Trundle with single screw and panel fixing structure

Abstract

The utility model discloses a trundle and panel fixing structure using a single screw, which comprises a roller carrier, a screw rod and a panel, the first bearing disc and the second bearing disc are arranged at the bottom and the top of the mounting ring, and the balls are located in ball cavities formed by splicing the mounting ring, the first bearing disc and the second bearing disc. The positioning suite is embedded in the roller carrier and the ball assembly, a counterbore is formed in the positioning suite, an annular clamping groove is formed in the outer side of the positioning suite, and the inner side of the ball assembly is clamped in the annular clamping groove; and the screw is arranged in the counterbore of the positioning sleeve piece and the mounting hole of the panel in a penetrating manner and is screwed and positioned, and a groove is formed in the top surface of the panel. The mounting structure can solve the problems that a common mounting structure for the trundle and the top cart panel is complex in assembling operation, long in consumed time, low in efficiency and inconvenient to assemble in mass production, and the universal design of the mounting structure enables the trundle and the panel to be connected only through a rotating shaft, so that the structural stability and strength are not high.

Description

Technical Field

[0001] The utility model relates to the technical field of casters, in particular to a caster and panel fixing structure using a single screw. Background Art

[0002] Common casters and top trolley panels are usually installed using a central pivot rotation connection and edge screws to fix the casters. There are many parts, and the caster assembly operation is complicated, time-consuming, and inefficient, which is not convenient for mass production assembly. In addition, the universal design of common casters means that the caster and the panel are only connected by a rotating shaft, and the structural stability and strength are not high. Utility Model Content

[0003] The purpose of the utility model is to provide a caster and panel fixing structure using a single screw in order to solve the problems that the common installation of casters and top cart panels mostly adopts a central rotating shaft rotation connection and edge screws to fix the casters, which has many parts, complicated caster assembly operation, long time consumption, low efficiency, and is not convenient for mass production assembly. In addition, the universal design of common casters makes the caster and the panel connected only by a rotating shaft, which has low structural stability and strength.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a caster and panel fixing structure using a single screw, comprising:

[0005] A roller frame, with a mounting ring provided on the top;

[0006] The ball assembly includes a first bearing disc provided at the bottom of the mounting ring, a second bearing disc provided at the top of the mounting ring, and balls provided between the mounting ring and the first and second bearing discs, wherein a ball cavity for movement of the balls is formed between the mounting ring and the first and second bearing discs;

[0007] A positioning kit is embedded in the roller frame and the ball assembly, with a countersunk hole provided inside and an annular groove provided outside, and the inner side of the ball assembly is clamped in the annular groove;

[0008] The screws are inserted into the countersunk holes of the positioning kit and the mounting holes of the panel and are screwed for positioning. A groove is provided on the top surface of the panel.

[0009] As a further description of the above technical solution:

[0010] The outer side of the mounting ring and the second bearing disc is sleeved with a limiting outer ring with a T-shaped cross section.

[0011] As a further description of the above technical solution:

[0012] A mounting plate is assembled on the top of the second bearing plate, and the mounting plate is embedded in a mounting groove at the bottom of the panel.

[0013] As a further description of the above technical solution:

[0014] The middle part of the mounting plate is concave, and is inserted into the annular groove together with the ball assembly. A limiting flange is provided on the outer side of the annular groove, and the limiting flange abuts against the outer side of the mounting plate.

[0015] As a further description of the above technical solution:

[0016] A nut is threaded onto the screw, and the nut on the screw is respectively arranged in the groove and the countersunk hole. The nut or nut on the screw is inserted into the countersunk hole for circumferential limitation, and a washer is arranged on the inner side of the nut.

[0017] As a further description of the above technical solution:

[0018] Screw threads are arranged in the countersunk hole and the mounting hole.

[0019] In summary, due to the adoption of the above technical solution, the present invention has the following advantages compared with the prior art:

[0020] Beneficial effects:

[0021] The utility model can realize the assembly of the roller frame, ball assembly and panel by using a single screw and positioning kit in combination with nuts and countersunk holes for circumferential positioning or by directly screwing with the countersunk holes and mounting holes at the connection, thereby improving the convenience of caster assembly; the ball assembly is embedded in the upper and lower end surfaces of the roller frame and the panel to ensure the universal adjustment of the caster while performing the associated installation of the caster and the panel, thereby improving the structural stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 The figure is a structural diagram of a caster and panel fixing structure using a single screw, and an assembly method 1 in a certain embodiment.

[0024] Figure 2 This is a front cross-sectional view of an embodiment of a caster and panel fixing structure using a single screw, and an assembly method 1.

[0025] Figure 3The figure is a structural diagram of an embodiment of a caster and panel fixing structure using a single screw and a second assembly method.

[0026] Figure 4 This is a front cross-sectional view of an embodiment of a caster and panel fixing structure using a single screw, and a second assembly method.

[0027] Figure 5 The figure is a front cross-sectional view of another embodiment of a caster and panel fixing structure using a single screw.

[0028] Figure 6 This is a front cross-sectional view of an embodiment of a caster and panel fixing structure using a single screw, and an assembly method three.

[0029] Legend:

[0030] 1. Roller frame; 11. Mounting ring; 12. Washer; 2. First bearing plate; 3. Second bearing plate; 4. Ball; 5. Limit outer ring; 6. Mounting plate; 7. Positioning kit; 71. Annular slot; 72. Limit flange; 73. Countersunk hole; 74. Thread; 8. Panel; 81. Mounting hole; 82. Groove; 83. Mounting slot; 9. Screw; 10. Nut. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0033] See also Figure 1-6 The utility model provides a technical solution: a caster and panel fixing structure using a single screw, comprising:

[0034] The roller frame 1 has a mounting ring 11 on its top;

[0035] The ball assembly includes a first bearing disc 2 provided at the bottom of the mounting ring 11, a second bearing disc 3 located at the top of the mounting ring 11, and a ball 4 located between the mounting ring 11 and the first bearing disc 2 and the second bearing disc 3. The mounting ring 11 and the first bearing disc 2 and the second bearing disc 3 form a ball cavity for the movement of the ball 4.

