Universal wheel with embedded brake

Abstract

The utility model relates to an embedded brake universal wheel which comprises a main sleeve, an inner sleeve seat, two rotating wheels, a semi-locking piece and an unlocking piece. The main sleeve is of a cylindrical structure with an opening in the lower end, and the inner cylinder seat is coaxially arranged in the main sleeve and rotatably arranged in the main sleeve; a rotating shaft is arranged at the bottom of the inner cylinder seat, and the two rotating wheels are rotationally arranged at the two ends of the rotating shaft in a sleeving manner; the semi-locking piece is rotatably arranged in the inner cylinder seat, one end of the semi-locking piece is a semi-locking part, the other end of the semi-locking piece is an unlocking part, the top of the semi-locking part abuts against the inner cylinder seat through a spring, and the bottom of the semi-locking part is movably locked with one rotating wheel; the unlocking piece can be movably arranged on the main sleeve in the axial direction of the main sleeve, and the unlocking piece is in transmission connection with the unlocking part. The embedded brake universal wheel disclosed by the utility model is stable in structure, not easy to shake when in use, and wide in application range.

Description

Technical Field

[0001] This utility model relates to the field of caster wheel technology, and in particular to an embedded brake caster wheel. Background Technology

[0002] Casters are a type of movable caster whose structure allows for 360-degree horizontal rotation. Traditional casters generally have various drawbacks. For example, the swivel structure of common casters is typically formed using a stamping process. While this results in a simple and inexpensive structure, it also has a short lifespan, and the rotating and stationary parts are prone to wobbling during use. Furthermore, traditional casters require large ball joints to limit their axial movement, leading to limited applicability and a narrow range of applications. Utility Model Content

[0003] Based on this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide an embedded brake universal wheel with a stable structure, which is not easy to shake during use and has a wide range of applications.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An embedded brake caster includes a main sleeve, an inner sleeve base, two rotating wheels, a semi-locking component, and an unlocking component. The main sleeve is a cylindrical structure with an open lower end. The inner sleeve base is coaxially built into the main sleeve and rotatably disposed within it. A rotating shaft is provided at the bottom of the inner sleeve base, and the two rotating wheels are rotatably sleeved at both ends of the shaft. The semi-locking component is rotatably disposed within the inner sleeve base, with one end being a semi-locking part and the other end being an unlocking part. The top of the semi-locking part abuts against the inner sleeve base via a spring, and the bottom of the semi-locking part is movably locked to one of the rotating wheels. The unlocking component is axially movable on the main sleeve and is connected to the unlocking part via a transmission connection.

[0006] In one embodiment, a transmission member is provided between the unlocking member and the unlocking part, with the lower end of the transmission member abutting against the unlocking part and the upper end of the transmission member abutting against the unlocking member.

[0007] In one embodiment, a limiting groove is provided at the upper end of the main sleeve, and the unlocking member is movably disposed in the limiting groove along the axial direction of the main sleeve, and at least part of the unlocking member extends radially out of the outer side wall of the main sleeve.

[0008] In one embodiment, a limiting cylinder is provided in the middle of the inner top of the main sleeve. The limiting cylinder is a cylindrical structure with openings at both ends, and the upper end of the limiting cylinder penetrates through the top of the main sleeve. The upper end of the transmission member passes through the limiting cylinder and abuts against the unlocking member.

[0009] In one embodiment, protrusions are symmetrically arranged on both sides of the semi-locking member, and two support seats of equal height are arranged at intervals at the lower end of the inner cylinder seat. Bearing holes are arranged at equal height on the two support seats, and the protrusions on both sides of the semi-locking member are rotatably arranged in the bearing holes of the two support seats.

[0010] In one embodiment, the two rotating wheels are provided with a plurality of annular locking teeth on their opposite sides. The bottom of the semi-locking part is provided with two locking blocks of different heights. The two locking blocks of different heights are located above the locking teeth of the two rotating wheels, and the locking block with the lower height is engaged with the locking teeth on the rotating wheel below it, while the locking block with the higher height is separated from the locking teeth on the rotating wheel below it.

[0011] In one embodiment, the limiting cylinder is composed of two mutually symmetrical half-cylinders, and the two half-cylinders are spaced apart.

[0012] In one embodiment, hooks are radially provided on the outer side walls of the two semi-cylinders, and a snap-fit ​​hole is provided through the top center of the inner cylinder seat. The inner cylinder seat passes through the snap-fit ​​hole and is movably supported on the hooks of the two semi-cylinders.

