CN113119814B

CN113119814B - Escape mechanism for electric slide rail of vehicle seat

Info

Publication number: CN113119814B
Application number: CN202110580090.6A
Authority: CN
Inventors: 刘文博; 伊鹏辉; 倪洪斌; 吴培桂; 唐臻毅
Original assignee: Keiper Changshu Seating Mechanisms Co Ltd
Current assignee: Keiper Changshu Seating Mechanisms Co Ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2022-09-23
Anticipated expiration: 2041-05-26
Also published as: CN113119814A

Abstract

The invention relates to an escape mechanism for an electric sliding rail of a vehicle seat, which comprises two stop blocks, a nut, a screw rod and a first pin, wherein the two stop blocks are fixed at intervals in a first direction, the nut is installed between the two stop blocks, the screw rod penetrates through the two stop blocks and the nut along the first direction and is in threaded fit with the nut, and the first pin extends along a second direction perpendicular to the first direction and has one tail end extending into the nut to be matched. According to the escape mechanism for the electric slide rail of the vehicle seat, when the seat function cannot drive the screw nut to move for forward and backward adjustment after power failure, the first pin is manually unlocked to be disengaged from the nut, so that the forward and backward adjustment function of the seat can be realized, and the escape function is further realized.

Description

Escape mechanism for electric slide rail of vehicle seat

Technical Field

The invention relates to an electric slide rail, in particular to an escape mechanism for an electric slide rail of a vehicle seat.

Background

At present, most of electric slide rail transmission structures are lead screw nut self-locking structures; under the condition of power failure, due to the self-locking property of the screw rod, the sliding rail cannot be adjusted in the front-back direction, so that the escape function of the sliding rail cannot be realized. The zero-gravity state means that the seat is basically in a lying position, the angle of the seat cushion and the position of the leg cushion are both in the most comfortable position when a human body lies, and no electric slide rail escape mechanism can meet the basic strength requirement of the zero-gravity state while the escape function is realized.

Disclosure of Invention

In order to solve the problem that the sliding rail in the prior art cannot be adjusted forwards and backwards due to self-locking of the screw rod, the invention provides an escape mechanism for an electric sliding rail of a vehicle seat.

The escape mechanism for the electric slide rail of the vehicle seat according to the present invention comprises two stoppers fixed to each other with a space therebetween in a first direction, a nut installed between the two stoppers, a lead screw disposed through the two stoppers and the nut along the first direction and screw-engaged with the nut, and a first pin extending in a second direction perpendicular to the first direction and having one end protruding into the nut for engagement.

Preferably, the escape mechanism further comprises a first blocking piece and a second blocking piece which are fixed at a distance from each other in the second direction, and the end of the first pin which penetrates out of the second blocking piece extends into the nut to be matched.

Preferably, the escape mechanism further comprises a first spring, wherein the first spring is sleeved on the first pin between the first blocking piece and the second blocking piece to provide restoring force for the first pin.

Preferably, the escape mechanism further comprises a second pin, and the end of the second pin, which penetrates out of the second blocking piece, extends into the nut to be matched with the nut.

Preferably, the escape mechanism further comprises a second spring, and the second spring is sleeved on the second pin between the first blocking piece and the second blocking piece to provide restoring force for the second pin.

Preferably, the first pin and the second pin are respectively connected with a manual cable.

Preferably, the second pin is in communicative connection with the seat back (e.g., via a zero gravity state signal from the seat back).

Preferably, the escape mechanism further comprises a fastener (e.g., a rivet) respectively passing through the first blocking piece, the second blocking piece and the two blocking pieces to relatively fix the first blocking piece, the second blocking piece and the two blocking pieces.

Preferably, the escape mechanism is mounted on the power slide of the vehicle seat by a fastener.

Preferably, the electric slide rail of the vehicle seat comprises an upper slide rail and a lower slide rail, the first blocking piece is located below the lower slide rail, the second blocking piece, the two blocking blocks, the nut and the screw rod are located between the upper slide rail and the lower slide rail, and the fastener respectively penetrates through the first blocking piece, the lower slide rail, the second blocking piece and the two blocking blocks to be arranged so as to relatively fix the escape mechanism on the lower slide rail.

