CN2857189Y - Switchgear - Google Patents

Abstract

A switch device includes a base, a pair of fixed contacts and terminal post disposed in the base, two movable contacts corresponding to the the both ends disposed on the fixed contacts, between the two ends another end is also provided, the base includes a upper lid which has buttons and return-spring thereon, the base comprises a push rod which contacts with the button on the upper end through the upper lid and has springs and slide bar in two holes on the lower end. The both ends of the slide bar contact with the two movable contacts. On the other end the push rod is provided with a damper and a gear engaged with the gear-rack, a linkage in the hole underside conrresponding to the movable contact on the other end, and a spring disposed between the movable contact and the ends. The advantages are: simple structure, convenient manufacture, reliable performance, good sealing, and long service life.

Description

Switching device

Technical field

The utility model relates to a kind of switching device of connecting and cutting off the electricity supply of being used to, and relates in particular to a kind of switching device that is used on the electric tools such as cutting machine.

Background technology

Traditional switching device generally includes: pedestal, be arranged on a pair of static contact in the pedestal, be arranged on the pairs of posts that the pedestal bottom side connects with two static contacts, be arranged on two movable contact springs on two static contacts, be arranged on the moving contact of movable contact spring end, be arranged in the pedestal and corresponding with two movable contact springs respectively two-terminal, be arranged in the pedestal and the terminal between two-terminal, the end of terminal is respectively arranged with fixed contact, movable contact spring is corresponding with the fixed contact of terminal ends, pedestal is provided with upper cover plate, upper cover plate is provided with button, be provided with back-moving spring between button and the upper cover plate, push rod is arranged in the draw-in groove of pedestal, and the bottom that upper cover plate and button are passed in its upper end offsets, be provided with spring between push rod and the pedestal, during use, the action by push rod can drive each movable contact spring fixed contact corresponding with it respectively and realize break-make, thereby realizes the conducting or the cut-out of switching device.Above-mentioned this switching device generally is not provided with time-delay mechanism, and therefore, some function that can influence electric tool is used, even the switching device that has also is provided with time-delay mechanism, but its structure is comparatively complicated usually, and the reliability of using is also relatively poor.

Summary of the invention

The purpose of this utility model is to provide a kind of switch auxiliary contact to have the timing closing function, and its structural design exquisiteness, and can improve the switching device of electric tool serviceability.

Further purpose of the present utility model is to provide a kind of button end to have lock function, prevents the switching device that switch unclamps when using.

Further purpose of the present utility model is to provide a kind of excellent sealing that has, and can improve the switching device of dependability.

For realizing the purpose of this utility model, a kind of switching device, comprise pedestal, be arranged on a pair of static contact in the pedestal, be arranged on the pairs of posts that the pedestal bottom side connects with two static contacts respectively, be arranged on two movable contact springs on two static contacts, be arranged on the moving contact of movable contact spring end, be arranged in the pedestal and corresponding with two movable contact springs respectively two-terminal, be arranged in the pedestal and the terminal between two-terminal, the end of terminal is respectively arranged with fixed contact, the moving contact of movable contact spring is corresponding with the fixed contact of terminal ends, pedestal is provided with upper cover plate, upper cover plate is provided with button, be provided with back-moving spring between button and the upper cover plate, push rod is arranged in the draw-in groove of pedestal, stage clip is arranged in the notch at pedestal middle part and offsets with the downside of push rod, the bottom that upper cover plate and button are passed in the upper end of push rod offsets, be provided with spring between push rod and the pedestal, be respectively arranged with spring and slide bar in two holes of described push rod downside, the end of two slide bars offsets with the side of two movable contact springs respectively, the opposite side of push rod is provided with damper, gear is arranged in the rotating shaft of damper and with tooth bar and meshes, the inboard of push rod bottom block-shaped protrusion offers aperture, one end of connecting rod is embedded in aperture, the other end is latter half of corresponding with movable contact spring, be provided with extension spring between the connector at the middle part of movable contact spring and terminal middle part, the rear end of movable contact spring is embedded in the aperture of tooth bar side.

For realizing further purpose of the present utility model, a kind of switching device, also comprise: the leading section at described button is provided with group handle by alignment pin, is provided with lap device between the bottom of group handle and the upper cover plate, is provided with spring between the bottom of button front end inside portion and group handle.

