Speed reducer, power assembly and vehicle

Abstract

The utility model provides a speed reducer, a power assembly and a vehicle. The speed reducer comprises a speed reduction structure and a differential structure. The speed reducer further comprises a first installation part and a second installation part, the first installation part is provided with a first axis, and the first installation part is configured to install the speed reduction structure. The second installation part is configured to install the differential structure, the second installation part is located on one side of the first installation part in the direction where the first axis is located, and the second installation part is connected to the first installation part; wherein the differential structure comprises a differential shaft and a differential gear set, the differential shaft is configured to be used for installing the differential gear set, and the differential shaft is clamped between the first installation piece and the second installation piece.

Description

Technical Field

[0001] The present application relates to the technical field of reducers, and in particular to a reducer, a powertrain and a vehicle. Background Art

[0002] The reducer is generally composed of a reduction structure and a differential structure. The reduction structure and the differential structure are respectively installed in two cavities of the same shell. When the shell is manufactured by sand casting and other processes, two sand cores need to be preset in the sand mold, which is not conducive to mass production of the shell and causes low production efficiency of the reducer. Utility Model Content

[0003] The present application provides a reducer, a power assembly and a vehicle to solve the problem of low production efficiency of the reducer in the prior art.

[0004] In a first aspect, the present application provides a reducer, comprising a reduction structure and a differential structure; the reducer also comprises a first mounting member and a second mounting member, the first mounting member having a first axis, and the first mounting member being configured to mount the reduction structure; the second mounting member being configured to mount the differential structure, and along the direction of the first axis, the second mounting member is located on one side of the first mounting member, and the second mounting member is connected to the first mounting member; wherein the differential structure comprises a differential shaft and a differential gear set, the differential shaft being used to mount the differential gear set, and the differential shaft being clamped between the first mounting member and the second mounting member.

[0005] In a possible implementation, the reducer further includes a fastener, the first mounting member is provided with a first connecting hole, the second mounting member is provided with a second connecting hole, and the fastener is passed through the first connecting hole and the second connecting hole to fix the second mounting member to the first mounting member.

[0006] In a possible implementation manner, a first holding groove is formed on a side of the first mounting member close to the second mounting member, and a second holding groove is formed on a side of the second mounting member close to the first mounting member;

[0007] Among them, the first clamping groove is connected to the second clamping groove and the first clamping groove and the second clamping groove together form a clamping groove, the differential shaft is at least partially accommodated in the clamping groove, and the portion of the differential shaft accommodated in the clamping groove is clamped between the first groove wall of the first clamping groove and the second groove wall of the second clamping groove.

[0008] In a possible implementation manner, the number of the differential shafts is set to at least two, and at least two of the differential shafts are integrally formed.

[0009] In a possible embodiment, the differential structure also includes a connecting member, the direction of the axis of the connecting member is parallel to the direction of the first axis, at least two differential shafts are arranged at intervals around the outer circumference of the connecting member, and one end of at least two differential shafts is connected to the outer circumference of the connecting member.

[0010] In a possible embodiment, the differential gear set includes at least two first gears and two second gears, and the first gear is rotatably provided on each of the differential shafts. Along the direction of the first axis, the two second gears are spaced apart on opposite sides of the connecting member, and the two second gears are meshed with the first gear on each differential shaft of the at least two differential shafts.

[0011] In a possible implementation, the deceleration structure includes:

[0012] A sun gear, the axis direction of which is parallel to the direction of the first axis;

[0013] A plurality of planetary gears are arranged at intervals around the outer circumference of the sun gear, and the plurality of planetary gears are all meshed with the sun gear;

[0014] A plurality of reduction shafts are provided, each of which is rotatably provided with a planetary gear, one end of the reduction shaft is connected to the first mounting member, and the other end thereof is connected to the second mounting member.

[0015] In a possible embodiment, the deceleration structure also includes a ball bearing and a cylindrical bearing. Along the direction of the first axis, the planetary gear includes a first wheel portion and a second wheel portion connected in sequence. The first wheel portion is rotatably connected to the deceleration shaft through the ball bearing, and the second wheel portion is rotatably connected to the deceleration shaft through the cylindrical bearing.

[0016] In a second aspect, the present application further provides a power assembly, including a driving member and the above-mentioned reducer, wherein the driving member is transmission-connected to the reduction structure.

[0017] In a third aspect, the present application also provides a vehicle, comprising a vehicle body and the above-mentioned power assembly, wherein the power assembly is installed on the vehicle body.

[0018] In the reducer of the present application, the first mounting member and the second mounting member can be manufactured using corresponding sand molds respectively, so that the sand molds of the first mounting member and the second mounting member can only be preset with a single sand core, thereby reducing the difficulty of production and improving the production efficiency of the reducer. In addition, when the first mounting member is connected to the second mounting member, the first mounting member and the second mounting member clamp the differential shaft of the differential structure, avoiding the use of other elements such as pins to fix the differential shaft to the second mounting member, simplifying the assembly process of the differential shaft, and further improving the production efficiency of the reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the reducer of the present application in one embodiment.

