A decelerating gear type guiding mechanism for drawer pulling

Abstract

The present invention discloses a reduction gear type guiding mechanism for drawing and pulling out a drawer, comprising a fixed rail assembly, a movable rail assembly and an intermediate rail assembly, wherein a movable rail rack is fixed on the movable rail assembly, and an intermediate rail rack opposite to the movable rail rack is fixed on the intermediate rail assembly, the intermediate rail rack and the movable rail rack are arranged along the sliding direction of the movable rail assembly and the intermediate rail assembly, the intermediate rail rack and the movable rail rack are connected by a reduction mechanism, and the reduction mechanism is fixedly mounted on the fixed rail assembly through a connecting plate assembly; thus, the movable rail assembly and the intermediate rail assembly provided by the present invention can not only achieve the effect of synchronous operation, but also realize differential motion, the motion is smoother and more orderly, there will be no leakage of the intermediate rail assembly, the noise when the slide rail is opened or closed is reduced, and the entire opening or closing force is uniform, so that it has a better use experience.

Description

Technical Field

[0001] The invention specifically relates to a drawer guide rail device, in particular to a reduction gear type guide mechanism for drawing and pulling a drawer. Background Art

[0002] A drawer with three-section hidden sliding rails generally includes an outer rail, a middle rail and a fixed rail. During the process of pulling out or closing the drawer, the pulling force or closing force is uneven and the speed is inconsistent. In addition, during the operation of the drawer, the speed is uneven, which will produce abnormal noise and provide a poor user experience. Moreover, the outer rail and the middle rail are connected to each other by sliding, and the relative speed cannot be guaranteed to be uniform. There may be problems such as overlapping sliding out and in, collision or leakage of the misaligned middle rail.

[0003] At present, there are many drawer guide mechanisms with linkage mechanisms installed between the middle rail and the outer rail on the market. However, the middle rail and the outer rail generally slide at a synchronous speed. When the drawer is pulled out suddenly, the linkage mechanism cannot move quickly, and problems such as setbacks or abnormal noises may occur. Therefore, to address such problems, we need a drawer multi-section guide device that can reduce the speed and force between the multi-section guide rails of the drawer during the process of opening or closing the drawer, so that the speed and force between the multi-section guide rails of the drawer can remain basically uniform and reduce abnormal noises. Summary of the invention

[0004] The object of the present invention is to provide a reduction gear type guide mechanism for drawing a drawer, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A reduction gear type guiding mechanism for drawing and pulling out a drawer comprises a fixed rail assembly, a movable rail assembly and an intermediate rail assembly, the fixed rail assembly is slidably clamped to the intermediate rail assembly, the intermediate rail assembly is slidably clamped to the movable rail assembly used to be fixed to the drawer, sliding assemblies are provided in the clamping interlayer between the fixed rail assembly and the intermediate rail assembly, and in the clamping interlayer between the intermediate rail assembly and the movable rail assembly, a movable rail rack is fixed to the movable rail assembly, an intermediate rail rack opposite to the movable rail rack is fixed to the intermediate rail assembly, the intermediate rail rack and the movable rail rack are arranged along the sliding direction of the movable rail assembly and the intermediate rail assembly, the intermediate rail rack and the movable rail rack are connected through a reduction mechanism, and the reduction mechanism is fixedly mounted on the fixed rail assembly through a connecting plate assembly.

[0007] Further solution: The sliding assembly includes an upper bead nest assembly that is slidably clamped between the movable rail assembly and the intermediate rail assembly, and a lower bead nest assembly that is slidably clamped between the fixed rail assembly and the intermediate rail assembly. Through holes are respectively formed in the plate surfaces of the upper bead nest assembly and the lower bead nest assembly, and ball grooves that penetrate up and down are formed in the through holes. Ball bearings that are respectively in rolling contact with the inner walls of the interlayers between the movable rail assembly and the intermediate rail assembly and between the fixed rail assembly and the intermediate rail assembly are rotatably fixed in the ball grooves.

[0008] Even further solution: A sliding clamping plate is vertically fixed to the outer side edge of the fixed rail assembly. The cross-section of the sliding clamping plate is an inverted L shape that bends inward. The lower bead nest assembly is a square shape with an opening at the bottom. The lower bead nest assembly wraps around the top surface and the side of the sliding clamping plate, and the entire intermediate rail assembly is slidably sleeved above the sliding clamping plate through the lower bead nest assembly.

