CN219645210U - Draw-bar box with universal wheel protection structure - Google Patents

Abstract

The utility model discloses a draw-bar box with a universal wheel protection structure, which comprises a draw-bar box body, wherein a draw bar is arranged at the top of the draw-bar box body; four buffer devices; four universal wheels, buffer includes the fixed shell, rotatory shell, buffer spring one and buffer axle sleeve, still include fixed branch, connect swing arm and elasticity buffer rod, in daily use, through adopting above-mentioned technical scheme, people drag the pull rod box through the pull rod, the universal wheel encounters impact time, impact force is first absorbed by buffer axle sleeve, the free end of connecting the swing arm swings to rotatory shell simultaneously for elasticity buffer rod pressurized shortens, absorb impact once more, impact force rethread rotatory shell transmits buffer spring one, buffer spring one takes place to warp, absorb impact once more, make impact force obtain multiple weakening, the upper limit and the lower limit of absorption to the impact force that acts on the universal wheel all obtain improving.

Description

Draw-bar box with universal wheel protection structure

Technical Field

The utility model relates to a draw-bar box with a universal wheel protection structure.

Background

The draw-bar box refers to a luggage case having a draw bar and rollers. Is widely used because of convenient use. Meanwhile, the draw-bar box is also provided with a draw bar due to the fact that the draw-bar box is provided with a single-tube draw bar and a double-tube draw bar, and the tubes of the draw bar are also provided with square tubes and round tubes, so that the draw-bar box is convenient to drag during walking, and the burden is greatly reduced. The draw-bar box can be carried by hand or dragged, wheels of the draw-bar box used at ordinary times are basically positioned at the bottom of the box, but the draw-bar box of the basic type is not provided with a wheel buffer protection mechanism, and the wheels are easy to be impacted and damaged in the process of moving the draw-bar box, so that in the prior art, the shock-resistant universal wheel for the draw-bar box disclosed in China patent No. CN211166245U appears, and the shock-resistant universal wheel comprises a wheel body, a bearing, a movable mechanism, a buffer mechanism, a draw-bar box body and a fixing mechanism, wherein the buffer mechanism comprises a baffle plate, a sleeve, a buffer block and a rubber pad, and the buffer block and the rubber pad deform when the wheels are impacted so as to absorb the impact force, so that the impact of the universal wheel is reduced, and the following defects still exist:

the deformation of the buffer block and the rubber pad is limited, the smaller impact is insufficient to deform the buffer block and the rubber pad, the effect is limited when the buffer block and the rubber pad are used for dealing with larger impact, the upper limit and the lower limit of the buffer block and the rubber pad are not high, and the protection effect on the universal wheel is limited.

Disclosure of Invention

The utility model aims to solve one of the technical problems existing in the prior art.

The utility model provides a draw-bar box with a universal wheel protection structure, which comprises:

the top of the draw-bar box body is provided with a draw bar;

the four buffer devices are respectively arranged at the corners of the bottom end of the draw-bar box body;

the four universal wheels are respectively rotatably arranged at the bottom of the corresponding buffer device;

the buffer device comprises a fixed shell, a rotary shell, a buffer spring I and a buffer shaft sleeve.

Further comprises:

the concave part is arranged at the bottom of the draw-bar box body;

the base plate is arranged on the inner wall of the bottom of the draw-bar box and covers the inner wall of the concave part;

wherein, the fixed shell sets up in the depressed part, makes the mutual fixed connection of depressed part, backing plate and fixed shell through a plurality of fastening bolts, and rotatory shell rotatable mounting is in the fixed shell, and buffer spring one sets up between rotatory shell top and fixed shell inner chamber top.

Further comprises:

the fixed support rod is fixedly arranged on one side of the inner wall of the rotary shell, and the lower end of the fixed support rod extends out of the rotary shell;

one end of the connecting swing arm is hinged with the fixed supporting rod through a pin shaft, and the other end of the connecting swing arm is provided with a through hole;

one end of the elastic buffer rod is hinged with the top of the inner cavity of the rotary shell, and the other end of the elastic buffer rod is hinged with the free end of the connecting swing arm;

wherein, the axostylus axostyle rotatable mounting of universal wheel is in the through-hole, and buffer shaft sleeve sets up between axostylus axostyle and the through-hole of universal wheel.

