Caster assembly, caster mounting structure and device having the same

Abstract

The present application provides a caster assembly, including a mounting seat and a ball. A mounting groove is formed on the mounting seat; a plurality of protrusions are arranged on the inner surface of the mounting groove; the tops of at least some of the protrusions are located on the same curved surface; the ball is rotatably arranged in the mounting groove. According to the caster assembly, the caster mounting structure and the device having the same in the present application, the friction between the ball and the mounting groove can be effectively reduced.

Description

Technical Field

[0001] This application belongs to the technical field of casters, and particularly relates to a caster assembly, a caster mounting structure, and a device having the same. Background Art

[0002] Currently, for traditional casters, during the assembly process, after the rotating bearing is sleeved into the caster mounting groove, the two wheels are fitted with the rotating bearing. The installation of the caster requires the use of screw fasteners, which cannot meet the requirement of quick installation; problems often occur at the connection part between the wheel and the rotating bearing; the caster mounting plate, the steering bearing, and the rotating bearing are all metal parts, resulting in an increase in the production cost of the caster.

[0003] However, in the prior art, there are also some casters that use balls installed in ball grooves for rolling. When this caster structure moves, the contact between the balls and the caster mounting groove is surface-to-surface, with a large frictional force. Therefore, traditional casters need to apply butter to the rotating bearing to reduce the frictional force, which also gives rise to the problem of butter leakage.

[0004] Therefore, how to provide a caster assembly, a caster mounting structure, and a device having the same that can effectively reduce the frictional force between the balls and the mounting groove has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] Therefore, the technical problem to be solved by this application is to provide a caster assembly, a caster mounting structure, and a device having the same that can effectively reduce the frictional force between the balls and the mounting groove.

[0006] To solve the above problems, this application provides a caster assembly, including:

[0007] A mounting seat, on which a mounting groove is provided; a plurality of protrusions are provided on the inner surface of the mounting groove, and the tops of at least some of the protrusions are located on the same curved surface;

[0008] Balls, which are rotatably arranged in the mounting groove.

[0009] Preferably, the mounting groove is a spherical groove; and / or, the balls are spherical balls.

[0010] Preferably, the diameter of the ball is d1; the curved surface is a spherical surface, and the diameter of the spherical surface is d2, where d2 > d1; and / or, the protrusion is a hemispherical structure; and / or, the depth of the mounting groove is d3, where 7d1 / 10 ≤ d3 ≤ 17d1 / 20; and / or, a notch is provided at the mouth of the mounting groove; and / or, the diameter of the mouth of the mounting groove is d4, where d1 > d4.

[0011] Preferably, the diameter of the protrusion is d1 + d3 / 2d1.

[0012] Preferably, a positioning rod is provided on the mounting base, and the extending direction of the positioning rod is opposite to the notch direction of the mounting groove; an annular fixing member is sleeved on the positioning rod; a hook is provided on the outer peripheral side of the annular fixing member.

[0013] Preferably, a first radially extending portion and a second radially extending portion are provided on the outer peripheral side of the annular fixing member, the hook includes a first hook and a second hook, the first hook is provided on the first radially extending portion; the second hook is provided on the second radially extending portion.

[0014] Preferably, the caster assembly further includes a first mounting portion; a first positioning hole for cooperating with the positioning rod is formed on the first mounting portion; a bayonet for cooperating with the hook is further provided on the first mounting portion.

[0015] Preferably, the first mounting portion is a strip-shaped mounting plate.

[0016] According to another aspect of the present application, a caster mounting structure is provided, including a caster assembly, and the caster assembly is the above-mentioned caster assembly.

[0017] Preferably, the caster mounting structure further includes a chassis assembly; a second mounting portion is provided on the chassis assembly; when the caster assembly further includes a first mounting portion, the second mounting portion is used to cooperate with the first mounting portion to mount the caster assembly.

[0018] Preferably, the second mounting portion and the first mounting portion are fixed by snap connection.

