KR20210067377A - Mecanum wheel with self-deceleration function - Google Patents

Abstract

The present invention relates to a mecanum wheel with a self-deceleration function applied to a vehicle, a mobile robot, a wheelchair and a motorcycle used in an industrial field. The present invention is to provide the mecanum wheel with a self-deceleration function, which can reduce vibrations generated in a vertical direction when in contact with a road surface and can provide power in a decelerated state. The mecanum wheel with a self-deceleration function in accordance with the present invention comprises: a bracket forming a wheel coupling plate at a right angle to a fixed plate; a drive motor installed on the wheel coupling plate; a shaft support portion protruding from the opposite side of the drive motor and formed to protrude from the wheel coupling plate to support a motor shaft drawn out from the drive motor with a first bearing; a hub with a plurality of passive rollers installed on the outer periphery thereof; and a planetary gear-type reducer installed inside the hub to transmit the power of the motor shaft to the hub in a decelerated state while being supported by the first bearing on the shaft support portion.

Description

Mecanum wheel with self-deceleration function

The present invention relates to a Mecanum wheel having a self-deceleration function applied to vehicles, mobile robots, wheelchairs and motorcycles used in industrial fields, and more specifically, to reduce vibrations generated in the vertical direction when in contact with the road surface. It is intended to provide a Mecanum wheel with a self-deceleration function that can provide power in a decelerated state as well as to provide power in a decelerated state.

In general, transport devices such as vehicles, wheelchairs, and motorcycles that support the ground and move through rotating wheels, because a plurality of wheels rotate in the same direction at the end of one rotating shaft, forward and backward movement or turning movement is possible, but , lateral movement or rotational movement without a turning radius at the center of rotation coincident with the center of gravity is not permitted, and diagonal movement is almost impossible.

In order to solve this problem, a Mecanum wheel is provided, and the Mecanum wheel is mounted on a transportation device to move in all directions at a certain position and to rotate in place without a turning radius.

As a prior art of the Mecanum wheel, the Mecanum wheel of Republic of Korea Patent Publication No. B1 10-1133996 (April 2012.04.05) has been proposed, and the configuration of the Mecanum wheel is each of a transport device equipped with a plurality of independent driving motors. In the Mecanum wheel that is individually mounted on the driving motor to move the transport device in all directions, it is formed in the form of a polygonal prism having a plurality of circumferential surfaces and the driving shaft of the driving motor is inserted in the center, It consists of a wheel hub having a driving shaft fastening hole for fixing, and two supports arranged at a predetermined distance apart from each other in a form extending outward on each circumferential surface of the wheel hub. and a wheelbase comprising a plurality of wheel spokes each formed with a roller shaft fastening hole having a central axis inclined at a predetermined angle, wherein the wheelbase is integrally formed with the wheel hub and the wheel spokes as a single mass, , A roller shaft which is inserted into and fastened to each roller shaft fastening hole so that both sides are respectively supported by the two supports; but, on both sides of the roller shaft, a support fastening part which is respectively inserted into and supported on the two supports is formed, the At the inner position of each support fastening part on the roller shaft, a ring-shaped support ring part protrudes to a certain thickness along the circumference of the roller shaft and is supported on the inner surface of each support in a state in which the roller shaft is inserted into the roller shaft fastening hole. Arranged, on the roller shaft at the position where the support ring part is arranged, a thread part is formed along the circumference of the roller shaft, and the support ring part is formed with a roller shaft insertion hole for insertion into the roller shaft in the center, the roller shaft insertion A screw thread meshing with the screw thread portion is formed on the inner diameter of the ball, and is supported on the inner surface of each support while rotationally coupled to the screw thread portion.

