CN113942343B

CN113942343B - Luggage castor

Info

Publication number: CN113942343B
Application number: CN202111406988.8A
Authority: CN
Inventors: 黄英
Original assignee: Zhejiang Baixiang Tourism Products Co ltd
Current assignee: Zhejiang Baixiang Tourism Products Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2023-09-19
Anticipated expiration: 2041-11-24
Also published as: CN113942343A

Abstract

The application relates to a luggage caster, which comprises a bracket and a roller, wherein the bracket is arranged at the bottom of a luggage, the roller is rotatably arranged on the bracket, the bracket is rotatably connected with a protective cover through a hinge piece, the protective cover is positioned at the outer side of the roller and can rotate to a first position with the bottom higher than the roller and a second position with the bottom lower than the roller, and at least one group of locking pieces for locking the protective cover at the first position or the second position are arranged on the bracket. The application has the effect of long service life of the roller.

Description

Luggage castor

Technical Field

The application relates to the technical field of bags, in particular to a bag caster.

Background

The luggage generally refers to a package capable of containing objects, and various kinds of luggage have been developed along with the continuous improvement of the living and consumption level of people. The luggage caster is used as one of accessories of the luggage, is usually connected to the bottom of the luggage and is used for reducing friction resistance of the luggage when the luggage is towed on the ground, and plays a role in saving power.

Currently, the luggage casters disclosed in the market generally comprise a bracket and a roller, wherein the bracket is arranged at the bottom of the luggage, and the roller is rotatably connected to the bracket. When the hauling luggage goes up and down stairs, the bottoms of the rollers are easy to collide with the stairs to generate loss, and particularly, the rollers made of plastic materials are easy to crack after striking the stairs for many times, so that the service life is shortened, and the improvement is needed.

Disclosure of Invention

In order to prolong the service life of the roller, the application provides a luggage caster.

The application provides a luggage caster which adopts the following technical scheme:

the utility model provides a case and bag truckle, includes the support of installing in case and bag bottom and rotates the gyro wheel that sets up on the support, rotate through the articulated elements on the support and be connected with the protection casing, the protection casing is located the outside of gyro wheel and can rotate to the bottom and be higher than the first position of gyro wheel and the bottom is lower than the second position of gyro wheel, be provided with at least a set of locking piece that is used for locking the protection casing in first position or second position on the support.

By adopting the technical scheme, when the luggage is dragged on the flat ground, the protective cover is rotated to the first position of which the bottom is higher than the roller, so that the protective cover is prevented from affecting the contact between the roller and the ground; when the luggage is moved up and down stairs, the protective cover is rotated to a second position with the bottom lower than the roller, and at the moment, the protective cover is positioned at the outer side of the roller and the bottom lower than the roller, so that the roller is protected, the bottom of the roller cannot directly strike the stairs to crack and damage, and the service life of the roller is prolonged. The locking piece can lock the protection cover at the first position or the second position, so that the stability of the protection cover is improved.

Optionally, the hinge piece comprises a hinge shaft penetrating through the bracket in a rotating way and a connecting rod fixed on the circumferential side wall of the hinge shaft, and one end of the connecting rod, far away from the hinge shaft, is fixed on the protective cover; the locking piece comprises a sliding block arranged on the bracket in a sliding way and a locking rod fixed on one side of the sliding block close to the hinge shaft, a first locking groove and a second locking groove which are in plug-in fit with the locking rod are formed in the circumferential side wall of the hinge shaft, and when the locking rod is inserted into the first locking groove, the protective cover is positioned at a first position; the shield is in the second position when the locking bar is inserted into the second locking slot.

Through adopting above-mentioned technical scheme, when the protection casing rotates, connecting rod and articulated shaft can rotate along with it in step for first locking groove and second locking groove and locking lever's relative position change. When the locking bar is aligned with the first locking groove, the shield is in the first position; when the locking bar is aligned with the second locking groove, the shield is in the second position. When the protective cover is locked, an operator only needs to stir the sliding block to enable the end part of the locking rod to be embedded into the first locking groove or the second locking groove, so that the hinge shaft can be limited to rotate relative to the support, and the protective cover is simple in structure and convenient to operate.

Optionally, a plurality of positioning teeth are continuously distributed on the side wall of the connecting rod, each positioning tooth is circumferentially distributed along the central axis of the hinge shaft, a positioning groove is formed between two adjacent positioning teeth, and a stop block matched with the positioning groove is arranged on one side of the sliding block close to the connecting rod.

