Three-section sliding rail for furniture drawer

By incorporating a gear and rack transmission mechanism into the three-section slide rails of the furniture drawer, the problem of uneven speed during drawer operation is solved, achieving uniform movement of the upper and middle rails and avoiding abnormal noises and structural problems caused by uneven sliding connections.

CN223653497UActive Publication Date: 2025-12-12DONGGUAN GERUISI PRECISION HARDWARE TECH CO LTD
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Patent Information

Application Number
CN202423042893.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-10
Publication Date
2025-12-12
Estimated Expiration
2034-12-10

AI Technical Summary

Technical Problem

The three-section concealed drawer slides on the market may cause uneven speed due to uneven force during drawer operation, resulting in abnormal noise and uneven sliding connection between the upper and middle rails. This may lead to problems such as overlapping sliding out, sliding in, collision, or misalignment of the middle rail and leakage.

Method used

A rack and pinion transmission mechanism is adopted between the upper and middle rails, between the upper rail and the upper load-bearing wheel set, and between the middle and lower rails. Through the constraint relationship of the rack and pinion transmission mechanism, the movement speed of the upper rail and the middle rail are matched one-to-one, so as to achieve uniform movement.

Benefits of technology

This avoids issues such as overlapping, sliding out, collision, or misalignment between the upper and middle rails, improving the smoothness of drawer operation and user experience.

✦ Generated by Eureka AI based on patent content.

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    Figure CN223653497U_ABST
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Abstract

The utility model discloses a three-section sliding rail for a furniture drawer. The three-section sliding rail comprises a support, a lower rail, a middle rail and an upper rail. A first mounting groove is formed between the left side of the middle rail and the left side of the upper rail, and a second mounting groove is formed between the right side of the middle rail and the right side of the upper rail; a third mounting groove is formed between the left side of the middle rail and the left side of the lower rail, and a fourth mounting groove is formed between the right side of the middle rail and the right side of the lower rail; a fifth mounting groove is formed between the lower side of the middle rail and the upper side of the lower rail; an upper bearing device is arranged between the upper rail and the middle rail, and a lower bearing device is arranged between the lower rail and the middle rail. According to the three-section sliding rail, it can be guaranteed that the relative speed of the upper rail and the relative speed of the middle rail are uniform, and therefore the problems that the upper rail and the middle rail are overlapped, slide out and slide in, collide or misplaced, and the middle rail leaks out are solved.
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Description

Technical Field

[0001] This utility model belongs to the field of furniture, specifically relating to a three-section drawer slide for furniture drawers. Background Technology

[0002] Most drawers on the market use three-section concealed slides to pull the drawer out or retract it. The main components of these three-section concealed slides include the bottom rail, the top rail, and the middle rail located between the two. During the process of pulling out or closing the drawer, the force applied to pull out or close the drawer is usually uneven. This uneven force causes the drawer to move at an uneven speed, resulting in abnormal noises during the movement of the drawer and a poor user experience. Furthermore, the sliding connection between the top rail and the middle rail cannot guarantee uniform relative speed, which may lead to problems such as overlapping sliding out or in, collisions, or misalignment of the middle rail. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides a three-section slide rail for furniture drawers. The three-section slide rail can ensure that the relative speed of the upper rail and the middle rail is uniform, thereby avoiding problems such as overlapping sliding, collision, or misalignment of the upper rail and the middle rail.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is:

[0005] A three-section drawer slide for furniture includes a support frame, a lower slide mounted on the support frame, a middle slide mounted on the lower slide, and an upper slide mounted on the middle slide.

[0006] A first mounting groove is formed between the left side of the middle rail and the left side of the upper rail; a second mounting groove is formed between the right side of the middle rail and the right side of the upper rail; a third mounting groove is formed between the left side of the middle rail and the left side of the lower rail; a fourth mounting groove is formed between the right side of the middle rail and the right side of the lower rail; and a fifth mounting groove is formed between the lower side of the middle rail and the upper side of the lower rail.

