Ventilation pipe for motor

Abstract

The utility model provides a breather pipe for a motor, which is provided with an inner pipe part and an outer pipe part sleeved on the periphery of the inner pipe part, the periphery of the inner pipe part is abutted against the inner peripheral surface of the outer pipe part, and the hardness of the inner pipe part is relatively higher, so that the outer pipe part can be supported by the inner pipe part; the situation that the inner wall of the outer pipe part is excessively close to or even attached to the outer pipe part due to water pressure or bending or other reasons is avoided, the ventilation pipe for the motor is kept unblocked, the ventilation capacity of the ventilation pipe is guaranteed, it can be effectively guaranteed that the air pressure in the motor can be adjusted in time, normal work of the motor is prevented from being affected, and even parts in the motor are prevented from being damaged. Therefore, normal operation of the motor is guaranteed and service life of the motor is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor supporting components, and in particular relates to a vent pipe for a motor. Background Art

[0002] Motors are commonly used power devices. After a period of use, the heat generated by the motor itself will cause the gas inside the housing to expand and contract, resulting in changes in the air pressure inside the housing. The air pressure inside the motor housing needs to be adjusted in time to avoid excessive air pressure affecting the normal operation of the motor parts inside the housing or even causing damage to them. For underwater motors that cannot be directly connected to the outside air, it is necessary to use a vent pipe to connect the air inside the motor housing to the outside air.

[0003] At present, the commonly used ventilation tube is an ordinary rubber tube or plastic tube with a certain flexibility. The motor housing is provided with a motor ventilation hole. One end of the ventilation tube is connected to the motor ventilation hole, and the other end extends to the outside air. However, when the rubber tube or plastic tube is bent, the inner wall of the tube body at the bend will be close to or even completely attached, causing the ventilation volume of the ventilation tube to be seriously reduced or even blocked, thereby affecting the regulating function of the internal air pressure of the motor. In addition, for underwater motors, ordinary rubber tubes or plastic tubes are also prone to shrinkage or bending due to water pressure or water flow impact, which affects the ventilation volume. Utility Model Content

[0004] The utility model is designed to solve the above problems, and aims to provide a motor ventilation pipe that can always keep the inside of the motor connected with the outside air and effectively ensure the ventilation volume. The utility model adopts the following technical solutions:

[0005] The utility model provides a ventilation pipe for a motor, which is used to connect the inside of the motor with the external air, and is characterized in that it comprises: an inner tube portion; and an outer tube portion, which is sleeved on the outer circumference of the inner tube portion, wherein the inner tube portion is used to support the outer tube portion, the outer circumference of the inner tube portion is in contact with the inner circumferential surface of the outer tube portion, and the hardness of the inner tube portion is greater than the hardness of the outer tube portion.

[0006] The motor ventilation pipe provided by the utility model may also have such a technical feature, wherein the outer tube part is a flexible tube, and the inner tube part is a spring.

[0007] The motor ventilation pipe provided by the utility model may also have such a technical feature, wherein the inner tube portion has a plurality of coils connected in sequence, and in a straightened state, two adjacent coils of the spring fit each other.

[0008] The motor ventilation pipe provided by the utility model may also have such a technical feature, wherein the inner diameter of the outer tube portion is uniform, and the inner diameter of the spring is uniform.

[0009] The motor ventilation pipe provided by the utility model may also have such a technical feature, wherein the inner diameter of the spring is 1 mm to 1.5 mm.

[0010] The motor ventilation pipe provided by the utility model may also have such a technical feature, wherein the wire diameter of the coil of the spring is 0.25mm-0.5mm, and the pitch of the multiple coils is consistent with the wire diameter.

[0011] The motor ventilation pipe provided by the utility model may also have such technical features, wherein the outer tube portion includes: an outer tube body, which is tubular; and two circles of flanges, which are formed at one end of the outer tube body, and an annular groove is formed between the two circles of flanges.

[0012] The motor ventilation pipe provided by the utility model may also have such a technical feature, wherein the motor is an underwater motor and the outer tube part is a waterproof flexible tube.

[0013] Function and effect of utility model

[0014] According to the motor ventilation pipe of the utility model, since it comprises an inner tube portion and an outer tube portion sleeved on the outer periphery of the inner tube portion, the outer periphery of the inner tube portion abuts against the inner periphery of the outer tube portion, and the inner tube portion has a relatively greater hardness, the outer tube portion can be supported by the inner tube portion to avoid excessive proximity or even adhesion to the inner wall of the outer tube portion due to water pressure or bending, thereby keeping the motor ventilation pipe unobstructed and ensuring the ventilation volume of the ventilation pipe, which can effectively ensure that the air pressure inside the motor can be adjusted in time to avoid affecting the normal operation of the motor or even damaging the components inside the motor, thereby ensuring the normal operation of the motor and extending the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of a vent pipe for a motor in an embodiment of the utility model;

[0016] Figure 2 This is a structural exploded view of the vent pipe for the motor in the embodiment of the utility model;

[0017] Figure 3 It is an enlarged view of the end of the vent pipe for the motor in the embodiment of the utility model;

[0018] Figure 4 It is a three-dimensional diagram of the end of the inner tube portion in an embodiment of the utility model;

[0019] Figure 5is a side view of the end of the inner tube portion in an embodiment of the utility model;

[0020] Figure 6 It is a structural schematic diagram of a motor ventilation pipe in a bent state in an embodiment of the utility model.

