Trundle structure

Abstract

The utility model relates to the technical field of supports, and discloses a trundle structure which comprises a rolling wheel assembly, an angle accessory and an angle adjusting piece which are sequentially connected. The roller assembly comprises a connecting support and a rolling structure, and the rolling structure can be rotatably installed on the connecting support around the axis of the rolling structure relative to the connecting support. The first end of the angle accessory is connected to the connecting support, and the second end of the angle accessory is provided with a first rotating part. The first end of the angle adjusting piece is provided with a second rotating part, the second rotating part is connected to the first rotating part, the second rotating part can rotate around the first axis relative to the first rotating part so as to change the included angle between the angle adjusting piece and the angle accessory, and the second end of the angle adjusting piece is used for being connected with the support base. A limiting structure is arranged between the first rotating part and the second rotating part and used for keeping the first rotating part and the second rotating part relatively fixed when the first rotating part and the second rotating part are relatively static. According to the trundle structure, the movable function of the support is achieved, and the universality of the trundle structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of brackets, and particularly relates to a caster structure. Background Art

[0002] Conventionally, brackets on the market are generally placed on the ground by setting an inverted Y-shaped base for use, and usually include two design schemes: immovable and movable. For immovable brackets, when users need to move the brackets, it is inconvenient for users to operate. For movable brackets, due to different models of brackets with different fork angles of the inverted Y-shaped base, corresponding casters need to be customized for different models of brackets, resulting in low universality of the casters and being not conducive to reducing development costs. Summary of the Utility Model

[0003] The utility model provides a caster structure, which can not only be used to realize the movable function of the bracket, but also improve the universality of the caster structure, and is conducive to reducing development costs.

[0004] The utility model provides a caster structure, which includes a roller assembly, an angle fitting and an angle adjuster connected in sequence;

[0005] The roller assembly includes a connecting bracket and a rolling structure, and the rolling structure is rotatably mounted on the connecting bracket relative to the connecting bracket around the axis of the rolling structure;

[0006] The first end of the angle fitting is connected to the connecting bracket, and the second end of the angle fitting is provided with a first rotating part;

[0007] The first end of the angle adjuster is provided with a second rotating part, the second rotating part is connected to the first rotating part, the second rotating part can rotate relative to the first rotating part around a first axis to change the included angle between the angle adjuster and the angle fitting, and the second end of the angle adjuster is used for connecting to a bracket base;

[0008] A limiting structure is arranged between the first rotating part and the second rotating part, and the limiting structure is used to keep the first rotating part and the second rotating part relatively fixed when they are relatively stationary;

[0009] Wherein, the first axis is perpendicular to the arrangement direction of the roller assembly, the angle fitting and the angle adjuster.

[0010] The caster structure provided by the present utility model is provided with an angle adjusting member, and the angle adjusting member is connected to the roller assembly through an angle fitting. When it is necessary to install the caster structure on the base of the bracket, the angle adjusting member can be first rotated until the axis of the second end of the angle adjusting member is parallel to the axis of the support leg of the bracket base, and then the bracket base is fixedly connected to the second end of the angle adjusting member.

[0011] The caster structure provided by the present utility model can be installed on the bracket base, thereby realizing the movable function of the bracket. Since the angle adjusting member can rotate according to different models of bracket bases, the caster structure can be installed on different models of brackets, improving the versatility of the caster structure and being beneficial to reducing the development cost.

[0012] In some possible embodiments, the first rotating portion includes a circular rotating structure, and the axis of the circular rotating structure coincides with the first axis;

[0013] The second rotating portion includes a cylindrical sleeve, and the cylindrical sleeve is sleeved on the circular rotating structure and can rotate around the axis of the circular rotating structure.

[0014] In some possible embodiments, the limiting structure includes a plurality of protruding portions provided on the circular rotating structure and a plurality of recessed portions provided on the cylindrical sleeve;

[0015] The plurality of protruding portions are uniformly arranged on the surface of the circular rotating structure facing the angle adjusting member along the circumferential direction of the circular rotating structure, and the plurality of recessed portions are uniformly arranged on the inner wall of the cylindrical sleeve along the circumferential direction of the cylindrical sleeve;

[0016] The width of the protruding portion is the same as the width of the recessed portion, the gap between adjacent two protruding portions is the same as the gap between adjacent two recessed portions, and a part of the protruding portions are respectively clamped in a part of the recessed portions.

[0017] In some possible embodiments, an elastic support member is provided between the angle fitting and the angle adjusting member, and one end of the elastic support member is connected to the first rotating portion and the other end is connected to the second rotating portion, so that the angle adjusting member can move relative to the angle fitting along the arrangement direction of the roller assembly, the angle adjusting member and the angle fitting.

[0018] In some possible embodiments, the angle fitting can rotate relative to the connecting bracket around a second axis, and the second axis is parallel to the arrangement direction of the roller assembly, the angle fitting and the angle adjusting member.

[0019] In some possible implementation schemes, a rotation support portion is provided at the first end of the angle accessory, the rotation support portion is fixedly connected to the first rotation portion, and the rotation support portion is rotatably connected to the connecting bracket around the second axis relative to the connecting bracket.

[0020] In some possible implementations, the first rotating portion includes a hemispherical receiving groove, and the axis of the hemispherical receiving groove is parallel to the arrangement direction of the roller assembly, the angle accessory and the angle adjustment member;

[0021] The second rotating part is a spherical structure, the spherical structure is located in the hemispherical receiving groove, and the spherical structure can rotate around its own axis relative to the hemispherical receiving groove.

