Empty neck universal double wheel

Abstract

The utility model relates to a kind of empty neck universal double wheels, including support, wheel group, first bearing, fixed assembly;The support includes horizontal plate and two vertical boards, and the horizontal plate is provided with a hollow slot;The wheel group includes two wheel bodies arranged side by side, and two The wheel body top is embedded in the hollow slot and is fixedly connected with two vertical boards;The first bearing is arranged outside the horizontal plate;The fixed assembly is arranged in the circumferential of the first bearing outside, and the fixed assembly is used to constrain the first bearing fixedly.The utility model has the effects of adapting ultra-low chassis, stable structure and flexible steering.

Description

Technical Field

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

[0002] As a type of mobile component that can flexibly steer, casters are widely used in equipment that needs to frequently change the direction of movement. In ultra-low chassis scenarios such as AGVs and parking equipment, the rationality of their structure and the stability of their operation directly determine the overall performance of the equipment. Such scenarios place stringent requirements on the high compressibility, rotational stability and structural reliability of casters.

[0003] In the existing technology, the connection structure between the wheel body and the bracket of the caster wheel results in an overall axial dimension that is too large, making it difficult to adapt to the space constraints of ultra-low chassis. At the same time, the bearing constraint method is simple, and it is only fixed by a single baffle or snap-fit. This makes it easy for axial movement or radial wobble to occur during equipment operation, affecting the smoothness of steering. As a result, the existing caster wheel cannot meet the stringent requirements of ultra-low chassis equipment. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a hollow-neck universal double wheel, which has the effects of adapting to ultra-low chassis, structural stability and flexible steering.

[0005] The above-mentioned utility model objective is achieved through the following technical solution:

[0006] A hollow-neck omnidirectional double wheel includes a bracket, a wheel assembly, a first bearing, and a fixing component;

[0007] The bracket includes a horizontal plate and two vertical plates, and the horizontal plate has a hollowed-out groove.

[0008] The wheel assembly includes two wheels arranged side by side, with the tops of the two wheels embedded in the hollowed-out groove and fixedly connected to the two vertical plates;

[0009] The first bearing is located on the outside of the cross plate;

[0010] The fixing component is disposed around the outer circumference of the first bearing, and the fixing component is used to constrain and fix the first bearing.

[0011] The above technical solution, which adopts a support structure consisting of horizontal plates and double vertical plates, combined with the design of embedding hollow grooves on the top of the wheel body, significantly reduces the overall height of the omnidirectional wheel, making it suitable for space constraints in low-chassis scenarios such as AGVs and parking equipment. At the same time, the first bearing is externally mounted and constrained circumferentially by a fixing component, which enhances the structural stability while ensuring the flexibility of omnidirectional rotation, achieving comprehensive performance of "low height, high flexibility, and strong load-bearing capacity" in low-chassis environments.

[0012] As a further technical solution of this utility model: the fixing component includes an upper baffle, an upper top plate, and a lower baffle;

[0013] The upper baffle abuts against the upper surface of the inner ring of the first bearing and is fixedly connected to the horizontal plate;

[0014] The top annular surface of the upper plate abuts against the upper surface of the outer ring of the first bearing, and the annular sidewall of the upper plate abuts against the side surface of the outer ring of the first bearing.

[0015] The lower baffle abuts against the lower surface of the outer ring of the first bearing and is fixedly connected to the upper plate.

[0016] Through the above technical solution, the upper baffle, upper plate and lower baffle of the fixing component form multi-dimensional constraints from the upper surface of the inner ring of the first bearing, the upper and lower surfaces of the outer ring and the side, respectively, which accurately restricts the axial movement and radial runout of the bearing, improves the rotation accuracy and structural rigidity of the caster wheel in the low chassis scenario, and avoids operation failures caused by bearing loosening.

[0017] As a further technical solution of this utility model: the two wheels are coaxially sleeved on the outside of the middle tube through the second bearing, and the middle tube is fixedly connected to the vertical plates on both sides by tightening screws.

[0018] Through the above technical solution, the two wheels are coaxially sleeved on the outside of the middle tube by the second bearing, and fixedly connected with the vertical plate by the tightening screw, so as to realize the synchronous rotation of the wheels and strengthen the integrated structure of the wheel set and the bracket. In low chassis equipment such as AGV and parking, it not only ensures the consistency of steering, but also improves the load-bearing capacity of the wheel set and the uniformity of ground force, and adapts to the needs of high-frequency movement.

