阅读说明：本技术 一种电动万向轮 (Electric universal wheel ) 是由 苏希俭 于 2019-11-11 设计创作，主要内容包括：本发明公开了一种电动万向轮,由一根车轮轴和两个电动车轮构成,包括：轮胎、轮辋套件、剪力销、制动盘、多片稀土永磁体、车轮轴、固定架、绕组、铁芯、霍尔元件、滚动轴承、唇型密封圈、端盖、高强度螺栓副、O型密封圈、轴套、轴端盖。多片稀土永磁体固定于轮辋内圆表面,构成电动机的外转子；固定架、铁芯、绕组固定到车轮轴上,构成电动机的定子；通过高强度螺栓副、剪力销、端盖和滚动轴承连接外转子和定子,构成了电动机。轮胎和轮辋一起绕车轮轴旋转,构成了电动车轮。每个电动万向轮的电动车轮同向旋转,带动平板车行走；两个电动车轮反向旋转,带动电动万向轮在水平面内回转任意角度,电动车轮再同向旋转,带动平板车回转任意角度。(The invention discloses an electric universal wheel, which is composed of a wheel shaft and two electric wheels, and comprises: the wheel comprises a tire, a rim set, a shear pin, a brake disc, a plurality of rare earth permanent magnets, a wheel axle, a fixing frame, a winding, an iron core, a Hall element, a rolling bearing, a lip-shaped sealing ring, an end cover, a high-strength bolt pair, an O-shaped sealing ring, a shaft sleeve and a shaft end cover. A plurality of rare earth permanent magnets are fixed on the inner circle surface of the rim to form an outer rotor of the motor; the fixed frame, the iron core and the winding are fixed on the wheel shaft to form a stator of the motor; the outer rotor and the stator are connected through the high-strength bolt pair, the shear pin, the end cover and the rolling bearing, and the motor is formed. The tire and rim rotate together about the wheel axis, forming a motorized wheel. The electric wheels of each electric universal wheel rotate in the same direction to drive the flat car to walk; the two electric wheels rotate in opposite directions to drive the electric universal wheels to rotate at any angle in the horizontal plane, and the electric wheels rotate in the same direction to drive the flat car to rotate at any angle.)

1. An electric universal wheel comprising: the wheel comprises a tire, a rim set, a shear pin, a brake disc, a plurality of rare earth permanent magnets, a wheel axle, a fixing frame, a winding, a fractional slot winding iron core, a Hall element, a rolling bearing, a lip-shaped sealing ring, an end cover, a high-strength bolt pair, an O-shaped sealing ring, a shaft sleeve and an axle end cover; a plurality of rare earth permanent magnets are fixed on the inner circle surface of the rim to form an outer rotor of the motor; the fixing frame, the fractional slot winding iron core and the winding are fixed on a wheel shaft to form a stator of the motor; the outer rotor and the stator are connected together through a high-strength bolt pair, a shear pin, an end cover and a rolling bearing to form the motor; the tire and the rim rotate around the wheel shaft together to form the tire type electric wheel; the method is characterized in that: two tire type electric wheels are arranged on one wheel shaft and can actively and reversely rotate to form the electric universal wheel.

2. The electric universal wheel according to claim 1, wherein the wheel shaft is a symmetrically-shaped stepped shaft, the middle part of the shaft is thick, and the two ends of the shaft are gradually tapered like steps.

3. The electric road wheel of claim 1, wherein the two electric wheels are mounted symmetrically on the wheel axis.

4. The electric road wheel of claim 1, wherein the two electric wheels are cantilevered on the wheel axle.

5. The electric universal wheel as claimed in claim 1, wherein a through hole having a relatively large diameter is formed in both end surfaces of the wheel shaft.

6. The electric universal wheel according to claim 1, wherein a structural form of a plurality of rare earth permanent magnets is used.

7. The electric road wheel of claim 1, wherein a fractional slot winding core configuration is used.

8. The electric road wheel of claim 1, wherein the high strength bolt pair extends through the rim.

9. The electric universal wheel as claimed in claim 1, wherein the high-strength bolt pairs and the shear pins are arranged in a plurality at intervals on the circumference of the rim end face.

10. An electric universal wheel according to claim 1, wherein a rim set construction is used.

11. The electric universal wheel of claim 1, wherein an O-ring seal is used.

12. The electric universal wheel according to claim 1, wherein the lip seal is used on one side of the inner ring of the one-side rolling bearing; the lip-shaped sealing ring is used on the circumference of the outer ring; the lip-shaped sealing rings are used on two sides of the inner ring of the rolling bearing on the other side.

Technical Field

The invention relates to an electric universal wheel which is used on a large-scale multi-axle self-propelled flat car and similar platforms.

Background

The universal wheel for walking of the currently used large multi-axle self-propelled hydraulic flat car consists of a walking hydraulic motor and two tyre type wheels. When the flat car needs to run linearly, the two tire type wheels are driven by the walking hydraulic motor to rotate in the same direction; when the flat car needs to rotate, all the universal wheels are driven (or pushed by the oil cylinder) by the rotating hydraulic motor to rotate to the required angles, at the moment, two tire type wheels on each universal wheel perform passive and reverse rotation, and then the two tire type wheels are driven by the walking hydraulic motor to perform same-direction rotation to drive the flat car to rotate.

