Universal trundle

Abstract

The utility model provides a universal trundle which comprises a trundle body and a plurality of supporting rods, the trundle body comprises a circular cavity and an outlet, the outlet is located in the bottom of the circular cavity, and a plurality of balls are arranged in the circular cavity; and the trundle ball is matched with the circular cavity, part of the trundle ball is located in the circular cavity and abuts against the ball, and the other part of the trundle ball is arranged in a protruding mode relative to the outlet. The friction force between the trundle ball and the inner wall of the circular cavity is reduced through the arrangement of the balls, smooth rolling of the trundle ball is improved, then smooth movement of the trundle body is achieved, the trundle ball can rotate by 360 degrees through the arrangement of the trundle ball in the circular cavity, and then universal movement of the trundle body and the universal trundle is achieved. The universal moving device is simple in structure, universal moving can be achieved, smooth steering can also be achieved, and application and popularization are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical structure technical field especially relates to a universal caster. BACKGROUND

[0002] Casters are divided into movable casters and fixed casters. Movable casters are also called universal wheels, and their structure allows 360-degree rotation. Fixed casters, also known as directional casters, have no rotating structure and cannot rotate.

[0003] Although the existing universal wheel can realize 360-degree rotation, the rotation process is relatively clunky and not smooth, which affects the user's experience. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims to provide a universal caster to solve the problem of rotation clunkiness.

[0005] To achieve the above purpose, the utility model provides a universal caster, which comprises:

[0006] The caster body comprises a circular cavity and an outlet. The outlet is located at the bottom of the circular cavity, and a plurality of balls are arranged in the circular cavity.

[0007] The caster ball is matched with the circular cavity, part of which is located in the circular cavity and abuts against the balls, and the other part is protrudingly arranged relative to the outlet.

[0008] Further, the caster body comprises a caster ball upper lock female and a caster ball lower lock female connected with each other. The caster ball upper lock female is provided with a first opening, and the caster ball lower lock female is provided with a second opening and an outlet opposite to each other. The first opening and the second opening are connected to form the circular cavity.

[0009] Further, the outer side wall of the first opening is provided with a first thread, and the inner side wall of the second opening is provided with a second thread matched with the first thread. The second opening is sleeved on the periphery of the first opening to realize threaded connection through the first thread and the second thread.

[0010] Further, the bottom of the caster ball lower lock female is provided with a circular ring protrusion, which is arranged around the outlet and abuts against the end of the first opening.

[0011] Further, the circular cavity is provided with a circular arc-shaped rolling groove, and the balls are located in the circular arc-shaped rolling groove and protrude relative to the circular arc-shaped rolling groove to abut against the caster ball.

[0012] Further, the universal caster further comprises a connecting portion, which is located on the caster body.

[0013] Further, the connecting part is located at the top of the caster body, and a connecting through hole is arranged at one end of the connecting part away from the caster body.

[0014] Further, the universal caster further comprises a connecting support, opposite first and second supporting lugs are arranged on the connecting support, opposite holes are arranged on the first and second supporting lugs, the connecting part is located between the first and second supporting lugs, a connecting shaft sequentially passes through the hole of the first supporting lug, the connecting through hole and the hole of the second supporting lug to connect the connecting part with the connecting support, and a positioning pin simultaneously passes through the connecting part and the connecting shaft to fixedly connect the connecting shaft with the connecting part.

[0015] Further, a limiting groove is arranged on one side of the first supporting lug away from the second supporting lug, the limiting groove is located at the periphery of the hole of the first supporting lug, one end of the connecting shaft is provided with a limiting head, and the limiting head is located in the limiting groove to limit the connecting shaft in the circumferential direction.

[0016] Further, a connecting clamping groove is further arranged on the connecting support, and the connecting clamping groove is arranged away from the first and second supporting lugs.