[0019] As a further technical solution of this utility model: limit nuts are installed at both ends of the tightening screw.

[0020] By using the above technical solution, limiting nuts are set at both ends of the tightening screw to form a two-way anti-loosening structure, which can resist the high-frequency vibration during the operation of AGV and parking equipment, prevent the connection between the middle tube and the vertical plate from loosening, and ensure the long-term stable operation of the casters in low chassis scenarios, thus reducing the maintenance frequency.

[0021] In summary, this utility model has at least one of the following beneficial technical effects:

[0022] 1. This utility model discloses a hollow-neck universal double wheel, which achieves an overall reduction in the height of the universal wheel to adapt to low-chassis scenarios such as AGVs and parking equipment through the support structure of horizontal plate and double vertical plate, the integrated design of hollow groove embedded in the top of the wheel body, and the external constraint of the first bearing, while taking into account the rotation flexibility and structural stability.

[0023] 2. This utility model discloses a hollow-neck universal double wheel, which achieves precise suppression of axial movement and radial runout of the bearing by multi-dimensional layered constraint of the upper baffle, upper plate and lower baffle of the fixed component, thereby improving the structural rigidity of the low chassis equipment during operation.

[0024] 3. This utility model discloses a hollow-neck universal double wheel, which uses a wheel assembly design that uses a second bearing to coaxially sleeve the wheel body, the central tube and the tightening screw to rigidly connect the wheel assembly, so as to realize the synchronous rotation of the double wheel body and strengthen the integrated structure of the wheel assembly and the bracket, thereby improving the load-bearing capacity and steering consistency of the universal wheel in low chassis scenarios. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the overall structure of a hollow-neck universal double wheel according to the present invention.

[0026] Figure 2 This is a side view of a hollow-neck universal double wheel according to the present invention.

[0027] Figure 3 This is a bottom view of a hollow-neck universal double wheel according to the present invention.

[0028] Figure 4 This is a cross-sectional view of a hollow-neck universal double wheel according to the present invention.

[0029] Reference numerals: 1. Bracket; 11. Horizontal plate; 111. Hollowed-out groove; 2. Vertical plate; 2. Wheel set; 21. Wheel body; 3. First bearing; 4. Fixing component; 5. Upper baffle; 6. Upper plate; 7. Lower baffle; 8. Second bearing; 9. Middle tube; 10. Tightening screw; 13. Limit nut. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Reference Figure 1 and Figure 4 The present invention discloses a hollow-neck universal double wheel, which includes a bracket 1, a wheel set 2, a first bearing 3, and a fixing component 4.

[0034] Reference Figure 1 , Figure 2 and Figure 3 The bracket 1 includes a horizontal plate 11 and two vertical plates 12 fixedly connected to the lower surface of the horizontal plate 11. A hollow groove 111, matching the top contour of the wheel body 21, is formed in the middle of the horizontal plate 11. The wheel set 2 includes two wheel bodies 21 arranged side-by-side, and the wheel bodies 21 are made of aluminum-core polyurethane wheels. (Refer to...) Figure 1 and Figure 2 After the top of the two wheel bodies 21 is directly embedded into the hollow groove 111, the two wheel bodies 21 are fixedly connected to the two vertical plates 12. The longitudinal height of the universal wheel is directly compressed through the embedded connection of the wheel bodies 21, which is suitable for low chassis scenarios.

[0035] Reference Figure 4 The first bearing 3 is embedded on the outside of the horizontal plate 11. The upper baffle 5 of the fixing component 4 is a ring structure. The lower surface of the upper baffle 5 is in contact with the upper surface of the inner ring of the first bearing 3. The upper baffle 5 is fixed to the horizontal plate 11 by screws to restrict the inner ring of the first bearing 3 from moving upward along the axial direction. The upper plate 6 is a stepped ring. Its top ring surface abuts against the upper surface of the outer ring of the first bearing 3. The outer ring sidewall is tightly attached to the side of the outer ring of the bearing, forming a double constraint of radial wrapping and axial support. The lower baffle 7 is a ring structure. After abutting against the lower surface of the outer ring of the first bearing 3, it is fixed to the upper plate 6 by screws, thus constructing a three-dimensional constraint system of "upper pressure + side wrapping + lower support" for the outer ring of the first bearing 3.

