A welded structure, a differential device, and a vehicle

Abstract

This application discloses a welding structure, a differential device, and a vehicle. The welding structure includes a gear, a housing, and a sealing member. The gear has a first radial surface; the housing has a second radial surface. The first surface and the second surface are welded circumferentially, forming a slag cavity for accommodating welding slag. The gear and / or the housing are provided with an exhaust channel communicating with the slag cavity, and the sealing member can be inserted into the exhaust channel. In this way, when welding the gear and the housing, the welding fumes can flow out from the exhaust channel, thus not affecting the welding quality. After welding, the sealing member is sealed in the exhaust channel, preventing welding slag and other impurities from flowing out of the exhaust channel and causing damage to adjacent parts. In addition, the first radial surface of the gear and the second radial surface of the housing are welded together, which facilitates the welding operation. The exhaust channel can be set in the gear and / or the housing, and can be flexibly set according to actual needs.

Description

Technical Field

[0001] This application belongs to the field of vehicle technology, specifically relating to a welded structure, a differential device, and a vehicle. Background Technology

[0002] A differential is an essential device for enabling vehicles to turn smoothly. It creates a speed difference between the left and right drive wheels, thus perfectly balancing the vehicle's stability in straight-line driving and its agility when cornering. A differential typically consists of a housing and a main reduction gear, which are fixed together by welding or screwing.

[0003] In related technologies, when the housing and the main reduction gear are welded, a semi-enclosed cavity is formed between their mating surfaces to accommodate the welding slag. The air in this cavity, as well as the fumes flowing into the cavity during welding, will be heated and pressurized, affecting the welding quality. Utility Model Content

[0004] This application aims to provide a welded structure, differential device, and vehicle that at least solves the problem that during the welding of the housing and the main reduction gear, a semi-enclosed cavity is formed between their mating surfaces to accommodate welding slag. The air in this cavity, as well as the fumes flowing into the cavity during welding, are heated and pressurized, affecting the welding quality.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, embodiments of this application propose a welding structure, including: a gear having a first surface disposed in the radial direction; A housing having a second surface disposed in the radial direction, the first surface and the second surface being welded circumferentially, and a slag cavity being formed between the first surface and the second surface for containing welding slag; The gear and / or the housing are provided with an exhaust channel, which is connected to the slag chamber to discharge the gas in the slag chamber; A sealing element, which can be inserted into the exhaust channel to block the exhaust channel.

[0006] Optionally, the housing also has a shaft hole extending radially for mounting a planetary gear shaft, the shaft hole being independent of the exhaust passage.

[0007] Optionally, the second surface is provided with a second notch arranged around the circumference, and the second notch and the first surface enclose the slag cavity; The exhaust passage includes a first groove on the second surface, the first groove extending axially and communicating with the second notch.

[0008] Optionally, the exhaust passage further includes a first hole and a second hole disposed within the housing. The first hole extends radially, and the second hole extends axially. One end of the first hole communicates with the first groove, and the other end of the first hole communicates with the second hole. The sealing member is inserted into the second hole to seal the first hole.

[0009] Optionally, the second hole extends through the axial direction.

[0010] Optionally, the gear further has a third surface disposed in the axial direction, and the housing further has a fourth surface disposed in the axial direction. The third surface and the fourth surface are sealed together. An inclined surface is provided at the connection between the first surface and the third surface. A gap is formed between the inclined surface and the housing. The gap communicates with the first groove. The exhaust passage also includes a third hole provided in the gear, the third hole communicating with the gap, and the sealing member inserted into the third hole.

[0011] Optionally, the gear further has a third surface disposed in the axial direction, and the housing further has a fourth surface disposed in the axial direction, wherein the third surface and the fourth surface are in a sealing connection. The exhaust channel further includes a second groove and a fourth hole disposed in the housing. The second groove is disposed on the fourth surface. One end of the second groove is connected to the first groove, and the other end of the second groove is connected to the fourth hole. The sealing member is inserted into the fourth hole.

[0012] Optionally, the housing further has a shaft hole extending radially for mounting a planetary gear shaft; the exhaust passage includes a first groove on the second surface and a first hole and a fifth hole in the housing, the first hole extending radially, one end of the first hole communicating with the first groove, the other end of the first hole communicating with the fifth hole, and the sealing member being inserted into the fifth hole to seal the first hole; The fifth hole extends axially and communicates with the shaft hole. The welding structure also includes a fixing pin, which is inserted into the fifth hole to fix the planetary gear shaft.

[0013] Optionally, along the axial direction, the length of the sealing element is greater than the length from the opening of the fifth hole to the first hole.

