Three-section type synchronous sliding rail

Abstract

The utility model discloses a three-section type synchronous sliding rail which comprises a support, a fixed rail arranged on the support, a middle rail arranged on the fixed rail and a movable rail arranged on the middle rail, an upper bearing frame is arranged between the movable rail and the middle rail, and a lower bearing frame is arranged between the fixed rail and the middle rail. A first gear and rack transmission mechanism is arranged between the movable rail and the middle rail, and a second gear and rack transmission mechanism is arranged between the lower bearing frame and the middle rail. Or a first gear rack transmission mechanism is arranged between the upper bearing frame and the middle rail, and a second gear rack transmission mechanism is arranged between the fixed rail and the middle rail. The movement speed of the movable rail and the movement speed of the middle rail are mutually restrained by arranging the multiple sets of gear and rack transmission mechanisms, so that the stability of the relative speed between the middle rail and the movable rail is guaranteed, and the problems that the movable rail and the middle rail slide out and slide in in in an overlapped mode, collide or misplaced, and the middle rail leaks out are solved.

Description

Technical Field

[0001] The utility model belongs to the field of furniture, and particularly relates to a three - section synchronous slide rail. Background Art

[0002] The drawers on the market usually use three - section hidden slide rails to realize the outward pulling out or inward retracting of the drawers into the furniture body. The main components of the three - section hidden slide rail include a fixed rail, a movable rail, and a middle rail arranged between the two; during the process of pulling out or closing the drawer, the force for pulling out the drawer or closing the drawer is usually uneven, which makes the speed of the drawer uneven during operation due to the uneven force, and thus the drawer will produce abnormal noises during movement, further resulting in a poor user experience. In addition, the movable rail and the middle rail are slidably connected, which cannot ensure the uniformity of their relative speeds, and thus problems such as overlapping sliding in and out, collision, or leakage of the misaligned middle rail may occur. Summary of the Utility Model

[0003] In order to overcome the deficiencies existing in the prior art, the utility model provides a three - section synchronous slide rail, which can ensure the uniformity of the relative speed between the movable rail and the middle rail, thereby avoiding problems such as overlapping sliding in and out, collision, or leakage of the misaligned middle rail between the movable rail and the middle rail.

[0004] The technical solution of the utility model to solve the above technical problems is as follows:

[0005] A three - section synchronous slide rail includes a bracket, a fixed rail arranged on the bracket, a middle rail arranged on the fixed rail, and a movable rail arranged on the middle rail. Among them, an upper load - bearing frame is arranged between the movable rail and the middle rail, and a lower load - bearing frame is arranged between the fixed rail and the middle rail; among them,

[0006] A first gear - rack transmission mechanism is arranged between the movable rail and the middle rail, and a second gear - rack transmission mechanism is arranged between the lower load - bearing frame and the middle rail; alternatively, a first gear - rack transmission mechanism is arranged between the upper load - bearing frame and the middle rail, and a second gear - rack transmission mechanism is arranged between the fixed rail and the middle rail.

[0007] Preferably, the first gear - rack transmission mechanism includes a first transmission gear arranged on the movable rail and a first transmission rack arranged on the middle rail. Among them, the first transmission rack is located below the first transmission gear and extends along the length direction of the middle rail; the first transmission gear is rotatably connected to the movable rail, and the lower end of the first transmission gear meshes with the first transmission rack.

[0008] Preferably, the first rack and pinion transmission mechanism includes a first transmission rack disposed on the movable rail and a first transmission pinion disposed on the middle rail. Among them, the first transmission rack is located above the first transmission pinion and extends along the length direction of the movable rail; the first transmission pinion is rotatably connected to the middle rail, and the upper end of the first transmission pinion meshes with the first transmission rack. Preferably, the second rack and pinion transmission mechanism includes a second transmission rack disposed on the lower load-bearing frame and a second transmission pinion disposed on the middle rail. Among them, the second transmission rack is located below the second transmission pinion and extends along the length direction of the lower load-bearing frame; the lower end of the second transmission pinion meshes with the second transmission rack.

