A wheel assembly and runner

Abstract

The application discloses a wheel assembly and a sliding member, the wheel assembly is suitable for being installed on an object to be slid, and comprises a support, a mounting piece, a limiting piece and a rolling wheel. The rolling wheel is rotationally connected with the mounting piece along a first axis perpendicular to a first direction. The mounting piece is rotationally connected with the support along an axis extending in the first direction, and the mounting piece is suitable for rotating along the axis relative to the support when the rolling wheel abuts against the ground, so that the effect of a universal wheel is realized. The mounting piece is provided with a spiral groove, the limiting piece is sleeved on the mounting piece and is in spiral cooperation with the spiral groove. The support is provided with a supporting surface, the limiting piece is provided with a limiting surface opposite to the supporting surface, and the mounting piece slides downward and rotates under the action of gravity when the rolling wheel is in suspension and the limiting surface abuts against the supporting surface. At this time, the limiting piece is limited from falling, the mounting piece slides downward and rotates until the mounting piece stops falling so that the rolling wheel is located at a preset position. Through the arrangement, the rolling wheel can automatically rotate to the preset position when the rolling wheel is in suspension by reasonably setting parameters of the spiral groove, and user operation is not needed, so that the application is more simple and convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of product transfer, in particular to a wheel assembly and a sliding member. BACKGROUND

[0002] The universal wheels are usually installed at the bottom of the trolley to change the moving direction of the trolley; when the trolley is loaded with objects, the trolley is usually lifted by an AGV trolley to carry the trolley; if the universal wheels of the trolley are rotated outward before carrying, the trolley is easy to collide with the surrounding obstacles and cause scratches in the case of limited passage; therefore, the universal wheels need to be manually adjusted, which is troublesome. SUMMARY

[0003] The present application aims to overcome the above-mentioned defects or problems in the background art, and provides a wheel assembly and a sliding member.

[0004] To achieve the above-mentioned purpose, the present application and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0005] Solution one, a wheel assembly suitable for being installed on a to-be-slid object, comprising

[0006] a support suitable for being fixed to the to-be-slid object, provided with a support surface;

[0007] a mounting member provided with a helical groove extending along a first direction, and rotationally connected with an axis extending along the first direction of the support;

[0008] a limiting member provided with a limiting surface opposite to the support surface, sleeved on the mounting member and helically matched with the helical groove;

[0009] a roller rotationally connected with the mounting member along a first axis perpendicular to the first direction;

[0010] the mounting member is suitable for rotating relative to the support when the roller abuts against the ground; and the mounting member is suitable for sliding downward along the first direction relative to the limiting member and rotating along the axis extending along the first direction due to gravity when the roller is suspended and the limiting surface abuts against the support surface, until the mounting member stops falling to make the roller be located at a preset position.

[0011] Solution two, based on solution one, when there is a gap between the limiting surface and the support surface, the limiting member is suitable for sliding downward relative to the mounting member and rotating along the axis extending along the first direction due to gravity, until the limiting surface abuts against the support surface, or the limiting member slides to the lowermost end of the helical groove.

[0012] Scheme three, based on scheme one, there is a gap between the limiting surface and the supporting surface when the roller is in contact with the ground, and the mounting member and the limiting member are adapted to slide downward together relative to the support when the roller is in the air and there is a gap between the limiting surface and the supporting surface.

[0013] Scheme four, based on scheme one, further comprising a positioning pin and a biasing member, the support is provided with a sliding groove extending in a direction perpendicular to the first direction; the mounting member is provided with a positioning slot, the positioning pin is provided with a positioning protrusion, the positioning protrusion is in sliding connection with the sliding groove and is adapted to exit or enter the positioning slot, and the two ends of the biasing member act on the positioning pin and the support respectively to make the positioning pin move in the direction of entering the positioning slot, when the positioning pin enters the positioning slot, the mounting member stops falling and rotating to make the roller be in a preset position.

[0014] Scheme five, based on scheme one, one of the support and the mounting member is provided with a positioning slot, and the other is provided with a positioning protrusion matched with the positioning slot, the positioning protrusion has elasticity, and when the positioning slot is matched with the positioning protrusion, the mounting member stops falling and rotating to make the roller be in a preset position.

[0015] Scheme six, based on scheme one, further comprising a magnetic member and a magnetic attraction member, one of the magnetic member and the magnetic attraction member is installed on the support, and the other is installed on the mounting member, when the magnetic member and the magnetic attraction member are magnetically matched, the mounting member stops falling and rotating to make the roller be in a preset position.