[0009] Even further solution: The gear reduction mechanism includes a reduction gear, a linkage gear, and a transmission gear. The transmission gear and the linkage gear are jointly fixed on a rotating shaft. The rotating shaft is rotatably fixed on the plate surface of the connecting plate assembly. The reduction gear is rotatably fixed on one side of the linkage gear and the transmission gear through the rotating shaft. The connecting plate assembly is fixedly connected to the fixed rail assembly. The transmission gear is meshed with the movable rail rack. The linkage gear is meshed with the reduction gear. The reduction gear is meshed with the intermediate rail rack. The gear radii and tooth grooves of the transmission gear and the reduction gear are the same. The gear radius of the linkage gear is smaller than the gear radius of the reduction gear.

[0010] Even further solution: The movable rail rack is fixed at the top position of the outer side wall of the movable rail assembly. A rack mounting plate is vertically fixed to the bottom of the outer side wall of the intermediate rail assembly. The intermediate rail rack is fixed at the top of the rack mounting plate. A gear plate is vertically fixed to the bottom of the outer side wall of the fixed rail assembly. The gear plate is located at the bottom of the rack mounting plate and is horizontally parallel to the rack mounting plate. An installation plate is bent upward from the outer side edge of the gear plate. The installation plate is vertically arranged on the outer sides of the movable rail rack and the intermediate rail rack. The reduction gear mechanism is installed on the inner plate surface of the installation plate.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention is provided with a transmission connection between the movable rail assembly and the intermediate rail assembly through the movable rail rack, the intermediate rail rack, and the reduction gear mechanism. The movable rail assembly and the intermediate rail assembly can not only achieve the effect of synchronous operation, but also achieve differential motion. The motion is smoother and more orderly, and there will be no situation where the intermediate rail assembly leaks outside. The noise during the opening or closing of the slide rail is reduced, and the entire opening or closing force is uniform, providing a better user experience. Description of the Drawings

[0012] Figure 1The figure is a schematic diagram of the structure of the reduction gear type guide mechanism for drawing out the drawer.

[0013] Figure 2 It is a schematic structural diagram of the radial cross section of the reduction gear type guide mechanism for drawing out the drawer.

[0014] Figure 3 It is a structural schematic diagram of the reduction mechanism in the reduction gear type guide mechanism for drawing a drawer.

[0015] Figure 4 It is a structural schematic diagram of the reduction gear type guide mechanism for pulling out a drawer when it is installed with the drawer in the drawer groove of the cabinet.

[0016] Figure 5 A partial enlarged view of the upper bead nest assembly of the reduction gear guide mechanism for drawer pull-out.

[0017] In the figure: fixed rail assembly 1, sliding clamping plate 10, gear plate 11, reduction gear 12, linkage gear 13, transmission gear 14, movable rail assembly 2, movable rail rack 20, upper ball nest assembly 3, ball groove 30, ball 31, middle rail assembly 4, middle rail rack 40, rack mounting plate 41, lower ball nest assembly 5, buffer assembly 6. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example 1

[0020] See also Figures 1 to 5 In an embodiment of the present invention, a reduction gear guide mechanism for drawer pulling includes a fixed rail assembly 1, a movable rail assembly 2 and an intermediate rail assembly 4, the fixed rail assembly 1 is slidably connected to the intermediate rail assembly 4, the intermediate rail assembly 4 is slidably connected to the movable rail assembly 2 fixed to the drawer, the fixed rail assembly 1 and the intermediate rail assembly 4 are connected in an interlayer, and the intermediate rail assembly 4 and the movable rail assembly 2 are connected in an interlayer. A sliding assembly is provided, a movable rail rack 20 is fixed on the movable rail assembly 2, and an intermediate rail rack 40 opposite to the movable rail rack 20 is fixed on the intermediate rail assembly 4. The intermediate rail rack 40 and the movable rail rack 20 are arranged along the sliding direction of the movable rail assembly 2 and the intermediate rail assembly 4, and the intermediate rail rack 40 and the movable rail rack 20 are connected through a reduction mechanism, and the reduction mechanism is fixedly mounted on the fixed rail assembly 1 through a connecting plate assembly.

