Differential mechanism structure

Abstract

The utility model discloses a differential mechanism structure which comprises a differential mechanism pin shaft assembly and a planet carrier, the differential mechanism pin shaft assembly comprises a differential mechanism pin shaft, a gasket, a planet gear and a half axle gear, a containing cavity is formed in the planet carrier and used for containing the differential mechanism pin shaft assembly, the differential mechanism pin shaft assembly can be installed on the planet carrier in the axial direction. Therefore, the mounting direction of the differential mechanism pin shaft is changed from the radial direction to the axial direction, the overall axial length of the planet carrier is not limited by the axial distance from the planet carrier supporting wall to the pin shaft hole any more, and the axial length of a planet mechanism assembly can be shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a differential structure. Background Art

[0002] At present, coaxial planetary reducers usually adopt a traditional differential structure or a lightweight differential structure. For a planetary mechanism assembly adopting a traditional differential structure, there is a phenomenon that the Y-direction space of the planetary reduction mechanism is large due to the large Y-direction space of the differential.

[0003] The common NW type reduction mechanism on the market usually adopts a layout of 3 double teeth. In order to minimize the envelope size of the NW configuration reducer, 4 planetary gears are usually used to improve the load-bearing capacity of the differential. The combination of 3 double teeth and 4 differential planetary gears has the problem that the axial locating surface of the double teeth affects the assembly of the differential pin shaft, and the Y-direction space of the planetary mechanism assembly needs to be increased to ensure the installation of the pin shaft.

[0004] The traditional multi-planetary differential pin system usually includes multiple planetary shafts, multiple planetary shaft limit pins, and connectors, with many types and quantities of parts. Utility Model Content

[0005] The main purpose of the utility model is to provide a differential structure, aiming to provide a differential structure which can shorten the axial length of the planetary mechanism assembly.

[0006] In order to achieve the above-mentioned purpose, the differential structure proposed by the utility model includes:

[0007] In the technical solution provided by the utility model, a differential structure is provided, wherein the differential structure includes a differential pin assembly and a planetary carrier, wherein the differential pin assembly includes a differential pin, a gasket, a planetary gear and a half-axle gear, and a receiving cavity is provided in the planetary carrier to accommodate the differential pin assembly, wherein the differential pin assembly can be axially mounted on the planetary carrier. The differential pin, the gasket, the planetary gear and the half-axle gear are all necessary structures in the differential, wherein the differential pin is used to support the components of the planetary gear, which allows the planetary gear to rotate freely on the shaft, and the planetary gear is the core component of the differential, which is located in the planetary carrier body and connected to the differential pin. The planetary gear realizes the differential function by meshing with the half-axle gear. The half-axle gear is connected to the wheel shaft of the car, and its rotation drives the wheel to rotate. The meshing relationship between the half-axle gear and the planetary gear allows the left and right wheels to rotate at different speeds. The gasket is used to adjust the gap between the planetary gear and the half-shaft gear to ensure normal meshing and transmission between them. The utility model improves the structure of the differential pin shaft, the planetary carrier and other components, so that the differential pin shaft can be installed in the planetary carrier from the axial direction, and then the axial length of the planetary carrier as a whole is no longer limited by the axial distance from the planetary carrier support wall to the pin shaft hole, and the axial length of the planetary mechanism assembly can be shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0009] Figure 1 An assembly diagram of an embodiment of a differential structure provided by the utility model;

[0010] Figure 2 for Figure 1 Exploded diagram of

[0011] Figure 3 It is a cross-sectional schematic diagram when the differential pin shaft has a square shape;

[0012] Figure 4 is a cross-sectional schematic diagram when the differential pin shaft has a circular shape;

[0013] Figure 5 for Figure 1 Schematic diagram of the three-dimensional structure of the middle planet carrier;

[0014] Figure 6for Figure 1 Schematic diagram of the force diagram of the center differential flange;

[0015] Figure 7 for Figure 1 A schematic diagram of the three-dimensional structure of the center differential pin shaft;

[0016] Figure 8 Schematic diagram of the structure of some differentiated parts.

[0017] Description of Figure Numbers:

[0018]

[0019]

[0020] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the capacity of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0024] At present, coaxial planetary reducers usually adopt a traditional differential structure or a lightweight differential structure. For a planetary mechanism assembly adopting a traditional differential structure, there is a phenomenon that the Y-direction space of the planetary reduction mechanism is large due to the large Y-direction space of the differential.

[0025] The common NW type reduction mechanism on the market usually adopts a layout of 3 double teeth. In order to minimize the envelope size of the NW configuration reducer, 4 planetary gears 3 are usually used to improve the load-bearing capacity of the differential. The combination of 3 double teeth and 4 differential planetary gears has the problem that the axial positioning surface of the double teeth affects the assembly of the differential pin 4, and the Y-direction space of the planetary mechanism assembly needs to be increased to ensure the installation of the pin.