According to the escape mechanism for the electric slide rail of the vehicle seat, when the seat function cannot drive the screw nut to move for forward and backward adjustment after power failure, the first pin is manually unlocked to be disengaged from the nut, so that the forward and backward adjustment function of the seat can be realized, and the escape function is further realized. In particular, the escape mechanism includes two pins, unlocking one of the pins while retaining the locking of the other pin, which can ensure the basic strength requirement in a zero gravity state.

Drawings

Fig. 1 is a partial perspective view of an escape mechanism for a power glide for a vehicle seat according to a preferred embodiment of the present invention;

fig. 2 is an exploded view of an escape mechanism for a power glide track of a vehicle seat according to a preferred embodiment of the present invention;

fig. 3 illustrates an installation environment of an escape mechanism for a power glide track of a vehicle seat according to a preferred embodiment of the present invention;

fig. 4 illustrates a conventional state of an escape mechanism for a power glide track of a vehicle seat according to a preferred embodiment of the present invention;

fig. 5 shows an escape function state of an escape mechanism for a power slide for a vehicle seat according to a preferred embodiment of the present invention;

fig. 6 illustrates zero-gravity adjustment of a backrest of a seat equipped with an escape mechanism for a power slide rail of a vehicle seat according to a preferred embodiment of the present invention;

fig. 7 shows a zero-gravity functional state of the escape mechanism for a power slide for a vehicle seat according to a preferred embodiment of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, an escape mechanism 1 for a power slide of a vehicle seat according to a preferred embodiment of the present invention includes a first catch 11, a second catch 12, two rivets 13, two stoppers 14, a nut 15, and a screw 16, wherein the first catch 11 is also referred to as a lower spring catch, the second catch 12 is also referred to as an upper spring catch, the first catch 11 and the second catch 12 are spaced apart from each other in an up-down direction, the two rivets 13 are respectively disposed through the first catch 11, the second catch 12, and the two stoppers 14 from bottom to top so as to relatively fix the two stoppers 14 in a left-right spaced apart manner, the nut 15 is installed between the two stoppers 14 above the second catch 12, and the screw 16 is transversely disposed through the two stoppers 14 and the nut and is threadedly engaged with the nut 15.

As shown in fig. 2, the escape mechanism 1 for a power slide rail of a vehicle seat according to a preferred embodiment of the present invention further includes a first Pin 17 and a first spring 171, wherein the first Pin 17 is also referred to as a base strength Pin, the first spring 171 is also referred to as a base strength Pin spring, both ends of the first Pin 17 respectively protrude through the first and

second flaps

11 and 12, a distal end of the first Pin 17 protruding from the second flap 12 is fitted into a nut 15 (see fig. 4) thereon, and the first spring 171 is fitted over the first Pin 17 between the first and

second flaps

11 and 12 to provide a restoring force to the first Pin 17.

As shown in fig. 2, escape mechanism 1 for a power slide of a vehicle seat according to a preferred embodiment of the present invention further includes a second Pin 18 and a second spring 181, wherein second Pin 18 is also referred to as a high-strength Pin, second spring 181 is also referred to as a high-strength Pin spring, both ends of second Pin 18 respectively protrude through first flap 11 and second flap 12, the end of second Pin 18 protruding from second flap 12 is locked in nut 15 (see fig. 4) which protrudes thereon, and second spring 181 is fitted over second Pin 18 between first flap 11 and second flap 12 to provide a restoring force to second Pin 18.

As shown in fig. 2, the escape mechanism 1 for a power slide rail of a vehicle seat according to a preferred embodiment of the present invention further includes two rubber washers 19 interposed between the stopper 14 and the nut 15, respectively.

Fig. 3 shows an installation environment of an escape mechanism 1 for a power slide of a vehicle seat according to a preferred embodiment of the present invention, wherein a first blocking piece 11 is located below a lower slide 3, a second blocking piece 12, two stopping blocks 14, a nut 15 and a screw rod 16 are located between an upper slide 2 and the lower slide 3, and two rivets 13 are respectively disposed through the first blocking piece 11, the lower slide 3, the second blocking piece 12 and the two stopping blocks 14 from bottom to top, so as to relatively fix the escape mechanism 1 to the lower slide 3.

