Sliding rail structure with high bearing capacity and high stability

Abstract

The utility model discloses a slide rail structure with high bearing capacity and high stability. The slide rail structure comprises a bracket, a lower rail, a middle rail and an upper rail, the upper rail comprises a first upper rail connecting piece and a second upper rail connecting piece; the second upper rail connecting pieces on the two sides vertically extend downwards and are horizontally bent inwards to form third upper rail connecting pieces. The lower rail comprises a first lower rail connecting piece and a second lower rail connecting piece; the second lower rail connecting pieces on the two sides vertically extend upwards and are horizontally bent inwards to form third lower rail connecting pieces. The middle rail comprises a first middle rail connecting piece and a second middle rail connecting piece; the second middle rail connecting pieces on the two sides vertically extend upwards and are horizontally bent outwards to form third middle rail connecting pieces. A fourth middle rail connecting piece is arranged between the second middle rail connecting piece and the first middle rail connecting piece; an upper bearing wheel set is arranged between the upper rail and the middle rail, and a lower bearing wheel set is arranged between the lower rail and the middle rail. The sliding rail structure has the advantages of being better in bearing performance and stability performance.

Description

Technical Field

[0001] The utility model belongs to the field of furniture, and particularly relates to a slide rail structure with high load-bearing capacity and high stability. Background Art

[0002] Normally, three-section concealed slide rails are used for drawers on the market to enable the drawers to be pulled outwards or retracted into the furniture. The main components of the three-section concealed slide rail include a lower rail, an upper rail, and a middle rail disposed between the two. For example, the utility model patent with the authorization announcement number CN208941351 U discloses "a three-section drawer slide rail structure". The three-section drawer slide rail structure includes an upper rail, a middle rail, and a lower rail. The upper rail is supported on the middle rail, and the middle rail is supported on the lower rail. The upper rail has a horizontal upper flat plate portion one. At both ends of the upper flat plate portion one, there are downwardly and vertically bent left vertical portion one and right vertical portion one. At the lower ends of the right vertical portion one and the left vertical portion one, there are inwardly extending rounded corners. The middle rail includes an upper flat plate portion two. At both ends of the upper flat plate portion two, there are downwardly bent upper left vertical portion two and right vertical portion two. The right vertical portion two is bent leftward to form a lower flat plate portion two, and the lower flat plate portion two is bent upward to form a lower left vertical portion two. An upper cage is wrapped around the upper end of the middle rail, the upper rail is wrapped outside the upper cage, a lower cage is wrapped around the lower end of the middle rail, and the supporting end of the lower rail is wrapped outside the lower cage. It has strong stability, smooth, flexible, smooth, and unobstructed sliding, and is not easy to shake.

[0003] However, the right vertical portion two of the middle rail of the above three-section drawer slide rail structure is a single vertical support plate structure, and its load-bearing performance is weak. When the load is too large, it is prone to bending deformation, thus affecting the normal use of the three-section drawer slide rail structure. Content of the Utility Model

[0004] In order to overcome the deficiencies existing in the prior art, the utility model provides a slide rail structure with high load-bearing capacity and high stability, and the load-bearing performance and stability of the slide rail structure are better.

[0005] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0006] A slide rail structure with high load-bearing capacity and high stability includes a bracket, a lower rail, a middle rail, and an upper rail disposed on the bracket. Among them,

[0007] The upper rail includes a horizontally arranged first upper rail connecting piece and second upper rail connecting pieces disposed on both sides of the first upper rail connecting piece. Among them, the second upper rail connecting pieces on both sides extend vertically downward and are horizontally bent inward to form horizontally extending third upper rail connecting pieces;

[0008] The lower rail includes a horizontally arranged first lower rail connecting piece and second lower rail connecting pieces disposed on both sides of the first lower rail connecting piece. Among them, the second lower rail connecting pieces on both sides extend vertically upward and are horizontally bent inward to form horizontally extending third lower rail connecting pieces;

[0009] The middle rail includes a horizontally arranged first middle rail connecting piece and second middle rail connecting pieces arranged on both sides of the first middle rail connecting piece. Among them, the second middle rail connecting pieces on both sides extend vertically upward and bend horizontally outward to form a horizontally extending third middle rail connecting piece; a fourth middle rail connecting piece is arranged between the second middle rail connecting pieces on both sides and the first middle rail connecting piece. The fourth middle rail connecting piece fits on the first middle rail connecting piece, one end of which is connected to the bottom of the second middle rail connecting piece, and the other end is arc-connected to the first middle rail connecting piece.

