A transmission sub-transmission planetary array

Abstract

The application discloses a transmission sub-gearbox planetary gear set and belongs to the technical field of transmissions. The transmission sub-gearbox planetary gear set comprises a planetary gear set and a rear cover shell. The planetary gear set comprises a planetary carrier assembly, a sun gear, planetary gears and a planetary gear ring. The planetary carrier assembly is composed of a front planetary carrier and a rear planetary carrier which are fixedly connected. The front planetary carrier is supported on a second shaft through bearings. The rear planetary carrier is supported on the rear cover shell through bearings. The sun gear is uniformly meshed with a plurality of planetary gears which are supported on a planetary gear shaft through bearings. The plurality of planetary gears are meshed with the inner teeth of the planetary gear ring. The problems of large deflection of the planetary carrier, bending and torsional deformation of the planetary gear shaft and meshing load deviation of the planetary gears caused by the cantilevered planetary carrier are effectively solved. In the application, a thrust ring is connected to the second shaft through splines and is used for contacting the front end of the planetary gear to axially limit the planetary gear. A bearing assembly or a thrust washer is sleeved on the planetary gear shaft and is used for contacting the rear end of the planetary gear to axially limit the planetary gear.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of transmission, and relates to a transmission auxiliary box planetary gear set assembly. BACKGROUND

[0002] At present, the AMT product adopting the auxiliary box planetary gear set technical scheme has a cantilever single support structure, that is, the planet carrier is only supported at the rear end by a bearing, and the front end of the planet carrier is not supported. This supporting mode can cause large planet carrier deflection, planet wheel shaft bending and torsional deformation, and planet wheel meshing load deviation. In addition, in the prior art, metal or non-metal spacers are arranged on both sides of the planet wheel to limit the axial direction of the planet wheel. However, during the working process of the planetary gear set, the planet wheel spacer is prone to wear, thereby reducing the transmission efficiency and the oil cleanliness. SUMMARY

[0003] The present application aims to solve the technical problems of large planet carrier deflection, planet wheel shaft bending and torsional deformation, planet wheel meshing load deviation, and planet wheel spacer wear in the AMT adopting the auxiliary box helical planetary gear set technical scheme, and provides a transmission auxiliary box planetary gear set assembly.

[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0005] A transmission auxiliary box planetary gear set assembly, comprising a planetary gear set, a rear cover shell and a second shaft; the rear cover shell is connected with a transmission shell; the planetary gear set comprises a planet carrier assembly, a sun gear, a planet wheel, a planet gear ring and a planet wheel shaft;

[0006] The planet carrier assembly is composed of a front planet carrier and a rear planet carrier which are fixedly connected; the front planet carrier is supported on the second shaft through a bearing; the rear planet carrier is supported on the rear cover shell through a bearing; the rear planet carrier and the output shaft are in an integrated structure and are used for power output; the sun gear and the second shaft are in an integrated shaft tooth structure and are supported on the transmission shell through a bearing; the front end of the planet wheel shaft is supported on the front planet carrier, and the rear end of the planet wheel shaft is supported on the rear planet carrier; the sun gear is uniformly meshed with a plurality of planet wheels supported on the planet wheel shaft through a bearing in the circumferential direction; and the plurality of planet wheels are all meshed with the inner teeth of the planet gear ring;

[0007] A thrust ring is connected to the sun gear through a spline, and is used for contacting the front end of the planet wheel to limit the axial direction of the planet wheel; a bearing assembly or a thrust washer is sleeved on the planet wheel shaft, and is used for contacting the rear end of the planet wheel to limit the axial direction of the planet wheel.

[0008] Further improvements of the present application are as follows:

[0009] The contact surface of the thrust ring and the planet wheel is two non-coaxial matching conical surfaces; the bearing assembly is composed of a check ring, a planet carrier needle bearing and a gasket; the check ring is in contact with the rear end surface of the planet needle bearing and is sleeved on the planet wheel shaft; the gasket is in contact with the rear planet carrier; the planet carrier needle bearing is sleeved on the check ring and is located between the planet wheel and the gasket.

[0010] The taper of the matching conical surface is 3°.

[0011] The synchronizer assembly also includes a low gear ring coupling plate, a synchronizer friction ring and a synchronizer high gear cone disc assembly.

