Three-section hidden type synchronous sliding rail

Abstract

The utility model relates to a three-section hidden type synchronous sliding rail which comprises an upper rail with an upper rack, a middle rail with a gear and a lower rail with a lower rack, and the gear is meshed with the upper rack and the lower rack at the same time. The upper rack comprises a mounting part and a tooth part, the tooth part is arranged on the first side of the mounting part, a locking groove is formed in the second side of the mounting part, the locking groove is sequentially provided with a second supporting face, a first connecting face and a first supporting face in the direction from the second side of the mounting part to the first side of the mounting part, and the first supporting face is the bottom face of the locking groove; the first supporting face and the second supporting face are parallel to each other and are not located on the same horizontal plane, the two ends of the first connecting face are connected with the first supporting face and the second supporting face respectively, and the first connecting face obliquely intersects with the first supporting face and the second supporting face. A locking piece with deformability is arranged on the inner wall face of the upper rail, the locking piece is embedded in the locking groove, and the locking piece abuts against the second supporting face, the first connecting face and the first supporting face.

Description

Technical Field

[0001] The utility model relates to a drawer slide rail, in particular to a three-section hidden synchronous slide rail. Background Art

[0002] Chinese patent No. CN201420667814.6 discloses a three-section synchronous hidden slide rail, which includes a movable rail, a middle rail, a fixed rail and a damping mechanism; an upper rack and an upper roller holder with rollers are arranged between the movable rail and the middle rail; a split lower roller holder with rollers is arranged between the middle rail and the fixed rail, and a rack is arranged on the surface of the lower roller holder; a gear assembly is meshed between the upper rack and the lower roller holder, and the gear assembly controls the movable rail and the middle rail to run synchronously or staggered according to the magnitude of the applied force; the damping mechanism is assembled on the fixed rail.

[0003] Among them, an upper rack is installed on the top surface of the movable rail; a number of locking mechanisms protrude outward from the side of the upper rack, including a fixed column and a spring sheet, the top of the fixed column extends outward, and the spring sheet pops up outward, and a corresponding assembly hole is arranged on the side of the movable rail, and the assembly hole corresponding to the fixed column is in a convex shape, and the fixed column passes through the large side and then moves to the narrow side to complete the lock; the assembly hole corresponding to the spring sheet is square, and the spring sheet extends into the square assembly hole when it is buckled and rests against its side wall; the upper rack is connected by two parts.

[0004] However, the assembly structure of the movable rail and the upper rack is relatively complicated, resulting in low assembly efficiency, and the processing difficulty of the upper rack and the movable rail is relatively large, which affects the production efficiency. In addition, the upper rack is segmented, and the overall installation accuracy is poor. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a three-section hidden synchronous slide rail, which has the advantages of low processing difficulty, high assembly efficiency and high production efficiency.

[0006] A three-section hidden synchronous slide rail, the three-section hidden synchronous slide rail comprises an upper rail, a middle rail and a lower rail, the middle rail is slidably arranged on the lower rail, the upper rail is slidably arranged on the middle rail, the upper rail is detachably mounted with an upper rack, the middle rail is rotatably mounted with a gear, the lower rail is provided with a lower rack, and the gear is meshed with the upper rack and the lower rack at the same time. Wherein, the upper rack comprises a mounting portion and a tooth portion, the mounting portion has a first side and a second side opposite to the first side, the tooth portion is arranged on the first side of the mounting portion, the second side of the mounting portion is provided with a locking groove, along the direction from the second side of the mounting portion to the first side thereof, the locking groove is provided with a second supporting surface, a first connecting surface and a first supporting surface in sequence, the first supporting surface is the bottom surface of the locking groove, the first supporting surface and the second supporting surface are parallel to each other and are not on the same horizontal plane, the two ends of the first connecting surface are respectively connected with the first supporting surface and the second supporting surface, and the first connecting surface and the first supporting surface are obliquely intersected, and the first connecting surface and the second supporting surface are obliquely intersected. The inner wall surface of the upper rail is provided with a locking piece with deformation capability, the locking piece is embedded in the locking groove, and the locking piece is against the second supporting surface, the first connecting surface, and the first supporting surface.

[0007] Furthermore, the locking groove forms a notch on the surface of the mounting portion into which the locking piece can be embedded, and the second supporting surface is located below the notch of the locking groove.

[0008] Furthermore, a second connecting surface is provided between the first connecting surface and the first supporting surface, the second connecting surface intersects the first supporting surface perpendicularly, and the second connecting surface intersects the first connecting surface obliquely.

[0009] Furthermore, a positioning protrusion is respectively provided on both sides of the locking groove, and the locking piece is located between the two positioning protrusions.

