CN110834495A - Rubber wheel - Google Patents

Abstract

The invention discloses a rubber wheel, which comprises a bracket, a bearing, an inner spoke and a brake piece, wherein the bearing is arranged on the bracket; the bracket is provided with a shaft barrel; the bearing inner ring is sleeved on the shaft barrel; the inner width is sleeved on the bearing outer ring and is provided with brake convex teeth which are arranged around the rotating center of the bearing at intervals; the brake piece can be movably arranged on the bracket in a locking way, and is provided with a brake structure which can move along with the brake piece so as to be inserted into or separated from the gap of the brake convex teeth. The inner ring of the bearing is sleeved on the shaft barrel, the outer ring is sleeved with the inner spoke, so that the relative rotation of the inner spoke and the bracket is realized, the rotating friction resistance is reduced through the bearing, and the rubber wheel rotates smoothly; the inner frame is provided with a circle of brake convex teeth, the brake piece is inserted into the brake convex teeth through the brake structure to realize the brake of the rubber wheel, the brake of the rubber wheel can be realized through the cooperation of the inner frame and the brake piece, the brake is realized without adding extra accessories, the structure and the volume of the rubber wheel are simplified, the rubber wheel is lighter, and the cost of the rubber wheel is reduced.

Description

Rubber wheel

Technical Field

The invention relates to the field of pulleys, in particular to a rubber wheel.

Background

In life and industrial production, in order to facilitate the movement of an object, a rubber wheel is usually arranged at the bottom of the object, so that the object can be easily pushed, and the acting force required by carrying is reduced; when needs object position is fixed, need the rubber tyer lock to die, so can set up corresponding brake spare on the rubber tyer usually, in order to cooperate the brake spare brake, still can increase a part with brake spare complex on the rubber tyer usually, lead to the rubber tyer overall structure part more, the structure is complicated, and the installation is troublesome, is unfavorable for the lightweight development of rubber tyer.

Disclosure of Invention

The present invention aims to solve the above technical problem at least to some extent. Therefore, the invention provides a light brake rubber wheel.

The technical scheme adopted by the invention for solving the technical problems is as follows: a rubber wheel comprises a bracket, a bearing, an inner spoke and a braking piece; the bracket is provided with a shaft barrel; the bearing inner ring is sleeved on the shaft barrel; the inner width is sleeved on the bearing outer ring and is provided with brake convex teeth which are arranged around the rotating center of the bearing at intervals; the brake piece can be movably arranged on the bracket in a locking way, and is provided with a brake structure which can move along with the brake piece so as to be inserted into or separated from the gap of the brake convex teeth.

The rubber wheel provided by the embodiment of the invention at least has the following technical effects: the inner ring of the bearing is sleeved on the shaft barrel, the outer ring is sleeved with the inner spoke, so that the relative rotation of the inner spoke and the bracket is realized, the rotating friction resistance is reduced through the bearing, and the rubber wheel rotates smoothly; the inner frame is provided with a circle of brake convex teeth, the brake piece is inserted into the brake convex teeth through the brake structure to realize the brake of the rubber wheel, the brake of the rubber wheel can be realized through the cooperation of the inner frame and the brake piece, the brake is realized without adding extra accessories, the structure and the volume of the rubber wheel are simplified, the rubber wheel is lighter, and the cost of the rubber wheel is reduced.

According to some embodiments of the invention, the bracket comprises a web extending radially outwardly from the outer wall of the shaft, the brake member being rotatably mounted on the web.

According to some embodiments of the invention, the outer end of the shaft cylinder is provided with a buckle, the outer wall of the shaft cylinder is provided with a step at an inward interval relative to the buckle, and the bearing is sleeved between the buckle and the step.

According to some embodiments of the invention, the outward side of the buckle is provided with a guide surface for facilitating the installation of the bearing.

According to some embodiments of the invention, the web is provided with a clamping column, the brake piece is provided with two clamping grooves for matching with the clamping column to lock the position of the brake piece, the matching of the two clamping grooves and the clamping column can be switched by rotating the brake piece, and the matching of the two clamping grooves and the clamping column respectively corresponds to the insertion and separation of the brake structure into and from the gap of the brake convex teeth.

