TW201813832A - A cart wheel assembly in which the wheel includes a wheel base, a plurality of balls, a wheel rim, a tire, two positioning rings and two wheel covers - Google Patents

Abstract

A cart wheel assembly includes a wheel frame and a wheel. The wheel frame is constructed from two symmetrical annular hollow ear plates and the top ends of the ear plates are connected by a connecting portion having a width which makes the ear plates spaced apart from each other to have a space for receiving the wheel. There are a plurality of positioning holes and a plurality of inner grooves at periphery of each ear plate. A wheel is disposed in the space. The wheel includes a wheel base having a plurality of staggered semi-circular recesses on its circumference and a plurality of first locking holes on both side walls of the wheel base; a plurality of balls are received within the semi-circular recesses; a wheel rim is a hollow annular structure to cover the balls on the circumference of the wheel base; a tire is a hollow annular structure to cover the circumference of the wheel rim; two positioning rings that one of the positioning rings is disposed on one side of the wheel base, and the other positioning ring is disposed on the other side of the wheel base are used to restrict the position of wheel rim between the positioning rings, and the inner circumferences of the positioning rings have a plurality of concave portions corresponding to the first locking holes and the positioning holes so as to screw the wheel frame, the wheel base and the positioning rings together by locking screws; and two wheel covers, the inner wall of which have a plurality of projected hooks corresponding to the inner recesses and hooked to the inner walls of the ear plates.

Description

Push wheel assembly

The present invention relates to a push wheel assembly, and more particularly to the outer periphery of the wheel seat in the push wheel assembly is arranged by balls arranged alternately.

The trolley system is widely used in markets, stores, fish markets and other places. The wheel system of the conventional trolley includes a wheel frame, a wheel, two bearings and a shaft piece. The wheel frame system extends downward and is provided with two symmetries. The wheel is arranged between the two ear plates, and the shaft center of the wheel is provided with through holes penetrating the two end surfaces, and the bearing holes are respectively provided on the two end surfaces of the wheel. The two bearings are symmetrically installed in the two bearing holes, and the two bearings have bearing holes coaxially connected to the through hole; the shaft is penetrated through the shaft hole and the through hole to closely fit the bearing hole, so that the wheel can pass through Two bearings rotate around the shaft to provide cart movement.

However, if the cart is carrying a heavier item, the force that the shaft member that passes through the wheel is subjected to will be greater, and the shaft member will easily break in the long term.

Herein, it is a main object of the present invention to provide a push wheel assembly that does not require the use of a shaft member to penetrate the wheel and can carry a larger weight.

An object of the present invention is to provide a push wheel assembly in which the outer periphery of a wheel seat is arranged with staggered balls. With such a staggered arrangement, a larger diameter ball can be used, so that the wheel of the present invention can withstand larger Load.

Another object of the present invention is to provide a push wheel assembly that can be locked with any type of cart by screwing.

In order to achieve the above and other objects, the present invention provides a wheel pushing assembly, including: a wheel frame, which is composed of two symmetrical hollow ring-shaped ear plates, and the top ends of the ear plates are connected by a connecting portion having a width The width separates the ear plates from each other and has a space for accommodating wheels. Each of the ear plates has a plurality of positioning holes and a plurality of inner grooves around it. A wheel is placed in the space and the wheel Including: a wheel seat, the outer periphery of which has a plurality of semi-circular grooves staggered, two side walls of the wheel seat have a plurality of first locking holes; a plurality of balls, which are inserted into the semi-circular recesses Inside the groove; a wheel frame, which is a hollow ring structure, to cover the balls of the outer periphery of the wheel seat; a tire skin, which is a hollow ring structure, to cover the outer periphery of the wheel frame; two positioning rings, of which One positioning ring is placed on one side of the wheel seat, and the other positioning ring is placed on the other side of the wheel seat to limit the wheel frame between the positioning rings, within the positioning rings There are a plurality of recesses in the periphery, and these recesses are opposite To the first locking holes and the positioning holes to screw the wheel frame, the wheel seat and the positioning ring with locking screws; and a two-wheel cover, the inner wall of which has a plurality of convex hooks, the Equal convex hooks are corresponding to the inner grooves and hooked to the inner walls of the ear plates.

In one embodiment of the present invention, the two side walls of the wheel seat further have a plurality of positioning grooves, a plurality of second positioning holes, and a plurality of concave buckle grooves.

In an embodiment of the present invention, the positioning ring has a plurality of protruding portions on its inner periphery, and the protruding portions are opposite to the positioning grooves.

In an embodiment of the present invention, the inner walls of the wheel covers further have a plurality of convex parts, the convex parts are locked into the second positioning holes of the wheel base, and the convex hooks are connected with the The inner grooves are correspondingly hooked to the inner walls of the ear plates and abut against the concave buckle grooves.

In an embodiment of the present invention, a connecting member is connected to the connecting portion of the wheel frame to fix a shaft bolt.

In one embodiment of the present invention, the shaft bolt is provided with a thread.