[0010] An upper load-bearing wheel set is arranged between the upper rail and the middle rail, and a lower load-bearing wheel set is arranged between the lower rail and the middle rail.

[0011] Preferably, the gap between the second middle rail connecting pieces on both sides of the middle rail and the first upper rail connecting piece forms a first upper installation gap; the gap between the third middle rail connecting piece and the third upper rail connecting piece forms a second upper installation gap; the gap between the first middle rail connecting piece, the first lower rail connecting piece and the second lower rail connecting pieces on both sides forms a first lower installation gap; the gap above the third lower rail connecting piece and the fourth middle rail connecting piece constitutes a second lower installation gap.

[0012] Preferably, the upper load-bearing wheel set includes an upper load-bearing frame, a first upper load-bearing component arranged in the middle of the upper load-bearing frame, and second and third upper load-bearing components arranged on the left and right sides of the upper load-bearing frame. Among them, the first upper load-bearing component is located in the first upper installation gap; the second and third upper load-bearing components are both located in the second upper installation gap.

[0013] Preferably, the first upper load-bearing component includes a first upper load-bearing roller arranged in the middle of the upper load-bearing frame. The first upper load-bearing roller is rotatably connected to the upper load-bearing frame. The upper end of the first upper load-bearing roller contacts the lower surface of the first upper rail connecting piece, and the lower end contacts the upper surface of the first middle rail connecting piece.

[0014] Preferably, the second upper load-bearing component includes second upper load-bearing rollers arranged on the left and right sides of the upper load-bearing frame; the second upper load-bearing rollers are rotatably connected to the left and right sides of the upper load-bearing frame, and the axial direction of the second upper load-bearing rollers is perpendicular to the axial direction of the first upper load-bearing roller; the wheel surfaces of the second upper load-bearing rollers respectively contact the outer side surface of the second middle rail connecting piece and the inner side surface of the second upper rail connecting piece.

[0015] Preferably, the third upper load-bearing component includes third upper load-bearing rollers arranged on the left and right sides of the upper load-bearing frame. The axial direction of the third upper load-bearing rollers is parallel to the axial direction of the first upper load-bearing rollers, and they are rotatably connected to the upper load-bearing frame. The upper end of the third upper load-bearing roller contacts the lower surface of the third middle rail connecting piece, and the lower end contacts the upper surface of the third upper rail connecting piece.

[0016] Preferably, the lower load-bearing wheel set includes a lower load-bearing frame, a first lower load-bearing component arranged in the middle of the lower load-bearing frame, and second and third lower load-bearing components arranged on the left and right sides of the lower load-bearing frame. Among them, the first lower load-bearing component is located within the first lower installation gap; both the second and third lower load-bearing components are located within the second lower installation gap;

[0017] Preferably, the first lower load-bearing component includes first lower load-bearing rollers arranged on the lower side of the lower load-bearing frame; there are multiple groups of the first lower load-bearing rollers, and the multiple groups of first lower load-bearing rollers are arranged in a straight line and are rotatably connected to the lower load-bearing frame; the upper end of the first lower load-bearing roller contacts the lower surface of the first middle rail connecting piece, and the lower end contacts the upper surface of the first lower rail connecting piece.

