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Electric push device

A propulsion device, electric technology, applied in the direction of electromechanical devices, electric components, electrical components, etc., can solve the problems of unable to automatically restore the initial state, many failures, temperature rise and other problems, to achieve energy saving, wide range of uses, reduce temperature rise and other problems. Effect

Active Publication Date: 2010-11-17
长沙三占惯性制动有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the helix angle of the screw rod is greater than the self-locking angle, the state of the push rod after it moves outwards requires the motor to be energized for a long time, which consumes a lot of energy. Moreover, the motor will cause temperature rise and many failures due to long-term energization. Defects; when the helix angle of the screw rod is smaller than the self-locking angle, the motor needs to be reversed to meet the reciprocating work requirements of the push rod, which also has the defects of large energy consumption, temperature rise, and many faults. Moreover, once an accident In case of power failure, the initial state cannot be automatically restored when the push rod is extended

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1, see figure 1 .

[0030] The technical scheme of object of the present invention sees figure 1 , including a motor 1 and a casing 2, the casing 2 is provided with a push rod 3 that can move axially, the push rod 3 is provided with a screw 4, the push rod 3 is provided with a nut 5 that forms a threaded pair with the screw 4, and the screw The rod 4 and the nut 5 preferably adopt a ball screw and ball nut structure. The helix angle of the screw rod 4 and the nut 5 is greater than the self-locking angle. Connected to the housing 2, the inner end of the screw rod 4 is connected to the shaft of the motor 1. In this example, the motor 1 is located between the brake pair 7 and the inner end of the screw rod (4), and the inner end of the screw rod 4 is connected to the motor 1 The output shaft connection, such as figure 1 As shown, the inner end of the screw rod 4 is connected to the output shaft of the motor 1 through a coupling 10; an electromagnet 6 and a brake...

Embodiment 2

[0032] Example 2, see figure 2 .

[0033] This embodiment is based on Embodiment 1, and the structure of the brake pair 7 is deformed, figure 1 The rotary brake disc 7a and the dynamic brake disc 7b of the brake pair 7 shown in the figure are annular joint surfaces, and the rotary brake disc 7a and the dynamic brake disc 7b of the brake pair in this example are boss-type joint surfaces. Others are described in Example 1.

Embodiment 3

[0034] Example 3, see image 3 .

[0035] The difference between this example and Example 1 is that the initial position of the nut 5 on the push rod 3 is located at the outer end of the screw 4. When the motor 1 is energized and rotates, the push rod 3 shrinks inward along the screw 4 along with the nut 5. To move forward, the push rod 3 is equivalent to retracting inwardly, that is, to pull the components or mechanisms connected with the push rod; the electromagnet 6 is in a power-off state, such as figure 1 As shown, the dynamic brake disc 7b and the rotating brake disc 7a are in a combined state, that is, the braking force generated by the combination of the dynamic brake disc 7b and the rotating brake disc 7a keeps the push rod 3 outside the screw rod 4 The state after the end. Others are the same as embodiment 1.

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PUM

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Abstract

The invention discloses an electric push device, which comprises a motor (1) and a shell (2). An axially moving push rod (3) is arranged inside the shell (2); a lead screw (4) is arranged inside the push rod (3); and a helix angle of the lead screw (4) is greater than a self-locking angle. The electric push device is characterized in that: a nut (5) which forms a screw thread pair with the lead screw (4) is arranged at an inner end of the push rod (3); a supporting bearing (8) is arranged on an inner section of the lead screw (4); the inner end of the lead screw (4) is connected with an axis of the motor (1) and is provided with an electromagnet (6) and a braking pair (7); a spring (6b) which acts on a movable core (6a) is arranged in a fixed core of the electromagnet (6); the braking pair (7) comprises a rotating brake disc (7a) and a movable brake disc (7b); the rotating brake disc (7a) is connected with the axis of the motor (1); and the movable brake disc (7b) is connected with the movable core (6a) of the electromagnet (6) and can axially linearly move together with the movable core (6a).

Description

technical field [0001] The invention relates to a device for moving a pushing member or mechanism, in particular to an electric pushing device. Background technique [0002] Patent document No. CN2847660Y published on December 13, 2006 discloses "a novel electric push rod". The electric push rod is used for brakes, including a motor, an up travel switch, a down travel switch and a housing. The motor is connected to the lower end of the housing. The upper part of the housing is equipped with a push rod that can move outward, and the lower part is provided with a spring seat. The output shaft of the motor A threaded rod is connected, the inner end of the screw rod and the spring seat form a thread pair, and a compression spring is arranged on the upper part of the screw rod, and the compression spring acts on the push rod. The working process is that the rotation of the motor drives the screw to rotate, and the thread side effect is formed by the lower part of the screw and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K7/06
Inventor 谢兴云杨国平熊月华
Owner 长沙三占惯性制动有限公司
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