[0019] Preferably, the second mounting portion includes a second positioning hole and a fixing portion; the second positioning hole is formed on the chassis assembly; when the caster assembly further includes a first positioning hole, the second positioning hole corresponds to the first positioning hole; the fixing portion is provided on the chassis assembly, and the fixing portion is used to fix the first mounting portion;

[0020] And / or, a recessed groove is provided on the chassis assembly, and the second mounting portion is provided in the recessed groove.

[0021] Preferably, the fixing portion includes an axial stop portion, a radial stop surface, a circumferential stop surface and an elastic buckle; the radial stop surface and the circumferential stop surface are provided on the chassis assembly; the axial stop portion is connected to both the radial stop surface and the circumferential stop surface; the axial stop portion, the radial stop surface and the circumferential stop surface are all used to mount the first mounting portion; the elastic buckle is connected to the radial stop surface; the elastic buckle includes an elastic hook, and the elastic hook faces the chassis assembly; taking the elastic hook abutting against the chassis assembly as the first position, and taking the elastic hook having the same position as the axial stop portion in the central axis direction of the positioning rod as the second position; the elastic buckle can undergo elastic deformation between the first position and the second position.

[0022] Preferably, the fixing part includes a first fixing part and a second fixing part; both the first fixing part and the second fixing part are arranged on the chassis assembly; when the first mounting part is a long mounting plate, the first fixing part is used to fix the first end of the first mounting part; the second fixing part is used to fix the second end of the first mounting part; and / or, the distance between the axial stop part and the chassis assembly is a, and the thickness of the first mounting part is b, where a = b; and / or, the distance between the contact position of the elastic hook and the chassis assembly and the circumferential stop surface is h1, and the width of the first mounting part is h2; where h1 = h2.

[0023] Preferably, the first fixing part and the second fixing part are centrosymmetric about the central axis of the second positioning hole;

[0024] Alternatively, the second positioning hole is symmetric about the first symmetry axis; the first symmetry axis is perpendicular to the central axis of the second positioning hole; the first fixing part, the second fixing part, and the first symmetry axis are parallel to each other; and the first fixing part and the second fixing part are symmetric about the first symmetry axis.

[0025] Preferably, when both ends of the first mounting part are circumferentially offset from the first fixing part and the second fixing part, it is the third position; when the first end of the first mounting part corresponds to the position of the first fixing part and the second end corresponds to the position of the second fixing part, it is the fourth position; the first mounting part can rotate and move between the third position and the fourth position.

[0026] Preferably, when the first mounting part is located at one end of the first fixing part and the second fixing part in the direction of the first symmetry axis, it is the fifth position; when the first end of the first mounting part corresponds to the position of the first fixing part and the second end corresponds to the position of the second fixing part, it is the sixth position; the first mounting part can move between the fifth position and the sixth position; and / or, the shape of the second positioning hole corresponds to the movement track of the positioning rod.

[0027] Preferably, the second mounting part further includes an avoidance groove; the avoidance groove is opened on the chassis assembly and is located between the first fixing part and the second fixing part; the shape of the avoidance groove corresponds to the movement track of the hook.

[0028] According to another aspect of the present application, a device is provided, including a caster wheel mounting structure, and the caster wheel mounting structure is the above-mentioned caster wheel mounting structure.

[0029] In the caster wheel assembly, caster wheel mounting structure, and device having the same provided by the present application, the caster wheel mounting groove has a convex structure inside, and when moving, the convex structure contacts the ball, which can reduce the contact surface between the ball and the mounting groove, and can effectively reduce the friction between the ball and the mounting groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of the caster wheel assembly according to the embodiment of the present application;

[0031] Figure 2 It is a sectional view of the caster assembly according to an embodiment of the present application;

[0032] Figure 3 It is a schematic diagram of the installation structure of the caster assembly according to an embodiment of the present application and the first installation part;

[0033] Figure 4 It is a schematic diagram of the structure of the caster assembly according to an embodiment of the present application and the first installation part;

[0034] Figure 5 It is a schematic diagram of the structure of the second installation part according to an embodiment of the present application;

[0035] Figure 6 It is a schematic diagram of the structure of the second installation part according to an embodiment of the present application;