[0014] Optionally, the sealing components include, but are not limited to, pins, plugs, and bolts.

[0015] Secondly, embodiments of this application provide a differential device, comprising: a welded structure as described in any of the preceding claims.

[0016] Thirdly, embodiments of this application provide a vehicle including a differential as described above.

[0017] In the embodiments of this application, the welding structure includes: a gear, a housing, and a sealing member. The gear has a first surface located in the radial direction; the housing has a second surface located in the radial direction. The first surface and the second surface are welded circumferentially, and a slag cavity is formed between the first surface and the second surface to accommodate welding slag. An exhaust channel is provided in the gear and / or the housing, and the exhaust channel communicates with the slag cavity to discharge the gas in the slag cavity. The sealing member can be inserted into the exhaust channel to block the exhaust channel. In this way, when welding the gear and the housing, the welding fumes can flow out from the exhaust channel, thus not affecting the welding quality. After welding, the sealing member is sealed in the exhaust channel to prevent welding slag and other impurities from flowing out of the exhaust channel and causing damage to adjacent parts. In addition, the first surface of the gear located in the radial direction is welded to the second surface of the housing located in the radial direction, which facilitates the welding operation. The exhaust channel can be set in the gear and / or the housing, and can be flexibly set according to actual needs.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a first overall schematic diagram of the welding structure according to an embodiment of this application; Figure 2 This is a cross-sectional view of a first welding structure according to an embodiment of this application; Figure 3 This is another cross-sectional view of the first welding structure according to an embodiment of this application; Figure 4 This is a cross-sectional view of a second welding structure according to an embodiment of this application; Figure 5 This is a cross-sectional view of a third welding structure according to an embodiment of this application; Figure 6 According to the embodiments of this application Figure 5 A magnified view of a portion of the image; Figure 7 This is a schematic diagram of a shell with a third welded structure according to an embodiment of this application; Figure 8 This is a second overall schematic diagram of the welding structure according to an embodiment of this application; Figure 9This is a cross-sectional view of a fourth welding structure according to an embodiment of this application; Figure 10 This is another cross-sectional view of the fourth welding structure according to an embodiment of this application; Figure 11 This is a schematic diagram of a gear with a fourth welding structure according to an embodiment of this application; Figure 12 This is a schematic diagram of the housing of the fourth welded structure according to an embodiment of this application.

[0020] Figure label: 1: Gear; 10: First surface; 101: First notch; 11: Third surface; 12: Inclined surface; 13: Third hole; 2: Housing; 20: Second surface; 201: Second notch; 202: First groove; 21: Shaft hole; 22: First hole; 23: Second hole; 24: Fourth surface; 241: Second groove; 25: Fourth hole; 26: Fifth hole; 3: Slag chamber; 4: Exhaust channel; 5: Sealing component; 6: Planetary gear shaft; 7: Fixing pin; M: Clearance; X: Axial; Y: Radial; Z: Circumferential. Detailed Implementation

[0021] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0023] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] Before explaining the welding structure, differential device, and vehicle provided in the embodiments of this application, the application scenarios of the welding structure, differential device, and vehicle provided in the embodiments of this application will be specifically described: In differential gears, to improve structural strength and reliability, the differential housing is usually welded together with the main reduction gear, thus forming the following power transmission: drive shaft → main reduction gear → differential housing → planetary gear shaft → planetary gear → half-shaft gear → left and right half-shafts → wheels, which creates a speed difference between the left and right wheels, enabling the vehicle to turn.

[0026] Since the main reduction gear and differential housing are typically installed with an interference fit before welding their mating surfaces, the air in the cavity between the mating surfaces, as well as the fumes generated during welding, creates high pressure inside. This pressure can easily cause defects such as porosity in the molten solder during welding, affecting the welding quality. Related technologies incorporate vent holes in the differential housing that communicate with the planetary gear shaft's bore. These vent holes connect to the cavity between the mating surfaces and also serve as pin holes for the fixing pins that secure the planetary gear shaft. By lengthening the fixing pins, the vent holes are blocked while securing the planetary gear shaft, reducing the amount of weld slag flowing out and entering the transmission system's lubricating oil, thus preventing damage to parts. However, to avoid the risk of incomplete sealing of the vent holes, the selection of fixing pins is limited, requiring only cylindrical pins or C-pins. The limited structural strength of C-pins affects the reliability of securing the planetary gear shaft.

[0027] Therefore, this application provides a welded structure, a differential device, and a vehicle. The following, in conjunction with the accompanying drawings, provides a detailed description of the welded structure, differential device, and vehicle provided in this application through specific embodiments and application scenarios.

