Motor non-return structure

Abstract

The utility model discloses a motor non-return structure, which is characterized in that a convex part is arranged on the surface of a rear outer cover of a motor facing the end part of a rotating shaft, and an arc-shaped groove is arranged on the radial outer side of the convex part; the rotating shaft and the non-return disc are connected through a key and rotate coaxially; the non-return disc is provided with a radial non-return groove, and the inner side of the non-return groove corresponds to the arc-shaped groove of the protruding part. A non-return ball is arranged in the non-return groove, and a groove plug is arranged on the outer side of the non-return groove. The backstop device has the advantages that the backstop structure and the motor are combined into a whole, the anchoring function of the rear outer cover is ingeniously utilized, and the backstop device is of a mechanical structure and is stable, reliable and better in effect. The size of the non-return structure is effectively reduced, and related manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to a motor, and more particularly to a backstop structure. Background Art

[0002] The motor's check structure is used to ensure that the motor can only rotate in one direction; the existing vertical motor check structure is a separate structure from the motor, which is heavy, large, complex, expensive, and has high maintenance costs. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a non-return structure integrated with the motor, using the rear outer cover of the motor as an anchor, which is not only stable and reliable, but also integrated with the motor; the specific technical solution is as follows:

[0004] A motor check structure, wherein a protrusion is arranged on the surface of a rear outer cover of the motor facing the end of a rotating shaft, and an arc-shaped groove is arranged on the radial outer side of the protrusion; the rotating shaft and the check disk are connected by a key and rotate coaxially; the check disk is provided with a radial check groove, and the inner side of the check groove corresponds to the arc-shaped groove of the protrusion; a check ball is arranged in the check groove, and a groove plug is arranged on the outer side of the check groove; the deepest depth of the arc-shaped groove is greater than the radius of the check ball; the shallowest part of the arc-shaped groove is smoothly connected to the outer circle of the rear outer cover.

[0005] A spring is arranged between the check ball and the slot plug.

[0006] A shaft cover is arranged outside the end of the rotating shaft, and the shaft cover is fixed on the rear outer cover.

[0007] There are four arc-shaped grooves, which are evenly arranged around the circumference of the raised part.

[0008] The maximum arc depth of the groove is greater than the radius of the check ball.

[0009] The outer inner wall of the non-return groove is provided with threads, and the groove plug is also provided with threads, and the groove plug is connected to the outer side of the non-return groove through threads.

[0010] The advantages of the utility model are:

[0011] The check structure is integrated with the motor, and the anchoring function of the rear cover is cleverly utilized. The check is a mechanical structure, which is stable and reliable, and has better effect. It effectively reduces the volume of the check structure and reduces the related manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2-1 is a schematic diagram of the structure of the rear outer cover;

[0014] Figure 2-2 for Figure 2-1 Left view of

[0015] Figure 3 It is a structural schematic diagram of the check disk;

[0016] Figure 4 Schematic diagram of the relationship between the check disc and the rear outer cover DETAILED DESCRIPTION

[0017] The present invention is described in detail below in conjunction with the accompanying drawings. As shown in the figure, a protrusion 22 is provided on the surface of the rear outer cover 2 of the motor facing the end of the rotating shaft 1, and an arc-shaped groove 21 is provided on the radial outer side of the protrusion; the rotating shaft 1 and the check disk are connected through a key 4 in a keyway 34 and rotate coaxially; the check disk 3 is provided with a radial check groove 31, and the inner side of the check groove corresponds to the protrusion 22; a check ball 5 is provided in the check groove, and a groove plug 32 is provided on the outer side of the check groove.

[0018] A spring 33 is provided between the check ball 5 and the slot plug 32 .

[0019] A shaft cover 6 is disposed outside the end of the rotating shaft 1 , and the shaft cover 6 is fixed on the rear outer cover 2 .

[0020] There are four arc-shaped grooves 21 , which are evenly arranged around the circumference of the raised portion 22 .

[0021] To prevent the check ball from being pushed up into the check groove by the arc groove when it is embedded in the deepest part of the arc groove 21 of the rear outer cover, and to ensure that the check disk is stuck by the rear outer cover, the deepest depth L of the arc groove 21 is greater than the radius R of the check ball; to ensure a smooth transition between the check ball 5 and the raised portion 22 of the rear outer cover 2, the shallowest part of the arc groove is smoothly connected to the outer circle of the rear outer cover.

[0022] The outer inner wall of the check groove 31 is provided with a thread, and the groove plug 32 is also provided with a thread, and the groove plug is connected to the outer side of the check groove through the thread; by adjusting the radial position of the groove plug 32, the pressure applied by the spring to the check ball can be adjusted to ensure that when the motor rotates to a certain speed, the check ball is kept at the outer end of the check groove by utilizing the inertia force.

[0023] The utility model drives the check disk to rotate through the rotating shaft. In the initial stage, since the rear outer cover is provided with an arc-shaped groove, the check ball moves beyond the outer side of the check groove under the push of the arc-shaped groove. When the rotating speed reaches a certain value, due to the effect of centrifugal force, the check ball is kept at the outer end of the check groove, and the rotation of the rotating shaft is not restricted by the rear outer disk. When the motor speed decreases, the return spring pushes the check ball back into the arc-shaped groove along the check groove, and is embedded between the rear outer disk and the check disk. The motor cannot rotate in another direction, thereby preventing the rotor from changing its rotating direction.

Claims

1. A motor backstop structure, characterized in that: A protrusion is arranged on the surface of the rear outer cover of the motor facing the end of the rotating shaft, and an arc-shaped groove is arranged on the radial outer side of the protrusion; the rotating shaft and the check plate are connected by a key and rotate coaxially; the check plate is provided with a radial check groove, and the inner side of the check groove corresponds to the arc-shaped groove of the protrusion; a check ball is arranged in the check groove, and a groove plug is arranged on the outer side of the check groove; the deepest depth of the arc-shaped groove is greater than the radius of the check ball; the shallowest part of the arc-shaped groove is smoothly connected to the outer circle of the rear outer cover.

2. The motor backstop structure according to claim 1, characterized in that: A spring is arranged between the check ball and the slot plug.

3. The motor backstop structure according to claim 1, characterized in that: A shaft cover is arranged outside the end of the rotating shaft, and the shaft cover is fixed on the rear outer cover.

4. The motor backstop structure according to claim 1, characterized in that: There are four arc-shaped grooves, which are evenly arranged around the circumference of the raised part.

5. The motor backstop structure according to claim 1, characterized in that: The outer inner wall of the non-return groove is provided with threads, and the groove plug is also provided with threads, and the groove plug is connected to the outer side of the non-return groove through threads.

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