[0022] In some possible embodiments, the first end of the angle accessory is connected to the connecting bracket via a fixing member, and the fixing member is used to limit the position of the angle accessory and the roller assembly in the arrangement direction of the roller assembly, the angle accessory and the angle adjustment member.

[0023] In some possible implementation schemes, a horizontal correction member is further included. The horizontal correction member is disposed on a side of the connecting bracket away from the angle accessory. The horizontal correction member is used to support the roller assembly so that the roller assembly remains level with the ground.

[0024] In some possible implementations, a receiving cavity is provided at the second end of the angle adjustment member, and the receiving cavity is used to receive the end of the bracket base and is fixedly connected to the end of the bracket base. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A structural schematic diagram of a support structure of a bracket base in an embodiment of the utility model;

[0026] Figure 2 It is a schematic diagram of the overall structure of the caster structure in the embodiment of the utility model;

[0027] Figure 3 This is a schematic diagram of an exploded structure of a roller assembly in an embodiment of the utility model;

[0028] Figure 4 for Figure 2 An exploded structural diagram of the caster structure;

[0029] Figure 5 A schematic diagram of the structure of an angle accessory in an embodiment of the utility model;

[0030] Figure 6 A schematic diagram of the structure of an angle adjustment member in an embodiment of the utility model;

[0031] Figure 7 This is a schematic cross-sectional structure diagram of the assembly of the angle fitting and the angle adjuster in the embodiment of the present utility model;

[0032] Figure 8 This is a schematic overall structure diagram of the assembly of the angle fitting and the angle adjuster in the embodiment of the present utility model;

[0033] Figure 9 This is a schematic cross-sectional structure diagram of the assembly of the caster structure and the support structure in the embodiment of the present utility model;

[0034] Figure 10 This is a schematic diagram of the cross-sectional structure of the assembly of the connecting bracket and the angle fitting in the embodiment of the present utility model;

[0035] Figure 11 This is an exploded structure diagram of the connecting bracket and the angle fitting in the embodiment of the present utility model;

[0036] Figure 12 This is a schematic overall structure diagram of the horizontal correction member in the embodiment of the present utility model;

[0037] Figure 13 This is a schematic structure diagram of the connecting bracket in the embodiment of the present utility model;

[0038] Figure 14 This is another schematic overall structure diagram of the caster structure in the embodiment of the present utility model;

[0039] Figure 15 It is Figure 14 a schematic cross-sectional structure diagram of the caster structure in;

[0040] Figure 16 This is another schematic cross-sectional structure diagram of the assembly of the connecting bracket and the angle fitting in the embodiment of the present utility model;

[0041] Figure 17 This is a schematic structure diagram of the angle adjuster in the embodiment of the present utility model;

[0042] Figure 18 This is another schematic cross-sectional structure diagram of the assembly of the caster structure and the support leg in the embodiment of the present utility model;

[0043] Figure 19 This is an exploded structure diagram of the angle fitting and the limit ring in the embodiment of the present utility model;

[0044] Figure 20 This is a schematic structure diagram of the fixing member in the embodiment of the present utility model.

[0045] In the figure:

[0046] 10 - Support structure; 11 - Support leg; 100 - Roller assembly; 110 - Connecting bracket; 111 - Installation groove; 112 - Installation hole; 113 - Second semi-circular rolling groove; 114 - Rotation groove; 115 - Inclined surface; 116 - Flat surface; 120 - Rolling structure; 121 - Roller; 130 - Rotation shaft; 140 - End cap; 200 - Angle fitting; 210 - Rotating support part; 211 - First semi-circular rolling groove; 212 - Limit groove; 213 - Hemispherical accommodation groove; 214 - External thread; 220 - First rotating part; 221 - Circular rotating structure; 222 - Fixed shaft; 300 - Angle adjustment part; 310 - Second rotating part; 311 - Cylindrical sleeve; 312 - Lifting lug; 313 - Strip hole; 314 - Guide groove; 315 - Spherical structure; 320 - Accommodation cavity; 330 - Locking hole; 340 - Connecting part; 400 - Horizontal correction part; 410 - First fixing surface; 420 - Second fixing surface; 430 - Avoidance groove; 500 - Limit structure; 510 - Protrusion part; 520 - Depressed part; 530 - Limit ring; 531 - Frustum-shaped card slot; 532 - Internal thread; 533 - Locking groove; 600 - Elastic support part; 700 - Connecting part; 710 - Fixed rod; 711 - First sub-rod; 712 - Second sub-rod; 720 - Disc; 800 - Fixing part; 810 - Rod part; 820 - Hook. Detailed implementation manner

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0048] Figure 1 Shows a schematic structural diagram of a support structure 10 of a bracket base in an embodiment of the present invention. Refer to Figure 1 , the casters structure in the embodiments of the present invention can be applied to a bracket, and at least a pair of inverted Y-shaped support structures 10 are provided at the base of the bracket. Exemplarily, a pair of support structures 10 may include two support legs 11, and there is a certain included angle between the two support legs 11, and this included angle can be correspondingly designed according to different usage requirements. The casters structure in this embodiment is installed at one end of the support leg 11 for contacting the ground, so as to realize the movable function of the bracket.

[0049] Figure 2 Shows a schematic overall structure diagram of the casters structure in an embodiment of the present invention. Specifically, refer to Figure 2, the caster structure in this embodiment may include a roller assembly 100, an angle fitting 200, an angle adjustment member 300, and a horizontal correction member 400. Among them, the horizontal correction member 400, the roller assembly 100, the angle fitting 200, and the angle adjustment member 300 are arranged in sequence along the first direction.

