CN214564356U - Universal wheel steering structure - Google Patents

Abstract

The utility model relates to an universal wheel technical field discloses an universal wheel turns to structure includes fixed square plate, is used for connecting the landing leg of universal wheel, is used for making landing leg and fixed square plate relative pivoted bearing, and the bearing is including inner circle and the outer lane that can rotate relatively, and one of them person and landing leg fixed connection, another person and fixed square plate relatively fixed in inner circle and outer lane to make fixed square plate and landing leg relative rotation. So set up, realize the relative rotation of fixed square plate and landing leg through the bearing, fixed square plate, the landing leg all can closely cooperate with the bearing, for the ball adds orbital structure this scheme need not consider the problem of fit clearance between each part, product quality more can be guaranteed, universal wheel among the prior art turns to the structure and realizes support and fixed square plate with the help of the ball and turn to, the too big product damage that drops that leads to the ball of the fit clearance about support and fixed square plate, or the fit clearance undersize leads to rotatory dumb to lose the problem of turning to the function.

Description

Universal wheel steering structure

Technical Field

The utility model relates to an universal wheel technical field, more specifically say, relate to an universal wheel turns to structure.

Background

The universal wheel steering structure in the prior art realizes the steering of the universal wheel by means of balls, and as shown in fig. 1, the universal wheel steering structure comprises a fixed square plate 1, rivets 5, large balls a, a large wave plate b, supporting legs 2, small balls c and a small wave plate d, wherein the supporting legs 2 are connected to the large wave plate b, and the fixed square plate 1, the large wave plate b and the small wave plate d are connected through the rivets 5.

Be equipped with the track on the fixed square plate 1, be equipped with down the track on the big ripples dish b, because big ball a rotates, all there is the clearance between big ball a and fixed square plate 1, the big ripples dish b, and big ball a and last track and the contact surface between the track down is more good less, so, in order to increase the interval between track, lower track and the big ball a, inevitably lead to the fixed square plate 1 and big ripples dish b between have about rock the clearance. In the same way, be equipped with the wavelet dish track on the wavelet dish d, also there is the clearance of rocking from side to side between big wave dish b and the wavelet dish d, in order to guarantee in a flexible way, still there is the clearance of rocking from top to bottom between wavelet dish d and the big wave dish b, so, big wave dish b, wavelet dish d, the equipment deviation between little ball c and the landing leg 2 four causes the fixed square plate 1 of product and the upper and lower clearance between the landing leg 2 is unstable, often appear the cooperation tension lead to rotatory not smooth even can not rotate, or the too big problem that leads to the ball to drop in the cooperation clearance. Therefore, how to solve the problem that the universal wheel steering structure in the prior art realizes steering by means of balls, the balls fall off and the products are damaged due to overlarge left, right, upper and lower fit clearance between the support legs and the fixed square plate, or the rotation is inflexible due to the overlarge fit clearance and the steering function is lost is a technical problem which needs to be solved by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a universal wheel turns to structure realizes turning to with the help of the ball with the universal wheel who solves among the prior art turns to the structure, and the too big ball product damage that drops that leads to in the fit clearance about landing leg and the fixed square plate, or fit clearance undersize leads to rotatory inflexible problem that loses the steering function. The utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.

The utility model provides an universal wheel turns to structure, include: the supporting leg comprises a fixed square disc, a supporting leg used for being connected with a universal wheel and a bearing used for enabling the supporting leg and the fixed square disc to rotate relatively, wherein the bearing comprises an inner ring and an outer ring which can rotate relatively, one of the inner ring and the outer ring is fixedly connected with the supporting leg, and the other one of the inner ring and the outer ring is fixed relatively to the fixed square disc, so that the fixed square disc and the supporting leg rotate relatively.

Preferably, the bearing further comprises a limiting gasket and a fastener, the inner ring of the bearing is relatively fixed with the fixed square disc, two ends of the inner ring respectively abut against the fixed square disc and the limiting gasket, and the fastener is used for fastening and connecting the fixed square disc and the limiting gasket, so that the inner ring of the bearing is relatively fixed with the fixed square disc.

Preferably, still include fixed connection be in bearing protecting cover on the landing leg, the bearing is located inside the bearing protecting cover, in order to prevent the bearing exposes, the bearing protecting cover with the bearing outer lane fixed connection so that the outer lane with the landing leg, the fastener passes in proper order fixed square dish the bearing spacing gasket with the bearing protecting cover, in order to connect fixed square dish with the bearing protecting cover.

Preferably, the supporting leg and the bearing protecting cover are fixedly connected by welding or integrally forming.

Preferably, a dustproof ring is arranged between the fixed square disc and the bearing protecting cover.

Preferably, the dust ring is an elastic sealing ring.

Preferably, the fixed square plate is provided with an outer limiting groove for positioning the dust ring, and the outer limiting groove is a protruding structure arranged on the fixed square plate.

Preferably, the fixed square disc is provided with an inner limiting groove for limiting the bearing.

Preferably, the bearing is internally provided with a deformation-preventing limiting pipe.

