Floor washing machine motor with cooling system

Abstract

The utility model discloses a kind of floor washing machines motor with cooling system, it is related to motor field, including stator, rotor, impeller, the rear end of motor shell is also provided with bottom cover, a through-hole is opened in bottom cover, the front end of motor shell is also provided with sealing shell in the front end of impeller is sequentially connected with air inlet, wind cover, fairing, the rear end portion of fairing is clamped with sealing shell, at least one airflow groove is opened in the lateral wall of fairing, and the air of outside is introduced to pass through motor internal heat dissipation by the negative pressure environment of airflow groove port. The utility model is provided with fairing and the airflow groove of its lateral wall, utilizes the negative pressure effect that airflow groove port naturally generates when impeller works, automatically introduces external cooling air to flow through motor internal, realizes heat dissipation function, reduces the problem of motor performance and life decline due to insufficient heat dissipation, and does not need to additionally set fan or independent power source, simplify system structure, reduce cost and energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of motors, and in particular to a floor scrubber motor with a built-in heat dissipation system. Background Technology

[0002] Floor scrubbers, as commonly used cleaning equipment, rely on an electric motor for power. During prolonged high-load operation, the motor generates a significant amount of heat. If heat dissipation is insufficient, the motor temperature can become excessively high, affecting not only its efficiency and lifespan but also potentially posing safety hazards. Therefore, the motor's heat dissipation performance is a key factor influencing the overall reliability and durability of the floor scrubber.

[0003] Currently, common methods for cooling floor scrubber motors mostly employ external fans or independent air duct structures, using additional fans to draw in outside air to cool the motor. However, these cooling systems are typically complex in structure, occupy a large amount of space, increase the overall size and weight of the machine, and also raise manufacturing costs. Furthermore, some cooling systems rely on the motor itself to drive the fan, but in sealed or semi-sealed environments, airflow is not smooth, resulting in limited cooling effectiveness, especially under sustained high load conditions, where insufficient heat dissipation remains a problem.

[0004] Some motor cooling solutions attempt to set ventilation holes on the motor casing and use the rotation of the internal impeller to create airflow. However, due to the lack of an effective airflow guiding structure, the airflow entering the motor is unevenly distributed, the heat dissipation efficiency is low, and it is easy to draw in dust or moisture, which affects the safe operation of the internal components of the motor.

[0005] Therefore, there is an urgent need for a heat dissipation structure that can automatically form an efficient cooling airflow path during motor operation in order to improve the stability and service life of the motor. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a floor scrubber motor with a built-in heat dissipation system to solve the problems existing in the background art.

[0007] This utility model provides the following technical solution: a floor scrubber motor with a built-in heat dissipation system, including a stator, a rotor, and an impeller. The stator and rotor are coaxially assembled, and the impeller is installed at the front end of the rotor. A motor housing is also assembled on the outside of the stator and rotor, with the impeller located on the outside of the motor housing. A circuit board is also provided on the back of the stator. A bottom cover is also provided at the rear end of the motor housing, with a through hole on the bottom cover. A sealing shell is also provided at the front end of the motor housing, with the impeller placed inside the front end of the sealing shell. An air inlet duct, a fan shroud, and a guide shroud are sequentially connected to the front end of the impeller. The front ends of the air inlet duct and the guide shroud are each provided with a matching air inlet. The rear end of the guide shroud is engaged with the sealing shell to enclose the fan shroud. At least one airflow groove is provided on the side wall of the guide shroud, and the airflow groove communicates with the motor housing. External air is introduced through the negative pressure environment at the port of the airflow groove to dissipate heat through the motor interior.

[0008] Preferably, the front surface of the motor housing is provided with multiple connecting posts, and the outer sides of the multiple connecting posts are connected to a connecting ring coaxial with the motor housing. Each of the connecting posts is provided with an airflow hole, which penetrates the motor housing and the connecting ring and is used to connect to the airflow groove to deliver air.

