WO2018214272A1

WO2018214272A1 - Electric-powered slide rail transmission mechanism and seat

Info

Publication number: WO2018214272A1
Application number: PCT/CN2017/094337
Authority: WO
Inventors: 施特默尔·于尔根; 王奇; 常建; 唐臻毅
Original assignee: 延锋安道拓座椅机械部件有限公司; 安道拓工程&知识产权有限公司
Priority date: 2017-05-22
Filing date: 2017-07-25
Publication date: 2018-11-29
Also published as: CN206900204U

Abstract

Disclosed are an electric-powered slide rail transmission mechanism and a seat. The electric-powered slide rail transmission mechanism comprises a drive assembly (1) and two mutually parallel slide rail assemblies (2), wherein the slide rail assemblies respectively comprise an upper rail (21), a lower rail (22), a screw rod (23), a gearbox (24) and a gearbox bracket (25); the upper rail and the lower rail mutually slide and fit together and cooperate to form a holding chamber; the screw rod is located in the holding chamber, two ends of the screw rod are respectively fixed to the lower rail via a first screw rod bracket (26) and a second screw rod bracket (27); the gearbox is fixed to the upper rail via the gearbox bracket, the drive assembly is in a drive connection with the screw rod via the gearbox, a gearbox bracket mounting hole (211) is formed on a first top face of the upper rail, the top of the gearbox bracket extends out from the gearbox bracket mounting hole, and the gearbox bracket is welded and fixed to the gearbox bracket mounting hole. The electric-powered slide rail transmission mechanism and the seat have the advantages of light weight, a simple structure, a high qualifying product rate, low cost, a large space for slide rail layout, high flexibility, high locking strength, small gaps between components and low noise.

Description

Electric rail drive mechanism and seat

Technical field

The utility model relates to the field of seats, in particular to an electric slide transmission mechanism and a seat.

Background technique

The development of the automotive industry has made people have higher requirements for the comfort, operability and safety of car seats. At present, the seats on the market are divided into manual control seats and electric control seats. The electric seats have the advantages of simple operation, quick response and reliability, and become the first choice for medium and high-end models.

The seat is fixed to the slide rail by screws or rivets. The performance of the slide rail will directly affect the strength and vibration of the whole seat. The strength includes key technical indicators such as lock strength and peel strength. It plays a vital role in protecting the safety of drivers and passengers.

At present, the horizontal transmission of the seat mostly uses a saddle-shaped bracket to fix the gear box, and then the saddle-shaped bracket is fixed to the upper rail by screw connection. This type of connection has many disadvantages:

First of all, the use of screw joints is costly, large in size, and complex in structure. This type of coupling requires that each transmission component be first assembled into a sub-assembly and then fixed to the sliding rail, which not only requires the rail to have a large in-track space, increases the height of the rail, but also requires the gearbox to float up and down in the gearbox bracket. , resulting in increased height of the gearbox bracket, increasing product weight and cost. In addition, the cost of the screw is generally high, and the screwing is required to perform the drilling and tapping on the fitting, the cost of the drilling and tapping is high, and the process stability and precision cannot be guaranteed.

Secondly, all gearbox brackets on the market currently use a bottom closed structure, resulting in a small space in the lower part of the gearbox bracket, which is not conducive to the placement of rivets or screws on the lower rail, so that the lower rail can only be welded or even tightened with rivets and screws. The height of the head is also limited and the strength cannot be guaranteed.

Third, the current gearbox brackets are mostly screwed to the upper rail, and the lower end of the bracket is completely free. When the vehicle is in emergency braking, the rails will be subjected to large axial forces, and the axial force will cause serious deformation of the gearbox brackets. Collapse, causing security risks.

Fourth, the upper part of the current mainstream gearbox is open, and the seat belt is quickly tightened when the vehicle is suddenly braked. And exert a large peeling force on the upper rail, the upper rail opening will cause the upper rail to have no support when peeling off, reducing the peel strength.

Summary of the invention

In view of the above deficiencies in the prior art, the utility model provides an electric slide transmission mechanism and a seat, which has the advantages of light weight, simple structure, high production qualification rate, low cost, large layout space of the slide rail, high flexibility, and lock. High strength, small gap between components and low noise.