Therefore, the present invention has staggered balls arranged on the outer periphery of the wheel seat, so that the diameter of the groove in which the balls are placed can be made larger to place larger diameter balls, so that the larger diameter balls can withstand greater pressure. , So that the wheel of the present invention can withstand larger loads. In addition, by providing a threaded shaft bolt on the wheel frame, the push wheel assembly of the present invention can be assembled with any type of cart that can be screwed with the thread.

In order to fully understand the purpose, features and effects of the present invention, the following specific embodiments are used in conjunction with the accompanying drawings to make a detailed description of the present invention, which will be described later:

Please refer to FIG. 1, which is an exploded perspective view of a pushing wheel assembly 1 according to the present invention. The pushing wheel assembly 1 includes a wheel frame 10, a wheel 20, and a wheel cover 30.

The wheel frame 10 is composed of two symmetrical hollow ring-shaped ear plates 11, and the top ends of the ear plates 11 are connected by a connecting portion 12 having a width which separates the ear plates 11 from each other and has A space 13 for accommodating the wheel 20 is provided. Each of the ear plates 11 has a plurality of positioning holes 14 and a plurality of inner grooves 15 around the ear plate 11.

The wheel 20 is placed in the space 13. The wheel 20 includes a wheel base 21, a plurality of balls 22, a wheel frame 23, a tire skin 24, and two positioning rings 25.

The wheel base 21 has a plurality of staggered semi-circular grooves 211 on its outer periphery, and two side walls of the wheel base have a plurality of positioning grooves 212, a plurality of first locking holes 213, and a plurality of second The locking holes 214 and a plurality of concave buckle grooves 215. The balls 22 are inserted into the semi-circular grooves 211. The positioning grooves 212 and the first locking holes 213 are semicircular. Since the outer periphery of the wheel seat 211 is provided with staggered semi-circular grooves 211, the diameter of each of the semi-circular grooves 211 can be designed larger than the diameter of the non-staggered grooves. The balls 22 placed in the semi-circular grooves can also be larger, and can carry a larger weight.

The wheel frame 23 is a hollow ring structure to cover the balls 22 on the outer periphery of the wheel base 21;

The tire skin 24 is a hollow ring structure to cover the outer periphery of the wheel frame 23;

One of the positioning rings 25 is placed on one side of the wheel seat 21, and the other of the positioning rings 25 is placed on the other side of the wheel seat 21 to limit the wheel frame 23 to the Wait for positioning ring 25. The inner periphery of the positioning rings 25 has a plurality of semi-circular outer convex portions 251 and inner concave portions 252. The outer convex portions 251 are opposite to the positioning grooves 212 on the side wall of the wheel base 21, so that the The equal positioning ring 25 can be positioned on both sides of the wheel base 21 without being displaced. The outer diameter of the positioning rings 25 is larger than the outer diameter of the wheel base 21, and the outer diameter of the positioning rings 25 is between the inner diameter and the outer diameter of the wheel frame. The wheel seat 21 is limited in the wheel frame 23. The inner concave portions 252 correspond to the first locking holes 213 on the side wall of the wheel base 21, so that the semi-circular first locking holes 213 and the inner concave portions 252 form a circular locking hole. .

The wheel covers 30 are hollow and concave. The inner wall of the wheel covers 30 has a plurality of convex hooks 31 and a plurality of convex pieces 32. The male hook buckles 31 correspond to the inner grooves 15 of the wheel frame 10 and the female buckle grooves 215 of the wheel base 21. The protrusions 32 correspond to the second positioning holes 214 of the wheel base 21.

Please refer to FIG. 2 to FIG. 6 for a series of assembled state diagrams of the wheel assembly 1, and sequentially assemble each component in the order of FIG. 2 to FIG. 6.

First, the balls 22 are inserted into the semicircular grooves 211 of the wheel base 21, and then the wheel base 21 is placed in the wheel frame 23. In this way, the width between the wheel base 21 and the wheel frame 23 is the width of the semi-circular grooves 211 exposed by the balls 22, and when the wheel 20 is pushed, the rolling of the balls 22 To make the wheel 20 rotate.

Second, the positioning rings 25 are placed on both sides of the wheel base 21. The protruding portions 251 of each positioning ring 25 are opposite to the positioning grooves 212 on both sides of the wheel base 21 to position the positioning rings 25 on both sides of the wheel base 21. The inner recessed portions 252 of each of the positioning rings 25 are opposed to the first lock holes 213 on both sides of the wheel base 21 to form a circular lock hole.

Third, the wheel base 21, the wheel frame 23, and the positioning rings 25 assembled together are placed in the tire cover 24, which covers the outer periphery of the wheel frame 23.