[0020] Figure 2 for Figure 1 Schematic cross-sectional view of the reducer along the Ⅱ-Ⅱ direction.

[0021] Figure 3 for Figure 1 A schematic structural diagram of the first mounting member of a middle reducer in one embodiment.

[0022] Figure 4 for Figure 1 An exploded schematic diagram of the reducer in one embodiment.

[0023] Figure 5 for Figure 1 An exploded schematic diagram of the reducer in another perspective in one embodiment.

[0024] Figure 6 for Figure 1 An exploded schematic diagram of the reduction gear structure and the differential structure of the reducer in one embodiment.

[0025] Figure 7 for Figure 2 A locally enlarged schematic diagram of the reducer corresponding to area A.

[0026] Figure 8 This is a schematic diagram of the structure of the reducer of the present application after the housing is installed in one embodiment.

[0027] Fig. 9 for Figure 8 An exploded schematic diagram of the reducer in one embodiment.

[0028] Fig.10 for Figure 8 A schematic diagram of the structure of the housing of the reducer in one embodiment.

[0029] Fig.11 It is a schematic structural diagram of a powertrain of the present application in one embodiment.

[0030] Fig.12 It is a schematic structural diagram of a vehicle of the present application in one embodiment.

[0031] Description of main component symbols:

[0032] Vehicle 300

[0033] Powertrain 200

[0034] Reducer 100

[0035] The first axis Z

[0036] First groove wall P1

[0037] Second groove wall P2

[0038] Card slot 1

[0039] First holding slot 101

[0040] Second holding slot 102

[0041] Drive 2

[0042] Car body 3

[0043] Wheel 301

[0044] Speed ​​reduction structure 10

[0045] Sun gear 11

[0046] Planetary gear 12

[0047] First wheel 121

[0048] Second wheel 122

[0049] Reduction shaft 13

[0050] Limiting slot 130

[0051] First District 131

[0052] Second District 132

[0053] Third District 133

[0054] Ball bearing 14

[0055] Column bearing 15

[0056] Input shaft 16

[0057] Through hole 160

[0058] Differential structure 20

[0059] Differential shaft 21

[0060] Differential gear set 22

[0061] First gear 221

[0062] Second gear 222

[0063] Connector 23

[0064] Output shaft 24

[0065] First mounting member 30

[0066] First mounting portion 31

[0067] First mounting hole 311

[0068] The third holding slot 312

[0069] Second mounting portion 32

[0070] First connection portion 33

[0071] Second connection portion 34

[0072] Intermediate connecting portion 35

[0073] First connection hole 351

[0074] First perforation 36

[0075] First cavity 37

[0076] Second cavity 38

[0077] Second mounting member 40

[0078] The third mounting portion 41

[0079] Second connection hole 410

[0080] Second mounting hole 42

[0081] Fourth mounting portion 43

[0082] Second perforation 44

[0083] Fastener 50

[0084] Limiter 60

[0085] Holding protrusion 61

[0086] Limiting protrusion 62

[0087] Ring gear 70

[0088] Internal teeth 71

[0089] First latch tooth 72

[0090] Housing 80

[0091] Mounting cavity 81

[0092] Second latch tooth 82

[0093] The third perforation 83

[0094] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0095] The following description will refer to the accompanying drawings to more fully describe the content of the present application. Shown in the accompanying drawings are exemplary embodiments of the present application. However, the present application can be implemented in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals represent identical or similar components.

[0096] The terms used herein are only used for the purpose of describing specific exemplary embodiments and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to also include the plural forms. In addition, when used herein, "including" and / or "comprising" and / or "having", integers, steps, operations, components and / or components, but do not exclude the existence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof.

[0097] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. In addition, unless explicitly defined herein, terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant technology and the content of this application, and will not be interpreted as an idealized or overly formal meaning.

[0098] The specific implementation methods of the present application are further described in detail below with reference to the accompanying drawings.

[0099] like Figure 1 and Figure 2 As shown, combined with Fig.12 , an embodiment of the present application provides a reducer 100, which is applied to a vehicle 300. The reducer 100 includes a reduction structure 10 and a differential structure 20. The reduction structure 10 serves as the power input end of the reducer 100, and it can reduce the speed and increase the torque of the power obtained by itself. The differential structure 20 serves as the power output end of the reducer 100, and it can receive the power increased by the reduction structure 10, and transmit the power to the wheel 301 and other structures of the vehicle 300.