In order to achieve the above object, the utility model provides an electric slide rail transmission mechanism, which comprises a driving assembly and two parallel rail assemblies which are parallel to each other. The slide rail assembly respectively comprises an upper rail, a lower rail, a screw rod and a gear box. And a gear box bracket, the upper rail and the lower rail slide and cooperate with each other to form a cavity, the screw rod is located in the cavity, and the two ends of the screw rod respectively pass through a first screw a bracket and a second screw bracket fixed to the lower rail; the gear box is fixed to the upper rail by the gear box bracket, and the driving assembly is drivingly connected to the screw rod through the gear box a first top surface of the upper rail forms a gear box bracket mounting opening, a top of the gear box bracket protrudes from the gear box bracket mounting opening, and the gear box bracket is welded to the gear box bracket mounting opening fixed.

Preferably, the gearbox bracket includes a second top surface and two sides, and the gearbox bracket is open at the bottom.

Preferably, the gear box bracket has a U shape, and the two side surfaces respectively form a corresponding screw hole, and the screw rod is inserted into the screw hole.

Preferably, the screw hole is elliptical.

Preferably, the bottom of the side of the gearbox bracket forms a buckle in a direction close to the two sides of the upper rail, and two sides of the upper rail respectively form two latching slots that cooperate with the buckle. The buckle is inserted into the buckle groove.

Preferably, the two latching slots on the same side of the upper rail respectively comprise an inner side surface and an outer side surface, wherein the inner side surface is a side surface of the two sides of the upper rail on which the two latching slots are adjacent to each other. The outer side surface is a side surface of the two sides of the upper rail on which the two latching grooves are apart from each other, and the buckle has an interference fit with the outer side surface, and the buckle has a clearance fit with the inner side surface.

Preferably, the second top surface forms a positioning hole.

Preferably, the first screw bracket includes a bottom surface, and the first screw bracket is fixed to the lower rail through the bottom surface, and the bottom surface is bent away from an end of the gear box to form a limiting end. The screw rod is fixed to the limit end.

Preferably, the gearbox is fixed to the gearbox bracket by a rubber pad, and the rubber pad is interposed between the gearbox and the gearbox bracket.

A seat of the present invention includes a seat body, and further includes an electric slide transmission mechanism according to the present invention, and the electric slide transmission mechanism is fixed to the seat body.

The utility model adopts the above technical solutions, so that it has the following beneficial effects:

The gear box bracket is welded and fixed to the gear box bracket mounting port, which eliminates the existing screw connection structure, thereby reducing the weight and complexity of the system, thereby improving the production yield and reducing the production cost; The manner in which the gearbox and the gearbox bracket are loaded into the slide rails does not require the assembly space to be reserved, so that the height of the upper rail can be reduced and the size of the gearbox bracket can be reduced. The gearbox bracket includes a second top surface for closing the gearbox bracket mounting opening to ensure normal transmission of the upper rail load, which greatly improves the peel strength of the upper rail. At the same time, the bottom of the gearbox bracket can greatly increase the installation space between the bottom and the lower rail of the gearbox bracket, so that the lower rail can be freely arranged with rivets or screws, which facilitates the connection of the lower rail to the vehicle body and increases the layout in the cavity. Space and flexibility. The buckle has an interference fit with the outer side, and the buckle cooperates with the inner side clearance to improve the locking strength and peeling strength of the system, reduce the product gap, eliminate the noise source of the potential small gap, improve the mute performance of the product, and prevent the gear box bracket The bottom deformation caused by the failure caused by the load, greatly improving the locking strength. Since the bottom of the gearbox bracket is open, the installation space between the gearbox bracket and the lower rail is increased, so that the end of the bottom surface away from the gearbox is bent upward to form a limit end, compared to the existing first screw bracket. The limit end is rotated by 180 degrees, which increases the sliding stroke between the upper rail and the lower rail, and improves the cost performance of the slide rail assembly. At the same time, when the limit end is subjected to the front collision, the first screw bracket is pulled. The screw rod is not easy to be unstable, so that the front impact strength of the product can be improved. The rubber cushion is interposed between the gear box and the gearbox bracket, which can isolate the vibration, so that the vibration generated during the operation of the gearbox will not be transmitted to the upper rail, the lower rail, the skeleton and the seat, and the electric seat is lowered. The noise when the chair is running. In addition, the rubber mat is a flexible connection, which ensures that the gear box can float up and down in the gear box bracket, which compensates for assembly errors and eliminates assembly stress, ensures that the gear box is in a free state during operation, and improves product life and performance. In addition, the rubber mat adopts an interference fit, which has a certain pre-deformation during assembly and can be reduced. The gap between the upper rail and the lower rail.