According to some embodiments of the invention, the brake lobe is located a distance from the bearing axis of rotation that is less than a distance from a center of rotation of the brake element to the bearing axis of rotation; the periphery of the shaft cylinder and the rotating track profile of the brake structure are provided with an overlapping area, and the clearance between the periphery of the shaft cylinder and the brake convex teeth is smaller than that of the brake structure.

According to some embodiments of the invention, further comprising a gum cover wrapped around the outer periphery of the inner panel.

According to some embodiments of the invention, the inner panel is provided with a limiting groove on the periphery, and the inner ring of the rubber sleeve is provided with a fillet which is matched with the groove and embedded into the groove.

According to some embodiments of the invention, the bearing further comprises a side cover covering the end part of the shaft barrel to cover the outer side of the bearing; and the middle part of the side cover is provided with an inserting sleeve which is inserted into the shaft barrel and is in interference fit with the inner wall of the shaft barrel.

According to some embodiments of the invention, the bearings and the inner web are arranged in two groups and symmetrically along the web.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a sectional view of an embodiment of the present invention in an installed state;

FIG. 2 is a schematic view of the exploded state of FIG. 1;

FIG. 3 is a schematic structural view of the bracket and the brake element of FIG. 1 in an exploded state;

FIG. 4 is a schematic view showing a coupled state of the braking member, the bracket and the braking teeth;

FIG. 5 is a schematic structural view showing another state of connection of the brake element to the bracket;

FIG. 6 is a schematic view of the operation of the brake element and the brake lobe in the condition of FIG. 5;

fig. 7 is a schematic view of the structure of the inner panel shown in fig. 1.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

Referring to fig. 1 to 5, the rubber wheel of the present invention includes a bracket 100, a bearing 200, an inner panel 300, and a brake 400.

The bracket 100 serves as a base body of the rubber wheel, other parts are mounted thereon, and the bracket 100 is also a part connected with an external structure, so that the rubber wheel is applied to various devices, as shown in fig. 1, a connection column 140 is provided on the bracket 100, and a connection hole is provided on the connection column 140 to be connected with the external structure so as to mount the rubber wheel on the corresponding device. The bracket 100 is provided with a shaft barrel 110, and in order to save materials, the shaft barrel 110 is hollow in the middle, and the rubber wheel integrally works by taking the axis of the shaft barrel 110 as a rotating axis. The inner ring of the bearing 200 is sleeved on the shaft barrel 110, and the fit between the inner ring and the shaft barrel 110 can be interference fit. The inner width 300 is coaxially sleeved on the outer ring of the bearing 200, the center of the inner width 300 is provided with an inner wall matched with the outer ring of the bearing 200, the inner width 300 and the outer ring of the bearing 200 can be in interference fit to realize the tight fit effect, in addition, as shown in fig. 7, one end of the inner width 300 is provided with a circle of retaining ring 350, the other end is provided with a plurality of annular convex hulls 340, and two ends of the bearing 200 are limited by the retaining ring 350 and the convex hulls 340 after being embedded into the inner width 300, so that the installation and positioning of the bearing 200 and the inner width 300 are. The inner frame 300 is provided with brake teeth 310 circumferentially spaced around the rotational center thereof, the brake teeth 310 are uniformly spaced, and since the inner frame 300 is rotated relative to the shaft tube 110, in order to prevent rotational friction thereof, the circumferential diameter of the brake teeth 310 is larger than that of the shaft tube 110, and a gap is formed between the brake teeth 310 and the shaft tube 110 to prevent friction. The braking member 400 is movably mounted on the bracket 100 in a locking manner, i.e. the braking member 400 can move relative to the bracket 100 and can be locked in a position, and has a function of locking after moving. The braking member 400 is provided with a braking structure 410 which can move along with the braking member 400 to be inserted into or separated from the gap between the braking convex teeth 310, namely, the braking structure 410 can be inserted into the gap between two adjacent braking convex teeth 310 to lock the inner frame 300 to rotate so as to realize braking (braking state), and the braking structure 410 can be separated from the gap between two adjacent braking convex teeth 310 so that the inner frame 300 can freely rotate (moving state), so that the two states can be switched by the movement of the braking member 400. As shown in fig. 6, the braking structure 410 may be a cylinder, the two sides of the braking convex tooth 310 are provided with circular arcs 311 matched with the cylinder, and when the braking convex tooth 310 rotates, the circular arcs 311 have a certain wrapping and limiting effect on the braking structure 410, so that the braking structure 410 cannot be easily separated from the gap of the braking convex tooth 310 by the rotation of the braking convex tooth 310. The brake piece 400 is inserted into the brake convex teeth 310 through the brake structure 410 to realize the brake of the rubber wheel, the brake of the rubber wheel can be realized through the matching of the inner frame 300 and the brake piece 400, no additional accessory is needed to realize the brake, the structure and the volume of the rubber wheel are simplified, the rubber wheel is lighter, and the cost of the rubber wheel is also reduced.

