Lifting double wheel

Abstract

The utility model relates to a kind of lifting double wheels, it includes support, the support is provided with double wheels, lifting assembly is provided on the support;The lifting assembly includes double-end threaded rod and lifting rod;The lifting rod is inserted into the double-end threaded rod and is threadedly connected with it;The double-end threaded rod is connected with upper bearing seat and lower bearing seat, the upper bearing seat is connected with the upper surface of the support by steel ball rotary connection;The lower bearing seat is connected with the lower surface of the support by steel ball rotary connection.The utility model has the effect of stable and efficient adjustment lifting.

Description

Technical Field

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

[0002] In industrial handling, equipment support and other fields, pulley systems are widely used due to their ease of movement. Among them, the height-adjustable double wheel structure must simultaneously meet the requirements of height adjustment stability, rotation flexibility and structural stability to adapt to different working conditions.

[0003] In existing technologies, the lifting components of such devices often use a single threaded rod and a single nut, which is prone to wobbling due to thread clearance during adjustment, leading to unstable lifting. The bearing housing and bracket are mostly in direct rigid contact, resulting in high frictional resistance during rotation and severe wear after prolonged use, affecting service life. Furthermore, the adjustment drive method for lifting is singular, making it less convenient for use in confined spaces or labor-saving scenarios. These problems result in significant deficiencies in the stability, durability, and operational efficiency of existing devices. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a lifting double wheel with stable and efficient lifting adjustment effect.

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

[0006] A lifting double wheel includes a bracket, the bracket is provided with double wheels, and a lifting component is provided on the bracket;

[0007] The lifting assembly includes a double-threaded rod and a lifting rod; the lifting rod is inserted into the double-threaded rod and threadedly connected to it.

[0008] The double-threaded rod is connected to an upper bearing seat and a lower bearing seat.

[0009] The upper bearing seat is rotatably connected to the upper surface of the bracket via steel balls;

[0010] The lower bearing seat is rotatably connected to the lower surface of the bracket via steel balls.

[0011] Through the above technical solution, the lifting component on the bracket achieves stable lifting by means of the threaded engagement between the double-headed threaded rod and the lifting rod, meeting different height requirements; the upper and lower bearing seats are connected to the bracket by steel balls, which greatly reduces the relative rotational resistance, ensures that the two wheels rotate flexibly during the lifting process, and improves the overall smoothness of operation.

[0012] As a further technical solution of this utility model: a first gasket is provided between the upper bearing seat and the bracket, and a second gasket is abutted against the lower part of the lower bearing seat.

[0013] Through the above technical solution, the first gasket between the upper bearing housing and the bracket, and the second gasket below the lower bearing housing, can disperse the contact pressure, avoid wear caused by direct hard contact between components, extend the service life of the bracket and the bearing housing, and at the same time reduce vibration transmission and improve structural stability.

[0014] As a further technical solution of this utility model: the bottom of the double-threaded rod is threaded with a first nut, and the upper surface of the first nut abuts against the second washer.

[0015] Through the above technical solution, the first nut at the bottom of the double-threaded rod abuts against the second washer, which not only prevents the lower bearing seat from axially moving due to vibration during the lifting process, but also does not hinder the lower bearing seat from rotating with the steel ball, thus ensuring the stability and rotational flexibility of the overall structure under load.

[0016] As a further technical solution of this utility model: the lifting rod is threaded with a second nut, and the second nut abuts against the bottom end face of the double-ended threaded rod.

[0017] With the above technical solution, after the lifting rod is adjusted to the target height, tightening the second nut of its threaded connection so that it abuts against the bottom end face of the double-threaded rod can lock the relative position of the two, effectively preventing the axial movement of the lifting rod, ensuring stable height positioning, and not interfering with the smoothness of lifting adjustment.

[0018] As a further technical solution of this utility model: the bottom end of the lifting rod is rotatably connected with a foot pad.

