CN201315515Y - Motor with improved rear end cover bearing seat - Google Patents

Abstract

The utility model discloses a motor with improved rear end cover bearing seat, comprising a shell which is provided with a rear end cover. The rear end cover is provided with a bearing chamber in which a bearing is arranged. The bearing is connected with the rotation axis. The inner wall of the bearing chamber is provided with a radial O-ring groove which is provided with an O-ring inside. The outer wall of the bearing is closely connected with the O-ring. The utility model arranges an O-ring in the bearing chamber of the rear end cover, with good tightness. A groove is opened on the bearing chamber 3. The utility model has the advantages of simple processing technology and low cost.

Description

A kind of motor that improves rear cap bearing support construction

Technical field

The utility model relates to a kind of motor technology, particularly a kind of motor that improves rear cap bearing support construction.

Background technology

The bearing of conventional motors and the design of rear end cap are as shown in Figure 1, it cooperates is interference fits, the inwall slyness of the bearing chamber 3 on the rear end cap 2, owing to be subjected to the influence of machining apparatus precision and bearing outside diameter dimensional tolerance, when causing practical set, bearing and end cap are loose fit, have caused following several phenomenon that influences product quality:

1, sealing is poor, and water and dust are easy to scurry into motor internal from the gap of bearing and end cap.

Skid when 2, bearing and end cap rotate, cause that the vibration of motor and noise increase, especially when the motor feels hot, more serious.

3, motor shaft extension play and quicken bearing wear and cause the rotor shifting noise.

Above situation has had a strong impact on motor quality, and class can't improve, and finally causes the shortening of electrical machinery life.

In addition, also have the part motor be adopt the mode that sealing ring is set on the bearing make it and the inwall of bearing chamber between be tightly connected, still, the requirement on machining accuracy height of this structure on bearing, be difficult to carry out or cost higher,

Summary of the invention

In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of bearing pedestal favorable sealing property, long service life, novel motor that noise is low.

The technical scheme that the utility model adopted is:

A kind of motor that improves rear cap bearing support construction, comprise casing, rear end cap is installed on the casing, bearing chamber is arranged on the rear end cap, bearing is installed in the bearing chamber, and bearing is connected with rotating shaft, and the inwall of described bearing chamber is provided with radially O type circle hole groove, be provided with O type circle in the groove of hole, the outer wall of bearing and O type circle are closely contacted with.

The beneficial effects of the utility model are: at the built-in RUBBER O type of the rear end cap bearing chamber coil apparatus of motor, it has reached following three kinds of purposes.

1, eliminates the gap of bearing and rear end cap, made water and dust can't scurry into motor internal, had good sealing.

2, certain stiction is arranged between rear end cap and bearing,, also can't produce skidding even the motor feels hot when serious.

3, suitable pretightning force is arranged between rear end cap and bearing, lowered the noise that the rotor axial play causes, improved bearing life simultaneously.

4, on bearing chamber, offer radially O type circle hole groove, simple, the realization easily of processing technology, the precision that need not increase machining apparatus can have excellent sealing performance.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the structural representation of the rear end cap of existing motor;

Fig. 2 is the structural representation of the rear cap bearing support of the utility model motor;

Fig. 3 is the rear end cap structural representation of the utility model motor.

Embodiment

With reference to Fig. 2, Fig. 3, a kind of motor that improves rear cap bearing support construction of the present utility model, comprise casing 1, cast aluminium rear end cap 2 is installed on the casing 1, bearing chamber 3 is arranged on the rear end cap 2, bearing 4 is installed in the bearing chamber 3, bearing 4 is connected with rotating shaft 5, and the inwall of described bearing chamber 3 is provided with radially O type circle hole groove 6, is provided with O type circle 7 in the groove of hole, after installing, the outer wall of bearing 4 and O type circle 7 are closely contacted with.

At the built-in rubber o-ring device of the rear end cap bearing chamber of motor, favorable sealing property, and be on bearing chamber 3, to offer the hole groove, its processing technology is simple, with low cost.

Certainly, the utility model is not limited to above-mentioned execution mode, as long as it reaches technique effect of the present utility model with essentially identical means, all should belong to protection range of the present utility model.

Claims (1)

1, a kind of motor that improves rear cap bearing support construction, comprise casing (1), rear end cap (2) is installed on the casing (1), bearing chamber (3) is arranged on the rear end cap (2), bearing (4) is installed in the bearing chamber (3), and bearing (4) is connected with rotating shaft (5), it is characterized in that: the inwall of described bearing chamber (3) is provided with radially O type circle hole groove (6), be provided with O type circle (7) in the groove of hole, the outer wall of bearing (4) and O type circle (7) be contact closely.

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