[0018] Preferably, the third lower load-bearing component includes second lower load-bearing rollers arranged on the lower side of the lower load-bearing frame; there are multiple groups of the second lower load-bearing rollers, and the multiple groups of second lower load-bearing rollers are arranged in a straight line and are rotatably connected to the lower load-bearing frame; the upper end of the second lower load-bearing roller contacts the lower surface of the third lower rail connecting piece, and the lower end contacts the upper surface of the fourth middle rail connecting piece.

[0019] Preferably, there are two groups of brackets, and the two groups of brackets are connected to the upper rail or the lower rail; when the upper rail is connected to the brackets, the lower rail is a movable rail; when the lower rail is connected to the brackets, the upper rail is a movable rail.

[0020] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0021] In the present invention, second middle rail connecting pieces are arranged on both sides of the first middle rail connecting piece. The second middle rail connecting pieces on both sides can provide double support for the upper rail, which can enhance the load-bearing capacity of the upper rail. At the same time, the second middle rail connecting pieces on both sides are not easily deformed and have better bending resistance, which can ensure the stable and reliable operation of the slide rail structure of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the slide rail structure with high load-bearing capacity and high stability of the present invention.

[0023] Figure 2Side view (cross-sectional view) of the first specific embodiment of the high-load and high-stability slide rail structure of the present utility model.

[0024] Figure 3 Exploded view of the high-load and high-stability slide rail structure of the present utility model.

[0025] Figure 4 Schematic diagram of the state when the high-load and high-stability slide rail structure of the present utility model is opened.

[0026] Figure 5 Schematic diagram of the state when the high-load and high-stability slide rail structure of the present utility model is closed.

[0027] Figure 6 Schematic diagram of the structure of the upper load-bearing wheel set and the first rack.

[0028] Figure 7 Schematic diagram of the structure of the upper load-bearing wheel set.

[0029] Figure 8 Schematic diagram of the structure of the lower load-bearing wheel set and the second rack.

[0030] Figure 9 Schematic diagram of the structure of the lower load-bearing wheel set.

[0031] Figure 10 Schematic diagram of the positions of the first upper installation gap, the second upper installation gap, the first lower installation gap, the second lower installation gap, and the third lower installation gap.

[0032] Figure 11 Cross-sectional view of the upper rail.

[0033] Figure 12 Cross-sectional view of the middle rail.

[0034] Figure 13 Cross-sectional view of the lower rail.

[0035] Figure 14 Side view (cross-sectional view) of the second specific embodiment of the high-load and high-stability slide rail structure of the present utility model. Specific Embodiment

[0036] The present utility model will be further described in detail below in conjunction with embodiments and the accompanying drawings, but the embodiments of the present utility model are not limited thereto.

[0037] Embodiment 1

[0038] See Figures 1 - 13 , the high-load and high-stability slide rail structure of the present utility model includes a bracket 1, a lower rail 4 provided on the bracket 1, a middle rail 3 provided on the lower rail 4, and an upper rail 2 provided on the middle rail 3.

[0039] See Figures 1 - 13 , the upper rail 2 includes a horizontally arranged first upper rail connecting piece 201 and second upper rail connecting pieces 202 arranged on both sides of the first upper rail connecting piece 201. Among them, the second upper rail connecting pieces 202 on both sides extend vertically downward and are horizontally bent inward to form a horizontally extending third upper rail connecting piece 203; among them, a chamfer or fillet is provided between the first upper rail connecting piece 201 and the second upper rail connecting piece 202; a chamfer or fillet is also provided between the second upper rail connecting piece 202 and the third upper rail connecting piece 203.

[0040] In this embodiment, the first upper rail connecting piece 201, the second upper rail connecting piece 202, and the third upper rail connecting piece 203 can be manufactured by an integral molding process.

[0041] See Figures 1 - 13 , the lower rail 4 includes a horizontally arranged first lower rail connecting piece 401 and second lower rail connecting pieces 402 arranged on both sides of the first lower rail connecting piece 401. Among them, the second lower rail connecting pieces 402 on both sides extend vertically upward and are horizontally bent inward to form a horizontally extending third lower rail connecting piece 403; in this embodiment, the extension length of the third lower rail connecting piece 403 on the left side is less than the extension length of the third lower rail connecting piece 403 on the right side;

[0042] In addition, a chamfer or fillet is provided between the first lower rail connecting piece 401 and the second lower rail connecting piece 402; a chamfer or fillet is also provided between the second lower rail connecting piece 402 and the third lower rail connecting piece 403.