[0009] Preferably, the second rack and pinion transmission mechanism includes a second transmission pinion disposed on the lower load-bearing frame and a second transmission rack disposed on the middle rail. Among them, the second transmission rack is located above the second transmission pinion and extends along the length direction of the middle rail; the upper end of the second transmission pinion meshes with the second transmission rack.

[0010] Preferably, the first transmission rack and the second transmission rack are of an integral structure, that is, a double-sided rack is adopted.

[0011] Preferably, the first rack and pinion transmission mechanism includes a first transmission rack disposed on the upper load-bearing frame and a first transmission pinion disposed on the middle rail. Among them, the first transmission rack is located above the first transmission pinion and extends along the length direction of the movable rail; the first transmission pinion is rotatably connected to the middle rail, and the upper end of the first transmission pinion meshes with the first transmission rack.

[0012] Preferably, the first rack and pinion transmission mechanism includes a first transmission pinion disposed on the upper load-bearing frame and a first transmission rack disposed on the middle rail. Among them, the first transmission rack is located below the first transmission pinion and extends along the length direction of the middle rail; the first transmission pinion is rotatably connected to the movable rail, and the lower end of the first transmission pinion meshes with the first transmission rack.

[0013] Preferably, the second rack and pinion transmission mechanism includes a second transmission rack disposed on the fixed rail and a second transmission pinion disposed on the middle rail. Among them, the second transmission rack is located below the second transmission pinion and extends along the length direction of the fixed rail; the lower end of the second transmission pinion meshes with the second transmission rack.

[0014] Preferably, the upper load-bearing frame includes upper load-bearing wheel frames, and there are two groups of upper load-bearing wheel frames, which are connected by a first connecting frame; the first transmission rack is installed on the first connecting frame; several groups of balls / rollers are arranged on the top, bottom and side of each group of upper load-bearing wheel frames; the lower load-bearing frame includes lower load-bearing wheel frames, and there are two groups of lower load-bearing wheel frames, which are connected by a second connecting frame; the second transmission rack is installed on the second connecting frame; several groups of balls / rollers are arranged on the top, bottom and side of each group of lower load-bearing wheel frames.

[0015] Preferably, there are two groups of the brackets, and the two groups of brackets are arranged at both ends of the fixed rail.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] In the three-section synchronous slide rail of the present invention, a first gear-rack transmission mechanism is arranged between the movable rail and the middle rail, and a second gear-rack transmission mechanism is arranged between the lower load-bearing frame and the middle rail; alternatively, a first gear-rack transmission mechanism is arranged between the upper load-bearing frame and the middle rail, and a second gear-rack transmission mechanism is arranged between the fixed rail and the middle rail; through the constraint relationship of the gear-rack transmission mechanism, the movements of the movable rail and the middle rail can be mutually constrained, so as to avoid problems such as overlapping sliding in and out, collision, or misalignment of the middle rail leakage between the movable rail and the middle rail. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the first specific embodiment of the three-section synchronous slide rail of the present invention.

[0019] Figure 2 is Figure 1 the exploded view of.

[0020] Figure 3 It is a schematic diagram of the state when the three-section synchronous slide rail of the present invention is unfolded.

[0021] Figure 4 It is a schematic diagram of the state when the three-section synchronous slide rail of the present invention is folded.

[0022] Figure 5 It is a schematic structural diagram of the middle rail.

[0023] Figure 6 It is a schematic structural diagram of the lower load-bearing frame.

[0024] Figure 7 It is the exploded view of the second specific embodiment of the three-section synchronous slide rail of the present invention.

[0025] Figure 8Schematic diagram of the state when the three - section synchronous slide rail of the second specific embodiment is unfolded.

[0026] Figure 9 Schematic diagram of the state when the three - section synchronous slide rail of the second specific embodiment is folded.

[0027] Figure 10 Schematic diagram of the structure of the middle rail.

