CN105715772B

CN105715772B - Position adjustment drive, method for producing the same, and mechanism for the same in a motor vehicle

Info

Publication number: CN105715772B
Application number: CN201510949733.4A
Authority: CN
Inventors: K.奥贝尔勒
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2014-12-19
Filing date: 2015-12-18
Publication date: 2020-05-12
Anticipated expiration: 2035-12-18
Also published as: CN105715772A; DE102014226584A1

Abstract

The invention relates to a position adjustment drive, a method for the production thereof and a mechanism for the same in a motor vehicle, in particular a mechanism and a method for the production of a position adjustment drive (1), comprising a holding body (2), in particular a housing or a housing section of the position adjustment drive (1); and-a shaft pin (4) made of a stronger material than the holding body (2); wherein the axle pin (4) has a fastening section (41) which is held in a bore (21, 22) of the holding body (2).

Description

Position adjustment drive, method for producing the same, and mechanism for the same in a motor vehicle

Technical Field

The invention is directed to a position adjusting drive (Stellgeberantriebe), such as a window lifter drive, for use in a motor vehicle and a method of manufacturing the same.

Background

Position adjustment drives are used in motor vehicles in a wide variety of ways. It typically has a position adjusting motor, a transmission and an output shaft or output shaft to provide force or torque externally.

Electrical window lifters and the like, for example in motor vehicles, have a position control drive, the output shaft of which is connected to a pinion or a cable linkage for providing a control force or a control torque. Conventionally, alternating transverse forces act on the output shaft, so that the output shaft should be able to be constructed securely.

The embodiment variants of the output shaft of such position adjustment drives described so far provide plastic shafts, which are each subjected to a high load depending on the field of use. These plastic shafts can deform and cause damage or destruction of the position adjustment drive, especially at higher temperatures.

Alternative embodiments provide for the axle pin, which is injection-molded as an output shaft into the plastic housing of the position controller, to be made of a more weight-bearing material, such as steel or brass.

The rotatable running wheel is held on the axle pin and is secured in a circumferential groove of the axle pin by a washer and a securing ring. The fastening of the running wheel by means of the washer and the securing ring means further components which make the assembly of the position-adjusting drive more costly overall.

Disclosure of Invention

The object of the invention is to provide a mechanism for a position adjustment drive, in which the output shaft is sufficiently robust and easy to assemble. In particular, the number of components to be assembled should be reduced.

This object is achieved by a mechanism for a position-adjusting drive (Stellgeberantrieb) according to claim 1 and a position-adjusting drive according to the accompanying claims.

Further embodiments are given in the dependent claims.

According to a first aspect there is provided a mechanism for a position adjustment drive comprising:

a holding body, in particular a housing or a housing section of a position adjustment drive;

-an axle pin made of a stronger material than the retaining body;

wherein the axle pin has a fastening section which is held in the bore of the holding body.

The above-described mechanism for a position adjustment drive has the idea of providing a shaft pin as the output shaft, which shaft pin has sufficient robustness for receiving transverse forces and can be inserted into a holding body, which may be part of the housing of the position adjustment drive. This results in a mechanism for a position adjustment drive having a holding body and an output shaft, on which a suitable running wheel, for example a gear wheel, a fan wheel or a pulley, can be attached.

The possibility of first separately forming the pivot pin and then connecting the retaining body of the position control drive with the running wheel during assembly avoids the disadvantage of the position control housing being produced in one piece with the output shaft or the retaining body being fixed to the output shaft, in particular by means of a material encapsulation by means of injection molding.

The fastening section can furthermore be provided with an external thread which is held in a bore of the retaining body, wherein the bore is in particular designed as a blind bore.

Alternatively, the fastening section can be designed as a cylindrical insert which is held in a bore of the holding body by means of a fastening element, wherein the bore is designed in particular as a through-bore through the holding body.

Furthermore, the holding body can be made of a plastic material and/or the pivot pin can be made of a metallic material, in particular steel or brass.

According to one embodiment, the axle pin can have a guide region for receiving the running wheel, which guide region is provided with a retaining region at the end opposite the fastening section in order to prevent axial displacement of the running wheel.

The holding region can be designed in particular as a collar or ring. Furthermore, the flange section can be arranged opposite the guide section with respect to the holding section.

According to another aspect, a position adjustment drive is provided, comprising:

-the above-mentioned mechanism;

a running wheel rotatably arranged on an output shaft formed with a shaft pin.

