Differential mechanism and vehicle

Abstract

The utility model discloses a differential mechanism and a vehicle. The differential mechanism comprises a shell, half axle gears, planet shafts and planet gears. The half axle gear is positioned in the shell; the planet shaft penetrates through the shell and is fixedly connected with the shell; the planetary gear is located in the shell and arranged on the planetary shaft in a sleeving mode, and the planetary gear is meshed with the half axle gear; the planet shaft comprises a first section and a second section which are detachably connected, one end of the first section and one end of the second section can penetrate into the inner side of the shell from the two opposite sides of the outer side of the shell and are connected with each other, and the other end of the first section and the other end of the second section can be blocked by the shell on the outer side of the shell. Therefore, a connecting force along the axial direction of the planet shaft can be formed between the first section and the second section, so that the planet shaft is fixed on the shell. According to the scheme, the pin shaft connecting mode between the planet shaft and the shell is omitted, the problem that the pin shaft is cut off in the high-speed running process of the differential mechanism is solved, and the planet shaft is more convenient to disassemble.

Description

Technical Field

[0001] The present application relates to the technical field of automobile parts, and in particular to a differential and a vehicle. Background Art

[0002] The electric drive system of a vehicle generally consists of a drive motor, a clutch, a gearbox and a differential. The function of the differential is to enable the wheels on both sides of the vehicle to travel at different speeds when the vehicle is traveling in a curve through mechanical transmission.

[0003] The differential usually includes a differential case, left and right half-shaft gears installed in the differential case, and two planetary gears. The two planetary gears are installed in the differential case through planetary shafts, and the planetary shafts are fixed in the differential case through pins.

[0004] When the vehicle is slipping on snow or requires off-road driving, the differential often has to withstand high differential speed and large torque. Since the pin is perpendicular to the planetary shaft, the pin will be subjected to shear force, causing the pin to break and the planetary shaft to fall out, causing abnormal wear or even rupture of the differential case. Utility Model Content

[0005] The present application provides a differential and a vehicle to solve the problem that when the planetary shaft of the existing differential housing is installed to the differential case through the pin shaft, the pin shaft is easily sheared due to the shear force.

[0006] In order to solve the above technical problems, the technical solution provided by this application is:

[0007] A differential comprises a housing, a half-shaft gear, a planetary shaft and a planetary gear; the half-shaft gear is located in the housing; the planetary shaft is penetrated through the housing and fixedly connected to the housing; the planetary gear is located in the housing and sleeved on the planetary shaft, and the planetary gear is meshed with the half-shaft gear; wherein the planetary shaft comprises a first section and a second section that are detachably connected, one end of the first section and one end of the second section can respectively penetrate into the inner side of the housing from opposite sides of the outer side of the housing and be connected to each other, and the other end of the first section and the other end of the second section can respectively be blocked by the housing at the outer side of the housing, so that a connecting force along the axial direction of the planetary shaft can be formed between the first section and the second section, thereby fixing the planetary shaft to the housing.

[0008] According to one embodiment of the present application, the first section includes a first connecting portion for connecting to the second section, and the second section includes a second connecting portion for connecting to the first section. The outer periphery of one of the first connecting portion and the second connecting portion is provided with an external thread, and the other is a cylindrical structure with an internal thread. The detachable connection between the first connecting portion and the second connecting portion is achieved by axial alignment of the first connecting portion and the second connecting portion and threaded matching between the external thread and the internal thread.

[0009] According to one embodiment of the present application, the number of planetary gears is at least two, each planetary gear is sleeved in one of the first section or the second section, and after the first section and the second section are connected, the connection between the first section and the second section is at least partially located on the outside of each planetary gear in the axial direction of the planetary shaft.