DRAWINGS

1 is a schematic view showing the overall structure of an electric slide rail transmission mechanism according to an embodiment of the present invention;

2 is a schematic view showing the connection structure of the upper rail, the lower rail and the gear box bracket according to an embodiment of the present invention;

Figure 3 is an exploded view of the slide rail assembly of the embodiment of the present invention;

4 is a schematic structural view of a gear box bracket according to an embodiment of the present invention;

Figure 5 is a partial structural view of the upper rail of the embodiment of the present invention;

6 is a schematic structural view showing a connection structure between a gear box buckle and an upper rail side bayonet groove according to an embodiment of the present invention;

Figure 7 is a cross-sectional view of the slide rail assembly of the embodiment of the present invention;

FIG. 8 is a schematic view showing the connection structure of the first screw bracket and the lower rail according to an embodiment of the present invention.

detailed description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 through 8, so that the functions and features of the present invention can be better understood.

Referring to FIG. 1 to FIG. 3 , an electric slide rail transmission mechanism according to an embodiment of the present invention includes a driving assembly 1 and two parallel rail assemblies 2 . The slide rail assembly 2 includes an upper rail 21 and a lower rail respectively. 22, a screw rod 23, a gear box 24 and a gear box bracket 25, the upper rail 21 and the lower rail 22 slide and cooperate with each other to form a cavity, the screw rod 23 is located in the cavity, and the two ends of the screw rod 23 respectively pass A first screw bracket 26 and a second screw bracket 27 are fixed to the lower rail 22; the gearbox 24 is fixed to the upper rail 21 via a gearbox bracket 25, and the drive assembly 1 is drivingly connected to the screw shaft 23 through the gear box 24, A first top surface of the rail 21 forms a gearbox bracket mounting opening 211. The top of the gearbox bracket 25 extends from the gearbox bracket mounting opening 211, and the gearbox bracket 25 is soldered to the gearbox bracket mounting opening 211.

The gearbox bracket 25 is welded and fixed to the gearbox bracket mounting opening 211, thereby eliminating the existing screw connection structure, thereby reducing the weight and complexity of the system, thereby improving the production yield and reducing the production cost; The manner of loading the gear box 24 and the gear case bracket 25 into the slide rail is realized, and it is not necessary to reserve the assembly space, so that the height of the upper rail 21 can be reduced, and the gear box bracket 25 The size is also reduced.

Referring to FIG. 3 and FIG. 4, in the embodiment, the gearbox bracket 25 is U-shaped and has a bottom opening. The gearbox bracket 25 includes a second top surface 251 and two side surfaces 252, and the two side surfaces 252 respectively form a corresponding screw rod. The hole 2521 and the lead screw 23 are bored in the screw hole 2521. The screw hole 2521 has an elliptical shape.

The gearbox bracket 25 includes a second top surface 251 for closing the gearbox bracket mounting opening 211 to ensure normal transmission of the upper rail 21 load, greatly improving the peel strength of the upper rail 21. At the same time, the bottom of the gearbox bracket 25 is open, which can greatly increase the installation space between the bottom of the gearbox bracket 25 and the lower rail 22, so that the lower rail 22 can be freely arranged with rivets or screws, which facilitates the connection of the lower rail 22 to the vehicle body, and increases Layout space and flexibility within the cavity.

Referring to FIG. 4 to FIG. 7 , a bottom portion of the side surface 252 of the gear case bracket 25 is formed with a buckle 2522 in a direction close to both sides of the upper rail 21 , and two sides of the upper rail 21 respectively form two cards that cooperate with the buckle 2522 . The buckle groove 212 and the buckle 2522 are inserted into the buckle groove 212.

The two latching slots 212 on the same side of the upper rail 21 respectively include an inner side surface 2122 and an outer side surface 2121. The inner side surface 2122 is a side adjacent to the two latching slots 212 on the same side of the upper rail 21, and the outer side surface 2121. The side of the two sides of the same side of the two latching slots 212 away from each other, the buckle 2522 and the outer side surface 2121 interference fit, the buckle 2522 and the inner side 2122 clearance fit. The second top surface 251 forms a positioning hole 2511.

The buckle 2522 has an interference fit with the outer side surface 2121, and the buckle 2522 is matched with the inner side surface 2122 to improve the locking strength and peeling strength of the system, reduce the product gap, eliminate the noise source of the potential small gap, and improve the mute performance of the product; The bottom case deformation of the gear case bracket 25 is prevented from being broken, and the locking strength is greatly improved.

Referring to FIG. 8, the first screw bracket 26 includes a bottom surface 261. The first screw bracket 26 is fixed to the lower rail 22 by a rivet disposed between the bottom surface 261 and the lower rail 22. The bottom surface 261 is away from the end of the gear box 24. The bent end forms a limiting end 262, and the lead screw 23 is fixed to the limiting end 262. In the present embodiment, the gear box 24 is fixed to the gear case bracket 25 by a rubber pad 241, and the rubber pad 241 is interposed between the gear box 24 and the gear box bracket 25.

