Method for producing motor vehicle door locks with pawl placed in an oblique manner

Patent metadata

Field	Value
Publication number	US-9879452-B2
Application number	US-201314649944-A
Country	US
Kind code	B2
Filing date	Dec 11, 2013
Priority date	Dec 12, 2012
Publication date	Jan 30, 2018
Grant date	Jan 30, 2018

Abstract

In order to minimize the sliding friction between the locking parts, that is, between the pawl and the rotary latch of a motor vehicle door lock, it is advantageous if, during the production process, the different latch surfaces of both locking parts are provided with a stamped contour have straight grooves and also with a stamped contour, characterized in that the provided grooves are oblique. The grooves which are oblique to the latch surface on the pawl can be produced such that the entire pawl or also the rotary latch are connected in an oblique manner to the base of the lock case housing which can be produced in several ways. Between the straight grooves and the oblique grooves, at least two coverings are provided which ensure that both locking parts are in mutual contact reducing the friction.

First claim

The invention claimed is:

1. Method for producing motor vehicle door locks with the locking mechanism parts catch and pawl, the method comprising:
stamping the catch and pawl resulting in straight contours and vertical or near vertical edges with corresponding latch surfaces on the catch and pawl,
attaching the catch with its straight stamped contour to a first seat on a base of a lock case housing and arranging the latching surfaces of the catch perpendicular to the base,
attaching the pawl to a second seat on the base such that the pawl is arranged in a specified angle with respect to a plane of the base surrounding the second seat so that the latching surface of the pawl is not parallel to or is oblique to the latching surface of the catch in order to prevent meshing of the stamped contours of both lock mechanism parts and wherein, after attaching the pawl to the second seat, the pawl is obliquely angled relative to the plane by the specified angle.

2. Method according to claim 1 , wherein the pawl is offset by an angle of 5-8° relative to the plane and is pivotably fixed to the base in which this angle applies for a pawl of approx. 4 mm thickness and a distance of the grooves of 0.15-0.30 mm constituting the stamped contour of the catch and pawl.

3. Method according to claim 1 , wherein the base contains a seat for the pawl arranged in an oblique manner on the plane.

4. Method according to claim 3 , wherein, using a conventional connection of the pawl, the seat is connected to the base by means of a seat containing an oblique support surface.

5. Method according to claim 4 , wherein the pawl is obliquely retained by a plastic coating, lying flat on the base and is connected to the housing.

6. Method according to claim 5 , wherein the coating is a rectangular plastic body, in which the pawl is retained whilst being offset by an angle required for obtaining an oblique stamped contour on the pawl latch surface in relation to the straight stamped contour of the catch latch surface.

7. Method according to claim 1 , wherein the pawl is obliquely retained by a plastic coating, lying flat on the base and is connected to the housing.

8. Method according to claim 7 , wherein the coating is a rectangular plastic body, in which the pawl is retained whilst being offset by an angle required for obtaining an oblique stamped contour on the pawl latch surface in relation to the straight stamped contour of the catch latch surface.

9. Method according to claim 1 , further comprising, after stamping of the catch and pawl, covering the catch and pawl with a coating except for the latch surfaces.

10. Method according to claim 1 , wherein the base surrounding the first seat is on the plane.

11. Method according to claim 1 , wherein the latch surfaces of the catch and pawl rub against each other only at points in which the straight grooves on the catch and the straight grooves on the pawl are obliquely aligned relative to each other.

12. Motor vehicle door lock containing a catch and a pawl retaining the catch in a closed state, wherein the catch and pawl contain corresponding latch surfaces on their vertical edges that include straight contours, produced during stamping, wherein the catch is arranged on a first seat on a base of a lock case housing and the latching surface of the catch is perpendicular to the base; wherein the pawl is connected to a second seat on the base and the pawl is arranged in a specified angle with respect to a plane of the base surrounding the second seat such that the latch surface of the pawl is not parallel to or is oblique to the latch surface of the catch in order to prevent meshing of stamped contours of both locking mechanism parts, wherein the pawl is obliquely angled relative to the plane by the specified angle.

13. Motor vehicle door lock according to claim 12 , wherein the pawl is angled relative to the plane by 5-8° and is arranged on the base.

14. Motor vehicle door lock according to claim 13 , wherein the pawl is fixed in a box-shaped coating, forming a flat base and being offset by the specified angle.

15. Motor vehicle door lock according to claim 12 , wherein by means of a seat, providing a connection to the base, the pawl is formed obliquely on the base or that the arrangement contains an oblique support surface for the pawl and a usual connection.

16. Motor vehicle door lock according to claim 15 , wherein the pawl is fixed in a box-shaped coating, forming a flat base and being offset by the specified angle.

17. Motor vehicle door according to claim 12 , wherein the pawl is fixed in a box-shaped coating, forming a flat base and being offset by the specified angle.

18. Motor vehicle door lock according to claim 12 , wherein the catch and pawl further comprise a coating except on the latch surfaces.

19. Motor vehicle door lock according to claim 12 , wherein the base surrounding the first seat is on the plane.

20. Motor vehicle door lock according to claim 12 , wherein the latch surfaces of the catch and pawl rub against each other only at points in which the straight grooves on the catch and the straight grooves on the pawl are obliquely aligned relative to each other.

Assignees

• Kiekert Ag

Inventors

• Bendel Thorsten
• Pohle Werner
• Waldmann Thomas

Classifications

• B21D51/48

  Making crown caps · CPC title

• Y10T292/1082

  Motor · CPC title

• E05B85/26

  Cooperation between bolts and detents · CPC title

• Y10T29/49886

  to roughen surface · CPC title

• E05B85/243 Primary

  with a bifurcated bolt · CPC title