CN213817504U

CN213817504U - Motor end cover for placing PTC element and fan cooling structure

Info

Publication number: CN213817504U
Application number: CN202022111925.7U
Authority: CN
Inventors: 潘耀典; 刘汉忠
Original assignee: Shenzhen Chengfang Electric Machine Co ltd
Current assignee: Shenzhen Chengfang Electric Machine Co ltd; Intex Industries Xiamen Co Ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-07-27
Anticipated expiration: 2030-09-23

Abstract

The utility model discloses a motor end cover and a fan cooling structure on which PTC elements are placed, and relates to the technical field of electric motors. The utility model includes a stator assembly, a rotor assembly, a PTC element and an end cover. The open cylindrical shape, the end cover is fixed at the opening of the stator casing, and the end cover is provided with a mounting hole for installing the PTC element; the rotor assembly includes windings, and a cooling fan is arranged inside the stator casing, The cooling fan is fixed at one end of the winding, and the stator casing is provided with an exhaust notch corresponding to the position of the cooling fan; the beneficial effect of the utility model is that the PTC element is cooled and dissipated by utilizing the air flow driven by the rotation of the cooling fan, thereby improving the performance of the cooling fan. power of the motor.

Description

Motor end cover for placing PTC element and fan cooling structure

Technical Field

The utility model relates to the technical field of electric machines, more specifically the utility model relates to a place motor end cover and fan cooling structure of PTC component.

Background

The household appliances have higher and higher requirements on safety, the used motor has higher requirements on safety, and the motor is required to have a corresponding protection mechanism to prevent the motor from being burnt out due to overheating to generate safety accidents. It is common practice to use a protection element, such as a PTC, in series with the motor through an electrical circuit.

The PTC element has internal resistance, and when the current is too large, the PTC element can generate heat seriously, so that the risk of misoperation is caused. The existing solution is to limit the power of the motor, design the rated power of the motor to be very small, and make the working current as small as possible, so that the heat productivity of the PTC is small when the PTC works, and the malfunction is not caused when the PTC works normally. The current in the circuit is limited, the torque output of the motor is reduced, and the application range of the motor is narrowed. While placing higher demands on the PTC element itself.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a place motor end cover and fan cooling structure of PTC component cools off the heat dissipation through the air current that utilizes the rotatory drive of cooling fan to the PTC component, improves the power of motor.

The utility model provides a technical scheme that its technical problem adopted is: the motor end cover for placing PTC element and fan cooling structure is characterized by that it includes stator component, rotor component, PTC element and end cover,

the stator assembly comprises a stator shell, the stator shell is in a cylindrical shape with an opening at one end, the end cover is fixed at the opening of the stator shell, and the end cover is provided with a mounting hole for mounting the PTC element;

the rotor assembly comprises a winding, a cooling fan is arranged in the stator shell and fixed at one end of the winding, and an exhaust notch is formed in the position, corresponding to the cooling fan, of the stator shell.

In the above structure, the rotor assembly further includes a central rotating shaft passing through the center of the winding, and the central rotating shaft is rotatably mounted on the end cover and the stator housing.

In the above structure, a circuit board electrically connected to the PTC element is fixedly mounted on the outer side of the end cap.

In the structure, the end covers are symmetrically provided with terminals, one ends of the terminals are electrically connected to the circuit board, and the other ends of the terminals extend into the stator shell.

In the above structure, the exhaust gaps are distributed along the radial direction of the stator housing.

The utility model has the advantages that: the PTC motor can bear higher working current (can be improved by more than 20%), the power of the motor can be higher, the torque output can be larger, and the application range of the motor is further expanded.

Drawings

Fig. 1 is a three-dimensional structure diagram of a motor end cover and a fan cooling structure for placing PTC elements according to the present invention.

Fig. 2 is an exploded structural view of a motor end cover and a fan cooling structure for placing the PTC element according to the present invention.

