CN107206962B

CN107206962B - Seat belt lock presenter

Info

Publication number: CN107206962B
Application number: CN201580075921.7A
Authority: CN
Inventors: A·克莱因; J·克拉森
Original assignee: Trw Automobile Co Ltd
Current assignee: Trw Automobile Co Ltd
Priority date: 2015-01-07
Filing date: 2015-12-21
Publication date: 2019-12-31
Anticipated expiration: 2035-12-21
Also published as: WO2016110310A1; CN107206963A; CN107428310B; DE112015005905A5; DE112015005904A5; WO2016110306A1; WO2016110308A1; CN107206962A; DE112015005898A5; WO2016110309A1; DE112015005906A5; WO2016110307A1; DE102015000019A1; CN107428310A; CN107206963B

Abstract

A seat belt lock presenter has a base body (12) which can be stationarily mounted in a vehicle and a seat belt lock (16) which is mounted movably on the base body (12). A spindle drive (32) for moving the belt buckle (16) is provided, wherein a spindle (36) of the spindle drive (32) is connected in a rotationally fixed manner to the belt buckle (16), and the spindle (36) is connected to a slide (14) which is movable along the base body (12).

Description

Seat belt lock presenter

Technical Field

The present invention relates to a seat belt lock presenter.

Background

The belt lock presenter facilitates the fastening and unfastening of the safety belt by reversibly moving the belt lock via the drive means from a pulled-back position, in which the belt lock is not an obstacle for the vehicle occupant in normal driving operation, into a moved-out position, in which the belt lock is easily accessible for the vehicle occupant.

DE102004017457a1, for example, discloses a seat belt buckle having a spindle drive in which an electric motor rotates a spindle, as a result of which a spindle nut coupled to the seat belt buckle via a cable is displaced on the spindle. However, the disadvantage here is the complex construction of the belt lock presenter.

Disclosure of Invention

The object of the invention is to provide a seat belt lock presenter which is simple and compact in design.

According to the invention, this is achieved with a belt lock presenter having a base body which can be mounted stationary in a vehicle and a belt lock which is mounted displaceably on the base body, wherein a spindle drive is provided on the base body, which spindle drive moves the belt lock and whose spindle is connected in a rotationally fixed manner to the belt lock and is connected to a slide which is displaceable along the base body. In this way, the belt lock is coupled directly and in close proximity (unittellbar) to the spindle drive, which not only reduces the number of components required, but also consequently reduces the manufacturing costs and the structural size of the entire belt lock presenter.

The rotationally fixed connection of the spindle to the belt buckle is achieved, for example, by a fastening element being provided on the upper end of the spindle, to which the belt buckle is fastened. The fixing geometry of the fixing element can be selected such that the same type of belt lock can be used not only in conjunction with a belt lock presenter, but also for stable fixing in a vehicle.

For a design that is as compact as possible, the slide can at least partially surround the base body. The fastening of the slide on the spindle can be effected, for example, via a fastening element on the upper end of the spindle. In this embodiment, the base body is at least partially accommodated in the interior of the slide, as a result of which an additional housing can be dispensed with, which further reduces the number of components and the required installation space.

At least one ball cage can be arranged between the base body and the slide, on which the slide is mounted for linear movement along the base body. The use of one or more ball holders, in particular in the form of a linear ball holder with a plurality of balls aligned along a straight line, enables a light and low-noise mounting of the slide on the base body.

In order to move the spindle of the spindle drive reversibly in the axial direction, the spindle nut of the spindle drive, which causes the axial movement of the spindle, can be driven in the desired rotational direction.

The spindle nut is preferably rotatably mounted on the base body.

The spindle nut can be accommodated, for example, in a bearing block which is separated, in particular, perpendicularly to the axial direction, which allows a simple preassembly of the spindle drive before the spindle drive is fixed to the base body.

The bearing block is preferably surrounded by a sliding block, so that here again no separate housing is required and the compactness of the entire belt lock presenter is increased.