[0036] Figure 7 is Figure 6 the cross-sectional view taken along A-A in

[0037] Figure 8 It is a schematic diagram of the installation structure of the caster assembly according to an embodiment of the present application;

[0038] Figure 9 It is a schematic diagram of the installation structure of the caster assembly according to an embodiment of the present application and the second installation part;

[0039] Figure 10 It is a top view of the installation structure of the caster assembly according to an embodiment of the present application and the second installation part;

[0040] Figure 11 It is a top view of the installation structure of the caster assembly according to an embodiment of the present application and the second installation part;

[0041] Figure 12 It is a top view of the installation structure of the caster assembly according to an embodiment of the present application and the second installation part;

[0042] Figure 13 is Figure 12 the cross-sectional view taken along C-C in

[0043] The reference numerals are shown as:

[0044] 1. Installation groove; 11. Notch; 12. Projection; 2. Ball; 31. Positioning rod; 32. Hook; 4. First installation part; 41. Bayonet; 42. First positioning hole; 5. Second installation part; 51. Second positioning hole; 52. Avoidance groove; 53. Axial stop part; 54. Elastic buckle; 55. Radial stop surface; 56. Circumferential stop surface. Detailed implementation manners

[0045] Combined with reference to Figure 1As shown, according to an embodiment of the present application, a caster assembly includes: a mounting seat and a ball 2. A mounting groove 1 is provided on the mounting seat; a plurality of protrusions 12 are provided on the inner surface of the mounting groove 1, and the tops of at least some of the protrusions 12 are located on the same curved surface; the ball 2 is rotatably disposed in the mounting groove 1. There is a protrusion 12 structure inside the caster mounting groove 1. When moving, the protrusion 12 contacts the ball, which can reduce the contact surface between the ball 2 and the mounting groove 1, and can effectively reduce the friction between the ball and the mounting groove.

[0046] Further, the mounting groove 1 is a spherical groove; and / or, the ball 2 is a spherical ball.

[0047] Further, the diameter of the ball 2 is d1; the curved surface is a spherical surface, and the diameter of the spherical surface is d2, where d2 > d1; and / or, the protrusion 12 is a hemispherical structure; and / or, the depth of the mounting groove 1 is d3, where 7d1 / 10 ≤ d3 ≤ 17d1 / 20; and / or, a notch 11 is provided at the notch of the mounting groove 1; and / or, the diameter of the notch of the mounting groove 1 is d4, where d1 > d4; 7d1 / 10 ≤ d3 ≤ 17d1 / 20 can ensure that the ball will not fall off after being embedded in the mounting groove; it can also avoid the problem that the ball cannot be embedded; there is an interference fit between the ball and the notch of the mounting groove, so a notch 11 is provided at the notch of the mounting groove for easy installation. The protrusion 12 is a hemispherical structure, so that when moving, the contact between the ball 2 and the mounting groove 1 is between a point and a surface, which can effectively reduce the friction between the ball and the mounting groove; d1 > d4 can prevent the ball 2 from falling out of the mounting groove 1.

[0048] Further, the diameter of the protrusion 12 is d1 + d3 / 2d1.

[0049] Combined with reference to Figure 2 As shown, the present application also discloses some embodiments. A positioning rod 31 is provided on the mounting seat, and the extending direction of the positioning rod 31 is opposite to the notch direction of the mounting groove 1; a ring-shaped fixing member is sleeved on the positioning rod 31; a hook 32 is provided on the outer peripheral side of the ring-shaped fixing member.

[0050] Further, a first radially extending portion and a second radially extending portion are provided on the outer peripheral side of the ring-shaped fixing member. The hook 32 includes a first hook and a second hook. The first hook is provided on the first radially extending portion; the second hook is provided on the second radially extending portion.

[0051] Further, the first radially extending portion and the second radially extending portion are centrosymmetric about the central axis of the positioning rod 31, which can stably fix the caster assembly.

[0052] Combined with reference to Figure 3-4As shown, the present application also discloses some embodiments. The caster assembly further includes a first mounting portion 4; a first positioning hole 42 for cooperating with the positioning rod 31 is formed in the first mounting portion 4; and a bayonet 41 for cooperating with the hook 32 is further provided on the first mounting portion 4.