Fig. 4 shows a conventional state of escape mechanism 1 for a power slide of a vehicle seat according to a preferred embodiment of the present invention, in which first pin 17 and second pin 18 are inserted into a square hole structure on the bottom side of nut 15 and locked, respectively, to prevent nut 15 from rotating, thereby securing the axial strength of screw 16.

Fig. 5 shows the escape function state of the escape mechanism 1 for the electric slide rail of the vehicle seat according to a preferred embodiment of the present invention, after a collision occurs in a normal state, the pull cable is manually driven to pull the first pin 17 and the second pin 18 out of the nut 15 synchronously, so that the linear motion of the screw rod 16 can drive the nut 15 to rotate, and the slide rail is unlocked, so that the slide rail can realize the front and back adjustment function, thereby achieving the purpose of escape.

When the backrest of the seat is adjusted to the zero gravity state as shown in fig. 6, fig. 7 shows the zero gravity functional state of the escape mechanism 1 for the power slide rail of the vehicle seat according to one preferred embodiment of the present invention, a signal is input to the second pin 18 to pull it out downwards, i.e., to unlock the second pin 18, and the first pin 17 is left inserted into the square hole structure at the bottom side of the nut 15 to be locked, so that the basic collision strength is ensured (speed <30 Km/h).

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and various modifications may be made to the above-described embodiment of the present invention. All simple and equivalent changes and modifications made according to the claims and the content of the specification of the present application fall within the scope of the claims of the present patent application. The invention has not been described in detail in the conventional technical content.

Claims

1. An escape mechanism for an electric slide rail of a vehicle seat is characterized by comprising two stop blocks, a nut, a screw rod, a first pin and a second pin, wherein the first pin and the second pin have different strengths; under the normal state, the first pin and the second pin respectively extend along a second direction which is perpendicular to the first direction, and one ends of the first pin and the second pin extend into the nut to be matched with each other so as to prevent the nut from rotating to realize the front-back adjusting function of the seat; in the escape state, the tail ends of the first pin and the second pin are respectively disengaged from the nut, so that the linear motion of the screw rod drives the rotation of the nut to realize the front-back adjustment function of the seat; in the zero-gravity functional state of the seat in the lying position, the end of the second pin is disengaged from the nut and the end of the first pin is retained to extend into the nut for engagement to ensure basic crash strength.

2. The escape mechanism of claim 1 further comprising a first stop and a second stop fixed in spaced relation to one another in the second direction, wherein the end of the first pin that extends out of the second stop engages the nut.

3. The escape mechanism of claim 2 further comprising a first spring, wherein the first spring is disposed on the first pin between the first catch and the second catch to provide a restoring force to the first pin.

4. The escape mechanism of claim 2 wherein the end of the second pin projecting through the second stop engages in the nut.

5. The escape mechanism of claim 4 further comprising a second spring disposed on the second pin between the first catch and the second catch to provide a restoring force to the second pin.

6. The escape mechanism of claim 4 wherein the first and second pins are each connected to a manual cable.

7. The escape mechanism of claim 4 wherein the second pin is communicatively coupled to the seat back.

8. The escape mechanism of claim 2 further comprising a fastener disposed through the first blocking piece, the second blocking piece and the two blocking pieces to relatively secure the first blocking piece, the second blocking piece and the two blocking pieces.

9. The escape mechanism of claim 8 wherein the escape mechanism is mounted to the power slide of the vehicle seat by fasteners.

10. The escape mechanism of claim 9 wherein the power slide of the vehicle seat comprises an upper slide and a lower slide, the first catch is located below the lower slide, the second catch, the two stops, the nut, and the screw are located between the upper slide and the lower slide, and the fastener is disposed through the first catch, the lower slide, the second catch, and the two stops, respectively, to fix the escape mechanism to the lower slide.