Motor anti-reversion device

Abstract

An anti-reversal device for a motor relates to the technical field of motors, relates to a motor body, and comprises a retaining disc and an anti-reversal disc, the retaining disc is fixed on a shell of the motor, and a ratchet wheel coaxial with a rotating shaft of the motor is arranged on the retaining disc; the anti-reverse disc is coaxially and fixedly connected with a rotating shaft of the motor, a pressing ring and an anti-reverse ring are arranged on the outer circle of the anti-reverse disc, the ratchet wheel extends into a ring hole of the anti-reverse ring, a plurality of anti-reverse through holes distributed at intervals in the circumferential direction are formed in the anti-reverse ring, and the number of the anti-reverse through holes corresponds to the number of teeth of the ratchet wheel in a one-to-one mode. The anti-reverse through hole inclines from inside to outside along the forward rotation direction of the motor rotating shaft and the radial direction of the anti-reverse ring; steel balls in sliding fit with the anti-reverse through holes are arranged in the anti-reverse through holes respectively, the gap between the anti-reverse ring and the bottom of the ratchet tooth groove is smaller than the radius of the steel balls, and the pressing ring covers the outer side hole openings of the anti-reverse through holes in a sealing mode. The motor anti-reversion device provided by the utility model can prevent the motor from reversion.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to the technology of a motor anti-reversal device. Background Art

[0002] The existing three-phase AC motor can control the direction of rotation by changing the phase sequence of the input power to achieve the operation mode of forward and reverse directions. However, when the motor is used with other special equipment, the motor needs to run only in the forward direction, such as water pumps, gears and other equipment. If the input power phase sequence is wrong, the equipment will not work or will be damaged. Utility Model Content

[0003] In view of the defects existing in the above-mentioned prior art, the technical problem to be solved by the utility model is to provide a motor anti-reversal device which can prevent the motor from reversing.

[0004] In order to solve the above technical problems, the utility model provides a motor anti-reverse device, which relates to a motor body and is characterized in that: it includes a stop plate and an anti-reverse plate;

[0005] The anti-retraction disk is fixed on the housing of the motor, and a ratchet wheel coaxial with the rotating shaft of the motor is provided on the anti-retraction disk;

[0006] The anti-reverse disk is coaxially fixed with the rotating shaft of the motor, a pressure ring and an anti-reverse ring are arranged on the outer circle of the anti-reverse disk, the ratchet extends into the ring hole of the anti-reverse ring, and the anti-reverse ring is provided with a plurality of anti-reverse through holes arranged at intervals along the circumferential direction, the number of the anti-reverse through holes corresponds to the number of teeth of the ratchet, and the anti-reverse through holes are inclined from the inside to the outside along the positive rotation direction of the rotating shaft of the motor and the radial direction of the anti-reverse ring;

[0007] Each anti-reverse through hole is provided with a sliding steel ball, the gap between the anti-reverse ring and the bottom of the ratchet tooth groove is smaller than the radius of the steel ball, and the pressure ring covers the outer openings of each anti-reverse through hole.

[0008] The motor anti-reverse device provided by the utility model utilizes the centrifugal force generated by the rotating shaft when the motor is in forward rotation to drive the steel ball, so that the motor can rotate normally in the forward direction; when the input power phase sequence is wrong, the steel ball is stuck by the ratchet teeth and the anti-reverse through hole, thereby preventing the motor from reversing. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a partial cross-sectional view of the motor anti-reversal device according to an embodiment of the utility model;

[0010] Figure 2 2 is a front view of an anti-reverse disk of a motor anti-reverse device according to an embodiment of the utility model;

[0011] Figure 32. It is a rear view of the anti-reverse disc of the motor anti-reverse device according to the embodiment of the utility model;

[0012] Figure 4 It is an assembly front view of the anti-retraction disk and the anti-reverse disk of the embodiment of the utility model. DETAILED DESCRIPTION

[0013] The following is a further detailed description of an embodiment of the utility model in conjunction with the accompanying drawings, but the embodiment is not intended to limit the utility model. All similar structures and similar changes of the utility model should be included in the protection scope of the utility model. The semicolons in the utility model all represent the relationship of and.

[0014] like Figure 1-Figure 4 As shown, a motor anti-reverse device provided by an embodiment of the utility model relates to a motor body, including a stop plate 1 and an anti-reverse plate 2;

[0015] The anti-recoil plate 1 is fixed on the housing of the motor, and a ratchet 11 coaxial with the rotating shaft of the motor is provided on the anti-recoil plate 1;

[0016] The anti-reverse disk 2 is coaxially fixed to the rotating shaft of the motor, and a pressure ring 21 and an anti-reverse ring 22 are provided on the outer circle of the anti-reverse disk 2. The ratchet 11 extends into the ring hole of the anti-reverse ring 22. The anti-reverse ring 22 is provided with a plurality of anti-reverse through holes 23 arranged at intervals along the circumferential direction. The number of the anti-reverse through holes corresponds to the number of teeth of the ratchet 11, and the anti-reverse through holes are inclined from the inside to the outside along the forward rotation direction of the rotating shaft of the motor and the radial direction of the anti-reverse ring.

[0017] Each anti-reverse through hole is provided with a slidingly matched steel ball 3, the gap between the anti-reverse ring and the bottom of the ratchet tooth groove is smaller than the radius of the steel ball, and the pressure ring 21 covers the outer opening of each anti-reverse through hole.

[0018] The working principle of the present utility model embodiment is as follows:

[0019] In the initial state, some of the steel balls 3 are stuck in the tooth grooves of the ratchet 11, and the other part of the steel balls 3 fall into the anti-reverse through hole 23 due to gravity;

[0020] When the power phase sequence is correct, the motor rotates forward, the anti-reverse plate 2 rotates forward, and because the anti-reverse through hole 22 is arranged obliquely, the steel ball 3 slides into the anti-reverse through hole 22 under the influence of centrifugal force and presses against the pressing ring 21, and the motor operates normally without being affected by the steel ball 3;

[0021] When the power phase sequence is wrong, the motor reverses, and the anti-reverse disk 2 also reverses. Because the anti-reverse through hole 22 is arranged at an angle, part of the steel balls 3 fall into the tooth grooves of the ratchet 11 and are blocked by the ratchet teeth of the ratchet, causing the anti-reverse disk 2 to stop rotating and the motor also stops rotating.

Claims

1. A motor anti-reverse device, relating to a motor body, characterized in that: Including anti-return plate and anti-reverse plate; The anti-retraction disk is fixed on the housing of the motor, and a ratchet wheel coaxial with the rotating shaft of the motor is provided on the anti-retraction disk; The anti-reverse disk is coaxially fixed with the rotating shaft of the motor, a pressure ring and an anti-reverse ring are arranged on the outer circle of the anti-reverse disk, the ratchet extends into the ring hole of the anti-reverse ring, and the anti-reverse ring is provided with a plurality of anti-reverse through holes arranged at intervals along the circumferential direction, the number of the anti-reverse through holes corresponds to the number of teeth of the ratchet, and the anti-reverse through holes are inclined from the inside to the outside along the positive rotation direction of the rotating shaft of the motor and the radial direction of the anti-reverse ring; Each anti-reverse through hole is provided with a sliding steel ball, the gap between the anti-reverse ring and the bottom of the ratchet tooth groove is smaller than the radius of the steel ball, and the pressure ring covers the outer openings of each anti-reverse through hole.

Images