[0010] According to one embodiment of the present application, the first section also includes a first blocking portion opposite to the first connecting portion in its axial direction, and the second section also includes a second blocking portion opposite to the second connecting portion in its axial direction; a first planetary shaft hole and a second planetary shaft hole are opened on opposite sides of the shell for the first section and the second section to pass through respectively; after the first connecting portion of the first section passes through the shell from the first planetary shaft hole and the second connecting portion of the second section passes through the shell from the second planetary shaft hole, the planetary shaft is fixed to the shell through the first blocking portion abutting against the outer surface of the shell, the second blocking portion abutting against the outer surface of the shell, and the connection between the first connecting portion and the second connecting portion.

[0011] According to one embodiment of the present application, the first blocking portion can completely cover the first planetary shaft hole from the outside of the shell and seal against the outer surface of the shell, and / or the second blocking portion can completely cover the second planetary shaft hole from the outside of the shell and seal against the outer surface of the shell.

[0012] According to one embodiment of the present application, a first sealing ring is provided between the first blocking portion and the outer surface of the shell, and / or a second sealing ring is provided between the second blocking portion and the outer surface of the shell.

[0013] According to one embodiment of the present application, a first countersunk hole is provided on an end surface of the first blocking portion facing away from the outer surface of the shell, and / or a second countersunk hole is provided on an end surface of the second blocking portion facing away from the outer surface of the shell.

[0014] According to one embodiment of the present application, a planetary sink is provided on the end surface of the planetary gear facing the inner wall of the housing, and the planetary sink is adjacent to the gear hole of the planetary gear and is arranged around the gear hole of the planetary gear.

[0015] According to one embodiment of the present application, the differential also includes a planetary gasket, which is fixed to the inner wall of the housing and located between the inner wall of the housing and the end face of the planetary gear. The planetary gasket is sleeved outside the planetary shaft and located radially outside the planetary sinker.

[0016] The present application also provides a vehicle, comprising the above-mentioned differential.

[0017] The beneficial effects of this application are:

[0018] The differential provided by the present application and the vehicle having the differential improve the fixed connection method between the planetary shaft and the housing in the differential, and improve the entire planetary shaft into a segmented structure including a first section and a second section. The first section and the second section of the planetary shaft realize the relative fixation of the planetary shaft relative to the housing through the mutual connection between the two and the abutment with the housing. Since the traditional pin fixing method between the planetary shaft and the housing is eliminated in the present application, the situation that the traditional pin is broken by shear force and causes the planetary shaft to fall out under the harsh working conditions such as high differential and large torque of the differential is avoided. In addition, when the traditional planetary shaft is fixed by the pin, the bearing that prevents the pin from falling out needs to be removed first to disassemble the planetary shaft, and then the pin is knocked out before the planetary shaft can be disassembled. However, the planetary shaft of the present application adopts a segmented setting. When disassembling the planetary shaft, only the first section and the second section of the planetary shaft need to be disassembled to disassemble the planetary shaft, so the disassembly of the planetary shaft is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0020] Figure 1 is an embodiment of the differential provided by the present application;

[0021] Figure 2 is a schematic cross-sectional structure diagram of an embodiment of a differential provided by the present application;

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the planetary shaft in the differential provided by the present application;

[0023] Figure 4 is an axial cross-sectional view of a planetary shaft in a differential provided by the present application;

[0024] Figure 5 is an axial cross-sectional view of the split structure of the planetary shaft in the differential provided by the present application;

[0025] Figure 6 yes Figure 2 A partial enlarged view of the connection between the first section and the second section of the planetary shaft in the differential;

[0026] Figure 7 yes Figure 2 Schematic diagram of the three-dimensional structure of the planetary gear in the differential.