[0021] The sliding assembly includes an upper bead nest assembly 3 that is slidably clamped between the movable rail assembly 2 and the intermediate rail assembly 4, and a lower bead nest assembly 5 that is slidably clamped between the fixed rail assembly 1 and the intermediate rail assembly 4. Through holes 30 that penetrate vertically are respectively formed on the plate surfaces of the upper bead nest assembly 3 and the lower bead nest assembly 5. Ball bearings 31 that are rotatably fixed in the through holes 30 are respectively in rolling contact with the inner walls of the interlayers between the movable rail assembly 2 and the intermediate rail assembly 4, and between the fixed rail assembly 1 and the intermediate rail assembly 4. The provided ball bearings 31 support the sliding between the outer wall of the fixed rail assembly 1 and the inner wall of the intermediate rail assembly 4, and between the inner wall of the movable rail assembly 2 and the outer wall of the intermediate rail assembly 4, ensuring that the intermediate rail assembly 4 can slide on the fixed rail assembly 1, and ensuring that the movable rail assembly 2 can slide on the intermediate rail assembly 4.

[0022] A sliding clamping plate 10 is vertically fixed to the outer side of the fixed rail assembly 1. The cross-section of the sliding clamping plate 10 is an inverted L shape that bends inward. The lower bead nest assembly 5 is in a square shape with an opening at the bottom. The lower bead nest assembly 5 wraps around the top surface and the side of the sliding clamping plate 10. The entire intermediate rail assembly 4 is slidably sleeved above the sliding clamping plate 10 through the lower bead nest assembly 5. The provided semi-square sliding clamping plate 10 and the square-shaped lower bead nest assembly 5 can well slidably clamp the intermediate rail assembly 4 and the fixed rail assembly 1 as a whole, reducing the sliding resistance and improving the smoothness of the sliding of the intermediate rail assembly 4 on the fixed rail assembly 1.

[0023] The gear reduction mechanism includes a reduction gear 12, a linkage gear 13, and a transmission gear 14. The transmission gear 14 and the linkage gear 13 are fixedly mounted on a rotating shaft together. The rotating shaft is rotatably fixed on the plate surface of the connecting plate assembly. The reduction gear 12 is rotatably fixed on one side of the linkage gear 13 and the transmission gear 14 through a rotating shaft. The connecting plate assembly is fixedly connected to the fixed rail assembly 1. The transmission gear 14 is meshed with the movable rail rack 20. The linkage gear 13 is meshed with the reduction gear 12. The reduction gear 12 is meshed with the intermediate rail rack 40. The gear radii and tooth grooves of the transmission gear 14 and the reduction gear 12 are the same. The gear radius of the linkage gear 13 is smaller than that of the reduction gear 12. When the movable rail assembly 2 is pulled during the drawer pulling process, the movable rail rack 20 drives the transmission gear 14 to rotate. The transmission gear 14 drives the linkage gear 13 to rotate. The linkage gear 13 drives the reduction gear 12 to rotate. The reduction gear 12 is meshed with the intermediate rail rack 40. Since the intermediate rail rack 40 is integrally fixedly installed on the intermediate rail assembly 4 and the intermediate rail assembly 4 is slidably clamped on the fixed rail assembly 1, when the reduction gear 12 rotates on the intermediate rail rack 40, the reduction gear 12 will drive the intermediate rail assembly 4 to slide on the fixed rail assembly 1 through the intermediate rail rack 40. Since the transmission gear 14 and the linkage gear 13 rotate coaxially with the same rotational speed and the gear radius of the linkage gear 13 is smaller than that of the reduction gear 12, when the linkage gear 13 and the reduction gear 12 are meshed, the rotational speed of the reduction gear 12 is lower than that of the linkage gear 13. Therefore, the meshing and sliding speeds of the transmission gear 14 and the reduction gear 12 with the same gear radius and tooth groove with the corresponding movable rail rack 20 and intermediate rail rack 40 are different. When the movable rail rack 20 slides across the transmission gear 14 at a higher speed, the reduction gear 12 drives the intermediate rail rack 40 to slide in the same direction at a lower speed, thereby realizing the differential motion mode of the movable rail assembly 2 and the intermediate rail assembly 4. During the actual process of pulling and pushing the drawer, when pulling the drawer, first the movable rail assembly 2 will slide out first, and the intermediate rail assembly 4 slowly follows the movable rail assembly 2 to slide out. When the movable rail assembly 2 is fully pulled out, the intermediate rail assembly 4 slides to the limit position, and the drawer is pulled out to the maximum length. When pushing the drawer closed, similarly, when the movable rail assembly 2 is pushed to the end, the intermediate rail assembly 4 also closely follows the movable rail assembly 2 and is completely retracted into the drawer slot of the drawer cabinet, and there will be no situation where the intermediate rail assembly 4 leaks out.