[0017] As can be seen from the above, the universal caster provided by the utility model realizes the movement of the caster body by arranging the caster body with the circular cavity and the outlet, so that the caster ball is located in the circular cavity and realizes rolling by contacting the outside through the outlet, and on this basis, the spherical ball is arranged in the circular cavity, so that the caster ball abuts against the spherical ball, which is beneficial to reducing the friction between the caster ball and the inner wall of the circular cavity, improving the smooth rolling of the caster ball, and further realizing the smooth movement of the caster body. The arrangement of the caster ball in the circular cavity enables the caster ball to rotate towards 360° directions, thereby realizing the universal movement of the caster body and the universal caster. The present application has simple structure, can realize universal movement and smooth turning, and is beneficial to popularization and application. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0019] Figure 1 The structure of the universal caster of the embodiment of the utility model is shown Figure 1 ;

[0020] Figure 2The utility model discloses a perspective structure schematic diagram of universal trundle (no connecting support) of embodiment;

[0021] Figure 3 The utility model discloses a structure schematic diagram of trundle ball upper lock nut of embodiment;

[0022] Figure 4 The utility model discloses a structure schematic diagram of trundle ball lower lock nut of embodiment;

[0023] Figure 5 The utility model discloses a structure schematic diagram of connecting support of embodiment;

[0024] Figure 6 The utility model discloses a structure schematic diagram of universal trundle of embodiment Figure 2 ;

[0025] Figure 7 The utility model discloses a structure schematic diagram of universal trundle and tray connection of embodiment.

[0026] In the drawing: 10, trundle body;11, circular cavity;111, arc-shaped rolling groove;112, ball bearing;12, outlet;13, trundle ball upper lock nut;131, first opening;14, trundle ball lower lock nut;141, second opening;142, annular convex;20, trundle ball;30, connecting part;31, connecting through hole;40, connecting support;41, first lug;411, limiting recess;42, second lug;43, connecting slot;50, connecting shaft;51, limiting head;60, positioning pin;70, tray;71, longitudinal edge beam;72, bottom deck. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantage of the utility model more clearly and clearly, the following is combined with specific embodiment, and the utility model is further explained in detail with reference to the drawings.

[0028] It is to be noted that, unless otherwise defined, the technical terms or scientific terms used in the utility model embodiment should be the usual meaning understood by the person skilled in the art to which the application belongs. The "first", "second" and similar words used in the application do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, when the absolute position of the described object changes, the relative positional relationship can also change accordingly.

[0029] As described in the background, casters are divided into active casters and fixed casters. The active caster, also known as a universal wheel, has a structure that allows 360-degree rotation; the fixed caster, also known as a directional caster, has no rotating structure and cannot rotate.

[0030] Although the existing universal wheel can realize 360° rotation, the rotation process is relatively clunky and not smooth, affecting the user's experience.

[0031] Based on this, the present application proposes a universal caster to realize smooth steering of the universal wheel.

[0032] The present application will be described in detail below through one or more specific embodiments.

[0033] In some embodiments, as shown in Figure 1 and Figure 2 A universal caster, comprising:

[0034] A caster body 10, comprising a circular cavity 11 and an outlet 12, the outlet 12 being located at the bottom of the circular cavity 11, and a plurality of balls 112 being provided in the circular cavity 11;

[0035] A caster ball 20, adapted to the circular cavity 11, partially located in the circular cavity 11 and abutting against the balls 112, and the other part being protruding relative to the outlet 12.

[0036] Specifically, the caster body 10 has a circular cavity 11 structure, the bottom of the circular cavity 11 is provided with an opening, i.e. the outlet 12, the caster ball 20 is located in the circular cavity 11 of the caster body 10, a part of which protrudes out of the caster body 10 through the outlet 12 to contact the ground (or other moving bearing surface, hereinafter the same), and the other part is located in the circular cavity 11 and abuts against the balls 112. When the caster ball 20 rolls relative to the balls 112 under the abutting action of the balls 112, the part of the caster ball 20 in contact with the ground also rolls and displaces relative to the ground, and correspondingly, the caster body 10 also displaces relative to the ground, i.e. the caster body 10 and the universal caster move.

