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DC speed switch

A technology of DC speed-regulating switches and components, which is applied in the field of electric switches, can solve problems such as poor working reliability, damage to starting current, and short service life, and achieve the effects of small space occupation, easy installation, and extended service life

Active Publication Date: 2015-09-09
KEDU ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the problems that the contact assembly of the DC speed regulating switch in the prior art cannot be used due to a sudden failure, poor working reliability, damage due to a large starting current, and short service life. A DC speed-regulating switch with high working reliability and long service life of a contact assembly

Method used

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  • DC speed switch
  • DC speed switch
  • DC speed switch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 , figure 2 Shown is the DC speed regulating switch of this embodiment, which includes a housing, the housing is composed of a seat 12 and a cover 11, a movable frame 2 is slidably installed in the housing, and is arranged inside the housing. The contact assembly includes a moving contact part 31 and a static contact part 32, and the movable frame 2 slides down to drive the moving contact part 31 to contact the static contact part 32, so The moving frame 2 slides upward to drive the moving contact part 31 to separate from the static contact part 32, wherein the moving contact part 31 includes a moving contact 311 and a moving contact for supporting the moving contact 311. The contact frame 312, the movable contact 311 is formed with a movable contact for contacting or separating from the static contact on the static contact part 32, the movable contact frame 312 is supported in the middle of the movable contact 312 and can make The movable contact 312...

Embodiment 2

[0065] As a changeable setting method of the sliding piece 5, the sliding piece 5 and the movable frame 2 are arranged in a reverse linkage structure, that is, when the movable frame 2 slides down, it drives the sliding piece 5 to slide upward. , when the movable frame slides upward, it drives the sliding piece 5 to slide downward, and the sliding piece 5 is initially set to be connected with the static contact part 32. When the head 311 is in contact with the static contact part 32, the sliding piece 5 slides upward to leave a certain distance from the movable contact frame 312, and the movable frame 2 continues to slide downward to drive the sliding piece 5 to continue upward. After sliding for a certain distance, it finally contacts with the moving contact frame 312 to realize conduction, and the part of the sliding piece 5 in contact with the moving contact frame 312 is the auxiliary contact portion 51 of the sliding piece 5; when the When the movable frame 2 slides upward...

Embodiment 3

[0067] As another convertible mode of the sliding piece 5, the initial state of the sliding piece 5 is set to be disconnected from the moving contact frame 312 and the static contact part 32, and the sliding piece 5 is in the The movable frame 2 slides to make the movable contact 311 contact with the static contact part 32 and then move along the direction perpendicular to the axial direction of the movable frame 2 to overlap with the movable contact frame 312 and the static contact part 32. connected together to achieve conduction; after the movable frame 2 slides to separate the movable contact 311 from the static contact part 32, the sliding piece 5 moves laterally away from the static contact part 32 and the static contact part 32. The moving contact frame 312 realizes disconnection.

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PUM

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Abstract

The invention relates to a direct current speed-control switch which comprises a shell, a movable support and a contact assembly, wherein the movable support and the contact assembly are installed in the shell in a sliding mode. The contact assembly comprises a movable contact component and a fixed contact component, the movable support drives the movable contact component to be contacted with or separated from the fixed contact component in a sliding mode, and the movable contact component comprises a movable contact and a movable contact support for supporting the movable contact. The direct current speed-control switch further comprises an auxiliary contact component, when the auxiliary contact component is driven by the movable support to downwards slide to be contacted with the fixed contact component after the movable contact is contacted with the fixed contact component so as to achieve electrical connection between the movable contact support and the fixed contact component, and when the auxiliary contact component is driven by the movable support to upwards slide to be separated from the fixed contact component before the movable contact is separated from the fixed contact component to achieve electrical disconnection between the movable contact support and the fixed contact component. According to the direct current speed-control switch, the arrangement of the auxiliary contact component shares a starting current of the movable contact and the fixed contact component when the movable contact and the fixed contact component are connected, when the movable contact has sudden failures and cannot work, the auxiliary contact component can still be used for connecting or disconnecting a circuit, operational reliability is higher, and the service life of the direct current speed-control switch is long.

Description

technical field [0001] The invention relates to the field of electric switches, in particular to a DC speed regulating switch. Background technique [0002] DC speed control switches are widely used in the field of hand-held electric tools, such as electric drills, electric grinders, electric wrenches and electric screwdrivers, etc. DC speed control switches generally include a shell, a movable frame with control buttons, and a contactor controlled by the movable frame. The head assembly (including the moving contact and the static contact), the reversing mechanism used to control the steering of the motor, and the speed regulating mechanism used to adjust the speed. [0003] In addition to meeting the speed regulation function, the DC speed regulating switch should also be small in size and easy to install. Therefore, due to the limitation of the installation space, the current DC speed regulating switch generally only includes one set of contact components, that is, a set ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H13/12H01H13/02
Inventor 郑春开吴世明张志海
Owner KEDU ELECTRIC CO LTD