[0100] In addition, when the vehicle 300 turns, the differential structure 20 can adjust the rotation speed of the two wheels 301 driven by it, so that the two wheels 301 rotate at different speeds.

[0101] The reducer 100 further includes a first mounting member 30 and a second mounting member 40. The first mounting member 30 has a first axis Z, and is configured to mount the reduction mechanism 10, and the reduction mechanism 10 can drive the first mounting member 30 to rotate around the first axis Z. The second mounting member 40 is configured to mount the differential structure 20. Along the direction of the first axis Z, the second mounting member 40 is located on one side of the first mounting member 30, and the second mounting member 40 is coaxially arranged with the first mounting member 30. The second mounting member 40 is connected to the first mounting member 30, and then the first mounting member 30 drives the second mounting member 40 to rotate synchronously around the first axis Z.

[0102] The differential structure 20 includes a differential shaft 21 and a differential gear set 22. The differential shaft 21 is used to mount the differential gear set 22. The differential shaft 21 is clamped between the first mounting member 30 and the second mounting member 40.

[0103] Thus, in the speed reducer 100 of the application, the first mounting member 30 and the second mounting member 40 are of split design, and the two can be manufactured by using corresponding sand molds respectively, so that the sand molds of the first mounting member 30 and the second mounting member 40 can be preset with only a single sand core, thereby reducing the difficulty of production and improving the production efficiency of the speed reducer 100. In addition, when the first mounting member 30 is connected to the second mounting member 40, the first mounting member 30 and the second mounting member 40 clamp the differential shaft 21 of the differential structure 20, avoiding the use of other elements such as pins to fix the differential shaft 21 to the second mounting member 40, simplifying the assembly process of the differential shaft 21, and further improving the production efficiency of the speed reducer 100.

[0104] Please combine again Figures 2 to 5 In one embodiment, the first mounting member 30 includes a first mounting portion 31 and a second mounting portion 32. Along the direction of the first axis Z, the second mounting portion 32 is integrally connected to a side of the first mounting portion 31 close to the second mounting member 40.

[0105] The first mounting portion 31 is a plate-like structure and has a first axis Z. The second mounting portion 32 is circular in shape and is coaxially disposed with the first mounting portion 31 . The outer contour of the first mounting portion 31 exceeds the outer contour of the second mounting portion 32 .

[0106] Along the direction of the first axis Z, the second mounting portion 32 is spaced apart from the first mounting portion 31, and a first cavity 37 is formed between the second mounting portion 32 and the first mounting portion 31, and the first cavity 37 at least accommodates part of the structure of the deceleration structure 10. A plurality of first connecting portions 33 are convexly provided on the surface of the first mounting portion 31 on one side close to the second mounting portion 32, and the first connecting portions 33 protrude toward the second mounting portion 32 along the direction of the first axis Z. The plurality of first connecting portions 33 are arranged at equal intervals around the first axis Z, and each first connecting portion 33 is located at the edge of the first mounting portion 31.

[0107] A plurality of second connection portions 34 are convexly provided on the surface of the second mounting portion 32 on a side away from the first mounting portion 31. The second connection portions 34 are curved and extend from one end thereof close to the second mounting portion 32 in a direction away from the first axis Z. The plurality of second connection portions 34 are arranged at equal intervals around the first axis Z, and each second connection portion 34 is located at the edge of the second mounting portion 32. In this way, when the second mounting member 40 is connected to the first mounting member 30, the plurality of second connection portions 34 cooperate with the second mounting portion 32 and the second mounting member 40 to enclose and form a second cavity 38, and the differential gear set 22 is installed in the second cavity 38.

[0108] The plurality of first connection parts 33 are disposed correspondingly to the plurality of second connection parts 34. Along the radial direction of the second mounting part 32, the first connection parts 33 are disposed at intervals on the outer sides of the corresponding second connection parts 34.

[0109] The first mounting member 30 further includes a plurality of intermediate connecting portions 35, which are arranged corresponding to the plurality of first connecting portions 33 and the plurality of second connecting portions 34. The intermediate connecting portions 35 extend along the radial direction of the second mounting portion 32 and are located between the corresponding first connecting portions 33 and the second connecting portions 34. One end of the intermediate connecting portion 35 is integrally connected to the first connecting portion 33, and the other end of the intermediate connecting portion 35 is integrally connected to the second connecting portion 34.

[0110] It is worth noting that the number of the first connection parts 33, the second connection parts 34, and the intermediate connection parts 35 is the same as the number of the differential shafts 21. In this embodiment, the number of the differential shafts 21 is three. Correspondingly, the number of the first connection parts 33, the second connection parts 34, and the intermediate connection parts 35 is also three, thereby realizing the hollow design of the first mounting member 30 and reducing the weight of the first mounting member 30.

[0111] It can be understood that in other embodiments, the number of the differential shafts 21 may also be two or other numbers.

