Movable sliding rail clearance eliminating structure
By adopting an inverted "T" groove on the upper rail and a lower rail structure in the slide rail, along with cantilever hinged bearings and springs, the problems of difficult slide rail layout and poor mass production have been solved, achieving a compact design and smooth operation of the slide rail, and improving the slide rail's backlash elimination performance and competitiveness.
Patent Information
- Application Number
- CN202520370000.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-03-05
AI Technical Summary
In existing technologies, the fixed gap elimination block solution is not conducive to the mass production and smoothness of the slide rail, while the movable bearing gap elimination solution is difficult to arrange, especially when the lower rail has a folded edge, which limits space and affects the application prospects.
It adopts an inverted "T" groove on the upper rail and a lower rail structure. The cantilever is hinged to the bearing by a pin and equipped with a spring. The bearing is arranged vertically in the groove and the rotating shaft is arranged horizontally. The cantilever and connecting rod are reasonably designed. The spring is arranged in the upper rail to form a large gap-eliminating force. The bearing chamfer matches the inclined surface of the lower rail to eliminate gaps in multiple directions.
It achieves a compact structure, good gap elimination performance, low noise, and smooth operation, making it suitable for seat slide rails, reducing weight and improving the competitiveness of slide rails.
Smart Images
Figure CN223720717U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to slide rail technical field, especially relate to a movable slide rail gap elimination structure. BACKGROUND
[0002] The long slide rail of the automobile seat usually adopts the mode that the upper rail carries the bearing to roll in the lower rail to realize the long stroke sliding of the slide rail, and the sliding mode needs to be configured with the gap elimination structure to avoid the problems such as shaking and abnormal sound of the slide rail.
[0003] The fixed gap elimination block scheme is greatly related to the sliding force and abnormal sound of the slide rail and the matching size of the slide rail, and the corresponding specification of the gap elimination block needs to be adapted according to the matching size of the slide rail, so it is not conducive to the mass production of the slide rail, and the smoothness of the slide rail is also poor.
[0004] The mass production and smoothness of the movable bearing gap elimination scheme are far superior to the fixed gap elimination block scheme, but the technical difficulty of the scheme lies in how to arrange, because the scheme needs to include the gap elimination bearing, the structure that can make the bearing movable and the structure that provides the restoring force, and the rail type of the slide rail needs to be arranged compactly to improve the competitiveness, which greatly limits the application prospect of the scheme. Especially when the lower rail has a folded edge to ensure the peeling strength of the slide rail (high-strength steel), the arrangement space will be further compressed, and the difficulty will be further increased. SUMMARY
[0005] The utility model aims at providing a movable slide rail gap elimination structure which is simple in structure, good in gap elimination performance, smooth in operation and small in abnormal sound.
[0006] The utility model is solved by the following way:
[0007] A movable slide rail gap elimination structure, comprising an upper rail and a lower rail with an inverted "T"-shaped groove, the lower part of the upper rail is hingedly connected with a roller which can roll along the lower bottom of the "T"-shaped groove of the lower rail, the two side surfaces of the upper rail in the "T"-shaped groove are respectively spaced apart by a rotating shaft and correspondingly hingedly connected with a cantilever, the middle part of the cantilever is hingedly connected with a bearing by a pin shaft, and the end part is provided with a spring which pulls the bearing towards the upper wall in the "T"-shaped groove to eliminate the movement gap between the upper rail and the lower rail.
[0008] As a further optimization of the above technical solution, the cantilever and the bearing on the two side surfaces of the upper rail in the "T"-shaped groove are correspondingly arranged, the end parts of the cantilevers correspondingly arranged on the two side surfaces of the upper rail are connected into an integral structure by a connecting rod, one end of the spring is hung on the middle part of the connecting rod, and the other end is hung on the upper rail.
[0009] As a further optimization of the above technical solution, the distance from the pin shaft on the cantilever to the rotating shaft is less than the distance from the pin shaft to the end part.