[0028] like Figures 1 to 12 As shown, the welding structure according to some embodiments of this application includes: a gear 1, a housing 2, and a sealing member 5. The gear 1 has a first surface 10 disposed in the radial direction Y, and the housing 2 has a second surface 20 disposed in the radial direction Y. The first surface 10 and the second surface 20 are welded in the circumferential direction Z. A slag cavity 3 is formed between the first surface 10 and the second surface 20. The slag cavity 3 is used to contain welding slag. An exhaust channel 4 is provided in the gear 1 and / or the housing 2. The exhaust channel 4 communicates with the slag cavity 3 to discharge the gas in the slag cavity 3. The sealing member 5 can be inserted into the exhaust channel 4 to block the exhaust channel 4.

[0029] In this embodiment, the gear 1 is welded along the first surface 10 in the radial direction Y to the second surface 20 in the radial direction Y of the housing 2 in the circumferential direction Z. This facilitates the welding operation while ensuring the reliability of the connection between the gear 1 and the housing 2. The exhaust channel 4 provided in the gear 1 and / or housing 2 can promptly remove the fumes generated during welding and the air in the slag chamber 3, reducing the gas pressure increase in the slag chamber 3 due to heating, which can cause defects such as porosity in the molten weld, thereby improving the welding quality. After welding, the sealing member 5 is inserted into the exhaust channel 4 to seal the exhaust channel 4, reducing the flow of welding slag and other impurities from the slag chamber 3 into the transmission system lubricating oil, which could cause damage to the parts, thereby improving the safety of the welded structure.

[0030] It needs to be explained that gear 1 has axial direction X, radial direction Y, and circumferential direction Z. Radial direction Y specifically refers to the direction perpendicular to the central axis and pointing outward or inward along the radial direction; circumferential direction Z specifically refers to the direction perpendicular to the central axis and along the tangent direction of the circumference, simply put, it is the direction of "circling". This will not be elaborated further.

[0031] In practical applications, gear 1 and housing 2 are first pressed together to form a tight connection (interference fit connection). Then, the first surface 10 of gear 1 in the radial Y direction and the second surface 20 of housing 2 in the radial Y direction are welded together. In actual applications, a "bevel" is provided at the edge of the first surface 10 and the second surface 20 in the axial X direction. After the welding wire is filled into the "bevel", the first surface 10 and the second surface 20 are welded together by laser welding or the like. In order to ensure the reliability of the connection, welding is performed around the entire circumference Z direction. The operator can extend the welding device from the axial X direction to the "bevel" of the first surface 10 and the second surface 20 to perform welding without interfering with gear 1 or housing 2, which facilitates the welding operation.

[0032] like Figure 2 As shown, in practical applications, the first surface 10 has a first notch 101 near the bevel, and the second surface 20 has a second notch 201 near the bevel. The first notch 101 and the second notch 201 enclose and form a slag cavity 3, so that the slag that splashes during welding can flow into the slag cavity 3, reducing the impact of the slag on the welding quality. After the solder solidifies, it can tightly connect the gear 1 and the housing 2 together. Of course, it is also possible that only one of the first notch 101 and the second notch 201 is provided. For example, only the second notch 201 is provided, and the second notch 201 and the first surface 10 enclose and form the slag cavity 3. Those skilled in the art can set it according to actual needs, and this application does not limit it.

[0033] It should be noted that the exhaust channel 4 may be set only inside the gear 1; or it may be set only inside the housing 2; or it may be set partly inside the gear 1 and partly inside the housing 2; or it may be set independently inside both the gear 1 and the housing 2. Those skilled in the art can set it according to actual needs, and this application does not limit it.

[0034] Understandably, there can be one or more exhaust channels 4. Since the weld and slag cavity 3 formed by welding are formed around the circumference Z, when there are multiple exhaust channels 4, the multiple exhaust channels 4 are also set around the circumference Z. Correspondingly, there are also multiple sealing parts 5. Each sealing part 5 can be inserted into one exhaust channel 4, so as to seal the exhaust channel 4 after welding and reduce the outflow of welding slag and other impurities in the slag cavity 3.

[0035] It should be noted that the sealing component 5 can be a pin, plug, or bolt, as long as it can block the exhaust channel 4. Those skilled in the art can choose according to actual needs, and this application does not impose any restrictions on this. When the sealing component 5 is a pin, a C-type pin or a cylindrical pin is preferred, so as to reduce the risk of welding slag leakage.

[0036] like Figures 1 to 7 As shown, in some embodiments of this application, the housing 2 also has a shaft hole 21 extending radially Y, the shaft hole 21 for mounting the planetary gear shaft 6, and the shaft hole 21 is independent of the exhaust passage 4.