[0012] The planet gear ring is provided with a planet row external spline; the synchronizer friction ring is sleeved on the planet row external spline of the planet gear ring; the planet row external spline is provided with a check ring ring groove; the check ring ring groove is installed with a synchronizer check ring; the planet row external spline is provided with a yoke groove for installing a sub-gearbox yoke to perform a gear shifting action; the low gear ring coupling plate is fixedly connected to the rear cover shell and is used for contacting the synchronizer friction ring conical surface to synchronize the rotating speed when the gear is hung backward; the synchronizer high gear cone disc assembly is connected to the outer spline of the front planet carrier of the planet carrier assembly through the inner spline, and is used for contacting the synchronizer friction ring conical surface to synchronize the rotating speed when the gear is hung forward.

[0013] The oil passage structure comprises a housing oil passage, a sun gear oil passage, a planet carrier assembly oil passage, a planet wheel shaft oil passage and a connecting oil pipe; the transmission housing is matched with a two-axle rear bearing cover; the two-axle rear bearing cover is provided with an oil distribution ring with an oil passage at a contact position of the two-axle rear bearing cover and the sun gear; the housing oil passage comprises a first housing oil passage arranged on the transmission housing and a second housing oil passage arranged on the two-axle rear bearing cover; the first housing oil passage and the second housing oil passage are communicated; the sun gear oil passage comprises a sun gear first oil passage located in a radial direction of the sun gear, a sun gear second oil passage located in an axial direction of the sun gear and a sun gear third oil passage located in the radial direction of the sun gear, which are sequentially communicated; the second housing oil passage is communicated with the sun gear first oil passage through the oil passage on the oil distribution ring; the sun gear third oil passage is used for spraying and lubricating the contact surface of the thrust ring and the planet wheel; the planet carrier assembly oil passage comprises a planet carrier assembly second oil passage, a planet carrier assembly fourth oil passage, a planet carrier assembly third oil passage and a planet carrier assembly first oil passage, which are sequentially communicated; the number of the fourth oil passage, the third oil passage and the first oil passage is the same as the number of the planet wheel; the planet carrier assembly second oil passage is communicated with the sun gear second oil passage through the connecting oil pipe; the end of the planet carrier assembly third oil passage is provided with a hollow oil plug, and the hollow oil plug is provided with a central small hole, which is used for spraying and lubricating the meshing area of the sun gear and the planet wheel; the end of the planet carrier assembly fourth oil passage located at the output shaft bearing is provided with a plurality of hollow oil plugs, which are used for spraying and lubricating the output shaft bearing; the end of the planet carrier assembly fourth oil passage located at other positions is provided with a solid oil plug for sealing; the planet wheel shaft oil passage comprises an annular oil groove, a first radial oil passage, a central oil passage and a second radial oil passage, which are sequentially communicated; the annular oil groove is communicated with the planet carrier assembly first oil passage; the end of the central oil passage is provided with a bowl-shaped plug for sealing.

[0014] The connecting oil pipe is provided with a small hole in the radial direction, and the oil liquid can be sprayed to the bearing assembly.

[0015] The rear side of the planet carrier is provided with a planet carrier assembly step hole coaxial with the planet carrier assembly first oil passage; the planet wheel shaft is provided with a blind hole coaxial with the planet carrier assembly step hole and having the same hole diameter; the circumferential rotation and axial movement of the planet wheel shaft are limited by the elastic pin or bolt sequentially penetrating the planet carrier assembly step hole and the blind hole.

[0016] The planet carrier assembly step hole is provided with a large hole section with a hole diameter larger than that of the blind hole at the entrance of the planet carrier assembly step hole, so that the elastic pin or bolt is convenient to disassemble.

[0017] The rear side of the planet carrier is connected with a retarder driven gear, so that the integration of the retarder function is realized.

