Double-rotation shockproof double wheel

Abstract

The utility model relates to a kind of double-rotation shockproof double wheels, including upper plate, support assembly, wheel group, damping mechanism and eccentric disc;The support assembly includes first support and second support, the second support is nested in the first support and with its detachable fixed connection;The wheel group includes two wheels rotatably connected with the second support;The damping mechanism is arranged on the side of the second support away from the wheel group, and is detachably fixedly connected with the second support;The eccentric disc includes first disc body and second disc body, the first disc body is rotatably connected with the upper plate, and the second disc body is rotatably connected with the first disc body and the first support respectively.The utility model has the effect that shock-absorbing effect is good, bearing capacity is strong and steering is flexible.

Description

Technical Field

[0001] This utility model relates to the field of caster technology, and in particular to a double-rotating shockproof double wheel. Background Technology

[0002] In the field of industrial equipment and material handling, casters are crucial moving components, and their shock absorption performance and load-bearing capacity directly affect the stability and service life of equipment. Current technologies generally suffer from problems such as a single shock absorption structure, insufficient cushioning effect in complex environments, and a lack of flexible adjustment mechanisms for different load demands, making it difficult to simultaneously meet the dual requirements of high load-bearing capacity and high mobility. For example, when equipment travels on uneven surfaces, vibrations can easily cause parts to loosen, affecting equipment precision and even posing safety hazards. Furthermore, existing casters typically use fixed connection methods for their steering mechanisms, limiting steering flexibility, especially inconvenient for operation in confined spaces.

[0003] The existing technology has the following drawbacks: First, the shock absorption structure is simple, mostly using a single spring or rubber pad, which can only cope with single-frequency vibration. The buffering effect is insufficient in complex environments, and vibration can easily cause equipment parts to loosen. Second, the load-bearing capacity and mobility efficiency cannot be dynamically matched. The load-bearing capacity is fixedly bound to the walking speed, making it difficult to meet the requirements of high mobility and large load. Third, the steering mechanism mostly adopts a fixed connection method, which limits the steering flexibility, has high steering resistance, and is inconvenient to operate in narrow spaces. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a double-rotating shock-absorbing double wheel, which has the effects of good shock absorption, strong load-bearing capacity and flexible steering.

[0005] The above-mentioned utility model objective is achieved through the following technical solution: A double-rotating shock-absorbing double wheel includes an upper plate, a support assembly, a wheel set, a shock-absorbing mechanism, and an eccentric disc; The bracket assembly includes a first bracket and a second bracket, wherein the second bracket is nested within the first bracket and is detachably and fixedly connected to it. The wheel assembly includes two wheels that are rotatably connected to the second bracket; The shock absorption mechanism is located on the side of the second bracket facing away from the wheel assembly and is detachably and fixedly connected to the second bracket. The eccentric disc includes a first disc body and a second disc body. The first disc body is rotatably connected to the upper plate, and the second disc body is rotatably connected to the first disc body and the first support body, respectively.

[0006] Through the above technical solution, the double-rotation structure design gives it dual degrees of rotational freedom. The two discs of the eccentric plate are connected to the upper plate and the first bracket respectively. With the nested first and second brackets, the casters can turn flexibly on complex paths and can accurately control the direction of movement. The modular bracket components enhance the structural strength and improve the lateral load-bearing capacity. At the same time, the detachable design facilitates assembly and maintenance. The dual wheels with shock absorption mechanism can not only reduce wear on the ground, but also effectively filter ground vibrations to ensure the stable operation of the mounted equipment.

[0007] As a further technical solution of this utility model: the first support is an integrally formed U-shaped frame, which is composed of a first horizontal plate and first side plates extending from both sides thereon; The second support is a one-piece molded U-shaped frame, consisting of a second horizontal plate and second side plates extending from both sides thereon; The first side plate and the second side plate are connected by a cylindrical rod, and limit nuts are installed at both ends of the cylindrical rod.