[0037] In addition, the outlet 12 is smaller in diameter than the circular cavity 11, i.e. the part of the caster ball 20 protruding relative to the outlet 12 is a small part, and the caster ball 20 contacts the ground through this small part to realize rotation of the caster ball 20 relative to the ground, and further realize movement of the caster body 10 on the ground. The part of the caster ball 20 located in the circular cavity 11 is a large part, so that the caster ball 20 can be stably arranged in the circular cavity 11 under the limiting action of the outlet 12.

[0038] Need to explain, the moving direction of the caster body 10 is the same as the rotating direction of the caster ball 20, and can be adjusted at any time, only need to change the rotating force direction acting on the caster ball 20, simple structure, flexible and smooth steering and moving.

[0039] In the embodiment, by setting the caster body 10 with the circular cavity 11 and the outlet 12, the caster ball 20 is located in the circular cavity 11 and contacts with the outside through the outlet 12 to realize rolling, and then the moving of the caster body 10 is realized. On this basis, by setting the ball 112 in the circular cavity 11, the caster ball 20 abuts against the ball 112, which is conducive to reducing the friction between the caster ball 20 and the inner wall of the circular cavity 11, improving the smooth rolling of the caster ball 20, and then realizing the smooth moving of the caster body 10. The setting of the caster ball 20 in the circular cavity 11 enables the caster ball 20 to rotate towards 360° direction, and then realizes the omnidirectional moving of the caster body 10 and the universal caster. The structure of the application is simple, can realize omnidirectional moving, and can realize smooth steering, which is conducive to popularization and application.

[0040] In some embodiments, as shown in Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the caster body 10 includes a caster ball upper lock female 13 and a caster ball lower lock female 14 connected, the caster ball upper lock female 13 is provided with a first opening 131, the caster ball lower lock female 14 is provided with opposite second openings 141 and an outlet 12, the first opening 131 and the second opening 141 are connected to form the circular cavity 11.

[0041] Specifically, the caster upper lock female and the caster lower lock female are both recessed structures, the caster upper lock female and the caster lower lock female are connected through the first opening 131 and the second opening 141, the first opening 131 and the second opening 141 are connected, the recessed part of the caster upper lock female and the recessed part of the caster lower lock female form the circular cavity 11, and the outlet 12 is arranged opposite to the second opening 141, so that the outlet 12 is arranged away from the connection part of the caster upper lock female and the caster lower lock female, which is conducive to the connection stability of the caster upper lock female and the caster lower lock female, and then is conducive to the stability of the caster body 10 and the universal caster.

[0042] Need to explain, the inner wall of the circular cavity 11 formed by the caster upper lock female and the caster lower lock female is smooth, that is, the recessed structures of the caster upper lock female and the caster lower lock female are completely matched, the caster ball 20 rotates in the smooth circular cavity 11, and then is conducive to the smooth steering and moving of the universal caster.

[0043] In some embodiments, the outer sidewall of the first opening 131 is provided with a first thread, the inner sidewall of the second opening 141 is provided with a second thread matched with the first thread, and the second opening 141 is sleeved on the periphery of the first opening 131 to achieve threaded connection through the first thread and the second thread.

[0044] Specifically, the lower caster ball lock nut 14 is threadedly connected with the upper caster ball lock nut 13, specifically, the lower caster ball lock nut 14 is sleeved on the outer sidewall of the upper caster ball lock nut 13, the inner sidewall of the lower caster ball lock nut 14 is provided with a second thread, and the outer sidewall of the upper caster ball lock nut 13 is provided with a first thread, and the first thread and the second thread are connected to connect the upper caster ball lock nut 13 and the lower caster ball lock nut 14.

