CN206342067U - Three horn rings and luggage case - Google Patents

Abstract

The utility model provides a triangular wheel and a luggage case, which relate to the technical field of daily necessities. The triangular wheel provided by the utility model includes: a chuck, which is provided with three chutes uniformly distributed around its center, and the chuck There is a through hole in the center, and a shaft is arranged in the through hole, and the chuck can rotate relative to the shaft; the load-bearing parts correspond to the chute one by one, and in each pair of chute and load-bearing parts corresponding to each other, one end of the load-bearing part is set There are rollers, the other end of the load-bearing part is connected with the chute, and the load-bearing part can move on the chute along the radial direction of the chuck; the limit assembly is arranged between the load-bearing part and the chuck to limit the sliding stroke of the load-bearing part; The drive assembly that drives the load bearing relative to the chuck. According to different terrains, the load-bearing part of the triangular wheel can be artificially expanded and contracted relative to the chuck, and will not be restricted by specific terrains.

Description

Triangular wheels and suitcases

technical field

The utility model relates to the technical field of daily necessities, in particular to a triangular wheel and a suitcase.

Background technique

The triangular wheel is a kind of load-bearing wheel commonly used in people's daily life, especially when transporting heavy items up and down the stairs, using the triangular wheel can prevent people from lifting the items up and down the stairs, saving time and effort. In the existing triangular wheels, the distance between the three rollers relative to their common axis of rotation is not adjustable, so the transportation process will be restricted by specific terrain, and the placement process will occupy a large area, which is very inconvenient.

Therefore, how to provide a triangular wheel with retractable rollers is one of the technical problems to be solved by those skilled in the art.

Utility model content

The purpose of this utility model is to provide a triangular wheel to solve the problems in the prior art that the distance between the three rollers relative to their common axis of rotation cannot be adjusted, the transportation process is limited by the specific terrain, and the placement process occupies an area To solve the technical problem with relatively large area, a suitcase using the above-mentioned triangular wheels is provided in addition.

The utility model provides a triangular wheel, comprising:

Chuck, the chuck is provided with three chutes evenly distributed around its center, the center of the chuck is provided with a through hole, the through hole is provided with a shaft body, the chuck can be opposite to the shaft rotation;

The load-bearing parts corresponding to the chute one by one, in each pair of chute and load-bearing parts corresponding to each other, one end of the load-bearing part is provided with a roller, the other end of the load-bearing part is connected to the chute, and The bearing member can move on the chute along the radial direction of the chuck;

a limiting component arranged between the load-bearing member and the chuck to limit the sliding stroke of the load-bearing member;

A drive assembly that drives the load-bearing member to move relative to the chuck.

Further, the load-bearing member further includes a claw with one end slidingly connected to the chute, and a wheel fork connected with the other end of the claw by bolts, and the roller is rotatably connected with the wheel fork.

Further, the chuck is provided with a protrusion extending along the circumferential direction of the chuck and into the chute, and along the radial direction of the shaft body, the claw is formed to slidably fit with the protrusion. The "work" type groove.

Further, the chute is provided with a blind hole opening towards the claw, and the drive assembly includes:

A cylinder that can be slidably installed in the blind hole along the depth direction of the blind hole, a limiting element that can control the expansion and contraction of the cylinder in the blind hole, and is arranged on the claw and can be connected with each other one by one A plurality of through grooves for matching the cylinder.

Further, the limiting assembly includes a block provided on the chute and a claw anti-off piece provided on the claw, the claw anti-off piece is detachably connected to the claw, the There is a protrusion on the claw anti-off piece. When the claw is in the first limit position, the claw anti-off piece is against the inner side of the chute to limit the movement stroke of the claw. When the claw is at the second extreme position, the protrusion of the claw anti-escape part abuts against the block to limit the movement stroke of the claw.

Further, the driving assembly includes a chuck driving part that can rotate around the shaft, and a plane screw thread on the side of the claw that is away from the claw-off prevention part. The chuck driving part is provided with a The plane thread on the jaw matches the plane thread. When the chuck driving part rotates, the plane thread on the chuck driving part drives the claw along the radial direction of the chuck at the Move on the chute.

Further, when the load-bearing member is in the working state and the claw drives the chuck to rotate relative to the shaft body, the chuck driving member rotates synchronously therewith.