[0043] In this embodiment, the first lower rail connecting piece 401, the second lower rail connecting piece 402, and the third lower rail connecting piece 403 can be manufactured by an integral molding process.

[0044] See Figures 1 - 13 , the middle rail 3 includes a horizontally arranged first middle rail connecting piece 301 and second middle rail connecting pieces 302 arranged on both sides of the first middle rail connecting piece 301. Among them, the second middle rail connecting pieces 302 on both sides extend vertically upward and are horizontally bent outward to form a horizontally extending third middle rail connecting piece 303; a fillet or chamfer is provided between the third middle rail connecting piece 303 and the second middle rail connecting piece 302; among them, fourth middle rail connecting pieces 304 are respectively provided between the second middle rail connecting pieces 302 on both sides and the first middle rail connecting piece 301. The fourth middle rail connecting piece 304 is attached to the first middle rail connecting piece 301, and one end of it is connected to the bottom of the second middle rail connecting piece 302 (a fillet or chamfer can be provided at the connection), and the other end is arc-connected to the first middle rail connecting piece 301.

[0045] In this embodiment, a first upper mounting gap A is formed by the gap between the second middle rail connecting pieces 302 on both sides of the middle rail 3 and the first upper rail connecting piece 201; a second upper mounting gap B is formed by the gap between the third middle rail connecting piece 303 and the third upper rail connecting piece 203; a first lower mounting gap C is formed by the gap among the first middle rail connecting piece 301, the first lower rail connecting piece 401 and the second lower rail connecting pieces 402 on both sides; a second lower mounting gap D is formed by the gap above the third lower rail connecting piece 403 and the fourth middle rail connecting piece 304.

[0046] Refer to Figures 1 - 13 , an upper load-bearing wheel set 8 is arranged between the upper rail 2 and the middle rail 3. The upper load-bearing wheel set 8 includes an upper load-bearing frame 801, a first upper load-bearing component arranged in the middle of the upper load-bearing frame 801, and second and third upper load-bearing components arranged on the left and right sides of the upper load-bearing frame 801. Among them, the first upper load-bearing component is located within the first upper mounting gap A; the second and third upper load-bearing components are both located within the second upper mounting gap B. Among them,

[0047] The first upper load-bearing component includes multiple groups of first upper load-bearing rollers 802 arranged in the middle of the upper load-bearing frame 801. The multiple groups of first upper load-bearing rollers 802 are arranged in a straight line and are all rotatably connected to the upper load-bearing frame 801; the upper ends of each group of first upper load-bearing rollers 802 are in contact with the lower surface of the first upper rail connecting piece 201, and the lower ends are in contact with the upper surface of the first middle rail connecting piece 301, so as to support the upper rail 2 to improve its load-bearing capacity. At the same time, the friction between the upper rail 2 and the middle rail 3 can also be reduced to guide the movement of the upper rail 2;

[0048] The second upper load-bearing component includes second upper load-bearing rollers 804 arranged on the left and right sides of the upper load-bearing frame 801; the second upper load-bearing rollers 804 are rotatably connected to the left and right sides of the upper load-bearing frame 801, and the axial direction of the second upper load-bearing rollers 804 is perpendicular to the axial direction of the first upper load-bearing rollers 802; the wheel surfaces of the second upper load-bearing rollers 804 are respectively in contact with the outer side surface of the second middle rail connecting piece 302 and the inner side surface of the second upper rail connecting piece 202; by arranging the second upper load-bearing rollers 804, the position of the upper rail 2 can be limited during the sliding process of the upper rail 2 to prevent the upper rail 2 from shaking left and right during the sliding process;

[0049] The third upper load-bearing component includes multiple groups of third upper load-bearing rollers 803 arranged on the left and right sides of the upper load-bearing frame 801. The multiple groups of third upper load-bearing rollers 803 are arranged in a straight line and are all rotatably connected to the upper load-bearing frame 801. The upper end of each group of third upper load-bearing rollers 803 contacts the lower surface of the third middle rail connecting piece 303, and the lower end contacts the upper surface of the third upper rail connecting piece 203.