[0037] In this embodiment, by setting the exhaust channel 4 independently from the shaft hole 21 for mounting the planetary gear shaft 6, it is possible to reduce the contamination of the shaft hole 21 by impurities flowing out from the exhaust channel 4 during welding, thereby reducing the possibility of damage to the planetary gear shaft 6 during installation and improving the safety of the welded structure.

[0038] In practical applications, a shaft hole 21 is provided inside the housing 2, so that the planetary gear shaft 6 can be inserted into the shaft hole 21 and fixedly connected to the housing 2 (by a fixing pin). The power transmitted from the drive shaft to the housing 2 can be transmitted to the planetary gear shaft 6, and the planetary gear (not shown in the figure) is loosely fitted on the planetary gear shaft 6, and the planetary gear can rotate around the planetary gear shaft. When the vehicle is traveling in a straight line, the planetary gear shaft 6 drives the planetary gear, and then drives the two half-shaft gears (not shown in the figure) to rotate at the same speed. At this time, the entire differential (housing 2, planetary gear shaft 6, planetary gear and half-shaft gear) rotates as a rigid whole. When the vehicle turns, the resistance difference between the left and right wheels forces the planetary gear to rotate around the planetary gear shaft 6. The different resistances of the left and right wheels cause the two half-shaft gears to rotate at different speeds, thereby realizing the turning of the vehicle.

[0039] Understandably, such as Figure 10 As shown, since the planetary gear shaft 6 is fixed by the fixing pin 7, the housing 2 has a through hole through which the fixing pin 7 passes, and this through hole communicates with the shaft hole 21; in some embodiments of this application, the exhaust channel 4 includes a through hole through which the fixing pin 7 passes, so that the sealing member 5 can be inserted into the through hole for sealing, thereby eliminating the need for additional drilling and improving the structural strength of the housing 2; as Figures 2 to 6 As shown, the exhaust channel 4 and the shaft hole 21 can also be independent of each other, that is, the exhaust channel 4 is not connected to the shaft hole 21 (that is, it is not connected to the through hole through which the fixing pin 7 passes), so that impurities will not enter the shaft hole 21 along the exhaust channel 4 during welding, affecting the installation of the planetary gear shaft 6 or causing damage to the planetary gear shaft 6.

[0040] like Figures 2 to 12 As shown, in some embodiments of this application, the second surface 20 is provided with a second notch 201 arranged around the circumference Z, and the second notch 201 and the first surface 10 enclose to form a slag cavity 3; the exhaust channel 4 includes a first groove 202 provided on the second surface 20, the first groove 202 extends along the axial direction X and communicates with the second notch 201.

[0041] In this embodiment, the second notch 201 and the first surface 10 enclose a slag cavity 3, which can collect oxides and impurities (slag) generated during welding, reducing the inclusion of impurities into the main weld and forming slag defects. At the same time, the first groove 202 provided on the second surface 20 can communicate with the second notch 201 (i.e., the slag cavity 3), thereby forming an airflow channel along the axial direction X, which can discharge the high-pressure plasma and metal vapor generated during welding, reducing the probability of porosity inside the weld.

[0042] In specific applications, the second surface 20 is provided with a second notch 201 that surrounds the first surface 10 in the circumferential direction Z. The second notch 201 and the first surface 10 enclose a slag cavity 3, which is also formed in the circumferential direction Z. Alternatively, the first surface 10 may be provided with a first notch 101 that surrounds the first surface in the circumferential direction Z, which encloses the second surface to form a slag cavity 3. Alternatively, both the first notch 101 and the second notch 201 may be provided, which enclose the slag cavity 3. Those skilled in the art can make the configuration according to actual needs, and this application does not limit it.

[0043] Understandably, during actual processing, after the housing 2 is processed, a corresponding second notch 201 and a first groove 202 are milled on the second surface 20 of the housing 2; the first groove 202 extends along the axial direction X, so as to draw out the gas generated during welding along the axial direction X; the length of the first groove 202 along the axial direction can be determined according to actual needs, as long as it can draw out the gas generated during welding along the axial direction X.

[0044] It should be noted that, since gear 1 and housing 2 will press against each other before actual welding, the gap between the first surface 10 and the second surface 20 is limited. The first groove 202 additionally provided on the second surface 20 facilitates the exhaust of gas generated during welding. At this time, the first groove 202 serves as the "inlet" of the exhaust channel 4. In order to facilitate the insertion of the sealing member 5 into the exhaust channel 4, an "outlet" of the exhaust channel 4 will also be provided on the housing 2 or gear 1. This "outlet" can be connected to the outside, which facilitates the exhaust of gas generated during welding and the insertion of the sealing member 5.