By adopting the technical scheme, when the end part of the locking rod stretches into the first locking groove or the second locking groove, the stop block can stretch into the positioning groove close to the first locking groove or the second locking groove, so that the locking effect of the locking piece on the protective cover is enhanced.

Optionally, the support is provided with the pothook that can produce elastic deformation, integrated into one piece has the extension piece with pothook joint complex on the shield, when the shield is in the first position, extension piece and pothook joint.

Through adopting above-mentioned technical scheme, the in-process that the protection casing was changeed to the first position, the extension piece can gradually extrude the pothook for the pothook produces slight deformation and produces elasticity, until extension piece joint on the pothook, thereby preliminary location protection casing, the convenience of operation personnel operation locking piece. When the protective cover is rotated again, the clamping hook is only required to be stirred to one side far away from the extension block, so that the clamping hook is deformed to be separated from the extension block, and the operation is simple and convenient.

Optionally, the side that the protection casing is close to the gyro wheel has seted up the active slot that upper and lower both sides link up, joint is fixed with the activity cover that at least one tip exposes in the active slot, be fixed with elastic first fixture block and second fixture block on the lateral wall of activity cover, first fixture block and second fixture block distribute along the length direction of activity cover, offer on the cell wall of active slot with first fixture block or second fixture block joint complex draw-in groove.

Through adopting above-mentioned technical scheme, when the protection casing rotated to the second position, with the activity cover joint in the state of stretching out the protection casing, the activity cover plays the effect of further protecting the gyro wheel this moment, has strengthened the protection effect of protection casing to the gyro wheel. When the clamping groove is clamped with the first clamping block or the second clamping block, the length of the movable cover extending out of the movable cover is different, and an operator can select the clamping position of the movable cover according to requirements, so that the movable cover is suitable for different use environments.

Optionally, the bracket comprises a base, a connecting plate rotatably arranged below the base and two mounting rods fixedly arranged below the connecting plate, and the roller and the protective cover are both hinged on the mounting rods; the base and the connecting plate are rotatably provided with at least one group of connecting pieces, the end faces of the base and the connecting plate, which are close to each other, are respectively provided with an annular groove, the connecting pieces comprise a first connecting ball and a second connecting ball which are fixedly connected, the first connecting ball is rotatably arranged in the annular groove on the base, and the second connecting ball is rotatably arranged in the annular groove on the connecting plate.

Through adopting above-mentioned technical scheme, connecting plate and base can rotate relatively for the gyro wheel can roll to different directions, and the movable range of gyro wheel is big, makes things convenient for operating personnel to pass the case and bag to different directions. The base and the connecting plate are connected through the first connecting ball and the second connecting ball, and the first connecting ball and the second connecting ball can rotate relative to the base and the connecting plate, so that the friction between the base and the connecting plate is converted into rolling friction when the base and the connecting plate rotate relative to each other, and the effect of further saving power is achieved.

Optionally, the end surfaces of the first connecting ball and the second connecting ball are flat sections.

By adopting the technical scheme, the contact area of the first connecting ball and the second connecting ball is large, and the connecting strength and the stability of the first connecting ball and the second connecting ball are high.

Optionally, be provided with at least a set of locating part that is used for hindering the relative base pivoted of connecting plate on the connecting plate, the locating part is including wearing to establish the gag lever post in the connecting plate, connect the dog and setting up the elastic component between dog and connecting plate in gag lever post one side of keeping away from the base, the elastic component is used for driving gag lever post and base separation, the spacing groove that supplies gag lever post tip male has been seted up to the downside of base.

Through adopting above-mentioned technical scheme, when operating personnel needs case and bag to appointed single direction when marcing, can upwards remove the gag lever post for in the tip of gag lever post inserts the spacing groove, thereby hinder the relative base rotation of connecting plate. Therefore, the luggage castor can be changed into a fixed castor which can only travel in a single direction, so that the travel distance is prolonged due to the fact that the roller rotates relative to the base during travel.

Optionally, the limit groove is provided with a plurality of limit grooves and is circumferentially distributed along the central axis of the annular groove.

Through adopting above-mentioned technical scheme, the spacing groove is provided with a plurality of, and operating personnel can stretch into different spacing grooves with the tip of gag lever post during the use to change the orientation of gyro wheel, with the adaptation with case and bag to the single direction of difference lapse.

Optionally, a magnet is fixed on the wall of the limit groove, and the limit rod is made of a metal material which is attracted with the magnet.