In the bearing block, a bearing for an electric motor for driving the spindle nut can also be provided, so that the entire drive can be arranged on the base body and can be protected at least for the most part by the slide against environmental influences.

In order to transmit the drive force of the electric motor to the spindle nut, an intermediate transmission is preferably provided which is coupled to the drive pinion of the electric motor and which has a pinion which meshes with the spindle nut. In this way, a force transmission with a desired transmission ratio can be achieved in a compact arrangement. The intermediate drive is preferably likewise mounted on the bearing block and can be preassembled on this bearing block.

The intermediate transmission comprises, for example, two pinions arranged on one axis, one of which meshes with the drive pinion of the electric motor and the other of which meshes with the external toothing of the spindle nut.

Drawings

The invention is explained in more detail below with the aid of embodiments and with reference to the drawings. In the drawings:

fig. 1 shows a seat belt lock presenter according to the invention in a fully retracted position in a schematic perspective view;

figure 2 shows the seat belt lock presenter of figure 1 in a fully removed position;

figure 3 shows a schematic perspective view of the seat belt lock presenter of figure 1 without the slider;

fig. 4 shows the assembly shown in fig. 3 in a front view;

FIGS. 5 and 6 show schematic views of a spindle drive of a seat belt lock presenter according to the present invention;

figures 7 and 8 show a schematic view of the spindle drive together with the bearing block and the electric motor; and

fig. 9 and 10 show exploded views of a seat belt lock presenter according to the present invention.

Detailed Description

Fig. 1 and 2 show a seat belt lock presenter 10 having a rigid base body 12 which can be stably fixed in a vehicle and a slider 14 which is movably supported on the base body 12 in an axial direction a of the base body. The slide 14 at least partially surrounds the base body 12 in the circumferential direction, wherein the slide 14 is partially completely closed in the circumferential direction in this example (see also fig. 9).

Fig. 1 shows the belt lock presenter 10 in a fully retracted position, which is occupied during normal driving operation. Fig. 2 shows the seat belt lock presenter 10 in the maximum extended position occupied for the fastening and unfastening of the seat belt. The direction of movement V, along which the belt lock 16 is reversibly moved by the belt lock presenter 10, coincides with the axial direction a.

In this case, a fastening eye 18 is formed on the base body 12, via which the belt buckle presenter 10 is fastened to the vehicle.

The base body 12 has a back plate 20 and two narrow sides 22 extending in the axial direction a, which protrude laterally from the back plate 20.

The box-shaped slide 14 has two narrow sides 24 which are arranged parallel to the narrow sides 22 of the base body 12. Between the outer side of the narrow side 22 and the inner side of the narrow side 24, a plurality of ball retainers 26 are provided as bearing parts, which are accommodated freely movably in the axial direction a in guide sections 28 on the narrow side 22 of the base body 12. This is also shown in fig. 3, 4 and 10. The ball cage 26 is designed here as a linear component with four balls each and allows a uniform and low-noise movement of the slide 14 along the base body 12 in a known manner. A total of four ball retainers 26 are provided, which are each arranged on the outer edge of the narrow side 22. A stop 30 on the axial end of the narrow side 22 prevents the ball cage 26 from leaving the guide 28. In this case, a stop 30 is formed on the belt lock-side end by a rivet which is inserted after the ball cage 26 has been pushed into the guide 28.

The belt buckle 16 is reversibly moved along and counter to the displacement direction V by a spindle drive 32 arranged on the base body 12. The spindle drive 32 is shown in more detail in fig. 5 and 6, for example.

The spindle drive 32 comprises a rotatably mounted, driven spindle nut 34 and a spindle 36 which is movable in the displacement direction V by rotation of the spindle nut 34.

The spindle 36 is connected at its end on the belt lock side to the belt lock 16 in a rotationally fixed manner via a fixing element 38, here in the form of a plate.