[0007] An upper load-bearing device is provided between the upper rail and the middle rail, and a lower load-bearing device is provided between the lower rail and the middle rail. The upper load-bearing device is provided with load-bearing wheel sets located in the first mounting groove and the second mounting groove; the lower load-bearing device is provided with load-bearing wheel sets located in the third mounting groove, the fourth mounting groove and the fifth mounting groove.

[0008] A transmission gear is provided on the middle rail; a first transmission rack and a second transmission rack are respectively provided on the upper and lower load-bearing devices, which mesh with the upper and lower sides of the moving gear.

[0009] Preferably, the support is in two sets.

[0010] Preferably, the upper rail includes a first upper rail connector arranged horizontally, a second upper rail connector arranged to the left of the first upper rail connector, and a third upper rail connector arranged to the right of the first upper rail connector, wherein the second upper rail connector and the third upper rail connector extend vertically downward; the second upper rail connector is bent inward horizontally to form a fourth upper rail connector that extends horizontally.

[0011] Preferably, the lower rail includes a first lower rail connector arranged horizontally, a second lower rail connector arranged to the left of the first lower rail connector, and a third lower rail connector arranged to the right of the first lower rail connector, wherein the second lower rail connector extends vertically upward and bends horizontally inward to form a fourth lower rail connector that extends horizontally; the third lower rail connector extends vertically upward and bends inward to form a fifth lower rail connector.

[0012] Preferably, the center rail includes a first center rail connector arranged horizontally, a second center rail connector arranged to the left of the first center rail connector, and a third center rail connector arranged to the right of the first center rail connector. A fourth center rail connector is arranged between the second center rail connector and the first center rail connector. The fourth center rail connector is attached to the first center rail connector, with one end connected to the bottom of the second center rail connector and the other end connected to the lower end of the first center rail connector. The upper end of the second center rail connector extends horizontally outward to form a fifth center rail connector. The third center rail connector extends downward and outward in an arc shape.

[0013] Preferably, the first mounting groove is formed between the fifth middle rail connector, the second middle rail connector, the fourth upper rail connector, and the second upper rail connector;

[0014] The second mounting groove is formed between the first upper rail connector, the third upper rail connector, the first middle rail connector, and the second middle rail connector;

[0015] The third mounting groove is formed between the fourth lower rail connector, the second middle rail connector, the fourth middle rail connector, and the second lower rail connector.

[0016] The fourth mounting groove is formed between the third middle rail connector and the fifth lower rail connector;

[0017] The fifth mounting groove is formed between the first middle rail connector, the third middle rail connector, the first lower rail connector, and the second lower rail connector.

[0018] Preferably, the upper load-bearing device includes an upper load-bearing frame, a first load-bearing wheel group and a second load-bearing wheel group disposed on the upper load-bearing frame, wherein the first load-bearing wheel group is vertically disposed and located in the second mounting groove; the second load-bearing wheel group is also vertically disposed and located in the first mounting groove.

[0019] Preferably, the lower support device includes a lower support frame, a third set of support wheels, a fourth set of support wheels, and a fifth set of support wheels disposed on the lower support frame, wherein the third set of support wheels is vertically arranged and located in the third mounting groove; the fourth set of support wheels is located in the fourth mounting groove and consists of multiple sets of ball bearings; and the fifth set of support wheels is vertically arranged and located in the fifth mounting groove.

[0020] Preferably, the upper support frame is provided with a first guide wheel group and a second guide wheel group in the second mounting slot and the first mounting slot, respectively, and the first guide wheel group and the second guide wheel group are horizontally arranged; the lower support frame is provided with a third guide wheel group in the third mounting slot, and the third guide wheel group is horizontally arranged.

[0021] Preferably, the bracket is L-shaped.

[0022] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0023] The three-section drawer slide of this utility model uses a gear and rack transmission mechanism between the upper and middle rails, between the upper rail and the upper load-bearing roller group, between the middle and lower rails, and between the lower rail and the lower load-bearing roller group. Through the constraint relationship of the gear and rack transmission mechanism, the movement of the upper rail, the upper load-bearing roller group, the middle rail and the lower load-bearing roller group are mutually constrained, that is, the movement speed of the upper rail and the middle rail has a one-to-one correspondence, thereby avoiding problems such as overlapping sliding, collision or misalignment of the upper rail and the middle rail. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the three-section slide rail used in the furniture drawer of this utility model.