[0019] Through the above technical solution, the rotating connecting foot pad at the bottom of the lifting rod can adaptively adjust the contact angle according to the ground slope, increasing the contact area with the ground, which not only improves the stability when the two wheels are stationary, but also reduces the friction wear between the foot pad and the ground, and extends the service life.

[0020] As a further technical solution of this utility model: the lifting rod is fixedly connected with a third nut.

[0021] With the above technical solution, the third nut fixedly connected to the lifting rod can be used as an operating fulcrum. By rotating the nut, the lifting rod can be driven to rotate synchronously directly, and the lifting adjustment can be completed without direct contact with the lifting rod, which simplifies the operation process and improves the adjustment efficiency.

[0022] As a further technical solution of this utility model: a hexagonal groove is provided at the top of the lifting rod.

[0023] Through the above technical solution, the hexagonal groove at the top of the lifting rod can be adapted to the application of force by tools, directly driving the lifting rod to rotate. Combined with its threaded connection with the double-ended threaded rod, lifting is achieved, effectively improving the ease of operation.

[0024] As a further technical solution of this utility model: an annular rubber ring is provided on the outer periphery of the bottom end of the upper bearing seat, and the annular rubber ring is in clearance fit with the bracket.

[0025] Through the above technical solution, the annular rubber ring between the bottom outer periphery of the upper bearing housing and the bracket can seal the gap between the two, preventing dust and impurities from entering the steel ball rotation area; at the same time, the elasticity of the rubber ring can buffer vibration, reduce the impact wear between the steel ball and the bearing housing, and ensure the smoothness of the rotating structure during long-term use.

[0026] In summary, this utility model has at least one of the following beneficial technical effects:

[0027] 1. This utility model discloses a lifting double wheel, which achieves stable and efficient lifting adjustment through the threaded engagement of the lifting assembly, the driving of the third nut and the locking of the second nut.

[0028] 2. This utility model discloses a lifting double wheel, which achieves wear-resistant protection of components and overall structural stability through pressure dispersion by shims, fastening connection by nuts, and adaptive adjustment of foot pads connected by rotation.

[0029] 3. This utility model discloses a lifting double wheel, which reduces rotational resistance through steel balls, seals dustproof with annular rubber rings, and buffers vibration, thereby achieving smooth rotation and extending the life of core components. Attached Figure Description

[0030] Figure 1 This is a structural schematic diagram of a first embodiment of the lifting double wheel of this utility model.

[0031] Figure 2 This is a right view of a first embodiment of the lifting double wheel of this utility model.

[0032] Figure 3 This is a cross-sectional view of a first embodiment of the present invention, which features a lifting double wheel.

[0033] Figure 4 This is a top view of one embodiment of the lifting double wheel of this utility model.

[0034] Reference numerals: 1. Bracket; 2. Double wheel; 3. Lifting assembly; 31. Double-headed threaded rod; 32. Lifting rod; 321. Hexagonal groove; 322. Spherical head; 4. Upper bearing seat; 5. Lower bearing seat; 6. Steel ball; 7. First washer; 8. Second washer; 9. First nut; 10. Second nut; 11. Foot pad; 12. Third nut; 13. Annular rubber ring. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] Example 1:

[0039] Reference Figure 1 and Figure 3 The present invention discloses a lifting double wheel, including a bracket 1, a double wheel 2 rotatably mounted on the side of the bracket 1, an upper bearing seat 4 and a lower bearing seat 5 respectively adapted to be installed inside the top and bottom of the bracket 1, and a lifting component 3 is provided through the bracket 1.

[0040] Reference Figure 2 and Figure 3 The lifting assembly 3 consists of a hollow double-ended threaded rod 31 with open ends and a lifting rod 32. The inner wall of the double-ended threaded rod 31 is machined with internal threads, and the outer wall of the lifting rod 32 is machined with external threads. The lifting rod 32 is inserted into the lower end opening of the double-ended threaded rod 31 and threadedly connected to it. Axial lifting adjustment is achieved through the screw drive cooperation between the two.

