Electric sliding rail and seat

Abstract

The invention discloses an electric sliding rail and a seat, the electric sliding rail comprises a first rail and a second rail which make the seat slide linearly through relative displacement of a driving device, a locking mechanism support and a nut are of an integrated structure, and a through mixed threaded hole is formed between the locking mechanism support and the nut. The mixed threaded hole is made of two different materials including metal. On one hand, a screw hole structure made of mixed materials is arranged on the locking mechanism, the strength of screw holes is guaranteed, excessive gaps caused by abrasion between threads are prevented, on the other hand, an input gear in the gearbox is made of metal materials, and an output gear is made of plastic materials, so that the mute performance is further improved.

Description

Technical Field

[0001] The invention relates to the field of seat slide rails, and in particular to an electric slide rail and a seat. Background Art

[0002] In the existing slide rail screw transmission structure, the locking mechanism uses a nut made of engineering plastic material to mesh with the screw. Although this meshing method is beneficial to reducing transmission noise, due to the low strength of the plastic material, long-term meshing transmission with the metal screw will cause wear, resulting in a larger thread gap at the meshing point, and a noticeable sense of jumping when used. Summary of the invention

[0003] In order to overcome the above-mentioned defects of the prior art, the purpose of the present invention is to provide an electric slide rail and a seat to achieve the purpose of improving the shaking caused by excessive gap between the screw rod and the locking mechanism under durable working conditions.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] An electric slide rail comprises a first rail and a second rail which are relatively displaced by a driving device to make a seat slide linearly. The locking mechanism bracket and the nut are an integral structure, and a through mixed threaded hole is provided between the locking mechanism bracket and the nut.

[0006] In a preferred embodiment of the present invention, the mixed threaded hole is made of two different materials including metal.

[0007] In a preferred embodiment of the present invention, the mixed threaded hole includes a metal bracket screw hole provided on the locking mechanism bracket and a plastic nut screw hole provided on the nut.

[0008] In a preferred embodiment of the present invention, bosses facing each other are provided on the side walls of the locking mechanism bracket, and countersunk platforms correspondingly engaged with the bosses are provided at the ends of the nut, the plastic nut screw holes are placed between the countersunk platforms, and the metal bracket screw holes pass through the bosses and engage with the plastic nut screw holes.

[0009] In a preferred embodiment of the present invention, the locking mechanism bracket is connected to the second track via a mounting foot, and a buffer is provided on the periphery of the mounting foot.

[0010] In a preferred embodiment of the present invention, the transmission mechanism and the screw rod are transmitted via a first gear and a second gear, the first gear is made of metal, and the second gear is made of plastic or a plastic-metal mixed material.

[0011] In a preferred embodiment of the present invention, the second gear is fixed to the end of the screw rod through a metal base shaft, the outer teeth of the second gear are arranged on the outer periphery of the metal base shaft to form an integrated structure, and the outer teeth of the second gear are made of plastic.

[0012] In a preferred embodiment of the present invention, a base shaft gear ring is provided on the outer surface of the metal base shaft, and the second gear outer teeth are disposed on the base shaft gear ring.

[0013] In a preferred embodiment of the present invention, the second gear package is arranged at the end of the screw rod and forms an integrated structure.

[0014] A seat, comprising the above-mentioned electric slide rail.

[0015] The beneficial effects of the present invention are:

[0016] The electric slide rail and seat provided by the present invention, on the first hand, arrange a screw hole structure of mixed materials on the locking mechanism to ensure the strength of the screw hole to prevent excessive gaps caused by wear between threads; on the second hand, change the input gear in the gear box to metal material and change the output gear to plastic material to further improve the quietness performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0018] Figure 1 It is a schematic diagram of the prior art.

[0019] Figure 2 It is a structural schematic diagram of the locking mechanism of the present invention.

[0020] Figure 3 yes Figure 2 Front cross-sectional view of .

[0021] Figure 4 yes Figure 3 The split diagram.

[0022] Figure 5 It is a schematic diagram of another implementation of the locking mechanism.

[0023] Figure 6 yes Figure 5 Front cross-sectional view of .

[0024] Figure 7 Schematic diagram of a first embodiment of the gearbox of the present invention.

[0025] Figure 8 Schematic diagram of a second embodiment of the gearbox of the present invention. DETAILED DESCRIPTION

[0026] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. The above description is simplified for the convenience of describing the present invention, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation on the present invention.

[0027] The singular forms "a", "said" and "the" used in the specification include plural forms unless clearly indicated. The terms "include", "comprises" and "comprising" used in the specification indicate the presence of the claimed features, but do not exclude the presence of one or more other features.

[0028] In the specification, when an element is referred to as being “on,” “fixed” to, “connected to,” “engaged to,” or the like, the element may be directly on, fixed to, connected to, engaged to, or contacting the other element, or intervening elements may be present.

[0029] It is to be understood that although the terms "first", "second", etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. Therefore, a first element may be referred to as a second element without departing from the teachings of the present application.

[0030] The following will describe exemplary embodiments of the present application with reference to the accompanying drawings. However, it should be understood that the present application can be presented in a variety of different ways and is not limited to the embodiments described below. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments. In all drawings, the same reference numerals represent the same or functionally identical elements.

[0031] refer to Figure 1 The main structure of the displayed front electric slide rail assembly is that the assembly drives the first rail 5 and the second rail 1 to slide relative to each other in the axial direction through a set of driving devices. The driving device is a screw drive structure, that is, the displacement is achieved through the screw rod 2 and the locking mechanism 4 screwed on the screw rod 2. It also includes a transmission mechanism 3 that drives the screw rod 2 to rotate and a gear box 3 arranged between the screw rod 2 and the transmission mechanism 3, which has a primary transmission structure composed of a first gear 32 and a second gear 33.

