Silent long-life universal wheel

Abstract

The utility model discloses a kind of universal wheel of mute long life, including fixed plate, mounting bracket and gyro wheel, fixed plate and mounting bracket are rotatably connected by two pieces of connecting piece, connecting piece clamps rotating ring, rotating ring is made of two half circular arc ring pieces clamping ball, ring piece material is bearing steel, high hardness after heat treatment, reduce rolling wear, and gap, sealing ring and lubricating grease are equipped between ring piece, reduce noise and dust contamination.Rivet groove is equipped at the end of bolt, fixed nut is fixed by riveting machine, prevent falling, bolt side surface is equipped with screw hole, screw rod is screwed, the limiting end head of screw rod and nut top surface limiting surface are pasted, limit nut reverse loosening, and prevent screw rod loosening by torsion bar, realize that universal wheel is mute and long life use.

Description

Technical Field

[0001] This utility model relates to the field of caster wheel technology, and in particular to a quiet, long-life caster wheel. Background Technology

[0002] In numerous fields such as logistics and transportation, furniture moving, and industrial equipment handling, casters play a crucial role as key moving components. However, the traditional design of casters has many drawbacks, severely impacting their performance and lifespan.

[0003] On the one hand, the rotating parts of traditional casters do not fit snugly enough. During rotation, the rotating parts cannot fit tightly with the related connecting structures, resulting in a large gap. This gap not only causes the caster to wobble noticeably during rotation, affecting the smoothness of movement, but also generates high-intensity noise. For example, in a quiet office environment, the noise generated by casters when furniture is moved can interfere with people's normal work; in medical settings where a quiet atmosphere is required, the noise from casters when equipment is moved may affect patients' rest and treatment.

[0004] On the other hand, traditional casters have poor wear resistance. Due to considerations regarding the materials, cost, and structural design of rotating components, wear between parts becomes severe during prolonged use. This not only shortens the lifespan of the casters and increases replacement costs, but also allows wear debris to enter the casters, further affecting their normal operation and even causing them to seize up and malfunction. Therefore, developing a quiet, long-life caster is of significant practical importance. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model proposes a quiet, long-life omnidirectional wheel. To achieve the above objectives, this utility model provides the following solution: A quiet, long-life omnidirectional wheel includes a fixed plate, a mounting frame, and a roller. The fixed plate is rotatably connected to the mounting frame, and the mounting frame is rotatably connected to the roller. A mounting hole is formed in the center of the fixed plate, and a connector is fixedly installed in the mounting hole. The fixed plate is rotatably connected to the mounting frame via the connector. Two connectors are provided, clamping the mounting frame and fixedly connected to it. Each connector includes a first clamping piece and a second clamping piece, with a rotating ring clamped between the first and second clamping pieces. The top end of the mounting frame is fixedly connected to the first and second clamping pieces respectively. Bolts pass through the first and second clamping pieces and the mounting frame, and a nut is screwed to one end of each bolt, with the nut abutting against the second clamping piece.

[0006] Preferably, the rotating ring includes a first ring plate and a second ring plate, the first ring plate and the second ring plate are semi-circular arc structures, and a plurality of balls are clamped and rolling between the first ring plate and the second ring plate; the first ring plate is in contact with the first clamping plate, and the second ring plate is in contact with the second clamping plate.

[0007] Preferably, the inner walls of the first ring plate and the second ring plate are respectively adapted to and fitted to the outer surface of the ball; a sealing ring is sleeved on the outer side of the first ring plate, and the sealing ring is made of PP material; a gap of 0.5mm-1mm is provided between the first ring plate and the second ring plate.

[0008] Preferably, one end face of the bolt has a cross-shaped rivet groove, and one end of the bolt is used to securely fasten the nut to one side of the second clamping piece by a riveting machine.

[0009] Preferably, a screw hole is provided on one side of the bolt, a screw rod is screwed into the screw hole, a torsion bar is fixedly connected to one end of the screw rod, and a limit end is fixedly connected to the other end of the screw rod, the limit end being disposed in contact with the top surface of the nut.

[0010] Preferably, the top surface of the nut is provided with a plurality of conical limiting surfaces, the side of the limiting end is a conical structure, and the side of the limiting end is detachably connected to the limiting surface.