For realizing further purpose of the present utility model, a kind of switching device also comprises: the through hole that described upper cover plate engages with push rod is provided with sealing ring and seal cover.

The beneficial effects of the utility model are: this switching device reasonable in design, adopt mechanical delay device, and simple in structure, cost of manufacture is low, uses reliable; Dial between handle and button and be provided with lap device, can not unclamp automatically after switch closes, easy to use; Switch is inner good with outside sealing, can prolong the useful life of switch.

Description of drawings

Below in conjunction with accompanying drawing the utility model switching device is described in further detail:

Fig. 1 is the stereogram of the utility model switching device decomposition texture;

Fig. 2 is the stereogram after the preliminary assembling of this switching device;

When Fig. 3 disconnects for this switching device along the sectional structure chart at its middle part;

When Fig. 4 closes for this switching device along its middle part sectional structure chart;

Fig. 5 is the disconnected fashionable sectional structure chart along one side movable contact spring of this switching device;

When Fig. 6 closes for this switching device along the sectional structure chart of one side movable contact spring;

Fig. 7 is the sectional structure chart (being the tooth bar place of switching device) along A-A line among Fig. 5;

Fig. 8 is the sectional structure chart (being the tooth bar place of switching device) along C-C line among Fig. 6;

Fig. 9 is the sectional structure chart (being the connecting rod place of switching device) along B-B line among Fig. 5;

Figure 10 is the sectional structure chart (being the connecting rod place of switching device) along D-D line among Fig. 6.

Among the figure: 1, pedestal, 2, static contact, 3, binding post, 4, terminal, 5, fixed contact, 6, movable contact spring, 7, moving contact, 8, terminal, 9, push rod, 10, spring, 11, slide bar, 12, terminal, 13, damper, 14, gear, 15, movable contact spring, 16, connecting rod, 17, tooth bar, 18, extension spring, 19, stage clip, 20, upper cover plate, 21, button, 22, dial handle, 23, spring, 24, alignment pin, 25, sealing ring, 26, seal cover, 27, spring, 28, spring, 29, draw-in groove, 30, notch, 31, rotating shaft.

Embodiment

Shown in Fig. 1 to 10, a kind of switching device, comprise pedestal 1, be arranged on a pair of static contact 2 in the pedestal 1, be arranged on the pairs of posts 3 that pedestal 1 bottom side connects with two static contacts 2 respectively, be arranged on two movable contact springs 6 on two static contacts 2, be separately positioned on the moving contact 7 of two movable contact springs, 6 ends, be arranged in the pedestal 1 and corresponding with two movable contact springs 6 respectively two- terminal 4,8, be arranged in the pedestal 1 and be positioned at two-terminal 4, terminal 12 between 8, terminal 4,8,12 end is respectively arranged with fixed contact 5, the moving contact 7 of movable contact spring 15 is corresponding with the fixed contact 5 of terminal 12 ends, pedestal 1 is provided with upper cover plate 20, upper cover plate 20 is provided with button 21, be provided with back-moving spring 27 between button 21 and the upper cover plate 20, push rod 9 is arranged in the draw-in groove 29 of pedestal 1, stage clip 19 is arranged in the notch 30 at pedestal 1 middle part and offsets with the downside of push rod 9, the bottom that upper cover plate 20 and button 21 are passed in the upper end of push rod 9 offsets, be provided with spring 28 between push rod 9 and the pedestal 1, be respectively arranged with spring 10 and slide bar 11 in two holes of push rod 9 downsides, the end of two slide bars 11 offsets with the side of two movable contact springs 6 respectively, the opposite side of push rod 9 is provided with damper 13, gear 14 be arranged in the rotating shaft 31 of damper 13 and with tooth bar 17 engagements, the inboard of push rod 9 bottom block-shaped protrusion offers aperture, one end of connecting rod 16 is embedded in aperture, the other end is latter half of corresponding with movable contact spring 15, be provided with extension spring 18 between the connector at the middle part of movable contact spring 15 and terminal 4 middle parts, the rear end of movable contact spring 15 is embedded in the aperture of tooth bar 17 sides.