[0050] Figure 3 Fig. shows an exploded structural schematic diagram of the roller assembly 100 in an embodiment of the present invention. Referring together to Figure 2 and Figure 3 , the roller assembly 100 includes a connection bracket 110 and a rolling structure 120. The rolling structure 120 is installed on the connection bracket 110. The rolling structure 120 may be, for example, a roller 121. A part of the roller 121 protrudes from the surface of the connection bracket 110 so that the roller 121 can contact the ground and rotate relative to the connection bracket 110 about its own axis.

[0051] As an alternative embodiment, as Figure 3 shown, when installing the roller 121 on the connection bracket 110, an installation groove 111 may be provided on one side of the connection bracket 110, and installation holes 112 are respectively opened on opposite sides of the installation groove 111. The roller 121 is fixedly connected with a rotating shaft 130. The two ends of the rotating shaft 130 respectively pass through the installation holes 112 so that the roller 121 is located in the installation groove 111. The axis of the rotating shaft 130 is consistent with the axis of the roller 121. When the rotating shaft 130 rotates relative to the installation groove 111 about its own axis, the roller 121 can be driven to rotate synchronously.

[0052] In addition, both ends of the rotating shaft 130 extending out of the installation groove 111 may be respectively connected with end caps 140. The end caps 140 are fixedly connected to the connection bracket 110, and the rotating shaft 130 and the end caps 140 can rotate relative to each other. Thus, by providing the end caps 140, axial limit can be applied to the rotating shaft 130 to prevent the rotating shaft 130 from moving axially during rotation, and further prevent the roller 121 from generating axial displacement during rotation, ensuring the structural stability of the roller 121 during use.

[0053] Figure 4 Fig. shows Figure 2 an exploded structural schematic diagram of the caster structure in Figure 4 . Referring to

[0054] Figure 5 shows a schematic structural view of the angle fitting 200 in an embodiment of the present utility model. As an alternative implementation, as Figure 5 shown, the first rotating part 220 includes a circular rotating structure 221, and the axis of the circular rotating structure 221 is consistent with the first axis. A rotating support part 210 is provided at the first end of the angle fitting 200, the rotating support part 210 is connected to the connecting bracket 110, and moreover, the first rotating part 220 is fixedly connected to the rotating support part 210.

[0055] Figure 6 shows a schematic structural view of the angle adjuster 300 in an embodiment of the present utility model, Figure 7 shows a schematic cross-sectional structural view of the assembly of the angle fitting 200 and the angle adjuster 300 in an embodiment of the present utility model. Referring together to Figures 5 to 7 , the second rotating part 310 may include a cylindrical sleeve 311. An opening is provided on one side of the cylindrical sleeve 311 facing the circular rotating structure 221, so that the circular rotating structure 221 can extend into the interior of the cylindrical sleeve 311 through the opening, that is, the cylindrical sleeve 311 can be sleeved around the circular rotating structure 221 along the circumferential direction of the circular rotating structure 221. In addition, the cylindrical sleeve 311 can rotate relative to the circular rotating structure 221 around the axis of the circular rotating structure 221, thereby changing the angle between the two.

[0056] The first rotating part 220 and the second rotating part 310 are also provided with a limiting structure 500, and the limiting structure 500 can be used to limit the circular rotating structure 221 and the cylindrical sleeve 311, so that the circular rotating structure 221 and the cylindrical sleeve 311 remain relatively fixed when they are relatively stationary. In this way, when the caster structure in this embodiment is installed on the base of the bracket, the overall structure stability of the caster structure can be ensured, thereby ensuring the structure stability of the bracket.

[0057] During specific implementation, in combination with Figure 5 and Figure 6, the limiting structure 500 may include a plurality of protruding portions 510 provided on the side of the circular rotating structure 221 facing the cylindrical sleeve 311 and a plurality of recessed portions 520 provided on the inner wall of the cylindrical sleeve 311. The plurality of protruding portions 510 are arranged uniformly and spaced along the circumferential direction of the circular rotating structure, and the widths of the respective protruding portions 510 are the same. The plurality of recessed portions 520 are arranged uniformly and spaced along the circumferential direction of the circular rotating structure 221, and the widths of the respective recessed portions 520 are the same. Moreover, the width of the recessed portion 520 is the same as the width of the protruding portion 510, and the gap between two adjacent protruding portions 510 is the same as the gap between two adjacent recessed portions 520. It should be noted that the width of the protruding portion 510 can be understood as the dimension of the protruding portion 510 along the circumferential direction of the circular rotating structure 221, and the width of the recessed portion 520 can also be understood as the dimension of the recessed portion 520 along the circumferential direction of the circular rotating structure 221.

[0058] When the circular rotating structure 221 and the cylindrical sleeve 311 are relatively stationary, a part of the protruding portions 510 of the circular rotating structure 221 are clamped in a part of the recessed portions 520 of the cylindrical sleeve 311. Here, it should be understood that the protruding portions 510 of this part where the circular rotating structure 221 is clamped to the cylindrical sleeve 311 are clamped to the recessed portions 520 of the cylindrical sleeve 311 in a one-to-one correspondence, that is to say, one protruding portion 510 is clamped in one recessed portion 520. Under the clamping cooperation between the recessed portion 520 and the protruding portion 510, the cylindrical sleeve 311 cannot rotate relative to the circular rotating structure 221, thereby achieving the fixing effect between the two.

