A sliding gap elimination structure
By employing a sliding clearance elimination structure using wedge-shaped and elastic components in the linear motion module, the accuracy and stability issues caused by the gap between the slider and the slide rail are resolved, achieving a high-precision and low-friction sliding effect and extending the module's lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGXI LITUO INTELLIGENT TECH CO LTD
- Filing Date
- 2025-07-07
- Publication Date
- 2026-07-10
AI Technical Summary
In existing linear motion modules, there is a gap between the slider and the fixed guide rail, which leads to a reduction in motion accuracy, stability and service life, especially in high-precision and high-speed operation scenarios.
The sliding gap elimination structure includes a first wedge, a second wedge, and an elastic element. The gap is eliminated by the tight fit of the wedge surfaces, and the elastic force is used to maintain close contact. It is suitable for planar and cylindrical fasteners.
It significantly improves the motion accuracy and stability of linear motion modules, reduces sliding friction resistance, extends service life, and is highly adaptable to various application needs.
Smart Images
Figure CN224479183U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sliding gap elimination technology, and in particular to a sliding gap elimination structure. Background Technology
[0002] Linear motion modules are indispensable mechanical components in modern industrial production, widely used in automated equipment, precision machine tools, and various transmission devices. Their core function is to achieve precise and stable movement of objects along a straight line. In existing linear motion module designs, a certain gap generally exists between the slider and the fixed guide rail. This design flaw causes numerous adverse effects. In high-precision machining scenarios, such as semiconductor manufacturing and optical instrument assembly, the gap between the slider and the guide rail can lead to minute positional deviations. For example, in the manufacturing process of microelectronic chips, even slight wobbling of the slider can cause inaccurate soldering of chip pins, thus affecting the chip's electrical performance and reliability. Furthermore, the gap also affects the motion stability of the linear motion module. Under high-speed operation or uneven load conditions, the gap between the slider and the guide rail can easily induce vibration. For example, in the material handling process on automated production lines, vibration can cause material displacement or damage during transport, increasing production costs and defect rates.
[0003] The gap between the slider and the fixed guide rail in existing linear motion modules has become a key factor restricting their performance improvement and application expansion. Therefore, there is an urgent need for a new technical solution to effectively solve the above problems and improve the motion accuracy, stability, and service life of linear motion modules. Summary of the Invention
[0004] The purpose of this invention is to provide a sliding gap elimination structure to address the above-mentioned problems, thereby solving the technical problem that the gap between the slider and the fixed slide rail in traditional linear motion modules causes a reduction in motion accuracy, stability, and service life.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a sliding gap elimination structure, comprising a fixing member, a sliding member, a first wedge, a second wedge, and a first elastic member. The sliding member is slidably mounted on the fixing member. The sliding member is provided with a mounting groove facing the fixing member. The first wedge and the second wedge are movably fitted into the mounting groove. One end of the first wedge is provided with a first stop edge, and the other end is provided with a second stop edge. A first wedge surface is provided in the middle of the first wedge. The second wedge is movably mounted in the mounting groove. The second wedge is provided with a second wedge surface. The first wedge surface can be tightly fitted with the second wedge surface. The first elastic member is installed between the second wedge and the second stop edge, and the first elastic member can make the second wedge surface fit against the first wedge surface. A limiting edge is provided in the mounting groove, and the limiting edge can abut against the first stop edge.
[0006] Furthermore, it also includes a semi-locking nut, wherein the first wedge is provided with an elongated hole, the semi-locking nut passes through the elongated hole and is fixedly connected to the sliding member, and the first wedge is movable relative to the sliding member.
[0007] Furthermore, it includes two sets of first wedges, second wedges, first elastic elements, and second stop edges. The two sets of first wedges, second wedges, first elastic elements, and second stop edges are symmetrically arranged in the mounting groove, and the second wedges are connected as a single unit. A gap is provided between the two first wedges.
[0008] Furthermore, the first elastic element is a spring, with one end of the spring abutting against the second stop edge and the other end abutting against the second wedge-shaped element.