Further comprises:

the wear-resistant bushing is fixedly arranged on the inner ring of the buffer shaft sleeve;

wherein the shaft of the universal wheel is rotatably mounted in the wear-resistant bushing.

Further comprises:

an anti-drop ring groove arranged on the inner ring of the through hole;

wherein, the outer lane of buffering axle sleeve inlays in anticreep annular.

The buffer sleeve includes:

the shaft sleeve body is made of rubber and is sleeve-shaped;

the buffering air bags are uniformly arranged in the peripheral wall of the shaft sleeve body at intervals along the circumferential direction.

The elastic buffer rod includes:

one end of the lower rod is hinged with the free end of the connecting swing arm, and the other end of the lower rod is provided with a sliding hole;

one end of the upper rod is hinged with the top of the inner cavity of the rotary shell;

the sliding rod is far away from the upper rod end and can be inserted into the sliding hole in a sliding way;

the buffer spring II is arranged between the inner end of the sliding rod and the inner end of the sliding hole;

and the buffer spring III is sleeved on the outer side of the sliding rod, and two ends of the buffer spring III are respectively abutted with the opposite end surfaces of the upper rod and the lower rod.

Further comprises:

the limiting ring groove is arranged in the middle of the outer peripheral wall of the rotary shell;

the limiting ring is movably arranged in the limiting ring groove;

the limiting ring is fixedly connected with the fixing shell through a screw, the height of the limiting ring is smaller than that of the limiting ring groove, and the limiting ring can slide up and down in the limiting ring groove and rotate around the limiting ring groove in the circumferential direction.

The limiting ring, the rotating shell, the fixed shell and the backing plate are all made of steel.

The beneficial effects of the utility model are as follows:

1. the fixed shell is firmly connected with the draw-bar box body through the mutual fixed connection of the concave part, the base plate, the fixed shell and the plurality of screws;

2. the impact is dispersed and absorbed section by section through the arrangement of the fixed shell, the rotary shell, the first buffer spring, the buffer shaft sleeve, the fixed support rod, the connecting swing arm and the elastic buffer rod, so that the upper limit and the lower limit of the impact absorption effect are improved, and the universal wheel is fully protected;

3. through the arrangement of the lower rod, the upper rod, the sliding hole, the sliding rod, the buffer spring II, the buffer spring III, the limiting groove and the limiting block, the maximum opening between the connecting swing arm and the fixed supporting rod is limited, and the sum of the elastic force of the buffer spring II and the elastic force of the buffer spring III is smaller than that of the buffer spring I, so that middle-section buffer is formed;

4. through the cooperation of spacing ring, spacing ring and a plurality of screw for rotatory shell can rotate in the fixed shell, and slide to fixed shell inner chamber top when the universal wheel receives great impact, in with impact force conduction to buffer spring one, prevent rotatory shell break away from the fixed shell.

Drawings

FIG. 1 is a front view of a draw-bar box with a universal wheel guard structure in an embodiment of the present utility model;

FIG. 2 is a schematic view of a partial enlarged structure at A in FIG. 1;

FIG. 3 is a schematic view of the cross-sectional structure in the direction B-B in FIG. 2.

Reference numerals

The novel high-strength steel cable comprises a 1-pull rod box body, a 2-universal wheel, a 3-buffer device, a 301-fixed shell, a 302-rotating shell, a 303-buffer spring I, a 304-fixed support rod, a 305-connection swing arm, a 306-through hole, a 4-buffer shaft sleeve, a 401-shaft sleeve body, a 402-buffer air bag, a 5-concave part, a 6-base plate, a 7-elastic buffer rod, a 701-lower rod, a 702-sliding hole, a 703-upper rod, a 704-sliding rod, a 705-buffer spring II, a 706-buffer spring III, an 8-wear-resistant bushing, a 9-anti-falling ring groove, a 10-limit groove, an 11-limit block, a 12-limit ring and a 13-limit ring groove.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly described below with reference to the drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which are obtained by a person skilled in the art based on the embodiments of the present utility model, fall within the scope of protection of the present utility model.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present utility model may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

The server provided by the embodiment of the utility model is described in detail below through specific embodiments and application scenes thereof with reference to the accompanying drawings.