[0041] Reference Figure 3 Between the upper bearing seat 4 and the upper surface of the bracket 1, and between the lower bearing seat 5 and the lower surface of the bracket 1, there are annularly distributed steel balls 6. The steel balls 6 are embedded in the annular track between the two to form rolling support to reduce relative rotational resistance.

[0042] Reference Figure 3 A first gasket 7 is sandwiched between the upper bearing housing 4 and the bracket 1, and a second gasket 8 is abutted against the lower part of the lower bearing housing 5. The two increase the contact area to disperse the pressure and reduce hard contact wear.

[0043] Reference Figure 1 and Figure 3 An annular rubber ring 13 is provided on the outer periphery of the bottom end of the upper bearing housing 4. The annular rubber ring 13 is made of nitrile rubber. It is in clearance fit with the outer ring of the bottom end of the upper bearing housing 4 and the annular edge of the upper surface of the bracket 1. It can effectively seal to prevent dust from entering the rotating area of ​​the steel ball 6, reduce the impact transmission between the upper bearing housing 4 and the bracket 1, and ensure the long-term smooth operation of the rotating structure.

[0044] Reference Figure 3 The bottom outer wall of the double-threaded rod 31 is machined with external threads, and the threaded connection is a first nut 9. The upper surface of the first nut 9 abuts against the second washer 8. Through the limiting effect of the first nut 9, the axial movement of the lower bearing seat 5 is prevented due to vibration during the lifting process, while not affecting the free rotation of the lower bearing seat 5 with the steel ball 6, thus taking into account both connection stability and rotation flexibility.

[0045] Reference Figure 3 The lifting rod 32 is also threaded with a second nut 10. When the lifting rod 32 is adjusted to the target height, the second nut 10 is tightened so that it abuts against the bottom end face of the double-threaded rod 31, which can lock the relative position of the lifting rod 32 and the double-threaded rod 31 and prevent the height from shifting due to external force or vibration during use.

[0046] Reference Figure 3 A third nut 12 is fixedly connected to the lower section of the lifting rod 32 (this position corresponds to the outer bottom end of the double-threaded rod 31). The third nut 12 and the lifting rod 32 can be fixed by integral molding or threaded connection. The third nut 12 serves as an operating fulcrum and can be manually or with a tool to rotate the lifting rod 32 synchronously. (Refer to...) Figure 4 The top of the lifting rod 32 has a concave hexagonal groove 321, which is compatible with tools such as Allen wrenches. When space is limited or effortless adjustment is required, torque can be applied by inserting the tool into the hexagonal groove 321 to drive the lifting rod 32 to rotate.

[0047] Reference Figure 1 and Figure 3The bottom end of the lifting rod 32 is integrally formed with a spherical head 322, which is rotatably connected to the foot pad 11. The foot pad 11 is made of elastic rubber, and its inner hole encloses the spherical head 322 to prevent accidental dislodgement. The ball joint structure allows the foot pad 11 to deflect and avoid interference from the wheels of the double wheels 2 during lifting, and it can also swing adaptively with the slope after touching the ground, balancing the smoothness of lifting operation and the support stability when stationary. In addition, an anti-slip pad can be installed on the bottom of the foot pad 11 to enhance the anti-slip and ground protection effect.

[0048] The present invention relates to a working process for a lifting double wheel:

[0049] In use, the lifting rod 32 can be adjusted in two ways: one is by manually turning the third nut 12 at the bottom of the lifting rod 32, and the other is by inserting a tool such as an Allen wrench into the hexagonal groove 321 at the top of the lifting rod 32 to apply force. Both methods can drive the lifting rod 32 to rotate synchronously within the double-threaded rod 31. With the help of the threaded engagement between the lifting rod 32 and the double-threaded rod 31, the lifting rod 32 can extend or retract axially to adjust the overall height of the device. During this process, the foot pad 11 at the bottom of the lifting rod 32 automatically deflects through the ball joint structure of the ball head 322 to avoid interference from the wheel bodies of the double wheels 2, ensuring unobstructed lifting action. At the same time, the steel balls 6 between the upper bearing seat 4 and the bracket 1, and between the lower bearing seat 5 and the bracket 1, reduce rotational resistance through rolling contact, making the adjustment smoother. The first shim 7 and the second shim 8 disperse the contact pressure to avoid hard contact wear of the components.