Leading section at described button 21 is provided with group handle 22 by alignment pin 24, is provided with lap device between the bottom of group handle 22 and the upper cover plate 20, is provided with spring 23 between the bottom of button 21 front end inside portions and group handle 22.

The through hole that described upper cover plate 20 engages with push rod 9 is provided with sealing ring 25 and seal cover 26.

When this switching device uses, shown in Fig. 3,5,7 and 9, switching device is in off-state, push rod 9 is upwards lifted by the reaction of its bottom spring 28, slide bar 11 contacts with the top of movable contact spring 6, and the moving contact 7 of movable contact spring 6 ends is thrown off respectively with the fixed contact 5 of terminal 4,8 ends, simultaneously, with push rod 9 one sides mutually the connecting rod 16 of embedding be pressed on an end of movable contact spring 15, the pulling force that the moving contact 7 of these movable contact spring 15 other ends overcomes extension spring 18 separates with the fixed contact 5 of terminal 12.At this moment, all moving contacts all separate with fixed contact, so switch is in off-state.

As Fig. 4,6, shown in 8 and 10, press the push rod 9 of switching device, push rod 9 drives movable contact spring 6 upsets by slide bar 11, make the moving contact 7 and terminal 4 of movable contact spring 6 ends, the fixed contact 5 of 8 ends contacts respectively and conducting, simultaneously, with push rod 9 one sides mutually an end of connecting rod 16 and the movable contact spring 15 of embedding break away from, this movable contact spring 15 overturns under the tension of extension spring 18, but, because an end of movable contact spring 15 is embedded in the aperture of tooth bar 17, therefore this movable contact spring 15 will be by tooth bar 17 and overcome the resistance of the damper 13 that is engaged with after could slowly move upward, and the moving contact 7 of its other end and the fixed contact 5 of terminal 12 are finally connected.At this moment, the equal conducting of all moving contacts and fixed contact is so switch is in on-state.

Claims (3)

1, a kind of switching device, comprise pedestal (1), be arranged on a pair of static contact (2) in the pedestal (1), be arranged on the pairs of posts (3) that pedestal (1) bottom side connects with two static contacts (2) respectively, be arranged on two movable contact springs (6) on two static contacts (2), be arranged on the moving contact (7) of movable contact spring (6) end, be arranged in the pedestal (1) and corresponding with two movable contact springs (6) respectively two-terminal (4,8), be arranged in the pedestal (1) and be positioned at two-terminal (4,8) terminal between (12), terminal (4,8,12) end is respectively arranged with fixed contact (5), the moving contact (7) of movable contact spring (15) is corresponding with the fixed contact (5) of terminal (12) end, pedestal (1) is provided with upper cover plate (20), upper cover plate (20) is provided with button (21), be provided with back-moving spring (27) between button (21) and the upper cover plate (20), push rod (9) is arranged in the draw-in groove (29) of pedestal (1), stage clip (19) is arranged in the notch (30) at pedestal (1) middle part and offsets with the downside of push rod (9), the bottom that upper cover plate (20) and button (21) are passed in the upper end of push rod (9) offsets, be provided with spring (28) between push rod (9) and the pedestal (1), it is characterized in that: be respectively arranged with spring (10) and slide bar (11) in two holes of described push rod (9) downside, the end of two slide bars (11) offsets with the side of two movable contact springs (6) respectively, the opposite side of push rod (9) is provided with damper (13), gear (14) is arranged on the rotating shaft (31) of damper (13) and goes up and mesh with tooth bar (17), the inboard of push rod (9) bottom block-shaped protrusion offers aperture, one end of connecting rod (16) is embedded in aperture, the other end is latter half of corresponding with movable contact spring (15), be provided with extension spring (18) between the connector at the middle part of movable contact spring (15) and terminal (4) middle part, the rear end of movable contact spring (15) is embedded in the aperture of tooth bar (17) side.

2, a kind of switching device according to claim 1, it is characterized in that: the leading section at described button (21) is provided with group handle (22) by alignment pin (24), be provided with lap device between the bottom of dialling handle (22) and the upper cover plate (20), between the bottom of button (21) front end inside portion and group handle (22), be provided with spring (23).

3, a kind of switching device according to claim 1 is characterized in that: the through hole that described upper cover plate (20) engages with push rod (9) is provided with sealing ring (25) and seal cover (26).

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