Lead screw long sliding rail gap eliminating structure
By employing an inverted 'T' groove and elastic bearing bracket design in the automotive seat slide rail, the problems of insufficient mass production capability and smoothness of the slide rail in the existing technology are solved, and the stability and gap elimination effect of the slide rail are achieved.
Patent Information
- Application Number
- CN202520267728.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2035-02-19
AI Technical Summary
Existing fixed and movable gapless structures for long slide rails of automotive seats have shortcomings in terms of mass production and smoothness, especially in terms of structural complexity and spatial layout difficulties.
The design employs a lower and upper rail with inverted 'T' grooves, utilizing bearings and tension springs with elastic rolling contact. Through 'I' and '7' shaped bearing supports, the gap-eliminating force is converted into reaction forces in the vertical and horizontal directions. Combined with the arc-shaped chamfer and positioning shaft design, the design achieves bearing stability and space utilization efficiency.
It achieves a simple and spatially reasonable gap-eliminating structure, improves the mass production and smoothness of the slide rail, reduces abnormal noise and shaking, and is suitable for seat slide rails.
Smart Images
Figure CN223467033U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of seat accessories, especially relates to a long slide rail gap elimination structure of screw rod for seat. BACKGROUND
[0002] The long slide rail gap elimination structure of screw rod for seat adopts the mode that the upper rail carries the bearing to roll in the lower rail to realize the long stroke sliding of the upper rail, and the sliding mode needs to be equipped with the gap elimination structure to avoid the problems such as shaking and abnormal sound of the slide rail.
[0003] The commonly used fixed gap elimination block scheme has great relationship between the sliding force of the slide rail and the abnormal sound 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 that the mass production of the slide rail is not facilitated, and the smoothness of the slide rail is not good.
[0004] The mass production and smoothness of the movable gap elimination scheme are far superior to those of the fixed gap elimination block scheme, but the technical difficulty of the scheme lies in the structure layout, because the structure is complex, more components are arranged in the limited slide rail guide groove space, and the energy consumption of the gap elimination block is required, and the difficulty is great. SUMMARY
[0005] The utility model discloses a movable bearing gap elimination long slide rail gap elimination structure with simple structure and good performance.
[0006] The utility model discloses a movable bearing gap elimination long slide rail gap elimination structure with simple structure and good performance.
[0007] A long slide rail gap elimination structure of screw rod, including upper rail and the lower rail of the " T " type groove of inverting, the lower part setting of the upper rail gyro wheel can roll in the " T " type groove of the lower rail, the two side surfaces of the upper rail in the " T " type groove are respectively along the length direction interval and set up the bearing of eliminating the gap that can with the inner upper wall of the " T " type groove elastic rolling abutment.
[0008] As the further optimization of the above technical scheme, the two side surfaces of the upper rail in the " T " type groove are hinged with the " one " type bearing support along the length direction of the upper rail, the outer side of one end of the " one " type bearing support is hinged with the bearing, the other end is hung with the first tension spring, the other end of the first tension spring is hung on the inner side surface of the lower rail upper arm in the " T " type groove, so that the bearing has the upward movement trend to make the bearing elastic rolling abutement.
[0009] As the further optimization of the above technical scheme, the two side surfaces of the upper rail in the "T" type groove are provided with "7" type bearing supports at intervals along the length direction, the corners of the "7" type bearing supports are hinged to the two side surfaces of the upper rail in the "T" type groove through pin shafts, the outer side of the upper arm end of the "7" type bearing support is hinged with the bearing, one end of the second tension spring is hung on the lower arm end of the "7" type bearing support, and the other end of the second tension spring is hung on the inner side surface of the upper arm of the lower rail in the "T" type groove which always has an upward movement trend.
[0010] As the further optimization of the above technical scheme, the corners of the inner side wall and the inner upper arm of the inverted "T" type groove are provided with arc chamfers, and the bearings corresponding to the arc chamfers are provided with arc chamfers matched with the arc chamfers, so that the "T" type groove simultaneously applies downward and inward reaction forces to eliminate the gap of the bearings and the upper rail.