[0027] Description of reference numerals:

[0028] Differential 10; housing 100; half-shaft mounting hole 110; half-shaft oil guide groove 111; flange 120; half-shaft gear 200; half-shaft gasket 210; planetary gear 300; planetary countersunk table 301; gear hole 302; planetary gasket 310; planetary shaft 400; first section 410; first connecting portion 411; first blocking portion 412; first countersunk hole 4120; first sealing ring 4121; second section 420; second connecting portion 421; second blocking portion 422; second countersunk hole 4220. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0031] The function of the differential is to enable the wheels on both sides of the vehicle to travel at different speeds when the vehicle is traveling in a curve through mechanical transmission. The differential usually includes a differential case, left and right half-shaft gears installed in the differential case, and two planetary gears. The two planetary gears are installed in the differential case through planetary shafts, and the planetary shafts are fixed in the differential case through pins. Since the pins are perpendicular to the planetary shafts, when running at high speeds, the pins may be sheared off due to shear force, causing the planetary shaft to fall out.

[0032] In view of this, the present application provides a differential, which improves the fixed connection method between the planetary shaft and the housing in the differential, cancels the original pin fixing method, and improves the entire planetary shaft into a segmented structure including a first section and a second section, so as to avoid the problem that the pin is easily sheared off during the high-speed operation of the differential when a pin is used between the planetary shaft and the housing in the traditional differential. The technical solution of the present application is specifically described below through specific embodiments.

[0033] See also Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the three-dimensional structure of an embodiment of a differential provided by the present application, Figure 21 is a schematic cross-sectional structure diagram of an embodiment of a differential provided by the present application, wherein the differential 10 comprises a housing 100, a side gear 200, a planetary shaft 400 and a planetary gear 300. The side gear 200 is located in the housing 100, the planetary shaft 400 is passed through the housing 100 and is fixedly connected to the housing 100, the planetary shaft 400 serves as a supporting structure for the planetary gear 300, the planetary gear 300 is located in the housing 100 and is sleeved on the planetary shaft 400, the planetary gear 300 is rotationally connected to the planetary shaft 400, and the planetary gear 300 is meshed with the side gear 200. A hollow cavity may be provided inside the housing 100, and the side gear 200 and the planetary gear 300 are both provided in the hollow cavity.

[0034] A flange 120 coaxial with the half-shaft mounting hole 110 is disposed outside the housing 100 . A plurality of flange holes are disposed on the flange 120 , and the flange holes are used for connecting with other external devices.

[0035] Since the structures of the side gear 200 and the planetary gear 300 are well known to those skilled in the art, they will not be described in detail here. The number of the side gear 200 is at least one, usually two, to be connected to the left and right side shafts respectively. The central axis of the planetary gear 300 is perpendicular to the central axis of the side gear 200. Both the planetary gear 300 and the side gear 200 are bevel gears. The number of the planetary gear 300 is at least one, for example, it can be one, two or four. Figure 1 and Figure 2 In the embodiment shown, the number of the side gears 200 and the number of the planetary gears 300 are both two. Figure 1 and Figure 2 The illustrated structure simply describes the basic principle of the differential 10 .

[0036] The power output from the vehicle's drive motor or engine is first transmitted to the housing 100 to rotate the housing 100. The power is transmitted from the housing 100 to the left and right half shafts through the half shaft gears 200, and when the housing 100 rotates, it drives the planetary gears 300 to revolve around the rotation axis of the housing 100.

[0037] When the vehicle is traveling in a straight line, the resistances experienced by the left and right wheels are substantially the same, and the planetary gear 300 in the housing 100 revolves along with the housing 100 without generating any rotation.

[0038] When the vehicle turns, the left and right wheels travel different distances and encounter different resistances. The planetary gear 300 in the housing 100 revolves along with the housing 100 and rotates at the same time to transfer more torque to the side gear 200 on the side of the wheel with a greater travel distance. Due to the revolution of the planetary gear 300 and its own rotation, the left and right side gears 200 rotate at different speeds, allowing the vehicle to turn smoothly.