[0059] In this embodiment, the protruding portions 510 provided on the circular rotating structure 221 may be at least distributed in the semi-circular area of the circular rotating structure 221 facing the cylindrical sleeve 311, so as to increase the number of the protruding portions 510. In this way, when the cylindrical sleeve 311 rotates relative to the circular rotating structure 221 within any reasonable angular range, the effect of clamping the protruding portion 510 and the recessed portion 520 can be achieved, thereby ensuring the fixing effect between the cylindrical sleeve 311 and the circular rotating structure 221.

[0060] Of course, in some other embodiments, for example, the protruding portions 510 may also cover the surface of the circular rotating structure 221 along the circumferential direction of the circular rotating structure 221, and the cylindrical sleeve 311 can be rotated relative to the circular rotating structure 221 to any position at will.

[0061] It should be noted that the height of the convex portion 510 can also be the same as the depth of the concave portion 520, which can enhance the meshing effect between the convex portion 510 and the concave portion 520. Moreover, the gap between two adjacent convex portions 510 can also be regarded as a concave portion 520, and the gap between two adjacent concave portions 520 can also be regarded as a convex portion 510. The clamping structure between the circular rotating structure 221 and the cylindrical sleeve 311 can also be regarded as the corresponding clamping of the alternately arranged convex portions 510 and concave portions 520 and the alternately arranged concave portions 520 and convex portions 510. Through the above settings, it is more convenient to realize the rotation of the angle adjusting member 300 relative to the angle fitting 200, so that it can be rotated to any angle.

[0062] On this basis, the angle adjusting member 300 can also be made to move relative to the angle fitting 200 in the first direction. When it is necessary to rotate the angle adjusting member 300 relative to the angle fitting 200, the angle adjusting member 300 can be first moved upward relative to the angle fitting 200 until each convex portion 510 disengages from the concave portion 520, and then the angle adjusting member 300 is rotated to a preset position.

[0063] Figure 8 Fig. shows an overall structural schematic diagram of the assembly of the angle fitting 200 and the angle adjusting member 300 in an embodiment of the present invention. As an optional implementation scheme, with reference to Figure 5 to and Figure 8 , an elastic support member 600 is further provided between the angle fitting 200 and the angle adjusting member 300. One end of the elastic support member 600 is connected to the first rotating portion 220, and the other end is connected to the second rotating portion 310. When the angle fitting 200 and the angle adjusting member 300 are relatively fixed, the elastic support member 600 is in a compressed state, so as to cooperate with the limiting structure 500 to improve the locking state between the angle fitting 200 and the angle adjusting member 300.

[0064] Specifically, the second rotating portion 310 further includes two lugs 312, and the two lugs 312 can be fixedly connected to both sides of the cylindrical sleeve 311 along the axial direction of the circular rotating structure 221. The lugs 312 are provided with strip-shaped holes 313, and the strip-shaped holes 313 extend in the first direction. The first rotating portion 220 further includes a fixing shaft 222 axially passing through the circular rotating structure 221 along the axial direction of the circular rotating structure 221, and both ends of the fixing shaft 222 are respectively located in the two strip-shaped holes 313. There are two elastic support members 600, and one ends of the two elastic support members 600 are respectively connected to both ends of the fixing shaft 222, and the other end of the elastic support member 600 is connected to the bottom of the strip-shaped hole 313.

[0065] When the angle fitting 200 and the angle adjuster 300 are relatively stationary, a certain gap is maintained between the fixed shaft 222 and the top surface of the elongated hole 313, and this gap is greater than or equal to the height of the protruding portion 510. When the angle adjuster 300 is lifted upward, the gap between the fixed shaft 222 and the top surface of the elongated hole 313 can ensure that the protruding portion 510 completely disengages from the recessed portion 520, thereby facilitating the rotation of the angle adjuster 300.

[0066] In addition, as Figure 7 shown, a guiding groove 314 is further provided at the bottom of the lug 312 located in the elongated hole 313, and the guiding groove 314 communicates with the elongated hole 313. The guiding groove 314 is of a cylindrical structure, and the diameter of the guiding groove 314 can be the same as the diameter of the elastic support member 600. One end of the elastic support member 600 connected to the bottom of the elongated hole 313 can be connected to the bottom of the guiding groove 314. By providing the guiding groove 314, it can play a guiding role in the telescopic deformation of the elastic support member 600, ensuring that the elastic support member 600 can expand and contract along a preset direction, thereby realizing the relative fixation or relative rotation state between the angle fitting 200 and the angle adjuster 300.

[0067] In this embodiment, the lug 312 and the cylindrical sleeve 311 can be of an integral structure to ensure the stable connection effect between the lug 312 and the cylindrical sleeve 311.

[0068] Figure 9 Fig. shows a schematic cross-sectional structure diagram of the assembly of the caster structure and the support structure 10 in the embodiment of the present invention. Referring to Figure 9 , the second end of the angle adjuster 300 is used to connect to the base of the bracket. Specifically, a receiving cavity 320 is provided at the second end of the angle adjuster 300, and the receiving cavity 320 is of a cylindrical structure. An opening is provided on the side of the receiving cavity 320 facing away from the angle fitting 200, and one end of the support leg 11 can extend into the receiving cavity 320 through this opening and be fixed relative to the receiving cavity 320, thereby realizing the movable function of the bracket.

[0069] The axis of the receiving cavity 320 coincides with the axis of the cylindrical sleeve 311, and the receiving cavity 320 and the cylindrical sleeve 311 can be of an integral structure for easy production and manufacturing. That is to say, the angle adjuster 300 as a whole can be regarded as a cylinder, and openings and cavities communicating with the openings are respectively provided at both ends of the cylinder, and the two cavities are separated to be connected to the angle fitting 200 and the support leg 11 respectively.