[0112] Please combine again Figures 2 to 5 In one embodiment, a first clamping groove 101 is provided on one side of the first mounting member 30 close to the second mounting member 40, and a second clamping groove 102 is provided on one side of the second mounting member 40 close to the first mounting member 30. When the first mounting member 30 is connected to the second mounting member 40, the first clamping groove 101 is connected to the second clamping groove 102, and the first clamping groove 101 and the second clamping groove 102 together form a clamping groove 1. The differential shaft 21 is at least partially accommodated in the clamping groove 1, and the portion of the differential shaft 21 accommodated in the clamping groove 1 is clamped between the first groove wall P1 of the first clamping groove 101 and the second groove wall P2 of the second clamping groove 102, thereby achieving that the differential shaft 21 is clamped between the first mounting member 30 and the second mounting member 40.

[0113] In this embodiment, the first clamping groove 101 is formed on the surface of the middle connecting portion 35 on one side close to the second mounting member 40. The number of the first clamping grooves 101 is the same as the number of the differential shafts 21, and one first clamping groove 101 is formed on each middle connecting portion 35. The extension direction of the first clamping groove 101 is parallel to the radial direction of the second mounting portion 32, and the shape of the first clamping groove 101 is semi-cylindrical.

[0114] The shape of the second mounting member 40 is substantially the same as that of the first mounting portion 31. A third mounting portion 41 is protrudingly provided on the surface of the second mounting member 40 on the side close to the first mounting member 30, and the third mounting portion 41 protrudes toward the first mounting member 30 along the direction of the first axis Z. The second clamping grooves 102 are provided on the surface of the third mounting portion 41 on the side close to the first mounting member 30, and the number of the second clamping grooves 102 is the same as the number of the first clamping grooves 101. The extension direction of the second clamping grooves 102 is parallel to the radial direction of the second mounting portion 32, and the shape and size of the second clamping grooves 102 are the same as those of the first clamping grooves 101. The number of the third mounting portions 41 is the same as the number of the intermediate connecting portions 35, and a second clamping groove 102 is provided on each third mounting portion 41.

[0115] In particular, one end of the first clamping groove 101 and the second clamping groove 102 close to the first axis Z are both connected to the second cavity 38 , so that one end of the differential shaft 21 can pass through the clamping groove 1 and then extend into the second cavity 38 .

[0116] Please combine again Figures 2 to 5 In one embodiment, the reducer 100 further includes a fastener 50. The first mounting member 30 is provided with a first connecting hole 351, the second mounting member 40 is provided with a second connecting hole 410, and the fastener 50 is passed through the first connecting hole 351 and the second connecting hole 410. The fastener 50 is a bolt or other element, and the first connecting hole 351 and the second connecting hole 410 are both threaded holes. The fastener 50 is threadedly matched with the first connecting hole 351 and the second connecting hole 410, so as to fix the second mounting member 40 with the first mounting member 30, and make the second mounting member 40 press against the first mounting member 30, so as to ensure that the first mounting member 30 and the second mounting member 40 can clamp the differential shaft 21.

[0117] The first connection hole 351 is formed on a surface of the second mounting portion 32 close to the second mounting member 40, and the extension direction of the first connection hole 351 is parallel to the direction of the first axis Z. The second connection hole 410 is formed on a surface of the third mounting portion 41 close to the first mounting member 30, and the extension direction of the second connection hole 410 is parallel to the direction of the first axis Z.

[0118] In this embodiment, the number of the fasteners 50 is twice the number of the differential shafts 21 . Accordingly, the number of the first connecting holes 351 and the second connecting holes 410 are both twice the number of the differential shafts 21 .

[0119] Two first connection holes 351 are formed on each intermediate connection portion 35. The two first connection holes 351 are symmetrically distributed on both sides of the first clamping slot 101 with the axis of the first clamping slot 101 as a reference, and the two first connection holes 351 are spaced apart from the first clamping slot 101.

[0120] Each third mounting portion 41 is provided with two second connection holes 410. The two second connection holes 410 are symmetrically distributed on both sides of the second clamping slot 102 with the axis of the second clamping slot 102 as a reference, and the two second connection holes 410 are spaced apart from the second clamping slot 102.

[0121] In this way, a fastener 50 is provided on both sides of each differential shaft 21 to simultaneously fix the intermediate connection portion 35 and the third mounting portion 41 corresponding to the differential shaft 21, so that the third mounting portion 41 and the intermediate connection portion 35 can be pressed against each other, thereby ensuring the stability of the installation of the differential shaft 21 and preventing the differential shaft 21 from shaking. In addition, the two fasteners 50 are symmetrically distributed on both sides of the differential shaft 21, which can prevent the intermediate connection portion 35 and the third mounting portion 41 from being subjected to uneven force on both sides of the differential shaft 21, and prevent the intermediate connection portion 35 and the third mounting portion 41 from warping or cracking.