[0021] Reference numerals:

[0022] The motor vent pipe 100 comprises an outer pipe portion 110 , an outer pipe body 111 , a flange 112 , an annular groove 110 a , a vent hole 110 b , an inner pipe portion 120 , a coil 121 , and a bent portion 130 . DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the utility model easier to understand, the motor vent pipe of the utility model is specifically described below in conjunction with embodiments and drawings.

[0024] <Example>

[0025] This embodiment provides a motor ventilation pipe, which is used to connect the internal space of the motor housing with the air outside the motor, so as to adjust the air pressure inside the motor housing to prevent the air pressure from being too high. In this embodiment, a motor ventilation hole is provided on the motor housing, which is a circular through hole. One end of the motor ventilation pipe is used to connect to the motor ventilation hole, and the other end extends to the external air. For example, when the motor is an underwater motor, the other end of the motor ventilation pipe can extend to the air above the water surface.

[0026] The structure of the motor vent pipe will be described in detail below.

[0027] Figure 1 is a three-dimensional diagram of the vent pipe for the motor in this embodiment, Figure 2 It is a structural exploded view of the ventilation pipe for the motor in this embodiment.

[0028] like Figure 1 and Figure 2 As shown, the motor vent pipe 100 includes an outer pipe portion 110 and an inner pipe portion 120 .

[0029] The outer tube portion 110 is a flexible tube, which is generally in the shape of a long thin round tube, and includes an outer tube body 111 and two flanges 112 .

[0030] The outer tube body 111 is in a tubular shape with a uniform diameter, and a through vent hole 110b is formed inside the outer tube body 111. The shape of the side wall of the vent hole 110b (ie, the inner wall of the outer tube 110) matches the outer peripheral shape of the inner tube 120.

[0031] Figure 3 It is an enlarged view of the end of the vent pipe for the motor in this embodiment.

[0032] As Figure 3 shown, two flanges 112 are formed at one end of the outer tube body 111 and are spaced apart from each other by a certain distance. The cross-sections of the rubber outer tube 110 at the flanges 112 are also in the shape of a circular ring, and the diameters of the cross-sections at the two flanges 112 are the same. A ring groove 110a is formed between the two flanges 112 for connecting this end of the rubber outer tube 110 to the motor vent hole on the motor housing. The circumferential cross-section of the ring groove 110a is in the shape of a "U". The motor vent hole is a circular through-hole. The bottom of the ring groove 110a is in the shape of a circular ring, and the diameter at the bottom is slightly larger than the aperture of the motor vent hole, so that the edge of the motor vent hole can be fitted with the bottom of the ring groove 110a to achieve a certain airtight connection. In addition, the groove width of the ring groove 110a is larger than the housing thickness of the motor housing at the motor vent hole, so that sealing gaskets, fixing parts, etc. can be arranged in the ring groove 110a.

[0033] In this embodiment, the outer tube portion 110 is a rubber tube.

[0034] Figure 4 is a perspective view of the end of the inner tube portion in this embodiment, Figure 5 is a side view of the end of the inner tube portion in this embodiment.

[0035] As Figure 2 、 Figure 4 and Figure 5 shown, the inner tube portion 120 is a spring with a uniform diameter and a uniform wire diameter. The inner tube portion 120 has a plurality of coils 121 connected in sequence, and each coil 121 is in the shape of an open ring and has substantially the same diameter. When the inner tube portion 120 is in the initial straightening state without external force, its adjacent two coils 121 are in contact with each other.

[0036] In this embodiment, the inner tube portion 120 is a stainless steel spring, and its hardness is greater than that of the rubber outer tube portion 110. The inner diameter d1 of this spring is 1.5 mm, and this value is calculated according to the required ventilation volume; the diameter (wire diameter) d2 of a single coil 121 is 0.5 mm, and the pitch d3 of the plurality of coils 121 is 0.5 mm, that is, the pitch d3 is the same as the wire diameter d2, so that the adjacent two coils 121 are in contact with each other. The length of the metal inner tube 120 can be set as required, for example, according to the distance from the motor vent hole to the water surface.

[0037] In an alternative solution, the inner diameter of the spring can also be 1 mm to 1.5 mm, the wire diameter of a single coil 121 can also be 0.25 mm to 0.5 mm, and the pitch of the plurality of coils 121 is the same as the wire diameter of a single coil 121.

[0038] From the above size data and Figure 2 it can be seen that the inner tube portion 120 of this embodiment is a spring that is overall very thin, has a very thin wire diameter, and has a large number of coils.

[0039] Figure 6 Schematic diagram of the structure of the motor ventilation pipe in the bent state in this embodiment.