[0045] The threaded connection of the upper caster ball lock nut 13 and the lower caster ball lock nut 14 achieves detachable connection, which can facilitate the assembly of the caster body 10 and the caster ball 20. The assembly process is as follows: first, the caster ball 20 is placed in the lower caster ball lock nut 14 through the second opening 141, and a part of the caster ball 20 protrudes out of the lower caster ball lock nut 14 through the outlet 12, and then the lower caster ball lock nut 14 is threadedly connected with the upper caster ball lock nut 13, that is, the assembly of the caster body 10 and the caster ball 20 is completed. The assembly process is simple and smooth.

[0046] In some embodiments, as shown in Figure 4 The bottom of the lower caster ball lock nut 14 is provided with a circular protrusion 142, which surrounds the outlet 12 and abuts against the end of the first opening 131.

[0047] Specifically, in order to make the inner wall of the caster body 10 smooth, the first opening 131 end of the upper caster ball lock nut 13 and the inner sidewall end of the lower caster ball lock nut 14 abut after the threaded connection of the lower caster ball lock nut 14 and the upper caster ball lock nut 13. Since the second thread is provided on the inner sidewall of the second opening 141, the circular protrusion 142 is provided away from the second thread of the second opening 141, so that the circular protrusion 142 abuts against the end of the first opening 131, and the inner wall of the circular protrusion 142 is smoothly connected with the inner wall of the upper caster ball lock nut 13 to form the circular cavity 11, so that the caster ball 20 can smoothly rotate in the circular cavity 11 formed by the upper caster ball lock nut 13 and the lower caster ball lock nut 14.

[0048] In some embodiments, the circular cavity 11 is provided with a circular-arc-shaped rolling groove 111, the rolling ball 112 is located in the circular-arc-shaped rolling groove 111 and protrudes from the circular-arc-shaped rolling groove 111 to abut against the caster ball 20.

[0049] Specifically, the circular-arc-shaped rolling groove 111 is used to accommodate a plurality of rolling balls 112, the rolling balls 112 are used to abut against the caster ball 20, thereby facilitating smooth rotation of the caster ball 20. The circular cavity 11 is provided with the circular-arc-shaped rolling groove 111 to limit the rolling balls 112, thereby ensuring stability of the internal structure of the universal caster and facilitating assembly.

[0050] In addition, the inner side wall of the circular cavity 11 is provided with a circular-arc-shaped rolling groove 111 matched with the circular cavity 11, which is used to accommodate a plurality of rolling balls 112, so that the abutment position of the plurality of rolling balls 112 and the caster ball 20 is stable, thereby realizing smooth and stable rotation of the caster ball 20, thereby facilitating stable operation of the universal caster.

[0051] It should be noted that the circular-arc-shaped rolling groove 111 can be provided on the top of the caster ball 20 or on the top and side of the caster ball 20, so that the rolling balls 112 can play a stabilizing role on the caster ball 20, thereby facilitating smooth rotation of the caster ball.

[0052] It should be noted that the specific arrangement of the circular-arc-shaped rolling groove 111 is related to the performance parameters of the universal caster. The universal caster with a larger number of circular-arc-shaped rolling grooves 111 has higher smoothness than the universal caster with a smaller number of circular-arc-shaped rolling grooves 111. However, the number of circular-arc-shaped rolling grooves 111 is not the more the better. The larger the number of circular-arc-shaped rolling grooves 111, the larger the occupied area in the circular cavity 11, which increases the cost. In addition, the rolling balls 112 in a plurality of circular-arc-shaped rolling grooves 111 are prone to increase the failure rate, which is not cost-effective. The number of circular-arc-shaped rolling grooves 111 is preferably three or four.