[0045] like Figure 2 and Figure 3 As shown, in some embodiments of this application, the exhaust channel 4 further includes a first hole 22 and a second hole 23 disposed in the housing 2. The first hole 22 extends radially Y and the second hole 23 extends axially X. One end of the first hole 22 communicates with the first groove 202 and the other end of the first hole 22 communicates with the second hole 23. The sealing member 5 is inserted into the second hole 23 to seal the first hole 22.

[0046] In this embodiment, the exhaust channel 4 is located inside the housing 2. The exhaust channel 4 specifically includes a first groove 202, a first hole 22, and a second hole 23. The first groove 202 is connected to the slag chamber 3. One end of the first hole 22 is connected to the first groove 202, and the other end is connected to the second hole 23. The second hole 23 is connected to the outside, thereby forming an airflow path of slag chamber 3-first groove 202-first hole 22-second hole 23, which can discharge the gas generated during welding and the original air in the slag chamber 3. At this time, the second hole 23 serves as the "outlet" of the exhaust channel 4, which makes it easy to insert the sealing member 5 into the second hole 23 after welding to seal the first hole 22 and reduce the possibility of impurities such as welding slag flowing out.

[0047] It should be noted that the exhaust channel 4 is independent of the shaft hole 21, that is, the second hole 23 is independent of the through hole through which the fixing pin 7 passes. In other words, an additional second hole 23 is added to the housing 2, which not only reduces the possibility of impurities flowing into the shaft hole 21 through the through hole during welding, but also increases the range of options for the sealing component 5. For example, the sealing component 5 is a C-shaped pin. Since the sealing component 5 does not serve to fix the planetary gear shaft 6, there is no need to consider the problem of insufficient structural strength of the C-shaped pin.

[0048] Understandably, the first hole 22 extends radially Y to form a radially Y airflow channel, which then connects with the second hole 23. The second hole 23 extends axially X to connect with the outside and draw out the gas during welding. The second hole 23 extends axially X to allow it to be located in a non-major load-bearing part of the shell 2, ensuring structural strength and facilitating the insertion of the sealing member 5 from the axial X.

[0049] In specific applications, such as Figure 2 As shown, the second hole 23 can be a blind hole, which facilitates machining; or it can be as shown in the diagram. Figure 3 As shown, the second hole 23 is a through hole, which facilitates installation and positioning and improves the ease of operation.

[0050] like Figure 3 As shown, in some embodiments of this application, the second hole 23 is provided through the axial direction X.

[0051] In this embodiment, by providing a second hole 23 that extends through the axial direction X, it is easier to accurately position the sealing component 5 during installation, thus improving the convenience of operation.

[0052] In practical applications, the sealing component 5 is generally installed automatically by a robotic arm. The second hole 23 is set to be through along the X-axis, so that the vision system can observe the relative position of the sealing component 5 and the second hole 23 through the second hole 23. The robotic arm can then make fine adjustments based on visual feedback for precise installation. Furthermore, setting the second hole 23 as a through hole also facilitates the discharge of small metal debris or impurities during installation, preventing the sealing component 5 from failing to be installed in place.

[0053] like Figure 4 and Figure 11 As shown, in some embodiments of this application, the gear 1 further has a third surface 11 disposed in the axial direction X, and the housing 2 further has a fourth surface 24 disposed in the axial direction X. The third surface 11 and the fourth surface 24 are sealed together. An inclined surface 12 is provided at the connection between the first surface 10 and the third surface 11. A gap M is formed between the inclined surface 12 and the housing 2. The gap M communicates with the first groove 202. The exhaust channel 4 further includes a third hole 13 disposed in the gear 1. The third hole 13 communicates with the gap M. The sealing member 5 is inserted into the third hole 13.

[0054] In this embodiment, the gear 1 is sealed to the third surface 11 on the axial direction X and the housing 2 is sealed to the fourth surface 24 on the axial direction X, so that the gas generated during welding flows out only from the exhaust channel 4, reducing gas interference with the molten pool during welding and reducing the impact of gas on weld quality; the connection between the first surface 10 and the third surface 11 is located on the inclined surface 12, which facilitates the pressing of the gear 1 and the housing 2, forming a guide during pressing, and at the same time, the inclined surface 12 can form a gap M with the housing 2, the gap M is connected to the first groove 202, thereby giving the gas a larger flow space; by setting the third hole 13 in the gear 1, the following airflow path can be formed: slag chamber 3 - first groove 202 - gap M - third hole 13. At this time, the third hole 13 serves as the "outlet" of the exhaust channel 4, which can lead the gas to the outside and facilitate the insertion of the sealing member 5. At this time, the exhaust channel 4 includes: the first groove 202, the gap M and the third hole 13.