[0122] It is understandable that in other embodiments, the two first connection holes 351 formed on each intermediate connection portion 35 may also be asymmetrically arranged. The two second connection holes 410 formed on each third mounting portion 41 may also be asymmetrically arranged.

[0123] Please combine again Figures 4 to 6 , and see Figure 2 and Fig.12 In one embodiment, the number of the differential shafts 21 is set to at least two, and at least two differential shafts 21 are integrally formed. By integrally forming at least two differential shafts 21, the supporting rigidity of the differential shaft 21 for the differential gear set 22 can be improved.

[0124] The differential structure 20 also includes a connecting member 23, and the direction of the axis of the connecting member 23 is parallel to the direction of the first axis Z. At least two differential shafts 21 are arranged at equal intervals around the outer circumference of the connecting member 23, and one end of at least two differential shafts 21 extending into the second cavity 38 is integrally connected to the outer circumference of the connecting member 23, and the other end of each differential shaft 21 is clamped by the first mounting member 30 and the second mounting member 40. The installation process of the differential shaft 21 can be simplified, and each differential shaft 21 can be directly clamped between the first mounting member 30 and the second mounting member 40.

[0125] Further, the differential gear set 22 includes a first gear 221 and a second gear 222. The first gear 221 is a bevel gear, and each differential shaft 21 is rotatably provided with a first gear 221. The first gear 221 is located at one end of the differential shaft 21 extending into the second cavity 38, and along the extension direction of the differential shaft 21, the first gear 221 is spaced apart from the connecting member 23.

[0126] In this embodiment, the number of the first gears 221 is the same as the number of the differential shafts 21, which is three. Compared with the differential structure 20 using two first gears 221, this embodiment improves the load-bearing capacity of the differential structure 20 by increasing the number of the first gears 221.

[0127] The second gear 222 is a bevel gear, and there are two of them. Along the direction of the first axis Z, the two second gears 222 are arranged at intervals on opposite sides of the connecting member 23, and the two second gears 222 are meshed with the first gear 221 on each differential shaft 21 of at least two differential shafts 21. Among them, one second gear 222 is meshed with the section of each first gear 221 on the side close to the second mounting portion 32 at the same time, and the other second gear 222 is meshed with the section of each first gear 221 on the side away from the second mounting portion 32 at the same time.

[0128] The differential structure 20 further includes two output shafts 24, and the axes of the two output shafts 24 coincide with the first axis Z. The two output shafts 24 are coaxially fixed to the two second gears 222, so that the two second gears 222 drive the two output shafts 24 to rotate around the first axis Z. In this embodiment, the two output shafts 24 are respectively connected to the wheels 301, thereby driving the two wheels 301 to rotate simultaneously.

[0129] The first mounting member 30 is provided with a first through hole 36, and the second mounting member 40 is provided with a second through hole 44. The axes of the first through hole 36 and the second through hole 44 coincide with the first axis Z. The first through hole 36 extends from a side surface of the second mounting portion 32 away from the first mounting portion 31 to pass through the first mounting portion 31 and the second mounting portion 32, and the second through hole 44 extends from a side surface of the second mounting member 40 close to the first mounting member 30 to pass through the second mounting member 40. The first through hole 36 is for one output shaft 24 to pass through, and the second through hole 44 is for the other output shaft 24 to pass through.

[0130] Thus, during the rotation of the first mounting member 30 and the second mounting member 40, the first mounting member 30 and the second mounting member 40 drive each differential shaft 21 to rotate around the first axis Z, thereby causing each first gear 221 to rotate around the first axis Z. During the rotation of each first gear 221, each first gear 221 simultaneously drives the second gears 222 on both sides thereof to rotate, thereby driving the two output shafts 24 to rotate. In addition, when the vehicle 300 turns, the two wheels 301 simultaneously apply driving force to both sides of each first gear 221 through their respective corresponding second gears 222, thereby causing the first gear 221 to rotate around the axis of the differential shaft 21, thereby adjusting the rotation speed of the two wheels 301, causing the two wheels 301 to rotate at different speeds, thereby achieving the turning of the vehicle 300.

[0131] Please combine again Figures 4 to 7 , and see Figure 2 and Fig.11 In one embodiment, the reduction mechanism 10 includes an input shaft 16 , a sun gear 11 , a plurality of planetary gears 12 , and a plurality of reduction shafts 13 .

