Damping lead screw trundle
By plugging springs on the caster screw, the problem of existing casters lacking shock absorption is solved, and shock absorption protection and overload detection are achieved to avoid equipment damage.
Patent Information
- Application Number
- CN202422393116.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-30
AI Technical Summary
The existing caster structure lacks shock absorption function, which causes a large amount of vibration when the load is heavy and passes through bumpy road surfaces, which may cause damage to the main structure.
A shock-absorbing screw caster is designed. By connecting a spring to the screw, the two ends of the spring interfere with each other tightly against the frame and caster assembly, the overload situation is calculated using the spring deformation to avoid frame deflection.
It achieves good shock absorption protection effect, avoids frame skew, judges overload usage by measuring spring deformation, and protects the equipment structure.
Smart Images
Figure CN223131718U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a caster mechanism, specifically, a shock-absorbing screw caster. Background Art
[0002] At present, the casters provided in the market all adopt eccentric rolling wheels fixed on a rotatable main shaft. Various furniture and household appliances can use the casters as supporting feet, and can be easily and quickly moved in any direction by means of the casters.
[0003] The structure of the traditional caster is to install a nut on the caster screw. The screw passes through the frame, and then the nut is installed to lock the caster on the main structure. The equipment can walk through four casters, but the caster of this structure is rigidly connected to the main structure it bears, lacking shock-absorbing function. A large amount of rigid vibration will be generated when the load is large and passing through a bumpy road surface, which may lead to damage to the main structure.
[0004] To solve this problem, we need to design a caster mechanism with shock-absorbing function and anti-tilting function. Summary of the Invention
[0005] Object of the Invention: The purpose of the utility model is to provide a shock-absorbing screw caster aiming at the deficiencies of the prior art.
[0006] Technical Solution: The shock-absorbing screw caster described in the utility model includes a caster mechanism connected to the frame. The caster mechanism includes a screw and a caster assembly. The top of the screw passes through and is fixedly connected to the frame. The caster assembly is connected to the lower end of the screw. A spring is sleeved on the screw, and both ends of the spring are interference-fitted and abutted against the frame and the caster assembly respectively.
[0007] Preferably, the caster assembly includes a caster body and a turntable installed at the connection between the caster body and the screw. Both ends of the spring are interference-fitted and abutted against the frame and the turntable respectively.
[0008] Preferably, a first nut cooperating with the screw abuts against the upper end of the turntable. A first gasket is placed on the first nut, and one end of the spring abuts against the first gasket.
[0009] Preferably, a second gasket is provided below the frame, and the other end of the spring opposite to the first gasket abuts against the second gasket.
[0010] The utility model has the following beneficial effects compared with the prior art: (1) It can achieve a good shock-absorbing and protecting effect;
[0011] (2) By measuring the deformation of the spring, it can be calculated whether the caster is overloaded, avoiding the skew of the frame. Description of the Drawings
[0012] Figure 1 Schematic structural diagram of a shock-absorbing screw caster of the present utility model;
[0013] Figure 2 Exploded structural diagram of a shock-absorbing screw caster of the present utility model.
[0014] In the figure: 1. Spring; 2. Caster mechanism; 21. Screw rod; 22. Caster assembly; 221. Turntable; 222. Caster body; 3. First nut; 4. First gasket; 5. Second gasket; 6. Frame. Specific embodiments
[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.
[0017] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0018] The technical solutions of the present invention will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.
[0019] A shock-absorbing screw caster, comprising a caster mechanism 2 connected to a frame 6. The caster mechanism 2 includes a screw rod 21 and a caster assembly 22. The top end of the screw rod 21 passes through and is fixedly connected to the frame 6. The caster assembly 22 is connected to the lower end of the screw rod 21. A spring 1 is sleeved on the screw rod 21, and both ends of the spring 1 are in interference fit and abutted against the frame 6 and the caster assembly 22 respectively.
[0020] Specifically, the caster assembly 22 includes a caster body 222 and a turntable 221 installed at the connection between the caster body 222 and the screw rod 21. Both ends of the spring 1 are in interference fit and abutted against the frame 6 and the turntable 221 respectively. A first nut 3 that cooperates with the screw rod 21 abuts against the upper end of the turntable 221. A first gasket 4 is placed on the first nut 3. One section of the spring 1 abuts against the first gasket 4. A second gasket 5 is provided below the frame 6. The section of the spring 1 opposite to the first gasket 4 abuts against the second gasket 5.
[0021] In the working state, the second gasket 5 will be subjected to the pressure of the frame 6, and the spring 1 and the first gasket 4 bear the pressure. Thus, the spring 1 will be compressed, playing a shock-absorbing role. Moreover, the compression degree of the spring 1 can be converted into the force value borne by the caster assembly 22. When the spring 1 is stressed, it will deform. According to Hooke's law, the force value can be calculated. By measuring the deformation amount of the spring 1, it can be determined whether the caster is overloaded, avoiding the skew of the frame 6.
[0022] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first feature and the second feature are in direct contact, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature. In the description of this specification, the description of reference terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.
[0023] Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without conflict, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention.
Claims
1. A shock-absorbing screw caster, comprising a caster mechanism connected to a frame, characterized in that: The caster mechanism includes a lead screw and a caster assembly. The top end of the lead screw passes through and is fixedly connected to the frame. The caster assembly is connected to the lower end of the lead screw. A spring is sleeved on the lead screw, and both ends of the spring are in interference fit and abutted tightly against the frame and the caster assembly respectively.
2. The shock-absorbing screw caster according to claim 1, characterized in that: The caster assembly includes a caster body and a turntable installed at the connection between the caster body and the lead screw. Both ends of the spring are in interference fit and abutted tightly against the frame and the turntable respectively.
3. The shock-absorbing screw caster according to claim 2, wherein: A first nut matching the lead screw abuts against the upper end of the turntable. A first gasket is placed on the first nut, and one end of the spring abuts against the first gasket.
4. The shock-absorbing screw caster according to claim 3, characterized in that: A second gasket is provided below the frame, and the other end of the spring opposite to the first gasket abuts against the second gasket.