[0009] Preferably, the sealing shell includes a rear snap-fit ​​part, a positioning ring, and a front snap-fit ​​part arranged in sequence. The rear snap-fit ​​part is connected to the front end of the motor housing, the front snap-fit ​​part is used to assemble the air inlet duct, and the thickness of the positioning ring is higher than that of the rear snap-fit ​​part.

[0010] Preferably, the rear snap-fit ​​portion includes an inner ring and an outer ring, and a guide plate is provided between the inner ring and the outer ring to cooperate with the inner ring and the outer ring to form an exhaust duct.

[0011] Preferably, the rear ends of the inner and outer rings are provided with multiple slots that are adapted to the connecting posts, so as to assemble the sealing shell onto the front end of the motor housing.

[0012] Preferably, there are three airflow slots, the number of which is the same as the number of connecting columns and slots, and each airflow slot has a locking block at its tail that is adapted to the slot.

[0013] Preferably, the connecting ring, positioning ring, and fan cover have the same outer diameter and are flush with each other on their outer surfaces after assembly.

[0014] Preferably, both the exhaust duct and the intake duct have a spiral structure.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model utilizes the airflow grooves provided with a guide shroud and its sidewalls, which are connected to the motor housing. It takes advantage of the negative pressure effect naturally generated at the airflow groove port when the impeller is working to automatically introduce external cooling air into the motor, achieving efficient and self-driven heat dissipation. This reduces the problem of motor performance and lifespan degradation caused by insufficient heat dissipation, and eliminates the need for additional fans or independent power sources, simplifying the system structure and reducing costs and energy consumption. 2. This utility model forms a complete and smooth cooling air duct by cooperating with the connecting post, airflow hole and airflow groove at the front end of the motor housing. This allows external cold air to be efficiently drawn in from the air inlet at the front end of the guide shroud, flow through the core area of ​​the motor and then be discharged. This optimizes the airflow path and makes the airflow distribution uniform, thereby improving the heat dissipation effect. 3. This utility model designs the rear snap-fit ​​portion of the sealing shell as a structure including an inner ring, an outer ring, and a guide plate, forming a spiral exhaust duct. Simultaneously, the air inlet duct also adopts a spiral structure. This spiral air duct design accelerates airflow, reduces eddies and wind resistance, further optimizes airflow efficiency, and enhances heat dissipation capacity. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the exploded structure of the motor according to this utility model.

[0017] Figure 2 This is a schematic diagram of the impeller assembly structure of this utility model.

[0018] Figure 3 This is a partial exploded structural diagram of the present invention.

[0019] Figure 4 This is a schematic diagram of the motor housing assembly structure of this utility model.

[0020] Figure 5 This is a three-dimensional structural diagram of the motor of this utility model.

[0021] Figure 6 This is a schematic diagram of the cross-sectional structure of the motor of this utility model.

[0022] Figure 7 This is a schematic diagram of the airflow direction of this utility model.

[0023] The attached diagram is labeled as follows: 1. Stator; 2. Rotor; 3. Impeller; 4. Motor housing; 41. Connecting column; 42. Connecting ring; 43. Airflow; 5. Sealing shell; 51. Rear locking part; 511. Inner ring; 512. Outer ring; 513. Guide plate; 514. Exhaust duct; 515. Slot; 52. Positioning ring; 53. Front locking part; 6. Air inlet; 7. Air shroud; 8. Guide shroud; 81. Airflow groove; 82. Locking block; 9. Circuit board; 10. Bottom cover; 101. Through hole; 11. Air inlet. Detailed Implementation

[0024] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0025] This utility model provides a floor scrubber motor with a built-in heat dissipation system, such as... Figure 1-7 As shown, the motor includes a stator 1, a rotor 2, and an impeller 3. The stator 1 and rotor 2 are coaxially assembled, and the impeller 3 is fixedly installed at the front end of the rotor 2 and rotates synchronously with the rotor 2. A motor housing 4 is assembled on the outside of the stator 1 and rotor 2 to encapsulate and protect the internal structure of the motor. The impeller 3 is located on the outside of the motor housing 4. A circuit board 9 is also provided on the back of the stator 1 for controlling the operation of the motor. A bottom cover 10 is fixed to the rear end of the motor housing 4 by screws or clips. A through hole 101 is provided in the center or at an appropriate position of the bottom cover 10.