[0011] Preferably, both the first and second ring plates are made of bearing steel, with a hardness of HRC60-64 after heat treatment; the balls are made of bearing steel, with a hardness of HRC61-66 after heat treatment.

[0012] Compared with the prior art, the present invention has the following advantages and technical effects: This invention utilizes a connector between the mounting frame and the fixed plate to enable relative rotation between them. This allows the rollers fixedly mounted on the mounting frame to rotate 360° around the fixed plate, facilitating the use of the caster. The connector clamps the ball bearings between a first ring and a second ring, increasing the contact and fit between the ball bearings and the first and second rings during rolling. Furthermore, the heat-treated rings provide excellent toughness and hardness, reducing the high noise and wear caused by insufficient fit in traditional structures, and improving the overall lifespan of the caster. Attached Figure Description

[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is an exploded structural diagram of the connector; Figure 3 This is a side view of the three-dimensional structure of the bolt and nut; Figure 4 This is a schematic diagram of the exploded structure of a bolt and nut. Figure 5 This is a side view of the three-dimensional structure of a bolt with a rivet groove.

[0014] The components include: 1. Fixing plate; 2. Mounting bracket; 3. Roller; 4. Mounting hole; 5. First clamping piece; 6. Second clamping piece; 7. Bolt; 8. Nut; 9. First ring piece; 10. Second ring piece; 11. Ball bearing; 12. Sealing ring; 13. Rivet groove; 14. Screw hole; 15. Screw; 16. Torsion bar; 17. Limiting end; 18. Limiting surface. Detailed Implementation

[0015] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0016] It should be noted that all components in the technical solution of this application require necessary additional facilities for water supply, oil supply, power supply, and gas supply for driving and / or control. Unless otherwise stated, they are assumed to be used and equipped with existing technology and no special explanation is required.

[0017] It should be noted that, in order to make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] It should be noted that the fixed connection described in this utility model is one of the following: threaded connection, welding, riveting, interference fit connection and bonding; detachable connection means that the two are closed to each other or can be separated at any time; sliding connection means that the two slide against each other or slide against each other and cannot be separated; rotating connection means that the two rotate against each other through bearings or bushings and cannot be separated.

[0019] Depend on Figure 1-5The diagram shows a quiet, long-life omnidirectional wheel, comprising a fixed plate 1, a mounting bracket 2, and a roller 3. The fixed plate 1 is rotatably connected to the mounting bracket 2, and the mounting bracket 2 is rotatably connected to the roller 3. The fixed plate 1 has a mounting hole 4 at its center, and a connector is fixedly installed in the mounting hole 4. The fixed plate 1 is rotatably connected to the mounting bracket 2 through the connector. Two connectors are provided, which clamp the mounting bracket 2 and are fixedly connected to it. The connector includes a first clamping piece 5 and a second clamping piece 6, with a rotating ring clamped between the first clamping piece 5 and the second clamping piece 6. The top of the mounting bracket 2 is fixedly connected to the first clamping piece 5 and the second clamping piece 6, respectively. Bolts 7 pass through the first clamping piece 5, the second clamping piece 6, and the mounting bracket 2, respectively. A nut 8 is screwed to one end of the bolt 7, and the nut 8 abuts against the second clamping piece 6.

[0020] The design is further optimized. The rotating ring includes a first ring plate 9 and a second ring plate 10, both of which are semi-circular arc structures. Several balls 11 are clamped and rolled between the first ring plate 9 and the second ring plate 10. The first ring plate 9 abuts against the first clamping plate 5, and the second ring plate 10 abuts against the second clamping plate 6. The inner walls of the first ring plate 9 and the second ring plate 10 are respectively adapted to and fitted to the outer surfaces of the balls 11. A sealing ring 12 made of PP material is fitted on the outer side of the first ring plate 9. The gap between the first ring plate 9 and the second ring plate 10 can compensate for the movement caused by the reduction in the distance between them and the balls 11 after wear. Naturally, the opposite sides of the first ring plate 9 and the second ring plate 10 are respectively provided with sliding grooves, and the grooves are coated with grease for the rolling friction between the balls 11 and the first ring plate 9 and the second ring plate 10, further reducing friction noise. Meanwhile, the sealing ring 12 is positioned between the first ring 9 and the second ring 10, and slides against them, sealing the gap between them and reducing dust accumulation in the external environment, thus extending the service life of the caster. A gap of 0.5mm-1mm is provided between the first ring 9 and the second ring 10. Both the first ring 9 and the second ring 10 are made of bearing steel, with a hardness of HRC60-64 after heat treatment; the ball bearing 11 is also made of bearing steel, with a hardness of HRC61-66 after heat treatment. The semi-circular arc structure of the first ring 9 and the second ring 10 matches the outer surface of the ball bearing 11, reducing its bounce during rolling and thus reducing rolling noise. Furthermore, the high-quality materials of the first ring 9 and the second ring 10 reduce rolling wear and extend the service life.

