Motor shaft core for fan heater

Abstract

A motor shaft core for a warm air blower comprises a shaft body, a cavity communicated to the tail end of the shaft body is arranged in the shaft body, and the shaft body can be rapidly cooled through the arrangement of the cavity. A decontamination section is arranged at the head end, used for assembling, of the shaft body, a circular truncated cone face is arranged on the side, close to the head end, of the decontamination section, a plurality of channels allowing oil dirt to enter are distributed in the circular truncated cone face, and the channels are communicated with the cavity. When the motor shaft is used, greasy dirt at the head end of the shaft body can enter the cavity along the channel, and the greasy dirt is prevented from entering the motor along the surface of the shaft body to interfere with operation of the motor and even damage the motor. Compared with the prior art, the utility model has the following beneficial effects: oil stains at the head end of the shaft body can be collected, and the oil stains are prevented from entering the motor along the surface of the shaft body to interfere with the operation of the motor and even damage the motor.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor shafts, and in particular relates to a motor shaft core used for a heater. Background Art

[0002] As a common indoor heating device, air heaters are widely used in homes, offices and other places that require heating. One of its core components is the motor shaft, which plays a vital role in the operation of the air heater. The motor shaft connects the motor and the fan, and is responsible for transmitting the rotational power generated by the motor to the fan to drive the fan to rotate, thereby generating wind flow and heating the air through the heating element. However, in actual use, the motor shaft and its connection parts face several technical challenges and problems.

[0003] First, since friction will occur at the connection between the motor shaft and the fan when rotating at high speed, lubricating oil must be added regularly to ensure smooth operation and reduce wear. However, as the use time accumulates, the lubricating oil will absorb dust and other impurities in the environment, forming oil stains. These oil stains will seriously reduce the lubrication effect of the connection.

[0004] Secondly, the oil on the motor shaft surface will flow along the motor shaft surface toward the motor, eroding and damaging the sealing structure around the motor shaft. The integrity of the sealing structure is the key to ensuring the cleanliness and dryness of the motor. Once it is damaged, dust, moisture and other pollutants from the outside will more easily enter the motor, polluting the motor's windings, bearings and other sensitive parts, causing the motor to lose efficiency, even short circuit or damage, greatly reducing the motor's service life.

[0005] Therefore, based on some of the above prior art situations, the present application has been further designed and improved. Utility Model Content

[0006] In view of the deficiencies in the above prior art, the utility model provides a motor shaft core for a heater, including a shaft body, a cavity leading to the rear end of the shaft body is provided in the shaft body, and the provision of the cavity can quickly cool the shaft body. The head end of the shaft body for assembly is provided with a decontamination section, and a frustum is provided on the side of the decontamination section close to the head end, and a plurality of grooves for oil to enter are distributed on the frustum, and the grooves are connected to the cavity. When the utility model is in use, the oil at the head end of the shaft body can enter the cavity along the grooves, thereby preventing the oil from entering the motor along the surface of the shaft body, interfering with the operation of the motor or even damaging the motor.

[0007] As a preferred embodiment of the motor shaft core for a heater described in the utility model, specifically, the diameter of the cavity gradually increases from the head end to the tail end of the shaft body, so that the oil and dirt entering the cavity can move toward the tail end of the shaft body by centrifugal force, avoiding oil and dirt accumulation and clogging.

[0008] As a preferred implementation scheme of the motor shaft core for a heater described in the utility model, specifically, the surface roughness of the shaft body is Ra0.2, which reduces the friction of the shaft body transmission and improves the transmission efficiency.

[0009] As a preferred embodiment of the motor shaft core for a heater described in the utility model, specifically, the tail of the shaft body is equipped with a plug, and a storage cavity is provided in the plug to prevent oil from flowing out.

[0010] As a preferred implementation scheme of the motor shaft core for a heater described in the utility model, specifically, the groove is a straight-through type, with a simple structure and easy manufacturing.

[0011] As a preferred embodiment of the motor shaft core for a heater described in the utility model, specifically, there is an angle α less than 90° between the entry direction of the groove and the axis of the shaft body, and this design is conducive to the flow of oil into the cavity.

[0012] As a preferred implementation scheme of the motor shaft core for a heater described in the utility model, specifically, the groove is spiral, which can provide a certain barrier to prevent the oil stains in the groove from being directly thrown out.

[0013] As a preferred embodiment of the motor shaft core for a heater described in the utility model, specifically, the rotation direction of the groove is the same as the rotation direction of the shaft body, and this design is conducive to the flow of oil and dirt into the cavity.

[0014] Compared with the prior art, the utility model has the following beneficial effects: it can collect oil stains on the head end of the shaft body, and prevent the oil stains from entering the motor along the surface of the shaft body, interfering with the operation of the motor or even damaging the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of Example 1.

[0016] Figure 2 This is a structural cross-sectional view of Example 1.

[0017] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0018] Figure 4 It is a schematic cross-sectional view of Example 1 at the groove.

[0019] Figure 5 It is a three-dimensional schematic diagram of Example 2.

[0020] Figure 6 This is a structural cross-sectional view of Example 2.

[0021] Figure 7 This is a schematic cross-sectional view of Example 2 at the groove.