[0039] See again Figure 2 , combined with Figures 3 to 5 , Figure 3 is a schematic diagram of the three-dimensional structure of the planetary shaft 400 in the differential 10 provided in the present application, Figure 4 is an axial cross-sectional view of a planetary shaft 400 in the differential 10 provided in the present application, Figure 5 It is an axial cross-sectional view of the disassembled structure of the planetary shaft 400 in the differential 10 provided in the present application, wherein the planetary shaft 400 includes a first section 410 and a second section 420 that are detachably connected, one end of the first section 410 and one end of the second section 420 can respectively penetrate into the inner side of the housing 100 from opposite sides of the outer side of the housing 100 and be connected to each other, and the other end of the first section 410 and the other end of the second section 420 can be respectively blocked by the housing 100 on the outer side of the housing 100, so that a connecting force along the axial direction of the planetary shaft 400 can be formed between the first section 410 and the second section 420, thereby fixing the planetary shaft 400 to the housing 100.

[0040] The differential 10 provided in the present application improves the fixed connection method between the planetary shaft 400 and the housing 100 in the differential 10, and improves the structure of the traditional entire planetary shaft into a segmented structure including a first section 410 and a second section 420. The first section 410 and the second section 420 of the planetary shaft 400 are connected to each other and abutted against the housing 100 to achieve relative fixation of the planetary shaft 400 relative to the housing 100. Since the traditional pin shaft fixing method between the planetary shaft 400 and the housing 100 is eliminated in the present application, the situation in which the traditional pin shaft breaks due to shear force and causes the planetary shaft 400 to fall out under harsh working conditions such as high differential speed and high torque of the differential 10 is avoided.

[0041] Furthermore, when the traditional planetary shaft is fixed by a pin, a radial through hole is opened at one end of the planetary shaft, and the pin is inserted into the radial through hole and the positioning hole of the differential housing. Then, bearings are installed at both ends of the differential housing, and the positioning holes are covered by the end faces of the bearings to prevent the pin from extending. When the differential fails, parts need to be replaced. If the differential is to be completely disassembled, the bearings need to be removed first, and then the pins need to be knocked out before the planetary shaft can be removed and the entire differential can be disassembled. Disassembly and maintenance are more troublesome. However, the present application divides the planetary shaft 400 into sections, and when disassembling the planetary shaft 400, only the connection between the first section 410 and the second section 420 of the planetary shaft 400 needs to be disassembled, and the disassembly of the planetary shaft 400 is more convenient.

[0042] In one embodiment, the first section 410 includes a first connecting portion 411 for connecting to the second section 420, and the second section 420 includes a second connecting portion 421 for connecting to the first section 410. The outer periphery of one of the first connecting portion 411 and the second connecting portion 421 is provided with an external thread, and the other is a cylindrical structure with an internal thread. The detachable connection between the first connecting portion 411 and the second connecting portion 421 is achieved by axial alignment of the first connecting portion 411 and the second connecting portion 421 and threaded matching between the external thread and the internal thread. Figures 2 to 5 It shows that the first connection part 411 is a cylindrical structure with internal threads, and the outer periphery of the second connection part 421 is provided with external threads.

[0043] In this embodiment, the first section 410 and the second section 420 are detachably connected via a threaded connection between the first connection portion 411 and the second connection portion 421. The connection or disassembly between the first section 410 and the second section 420 can be achieved simply by screwing the first section 410 and the second section 420 to tighten or loosen the threaded connection therebetween. The disassembly and assembly is quick and labor-saving, and when the differential 10 fails, the planetary shaft 400 can be removed to further disassemble the entire differential 10 so as to replace the internal components of the differential 10. It can be understood that in other embodiments, the first section 410 and the second section 420 can also be connected by adopting other detachable connection methods between the first connecting part 411 and the second connecting part 421, such as magnetic attraction, adhesion, etc., as long as it can be ensured that after the first connecting part 411 and the second connecting part 421 are connected, a connecting force along the axial direction of the planetary shaft 400 is formed between the first section 410 and the second section 420. After the first section 410 and the second section 420 are connected to form the overall structure of the planetary shaft 400, the planetary shaft 400 serves as a supporting structure of the planetary gear 300. To ensure the stable supporting function of the planetary shaft 400, the magnetic attraction / adhesion force between the first section 410 and the second section 420 should meet a certain standard.