[0011] As the further optimization of the above technical scheme, the outer side of the upper arm end of the "7" type bearing support is welded with a positioning shaft, and the bearing is hinged on the positioning shaft.
[0012] As the further optimization of the above technical scheme, the upper rail in the "T" type groove has a horizontal upper arm, the two sides of the upper arm are provided with side arms extending vertically downward, the positioning shaft is perpendicular to the outer side surface of the side arm of the upper rail, and the rotating surface of the bearing is parallel to the outer side surface of the side arm of the upper rail.
[0013] As the further optimization of the above technical scheme, the bearing is sleeved on the positioning shaft and is hinged on the positioning shaft through riveting of the outer end of the positioning shaft to limit the axial movement of the bearing.
[0014] As the further optimization of the above technical scheme, the side arm of the upper rail is hinged with a rolling bearing at intervals along the length direction of the upper rail, and the rolling bearing is in rolling abutment with the groove bottom of the "T" type groove of the lower rail.
[0015] As the further optimization of the above technical scheme, the two side surfaces of the upper rail in the "T" type groove are provided with hook type suspension grooves or suspension holes at intervals along the length direction, and the other end of the second tension spring is hung on the hook type suspension grooves or suspension holes.
[0016] As the further optimization of the above technical scheme, the two side surfaces of the upper rail in the "T" type groove are welded with the pin shafts at intervals along the length direction, the corners of the "7" type bearing support are hinged on the pin shafts, and the pin shafts on the outer side of the "7" type bearing support are assembled with thrust nuts for limiting the axial movement of the "7" type bearing support.
[0017] Compared with the prior art, the utility model has the advantages of:
[0018] 1. The bearing vertical arrangement can save the width direction space of the slide rail.
[0019] 2. The pin shaft of the hinged bearing is arranged horizontally, facilitating the arrangement of the upper rail body and the bearing support.
[0020] 3. The utility model makes full use of the height of the lower rail inner cavity, arranges the tension spring in the front and rear directions, and converts the gap elimination force into the up and down directions through the bearing support.
[0021] 4. The arc-shaped chamfer of the bearing outer corner is matched with the arc-shaped chamfer of the lower rail, so that the direction of the reaction force of the lower rail on the bearing is not vertically downward, but two reaction components of partial vertical downward and partial horizontal inward, which can eliminate the movement gap in the up and down and left and right directions.
[0022] 5. The bearing is riveted and connected through the positioning shaft, tightly abuts the upper rail body, improves the gap elimination structure rigidity, and eliminates the gap elimination force without being transmitted to the upper rail body through the bearing support. In addition, the "I" type bearing support or the "7" type bearing support is limited in the axial movement through the thrust cap.
[0023] 6. The assembly and stability of the tension spring are better than those of the planar spiral tension spring, and the sensitivity to the matching size of the slide rail is far better than that of the elastic body structure.
[0024] 7. The "7" type bearing support is used to convert the horizontal tension of the tension spring into the vertical thrust of the gap elimination bearing, and the structure design is ingenious.
[0025] 8. The utility model has the advantages of simple structure, reasonable space layout, good gap elimination performance, and is suitable for the gap elimination structure of the seat slide rail. DRAWINGS
[0026] Figure 1 It is a perspective view of the utility model.
[0027] Figure 2 It is a front view of the utility model.
[0028] Figure 3 It is an A-A sectional view of Figure 2 .
[0029] Figure 4 It is a B part enlarged view of Figure 3 .
[0030] Figure 5 It is a perspective view of the structure near the pin shaft of the utility model.