[0036] The positioning kit 7 is embedded in the roller frame 1 and the ball assembly, with a countersunk hole 73 provided inside and an annular groove 71 provided outside. The inner side of the ball assembly is clamped in the annular groove 71;

[0037] The screw 9 is inserted into the countersunk hole 73 of the positioning kit 7 and the mounting hole 81 of the panel 8 for screwing and positioning. The top surface of the panel 8 is provided with a groove 82. In this embodiment, the positioning kit 7 and the screw 9 are rivets to ensure the strength of the connection structure and the stability of the assembly with the caster component.

[0038] In order to further improve the assembly stability of the ball assembly, the end caster component roller frame 1 and the panel 8, the mounting ring 11 and the outer side of the second bearing disc 3 are sleeved with a T-shaped cross-section limiting outer ring 5.

[0039] A mounting plate 6 is assembled on the top of the second bearing plate 3 , and the mounting plate 6 is embedded in a mounting groove 83 at the bottom of the panel 8 .

[0040] The center of the mounting plate 6 is concave and is inserted into the annular slot 71 together with the ball assembly. A limiting flange 72 is provided on the outside of the annular slot 71, and the limiting flange 72 abuts against the outside of the mounting plate 6. The structure composed of the roller frame 1, the ball assembly, and the mounting plate 6 can rotate internally.

[0041] In one embodiment, a nut 10 is threaded onto the screw 9. The nut 10 on the screw 9 is disposed within the groove 82 and the countersunk hole 73, respectively. The nut 10 on the screw 9 is inserted into the countersunk hole 73 for circumferential positioning. In this embodiment, the nut 10 on the screw 9 and the nut 10, as well as the connection between them and the countersunk hole 73, are all hexagonal columnar structures.

[0042] During assembly, the prefabricated component consisting of the roller frame 1, ball assembly, and positioning kit 7 is placed against the bottom of the panel 8, and the screw 9 is inserted from bottom to top into the countersunk hole 73 and the mounting hole 81, so that the nut of the screw 9 is positioned in the countersunk hole 73, and the nut 10 is screwed onto the screw 9. This is the first assembly method. Figure 1 、 2 As shown; press the nut 10 into the countersunk hole 73, and then insert the screw 9 from bottom to top into the countersunk hole 73, the mounting hole 81, and screw it with the nut 10, the structure is finalized, this is the second assembly method, such as Figure 3 、4 As shown; the washer 12 is provided inside the nut 10, which is the assembly method three, as Figure 6 shown.

[0043] In another embodiment, screw threads 74 are provided in the countersunk hole 73 and the mounting hole 81 so that the positioning of the screw 9 does not need to be used in conjunction with the nut 10 and can be achieved through the above-mentioned structural screw connection, thereby improving the structural assembly stability.

[0044] In summary, due to the adoption of the above technical solution, the caster and panel fixing structure using a single screw in this embodiment has the following beneficial effects compared to the prior art:

[0045] The utility model can realize the assembly of the roller frame, ball assembly and panel by using a single screw and positioning kit in combination with nuts and countersunk holes for circumferential positioning or by directly screwing with the countersunk holes and mounting holes at the connection, thereby improving the convenience of caster assembly; the ball assembly is embedded in the upper and lower end surfaces of the roller frame and the panel to ensure the universal adjustment of the caster while performing the associated installation of the caster and the panel, thereby improving the structural stability.

[0046] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A caster and panel fixing structure using a single screw, characterized in that: include: A roller frame, with a mounting ring provided on the top; The ball assembly includes a first bearing disc provided at the bottom of the mounting ring, a second bearing disc provided at the top of the mounting ring, and balls provided between the mounting ring and the first and second bearing discs, wherein a ball cavity for movement of the balls is formed between the mounting ring and the first and second bearing discs; A positioning kit is embedded in the roller frame and the ball assembly, with a countersunk hole provided inside and an annular groove provided outside, and the inner side of the ball assembly is clamped in the annular groove; The screws are inserted into the countersunk holes of the positioning kit and the mounting holes of the panel and are screwed for positioning. A groove is provided on the top surface of the panel.

2. A caster and panel fixing structure using a single screw according to claim 1, characterized in that: The outer side of the mounting ring and the second bearing disc is sleeved with a limiting outer ring with a T-shaped cross section.

3. The caster and panel fixing structure using a single screw according to claim 1, characterized in that: A mounting plate is assembled on the top of the second bearing plate, and the mounting plate is embedded in a mounting groove at the bottom of the panel.

4. The caster and panel fixing structure using a single screw according to claim 3, characterized in that: The middle part of the mounting plate is concave, and is inserted into the annular groove together with the ball assembly. A limiting flange is provided on the outer side of the annular groove, and the limiting flange abuts against the outer side of the mounting plate.

5. The caster and panel fixing structure using a single screw according to claim 1, characterized in that: A nut is threaded onto the screw, and the nut on the screw is respectively arranged in the groove and the countersunk hole. The nut or nut on the screw is inserted into the countersunk hole for circumferential limitation, and a washer is arranged on the inner side of the nut.

6. The caster and panel fixing structure using a single screw according to claim 1, characterized in that: Screw threads are arranged in the countersunk hole and the mounting hole.

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