[0013] In one embodiment, the top of the inner cylinder seat is provided with an annular steel ball groove, in which multiple steel balls are evenly distributed, and the tops of the multiple steel balls abut against the inner top of the main sleeve.

[0014] In one embodiment, a wheel bearing is provided at the bottom of the inner cylinder seat, and the rotating shaft is disposed in the wheel bearing.

[0015] Compared with traditional technologies, the beneficial effects of the embedded brake swivel wheel described in this utility model are:

[0016] This invention features multiple steel balls evenly distributed in a ball bearing groove between the inner cylinder seat and the main sleeve. This ensures smooth and stable rotation of the inner cylinder seat relative to the main sleeve, preventing wobbling. Furthermore, a semi-locking component is installed at the lower end of the inner cylinder seat, with a semi-locking part on it. The top of the semi-locking part abuts against the inner cylinder seat via a spring, and the bottom of the semi-locking part has two locking blocks of different heights. This creates a lever-like structure between the semi-locking component and the inner cylinder seat. The spring force engages the lower locking block with the locking teeth on the wheel below it, while the other locking block remains separate from the wheel below. This achieves the effect of locking one wheel while allowing the other wheel to move relative to it. In other words, this invention… The two rotating wheels achieve a semi-locking effect through two stepped locking blocks in a semi-locking mechanism, preventing both wheels from being fully locked. Furthermore, the presence of springs allows for some rebound space in the semi-locking mechanism, preventing the wheels from being immediately braked and allowing them to move forward a certain distance. This means that if a device equipped with this utility model's embedded brake caster is accidentally bumped by a user, some force can be dissipated, reducing the impact on the user and lowering the risk of injury. Additionally, pressing down on the unlocking mechanism lowers the unlocking part by driving the transmission component, lifting the other end of the semi-locking part and disengaging the two locking blocks at the bottom of the semi-locking part from the two rotating wheels, thus unlocking the mechanism. After resetting the unlocking mechanism, the semi-locking part, under the spring force, moves downward again and engages with the locking teeth of one of the rotating wheels.

[0017] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is an exploded view of the embedded brake universal wheel of this utility model;

[0019] Figure 2 This is a schematic diagram of the main sleeve of the embedded brake universal wheel of this utility model;

[0020] Figure 3 This is a schematic diagram of the inner cylinder seat of the embedded brake universal wheel of this utility model;

[0021] Figure 4 This is a schematic diagram of the semi-locking component of the embedded brake universal wheel of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 10. Main sleeve; 11. Limiting sleeve; 12. Hook; 20. Inner sleeve seat; 21. Wheel bearing; 22. Support seat; 30. Rotating wheel; 31. Locking tooth; 40. Semi-locking component; 41. Protruding post; 42. Unlocking part; 43. Semi-locking part; 44. Locking block; 50. Unlocking component; 60. Transmission component; 70. Steel ball; 80. Rotating shaft. Detailed Implementation

[0024] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", 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 utility model and simplifying the description, and are not intended to 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 understood as a limitation on this utility model.

[0026] Traditional casters generally have various drawbacks. For example, the swivel structure of a common caster is usually formed by stamping. While this results in a simple and low-cost swivel structure, it has a short lifespan, and the rotating and stationary parts are prone to wobbling during use. Furthermore, traditional casters require large ball joints to limit their axial movement, leading to limited applicability and a narrow range of applications.

[0027] Please see Figures 1 to 4This embodiment provides an embedded brake swivel wheel, including a main sleeve 10, an inner cylinder seat 20, two rotating wheels 30, a semi-locking component 40, and an unlocking component 50. The main sleeve 10 is a cylindrical structure with an open lower end. The inner cylinder seat 20 is coaxially built into the interior of the main sleeve 10 and is rotatably disposed within the main sleeve 10. A rotating shaft 80 is provided at the bottom of the inner cylinder seat 20, and a wheel bearing 21 is provided at the bottom of the inner cylinder seat 20. The rotating shaft 80 is disposed within the wheel bearing 21. The two rotating wheels 30... The 0 are rotatably sleeved at both ends of the rotating shaft 80; the semi-locking member 40 is rotatably disposed in the inner cylinder seat 20, and one end of the semi-locking member 40 is a semi-locking part 43, and the other end is an unlocking part 42. The top of the semi-locking part 43 is in contact with the inner cylinder seat 20 by a spring, and the bottom of the semi-locking part 43 is movably locked with one of the rotating wheels 30; the unlocking member 50 is rotatably disposed on the main sleeve 10 along the axial direction of the main sleeve 10, and the unlocking member 50 is connected to the unlocking part 42 by transmission.