[0031] Figure 6It is the three-dimensional schematic view of the structure near the tension spring of the utility model. DETAILED DESCRIPTION
[0032] The utility model will be further described in conjunction with the specific embodiments of the drawings, see Figures 1-6 :
[0033] A screw rod long slide rail clearance elimination structure, including upper rail 20 and the lower rail 10 of inverted T type groove 11, the lower roller of upper rail 20 can roll in the T type groove 11 of lower rail 10, the two sides of upper rail 20 in T type groove 11 are respectively spaced apart along the length direction and are provided with the clearance elimination bearing 32 that can be elastically rolled and contacted with the inner upper wall of T type groove 11.
[0034] As the further optimization of the above technical scheme, the two sides of the upper rail in the T type groove are hingedly provided with a "one" type bearing bracket along the length direction of the upper rail, one end of the "one" type bearing bracket is hingedly provided with the bearing, and the other end of the "one" type bearing bracket is hung with a first tension spring, and the other end of the first tension spring is hung on the inner side surface of the lower rail upper arm in the T type groove, so that the bearing has a upward movement trend and is elastically rolled and contacted on the inner side surface of the lower rail upper arm in the T type groove.
[0035] As the further optimization of the above technical scheme, the two sides of the upper rail 20 in the T type groove 11 are provided with a "7" type bearing bracket 30 along the length direction, the corner of the "7" type bearing bracket 30 is hingedly connected to the two sides of the upper rail 20 in the T type groove 11 through a pin shaft 34, the outer side of the end of the upper arm 36 of the "7" type bearing bracket 30 is hingedly provided with the bearing 32, one end of the second tension spring 38 is hung on the end of the lower arm 37 of the "7" type bearing bracket 30, and the other end of the second tension spring 38 is hung on the inner side surface 14 of the lower rail 10 upper arm in the T type groove 11, so that the bearing 32 has a upward movement trend.
[0036] As the further optimization of the above technical scheme, the corner of the inner side wall and the inner upper arm of the inverted T type groove 11 is provided with an arc chamfer 13, and the bearing 32 corresponding to the arc chamfer 13 is provided with an arc chamfer 33 matched with the arc chamfer 13, so that the T type groove 11 simultaneously applies downward and inward reaction force to the bearing 32 and the upper rail 20 to eliminate the clearance.
[0037] As the further optimization of the above technical scheme, the end of the upper arm 36 of the "7" type bearing bracket 32 is welded with a positioning shaft 31, and the bearing 32 is hingedly connected to the positioning shaft 31.
[0038] As further optimization of the above technical solutions, the upper rail 20 in the "T" shaped slot 11 has a horizontal upper arm 21, both sides of the upper arm 21 are provided with a vertical downward extending side arm 22, the positioning shaft 31 is perpendicular to the outer side of the side arm 22 of the upper rail 20, and the rotating surface of the bearing 32 is parallel to the outer side of the side arm 22 of the upper rail 20.
[0039] As further optimization of the above technical solutions, the bearing 32 is sleeved on the positioning shaft 31 and is hinged on the positioning shaft 31 by riveting the outer end of the positioning shaft 31 to limit the axial movement of the bearing 32.
[0040] As further optimization of the above technical solutions, the side arm 22 of the upper rail 20 is hingedly provided with a rolling bearing 40 along the length direction of the upper rail 20, and the rolling bearing 40 is in rolling abutment with the groove bottom of the "T" shaped slot 11 of the lower rail 10.
[0041] As further optimization of the above technical solutions, both side surfaces of the upper rail 20 in the "T" shaped slot 11 are provided with a hook type suspension slot 12 or a suspension hole along the length direction, and the other end of the second tension spring 38 is suspended on the hook type suspension slot 12 or the suspension hole.
[0042] As further optimization of the above technical solutions, the side arm 22 of the upper rail 20 in the "T" shaped slot 11 is welded with the pin shaft 34 along the length direction, the corner of the "7" shaped bearing support 32 is hingedly provided with the pin shaft 34, and the pin shaft 35 outside the "7" shaped bearing support 32 is provided with a thrust cap 35 for limiting the axial movement of the "7" shaped bearing support 32.