[0025] Figure 2 This is a side view of the three-section drawer slide used in the furniture drawer of this utility model.

[0026] Figure 3 An exploded view of the three-section drawer slide used in the furniture drawer of this utility model.

[0027] Figure 4 This is a structural diagram of the upper, middle, and lower rails of the three-section drawer slide used in the furniture drawer of this utility model.

[0028] Figure 5 and Figure 6 These are structural schematic diagrams of the upper and lower load-bearing wheel sets from two different perspectives. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0030] See Figures 1-6 The three-section drawer slide of the furniture of the present invention includes a bracket 1, a lower rail 4 disposed on the bracket 1, a middle rail 3 disposed on the lower rail 4, and an upper rail 2 disposed on the middle rail 3, wherein...

[0031] The bracket 1 consists of two sets, and each set of bracket 1 is L-shaped;

[0032] A first mounting groove B is formed between the left side of the middle rail 3 and the left side of the upper rail 2; a second mounting groove A is formed between the right side of the middle rail 3 and the right side of the upper rail 2; a third mounting groove C is formed between the left side of the middle rail 3 and the left side of the lower rail 4; a fourth mounting groove D is formed between the right side of the middle rail 3 and the right side of the lower rail 4; and a fifth mounting groove E is formed between the lower side of the middle rail 3 and the upper side of the lower rail 4.

[0033] An upper load-bearing device 5 is provided between the upper rail 2 and the middle rail 3, and a lower load-bearing device 6 is provided between the lower rail 4 and the middle rail 3. The upper load-bearing device 5 is provided with load-bearing wheel sets located in the first mounting groove B and the second mounting groove A; the lower load-bearing device 6 is provided with load-bearing wheel sets located in the third mounting groove C, the fourth mounting groove D and the fifth mounting groove E.

[0034] A transmission gear 12 is provided on the middle rail 3; a first transmission rack 10 and a second transmission rack 11 that mesh with the upper and lower sides of the transmission gear 12 are respectively provided on the upper load-bearing device 5 and the lower load-bearing device 6, wherein the first transmission rack 10 is installed on the upper load-bearing frame 501; and the second transmission rack 11 is installed on the lower load-bearing frame 601.

[0035] See Figures 1-6 The upper rail 2 includes a first upper rail connector 201 arranged horizontally, a second upper rail connector 202 arranged to the left of the first upper rail connector 201, and a third upper rail connector 203 arranged to the right of the first upper rail connector 201, wherein the second upper rail connector 202 and the third upper rail connector 203 extend vertically downward; the second upper rail connector 202 is bent inward horizontally to form a fourth upper rail connector 204 that extends horizontally.

[0036] See Figures 1-6The lower rail 4 includes a horizontally arranged first lower rail piece 401, a second lower rail piece 402 arranged to the left of the first lower rail piece 401, and a third lower rail piece 403 arranged to the right of the first lower rail piece 401. The second lower rail piece 402 extends vertically upward and bends horizontally inward to form a horizontally extended fourth lower rail piece 404. The third lower rail piece 403 extends vertically upward and bends inward to form a fifth lower rail piece 405.

[0037] See Figures 1-6 The center rail 3 includes a horizontally arranged first center rail connector 301, a second center rail connector 302 arranged to the left of the first center rail connector 301, and a third center rail connector 303 arranged to the right of the first center rail connector 301. A fourth center rail connector 304 is arranged between the second center rail connector 302 and the first center rail connector 301. The fourth center rail connector 304 is attached to the first center rail connector 301, and one end of it is connected to the bottom of the second center rail connector 302, while the other end is connected to the lower end of the first center rail connector 301. The upper end of the second center rail connector 302 extends horizontally outward to form a fifth center rail connector 305. The third center rail connector 303 extends downward and outward in an arc shape.

[0038] See Figures 1-6 The first mounting groove A is formed between the fifth middle rail connector 305, the second middle rail connector 302, the fourth upper rail connector 204, and the second upper rail connector 202.