[0053] Further, the first mounting portion 4 is a long strip-shaped mounting plate.

[0054] According to an embodiment of the present application, a caster mounting structure includes a caster assembly, and the caster assembly is the above-mentioned caster assembly.

[0055] Combined with reference to Figure 5-7 As shown, the present application also discloses some embodiments. The caster mounting structure further includes a chassis assembly; a second mounting portion 5 is provided on the chassis assembly; when the caster assembly further includes the first mounting portion 4, the second mounting portion 5 is used to cooperate with the first mounting portion 4 to mount the caster assembly; and / or, the first mounting portion 4 is a long strip-shaped mounting plate.

[0056] Further, the second mounting portion 5 and the first mounting portion 4 are fixed by snap connection.

[0057] Further, the second mounting portion 5 includes a second positioning hole 51 and a fixing portion; the second positioning hole 51 is formed in the chassis assembly; when the caster assembly further includes the first positioning hole 42, the second positioning hole 51 corresponds to the first positioning hole 42; the fixing portion is provided on the chassis assembly, and the fixing portion is used to fix the first mounting portion 4;

[0058] And / or, a recessed groove is provided on the chassis assembly, and the second mounting portion 5 is arranged in the recessed groove, so that the entire caster assembly can be recessed inside the chassis, and only the moving part of the spherical wheel is exposed, which is beneficial to reducing the overall height of the machine. Under the same capacity, the volume of the machine is smaller, thereby achieving cost savings in the production materials of the machine, and facilitating the increase of the loading capacity of a single container when the machine is shipped.

[0059] Combined with reference to Figure 5 As shown, the present application also discloses some embodiments. The fixing portion includes an axial stop portion 53, a radial stop surface 55, a circumferential stop surface 56 and an elastic buckle 54; the radial stop surface 55 and the circumferential stop surface 56 are provided on the chassis assembly; the axial stop portion 53 is connected to both the radial stop surface 55 and the circumferential stop surface 56; the axial stop portion 53, the radial stop surface 55 and the circumferential stop surface 56 are all used to mount the first mounting portion 4; the elastic buckle 54 is connected to the radial stop surface 55; the elastic buckle 54 includes an elastic hook; and the elastic hook faces the chassis assembly; taking the elastic hook abutting against the chassis assembly as the first position, and taking the position of the elastic hook being the same as that of the axial stop portion 53 in the central axis direction of the positioning rod 31 as the second position; the elastic buckle 54 can elastically deform between the first position and the second position.

[0060] Furthermore, the fixing part includes a first fixing part and a second fixing part; both the first fixing part and the second fixing part are arranged on the chassis assembly; when the first mounting part 4 is a long strip-shaped mounting plate, the first fixing part is used to fix the first end of the first mounting part 4; the second fixing part is used to fix the second end of the first mounting part 4; and / or, the distance between the axial stop part 53 and the chassis assembly is a, and the thickness of the first mounting part 4 is b, where a = b; and / or, the distance between the abutting position of the elastic hook and the chassis assembly and the circumferential stop surface 56 is h1, and the width of the first mounting part 4 is h2; where h1 = h2.

[0061] Furthermore, the first fixing part and the second fixing part are centrosymmetric about the central axis of the second positioning hole 51;

[0062] Or, the second positioning hole 51 is symmetric about a first symmetry axis; the first symmetry axis is perpendicular to the central axis of the second positioning hole 51; the first fixing part, the second fixing part and the first symmetry axis are parallel to each other; and the first fixing part and the second fixing part are symmetric about the first symmetry axis.

[0063] Furthermore, taking the situation where both ends of the first mounting part 4 are circumferentially offset from the first fixing part and the second fixing part as the third position; taking the situation where the first end of the first mounting part 4 corresponds to the position of the first fixing part and the second end corresponds to the position of the second fixing part as the fourth position; the first mounting part 4 can rotate and move between the third position and the fourth position.