[0009] Furthermore, it also includes a second elastic element, which allows the first wedge-shaped element to press against the fixing element.
[0010] Furthermore, it includes two sets of the first wedge, the second wedge, the first elastic element, the second elastic element, and the second stop, the two sets of the first wedge, the second wedge, the first elastic element, the second elastic element, and the second stop are symmetrically arranged in the mounting groove, and the second wedge is connected as a whole, and a gap is provided between the two first wedges.
[0011] Furthermore, the fixing member is cylindrical, the sliding member is slidably fitted onto the fixing member, the first wedge and the second wedge are both annular structures with notches, the first wedge is fitted onto the fixing member, the second wedge is fitted onto the first wedge, the second elastic member is annular, and the second elastic member is fitted onto the outer wall of the first wedge.
[0012] Furthermore, both the second stop and the first elastic member are annular, with the second stop abutting against one end of the first elastic member.
[0013] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows:
[0014] 1. This utility model, by setting a first wedge and a second wedge, and utilizing the elastic force of the first elastic element to ensure a tight fit between the second wedge surface and the first wedge surface, forms a tight contact between the sliding element and the fixed element. This structure effectively eliminates the gap between the sliding element and the fixed element when stationary, significantly improving the motion accuracy of the linear motion module. It solves the technical problem in traditional linear motion modules where excessive gaps exist between the slider and the fixed guide rail, resulting in reduced motion accuracy, stability, and service life.
[0015] 2. This utility model can be applied to both planar and cylindrical fasteners, improving its adaptability and making it easier to meet the needs of different users.
[0016] 3. The two sets of first wedge-shaped members, second wedge-shaped members, first elastic members and second stop edges of this utility model are symmetrical and connected as a whole, which can realize the zero-gap release of the bidirectional movement of the sliding member and realize the movement of the sliding member with low sliding friction resistance. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present invention (perspective view of the fastener);
[0018] Figure 2 This is a cross-sectional structural diagram of Embodiment 1 of the present utility model;
[0019] Figure 3 This is a three-dimensional structural diagram of Embodiment 2 of the present invention (slider perspective view);
[0020] Figure 4 This is a cross-sectional structural diagram of Embodiment 2 of this utility model.
[0021] In the attached diagram, 1-fixed component, 2-sliding component, 3-first wedge component, 4-second wedge component, 5-first elastic component, 6-semi-locking nut, 7-second elastic component, 21-mounting groove, 22-limiting edge, 31-first stop edge, 32-second stop edge, 33-first wedge surface, 34-first wedge component A, 35-first wedge component B, 41-second wedge surface, 51-first elastic component A, 52-first elastic component B. Detailed Implementation
[0022] The specific implementation of the utility model will be further described below with reference to the accompanying drawings.
[0023] In the description of this utility model, it should be understood that the terms "center", "length", "width", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.
[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0026] Example 1
[0027] Please see Figure 1 and Figure 2 A sliding gap elimination structure includes a fixing member 1, a sliding member 2, a first wedge member 3, a second wedge member 4, and a first elastic member 5. The sliding member 2 is slidably mounted on the fixing member 1. The sliding member 2 is provided with a mounting groove 21 facing the fixing member 1. The first wedge member 3 and the second wedge member 4 are movably fitted into the mounting groove 21. One end of the first wedge member 3 is provided with a first stop 31, and the other end is provided with a second stop 32. The middle part of the first wedge member 3 is provided with a first wedge surface 33. The second wedge member 4 is movably mounted into the mounting groove 21. The second wedge member 4 is provided with a second wedge surface 41. The first wedge surface 33 can fit tightly with the second wedge surface 41. The first elastic member 5 is installed between the second wedge member 4 and the second stop 32. The first elastic member 5 can make the second wedge surface 41 fit with the first wedge surface 33. A limiting edge 22 is provided in the mounting groove 21. The limiting edge 22 can abut against the first stop 31.
[0028] In this embodiment, a semi-locking nut 6 is also included. The first wedge 3 has an elongated hole, through which the semi-locking nut 6 passes and is fixedly connected to the sliding member 2. The first wedge is movable relative to the sliding member 2. The semi-locking nut 6 allows for pre-installation of the first wedge 3, facilitating its fixation and installation.
