Differential integrated with high-speed-ratio speed reducer

Abstract

The utility model relates to a differential mechanism integrated with a high-speed-ratio speed reducer. The differential mechanism comprises a shell assembly, a differential mechanism planet wheel shaft assembly and a speed reducer planet wheel shaft assembly. The shell assembly comprises a left half shell and a right half shell; a differential shell and a planetary reducer shell are integrally arranged on the right half shell; a differential mechanism planet wheel shaft assembly is arranged in the differential mechanism shell, and a speed reducer planet wheel shaft assembly is arranged in the planetary speed reducer shell. A planet row speed reduction structure with a large speed ratio is integrated on the basis of a conventional differential mechanism, so that the power performance of the axle differential mechanism and the compactness of an axle structure are fully improved, and the torque transmission density and the reliability of a product are remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy commercial vehicles, and in particular to a differential with an integrated high-speed ratio reducer. Background Art

[0002] With the continuous development of new energy in the commercial vehicle market, integrated electric drive axles with advantages of lightweight and high transmission efficiency have been widely used in this field. However, with the continuous expansion of the application scope of new energy commercial vehicles, the complexity of the working conditions they face is also increasing. Therefore, under the premise of ensuring the lightweight of the integrated electric drive axle, further improving its structural compactness and power performance has become a key research issue in this field.

[0003] The difference between the conventional integrated electric drive axle differential and the traditional axle differential is that the passive gear driving its transmission is a cylindrical gear. On the one hand, in order to pursue a larger transmission ratio, the number of teeth of the passive cylindrical gear is continuously increased, resulting in a larger gear size structure, which is not conducive to improving the transmission performance of the axle; on the other hand, under the premise of meeting the compactness of the structure, in order to improve the dynamic performance of the axle, it is necessary to increase the number of gear pairs. Although the dynamic performance has been improved, the increase in the number of gear pairs has led to an increase in transmission losses, which seriously affects the transmission efficiency of the axle. Therefore, it is urgent to design an electric drive axle differential that meets the requirements of structural compactness and fully improves the dynamic performance. Utility Model Content

[0004] The purpose of the utility model is to provide a differential with an integrated high-speed ratio reducer in view of the deficiencies in the prior art, by connecting a large-speed ratio planetary gear reduction structure in series on the differential housing to solve the deficiencies of large structural size, low transmission efficiency, low torque transmission density and poor reliability of the conventional integrated electric drive axle differential.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] A differential with an integrated high-speed ratio reducer, comprising a housing assembly, a differential planetary gear shaft assembly and a reducer planetary gear shaft assembly;

[0007] The housing assembly comprises a left half housing and a right half housing; the right half housing is integrated with a differential housing and a planetary reducer housing; a differential planetary gear shaft assembly is arranged in the differential housing, and a reducer planetary gear shaft assembly is arranged in the planetary reducer housing.

[0008] Preferably, the reducer planetary gear shaft assembly includes a sun gear shaft, a planetary gear and a planetary gear shaft;

[0009] The planetary gear shaft is connected to the planetary reducer housing; the planetary gear is arranged on the planetary gear shaft and meshes with the sun gear shaft.

[0010] Preferably, it also includes a ring gear assembly component; the ring gear assembly component includes a ring gear, a ring gear bracket, a wire retaining ring, and an oil cover;

[0011] The ring gear bracket is arranged on the planetary reducer housing, and an oil cover is arranged on the ring gear bracket; the ring gear is connected to the ring gear bracket through the wire retaining ring and the spline, and is meshed with the planetary gear.

[0012] Preferably, the differential planetary gear shaft assembly comprises a cross shaft, a half-shaft gear, a half-shaft gear washer, a half-shaft planetary gear washer and a half-shaft planetary gear;

[0013] The side shaft gear and the side shaft planetary wheel are respectively provided with a side shaft gear gasket and a side shaft planetary wheel gasket; the side shaft planetary wheel is arranged on the cross shaft and meshes with the side shaft gear.

[0014] Preferably, a sliding engagement sleeve is provided on the left half shell, and a shift fork is provided on the sliding engagement sleeve.

[0015] Preferably, a speed measuring ring gear is provided on the outer peripheral side of the planetary reducer housing, an oil shield is provided at the center of the planetary reducer housing, and oil holes and radial pin holes are respectively provided at the positions of the planetary reducer housing near the oil shield.