[0010] As a further optimization of the above technical solutions, the upper rail is formed by first outwardly folding and then upwardly folding the lower end of the two side walls of the inverted "U" shaped body, the lower rail is formed by first inwardly folding and then downwardly folding the upper end of the two side walls of the "U" shaped body, the two side walls, the inwardly folded edge and the downwardly folded edge of the lower rail form a sliding groove, the upwardly folded edge of the upper rail is slidably arranged in the sliding groove of the lower rail, and the roller is hinged to the outer surface of the upwardly folded edge of the upper rail and abuts against the bottom wall of the lower rail.
[0011] As a further optimization of the above technical solutions, the corner formed by the two side walls and the inwardly folded edge of the lower rail of the "U" shaped body is provided with an inclined surface, and the corresponding position of the bearing matched with the inclined surface of the lower rail is provided with an inclined chamfer.
[0012] As a further optimization of the above technical solutions, the outwardly folded edge of the upper rail is provided with an upwardly recessed groove, the connecting rod is arranged at the recessed groove, and the height of the recessed groove is adapted to the space for rotating the connecting rod around the rotating shaft under the spring tension.
[0013] As a further optimization of the above technical solutions, the connecting rod is arranged at the recessed groove, the middle part of the connecting rod at the recessed groove is provided with a spring seat, one end of the spring is hung on the spring seat, and the other end of the spring is hung on the hanging part of the top wall of the inverted "U" shaped body of the upper rail.
[0014] As a further optimization of the above technical solutions, the top wall of the inverted "U" shaped body of the upper rail is provided with through holes at intervals, the top wall between the two through holes is concave downward to form the hanging part, and the other end of the spring is hung on the hanging part.
[0015] As a further optimization of the above technical solutions, the cantilever is plate-shaped, the rotating surface of the plate-shaped cantilever is parallel to the outer side surface of the upwardly folded edge of the upper rail, and the rotating surface of the bearing is parallel to the outer side surface of the upwardly folded edge of the upper rail.
[0016] As a further optimization of the above technical solutions, the rotating shaft is welded to the outer side surface of the upwardly folded edge of the upper rail, and the cantilever is hinged to the rotating shaft.
[0017] Compared with the prior art, the utility model has the advantages of:
[0018] 1、The vertical arrangement of the bearing in the sliding groove can save the space in the width direction of the sliding rail, the volume of the locking pin lower rail and the overall weight.
[0019] 2. The rotating shaft is arranged horizontally, which is convenient for arranging the upper rail body, pin shaft and cantilever, and the rotating shaft of the left-right gap elimination structure can be coaxial, thereby realizing that one spring drives two gap elimination structures, and the spring arranged in the upper rail can use a larger spring to form a larger gap elimination force, so that the mechanism moves stably and has small abnormal sound.
[0020] 3. The cantilever of the bearing support is below the upper rail folded edge, the spring can be arranged in the sliding rail, and the corresponding gap elimination structures on the left and right sides are driven, the structure design is reasonable and ingenious, and conforms to the mechanical principle.
[0021] 4. The distance L1 from the pin shaft on the cantilever to the rotating shaft is less than the distance L2 from the pin shaft to the end, the bearing gap elimination force can be effectively enlarged (limited by the arrangement space, and the limit tension of the spring is usually less than the bearing gap elimination force), at this time, the elastic block assistance is not needed, and the stability of the gap elimination force is high.
[0022] 5. The bearing chamfer cooperates with the inclined surface of the lower rail, so that the direction of the reaction force of the lower rail on the bearing is not only vertically downward, but also the gaps in the up-down and left-right directions are eliminated.
[0023] 6. The bearing is installed in close contact with the upper rail body by means of rivets, and the stiffness of the gap elimination structure is improved.
[0024] 7. The structure design is reasonable, the gap elimination force is large, the gap elimination performance is good, the abnormal sound is small, the operation is stable, and the gap elimination structure is suitable for the seat sliding rail. DRAWINGS
[0025] Figure 1 is a perspective view of the utility model.
[0026] Figure 2 is a perspective view of the upper rail of the utility model.
[0027] Figure 3 is a structure view between the spring and the upper and lower rails of the utility model.