[0029] In this embodiment, two sets of first wedge-shaped members 3, second wedge-shaped members 4, first elastic members 5, and second stop edges 32 are included. These two sets of first wedge-shaped members 3, second wedge-shaped members 4, first elastic members 5, and second stop edges 32 are symmetrically arranged within the mounting groove 21. The second wedge-shaped members 4 are connected as a single unit, and a gap is provided between the two first wedge-shaped members 3. The first elastic member 5 is a spring, with one end abutting against the second stop edge 32 and the other end abutting against the second wedge-shaped member 4. Specifically, both the second stop edge 32 and the second wedge-shaped member 4 are provided with recesses for inserting the first elastic member 5, facilitating the installation and positioning of the first elastic member 5.
[0030] Example 2
[0031] Please see Figure 3 and Figure 4 A sliding gap elimination structure includes a fixing member 1, a sliding member 2, a first wedge member 3, a second wedge member 4, and a first elastic member 5. The sliding member 2 is slidably mounted on the fixing member 1. The sliding member 2 is provided with a mounting groove 21 facing the fixing member 1. The first wedge member 3 and the second wedge member 4 are movably fitted into the mounting groove 21. One end of the first wedge member 3 is provided with a first stop 31, and the other end is provided with a second stop 32. The middle part of the first wedge member 3 is provided with a first wedge surface 33. The second wedge member 4 is movably mounted into the mounting groove 21. The second wedge member 4 is provided with a second wedge surface 41. The first wedge surface 33 can fit tightly with the second wedge surface 41. The first elastic member 5 is installed between the second wedge member 4 and the second stop 32. The first elastic member 5 can make the second wedge surface 41 fit with the first wedge surface 33. A limiting edge 22 is provided in the mounting groove 21. The limiting edge 22 can abut against the first stop 31.
[0032] In this embodiment, a second elastic element 7 is also included. The second elastic element 7 can press the first wedge 3 onto the fixing element 1. The inward tightening force of the second elastic element 7 is used to offset most of the outward opening force of the first wedge 3, preventing the opening force of the second elastic element 7 from being too large and causing the gap to be difficult to eliminate under the action of the first elastic element 5, thereby improving reliability.
[0033] In this embodiment, two sets of first wedge-shaped members 3, second wedge-shaped members 4, first elastic members 5, second elastic members 7, and second retaining edges 32 are included. These two sets of first wedge-shaped members 3, second wedge-shaped members 4, first elastic members 5, second elastic members 7, and second retaining edges 32 are symmetrically arranged within the mounting groove 21, and the second wedge-shaped members 4 are connected as a single unit. A gap is provided between the two first wedge-shaped members 3. Specifically, the fixing member 1 is cylindrical, and the sliding member 2 is slidably fitted onto the fixing member 1. Both the first wedge-shaped members 3 and 4 are annular structures with notches. The first wedge-shaped member 3 is fitted onto the fixing member 1, and the second wedge-shaped member 4 is fitted onto the first wedge-shaped member 3. The second elastic member 7 is annular and fitted onto the outer wall of the first wedge-shaped member 3. Both the second retaining edge 32 and the first elastic member 5 are annular, and the second retaining edge 32 abuts against one end of the first elastic member 5. In this embodiment, both the first elastic element 5 and the second elastic element 7 can be O-rings. The inner diameter of the first elastic element 5 is smaller, which can tighten the first wedge-shaped element 3 inward and fit it onto the fixing element 1.
[0034] The working principles of the two embodiments described above are as follows:
[0035] 1. When the slider 2 is stationary, the two first elastic members 5 press the second stop 32 of the first wedge 3 and the corresponding second wedge 4, causing the first wedge surface 33 and the second top surface to move relative to each other in the pressing phase. The first wedge 3 then moves toward the fixed member 1, thereby eliminating the gap between the slider 2 and the fixed member 1, making the fit tighter, and enabling the second stop 32 and the limiting edge 22 to abut against each other.