[0132] The sun gear 11 is located in the first cavity 37, and the axis of the sun gear 11 coincides with the first axis Z. The input shaft 16 is coaxially arranged with the sun gear 11. The input shaft 16 is passed through the first through hole 36, and the outer diameter of the input shaft 16 is smaller than the aperture of the first through hole 36, so that the input shaft 16 is spaced apart from the hole wall of the first through hole 36. One end of the input shaft 16 is coaxially fixed to the sun gear 11, and the other end of the input shaft 16 passes through the first through hole 36 and is transmission-connected to a driving member 2, so that the input shaft 16 is driven to rotate around the first axis Z through the driving member 2, thereby driving the sun gear 11 to rotate around the first axis Z.

[0133] In particular, the input shaft 16 is integrally connected to the sun gear 11. A through hole 160 is formed on the end surface of the input shaft 16 away from the sun gear 11. The through hole 160 passes through the input shaft 16 and the sun gear 11 along the extension direction of the input shaft 16, so that the output shaft 24 located on the side close to the first mounting member 30 can be inserted through the sun gear 11 and the input shaft 16.

[0134] The direction of the axis of the planetary gear 12 is parallel to the direction of the first axis Z. Multiple planetary gears 12 are arranged at intervals around the outer circumference of the sun gear 11, and the multiple planetary gears 12 are meshed with the sun gear 11 to drive each planetary gear 12 to rotate around its own axis through the sun gear 11. In this embodiment, the number of planetary gears 12 is three. It can be understood that in other embodiments, the number of planetary gears 12 can also be adaptively selected according to actual design requirements.

[0135] The number of the reduction shafts 13 is the same as the number of the planetary gears 12, and a planetary gear 12 is rotatably provided on each reduction shaft 13. The reduction shaft 13 is coaxially arranged with the planetary gear 12 mounted thereon, and the planetary gear 12 can rotate around the axis of the reduction shaft 13 mounted thereon. One end of the reduction shaft 13 is connected to the first mounting member 30, and the other end of the reduction shaft 13 is connected to the second mounting member 40.

[0136] In this embodiment, the first mounting portion 31 is provided with three first mounting holes 311, and the three first mounting holes 311 are arranged at equal intervals around the first axis Z. Along the direction of the first axis Z, the first mounting hole 311 penetrates the first mounting portion 31 from the surface of the first mounting portion 31 on the side away from the second mounting portion 32. One end of the reduction shaft 13 is received in the first mounting hole 311, and the outer peripheral surface of the reduction shaft 13 abuts against the inner wall of the first mounting hole 311.

[0137] In particular, the three first mounting holes 311 and the three first connecting parts 33 are staggered so that the three reduction shafts 13 and the three differential shafts 21 are staggered, and then the three planetary gears 12 and the three first gears 221 are staggered, thereby making the structure of the entire reducer 100 more compact.

[0138] The second mounting member 40 is provided with three second mounting holes 42, which are arranged at equal intervals around the first axis Z. Along the direction of the first axis Z, the second mounting hole 42 penetrates the second mounting member 40 from the surface of the second mounting member 40 on the side close to the first mounting portion 31. The other end of the reduction shaft 13 is received in the second mounting hole 42, and the outer peripheral surface of the reduction shaft 13 abuts against the inner wall of the second mounting hole 42.

[0139] In addition, the three first mounting holes 311 and the three first connecting parts 33 are staggered so that the reduction shaft 13 can pass through the avoidance space formed between two adjacent first connecting parts 33, ensuring that the end of the reduction shaft 13 away from the first mounting member 30 can be smoothly installed on the second mounting member 40.

[0140] Furthermore, the reducer 100 further includes a limiting member 60 . The limiting member 60 is clamped on a side of the first mounting portion 31 away from the second mounting portion 32 .

[0141] Specifically, the shape of the stopper 60 is roughly annular. The stopper 60 is arranged around the first axis Z, and the input shaft 16 can pass through the stopper 60. A clamping protrusion 61 is convexly provided on the surface of the stopper 60 on the side close to the first mounting portion 31. A third clamping groove 312 is provided on the surface of the first mounting portion 31 on the side close to the stopper 60. The clamping protrusion 61 is clamped in the third clamping groove 312 to limit the rotation of the stopper 60 relative to the first mounting portion 31.

[0142] There are multiple clamping protrusions 61, and the multiple clamping protrusions 61 are arranged around and spaced apart. It can be understood that the number of the clamping protrusions 61 can be three or six.

[0143] In addition, a limiting protrusion 62 is provided on the surface of the limiting member 60 near the first mounting portion 31. A limiting groove 130 is provided on the end surface of the reduction shaft 13 received in the first mounting hole 311. The limiting protrusion 62 is received in the limiting groove 130 to limit the reduction shaft 13.

[0144] Please combine again Figures 4 to 7 , and see Figure 2 In one embodiment, along the direction of the first axis Z, the planetary gear 12 includes a first wheel portion 121 and a second wheel portion 122 connected in sequence, and the second wheel portion 122 is located on a side of the first wheel portion 121 close to the second mounting member 40. The first wheel portion 121 and the second wheel portion 122 are coaxially arranged and integrally connected.