[0010] Furthermore, the two positioning protrusions are respectively located on two sides of the second supporting surface.

[0011] Furthermore, the upper rack has three locking grooves, which are respectively arranged at the front, middle and rear of the upper rack.

[0012] Furthermore, the locking piece and the upper rail are integrally made of metal material, and the upper rack is integrally formed of ABS plastic.

[0013] Furthermore, a plurality of grooves are arranged at the bottom of the upper rack.

[0014] Furthermore, the middle rail is slidably mounted with an upper roller holder, and the upper roller holder is arranged between the middle rail and the upper rail; the lower rail is slidably mounted with a lower roller holder, and the lower roller holder is arranged between the lower rail and the middle rail.

[0015] Furthermore, three first rollers are rotatably arranged on the top surface of the upper roller holder, and the first rollers are in contact with the middle rail and the upper rail at the same time; two balls are rotatably arranged on the left and right sides of the upper roller holder, and the balls are in contact with the middle rail and the upper rail at the same time; three second rollers are rotatably arranged on the front and rear ends of the top surface of the lower roller holder, and the second rollers are in contact with the lower rail and the middle rail at the same time; two third rollers are rotatably arranged on the front and rear ends of the left side surface of the lower roller holder, and one third roller is rotatably arranged on the front and rear ends of the right side surface of the lower roller holder, and the third roller is in contact with the lower rail and the middle rail at the same time; the lower rack is arranged on the top surface of the lower roller holder, and the lower rack and the lower roller holder are integrally formed of PA plastic.

[0016] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an exploded schematic diagram of the three-section hidden synchronous slide rail described in the first embodiment;

[0018] Figure 2 It is a schematic diagram of the assembly of the upper rail and the upper rack described in the first embodiment;

[0019] Figure 3 is a three-dimensional diagram of the upper rack described in Example 1;

[0020] Figure 4 for Figure 3 An enlarged schematic diagram of A in FIG.

[0021] Figure 5 It is a bottom schematic diagram of the upper rack described in Example 1;

[0022] Figure 6 It is an exploded schematic diagram of the three-section hidden synchronous slide rail described in the second embodiment;

[0023] Reference numerals:

[0024] 1. Upper rail; 11. Locking piece; 2. Middle rail; 3. Lower rail; 4. Upper rack; 41. Mounting portion; 42. Tooth portion; 43. Locking groove; 431. First supporting surface; 432. Second supporting surface; 433. First connecting surface; 434. Second connecting surface; 435. Positioning protrusion; 44. Groove; 5. Gear; 6. Lower rack; 7. Upper roller holder; 71. First roller; 72. Ball; 8. Lower roller holder; 81. Second roller; 82. Third roller. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0026] It should be understood that, in the description of the present application, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, that is, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, unless otherwise specified, "multiple" means two or more.

[0027] It should be noted that, in the description of this application, unless otherwise clearly specified and limited, the terms "disposed", "connected", "connected", and "hollow" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] Embodiment 1

[0029] See also Figure 1 and Figure 2The three-section hidden synchronous slide rail of the present embodiment comprises an upper rail 1, a middle rail 2 and a lower rail 3. The lower rail 3 is used for fixed installation in the cabinet, the middle rail 2 is slidably arranged on the lower rail 3, and the upper rail 1 is slidably arranged on the middle rail 2. In addition, an upper rack 4 is detachably installed on the inner side of the upper rail 1, a gear 5 is rotatably installed on the upper surface of the middle rail 2, and a lower rack 6 is arranged on the upper surface of the lower rail 3, and the gear 5 is meshed with the upper rack 4 and the lower rack 6 at the same time.

[0030] See also Figure 3 and Figure 4 The upper rack 4 includes a mounting portion 41 and a tooth portion 42 arranged on one side of the mounting portion 41. A locking groove 43 is arranged on the upper surface of the mounting portion 41, one end of the locking groove 43 is a closed end, and the other end of the locking groove 43 extends to the side of the mounting portion 41 and is an open end. From the closed end to the open end of the locking groove 43, the locking groove 43 has a first supporting surface 431, a first connecting surface 433, and a second supporting surface 432 in sequence. The first supporting surface 431 is the bottom surface of the locking groove 43. The first supporting surface 431 and the second supporting surface 432 are parallel to each other and are not on the same horizontal plane, and the two ends of the first connecting surface 433 are connected with the first supporting surface 431 and the second supporting surface 432 respectively, so that the first connecting surface 433 and the first supporting surface 431 are obliquely intersected, and the first connecting surface 433 and the second supporting surface 432 are obliquely intersected.

