CN109774379B

CN109774379B - Universal wheel for foldable draw-bar box

Info

Publication number: CN109774379B
Application number: CN201910234978.7A
Authority: CN
Inventors: 刘克福; 李晓虹
Original assignee: Xihua University
Current assignee: Xihua University
Priority date: 2019-03-27
Filing date: 2019-03-27
Publication date: 2023-08-18
Anticipated expiration: 2039-03-27
Also published as: CN109774379A

Abstract

The invention discloses a universal wheel for a foldable draw-bar box, relates to the technical field of draw-bar boxes, solves the problem that the universal wheel is easy to be damaged when the draw-bar box is transported, and can furthest reduce the internal space of the box occupied by the installed universal wheel by adopting a folding structure, thereby improving the effective volume of the box. The universal wheel comprises a rotary support frame, a rotary arm and a T-shaped support frame, wherein the rotary arm is connected with a mounting seat on the rotary support frame through a rotary shaft, the rotary arm can rotate within a range of 90 degrees around the rotary shaft, and a rotary positioning boss of the T-shaped support frame and a rotary positioning groove I or a rotary positioning groove II of the rotary arm are matched to realize circumferential positioning of the T-shaped support frame. The external force pulls the wheel to drive the T-shaped support frame to slide out and rotate by 90 degrees, so that the rotary positioning boss is matched with the rotary positioning groove II, the positioning pin is loosened, then the rotating arm is rotated to a horizontal position, and the positioning pin is locked to realize folding and retraction of the universal wheel. The invention is used for the draw-bar box.

Description

Universal wheel for foldable draw-bar box

Technical Field

The invention relates to the technical field of draw-bar boxes, in particular to a universal wheel for a foldable draw-bar box.

Background

The draw-bar box is a suitcase provided with the draw bars and the casters, is convenient and labor-saving in use, and is widely used when people go out and travel. The casters used for the draw-bar box are generally provided with a fixed caster and a movable caster, and the mounting bracket of the fixed caster cannot rotate, so that the direction is not easy to control during movement. The movable castor is a universal wheel, and the bracket for mounting the castor wheel can rotate 360 degrees in the horizontal direction so that the rolling direction of the wheel is automatically adapted to the moving direction of the box or the load. The universal wheels of the draw-bar box which are known at present are installed and fixed on the lower surface of the box body, and can not stretch or fold. When the trolley case is carried at an airport, workers carry the case and the case is transported and turned on the conveyor belt, the universal wheels are easy to touch other cases or objects, and the risk that the universal wheels are damaged exists.

Chinese patent (application publication number: CN 109353171A) discloses a telescopic universal wheel, chinese patent (application publication number: CN 109156954A) discloses a telescopic trolley case with casters convenient for classified placement, and the telescopic structure of the universal wheel can realize the telescopic structure of the universal wheel, so that the universal wheel is ensured to retract into the range of a machine body or a box body during retraction. However, in order to avoid the case from being polluted by friction between the case and the ground on an uneven road surface and splashing water when the case passes through ponding pits, the case body must be at a certain height from the ground when the universal wheels extend out, so that the telescopic travel of the universal wheels cannot be too small, the whole telescopic mechanism occupies a larger space in the case body, and the effective volume of the case is affected.

Disclosure of Invention

The invention aims to solve the technical problem of providing a universal wheel for a foldable draw-bar box, so as to solve the problem that the universal wheel is possibly damaged during the transportation of the draw-bar box at an airport, and simultaneously ensure that the box body has a certain safety height from the ground when the universal wheel of the draw-bar box extends out, and the universal wheel can occupy the space in the box body as little as possible when retracting.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a collapsible universal wheel for draw-bar box, includes slewing bearing frame, swinging boom, T type support frame, be equipped with an eccentric mount pad on the slewing bearing frame, be equipped with pivot hole two and location pinhole two on the mount pad, the one end of swinging boom is equipped with pivot hole one and convex location pinhole one, and the swinging boom links to each other with slewing bearing frame's mount pad through the pivot, wears the rotation position of locating pin to fix the swinging boom in the middle of the location pinhole one of swinging boom, locating pin one end is equipped with the screw thread, and the other end is equipped with a reducing step, location pinhole one both ends are big in the middle of being little.

The T-shaped support frame is arranged at the other end of the rotating arm in an internally mounted mode, the T-shaped support frame can slide back and forth in a hole of the rotating arm, a first rotating positioning groove and a second rotating positioning groove which are symmetrical along the axis are respectively arranged at the outer edge end of the rotating arm, the first rotating positioning groove and the second rotating positioning groove are distributed vertically at 90 degrees, symmetrical rotating positioning bosses are arranged on the T-shaped support frame, and when the rotating positioning bosses enter the first rotating positioning groove or the second rotating positioning groove, circumferential positioning of the T-shaped support frame is achieved.