[0028] Figure 11 Schematic diagram of the mechanism drive of the three - section synchronous slide rail of the second specific embodiment.

[0029] Figure 12 Exploded view of the third specific embodiment of the three - section synchronous slide rail of the present utility model.

[0030] Figure 13 Schematic diagram of the state when the three - section synchronous slide rail of the third specific embodiment is unfolded.

[0031] Figure 14 Schematic diagram of the state when the three - section synchronous slide rail of the third specific embodiment is folded.

[0032] Figure 15 Schematic diagram of the structure of the middle rail.

[0033] Figure 16 Schematic diagram of the structure of the upper load - bearing frame.

[0034] Figure 17 Schematic diagram of the mechanism drive of the three - section synchronous slide rail of the second specific embodiment.

[0035] Figure 18 Exploded view of the fourth specific embodiment of the three - section synchronous slide rail of the present utility model.

[0036] Figure 19 Schematic diagram of the state when the three - section synchronous slide rail of the fourth specific embodiment is unfolded.

[0037] Figure 20 Schematic diagram of the state when the three - section synchronous slide rail of the fourth specific embodiment is folded.

[0038] Figure 21 Schematic diagram of the structure of the middle rail.

[0039] Figure 22 Installation schematic diagram of the lower load - bearing frame and the second transmission gear).

[0040] Figure 23 Schematic diagram of the mechanism drive of the three - section synchronous slide rail of the fourth specific embodiment. Specific embodiment

[0041] The present utility model will be further described in detail below in conjunction with embodiments and the accompanying drawings. However, the implementation manners of the present utility model are not limited thereto.

[0042] Example 1

[0043] Refer to Figures 1 - 6 , the three - section synchronous slide rail of the present utility model includes a bracket 1, a fixed rail 4 arranged on the bracket 1, an intermediate rail 3 arranged on the fixed rail 4, and a movable rail 2 arranged on the intermediate rail 3. Among them, an upper load - bearing frame 8 is arranged between the movable rail 2 and the intermediate rail 3, and a lower load - bearing frame 9 is arranged between the fixed rail 4 and the intermediate rail 3; among them,

[0044] The first gear - rack transmission mechanism includes a first transmission gear 6 arranged on the movable rail 2 and a first transmission rack 5 arranged on the intermediate rail 3. Among them, the first transmission rack 5 is located below the first transmission gear 6 and extends along the length direction of the intermediate rail 3; the first transmission gear 6 is rotatably connected to the movable rail 2, and the lower end of the first transmission gear 6 meshes with the first transmission rack 5;

[0045] The second gear - rack transmission mechanism includes a second transmission rack 10 arranged on the lower load - bearing frame 9 and a second transmission gear 7 arranged on the intermediate rail 3. Among them, the second transmission rack 10 is located below the second transmission gear 7 and extends along the length direction of the lower load - bearing frame 9; the lower end of the second transmission gear 7 meshes with the second transmission rack 10.

[0046] The three - section synchronous slide rail of the present utility model is provided with a first gear - rack transmission mechanism between the movable rail 2 and the intermediate rail 3 and a second gear - rack transmission mechanism between the lower load - bearing frame 9 and the intermediate rail 3; through the constraint relationship of the gear - rack transmission mechanism, the movements of the movable rail 2 and the intermediate rail 3 can be mutually constrained, thereby avoiding problems such as overlapping sliding in and out, collision, or misalignment of the intermediate rail 3 leakage between the movable rail 2 and the intermediate rail 3.

[0047] Refer to Figures 1 - 6 , the upper load - bearing frame 8 includes an upper load - bearing wheel frame 801. There are two groups of the upper load - bearing wheel frames 801, and the two groups of upper load - bearing wheel frames 801 are connected by a first connecting frame; the first transmission rack 5 is installed on the first connecting frame; a plurality of groups of balls / rollers 802 are arranged on the top, bottom, and side of each group of upper load - bearing wheel frames 801. By arranging the balls / rollers 802, the movement of the upper load - bearing frame 8 can be guided, and at the same time, the friction between the movable rail 2 and the intermediate rail 3 can be reduced, making the movement of the movable rail 2 smoother.