[0055] It should be noted that before the gear 1 is welded to the housing 2, they are connected together by pressing (interference fit). Due to the high surface roughness of the third surface 11 and the fourth surface 24, the third surface 11 and the fourth surface 24 can form a sealed connection after pressing.

[0056] In a specific application, the connection between the first surface 10 and the third surface 11 is provided with an inclined surface 12 (chamfer), and the connection between the second surface 20 and the fourth surface 24 of the housing 2 is provided with a rounded corner. A gap M can be formed between the inclined surface 12 and the rounded corner, and the gas flowing out from the first groove 202 can enter the gap M.

[0057] Specifically, the third hole 13 provided inside the gear 1 can communicate with the gap M, thereby cleverly utilizing the gap M to draw out the gas generated during welding; in practical applications, the gear 1 is made of a high-strength material, and setting the third hole 13 inside the gear 1 will not significantly affect the structural strength of the gear 1.

[0058] It should be noted that the third hole 13 can be specifically set with its axis at an acute angle to the radial direction Y, that is, the third hole 13 is specifically set to be "upward" inclined, so that after the gas flows into the gap M, it will naturally flow upward, making it easier for the gas to flow out; of course, the third hole 13 can also be set with its axis perpendicular to the radial direction Y, as long as it can ensure that the gas generated during welding can flow out smoothly. Those skilled in the art can set it according to actual needs, and this application does not limit it in this regard.

[0059] like Figures 5 to 7 as well as Figure 11 As shown, in some embodiments of this application, the gear 1 further has a third surface 11 disposed in the axial direction X, and the housing 2 further has a fourth surface 24 disposed in the axial direction X. The third surface 11 and the fourth surface 24 are sealed together. The exhaust channel 4 further includes a second groove 241 and a fourth hole 25 disposed in the housing 2. The second groove 241 is disposed in the fourth surface 24. One end of the second groove 241 communicates with the first groove 202, and the other end of the second groove 241 communicates with the fourth hole 25. The sealing member 5 is inserted into the fourth hole 25.

[0060] In this embodiment, one end of the second groove 241 on the fourth surface 24 is connected to the first groove 202 (the two are connected through the gap M), and the other end is connected to the fourth hole 25. Thus, the exhaust channel 4 includes the first groove 202, the second groove 241 and the fourth hole 25, forming the following airflow path: slag chamber 3 - first groove 202 - gap M - second groove 241 - fourth hole 25, thereby drawing out the gas generated during welding. The fourth hole 25 is specifically located at the part of the housing 2 that abuts against the gear 1, which facilitates processing.

[0061] In practical applications, since the gap M is naturally formed by the gear 1 being machined and installed on the housing 2, the second groove 241 is connected to the gap M, that is, the second groove 241 is connected to the first groove 202; at the same time, the third surface 11 and the fourth surface 24 are sealed together, which allows the gas to flow out smoothly from the second groove 241 and the fourth hole 25, ensuring the consistency of the gas flow.

[0062] It should be noted that, as Figure 7As shown, the fourth hole 25 is specifically located in the part of the housing 2 that abuts against the gear 1 (the part with the fourth surface 24). When the sealing member 5 is inserted into the fourth hole 25, there will be no interference, which facilitates operation. Specifically, the axis of the fourth hole 25 can be set perpendicular to the radial Y or at an acute angle. Those skilled in the art can set it according to actual needs, and this application does not limit it.

[0063] like Figures 8 to 12 As shown, in some embodiments of this application, the housing 2 also has a shaft hole 21 extending radially Y, which is used to install the planetary gear shaft 6; the exhaust channel 4 includes a first groove 202 provided on the second surface 20 and a first hole 22 and a fifth hole 26 provided in the housing 2. The first hole 22 extends radially Y, one end of the first hole 22 communicates with the first groove 202, and the other end of the first hole 22 communicates with the fifth hole 26. The sealing member 5 is inserted into the fifth hole 26 to seal the first hole 22; the fifth hole 26 extends axially X and communicates with the shaft hole 21. The welding structure also includes a fixing pin 7, which is inserted into the fifth hole 26 to fix the planetary gear shaft 6.