[0039] The second mounting groove B is formed between the first upper rail connector 201, the third upper rail connector 203, the first middle rail connector 301, and the second middle rail connector 302;

[0040] The third mounting groove C is formed between the fourth lower rail connector 404, the second middle rail connector 302, the fourth middle rail connector 304, and the second lower rail connector 402;

[0041] The fourth mounting groove D is formed between the third middle rail connector 303 and the fifth lower rail connector 405;

[0042] The fifth mounting groove E is formed between the first middle rail connector 301, the third middle rail connector 303, the first lower rail connector 401, and the second lower rail connector 402.

[0043] See Figures 1-6 The upper load-bearing device 5 includes an upper load-bearing frame 501, a first load-bearing wheel group 502 and a second load-bearing wheel group 503 disposed on the upper load-bearing frame 501, wherein the first load-bearing wheel group 502 is vertically disposed and located in the second mounting groove B; the second load-bearing wheel group 503 is also vertically disposed and located in the first mounting groove A.

[0044] The lower support device 6 includes a lower support frame 601, a third support wheel set 602, a fourth support wheel set 604, and a fifth support wheel set 603 disposed on the lower support frame 601. The third support wheel set 602 is vertically arranged and located in the third mounting groove C; the fourth support wheel set 604 is located in the fourth mounting groove D and consists of multiple sets of ball bearings; the fifth support wheel set 603 is vertically arranged and located in the fifth mounting groove E.

[0045] By setting the first load-bearing wheel group 502, the second load-bearing wheel group 503, the third load-bearing wheel group 602, the fourth load-bearing wheel group 604 and the fifth load-bearing wheel group 603, the middle rail 3 and the upper rail 2 are supported and limited vertically, thereby improving the load-bearing performance of the three-section slide rail of this utility model.

[0046] In this embodiment, the first load-bearing wheel group 502, the second load-bearing wheel group 503, the third load-bearing wheel group 602 and the fifth load-bearing wheel group 603 are all rollers.

[0047] See Figures 1-6 The upper support frame 501 is provided with a first guide wheel group 7 and a second guide wheel group 8 in the second mounting groove B and the first mounting groove A, respectively, and the first guide wheel group 7 and the second guide wheel group 8 are horizontally arranged; the lower support frame 601 is provided with a third guide wheel group 9 in the third mounting groove C, and the third guide wheel group 9 is horizontally arranged.

[0048] By setting the first guide wheel group 7, the second guide wheel group 8, and the third guide wheel group 9, the left and right limits of the middle rail 3 and the upper rail 2 can be achieved.

[0049] See Figures 1-6 The three-section slide rail used in the furniture drawer of this utility model has a gear and rack transmission mechanism installed between the upper rail 2 and the middle rail 3, between the upper rail 2 and the upper load-bearing device 5, between the middle rail 3 and the lower rail 4, and between the lower rail 4 and the lower load-bearing device 6. (That is, a transmission gear 12 is installed on the middle rail 3; a first transmission rack 10 and a second transmission rack 11 that mesh with the upper and lower sides of the transmission gear 12 are respectively installed on the upper load-bearing device 5 and the lower load-bearing device 6). Through the constraint relationship of the gear and rack transmission mechanism, the movement of the upper rail 2, the upper load-bearing device 5, the middle rail 3 and the lower load-bearing device 6 are mutually constrained, that is, the movement speed of the upper rail 2 and the middle rail 3 has a one-to-one correspondence, thereby avoiding problems such as overlapping sliding, collision or misalignment of the middle rail 3 between the upper rail 2 and the middle rail 3.

[0050] The above are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above content. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A three-section drawer slide for furniture, comprising a support, a lower rail disposed on the support, a middle rail disposed on the lower rail, and an upper rail disposed on the middle rail, characterized in that, A first mounting groove is formed between the left side of the middle rail and the left side of the upper rail; a second mounting groove is formed between the right side of the middle rail and the right side of the upper rail; a third mounting groove is formed between the left side of the middle rail and the left side of the lower rail; a fourth mounting groove is formed between the right side of the middle rail and the right side of the lower rail; and a fifth mounting groove is formed between the lower side of the middle rail and the upper side of the lower rail. An upper load-bearing device is provided between the upper rail and the middle rail, and a lower load-bearing device is provided between the lower rail and the middle rail. The upper load-bearing device is provided with load-bearing wheel sets located in the first mounting groove and the second mounting groove; the lower load-bearing device is provided with load-bearing wheel sets located in the third mounting groove, the fourth mounting groove and the fifth mounting groove. A transmission gear is provided on the middle rail; a first transmission rack and a second transmission rack are respectively provided on the upper and lower load-bearing devices, which mesh with the upper and lower sides of the moving gear.