[0048] Refer to Figures 1 - 6, the lower load-bearing frame 9 includes a lower load-bearing wheel frame 901, and there are two sets of the lower load-bearing wheel frames 901, which are connected by a second connecting frame between the two sets of lower load-bearing wheel frames 901; the second transmission rack 10 is installed on the second connecting frame; a number of sets of balls / rollers 902 are arranged on the top, bottom and side of each set of lower load-bearing wheel frames 901; by providing the balls / rollers 902, the movement of the lower load-bearing frame 9 can be guided, and at the same time, the friction between the fixed rail 4 and the middle rail 3 can be reduced, making the movement of the middle rail 3 smoother.

[0049] Except for the above structure, other structures of the three-section synchronous slide rail of the present invention can refer to the existing three-section hidden slide rail for implementation.

[0050] Example 2

[0051] See Figures 7 - 11 , the difference between this embodiment and Embodiment 1 is:

[0052] The first gear-rack transmission mechanism includes a first transmission rack 5 provided on the movable rail 2 and a first transmission gear 6 provided on the middle rail 3. Among them, the first transmission rack 5 is located above the first transmission gear 6 and extends along the length direction of the movable rail 2; the first transmission gear 6 is rotatably connected to the middle rail 3, and the upper end of the first transmission gear 6 meshes with the first transmission rack 5;

[0053] The second gear-rack transmission mechanism includes a second transmission rack 10 provided on the lower load-bearing frame 9 and a second transmission gear 7 provided on the middle rail 3. Among them, the second transmission rack 10 is located below the second transmission gear 7 and extends along the length direction of the lower load-bearing frame 9; the lower end of the second transmission gear 7 meshes with the second transmission rack 10.

[0054] The three-section synchronous slide rail of the present invention is provided with a first gear-rack transmission mechanism between the movable rail 2 and the middle rail 3 and a second gear-rack transmission mechanism between the lower load-bearing frame 9 and the middle rail 3; through the constraint relationship of the gear-rack transmission mechanism, the movements of the movable rail 2 and the middle rail 3 can be mutually constrained, thus avoiding problems such as overlapping sliding in and out, collision or misalignment of the middle rail 3 leakage between the movable rail 2 and the middle rail 3.

[0055] Except for the above structure, the remaining structures are implemented with reference to Embodiment 1.

[0056] Example 3

[0057] See Figures 12 - 17 , the difference between this embodiment and Embodiment 1 is:

[0058] The first gear-rack transmission mechanism includes a first transmission rack 5 disposed on the upper load-bearing frame 8 and a first transmission gear 6 disposed on the middle rail 3. Among them, the first transmission rack 5 is located above the first transmission gear 6 and extends along the length direction of the movable rail 2; the first transmission gear 6 is rotatably connected to the middle rail 3, and the upper end of the first transmission gear 6 meshes with the first transmission rack 5.

[0059] The second gear-rack transmission mechanism includes a second transmission rack 10 disposed on the fixed rail 4 and a second transmission gear 7 disposed on the middle rail 3. Among them, the second transmission rack 10 is located below the second transmission gear 7 and extends along the length direction of the fixed rail 4; the lower end of the second transmission gear 7 meshes with the second transmission rack 10.

[0060] The three-section synchronous slide rail of the present utility model is provided with a first gear-rack transmission mechanism between the upper load-bearing frame 8 and the middle rail 3 and a second gear-rack transmission mechanism between the fixed rail 4 and the middle rail 3; through the constraint relationship of the gear-rack transmission mechanism, the movements of the movable rail 2 and the middle rail 3 can be mutually constrained, thereby avoiding problems such as overlapping sliding in and out, collision, or misalignment of the middle rail 3 leakage between the movable rail 2 and the middle rail 3.