[0026] The conventional multi-planet differential pin 4 system usually includes multiple planetary shafts, multiple planetary shaft limit pins, connectors, and has many types and quantities of parts.

[0027] In view of this, the utility model provides a differential structure. Figures 1 to 5 The embodiment of the differential structure provided by the utility model is as follows: Figure 1 An assembly diagram of an embodiment of a differential structure provided by the utility model; Figure 2 for Figure 1 Exploded diagram of Figure 3 It is a cross-sectional schematic diagram when the differential pin shaft 4 has a square shape; Figure 4 It is a cross-sectional schematic diagram when the differential pin shaft 4 has a circular shape; Figure 5 for Figure 1 Schematic diagram of the three-dimensional structure of the middle planet carrier; Figure 6 for Figure 1 A schematic diagram of the force structure of the center differential flange 24;

[0028] Figure 7 for Figure 1 A schematic diagram of the three-dimensional structure of the center differential pin 4; Figure 8 Schematic diagram of the structure of some differentiated parts.

[0029] See also Figure 1 , is a schematic diagram of an embodiment of the utility model, providing a differential structure 100, the differential structure 100 includes a differential pin assembly and a planet carrier 1, the differential pin assembly includes a differential pin 4, a gasket, a planetary gear 3 and a half-shaft gear, the planet carrier 1 is provided with an accommodating cavity for accommodating the differential pin assembly, wherein the differential pin assembly can be axially mounted on the planet carrier 1.

[0030] In the technical solution provided by the utility model, a differential structure 100 is provided, wherein the differential structure 100 includes a differential pin assembly and a planet carrier 1, wherein the differential pin assembly includes a differential pin 4, a gasket, a planetary gear 3 and a half-axle gear, and a receiving cavity is provided in the planet carrier 1 to accommodate the differential pin assembly, wherein the differential pin assembly can be axially mounted on the planet carrier 1. The differential pin 4, the gasket, the planetary gear 3 and the half-axle gear are all necessary structures in the differential, wherein the differential pin 4 is used to support the components of the planetary gear 3, which allows the planetary gear 3 to rotate freely on the shaft, and the planetary gear 3 is the core component of the differential, which is located in the planet carrier 1 and connected to the differential pin 4. The planetary gear 3 realizes the differential function by meshing with the half-axle gear. The half-axle gear is connected to the wheel shaft of the car, and its rotation drives the wheel to rotate. The meshing relationship between the half-shaft gear and the planetary gear 3 enables the left and right wheels to rotate at different speeds. The gasket is used to adjust the gap between the planetary gear 3 and the half-shaft gear to ensure normal meshing and transmission between them. The utility model improves the structure of the differential pin 4, the planetary carrier 1 and other components, so that the differential pin 4 can be installed axially into the planetary carrier 1, and then the overall axial length of the planetary carrier 1 is no longer limited by the axial distance from the support wall of the planetary carrier 1 to the pin hole, which can shorten the axial length of the planetary mechanism assembly.

[0031] In this embodiment, the differential pin 4 adopts an integrated molding process, and the integrated molding technology can integrate multiple processes into one operation, thereby greatly shortening the production cycle and improving production efficiency. The integrated molding process can avoid the steps of processing multiple parts and assembling them in traditional processing, reducing production costs. In the integrated molding process, heating and cooling treatments help to improve the hardness and strength of the material, thereby improving the service life and quality of the product. The integrated molding technology can achieve high-precision and high-quality product production, reduce product defect rates, and improve product reliability and stability. It adopts a production method without wastewater, waste gas, and waste residue, reduces pollution emissions, and meets environmental protection requirements. The integrated molding technology can flexibly produce products of different types and specifications, improve the flexibility and diversity of production, and adopt automated equipment and process control systems. Automatic detection and automatic adjustment during the production process can ensure the stability and reliability of production.

[0032] Furthermore, the differential pin 4 includes a plurality of support arms 41 extending in the radial direction, and the planetary gears 3 and the washers are both rotatably sleeved on the support arms 41. The support arms 41 are evenly arranged in the circumferential direction and are used to carry the planetary gears 3.