[0016] Scheme seven, based on scheme one, further comprising a latch, the support is provided with a through hole, the mounting member is provided with a slot, the mounting member is adapted to sit on the limiting member or the support to stop falling when falling, when the mounting member stops falling, the slot corresponds to the through hole, and the latch is adapted to penetrate the through hole and be inserted into the slot.

[0017] Scheme eight, based on scheme four to scheme six, when the roller is in rolling cooperation with the ground, the support slides downward relative to the mounting member due to its own gravity or the gravity of the object to be slid to allow the mounting member to rotate.

[0018] Scheme nine, based on scheme four to scheme seven, the spiral groove extends to the top surface of the mounting member, and when the mounting member stops falling, the limiting member does not disengage from the spiral groove.

[0019] Scheme ten, a sliding member, comprising an object to be slid and a wheel assembly as claimed in any one of schemes one to nine, and the support is fixedly connected to the object to be slid.

[0020] In the eleventh aspect based on the tenth aspect, the sliding member is a trolley, and when the roller is located at the preset position, the axis of the roller is perpendicular to the carrying path of the sliding member, or the roller has the maximum overlapping area with the sliding object or the support in a projection plane perpendicular to the first direction.

[0021] From the above description of the present application and its preferred embodiments, relative to the prior art, the technical scheme of the present application and its preferred embodiments have the following beneficial effects due to the use of the following technical means:

[0022] 1. In the first aspect and its preferred embodiments, a wheel assembly suitable for being mounted on a sliding object, comprising a support, a mounting member, a limiting member and a roller.

[0023] The support is suitable for being fixedly connected with the sliding object to realize the mounting of the wheel assembly.

[0024] The roller is rotationally connected with the mounting member along a first axis perpendicular to the first direction, and the roller is used to contact the ground to roll on the ground. The mounting member is rotationally connected with the support along an axis extending in the first direction, and the mounting member is suitable for rotating relative to the support along the axis when the roller contacts the ground to change the direction of the roller, thereby realizing the effect of a universal wheel.

[0025] The mounting member is provided with a helical groove extending in the first direction, and the limiting member is sleeved on the mounting member and helically matched with the helical groove, so that the two can slide relative to each other along the first direction while rotating along the axis extending in the first direction.

[0026] The support is provided with a supporting surface, and the limiting member is provided with a limiting surface opposite to the supporting surface. When the roller is suspended and the limiting surface abuts against the supporting surface, at this time, the limiting member is limited to fall, and the mounting member slides downward relative to the limiting member along the first direction and rotates along the axis extending in the first direction due to the action of gravity, until the mounting member stops falling to make the roller located at the preset position. Through this setting, the roller can be automatically rotated to the preset position when it is suspended by reasonably setting the parameters of the helical groove, without the need for user operation, which is more simple and convenient.

[0027] 2. In the second aspect and its preferred embodiments, when there is a gap between the limiting surface and the supporting surface, the limiting member is suitable for sliding downward relative to the mounting member along the axis extending in the first direction and rotating along the first direction due to the action of gravity, until the limiting surface abuts against the supporting surface, or the limiting member slides to the lowermost end of the helical groove, so that at least part of the helical groove is present above the limiting member when the roller contacts the ground, thereby facilitating the falling and rotating of the mounting member when the trolley is jacked up next time.

[0028] 3. In Scheme 3 and its preferred embodiments, when the roller is in contact with the ground, there is a gap between the limiting surface and the supporting surface. If the design is such that the limiting surface and the supporting surface are already in contact in this state, then during manufacturing, if there is a threaded groove, the mounting part may be unable to rotate to the preset position during free rotation due to the threaded groove and the limiting part locking together. When the roller is suspended and there is a gap between the limiting surface and the supporting surface, since the limiting part is not supported, the mounting part and the limiting part are suitable for sliding downwards relative to the bracket until the limiting surface abuts the supporting surface, triggering the falling and rotation of the mounting part.

[0029] 4. In Scheme 4 and its preferred embodiments, although the automatic rotation of the roller is achieved, vibration may occur during handling, causing the mounting component to rotate and the roller position to deviate from the preset position. In this scheme, the bracket is provided with a sliding groove extending in a direction perpendicular to the first direction; the mounting component is provided with a positioning groove, and the positioning pin is provided with a positioning protrusion. The positioning protrusion is slidably connected to the sliding groove and is adapted to exit or enter the positioning groove. The two ends of the biasing member act on the positioning pin and the bracket respectively, so that the positioning pin moves in the direction of entering the positioning groove. When the positioning pin enters the positioning groove, the mounting component stops to make the roller position in the preset position. Through the cooperation of the positioning protrusion and the positioning groove, the mounting component is prevented from rotating and simultaneously locked to prevent the mounting component from falling. The use of the biasing member can provide a force to the positioning pin, reduce the accuracy requirement of the cooperation between the positioning protrusion and the positioning groove, and provide a force to the mounting component to prevent the positioning protrusion from exiting the positioning groove.