[0053] In addition, when the circular-arc-shaped rolling groove 111 is arranged on the inner wall of the caster ball locking mother 13 only, the circular ring protrusion 142 abuts against the end of the first opening 131 of the caster ball locking mother 13, so that the opening of the circular-arc-shaped rolling groove 111 on the inner wall of the caster ball locking mother 13 is blocked, thereby limiting the rolling ball 112 in the circular-arc-shaped rolling groove 111, so that the rolling ball 112 is stably arranged in the circular-arc-shaped rolling groove 111, so that the caster ball 20 can rotate smoothly in the circular cavity 11 under the action of the rolling ball 112; when the circular-arc-shaped rolling groove 111 is arranged on the caster ball locking mother 13 and the caster ball locking daughter 14, the circular-arc-shaped rolling groove 111 arranged on the caster ball locking mother 13 of the circular ring protrusion is one-to-one corresponding and communicated, and the circular-arc-shaped rolling groove 111 on the circular ring protrusion is not communicated, so as to limit the rolling ball 112 in the circular-arc-shaped rolling groove 111, so as to ensure the stable movement of the rolling ball 112 in the circular-arc-shaped rolling groove 111, thereby facilitating the movement stability and smoothness of the universal caster.

[0054] In some embodiments, as shown in Figure 2 The universal caster further comprises a connecting portion 30, which is located on the caster body 10.

[0055] Specifically, the connecting portion 30 is used to connect with other structures, so that the universal caster is connected to other structures, so that the structure has the function of universal movement under the action of the universal caster. The connecting portion 30 is located on the caster body 10, the caster ball 20 is located in the circular cavity 11 inside the caster body 10, and contacts the ground (or other bearing surface, the same below) through the outlet 12, so that the caster ball 20 can rotate relative to the ground, thereby driving the caster body 10 and the connecting portion 30 to move relative to the ground. The connecting portion 30 is connected with other structures, thereby driving other structures to move on the ground. The connecting portion 30 can facilitate the connection of the universal caster and other structures, thereby improving the practicability and popularization of the universal caster.

[0056] In some embodiments, as shown in Figure 2 The connecting portion 30 is located at the top of the caster body 10, and a connecting through hole 31 is arranged at the end away from the caster body 10.

[0057] Specifically, the outlet 12 of the caster body 10 is located at the bottom of the caster body 10, the caster ball 20 extends out of the circular cavity 11 through the outlet 12 to contact the ground, the connecting portion 30 is arranged at the top of the caster body 10, so that the acting force of the structure connected by the connecting portion 30 can act vertically on the connecting portion 30, and then act on the caster body 10 and the caster ball 20, avoiding that the connecting portion 30 is subjected to stress perpendicular to the axial direction, and then easily causing damage to the connecting portion 30, arranging the connecting portion 30 at the top of the caster body 10 can increase the strength of the connecting portion 30, and then can increase the carrying capacity of the universal caster.

[0058] In addition, one end of the connecting portion 30 away from the caster body 10 is provided with the connecting through hole 31 to facilitate the connection of the connecting portion 30 with other structures, and is beneficial to the practicability of the universal caster.

[0059] In some embodiments, as shown in Figure 1 , Figure 5 and Figure 6 , the universal caster further comprises a connecting bracket 40, the connecting bracket 40 is provided with opposite first and second supporting lugs 41 and 42, the first and second supporting lugs 41 and 42 are provided with opposite holes, the connecting portion 30 is located between the first and second supporting lugs 41 and 42, a connecting shaft 50 sequentially passes through the hole of the first supporting lug 41, the connecting through hole 31 and the hole of the second supporting lug 42 to connect the connecting portion 30 with the connecting bracket 40, and a positioning pin 60 simultaneously passes through the connecting portion 30 and the connecting shaft 50 to fixedly connect the connecting shaft 50 with the connecting portion 30.

[0060] Specifically, the connecting portion 30 and the connecting bracket 40 are connected through the first and second supporting lugs 41 and 42, so that the connecting bracket 40 is connected with other structures, the connecting portion 30 and the first and second supporting lugs 41 and 42 are connected through the connecting shaft 50, and on this basis, the connecting portion 30 and the connecting shaft 50 are fixedly connected through the positioning pin 60, that is, the positioning pin 60 fixes the relative positions of the connecting shaft 50 and the connecting portion 30, avoiding that the caster body 10 rotates relative to the connecting shaft 50, and being beneficial to the running stability and practicability of the universal caster.