[0036] Reference Figure 1 , Figure 2 and Figure 4The two wheels 21 of the wheel set 2 are arranged symmetrically and are coaxially sleeved on the outside of the middle tube 9 through the second bearing 8. The middle tube 9 is connected to the two vertical plates 12. After the tightening screw 10 passes through one side of the vertical plate 12, the middle tube 9 and the other side of the vertical plate 12 in sequence, the two ends of the tightening screw 10 are screwed with the limit nuts 13 to achieve rigid locking. The anti-loosening structure of the double limit nuts 13 axially interlocks to achieve rigid locking of the middle tube 9 and the vertical plate 12, so that the two wheels 21 rotate synchronously around the same axis, which not only ensures the uniformity of the ground force, but also resists the high-frequency vibration during the operation of the equipment and prevents the connection from loosening.

[0037] The implementation principle of this utility model is as follows: through the embedded structural design of the bracket 1 and the wheel set 2, the multi-dimensional constraint and fixation of the first bearing 3, the synchronous rotation configuration of the double wheel bodies 21, and the anti-loosening treatment of the connection parts, the components work together to achieve stable operation in low-chassis scenarios. Specifically, the top of the wheel body 21 of the wheel set 2 is embedded in the hollow groove 111 of the horizontal plate 11, and the wheel body 21 is fastened to the vertical plate 12 with threads to form an embedded connection between the wheel body 21 and the bracket 1, so that the upper structure of the wheel body 21 is closely fitted with the lower surface of the horizontal plate 11, eliminating the extra installation height of the traditional external wheel set 2 and adapting to the space limitations of low-chassis scenarios; the first bearing 3 is constrained by the layered structure of the fixing component 4—the upper baffle 5 axially locks the inner ring, the upper plate 6 radially wraps the outer ring and assists in axial limiting, and the lower baffle 7 axially supports the bottom of the outer ring, forming a multi-dimensional constraint system. The first bearing 3 is effectively limited to axial movement and radial wobble during the turning process, ensuring rotational stability. The double wheel body 21 is coaxially sleeved with the middle tube 9 through the second bearing 8, and is rigidly connected to the vertical plate 12 with the tightening screw 10 to form a double wheel synchronous rotation structure, ensuring that the double wheels rotate in unison and that the ground force is evenly distributed. The limit nut 13 adopts a double nut anti-loosening structure, which can maintain a stable preload in high-frequency vibration environment, prevent the connection from loosening, ensure long-term reliable operation, and ultimately achieve the effect of low height adaptation, stable rotation and long-term reliable use of the caster wheel in the low chassis scenario.

[0038] 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 hollow-neck universal double wheel, characterized in that, Includes a bracket (1), a wheel set (2), a first bearing (3), and a fixing assembly (4); The bracket (1) includes a horizontal plate (11) and two vertical plates (12), and the horizontal plate (11) has a hollowed-out groove (111); The wheel assembly (2) includes two wheel bodies (21) arranged side by side, the tops of the two wheel bodies (21) are embedded in the hollow groove (111) and fixedly connected to the two vertical plates (12); The first bearing (3) is disposed on the outside of the cross plate (11); The fixing component (4) is disposed around the outer circumference of the first bearing (3), and the fixing component (4) is used to constrain and fix the first bearing (3).

2. The hollow-neck universal double wheel according to claim 1, characterized in that, The fixing component (4) includes an upper baffle (5), an upper plate (6), and a lower baffle (7); The upper baffle (5) abuts against the upper surface of the inner ring of the first bearing (3) and is fixedly connected to the horizontal plate (11); The top annular surface of the upper plate (6) abuts against the upper surface of the outer ring of the first bearing (3), and the annular side wall surface of the upper plate (6) abuts against the side surface of the outer ring of the first bearing (3); The lower baffle (7) abuts against the lower surface of the outer ring of the first bearing (3) and is fixedly connected to the upper plate (6).

3. The hollow-neck universal double wheel according to claim 1, characterized in that, The two wheels (21) are coaxially sleeved on the outside of the middle tube (9) via the second bearing (8), and the middle tube (9) is fixedly connected to the vertical plates (12) on both sides via tightening screws (10).

4. A hollow-neck universal double wheel according to claim 3, characterized in that, Limit nuts (13) are installed at both ends of the tightening screw (10).

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