The defects of the prior art are as follows: in the transmission process, the electric energy is converted into the hydraulic energy, and the hydraulic energy is converted into the mechanical energy for twice energy conversion, so that the energy utilization rate is not high; the transmission efficiency of the hydraulic system is low; the leakage of the hydraulic system is easy to cause environmental pollution; the hydraulic transmission system has high cost; two wheels on each universal wheel can not actively rotate in opposite directions, and can not drive the universal wheels to rotate to the required angles.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an electric universal wheel, which comprises:

rim set, steel material. The combination mode of the rim and related parts facilitates the replacement of the tire;

a tire, a rubber material, mechanically connected to the rim set;

a plurality of rare earth permanent magnets mechanically attached to the inner circumferential surface of the rim set;

the wheel shaft is made of steel materials, and a step type structure in a symmetrical shape is arranged in the inner circle of the rim suite;

a mount mechanically coupled to the wheel axle;

the iron core is made of steel materials and is mechanically connected to the fixed frame;

a winding mechanically coupled to the core;

the Hall element is used for detecting the rotating speed of the wheel and is mechanically connected to the iron core;

the end cover is made of steel materials and is mechanically connected to the rim set in two structural forms;

the high-strength bolt pair is made of steel materials and used for connecting the rim sleeve and the end cover;

an O-ring seal provided to the rim set;

the lip-shaped sealing rings are arranged on the shaft sleeve, and the lip-shaped sealing rings are arranged on the end cover;

a rolling bearing mechanically coupled to the wheel shaft;

a brake disc, of steel material, for braking the motor vehicle wheel, mechanically connected to said end cap;

the bearing comprises a shaft sleeve, a steel material and two structural forms, wherein the shaft sleeve is used for positioning a bearing and is mechanically connected to two end parts of the wheel shaft;

a shaft end cap of steel material for locating a bearing mechanically mounted to the wheel shaft;

the invention relates to an electric universal wheel, which is formed by arranging two electric wheels on a wheel shaft. It has two functions: when the two electric wheels of all the universal wheels rotate in the same direction, the flat car is driven to travel; when the two electric wheels of each universal wheel rotate reversely, the electric universal wheels are driven to rotate to the required angle, and the two electric wheels of all the universal wheels rotate in the same direction to drive the flat car to rotate at any angle. The electric universal wheel is directly driven by electric energy, a hydraulic transmission system and two sets of hydraulic motors are omitted, the defect that the environment is easily polluted due to external leakage of the hydraulic system is overcome, the transmission efficiency and the energy utilization rate are improved, and the cost is reduced. The invention not only overcomes the defects of the prior art, but also simplifies the electrical control.

Both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide an explanation of the invention as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention. In the drawings:

fig. 1 shows one embodiment of the overall structure of the electric universal wheel of the present invention.

Fig. 2 shows a side cross-sectional view of the electric universal wheel of the present invention.

Fig. 3 shows one embodiment of the overall structure of the rim set.

Figure 4 shows a side cross-sectional view of the rim set.

Figure 5 shows a top view of the position of the electric castor on the platform wagon when the platform wagon is travelling straight.

Figure 6 shows a top view of the position of the electric castor on the platform wagon when the platform wagon is in a lateral position.

FIG. 7 is a top view of the position of the electric universal wheels on the flat car as the flat car rotates around a center of a circle outside the flat car body.

FIG. 8 is a top view of the position of the electric castor on the platform wagon as the platform wagon is rotated about a center of the interior of the platform wagon body.

Detailed Description

The same reference numbers will be used throughout the drawings to refer to the same or like parts. Although the terms used are selected from known and used terms, some terms need to be described in connection with the present specification to understand the detailed meanings in the present invention.

Some of the specific details are omitted from the description in order to avoid obscuring or obscuring the focus of the present invention.

Referring to fig. 2, the electric universal wheel 100 mainly includes: the wheel comprises a tire 101, a rim set 102, a shear pin 103, a brake disc 104, a plurality of rare earth permanent magnets 105, a wheel shaft 106, a fixing frame 107, a winding 108, an iron core 109, a Hall element 110, a rolling bearing 111, a lip-shaped sealing ring 112, an end cover 113, a high-strength bolt pair 114, a 0-shaped sealing ring 115, an end cover 116, a shaft sleeve 117, a shaft end cover 118 and a shaft sleeve 119.

Referring to fig. 3, the rim set 102 basically includes: rim 10201, rib one 10202, rib two 10203, wedge sleeve 10204, and stopper 10205.

The tire 101, the rim set 102, and the plurality of rare earth permanent magnets 105 constitute an outer rotor of the motor, and the wheel shaft 106, the holder 107, the iron core 109, and the winding 108 constitute a stator of the motor. The outer rotor and the stator are connected by high-strength bolt pair 114, end cover 113, end cover 116, and rolling bearing 111 to constitute the motor. The tire 101 and the rim set 102 rotate together about the wheel shaft 106, constituting an electric wheel. The electric wheel can be regarded as a deformation body of an outer rotor rare earth permanent magnet motor.