Further, a tooth-shaped structure for increasing the frictional force between the user and the chuck driving member is provided along the peripheral surface of the chuck driving member.

Further, it also includes: a triangular wheel seat connected with the shaft body and a wheel seat fixing seat connected with the triangular wheel seat, and the wheel seat fixing seat is used for connecting with a heavy object.

The utility model also provides a suitcase, which includes the triangular wheel described in the above solution.

The triangular wheel and the suitcase provided by the utility model can produce the following beneficial effects:

In the triangular wheel provided by the utility model, the shaft body passes through the through hole in the center of the chuck, and the chuck can rotate relative to the shaft body. The chute on the chuck is used for sliding connection with one end of the bearing member. There are rollers. When the load-bearing part is required to move relative to the chute on the chuck, the drive assembly drives the load-bearing part to move along the chute until it is adjusted to the position required by the user. In order to prevent the load-bearing part from deviating from the set sliding stroke, the load-bearing A limit assembly for limiting the sliding stroke of the bearing part is provided between the part and the chuck.

When using the triangular wheels above, judge the distance that the load-bearing parts need to move on the chute according to the height of the steps, and use the drive assembly to move the three load-bearing parts to the predetermined position. During the adjusted working process, the three load-bearing parts The parts drive the chuck to rotate relative to the shaft body, and the rollers provided at the other end of the load-bearing parts contact the steps to realize the above-mentioned triangular wheels going up and down stairs. During the rotation, each load-bearing part just supports a step.

The above-mentioned triangular wheel can adjust the distance between the roller and the shaft body according to the height of the steps. Especially when the height of the steps is high, the traditional triangular wheel cannot be used. The above-mentioned triangular wheel can be applied to different situations by adjusting the drive assembly Terrain environment, and when the above-mentioned triangular wheels are not working, the load-bearing parts can be moved to the minimum stroke, which is more space-saving compared with the prior art, especially when the above-mentioned triangular wheels are used in the suitcase, travelers do not need to lift the suitcase Going up and down the stairs can greatly relieve the fatigue of travelers when going up and down the stairs.

Description of drawings

In order to more clearly illustrate the specific implementation of the utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the following descriptions The accompanying drawings are some implementations of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative work.

Fig. 1 is a schematic diagram of the planar structure of the cooperation between the load-bearing member and the chute provided by the utility model;

Fig. 2 is the schematic diagram of the three-dimensional structure of the triangular wheel provided by the utility model;

Fig. 3 is a three-dimensional structure schematic diagram of the claw provided by the utility model;

Fig. 4 is the schematic diagram of the three-dimensional structure of the chuck provided by the utility model;

Fig. 5 is the three-dimensional structure schematic diagram of the suitcase provided by the utility model;

Fig. 6 is a schematic diagram of the three-dimensional structure of the driving assembly provided by Embodiment 1 of the present utility model;

Fig. 7 is a schematic diagram of the three-dimensional structure of the driving assembly provided by the second embodiment of the utility model;

Fig. 8 is a schematic diagram of the cross-sectional structure of the shaft body provided by the present invention.

Icons: 1-chuck; 11-chute; 12-convex; 2-shaft; 21-first bearing; 22-second bearing; 3-load bearing; 31-roller; 32-claw; 33- Wheel fork; 4-limiting component; 41-block; 42-jaw anti-off piece; 421-protrusion; 5-driving component; 51-column; 52-limiting element; 521-button; Rod; 523-Tension wheel; 53-Through slot; 54-Chuck driver; 55-Plane thread; 56-Plane thread; 6-Triangle wheel seat; Chuck holder.

detailed description

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific The azimuth structure and operation, therefore can not be construed as the limitation of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The specific embodiment of the utility model will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the utility model, and are not intended to limit the utility model.