[0024] The movable rail rack 20 is fixed at the top position of the outer side wall of the movable rail assembly 2. A rack mounting plate 41 is vertically fixed at the bottom of the outer side wall of the intermediate rail assembly 4. The intermediate rail rack 40 is fixed at the top of the rack mounting plate 41. A gear plate 11 is vertically fixed at the bottom of the outer side wall of the fixed rail assembly 1. The gear plate 11 is located at the bottom of the rack mounting plate 41 and is horizontally parallel to the rack mounting plate 41. An installation plate is bent upward from the outer side edge of the gear plate 11. The installation plate is vertically arranged outside the movable rail rack 20 and the intermediate rail rack 40. The reduction gear mechanism is installed on the inner side surface of the installation plate. The arranged rack mounting plate 41 and gear plate 11 mainly lead the gear reduction mechanism to be installed outside the fixed rail assembly 1, the movable rail assembly 2 and the intermediate rail assembly 4, which is convenient for later maintenance and reduces the occupied installation space of the reduction gear mechanism.

[0025] The working principle of the present invention is as follows: In actual use, the fixed rail assembly 1 is installed on the two side walls of the drawer slot of the cabinet body, and the movable rail assembly 2 is fixed on both sides of the bottom surface of the drawer. When the drawer is pulled outwards, the movable rail rack 20 drives the transmission gear 14 to rotate. The transmission gear 14 drives the linkage gear 13 to rotate, and the linkage gear 13 drives the reduction gear 12 to rotate. The reduction gear 12 meshes with the intermediate rail rack 40. Since the intermediate rail rack 40 is integrally fixedly installed on the intermediate rail assembly 4, and the intermediate rail assembly 4 is slidably clamped on the fixed rail assembly 1, when the reduction gear 12 rotates on the intermediate rail rack 40, the reduction gear 12 will drive the intermediate rail assembly 4 to slide on the fixed rail assembly 1 through the intermediate rail rack 40. Since the transmission gear 14 and the linkage gear 13 rotate coaxially and have the same rotational speed, and the gear radius of the linkage gear 13 is smaller than the gear radius of the reduction gear 12, when the linkage gear 13 and the reduction gear 12 are meshed and connected, the rotational speed of the reduction gear 12 is lower than the rotational speed of the linkage gear 13. Therefore, the meshing and sliding speeds of the transmission gear 14 and the reduction gear 12 with the corresponding movable rail rack 20 and intermediate rail rack 40 are different. When the movable rail rack 20 slides past the transmission gear 14 at a higher speed, the reduction gear 12 drives the intermediate rail rack 40 to slide in the same direction at a lower speed, thereby realizing the differential motion mode of the movable rail assembly 2 and the intermediate rail assembly 4. During the actual process of pulling and pushing the drawer, when pulling the drawer, first the movable rail assembly 2 will slide out first, and the intermediate rail assembly 4 slowly follows the movable rail assembly 2 to slide out. When the movable rail assembly 2 is fully pulled out, the intermediate rail assembly 4 slides to the limit position, and the drawer is pulled out to the maximum length. When pushing the drawer closed, similarly, when the movable rail assembly 2 is pushed to the end, the intermediate rail assembly 4 also closely follows the movable rail assembly 2 and is completely retracted into the drawer slot of the drawer cabinet, and there will be no situation where the intermediate rail assembly 4 leaks outside. Therefore, in the present invention, a transmission connection is provided between the movable rail assembly 2 and the intermediate rail assembly 4 through the movable rail rack 20, the intermediate rail rack 40, and the reduction gear mechanism. The movable rail assembly 2 and the intermediate rail assembly 4 can not only achieve the effect of synchronous operation, but also realize differential motion, the movement is more gentle and orderly, there will be no situation where the intermediate rail assembly 4 leaks outside, reduce the noise when the slide rail is opened or closed, and the entire opening or closing force is uniform, so as to have a better user experience.