[0008] Through the above technical solution, the first and second supports adopt an integrated U-shaped frame design. By inserting cylindrical rods and locking with limiting nuts, the integrated structure not only improves the bending and torsional strength of the supports to meet heavy load requirements, but also limits the lateral displacement of the supports through the precise positioning of the cylindrical rods, and prevents components from falling off with the help of limiting nuts. The modular U-shaped frame structure simplifies the processing flow, reduces manufacturing costs, and ensures the stability and reliability of the connection between the two supports.

[0009] As a further technical solution of this utility model: a first bearing is provided in the first disc body, and the first bearing is locked to the upper plate by a tightening nut; A bearing seat is provided below the second disc body, and a second bearing is embedded inside the bearing seat. The bearing seat is locked to the first bracket by a tightening nut.

[0010] Through the above technical solution, the first disc is connected to the upper plate through the first bearing, and the second disc is connected to the first bracket through the second bearing, so that the whole system forms a double rotation fulcrum. The upper plate can rotate around the axis of the first bearing to achieve the "first rotation", which corresponds to the main rotational motion of the eccentric wheel; the second disc can rotate around the axis of the second bearing to achieve the "second rotation", which corresponds to the adaptive angle adjustment during the shock absorption process.

[0011] As a further technical solution of this utility model: the shock absorption mechanism includes an elastic rod, a spring sleeved on the outer periphery of the elastic rod, and an elastic sleeve sleeved on the outer periphery of the spring.

[0012] Through the above technical solution, the vibration damping mechanism forms a multi-stage vibration damping system by using a concentric nested design of elastic rods, springs, and elastic sleeves. The elastic rods limit the radial deformation of the springs to avoid instability, while the elastic sleeves protect the springs and reduce wear. The concentric structure ensures that the damping force is transmitted evenly, improving the absorption capacity of the entire frequency band of vibrations on complex road surfaces and reducing equipment bumps.

[0013] As a further technical solution of this utility model: an upper pressure plate is provided between the two first side plates, a lower pressure plate is provided below the elastic sleeve, the elastic rod passes through the upper pressure plate, the second horizontal plate and the lower pressure plate in sequence, and limit nuts are installed at both ends of the elastic rod.

[0014] Through the above technical solution, the upper and lower pressure plates constrain the displacement direction of the shock absorption components to avoid eccentric loading; the elastic rod passes through the upper pressure plate and the second horizontal plate, and works with the lower pressure plate below the elastic sleeve to realize the axial limit and preload adjustment of the shock absorption mechanism (such as by compressing the spring with a nut), adapting to different load requirements.

[0015] As a further technical solution of this utility model: the wheel is an aluminum core polyurethane wheel, the wheel is rotatably connected to the second side plate through a shrink rod bolt, the shrink rod bolt is embedded in the bearing sleeve, and limit nuts are installed at both ends of the shrink rod bolt.

[0016] Through the above technical solutions, the aluminum core polyurethane wheel, combined with the design of the shrinking rod bolt and bearing sleeve, not only provides rigid support through the aluminum core and achieves wear resistance and shock absorption through the polyurethane outer layer, but also uses the bearing sleeve to reduce the direct friction between the wheel set and the bolt, thereby improving the smoothness of rotation; the shrinking rod bolt's diameter reduction design reduces stress concentration, and the limit nuts at both ends prevent it from falling off, ensuring the fatigue strength and installation stability of the wheel set under heavy loads.

[0017] In summary, this utility model has at least one of the following beneficial technical effects: 1. This utility model discloses a double-rotating shockproof double wheel, which achieves structural adjustability and convenient maintenance by setting a support assembly composed of a nested and detachably connected first support and a second support; achieves high-stability load-bearing through the rotational connection of the two wheels of the wheel set with the second support; achieves flexible replacement of shock-absorbing components and adjustment of buffer performance through the detachable connection of the shock-absorbing mechanism with the second support; and achieves flexible adjustment function of multi-dimensional steering of the caster by the double-rotating structure in which the first disc body of the eccentric plate is fixed to the upper plate and the second disc body is rotatably connected to the first disc body and the first support respectively.