[0028] Furthermore, a transmission member 60 is provided between the unlocking member 50 and the unlocking part 42, with the lower end of the transmission member 60 abutting against the unlocking part 42 and the upper end of the transmission member 60 abutting against the unlocking member 50.

[0029] In this embodiment, a limiting groove is provided at the upper end of the main sleeve 10, and the unlocking member 50 is movably disposed in the limiting groove along the axial direction of the main sleeve 10, with at least a portion of the unlocking member 50 extending radially out of the outer side wall of the main sleeve 10. Additionally, a limiting cylinder 11 is provided at the middle of the inner top of the main sleeve 10. The limiting cylinder 11 is a cylindrical structure with openings at both ends, and its upper end penetrates the top of the main sleeve 10. The upper end of the transmission member 60 passes through the limiting cylinder 11 and abuts against the unlocking member 50.

[0030] Therefore, the transmission member 60 in this embodiment can also be limited by the limiting cylinder 11 so that the transmission member 60 will not deviate when the unlocking member 50 drives the transmission member 60 to move, and ensure that the lower end of the transmission member 60 can press against the unlocking part 42 of the semi-locking member 40.

[0031] Optionally, protrusions 41 are symmetrically arranged on both sides of the semi-locking member 40, and two support seats 22 of equal height are arranged at the lower end of the inner cylinder seat 20. Bearing holes are arranged at equal height on the two support seats 22, and the protrusions 41 on both sides of the semi-locking member 40 are rotatably arranged in the bearing holes of the two support seats 22.

[0032] The two rotating wheels 30 are respectively provided with a plurality of annular locking teeth 31 on their opposite sides. The bottom of the semi-locking part 43 is provided with two locking blocks 44 of different heights. The two locking blocks 44 of different heights are respectively located above the locking teeth 31 of the two rotating wheels 30. The locking block 44 with the lower height is locked with the locking teeth 31 on the rotating wheel 30 below it, while the locking block 44 with the higher height is separated from the locking teeth 31 on the rotating wheel 30 below it.

[0033] Optionally, the limiting cylinder 11 in this embodiment is composed of two symmetrical semi-cylinders, which are spaced apart. Further, hooks 12 are radially provided on the outer side walls of the two semi-cylinders, and a snap-fit ​​hole is provided through the middle of the top of the inner cylinder seat 20. The inner cylinder seat 20 passes through the two semi-cylinders through the snap-fit ​​hole and is movably supported on the hooks 12 of the two semi-cylinders.

[0034] In other words, the two semi-cylinders are spaced apart, which allows each semi-cylinder to have a certain degree of elasticity. When the inner cylinder seat 20 is installed, the two semi-cylinders can be driven to move a certain distance relative to each other, so that the snap-fit ​​hole on the inner cylinder seat 20 can just pass through the two semi-cylinders. Then the two semi-cylinders are released so that the limiting cylinder 11 can be reset, thereby supporting the inner cylinder seat 20.

[0035] Furthermore, the top of the inner cylinder seat 20 is provided with an annular steel ball groove, in which a plurality of steel balls 70 are evenly distributed, and the tops of the plurality of steel balls 70 abut against the inner top of the main sleeve 10. For example, in this embodiment, the steel ball groove 25 is provided with 20-24 steel balls 70, so that when the inner cylinder seat 20 rotates relative to the main sleeve 10, the two are not prone to shaking, and the rotation process is smooth and stable.

[0036] Therefore, this utility model provides multiple steel balls 70 in the ball bearing groove between the inner cylinder seat 20 and the main sleeve 10, ensuring that the steel balls 70 are evenly distributed. This allows the inner cylinder seat 20 to rotate smoothly and stably relative to the main sleeve 10, preventing wobbling. Furthermore, this utility model provides a semi-locking member 40 at the lower end of the inner cylinder seat 20, with a semi-locking part 43 on the semi-locking member 40. The top of the semi-locking part 43 abuts against the inner cylinder seat 20 via a spring, and the bottom of the semi-locking part 43 has two locking blocks 44 of different heights. This creates a lever-like structure between the semi-locking member 40 and the inner cylinder seat 20. The spring force engages the lower locking block 44 with the locking teeth 31 on the lower rotating wheel 30, while the other locking block 44 is separated from the lower rotating wheel 30. This achieves the effect of locking one rotating wheel 30 while allowing the other to move relatively freely. The two rotating wheels 30 of this utility model can achieve a semi-locking effect through the two stepped locking blocks 44 of the semi-locking member 40, without completely locking both rotating wheels 30. Furthermore, due to the presence of the spring, the semi-locking member 40 has a certain amount of rebound space, so the rotating wheels 30 will not be immediately braked and can move forward a certain distance. In this way, if the device equipped with the embedded brake universal wheel of this utility model is accidentally bumped by the user, a certain amount of force can be dissipated, thereby reducing the reaction force on the user and reducing the risk of user injury. In addition, when the unlocking member 50 is pressed down, the driving transmission member 60 can be driven to move down and press the unlocking part 42 to lift the semi-locking part 43 at the other end of the semi-locking member 40, so that the two locking blocks 44 at the bottom of the semi-locking part 43 are disengaged from the two rotating wheels 30, thereby realizing the unlocking action. After the unlocking member 50 is reset, the semi-locking member 40, under the elastic force of the spring, causes the semi-locking part 43 to move down again and engage with the locking teeth 31 of one of the rotating wheels 30.