Fig. 1 is a schematic diagram of the planar structure of the load-bearing part and the chute provided by the utility model; Fig. 2 is a schematic diagram of the three-dimensional structure of the triangular wheel provided by the utility model; Fig. 3 is a schematic diagram of the three-dimensional structure of the claw provided by the utility model; Fig. 4 is the schematic diagram of this utility model The schematic diagram of the three-dimensional structure of the chuck provided by the utility model; Figure 5 is the schematic diagram of the three-dimensional structure of the suitcase provided by the utility model. Fig. 6 is a schematic diagram of the dimensional structure of the drive assembly provided by Embodiment 1 of the utility model; Fig. 7 is a schematic diagram of the dimensional structure of the drive assembly provided by Embodiment 2 of the utility model; Fig. 8 is a schematic diagram of the cross-sectional structure of the shaft body provided by the utility model.

As shown in Figure 1, the triangular wheel provided by the utility model includes: a chuck 1, which is provided with three chutes 11 evenly distributed around its center, and the center of the chuck 1 is provided with a through hole. There is a shaft body 2, and the chuck 1 can rotate relative to the shaft body 2; the load-bearing parts 3 corresponding to the chute 11 one by one, each pair of chute 11 corresponding to each other and the load-bearing part 3, one end of the load-bearing part 3 is provided with The roller 31, the other end of the load-bearing member 3 is connected with the chute 11, and the load-bearing member 3 can move on the chute 11 along the radial direction of the chuck 1; it is arranged between the load-bearing member 3 and the chuck 1 to limit the load-bearing member 3. The limit assembly 4 for the sliding stroke; the drive assembly 5 for driving the load-bearing member 3 to move relative to the chuck 1.

In the triangular wheel provided by the utility model, the shaft body 2 passes through the through hole in the center of the chuck 1, the chuck 1 can rotate relative to the shaft body 2, and the chute 11 on the chuck 1 is used for sliding connection with one end of the bearing member 3 The other end of the load-bearing member 3 is provided with a roller 31. When the load-bearing member 3 needs to move relative to the chute 11 on the chuck 1, the drive assembly 5 drives the load-bearing member 3 to move along the chute 11 until it is adjusted to the user’s desired position. In order to prevent the bearing member 3 from deviating from the set sliding stroke, a limit assembly 4 for limiting the sliding stroke of the bearing member 3 is provided between the bearing member 3 and the chuck 1 .

When using the above-mentioned triangular wheels to go up and down the stairs, judge the distance that the load-bearing parts 3 need to move on the chute 11 according to the height of the steps, and use the drive assembly 5 to move the three load-bearing parts 3 to predetermined positions. During the process, the three load-bearing parts 3 drive the chuck 1 to rotate relative to the shaft body 2, and the roller 31 provided at the other end of the load-bearing parts 3 is in contact with the steps to realize the above-mentioned triangular wheel going up and down stairs. During the rotation process, each load-bearing part 3 just Support a step.

The above-mentioned triangular wheel can adjust the distance between the roller 31 and the shaft body 2 according to the height of the step, especially when the height of the step is high, the traditional triangular wheel cannot be applied, and the above-mentioned triangular wheel can be applied through the adjustment of the driving assembly 5 It is suitable for different terrain environments, and when the above-mentioned triangular wheel is not working, the load-bearing member 3 can be moved to the minimum stroke, which is more space-saving compared with the prior art.

Further, as shown in FIGS. 2 and 3 , in order to facilitate the maintenance and replacement of the load-bearing member 3 , the load-bearing member 3 also includes a claw 32 that is slidably connected to the chute 11 at one end, and a wheel that is connected to the other end of the claw 32 by bolts. The fork 33 and the roller 31 are rotatably connected with the wheel fork 33. When the claw 32, the wheel fork 33 or the roller 31 break down after repeated use, the user can repair and replace the faulty part separately without replacing the load-bearing member 3 as a whole.

Further, as shown in FIG. 3 and FIG. 4 , in order to make the sliding connection between the claw 32 and the chute 11 more stable, the chuck 1 is provided with a The protruding part 12 forms an "I"-shaped groove slidingly fitted with the protruding part 12 on the claw 32 along the radial direction of the shaft body 2. The above-mentioned structure is simple and easy to install.

