Cleaning type floor washing and sweeping motor

Abstract

The utility model relates to a cleaning type floor washing and sweeping motor which comprises a circuit board, a magnetic ring, a connector, a central shaft, an iron core, a magnetic steel aluminum ring assembly, a hub, a tire, a side cover and a tire cover, the central shaft, the iron core, the magnetic steel aluminum ring assembly, the hub, the tire, the side cover and the tire cover are coaxially arranged, the hub connecting part of the central shaft is sleeved with the hub through the central shaft matching part, the magnetic steel aluminum ring assembly is arranged on the inner diameter face of the hub, the hub is sleeved with the tire, the side cover is connected to the end face of one side of the hub in a pressed mode, and the tire cover is connected to the end face of the other side of the hub in a pressed mode. An oil seal is arranged between the side cover and the iron core, a circuit board groove is formed in the end face of one side of the iron core, the connector is arranged in the iron core, the circuit board is arranged in the circuit board groove, the magnetic ring is arranged on the circuit board, and the cleaning type floor washing and sweeping motor is compact in structure, small in size, high in precision and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of in-wheel motors, in particular to a cleaning floor scrubbing and sweeping motor. Background Art

[0002] An in-wheel motor is a wheel-side transmission mechanism designed by integrating a power system, a transmission system, and a braking system. For an in-wheel motor used in a floor sweeping or scrubbing robot, due to its limited installation space, there are extremely high requirements for its structural compactness and reliability.

[0003] In the prior art, the in-wheel motors used in floor sweeping or scrubbing robots have problems such as large volume and high cost. Summary of the Utility Model

[0004] How to improve the structural compactness of the in-wheel motor to adapt to the limited installation space is a difficult point to be solved. At the same time, optimizing the entire structure of the in-wheel motor, reducing costs, and improving precision also need to be considered. Therefore, in view of these problems, the utility model designs a cleaning floor scrubbing and sweeping motor with a compact structure, small volume, high precision, and low cost.

[0005] The utility model is realized by the following technical solutions: A cleaning floor scrubbing and sweeping motor includes a circuit board, a magnetic ring, a connector, a central shaft, an iron core, a magnet-aluminum ring assembly, a hub, a tire, a side cover, and a tire cover that are coaxially arranged.

[0006] In order to improve the structural compactness of the entire in-wheel motor to adapt to the limited installation space in a floor sweeping or mopping robot, the central shaft has an iron core connection part and a hub connection part. The iron core is sleeved on the iron core connection part of the central shaft through a first bearing and a second bearing. The hub is in a U shape with one side open and a central shaft fitting part extending axially along the other side center. The hub is sleeved on the hub connection part of the central shaft through the central shaft fitting part. The magnet-aluminum ring assembly is arranged on the inner diameter surface of the hub. The tire is sleeved outside the hub. The side cover is tightly connected to one end face of the hub. The tire cover is tightly connected to the other end face of the hub. An oil seal is provided between the side cover and the iron core. A circuit board groove is provided on one end face of the iron core. The connector is arranged inside the iron core. The circuit board is arranged in the circuit board groove. The magnetic ring is arranged on the circuit board.

[0007] Further, the magnet-aluminum ring assembly is in a ring shape. The magnet-aluminum ring assembly includes an aluminum ring and a plurality of magnets. The aluminum ring is evenly provided with a plurality of magnet grooves, and the plurality of magnets are arranged in the magnet grooves.

[0008] In order to reduce costs, the circuit board includes electronic components such as linear Hall, and linear Hall (including programmable linear Hall) is used to replace the magnetic encoder, which is low-cost.

[0009] In order to improve the connection reliability, it further includes an axial locking nut. The diameter of the core connection part of the center shaft is smaller than the diameter of the hub connection part, forming a first limiting step. The inner diameter surface of the core is provided with a second limiting step. One end of the center shaft is provided with a thread, and the other end extends away from the axis with a limiting boss. The other side end face of the hub abuts against the limiting boss, one end of the first bearing abuts against the first limiting step, and the other end abuts against the second limiting step. One end of the second bearing abuts against the second limiting step. The axial locking nut is screwed onto one end of the center shaft and pressed against the other end of the second bearing.

[0010] In order to facilitate connection with corresponding parts of the machine main body, the iron core has an external connection flange. In order to improve the connection strength while ensuring the compactness of the structure, the external connection flange is formed integrally with the iron core.

[0011] The beneficial effects of the utility model are as follows: the cleaning type floor scrubbing and sweeping motor optimizes the hub motor structure and sets the circuit board inside the iron core, so that the controller and the hub motor are made into an integrated structure, which improves the compactness of the structure and greatly reduces the volume and cost; uses a linear Hall to replace the magnetic encoder, which is low in cost; uses the controller to output a PWM signal to control the speed of the motor, replacing the magnetic encoder motor, which is high in precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a front view of the cleaning type floor scrubbing and sweeping motor of the utility model;

[0013] Figure 2 for Figure 1 AA section view;

[0014] Figure 3 It is a schematic diagram of the exploded three-dimensional structure of the cleaning type floor scrubbing and sweeping motor of the utility model;

[0015] In the figure: 1. Circuit board; 2. Magnetic ring; 3. Connector; 4. Center axis; 41. Core connection part; 42. Hub connection part; 43. First limiting step; 44. Limiting boss; 5. Core; 51. Circuit board slot; 52. Second limiting step; 53. External connecting flange; 6. Magnetic steel aluminum ring assembly; 61. Aluminum ring; 611. Magnetic steel slot; 62. Magnetic steel; 7. Hub; 71. Center axis matching part; 8. Tire; 9. Side cover; 10. Tire cover; 11. First bearing; 12. Second bearing; 13. Oil seal; 14. Axial locking nut. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described in detail below in conjunction with 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 making a clearer and more definite definition of the protection scope of the present invention.