[0037] The above-described embodiments are merely illustrative of several implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the embedded brake swivel wheel of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. An embedded brake universal wheel, characterized in that: It includes a main sleeve, an inner cylinder seat, two rotating wheels, a semi-locking piece, and an unlocking piece; the main sleeve is a cylindrical structure with an opening at the lower end, the inner cylinder seat is coaxially built into the interior of the main sleeve, and the inner cylinder seat is rotatably arranged in the main sleeve; a rotating shaft is arranged at the bottom of the inner cylinder seat, and the two rotating wheels are rotatably mounted on both ends of the rotating shaft respectively; the semi-locking piece is rotatably arranged in the inner cylinder seat, and one end of the semi-locking piece is a semi-locking part, and the other end is an unlocking part, the top of the semi-locking part is abutted against the inner cylinder seat by a spring, and the bottom of the semi-locking part is movably locked with one of the rotating wheels; the unlocking piece can be movably arranged on the main sleeve along the axial direction of the main sleeve, and the unlocking piece and the unlocking part are transmission connected.

2. The built-in brake universal wheel according to claim 1, characterized in that: A transmission member is arranged between the unlocking member and the unlocking portion, the lower end of the transmission member abuts against the unlocking portion, and the upper end of the transmission member abuts against the unlocking member.

3. The built-in brake universal wheel according to claim 2, characterized in that: A limiting groove is arranged at the upper end of the main sleeve, and the unlocking member is movably arranged in the limiting groove along the axial direction of the main sleeve, and at least a part of the unlocking member radially extends out of the outer side wall of the main sleeve.

4. The built-in brake universal wheel according to claim 2, characterized in that: A limiting cylinder is arranged in the middle of the inner top of the main sleeve. The limiting cylinder is a cylindrical structure with two ends opened, and the upper end of the limiting cylinder passes through the top of the main sleeve. The upper end of the transmission member abuts against the unlocking member after passing through the limiting cylinder.

5. The built-in brake universal wheel according to claim 2, characterized in that: The two sides of the semi-locking piece are symmetrically provided with convex columns, and the lower end of the inner cylinder seat is provided with two support seats of equal height at intervals, and the two support seats are provided with bearing holes of equal heights, and the convex columns on both sides of the semi-locking piece are rotatably arranged in the bearing holes of the two support seats.

6. The built-in brake universal wheel according to claim 1, characterized in that: A plurality of annular locking teeth are respectively arranged on one side opposite to the other of the two rotating wheels, and two locking blocks of different heights are respectively arranged on the bottom of the semi-locking portion. The two locking blocks of different heights are respectively located above the locking teeth of the two rotating wheels, and the lower locking block is clamped with the locking teeth on the rotating wheel below it, and the higher locking block is separated from the locking teeth on the rotating wheel below it.

7. The built-in brake universal wheel according to claim 4, characterized in that: The limiting cylinder is composed of two mutually symmetrical semi-cylinders, and the two semi-cylinders are spaced apart from each other.

8. The built-in brake universal wheel according to claim 7, characterized in that: The outer side walls of the two semi-cylinders are radially provided with hooks respectively, and a connecting hole is provided through the middle of the top of the inner cylinder seat. The inner cylinder seat passes through the two semi-cylinders through the connecting hole and is movably supported on the hooks of the two semi-cylinders.

9. The built-in brake universal wheel according to claim 8, characterized in that: The top of the inner cylinder seat is provided with an annular steel ball clamping groove, in which a plurality of steel balls are evenly distributed, and the tops of the plurality of steel balls are in contact with the inner top of the main sleeve.

10. The built-in brake universal wheel according to claim 1, characterized in that: A wheel bearing is arranged at the bottom of the inner cylinder seat, and the rotating shaft is arranged in the wheel bearing.

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