Function-optimized bevel gear differential with optimized contact surface

Abstract

The invention relates to a bevel gear differential (1) comprising a drive gear (2), at least one compensation gear (3), two output gears (4) and two differential housings (7, 8). A pin (10) received in the drive gear (2) supports at least one compensation gear (3) and the at least one compensation gear (3) meshes with two output gears (4), where the drive gear (2) connects the two differential housings (7, 8) for common rotation and each output gear (4) is supported by a respective differential housing (7, 8). According to the invention, at least the region of the pin receiving area (11) of the drive gear (2) has an axial expansion in the region within the differential housing (7, 8) in order to provide an enlarged contact surface (5) for contacting the compensation gear (3) or for a spherical disc (6) in contact with the compensation gear (3).

Description

TECHNICAL FIELD

[0001] The invention relates to a bevel differential, which has a drive gear, which is arranged between and fastened to two bevel gear halves. A compensation gear of the bevel differential is mounted on a common pin, which is inserted into a receiving area of the drive gear. BACKGROUND

[0002] DE 10 2018 124 491 A1 shows a bevel differential, in which the end face (reference 10) arranged radially within the gear pitch circle is flat.

[0003] WO 2022 / 127 780 A1 shows a bevel differential. SUMMARY

[0004] It is an object of the invention to provide an improved bevel differential.

[0005] According to the invention, this object is therefore achieved by a bevel differential, which has a drive gear, at least one compensation gear, two output gears and two differential housings, wherein a pin received in the drive gear supports the at least one compensation gear and the at least one compensation gear meshes with the two output gears, wherein the drive gear connects the two differential housings for common rotation and each output gear is supported by the respective differential housing, wherein the area of the pin receiving area of at least the drive gear has an axial expansion in the area within the differential housing in order to provide an enlarged contact surface for contacting the compensation gear or for a spherical disc in contact with the compensation gear.

[0006] According to the invention, the design of the pin receiving area in the drive gear optimizes the contact of the compensation gear (or indirectly via a spherical disc arranged between the compensation gear and the drive gear) in this common area with the contact surface of the drive gear, so that forces can be transmitted more reliably through the bevel differential from the drive gear via the compensation gear to the output gears.

[0007] According to the invention, the optimization is achieved by increasing the contact surface between the spherical disc (indirectly) or the compensation gear (directly) by making the axial width at the contact point greater than the pin receiving area in the drive gear. This maintains a good guidance in the area of the pin guide to the drive gear, wherein the support of the compensation gear or the spherical disc is improved.

[0008] According to the invention, the cross section in the area of the pin receiving area is constant in the circumferential direction, as Figure 2which can be seen in the illustration. This allows a circumferential groove to be formed for engagement with the respective differential housing. This facilitates the positioning of the differential housing to the drive pinion for the creation of the weld seam.

[0009] The widened contact surface is therefore wider than the diameter of the pin supporting the compensation gear.

[0010] Alternatively, the region of the pin-receiving area is not designed in the drive pinion to have a constant cross section in the circumferential direction. Thus, in the region of the pin of the bevel differential, the pin-receiving area is limited in the radial direction and in the circumferential direction and in the axial direction by the respective differential housing.

[0011] A further embodiment of the application provides that the two differential housings are each welded to the drive pinion in the region of the pin-receiving area.

[0012] Furthermore, in an advantageous embodiment of the application, the differential housings limit the pin-receiving area of the drive pinion in the axial direction. BRIEF DESCRIPTION OF DRAWINGS

[0013] Further advantageous embodiments of the application are described in the following figures. In the figures:

[0014] Figure 1 A bevel differential according to the application is shown, in which a longitudinal section is taken through the axis of symmetry of the pin; and

[0015] Figure 2 A bevel differential according to the application is shown, in which a longitudinal section is taken through the axis of symmetry of the pin; and Figure 1 A bevel differential according to the application is shown, in which a longitudinal section is taken through the axis of symmetry of the pin; and DETAILED DESCRIPTION