Through adopting above-mentioned technical scheme, can with magnet inter attraction after the tip of gag lever post stretches into the spacing groove, improved the stability of gag lever post grafting when the spacing groove, strengthened the spacing effect of locating part to the connecting plate.

In summary, the present application includes at least one of the following beneficial technical effects:

the protective cover positioned at the outer side of the roller is rotatably arranged on the bracket, when the luggage is moved up and down stairs, the protective cover can be rotated to a second position with the bottom lower than the roller, and the protective cover plays a role in protecting the roller, so that the roller is not easy to strike the stairs to wear, and the service life of the roller is prolonged;

when the protective cover is locked, an operator only needs to stir the sliding block to one side close to the hinge shaft, so that the end part of the locking rod is inserted into the first locking groove or the second locking groove, and the stop block extends into the positioning groove close to the first locking groove or the second locking groove, and the operation is simple and convenient;

the base and the connecting plate are rotationally connected through the connecting piece, so that the rollers can move in different directions, the moving range of the rollers is large, and the labor-saving effect is good; if the roller only needs to travel in a single direction, the end part of the limiting rod can extend into the limiting groove close to the end part of the limiting rod, so that the relative rotation of the base and the connecting plate can be prevented.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present application.

Fig. 2 is an exploded view of an embodiment of the present application.

Fig. 3 is a schematic cross-sectional view of an embodiment of the present application taken along the direction A-A in fig. 1.

Fig. 4 is a schematic view of a partial explosion of an embodiment of the present application.

Reference numerals illustrate:

1. a bracket; 11. a base; 111. a limit groove; 112. a magnet; 12. a connecting plate; 121. a clamping hook; 13. a mounting rod; 131. a chute; 14. an annular groove; 2. a roller; 3. a connecting piece; 31. a first connection ball; 32. a second connection ball; 33. cutting the dough flat; 4. a limiting piece; 41. a limit rod; 42. a stop block; 43. an elastic member; 5. a hinge; 51. a hinge shaft; 511. a first locking groove; 512. a second locking groove; 52. a connecting rod; 521. positioning teeth; 522. a positioning groove; 6. a protective cover; 61. an extension block; 62. a movable groove; 621. a clamping groove; 63. a movable cover; 631. a first clamping block; 632. a second clamping block; 7. a locking member; 71. a slide block; 711. a stopper; 72. a locking lever.

Detailed Description

The application is described in further detail below with reference to fig. 1-4.

The embodiment of the application discloses a luggage castor. Referring to fig. 1, the luggage caster comprises a bracket 1 and a roller 2 rotatably arranged on the bracket 1, wherein the bracket 1 comprises a base 11, a connecting plate 12 rotatably arranged below the base 11 and two mounting rods 13 fixedly arranged below the connecting plate 12, the base 11 is fixedly arranged at the bottom of the luggage, and the above fixing modes can be bolt connection or other modes. The roller 2 is rotatably connected between the two mounting rods 13 through a rotating shaft, so that the labor consumption of an operator for pushing the luggage to travel is reduced.

Referring to fig. 2 and 3, an annular groove 14 is respectively provided on the end surfaces of the base 11 and the connecting plate 12, which are close to each other, at least one group of connecting pieces 3 are rotatably provided between the base 11 and the connecting plate 12, and the connecting pieces 3 in this embodiment are provided with two groups and are uniformly distributed circumferentially along the central axis of the annular groove 14. Each set of connection elements 3 comprises a first connection ball 31 and a second connection ball 32 which are fixedly connected, wherein the first connection balls 31 are rotatably arranged in the annular groove 14 of the base 11 and the second connection balls 32 are rotatably arranged in the annular groove 14 on the connection plate 12. By the arrangement, the base 11 and the connecting plate 12 can relatively rotate to change the direction of the roller 2 and the travelling direction, so that the luggage can travel in various directions.

Referring to fig. 2 and 3, in order to prevent the first connecting ball 31 from being separated from the base 11 and the second connecting ball 32 from being separated from the connecting plate 12, the longitudinal section of the annular groove 14 in this embodiment is preferably arc-shaped, the center of gravity of the first connecting ball 31 is located in the annular groove 14 on the base 11, and the center of gravity of the second connecting ball 32 is located in the annular groove 14 on the connecting plate 12. In actual assembly, an operator may form a notch in the base 11 and the connecting plate 12 in advance, the first connecting ball 31 and the second connecting ball 32 extend into the annular groove 14 along the notch, and finally fill the notch by using a solid body, so as to prevent the first connecting ball 31 and the second connecting ball 32 from moving out of the annular groove 14 from the notch. The above-mentioned assembly mode is only one mode which is feasible in practical operation, and is not the only mode for realizing the above-mentioned scheme of the application.

