CN209938223U

CN209938223U - Universal wheel for foldable draw-bar box

Info

Publication number: CN209938223U
Application number: CN201920393116.4U
Authority: CN
Inventors: 李晓虹; 刘克福
Original assignee: Xihua University
Current assignee: Xihua University
Priority date: 2019-03-27
Filing date: 2019-03-27
Publication date: 2020-01-14
Anticipated expiration: 2029-03-27

Abstract

The utility model discloses a folded cascade universal wheel for draw-bar box relates to draw-bar box technical field, and the universal wheel is bumped bad problem easily when having solved draw-bar box consignment, adopts beta structure can furthest reduce the box inner space that the installation universal wheel was crowded to account for, improves the effective volume of case. 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 rotating shaft, the rotary arm can rotate within 90 degrees around the rotating shaft, and the circumferential positioning of the T-shaped support frame is realized by matching a rotary positioning boss of the T-shaped support frame with a rotary positioning groove I or a rotary positioning groove II of the rotary arm. The wheels are pulled by external force 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, the rotary arm is rotated to the horizontal position, and then the positioning pin is locked to fold and withdraw the universal wheel. The utility model is used for on the draw-bar box.

Description

Universal wheel for foldable draw-bar box

Technical Field

The utility model relates to a draw-bar box technical field, in particular to folded cascade is universal wheel for draw-bar box.

Background

The draw-bar box is a luggage box provided with a draw bar and casters, is convenient and labor-saving in use, and is widely used when people go on a trip and travel. The casters used by the draw-bar box generally comprise fixed casters and movable casters, and the mounting bracket of the fixed casters cannot rotate, so that the direction is not easy to control when the draw-bar box moves. The movable caster, so-called universal wheel, means a bracket on which a caster wheel is mounted, which can rotate 360 degrees in the horizontal direction so that the rolling direction of the wheel automatically adapts to the moving direction of the box or load. At present, the known universal wheels of the draw-bar box are mostly installed and fixed on the lower surface of the box body and cannot be stretched or folded. When the draw-bar box is shipped in an airport, workers carry the box and the box is transported to a turning place on a conveyor belt, the universal wheels easily touch other boxes or objects, and the risk that the universal wheels are damaged exists.

Chinese patent (application publication No. CN 109353171A) discloses a telescopic universal wheel, Chinese patent (application publication No. CN 109156954A) discloses a trolley case with telescopic casters for convenient classification, the two structures can realize the telescopic of the universal wheel, and the universal wheel is ensured to be retracted within the range of a machine body or a case body during retraction. But in order to avoid the box to splash water and dirty when friction between on uneven road surface and the ground and through ponding hole, must make the box leave ground certain height when the universal wheel stretches out, and this makes the flexible stroke of universal wheel can not be too little, leads to whole telescopic machanism to crowd to account for the box inner space great, has influenced the effective volume of box.

Disclosure of Invention

The utility model aims to solve the technical problem that a folded cascade universal wheel for draw-bar box is provided to solve the draw-bar box and probably be bumped bad problem when the airport is consigned, the existing certain safe height of box off the ground when guaranteeing simultaneously that the draw-bar box universal wheel stretches out makes the crowded box inner space that accounts for of universal wheel as far as possible little during the withdrawal again.

The utility model provides a technical scheme that technical problem adopted does: the utility model provides a folded cascade universal wheel for draw-bar box, includes rotation support frame, swinging boom, T type support frame, be equipped with an eccentric mount pad on the rotation support 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 through the pivot with the mount pad of rotation support frame, wears the rotational position that the swinging boom was fixed to the locating pin hole of swinging boom in the middle of one, locating pin one end is equipped with the screw thread, and the other end is equipped with a reducing step, little in the middle of the big of a locating pin hole both ends.