[0022] The following is a description of the markings in the accompanying drawings of the specification:

[0023] 1. Shaft body; 2. Decontamination section; 3. Cone surface; 4. Groove; 5. Cavity; 6. Plug; 7. Storage cavity. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] In the following embodiments, the same or similar reference numerals throughout represent the same or similar components or components with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limitations on the present invention.

[0026] In the description of the present utility model, it should be understood that the terms: center, longitudinal, transverse, length, width, thickness, up, down, front, back, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, and therefore cannot be understood as limiting the present utility model. In addition, the terms: first, second, etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features shown. In the description of the present utility model, unless otherwise clearly specified and limited, the terms: install, connect, connect, etc. should be understood in a broad sense, and ordinary technicians in this field can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Example 1

[0028] Reference Figures 1 to 4 , a motor shaft core for a heater, comprising a shaft body 1, the surface roughness of the shaft body 1 being Ra0.2, which reduces the friction of the shaft body 1 transmission and improves the transmission efficiency. A cavity 5 leading to the rear end of the shaft body 1 is provided in the shaft body 1, and the provision of the cavity 5 can quickly cool the shaft body 1. A decontamination section 2 is provided at the head end of the shaft body 1 for assembly, and a frustum 3 is provided on the side of the decontamination section 2 close to the head end, and a plurality of grooves 4 for oil to enter are distributed on the frustum 3, and the grooves 4 are connected to the cavity 5. When the utility model is in use, the oil at the head end of the shaft body 1 can enter the cavity 5 along the grooves 4, thereby preventing the oil from entering the motor along the surface of the shaft body 1, interfering with the operation of the motor or even damaging the motor.

[0029] The diameter of the cavity 5 gradually increases from the head end to the tail end of the shaft body 1, so that the oil entering the cavity 5 moves to the tail end of the shaft body 1 by centrifugal force to avoid oil accumulation and blockage. The tail of the shaft body 1 is equipped with a plug 6, and a storage cavity 7 is arranged in the plug 6 to prevent oil from flowing out.

[0030] In particular, the groove 4 is a straight-through type, with a simple structure and convenient manufacturing. The angle α between the entry direction of the groove 4 and the axis of the shaft body 1 is less than 90°, which is conducive to the flow of oil into the cavity 5.

[0031] Example 2

[0032] refer to Figures 5 to 7 , a motor shaft core for a heater, comprising a shaft body 1, the surface roughness of the shaft body 1 being Ra0.2, which reduces the friction of the shaft body 1 transmission and improves the transmission efficiency. A cavity 5 leading to the rear end of the shaft body 1 is provided in the shaft body 1, and the provision of the cavity 5 can quickly cool the shaft body 1. A decontamination section 2 is provided at the head end of the shaft body 1 for assembly, and a frustum 3 is provided on the side of the decontamination section 2 close to the head end, and a plurality of grooves 4 for oil to enter are distributed on the frustum 3, and the grooves 4 are connected to the cavity 5. When the utility model is in use, the oil at the head end of the shaft body 1 can enter the cavity 5 along the grooves 4, thereby preventing the oil from entering the motor along the surface of the shaft body 1, interfering with the operation of the motor or even damaging the motor.

[0033] The diameter of the cavity 5 gradually increases from the head end to the tail end of the shaft body 1, so that the oil entering the cavity 5 moves to the tail end of the shaft body 1 by centrifugal force to avoid oil accumulation and blockage. The tail of the shaft body 1 is equipped with a plug 6, and a storage cavity 7 is arranged in the plug 6 to prevent oil from flowing out.

[0034] In particular, the groove 4 is spiral, which can provide some resistance to prevent the oil in the groove 4 from being thrown out directly. The rotation direction of the groove 4 is the same as the rotation direction of the shaft body 1, and this design is conducive to the oil flowing into the cavity 5.

[0035] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention shall be based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.

Claims

1. A motor shaft core for a heater, characterized in that: The shaft body (1) comprises a cavity (5) which is arranged inside the shaft body (1) and leads to the rear end of the shaft body (1); The head end of the shaft body (1) for assembly is provided with a decontamination section (2), a side of the decontamination section (2) close to the head end is provided with a frustum (3), a plurality of grooves (4) for oil dirt to enter are distributed on the frustum (3), and the grooves (4) are connected to the cavity (5).

2. The motor shaft core for a heater according to claim 1, characterized in that: The caliber of the cavity (5) gradually increases from the head end to the tail end of the shaft body (1).

3. The motor shaft core for a heater according to claim 1, characterized in that: The surface roughness of the shaft body (1) is Ra0.

2.

4. The motor shaft core for a heater according to claim 1, characterized in that: The tail of the shaft body (1) is equipped with a plug (6), and a storage chamber (7) is arranged in the plug (6).

5. The motor shaft core for a heater according to claim 1, characterized in that: The groove (4) is of a straight-through type.

6. The motor shaft core for a heater according to claim 5, characterized in that: An angle α smaller than 90° is formed between the entry direction of the groove (4) and the axis of the shaft body (1).

7. The motor shaft core for a heater according to claim 1, characterized in that: The groove (4) is spiral-shaped.

8. The motor shaft core for a heater according to claim 7, characterized in that: The rotation direction of the groove (4) is the same as the rotation direction of the shaft body (1).

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