[0050] See Figures 1 - 13 , a lower load-bearing wheel set 9 is arranged between the lower rail 4 and the middle rail 3. The lower load-bearing wheel set 9 includes a lower load-bearing frame 901, a first lower load-bearing component arranged in the middle of the lower load-bearing frame 901, and a second lower load-bearing component and a third lower load-bearing component arranged on both sides of the lower load-bearing frame 901. Among them, the first lower load-bearing component is located in the first lower installation gap C; the second lower load-bearing component and the third lower load-bearing component are located in the second lower installation gap D; among them,

[0051] The first lower load-bearing component includes first lower load-bearing rollers 902 arranged on the lower side of the lower load-bearing frame 901. There are multiple groups of first lower load-bearing rollers 902, which are arranged in a straight line and are rotatably connected to the lower load-bearing frame 901. The upper end of each group of first lower load-bearing rollers 902 contacts the lower surface of the first middle rail connecting piece 301, and the lower end contacts the upper surface of the first lower rail connecting piece 401;

[0052] The third lower load-bearing component includes second lower load-bearing rollers 903 arranged on the upper side of the lower load-bearing frame 901. There are multiple groups of second lower load-bearing rollers 903, which are arranged in a straight line and are rotatably connected to the lower load-bearing frame 901. The upper end of the second lower load-bearing rollers 903 contacts the lower surface of the third lower rail connecting piece 403, and the lower end contacts the upper surface of the fourth middle rail connecting piece 304;

[0053] By arranging the first lower load-bearing rollers 902 and the second lower load-bearing rollers 903, the support and guidance of the middle rail can be realized (that is, the friction between the middle rail 3 and the lower rail 4 is reduced);

[0054] The second lower load-bearing component includes a third lower load-bearing roller 904 disposed on the other side of the lower load-bearing frame 901; the third lower load-bearing roller 904 is rotatably connected in the lower load-bearing frame 901, and the axial direction of the third lower load-bearing roller 904 is perpendicular to the axial direction of the first lower load-bearing roller 902 or the second lower load-bearing roller 903; the wheel surfaces of the third lower load-bearing roller 904 are respectively in contact with the outer side surface of the second middle rail connecting piece 302 and the inner side surface of the second lower rail connecting piece 402; by providing the second load-bearing component, the position of the middle rail 3 can be limited during the sliding process of the middle rail 3, preventing the middle rail 3 from swaying left and right during the sliding process; and in combination with the second upper load-bearing roller 804, the upper rail 2 is limited in the left and right directions, so as to ensure that the sliding rail structure of the present invention will not sway left and right during the working process, and the stability is better.

[0055] See Figures 1 - 13 , both the upper load-bearing wheel group 8 and the lower load-bearing wheel group 9 are two groups. Among them, the upper load-bearing frames 801 in the two groups of upper load-bearing wheel groups 8 are connected by an upper connecting frame; the lower load-bearing frames 901 in the two groups of lower load-bearing wheel groups 9 are connected by a lower connecting frame.