[0044] See again Figure 2 , combined with Figure 6 , Figure 6 yes Figure 2 A partial enlarged view of the connection between the first section 410 and the second section 420 of the planetary shaft 400 in the differential 10. In one embodiment, the number of the planetary gears 300 is at least two, and each planetary gear 300 is sleeved in one of the first section 410 or the second section 420. After the first section 410 and the second section 420 are connected, the first connecting portion 411 and the second connecting portion 421 are at least partially located on the outside of each planetary gear 300 in the axial direction of the planetary shaft 400. Figure 2The figure shows the case where each planetary gear 300 is sleeved on the second section 420. In this case, the length of the second section 420 is significantly greater than that of the first section 410. The length of the second section 420 runs through the entire radial dimension of the housing 100, while the first section 410 only runs through the thickness of the wall of the housing 100. When the first section 410 and the second section 420 are installed, the second section 420 with a longer length can be first inserted into the housing 100 from one side of the housing 100 to facilitate the docking between the first section 410 and the second section 420. In other embodiments, each planetary gear 300 can also be sleeved on the first section 410. Similarly, in these embodiments, the length of the first section 410 runs through the entire radial dimension of the housing 100, while the second section 420 only runs through the thickness of the wall of the housing 100. When the first section 410 and the second section 420 are installed, the first section 410 with a longer length can be first inserted into the housing 100 from one side of the housing 100 to facilitate the docking between the first section 410 and the second section 420.

[0045] In this embodiment, since the first connecting portion 411 and the second connecting portion 421 are at least partially located on the outer side of each planetary gear 300 in the axial direction of the planetary shaft 400, the connection between the two sections of the planetary shaft 400 will not be blocked by the planetary gear 300 and the housing 100, and the two sections of the planetary shaft 400 are easier to connect.

[0046] It should be noted that, since the first section 410 and the second section 420 of the planetary shaft 400 can be fixedly connected relative to the housing 100 as long as a detachable connection is achieved inside the housing 100, in other embodiments, the connection between the two sections of the planetary shaft 400 can be arbitrary, for example, the connection between the two sections of the planetary shaft 400 is located between the two planetary gears 300, but it can be understood that the first connecting portion 411 and the second connecting portion 421 are at least partially located on the outside of each planetary gear 300 in the axial direction of the planetary shaft 400. Since the connection between the first section 410 and the second section 420 of the planetary shaft 400 can be seen by the naked eye when the first section 410 and the second section 420 are docked, the connection operation between the first section 410 and the second section 420 of the planetary shaft 400 is easier (when the connection between the two sections of the planetary shaft 400 is located between the two planetary gears 300, the docking between the first section 410 and the second section 420 is a blind operation).

[0047] See again Figures 3 to 5In one embodiment, the first section 410 further includes a first blocking portion 412 opposite to the first connecting portion 411 in the axial direction thereof, and the second section 420 further includes a second blocking portion 422 opposite to the second connecting portion 421 in the axial direction thereof. The housing 100 is provided with a first planetary shaft hole and a second planetary shaft hole for respectively inserting the first section 410 and the second section 420. After the first connecting portion 411 of the first section 410 penetrates the housing 100 from the first planetary shaft hole and the second connecting portion 421 of the second section 420 penetrates the housing 100 from the second planetary shaft hole, the planetary shaft 400 is fixed to the housing 100 by the first blocking portion 412 abutting against the outer surface of the housing 100, the second blocking portion 422 abutting against the outer surface of the housing 100, and the connection between the first connecting portion 411 and the second connecting portion 421.