[0064] Furthermore, taking the situation where the first mounting part 4 is located at one end of the first fixing part and the second fixing part in the direction of the first symmetry axis as the fifth position; taking the situation where the first end of the first mounting part 4 corresponds to the position of the first fixing part and the second end corresponds to the position of the second fixing part as the sixth position; the first mounting part 4 can move between the fifth position and the sixth position; and / or, the shape of the second positioning hole 51 corresponds to the movement track of the positioning rod 31.

[0065] Furthermore, the second mounting part 5 further includes an avoidance groove 52; the avoidance groove 52 is opened on the chassis assembly and is located between the first fixing part and the second fixing part; the shape of the avoidance groove 52 corresponds to the movement track of the elastic hook.

[0066] According to an embodiment of the present application, a device includes a caster mounting structure, and the caster mounting structure is the above-mentioned caster mounting structure. The device can be a dehumidifier, an air conditioner, etc.

[0067] The specific installation process is as follows:

[0068] 1. Install the first mounting part 4 and the caster assembly: First, pass the positioning rod 31 through the first positioning hole 42, and cooperate the hook 32 with the bayonet 41 on the first mounting part 4 for snap connection;

[0069] 2. Install the overall structure after installing the first mounting part 4 and the caster assembly onto the second mounting part: When the first fixing part and the second fixing part are centrosymmetric about the center of the second positioning hole 51, then place the positioning rod 31 into the second positioning hole 51, and place the first mounting part 4 between the first fixing part and the second fixing part. With reference to Figure 8 and Figure 10 as shown, then rotate the first mounting part 4 around the positioning rod 31. During the rotation process, the hook 32 rotates in the avoidance groove 52 until both ends of the first mounting part 4 are fixed by the first fixing part and the second fixing part respectively, and the installation is completed. The fixed structure is as shown in Figure 9 and Figure 11-13 as shown.

[0070] Those skilled in the art can easily understand that, on the premise of no conflict, the above advantageous ways can be freely combined and superimposed.

[0071] The above are only the preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included within the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art of this technology, several improvements and variations can be made without departing from the technical principle of the present application, and these improvements and variations should also be regarded as within the protection scope of the present application.

Claims

1. A caster mounting structure, comprising a caster assembly, characterized in that, The caster assembly includes: A mounting seat, in which a mounting groove (1) is formed; a plurality of protrusions (12) are provided on the inner surface of the mounting groove (1); at least part of the tops of the protrusions (12) are located on the same curved surface; A ball (2), which is rotatably arranged in the mounting groove (1); The caster mounting structure further includes a chassis assembly; a second mounting portion (5) is provided on the chassis assembly, and the second mounting portion (5) includes a second positioning hole (51) and a fixing portion, the fixing portion is provided on the chassis assembly, and the fixing portion is used to fix the first mounting portion (4); A positioning rod (31) is provided on the mounting seat, and the extending direction of the positioning rod (31) is opposite to the notch direction of the mounting groove (1). The caster assembly further includes a first mounting portion (4), and a first positioning hole (42) for cooperating with the positioning rod (31) is formed on the first mounting portion (4). The second positioning hole (51) corresponds to the first positioning hole (42); an annular fixing member is sleeved on the positioning rod (31); a hook (32) is provided on the outer peripheral side of the annular fixing member; a bayonet (41) for cooperating with the hook (32) is further provided on the first mounting portion (4); The second mounting portion (5) is used to cooperate with the first mounting portion (4) to mount the caster assembly; the second mounting portion (5) and the first mounting portion (4) are fixed by clamping; The fixing portion includes an axial stop portion (53), a radial stop surface (55) and a circumferential stop surface (56), and the radial stop surface (55) and the circumferential stop surface (56) are provided on the chassis assembly; the axial stop portion (53) is connected to both the radial stop surface (55) and the circumferential stop surface (56); the axial stop portion (53), the radial stop surface (55) and the circumferential stop surface (56) are all used to mount the first mounting portion (4).

2. The caster mounting structure according to claim 1, characterized in that, The mounting groove (1) is a spherical groove; and / or, the ball (2) is a spherical ball.