[0036] 2. When the slider 2 moves in one direction along the fixed member 1 (taking the leftward movement as shown in the figure as an example), the first wedge A34 on the side of the movement direction remains in motion under the action of the corresponding limiting edge 22, while the second wedge 4 is briefly stationary relative to the slider 2 and moves synchronously; at the same time, the first wedge B35 on the other side experiences movement lag under the action of the friction of the fixed member 1, causing the first wedge surface 33 of the first wedge B35 to separate from the corresponding second wedge surface 41, and the first elastic member B52 is squeezed; due to the compression of the first elastic member B52, the second wedge 4 moves slightly in the opposite direction to the movement direction (although the first elastic member A51 is squeezed, it is not enough to eliminate the gap between the first wedge surface 33 and the second wedge surface 41 of the first wedge A34), and finally the second wedge surface of the second wedge 4 separates from the first wedge surface 33 of the first wedge A34. After the above process, the two wedge surfaces are separated from each other, causing the pre-pressure to be released (gap to appear) between the two first wedges 3 and the fixed part 1, thus reducing the sliding friction resistance between the first wedges 3 and the fixed part 1 and achieving low-resistance sliding.
[0037] The above description is a detailed description of the preferred embodiments of the present utility model. However, the embodiments are not intended to limit the scope of the patent application of the present utility model. All equivalent changes or modifications made under the technical spirit of the present utility model should fall within the patent scope covered by the present utility model.
Claims
1. A sliding gap elimination structure, characterized in that: The device includes a fixing component, a sliding component, a first wedge, a second wedge, and a first elastic component. The sliding component is slidably mounted on the fixing component. The sliding component has a mounting groove facing the fixing component. The first and second wedges are movably fitted into the mounting groove. One end of the first wedge has a first stop edge, and the other end has a second stop edge. The middle of the first wedge has a first wedge surface. The second wedge is movably mounted in the mounting groove. The second wedge has a second wedge surface. The first wedge surface can be tightly fitted with the second wedge surface. The first elastic component is installed between the second wedge and the second stop edge, and the first elastic component can make the second wedge surface fit against the first wedge surface. A limiting edge is provided in the mounting groove, and the limiting edge can abut against the first stop edge.
2. The sliding gap elimination structure according to claim 1, characterized in that: It also includes a semi-locking nut, wherein the first wedge has an elongated hole, the semi-locking nut passes through the elongated hole and is fixedly connected to the sliding member, and the first wedge is movable relative to the sliding member.
3. The sliding gap elimination structure according to claim 2, characterized in that: It includes two sets of first wedges, second wedges, first elastic elements, and second stop edges. The two sets of first wedges, second wedges, first elastic elements, and second stop edges are symmetrically arranged in the mounting groove, and the second wedges are connected as a whole. A gap is provided between the two first wedges.
4. The sliding gap elimination structure according to claim 3, characterized in that: The first elastic element is a spring, one end of which abuts against the second stop edge, and the other end abuts against the second wedge-shaped element.
5. The sliding gap elimination structure according to claim 1, characterized in that: It also includes a second elastic element that allows the first wedge to press against the fixing element.
6. The sliding gap elimination structure according to claim 5, characterized in that: It includes two sets of first wedges, second wedges, first elastic elements, second elastic elements, and second stop edges. The two sets of first wedges, second wedges, first elastic elements, second elastic elements, and second stop edges are symmetrically arranged in the mounting groove, and the second wedges are connected as a whole. A gap is provided between the two first wedges.
7. The sliding gap elimination structure according to claim 5, characterized in that: The fixing member is cylindrical, and the sliding member is slidably fitted onto the fixing member. The first wedge and the second wedge are both annular structures with notches. The first wedge is fitted onto the fixing member, and the second wedge is fitted onto the first wedge. The second elastic member is annular and is fitted onto the outer wall of the first wedge.
8. The sliding gap elimination structure according to claim 5, characterized in that: Both the second stop and the first elastic element are annular, and the second stop abuts against one end of the first elastic element.