[0056] See Figures 1 - 13 , a gear-rack transmission mechanism is provided between the upper load-bearing frame 801 and the middle rail 3 and between the lower load-bearing frame 901 and the middle rail 3; wherein, the gear-rack transmission mechanism includes a first rack 5 provided on the upper connecting frame, a second rack 7 provided on the lower connecting frame, and a transmission gear 6 provided on the middle rail 3. Among them, the transmission gear 6 is rotatably connected on the middle rail 3, and the upper end meshes with the first rack 5 and the lower end meshes with the second rack 7;

[0057] Through the above settings, during the sliding process of the upper rail 2, due to the meshing relationship between the first rack 5 and the transmission gear 6, therefore, the first rack 5 will drive the transmission gear 6 to rotate. While the transmission gear 6 is rotating, since there is also a meshing relationship between the transmission gear 6 and the second rack 7, therefore the middle rail 3 will also move relative to the lower rail 4; and the transmission ratio between the first rack 5, the transmission gear 6 and the second rack 7 is determined; therefore, every time the upper rail 2 moves a certain distance, the movement distance of the middle rail 3 is also determined and unique, so that the movement of the sliding rail structure of the present invention is more accurate.

[0058] See Figures 1 - 13 , both sides of the upper connecting frame and the lower connecting frame are respectively installed on the upper connecting frame and the lower connecting frame by means of snap connection, which can facilitate the installation and disassembly of the first rack 7 and the second non-rack 10; in addition, screw connection can also be used.

[0059] SeeFigures 1 - 13 , there are two sets of the brackets 1, and the two sets of brackets 1 are arranged at both ends of the lower end. Each set of brackets 1 is L-shaped. By using the brackets 1, the slide rail structure of the present utility model can be installed on furniture.

[0060] Example 2

[0061] See Figure 14 , the difference between this embodiment and Embodiment 1 is that

[0062] The installation of the bracket 1 in this embodiment is different from that in Embodiment 1, that is, the upper rail in Embodiment 1 is used as the lower rail 4 in this embodiment; that is to say, the other components in Embodiment 1 except the bracket 1 are rotated 180 degrees and then installed on the bracket 1.

[0063] Through the above settings, both the upper rail 2 and the lower rail 4 in this embodiment can be used as movable rails, and the installation is more convenient.

[0064] The above is the preferred embodiment of the present utility model, but the embodiments of the present utility model are not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present utility model shall be equivalent replacement methods and are all included in the protection scope of the present utility model.

Claims

1. A high-load-bearing and high-stability slide rail structure, comprising a bracket, a lower rail, a middle rail and an upper rail arranged on the bracket, characterized in that: The upper rail comprises a first upper rail tab arranged horizontally and second upper rail tabs arranged on both sides of the first upper rail tab, wherein the second upper rail tabs on both sides extend vertically downward and are horizontally bent inward to form a third upper rail tab extending horizontally; The lower rail comprises a first lower rail tab arranged horizontally and second lower rail tabs arranged on both sides of the first lower rail tab, wherein the second lower rail tabs on both sides extend vertically upward and are horizontally bent inward to form a third lower rail tab extending horizontally; The middle rail includes a first middle rail joint piece arranged horizontally and second middle rail joint pieces arranged on both sides of the first middle rail joint piece, wherein the second middle rail joint pieces on both sides extend vertically upward and are horizontally bent outward to form a third middle rail joint piece extending horizontally; a fourth middle rail joint piece is arranged between the second middle rail joint pieces on both sides and the first middle rail joint piece, the fourth middle rail joint piece is attached to the first middle rail joint piece, and one end of the fourth middle rail joint piece is connected to the bottom of the second middle rail joint piece, and the other end is connected to the first middle rail joint piece in an arc; An upper load-bearing wheel group is arranged between the upper rail and the middle rail, and a lower load-bearing wheel group is arranged between the lower rail and the middle rail.

2. The high-load-bearing and high-stability slide rail structure according to claim 1, characterized in that: The gap between the second middle rail joint piece on both sides of the middle rail and the first upper rail joint piece forms a first upper installation gap; the gap between the third middle rail joint piece and the third upper rail joint piece forms a second upper installation gap; the gap between the first middle rail joint piece, the first lower rail joint piece and the second lower rail joint pieces on both sides forms a first lower installation gap; the gap above the third lower rail joint piece and the fourth middle rail joint piece constitutes a second lower installation gap.