[0018] 2. This utility model discloses a double-rotating anti-vibration double wheel, which achieves stable operation through a nested support assembly and an elastic damping mechanism. The U-shaped nested support structure enhances the lateral bearing capacity. Combined with a three-stage damping system consisting of an elastic rod, a spring, and an elastic sleeve, it can effectively filter more than 90% of ground vibrations. At the same time, the application of aluminum core polyurethane wheels further buffers vibrations, ensuring the stable operation of the equipment on uneven ground.

[0019] 3. This utility model discloses a double-rotating anti-vibration double wheel, which achieves efficient maintenance through a modular quick-installation structure: the design of the bearing seat and double tightening nuts reduces the steering torque of the caster while shortening the bearing replacement time; the connection method of the cylindrical rod, shrink rod bolt and limit nut of each component realizes the quick disassembly and assembly of the bracket assembly and wheel set, improving maintenance efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a first embodiment of the double-rotating shockproof double wheel of this utility model.

[0021] Figure 2 This is a rear view of a first embodiment of the double-rotating shockproof double wheel of this utility model.

[0022] Figure 3 This is a right view of a first embodiment of the present invention, which is a double-rotating shockproof double wheel.

[0023] Figure 4 This is a cross-sectional view of a first embodiment of the double-rotating shockproof double wheel of this utility model.

[0024] Figure 5 This is a cross-sectional view of the shock-absorbing mechanism of a double-rotating shock-absorbing double-wheel embodiment of the present invention.

[0025] Reference numerals: 1. Top plate; 2. Support assembly; 21. First support; 211. First horizontal plate; 212. First side plate; 22. Second support; 221. Second horizontal plate; 222. Second side plate; 3. Wheel set; 31. Wheel; 4. Shock absorption mechanism; 41. Elastic rod; 42. Spring; 43. Elastic sleeve; 5. Eccentric disc; 51. First disc body; 52. Second disc body; 6. Bearing seat; 7a. First bearing; 7b. Second bearing; 8. Upper tightening nut; 9. Lower tightening nut; 10. Upper pressure plate; 11. Lower pressure plate; 12. Retraction bolt. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Example

[0029] Reference Figure 1 , Figure 2 and Figure 3 The present invention discloses a double-rotating shockproof double wheel, which includes an upper plate 1, a support assembly 2, a wheel set 3, a shock absorption mechanism 4, and an eccentric disc 5. Each module is detachably or rigidly connected to form a functional integration, realizing a complete functional chain of equipment installation, load transmission, vibration buffering and flexible steering.

[0030] The upper plate 1, which serves as the central connection point for the equipment, can be made of steel plate with a thickness of 5-6mm. It is fixed to the bottom of the equipment by welding or M8-M12 bolts. There are four φ8.7mm mounting holes (hole spacing 85×75mm) pre-set below it, which serve as the only connection interface between the casters and the equipment.

[0031] Reference Figure 1The support assembly 2 is the core load-bearing structure, consisting of an integrally formed first support 21 and second support 22. Both are U-shaped frames with the same opening direction. The second support 22 is nested within the U-shaped groove of the first support 21 to form an adjustable rigid frame. The first support 21 is formed by bending a first horizontal plate 211 and two first side plates 212 on both sides. The second support 22 is correspondingly provided with a second horizontal plate 221 and a second side plate 222. The first side plates 212 and the second side plates 222 are horizontally connected by a φ10-φ12mm cylindrical rod. The two ends of the cylindrical rod are locked with M10-M12 limiting nuts, which not only restricts the lateral displacement of the second support 22, but also allows it to be finely adjusted by 5-10mm along the axial direction of the cylindrical rod to adapt to different vibration damping requirements.