[0048] In this embodiment, after the first connecting portion 411 of the first section 410 penetrates into the housing 100 from the first planetary shaft hole and the second connecting portion 421 of the second section 420 penetrates into the housing 100 from the second planetary shaft hole, the first blocking portion 412 can abut against the outer surface of the housing 100, and the second blocking portion 422 can abut against the outer surface of the housing 100. In this embodiment, the structures of the first blocking portion 412 and the second blocking portion 422 are not specifically limited, as long as the first blocking portion 412 can abut against the area of ​​the housing 100 outside the first planetary shaft hole, and the second blocking portion 422 can abut against the housing 100 on the second planetary shaft hole. The area outside the hole can be, for example, the first blocking portion 412 can be a plate-like structure covering the first planetary shaft hole, and similarly, the second blocking portion 422 can be a plate-like structure covering the second planetary shaft hole; the first blocking portion 412 can be a rod-like structure spanning the first planetary shaft hole, and similarly, the second blocking portion 422 can be a rod-like structure spanning the second planetary shaft hole; the first blocking portion 412 can be located outside the first planetary shaft hole and abuts against the area outside the housing 100 of the first planetary shaft hole, and similarly, the first blocking portion 412 can be located outside the first planetary shaft hole and abuts against the area outside the housing 100 of the first planetary shaft hole.

[0049] In one embodiment, the first blocking portion 412 can completely cover the first planetary shaft hole from the outside of the housing 100 and seal against the outer surface of the housing 100, and / or the second blocking portion 422 can completely cover the second planetary shaft hole from the outside of the housing 100 and seal against the outer surface of the housing 100. In this embodiment, the lubricating oil inside the housing 100 can be intercepted by the first blocking portion 412 / the second blocking portion 422, effectively preventing the lubricating oil between the planetary shaft 400 and the planetary gear 300 from being thrown out from the first planetary shaft hole / the second planetary shaft hole due to the rotation of the differential 10, so that the lubricating oil is retained inside the differential 10 to continuously lubricate various components, thereby avoiding the generation of a large amount of heat when the differential 10 runs at high speed and cannot be discharged, resulting in overheating and damage to the entire system.

[0050] See again Figure 2 and Figure 6 In one embodiment, a first sealing ring 4121 is disposed between the first blocking portion 412 and the outer surface of the housing 100, and / or a second sealing ring is disposed between the second blocking portion 422 and the outer surface of the housing 100. In this embodiment, the sealing ring can enhance the sealing effect, and further effectively prevent the lubricating oil between the planetary shaft 400 and the planetary gear 300 from being thrown out from the first planetary shaft hole / the second planetary shaft hole due to the rotation of the differential 10.

[0051] In one embodiment, the end surface of the first blocking portion 412 facing away from the outer surface of the housing 100 is provided with a first countersunk hole 4120, and / or the end surface of the second blocking portion 422 facing away from the outer surface of the housing 100 is provided with a second countersunk hole 4220. The first countersunk hole 4120 and the second countersunk hole 4220 may be hexagonal countersunk holes, and the threads may be loosened by using a wrench to cooperate with the first countersunk hole 4120 on the first blocking portion 412 or the second countersunk hole 4220 on the second blocking portion 422, so that the planetary shaft 400 can be disassembled, and the differential 10 can be disassembled, which is convenient for repair and maintenance.

[0052] The lubrication structure inside the differential 10 is described in detail below.

[0053] The housing 100 is provided with a half-shaft mounting hole 110 at both opposite ends. The half-shaft of the vehicle can pass through the half-shaft mounting hole 110 and be connected to the half-shaft gear 200. The hole wall of the half-shaft mounting hole 110 is provided with a half-shaft oil guide groove 111 for guiding oil. The shape of the half-shaft oil guide groove 111 can be spiral and extend along the axial direction of the half-shaft mounting hole 110. When the housing 100 rotates, the lubricating oil can flow along the path of the half-shaft oil guide groove 111. The use of the spiral half-shaft oil guide groove 111 is more conducive to the flow of the lubricating oil, especially for the case of high speed, so that the lubricating oil can flow along the spiral direction of the half-shaft oil guide groove 111 with the rotation of the housing 100, avoiding the problem that the lubricating oil is close to the groove wall of the half-shaft oil guide groove 111 and cannot fall down for a long time due to excessively high speed and excessive centrifugal force, and the lubricating oil is difficult to fall.