The T-shaped support frame is internally provided with a spring, a guide screw is arranged in the spring, the threaded end of the guide screw penetrates through a hole at the end part of the T-shaped support frame and is fixedly connected with the rotating arm through threads, one end of the spring is in contact with the end face of the inner hole wall of the T-shaped support frame, the other end of the spring is in contact with a guide sleeve sleeved on the guide screw, and wheels are respectively arranged on two symmetrical supporting rods of the T-shaped support frame.

Compared with the prior art, the invention has the beneficial effects that: the universal wheels of the draw-bar box can be folded and retracted within the range of the box body, so that the situation that the universal wheels are damaged when the draw-bar box is transported by manual transportation and conveying belts in airport consignment is avoided, the vertical ground of the box body can be guaranteed to have a certain height when the universal wheels are opened, the box is prevented from being polluted by friction between the box and the ground and splashing water when the box is in a water accumulation hollow state, meanwhile, due to the adoption of a folding structure, the internal space of the box body occupied by the universal wheels is reduced to the greatest extent, and the effective volume of the box is improved under the condition that the external dimensions are the same.

Drawings

Fig. 1 is a schematic view of an opened structure of a universal wheel according to the present invention.

Fig. 2 is a cross-sectional view A-A of fig. 1.

Fig. 3 is a schematic view of the structure of the universal wheel of the present invention when folded and retracted.

Fig. 4 is a schematic diagram of the installation and the cooperation of the revolving support frame, the rotating arm and the T-shaped support frame.

Fig. 5 is a schematic view of the overall structure of the draw-bar box when the universal wheel is opened.

Fig. 6 is a schematic view of the overall structure of the draw-bar box when the universal wheels are folded and retracted.

In the figure: the device comprises a 1-wheel, a 2-bearing baffle, a 3-screw I, a 4-bearing, a 5-spring collar, a 6-rotating shaft, a 7-reducing step, an 8-rotating support frame, a 9-locating pin, a 10-rotating arm, a 11-spring, a 12-T-shaped support frame, a 13-guiding sleeve, a 14-guiding screw, a 15-rotating locating boss, a 16-rotating locating groove I, a 17-locating pin hole I, a 18-rotating locating groove II, a 19-rotating shaft hole I, a 20-rotating shaft hole II, a 21-locating pin hole II, a 22-mounting seat, a 23-pull rod and a 24-box body.

Detailed Description

The technical scheme of the invention is further described below with reference to the accompanying drawings.

Referring to fig. 1-6, a universal wheel for a foldable draw-bar box comprises a rotary support frame 8, a rotary arm 10 and a T-shaped support frame 12, wherein an eccentric mounting seat 22 is arranged on the rotary support frame 8, a rotary shaft hole two 20 and a positioning pin hole two 21 are arranged on the mounting seat 22, a rotary shaft hole one 19 and a circular arc-shaped positioning pin hole one 17 are arranged at one end of the rotary arm 10, the rotary arm 10 is connected with the mounting seat 22 of the rotary support frame 8 through the rotary shaft 6, a positioning pin 9 penetrates through the middle of the positioning pin hole one 17 of the rotary arm 10 to fix the rotating position of the rotary arm 10, one end of the positioning pin 9 is provided with threads, the other end of the positioning pin 9 is provided with a reducing step 7, the two ends of the positioning pin hole one 17 are large and small, the big holes at the two ends of the positioning pin hole are matched with the positioning pin 9 to limit the rotating position of the rotary arm 10, and the small chute in the middle circular arc shape is matched with the reducing step 7 of the positioning pin to play an auxiliary guiding role when the rotary arm 10 rotates.

The T-shaped support frame 12 is arranged at the other end of the rotating arm 10, the T-shaped support frame 12 can slide back and forth in a hole of the rotating arm 10, a first rotary positioning groove 16 and a second rotary positioning groove 18 which are symmetrical along the axis are respectively arranged at the outer edge end of the rotating arm 10, the first rotary positioning groove 16 and the second rotary positioning groove 18 are vertically distributed at 90 degrees, a symmetrical rotary positioning boss 15 is arranged on the T-shaped support frame 12, and when the rotary positioning boss 15 enters the first rotary positioning groove 16 or the second rotary positioning groove 18, the circumferential positioning of the T-shaped support frame 12 is realized.

The T-shaped support frame 12 is internally provided with a spring 11, a guide screw 14 is arranged in the spring 11, the threaded end of the guide screw 14 penetrates through a hole at the end part of the T-shaped support frame 12 to be fixedly connected with the rotating arm 10 through threads, one end of the spring 11 is contacted with the end face of the inner hole wall of the T-shaped support frame 12, the other end of the spring 11 is contacted with a guide sleeve 13 sleeved on the guide screw 14, and wheels 1 are respectively arranged on two symmetrical supporting rods of the T-shaped support frame 12.

When the universal wheel stretches out and works normally, the rotary arm 10 is opened as shown in fig. 1, the rotary arm 10 can be fixed by screwing the positioning pin 9, the T-shaped support frame 12 is pressed in a hole of the rotary arm 10 under the action of the spring 11, and the rotary positioning boss 15 just enters into the rotary positioning groove I16, so that circumferential positioning of the T-shaped support frame 12 is realized. When the rotary arm 10 and the T-shaped support frame 12 are fixed according to FIG. 1, the universal wheel can work normally.