[0018] The sun gear is uniformly meshed with five planet wheels in the circumferential direction.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] The application discloses a transmission sub-gearbox planetary gear set assembly, a planetary carrier assembly is composed of front and rear planetary carriers fixedly connected, the planetary carrier assembly is supported by bearings in front and rear, and the problems of large deflection of the planetary carrier, bending and torsional deformation of a planetary gear shaft, and meshing load deviation of a planetary gear can be effectively solved, the axial dimension is short, the number of parts is small, and the cost is low; and a thrust ring is connected to the sun gear through a spline, is used for contacting the front end of the planetary gear to axially limit the planetary gear; a bearing assembly or a thrust washer is sleeved on the planetary gear shaft, is used for contacting the rear end of the planetary gear to axially limit the planetary gear, and reduces the speed difference of adjacent parts and abrasion.

[0021] Further, the contact surfaces of the thrust ring and the planetary gear are conical surfaces matched with each other, the conical surface angle is 3°, the non-coaxial conical surface contact is linear contact, can effectively reduce abrasion, avoid early abrasion problems caused by surface contact, and improve the limiting reliability. The thrust needle bearing assembly or the thrust washer is arranged at the rear end of the planetary gear and is sleeved on the planetary gear shaft to axially limit the planetary gear, the planetary gear and the bearing assembly are in linear contact and rolling friction, can effectively reduce abrasion, avoid early abrasion problems caused by surface contact sliding friction, and improve the limiting reliability.

[0022] Further, the sub-gearbox synchronizer in the prior art is in a series type, is generally arranged at the rear end or the front end of the planetary gear set, has a long axial dimension, a large number of parts, and complex installation; and the application realizes the function of the integrated synchronizer through parallel arrangement of the friction and gear engaging elements of the synchronizer on the radial outer side of the planetary gear ring, including a low-gear ring connecting plate, a synchronizer retainer, a synchronizer friction ring, and a synchronizer high-gear cone disc assembly, greatly shortens the axial dimension, greatly improves the capacity of the synchronizer, and has a small number of parts and convenient installation.

[0023] Further, all the friction pairs of the application are forcibly lubricated by spraying, lubricating liquid pumped by an oil pump passes through a housing oil channel, a sun gear oil channel, a planetary carrier welded assembly oil channel, and a planetary gear shaft oil channel in sequence, and forcibly spraying lubrication of friction elements such as gear meshing pairs, planetary gear needle bearings, output bearings, and thrust conical surfaces is simply, reliably and effectively realized.

[0024] Further, the planet wheel shaft limiting position of the application is realized by elastic pins or bolts, the elastic pin mounting step hole of the planet carrier assembly is coaxial with the first oil channel of the planet carrier assembly, a blind hole is formed on the planet wheel shaft, a step hole is formed on the rear planet carrier, the elastic pins or bolts are assembled in the blind hole of the planet wheel shaft and the step hole of the planet carrier assembly, the elastic pins or bolts limit the circumferential rotation and axial movement of the planet wheel shaft, and the large hole section of the step hole of the planet carrier assembly reserves the space for disassembling the elastic pins or bolts, the elastic pins can be pulled out by using a needle-nose pliers or the bolts can be disassembled by using a sleeve. The application realizes the circumferential and axial limiting of the planet wheel shaft simply and reliably under the premise of lubricating performance, is convenient to disassemble and assemble, greatly reduces the shaft diameter wear of the planet wheel shaft, and prolongs the service life of the planet needle bearing.

[0025] Further, the rear side end face of the rear planet carrier is connected with a retarder passive gear, so that the integration of the retarder function is realized, the axial dimension is greatly shortened, the structure is reliable and simple, and the cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0027] Figure 1 It is a schematic diagram of the sub-tank planet row assembly;

[0028] Figure 2 It is an enlarged view of the local structure of the planet wheel shaft;

[0029] Figure 3 It is an enlarged view of the local structure of the front end support of the planet carrier;

[0030] Figure 4 It is a schematic diagram of the contact between the thrust ring and the planet wheel cone surface;

[0031] Figure 5 It is an enlarged schematic diagram of the contact between the thrust ring and the planet wheel cone surface;

[0032] Figure 6 It is a schematic diagram of the local structure of the rear side limiting of the planet wheel;

[0033] Figure 7 It is a local schematic diagram of the planet gear structure.

