Drive motor input shaft rear ball bearing plug

Abstract

The utility model discloses a drive motor input shaft rear ball bearing plug which comprises a main body and a sealing gasket located at one end of the main body, external threads are arranged on the outer circle face of the main body, a hexagonal hole is formed in the sealing gasket, and the side face, facing the main body, of the sealing gasket is an inwards-sunken inclined face. The sealing gasket is in smooth transition with the outer circle face of the main body, when the plug is screwed, force generated by deformation of the sealing gasket enables external threads on the main body to be attached to internal threads on the oil hole more tightly, the anti-loosening and sealing effects are improved, and meanwhile the sealing effect is further improved through the sealing gasket.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor accessories technical field, more specifically relates to a kind of driving motor input shaft rear ball bearing screw bolt. BACKGROUND

[0002] The input shaft of motor is provided with bearing between motor shell, generally ball bearing, in order to guarantee the normal rotation of shaft, oil hole is set in the position of motor shell corresponding bearing, and screw bolt is set on oil hole, and lubricating oil can be added to bearing through oil hole after screw bolt is unscrewed, therefore, the inside of general screw bolt is solid (such as the utility model patent of a kind of cover thrust ball bearing disclosed in CN218670191U), and some technologies are also set on the screw bolt Hole, then set oil nozzle on the through hole, oil nozzle is connected to oil supply system by pipeline, to realize the addition of lubricating oil without disassembling screw bolt.

[0003] However, the sealing of the conventional screw bolt is only achieved by the cooperation of the external thread and the internal thread on the oil hole, and the operation of the motor may cause vibration, which may cause the screw bolt to loosen, thereby causing the lubricating oil inside the bearing to leak from the gap between the threads, affecting the normal use of the bearing, and also causing frequent maintenance and increasing maintenance costs. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of the prior art, the utility model provides a driving motor input shaft rear ball bearing screw bolt, which has good anti-loosening and sealing effects.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a driving motor input shaft rear ball bearing screw bolt, comprising a main body and a sealing gasket located at one end of the main body, an external thread is provided on the outer circular surface of the main body, a hexagonal hole is provided on the sealing gasket, the side surface of the sealing gasket facing the main body is an inclined surface that is recessed, and the sealing gasket and the outer circular surface of the main body are smoothly transitioned.

[0006] Further, the angle between the inclined surface on the sealing gasket and the other side of the sealing gasket is 0.5-1.5 degrees.

[0007] Further, a transition portion is provided between the inclined surface on the sealing gasket and the outer circular surface of the main body, the transition portion comprises a first arc surface, a second arc surface and a connecting inclined surface located between the first arc surface and the second arc surface, the first arc surface is connected with the inclined surface, and the second arc surface is connected with the outer circular surface of the main body.

[0008] Further, the radius of the first arc surface is greater than the radius of the second arc surface.

[0009] Further, the inclination angle between the connecting inclined surface and the outer circular surface of the main body is 40-50 degrees.

[0010] Further, the maximum thickness of the sealing gasket in the axial direction is less than the axial thickness of the transition portion.

[0011] Further, a flat surface is arranged between the inclined surface and the first arc surface of the sealing gasket.

[0012] Further, a mounting hole is arranged on the main body, and the mounting hole is communicated with the hexagonal hole.

[0013] Compared with the prior art, the utility model has the advantages that: the screw plug is connected on the oil hole through the external thread on the main body, and when the screw plug is screwed, the sealing gasket at one end of the main body will be deformed, the inclined surface on the sealing gasket is tightly attached to the surface around the oil hole, and the external thread on the main body and the internal thread on the oil hole are more closely combined through the force generated by the deformation of the sealing gasket, so that the anti-loosening and sealing effects are improved, and the sealing effect is further improved through the sealing gasket. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic view of the axial section of the screw plug of the driving motor input shaft rear ball bearing of the utility model;

[0015] Figure 2 It is a schematic view of the axial section of the screw plug of the driving motor input shaft rear ball bearing of the utility model; Figure 1 It is an enlarged view of the middle A part.

[0016] The drawings are as follows: main body 1, sealing gasket 2, hexagonal hole 3, inclined surface 4, transition portion 5, first arc surface 6, second arc surface 7, connecting inclined surface 8, flat surface 9, mounting hole 10. DETAILED DESCRIPTION

[0017] In the description of the utility model, it should be explained that, for the orientation words, such as the terms "center", "transverse (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the device or element indicated must have a specific orientation, structure and operation, and cannot be understood as limiting the specific protection scope of the utility model.