Example 1:

as shown in fig. 1 to 3, an embodiment of the present utility model provides a draw-bar box with a universal wheel protection structure, comprising a draw-bar box body 1, the top of which is provided with a draw bar; four buffer devices 3 are respectively arranged at the corners of the bottom end of the draw-bar box body 1; the four universal wheels 2 are respectively rotatably arranged at the bottoms of the corresponding buffer devices 3, and the buffer devices 3 comprise a fixed shell 301, a rotary shell 302, a buffer spring 303 and a buffer shaft sleeve 4.

Further, the draw-bar box further comprises a concave part 5 which is arranged at the bottom of the draw-bar box body 1; the backing plate 6 is arranged on the inner wall of the bottom of the draw-bar box and covers the inner wall of the concave part 5, the fixed shell 301 is arranged in the concave part 5, the backing plate 6 and the fixed shell 301 are fixedly connected with each other through a plurality of fastening bolts, the rotary shell 302 is rotatably arranged in the fixed shell 301, and the buffer spring I303 is arranged between the top end of the rotary shell 302 and the top end of the inner cavity of the fixed shell 301.

Further, the rotary shell 302 further comprises a fixed support rod 304 fixedly arranged on one side of the inner wall of the rotary shell 302, and the lower end of the fixed support rod extends out of the rotary shell 302; one end of the connecting swing arm 305 is hinged with the fixed supporting rod 304 through a pin shaft, and the other end is provided with a through hole 306; and one end of the elastic buffer rod 7 is hinged with the top of the inner cavity of the rotary shell 302, the other end of the elastic buffer rod is hinged with the free end of the connecting swing arm 305, the shaft rod of the universal wheel 2 is rotatably arranged in the through hole 306, and the buffer shaft sleeve 4 is arranged between the shaft rod of the universal wheel 2 and the through hole 306.

Further, it also includes a wear-resistant bushing 8 fixedly mounted on the inner ring of the buffer sleeve 4, and the axle rod of the universal wheel 2 is rotatably mounted in the wear-resistant bushing 8.

Further, the anti-drop ring groove 9 is arranged on the inner ring of the through hole 306, and the outer ring of the buffer shaft sleeve 4 is embedded in the anti-drop ring groove 9.

In this embodiment of the present utility model, since the above-mentioned structure is adopted, when the universal wheel 2 is subjected to an impact, the impact force is firstly transmitted from the shaft lever of the universal wheel 2 to the buffer sleeve 4, the buffer sleeve 4 is deformed to primarily absorb the impact, and at the same time, the free end of the connecting swing arm 305 swings toward the fixed housing 301, so that the elastic buffer rod 7 is deformed, and the impact is absorbed secondarily, if the impact force is small, the impact force can be completely eliminated in the secondary absorption, if the impact force is large, the impact force acts on the rotating housing 302 through the fixed support rod 304 and the elastic buffer rod 7, so that the impact force rises in the fixed housing 301, the first buffer spring 303 is extruded, and the remaining impact force is finally absorbed through the first buffer spring 303, and the total elastic force of the buffer sleeve 4 and the elastic buffer rod 7 is smaller than the first buffer spring 303, so as to form multiple buffers;

because the wear-resistant bush 8 is fixedly connected with the buffer bush, when the universal wheel 2 rotates, the shaft rod of the universal wheel rubs with the inner wall of the wear-resistant bush 8, so that the buffer bush is prevented from being directly contacted with the shaft rod to cause excessive rapid wear, and the buffer effect is prevented from being influenced;

the anti-drop ring groove 9 can limit the two ends of the buffer sleeve 4, and prevent the buffer sleeve 4 from separating from the through hole 306.

Example 2:

as shown in fig. 2 and 3, in this embodiment, in addition to including the structural features of the foregoing embodiments, the cushion sleeve 4 includes a sleeve body 401 made of rubber, in a sleeve shape; a plurality of cushion air bags 402 are provided in the peripheral wall of the sleeve body 401 at uniform intervals in the circumferential direction.