[0031] See also Figures 2 to 4 A locking piece 11 with deformation capability is provided on the inner wall surface of the upper rail 1, and the locking piece 11 is embedded in the locking groove 43 of the upper rack 4. Moreover, the locking piece 11 is deformed accordingly through the inner contour of the locking groove 43, so that the upper rack 4 is firmly fixed on the upper rail 1. Specifically, the left wall surface of the upper rail 1 defines the freedom of the upper rack 4 to move to the left, the first connecting surface 433 defines the freedom of the upper rack 4 to move to the right, the side wall of the locking groove 43 defines the freedom of the upper rack 4 to move forward and backward, the upper wall surface of the upper rail 1 defines the freedom of the upper rack 4 to move upward, and the first supporting surface 431 and the second supporting surface 432 define the freedom of the upper rack 4 to move downward.

[0032] In this embodiment, the locking piece 11 and the upper rail 1 are made of metal material in one piece, and the locking piece 11 is made of metal material and is relatively thin, so that the locking piece 11 has a certain deformation ability. In addition, the upper rack 4 is formed of ABS plastic in one piece, and in order to ensure that the upper rack 4 is firmly fixed on the upper rail 1, the upper rack 4 has three locking grooves 43, and the three locking grooves 43 are respectively arranged at the front, middle and rear of the upper rack 4.

[0033] Furthermore, in order to more firmly fix the upper rack 4 on the upper rail 1 , the second supporting surface 432 is located below the notch of the locking groove 43 , so that the portion of the locking piece 11 abutting against the second supporting surface 432 is also located in the locking groove 43 .

[0034] Furthermore, in order to further improve the firmness between the upper rack 4 and the upper rail 1, a second connecting surface 434 is arranged between the first connecting surface 433 and the first supporting surface 431, and the lower end of the second connecting surface 434 intersects with the first supporting surface 431 vertically, and the upper end of the second connecting surface 434 intersects with the first connecting surface 433 at an angle.

[0035] In addition, in order to pre-position the locking piece 11 and the locking groove 43 to improve assembly efficiency, a positioning protrusion 435 is provided on both sides of the locking groove 43, and the locking piece 11 is located between the two positioning protrusions 435. The relative position between the locking piece 11 and the upper rack 4 is determined by the two positioning protrusions 435, which facilitates rapid assembly. Further, the two positioning protrusions 435 are respectively located on both sides of the second supporting surface 432 and close to the open end of the locking groove 43.

[0036] Furthermore, in order to improve the overall strength of the upper rack 4 so as to facilitate the integral formation, see Figure 5 , a plurality of grooves 44 are provided at the bottom of the upper rack 4. In this embodiment, a plurality of grooves 44 are provided at the bottom of the mounting portion 41 and are distributed at equal intervals.

[0037] Embodiment 2

[0038] See also Figure 6 The three-section hidden synchronous slide rail of this embodiment is different from the three-section hidden synchronous slide rail described in Example 1 in that: the middle rail 2 is slidably installed with an upper roller holder 7, and the upper roller holder 7 is arranged between the middle rail 2 and the upper rail 1; the lower rail 3 is slidably installed with a lower roller holder 8, and the lower roller holder 8 is arranged between the lower rail 3 and the middle rail 2.

[0039] In this embodiment, two upper roller holders 7 are slidably mounted on the middle rail 2, and the two upper roller holders 7 are located on both sides of the gear 5. Three first rollers 71 are rotatably arranged on the top surface of the upper roller holder 7, and the first rollers 71 are in contact with the middle rail 2 and the upper rail 1 at the same time to reduce the sliding friction between the middle rail 2 and the upper rail 1. Two balls 72 are rotatably arranged on the left and right sides of the upper roller holder 7, and the balls 72 are in contact with the middle rail 2 and the upper rail 1 at the same time to further reduce the sliding friction between the middle rail 2 and the upper rail 1.

[0040] Furthermore, in this embodiment, three second rollers 81 are rotatably provided at both front and rear ends of the top surface of the lower roller holder 8, and the second rollers 81 are in contact with the lower rail 3 and the middle rail 2 at the same time to reduce the sliding friction between the lower rail 3 and the middle rail 2. Two third rollers 82 are rotatably provided at both front and rear ends of the left side surface of the lower roller holder 8, and one third roller 82 is rotatably provided at both front and rear ends of the right side surface of the lower roller holder 8, and the third roller 82 is in contact with the lower rail 3 and the middle rail 2 at the same time to further reduce the sliding friction between the lower rail 3 and the middle rail 2.

[0041] In addition, the lower rack 6 is arranged on the top surface of the lower roller holder 8, and the lower rack 6 and the lower roller holder 8 are integrally formed by PA plastic.