Two electric wheels are mounted on one wheel shaft 106 to constitute the electric universal wheel 100.

For the convenience of installation, the wheel axle 108 is designed as a symmetrically shaped stepped axle, i.e., thick in the middle and tapered step by step at both ends, as required for the strength of the parts and materials. Two electric wheels of the tire type are symmetrically mounted on the wheel shaft 106. Because each motored wheel has only one pivot point on the wheel axle, each motored wheel suspension is mounted at one end of the wheel axle 106.

Two electric wheels in the electric universal wheel 100 are independent motors, and positive and negative connection wires of a power supply are respectively converted in an electric control device, so that the positive rotation or the reverse rotation of each electric wheel can be actively realized. In each electric universal wheel 100, one electric wheel rotates in the forward direction, and the other electric wheel rotates in the reverse direction, so that a turning moment is formed on the electric universal wheel 100, and the electric universal wheel 100 can be driven to turn around the self turning axis to any angle in the horizontal plane. Referring to fig. 5, in this embodiment, all the electric wheels rotate in the same direction and the flat car can move straight when the electric universal wheels 100 are in the position; referring to fig. 6, in this embodiment, all the electric wheels rotate in the same direction and the flat car can move transversely when the electric universal wheels 100 are in the position; referring to fig. 7, in this embodiment, all the electric wheels rotate in the same direction at the position of the electric universal wheel 100, and the flat car can rotate around a certain circle center outside the flat car body by any angle; referring to fig. 8, in this embodiment, all the electric wheels rotate in the same direction at the position of the electric universal wheel 100, and the flat car can rotate around the center of the inside of the flat car body in an arbitrary angle in situ.

In the preferred embodiment, the plurality of pieces of rare earth permanent magnets 105 are used, thereby constituting a multiple-pole motor. The multi-pole motor is characterized by high torque and low rotation speed, so that the electric wheel meets the operation requirements of a flat car.

In the preferred embodiment, the core 109 uses fractional slot winding, i.e. each slot per pole is a fraction, so that the number of slots of the core punching sheet in the electric wheel is small, the torque pulsation caused by the cogging is small, the structure is compact, and the performance is improved.

In the preferred embodiment, the brake disk 104 is mounted on end caps 113, 116. When the electric wheel is braked, a vertical shear moment is generated. The shear moment acts on the end caps 113, 116. In order to ensure that the end cover 113, the end cover 116, the brake disc 104 and the rim set 102 are tightly attached, the three need to be connected by a high-strength bolt pair 114 penetrating through the rim set 102. Further, the high-strength bolt pair 114 and the shear pin 103 are arranged at intervals on the circumferences of the end faces of the end covers 113 and 116, and bear shear moment generated during braking together.

In the preferred embodiment, the type 0 o ring 115 is used to prevent moisture from entering the interior cavity of the rim set 102.

In the preferred embodiment, in order to prevent grease used in the rolling bearing 111 from entering the inner cavity and the outside of the rim set 102, the lip seal 112 is used on one side of the inner ring of the rolling bearing 111 and the lip seal 112 is used on the outer ring circumference; the lip seals 112 are used on both sides of the inner ring of the rolling bearing 111 at the other position.

In the preferred embodiment, a through hole is drilled with a deep hole between the two end faces of the wheel axle 106 for the output passage of the winding 108 leads and the hall element 110 leads.

The industrial tire is large in size, heavy in weight, and stiff, and the tire 101 can be easily detached or attached after the rim set 102 is used. Referring to fig. 3, in the preferred embodiment, the method of mounting the tire 101 on the rim 10201 is: mounting said rib one 10202 to rim 10201; further, the tire 101 is mounted to a rim 10201; further, the second rib 10203 is mounted on the wedge sleeve 10204; further, both the second rib 10202 and the wedge sleeve 10204 are mounted to the rim 10201; at the moment, the tire 101 is not inflated, the rigidity is weak, the tire is easy to deform, the second flange 10203 and the wedge-shaped sleeve 10204 are pushed towards the first flange 10202, the tire 101 is compressed, the clamping groove on the rim 10201 is exposed, and the stopper 10205 is installed in the clamping groove on the rim 10201; further, the tire 101 is inflated, and under the pressure of the internal air, the tire 101 carries the rib one 10202, the rib two 10203 and the wedge sleeve 10204 to move and compact to both sides on the rim 10201. Elastic materials are adhered to the positions, contacted with the rim 10201, of the first rib 10202, the second rib 20203 and the wedge-shaped sleeve 10204, and deform under the pressure of internal air, so that a closed space is formed between the inside of the tire 101 and the rim 10201 and is filled with air, and the electric universal wheel has a damping effect.

The method of removing the tire 101 from the rim 10201 is reversed according to the above steps.

Preferably, the number of the brake disks 104 is 2, and the brake disks are symmetrically distributed on two sides of the electric universal wheel 100.

In summary, the above-mentioned embodiments of the present invention are provided only for illustrating the principle and efficacy of the present invention, and not for limiting the present invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and scope of the present invention as defined by the appended claims.