As another example, the Mecanum wheel of Republic of Korea Patent Publication (B1)10-1467081 (2014.12.01.) has been proposed, and the configuration includes a hub located in the center; a plurality of supports that are inclined with respect to the rotation axis of the hub and are radially connected to the outer periphery of the hub; and a passive roller that is respectively mounted and supported on the plurality of supports and rotates according to the moving direction of the hub, wherein a cushioning member is provided in the support to reduce vibration when the passive roller comes into contact with the road surface, The support includes: a first member having one end connected to the hub and extending; a second member connected to the other end of the first member and extending at an angle with respect to the longitudinal direction of the first member; and a third member provided in a 'c' shape, the second member connected to one closed side of the shape, and the passive roller mounted at the other open side of the shape; The third member and the first member or the second member are connected, and one end of the buffer member is provided at a connection portion between the first member and the second member, and the other end of the buffer member closes the third member of the support. is provided at a position of 1/4 to 1/2 of the total length of the third member from the opposite end of the portion where the second member and the third member are connected, and the second member and the third member of the support are connected A revolute joint is formed in the portion so that the third member can move in one direction with respect to the second member.

In the case of the conventional Mecanum wheel as described above, most of the configuration is focused on the coupling configuration of the passable roller, etc., and the motor shaft is coupled to the hub to be driven. In order to reduce the driving force provided by the motor shaft, a separate Since the reducer must be provided, there is a problem in that the external appearance increases when the motor and the reducer attached to the Mecanum wheel are mounted together on the outside.

KR 101133996 B1 2012.04.05. KR 101467081 B1 2014.12.01.

Accordingly, the present inventor provides driving force to the Mecanum wheel having a self-deceleration function that can reduce the vibration generated in the vertical direction when in contact with the conventional road surface, and also has a built-in reducer to enable speed control. It is research and development of Mecanum wheel with deceleration function.

That is, in the present invention, a built-in reducer capable of decelerating the driving force input to the inside of a hub having a plurality of passive rollers installed on the outer periphery at a high rate is installed, and a driving motor is installed in a bracket coupled to the hub in a free-rotating state. It has a self-driving self-deceleration function that enables operation of various speeds through the built-in reducer along with the basic function of reducing the vibration generated in the vertical direction when contacting the road surface by allowing the driving force to be input to the speed reducer. The present invention has been completed with the technical problem of the invention in providing a Mecanum wheel.

In the present invention as a means to solve the problem,

a bracket having a wheel coupling plate formed at a right angle to the first fixing plate; a driving motor installed on the wheel coupling plate; a shaft supporting part protruding from the opposite side of the driving motor and protruding from the wheel coupling plate to support the motor shaft drawn out from the driving motor with a first bearing; a hub having a plurality of passive rollers installed on its outer periphery; It is characterized in that it includes a planetary gear type reducer installed inside the hub to transmit the power of the motor shaft to the hub in a decelerated state in a state supported by the first bearing on the shaft supporting part.

Second, the planetary gear-type reducer includes: a first ring gear coupled to the hub so as to be coupled to the shaft by a second bearing; It is characterized in that it consists of a first sun gear to which power of the motor shaft is provided, and a plurality of first planetary gears positioned between the first ring gear and the first sun gear to form a first reduction group.

Third, the planetary gear type reducer is located between a first ring gear coupled to the hub to be coupled to the shaft by a second bearing, a first sun gear to which a driving force is provided, and the first ring gear and the first sun gear a first reduction group consisting of a plurality of first planetary gears; A second ring gear fixedly installed on a shaft support portion so as to be supported by a third bearing on the first ring gear, a second sun gear formed on the motor shaft, and a plurality of positions positioned between the second ring gear and the second sun gear including a second reduction group consisting of a second planetary gear of The first sun gear is characterized in that it is integrally formed with the planetary gear fixture to which the second planetary gear is coupled.

Fourth, the hub for installing the passive roller is divided into a left member and a right member; The left member and the right member are characterized in that they are fixed to each other by the first ring gear and fixing bolts in a state in which both external ends of the first ring gear constituting the reduction gear are fitted.

When the Mecanum wheel having a self-deceleration function provided in the present invention is used, the following effects are obtained.

- Vibration generated in the vertical direction when contacting the road surface can be reduced.

-When applied to various transport devices, the self-driving force is provided, so the hassle of installing a separate driving means can be eliminated.

-Applied to various transport devices, it is easy to control the speed when controlling it through the controller, and it can provide smooth steering by varying the rotational force of the neighboring Mecanum wheel with self-deceleration function.