[0016] Preferably, a first elastic cylindrical pin is radially arranged on the cross shaft, and the first elastic cylindrical pin is connected to the housing assembly.

[0017] Preferably, a second elastic cylindrical pin is radially arranged on the planetary gear shaft, and the second elastic cylindrical pin is connected to the radial pin hole.

[0018] Compared with the prior art, the utility model has the following beneficial technical effects:

[0019] The utility model integrates a large-speed-ratio planetary gear reduction structure on the basis of a conventional differential, thereby fully improving the power performance of the axle differential and the compactness of the axle structure, and significantly improving the torque transmission density and reliability of the product; at the same time, along with the improvement in power performance, the product has better applicability in working conditions, thereby fully reducing the probability of failure during the use of the product and improving product reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the differential housing structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the planetary gear shaft assembly of the reducer of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the ring gear assembly component of the utility model;

[0025] Figure 5 It is a schematic structural diagram of the differential planetary gear shaft assembly of the utility model.

[0026] Description of reference numerals:

[0027] 1. Housing assembly; 2. Differential planetary gear shaft assembly; 3. Reducer planetary gear shaft assembly; 4. Ring gear assembly assembly; 5. Sliding engagement sleeve; 6. Shift fork; 11. Left half housing; 12. Right half housing; 13. Threaded fastener; 14. Speed ​​measuring ring gear; 12-1. Differential housing; 12-2. Planetary reducer housing; 12-3. Oil hole; 12-4. Radial pin hole; 12-5. Oil shield; 21. Cross shaft; 22. Half-axle gear; 23. Half-axle gear gasket; 24. First elastic cylindrical pin; 25. Half-axle planetary gear gasket; 26. Half-axle planetary gear; 31. Sun gear shaft; 32. Planetary gear; 33. Planetary gear shaft; 34. Second elastic cylindrical pin; 41. Ring gear; 42. Ring gear bracket; 43. Wire retaining ring; 44. Oil shield. DETAILED DESCRIPTION

[0028] In order to more clearly understand the above-mentioned purposes, features and advantages of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the description of the utility model, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0029] like Figure 1-5 As shown: a differential with an integrated high-speed ratio reducer, comprising a housing assembly 1, a differential planetary gear shaft assembly 2 and a reducer planetary gear shaft assembly 3;

[0030] The housing assembly 1 comprises a left half shell 11 and a right half shell 12; preferably, the left half shell 11 and the right half shell 12 are connected by a threaded fastener 13;

[0031] The right half shell 12 is integrated with a differential housing 12-1 and a planetary reducer housing 12-2; a differential planetary gear shaft assembly 2 is arranged in the differential housing 12-1, and a high-speed ratio reducer planetary gear shaft assembly 3 is arranged in the planetary reducer housing 12-2.

[0032] The reducer planetary gear shaft assembly 3 includes a sun gear shaft 31, a planetary gear 32 and a planetary gear shaft 33;

[0033] The planetary gear shaft 33 is connected to the planetary reducer housing 12 - 2 ; the planetary gear 32 is arranged on the planetary gear shaft 33 and meshes with the sun gear shaft 31 .

[0034] The gear ring assembly 4 is also included; the gear ring assembly 4 is arranged on one side of the right half shell 12, and the gear ring assembly 4 includes a gear ring 41, a gear ring bracket 42, a wire retaining ring 43, and an oil cover 44;

[0035] The ring gear bracket 42 is arranged on the planetary reducer housing 12 - 2 , and an oil cover 44 is arranged on the ring gear bracket 42 ; the ring gear 41 is connected to the ring gear bracket 42 through a wire retaining ring 43 and a spline, and meshes with the planetary gear 32 .

[0036] The differential planetary gear shaft assembly 2 includes a cross shaft 21, a half-shaft gear 22, a half-shaft gear washer 23, a half-shaft planetary gear washer 25 and a half-shaft planetary gear 26;

[0037] A side shaft gear gasket 23 and a side shaft planetary gear gasket 25 are respectively provided on the side shaft gear 22 and the side shaft planetary gear 26 ; the side shaft planetary gear 26 is provided on the cross shaft 21 and meshes with the side shaft gear 22 .

[0038] The above power transmission is as follows: the sun gear shaft 31 is connected to the external power, and transmits the power to the planetary gear 32 for deceleration. The planetary gear 32 meshes with the ring gear 41 for transmission, and then drives the planetary reducer housing 12-2 to rotate, thereby transmitting the power to the differential housing 12-1, and finally transmitting it to the left and right wheel sides as needed through the differential planetary gear shaft assembly 2.

