Traction motor

Abstract

The invention provides a drag motor, wherein its gear box is singly composed the upper and lower cases and its synchro motor is fixed outside the cases. It designs a pit on the upper case and a through hole in the pit, sets a positioning-holed cover plate corresponding to the pit, wherein the pit is used to install the drag component linked with the exterior, and the cover plate is used to fix one end of the output gear shaft. It is applied to the environmental protection, domestic appliances and also small-sized clutch.

Description

technical field [0001] The invention relates to a traction motor, which belongs to the field of automatic switch control, and is used for automatically controlling the opening and closing of air / water valves, clutches, etc., especially suitable for automatic control of water / air valves in the environmental protection industry, and solves the There are many valves, the opening force of the valve is large, and it can only be controlled manually. At the same time, it can also be applied to the household appliance industry such as the automatic opening of the drain valve of the fully automatic washing machine and the automatic control of the clutch. technical background [0002] At present, traction motors (also known as drainage tractors) on the market generally have two structures. The first structure is shown in Figure 1. The gear box is composed of upper and lower shells. There is a central fixing frame inside the box. Below the fixed frame, that is, a synchronous motor is i...

AI Technical Summary

Problems solved by technology

The disadvantages of the traction motor with this structure are: 1) One end of the gear shaft is fixed on the pole plate of the synchronous motor. This method of fixing the shaft increases the difficulty of manufacturing the synchronous motor. on the frame, and the fixed frame itself is fixed only by the periphery being clamped in the inner wall groove of the upper and lower shells. In addition, the synchronous motor is only fixed by the bottom of the lower shell, which is equivalent to the motor and the running The gear assembly is suspended in the middle of the housing. When the output torque is generated, the entire motor will move or deform slightly. Due to the deformation, the gear gap will cause uneven and unstable states during operation; 2) The output gear that generates the output force passes through the output The shaft is transmitted to the upper part of the central fixed frame, which drives the rack to translate in a straight line to generate traction. One end of the output shaft is also on the motor plate, and the other end passes through the central fixed frame and runs directly in a counterbore of the upper shell. Due to the influence of errors, the coaxial accuracy of the output shaft is difficult to control; 3) The upright installation of the electromagnetic suction iron will also cause the phenomenon that the brake damping block gear cannot be blocked due to the slight movement and deformation of the motor, causing the traction motor to pull halfway and slip go back

The disadvantage of this kind of traction motor is that the structure is complex. The magnetic ring, copper ring, and tension spring that replace the electromagnetic iron-absorbing part have a force ratio relationship that is difficult to control, and the quality is extremely unstable. Due to the high manufacturing difficulty, it increases manpower. resources and equipment resources, so it also increases the cost of the product; in addition, the output shaft and concentricity of this traction motor are designed to be fixed on a mounting bracket, which affects the concentricity of the shaft, and at the same time increases an installation. The cost of the bracket

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