[0032] Figures 2 to 4The locking mechanism in this front electric slide rail assembly is shown. The second locking mechanism bracket 51 of the locking mechanism 4a is in a "ji" character shape. The two sides are mounting feet 52 for connecting with the second track 1, and the middle part is the mounting position 53 for the second nut 57. The side wall 54 extends upward from the mounting foot 52 and forms a concave groove 53a at the mounting position 53. The second nut 57 is placed in the groove 53a and forms an integral structure with the second locking mechanism bracket 51. The threaded structure of the locking mechanism 4a is composed of bracket screw holes 56 on the side walls 54 on both sides of the mounting position 53 and nut screw holes 59 in the second nut 57 that are joined and interconnected with the bracket screw holes 56. The second nut 57 is made of plastic, and the second locking mechanism bracket 51 is made of metal. Therefore, the threaded structure made of a hybrid material can solve the problem of insufficient strength in the original pure plastic material. The second nut 57 is formed on the second locking mechanism bracket 51 through a plastic coating process to form an integral structure. In order to improve the engagement matching degree of the bracket screw holes 56 and the nut screw holes 59, convex platforms 55 that protrude towards each other are arranged on the inner side of the side wall 54, and corresponding counterbores 58 are provided on the second nut 57. The bracket screw holes 56 pass through the convex platforms 55 and are connected to the nut screw holes 59 that are also connected between the counterbores 58. Further, a buffer member 52a is also provided around the outer periphery of the mounting foot 52 to reduce the vibration of the locking mechanism 4a during operation.

[0033] Figure 5 and Figure 6 Another implementation of the locking mechanism is shown. A gap 57a is left between the nut screw hole 59 and the bracket screw hole 56. The lead screw 2 enters from the bracket screw hole 56, passes through the gap 57a, meshes with the nut screw hole 59, and then passes out through the gap 57a on the other side. The mounting foot 52 is designed to be folded inward and then wrapped by the buffer member 52a, which can further integrate and miniaturize the volume of the locking mechanism 4a.

[0034] Figure 7 and Figure 8 The gearbox structure in the front electric slide rail assembly is shown, including a first gear 32 and a second gear 33 that meshes with it for transmission. Since the rotational speed of the first gear 32 is greater than that of the second gear 33, a metal material is selected to make it to improve the dimensional accuracy and ensure the transmission stability. The second gear 33 is correspondingly selected to be made of plastic to ensure low noise during the operation of the gearbox 3. Since the materials of the second gear 33 and the lead screw 2 are different, they cannot be connected together through a simple assembly process.

[0035] Figure 7 The first preferred implementation is specifically shown. The second gear 33 is integrally plastic-coated at the end of the lead screw 2. This connection method effectively avoids the problem of large fluctuations in part size deviation caused by material deformation in the original metal riveting structure.

[0036] Figure 8 The second preferred embodiment is specifically demonstrated, in which a base shaft gear ring 34a is arranged on the outer periphery of the metal base shaft 34, and the second gear outer teeth 33a are directly molded on the base shaft 34 through an injection molding process to form an integrated structure. The tooth structure of the base shaft gear ring 34a can increase the connection area between the second gear outer teeth 33a and the base shaft 34 to improve the strength, and finally the base shaft 34 is pressed onto the end of the screw rod 2.

Claims

1. An electric slide rail, comprising a first rail and a second rail which are relatively displaced by a driving device to enable a seat to slide linearly, characterized in that: The locking mechanism bracket and the nut are an integrated structure, and a through mixed threaded hole is provided between the locking mechanism bracket and the nut.

2. An electric slide rail as claimed in claim 1, characterized in that: The material of the mixed threaded hole is composed of two different materials including metal.

3. The electric slide rail according to claim 1, characterized in that: The mixed threaded hole includes a metal bracket screw hole opened on the locking mechanism bracket and a plastic nut screw hole opened on the nut.

4. An electric slide rail as claimed in claim 3, characterized in that: Bosses facing each other are arranged on the side walls of the locking mechanism bracket, and a countersunk platform correspondingly engaged with the bosses is arranged at the end of the nut, the plastic nut screw hole is placed between the countersunk platforms, and the metal bracket screw hole passes through the boss and engages with the plastic nut screw hole.

5. The electric slide rail according to claim 3, characterized in that: The locking mechanism bracket is connected to the second track through a mounting foot, and a buffer is provided on the outer periphery of the mounting foot.

6. An electric slide rail according to any one of claims 1 to 5, characterized in that: The transmission mechanism and the screw rod are transmitted via a first gear and a second gear, the first gear is made of metal, and the second gear is made of plastic or a mixed material of plastic and metal.

7. An electric slide rail as claimed in claim 6, characterized in that: The second gear is fixed to the end of the screw rod through a metal base shaft, the outer teeth of the second gear are arranged on the outer periphery of the metal base shaft to form an integrated structure, and the outer teeth of the second gear are made of plastic.

8. An electric slide rail as claimed in claim 7, characterized in that: A base shaft gear ring is arranged on the outer surface of the metal base shaft, and the second gear outer teeth are wrapped around the base shaft gear ring.

9. The electric slide rail according to claim 6, characterized in that: The second gear is packaged at the end of the screw rod to form an integrated structure.

10. A seat, characterized in that: An electric slide rail comprising any one of claims 1 to 9.

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