[0034] Wherein: 1 - sun gear; 2 - roller bearing without outer ring; 3 - stop ring; 4 - thrust ring; 5 - planet gear; 6 - main case intermediate shaft; 7 - intermediate shaft tapered roller bearing; 8 - intermediate shaft bearing cover; 9 - rear cover housing; 10 - planet gear ring; 11 - planet carrier assembly; 12 - retarder driven gear; 13 - inner hexagonal cylindrical screw; 14 - output bearing cover; 15 - output bearing; 16 - oil seal; 17 - flange nut; 18 - flange plate; 19 - O-shaped sealing ring; 20 - speed measuring rotor; 21 - steel ball; 22 - bowl-shaped plug; 23 - planet gear shaft; 24 - elastic roll pin; 25 - bearing assembly; 26 - planet needle roller bearing; 27 - flange surface bolt; 28 - hollow pin; 29 - resisting gear ring connecting plate; 30 - synchronizer check ring; 31 - synchronizer friction ring; 32 - synchronizer high gear cone disc assembly; 33 - stop ring; 34 - transmission housing; 35 - two-axis rear bearing cover; 36 - oil distribution ring; 37 - two-axis rear bearing; 38 - connecting oil pipe; 39 - hollow oil plug; 40 - solid oil plug; 34.1 - first housing oil channel; 35.1 - second housing oil channel; 1.1 - sun gear first oil channel; 1.2 - sun gear second oil channel; 1.3 - sun gear third oil channel; 10.1 - planet row outer spline; 10.2 - planet gear ring check ring groove; 10.3 - planet gear ring yoke groove; 11.1 - planet carrier assembly first oil channel; 11.2 - planet carrier assembly second oil channel; 11.3 - planet carrier assembly third oil channel; 11.4 - planet carrier assembly fourth oil channel; 11.5 - planet carrier assembly step hole; 11.6 - planet carrier support bearing inner hole; 11.7 - planet carrier front end guide conical surface; 11.8 - planet carrier front end connecting spline; 23.1 - annular oil groove; 23.2 - first radial oil channel; 23.3 - central oil channel; 23.4 - second radial oil channel; 25.1 - check ring; 25.2 - planet carrier needle roller bearing; 25.3 - gasket. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0041] The present invention will now be described in further detail with reference to the accompanying drawings:

[0042] See Figure 1This invention discloses a planetary gearbox assembly for a transmission auxiliary gearbox, comprising: a planetary gear train assembly, bearing support components, auxiliary gearbox synchronizer-related components, sealing elements, a rear cover housing, and other major parts. The rear cover housing (9) is connected to the transmission housing (34) via a two-pin connection on one side. The planetary gear train assembly includes a sun gear 1, planet gears 5, a planetary ring gear 10, a planet carrier assembly 11, and a planetary gear shaft 23. The bearing support components include a rear bearing 37, a roller bearing without an outer ring 2, a planetary needle roller bearing 26, and an output bearing 15. The auxiliary gearbox synchronizer-related components include a low-gear ring gear connecting plate 29, a synchronizer retaining ring 30, a synchronizer friction ring 31, and a synchronizer high-gear cone disc assembly 32. The sealing elements include an oil seal 16, an O-ring seal 19, and a cup-shaped plug 22. The other major parts include a thrust needle roller bearing assembly 25, a retarder driven gear 12, a speed measuring rotor 20, a flange 18, and a flange nut 17.