[0028] Figure 4 is a perspective view of the spring, cantilever and connecting rod bearing of the utility model.
[0029] Figure 5 is Figure 2 the A part of the enlarged view.
[0030] Figure 6 is Figure 2 the B part of the enlarged view.
[0031] Figure 7 is a perspective view of the link structure of the rotating shaft. DETAILED DESCRIPTION
[0032] The utility model will be further described below with specific embodiments in combination with the drawings, referring to Figures 1-7 :
[0033] A movable sliding rail clearance eliminating structure, including upper rail 20 and lower rail 10 with inverted " T " type groove, the lower roller 11 of articulated upper rail 20 can roll along the lower bottom 12 of " T " type groove of lower rail 10, the two side surfaces of upper rail 20 in " T " type groove are spaced apart and correspondingly articulated with cantilever 32 along the length direction, the middle part of cantilever 32 is articulated with bearing 31 through pin shaft 34, and the end is provided with spring 40 for pulling bearing 31 to upper wall 15 in " T " type groove to eliminate the movement clearance between upper rail 20 and lower rail 10.
[0034] As a further optimization of the above technical solution, the cantilever 32 and the bearing 31 on the two side surfaces of the upper rail 20 in the "T" type groove are correspondingly arranged, the cantilevers 32 correspondingly arranged on the two side surfaces of the upper rail 20 are connected into an integral structure through the connecting rods 33, one end of the spring 40 is hung on the middle part of the connecting rod 33, and the other end is hung on the upper rail 20.
[0035] As a further optimization of the above technical solution, the distance L1 from the pin shaft 34 to the rotating shaft 30 on the cantilever 32 is less than the distance L2 from the pin shaft 34 to the end.
[0036] As a further optimization of the above technical solution, the upper rail 20 is formed by first folding outward 23 and then upward 25 at the lower end of the two side walls 22 of the inverted "U" type body, the lower rail 10 is formed by first folding inward 15 and then downward 14 at the upper end of the two side walls 13 of the "U" type body, the two side walls 13, the inner folding edge 15 and the lower edge 14 of the lower rail 10 form a sliding groove, the upper edge 25 of the upper rail 20 slides in the sliding groove of the lower rail 10, the roller 11 is articulated on the outer surface of the upper edge 25 of the upper rail 20 and abuts against the bottom wall 12 of the lower rail 10, and the cantilever 32 is articulated on the outer surface of the upper edge 25 of the upper rail 20.
[0037] As a further optimization of the above technical solution, the corners formed by the two side walls 13 and the inner folding edge 15 of the "U" type body of the lower rail 10 are each provided with an inclined surface 16, and the corresponding position of the bearing 31 matched with the inclined surface 16 of the lower rail 10 is provided with an inclined chamfer 36.
[0038] As a further optimization of the above technical solution, an upward recess 23 is provided at the outer folding edge 24 of the upper rail 20, the connecting rod 33 is arranged at the recess 23, and the recess 23 has a height suitable for the space of the connecting rod 33 rotating around the rotating shaft 30 under the tension of the spring 40.
[0039] As a further optimization of the above technical solutions, the connecting rod 33 is arranged at the groove 23, and a spring seat 35 is arranged at the middle part of the connecting rod 33 at the groove 23, one end 42 of the spring 40 is hung on the spring seat 35, and the other end 41 is hung on the hanging part 26 of the top wall of the inverted U-shaped body of the upper rail 20, and the arrangement of the spring seat 35 not only facilitates force transmission, but also reduces friction and noise between movable pairs.
[0040] As a further optimization of the above technical solutions, the top wall 21S2 of the inverted U-shaped body of the upper rail 20 is provided with through holes 27, and the top wall is concave between the two through holes 27 to form the hanging part 26, and the other end 31 of the spring 40 is hung on the hanging part 26.
[0041] As a further optimization of the above technical solutions, the cantilever 32 is plate-shaped, the rotation surface of the plate-shaped cantilever 32 is parallel to the outer side surface of the upper edge 25 of the upper rail 20, and the rotation surface of the bearing 31 is parallel to the outer side surface of the upper edge 25 of the upper rail 20.
