Planetary mechanism of transfer case

Abstract

The utility model relates to a planetary mechanism of a transfer case, and belongs to the technical field of automobile transfer case equipment. According to the technical scheme, a plurality of planet wheel shafts (11) are arranged on the outer circle of a planet carrier (10) in the circumferential direction, and planet wheels (9) are rotationally arranged on the planet wheel shafts (11) through planet wheel needle bearings (7); the end of the input shaft (1) is arranged in the planet carrier (10) and connected with the planet carrier (10) through the planet carrier bearing (5), the planet carrier bearing (5) and the input shaft (1) are fixed through the planet carrier bearing check ring (4), and the planet carrier bearing (5) and the planet carrier (10) are fixed through the planet carrier bearing clamping ring (12). The planetary reducer has the advantages that the input shaft is fixed to the planet carrier through the planet carrier bearing, the radial clearance and the axial clearance are small due to the clearance fit mode of the inner gear ring and the front shell, the bearing capacity is improved, noise is lowered, and operation stability and reliability are improved.

Description

Technical Field

[0001] The utility model relates to a planetary mechanism of a transfer case, belonging to the technical field of automobile transfer case equipment. Background Art

[0002] At present, in the prior art, automobile transfer cases rely on planetary mechanisms to reduce speed and increase torque. The planetary mechanisms currently rely on thrust plates to fix the input shaft and the planetary carrier assembly. However, due to large radial and axial clearances, the operating stability and reliability cannot meet the requirements of the transfer case. Utility Model Content

[0003] The utility model aims to provide a planetary mechanism of a transfer case, which relies on a planetary carrier bearing to fix an input shaft assembly and a planetary carrier assembly, reduces radial and axial clearances between the planetary carrier and the input shaft, and solves the above-mentioned problems existing in the background technology.

[0004] The technical solution of the utility model is:

[0005] A planetary mechanism of a transfer case comprises an input shaft assembly and a planet carrier assembly, wherein the planet carrier assembly comprises a planetary wheel needle bearing, a planetary wheel, a planet carrier and a planetary wheel shaft, wherein the outer circle of the planet carrier is provided with a plurality of planetary wheel shafts along the circumferential direction, and the planetary wheel is rotatably arranged on the planetary wheel shaft via the planetary wheel needle bearing; wherein the input shaft assembly comprises an input shaft, wherein the end of the input shaft is arranged in the planet carrier and connected via a planet carrier bearing, the planet carrier bearing and the input shaft are fixed via a planet carrier bearing retaining ring, and the planet carrier bearing and the planet carrier are fixed via a planet carrier bearing retaining ring.

[0006] Furthermore, the planetary gear is externally meshed with an inner gear ring, the outer side of the inner gear ring is provided with a rectangular spline, the inner side of the front shell body is provided with a rectangular groove, the rectangular spline of the inner gear ring is installed in the rectangular groove of the front shell body with clearance fit, and the inner gear ring is fixed to the front shell body through an inner gear ring retaining ring.

[0007] Furthermore, a bearing position 1 and a retaining ring mounting groove are provided on the inner side surface of the planetary carrier, a bearing position 2 and a retaining ring mounting groove 1 are provided on the input shaft, the inner ring of the planetary carrier bearing is installed on the bearing position 2, the planetary carrier bearing retaining ring is installed on the retaining ring mounting groove 1, the outer ring of the planetary carrier bearing is installed on the bearing position 1, and the planetary carrier bearing retaining ring is installed in the retaining ring mounting groove.

[0008] Furthermore, the input shaft is provided with a bearing position three and a retaining ring installation groove two, the input shaft bearing is installed on the bearing position three, the retaining ring installation groove two is provided with an input shaft bearing retaining ring, and the input shaft bearing is fixed to the input shaft through the input shaft bearing retaining ring.

[0009] Furthermore, a planetary wheel needle roller bearing washer is provided in the planetary wheel, and planetary wheel washers are provided between the two sides of the planetary wheel and the planetary carrier.

[0010] The positive effects of the utility model are as follows: the input shaft is fixed to the planetary carrier through the planetary carrier bearing, and the inner gear ring and the front housing are clearance-matched in a manner that the radial clearance and the axial clearance are small, thereby improving the load-bearing capacity, reducing noise, and improving the running stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of assembling the input shaft assembly and the planet carrier assembly of the utility model;

[0012] Figure 2 This is a schematic diagram of the input shaft assembly of the utility model;

[0013] Figure 3 This is a schematic diagram of the planet carrier assembly of the utility model;

[0014] Figure 4 This is a schematic diagram of the structure of the utility model;

[0015] Figure 5 This is a schematic diagram of the partial structure of the front housing of the utility model;

[0016] Figure 6 This is a schematic diagram of the structure of the inner gear ring of the utility model;

[0017] In the figure: input shaft 1, input shaft bearing retaining ring 2, input shaft bearing 3, planet carrier bearing retaining ring 4, planet carrier bearing 5, planet wheel washer 6, planet wheel needle roller bearing 7, planet wheel needle roller bearing washer 8, planet wheel 9, planet carrier 10, planet wheel shaft 11, planet carrier bearing retaining ring 12, inner gear ring 13, inner gear ring retaining ring 14, front housing 15, rectangular spline 16, rectangular groove 17, bearing position one 18, retaining ring mounting groove 19, bearing position two 20, retaining ring mounting groove one 21, bearing position three 22, retaining ring mounting groove two 23. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] See attached Figure 1 The present embodiment provides a planetary mechanism of a transfer case, comprising an input shaft assembly and a planet carrier assembly, wherein the planet carrier assembly comprises a planetary needle roller bearing 7, a planetary wheel 9, a planet carrier 10 and a planetary wheel shaft 11, wherein the outer circle of the planet carrier 10 is provided with a plurality of planetary wheel shafts 11 along the circumferential direction, and the planetary wheel 9 is rotatably arranged on the planetary wheel shaft 11 through the planetary needle roller bearing 7; the input shaft assembly comprises an input shaft 1, wherein the end of the input shaft 1 is arranged in the planet carrier 10 and connected through a planet carrier bearing 5, the planet carrier bearing 5 and the input shaft 1 are fixed through a planet carrier bearing retaining ring 4, and the planet carrier bearing 5 and the planet carrier 10 are fixed through a planet carrier bearing retaining ring 12.