[0061] In addition, in order to ensure the fixing effect of the positioning pin 60, the positioning pin 60 passes through one side wall of the connecting through hole 31, then passes through the connecting shaft 50, and then passes through the other side wall of the connecting through hole 31, so as to fixedly connect the connecting shaft 50 with the connecting portion 30 where the connecting through hole 31 is located, and ensure the fixing effect of the positioning pin 60 on the connecting shaft 50 and the connecting portion 30.

[0062] It should be noted that the connecting shaft 50 is used to connect the connecting portion 30 with the first lug 41 and the second lug 42 of the connecting bracket 40, the connecting shaft 50 passes through the first lug 41, the connecting hole 31 of the connecting portion 30 and the second lug 42, and is fixedly connected with the connecting bracket 40 to avoid the rotation of the connecting shaft 50, thereby avoiding the rotation of the caster body 10, which is not conducive to the stability of the universal caster.

[0063] In some embodiments, as shown in Figure 1 and Figure 5 The first lug 41 is provided with a limiting groove 411 on the side away from the second lug 42, the limiting groove 411 is located on the periphery of the hole of the first lug 41, one end of the connecting shaft 50 is provided with a limiting head 51, and the limiting head 51 is located in the limiting groove 411 to limit the connecting shaft 50 in the circumferential direction.

[0064] Specifically, the connecting shaft 50 and the connecting bracket 40 are fixedly connected through the limiting groove 411 on the first lug 41, one end of the connecting shaft 50 is provided with a limiting head 51 which is located in the limiting groove 411 to limit the connecting shaft 50 in the circumferential direction, thereby avoiding the rotation of the connecting shaft 50 relative to the first lug 41, fixing the relative position of the connecting shaft 50 with the first lug 41 and the connecting bracket 40, and realizing the fixed connection of the connecting shaft 50 with the connecting bracket 40, thereby stably arranging the universal caster.

[0065] In addition, the limiting head 51 of the connecting shaft 50 can also limit the connecting shaft 50 in the axial direction to avoid the connecting shaft 50 from leaving the hole of the first lug 41 or the second lug 42 or the connecting hole 31, thereby facilitating the stable connection of the connecting portion 30 and the connecting bracket 40.

[0066] It should be noted that the end of the connecting shaft 50 away from the limiting head 51 is provided with a limiting hole, the limiting hole is located on the side of the second lug 42 away from the first lug 41, and a limiting rod passing through the limiting hole can limit the connecting shaft 50 in one axial direction, and the limiting head 51 and the limiting hole jointly limit the connecting shaft 50 in the axial direction, thereby ensuring the connection stability of the connecting shaft 50 with the connecting bracket 40.

[0067] For example, the limiting head 51 is a character-shaped structure, the limiting groove 411 is a character-shaped groove, and the limiting head 51 is located in the limiting groove 411 to limit the connecting shaft 50 in the circumferential direction and the axial direction.

[0068] For example, the limiting head 51 has a straight-line structure, and the limiting groove 411 has a cross-shaped groove. The limiting head 51 can be located at two positions in the limiting groove 411, such as... Figure 1 and Figure 6 As shown, the limiting groove 411 limits the limiting head 51, that is, the connecting shaft 50 can drive the caster body 10 and the caster to rotate, so as to change their position relative to the connecting bracket 40, so that the caster body 10 can switch between the folded and used states.

[0069] In some embodiments, such as Figure 5 As shown, the connecting bracket 40 is also provided with a connecting slot 43, which is located away from the first support ear 41 and the second support ear 42.

[0070] Specifically, the connecting slot 43 is used to engage with other structures so that the other structures have omnidirectional movement function. The setting of the connecting slot 43 improves the ease of connecting the omnidirectional caster with other structures, that is, it can be engaged by simply snapping it together, which is conducive to improving the installation efficiency of the omnidirectional caster.

