the swing arm (5) in the swing direction and is used for being in contact with or disconnected from a contact terminal arranged inside the shell (1) to switch the motor to rotate.

5. Gear shift change mechanism for electric tool switch according to claim 1, characterized in that the positioning slot (6) is provided at the end of the swing arm (5) away from the spindle (3).