Differential mechanism shell, differential mechanism and vehicle

Abstract

The invention discloses a differential shell, a differential and a vehicle, the differential shell comprises a shell body, the shell body is provided with a first mounting hole and a second mounting hole, the first mounting hole and the second mounting hole are suitable for a gear shaft to penetrate through, and the first mounting hole and / or the second mounting hole are / is provided with a plurality of hole sections which communicate with one another; the hole diameters of the multiple hole sections are gradually reduced in the axial direction of the gear shaft in the direction away from the inner side of the shell body, and a step part is formed between every two adjacent hole sections.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicles, and particularly relates to a differential housing, a differential and a vehicle. Background Art

[0002] In new energy vehicles, the differential needs to withstand a large torque impact. After the planetary gear shaft of the differential in the related art breaks, there is a risk that the shaft body will be thrown out, which not only damages the differential itself, but also may cause safety accidents. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to some extent. For this purpose, an embodiment of the present invention provides a differential housing, which can reduce or avoid the risk of the broken gear shaft being thrown out.

[0004] An embodiment of the present invention further provides a differential.

[0005] An embodiment of the present invention further provides a vehicle.

[0006] The differential housing according to the embodiment of the present invention includes: a housing main body, on which there are a first mounting hole and a second mounting hole, the first mounting hole and the second mounting hole are adapted for a gear shaft to pass through therein, the first mounting hole and / or the second mounting hole have a plurality of hole segments communicating with each other, the diameters of the plurality of hole segments gradually decrease in the axial direction of the gear shaft along the direction away from the inner side of the housing main body, and a step portion is formed between two adjacent hole segments.

[0007] The differential housing according to the embodiment of the present invention is provided with the first mounting hole and the second mounting hole, which facilitates the insertion of the gear shaft into the housing main body. At least one of the first mounting hole or the second mounting hole includes a plurality of hole segments and a step portion is formed between two adjacent hole segments. The end of the gear shaft abuts against the step portion. When the gear shaft breaks, due to the blocking of the step portion, the risk of the broken gear shaft being thrown out can be reduced or avoided, ensuring the safe use of the differential, and not damaging the differential housing or other components, reducing or avoiding potential safety hazards.

[0008] In some embodiments, the diameter of one of the plurality of hole segments adjacent to the inner side of the housing main body gradually decreases in the direction away from the inner side of the housing main body.

[0009] In some embodiments, the housing main body further has a first positioning hole, the first positioning hole communicates with the first mounting hole or the second mounting hole, and the first positioning hole extends in the radial direction of the gear shaft. The first positioning hole is for a positioning pin to pass through therein to position the gear shaft in the housing main body.

[0010] In some embodiments, in the direction in which the gear shaft penetrates, the first mounting hole is located upstream of the second mounting hole. The second mounting hole has a plurality of hole segments that communicate with each other. The diameters of the plurality of hole segments gradually decrease in the axial direction of the gear shaft along the direction away from the inner side of the housing body, and a stepped portion is formed between two adjacent hole segments.

[0011] In some embodiments, the housing body further has a mounting portion for fixing the housing body to the vehicle frame.

[0012] The differential of the embodiment of the present invention includes: a housing, the housing being the differential housing described in any one of the above embodiments; a gear shaft, the gear shaft sequentially passing through the first mounting hole and the second mounting hole, and one end of the gear shaft abutting against the stepped portion.

[0013] In some embodiments, the differential further includes a bearing. The gear shaft has a positioning portion, the diameter of the positioning portion is smaller than the diameter of other positions of the gear shaft, the bearing is sleeved on the gear shaft, and the bearing is located at the positioning portion.

[0014] In some embodiments, one end of the gear shaft has a second positioning hole, the second positioning hole communicates with the first mounting hole or the second mounting hole, and the second positioning hole is for a positioning pin to be inserted therein to position the gear shaft in the housing.

[0015] In some embodiments, the second positioning hole communicates with the first mounting hole, and the differential further includes a positioning pin. The positioning pin sequentially passes through the first positioning hole on the housing and the second positioning hole to position the gear shaft in the housing.

[0016] The vehicle of the embodiment of the present invention includes the differential described in any one of the above embodiments. Description of the Drawings

[0017] Figure 1 is a cross-sectional view of the differential of the embodiment of the present invention and does not include the gear shaft and the planetary gear.

[0018] Figure 2 is a cross-sectional view of the differential of the embodiment of the present invention from another angle and includes the gear shaft and the planetary gear.