Further, the elastic buffer rod 7 includes a lower rod 701, one end of which is hinged with the free end of the connecting swing arm 305, and the other end of which is provided with a sliding hole 702; an upper rod 703, one end of which is hinged with the top of the inner cavity of the rotary shell 302; a slide bar 704 slidably inserted into the slide hole 702 at an end remote from the upper bar 703; a second buffer spring 705 disposed between the inner end of the slide bar 704 and the inner end of the slide hole 702; and a third buffer spring 706 which is sleeved outside the slide rod 704, and two ends of which are respectively abutted against opposite end surfaces of the upper rod 703 and the lower rod 701.

Further, the device also comprises a limit groove 10 which is arranged at the bottom end of the fixed support rod 304 and is opposite to the end of the elastic buffer rod 7; the limiting block 11 is fixedly arranged at the end, far away from the buffer shaft sleeve 4, of the connecting swing arm 305 and is in sliding fit with the limiting groove 10.

In this embodiment of the present utility model, since the above-mentioned structure is adopted, when the impact force acts on the universal wheel 2, the impact force is transmitted to the sleeve body 401 through the shaft rod and the wear-resistant bush 8 of the universal wheel 2, so that each buffer air bag 402 in the interior of the sleeve body is deformed, the remaining impact force is transmitted to the free end of the connecting swing arm 305 through the sleeve body 401, so that the connecting swing arm 305 swings towards the fixed shell 301 with the pin shaft as a fulcrum, the upper rod 703 and the lower rod 701 approach each other, the free end of the sliding rod 704 is deep towards the inner end of the sliding hole 702, the buffer spring two 705 and the buffer spring three 706 are deformed to absorb the impact force, so that the impact force is triple weakened, if the remaining impact force is still transmitted to the buffer spring one 303, and the buffer spring two 705 and the buffer spring three 706 release elastic potential energy through the buffer spring one 303 are rotated clockwise around the pin shaft, until the limiting block 11 abuts against the inner end wall of the limiting groove 10, at this time, the buffer spring two 705 and the buffer spring three 706 still have a preload force, and the universal wheel 2 can be supported sufficiently.

Example 3:

as shown in fig. 2, in this embodiment, in addition to the structural features of the foregoing embodiments, a retainer ring groove 13 is provided in the middle of the outer peripheral wall of the rotary case 302; the limiting ring 12 is movably arranged in the limiting ring groove 13, the limiting ring 12 is fixedly connected with the fixing shell 301 through a screw, the height of the limiting ring 12 is smaller than that of the limiting ring groove 13, and the limiting ring 12 can slide up and down in the limiting ring groove 13 and rotate around the circumference of the limiting ring.

Preferably, the stop collar 12, the rotary housing 302, the stationary housing 301 and the backing plate 6 are all made of steel.

In this embodiment of the present utility model, since the above-mentioned structure is adopted, the stop collar 13 is rotatably and liftably movably mounted in the stop collar 12, and when the universal wheel 2 is not subjected to a large impact, under the action of the buffer spring one 303, the top surface of the stop collar 13 is abutted against the top surface of the stop collar 12, the universal wheel 2 can rotate together with the rotary shell 302, the rotary shell 302 is cylindrical and can rotate in the fixed shell 301, and when the universal wheel 2 is subjected to a large impact, the rotary shell 302 is pushed to the top of the inner cavity of the fixed shell 301, and the stop collar 12 rises together with the rotary shell 302, so that the stop collar 13 slides towards the lower end of the stop collar 12;

the steel limiting ring 13, the rotating shell 302, the fixed shell 301 and the backing plate 6 have high structural strength, and are not easy to be deformed and damaged due to impact.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present utility model is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

The embodiments of the present utility model have been described above with reference to the accompanying drawings, but the present utility model is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are to be protected by the present utility model.

Claims (10)

1. Draw-bar box with universal wheel protective structure, characterized by comprising:

the top of the draw-bar box body (1) is provided with a draw bar;

four buffer devices (3) are respectively arranged at corners of the bottom end of the draw-bar box body (1);

the four universal wheels (2) are respectively rotatably arranged at the bottoms of the corresponding buffer devices (3);

the buffer device (3) comprises a fixed shell (301), a rotary shell (302), a buffer spring I (303) and a buffer shaft sleeve (4).