Further, as shown in FIG. 3 and FIG. 4 , in order to more firmly limit the movement stroke of the claw 32 , the limit assembly 4 includes a block 41 provided on the slide groove 11 and a claw anti-slip provided on the claw 32 . The part 42 is provided with a protrusion 421 on the anti-off part 42 of the claw. When the claw 32 is in the first limit position, the anti-off part 42 of the claw is against the inner side of the chute 11 to limit the movement stroke of the claw 32. At this time, the roller 31 is closest to the shaft body 2, and is suitable for steps with a relatively low height. When the claw 32 is in the second limit position, the protrusion 421 of the claw preventing member 42 is against the block 41 to limit the movement of the claw 32. The movement stroke, at this time, the roller 31 is the farthest away from the shaft body 2, which is suitable for steps with a high height. For the convenience of installation and disassembly, the claws 42 are detachably connected to the claws 32, specifically, the claws are detachable. 42 and the claw 32 are connected by bolts.

Further, as shown in Figure 2, in order to facilitate the installation of the above-mentioned triangular wheel and heavy objects, the above-mentioned triangular wheel also includes a triangular wheel seat 6 connected to the shaft body 2 and a wheel seat fixing seat 7 connected to the triangular wheel seat 6, the wheel seat The fixed seat 7 is used to connect with the heavy object. Specifically, the wheel seat fixed seat 7 is detachably connected with the heavy object. When the above-mentioned triangular wheel is not working, the above-mentioned triangular wheel can be disassembled from the heavy object in order to save the heavy object. down.

Specifically, as shown in FIG. 1 , the shaft body 2 is provided with a chuck fixing member 9 for axially positioning the chuck 1, and the chuck fixing member 9 and the chuck 1 are connected by bolts, and the chuck fixing member A bearing is installed between 9 and the shaft body 2 so that the chuck fixing member 9 can rotate around the shaft body 2 synchronously with the chuck 1, so that the rotation between the chuck 1 and the shaft body 2 is more stable. More specifically, As shown in FIG. 2 , a bearing is provided between the chuck fixing part 9 and the triangular wheel base 6 so that the chuck fixing part 9 can rotate relative to the triangular wheel base 6 .

Specifically, in order to make the connection between the triangular wheel seat 6 and the shaft body 2 more firm, the triangular wheel seat 6 and the shaft body 2 are connected by bolts.

A suitcase 8 comprising the above-mentioned triangular wheels, as shown in Figure 5, people do not need to lift the suitcase 8 when using the above-mentioned suitcase 8 to go up and down the stairs, and can directly pull the suitcase 8 up and down the stairs through the above-mentioned triangular wheels, Simultaneously due to the changeable travel environment, the distance between the roller 31 and the shaft body 2 can be adjusted by the driving assembly 5 in the above-mentioned triangular wheel to adapt to steps of different heights. Time-saving and labor-saving, especially when the suitcase 8 is placed on a special slope to go up and down stairs, since the slope is located on one side of the human body, in order to prevent the suitcase 8 from falling off the slope, the traveler needs to keep the arm pulling the suitcase 8 away from the body , especially when the weight of the suitcase 8 is very large, it is more difficult to go upstairs, and the use of the suitcase 8 comprising the above-mentioned triangular wheels can greatly relieve the traveler's fatigue.

According to the structure type of the driving assembly 5, it can be divided into the following two embodiments.

Embodiment one:

As shown in Figure 6, the chute 11 is provided with a blind hole with an opening facing the claw 32. The drive assembly 5 in Embodiment 1 of the present utility model includes: a cylinder that can be slidably installed in the blind hole along the depth direction of the blind hole 51. The limiting element 52 that can control the expansion and contraction of the cylinder 51 in the blind hole, and several through slots 53 that are provided on the claw 32 and can cooperate with the cylinder 51 one by one. Specifically, the above-mentioned drive assembly 5 can be arranged on the load-bearing member 3 is connected with the chute 11.

Further, the limiting element 52 includes: a groove is opened on the chuck 1, and a button 521 that can be pressed up and down and fixed on the chuck 1 is installed in the groove, along the direction that the button 521 moves up and down, A number of springs are arranged between the button 521 and the chuck 1, and a first through hole is provided in the middle of the groove. One end of the button 521 is connected with a thin rod 522 along the length direction of the first through hole, and the thin rod 522 faces away from the button 521. One end of the blind hole is connected with a stay cord, and the bottom of the blind hole is provided with a second blind hole for the stay cord to pass through. The tensioning pulley 523 and the stay cord are connected to the bottom surface of the column body 51 through the second blind hole, and a force storage spring is arranged between the bottom surface of the column body 51 and the chuck 1 .