1 is a perspective view showing a preferred embodiment of a Mecanum wheel having a self-deceleration function provided by the present invention;
Figure 2 is an exploded perspective view of a Mecanum wheel having a self-deceleration function provided by the present invention;
3 is a front cross-sectional view of a Mecanum wheel having a self-deceleration function provided by the present invention;

Hereinafter, a preferred embodiment of the Mecanum wheel having a self-deceleration function provided by the present invention will be described based on the accompanying drawings.

1 is a perspective view showing a preferred embodiment of the Mecanum wheel having a self-deceleration function provided by the present invention, and FIG. 2 is an exploded perspective view of the Mecanum wheel having a self-deceleration function provided by the present invention. 3 is a front sectional view of a Mecanum wheel having a self-deceleration function provided by the present invention, respectively.

The Mecanum wheel 1 having a self-deceleration function provided by the present invention can be applied to vehicles, mobile robots, wheelchairs and motorcycles used in industrial sites used in industrial sites, and occurs in the vertical direction when in contact with the road surface. It is configured to reduce vibration and provide power in a decelerated state.

The present invention relates to a bracket (2), a hub (3) provided with a passive roller (31), a planetary gear type reducer (4) installed inside the hub (3), and a driving motor providing driving force to the reducer (4) It is divided into (5).

The bracket 2 has a fixing plate 21 that can be installed on various mobile robots, etc., is provided on the upper side, and the wheel coupling plate 22 is formed at a right angle to the lower side of the fixing plate 21, and the wheel coupling plate 22 A rib 23 may be further installed between the fixing plate 21 and the fixing plate 21 for the purpose of increasing rigidity.

The wheel coupling plate 22 has a shaft support part 24 protruding to one side, and the shaft support part 24 passes through the shaft hole 25 at the center of the shaft support part 24 .

The drive motor 5 is disposed on the opposite side of the shaft support part 24 to be fixedly installed on the wheel coupling plate 22 , and the motor shaft 51 of the drive motor 5 is drawn out of the shaft support part 24 . It is supported by the first bearing 26 installed in the shaft hole 25 as much as possible.

A second bearing 27 is installed outside the shaft portion 24 , and the first ring gear 41 is coupled to the second bearing 27 . At this time, the first ring gear 41 is coupled to the hub 3 on which the passive roller 31 is installed and rotates together with the hub 3 .

A first sun gear 42 is disposed at the center of the first ring gear 41 , and a plurality of first planetary gears 43 are coupled between the first ring gear 41 and the first sun gear 42 . The hub 3 is driven by having a first reduction group 4-1 that provides the driving force input from the first sun gear 42 to the first ring gear 41 in a decelerated state.

In this case, the first sun gear 42 may be the motor shaft 51 of the driving motor 5 , or may be integrated with the planetary gear fixture 47 of the second reduction group 4-2 to be described later.

That is, the driving force of the driving motor 5 can be provided by decelerating the first deceleration group 4-1. However, when it is desired to transmit the driving force in a further decelerated state, the second deceleration group as described later (4-2) should be further installed inside the hub (3).

In the second reduction group 4-2, a second ring gear 44 is disposed on a side surface of the shaft support part 24 and fixed to the shaft support part 24, and a motor is located at the inner center of the second ring gear 44. A second sun gear 45 formed at the tip of the shaft 51 is disposed, and a plurality of second planetary gears 46 are gear-coupled between the second ring gear 44 and the second sun gear 45 . This causes the driving force input from the second sun gear 45 to be decelerated to the second planetary gear 46 . At this time, the second planetary gears 46 are coupled to the planetary gear fixed body 47 , and the first sun gear 42 is formed on the planetary gear fixed body 47 .

In the second reduction group 4-2 configured as described above, since the first ring gear 41 is in a fixed state, the driving force provided from the driving motor 5 rotates along the second ring gear 44 . It is configured to be output through the planetary gear fixed body 47 in a state decelerated through the planetary gear 46 .

When the second reduction group 4-2 is additionally configured as described above, the third bearing 28 is coupled to the inner side of the first ring gear 41 and the outer side of the second ring gear 44 to form the first ring gear (41) can be supported.

Meanwhile, the hub 3 of the Mecanum wheel 1 having a self-reducing function provided in the present invention is divided into a left member 32 and a right member 33, these left member 32 and right member 33 is provided with bearings 34 for rollers for assembling the passive rollers 31, respectively, and the shafts of both sides of the passive rollers 31 are fitted to the bearings for rollers 34 so that the passive rollers 31 are free-rotating hubs. (3) to be assembled.