[0033] In this embodiment, the planet carrier 1 includes a first support plate 12, a second support plate 11 and a third support plate 13, wherein the second support plate 11 is fixedly connected to the first support plate 12 on one axial side, and the third support plate 13 is fixedly connected to the first support plate 12 on the other axial side, and a receiving cavity 14 is formed between the first support plate 12 and the third support plate 13; the differential structure 100 also includes a differential flange, which is mounted on the third support plate 13; wherein the second support plate 11, the first support plate 12, the third support plate 13 and the differential flange are coaxially arranged in sequence along the axial direction. wherein the receiving cavity 14 is used to accommodate the differential pin assembly, and the differential flange is used to connect the differential with other components or systems to ensure a tight connection and fixed position between them. The flange tightly connects the differential with other components through fasteners such as bolts to form a stable connection structure to prevent the differential from loosening or falling off during operation, and not only plays a connecting role, but also is responsible for transmitting torque. When the vehicle is running, the power generated by the engine is transmitted to the differential through the transmission shaft, and the differential then transmits the torque to the wheels through the flange, thereby driving the vehicle forward or backward. The design of the differential flange usually has the function of balance and stability. It can keep the differential balanced during operation, reduce the generation of vibration and noise, and improve the driving stability and comfort of the vehicle.

[0034] Furthermore, the differential flange is detachably connected to the third support plate 13; and / or the first support plate 12 is detachably connected to the third support plate 13; and / or the first support plate 12 is detachably connected to the second support plate 11. Such a configuration makes it more convenient to disassemble and assemble various components.

[0035] A spherical boss 17 is formed inside the first support plate 12 along the circumferential direction. The spherical boss 17 is formed with a mounting groove along the circumferential direction. The mounting groove is used to mount the support arm 41 of the differential pin 4 .

[0036] Furthermore, the differential flange includes a limiting step 21 extending in the axial direction, corresponding to the differential pin 4, and the limiting step 21 is evenly provided with limiting grooves along the circumference direction, and the limiting grooves are used to limit the axial displacement of the differential pin 4. The axial displacement of the differential pin 4 is limited by setting the limiting step 21.

[0037] In addition, in order to enable the planetary gear 3 to be mounted on the planetary gear 3, the number of teeth of the planetary gear 3 is limited to an even number.

[0038] In addition, in order to separate the planetary carrier 1 from the planetary gear 3 and avoid direct friction between the end faces during rotation, thereby preventing abnormal wear and failure, helping to maintain smooth transmission between gears, reducing heat and noise generation, and maintaining the smoothness of the contact surface, thereby improving the efficiency of gear transmission. The gasket includes a first gasket 6 and a second gasket 5, the first gasket 6 is fitted with the planetary gear 3 inside, and the second gasket 5 is an arc-shaped structure outside, which is adapted to the spherical boss 17 and the limiting groove, and is fitted with the first gasket 6 inside.

[0039] Furthermore, the centers of the first gasket 6 and the second gasket 5 both include a round hole or a square hole, and the corresponding shape of the differential pin 4 can be set to be round or square. The shape of the differential pin 4 is not limited.

[0040] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A differential structure, characterized in that: include: The differential pin assembly includes a differential pin, a washer, a planetary gear and a half-shaft gear; A planet carrier, wherein a receiving cavity is provided in the planet carrier for receiving the differential pin assembly; Wherein, the differential pin assembly can be axially mounted on the planet carrier.

2. The differential structure according to claim 1, characterized in that: The differential pin is integrally formed.

3. The differential structure according to claim 1, characterized in that: The differential pin shaft comprises a plurality of support arms extending in the radial direction, and the planetary gear and the gasket are both rotatably sleeved on the support arms.

4. The differential structure according to claim 3, characterized in that: The planet carrier comprises a first support plate, a second support plate and a third support plate, wherein the second support plate is fixedly connected to the first support plate at one axial side, the third support plate is fixedly connected to the first support plate at the other axial side, and an accommodating cavity is formed between the first support plate and the third support plate; The differential structure also includes a differential flange mounted on the third support plate; The second support plate, the first support plate, the third support plate and the differential flange are coaxially arranged in sequence along the axial direction.

5. The differential structure according to claim 4, characterized in that: The differential flange is detachably connected to the third support plate; and / or, The first support plate is detachably connected to the third support plate; and / or, The first supporting plate is detachably connected to the second supporting plate.

6. The differential structure according to claim 4, characterized in that: A spherical boss is provided inside the first support plate along the circumferential direction, and a mounting groove is provided on the spherical boss along the circumferential direction for mounting the support arm of the differential pin shaft.

7. The differential structure according to claim 6, characterized in that: The differential flange includes a limiting step extending in the axial direction, corresponding to the differential pin shaft, and the limiting step is evenly provided with limiting grooves along the circumference direction, and the limiting grooves are used to limit the axial displacement of the differential pin shaft.

8. The differential structure according to claim 1, characterized in that: The number of teeth of the planetary gear is an even number.

9. The differential structure according to claim 7, characterized in that: The gasket comprises: a first gasket, the interior of which is in contact with the planetary gear; The second gasket has an arc-shaped structure on the outside, is adapted to the spherical boss and the limiting groove, and is fitted with the first gasket on the inside.

10. The differential structure according to claim 9, characterized in that: The centers of the first gasket and the second gasket both include a round hole or a square hole, and the corresponding shape of the differential pin can be set to be round or square.

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