The position adjustment drive can comprise, in particular, a position adjustment motor. Furthermore, a movable part can be provided, which is arranged on the axle pin and is coupled to the working wheel in a form-fitting manner.

In the method according to the invention for producing a transmission-drive unit, a bore is first formed in the bottom of the transmission housing and the axle pin is then pushed into the bearing seat of the running wheel until its retaining section bears axially against the running wheel, and then a fastening section for fixing the axle pin in the transmission housing is inserted into the bore. In this case, it is advantageously possible to thread the external thread of the fastening section into the inner wall of the bore or to thread a nut onto the end of the fastening section.

Drawings

Embodiments are further explained below with reference to the drawings. In the drawings:

fig. 1 shows a schematic cross section of an output region of a position adjustment drive; and is

Figure 2 shows a pivot pin for installation into a position adjustment drive according to one embodiment,

fig. 3 shows an alternative embodiment of the position adjustment drive.

Detailed Description

Fig. 1 shows a cross-sectional view of an output region of a position adjustment drive 1 having a housing section which is designed as a holding body 2 for an output shaft a of the position adjustment drive 1. The holding body 2 or the housing section can be formed from a plastic material and thus be variably established in terms of its shape.

The output shaft a is intended to receive a running wheel 3 or the like. The running wheel 3 is arranged rotatably about the output shaft a and is held on the output shaft a by a bearing 6. The running wheel 3 can have a toothed ring 31 which is in engagement with a worm 5 which is coupled to or can be driven by a position control motor (not shown).

The output shaft a is designed as a cylindrical pivot pin 4, which is shown as a separate component with respect to the holding body 2. The pin 4 is preferably made of a solid material, in particular a metallic material, such as brass or steel, and can thus provide a high degree of stability with respect to lateral forces.

The axle pin 4 is shown in more detail in fig. 2. The axle pin 4 has a fastening section 44, a guide section 42 for receiving the running wheel 3, a retaining section 43 and a flange section 44.

The axle pin 4 is fastened in the housing 2 by means of the fastening section 41. The fastening section 41 can be provided with an external thread 45, which external thread 45 is screwed into the holder body 2 for fastening in a suitable blind hole 21. In the embodiment of the retaining body 2 as an injection-molded part, the blind hole 21 can be provided by means of a form fit or can be subsequently introduced by drilling. The blind hole 21 can preferably be configured with a diameter which is smaller than the outer diameter of the external thread 45 of the fastening section 41, so that when the shaft pin 4 is screwed into the blind hole 21, the external thread 45 cuts into the side wall of the blind hole 21 and thus a secure screw-off-proof retention is achieved. The length of the fastening section 41 of the pivot pin 4 is preferably selected such that a sufficient retention against transverse forces is provided even in retaining bodies 2 made of plastic, i.e. a softer material. The external thread 45 can be provided with a reverse rotation protection, for example, by a slotted thread beam.

When the axle pin is fitted to the holding body 2, the guide section 42 projects beyond the holding body 2 and serves to receive the running wheel 3 so that it can rotate about the guide section 42. When the running wheel 3 is mounted on the holding body 2, the running wheel 3 is merely placed on the guide section 42 of the axle pin 4 and then the axle pin 4 is inserted into the holding body 2 by means of the fastening section 41, in particular by being screwed in.

In order to hold the running wheel 3 on the axle pin 4 against movement in the axial direction, a fastening section 43 is provided in the form of a circumferential retaining ring, for example in the form of an axle ring. The holding section 43 can be formed integrally with the axle pin 4 or can be subsequently attached to the axle pin 4. The retaining section 43 in the form of a collar replaces the retaining of the running wheel 3 in the radial direction by means of a washer or a securing ring, as is known from the prior art. This reduces the number of components to be used during assembly and thus also reduces the number of assembly steps.

The receiving section 44 of the pivot pin 4 is opposite the guide section 42 with respect to the holding section 43 and serves to hold further movable components such as an output pinion, a cable linkage or the like. They can be connected in a form-fitting manner to the running wheels 3 in a suitable manner, so that the output torque of the position-adjusting drive 1 can be provided.

Fig. 3 shows an alternative embodiment of the position adjustment drive 1. In the embodiment shown, the fastening section 41 is not provided with an external thread 45 but rather as a cylindrical insert 46. Instead of the blind hole 21, a through-hole 22 can then be provided in the retaining body 2, the inner diameter of which through-hole 22 substantially corresponds to the outer diameter of the fastening section 41, so that the axle pin 4 is held securely and in a tilt-proof manner in the retaining body 2.