[0043] The sun gear 1 and the second shaft are an integral gear structure. The rear end of the second shaft is supported on the transmission housing 34 by the second shaft rear bearing 37, and the front end of the second shaft is supported in the inner hole of the first shaft by a bearing. Along the power transmission direction, the rear end of the second shaft is sequentially arranged with the second shaft rear bearing 37, an oil distribution ring 36, a roller bearing without an outer ring 2, a retaining ring 3, and a thrust ring 4. The sun gear 1 has five planetary gears 5 evenly distributed around it, meshing with it. The planetary gears 5 are supported on the planetary gear shaft 23 by needle roller bearings 26, and both ends of the planetary gear shaft 23 are supported on the planetary carrier assembly 11. Figure 2 As shown, a thrust ring 4 is non-coaxially mounted at the front end of planetary gear 5; a thrust needle roller bearing assembly 25 or a wear-resistant non-metallic thrust washer is coaxially mounted at the rear end of planetary gear 5; such as Figure 4 and 5 As shown, the contact surface between planetary gear 5 and thrust ring 4 consists of two non-coaxial mating conical surfaces with a taper of 3°; as Figure 6 As shown, the thrust needle roller bearing assembly 25 consists of a retaining ring 25.1, a cage needle roller bearing assembly 25.2, and a washer 25.3. The retaining ring 25.1 contacts the planetary needle roller bearing 26 and is fitted onto the planetary gear shaft 23 to prevent the planetary needle roller bearing 26 from moving backward. The planetary carrier needle roller bearing 25.2 is fitted onto the retaining ring 25.1 and is located between the planetary gear 5 and the washer 25.3. One side of the planetary carrier needle roller bearing assembly 25.2 contacts the end face of the planetary gear 5, and the other side contacts the washer 25.3. The washer 25.3 contacts the planetary carrier welded assembly 11. Figure 2As shown, the ring oil groove 23.1, the central oil channel 23.3, the first radial oil channel 23.2 and the second radial oil channel 23.4 are arranged on the planetary wheel shaft 23, the bowl-shaped plug 22 is arranged at the rear end of the central oil channel 23.3 for sealing, the planet carrier assembly step hole 11.5 is arranged on the planet carrier assembly 11, the blind hole coaxial with the planet carrier assembly step hole 11.5 and having the same hole diameter is arranged on the planetary wheel shaft 23, and the elastic roll pin 24 is arranged in the blind hole of the planetary wheel shaft 23 and the planet carrier assembly step hole 11.5. The planet carrier assembly 11 is made by welding the front planet carrier and the rear planet carrier, the front planet carrier is supported on the sun gear 1 through the roller bearing without outer ring 2, the rear planet carrier is an integrated structure of the planet carrier and the output shaft, and is supported on the rear cover shell 9 through the output bearing 15; the output shaft part of the rear planet carrier is sequentially arranged with the output bearing 15, the speed measuring rotor 20, the flange plate 18, the O-shaped sealing ring 19 and the flange nut 17 along the power transmission direction; as shown Figure 3 As shown, the planet carrier support bearing inner hole 11.6 matched with the roller bearing without outer ring 2 is arranged on the front planet carrier, the guide conical surface 11.7 is arranged at the front end of the inner hole for guiding the planet carrier assembly 11 to be arranged, the planet carrier assembly 11 is supported on the roller bearing without outer ring 2, the roller bearing without outer ring 2 is arranged on the sun gear and is axially limited by the shaft shoulder and the stop ring on the sun gear; the outer spline 11.8 is arranged on the outer side of the front planet carrier and is connected with the synchronizer high gear cone disc assembly 32, the synchronizer high gear cone disc assembly 32 is a combined part of the cone disc and the high gear ring gear, is connected with the outer spline of the front planet carrier through the inner spline, and the axial limitation is realized through the stop ring 33; when the planet gear ring moves forward to engage the high gear, the planet carrier assembly and the planet gear ring can be rigidly connected, and the output speed ratio is 1.