[0042] As a further optimization of the above technical solutions, the rotating shaft 30 is welded to the outer side surface of the upper edge 25 of the upper rail 20, and the cantilever 32 is hinged to the rotating shaft 30.
[0043] The above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still make simple replacements or modifications to the technical solutions or technical features recorded in the foregoing embodiments by similar technologies, and these simple replacements or modifications do not make the essence of the corresponding technical solutions deviate from the spirit and essence of the technical solutions of the embodiments of the present application, and still within the protection scope of the present application.
Claims
1. A movable slide rail gap-eliminating structure, comprising an upper rail and a lower rail with an inverted "T"-shaped groove, wherein a roller hinged to the lower part of the upper rail can roll along the bottom of the "T"-shaped groove of the lower rail, characterized in that: The two side surfaces of the upper rail in the "T" groove are spaced apart by a rotating shaft along the length direction and correspondingly hinged with cantilevers, the middle part of the cantilever is hinged with a bearing by a pin shaft, and the end part is provided with a spring for pulling the bearing to the upper wall in the "T" groove to eliminate the movement gap between the upper rail and the lower rail.
2. The movable slide gap elimination structure of claim 1, wherein: The cantilevers and bearings on the two side surfaces of the upper rail in the "T" groove are correspondingly arranged, the end parts of the cantilevers correspondingly arranged on the two side surfaces of the upper rail are connected into an integral structure by a connecting rod, one end of the spring is hung on the middle part of the connecting rod, and the other end is hung on the upper rail.
3. The movable slide gap elimination structure of claim 1, wherein: The distance from the pin shaft to the rotating shaft of the cantilever is less than the distance from the pin shaft to the end part.
4. The movable slide gap elimination structure of claim 1, wherein: The upper rail is formed by first outwardly folding and then upwardly folding the lower end of the two side walls of an inverted "U" shaped body, the lower rail is formed by first inwardly folding and then downwardly folding the upper end of the two side walls of a "U" shaped body, the two side walls, the inwardly folded edge and the downwardly folded edge of the lower rail form a sliding groove, the upwardly folded edge of the upper rail is slidably arranged in the sliding groove of the lower rail, the roller is hinged to the outer surface of the upwardly folded edge of the upper rail and abuts against the bottom wall of the lower rail, and the cantilever is hinged to the outer surface of the upwardly folded edge of the upper rail.
5. The movable slide gap elimination structure of claim 4, wherein: Inclined surfaces are arranged at the corners formed by the two side walls and the inwardly folded edge of the "U" shaped body of the lower rail, and the corresponding positions of the bearings matched with the inclined surfaces of the lower rail are provided with inclined chamfers.
6. The movable slide gap elimination structure of claim 4, wherein: An upward groove is arranged at the outwardly folded edge of the upper rail, the connecting rod is arranged at the groove, and the height of the groove is adapted to the space for rotating the connecting rod around the rotating shaft under the pulling force of the spring.
7. The movable slide gap elimination structure of claim 4, wherein: The connecting rod is arranged at the groove, a spring seat is arranged at the middle part of the connecting rod at the groove, one end of the spring is hung on the spring seat, and the other end is hung on the hanging part of the top wall of the inverted "U" shaped body of the upper rail.
8. The movable slide gap elimination structure of claim 7, wherein: The top wall of the inverted "U" shaped body of the upper rail is provided with through holes, the top wall between the two through holes is concave downward to form the hanging part, and the other end of the spring is hung on the hanging part.
9. The movable slide gap elimination structure of claim 4, wherein: The cantilever is plate-shaped, the rotating surface of the plate-shaped cantilever is parallel to the outer side surface of the upwardly folded edge of the upper rail, and the rotating surface of the bearing is parallel to the outer side surface of the upwardly folded edge of the upper rail.
10. The movable slide gap elimination structure of claim 1, wherein: The rotating shaft is welded to the outer side surface of the upwardly folded edge of the upper rail, and the cantilever is hinged to the rotating shaft.