[0030] 5. In Scheme 5 and its preferred embodiments, in this scheme, one of the bracket and the mounting component is provided with a positioning groove, and the other of the two is provided with a positioning protrusion that cooperates with the positioning groove. The positioning protrusion is elastic to facilitate entering or exiting the positioning groove. When the positioning groove and the positioning protrusion cooperate, the mounting component stops falling so that the roller is located in a preset position. Through the cooperation between the positioning protrusion and the positioning groove, the mounting component is prevented from rotating and is simultaneously locked to prevent the mounting component from falling.

[0031] 6. In Scheme 6 and its preferred embodiments, one of the magnetic component and the magnetic suction component is installed on the bracket, and the other is installed on the mounting component. The magnetic component is adapted to magnetically cooperate with the magnetic suction component to stop the mounting component from falling. Through the cooperation between the magnetic component and the magnetic suction component, the mounting component is prevented from rotating and at the same time, the mounting component is prevented from falling.

[0032] 7. In Scheme 7 and its preferred embodiments, the bracket is provided with a through hole, and the mounting component is provided with a slot. The mounting component is adapted to sit on the limiting component or the bracket to stop falling when it falls. When the mounting component stops falling, the slot corresponds to the through hole, and the pin is adapted to pass through the through hole and be inserted into the slot, thereby preventing the mounting component from rotating and preventing the mounting component from falling at the same time.

[0033] 8、Scheme eight and its preferred embodiments, when the roller is in rolling contact with the ground, the bracket slides downward relative to the mounting member due to its own gravity or the gravity of the object to be slid, to allow the mounting member to rotate. In schemes five and six, because the bracket slides relative to the mounting member, the relative positions of the positioning protrusions and the positioning grooves change, the positioning protrusions exit the positioning grooves, achieving unlocking, at this time, the mounting member can rotate, achieving the effect of a universal wheel. For scheme seven, because the bracket slides relative to the mounting member, the relative positions of the magnetic member and the magnetic attraction member change, the magnetic force weakens or does not affect each other, so that the mounting member can rotate.

[0034] 9、Scheme nine and its preferred embodiments, the spiral groove extends to the top surface of the mounting member, the limiting member can be directly installed from above the mounting member, which is simple and convenient, and when the mounting member stops, the limiting member does not disengage from the spiral groove, preventing the trouble caused by the need to reassemble the limiting member.

[0035] 10、Scheme ten and its preferred embodiments, a sliding member, including an object to be slid and the above-mentioned wheel assembly, the bracket is fixedly connected to the object to be slid, which has the beneficial effects brought by the above-mentioned wheel assembly.

[0036] 11、Scheme eleven and its preferred embodiments, the sliding member is a trolley, when the roller is in a predetermined position, the axis of the roller is perpendicular to the path of the sliding member being transported, or in a projection plane perpendicular to the first direction, the roller has the maximum overlapping area with the object to be slid or the bracket, to reduce the area of the roller exposed and reduce scratching. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0038] Figure 1 It is an exploded view of the wheel assembly in embodiment one;

[0039] Figure 2 It is a schematic view of the wheel assembly when the roller is in contact with the ground in embodiment one;

[0040] Figure 3 It is a top view of Figure 2 the corresponding wheel assembly;

[0041] Figure 4 It is a schematic view of the wheel assembly when the limiting surface is in contact with the supporting surface in embodiment one;

[0042] Figure 5 It is a schematic view of the wheel assembly when the mounting member stops in embodiment one;

[0043] Figure 6 is Figure 5 a top view of the wheel assembly corresponding to the above figure;

[0044] Figure 7 is a schematic view of the wheel assembly when the rolling wheel in embodiment one is re-contacted with the ground;

[0045] Figure 8 is a schematic view of the wheel assembly when the limiting piece in embodiment one falls to the bottom end of the spiral groove;

[0046] Figure 9 is a schematic view of the sliding piece in embodiment one;

[0047] Figure 10 is a schematic view of the AVG trolley carrying the sliding piece in embodiment one;

[0048] Figure 11 is a schematic view of the wheel assembly when the mounting piece stops falling in embodiment two;

[0049] Figure 12 is a schematic view of the wheel assembly when the mounting piece stops falling in embodiment three;

[0050] Figure 13 is a schematic view of the wheel assembly when the mounting piece stops falling in embodiment four.