[0043] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it; 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 replacement or modification to the technical solutions or technical features recorded in the foregoing embodiments by similar technology, and these simple replacement or modification 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 screw rod long slide rail gap elimination structure, comprising an upper rail and a lower rail with an inverted "T"-shaped slot, wherein a roller provided at the lower portion of the upper rail can roll in the "T"-shaped slot of the lower rail, characterized in that: The two side surfaces of the upper rail in the "T"-shaped groove are respectively provided with bearings for eliminating gaps at intervals along the length direction and can be elastically rolled against the inner upper wall of the "T"-shaped groove.
2. The long slide rail gap elimination structure of claim 1, wherein: The two side surfaces of the upper rail in the "T"-shaped groove are hinged with "I"-shaped bearing brackets at intervals along the length direction of the upper rail. The outer side of one end of the "I"-shaped bearing bracket is hinged with the bearing, and the other end is suspended with a first tension spring. The other end of the first tension spring is hung on the inner side surface of the upper arm of the lower rail in the "T"-shaped groove so that the bearing always has a tendency to move upward so that the bearing elastically rolls and abuts against the inner side surface of the upper arm of the lower rail in the "T"-shaped groove.
3. The long slide rail gap elimination structure of claim 1, wherein: "7"-shaped bearing brackets are arranged at intervals on both sides of the upper rail in the "T"-shaped groove along the length direction. The corners of the "7"-shaped bearing bracket are hinged to the two side surfaces of the upper rail in the "T"-shaped groove through pins. The outer side of the upper arm end of the "7"-shaped bearing bracket is hinged with the bearing. One end of the second tension spring is suspended on the lower arm end of the "7"-shaped bearing bracket, and the other end of the second tension spring is suspended on the inner side surface of the upper arm of the lower rail in the "T"-shaped groove, which always causes the bearing to move upward.
4. The long slide rail gap elimination structure of claim 2 or 3, wherein: An arc chamfer is provided at the corner between the inner side wall of the inverted "T"-shaped slot and the inner upper arm, and an arc chamfer matching the arc chamfer is provided on the bearing corresponding to the arc chamfer, so that the "T"-shaped slot applies a downward and inward reaction force to eliminate the gap on the bearing and the upper rail at the same time.
5. The long slide rail gap elimination structure of claim 3, wherein: A positioning shaft is welded to the outer side of the upper arm end of the "7"-shaped bearing bracket, and the bearing is hinged on the positioning shaft.
6. The long slide rail gap elimination structure of claim 5, wherein: The upper rail in the "T"-shaped groove has a horizontal upper arm, and side arms extending vertically downward are provided on both sides of the upper arm. The positioning axis is perpendicular to the outer side of the side arm of the upper rail, and the rotating surface of the bearing is parallel to the outer side of the side arm of the upper rail.
7. The long slide rail gap elimination structure of claim 5, wherein: The bearing sleeve is mounted on the positioning shaft and is hinged to the positioning shaft by riveting the outer end of the positioning shaft to limit the axial movement of the bearing.
8. The long slide rail gap elimination structure of claim 6, wherein: Rolling bearings are hinged at intervals on the side arms of the upper rail along the length direction of the upper rail, and the rolling bearings are in rolling contact with the bottom of the "T"-shaped groove of the lower rail.
9. The long slide rail gap eliminating structure of claim 3, wherein: Hook-type hanging grooves or hanging holes are arranged at intervals on both sides of the upper rail in the "T"-shaped groove along the length direction, and the other end of the second tension spring is hung on the hook-type hanging groove or hanging hole.
10. The long slide rail gap elimination structure of claim 3, wherein: The two side surfaces of the upper rail in the "T"-shaped groove are welded with the pins at intervals along the length direction. The corners of the "7"-shaped bearing bracket are hinged on the pins. The pins on the outer side of the "7"-shaped bearing bracket are equipped with thrust caps for limiting the axial movement of the "7"-shaped bearing bracket.