[0070] During specific implementation, referring to Figure 8 and Figure 9When connecting the angle adjuster 300 to the support leg 11, the angle adjuster 300 can be rotated relative to the angle fitting 200 until the axis of the receiving cavity 320 is parallel to the axis of the support leg 11. At this time, a part of the support leg 11 can be inserted into the receiving cavity 320, and then the angle adjuster 300 and the support leg 11 can be fixed by using a locking screw inserted through the locking hole 330 to achieve the locking of the caster structure and the bracket.

[0071] If the angle between the support leg 11 and the ground changes, when assembling the caster structure and the bracket, only the angle adjuster 300 needs to be rotated relative to the angle fitting 200 to the corresponding angle to ensure that the axis of the receiving cavity 320 is parallel to the axis of the support leg 11.

[0072] Figure 10 FIG. shows a schematic cross-sectional structure of the connection between the connection bracket 110 and the angle fitting 200 in an embodiment of the present invention. Refer to Figure 10 , the rotating support portion 210 can rotate relative to the connection bracket 110 about a second axis, and the second axis can be regarded as a straight line parallel to the first direction. Or, it can also be said that the rotating support portion 210 can rotate horizontally relative to the connection bracket 110. When the rotating support portion 210 rotates, it can drive the angle adjuster 300 to rotate synchronously, so as to adjust the angle of the roller 121, so that the user can adjust the roller 121 to the expected direction according to the use requirements to move the bracket.

[0073] As an alternative embodiment, as Figure 10 shown, two first semi-circular rolling grooves 211 are provided on the side of the rotating support portion 210 facing the connection bracket 110, and two second semi-circular rolling grooves 113 are provided on the side of the connection bracket 110 facing the rotating support portion 210. The two second semi-circular rolling grooves 113 are respectively opposite to the two first semi-circular rolling grooves 211. A pair of first semi-circular rolling grooves 211 and second semi-circular rolling grooves 113 can cooperate to form a spherical rolling groove, and a ball (not shown in the figure) having the same diameter as the spherical rolling groove is provided in the spherical rolling groove, so that the rotating support portion 210 can rotate relative to the connection bracket 110 under the rolling action of the ball.

[0074] Figure 11 FIG. shows an exploded structure diagram of the connection bracket 110 and the angle fitting 200 in an embodiment of the present invention. Further, refer to Figure 10 and Figure 11, the rotating support part 210 can also be connected to the connecting bracket 110 through a connecting piece 700. Specifically, the connecting piece 700 includes a disc 720 and a fixing rod 710. The disc 720 is fixedly connected to one end of the fixing rod 710, so that the cross-section of the connecting piece 700 is integrally in a T-shaped structure. A limiting groove 212 for fixing the fixing rod 710 is provided on the side of the rotating support part 210 facing the connecting bracket 110. The fixing rod 710 can be in interference fit with the limiting groove 212, so as to ensure that the fixing rod 710 and the rotating support part 210 remain relatively fixed.

[0075] The connecting bracket 110 is provided with a rotating groove 114 coaxially arranged with the limiting groove 212. The diameter of the rotating groove 114 is smaller than the diameter of the disc 720. One end of the fixing rod 710 away from the rotating support part 210 penetrates through the rotating groove 114, and the disc 720 is located outside the rotating groove 114, so as to limit the rotating support part 210 in the first direction.

[0076] In this embodiment, the connecting piece 700 is relatively fixed to the rotating support part 210. When the rotating support part 210 rotates relative to the connecting bracket 110 under the action of the rolling balls, the connecting piece 700 can be driven to rotate synchronously relative to the connecting bracket 110. During this process, the disc 720 can limit the rotating support part 210 to prevent the angle between the rotating support part 210 and the ground from changing.

[0077] In order to further limit the rotating support part 210 in the horizontal direction, as Figure 10 and Figure 11 shown, the diameter of the rotating groove 114 is larger than the diameter of the limiting groove 212. The fixing rod 710 includes a first sub-rod 711 and a second sub-rod 712. The diameter of the first sub-rod 711 is the same as the diameter of the rotating groove 114, and the diameter of the second sub-rod 712 is slightly smaller than the diameter of the limiting groove 212, so that a stepped structure is formed at the connection position of the first sub-rod 711 and the second sub-rod 712. When the rotating support part 210 and the connecting bracket 110 are assembled through the connecting piece 700, the surface of the first sub-rod 711 facing the second sub-rod 712 can be in contact with the surface of the rotating support part 210 facing the connecting bracket 110. At this time, the connecting piece 700 can realize the height limiting effect on the rotating support part 210 by relying on its own stepped structure and the limiting effect of the limiting groove 212, so as to ensure that the rotating support part 210 can only rotate relative to the connecting bracket 110 in the horizontal direction.