[0026] The front end of the motor housing 4 is provided with a sealing shell 5, and the impeller 3 is placed inside the front end of the sealing shell 5. An air inlet duct 6, a fan shroud 7, and a flow guide shroud 8 are coaxially connected in sequence to the front end of the impeller 3. The front ends of the air inlet duct 6 and the flow guide shroud 8 are each provided with mutually compatible air inlets 11, forming the main air intake path. The rear end of the flow guide shroud 8 engages with the front snap-fit ​​portion 53 of the sealing shell 5, thereby enclosing the fan shroud 7 within it, forming a stable airflow guiding structure.

[0027] To achieve the self-heating function of the motor, at least one airflow groove 81 is formed circumferentially on the side wall of the air guide shroud 8. The airflow groove 81 is connected to the inside of the motor housing 4. Its working principle is as follows: when the impeller 3 rotates at high speed, a local negative pressure zone is formed at the port of the airflow groove 81, and external cold air is automatically introduced by utilizing this negative pressure environment. The external air passes through the inside of the motor housing 4, flows through the stator 1 and rotor 2 and other heat-generating components, absorbs heat, and is finally guided by the airflow groove 81 into the air intake duct 6 for use by the main working airflow, forming a continuous cooling airflow.

[0028] To further optimize airflow organization, the front surface of the motor housing 4 is provided with multiple connecting posts 41 evenly distributed circumferentially. The outer sides of the multiple connecting posts 41 are connected to an annular connecting ring 42 coaxial with the motor housing 4. Each connecting post 41 is provided with an airflow hole 43, which axially penetrates the motor housing 4 and the connecting ring 42, allowing cold air introduced into the motor housing 4 to exit through the airflow hole 43 and airflow groove 81.

[0029] This design structure forms a complete and smooth cooling airflow channel, which allows external cold air to be efficiently drawn in, flow through the core area of ​​the motor, and then discharged. This optimizes the airflow path, thereby making the airflow distribution uniform and improving the heat dissipation effect.

[0030] The sealing shell 5 includes a rear snap-fit ​​portion 51, a positioning ring 52, and a front snap-fit ​​portion 53 arranged sequentially. The rear snap-fit ​​portion 51 is used to connect to the front end of the motor housing 4, and the front snap-fit ​​portion 53 is used to assemble the air inlet duct 6. The thickness of the positioning ring 52 is higher than that of the rear snap-fit ​​portion 51, thereby forming a stepped structure after assembly, which facilitates the positioning and snap-fit ​​of the air guide shroud 8, the fan shroud 7, and the motor housing 4.

[0031] It can be noted that, in order to improve the consistency of the product's appearance and the compactness of its structure, the outer diameter of the connecting ring 42, the positioning ring 52, and the fan cover 7 are the same, and their outer surfaces are flush after assembly, forming a smooth cylindrical appearance.

[0032] The rear snap-fit ​​portion 51 specifically includes an inner ring 511 and an outer ring 512 arranged coaxially, with a plurality of guide plates 513 disposed between the inner ring 511 and the outer ring 512. These guide plates 513, together with the inner ring 511 and the outer ring 512, form a spiral exhaust duct 514 for guiding hot air to be discharged efficiently.

[0033] To achieve rapid and precise assembly, the rear ends of the inner ring 511 and the outer ring 512 are provided with multiple slots 515 that are adapted to the number and position of the connecting posts 41. Through the cooperation of the slots 515 and the connecting posts 41, the sealing shell 5 can be securely assembled to the front end of the motor housing 4.

[0034] In a preferred embodiment, there are three airflow slots 81, the same number as the connecting posts 41 and the slots 515. A locking block 82, adapted to the slot 515, is provided at the tail of each airflow slot 81. When the guide shield 8 engages with the sealing shell 5, the locking block 82 embeds into the corresponding slot 515, achieving circumferential positioning and fixation.