[0061] See Figures 12 - 17 , the upper load-bearing frame 8 includes upper load-bearing wheel frames 801. There are two groups of upper load-bearing wheel frames 801, and the two groups of upper load-bearing wheel frames 801 are connected by a first connecting frame; the second transmission rack 10 is installed on the first connecting frame; a plurality of groups of balls / rollers 802 are provided on the top, bottom, and side of each upper load-bearing wheel frame 801. By providing the balls / rollers 802, the movement of the upper load-bearing frame 8 can be guided, and at the same time, the friction between the movable rail 2 and the middle rail 3 can be reduced, making the movement of the movable rail 2 smoother.

[0062] Except for the above structure, the remaining structures are implemented with reference to Embodiment 1.

[0063] Example 4

[0064] See Figures 18 - 23 , the difference between this embodiment and Embodiment 1 is:

[0065] The first gear-rack transmission mechanism includes a first transmission gear 6 disposed on the movable rail 2 and a first transmission rack disposed on the middle rail 3. Among them, the first transmission rack is located below the first transmission gear 6 and extends along the length direction of the middle rail 3; the first transmission gear 6 is rotatably connected to the movable rail 2, and the lower end of the first transmission gear 6 meshes with the first transmission rack.

[0066] The second gear-rack transmission mechanism includes a second transmission gear 7 disposed on the lower load-bearing frame 9 and a second transmission rack disposed on the middle rail 3. Among them, the second transmission rack is located above the second transmission gear 7 and extends along the length direction of the middle rail 3; the upper end of the second transmission gear 7 meshes with the second transmission rack.

[0067] In the three-section synchronous slide rail of the present utility model, a first gear-rack transmission mechanism is provided between the movable rail 2 and the middle rail 3, and a second gear-rack transmission mechanism is provided between the lower load-bearing frame 9 and the middle rail 3; through the constraint relationship of the gear-rack transmission mechanism, the movements of the movable rail 2 and the middle rail 3 can be mutually constrained, thereby avoiding problems such as overlapping sliding in and out, collision, or misalignment of the middle rail 3 leakage between the movable rail 2 and the middle rail 3.

[0068] In this embodiment, the first transmission rack and the second transmission rack are of an integral structure, that is, a double-sided rack 5 is adopted. The upper end of the double-sided rack 5 meshes with the first transmission gear 6, and the lower end meshes with the second transmission gear 7.

[0069] Except for the above structure, the remaining structures are implemented with reference to Embodiment 1.

[0070] Example 5

[0071] The difference between this embodiment and Embodiment 1 is as follows:

[0072] The first gear-rack transmission mechanism includes a first transmission gear 6 disposed on the upper load-bearing frame 8 and a first transmission rack 5 disposed on the middle rail 3. Among them, the first transmission rack 5 is located below the first transmission gear 6 and extends along the length direction of the middle rail 3; the first transmission gear 6 is rotatably connected to the movable rail 2, and the lower end of the first transmission gear 6 meshes with the first transmission rack 5;

[0073] The second gear-rack transmission mechanism includes a second transmission rack 10 disposed on the fixed rail 4 and a second transmission gear 7 disposed on the middle rail 3. Among them, the second transmission rack 10 is located below the second transmission gear 7 and extends along the length direction of the fixed rail 4; the lower end of the second transmission gear 7 meshes with the second transmission rack 10.

[0074] The three - section synchronous slide rail of the utility model is provided with a first gear - rack transmission mechanism between the upper load - bearing frame 8 and the middle rail 3, and a second gear - rack transmission mechanism between the fixed rail 4 and the middle rail 3; through the constraint relationship of the gear - rack transmission mechanism, the movements of the movable rail 2 and the middle rail 3 can be mutually constrained, thus avoiding problems such as the overlapping sliding in and out, collision, or misalignment of the middle rail 3 leakage between the movable rail 2 and the middle rail 3.

[0075] Except for the above - mentioned structure, the rest of the structure is implemented with reference to Embodiment 1.