[0078] Figure 12 shows an overall structural schematic diagram of the horizontal correction part 400 in an embodiment of the present invention, Figure 13 shows a structural schematic diagram of the connecting bracket 110 in an embodiment of the present invention. Referring together to Figure 4 、 Figure 12 andFigure 13 The horizontal correction member 400 is located on the side of the connecting bracket 110 away from the angle fitting 200 and is used to support the roller assembly 100 so that the entire caster structure can be placed flat on the ground. As an alternative embodiment, the side of the connecting bracket 110 facing the horizontal correction member 400 has an inclined surface 115 and a flat surface 116, and the roller 121 is arranged at the part of the connecting bracket 110 corresponding to the flat surface. Correspondingly, the side of the horizontal correction member 400 facing the connecting bracket 110 is provided with a first fixing surface 410 and a second fixing surface 420. The first fixing surface 410 is an inclined surface with a certain slope, and the second fixing surface 420 is a flat surface. When the connecting bracket 110 is placed on the horizontal correction member 400, the inclined surface 115 of the connecting bracket 110 fits the first fixing surface 410, and the flat surface 116 fits the second fixing surface 420, so that the connecting bracket 110 can be closely attached to the horizontal correction member 400.

[0079] The surface of the side of the horizontal correction member 400 away from the connecting bracket 110 is a flat surface, which can be attached to the ground, so as to ensure that the horizontal correction member 400 is placed flat on the ground.

[0080] In addition, continuing to refer to Figure 12 The part of the horizontal correction member 400 corresponding to the second fixing surface 420 is also provided with an avoidance groove 430, which can be used to avoid the roller 121 so that the roller 121 is located in the avoidance groove 430. When the bracket needs to be moved, the horizontal correction member 400 can be removed first to prevent the horizontal correction member 400 from interfering with the movement of the roller 121. After moving the bracket to the desired position, the horizontal correction member 400 is placed at the bottom of the connecting bracket 110. The horizontal correction member 400 can also play a role in limiting the bracket to prevent the caster structure from moving by itself.

[0081] A plurality of positioning posts (not shown in the figure) can also be provided on the first fixing surface 410 and the second fixing surface 420. Correspondingly, the side of the connecting bracket 110 facing the horizontal correction member 400 can also be provided with positioning holes corresponding to the plurality of positioning posts one by one. When the horizontal correction member 400 is placed at the bottom of the connecting bracket 110, the connection can be accurately positioned with the horizontal correction member 400 through the cooperation of the positioning posts and the positioning holes. On the one hand, the horizontal correction member 400 can effectively support the roller assembly 100, and on the other hand, the fixing effect between the horizontal correction member 400 and the roller assembly 100 can be enhanced to prevent the roller assembly 100 from slipping off the horizontal correction member 400.

[0082] Of course, in some other embodiments, the horizontal correction member 400 and the connecting bracket 110 can also be relatively fixed in other forms. For example, the surface roughness of the first fixing surface 410 and the second fixing surface 420 of the horizontal correction member 400 is relatively large, so as to increase the friction between the horizontal correction member 400 and the connection, thereby improving the relative fixing effect between the two.

[0083] Figure 14 Fig. shows another overall structural schematic diagram of the caster structure in the embodiment of the present invention. In some embodiments, referring to Figure 14 , the caster structure in this embodiment may include a roller assembly 100, an angle fitting 200, an angle adjustment member 300, and a horizontal correction member 400. Among them, the horizontal correction member 400, the roller assembly 100, the angle fitting 200, and the angle adjustment member 300 are arranged in sequence along the first direction. The specific structures of the horizontal correction member 400 and the roller assembly 100 in this embodiment are the same as those in Figure 2 , and will not be elaborated here.

[0084] Figure 15 Fig. shows Figure 14 a cross-sectional structural schematic diagram of the caster structure in Figure 16 Fig. shows another cross-sectional structural schematic diagram of the assembly of the connecting bracket 110 and the angle fitting 200 in the embodiment of the present invention. Figure 17 Fig. shows a structural schematic diagram of the angle adjustment member 300 in the embodiment of the present invention. Referring to Figures 15 to 17 together, the first rotating part 220 in this embodiment includes a hemispherical accommodating groove 213, and the axis of the hemispherical accommodating groove 213 is parallel to the first direction. The second rotating part 310 includes a spherical structure 315, and the spherical structure 315 is located in the hemispherical accommodating groove 213. Moreover, the diameter of the spherical structure 315 is the same as the diameter of the hemispherical accommodating groove 213. The spherical structure 315 can rotate relative to the hemispherical accommodating groove 213 around its own axis, so as to change the angle between the angle adjustment member 300 and the angle fitting 200.

[0085] Figure 18 Fig. shows another cross-sectional structural schematic diagram of the assembly of the caster structure in the embodiment of the present invention and the support leg 11. Referring to Figure 18 , the second end of the angle adjustment member 300 is provided with an accommodating cavity 320, and the axis of the accommodating cavity 320 coincides with the axis of the hemispherical accommodating groove 213. The accommodating cavity 320 can be used to accommodate the end of the support leg 11 and is fixedly connected to the support leg 11. Specifically, when installing the caster structure on the base of the bracket, the spherical structure 315 can be rotated first to make the axis of the accommodating cavity 320 parallel to the axis of the support leg 11, and then the end of the support leg 11 is extended into the accommodating cavity 320 to realize the assembly of the caster structure and the support leg 11.

[0086] The accommodating cavity 320 may also be provided with a plurality of locking holes (not shown in the figure) along the circumferential direction. When the end of the supporting part is located inside the accommodating cavity 320, the angle adjusting part 300 and the supporting leg 11 can be fixed by using locking screws passing through the locking holes to achieve the locking of the caster structure and the bracket.

[0087] Figure 19 Fig. shows an exploded structural schematic diagram of the angle fitting 200 and the limiting ring 530 in an embodiment of the present invention. Referring together Figure 15 and Figure 19 , a limiting structure 500 is provided between the first rotating part 220 and the second rotating part 310. The limiting structure 500 can be used to limit the spherical structure 315 to prevent the spherical structure 315 from rotating horizontally. As an optional implementation, the limiting structure 500 may include a limiting ring 530. The inner part of the limiting ring 530 is provided with a frustum-shaped card slot 531, and the limiting ring 530 is sleeved on the spherical structure 315 by using the frustum-shaped card slot 531.