[0026] Embodiment 2

[0027] The difference between this embodiment and Embodiment 1 is that:

[0028] A buffer assembly 6 is installed on one side of the movable rail assembly 2.

[0029] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Accordingly, all changes that fall within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims concerned.

[0030] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A reduction gear type guide mechanism for drawing a drawer, comprising a fixed rail assembly (1), a movable rail assembly (2) and an intermediate rail assembly (4), wherein the fixed rail assembly (1) is slidably connected to the intermediate rail assembly (4), and the intermediate rail assembly (4) is slidably connected to the movable rail assembly (2) for fixing the drawer; It is characterized in that A sliding assembly is provided in the interlayer between the fixed rail assembly (1) and the intermediate rail assembly (4), and in the interlayer between the intermediate rail assembly (4) and the movable rail assembly (2); a movable rail rack (20) is fixed on the movable rail assembly (2); an intermediate rail rack (40) opposite to the movable rail rack (20) is fixed on the intermediate rail assembly (4); the intermediate rail rack (40) and the movable rail rack (20) are arranged along the sliding direction of the movable rail assembly (2) and the intermediate rail assembly (4); the intermediate rail rack (40) and the movable rail rack (20) are connected to each other through a reduction mechanism, and the reduction mechanism is fixedly mounted on the fixed rail assembly (1) through a connecting plate assembly; The deceleration mechanism comprises a deceleration gear (12), a linkage gear (13) and a transmission gear (14); the transmission gear (14) and the linkage gear (13) are fixed together on a rotating shaft; the rotating shaft is rotationally fixed on a plate surface of a connecting plate assembly; the deceleration gear (12) is rotationally fixed on one side of the linkage gear (13) and the transmission gear (14) through the rotating shaft; the connecting plate assembly is fixedly connected to a fixed rail assembly (1); the transmission gear (14) is meshed and connected with a movable rail rack (20); the linkage gear (13) is meshed and connected with the deceleration gear (12); the deceleration gear (12) is meshed and connected with an intermediate rail rack (40); the transmission gear (14) and the deceleration gear (12) have the same gear radius and tooth groove; the gear radius of the linkage gear (13) is smaller than the gear radius of the deceleration gear (12); The movable rail rack (20) is fixed at the top position of the outer wall of the movable rail assembly (2); a rack mounting plate (41) is vertically fixed to the bottom of the outer wall of the intermediate rail assembly (4); the intermediate rail rack (40) is fixed to the top of the rack mounting plate (41); a gear plate (11) is vertically fixed to the bottom of the outer wall of the fixed rail assembly (1); the gear plate (11) is located at the bottom of the rack mounting plate (41) and is horizontally parallel to the rack mounting plate (41); a mounting plate is bent upward on the outer side of the gear plate (11); the mounting plate is vertically arranged on the outer sides of the movable rail rack (20) and the intermediate rail rack (40); and the speed reduction mechanism is installed on the inner plate surface of the mounting plate; A buffer assembly (6) is installed on one side of the movable rail assembly (2).

2. The decelerating gear type guiding mechanism for drawer pulling according to claim 1, wherein The sliding assembly includes an upper bead nest assembly (3) that is slidably clamped between the movable rail assembly (2) and the intermediate rail assembly (4), and a lower bead nest assembly (5) that is slidably clamped between the fixed rail assembly (1) and the intermediate rail assembly (4). Through holes are respectively formed in the upper and lower directions on the surfaces of the upper bead nest assembly (3) and the lower bead nest assembly (5). Ball grooves (30) are formed, and balls (31) that are rotationally fixed in the ball grooves (30) and are respectively in rolling contact with the inner walls of the interlayers between the movable rail assembly (2) and the intermediate rail assembly (4), and between the fixed rail assembly (1) and the intermediate rail assembly (4) are provided.

3. The decelerating gear type guiding mechanism for drawer pulling according to claim 2, characterized in that A sliding clamping plate (10) is vertically fixed to the outer side edge of the fixed rail assembly (1). The cross-section of the sliding clamping plate (10) is an inverted L shape that bends inward. The lower bead nest assembly (5) is a square shape with an opening at the bottom. The lower bead nest assembly (5) wraps around the top surface and the side of the sliding clamping plate (10), and the entire intermediate rail assembly (4) is slidably sleeved above the sliding clamping plate (10) through the lower bead nest assembly (5).

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