[0040] like Figure 6 As shown, when the inner tube portion 120 (thin spring) is bent, one ends of two adjacent coils in the coil of the bent portion of the spring abut against each other, and the other end opposite to the one end cannot be separated by a large distance due to the limiting effect of other coils in front and behind. Therefore, the bent portion 130 of the motor ventilation pipe 100 will have a relatively rounded curve without a sharp turning portion, which can avoid the inner wall of the bent portion 130 of the outer tube portion 110 being stuck to the outer wall due to the sharp turning portion.

[0041] Functions and Effects of the Embodiments

[0042] The motor ventilation pipe provided by the present embodiment comprises an inner tube portion and an outer tube portion sleeved on the outer periphery of the inner tube portion, the outer periphery of the inner tube portion abuts against the inner periphery of the outer tube portion, and the inner tube portion has a relatively greater hardness. Therefore, the outer tube portion can be supported by the inner tube portion to avoid excessive proximity or even adhesion to the inner wall of the outer tube portion due to water pressure or bending, thereby keeping the motor ventilation pipe unobstructed and ensuring the ventilation volume of the ventilation pipe, thereby effectively ensuring that the air pressure inside the motor can be adjusted in time to avoid affecting the normal operation of the motor or even damaging the components inside the motor, thereby ensuring the normal operation of the motor and extending the service life of the motor.

[0043] In the embodiment, the inner tube portion is a spring with a thinner wire diameter and a larger number of coils, and the outer tube portion is a flexible rubber tube. Therefore, while the outer tube portion is well supported, the motor ventilation pipe as a whole still has good flexibility and can be bent to a certain extent, so that the motor ventilation pipe can be suitable for more application scenarios.

[0044] Furthermore, since the inner tube portion is a thin spring with a large number of coils, and the two adjacent coils are in contact with each other when the inner tube portion is straightened, the inner tube portion can also limit the overall bending of the motor ventilation pipe through the abutting coils, so that the motor ventilation pipe will not have a sharp bending part, and even in the bending part of the motor ventilation pipe, one end of the adjacent coils abuts against each other, and the other end cannot be separated by a large distance due to the limiting effect of other coils in front and behind. Therefore, in the bending part, the inner wall of the motor ventilation pipe will not appear obvious close or close, and can maintain a tube diameter roughly the same as other parts, thereby ensuring that the inside of the motor housing is always connected to the external air and the ventilation volume of the motor ventilation pipe can be guaranteed.

[0045] In the embodiment, one end of the ventilation pipe also has two circles of flanges and an annular groove formed between the two circles of flanges. The flange and the annular groove can conveniently connect the end of the ventilation pipe to the motor ventilation hole on the motor housing in an airtight manner, making the assembly of the ventilation pipe more convenient.

[0046] The above embodiments are only used to illustrate the specific implementation methods of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the description are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

[0047] For example, in the above embodiment, the outer tube is a rubber tube. In an alternative solution, the outer tube may also be a tube made of other materials with a lower hardness than the inner tube, such as a plastic tube.

[0048] In the above embodiment, one end of the outer tube has two circles of flanges and annular grooves for assembly with the circular motor vent on the motor housing. In an alternative solution, the end of the outer tube may also adopt other structures according to the motor vent and the housing structure beside it.

[0049] In the above embodiment, the snorkel for motor is used for underwater motors. In alternative solutions, the snorkel for motor can also be used for other types of motors that need ventilation.

Claims

1. A vent pipe for a motor, used to connect the inside of the motor with the outside air, characterized in that: include: inner tube; and The outer tube part is sleeved on the outer circumference of the inner tube part. Wherein, the inner tube portion is used to support the outer tube portion. The outer circumference of the inner tube portion abuts against the inner circumference of the outer tube portion, and the hardness of the inner tube portion is greater than the hardness of the outer tube portion.

2. The motor vent pipe according to claim 1, characterized in that: in, The outer tube is a flexible tube. The inner tube portion is a spring.

3. The motor vent pipe according to claim 2, characterized in that: in, The inner tube has a plurality of coils connected in sequence. In the straightened state, two adjacent coils of the spring fit against each other.

4. The motor vent pipe according to claim 3, characterized in that: in, The inner diameter of the outer tube is uniform, The inner diameter of the spring is uniform.

5. The motor vent pipe according to claim 4, characterized in that: in, The inner diameter of the spring is 1 mm to 1.5 mm.

6. The motor vent pipe according to claim 5, characterized in that: in, The wire diameter of the coil of the spring is 0.25 mm to 0.5 mm, and the pitch of the plurality of coils is consistent with the wire diameter.

7. The motor vent pipe according to claim 1, characterized in that: in, The outer tube portion comprises: an outer tube body in a tubular shape; and Two circles of flanges are formed at one end of the outer tube body, and an annular groove is formed between the two circles of flanges.

8. The motor vent pipe according to claim 1, characterized in that: in, The motor is an underwater motor. The outer tube is a waterproof flexible tube.

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