[0042] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A three-section hidden synchronous slide rail, comprising an upper rail (1), a middle rail (2), and a lower rail (3), wherein the middle rail (2) is slidably arranged on the lower rail (3), and the upper rail (1) is slidably arranged on the middle rail (2), and the upper rail (1) is detachably mounted with an upper rack (4), the middle rail (2) is rotatably mounted with a gear (5), and the lower rail (3) is provided with a lower rack (6), and the gear (5) is meshed with the upper rack (4) and the lower rack (6) at the same time, characterized in that: The upper rack (4) comprises a mounting portion (41) and a tooth portion (42); the mounting portion (41) has a first side and a second side opposite to the first side; the tooth portion (42) is arranged on the first side of the mounting portion (41); the second side of the mounting portion (41) is provided with a locking groove (43); along the direction from the second side of the mounting portion (41) to the first side thereof, the locking groove (43) is provided with a second supporting surface (432), a first connecting surface (433), and a first supporting surface (431) in sequence; the first supporting surface (431) is the bottom surface of the locking groove (43); the first supporting surface (431) and the second supporting surface (432) are parallel to each other and are not on the same horizontal plane; the two ends of the first connecting surface (433) are connected to the first supporting surface (431) and the second supporting surface (432) respectively; the first connecting surface (433) and the first supporting surface (431) are obliquely intersected; and the first connecting surface (433) and the second supporting surface (432) are obliquely intersected; The inner wall surface of the upper rail (1) is provided with a locking piece (11) with deformation capability, the locking piece (11) is embedded in the locking groove (43), and the locking piece (11) abuts against the second supporting surface (432), the first connecting surface (433), and the first supporting surface (431).

2. The three-section hidden synchronous slide rail according to claim 1, characterized in that: The locking groove (43) forms a notch on the surface of the mounting portion (41) into which the locking piece (11) can be embedded, and the second supporting surface (432) is located below the notch of the locking groove (43).

3. The three-section hidden synchronous slide rail according to claim 1, characterized in that: A second connecting surface (434) is provided between the first connecting surface (433) and the first supporting surface (431), the second connecting surface (434) intersects the first supporting surface (431) perpendicularly, and the second connecting surface (434) intersects the first connecting surface (433) obliquely.

4. The three-section hidden synchronous slide rail according to claim 1, characterized in that: A positioning protrusion (435) is respectively provided on both sides of the locking groove (43), and the locking piece (11) is located between the two positioning protrusions (435).

5. The three-section hidden synchronous slide rail according to claim 4, characterized in that: The two positioning protrusions (435) are respectively located on two sides of the second supporting surface (432).

6. The three-section hidden synchronous slide rail according to claim 1, characterized in that: The upper rack (4) has three locking grooves (43), and the three locking grooves (43) are respectively arranged at the front, middle and rear of the upper rack (4).

7. The three-section hidden synchronous slide rail according to claim 1, characterized in that: The locking piece (11) and the upper rail (1) are integrally made of metal material, and the upper rack (4) is integrally formed of ABS plastic.

8. The three-section hidden synchronous slide rail according to claim 7, characterized in that: A plurality of grooves (44) are arranged at the bottom of the upper rack (4).

9. The three-section hidden synchronous slide rail according to claim 1, characterized in that: The middle rail (2) is slidably mounted with an upper roller retainer (7), and the upper roller retainer (7) is arranged between the middle rail (2) and the upper rail (1); the lower rail (3) is slidably mounted with a lower roller retainer (8), and the lower roller retainer (8) is arranged between the lower rail (3) and the middle rail (2).

10. The three-section hidden synchronous slide rail according to claim 9, characterized in that: Three first rollers (71) are rotatably arranged on the top surface of the upper roller holder (7), and the first rollers (71) are in contact with the middle rail (2) and the upper rail (1) at the same time; two balls (72) are rotatably arranged on the left and right side surfaces of the upper roller holder (7), and the balls (72) are in contact with the middle rail (2) and the upper rail (1) at the same time; Three second rollers (81) are rotatably provided at both front and rear ends of the top surface of the lower roller holder (8), and the second rollers (81) are in contact with the lower rail (3) and the middle rail (2) at the same time; two third rollers (82) are rotatably provided at both front and rear ends of the left side surface of the lower roller holder (8), and one third roller (82) is rotatably provided at both front and rear ends of the right side surface of the lower roller holder (8), and the third roller (82) is in contact with the lower rail (3) and the middle rail (2) at the same time; The lower rack (6) is arranged on the top surface of the lower roller retaining frame (8), and the lower rack (6) and the lower roller retaining frame (8) are integrally formed of PA plastic.

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