The universal wheel is folded and withdrawn in two steps: in the first step, the wheel 1 is pulled by manpower to drive the T-shaped support frame 12 to slide outwards in the hole of the rotary arm 10, the spring is compressed, the rotary positioning boss 15 withdraws from the first rotary positioning groove 16, then the T-shaped support frame 12 is rotated, when the T-shaped support frame 12 rotates to 90 degrees, the rotary positioning boss 15 is just aligned with the second rotary positioning groove 18, at the moment, the hand is loosened, the T-shaped support frame 12 enters into the second rotary positioning groove 18 under the rebound action of the spring 11, and at the moment, the T-shaped support frame 12 realizes circumferential fixation when the universal wheel is retracted. And secondly, the butterfly-shaped pulling piece at the end of the positioning pin 9 is rotated by manpower, the positioning pin 9 can be retreated, when the reducing step 7 of the positioning pin 9 is retreated to the first 17 of the positioning pin hole of the rotating arm 10, the rotating arm 10 can be rotated to fold and retract, and when the rotating arm 10 is rotated to a horizontal position, the rotating arm 10 can be fixed by screwing the positioning pin 9, so that the retraction and fixation of the universal wheel are realized. The castor retracted state is shown in fig. 3.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. The utility model provides a universal wheel for foldable draw-bar box, includes slewing bearing frame (8), swinging boom (10), T type support frame (12), its characterized in that: an eccentric mounting seat (22) is arranged on the rotary support frame (8), a rotary shaft hole II (20) and a positioning pin hole II (21) are arranged on the mounting seat (22), a rotary shaft hole I (19) and a circular arc-shaped positioning pin hole I (17) are arranged at one end of the rotary arm (10), the rotary arm (10) is connected with the mounting seat (22) of the rotary support frame (8) through a rotary shaft (6), the middle of the positioning pin hole I (17) of the rotary arm (10) passes through a positioning pin (9) to fix the rotating position of the rotary arm (10), one end of the positioning pin (9) is provided with threads, the other end of the positioning pin hole I (17) is provided with a reducing step (7), and the two ends of the positioning pin hole I (17) are large and small;

the T-shaped support frame (12) is arranged in the other end of the rotating arm (10), the T-shaped support frame (12) slides back and forth in a hole of the rotating arm (10), a first rotating positioning groove (16) and a second rotating positioning groove (18) which are symmetrical along an axis are respectively arranged at the outer edge end of the rotating arm (10), the first rotating positioning groove (16) and the second rotating positioning groove (18) are vertically distributed at 90 degrees, and symmetrical rotating positioning bosses (15) are arranged on the T-shaped support frame (12);

the T-shaped support frame (12) is internally provided with a spring (11), the inside of the spring (11) is provided with a guide screw (14), the threaded end of the guide screw (14) penetrates through a hole at the end part of the T-shaped support frame (12) to be fixedly connected with the rotating arm (10) through threads, one end of the spring (11) is contacted with the end face of the inner hole wall of the T-shaped support frame (12), the other end of the spring is contacted with a guide sleeve (13) sleeved on the guide screw (14), and two symmetrical supporting rods of the T-shaped support frame (12) are respectively provided with wheels (1);

when the universal wheel stretches out and works normally, the rotating arm (10) is opened, the positioning pin (9) is screwed to fix the rotating arm (10), the T-shaped supporting frame (12) is pressed in a hole of the rotating arm (10) under the action of the spring (11), the rotary positioning boss (15) just enters the rotary positioning groove I (16), circumferential positioning of the T-shaped supporting frame (12) is achieved, and when the rotating arm (10) and the T-shaped supporting frame (12) are fixed, the universal wheel works normally at the moment;

the universal wheel is folded and withdrawn in two steps: the method comprises the steps that firstly, a T-shaped support frame (12) is driven to slide outwards in a hole of a rotary arm (10) by a manual pulling wheel (1), a spring (11) is compressed, a rotary positioning boss (15) exits a rotary positioning groove I (16), then the T-shaped support frame (12) is rotated, when the T-shaped support frame rotates to 90 degrees, the rotary positioning boss (15) is just aligned with a rotary positioning groove II (18), at the moment, hands are loosened, the T-shaped support frame (12) enters the rotary positioning groove II (18) under the rebound action of the spring (11), and at the moment, the T-shaped support frame (12) realizes circumferential fixation when a universal wheel is retracted; secondly, through the butterfly plectrum of manpower rotation locating pin (9) end, with locating pin (9) back, when reducing step (7) of locating pin (9) is moved back to the first (17) of locating pin hole of swinging boom (10), rotate swinging boom (10) and make it fold and withdraw, when swinging boom (10) rotate to horizontal position, screw up locating pin (9) again and fix swinging boom (10), realized the withdrawal and the fixed of universal wheel.