[0020] See attached Figure 4-6 The planetary gear 9 is externally meshed with an inner gear ring 13, and a rectangular spline 16 is provided on the outer side of the inner gear ring 13. A rectangular groove 17 is provided on the inner side of the front housing 15. The rectangular spline 16 of the inner gear ring 13 is installed in the rectangular groove 17 of the front housing 15 with clearance fit. The inner gear ring 13 is fixed to the front housing 15 by an inner gear ring snap ring 14.

[0021] See attached Figure 2 and 3 A bearing position 18 and a retaining ring mounting groove 19 are provided on the inner side surface of the planet carrier 10, a bearing position 20 and a retaining ring mounting groove 21 are provided on the input shaft 1, the inner ring of the planet carrier bearing 5 is installed on the bearing position 20, the planet carrier bearing retaining ring 4 is installed on the retaining ring mounting groove 21, the outer ring of the planet carrier bearing 5 is installed on the bearing position 18, and the planet carrier bearing retaining ring 12 is installed in the retaining ring mounting groove 19.

[0022] See attached Figure 2 The input shaft 1 is provided with a bearing position 3 22 and a retaining ring mounting groove 23, the input shaft bearing 3 is installed on the bearing position 3 22, the retaining ring mounting groove 23 is provided with an input shaft bearing retaining ring 2, and the input shaft bearing 3 is fixed to the input shaft 1 through the input shaft bearing retaining ring 2.

[0023] See attached Figure 1 A planetary wheel needle roller bearing washer 8 is arranged inside the planetary wheel 9 , and planetary wheel washers 6 are arranged between the two sides of the planetary wheel 9 and the planet carrier 10 .

[0024] The planetary wheel needle roller bearing 7 , the planetary wheel needle roller bearing washer 8 , the planetary wheel 9 , and the planetary wheel washer 6 are all fixed on the planetary carrier 10 via the planetary wheel shaft 11 .

[0025] The input shaft assembly and the planetary carrier assembly of the utility model are connected by bearings, and the inner gear ring and the front housing are clearance-matched, thereby reducing the radial and axial clearances of the planetary carrier assembly, making the loads borne by each planetary gear more uniform, improving the load-bearing capacity, reducing noise, and improving the running stability and reliability.

Claims

1. A planetary mechanism of a transfer case, Features: The invention comprises an input shaft assembly and a planet carrier assembly, wherein the planet carrier assembly comprises a planetary wheel needle roller bearing (7), a planetary wheel (9), a planetary carrier (10) and a planetary wheel shaft (11), wherein the outer circle of the planetary carrier (10) is provided with a plurality of planetary wheel shafts (11) along the circumferential direction, and the planetary wheel (9) is rotatably arranged on the planetary wheel shaft (11) via the planetary wheel needle roller bearing (7); the input shaft assembly comprises an input shaft (1), wherein the end of the input shaft (1) is arranged in the planetary carrier (10) and connected via a planetary carrier bearing (5), the planetary carrier bearing (5) and the input shaft (1) are fixed via a planetary carrier bearing retaining ring (4), and the planetary carrier bearing (5) and the planetary carrier (10) are fixed via a planetary carrier bearing retaining ring (12).

2. The planetary mechanism of a transfer case according to claim 1, Features: The planetary gear (9) is externally meshed with an inner gear ring (13), the outer side surface of the inner gear ring (13) is provided with a rectangular spline (16), the inner side surface of the front housing (15) is provided with a rectangular groove (17), the rectangular spline (16) of the inner gear ring (13) is installed in the rectangular groove (17) of the front housing (15) with clearance fit, and the inner gear ring (13) is fixed to the front housing (15) via an inner gear ring snap ring (14).

3. A planetary mechanism of a transfer case according to claim 1 or 2, Features: The inner side surface of the planet carrier (10) is provided with a bearing position 1 (18) and a retaining ring mounting groove (19); the input shaft (1) is provided with a bearing position 2 (20) and a retaining ring mounting groove 1 (21); the inner ring of the planet carrier bearing (5) is mounted on the bearing position 2 (20); the planet carrier bearing retaining ring (4) is mounted on the retaining ring mounting groove 1 (21); the outer ring of the planet carrier bearing (5) is mounted on the bearing position 1 (18); and the planet carrier bearing retaining ring (12) is mounted in the retaining ring mounting groove (19).

4. The planetary mechanism of a transfer case according to claim 3, Features: The input shaft (1) is provided with a third bearing position (22) and a second retaining ring installation groove (23); the input shaft bearing (3) is installed on the third bearing position (22); the second retaining ring installation groove (23) is provided with an input shaft bearing retaining ring (2); the input shaft bearing (3) is fixed to the input shaft (1) via the input shaft bearing retaining ring (2).

5. The planetary mechanism of a transfer case according to claim 3, Features: A planetary wheel needle bearing washer (8) is provided inside the planetary wheel (9), and planetary wheel washers (6) are provided between the two sides of the planetary wheel (9) and the planet carrier (10).

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