[0039] The left half shell 11 is provided with a sliding engagement sleeve 5, and the sliding engagement sleeve 5 is provided with a shift fork 6; the sliding engagement sleeve 5 is axially moved by the shift fork 6 to lock and release the differential.

[0040] A speed measuring ring gear 14 is arranged on the outer peripheral side of the planetary reducer housing 12-2, an oil shield 12-5 is arranged at the center of the planetary reducer housing 12-2, and oil holes 12-3 and radial pin holes 12-4 are respectively arranged near the oil shield 12-5 of the planetary reducer housing 12-2; preferably, the oil shield 12-5 is a metal stamping part, which is interference fit in the mounting hole at the center of the planetary reducer housing 12-2.

[0041] A first elastic cylindrical pin 24 is radially arranged on the cross shaft 21 , and the first elastic cylindrical pin 24 is connected to the housing assembly 1 , and is used for limiting and fixing.

[0042] A second elastic cylindrical pin 34 is radially arranged on the planetary gear shaft 33, and the second elastic cylindrical pin 34 is connected to the radial pin hole 12-4, and is used for limiting and fixing.

[0043] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0044] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A differential with an integrated high-speed ratio reducer, characterized in that: It comprises a housing assembly (1), a differential planetary gear shaft assembly (2) and a reducer planetary gear shaft assembly (3); The housing assembly (1) comprises a left half housing (11) and a right half housing (12); a differential housing (12-1) and a planetary reducer housing (12-2) are integrated on the right half housing (12); a differential planetary gear shaft assembly (2) is arranged in the differential housing (12-1), and a reducer planetary gear shaft assembly (3) is arranged in the planetary reducer housing (12-2).

2. The differential with integrated high-speed ratio reducer as claimed in claim 1, characterized in that: The reducer planetary gear shaft assembly (3) comprises a sun gear shaft (31), a planetary gear (32) and a planetary gear shaft (33); The planetary gear shaft (33) is connected to the planetary reducer housing (12-2); the planetary gear (32) is arranged on the planetary gear shaft (33) and meshes with the sun gear shaft (31).

3. The differential with integrated high-speed ratio reducer as claimed in claim 2, characterized in that: It also includes a gear ring assembly component (4); the gear ring assembly component (4) includes a gear ring (41), a gear ring bracket (42), a wire retaining ring (43), and an oil cover (44); The ring gear support (42) is arranged on the planetary reducer housing (12-2), and an oil cover (44) is arranged on the ring gear support (42); the ring gear (41) is connected to the ring gear support (42) through the wire retaining ring (43) and a spline, and is meshed with the planetary gear (32).

4. The differential with integrated high-speed ratio reducer as claimed in claim 1, characterized in that: The differential planetary gear shaft assembly (2) comprises a cross shaft (21), a half-shaft gear (22), a half-shaft gear washer (23), a half-shaft planetary gear washer (25) and a half-shaft planetary gear (26); A side shaft gear gasket (23) and a side shaft planetary gear gasket (25) are respectively provided on the side shaft gear (22) and the side shaft planetary gear (26); the side shaft planetary gear (26) is provided on the cross shaft (21) and meshes with the side shaft gear (22).

5. The differential with integrated high-speed ratio reducer as claimed in claim 1, characterized in that: The left half shell (11) is provided with a sliding engagement sleeve (5), and the sliding engagement sleeve (5) is provided with a shift fork (6).

6. The differential with integrated high-speed ratio reducer as claimed in claim 3, characterized in that: A speed measuring ring gear (14) is arranged on the outer peripheral side of the planetary reducer housing (12-2), an oil shield (12-5) is arranged at the center of the planetary reducer housing (12-2), and oil holes (12-3) and radial pin holes (12-4) are respectively arranged at positions of the planetary reducer housing (12-2) close to the oil shield (12-5).

7. The differential with integrated high-speed ratio reducer as claimed in claim 4, characterized in that: A first elastic cylindrical pin (24) is radially arranged on the cross shaft (21), and the first elastic cylindrical pin (24) is connected to the housing assembly (1).

8. The differential with integrated high-speed ratio reducer as claimed in claim 6, characterized in that: A second elastic cylindrical pin (34) is radially arranged on the planetary gear shaft (33), and the second elastic cylindrical pin (34) is connected to the radial pin hole (12-4).

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