[0017] like Figure 1-3 A cleaning type floor scrubbing and sweeping motor shown includes a circuit board 1, a magnetic ring 2, a connector 3, a coaxially arranged central shaft 4, an iron core 5, a magnetic steel aluminum ring assembly 6, a wheel hub 7, a tire 8, a side cover 9 and a tire cover 10. The iron core 5 has an external connecting flange 53, and the external connecting flange 53 is integrally formed with the iron core 5. The circuit board 1 includes electronic components such as linear Hall.

[0018] The center shaft 4 has a core connecting portion 41 and a hub connecting portion 42. The core 5 is sleeved on the core connecting portion 41 of the center shaft 4 through a first bearing 11 and a second bearing 12. The hub 7 is in a U-shape, with an opening on one side and a center shaft matching portion 71 extending axially at the center of the other side. The hub 7 is sleeved on the hub connecting portion 42 of the center shaft 4 through the center shaft matching portion 71.

[0019] The magnetic steel aluminum ring assembly 6 is arranged on the inner diameter surface of the hub 7. The magnetic steel aluminum ring assembly 6 is ring-shaped, including an aluminum ring 61 and a plurality of magnetic steels 62. The aluminum ring 61 is evenly provided with a plurality of magnetic steel grooves 611, and a plurality of magnetic steels 62 are arranged in the magnetic steel grooves 611.

[0020] The tire 8 is sleeved on the outside of the wheel hub 7, the side cover 9 is pressed and connected to the end surface of one side of the wheel hub 7, the tire cover 10 is pressed and connected to the end surface of the other side of the wheel hub 7, an oil seal 13 is provided between the side cover 9 and the iron core 5, a circuit board groove 51 is opened on the end surface of one side of the iron core 5, the connector 3 is arranged in the iron core 5, the circuit board 1 is arranged in the circuit board groove 51, and the magnetic ring 2 is arranged on the circuit board 1.

[0021] It also includes an axial locking nut 14, the diameter of the core connecting part 41 of the central shaft 4 is smaller than the diameter of the hub connecting part 42, forming a first limiting step 43, and the inner diameter surface of the core 5 is provided with a second limiting step 52. One end of the central shaft 4 is provided with a thread, and the other end is provided with a limiting boss 44 extending away from the axial direction, and the other end surface of the hub 7 abuts against the limiting boss 44, one end of the first bearing 11 abuts against the first limiting step 43, and the other end abuts against the second limiting step 52, and one end of the second bearing 12 abuts against the second limiting step 52, and the axial locking nut 14 is screwed on one end of the central shaft 4 and pressed against the other end of the second bearing 12.

[0022] When the cleaning type floor scrubbing and sweeping motor is used, it is connected to the corresponding parts on the equipment through the external connecting flange 53 and the connector 3, and it is energized. Under the joint action of the iron core 5 and the magnetic steel aluminum ring assembly 6, the wheel hub 7 drives the tire 8 to rotate, and the controller on the circuit board 1 outputs a PWM signal to control the speed of the hub motor.

[0023] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "set", "provided with", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A cleaning type floor scrubbing and sweeping motor, characterized in that: It includes a circuit board, a magnetic ring, a connector, a coaxial center shaft, an iron core, a magnet-steel aluminum ring assembly, a hub, a tire, a side cover and a tire cover. The center shaft has an iron-core connecting portion and a hub connecting portion. The iron core is sleeved on the iron-core connecting portion of the center shaft through a first bearing and a second bearing. The hub is U-shaped, with one side open and the other side having a center shaft mating portion extending axially along the center. The hub is sleeved on the hub connecting portion of the center shaft through the center shaft mating portion. The magnet-steel aluminum ring assembly is arranged on the inner diameter surface of the hub. The tire is sleeved outside the hub. The side cover is tightly connected to one end face of the hub. The tire cover is tightly connected to the other end face of the hub. An oil seal is provided between the side cover and the iron core. A circuit board groove is provided on one end face of the iron core. The connector is arranged inside the iron core. The circuit board is arranged in the circuit board groove. The magnetic ring is arranged on the circuit board.

2. The cleaning floor scrubbing and sweeping motor according to claim 1, characterized in that: It further includes an axial locking nut. The diameter of the iron-core connecting portion of the center shaft is smaller than that of the hub connecting portion, forming a first limiting step. The inner diameter surface of the iron core has a second limiting step. One end of the center shaft is provided with a thread, and the other end extends away from the axis direction with a limiting boss. The other end face of the hub abuts against the limiting boss. One end of the first bearing abuts against the first limiting step, and the other end abuts against the second limiting step. One end of the second bearing abuts against the second limiting step. The axial locking nut is screwed on one end of the center shaft and presses against the other end of the second bearing.

3. The cleaning floor scrubbing and sweeping motor according to claim 1, characterized in that: The magnet-steel aluminum ring assembly is annular. The magnet-steel aluminum ring assembly includes an aluminum ring and a plurality of magnet steels. The aluminum ring is evenly provided with a plurality of magnet-steel grooves, and the plurality of magnet steels are arranged in the magnet-steel grooves.

4. The cleaning floor scrubbing and sweeping motor according to claim 1, characterized in that: The iron core has an external connection flange, and the external connection flange is integrally formed with the iron core.

5. The cleaning floor scrubbing and sweeping motor according to claim 1, characterized in that: The circuit board includes a linear Hall.

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