Fourth, the wheel base 21, the wheel frame 23, the positioning rings 25 and the tire skin 24 combined are placed in the space 13 of the wheel frame 30. The inner grooves 15 of the wheel frame 10 are aligned with the recessed grooves 215 of the wheel base 21. The positioning holes 14 of the wheel frame 10 are aligned with the first locking holes 213 of the wheel base 21 and the inner recesses 252 of the positioning rings, and the wheel frame 10, The wheel base 21 and the positioning rings 25 are screwed together. Here, the wheel frame 10 and the wheel 20 are locked together.

Fifth, the wheel covers 30 are locked on both sides of the locked wheel frame 10 and the wheel 20. The male hooks 31 on the inner side of each of the wheel covers 30 are aligned with the inner grooves 15 of the wheel frame 10 and the female grooves 215 of the wheel base 21, and the male hooks 31 are hooked to the wheel. The inner wall of the ear plate 11 of the frame 10 abuts into the recessed groove 215 of the wheel base 21. In addition, the convex pieces 32 are locked into the second locking holes 214 of the wheel base 21. At this point, the push wheel assembly 1 of the present invention is assembled.

In addition, the connecting portion 12 of the wheel frame 10 is provided with a pivoting member 121. One end of the pivoting member is fixed with a shaft bolt 122. The upper end of the shaft bolt 122 is threaded. In this way, the pusher wheel assembly 1 of the present invention can be locked with any cart connecting member that can be screwed with the thread on the shaft bolt 122.

The present invention has been disclosed in the foregoing with a preferred embodiment, but those skilled in the art should understand that this embodiment is only for describing the present invention, and should not be interpreted as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to this embodiment should be included in the scope of the present invention. Therefore, the scope of protection of the present invention shall be defined by the scope of the patent application.

1‧‧‧Push wheel assembly

10‧‧‧ round frame

11‧‧‧ ear plate

12‧‧‧ Connection Department

121‧‧‧ Pivot

122‧‧‧ Shaft Bolt

1221‧‧‧Thread

13‧‧‧ space

14‧‧‧ positioning holes

15‧‧‧Inner groove

20‧‧‧ Wheel

21‧‧‧ wheel seat

211‧‧‧Semi-circular groove

212‧‧‧Positioning groove

213‧‧‧first locking hole

214‧‧‧Second positioning hole

215‧‧‧Notch groove

22‧‧‧ball

23‧‧‧ round frame

24‧‧‧tire

25‧‧‧ positioning ring

251‧‧‧ convex

252‧‧‧Inner recess

30‧‧‧Wheel cover

31‧‧‧ convex hook buckle

32‧‧‧ convex

[Fig. 1] It is a three-dimensional exploded schematic view of a pushing wheel assembly of the present invention. [Fig. 2] is a first combination state diagram of a push wheel assembly of the present invention. [Fig. 3] is a second combination state diagram of the push wheel assembly of the present invention. [Fig. 4] is a third combination state diagram of the push wheel assembly of the present invention. [Fig. 5] is a fourth combination state diagram of the push wheel assembly of the present invention. [Fig. 6] is a fifth combination state diagram of the push wheel assembly of the present invention.

Claims (6)

A push wheel assembly includes: a wheel frame composed of two symmetrical hollow ring-shaped ear plates, and the top ends of the ear plates are connected by a connecting portion having a width that separates the ear plates from each other Whereas, there is a space for accommodating wheels, each of which has a plurality of positioning holes and a plurality of inner grooves around it; a wheel, which is placed in the space, the wheel includes: a wheel seat, whose outer periphery has a plurality of staggers A semi-circular groove is provided, and a plurality of first locking holes are provided on both side walls of the wheel base; a plurality of balls are placed in the semi-circular grooves; a round frame is a hollow ring Structure to cover the balls of the outer periphery of the wheel seat; a tire skin which is a hollow ring structure to cover the outer periphery of the wheel frame; two positioning rings, one of which is placed on one side of the wheel seat Side, the other positioning ring is placed on the other side of the wheel seat to limit the wheel frame between the positioning rings, the inner periphery of the positioning rings has a plurality of inner recesses, the inner recesses Correspond to the first locking holes and the positioning holes To screw the wheel frame, the wheel seat and the positioning ring with locking screws; and the second wheel cover, the inner wall of which has a plurality of convex hooks, the convex hooks are corresponding to the inner grooves And hooked to the inner wall of the ear plates. The push wheel assembly according to claim 1, wherein the two side walls of the wheel seat further have a plurality of positioning grooves, a plurality of second positioning holes, and a plurality of concave buckle grooves. The push-wheel assembly according to claim 2, wherein the inner circumferences of the positioning rings have a plurality of convex portions, and the convex portions are opposite to the positioning grooves. The push wheel assembly as described in claim 2, wherein the inner wall of the wheel cover also has a plurality of projections, the projections are locked into the second positioning holes of the wheel seat, and the projection hooks It is corresponding to the inner grooves and hooked to the inner walls of the ear plates and abuts against the concave buckle grooves. The pushing wheel assembly according to claim 1, wherein a connecting member is connected to the connecting portion of the wheel frame to fix a shaft bolt. The push wheel assembly according to claim 5, wherein the shaft is bolted with threads.