[0071] For example, such as Figure 7 As shown, the swivel casters are mounted on a pallet 70 having multiple longitudinal side beams 71 and multiple bottom decks 72 stacked vertically. The sidewalls of the connecting slots 43 are horizontally arranged, and the horizontal distance of the connecting slots 43 is adapted to the distance between two adjacent bottom decks 72, that is, it is located between two adjacent bottom decks 72. The vertical distance of the connecting slots 43 is adapted to the width of the longitudinal side beams 71, so that the two sidewalls of the connecting slots 43 are located on both sides of the longitudinal side beams 71 and engage with the longitudinal side beams 71, thereby limiting the swivel casters in the horizontal and vertical directions, so that the swivel casters are stably connected to the pallet 70 in the horizontal direction.

[0072] It should be noted that the force exerted by the omnidirectional casters on the pallet in the vertical direction is related to the friction and clamping force between the connecting groove and the side wall of the longitudinal side beam and the bottom plate. The connecting groove can also be stably set relative to the pallet in the vertical direction.

[0073] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application (including the claims) is limited to these examples; within the scope of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of this utility model as described above, which are not provided in the details for the sake of brevity.

[0074] Embodiments of the present application are intended to encompass all such substitutions, modifications and alterations falling within the broad scope of the appended claims. Accordingly, any and all such substitutions, modifications, permutations, improvements, and the like are intended to fall within the scope of the present application.

Claims

1. A universal caster wheel characterized by, The application relates to a caster, which comprises the following parts: a caster body, which comprises a circular cavity and an outlet, the outlet being located at the bottom of the circular cavity, and a plurality of balls being arranged in the circular cavity; a caster ball, which is matched with the circular cavity, part of the caster ball being located in the circular cavity and abutting against the balls, and the other part of the caster ball being arranged protruding relative to the outlet; the caster body comprises a caster ball upper locking female part and a caster ball lower locking female part, the caster ball upper locking female part is provided with a first opening, the caster ball lower locking female part is provided with opposite second openings and an outlet, the first opening and the second openings are connected to form the circular cavity; the outer side wall of the first opening is provided with a first thread, the inner side wall of the second opening is provided with a second thread matched with the first thread, and the second opening is arranged around the first opening to realize threaded connection through the first thread and the second thread; the bottom of the caster ball lower locking female part is provided with a circular ring protrusion, the circular ring protrusion is arranged around the outlet and abuts against the end of the first opening.

2. The universal caster according to claim 1, wherein, the circular cavity is provided with a circular-arc-shaped rolling groove, the balls are located in the circular-arc-shaped rolling groove and protrude relative to the circular-arc-shaped rolling groove to abut against the caster ball.

3. The universal caster according to claim 1, wherein, a connecting part is further arranged on the caster body.

4. The universal caster according to claim 3, wherein, the connecting part is located at the top of the caster body, and a connecting through hole is arranged at the end of the caster body away from the caster body.

5. The universal caster according to claim 4, wherein, a connecting support is further arranged, the connecting support is provided with opposite first and second supporting ears, the first and second supporting ears are provided with opposite holes, the connecting part is located between the first and second supporting ears, a connecting shaft is arranged in sequence through the hole of the first supporting ear, the connecting through hole and the hole of the second supporting ear to connect the connecting part and the connecting support, and a positioning pin is arranged through the connecting part and the connecting shaft to fixedly connect the connecting shaft and the connecting part.

6. The universal caster according to claim 5, wherein, one side of the first supporting ear away from the second supporting ear is provided with a limiting recess, the limiting recess is located around the hole of the first supporting ear, one end of the connecting shaft is provided with a limiting head, and the limiting head is located in the limiting recess to limit the connecting shaft in the circumferential direction.

7. The universal caster according to claim 6, wherein, the connecting support is further provided with a connecting clamping groove, and the connecting clamping groove is arranged away from the first and second supporting ears.

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