[0044] Referring to Figure 2The oil passage structure comprises a housing oil passage, a sun gear oil passage, a planet carrier assembly oil passage, a planet wheel shaft oil passage and a connecting oil pipe 38; the transmission housing 34 is connected with a two-axle rear bearing cover 35; the two-axle rear bearing cover 35 is provided with an oil distribution ring 36 with an oil passage at the contact position with the sun gear 1; the housing oil passage comprises a first housing oil passage 34.1 arranged on the transmission housing 34 and a second housing oil passage 35.1 arranged on the two-axle rear bearing cover 35; the first housing oil passage 34.1 and the second housing oil passage 35.1 are communicated; the sun gear oil passage comprises a sun gear first oil passage 1.1 located radially on the sun gear 1, a sun gear second oil passage 1.2 located axially on the sun gear 1 and a sun gear third oil passage 1.3 located radially on the sun gear 1 which are communicated in sequence; the second housing oil passage 35.1 is communicated with the sun gear first oil passage 1.1 through the oil passage on the oil distribution ring 36; the sun gear third oil passage 1.3 is used for spraying and lubricating the contact surface of the thrust ring 4 and the planet wheel 5; the planet carrier assembly oil passage comprises a planet carrier assembly second oil passage 11.2, a planet carrier assembly fourth oil passage 11.4, a planet carrier assembly third oil passage 11.3 and a planet carrier assembly first oil passage 11.1 which are communicated in sequence; the number of the fourth oil passage 11.4, the third oil passage 11.3 and the first oil passage 11.1 is same as the number of the planet wheel 5; the planet carrier assembly second oil passage 11.2 is communicated with the sun gear second oil passage 1.2 through the connecting oil pipe 38; the end of the planet carrier assembly third oil passage 11.3 is provided with a hollow oil plug 39 which is provided with a central small hole for spraying lubricating liquid to the meshing area of the sun gear 1 and the planet wheel 5; the end of the planet carrier assembly fourth oil passage 11.4 is provided with 1-2 hollow oil plugs 39 for spraying and lubricating the output shaft bearing, and the remaining planet carrier assembly fourth oil passages 11.4 are provided with solid oil plugs 40 for sealing the oil passage; the planet wheel shaft oil passage comprises an annular oil groove 23.1, a first radial oil passage 23.2, a central oil passage 23.3 and a second radial oil passage 23.4 which are communicated in sequence; the annular oil groove 23.1 is communicated with the planet carrier assembly first oil passage 11.1; the end of the central oil passage 23.3 is provided with a bowl-shaped plug 22 for sealing.The output bearing 15 is of an outer ring flange structure, and its axial movement is limited by the coupling of the output bearing cover 14 and the rear cover shell 9. The rear end seat hole of the output bearing cover 14 is provided with an oil seal 16, and the lip of the oil seal 16 cooperates with the flange plate 18 to realize the sealing of the output end.

[0045] Referring to Figure 1 and Figure 7 , the planetary gear ring 10 is in floating engagement with the five planetary gears 5 through the inner teeth and the outer teeth; the low gear ring coupling plate 29 is coupled to the rear cover shell 9 through a plurality of flange surface bolts 27 and three hollow pins 28; the planetary gear ring 10 integrates the function of the synchronizer sleeve of the auxiliary gearbox, and is provided with a planetary row outer spline 10.1, a synchronizer friction ring 31 fitted on the planetary row outer spline 10.1, a retainer ring groove 10.2 for installing a synchronizer retainer 30, and a fork groove 10.3 for installing a gearbox shift fork; as shown in Figure 7 , the synchronizer assembly includes the low gear ring coupling plate 29, the synchronizer retainer 30, the synchronizer friction ring 31, and a synchronizer high gear cone disc assembly 32;

[0046] The planetary gear ring 10 is provided with a planetary row outer spline 10.1; the synchronizer friction ring 31 is fitted on the planetary row outer spline 10.1 of the planetary gear ring 10; the planetary row outer spline 10.1 is provided with a retainer ring groove 10.2; the retainer ring groove 10.2 is installed with the synchronizer retainer 30; the planetary row outer spline 10.1 is provided with a fork groove 10.3 for installing a gearbox shift fork to perform a gear shifting action; the low gear ring coupling plate 29 is fixedly connected to the rear cover shell 9, and is used to contact the cone surface of the synchronizer friction ring 31 to synchronize the speed when the gear is shifted backward, and then engage with the planetary gear ring 10 to complete the fixed connection of the planetary gear ring 10 and the rear cover shell 9, so as to realize the low speed ratio; the synchronizer high gear cone disc assembly 32 is connected to the outer spline of the front planetary carrier of the planetary carrier assembly 11 through the inner spline, and is used to contact the cone surface of the synchronizer friction ring 31 to synchronize the speed when the gear is shifted forward, and then engage with the planetary gear ring 10 to complete the fixed connection of the planetary gear ring 10 and the planetary carrier assembly 11, so as to realize the output with a speed ratio of 1.