[0021] To further optimize the design, a cross-shaped rivet groove 13 is provided on one end face of the bolt 7, and the nut 8 is stably attached to one side of the second clamping piece 6 by a riveting machine.

[0022] Furthermore, the riveting machine can rivet one end of the bolt 7, which facilitates the fixing of the nut 8 after it is installed in place, preventing the nut 8 from falling off due to vibration during use of the caster wheel. The cross-shaped riveting groove 13 facilitates the compensation of plastic deformation at one end of the bolt 7 during the riveting process, avoiding excessive deformation of the bolt 7 and resulting in poor appearance quality.

[0023] In a further optimized design, a screw hole 14 is provided on one side of the bolt 7, and a screw rod 15 is screwed into the screw hole 14. A torsion bar 16 is fixedly connected to one end of the screw rod 15, and a limiting end 17 is fixedly connected to the other end of the screw rod 15. The limiting end 17 is positioned to abut against the top surface of the nut 8. Several conical limiting surfaces 18 are provided on the top surface of the nut 8, and the side of the limiting end 17 has a conical structure. The side of the limiting end 17 is detachably connected to the limiting surface 18.

[0024] Furthermore, after the screw 15 is screwed into place by the limiting end 17 until it fits into the limiting surface 18 on the top surface of the nut 8, the reverse loosening of the nut 8 is restricted, thus preventing the bolt 7 and the nut 8 from loosening and failing. It is also possible to twist the torsion bar 16 with tools such as pliers to make it abut against the side of the bolt 7, thus preventing the screw 15 from loosening, thereby preventing the bolt 7 and the nut 8 from loosening and failing.

[0025] The working process of this embodiment is as follows: This utility model includes a fixed plate 1, a mounting bracket 2, and rollers 3. A mounting hole 4 is formed in the center of the fixed plate 1, and a connector is fixedly installed in the mounting hole 4. Two connectors are stacked one on top of the other, clamping and fixing the mounting bracket 2 to achieve a rotatable connection between the fixed plate 1 and the mounting bracket 2. This allows the rollers 3, fixedly mounted on the mounting bracket 2, to rotate 360° around the fixed plate 1, facilitating the use of the casters.

[0026] The connector consists of a first clamping piece 5 and a second clamping piece 6, with a rotating ring clamped between them. The top of the mounting bracket 2 is fixedly connected to the first clamping piece 5 of the upper connector and the second clamping piece 6 of the lower connector, respectively. The first clamping piece 5, the second clamping piece 6 and the mounting bracket 2 are respectively provided with through holes, through which bolts 7 pass. One end of the bolt 7 is screwed with a nut 8, and the nut 8 is set to abut against the second clamping piece 6 of the lower connector.

[0027] The rotating ring includes a first ring plate 9 and a second ring plate 10, both with a semi-circular arc structure. Several balls 11 are clamped and rolled between them. The first ring plate 9 abuts against the first clamping plate 5, and the second ring plate 10 abuts against the second clamping plate 6. The inner walls of the first ring plate 9 and the second ring plate 10 are adapted to and fit against the outer surfaces of the balls 11, reducing ball bounce and rolling noise. A PP sealing ring 12 is fitted on the outer side of the first ring plate 9 to seal the gap between the first ring plate 9 and the second ring plate 10, reducing dust contamination. Grooves are formed on the opposite sides of the first ring plate 9 and the second ring plate 10 and lubricated with grease to reduce rolling friction noise between the balls 11 and the ring plates. A 0.5mm-1mm gap is provided between the first ring plate 9 and the second ring plate 10 to compensate for wear. Both ring plates are made of bearing steel with a hardness of HRC60-64 after heat treatment; the balls 11 are also made of bearing steel with a hardness of HRC61-66 after heat treatment, reducing rolling wear and increasing service life.