2. The trolley case with universal wheel guard structure of claim 1, further comprising:

the concave part (5) is arranged at the bottom of the draw-bar box body (1);

the base plate (6) is arranged on the inner wall of the bottom of the draw-bar box and covers the inner wall of the concave part (5);

the fixing shell (301) is arranged in the concave part (5), the base plate (6) and the fixing shell (301) are fixedly connected with each other through a plurality of fastening bolts, the rotary shell (302) is rotatably arranged in the fixing shell (301), and the buffer spring I (303) is arranged between the top end of the rotary shell (302) and the top end of an inner cavity of the fixing shell (301).

3. A trolley case with universal wheel guard according to claim 2, characterized in that the buffer device (3) further comprises:

a fixed strut (304) fixedly installed at one side of the inner wall of the rotary shell (302), the lower end of which extends out of the rotary shell (302);

one end of the connecting swing arm (305) is hinged with the fixed supporting rod (304) through a pin shaft, and the other end of the connecting swing arm is provided with a through hole (306);

one end of the elastic buffer rod (7) is hinged with the top of the inner cavity of the rotary shell (302), and the other end of the elastic buffer rod is hinged with the free end of the connecting swing arm (305);

the shaft rod of the universal wheel (2) is rotatably arranged in the through hole (306), and the buffer shaft sleeve (4) is arranged between the shaft rod of the universal wheel (2) and the through hole (306).

4. A trolley case with a caster protection structure according to claim 3, further comprising:

a wear-resistant bush (8) fixedly mounted on the inner ring of the buffer sleeve (4);

wherein the shaft rod of the universal wheel (2) is rotatably arranged in the wear-resistant bushing (8).

5. A trolley case with a caster protection structure according to claim 3, further comprising:

a drop-off prevention ring groove (9) provided on the inner ring of the through hole (306);

the outer ring of the buffer shaft sleeve (4) is embedded in the anti-falling ring groove (9).

6. A trolley case with a universal wheel guard according to any one of claims 3-5, characterized in that the buffer sleeve (4) comprises:

a sleeve body (401) made of rubber and having a sleeve shape;

and a plurality of buffer air bags (402) are uniformly arranged in the peripheral wall of the shaft sleeve body (401) at intervals along the circumferential direction.

7. A trolley case with a universal wheel guard according to claim 6, characterized in that the elastic buffer rod (7) comprises:

a lower rod (701), one end of which is hinged with the free end of the connecting swing arm (305), and the other end of which is provided with a sliding hole (702);

one end of the upper rod (703) is hinged with the top of the inner cavity of the rotary shell (302);

the sliding rod (704) is inserted in the sliding hole (702) in a sliding way away from the end of the upper rod (703);

a buffer spring II (705) which is arranged between the inner end of the sliding rod (704) and the inner end of the sliding hole (702);

and a buffer spring III (706) which is sleeved outside the sliding rod (704), and the two ends of the buffer spring III are respectively abutted with the opposite end surfaces of the upper rod (703) and the lower rod (701).

8. The trolley case with universal wheel guard of claim 7, further comprising:

the limiting groove (10) is arranged at the end, opposite to the elastic buffer rod (7), of the bottom end of the fixed supporting rod (304);

the limiting block (11) is fixedly arranged at the end, far away from the buffer shaft sleeve (4), of the connecting swing arm (305) and is in sliding fit with the limiting groove (10).

9. The trolley case with universal wheel guard of claim 6, further comprising:

a limit ring groove (13) arranged in the middle of the peripheral wall of the rotary shell (302);

a limit ring (12) which is movably arranged in the limit ring groove (13);

the limiting ring (12) is fixedly connected with the fixing shell (301) through a screw, the height of the limiting ring (12) is smaller than that of the limiting ring groove (13), and the limiting ring can slide up and down in the limiting ring groove (13) and rotate around the circumference of the limiting ring groove.

10. A trolley case with universal wheel guard structure as claimed in claim 9, wherein:

the limiting ring (12), the rotary shell (302), the fixed shell (301) and the backing plate (6) are all made of steel.