Referring to fig. 2 and 3, the first connection ball 31 and the second connection ball 32 in the present embodiment are connected by welding, and may be connected by glue bonding or the like in other embodiments. In order to increase the contact area between the first connection ball 31 and the second connection ball 32, a flat cut surface 33 is provided on the end surfaces of the first connection ball 31 and the second connection ball 32 that are close to each other, and the flat cut surface 33 is formed by cutting the first connection ball 31 and the second connection ball 32 by a cutter.

Referring to fig. 1 and 3, the connecting plate 12 is provided with at least one set of limiting members 4 for preventing the connecting plate 12 from rotating relative to the base 11, and the limiting members 4 in this embodiment are provided with one set and are located outside the annular groove 14. The limiting member 4 includes a limiting rod 41 penetrating through the connecting plate 12, a stop block 42 fixed on one side of the limiting rod 41 far away from the base 11, and two sets of elastic members 43 arranged between the stop block 42 and the connecting plate 12, wherein the elastic members 43 in this embodiment are springs with one ends fixed on the stop block 42 and the other ends fixed on the connecting plate 12, and when the springs are in a natural state, gaps exist between the top of the limiting rod 41 and the base 11, and in other embodiments, the elastic members 43 may be elastic sheets or the like.

Referring to fig. 3, a plurality of limit grooves 111 are circumferentially distributed on the lower side surface of the base 11 along the central axis of the annular groove 14, the inner diameter of the limit groove 111 is equal to the diameter of the limit rod 41, and the end part of the limit rod 41 can be inserted, in this embodiment, six limit grooves 111 are provided, and in other embodiments, other numbers can be provided. When the luggage is required to travel in a specified single direction, an operator can press the stop block 42 upwards, so that the spring is pressed and deformed, and the top end of the limit rod 41 is embedded into the limit groove 111 close to the spring, thereby limiting the rotation of the connecting plate 12 relative to the base 11.

Referring to fig. 3, in order to improve the stability of the stop lever 41 when inserted into the stop slot 111, the base 11 is made of plastic, and can slightly deform when being extruded and recover after the external force is removed, so that the stop lever 41 can be tightly inserted into the stop slot 111, thereby improving the stop effect of the stop lever 41 on the connecting plate 12. In order to make the limit rod 41 not easy to move out of the limit groove 111 under the action of the elasticity of the spring, a magnet 112 is fixed on the wall of the limit groove 111 far away from the opening of the limit groove, and the limit rod 41 is made of a metal material which is attracted with the magnet 112, such as iron. The top of the limit rod 41 is embedded into the limit groove 111 and then can be attracted with the magnet 112, so that the stability of the limit rod 41 is further improved.

Referring to fig. 2 and 4, the protection cover 6 is rotatably connected to the bracket 1 through the hinge 5, and the protection cover 6 is positioned at the outer side of the roller 2 and is made of stainless steel material, so that the protection cover has the advantage of good impact resistance. The hinge 5 includes two hinge shafts 51 and connecting rods 52 respectively fixed on circumferential side walls of the hinge shafts 51, wherein one hinge shaft 51 is rotatably inserted into one mounting rod 13, the other hinge shaft 51 is rotatably inserted into the other mounting rod 13, and one end of each connecting rod 52, which is far away from the hinge shaft 51, is fixedly connected to the protective cover 6, so that the protective cover 6 can rotate relative to the support 1.

Referring to fig. 4, the shield 6 can be rotated to a first position with the bottom higher than the roller 2 and a second position with the bottom lower than the roller 2, two sets of locking members 7 for locking the shield 6 in the first position or the second position are provided on the bracket 1, and the two sets of locking members 7 are respectively connected to different mounting bars 13. The locking piece 7 comprises a sliding block 71 arranged on the bracket 1 in a sliding manner and a locking rod 72 fixed on one side of the sliding block 71 close to the hinge shaft 51, a sliding groove 131 with a dovetail-shaped cross section is formed in the side surface of the installation rod 13 away from the roller 2, and one end of the sliding block 71 is also dovetail-shaped and is arranged in the sliding groove 131 in a sliding manner, so that the sliding block 71 is not easy to separate from the installation rod 13.