[0035] To reduce airflow resistance and improve heat dissipation efficiency, both the exhaust duct 514 and the intake duct 6 adopt a spiral structure. The spiral shape of the duct guides the air to rotate forward, increases the contact between the airflow and the duct wall, promotes heat exchange, and makes the airflow more concentrated and orderly.

[0036] The working principle of this utility model is briefly described as follows: After the motor starts, the impeller 3 rotates at high speed. On one hand, air is drawn in from the air inlet 11 at the front end of the guide shroud 8 and the air inlet duct 6, forming the main working airflow. On the other hand, the rotation of the impeller 3 generates negative pressure at the airflow groove 81 port on the side wall of the guide shroud 8, drawing in external cold air through the through hole 101 of the bottom cover 10 into the motor. The air flows through the stator 1 and rotor 2 and other heat-generating components, absorbing heat. Under the guidance of the negative pressure at the rear of the impeller 3 and the airflow hole 43 and airflow groove 81, the air enters the air duct 6 for use by the main working airflow, forming a complete and efficient self-circulating heat dissipation system.

[0037] Several points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0038] The above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present utility model should be included in the protection scope recorded in the claims.

Claims

1. A floor scrubber motor with a built-in heat dissipation system, comprising a stator, a rotor, and an impeller, wherein the stator and rotor are coaxially assembled, the impeller is mounted at the front end of the rotor, a motor housing is also assembled on the outside of the stator and rotor, the impeller is located on the outside of the motor housing, a circuit board is also provided on the back of the stator, and a bottom cover is also provided at the rear end of the motor housing, characterized in that: The bottom cover has a through hole, and the front end of the motor housing is also provided with a sealing shell. The impeller is placed inside the front end of the sealing shell. An air inlet, a fan shroud, and a guide shroud are connected in sequence to the front end of the impeller. The front ends of the air inlet and the guide shroud are both provided with matching air inlets. The rear end of the guide shroud is engaged with the sealing shell to cover the fan shroud. At least one airflow groove is provided on the side wall of the guide shroud. The airflow groove is connected to the motor housing. External air is introduced through the negative pressure environment at the port of the airflow groove to dissipate heat through the motor.

2. The floor scrubber motor with a built-in heat dissipation system according to claim 1, characterized in that: The front surface of the motor housing is provided with multiple connecting posts, and the outer sides of the multiple connecting posts are connected to a connecting ring coaxial with the motor housing. Each of the connecting posts is provided with an airflow hole, which penetrates the motor housing and the connecting ring and is used to connect to the airflow slot to deliver air.

3. The floor scrubber motor with a built-in heat dissipation system according to claim 2, characterized in that: The sealing shell includes a rear snap-fit ​​part, a positioning ring, and a front snap-fit ​​part arranged in sequence. The rear snap-fit ​​part is connected to the front end of the motor housing, the front snap-fit ​​part is used to assemble the air inlet duct, and the thickness of the positioning ring is higher than that of the rear snap-fit ​​part.

4. A floor scrubber motor with a built-in heat dissipation system according to claim 3, characterized in that: The rear snap-fit ​​portion includes an inner ring and an outer ring, with a guide plate provided between the inner and outer rings to form an exhaust duct.

5. A floor scrubber motor with a built-in heat dissipation system according to claim 4, characterized in that: The inner and outer rings are provided with multiple slots at their rear ends that are adapted to the connecting posts, so as to assemble the sealing shell onto the front end of the motor housing.

6. A floor scrubber motor with a built-in heat dissipation system according to claim 4, characterized in that: The number of airflow slots is three, the same as the number of connecting columns and slots. Each airflow slot has a locking block at its tail that is compatible with the slot.

7. A floor scrubber motor with a built-in heat dissipation system according to claim 3, characterized in that: The connecting ring, positioning ring, and fan cover have the same outer diameter and are flush with each other on their outer surfaces after assembly.

8. A floor scrubber motor with a built-in heat dissipation system according to claim 4, characterized in that: Both the exhaust duct and the air inlet duct have a spiral structure.

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