[0088] Further, as Figure 15 shown, the diameter of the frustum-shaped card slot 531 far from the first rotating part 220 is smaller than its diameter close to the first rotating part 220, and the diameter at the largest diameter of the frustum-shaped card slot 531 is smaller than the diameter of the spherical structure 315. The limiting ring 530 can move up and down relative to the spherical structure 315 along the first direction. When the inner wall of the frustum-shaped card slot 531 of the limiting ring 530 is completely abutted against the surface of the spherical structure 315, the limiting ring 530 and the spherical structure 315 can be relatively fixed. At this time, the limiting ring 530 can play a limiting role on the spherical structure 315.

[0089] When the limiting ring 530 and the spherical structure 315 are relatively fixed, the limiting ring 530 can be locked with the angle fitting 200 through a locking structure, thereby preventing the limiting ring 530 from moving up and down along the first direction. Exemplarily, as Figure 19 shown, the outer diameter of the limiting ring 530 is larger than the diameter of the hemispherical accommodating groove 213. One side of the limiting ring 530 facing the hemispherical accommodating groove 213 is also provided with a locking groove 533. The locking groove 533 is communicated with the frustum-shaped card slot 531, so that the spherical structure 315 can enter the hemispherical accommodating groove 213 after passing through the frustum-shaped card slot 531 and the locking groove 533.

[0090] A part of the hemispherical accommodating groove 213 can extend into the locking groove 533, and the outer wall of the hemispherical accommodating groove 213 can be locked with the locking groove 533, thereby completing the fixation of the angle fitting 200 and the angle adjusting part 300. As an optional implementation, as Figure 19As shown, an external thread 214 is provided on the outer wall of the hemispherical receiving groove 213, and the external thread 214 extends in a first direction. Correspondingly, an internal thread 532 corresponding to the external thread 214 is provided on the inner wall of the locking groove 533. When it is necessary to lock the angle fitting 200 and the angle adjusting member 300, the limiting ring 530 can be spirally lowered until the inner wall of the frustum-shaped card slot 531 is completely attached to the spherical structure 315. At this time, under the cooperation of the external thread 214 and the internal thread 532, the limiting effect between the spherical structure 315 and the hemispherical receiving groove 213 can be achieved.

[0091] When it is necessary to adjust the angle between the angle adjusting member 300 and the angle fitting 200, the limiting ring 530 can be spirally moved upward so that the spherical structure 315 is separated from the state where it is completely attached to the inner wall of the frustum-shaped card slot 531. Then, the spherical structure 315 is rotated to a preset angle, and then the limiting ring 530 is spirally lowered until the inner wall of the frustum-shaped card slot 531 is completely attached to the spherical structure 315, thereby locking the limiting ring 530 and the hemispherical receiving groove 213 again.

[0092] As another alternative embodiment, the limiting ring 530 may also be provided with a screw hole (not shown in the figure) communicating with the locking groove 533. After the spherical structure 315 is rotated to a preset position, the limiting ring 530 and the hemispherical receiving groove 213 are locked by using a screw passing through the screw hole. Specifically, one end of the screw can be abutted against the outer wall of the hemispherical receiving groove 213, and the nut of the screw can be abutted against the outer wall of the locking groove 533, thereby completing the locking of the screw.

[0093] In addition, in combination with Figure 18 and Figure 19 , in this embodiment, the spherical structure 315 is fixedly connected to the receiving groove 320 through a connecting portion 340, and the axis of the connecting portion 340 coincides with the axis of the receiving groove 320. Moreover, the diameter of the connecting portion 340 is smaller than the minimum diameter of the frustum-shaped card slot 531. When the limiting ring 530 moves up and down, the connecting portion 340 will not interfere with the movement of the limiting ring 530, so that the angle adjustment of the angle adjusting member 300 can be successfully completed.

[0094] Referring again to Figure 16 , the first end of the angle fitting 200 for connecting to the connecting bracket 110 includes a rotating support portion 210, and the rotating support portion 210 can rotate relative to the connecting bracket 110 about a second axis. When the rotating support portion 210 rotates, the angle adjusting member 300 can be driven to rotate synchronously, so that the angle of the roller 121 can be adjusted, so that the user can adjust the roller 121 to a desired direction according to the use requirements to move the bracket.

[0095] As an alternative embodiment, two first semi-circular rolling grooves 211 are provided on one side of the rotating support portion 210 facing the connecting bracket 110, and two second semi-circular rolling grooves 113 are provided on one side of the connecting bracket 110 facing the rotating support portion 210. The two second semi-circular rolling grooves 113 are respectively aligned with the two first semi-circular rolling grooves 211. A pair of first semi-circular rolling grooves 211 and second semi-circular rolling grooves 113 can cooperate to form a spherical rolling groove, and a ball having the same diameter as the spherical rolling groove is arranged in the spherical rolling groove, so that the rotating support portion 210 can rotate relative to the connecting bracket 110 under the rolling action of the ball.