In some embodiments of the present invention, the bracket 100 includes a web 120 extending radially outward from the outer wall of the shaft 110, the braking element 400 can be rotatably mounted on the web 120, specifically, the web 120 is provided with a first rotation hole 122, the braking element 400 is provided with a second rotation hole 430 aligned and matched with the first rotation hole 122, and the first rotation hole 122 and the second rotation hole 430 are aligned and mounted to allow the braking element 400 to be rotatably mounted on the bracket 100.

In some embodiments of the present invention, the outer end of the shaft tube 110 is provided with the buckle 130, the outer wall of the shaft tube 110 is provided with the step 111 at an inward interval relative to the buckle 130, the bearing 200 is sleeved between the buckle 130 and the step 111, the tight fit and the limit are realized only through interference fit, the installation position and the stability are poor, the bearing 200 can be well limited through the buckle 130 and the step 111, the shaft tube 110 can be made of a plastic material, and the installation is realized by utilizing the elastic deformation capability of the material itself that the bearing 200 passes over the buckle 130. In a further embodiment of the present invention, the outward side of the clip 130 is provided with a guiding surface for facilitating the installation of the bearing 200, and the guiding surface may be an inclined surface or an arc surface, so as to facilitate the pressing in of the bearing 200 to deform the clip under stress, and facilitate the installation of the bearing 200 in place.

In some embodiments of the present invention, the web 120 is provided with the locking post 121, the brake 400 is provided with two locking slots 420 for cooperating with the locking post 121 to lock the position of the brake 400, the two locking slots 420 are arc slots having a contour matching with the locking post 121, and the two locking slots 420 are in arc transition to facilitate the locking post 121 to switch the position between the two locking slots 420. The rotation of the braking member 400 can make the position-locking column 121 be locked into another position-locking slot 420 from one position-locking slot 420, so as to realize the matching switching between the two position-locking slots 420. The two clamping grooves 420 are matched with the clamping columns 121 and respectively correspond to the brake structures 410 which are inserted into the gaps of the brake convex teeth 310 and separated from the gaps of the brake convex teeth 310; as shown in fig. 5, when the position-locking pin 121 is locked into one of the locking slots 420, the brake structure 410 is inserted into the gap between the brake teeth 310, and is in a braking state; as shown in fig. 4, when the clamping post 121 is clamped into another clamping slot 420, the brake structure 410 is separated from the gap of the brake convex teeth 310, and is in an active state, and the position of the brake element is locked by the matching of the clamping slot 420 and the clamping post 121, and since the brake element 400 has only two states, namely an active state and an inactive state, the two clamping slots 420 can realize the corresponding locking of the two states. Due to the design, the brake piece 400 has the position locking capacity and also has the activity space and state switching capacity, the state switching can be realized only by applying a certain force to the brake piece by a person, and the brake piece 400 can be made of PA plastic.