[0032] Reference Figure 4 The wheelset 3 comprises two aluminum-core polyurethane wheels 31, using a combination of 6061 aluminum alloy hubs and 95 ShoreA polyurethane treads. The former provides rigid support, while the latter achieves wear resistance, shock absorption, and low-noise operation. Wheels 31 are rotatably connected to the second side plate 222 via reduced-length bolts 12. The diameter of the reduced-length section in the middle of the bolt is smaller than that of the threaded sections at both ends (e.g., φ8mm for an M10 bolt reduced-length section), and it is embedded in a self-lubricating copper alloy bearing sleeve. The outer ring of the sleeve is interference-fitted to the mounting hole on the side plate. The reduced-length section and the sleeve have a clearance fit to reduce friction. Limit nuts and spring washers at both ends of the bolt prevent axial detachment. The single wheel has a load-bearing capacity of 175-300KG.

[0033] Reference Figure 2 The shock absorption mechanism 4 is located on the side of the second bracket 22 facing away from the wheel set 3, forming a three-level composite buffer system: the elastic rod 41 vertically penetrates the bracket assembly 2, connects to the upper pressure plate 10 at its upper end, passes through the second horizontal plate 221, and is limited by the lower pressure plate 11; the spring 42 is sleeved on the outer periphery of the elastic rod to absorb high-frequency vibrations (such as road bumps); the elastic sleeve 43 (rubber or polyurethane material) is sleeved on the outside of the spring 42 to absorb low-frequency impacts (such as impacts from overpasses). The upper pressure plate 10 is fixed to the top of the first side plate 212 by M8 bolts. During installation, the spring can be pre-compressed by 5-10mm by nuts to form a linkage buffer effect of "spring compression - sleeve deformation", with a vibration absorption efficiency of 60%-80% across the entire frequency band.

[0034] Reference Figure 4The eccentric disc 5 includes a first disc body 51 and a second disc body 52. ​​The first disc body 51 is fixed to the upper plate 1, and the second disc body 52 is linked to the first support 21, forming a double-rotation core. A first bearing 7a is installed inside the first disc body 51, and the first bearing 7a is locked to the upper plate 1 by an upper clamping nut 8. A bearing seat 6 is installed below the second disc body 52, and a second bearing 7b is embedded inside the bearing seat 6. The bearing seat 6 is locked to the first support 21 by a lower clamping nut 9. The second disc body 52 is rotatably connected to the first support 21 through the second bearing 7b, converting the wheel impact into eccentric rotational motion. The first disc body 51 is connected to the upper plate 1 through the first bearing 7a and the upper clamping nut 8, and can actively rotate around the axis of the upper plate, achieving the "first rotation." The second disc body 52 is connected to the first support 21 through the second bearing 7b and the lower clamping nut 9, and can passively swing / rotate around the axis of the first support. Its motion is driven by ground impact or the eccentricity of the first disc body, achieving the "second rotation." The two discs achieve rotational degree of freedom separation through bearings, and the first and second rotations are coupled in space motion through eccentricity, converting linear impact force into rotational kinetic energy.

[0035] This utility model discloses an assembly process for a double-rotating shock-absorbing double wheel: The first disc 51 is fixed to the lower part of the upper plate 1 with the upper tightening nut 8; the second bracket 22 is nested into the first bracket 21, and the cylindrical rod 13 passes through the first side plate 212 and the second side plate 222 and is locked with the limiting nut; the wheel 31 is installed on the second side plate 222 by the shrinking rod bolt 12, and the two ends are fitted with limiting nuts; the second bearing 7b is pressed into the bearing seat 6 and fitted under the second disc 52, and the bearing seat 6 is locked and fixed to the first bracket 21 with the lower tightening nut 9; the elastic rod 41 of the shock absorption mechanism 4 passes through the upper pressure plate 10 and the second horizontal plate 221, and the lower pressure plate 11 fits the contour of the second disc 52.

[0036] Reference Figure 5 The load transmission path of the double-rotating shock-absorbing double wheel of this utility model is as follows: The load of the main body of the equipment first acts on the upper plate 1, and is transmitted to the first disc body 51 of the eccentric disk through the upper tightening nut 8. Guided by the second bearing 7b and the lower tightening nut 9, it is transmitted to the first support 21 by the second disc body 52 of the eccentric disk. Then, through the nested connection structure of the cylindrical rod and the limiting nut, the load is transmitted to the second support 22. At this time, the spring 42, elastic rod 41 and elastic sleeve 43 of the shock absorption mechanism 4 are simultaneously compressed by force. After buffering the vibration energy, the load is transmitted to the aluminum core polyurethane wheel 31 through the shrinking rod bolt 12 and the bearing sleeve. Finally, the load is released by the wheel 31 contacting the ground.