[0064] In this embodiment, the exhaust channel 4 includes a first groove 202, a first hole 22, and a fifth hole 26, forming the following airflow path: slag chamber 3 - first groove 202 - first hole 22 - fifth hole 26. At this time, the fifth hole 26 serves as the "outlet" of the exhaust channel 4, which can lead the gas generated during welding to the outside and facilitates the insertion of the sealing member 5. At the same time, the fifth hole 26 also serves as the insertion hole of the fixing pin 7. The fifth hole 26 is connected to the shaft hole 21, so that the fixing pin 7 can fix the planetary gear shaft 6 to the housing 2. That is, the fifth hole 26 is both the insertion hole of the sealing member 5 and the insertion hole of the fixing pin 7. Since the sealing member 5 only serves as a sealing function and does not need to fix the planetary gear shaft 6, there is no need to consider its own structural strength. It can be selected only from the perspective of sealing. There is no need to drill additional holes in the housing 2 (skillfully utilizing the insertion hole of the fixing pin 7), which facilitates the selection of the sealing member 5 and improves flexibility.

[0065] In a specific application, the fifth hole 26 extends along the axial direction X and communicates with the shaft hole 21, allowing the fixing pin 7 to be inserted to fix the planetary gear shaft 6; therefore, the first hole 22 is set to extend along the radial direction Y to communicate with the first groove 202 and the fifth hole 26, thereby forming an exhaust channel 4 for gas outflow.

[0066] It should be noted that, as Figure 10As shown, after welding is completed, the sealing component 5 is inserted into the fifth hole 26 to seal the first hole 22, thereby reducing the possibility of weld slag and other impurities flowing out; at the same time, after the planetary gear shaft 6 is inserted into the shaft hole 21, the fixing pin 7 is inserted from the other end to fix the planetary gear shaft 6, thereby fixing the planetary gear shaft 6 and the housing 2 together.

[0067] Understandably, since the sealing component 5 only serves a sealing function and the fixing pin 7 only serves a fixing function, the selection range of the sealing component 5 and the fixing pin 7 is wider, which facilitates selection and installation; for example, the sealing component 5 can be a cylindrical pin or a C-shaped pin; the fixing pin 7 can be a coiled pin, so that the fixing pin 7 has better elasticity and toughness and can better absorb the impact of the planetary gear shaft 6.

[0068] like Figure 10 As shown, in some embodiments of this application, along the axial direction X, the length of the sealing member 5 is greater than the length from the opening of the fifth hole 26 to the first hole 22.

[0069] In this embodiment, by setting the length of the sealing member 5 along the axial direction X to be greater than the length from the opening of the fifth hole 26 (the opening on the side away from the fixing pin 7) to the first hole 22, the sealing effect of the sealing member 5 on the first hole 22 is ensured, and the risk of welding slag leakage is reduced.

[0070] In practical applications, the length of the sealing member 5 along the axial direction X is the length of the sealing member 5; the length from the opening of the fifth hole 26 to the first hole 22 specifically refers to the length between the opening of the fifth hole 26 away from the fixing pin 7 and the wall of the first hole 22 closest to the fixing pin 7; the length of the sealing member 5 is greater than the length from the opening of the fifth hole 26 to the first hole 22, that is, after the sealing member 5 is inserted into the fifth hole 26, the first hole 22 should be in the middle part of the sealing member 5 along the axial direction X (at least not at the edge), so that the sealing member 5 can completely seal the first hole 22, reducing the risk of leakage of impurities such as welding slag.

[0071] like Figures 1 to 12 As shown, in some embodiments of this application, the sealing element 5 includes, but is not limited to, a pin, a plug, and a bolt.

[0072] In this embodiment of the application, by setting the sealing component 5 to at least one of the following: pin, plug, and bolt, the selection range of the sealing component 5 is increased while ensuring the sealing effect, which facilitates cost control.

[0073] In practical applications, the sealing component 5 can be a pin, such as a C-pin or a cylindrical pin; it can also be a plug, such as a cup-shaped plug or a threaded plug; or it can be a bolt; it can be automatically installed by a robotic arm, which improves installation efficiency.

[0074] Of course, the sealing component 5 can also be sealant, etc. After the fixing pin 7 is inserted into the fifth hole 26, the operator fills the fifth hole 26 with sealant, thereby sealing the first hole 22.

[0075] In some embodiments of this application, a differential device is also proposed, comprising: a welded structure as described in any of the above embodiments.

[0076] In the embodiments of this application, the differential device includes a welded structure as described in any of the above embodiments, thereby having the beneficial effects of any of the above embodiments, which will not be repeated here.

[0077] In specific applications, the differential can be any one of the following: front differential, center differential, rear differential, etc. Those skilled in the art can choose according to actual needs, and this application does not impose any restrictions on it.

[0078] In some embodiments of this application, a vehicle is also proposed, including a differential device as described in the above embodiments.