[0019] Reference Signs:

[0020] Housing 100,

[0021] Housing body 1, first mounting hole 11, second mounting hole 12, stepped portion 121, mounting portion 13, first positioning hole 14,

[0022] Gear shaft 2, second positioning hole 21, positioning portion 22,

[0023] Bearing 3, locating pin 4, planetary gear 5. Specific embodiments

[0024] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0025] As Figure 1 and Figure 2 shown, the differential housing 100 of the embodiment of the present invention includes a housing main body 1. The housing main body 1 has a first mounting hole 11 and a second mounting hole 12. The first mounting hole 11 and the second mounting hole 12 are adapted for a gear shaft 2 to pass through therein. The first mounting hole 11 and / or the second mounting hole 12 has a plurality of hole segments that communicate with each other. The diameters of the plurality of hole segments gradually decrease in the axial direction of the gear shaft 2 along the direction away from the inner side of the housing main body 1, and a stepped portion 121 is formed between two adjacent hole segments.

[0026] Specifically, as Figure 1 and Figure 2 shown, the first mounting hole 11 and the second mounting hole 12 extend in the up and down direction, and the first mounting hole 11 and the second mounting hole 12 are coaxially arranged.

[0027] The first mounting hole 11 includes a plurality of hole segments that communicate with each other, and the inner diameters of the plurality of hole segments gradually increase from top to bottom. A stepped portion 121 is formed between two adjacent hole segments.

[0028] The second mounting hole 12 includes a plurality of segments that communicate with each other, and the inner diameters of the plurality of hole segments gradually decrease from top to bottom. A stepped portion 121 is formed between two adjacent hole segments.

[0029] Alternatively, both the first mounting hole 11 and the second mounting hole 12 include a plurality of hole segments, and the inner diameter of the hole segments in the first mounting hole 11 gradually increases from top to bottom, and the inner diameter of the hole segments in the second mounting hole 12 gradually decreases from top to bottom.

[0030] By providing the first mounting hole 11 and the second mounting hole 12 in the differential housing 100 of the embodiment of the present invention, it is convenient to insert the gear shaft 2 into the housing main body 1. At least one of the first mounting hole 11 or the second mounting hole 12 includes a plurality of hole segments and a stepped portion 121 is formed between two adjacent hole segments. The end of the gear shaft 2 abuts against the stepped portion 121. When the gear shaft 2 breaks, due to the blocking of the stepped portion 121, the risk of the broken gear shaft 2 being thrown out can be reduced or avoided, ensuring the safe use of the differential and preventing damage to the differential housing or other components, reducing or avoiding potential safety hazards.

[0031] In some embodiments, the aperture diameter of a hole segment adjacent to the inner side of the housing body 1 among the plurality of hole segments gradually decreases in a direction away from the inner side of the housing body 1.

[0032] Specifically, as Figure 1 and Figure 2 shown, when there are a plurality of mutually communicating hole segments in the first mounting hole 11, the inner diameter of the lowermost hole segment gradually increases from top to bottom. When there are a plurality of mutually communicating hole segments in the second mounting hole 12, the inner diameter of the uppermost hole segment gradually increases from bottom to top. Increasing the aperture diameter of the hole segment close to the inner side of the housing body 1 in a direction close to the housing body 1 can improve the space utilization rate inside the housing body 1, thereby facilitating the assembly of the planetary gear 5 and other components.

[0033] In some embodiments, the housing body 1 further has a first positioning hole 14. The first positioning hole 14 communicates with the first mounting hole 11 or the second mounting hole 12, and the first positioning hole 14 extends radially along the gear shaft 2. The first positioning hole 14 is for a positioning pin 4 to be inserted therein to position the gear shaft 2 inside the housing body 1.

[0034] Specifically, when the first positioning hole 14 is located on the upper side of the housing body 1, the first positioning hole 14 communicates with the first mounting hole 11. When the first positioning hole 14 is located on the lower side of the housing body 1, the first positioning hole 14 communicates with the second mounting hole 12. The first positioning hole 14 extends in the left - right direction, and the aperture diameter of the first positioning hole 14 is smaller than the aperture diameters of the first mounting hole 11 and the second mounting hole 12. By providing the first positioning hole 14, it is convenient to insert the positioning pin 4 into the housing body 1, and the gear shaft 2 can be positioned inside the housing body 1 by using the positioning pin 4.