[0016] Figure 1A bevel gear differential 1 according to the invention is shown, wherein a longitudinal section passes through the longitudinal section of the axis of symmetry of pin 10. The bevel gear differential 1 has a drive gear 2 welded to differential housings 7 and 8 via weld seam 9. The teeth of the drive gear 2 are radially positioned outside the differential housings 7 and 8. Two output gears 4 and two compensating gears 3 are arranged in a known manner within the differential housings 7 and 8. The compensating gears 3 are mounted on the common pin 10 by means of their pin guides 12 and are in constant engagement with the compensating gears 4 via the teeth of the compensating gears. Pin 10 is held about a rotational axis 13 by a pin receiving area 11 in a rotationally fixed manner. The pin receiving area 11 is defined by the inner surface of the drive gear 2 and axially by the two differential housings 7 and 8, the inner surface of which is radially rearwardly disposed in the region of the pin receiving area 11. Pin 10 is rotatable about its axis of symmetry. Outside the contact portion between pin 10 and drive gear 2 and differential housings 7 and 8, drive gear 2 is axially widened to provide an enlarged contact surface 5 to the spherical disc 6. This axially widened portion has an elephant-foot-shaped cross-section outside the diameter of pin 10, and due to different cross-sectional views, it can... Figure 2 It is better seen in the middle.

[0017] Figure 2 It shows that according to Figure 1 The bevel gear differential 1 has a cross-section passing through pin 10. This shows not only a view of the teeth of the compensating gear 3, but also the profile of the contact surface 5 in the circumferential direction (about the axis of rotation 13), which, according to the invention, has been axially widened to increase the contact area between the contact surface 5 and the spherical disk 6. The contact surface 5 only partially contacts the spherical disk 6, i.e., partially contacts the spherical disk in the area where the spherical disk 6 and the contact surface 5 overlap. The peripherally maintained cross-section of the contact surface 5 forms a recessed receiving area for the first differential housing 7 and the second differential housing 8. The corresponding differential housings 7 and 8 are engaged in this receiving area and then connected to the drive gear 2 by means of a weld 9.

[0018] By according to Figure 1 and Figure 2 The embodiment illustrated in the figure achieves a larger contact surface 5 with the spherical disk 6, enabling better support of any force. In a similar embodiment without the spherical disk 6, where the compensating gear 3 is in direct contact with the drive gear 2, the same effect can be expected according to the invention, introduced by the improved force through the enlarged contact surface 5—located between the drive gear 2 and the compensating gear 3.

[0019] List of reference numerals

[0020] 1 - Bevel gear differential

[0021] 2 - Drive gear

[0022] 3 - Compensating Gear

[0023] 4 - Output gear

[0024] 5 - Contact Surface

[0025] 6 - Spherical disk

[0026] 7 - First differential housing

[0027] 8 - Second differential housing

[0028] 9 - Weld

[0029] 10 - Selling

[0030] 11 - Pin receiving area (drive gear)

[0031] 12 - Pin guide (compensating gear)

[0032] 13 - Axis of Rotation

Claims

1. A bevel gear differential (1), the bevel gear differential having a drive gear (2), at least one compensating gear (3), two output gears (4) and two differential housings (7, 8), wherein, A pin (10) received in the drive gear (2) supports at least one compensating gear (3), and the at least one compensating gear (3) meshes with the two output gears (4), wherein the drive gear (2) connects the two differential housings (7, 8) for common rotation, and each output gear (4) is supported by a corresponding differential housing (7, 8), wherein At least the area of ​​the pin receiving area (11) of the drive gear (2) has an axial extension in the area within the differential housing (7, 8) to provide an enlarged contact surface (5) for contacting the compensating gear (3) or a spherical disc (6) for contacting the compensating gear (3). Its features are, The area of ​​the pin receiving area (11) is designed to extend circumferentially within the drive gear (2) with a constant cross-section, and thus form a circumferential groove for engaging with the corresponding differential housing (7, 8).

2. The bevel gear differential (1) according to any one of the preceding claims. Its features are, The two differential housings (7, 8) are each welded to the drive gear (2) in the area of ​​the pin receiving area (11).

3. The bevel gear differential (1) according to any one of the preceding claims. Its features are, The differential housing (7, 8) axially restricts the pin receiving area (11) of the drive gear (2).

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