3. The caster mounting structure according to claim 2, characterized in that, The diameter of the ball (2) is d1; the curved surface is a spherical surface, and the diameter of the spherical surface is d2, where d2>d1; and / or, the protrusion (12) is a hemispherical structure; and / or, the depth of the mounting groove (1) is d3, where 7d1 / 10≤d3≤17d1 / 20; and / or, a notch (11) is provided at the notch of the mounting groove (1); and / or, the diameter of the notch of the mounting groove (1) is d4, where d1>d4.

4. The caster mounting structure according to claim 3, characterized in that The diameter of the protrusion (12) is (d1 + d3) / 2d1.

5. The caster mounting structure according to claim 1, characterized in that, A first radially extending portion and a second radially extending portion are provided on the outer peripheral side of the annular fixing member; the hook (32) includes a first hook and a second hook, and the first hook is provided on the first radially extending portion; the second hook is provided on the second radially extending portion.

6. The caster mounting structure according to claim 1, wherein, The first mounting portion (4) is a long strip-shaped mounting plate.

7. The caster mounting structure according to claim 1, characterized in that, A recess is formed on the chassis assembly, and the second mounting portion (5) is provided in the recess.

8. The caster mounting structure according to claim 7, characterized in that, The fixing part further includes an elastic buckle (54); the elastic buckle (54) is connected to the radial stop surface (55); the elastic buckle (54) includes an elastic hook, and the elastic hook faces the chassis assembly; taking the contact between the elastic hook and the chassis assembly as the first position, and taking the position where the elastic hook and the axial stop part (53) are the same in the central axis direction of the positioning rod (31) as the second position; the elastic buckle (54) can undergo elastic deformation between the first position and the second position.

9. The caster mounting structure according to claim 8, wherein, The fixing part includes a first fixing part and a second fixing part; both the first fixing part and the second fixing part are arranged on the chassis assembly; when the first mounting part (4) is a long mounting plate, the first fixing part is used to fix the first end of the first mounting part (4); the second fixing part is used to fix the second end of the first mounting part (4); and / or, the distance between the axial stop part (53) and the chassis assembly is a, and the thickness of the first mounting part (4) is b, where a = b; and / or, the distance from the contact position between the elastic hook and the chassis assembly to the circumferential stop surface (56) is h1, and the width of the first mounting part (4) is h2; where h1 = h2.

10. The caster mounting structure according to claim 9, wherein, The first fixing part and the second fixing part are centrosymmetric about the central axis of the second positioning hole (51); Or, the second positioning hole (51) is symmetric about a first symmetry axis; the first symmetry axis is perpendicular to the central axis of the second positioning hole (51); the first fixing part, the second fixing part, and the first symmetry axis are parallel to each other; and the first fixing part and the second fixing part are symmetric about the first symmetry axis.

11. The caster mounting structure according to claim 10, characterized in that, Taking the situation where both ends of the first mounting part (4) are circumferentially offset from the first fixing part and the second fixing part as the third position; taking the situation where the first end of the first mounting part (4) corresponds to the position of the first fixing part and the second end corresponds to the position of the second fixing part as the fourth position; the first mounting part (4) can rotate and move between the third position and the fourth position.

12. The caster mounting structure according to claim 10, wherein, Taking the situation where the first mounting part (4) is located at one end of the first fixing part and the second fixing part in the direction of the first symmetry axis as the fifth position; taking the situation where the first end of the first mounting part (4) corresponds to the position of the first fixing part and the second end corresponds to the position of the second fixing part as the sixth position; the first mounting part (4) can move between the fifth position and the sixth position; and / or, the shape of the second positioning hole (51) corresponds to the movement track of the positioning rod (31).

13. The caster mounting structure according to any one of claims 11-12, characterized in that, The second mounting part (5) further includes an avoidance groove (52); the avoidance groove (52) is opened on the chassis assembly and is located between the first fixing part and the second fixing part; the shape of the avoidance groove (52) corresponds to the movement track of the elastic hook.

14. A device includes a caster mounting structure, characterized in that, The caster mounting structure is the caster mounting structure according to any one of claims 1-13.

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