Referring to fig. 4, a first locking groove 511 and a second locking groove 512 are formed in a circumferential side wall of the hinge shaft 51, the first locking groove 511 and the second locking groove 512 are distributed along a circumferential direction of the hinge shaft 51, and the first locking groove 511 and the second locking groove 512 are in insertion fit with an end portion of the locking lever 72. When the end of the locking lever 72 is inserted into the first locking groove 511, the protective cover 6 is in the first position, so that the use of the roller 2 is not affected; when the end of the locking lever 72 is inserted into the second locking groove 512, the protective cover 6 is in the second position and plays a role in protecting the roller 2, so that the roller 2 is not easy to be damaged when the luggage is moved up and down stairs.

Referring to fig. 2 and 4, the end surface of the link 52 away from the shield 6 is a convex arc surface, and the central axis of the convex arc surface is collinear with the central axis of the hinge shaft 51. A plurality of positioning teeth 521 are continuously distributed on the circumferential side wall of the convex cambered surface, the positioning teeth 521 are integrally formed on the side wall of the connecting rod 52, a positioning groove 522 is formed between two adjacent positioning teeth 521, and a stop block 711 matched with the positioning groove 522 is fixed on one side of the sliding block 71 close to the connecting rod 52. When the locking rod 72 extends into the first locking groove 511 or the second locking groove 512, the stop block 711 can extend into the positioning groove 522 close to the first locking groove to improve the positioning effect of the locking piece 7 on the protective cover 6.

Referring to fig. 3, a hook 121 capable of elastic deformation is fixed to the lower side of the connection plate 12, and an extension block 61 is integrally formed at the top of the shield 6 toward the side close to the roller 2. When the protective cover 6 is rotated to the first position, the extension block 61 gradually presses the hook 121 until being clamped above the hook 121. So set up, not only can improve the stability when protection casing 6 is in the first position, can also preliminary location protection casing 6 to operate locking piece 7.

Referring to fig. 4, a movable groove 62 penetrating from the upper side to the lower side is formed in the side surface of the protective cover 6, which is close to the roller 2, two movable covers 63 are slidably arranged in the movable groove 62, and the movable covers 63 are connected to the protective cover 6 in a clamping manner. The opposite side walls of each movable cover 63 are respectively fixed with a first clamping block 631 and a second clamping block 632 which are made of elastic materials, the first clamping blocks 631 and the second clamping blocks 632 are distributed along the length direction of the movable cover 63, and the first clamping blocks 631 are positioned on one side, far away from the connecting rod 52, of the second clamping blocks 632.

Referring to fig. 4, two clamping grooves 621 are respectively formed on opposite groove walls of the movable groove 62, the two clamping grooves 621 are respectively close to the upper end and the lower end of the movable groove 62, and the clamping grooves 621 are in clamping fit with the first clamping block 631 and the second clamping block 632. When the first clamping block 631 is embedded into the clamping groove 621 similar to the first clamping block, the length of the movable cover 63 extending out of the protective cover 6 is relatively small, so that space is saved; when the second clamping block 632 is embedded in the clamping groove 621 similar to the second clamping block, the length of the movable cover 63 extending out of the protective cover 6 is relatively large, and the movable cover can play a role in assisting in protecting the roller 2.