Preferably, the bearing is a turntable bearing or an angular contact ball bearing with transverse and radial bearing force and impact resistance.

The utility model provides an among the technical scheme, universal wheel steering structure includes fixed square plate, is used for connecting the landing leg of universal wheel, is used for making landing leg and fixed square plate relatively pivoted bearing, and the bearing is including inner circle and the outer lane that can relatively rotate, one of them person and landing leg fixed connection, another person and fixed square plate relatively fixed in inner circle and outer lane to make fixed square plate and landing leg relatively rotate. So set up, realize the relative rotation of fixed square plate and landing leg through the bearing, fixed square plate, the landing leg all can closely cooperate with the bearing, for the ball adds orbital structure this scheme need not consider the problem in fit clearance, and it is more stable than ball and track structure technology, product quality can more be guaranteed, universal wheel among the prior art turns to the structure and realizes the support with the help of the ball and turn to with fixed square plate, the too big product damage that leads to the ball to drop of support and fixed square plate about the fit clearance, or fit clearance undersize leads to rotatory inflexible problem that loses the steering function.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a steering structure of a universal wheel in the prior art;

fig. 2 is a schematic structural view of a universal wheel steering structure according to a first embodiment of the present invention;

fig. 3 is a schematic structural view of a universal wheel steering structure according to a second embodiment of the present invention;

fig. 4 is a schematic structural view of a steering structure of a universal wheel according to a third embodiment of the present invention;

FIG. 5 is an exploded view of the steering structure of the universal wheel according to the embodiment of the present invention;

fig. 6 is a schematic structural view of a fixed square plate in the embodiment of the present invention;

fig. 7 is a sectional view of the fixed square plate in the embodiment of the present invention.

In FIGS. 1-7:

1. fixing the square plate; 11. an outer limiting groove; 12. an inner limiting groove; 13. fixing screw holes; 2. a support leg; 3. A bearing; 31. an inner ring; 32. an outer ring; 4. a limiting gasket; 5. riveting; 6. a bearing shield; 7. a dust ring; 8. an anti-deformation limiting pipe; a. a large ball; b. a large wave plate; c. a small ball; d. a small dial.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The purpose of this embodiment is to provide a universal wheel steering structure, solve the problem that the universal wheel steering structure among the prior art realizes turning to with the help of the ball, and the too big ball product damage that results in that the landing leg and the cooperation clearance of fixed square plate about, or cooperation clearance undersize leads to the rotation dumb to lose the function of turning to.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.

Referring to fig. 2-7, in the present embodiment, the steering structure of the universal wheel includes a fixed square plate 1, a leg 2 for connecting the universal wheel, and a bearing 3 for rotating the leg 2 and the fixed square plate 1 relatively, the bearing 3 includes an inner ring 31 and an outer ring 32 capable of rotating relatively, one of the inner ring 31 and the outer ring 32 is fixedly connected to the leg 2, and the other is fixed to the fixed square plate 1, so that the fixed square plate 1 and the leg 2 rotate relatively. Alternatively, the leg 2 may be fixedly connected to the inner ring 31 of the bearing 3, and may also be fixedly connected to the outer ring 32 of the bearing 3. Preferably, the bearing 3 is a bearing 3 with lateral and radial bearing capacity and impact resistance, in this scheme, a turntable bearing or an angular contact ball bearing may be selected, and among them, a thrust angular contact ball bearing in the angular contact ball bearing may be used. So, realize the relative rotation of fixed square plate 1 and landing leg 2 through bearing 3, fixed square plate 1, landing leg 2 all can closely cooperate with bearing 3, add orbital structure this scheme for the ball and need not consider fit clearance's problem, and choose for use ripe technology bearing 3 structure more stable than ball and track structure technology, process and get up to require lowerly to workman's operation level, more can guarantee product quality.

So set up, solved the universal wheel among the prior art and turned to structure with the help of the ball realization support and fixed square plate 1, the too big ball product damage that leads to of cooperation clearance about support and fixed square plate 1, or cooperation clearance undersize leads to the inflexible problem that loses the steering function of rotation.

As an optional implementation manner, the universal wheel steering structure further includes a limit gasket 4 and a fastener, two ends of the inner ring 31 of the bearing 3 respectively abut against the fixed square disc 1 and the limit gasket 4, and the fastener is used for fastening and connecting the fixed square disc 1 and the limit gasket 4, so that the inner ring 31 of the bearing 3 is relatively fixed with the fixed square disc 1. Correspondingly, the inner ring 31 of the bearing 3 is fixedly connected to the leg 2. Alternatively, the fastener may be a rivet 5 or a screw-nut arrangement, for example, a hex rivet 5 or a screw-nut embossed rivet arrangement.

So set up, realize fixed square plate 1 and bearing 3 inner circle 31's relatively fixed through spacing gasket 4, fixed dish and fastener of putting.