In addition, the left member 32 and the right member 33 are connected to the first ring gear 41 and the fixing bolt 6 in a state where both external ends of the first ring gear 41 constituting the reduction gear 4 are fitted. It has a structure that is mutually fixed by

The Mecanum wheel 1 having a self-deceleration function of the present invention configured as described above has a configuration in which a plurality of passive rollers 31 are installed on the outer periphery of the hub 3, and is generated in the vertical direction when in contact with the road surface. Vibration can be reduced, and since the driving motor 5 is provided together, it is possible to provide self-driving force, and in particular, the reducer 4 composed of the built-in first and second reduction groups 4-1 and 4-2 Since it is possible to output at various speeds through this, when it is used as a wheel for various mobile robots or moving equipment used in industrial sites, it is possible to transport goods more safely and to increase the movement efficiency by controlling various speeds.

In the detailed description of the present invention, although specific embodiments are described, various modifications are possible without departing from the scope of the present invention. Therefore, the protection scope of the present invention should not be limited to the described embodiments, and should be defined by the following claims as well as equivalents.

1: Mecanum wheel with self-reducing function 2: Bracket
21: fixed plate 22: wheel coupling plate
23: rib 24: shaft branch
25: shaft hole 26: first bearing
27: second bearing 28: third bearing
3: Hub 31: Passive Roller
32: left member 33: right member
34: Bearing for roller 4: Reducer
4-1: 1st reduction group 4-2: 2nd reduction group
41: first ring gear 42: first sun gear
43: first planetary gear 44: second ring gear
45: second sun gear 46: second planetary gear
47: planetary gear fixed body 5: drive motor
51: motor shaft 6: fixing bolt

Claims (4)

a bracket (2) having a wheel coupling plate (22) formed at a right angle to the fixing plate (21);
a driving motor 5 installed on the wheel coupling plate 22;
A shaft support portion 24 protruding from the opposite side of the drive motor 5 and formed to protrude from the wheel coupling plate 22 so as to support the motor shaft 51 drawn out from the drive motor 5 with the first bearing 26 . )Wow;
a hub 3 provided with a plurality of passive rollers 31 on the outer periphery;
A planetary gear-type reducer 4 installed inside the hub 3 so as to transmit the power of the motor shaft 51 to the hub 3 in a decelerated state while being supported by the first bearing 26 on the shaft support part 24 . ) Mecanum wheel with self-reduction function, characterized in that it includes.
The method of claim 1 ;
The planetary gear type reduction gear 4 includes: a first ring gear 41 coupled to the hub 3 so as to be coupled to the shaft portion 24 by a second bearing 27 ;
a first sun gear 42 to which power of the motor shaft 51 is provided;
Self-reduction function, characterized in that it includes a first reduction group (4-1) composed of a plurality of first planetary gears (43) positioned between the first ring gear (41) and the first sun gear (42) Having Mecanum Wheels.
The method of claim 1 ;
The planetary gear type reducer 4 includes a first ring gear 41 coupled to the hub 3 so as to be coupled to the shaft portion 24 by a second bearing 27, and a first sun gear to which a driving force is provided ( 42) and a first reduction group 4-1 comprising a plurality of first planetary gears 43 positioned between the first ring gear 41 and the first sun gear 42;
A second ring gear 44 fixed to the shaft support 24 so as to be supported by a third bearing 28 on the first ring gear 41, and a second sun gear formed on the motor shaft 51 ( 45) and a second reduction group 4-2 comprising a plurality of second planetary gears 46 positioned between the second ring gear 44 and the second sun gear 45;
The first sun gear (42) is a mecanum wheel having a self-reduction function, characterized in that it is integrally formed with the planetary gear fixture (47) to which the second planetary gear (46) is coupled.
The method of claim 1 ;
The hub (3) for installing the passive roller (31) is divided into a left member (32) and a right member (33);
The left member 32 and the right member 33 are formed by the first ring gear 41 and the fixing bolt 6 in a state in which both external ends of the first ring gear 41 constituting the reduction gear 4 are fitted. Mecanum wheel with self-reduction function, characterized in that it is fixed to each other.

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