[0096] Figure 20 FIG. shows a schematic structural view of a fixing member 800 in an embodiment of the present invention. Further, with reference to Figure 16 and Figure 20 , the rotating support portion 210 and the connecting bracket 110 can also be connected by a fixing member 800. The fixing member 800 can be used to limit the angle fitting 200 and the connection in the first direction. Specifically, the fixing member 800 includes a rod portion 810 and hooks 820 fixed to opposite ends of the rod portion 810. A fixing hole extending in the first direction is provided between the rotating support portion 210 and the connection. The diameter of the fixing hole is smaller than the diameter of the hooks 820. The rod portion 810 of the fixing member 800 passes through the fixing hole. One of the hooks 820 abuts against the inner wall of the rotating support portion 210 outside the fixing hole, and the other hook 820 abuts against the inner wall of the connecting bracket 110 outside the fixing hole. Thus, the connecting bracket 110 and the rotating support portion 210 are limited in the first direction by the fixing member 800.

[0097] In addition, the rod portion 810 can also rotate relative to the connecting bracket 110 around the axis of the fixing hole. When the rotating support portion 210 rotates relative to the connecting bracket 110, the fixing member 800 can be driven to rotate synchronously. During this process, under the limiting action of the fixing member 800, it can be ensured that the rotating support portion 210 only rotates horizontally relative to the connecting bracket 110.

[0098] The caster structure provided by the embodiment of the present invention is used to be installed on the base of the bracket, so as to realize the movable function of the bracket. The angle adjusting member of the caster structure can rotate relative to the roller assembly, so that the accommodating cavity of the angle adjusting member can be rotated to make the axis parallel to the axis of the support leg of the base. Then, the end of the support leg is inserted into the accommodating cavity, and the accommodating cavity and the support leg are fixedly connected. Since the caster structure in the embodiment of the present invention can adjust the angle of the accommodating cavity according to different models of brackets, it can be applicable to various models of brackets, has good versatility, and is beneficial to reducing the development cost.

[0099] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model also intends to include these modifications and variations.

Claims

1. A caster structure, characterized in that: It includes a roller assembly, an angle accessory and an angle adjustment member connected in sequence; The roller assembly comprises a connecting bracket and a rolling structure, wherein the rolling structure is rotatably mounted on the connecting bracket around the axis of the rolling structure relative to the connecting bracket; The first end of the angle accessory is connected to the connecting bracket, and the second end of the angle accessory is provided with a first rotating part; The first end of the angle adjustment member is provided with a second rotating part, the second rotating part is connected to the first rotating part, the second rotating part can rotate around a first axis relative to the first rotating part to change the angle between the angle adjustment member and the angle accessory, and the second end of the angle adjustment member is used to connect to the bracket base; A limiting structure is provided between the first rotating part and the second rotating part, and the limiting structure is used to keep the first rotating part and the second rotating part relatively fixed when they are relatively stationary; Wherein, the first axis is perpendicular to the arrangement direction of the roller assembly, the angle accessory and the angle adjustment member.

2. The caster structure according to claim 1, characterized in that: The first rotating part comprises a circular rotating structure, and the axis of the circular rotating structure coincides with the first axis; The second rotating part comprises a cylindrical sleeve, which is sleeved on the circular rotating structure and can rotate around the axis of the circular rotating structure.

3. The caster structure according to claim 2, characterized in that: The limiting structure includes a plurality of protrusions arranged on the circular rotating structure and a plurality of recesses arranged on the cylindrical sleeve; The plurality of protrusions are evenly arranged on a surface of the circular rotating structure facing the angle adjusting member around the circumference of the circular rotating structure, and the plurality of recesses are evenly arranged on an inner wall of the cylindrical sleeve around the circumference of the cylindrical sleeve; The width of the protrusion is the same as that of the recess, the gap between two adjacent protrusions is the same as that between two adjacent recesses, and a part of the protrusions is snap-fitted into a part of the recess in a one-to-one correspondence.

4. The caster structure according to claim 3, characterized in that: An elastic support member is provided between the angle accessory and the angle adjustment member, one end of the elastic support member is connected to the first rotating part, and the other end is connected to the second rotating part, so that the angle adjustment member can move relative to the angle accessory along the arrangement direction of the roller assembly, the angle adjustment member and the angle accessory.

5. The caster structure according to claim 2, characterized in that: The angle accessory can rotate relative to the connecting bracket around a second axis, and the second axis is parallel to the arrangement direction of the roller assembly, the angle accessory and the angle adjustment member.

6. The caster structure according to claim 5, characterized in that: A rotation support portion is disposed at the first end of the angle accessory. The rotation support portion is fixedly connected to the first rotation portion, and the rotation support portion is rotatably connected to the connection bracket around the second axis relative to the connection bracket.

7. The caster structure according to claim 1, characterized in that: The first rotating part comprises a hemispherical receiving groove, and the axis of the hemispherical receiving groove is parallel to the arrangement direction of the roller assembly, the angle accessory and the angle adjustment member; The second rotating part is a spherical structure, the spherical structure is located in the hemispherical receiving groove, and the spherical structure can rotate around its own axis relative to the hemispherical receiving groove.

8. The caster structure according to claim 7, characterized in that: The first end of the angle accessory is connected to the connecting bracket through a fixing member, and the fixing member is used to limit the position of the angle accessory and the roller assembly in the arrangement direction of the roller assembly, the angle accessory and the angle adjustment member.

9. The caster structure according to claim 1, characterized in that: It also includes a horizontal correction piece, which is arranged on a side of the connecting bracket away from the angle accessory, and is used to support the roller assembly so that the roller assembly remains level with the ground.

10. The caster structure according to claim 1, characterized in that: The second end of the angle adjustment member is provided with a receiving cavity, and the receiving cavity is used to receive the end of the bracket base and is fixedly connected to the end of the bracket base.

Images