[0051] Main figure mark explanation:

[0052] Wheel assembly 1; support 11; first cavity 111; support surface 1111; second cavity 112; sliding groove 1121; through hole 113; mounting piece 12; spiral groove 121; positioning groove 122; insertion groove 123; limiting piece 13; limiting surface 131; rolling wheel 14; positioning pin 15; positioning protrusion 151; biasing piece 16; magnetic piece 17; magnetic attraction piece 18; insertion pin 19; object to be slid 2; AVG trolley 3. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are preferred embodiments of the present application, and should not be regarded as exclusion of other embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0054] In the claims, specification, and above drawings of the present application, unless otherwise explicitly limited, the use of the terms "first", "second", or "third" and the like, is not to be construed as applying to any particular order, but is intended to identify different objects for the purpose of distinguishing one from another.

[0055] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this invention, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of this invention.

[0056] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this invention should be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection by other means or components.

[0057] In the claims, description and accompanying drawings of this invention, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0058] refer to Figures 1-10 A sliding component includes an object to be slid (2) and a wheel assembly (1). The sliding component can be a material cart or other objects that need to slide. In this embodiment, a material cart is used as an example. Materials can be placed on top of the material cart.

[0059] The object to be glided 2 is a vehicle body, which is supported by the wheel assembly 1 and can glide on the ground via the wheel assembly 1.

[0060] refer to Figure 1 The wheel assembly 1 is suitable for installation on the object to be glided 2. The wheel assembly 1 includes a bracket 11, a mounting component 12, a limiting component 13, a roller 14, a positioning pin 15, and an biasing component 16.

[0061] refer to Figure 2 The bracket 11 is fixed to the bottom of the object to be slidable 2. For example, the bracket 11 and the object to be slidable 2 can be detachably connected, such as by screws, snap-fit, or threaded connection. Alternatively, the bracket 11 and the object to be slidable 2 can be non-detachably connected, such as by welding. The bracket 11 has a first cavity 111 and a second cavity 112 that are interconnected and arranged sequentially along a first direction. Figure 2The first cavity 111 is provided with an opening facing the object 2 to be slid, and the bottom of the first cavity 111 is provided with a supporting surface 1111 facing the object 2 to be slid. The second cavity 112 is provided with an opening facing the roller 14. The second cavity 112 is further provided with two sliding grooves 1121 extending along a direction perpendicular to the first direction.

[0062] With reference to Figure 2 , the mounting member 12 is adapted to be rotationally connected with the bracket 11 along an axis extending in the first direction, and the mounting member 12 is provided with a helical groove 121 extending along the first direction and extending to the top surface of the mounting member 12.

[0063] With reference to Figure 2 , the limiting member 13 is a nut, and the limiting member 13 is provided with a limiting surface 131 opposite to the supporting surface 1111, which is formed by the lower end surface of the limiting member 13. The limiting member 13 is sleeved on the mounting member 12 and is helically matched with the helical groove 121, and the helical matching enables the limiting member 13 and the mounting member 12 to relatively move along the first direction and to rotate around the axis extending in the first direction, such as the structure of a hand-pushed flying saucer toy. In this embodiment, when there is a gap between the limiting surface 131 and the supporting surface 1111, the limiting member 13 is adapted to slide downward relative to the mounting member 12 and to rotate around the axis extending in the first direction due to gravity until the limiting surface 131 abuts against the supporting surface 1111 or the limiting member 13 slides to the lowermost end of the helical groove 121, at which time the limiting member 13 is supported and no longer slides downward or rotates.

[0064] With reference to Figure 2 , the roller 14 is rotationally connected with the mounting member 12 along a first axis perpendicular to the first direction, and the roller 14 is used to contact the ground during use and is adapted to roll relative to the ground.

[0065] With reference to Figure 2 , the mounting member 12 is adapted to rotate relative to the bracket 11 when the roller 14 abuts against the ground, and at this time, there is a gap between the limiting surface 131 and the supporting surface 1111. With reference to Figure 4 , when the roller 14 is in the air and there is a gap between the limiting surface 131 and the supporting surface 1111, the mounting member 12 and the limiting member 13 are adapted to slide downward together relative to the bracket 11. Figure 5 , the mounting member 12 is adapted to slide downward along the first direction and to rotate around the axis extending in the first direction relative to the limiting member 13 due to gravity when the roller 14 is in the air and the limiting surface 131 abuts against the supporting surface 1111, until the mounting member 12 stops falling so that the roller 14 is located at a predetermined position. The falling of the mounting member 12 refers to the falling of the mounting member 12 relative to the fixing member due to its own gravity.