The utility model discloses a rotary positioning support frame, including the swinging boom, swinging boom other end internally mounted has T type support frame, and T type support frame can make a round trip to slide in the downthehole of swinging boom, and the outward flange end of swinging boom is equipped with along axis symmetry's rotational positioning recess one and rotational positioning recess two respectively, and rotational positioning recess one and rotational positioning recess two are 90 vertical distributions, be equipped with the rotational positioning boss of symmetry on the T type support frame, when the rotational positioning boss entered into rotational positioning recess one or rotational positioning recess two, realize the circumference location of T type support frame.

The T-shaped support frame is internally provided with a spring, a guide screw rod is arranged in the spring, a threaded end of the guide screw rod penetrates through a hole in 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 rod, and wheels are respectively arranged on two symmetrical supporting rods of the T-shaped support frame.

Compared with the prior art, the beneficial effects of the utility model are that: within the scope of the box can be folded and withdrawed to the universal wheel of draw-bar box, the universal wheel has been avoided bumping bad when the artifical transport of draw-bar box consignment in the airport and conveyer belt conveying, can guarantee again that the box stands ground when the universal wheel is opened and have a take the altitude, the box of making dirty with splashing when having avoided the box on uneven road surface and ground between friction and through ponding hole, simultaneously owing to adopt beta structure, furthest has reduced the crowded box inner space who accounts for of installation universal wheel, under the condition that the appearance size is the same, the effective volume of box has been improved.

Drawings

Fig. 1 is a schematic structural view of the universal wheel of the present invention.

Fig. 2 is a sectional view a-a in fig. 1.

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

Fig. 4 is a schematic view of the installation and the cooperation of the rotary support frame, the rotary 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 wheels are opened.

Fig. 6 is a schematic view of the overall structure of the trolley case when the universal wheels are folded and retracted.

In the figure: the bearing comprises a wheel 1, a bearing baffle 2, a screw I3, a bearing 4, a spring collar 5, a rotating shaft 6, a reducing step 7, a rotary support 8, a positioning pin 9, a rotating arm 10, a spring 11, a T-shaped support 12, a guide sleeve 13, a guide screw 14, a rotary positioning boss 15, a rotary positioning groove I16, a positioning pin I17, a rotary positioning groove II 18, a rotating shaft hole I19, a rotating shaft hole II 20, a positioning pin hole II 21, a mounting seat 22, a pull rod 23 and a box body 24.

Detailed Description

The technical solution of the present invention will be further explained 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 rotating arm 10 and a T-shaped support frame 12, an eccentric mounting seat 22 is arranged on the rotary support frame 8, a second rotating shaft hole 20 and a second positioning pin hole 21 are arranged on the mounting seat 22, one end of the rotating arm 10 is provided with a rotating shaft hole I19 and a circular arc-shaped positioning pin hole I17, the rotating arm 10 is connected with a mounting seat 22 of the rotary support frame 8 through the rotating shaft 6, a positioning pin 9 penetrates through the middle of the positioning pin hole I17 of the rotating arm 10 to fix the rotating position of the rotating arm 10, one end of the positioning pin 9 is provided with threads, the other end of the positioning pin is provided with a reducing step 7, the two ends of the positioning pin hole I17 are large, the middle is small, the big holes at the two ends of the positioning pin are matched with the positioning pins 9 to limit the rotating position of the rotating arm 10, and the small sliding groove in the middle arc shape is matched with the reducing step 7 of the positioning pin to play an auxiliary guiding role when the rotating arm 10 rotates.

The utility model discloses a rotary arm 10, including rotary arm 10, rotary arm 10 other end internally mounted have T type support frame 12, and T type support frame 12 can make a round trip to slide in rotary arm 10's downthehole, and rotary arm 10's outward flange end is equipped with respectively along axis symmetry's rotational positioning recess one 16 and rotational positioning recess two 18, and rotational positioning recess one 16 and rotational positioning recess two 18 are 90 vertical distributions, be equipped with the rotational positioning boss 15 of symmetry on T type support frame 12, when rotational positioning boss 15 entered into rotational positioning recess one 16 or rotational positioning recess two 18, realize T type support frame 12's circumferential direction location.