[0054] The lubricating oil enters the interior of the housing 100 through the half-shaft oil guide grooves 111 in the two half-shaft mounting holes 110 to lubricate the various components inside the housing 100. In order to achieve lubrication during the relative rotation between the half-shaft gear 200 and the housing 100, a half-shaft gasket 210 is also provided on the end surface of the half-shaft gear 200 facing the inner wall of the housing 100. The lubricating oil can also enter the gap between the half-shaft gear 200 and the half-shaft gasket 210, thereby lubricating and cooling the relative rotation between the half-shaft gear 200 and the half-shaft gasket 210.

[0055] In addition, the lubricating oil inside the housing 100 can also flow through the surface of the planetary shaft 400. Under the rotation of the differential 10, the centrifugal force throws the lubricating oil to the two ends of the planetary shaft 400. Since the first blocking portion 412 and the second blocking portion 422 are respectively provided at both ends of the planetary shaft 400, the first blocking portion 412 and the second blocking portion 422 respectively cover the first planetary shaft hole and the second planetary shaft hole on the housing 100, and the lubricating oil that is about to be thrown out is intercepted by the first blocking portion 412 and the second blocking portion 422, thereby entering between the planetary gear 300 and the planetary shaft 400, and playing a lubricating and cooling role in the relative rotation between the planetary gear 300 and the planetary shaft 400. At the same time, the lubricating oil can also enter the gap between the planetary gear 300 and the housing 100, and play a lubricating and cooling role in the relative rotation between the planetary gear 300 and the housing 100, thereby reducing friction and overheating problems during high-speed operation.

[0056] In order to achieve lubrication when the planetary gear 300 and the housing 100 rotate relative to each other, a planetary gasket 310 is also sleeved on the planetary shaft 400. The planetary gasket 310 is located between the planetary gear 300 and the inner wall of the housing 100. The planetary gasket 310 is fixedly mounted on the inner wall of the housing 100, and the planetary gear 300 rotates relative to the planetary gasket 310. The planetary gasket 310 is in the shape of a partial sphere that matches the inner wall of the housing 100. The concave surface of the planetary gasket 310 fits the planetary gear 300, and the convex surface of the planetary gasket 310 fits the inner wall of the housing 100. The lubricating oil intercepted by the first blocking portion 412 / the second blocking portion 422 in the housing 100 can also enter between the planetary gear 300 and the planetary gasket 310, and play a role in lubricating and cooling the relative rotation between the planetary gear 300 and the planetary gasket 310.

[0057] Please also read Figure 6 and Figure 7 , Figure 7 yes Figure 2Schematic diagram of the three-dimensional structure of the planetary gear 300 in the differential 10. In order to make it easier for lubricating oil to enter the gap between the planetary gear 300 and the planetary shaft 400, in one embodiment, a planetary sink 301 is provided on the end surface of the planetary gear 300 facing the inner wall of the housing 100. The planetary sink 301 is adjacent to the gear hole 302 of the planetary gear 300 and is arranged around the gear hole 302 of the planetary gear 300. In this embodiment, the planetary sink 301 is provided on the planetary gear 300, and the oil intercepted by the first blocking portion 412 / the second blocking portion 422 can enter the gap between the planetary gear 300 and the planetary shaft 400 through the planetary sink 301, which plays a role in lubricating and cooling the relative rotation of the planetary gear 300 and the planetary shaft 400. To prevent the planetary gasket 310 from blocking the lubricating oil from entering the gap between the planetary gear 300 and the planetary shaft 400 from the planetary sink 301 , the planetary gasket 310 should be located radially outside the planetary sink 301 to prevent the planetary gasket 310 from blocking the planetary sink 301 .