[0066] In this embodiment, with reference to Figure 2 , Figure 5The mounting member 12 is stopped from falling and rotating by the positioning pin 15 and the biasing member 16. Specifically, the mounting member 12 is provided with a positioning slot 122, and the positioning pin 15 is installed in the sliding groove 1121. The positioning pin 15 is provided with a positioning protrusion 151, which is adapted to slide in a direction perpendicular to the first direction to exit or enter the positioning slot 122. In this embodiment, at least one of the positioning protrusion 151 or the positioning slot 122 is provided with a guide arc surface or a guide inclined surface to facilitate the positioning protrusion 151 to exit or enter the positioning slot 122.

[0067] With reference to Figure 5 When the positioning pin 15 enters the positioning slot 122, the mounting member 12 is locked by the positioning pin 15, and the mounting member 12 can no longer slide downward and rotate. The mounting member 12 is stopped from falling, and correspondingly, the roller 14 is located at a preset position. When the mounting member 12 is stopped from falling, the limiting member 13 is not separated from the spiral groove 121 to ensure stability during use. Figure 6 When the roller 14 is located at the preset position, the axis of the roller 14 is perpendicular to the carrying path of the sliding member, or on a projection plane perpendicular to the first direction (i.e., the ground). The area of overlap between the roller 14 and the object to be slid 2 is maximized, or the area of overlap between the roller 14 and the support 11 is maximized, to prevent the roller 14 from protruding from the support 11 and the object to be slid 2, which can cause collision during the carrying and sliding of the sliding member. Of course, in other application scenarios, the preset position can be different from the above-described preset position, and the user can determine the preset position according to the corresponding target.

[0068] The two ends of the biasing member 16 act on the positioning pin 15 and the support 11, respectively, to move the positioning pin 15 in a direction of entering the positioning slot 122. Specifically, the biasing member 16 is a spring, and the two ends of the biasing member 16 act on the bottom of the sliding groove 1121 and the positioning pin 15, respectively.

[0069] With reference to Figure 8 When the roller 14 rolls on the ground, the support 11 slides downward relative to the mounting member 12 due to its own gravity or the gravity of the object to be slid 2, so that the positioning slot 122 is disengaged from the positioning protrusion 151 to allow the mounting member 12 to slide in the first direction and rotate about the axis extending in the first direction.

[0070] An example of the use of a dolly is as follows:

[0071] With reference to Figure 2 , Figure 3 In the initial state, the roller 14 of the dolly is in contact with the ground. Since the mounting member 12 can rotate relative to the support 11 in the first direction, the direction of movement of the dolly can be adjusted.

[0072] With reference to Figure 4When the AVG trolley 3 lifts the trolley, the mounting member 12 and the roller 14 are suspended, and the mounting member 12, the roller 14 and the limiting member 13 fall under the action of gravity. At this time, the mounting member 12 does not rotate relative to the support 11 until the limiting surface 131 abuts against the supporting surface 1111 (here, the relative movement is described, and in practice, the support 11 can first rise so that the limiting surface 131 abuts against the supporting surface 1111, and with the continuous lifting, the mounting member 12 and the roller 14 are gradually suspended).

[0073] With reference to Figure 5 , Figure 6 The mounting member 12 continues to fall, and since the mounting member 12 is screw-coupled with the limiting member 13, the mounting member 12 rotates while falling. During the rotation of the mounting member 12, when the positioning groove 122 is opposite to the positioning pin 15, the positioning pin 15 enters the positioning groove 122 under the action of the biasing member 16 to clamp the mounting member 12, so that the mounting member 12 no longer rotates and falls. At this time, the mounting member 12 stops falling so that the roller 14 is located at a preset position. At this time, the limiting member 13 has a distance from the lowermost end of the screw groove 121, and the limiting member 13 does not disengage from the uppermost end of the screw groove 121.

[0074] With reference to Figure 7 When the AVG trolley 3 places the trolley on the ground, the support 11 slides downward relative to the mounting member 12 due to the gravity of the support 11 or the trolley body, so that the positioning pin 15 also slides downward and disengages from the positioning groove 122. At this time, the mounting member 12 disengages from the stop position and is no longer limited in rotation by the positioning pin 15, so that the mounting member 12 can rotate relative to the support 11. With reference to Figure 8 At this time, the limiting member 13 is located above the supporting surface 1111, and the limiting surface 131 has a distance from the supporting surface 1111. The limiting member 13 rotates and falls under the action of its own gravity until the limiting member 13 is located at the lowermost end of the screw groove 121, waiting for the next lifting.

[0075] Compared with the prior art, the embodiment has the following beneficial effects:

[0076] In an exemplary embodiment, a wheel assembly 1 adapted to be mounted on a to-be-slid object 2 includes a support 11, a mounting member 12, a limiting member 13 and a roller 14.