[0037] This utility model can also achieve modular maintenance. When the wheel 31 is worn or the shock-absorbing spring 42 fails, only the corresponding limit nut and connecting bolt need to be removed to replace the wheel set 3 or the shock-absorbing mechanism 4 independently, without having to disassemble the caster as a whole, thus improving maintenance efficiency.

[0038] The implementation principle of this utility model is as follows: through the three-dimensional collaborative mechanism of "double-support nesting of the first support 21 and the second support 22 + double rotation of the eccentric disk 5 + multi-level shock absorption of the shock absorption mechanism 4", the impact load of the traditional rigid wheel set is transformed into a composite shock absorption process of "rotational energy dissipation + elastic energy storage", which significantly improves the stability and comfort of the equipment on complex road surfaces. At the same time, the modular design realizes convenient maintenance and parameter adjustability, which has strong engineering practicality.

[0039] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A double-rotating shockproof double wheel, comprising an upper plate (1), characterized in that, It also includes a support assembly (2), a wheel set (3), a shock absorption mechanism (4), and an eccentric disc (5); The bracket assembly (2) includes a first bracket (21) and a second bracket (22), wherein the second bracket (22) is nested inside the first bracket (21) and is detachably and fixedly connected to it; The wheel assembly (3) includes two wheels (31) that are rotatably connected to the second bracket (22); The shock absorption mechanism (4) is located on the side of the second bracket (22) away from the wheel set (3) and is detachably and fixedly connected to the second bracket (22); The eccentric disc (5) includes a first disc body (51) and a second disc body (52). The first disc body (51) is rotatably connected to the upper plate (1), and the second disc body (52) is rotatably connected to the first disc body (51) and the first bracket (21) respectively.

2. The double-rotating shock-absorbing double wheel according to claim 1, characterized in that, The first support (21) is an integrally formed U-shaped frame, consisting of a first horizontal plate (211) and first side plates (212) extending from both sides thereon; The second support (22) is an integrally formed U-shaped frame, consisting of a second horizontal plate (221) and second side plates (222) extending from both sides thereon; The first side plate (212) and the second side plate (222) are connected by a cylindrical rod (13), and both ends of the cylindrical rod (13) are equipped with limit nuts.

3. The double-rotating shock-absorbing double wheel according to claim 1, characterized in that, The first bearing (7a) is provided inside the first disc body (51), and the first bearing (7a) is locked to the upper plate (1) by the upper tightening nut (8); A bearing seat (6) is provided below the second disc body (52), and a second bearing (7b) is embedded inside the bearing seat (6). The bearing seat (6) is locked and fixed to the first bracket (21) by a lower tightening nut (9).

4. The double-rotating shock-absorbing double wheel according to claim 2, characterized in that, The shock absorption mechanism (4) includes an elastic rod (41), a spring (42) sleeved on the outer periphery of the elastic rod (41), and an elastic sleeve (43) sleeved on the outer periphery of the spring (42).

5. The double-rotating shock-absorbing double wheel according to claim 4, characterized in that, An upper pressure plate (10) is provided between the two first side plates (212) above, and a lower pressure plate (11) is provided below the elastic sleeve (43). The elastic rod (41) passes through the upper pressure plate (10), the second horizontal plate (221) and the lower pressure plate (11) in sequence. Limiting nuts are installed at both ends of the elastic rod (41).

6. The double-rotating shock-absorbing double wheel according to claim 2, characterized in that, The wheel is an aluminum core polyurethane wheel. The wheel (31) is rotatably connected to the second side plate (222) by a shrink bolt (12). The shrink bolt (12) is embedded in the bearing sleeve. Both ends of the shrink bolt (12) are equipped with limit nuts.

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