As optional embodiment, universal wheel steering structure still includes bearing protecting cover 6 of fixed connection on landing leg 2, bearing protecting cover 6 and bearing 3's outer lane 32 fixed connection, and bearing 3 is located inside bearing protecting cover 6, and the fastener passes fixed square plate 1, bearing 3, spacing gasket 4 and bearing protecting cover 6 in proper order to connect fixed square plate 1 and bearing protecting cover 6. Specifically, the bearing 3 outer ring 32 is provided with a screw hole, and the fixed connection between the bearing 3 outer ring 32 and the bearing protecting cover 6 is realized through a screw, so that the fixed connection between the bearing 3 outer ring 32 and the supporting leg 2 is realized. In one embodiment, as shown in fig. 2, the leg 2 and the bearing shield 6 are fixedly connected by welding. In another embodiment, as shown in fig. 3, the leg 2 and the bearing shield 6 are fixedly connected by integral molding, i.e. the leg 2 and the bearing shield 6 are formed by one-step stamping. In other embodiments, the leg 2 and the bearing shield 6 may be fixedly connected by means of screws or rivets.

So set up, bearing protecting cover 6 is located the bearing 3 periphery, prevents that bearing 3 from exposing for protect bearing 3.

As an alternative embodiment, a dust ring 7 is arranged between the fixed square disc 1 and the bearing protection cover 6. In this scheme, dust ring 7 is the elasticity sealing washer that elastic material made.

So set up, the elastic sealing ring can prevent the dust entering bearing 3.

As an alternative embodiment, as shown in fig. 7, an outer limiting groove 11 for positioning the dust ring 7 is provided on the fixed square plate 1, and the outer limiting groove 11 is a protruding structure provided on the fixed square plate 1. An inner limiting groove 12 for limiting the bearing 3 is arranged on the fixed square disc 1. In the scheme, as shown in fig. 6, a fixing screw hole 13 for connecting a structure to be mounted is formed on the fixing square plate 1 so as to mount the universal wheel on the structure to be mounted.

By the arrangement, the positions of the elastic sealing ring and the bearing 3 can be limited, and the installation is convenient.

As an optional embodiment, a deformation-preventing limiting pipe 8 is arranged in the bearing 3.

So set up, increase the relative position relation of fixed square plate 1, bearing protecting cover 6, spacing gasket 4, prevent to warp.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments. The utility model provides a plurality of schemes contain the basic scheme of itself, mutual independence to restrict each other, but it also can combine each other under the condition of not conflicting, reaches a plurality of effects and realizes jointly.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A universal wheel steering structure characterized by comprising: fixed square dish (1), landing leg (2) that are used for connecting the universal wheel, be used for making landing leg (2) with fixed square dish (1) relative rotation's bearing (3), bearing (3) are including inner circle (31) and outer lane (32) that can relative rotation, inner circle (31) with outer lane (32) one of them with landing leg (2) fixed connection, the other with fixed square dish (1) relatively fixed, so that fixed square dish (1) with landing leg (2) relative rotation.

2. The universal wheel steering structure according to claim 1, further comprising a limit washer (4) and a fastener, wherein the inner ring (31) of the bearing (3) is relatively fixed to the fixed square plate (1), two ends of the inner ring (31) respectively abut against the fixed square plate (1) and the limit washer (4), and the fastener is used for fastening and connecting the fixed square plate (1) and the limit washer (4) so as to relatively fix the inner ring (31) of the bearing (3) to the fixed square plate (1).

3. The universal wheel steering structure according to claim 2, further comprising a bearing protecting cover (6) fixedly connected to the support leg (2), wherein the bearing (3) is located inside the bearing protecting cover (6) to prevent the bearing (3) from being exposed, the bearing protecting cover (6) is fixedly connected to the outer ring (32) of the bearing (3) to enable the outer ring (32) to be fixedly connected to the support leg (2), and the fastening member sequentially passes through the fixed square plate (1), the bearing (3), the limiting gasket (4) and the bearing protecting cover (6) to connect the fixed square plate (1) and the bearing protecting cover (6).

4. The universal wheel steering arrangement according to claim 3, wherein the leg (2) and the bearing shield (6) are fixedly connected by welding or by integral molding.

5. A universal wheel steering arrangement according to claim 3, wherein a dust ring (7) is provided between the fixed square disc (1) and the bearing shield (6).

6. The steering structure for a universal wheel according to claim 5, wherein the dust seal (7) is an elastic seal ring.

7. The steering structure of the universal wheel according to claim 5, wherein the fixed square plate (1) is provided with an outer limiting groove (11) for positioning the dust ring (7), and the outer limiting groove (11) is a raised structure arranged on the fixed square plate (1).

8. The steering structure of a universal wheel according to claim 1, wherein the fixed square plate (1) is provided with an inner limiting groove (12) for limiting the bearing (3).

9. The steering structure of a universal wheel according to claim 1, wherein a deformation-preventing limit pipe (8) is arranged in the bearing (3).

10. The steering arrangement according to claim 1, wherein the bearing (3) is a slewing bearing or an angular contact ball bearing with lateral, radial bearing capacity and with impact resistance.

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