[0077] The support 11 is adapted to be fixedly connected with the to-be-slid object 2 to achieve the mounting of the wheel assembly 1.

[0078] The roller 14 is rotationally connected with the mounting member 12 along a first axis perpendicular to a first direction, and the roller 14 is used to contact the ground to roll on the ground. The mounting member 12 is rotationally connected with the support 11 along an axis extending in the first direction, and the mounting member 12 is adapted to rotate relative to the support 11 along the axis when the roller 14 abuts against the ground, so that the direction of the roller 14 changes to achieve the effect of a universal wheel.

[0079] The mounting member 12 is provided with a helical groove 121 extending along the first direction, and the limiting member 13 is sleeved on the mounting member 12 and helically matched with the helical groove 121, so that the two can slide relative to each other along the first direction while rotating along the axis extending in the first direction.

[0080] The bracket 11 is provided with a supporting surface 1111, and the limiting member 13 is provided with a limiting surface 131 opposite to the supporting surface 1111. When the roller 14 is suspended and the limiting surface 131 abuts against the supporting surface 1111, at this time, the limiting member 13 is limited to fall, and the mounting member 12 slides downward relative to the limiting member 13 along the first direction and rotates along the axis extending in the first direction due to the action of gravity, until the mounting member 12 stops falling so that the roller 14 is located at the preset position. Through the above arrangement, the roller 14 can be automatically rotated to the preset position when it is suspended by reasonably setting the parameters of the helical groove 121, without the need for user operation, which is more simple and convenient.

[0081] In an exemplary embodiment, when there is a gap between the limiting surface 131 and the supporting surface 1111, the limiting member 13 is adapted to slide downward relative to the mounting member 12 along the axis extending in the first direction and rotate along the axis extending in the first direction due to the action of gravity, until the limiting surface 131 abuts against the supporting surface 1111, or the limiting member 13 slides to the lowermost end of the helical groove 121, so that at least part of the helical groove 121 is present above the limiting member 13 when the roller 14 abuts against the ground, thereby facilitating the falling and rotating of the mounting member 12 when the dolly is jacked up next time.

[0082] In an exemplary embodiment, when the roller 14 abuts against the ground, there is a gap between the limiting surface 131 and the supporting surface 1111. If it is designed that the limiting surface 131 and the supporting surface 1111 have already abutted in this state, then during the processing and manufacturing, if the thread groove, the mounting member 12 may be locked due to the thread groove and the limiting member 13 during the free rotation, resulting in the inability to rotate to the preset position.

[0083] When the roller 14 is suspended and there is a gap between the limiting surface 131 and the supporting surface 1111, at this time, since the limiting member 13 is not supported, the mounting member 12 and the limiting member 13 are adapted to slide downward together relative to the bracket 11 until the limiting surface 131 abuts against the supporting surface 1111, triggering the falling and rotating of the mounting member 12.

[0084] In the above scheme, although the automatic rotation of the roller 14 is realized, there may be shaking during the carrying process, causing the mounting member 12 to rotate, so that the position of the roller 14 deviates from the preset position. In this scheme, the bracket 11 is provided with a sliding groove 1121 extending in a direction perpendicular to the first direction; the mounting member 12 is provided with a positioning groove 122, the positioning pin 15 is provided with a positioning protrusion 151, the positioning protrusion 151 is in sliding connection with the sliding groove 1121 and is adapted to exit or enter the positioning groove 122, the two ends of the biasing member 16 act on the positioning pin 15 and the bracket 11 respectively, so that the positioning pin 15 moves in the direction of entering the positioning groove 122, when the positioning pin 15 enters the positioning groove 122, the mounting member 12 stops falling so that the roller 14 is located at the preset position, through the cooperation of the positioning protrusion 151 and the positioning groove 122, the mounting member 12 is prevented from rotating and being clamped at the same time, and the mounting member 12 is prevented from falling. The use of the biasing member 16 can provide a force to the positioning pin 15, reduce the precision requirement of the cooperation of the positioning protrusion 151 and the positioning groove 122, and provide a force to the mounting member 12 to prevent the positioning protrusion 151 from exiting the positioning groove 122.

[0085] In an exemplary embodiment, when the roller 14 is in rolling cooperation with the ground, the bracket 11 slides downward relative to the mounting member 12 due to its own gravity or the gravity of the object to be slid 2, so as to allow the mounting member 12 to rotate. Since the bracket 11 slides relative to the mounting member 12, the relative positions of the positioning protrusion 151 and the positioning groove 122 change, the positioning protrusion 151 exits the positioning groove 122, and the unlocking is realized. At this time, the mounting member 12 can rotate, realizing the effect of the universal wheel.