[0076] Example 6

[0077] In addition to the methods of the above - mentioned Embodiment 1 - Embodiment 5, a first gear - rack transmission mechanism can also be provided between the upper load - bearing frame 8 and the middle rail 2, and a second gear - rack transmission mechanism can be provided between the lower load - bearing frame 9 and the middle rail 2.

[0078] The above is the preferred embodiment of the utility model, but the embodiments of the 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 utility model shall be equivalent replacement methods and are all included in the protection scope of the utility model.

Claims

1. A three - section synchronous slide rail, comprising a bracket, a fixed rail arranged on the bracket, a middle rail arranged on the fixed rail, and a movable rail arranged on the middle rail, wherein, An upper load-bearing frame is provided between the movable rail and the middle rail, and a lower load-bearing frame is provided between the fixed rail and the middle rail; characterized in that, A first gear-rack transmission mechanism is provided between the movable rail and the middle rail, and a second gear-rack transmission mechanism is provided between the lower load-bearing frame and the middle rail; or, a first gear-rack transmission mechanism is provided between the upper load-bearing frame and the middle rail, and a second gear-rack transmission mechanism is provided between the fixed rail and the middle rail; The first gear-rack transmission mechanism includes a first transmission gear provided on the movable rail and a first transmission rack provided on the middle rail. Among them, the first transmission rack is located below the first transmission gear and extends along the length direction of the middle rail; the first transmission gear is rotatably connected to the movable rail, and the lower end of the first transmission gear meshes with the first transmission rack; or, the first transmission rack is located above the first transmission gear and extends along the length direction of the movable rail; the first transmission gear is rotatably connected to the middle rail, and the upper end of the first transmission gear meshes with the first transmission rack; The second gear-rack transmission mechanism includes a second transmission rack provided on the lower load-bearing frame and a second transmission gear provided on the middle rail. Among them, the second transmission rack is located below the second transmission gear and extends along the length direction of the lower load-bearing frame; the lower end of the second transmission gear meshes with the second transmission rack.

2. The three - section synchronous slide rail according to claim 1, wherein, The second gear-rack transmission mechanism includes a second transmission gear provided on the lower load-bearing frame and a second transmission rack provided on the middle rail. Among them, the second transmission rack is located above the second transmission gear and extends along the length direction of the middle rail; the upper end of the second transmission gear meshes with the second transmission rack.

3. The three - section synchronous slide rail according to claim 2, wherein, The first transmission rack and the second transmission rack are of an integral structure, that is, a double-sided rack is adopted.

4. The three - section synchronous slide rail according to claim 1, characterized in that, The first gear-rack transmission mechanism includes a first transmission rack provided on the upper load-bearing frame and a first transmission gear provided on the middle rail. Among them, the first transmission rack is located above the first transmission gear and extends along the length direction of the movable rail; the first transmission gear is rotatably connected to the middle rail, and the upper end of the first transmission gear meshes with the first transmission rack.

5. The three - section synchronous slide rail according to claim 1, characterized in that, The first gear-rack transmission mechanism includes a first transmission gear provided on the upper load-bearing frame and a first transmission rack provided on the middle rail. Among them, the first transmission rack is located below the first transmission gear and extends along the length direction of the middle rail; the first transmission gear is rotatably connected to the movable rail, and the lower end of the first transmission gear meshes with the first transmission rack.

6. The three - section synchronous slide rail according to claim 4 or 5, characterized in that, The second gear-rack transmission mechanism includes a second transmission rack disposed on the fixed rail and a second transmission gear disposed on the middle rail. Among them, the second transmission rack is located below the second transmission gear and extends along the length direction of the fixed rail; the lower end of the second transmission gear meshes with the second transmission rack.

7. The three-section synchronous slide rail according to claim 1, wherein, It further includes a first gear-rack transmission mechanism disposed between the upper load-bearing frame and the middle rail and a second gear-rack transmission mechanism between the lower load-bearing frame and the middle rail.

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