The embodiment of the application provides a luggage caster, which is implemented by the following principle: when the case and bag is pushed on level ground, rotate the protection casing 6 to the first position for extend piece 61 and the mutual joint of pothook 121, insert the tip of locking lever 72 in first locking groove 511 again, with the relative gyro wheel 2 rotation of hindrance protection casing 6, the bottom of protection casing 6 is higher than gyro wheel 2 this moment, can not influence gyro wheel 2's use. When the tote goes up and down stairs, the protective cover 6 is rotated to the second position, the end of the locking rod 72 is inserted into the second locking groove 512, then the movable cover 63 is moved out of the protective cover 6, and the clamping groove 621 is clamped with the second clamping block 632. At this time, the bottoms of the protective cover 6 and the movable cover 63 are lower than the roller 2, so that the roller 2 is protected, the roller 2 is not easy to directly strike stairs to be damaged, and the service life of the roller 2 is prolonged.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. The utility model provides a case and bag truckle, includes support (1) and rotation setting gyro wheel (2) on support (1) of installing in case and bag bottom, its characterized in that: the support (1) is rotationally connected with the protective cover (6) through the hinge piece (5), the protective cover (6) is positioned on the outer side of the roller (2) and can rotate to a first position with the bottom higher than the roller (2) and a second position with the bottom lower than the roller (2), and the support (1) is provided with at least one group of locking pieces (7) for locking the protective cover (6) at the first position or the second position; the hinge piece (5) comprises a hinge shaft (51) which is rotatably arranged on the bracket (1) in a penetrating manner and a connecting rod (52) which is fixed on the circumferential side wall of the hinge shaft (51), and one end, far away from the hinge shaft (51), of the connecting rod (52) is fixed on the protective cover (6); the locking piece (7) comprises a sliding block (71) arranged on the bracket (1) in a sliding manner and a locking rod (72) fixed on one side, close to the hinge shaft (51), of the sliding block (71), a first locking groove (511) and a second locking groove (512) which are in plug-in fit with the locking rod (72) are formed in the circumferential side wall of the hinge shaft (51), and when the locking rod (72) is inserted into the first locking groove (511), the protective cover (6) is positioned at a first position; when the locking lever (72) is inserted into the second locking groove (512), the protective cover (6) is in the second position.

2. A luggage caster as defined in claim 1, wherein: a plurality of positioning teeth (521) are continuously distributed on the side wall of the connecting rod (52), each positioning tooth (521) is circumferentially distributed along the central axis of the hinge shaft (51), a positioning groove (522) is formed between two adjacent positioning teeth (521), and a stop block (711) matched with the positioning groove (522) is arranged on one side, close to the connecting rod (52), of the sliding block (71).

3. A luggage caster as defined in claim 1, wherein: the support (1) is provided with a clamping hook (121) capable of generating elastic deformation, the protective cover (6) is integrally formed with an extending block (61) which is matched with the clamping hook (121) in a clamping mode, and when the protective cover (6) is located at a first position, the extending block (61) is clamped with the clamping hook (121).

4. A luggage caster as defined in claim 1, wherein: the utility model discloses a movable cover, including gyro wheel (2) and protection casing (6), movable groove (62) that link up from top to bottom both sides are seted up to the side that protection casing (6) is close to gyro wheel (2), joint is fixed with at least one tip in movable groove (62) and exposes movable cover (63), be fixed with elastic first fixture block (631) and second fixture block (632) on the lateral wall of movable cover (63), the length direction distribution of movable cover (63) is followed to first fixture block (631) and second fixture block (632), set up on the cell wall of movable groove (62) with first fixture block (631) or second fixture block (632) joint complex draw-in groove (621).

5. A luggage caster as defined in claim 1, wherein: the support (1) comprises a base (11), a connecting plate (12) rotatably arranged below the base (11) and two mounting rods (13) fixedly arranged below the connecting plate (12), and the roller (2) and the protective cover (6) are both hinged on the mounting rods (13); the novel connecting device is characterized in that at least one group of connecting pieces (3) are rotatably arranged between the base (11) and the connecting plate (12), annular grooves (14) are respectively formed in the end faces, close to each other, of the base (11) and the connecting plate (12), the connecting pieces (3) comprise first connecting balls (31) and second connecting balls (32) which are fixedly connected, the first connecting balls (31) are rotatably arranged in the annular grooves (14) on the base (11), and the second connecting balls (32) are rotatably arranged in the annular grooves (14) on the connecting plate (12).

6. A luggage caster as defined in claim 5, wherein: the end surfaces of the first connecting ball (31) and the second connecting ball (32) are flat cutting surfaces (33).

7. A luggage caster as defined in claim 5, wherein: be provided with at least a set of locating part (4) that are used for hindering the relative base (11) pivoted of connecting plate (12) on connecting plate (12), locating part (4) are including wearing to establish locating lever (41) in connecting plate (12), connect dog (42) and setting up elastic component (43) between dog (42) and connecting plate (12) in locating lever (41) are kept away from base (11) one side, elastic component (43) are used for driving locating lever (41) and base (11) separation, locating slot (111) that supply locating lever (41) tip male are seted up to the downside of base (11).

8. A luggage caster as defined in claim 7, wherein: the limiting grooves (111) are arranged in a plurality and are distributed circumferentially along the central axis of the annular groove (14).

9. A luggage caster as defined in claim 8, wherein: and a magnet (112) is fixed on the groove wall of the limit groove (111), and the limit rod (41) is made of a metal material which is mutually attracted with the magnet (112).