[0028] A cross-shaped rivet groove 13 is opened on one end face of the bolt 7. The nut 8 is stably clamped to one side of the second clamp 6 by the riveting machine. The riveting machine rivets one end of the bolt 7 to fix the position of the nut 8 and prevent it from falling off due to vibration. The cross-shaped rivet groove 13 compensates for the plastic deformation of the bolt 7.

[0029] An embodiment of the bolt 7 of this utility model: A screw hole 14 is opened on one side of the bolt 7, and a screw rod 15 is screwed into the screw hole 14. One end of the screw rod 15 is fixedly connected to a torsion bar 16, and the other end is fixedly connected to a limiting end 17. The screw rod 15 is screwed through the limiting end 17 until it fits against the limiting surface 18 on the top surface of the nut 8, preventing the nut 8 from turning back and loosening. The torsion bar 16 is twisted with pliers to make it abut against the side of the bolt 7 to prevent the screw rod 15 from loosening.

[0030] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A quiet, long-life omnidirectional wheel, comprising a fixed plate (1), a mounting bracket (2), and a roller (3), wherein the fixed plate (1) is rotatably connected to the mounting bracket (2), and the mounting bracket (2) is rotatably connected to the roller (3), characterized in that, The fixing plate (1) has a mounting hole (4) in the center. A connector is fixedly installed in the mounting hole (4). The fixing plate (1) is rotatably connected to the mounting frame (2) through the connector. There are two connectors. The two connectors clamp the mounting frame (2) and are fixedly connected to the mounting frame (2). The connector includes a first clamping piece (5) and a second clamping piece (6). A rotating ring is clamped between the first clamping piece (5) and the second clamping piece (6). The top of the mounting frame (2) is fixedly connected to the first clamping piece (5) and the second clamping piece (6) respectively. Bolts (7) pass through the first clamping piece (5), the second clamping piece (6) and the mounting frame (2) respectively. A nut (8) is screwed to one end of the bolt (7). The nut (8) abuts against the second clamping piece (6).

2. The silent, long-life caster wheel according to claim 1, characterized in that: The rotating ring includes a first ring piece (9) and a second ring piece (10). The first ring piece (9) and the second ring piece (10) are semi-circular arc structures. A plurality of balls (11) are clamped and rolling between the first ring piece (9) and the second ring piece (10). The first ring piece (9) is in contact with the first clamping piece (5), and the second ring piece (10) is in contact with the second clamping piece (6).

3. The silent, long-life caster wheel according to claim 2, characterized in that: The inner wall of the first ring piece (9) and the inner wall of the second ring piece (10) are respectively adapted to and fitted to the outer side of the ball (11); a sealing ring (12) is sleeved on the outer side of the first ring piece (9), and the sealing ring (12) is made of PP material; a gap of 0.5mm-1mm is provided between the first ring piece (9) and the second ring piece (10).

4. The silent, long-life caster wheel according to claim 1, characterized in that: One end face of the bolt (7) is provided with a cross-shaped rivet groove (13), and one end of the bolt (7) is used to securely fasten the nut (8) to one side of the second clamping piece (6) by a riveting machine.

5. The silent, long-life caster wheel according to claim 1, characterized in that: A screw hole (14) is provided on one side of the bolt (7), and a screw rod (15) is screwed into the screw hole (14). A torsion bar (16) is fixedly connected to one end of the screw rod (15), and a limit end (17) is fixedly connected to the other end of the screw rod (15). The limit end (17) is set to abut against the top surface of the nut (8).

6. The silent, long-life caster wheel according to claim 5, characterized in that: The nut (8) has several conical limiting surfaces (18) on its top surface. The side of the limiting end (17) is conical. The side of the limiting end (17) is detachably connected to the limiting surface (18).

7. The silent, long-life caster wheel according to claim 2, characterized in that: The first ring (9) and the second ring (10) are both bearing steel, and the hardness after heat treatment is HRC60-64; the ball (11) is bearing steel, and the hardness after heat treatment is HRC61-66.

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