[0079] In specific applications, the vehicle can be a motor vehicle, such as a passenger car, a truck, or a derivative thereof; it can also be a special vehicle, such as a tractor, an excavator, a fire truck, or an ambulance; it can also be a water vehicle, such as an amphibious vehicle; or it can be a rail transit vehicle, such as a train, a subway, or a tram. Those skilled in the art can configure it according to actual needs, and this application does not impose any restrictions on it.

[0080] Other components of the differential device according to the embodiments of this application, such as planetary gears and half-shaft gears, are known to those skilled in the art and will not be described in detail here.

[0081] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0082] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A welded structure, characterized in that, include: Gear (1), the gear (1) having a first surface (10) disposed in the radial direction (Y); The housing (2) has a second surface (20) in the radial (Y) direction, the first surface (10) and the second surface (20) are welded in the circumferential (Z) direction, and a slag cavity (3) is formed between the first surface (10) and the second surface (20) for containing solder; The gear (1) and / or the housing (2) are provided with an exhaust channel (4), which is connected to the slag chamber (3) to discharge the gas in the slag chamber (3); A sealing element (5) is inserted into the exhaust channel (4) to block the exhaust channel (4).

2. The welded structure according to claim 1, characterized in that, The housing (2) also has a shaft hole (21) extending along the radial (Y) direction for mounting a planetary gear shaft (6), the shaft hole (21) being independent of the exhaust passage (4).

3. The welded structure according to claim 2, characterized in that, The second surface (20) is provided with a second notch (201) arranged around the circumference (Z), and the second notch (201) and the first surface (10) enclose the slag cavity (3). The exhaust passage (4) includes a first groove (202) provided on the second surface (20), the first groove (202) extending along the axial direction (X) and communicating with the second notch (201).

4. The welded structure according to claim 3, characterized in that, The exhaust channel (4) further includes a first hole (22) and a second hole (23) disposed in the housing (2). The first hole (22) extends along the radial direction (Y) and the second hole (23) extends along the axial direction (X). One end of the first hole (22) communicates with the first groove (202) and the other end of the first hole (22) communicates with the second hole (23). The sealing member (5) is inserted into the second hole (23) to seal the first hole (22).

5. The welded structure according to claim 4, characterized in that, The second hole (23) is provided through the axis (X).

6. The welded structure according to claim 3, characterized in that, The gear (1) also has a third surface (11) disposed in the axial direction (X), and the housing (2) also has a fourth surface (24) disposed in the axial direction (X). The third surface (11) and the fourth surface (24) are sealed together. An inclined surface (12) is provided at the connection between the first surface (10) and the third surface (11). A gap (M) is formed between the inclined surface (12) and the housing (2). The gap (M) communicates with the first groove (202). The exhaust passage (4) also includes a third hole (13) provided in the gear (1), the third hole (13) is connected to the gap (M), and the sealing member (5) is inserted into the third hole (13).

7. The welded structure according to claim 3, characterized in that, The gear (1) also has a third surface (11) disposed in the axial direction (X), and the housing (2) also has a fourth surface (24) disposed in the axial direction (X), wherein the third surface (11) and the fourth surface (24) are sealed together. The exhaust channel (4) further includes a second groove (241) and a fourth hole (25) disposed in the housing (2). The second groove (241) is disposed on the fourth surface (24). One end of the second groove (241) is connected to the first groove (202), and the other end of the second groove (241) is connected to the fourth hole (25). The sealing member (5) is inserted into the fourth hole (25).

8. The welded structure according to claim 1, characterized in that, The housing (2) also has a shaft hole (21) extending along the radial direction (Y), the shaft hole (21) being used to mount a planetary gear shaft (6); the exhaust channel (4) includes a first groove (202) provided on the second surface (20) and a first hole (22) and a fifth hole (26) provided in the housing (2), the first hole (22) extending along the radial direction (Y), one end of the first hole (22) communicating with the first groove (202), the other end of the first hole (22) communicating with the fifth hole (26), and the sealing member (5) being inserted into the fifth hole (26) to seal the first hole (22). The fifth hole (26) extends along the axial direction (X) and communicates with the shaft hole (21). The welding structure also includes a fixing pin (7), which is inserted into the fifth hole (26) to fix the planetary gear shaft (6).

9. The welded structure according to claim 8, characterized in that, Along the axial direction (X), the length of the sealing member (5) is greater than the length from the opening of the fifth hole (26) to the first hole (22).

10. The welded structure according to any one of claims 1-9, characterized in that, The sealing component (5) includes, but is not limited to: pins, plugs, and bolts.

11. A differential device, characterized in that, include: The welded structure as described in any one of claims 1-10.

12. A vehicle, characterized in that, include: The differential device as described in claim 11.

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