[0145] The first wheel portion 121 and the second wheel portion 122 are both rotatably mounted on the reduction shaft 13. The three first wheel portions 121 are arranged at equal intervals around the sun gear 11, and the three first wheel portions 121 are all meshed with the sun gear 11, so that the three first wheel portions 121 are simultaneously driven by the sun gear 11 to rotate around the axis of the corresponding reduction shaft 13, and then the three first wheel portions 121 drive the three second wheel portions 122 to rotate around the axis of the corresponding reduction shaft 13.

[0146] In this embodiment, the reduction mechanism 10 further includes a ball bearing 14 and a cylindrical bearing 15. The first wheel 121 is rotatably mounted on the outer circumference of the reduction shaft 13 through the ball bearing 14, and the second wheel 122 is rotatably mounted on the outer circumference of the reduction shaft 13 through the cylindrical bearing 15.

[0147] Along the extension direction of the reduction shaft 13, the reduction shaft 13 includes a first section 131, a second section 132, and a third section 133 connected in sequence. The first section 131, the second section 132, and the third section 133 are coaxially arranged and integrally connected. One end of the first section 131 away from the second section 132 is received in the first mounting hole 311, and one end of the third section 133 away from the second section 132 is received in the second mounting hole 42.

[0148] The outer diameter of the first section 131 is larger than that of the second section 132 , and the outer diameter of the second section 132 is larger than that of the third section 133 . The ball bearing 14 is mounted on the outer circumference of the first section 131 , and the cylindrical bearing 15 is mounted on the outer circumference of the third section 133 .

[0149] In this way, the ball bearing 14 and the cylindrical bearing 15 are simultaneously arranged on the reduction shaft 13, so that the ball bearing 14 bears more axial force of the planetary gear, thereby making the helix angle of the gear teeth of the second wheel portion 122 larger, thereby optimizing the design of the end face overlap of the planetary gear 12 and improving the NVH (Noise, Vibration, Harshness) level of the reduction structure 10.

[0150] Please combine again Figures 8 to 10 In one embodiment, the reducer 100 further includes a ring gear 70 and a housing 80 .

[0151] The housing 80 is a substantially hemispherical structure, and the axis of the housing 80 coincides with the first axis Z. An installation cavity 81 is provided at one end of the housing 80 along the direction of the first axis Z. The first installation member 30 and the second installation member 40 are both located in the installation cavity 81 .

[0152] A fourth mounting portion 43 is convexly disposed on the surface of the second mounting member 40 on a side away from the first mounting member 30. The fourth mounting portion 43 is cylindrical in shape, and the axis of the fourth mounting portion 43 coincides with the first axis Z. The second through hole 44 passes through the fourth mounting portion 43, so that the output shaft 24 located on the side close to the second mounting member 40 can pass through the fourth mounting portion 43.

[0153] The other end of the housing 80 is provided with a third through hole 83 along the first axis Z. The third through hole 83 is connected to the mounting cavity 81. The fourth mounting portion 43 is rotatably mounted in the third through hole 83, so that the second mounting member 40 can rotate around the first axis Z relative to the housing 80.

[0154] The gear ring 70 is in the shape of a ring, and the inner circumference of the gear ring 70 is provided with internal teeth 71. The gear ring 70 is arranged around the three second wheel portions 122, and the internal teeth 71 are meshed with the three second wheel portions 122. The outer circumference of the gear ring 70 is fixed to the inner wall of the housing 80 so that the gear ring 70 does not rotate relative to the housing 80, and then when the three second wheel portions 122 rotate around their respective axes, the three second wheel portions 122 can rotate relative to the gear ring 70 around the first axis Z, thereby realizing the rotation of the first mounting member 30 and the second mounting member 40 around the first axis Z relative to the housing 80.

[0155] In this embodiment, the outer circumference of the gear ring 70 is provided with a plurality of first latch teeth 72 arranged at intervals, and the inner circumference of the housing 80 is provided with a plurality of second latch teeth 82 arranged at intervals. The plurality of first latch teeth 72 and the plurality of second latch teeth 82 are arranged alternately, so that each first latch tooth 72 is clamped between two adjacent second latch teeth 82, thereby fixing the gear ring 70 and the housing 80.

[0156] like Fig.11 As shown, the embodiment of the present application further provides a power assembly 200 , including a driving member 2 and the above-mentioned reducer 100 . The driving member 2 is transmission-connected to the reduction mechanism 10 .

[0157] Specifically, the driving member 2 is transmission-connected to the input shaft 16 to drive the input shaft 16 to rotate around the first axis Z. The driving member 2 may be a device such as an electric motor or an engine that can provide mechanical energy.