[0047] When the planetary gear ring 10 is shifted forward or backward, the synchronizer retainer 30 acts on the synchronizer friction ring 31, so that the front or rear cone surface of the synchronizer friction ring 31 respectively contacts the cone surface of the high gear cone disc assembly 32 and the cone surface of the low gear ring coupling plate 29 to realize synchronization, and the combination teeth are engaged to realize gear shifting; when the gear is shifted backward, the planetary row outer spline 10.1 is engaged with the low gear ring coupling plate 29 to realize the fixation of the gear ring and the output of the planetary carrier; when the gear is shifted forward, the inner teeth are engaged with the outer spline of the high gear cone disc assembly 32 to lock the planetary carrier and the inner gear together, so as to achieve the output with a speed ratio of 1;

[0048] The passive gear 12 of the retarder is coupled on the rear end face of the planetary carrier assembly 11 by a snap centering and an internal hexagonal cylindrical screw 13; the centering is realized by the radial fit of the inner hole of the passive gear 12 of the retarder and the rear end shaft of the planetary carrier assembly 11.

[0049] The working process of the present application is as follows:

[0050] The sun gear 1 is always in mesh with the five planetary gears 5 which are evenly distributed in the circumferential direction, and the five planetary gears 5 are always in mesh with the planetary gear ring 10, which can slide forward and backward along the power input direction under the action of the auxiliary gearbox shift fork; when the planetary gear ring 10 slides forward to engage the high gear, the synchronizer ring 31 is acted on by the synchronizer ring 30, so that the front tapered surface of the synchronizer ring 31 is tightly attached to the tapered surface of the synchronizer high gear cone disc assembly 32 to synchronize the rotational speed; after the rotational speed is synchronized, the inner teeth of the planetary gear ring 10 are combined with the outer splines of the synchronizer high gear cone disc assembly 32 to realize the gear engagement; at this time, since the synchronizer high gear cone disc assembly 32 is splined-coupled with the planetary carrier assembly 11, the planetary gear ring 10 and the planetary carrier assembly 11 are locked together, achieving the purpose of outputting the high gear speed ratio 1; similarly, when the planetary gear ring 10 slides backward to engage the low gear, the synchronizer ring 31 is acted on by the synchronizer ring 30, so that the rear tapered surface of the synchronizer ring 31 is tightly attached to the tapered surface of the low gear ring connecting plate 29 to synchronize the rotational speed; after the synchronization is completed, the inner teeth of the low gear ring connecting plate 29 are combined with the outer splines 10-1 of the planetary gear ring 10 to realize the gear engagement, and the low gear ring connecting plate 29 is fixedly connected with the rear cover shell 9, therefore, the planetary gear ring 10 is also fixed by the rear cover shell 9; at this time, the planetary carrier outputs the reduction ratio, and the speed ratio is 1+(planetary gear inner tooth number / sun gear tooth number). In addition, the passive gear 12 of the retarder is fixedly connected with the planetary carrier assembly 11, which can provide braking load for the retarder.

[0051] The above only describes the preferred embodiments of the present application and is not used to limit the present application; for those skilled in the art, the present application can have various modifications and changes; any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A variator sub-transmission planetary array assembly characterised in that, It comprises a planetary row, a rear cover shell (9) and a two-shaft; the rear cover shell (9) is connected with a transmission shell (34); the planetary row comprises a planetary carrier assembly (11), a sun gear (1), a planetary gear (5), a planetary gear ring (10) and a planetary shaft (23); The planetary carrier assembly (11) is composed of a front planetary carrier and a rear planetary carrier which are fixedly connected; the front planetary carrier is supported on the two-shaft through a bearing; the rear planetary carrier is supported on the rear cover shell (9) through a bearing; the rear planetary carrier is an integral structure with the output shaft for power output; the sun gear (1) is an integral shaft tooth structure with the two-shaft, supported on the transmission shell (34) through a bearing; the front end of the planetary shaft (23) is supported on the front planetary carrier and the rear end is supported on the rear planetary carrier; the sun gear (1) is uniformly meshed with a plurality of planetary gears (5) supported on the planetary shaft (23) through a bearing; the plurality of planetary gears (5) are all meshed with the inner teeth of the planetary gear ring (10); The sun gear is spline-connected with a thrust ring (4) for contacting the front end of the planetary gear (5) to limit the axial direction of the planetary gear (5); the planetary shaft (23) is sleeved with a bearing assembly (25) or a thrust washer for contacting the rear end of the planetary gear (5) to limit the axial direction of the planetary gear (5); The contact surface of the thrust ring (4) and the planetary gear (5) is two non-coaxial matching taper surfaces; the bearing assembly (25) is composed of a retainer (25.1), a planetary carrier needle bearing (25.2) and a washer (25.3); the retainer (25.1) contacts the rear end surface of the planetary needle bearing (26) and is sleeved on the planetary shaft (23); the washer (25.3) contacts the rear planetary carrier; the planetary carrier needle bearing (25.2) is sleeved on the retainer (25.1) and located between the planetary gear (5) and the washer (25.3).