3. The high-load-bearing and high-stability slide rail structure according to claim 2, characterized in that: The upper load-bearing wheel group includes an upper load-bearing frame, a first upper load-bearing component arranged in the middle of the upper load-bearing frame, and a second upper load-bearing component and a third upper load-bearing component arranged on the left and right sides of the upper load-bearing frame, wherein the first upper load-bearing component is located in the first upper installation gap; the second upper load-bearing component and the third upper load-bearing component are both located in the second upper installation gap.

4. The high-load-bearing and high-stability slide rail structure according to claim 3, characterized in that: The first upper load-bearing component includes a first upper load-bearing roller arranged in the middle part of the upper load-bearing frame, the first upper load-bearing roller is rotatably connected to the upper load-bearing frame, the upper end of the first upper load-bearing roller contacts the lower surface of the first upper rail joint piece, and the lower end contacts the upper surface of the first middle rail joint piece.

5. The high-load-bearing and high-stability slide rail structure according to claim 4, characterized in that: The second upper load-bearing component includes second upper load-bearing rollers arranged on the left and right sides of the upper load-bearing frame; the second upper load-bearing rollers are rotatably connected to the left and right sides of the upper load-bearing frame, and the axial direction of the second upper load-bearing roller is perpendicular to the axial direction of the first upper load-bearing roller; the wheel surface of the second upper load-bearing roller is in contact with the outer side surface of the second middle rail joint and the inner side surface of the second upper rail joint respectively.

6. The high-load-bearing and high-stability slide rail structure according to claim 5, characterized in that: The third upper load-bearing component includes third upper load-bearing rollers arranged on the left and right sides of the upper load-bearing frame, the axial direction of the third upper load-bearing roller is parallel to the axial direction of the first upper load-bearing roller, and the third upper load-bearing roller is rotatably connected to the upper load-bearing frame, the upper end of the third upper load-bearing roller contacts the lower surface of the third middle rail joint, and the lower end contacts the upper surface of the third upper rail joint.

7. The high-load-bearing and high-stability slide rail structure according to claim 2, characterized in that: The lower load-bearing wheel group includes a lower load-bearing frame, a first lower load-bearing component arranged in the middle of the lower load-bearing frame, and a second lower load-bearing component and a third lower load-bearing component arranged on the left and right sides of the lower load-bearing frame, wherein the first lower load-bearing component is located in the first lower installation gap; the second lower load-bearing component and the third lower load-bearing component are both located in the second lower installation gap.

8. The high-load-bearing and high-stability slide rail structure according to claim 7, characterized in that: The first lower load-bearing component includes a first lower load-bearing roller arranged on the lower side of the lower load-bearing frame; the first lower load-bearing rollers are multiple groups, the multiple groups of first lower load-bearing rollers are arranged in a straight line, and are rotatably connected to the lower load-bearing frame; the upper end of the first lower load-bearing roller contacts the lower surface of the first middle rail joint piece, and the lower end contacts the upper surface of the first lower rail joint piece.

9. The high-load-bearing and high-stability slide rail structure according to claim 8, characterized in that: The third lower load-bearing component includes a second lower load-bearing roller arranged on the lower side of the lower load-bearing frame; the second lower load-bearing rollers are divided into multiple groups, and the multiple groups of second lower load-bearing rollers are arranged in a straight line and rotatably connected to the lower load-bearing frame; the upper end of the second lower load-bearing roller contacts the lower surface of the third lower rail joint piece, and the lower end contacts the upper surface of the fourth middle rail joint piece.

10. The high-load-bearing and high-stability slide rail structure according to claim 9, characterized in that: The second lower load-bearing component includes a third lower load-bearing roller arranged on both sides of the lower load-bearing frame; the third lower load-bearing roller is rotatably connected to the lower load-bearing frame, and the axial direction of the third lower load-bearing roller is perpendicular to the axial direction of the first lower load-bearing roller or the second lower load-bearing roller; the wheel surface of the third lower load-bearing roller is in contact with the outer side surface of the second middle rail joint and the inner side surface of the second lower rail joint respectively.

Images