In a further embodiment of the present invention, the distance (i.e., the radius of rotation) from the brake lobe 310 to the axis of rotation of the bearing 200 is smaller than the distance from the center of rotation of the brake element 400 to the axis of rotation of the bearing 200 (i.e., the distance from the first rotation hole 122 to the axis of rotation of the bearing 200), and since the shaft cylinder 110, the bearing 200 and the inner frame 300 are all coaxially disposed, the axis of rotation of the bearing 200, i.e., the axis of the shaft cylinder 110 and the inner frame 300. As shown in fig. 6, arc 403 is an arc centered on the center of bearing 200 and having a radius equal to the distance from the center of rotation of brake element 400 to the axis of rotation of bearing 200. it can be seen that the radius of the first rotation path 302 of brake lobe 310 is less than the distance from the center of rotation of brake element 400 to the axis of rotation of bearing 200. The brake structure 410 is now inserted into the brake lobe 310. When the brake convex tooth 310 rotates counterclockwise, the brake member 400 is not driven by the brake convex tooth 310 to separate from the brake convex tooth 310 due to the outward pulling of the brake structure 410 and the acting force of the clamping post 121 and the clamping groove 420; when the brake convex tooth 310 rotates clockwise, the brake convex tooth 310 drives the brake structure 410 to rotate counterclockwise, the second rotation track 402 is the rotation track of the brake structure 410, when the brake structure 410 rotates counterclockwise, and because the brake structure 410 is abutted against the brake convex tooth 310 and the outer wall of the shaft cylinder 110 at this time, the rotation of the brake structure 410 is interfered by the outer wall of the shaft cylinder 110, so that the brake structure cannot rotate, that is, the outer circumference profile of the shaft cylinder 110 and the second rotation track 402 profile of the brake structure 410 have an overlapping region, so that motion interference can be generated, so that the brake structure cannot rotate continuously, and in addition, in order to avoid the brake structure 410 staying in the gap between the outer circumference of the shaft cylinder 110 and the brake convex tooth 310 to avoid the brake convex tooth 310, so that the brake piece 400 fails, the gap between the outer circumference of the shaft cylinder 110 and the brake convex tooth 310 is smaller than the brake structure 410, so that the brake state is. In a further embodiment of the present invention, in order to make the braking state more stable and the stress more optimized, as shown in fig. 6, the pushing force 301 of the braking teeth 310 on the braking structure 410 can be approximately regarded as a tangent of the first rotating track 302 at the position of the braking structure 410, and the moving direction 401 of the braking structure 410 is a tangent of the second rotating track 402 at the position of the braking structure 410, where the pushing force 301 is perpendicular to the moving direction 401, and the pushing force 301 cannot drive the braking structure 410 to rotate. The closer the angle between the thrust force 301 and the moving direction 401 is to the perpendicular, the smaller the rotation moment of the thrust force 301 is, and the more stable the braking state is. Of course, the thrust force 301 has a better effect when the angle between the thrust force and the moving direction 401 is within the range of 90 degrees +/-20 degrees.

In some embodiments of the invention, the rubber wheel further comprises a rubber sleeve 500, and the rubber sleeve 500 is wrapped on the outer periphery of the inner web 300. In a further embodiment of the present invention, the inner panel 300 is provided with a position-limiting groove 320 on the outer circumference, the inner ring of the rubber sleeve 500 is provided with a fillet 510 matching with the groove 320 and embedded into the groove 320, and the rubber sleeve 500 and the inner panel 300 are tightly connected through the cooperation of the fillet 510 and the groove 320 and can rotate synchronously without relative rotation. The groove 320 is convex and the upper end is open, so that the limiting effect is better. In addition, one end of the periphery of the inner panel 300 facing the bracket 100 is provided with a convex ring 330 protruding outwards, the rubber sleeve 500 is correspondingly provided with a ring groove 520 wrapping the convex ring 330, and tight connection and limitation are realized through the matching of the convex ring 330 and the ring groove 520.

The gum cover 500 can be made of soft rubber PU material, and is assembled with the inner panel 300 into a whole through secondary injection molding, and the gum cover 500 is contacted with the ground to play the effects of buffering and noise reduction.