Fig. 3 is a schematic sectional view of a motor end cover and a fan cooling structure for placing the PTC element according to the present invention.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. The utility model discloses each technical feature in the creation can the interactive combination under the prerequisite that does not contradict conflict each other.

Referring to fig. 1 and 2, the present invention discloses a motor end cover and a fan cooling structure for placing a PTC element, specifically, the motor end cover and the fan cooling structure comprise a stator assembly 10, a rotor assembly 20, a PTC element 30 and an end cover 40, wherein the stator assembly 10 comprises a stator housing 101, the stator housing 101 is in a cylinder shape with an open end, the end cover 40 is fixed at an opening of the stator housing 101, the end cover 40 is provided with a mounting hole 401 for mounting the PTC element 30, and the aperture of the mounting hole 401 is larger than the size of the PTC element 30; the rotor assembly 20 comprises a winding 201, a cooling fan 50 is arranged inside the stator housing 101, the cooling fan 50 is fixed at one end of the winding 201, in the scheme, a plurality of bayonets are uniformly distributed on the winding 201, and a protruding part of the cooling fan 50 is clamped in the bayonets of the winding; the stator housing 101 is provided with exhaust gaps 102 corresponding to the positions of the cooling fans 50, and in this embodiment, as shown in fig. 1 and 3, the exhaust gaps 102 are distributed along the radial direction of the stator housing 101.

In addition, as shown in fig. 2, the rotor assembly 20 further includes a central rotating shaft 202, the central rotating shaft 202 penetrates through the center of the winding 201, and the central rotating shaft 202 is rotatably mounted on the end cover 40 and the stator housing 101. A circuit board 60 electrically connected with the PTC element 30 is fixedly arranged on the outer side of the end cover 40; the end cap 40 is further symmetrically provided with terminals 402, one end of each terminal 402 is electrically connected to the circuit board 60, and the other end of each terminal 402 extends into the stator housing 101.

Through the structure, the utility model discloses a place motor end cover 40 and fan cooling structure of PTC component 30 designs a mounting hole 401 that is greater than PTC component 30 on keeping away from motor heating area's end cover 40, connects PTC through fixing circuit board 60 on motor end cover 40, places PTC component 30 in the mounting hole 401 department of design on end cover 40 to design a cooling fan 50 near PTC component 30, utilize the rotatory air current that drives of cooling fan 50 to carry out cooling heat dissipation to PTC component 30. The PTC element 30 is away from the heat source and there is cooling heat dissipation of the cool air. Therefore, the PTC with the same model can bear higher working current (can be increased by more than 20%), the power of the motor can be increased, the torque output can be increased, and the application range of the motor is further expanded.

While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.

Claims

1. a motor end cover and a fan cooling structure for placing a PTC element, it is characterized in that, comprise stator assembly, rotor assembly, PTC element and end cover,

The stator assembly includes a stator casing, the stator casing is cylindrical with one end open, the end cover is fixed at the opening of the stator casing, and the end cover is provided with a mounting hole for installing the PTC element;

The rotor assembly includes a winding, a cooling fan is arranged inside the stator casing, the cooling fan is fixed at one end of the winding, and an exhaust gap is provided in the stator casing corresponding to the cooling fan.

2. A motor end cover and fan cooling structure for placing PTC elements according to claim 1, wherein the rotor assembly further comprises a central shaft, which passes through the center of the winding, and the central shaft rotates Mounted on end caps and stator housing.

3 . The motor end cover and fan cooling structure for placing PTC components according to claim 1 , wherein a circuit board electrically connected to the PTC components is fixedly mounted on the outer side of the end cover. 4 .

4. The motor end cover and fan cooling structure for placing PTC components according to claim 3, wherein the end cover is also symmetrically mounted with terminals, and one end of the terminals is electrically connected to the circuit board , the other end of the terminal extends into the stator housing.

5 . The motor end cover and fan cooling structure for placing PTC elements according to claim 1 , wherein the exhaust gaps are distributed along the radial direction of the stator casing. 6 .