[0086] In an exemplary embodiment, the spiral groove 121 extends to the top surface of the mounting member 12, and the limiting member 13 can be directly mounted from above the mounting member 12, which is simple and convenient, and when the mounting member 12 stops falling, the limiting member 13 does not disengage from the spiral groove 121, preventing the trouble caused by the need to reassemble the limiting member 13.

[0087] In an exemplary embodiment, a sliding member includes the object to be slid 2 and the above-mentioned wheel assembly 1, and the bracket 11 is fixedly connected to the object to be slid 2, which has the beneficial effects brought by the above-mentioned wheel assembly 1.

[0088] In an exemplary embodiment, the sliding member is a dolly, and when the roller 14 is located at the preset position, the axis of the roller 14 is perpendicular to the carrying path of the sliding member, or in the projection plane perpendicular to the first direction, the overlapping area of the roller 14 and the object to be slid 2 or the bracket 11 is maximum, so as to reduce the exposed area of the roller 14 and reduce the scratching.

[0089] Embodiment two

[0090] Different from embodiment one, the structure for stopping the mounting member 12 from falling is different. In this embodiment, the biasing member 16 is not provided, and specifically, reference is made toFigure 11 One of the bracket 11 and the mounting 12 is provided with a positioning slot 122, and the other is provided with a positioning protrusion 151 matched with the positioning slot 122, the positioning protrusion 151 is elastic to enter and exit the positioning slot 122. When the positioning slot 122 and the positioning protrusion 151 are matched, the mounting 12 is stopped from falling and rotating to make the roller 14 be in the preset position, and when the roller 14 falls to the ground, the bracket 11 slides downward relative to the mounting 12 due to the gravity of the bracket 11 or the gravity of the object 2 to be slid, and the positioning slot 122 and the positioning protrusion 151 are disengaged to allow the mounting 12 to rotate.

[0091] The use process is similar to that of the first embodiment, and details are not repeated here.

[0092] Embodiment Three

[0093] Different from the first embodiment, the structure for stopping the mounting 12 from falling is different, in the embodiment, referring to Figure 12 The wheel assembly 1 further comprises a magnetic member 17 and a magnetic attraction member 18, one of the magnetic member 17 and the magnetic attraction member 18 is arranged on the bracket 11, and the other is arranged on the mounting 12, the magnetic member 17 is adapted to be magnetically matched with the magnetic attraction member 18 to stop the mounting 12 from falling and rotating, one of the magnetic member 17 and the magnetic attraction member 18 is a magnet, and the other is an iron sheet or a corresponding magnet. When the roller 14 falls to the ground, the bracket 11 slides downward relative to the mounting 12 due to the gravity of the bracket 11 or the gravity of the object 2 to be slid, so that the magnetic member 17 and the magnetic attraction member 18 are dislocated and disengaged to allow the mounting 12 to rotate.

[0094] The use process is similar to that of the first embodiment, and details are not repeated here.

[0095] Embodiment Four

[0096] Different from the first embodiment, the structure for stopping the mounting 12 from falling is different, and in the above embodiments, the mounting 12 is stopped from falling and rotating at the same time, in the embodiment, referring to Figure 13 The mounting 12 is stopped from falling and rotating separately, specifically, the wheel assembly 1 further comprises a pin 19, the bracket 11 is provided with a through hole 113, and the mounting 12 is provided with a slot 123, the mounting 12 is adapted to be seated on the limiting member 13 or the bracket 11 to stop falling when falling, when the mounting 12 is stopped from falling, the slot 123 corresponds to the through hole 113, and the pin 19 is adapted to be inserted into the slot 123 after penetrating through the through hole 113 to stop the mounting 12 from rotating, and when it is needed to be unlocked, the pin 19 can be pulled out. The pin 19 can be assembled by screwing with the through hole 113, or can be assembled by simple insertion.

[0097] The use process is similar to that of the first embodiment, and details are not repeated here.

[0098] In other embodiments, the limiting member 13 can be fixedly integrated with the bracket 11.

[0099] The above description and the accompanying drawings of the embodiments are used to explain the scope of the present application, but do not constitute a limitation on the scope of the present application. Through the inspiration of the present application or the above-mentioned embodiments, the person skilled in the art combines the common knowledge, the ordinary technical knowledge in the art and / or the prior art, and obtains the modification, equivalent replacement or other improvement of the embodiments of the present application or one part of the technical features through the logical analysis, reasoning or limited test, which should be included in the protection scope of the present application.