In order to protect the bearing from direct exposure and dust accumulation, in some embodiments of the present invention, the rubber wheel further includes a side cover 600 covering an end of the shaft cylinder 110 to cover an outer side of the bearing 200; the middle of the side cover 600 is provided with an insert sleeve 610 which is inserted into the shaft tube 110 and is in interference fit with the inner wall of the shaft tube 110, and the outer wall of the insert sleeve 610 is provided with a convex strip 620 so as to realize interference tight fit, and meanwhile, the side cover has an attractive effect, so that a bearing is not directly exposed, and the whole peripheral outline of the rubber wheel is smoother.

As shown in fig. 1, the rubber wheel is designed symmetrically, the whole wheel takes the web 120 as a symmetric center, two sets of bearings 200, inner webs 300, rubber sleeves 500 and side covers 600 are arranged symmetrically along the web 120, the middle part of the brake 400 has a recess for the web 120 to be inserted, the recess is formed by two structural plates 440 at intervals, the second rotating hole 430 and the brake structure 410 are both arranged on the structural plates 440, and in order to avoid structural interference, the web 120 is provided with a recess 123 corresponding to the rotating track of the brake 400 for the brake 400 to rotate between the two states.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A rubber wheel, characterized by comprising:

a bracket (100) having a shaft (110);

the bearing (200) is sleeved with the inner ring on the shaft barrel (110);

the inner spoke (300) is sleeved on the outer ring of the bearing (200) and is provided with brake convex teeth (310) which are arranged around the rotating center of the inner spoke at intervals;

the brake piece (400) is movably arranged on the bracket (100) in a locking way, and is provided with a brake structure (410) which can move along with the brake piece (400) to be inserted into or separated from the gap of the brake convex teeth (310).

2. The rubber wheel according to claim 1, wherein: the bracket (100) comprises a web (120) formed by extending the outer wall of the shaft barrel (110) outwards and radially, and the brake piece (400) is rotatably arranged on the web (120).

3. The rubber wheel according to claim 2, wherein: the outer end of the shaft barrel (110) is provided with a buckle (130), the outer wall of the shaft barrel (110) is provided with a step (111) relative to the buckle (130) at an inward interval, and the bearing (200) is sleeved between the buckle (130) and the step (111).

4. The rubber wheel according to claim 3, wherein: and one outward side of the buckle (130) is provided with a guide surface which is convenient for the installation of the bearing (200).

5. The rubber wheel according to claim 2, wherein: the spoke plate (120) is provided with a clamping column (121), the brake piece (400) is provided with two clamping grooves (420) which are used for being matched with the clamping column (121) to lock the position of the brake piece (400), the two clamping grooves (420) and the clamping column (121) can be switched in a rotating mode through the rotation of the brake piece (400), and the two clamping grooves (420) and the clamping column (121) are matched to correspond to a brake structure (410) respectively to be inserted into gaps of the brake convex teeth (310) and separated from gaps of the brake convex teeth (310).

6. The rubber wheel according to claim 5, wherein: the distance from the brake convex tooth (310) to the rotation axis of the bearing (200) is smaller than the distance from the rotation center of the brake piece (400) to the rotation axis of the bearing (200); the periphery profile of the shaft barrel (110) and the rotation track profile of the brake structure (410) are provided with an overlapping area, and the clearance between the periphery of the shaft barrel (110) and the brake convex teeth (310) is smaller than that of the brake structure (410).

7. The rubber wheel according to claim 2, wherein: the rubber sleeve (500) is further included, and the rubber sleeve (500) is wrapped on the periphery of the inner web (300).

8. The rubber wheel according to claim 7, wherein: the outer periphery of the inner panel (300) is provided with a limiting groove (320), and the inner ring of the rubber sleeve (500) is provided with a fillet (510) which is matched with the groove (320) and embedded into the groove (320).

9. The rubber wheel according to claim 2, wherein: the side cover (600) is covered at the end part of the shaft cylinder (110) to cover the outer side of the bearing (200); the middle part of the side cover (600) is provided with an insert sleeve (610) which is inserted into the shaft barrel (110) and is in interference fit with the inner wall of the shaft barrel (110).

10. Rubber tyre according to any one of claims 2 to 9, characterized in that: the bearings (200) and the inner spokes (300) are arranged in two groups and are symmetrically arranged along the spokes (120).

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