When the above-mentioned drive assembly 5 is used, when the load-bearing member 3 is at the maximum moving stroke, the cylinder 51 is just in contact with the through groove 53 farthest from the roller 31; When it is necessary to move the roller 31 away from the shaft body 2, press the button 521, and the pull cord pulls the cylinder 51 to move in the direction away from the load-bearing member 3. When the cylinder 51 all enters the blind hole, the load-bearing The member 3 can move along the sliding groove 11, and the user can select a suitable channel 53 to abut against the column body 51. After the channel 53 contacts the column body 51, the bearing member 3 is locked and the adjustment is completed.

Embodiment two:

As shown in Fig. 3 and Fig. 7, the driving assembly 5 in the second embodiment of the present utility model includes: a chuck driving member 54 that can rotate around the shaft body 2, and is arranged on the side of the jaw 32 that is away from the jaw detachment prevention member 42. The plane thread 55 of the chuck driver 54 is provided with the plane thread 56 matched with the plane thread 55 on the jaw 32. When the chuck driver 54 rotates, the plane thread 56 drives the jaw 32 along the chuck 1 Moving on the chute 11 in the radial direction, the above-mentioned driving assembly 5 is simple, convenient and quick to operate, and can realize three load-bearing parts 3 moving on the chute 11 along the radial direction of the chuck 1 at one time.

Further, when the bearing member 3 is in the working state, since the roller 31 at one end of the bearing member 3 touches the ground and is pressed by the heavy object, the claw 32 at the other end of the bearing member 3 will transfer to the chuck 1 and the drive assembly 5 A radial force and a circumferential force, because the radial direction of the claw 32 in the chute 11 is limited by the plane thread 56 on the chuck driver 54, so the radial force of the claw 32 acts on the plane thread 56, and The direction is perpendicular to the tangential direction of the plane thread 56, so that the plane thread 55 on the claw 32 and the plane thread 56 on the chuck driver 54 are tightly opposed, thereby producing a clamping effect. The circumferential movement of the claw 32, so the circumferential force of the claw 32 acts on the chute 11, and the direction is perpendicular to the extending direction of the chute 11, limiting the movement of the claw 32, and the radial force on the plane thread 56 is the same as that of the sliding groove 11. The circumferential force received by the groove 11 finally acts on the bearing. Therefore, when the jaws 32 drive the chuck 1 to rotate relative to the shaft body 2, the chuck driving member 54 rotates synchronously with it, and the jaws 32 will not move along the radial direction of the chuck 1. Moving on the chute 11, when the chuck driver 54 rotates, the fixed chuck 1 does not move, and the plane thread 56 can drive the claw 32 to move on the chute 11 along the radial direction of the chuck 1.

Specifically, as shown in Figure 8, the shaft body 2 is provided with a chuck fixing part 9 to prevent dry friction between the chuck 1 and the triangular wheel seat 6, and the chuck fixing part 9 and the chuck 1 are connected by bolts, and the chuck The disk fixing part 9 is provided with a shaft sleeve, and the shaft sleeve is arranged between the shaft body 2 and the chuck 1. The shaft body 2 includes a first shaft body, a second shaft body and a third shaft body whose diameters are successively reduced. The shaft cooperates with the chuck driver 54 to define the axial position of the chuck driver 54, the first bearing 21 is arranged on the third shaft, and the first bearing 21 is positioned by the end face of the second shaft, and the shaft The sleeve is offset against the outer ring of the first bearing, the second bearing 22 is arranged between the shaft body 2 and the triangular wheel seat 6, and the second bearing 22 is in clearance fit with the third shaft body, and the fixing part is offset against the inner ring of the second bearing 22 so that To avoid friction between the fixing part and the shaft body 2 , a platform body is provided on the triangular wheel base 6 , and the platform body is matched with the outer ring of the second bearing 22 .

Further, as shown in FIG. 7, a tooth-shaped structure for increasing the frictional force between the user and the chuck driving member 54 is provided along the peripheral surface of the chuck driving member 54, so that the user can turn the chuck more easily. Disk drive 54 .