[0058] The present application also provides a vehicle, which includes the above differential 10. The specific structure of the differential 10 refers to the above embodiment. Since the present vehicle adopts all the technical solutions of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment, which will not be described one by one here.

[0059] The terms "first", "second" and "third" in this application are only used for descriptive purposes and should not be understood as indicating the number of indicated technical features. Thus, the features defined as "first", "second" and "third" may explicitly or implicitly include at least one of the features. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions.

[0060] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A differential, characterized in that: include: case; A half-shaft gear is located in the housing; A planetary shaft, passing through the housing and fixedly connected to the housing; A planetary gear is located in the housing and sleeved on the planetary shaft, and the planetary gear is meshed with the half-shaft gear; The planetary shaft comprises a first section and a second section which are detachably connected, one end of the first section and one end of the second section can respectively penetrate into the inner side of the shell from opposite sides of the outer side of the shell and be connected to each other, and the other end of the first section and the other end of the second section can respectively be blocked by the shell at the outer side of the shell, so that a connecting force along the axial direction of the planetary shaft can be formed between the first section and the second section, thereby fixing the planetary shaft to the shell.

2. The differential according to claim 1, characterized in that: The first section includes a first connecting portion for connecting to the second section, and the second section includes a second connecting portion for connecting to the first section. The outer periphery of one of the first connecting portion and the second connecting portion is provided with an external thread, and the other is a cylindrical structure with an internal thread. The detachable connection between the first connecting portion and the second connecting portion is achieved through axial alignment of the first connecting portion and the second connecting portion and threaded matching between the external thread and the internal thread.

3. The differential according to claim 1, characterized in that: The number of the planetary gears is at least two, and each of the planetary gears is sleeved in one of the first section or the second section. After the first section and the second section are connected, the connection between the first section and the second section is at least partially located on the outside of each of the planetary gears in the axial direction of the planetary shaft.

4. The differential according to claim 2, characterized in that: The first section further includes a first blocking portion opposite to the first connecting portion in the axial direction thereof, and the second section further includes a second blocking portion opposite to the second connecting portion in the axial direction thereof; The housing is provided with a first planet shaft hole and a second planet shaft hole for respectively inserting the first section and the second section; After the first connecting portion of the first section passes through the housing from the first planetary shaft hole and the second connecting portion of the second section passes through the housing from the second planetary shaft hole, the planetary shaft is fixed to the housing through the first blocking portion abutting against the outer surface of the housing, the second blocking portion abutting against the outer surface of the housing, and the connection between the first connecting portion and the second connecting portion.

5. The differential according to claim 4, characterized in that: The first blocking portion can completely cover the first planetary shaft hole from the outside of the shell and seal against the outer surface of the shell, and / or the second blocking portion can completely cover the second planetary shaft hole from the outside of the shell and seal against the outer surface of the shell.

6. The differential according to claim 5, characterized in that: A first sealing ring is arranged between the first blocking portion and the outer surface of the shell, and / or a second sealing ring is arranged between the second blocking portion and the outer surface of the shell.

7. The differential according to claim 4 or 5, characterized in that: The end surface of the first blocking portion facing away from the outer surface of the shell is provided with a first countersunk hole, and / or the end surface of the second blocking portion facing away from the outer surface of the shell is provided with a second countersunk hole.

8. The differential according to claim 1 or 3, characterized in that: A planetary sink is provided on the end surface of the planetary gear facing the inner wall of the housing. The planetary sink is adjacent to the gear hole of the planetary gear and is arranged around the gear hole of the planetary gear.

9. The differential according to claim 8, characterized in that: The differential also includes a planetary gasket, which is fixed to the inner wall of the housing and located between the inner wall of the housing and the end surface of the planetary gear. The planetary gasket is sleeved outside the planetary shaft and located radially outside the planetary sinker.

10. A vehicle, characterized in that: Comprising a differential as claimed in any one of claims 1-9.

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