Since the bottom of the gearbox bracket 25 is open, the installation space between the gearbox bracket 25 and the lower rail 22 is increased, so that the end of the bottom surface 261 away from the gearbox 24 can be bent upward to form the limiting end 262, compared with the present. There is a first screw bracket 26, and the limiting end 262 is rotated by 180 degrees to increase the upper rail 21 and the lower rail. The sliding stroke between the rails 22 improves the cost performance of the rail assembly 2, and at the same time, when the limiting end 262 is subjected to the front collision, the first screw bracket 26 is pulled, and the screw rod 23 is not easily unstable, thereby improving the product. The strength of the front impact.

The rubber cushion 241 is interposed between the gear box 24 and the gear box bracket 25, and can function to isolate vibrations, so that vibration generated when the gear box 24 is in operation does not transmit to the upper rail 21, the lower rail 22, the skeleton and the seat. Above the chair, reduce the noise when the power seat is running. In addition, the rubber pad 241 is a flexible connection, which ensures that the gear box 24 can float up and down in the gear box bracket 25, thereby compensating for assembly errors and eliminating assembly stress, ensuring that the gear box 24 is in a free state during operation, improving product life and Performance. In addition, the rubber pad 241 is provided with an interference fit, and has a certain pre-deformation during assembly, and the gap between the upper rail 21 and the lower rail 22 can be reduced.

A seat of the present invention includes a seat body, and further includes an electric slide transmission mechanism of the present invention, and the electric slide rail transmission mechanism is fixed to the seat body.

The present invention has been described in detail above with reference to the embodiments of the drawings, and various modifications of the present invention can be made by those skilled in the art in light of the above description. Therefore, some of the details in the embodiments are not to be construed as limiting the scope of the invention, and the scope of the invention as defined by the appended claims.

Claims

An electric slide transmission mechanism comprising a drive assembly and two parallel rail assemblies, the slide rail assembly respectively comprising an upper rail, a lower rail, a screw rod, a gear box and a gear box bracket, wherein the upper rail assembly The rail and the lower rail slide and cooperate with each other to form a cavity, the screw rod is located in the cavity, and the two ends of the screw rod are respectively fixed by a first screw bracket and a second screw bracket The lower rail; the gearbox is fixed to the upper rail by the gearbox bracket, and the driving component is drivingly connected to the screw through the gearbox, wherein one of the upper rails The first top surface forms a gear box bracket mounting opening, the top of the gear box bracket protrudes from the gear box bracket mounting opening, and the gear box bracket is welded and fixed to the gear box bracket mounting opening.
The electric rail drive mechanism of claim 1 wherein said gearbox bracket includes a second top surface and two sides, and said gearbox bracket bottom opening.
The electric rail transmission mechanism according to claim 2, wherein the gear case bracket has a U shape, and the two side surfaces respectively form a screw hole corresponding to each other, and the screw rod is disposed on the screw rod Inside the hole.
The electric slide transmission mechanism according to claim 3, wherein the screw hole has an elliptical shape.
The electric slide rail transmission mechanism according to claim 3, wherein a bottom of a side surface of the gear case bracket forms a buckle toward a side of the upper rail, and both sides of the upper rail Two snap grooves are formed respectively for engaging with the buckles, and the buckles are inserted into the buckle grooves.
The electric slide rail transmission mechanism according to claim 4, wherein the two latching grooves on the same side of the upper rail respectively comprise an inner side surface and an outer side surface, wherein the inner side surface is the same as the upper rail a side of the two sides of the side of the buckle groove adjacent to each other, wherein the outer side surface is a side of the same side of the upper rail from which the two latching grooves are away from each other, and the buckle has an interference fit with the outer side surface. The buckle cooperates with the inner side clearance.
The electric slide transmission mechanism according to any one of claims 3 to 6, wherein the second top surface forms a positioning hole.
The electric slide rail transmission mechanism according to claim 7, wherein the first screw bracket comprises a bottom surface, and the first screw bracket is fixed to the lower rail through the bottom surface, the bottom surface being far One end of the gear box is bent upward to form a limiting end, and the lead screw is fixed to the limiting end.
The electric slide transmission mechanism according to claim 8, wherein the gear case is fixed to the gear case bracket by a rubber pad, and the rubber pad is interposed between the gear box and the gear box Between the brackets.
A seat comprising a seat body, characterized by further comprising the electric slide transmission mechanism according to any one of claims 1 to 9, wherein the electric slide transmission mechanism is fixed to the seat body.