Further, as another specific possible implementation, along the peripheral surface of the chuck driving member 54, there are lines for increasing the frictional force between the user and the chuck driving member 54, so that the above-mentioned chuck drives Part 54 is easier to machine.

The triangular wheel and the suitcase of the present invention have been described above. However, the present invention is not limited to the above-mentioned specific embodiments, and various deformations and changes are possible as long as they do not depart from the scope of the claims. The present invention includes various modifications and changes within the scope of the claims.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the embodiments of the present utility model Scope of technical solutions.

Claims (10)

1. A triangular wheel, characterized in that, comprising: Chuck (1), the chuck (1) is provided with three chutes (11) evenly distributed around its center, the center of the chuck (1) is provided with a through hole, and the through hole is provided with There is a shaft (2), and the chuck (1) can rotate relative to the shaft (2); One-to-one correspondence with the load-bearing member (3) of the chute (11), each pair of mutually corresponding chute (11) and the load-bearing member (3), one end of the load-bearing member (3) is provided with a roller ( 31), the other end of the load-bearing member (3) is connected to the chute (11), and the load-bearing member (3) can move along the radial direction of the chuck (1) in the chute ( 11) move up; A limit assembly (4) arranged between the bearing member (3) and the chuck (1) to limit the sliding stroke of the bearing member (3); A drive assembly (5) that drives the bearing member (3) to move relative to the chuck (1). 2. The triangular wheel according to claim 1, characterized in that, the load-bearing member (3) further comprises a claw (32) with one end slidingly connected to the chute (11), and a claw (32) connected with the claw (32). ) the other end of the wheel fork (33) connected by bolts, and the roller (31) is rotationally connected with the wheel fork (33). 3. The triangular wheel according to claim 2, characterized in that, the chuck (1) is provided with a protrusion along the circumference of the chuck (1) and extending into the chute (11). part (12), along the radial direction of the shaft body (2), an "I"-shaped groove is formed on the claw (32) to slide and fit the convex part (12). 4. The triangular wheel according to claim 2, characterized in that, the chute (11) is provided with a blind hole opening towards the claw (32), and the drive assembly (5) comprises: A cylinder (51) that can be slidably installed in the blind hole along the depth direction of the blind hole, a limiting element (52) that can control the expansion and contraction of the cylinder (51) in the blind hole, and a There are several through slots (53) on the claw (32) that can fit with the cylinder (51) one by one. 5. The triangular wheel according to claim 2, characterized in that, the limiting assembly (4) includes a block (41) provided on the chute (11) and a block (41) provided on the claw (32) The claw anti-off piece (42), the claw anti-off piece (42) is detachably connected with the claw (32), and the claw anti-off piece (42) is provided with a protrusion (421) , when the claw (32) is in the first extreme position, the claw (42) resists against the inner side of the chute (11) to limit the movement stroke of the claw (32), When the claw (32) is in the second extreme position, the protrusion (421) of the claw (42) is against the block (41) to limit the movement of the claw (32). Mobile itinerary. 6. The triangular wheel according to claim 2, characterized in that, the drive assembly (5) includes a chuck drive member (54) that can rotate around the shaft (2), and is arranged on the claw (32) The plane thread (55) on the side away from the claw (42) on the upper side, the chuck drive (54) is provided with the plane thread (55) on the jaw (32) to match When the chuck driver (54) rotates, the flat thread (56) on the chuck driver (54) drives the jaws (32) along the chuck (1) Movement in radial direction on said chute (11). 7. The triangular wheel according to claim 6, characterized in that, when the load-bearing member (3) is in working condition, and the claw (32) drives the chuck (1) relative to the shaft body ( 2) When rotating, the chuck driving member (54) rotates synchronously with it. 8. The triangular wheel according to claim 6, characterized in that, along the peripheral surface of the chuck driving member (54), there is a device for increasing the distance between the user and the chuck driving member (54). The tooth structure of the friction force. 9. The triangular wheel according to claim 1, further comprising: a triangular wheel seat (6) connected to the shaft body (2) and a wheel seat fixed to the triangular wheel seat (6) Seat (7), described wheel seat fixing seat (7) is used for being connected with weight. 10. A suitcase, characterized in that the triangular wheel according to any one of claims 1-9 is installed on the suitcase (8).