[0035] In some embodiments, in the direction in which the gear shaft 2 penetrates, the first mounting hole 11 is located upstream of the second mounting hole 12. The second mounting hole 12 has a plurality of mutually communicating hole segments, and the aperture diameters of the plurality of hole segments gradually decrease in a direction away from the inner side of the housing body 1 along the axial direction of the gear shaft 2, and a stepped portion 121 is formed between two adjacent hole segments.

[0036] Specifically, as Figure 1 and Figure 2 shown, when the gear shaft 2 penetrates the housing body 1 from top to bottom, the first mounting hole 11 is located above the second mounting hole 12. Conversely, when the gear shaft 2 penetrates the housing body 1 from bottom to top, the first mounting hole 11 is located below the second mounting hole 12.

[0037] Taking the case where the first mounting hole 11 is located above the second mounting hole 12 as an example, the second mounting hole 12 has a plurality of interconnected hole segments, and the diameters of the plurality of hole segments gradually decrease from top to bottom. A step portion 121 is formed between two adjacent hole segments. And the first positioning hole 14 communicates with the first mounting hole 11. In other words, the first positioning hole 14 and the mounting hole with a plurality of hole segments are arranged opposite to each other in the up-down direction. That is, when the first mounting hole 11 communicates with the first positioning hole 14, the second mounting hole 12 has a plurality of hole segments. The first positioning hole 14 communicates with the first mounting hole 11, and the second mounting hole 12 segment has a plurality of interconnected hole segments. After the gear shaft 2 is inserted into the housing body 1, the positioning pin 4 in the first positioning hole 14 and the step portion 121 in the second mounting hole 12 are used to position and fix both ends of the gear shaft 2. This can not only improve the assembly accuracy of the gear shaft 2, but also, due to the limiting effect of the positioning pin 4 and the step portion 121 on the gear shaft 2, prevent the gear shaft 2 from being thrown out after fracture.

[0038] In some embodiments, the housing body 1 further has a mounting portion 13, and the mounting portion 13 is used to fix the housing body 1 on the vehicle frame.

[0039] Specifically, as Figure 1 and Figure 2 shown, the mounting portion 13 surrounds the outside of the housing body 1, and the mounting portion 13 is integrally formed with the housing body 1, which can improve the structural strength of the mounting portion 13, and the mounting portion 13 is convenient for fixing the housing 100 on the vehicle frame or other components.

[0040] The differential of the embodiment of the present invention includes a housing 100 and a gear shaft 2. The housing 100 is the differential housing 100 of any one of the above embodiments. The gear shaft 2 sequentially passes through the first mounting hole 11 and the second mounting hole 12, and one end of the gear shaft 2 abuts against the step portion 121.

[0041] Specifically, as Figure 2 shown, the gear shaft 2 is inserted into the housing 100, the gear shaft 2 extends in the up-down direction, the planetary gear 5 is sleeved outside the gear shaft 2, and the housing 100 has a receiving cavity, and the planetary gear 5 is arranged in the receiving cavity. It should be noted that the planetary gear 5 is rotatable relative to the housing 100.

[0042] The gear shaft 2 sequentially passes through the first mounting hole 11 and the second mounting hole 12 from top to bottom, and the lower end of the gear shaft 2 abuts against the step portion 121 in the second mounting hole 12.

[0043] In some embodiments, the differential further includes a bearing 3. The gear shaft 2 has a positioning portion 22, and the diameter of the positioning portion 22 is smaller than the diameter of other positions of the gear shaft 2. The bearing 3 is sleeved on the gear shaft 2, and the bearing 3 is located at the positioning portion 22.

[0044] Specifically, asFigure 2 As shown in the figure, there are two positioning portions 22 provided on the gear shaft 2. The two positioning portions 22 are arranged at intervals in the axial direction of the gear shaft 2. The bearing 3 is sleeved on the gear shaft 2, and the bearing 3 is located at the positioning portion 22.

[0045] The diameter of the positioning portion 22 is smaller than the diameter of other positions of the gear shaft 2. By providing the positioning portion 22 on the gear shaft 2 and the diameter of the positioning portion 22 being smaller than the diameter of other positions of the gear shaft 2, axial positioning can be provided for the bearing 3, thereby improving the assembly accuracy of the bearing 3.

[0046] In some embodiments, one end of the gear shaft 2 has a second positioning hole 21. The second positioning hole 21 communicates with the first mounting hole 11 or the second mounting hole 12. The second positioning hole 21 is for a positioning pin 4 to pass through its interior to position the gear shaft 2 within the housing 100.