Claims

1. A wheel assembly adapted for mounting on an object to be glided (2), characterized in that: include A support (11) is adapted to be fixed to the object to be slid (2) and has a support surface (1111); Mounting component (12) is provided with a spiral groove (121) extending in a first direction and is rotatably connected to the bracket (11) along an axis extending in the first direction. The limiting member (13) has a limiting surface (131) opposite to the supporting surface (1111), which is sleeved on the mounting member (12) and screwed into the spiral groove (121); Roller (14), which is rotatably connected to the mounting member (12) along a first axis perpendicular to the first direction; The mounting member (12) is adapted to rotate relative to the bracket (11) when the roller (14) is in contact with the ground; and the mounting member (12) is adapted to slide downward relative to the limiting member (13) in a first direction due to gravity when the roller (14) is suspended and the limiting surface (131) is in contact with the supporting surface (1111), and rotate along the axis extending in the first direction until the mounting member (12) stops so that the roller (14) is in a preset position.

2. The wheel assembly as described in claim 1, characterized in that: When there is a gap between the limiting surface (131) and the supporting surface (1111), the limiting member (13) is adapted to slide downward relative to the mounting member (12) and rotate along the axis extending in the first direction due to gravity until the limiting surface (131) abuts against the supporting surface (1111), or the limiting member (13) slides to the lowermost end of the spiral groove (121).

3. A wheel assembly as described in claim 1, characterized in that: When the roller (14) is in contact with the ground, there is a gap between the limiting surface (131) and the supporting surface (1111). When the roller (14) is suspended and there is a gap between the limiting surface (131) and the supporting surface (1111), the mounting member (12) and the limiting member (13) are adapted to slide downward together relative to the bracket (11).

4. A wheel assembly as described in claim 1, characterized in that: It also includes a positioning pin (15) and a biasing member (16). The bracket (11) is provided with a groove (1121) extending in a direction perpendicular to the first direction. The mounting member (12) is provided with a positioning groove (122). The positioning pin (15) is provided with a positioning protrusion (151). The positioning protrusion (151) is slidably connected to the groove (1121) and is adapted to exit or enter the positioning groove (122). The two ends of the biasing member (16) act on the positioning pin (15) and the bracket (11) respectively, so that the positioning pin (15) moves in the direction of entering the positioning groove (122). When the positioning pin (15) enters the positioning groove (122), the mounting member (12) stops falling and stops rotating so that the roller (14) is located in a preset position.

5. A wheel assembly as described in claim 1, characterized in that: One of the bracket (11) and the mounting member (12) is provided with a positioning groove (122), and the other is provided with a positioning protrusion (151) that cooperates with the positioning groove (122). The positioning protrusion (151) is elastic. When the positioning groove (122) cooperates with the positioning protrusion (151), the mounting member (12) stops falling and stops rotating so that the roller (14) is located in a preset position.

6. A wheel assembly as described in claim 1, characterized in that: It also includes a magnetic component (17) and a magnetic suction component (18). One of the magnetic component (17) and the magnetic suction component (18) is mounted on the bracket (11), and the other is mounted on the mounting component (12). When the magnetic component (17) and the magnetic suction component (18) are magnetically engaged, the mounting component (12) stops falling and stops rotating so that the roller (14) is in a preset position.

7. A wheel assembly as described in claim 1, characterized in that: It also includes a pin (19), the bracket (11) is provided with a through hole (113), the mounting member (12) is provided with a slot (123), the mounting member (12) is adapted to sit on the limiting member (13) or the bracket (11) to stop falling when the mounting member (12) stops falling, the slot (123) corresponds to the through hole (113), and the pin (19) is adapted to pass through the through hole (113) and then be inserted into the slot (123).

8. A wheel assembly as described in any one of claims 4-6, characterized in that: When the roller (14) rolls with the ground, the bracket (11) slides down relative to the mounting member (12) due to its own weight or the weight of the object to be slid (2) so as to allow the mounting member (12) to rotate.

9. A wheel assembly as described in any one of claims 4-7, characterized in that: The spiral groove (121) extends to the top surface of the mounting member (12), and when the mounting member (12) stops falling, the limiting member (13) does not disengage from the spiral groove (121).

10. A sliding component, characterized in that: Includes a gliding object (2) and a wheel assembly (1) as described in any one of claims 1-9, wherein the bracket (11) is fixed to the gliding object (2).

11. A sliding component as described in claim 10, characterized in that: The sliding component is a material cart. When the roller (14) is in a preset position, the axis of the roller (14) is perpendicular to the transport path of the sliding component, or on a projection plane perpendicular to the first direction, the overlapping area of ​​the roller (14) with the object to be slid (2) or the bracket (11) is the largest.

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