[0050] After the lifting rod 32 is adjusted to the required height, tighten the second nut 10 on the lifting rod 32 so that the second nut 10 tightly abuts against the bottom end face of the double-threaded rod 31. The rigid contact between the two locks the relative position of the lifting rod 32 and the double-threaded rod 31, preventing height fluctuations due to vibration or external impact during use. At this time, the first nut 9 continuously abuts against the second washer 8, strengthening the connection between the lower bearing seat 5, the second washer 8 and the bracket 1 to resist vibration and loosening. The annular rubber ring 13 seals the gap between the upper bearing seat 4 and the bracket 1 through clearance fit, preventing dust from entering the rotating area of ​​the steel ball 6 to ensure long-term smooth operation. The foot pad 11 adapts to the ground slope with the ball joint, forming a stable support to ensure that the device does not tilt when stationary.

[0051] The implementation principle of this utility model is as follows: Based on the principles of mechanical transmission and structural mechanics, the components work together to achieve the following functions: the bracket 1 supports the double wheels 2 and the lifting assembly 3; the double-threaded rod 31 and the lifting rod 32 convert rotational force into axial displacement through helical transmission, ensuring controllable lifting; the steel balls 6 reduce the rotational resistance between the upper bearing seat 4, the lower bearing seat 5 and the bracket 1 through rolling contact, making the adjustment smoother; the first shim 7 and the second shim 8 disperse pressure and avoid metal-to-metal contact wear; the first nut 9 provides axial limit to prevent the lower bearing seat 5 from shifting without hindering its rotation; the second nut 10 locks the relative position of the lifting rod 32 and the double-threaded rod 31 to prevent loosening; the annular rubber ring 13 seals against dust and buffers vibration; the foot pad 11 uses a ball joint structure to adaptively swing, avoiding the double wheels 2 and providing stable support. The components work together to achieve stable lifting, smooth operation and long-term reliable operation.

[0052] 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 lifting double wheel comprising a support (1) provided with a double wheel (2), characterized in that, The support (1) is equipped with a lifting assembly (3); The lifting assembly (3) includes a double-ended threaded rod (31) and a lifting rod (32); the lifting rod (32) is inserted into the double-ended threaded rod (31) and threadedly connected to it; The double-threaded rod (31) is connected to an upper bearing seat (4) and a lower bearing seat (5); The upper bearing seat (4) and the upper surface of the bracket (1) are rotatably connected by steel balls (6); The lower bearing seat (5) and the lower surface of the bracket (1) are rotatably connected by steel balls (6).

2. The lifting double wheel according to claim 1, characterized in that A first gasket (7) is provided between the upper bearing seat (4) and the bracket (1), and a second gasket (8) is abutted against the lower bearing seat (5).

3. The lifting double wheel according to claim 2, characterized in that The bottom of the double-threaded rod (31) is threaded with a first nut (9), and the upper surface of the first nut (9) abuts against the second washer (8).

4. The lift doublet of claim 1, wherein, The lifting rod (32) is threadedly connected to a second nut (10), which abuts against the bottom end face of the double-threaded rod (31).

5. The lift doublet of claim 1, wherein, The bottom end of the lifting rod (32) is rotatably connected to a foot pad (11).

6. The lift doublet of claim 1, wherein, The lifting rod (32) is fixedly connected to a third nut (12).

7. The lift doublet of claim 1, wherein, The top of the lifting rod (32) has a hexagonal groove (321).

8. The lift doublet of claim 1, wherein, An annular rubber ring (13) is provided on the outer periphery of the bottom end of the upper bearing seat (4), and the annular rubber ring (13) is in clearance fit with the bracket (1).

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