[0018] In addition, if the terms "first", "second" are used for the purpose of description only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the "first", "second" features can be explicitly or implicitly included one or more features, and the meaning of "several", "several" in the description of the utility model is two or more than two, unless otherwise specifically limited.

[0019] Reference Figure 1 and Figure 2 The present invention will be further described below.

[0020] A ball bearing plug for the input shaft of a drive motor includes a main body 1 and a sealing gasket 2 located at one end of the main body 1. The outer circular surface of the main body 1 is provided with external threads, and the sealing gasket 2 is provided with a hexagonal hole 3. The side of the sealing gasket 2 facing the main body 1 is an inwardly recessed inclined surface 4, and the sealing gasket 2 smoothly transitions with the outer circular surface of the main body 1.

[0021] In this example, preferably, the angle between the inclined surface 4 on the sealing gasket 2 and the other side of the sealing gasket 2 is 0.5-1.5 degrees.

[0022] like Figure 1 As shown in this example, preferably, a transition portion 5 is provided between the inclined surface 4 on the sealing gasket 2 and the outer circular surface of the main body 1. The transition portion 5 includes a first arc-shaped surface 6, a second arc-shaped surface 7, and a connecting inclined surface 8 located between the first arc-shaped surface 6 and the second arc-shaped surface 7. The first arc-shaped surface 6 is connected to the inclined surface 4, and the second arc-shaped surface 7 is connected to the outer circular surface of the main body 1.

[0023] like Figure 2 As shown, in this example, preferably, the radius of the first arc-shaped surface 6 is greater than the radius of the second arc-shaped surface 7.

[0024] In this example, preferably, the inclination angle between the connecting inclined surface 8 and the outer circular surface of the main body 1 is 40-50 degrees.

[0025] like Figure 2 As shown in this example, preferably, the maximum axial thickness of the sealing gasket 2 is less than the axial thickness of the transition portion 5.

[0026] like Figure 2 As shown, in this preferred embodiment, a flat surface 9 is provided between the inclined surface 4 of the sealing gasket 2 and the first arc-shaped surface 6.

[0027] like Figure 1 As shown in this example, preferably, the main body 1 is provided with a mounting hole 10, which is connected to the hexagonal hole 3. After the screw plug is installed, the oil injector is installed through the mounting hole 10.

[0028] like Figure 1 and Figure 2As shown, the plug is connected to the oil hole through the external thread on the main body 1. When the plug is tightened, the sealing gasket 2 at one end of the main body 1 will deform, and the inclined surface 4 on it will be in close contact with the surface around the oil hole. The force generated by the deformation of the sealing gasket 2 makes the external thread on the main body 1 and the internal thread on the oil hole fit more tightly, improving the anti-loosening and sealing effect. At the same time, the sealing gasket 2 further improves the sealing effect.

[0029] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A ball bearing plug for the input shaft of a drive motor, characterized in that: It includes a main body and a sealing gasket located at one end of the main body. The outer circular surface of the main body is provided with external threads, the sealing gasket is provided with a hexagonal hole, the side of the sealing gasket facing the main body is an inwardly inclined surface, and the sealing gasket smoothly transitions with the outer circular surface of the main body.

2. The ball bearing plug at the rear of the input shaft of the drive motor according to claim 1, characterized in that: The angle between the inclined surface on the sealing gasket and the other side of the sealing gasket is 0.5-1.5 degrees.

3. The ball bearing plug at the rear of the drive motor input shaft according to claim 1, characterized in that: A transition portion is provided between the inclined surface on the sealing gasket and the outer circular surface of the main body. The transition portion includes a first arc-shaped surface, a second arc-shaped surface, and a connecting inclined surface located between the first arc-shaped surface and the second arc-shaped surface. The first arc-shaped surface is connected to the inclined surface, and the second arc-shaped surface is connected to the outer circular surface of the main body.

4. The ball bearing plug at the rear of the drive motor input shaft according to claim 3, characterized in that: The radius of the first arc-shaped surface is greater than the radius of the second arc-shaped surface.

5. The ball bearing plug at the rear of the drive motor input shaft according to claim 3, characterized in that: The inclination angle between the connecting inclined surface and the outer circular surface of the main body is 40-50 degrees.

6. The ball bearing plug at the rear of the drive motor input shaft according to claim 3, characterized in that: The maximum axial thickness of the sealing gasket is less than the axial thickness of the transition section.

7. The ball bearing plug at the rear of the drive motor input shaft according to claim 3, characterized in that: A flat surface is provided between the inclined surface of the sealing gasket and the first arc-shaped surface.

8. The ball bearing plug at the rear of the drive motor input shaft according to claim 1, characterized in that: The main body is provided with mounting holes, which are connected to hexagonal holes.

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