In order to prevent the spindle 36 from rotating together with the spindle nut 34, the fastening element 38 is screwed on the slide 14 in a rotationally fixed manner, as is shown, for example, in fig. 9. For this purpose, in this example, two fastening eyes 40 are provided on the belt-lock-side end of the slider 14.

The spindle 36 is provided, at least over the maximum range of movement, with a thread which engages in an internal thread of the spindle nut 34, as is known from spindle drives.

The spindle nut 34 is accommodated in an axially immovable, but rotatable, bearing block 42, which is fixedly connected to the main body 12.

The bearing block 42 is divided vertically into two sections 42a, 42b (see fig. 10), between which the spindle nut 34 is supported. In this example, the support block 42 is bolted to the backing plate 20 of the base 12 via a frame 44.

The spindle nut 34 is driven via an electric motor 46, which is likewise fastened to the base body 12. The bearing block 42, more precisely the section 42b of the bearing block 42 remote from the belt lock, forms a bearing for the end of the electric motor 46 on the belt lock side.

In order to reduce the installation space in the direction pointing into the vehicle, in this example, recesses 48 are provided in the slide 14 in the front plate 14a and the back plate 14b, respectively, into which the electric motor 46 projects.

A drive pinion 50 is located on the shaft of the electric motor 46, which drive pinion meshes with a first pinion 52 of an intermediate transmission 54. The intermediate transmission 54 has a second pinion 56 which is arranged on a common shaft with the first pinion 52. The second pinion 56 meshes with an external toothing 58 on the spindle nut 34, whereby the rotary movement of the pinion 50 can be transmitted to the spindle nut 34 with a desired transmission ratio. All teeth are designed here as helical teeth. The shaft of the intermediate transmission 54 is likewise mounted in the bearing block 42, as can be seen in fig. 10.

The shaft of the electric motor 46, the shaft of the intermediate transmission 54 and the main shaft 36 are oriented parallel to one another.

The spindle drive 32 together with the electric motor 46 can be preassembled in the bearing block 42 as a separate component, as is shown in fig. 7 and 8.

In addition, two position sensors 60 for detecting the spindle position are provided in this example. These position sensors 60 are also mounted on the base body 12.

Claims

1. Safety belt lock presenter having a base body (12) which can be mounted stationary in a vehicle and a safety belt lock (16) which is mounted displaceably on the base body (12), wherein a spindle drive (32) is provided, wherein the spindle drive moves the safety belt lock (16) and a spindle (36) of the spindle drive (32) is connected in a rotationally fixed manner to the safety belt lock (16), and the spindle (36) is connected to a slide (14) which is displaceable along the base body (12), characterized in that the slide (14) at least partially surrounds the base body (12), and in that at least one ball cage (26) is provided between the base body (12) and the slide (14), on which the slide (14) is mounted for linear displacement along the base body (12).

2. The seat belt lock presenter according to claim 1 wherein a securing element (38) is provided on the upper end of the spindle (36) to which the seat belt lock (16) is secured.

3. The seat belt lock presenter according to claim 1 or 2 wherein a spindle nut (34) of the spindle drive (32) which causes axial movement of a spindle (36) is rotatably supported on the base body (12).

4. The seat belt lock presenter according to claim 1 wherein the spindle nut (34) is received in a bearing block (42) that is spaced apart perpendicular to the axial direction (a).

5. The seat belt lock presenter according to claim 1 wherein the slide (14) surrounds a support block (42).

6. The seat belt lock presenter of claim 4 wherein the bearing block (42) has a bearing for an electric motor (46) that drives a spindle nut (34).

7. The seat belt lock presenter according to claim 4 wherein there is an intermediate drive (54) coupled to a drive pinion (50) of the electric motor (46) driving the spindle nut (34) and having a pinion (56) meshing with the spindle nut (34).

8. The seat belt lock presenter according to claim 7 wherein the intermediate drive comprises two pinions (52, 56) arranged on one shaft, one of which is in mesh with a drive pinion (50) of the electric motor (46) and the other of which is in mesh with an external toothed portion (58) of the spindle nut (34).