[0047] Specifically, the position of the second positioning hole 21 corresponds to the position of the first positioning hole 14. That is, when the first positioning hole 14 communicates with the first mounting hole 11, the second positioning hole 21 is located on the side of the gear shaft 2 adjacent to the first mounting hole 11. Or, when the first positioning hole 14 communicates with the second mounting hole 12, the second positioning hole 21 is located on the side of the gear shaft 2 adjacent to the second mounting hole 12.

[0048] Taking the first positioning hole 14 communicating with the first mounting hole 11 as an example, the second positioning hole 21 is located at the upper end of the gear shaft 2, and the first positioning hole 14 and the second positioning hole 21 communicate with each other. The second positioning hole 21 extends in the left - right direction. By providing the second positioning hole 21 on the gear shaft 2 and the second positioning hole 21 communicating with the first positioning hole 14, the assembly accuracy between the gear shaft 2 and the housing 100 is ensured.

[0049] In some embodiments, the second positioning hole 21 communicates with the first mounting hole 11. The differential further includes a positioning pin 4. The positioning pin 4 sequentially passes through the first positioning hole 14 and the second positioning hole 21 on the housing 100 to position the gear shaft 2 within the housing 100.

[0050] Specifically, as Figure 2 shown, the positioning pin 4 extends in the left - right direction. The positioning pin 4 sequentially passes through the first positioning hole 14 and the second positioning hole 21 from right to left, realizing the positioning and fixing of the upper end of the gear shaft 2.

[0051] The vehicle of the embodiment of the present invention includes a differential as described in any one of the above embodiments.

[0052] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0053] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0054] In the present invention, unless otherwise clearly specified and defined, the terms such as "mounted", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher level than the second feature in terms of horizontal height. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature in terms of horizontal height.

[0056] In the present invention, terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0057] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A differential housing, characterized in that, Comprising: A housing body, on which there are a first mounting hole and a second mounting hole, the first mounting hole and the second mounting hole being adapted for a gear shaft to pass through therein, the first mounting hole and / or the second mounting hole having a plurality of hole segments communicating with each other, the diameters of the plurality of hole segments gradually decreasing in the axial direction of the gear shaft along the direction away from the inner side of the housing body, and a stepped portion being formed between two adjacent hole segments.

2. The differential housing according to claim 1, characterized in that, The diameter of one of the plurality of hole segments adjacent to the inner side of the housing body gradually decreases in the direction away from the inner side of the housing body.

3. The differential housing according to claim 2, characterized in that, The housing body further has a first positioning hole, the first positioning hole communicating with the first mounting hole or the second mounting hole, and the first positioning hole extending in the radial direction of the gear shaft, the first positioning hole being for a positioning pin to pass through therein to position the gear shaft within the housing body.

4. The differential housing according to claim 3, characterized in that, In the direction in which the gear shaft penetrates, the first mounting hole is located upstream of the second mounting hole, the second mounting hole having a plurality of hole segments communicating with each other, the diameters of the plurality of hole segments gradually decreasing in the axial direction of the gear shaft along the direction away from the inner side of the housing body, and a stepped portion being formed between two adjacent hole segments.

5. The differential housing according to any one of claims 1-4, characterized in that, The housing body further has a mounting portion for fixing the housing body to the vehicle frame.

6. A differential, characterized in that, Comprising: A housing, the housing being the differential housing according to any one of claims 1-5; A gear shaft, the gear shaft passing through the first mounting hole and the second mounting hole in sequence, and one end of the gear shaft abutting against the stepped portion.

7. The differential according to claim 6, characterized in that, It further includes a bearing, the gear shaft having a positioning portion, the diameter of the positioning portion being smaller than the diameters of other positions of the gear shaft, the bearing being sleeved on the gear shaft, and the bearing being located at the positioning portion.

8. The differential according to claim 6 or 7, characterized in that, One end of the gear shaft has a second positioning hole, the second positioning hole communicating with the first mounting hole or the second mounting hole, the second positioning hole being for a positioning pin to pass through therein to position the gear shaft within the housing.

9. The differential according to claim 8, wherein The second positioning hole communicates with the first mounting hole, and the differential further includes a positioning pin, the positioning pin passing through the first positioning hole and the second positioning hole on the housing in sequence to position the gear shaft within the housing.

10. A vehicle, characterized in that, Comprising the differential according to any one of claims 6-9.

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