The utility model discloses a T type support frame 12, including T type support frame 12, spring 11 has a leading screw 14 inside, and the hole that 12 tip of T type support frame were passed to the screw thread end of leading screw 14 is fixed through threaded connection with swinging boom 10, and the terminal surface contact of spring 11 one end and the interior pore wall of T type support frame 12, the other end and the contact of the guide sleeve 13 of cover on leading screw 14 install wheel 1 on two symmetrical branches of T type support frame 12 respectively.

When the universal wheel stretches out and normally works, the rotating arm 10 is opened as shown in fig. 1, the rotating arm 10 can be fixed by screwing the positioning pin 9 at the moment, the T-shaped support frame 12 is pressed in a hole of the rotating arm 10 under the action of the spring 11, and the rotating positioning boss 15 just enters the first rotating positioning groove 16, so that the circumferential positioning of the T-shaped support frame 12 is realized. When the rotating arm 10 and the T-shaped support frame 12 are fixed well according to the figure 1, the universal wheel can work normally.

The universal wheel is folded and retracted in two steps: first step, pull wheel 1 through the manpower and drive the downthehole past slip of 12 clumps of swinging boom 10 of T type support frame, the spring is compressed, rotational positioning boss 15 withdraws from rotational positioning recess 16, then rotate T type support frame 12, when turning to 90, rotational positioning boss 15 just aligns with rotational positioning recess two 18, loose one's hand this moment, T type support frame 12 is under spring 11's resilience effect, rotational positioning boss 15 enters into rotational positioning recess two 18, circumference when T type support frame 12 has realized the universal wheel and has withdrawed this moment is fixed. And secondly, the butterfly-shaped shifting piece at the end of the positioning pin 9 is manually rotated to retreat the positioning pin 9, when the reducing step 7 of the positioning pin 9 retreats to the first positioning pin hole 17 of the rotating arm 10, the rotating arm 10 can be rotated to be folded and withdrawn, when the rotating arm 10 rotates to the horizontal position, the positioning pin 9 is screwed down to fix the rotating arm 10, and the withdrawing and fixing of the universal wheel are realized. The retracted state of the universal wheel is shown in fig. 3.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a folded cascade universal wheel for draw-bar box, includes gyration support frame (8), swinging boom (10), T type support frame (12), its characterized in that: be equipped with an eccentric mount pad (22) on gyration support frame (8), be equipped with pivot hole two (20) and locating pin hole two (21) on mount pad (22), the one end of swinging boom (10) is equipped with pivot hole one (19) and convex locating pin hole one (17), and swinging boom (10) link to each other through mount pad (22) of pivot (6) and gyration support frame (8), wears locating pin (9) in the middle of the locating pin hole one (17) of swinging boom (10) to fix the rotational position of swinging boom (10), locating pin (9) one end is equipped with the screw thread, and the other end is equipped with a reducing step (7), the big centre in locating pin hole one (17) both ends is little.

2. The universal wheel for the foldable draw-bar box according to claim 1, wherein: the utility model discloses a rotating arm (10) is characterized in that rotating arm (10) other end internally mounted has T type support frame (12), and T type support frame (12) can make a round trip to slide in the downthehole of rotating arm (10), and the outward flange end of rotating arm (10) is equipped with respectively along axis symmetry's rotational positioning recess one (16) and rotational positioning recess two (18), and rotational positioning recess one (16) and rotational positioning recess two (18) are 90 vertical distribution, be equipped with the rotational positioning boss (15) of symmetry on T type support frame (12).

3. The universal wheel for the foldable draw-bar box according to claim 1, wherein: t type support frame (12) internally mounted has spring (11), and there is a lead screw (14) spring (11) inside, and the screw thread end of lead screw (14) passes the hole of T type support frame (12) tip and is fixed through threaded connection with swinging boom (10), and the terminal surface contact of hole wall in spring (11) one end and T type support frame (12), the other end and cover uide bushing (13) contact on lead screw (14), install wheel (1) on two symmetrical branches of T type support frame (12) respectively.