In order to prevent the pivot pin 4 from slipping out of the through-hole 22 of the holding body 2, a fastening element 47 is furthermore provided, for example in the form of a nut on the end of the fastening section 41 opposite the guide section 42, which engages back into the edge of the through-hole 22 of the holding body 2 on the side opposite the pivot pin 4 and thus forms a positive fit.

Claims

1. Mechanism for a position adjustment drive (1), comprising:

-a holding body (2), wherein the holding body (2) is a housing or a housing section of the position adjustment drive (1); and

-an axial pin (4) made of a stronger material than the retaining body (2);

wherein the axle pin (4) has a fastening section (41) which is held in a preformed hole (21, 22) of the holding body (2).

2. Mechanism according to claim 1, wherein the fastening section (41) is provided with an external thread (45) which is held in a hole (21, 22) of the holding body (2).

3. Mechanism according to claim 1, wherein the fastening section (41) is configured as a cylindrical insert (46) which is held in a bore (21, 22) of the retaining body (2) by means of a fastening element (47) arranged outside the bore (21, 22).

4. The mechanism according to any of the preceding claims, wherein the retaining body (2) is constructed from a plastic material and/or the axle pin (4) is constructed from a metal material.

5. Mechanism according to claim 1, wherein the axle pin (4) has a guide section (42) for receiving the running wheel (3), which guide section is provided on the side opposite the fastening section (41) with a retaining section (43) which forms an axial stop for the running wheel (3).

6. Mechanism according to claim 5, wherein the retaining section (43) is configured as a radially extending collar, which collar is manufactured integrally with the axle pin (4).

7. Mechanism according to claim 5, wherein a receiving section (44) is provided opposite the guide section (42) with respect to the holding section (43), which serves as a bearing shaft for further transmission mechanism components.

8. The mechanism according to claim 5, wherein the holding body (2) is configured as a transmission housing bottom and the holes (21, 22) are configured within an axial cylindrically shaped projection of the transmission housing bottom, which projection is configured as a radial support for the running wheels (3).

9. Mechanism according to claim 2, wherein the holes (21, 22) are configured as blind holes (21).

10. Mechanism according to claim 3, wherein the holes (21, 22) are configured as through holes (22) through the holding body (2).

11. Transmission-driver unit (1) comprising:

-a mechanism according to any one of claims 1 to 10;

-a running wheel (3) rotatably mounted on a shaft pin (4) arranged along an output shaft (a) of the position adjustment drive (1), wherein the running wheel (3) meshes with an external toothing into a worm (5) which can be driven by an adjustment motor.

12. Transmission-driver unit (1) according to claim 11, characterised in that the running wheel (3) is constructed in one piece and has an output pinion for meshing into a further transmission component, wherein the output pinion is arranged radially within and axially offset from the external toothing.

13. Transmission-driver unit (1) according to claim 12, characterized in that the axle pin (4) has a guide section (42) for receiving a running wheel (3), which is provided on the side opposite the fastening section (41) with a retaining section (43) which forms an axial stop for the running wheel (3), wherein the output pinion is supported directly on the guide section (42) in the radial direction, and the retaining section (43) is arranged completely axially and radially within the output pinion.

14. Method for manufacturing a transmission-driver unit (1) according to one of claims 11 to 13, characterized in that first a hole (21, 22) is constructed in the bottom of the transmission housing (2) and thereafter the axle pin (4) is pushed into the hub of the running wheel (3) until its retaining section (43) abuts axially against the running wheel (3) and thereafter the fastening section (41) is inserted into the hole (21, 22) for the purpose of fixing the axle pin (4) in the transmission housing (2).

15. Method according to claim 14, characterized in that the external thread (45) of the fastening section (41) is screwed into the inner wall of the hole (21, 22).

16. Method according to claim 14 or 15, characterized in that the fastening section (41) is first inserted into the hole (22) configured as a through-hole until the axle pin (4) bears axially with a radial projection against the edge of the hole (22) on the output side, and thereafter the fastening section (41) is fastened to the bottom by means of a fastening element (47).

17. Method according to claim 14, characterized in that the holes (21, 22) are constructed in the bottom of the transmission housing (2) by means of plastic injection molding.

18. Method according to claim 15, characterized in that the external thread (45) of the fastening section (41) is screwed into the inner wall of the hole (21, 22) by means of a self-tapping thread.

19. Method according to claim 16, characterized in that a threaded nut is screwed onto the end of the fastening section (41).