2. The three-section drawer slide used in furniture drawers according to claim 1, characterized in that, The support consists of two sets.

3. The three-section drawer slide used in furniture drawers according to claim 1, characterized in that, The upper rail includes a first upper rail connector arranged horizontally, a second upper rail connector arranged to the left of the first upper rail connector, and a third upper rail connector arranged to the right of the first upper rail connector, wherein the second upper rail connector and the third upper rail connector extend vertically downward; the second upper rail connector is bent inward horizontally to form a fourth upper rail connector that extends horizontally.

4. The three-section drawer slide used in furniture drawers according to claim 3, characterized in that, The lower rail includes a first lower rail piece arranged horizontally, a second lower rail piece arranged to the left of the first lower rail piece, and a third lower rail piece arranged to the right of the first lower rail piece. The second lower rail piece extends vertically upward and bends horizontally inward to form a fourth lower rail piece that extends horizontally. The third lower rail piece extends vertically upward and bends inward to form a fifth lower rail piece.

5. The three-section drawer slide used in furniture drawers according to claim 4, characterized in that, The center rail includes a first center rail connector arranged horizontally, a second center rail connector arranged to the left of the first center rail connector, and a third center rail connector arranged to the right of the first center rail connector. A fourth center rail connector is arranged between the second center rail connector and the first center rail connector. The fourth center rail connector is attached to the first center rail connector, with one end connected to the bottom of the second center rail connector and the other end connected to the lower end of the first center rail connector. The upper end of the second center rail connector extends horizontally outward to form a fifth center rail connector. The third center rail connector extends downward and outward in an arc shape.

6. The three-section drawer slide used in furniture drawers according to claim 5, characterized in that, The first mounting groove is formed between the fifth middle rail connector, the second middle rail connector, the fourth upper rail connector, and the second upper rail connector. The second mounting groove is formed between the first upper rail connector, the third upper rail connector, the first middle rail connector, and the second middle rail connector; The third mounting groove is formed between the fourth lower rail connector, the second middle rail connector, the fourth middle rail connector, and the second lower rail connector. The fourth mounting groove is formed between the third middle rail connector and the fifth lower rail connector; The fifth mounting groove is formed between the first middle rail connector, the third middle rail connector, the first lower rail connector, and the second lower rail connector.

7. The three-section drawer slide used in furniture drawers according to claim 6, characterized in that, The upper load-bearing device includes an upper load-bearing frame, a first load-bearing wheel group and a second load-bearing wheel group disposed on the upper load-bearing frame, wherein the first load-bearing wheel group is vertically disposed and located in the second mounting groove; the second load-bearing wheel group is also vertically disposed and located in the first mounting groove.

8. The three-section drawer slide used in furniture drawers according to claim 7, characterized in that, The lower load-bearing device includes a lower load-bearing frame, a third load-bearing wheel group, a fourth load-bearing wheel group, and a fifth load-bearing wheel group mounted on the lower load-bearing frame. The third load-bearing wheel group is vertically arranged and located in the third mounting groove. The fourth load-bearing wheel group is located in the fourth mounting groove and consists of multiple sets of ball bearings. The fifth load-bearing wheel group is vertically arranged and located in the fifth mounting groove.

9. The three-section drawer slide used in furniture drawers according to claim 8, characterized in that, The upper support frame is provided with a first guide wheel group and a second guide wheel group in the second mounting slot and the first mounting slot, respectively, and the first guide wheel group and the second guide wheel group are horizontally arranged; the lower support frame is provided with a third guide wheel group in the third mounting slot, and the third guide wheel group is horizontally arranged.

10. The three-section drawer slide used in furniture drawers according to claim 9, characterized in that, The bracket is L-shaped.