[0158] like Fig.12 See Fig.11 The embodiment of the present application also provides a vehicle 300, including a vehicle body 3 and the above-mentioned powertrain 200. The vehicle 300 can be a new energy vehicle or a fuel vehicle. The powertrain 200 is installed on the vehicle body 3, and a wheel 301 is installed on the vehicle body 3, so that the powertrain 200 provides a driving force to the wheel 301 to rotate the wheel 301. The powertrain 200 can synchronously drive the two front wheels or the two rear wheels of the vehicle 300 to rotate, so as to realize front-wheel drive or rear-wheel drive.

[0159] In the above, the specific embodiments of the present application are described with reference to the accompanying drawings. However, those skilled in the art will appreciate that various changes and substitutions may be made to the specific embodiments of the present application without departing from the scope of the present application. These changes and substitutions are all within the scope defined by the present application.

Claims

1. A speed reducer, comprising a speed reduction structure (10) and a differential structure (20); characterized in that: The reducer (100) further includes: a first mounting member (30) having a first axis (Z), wherein the first mounting member (30) is configured to mount the deceleration structure (10); A second mounting member (40) is configured to mount the differential structure (20), and the second mounting member (40) is located on one side of the first mounting member (30) along the direction of the first axis (Z), and the second mounting member (40) is connected to the first mounting member (30); The differential structure (20) comprises a differential shaft (21) and a differential gear set (22); the differential shaft (21) is configured to mount the differential gear set (22); and the differential shaft (21) is clamped between the first mounting member (30) and the second mounting member (40).

2. The reducer according to claim 1, characterized in that: The reducer (100) further comprises a fastener (50); the first mounting member (30) is provided with a first connecting hole (351); the second mounting member (40) is provided with a second connecting hole (410); the fastener (50) is passed through the first connecting hole (351) and the second connecting hole (410) and is used to fix the second mounting member (40) to the first mounting member (30).

3. The reducer according to claim 1, characterized in that: A first clamping groove (101) is provided on a side of the first mounting member (30) close to the second mounting member (40), and a second clamping groove (102) is provided on a side of the second mounting member (40) close to the first mounting member (30); The first clamping groove (101) is connected to the second clamping groove (102), and the first clamping groove (101) and the second clamping groove (102) together form a clamping groove (1), the differential shaft (21) is at least partially accommodated in the clamping groove (1), and the portion of the differential shaft (21) accommodated in the clamping groove (1) is clamped between a first groove wall (P1) of the first clamping groove (101) and a second groove wall (P2) of the second clamping groove (102).

4. The reducer according to claim 1, characterized in that: The number of the differential shafts (21) is set to be at least two, and at least two of the differential shafts (21) are integrally formed.

5. The reducer according to claim 4, characterized in that: The differential structure (20) further comprises a connecting member (23), wherein the direction of the axis of the connecting member (23) is parallel to the direction of the first axis (Z), at least two differential shafts (21) are arranged at intervals around the outer peripheral surface of the connecting member (23), and one end of at least two differential shafts (21) is connected to the outer peripheral surface of the connecting member (23).

6. The reducer according to claim 5, characterized in that: The differential gear set (22) comprises at least two first gears (221) and two second gears (222), each of the differential shafts (21) being rotatably provided with the first gear (221), and along the direction of the first axis (Z), the two second gears (222) being spaced apart on opposite sides of the connecting member (23), and the two second gears (222) being meshed with the first gear (221) on each of the differential shafts (21) of the at least two differential shafts (21).

7. The reducer according to claim 1, characterized in that: The deceleration structure (10) comprises: A sun gear (11), the axis of which is parallel to the direction of the first axis (Z); A plurality of planetary gears (12) are arranged at intervals around the outer peripheral surface of the sun gear (11), and the plurality of planetary gears (12) are all meshed with the sun gear (11); A plurality of reduction shafts (13), each of which is rotatably provided with a planetary gear (12), one end of the reduction shaft (13) is connected to the first mounting member (30), and the other end is connected to the second mounting member (40).

8. The reducer according to claim 7, characterized in that: The deceleration structure (10) further comprises a ball bearing (14) and a column bearing (15); along the direction of the first axis (Z), the planetary gear (12) comprises a first wheel portion (121) and a second wheel portion (122) which are connected in sequence; the first wheel portion (121) is rotatably connected to the deceleration shaft (13) via the ball bearing (14); and the second wheel portion (122) is rotatably connected to the deceleration shaft (13) via the column bearing (15).

9. A powertrain, characterized in that: It comprises a driving member (2) and a reducer according to any one of claims 1 to 8, wherein the driving member (2) is drivingly connected to the reduction structure (10).

10. A vehicle, characterized in that: It comprises a vehicle body (3) and a power assembly as claimed in claim 9, wherein the power assembly (200) is installed on the vehicle body (3).

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