2. The transmission range assembly of claim 1, wherein, The taper of the matching taper surface is 3°.

3. The transmission range assembly of claim 2, wherein, It also comprises a synchronizer assembly; the synchronizer assembly comprises a low gear ring coupling plate (29), a synchronizer friction ring (31) and a synchronizer high gear cone disc assembly (32); The planetary gear ring (10) is provided with a planetary row external spline (10.1); the synchronizer friction ring (31) is sleeved on the planetary row external spline (10.1) of the planetary gear ring (10); the planetary row external spline (10.1) is provided with a retainer ring groove (10.2); the retainer ring groove (10.2) is installed with a synchronizer retainer (30); the planetary row external spline (10.1) is provided with a fork groove (10.3) for installing a sub-gearbox fork to perform a gear shifting action; the low gear ring coupling plate (29) is fixedly connected on the rear cover shell (9) for contacting the synchronizer friction ring (31) taper surface to synchronize the speed when the gear is engaged backward; the synchronizer high gear cone disc assembly (32) is connected on the outer spline of the front planetary carrier of the planetary carrier assembly (11) through its internal spline for contacting the synchronizer friction ring (31) taper surface to synchronize the speed when the gear is engaged forward.

4. The transmission range assembly of claim 3, wherein, Also include oil channel structure; the oil channel structure includes housing oil channel, sun gear oil channel, planet carrier assembly oil channel, planetary shaft oil channel and coupling oil pipe (38); The transmission housing (34) is matched with two shaft rear bearing cover (35); The two shaft rear bearing cover (35) is provided with the oil distribution ring (36) of oil channel at the contact with sun gear (1); The housing oil channel includes the first housing oil channel (34.1) arranged on the transmission housing (34) and the second housing oil channel (35.1) arranged on the two shaft rear bearing cover (35); The first housing oil channel (34.1) and the second housing oil channel (35.1) are communicated;The sun gear oil channel includes sun gear first oil channel (1.1) located radially in sun gear (1), sun gear (1) axial sun gear second oil channel (1.2) and sun gear third oil channel (1.3) located radially in sun gear (1) in sequence;The second housing oil channel (35.1) is communicated with the sun gear first oil channel (1.1) by the oil channel on the oil distribution ring (36);The sun gear third oil channel (1.3) is used for making the contact surface of thrust ring (4) and planet wheel (5) be sprayed and lubricated;The planet carrier assembly oil channel includes planet carrier assembly second oil channel (11.2), planet carrier assembly fourth oil channel (11.4), planet carrier assembly third oil channel (11.3) and planet carrier assembly first oil channel (11.1) in sequence;The fourth oil channel (11.4), the third oil channel (11.3), the first oil channel (11.1) are all same in number with planet wheel (5);The planet carrier assembly second oil channel (11.2) is communicated with the sun gear second oil channel (1.2) by the coupling oil pipe (38);The end of the planet carrier assembly third oil channel (11.3) is provided with the hollow oil plug (39), and the hollow oil plug (39) is provided with a central small hole, for spraying lubricating liquid to the meshing area of sun gear (1) and planet wheel (5);The end of the planet carrier assembly fourth oil channel (11.4) is provided with a plurality of hollow oil plugs (39) for spraying output shaft bearing, and the end of the planet carrier assembly fourth oil channel (11.4) at the rest position is provided with solid oil plug (40) for sealing;The planetary shaft oil channel includes annular oil groove (23.1), first radial oil channel (23.2), central oil channel (23.3) and second radial oil channel (23.4) in sequence;The annular oil groove (23.1) is communicated with the planet carrier assembly first oil channel (11.1);The central oil channel (23.3) is provided with bowl-shaped plug (22) at the end for sealing.

5. The transmission range assembly of claim 4, wherein, The coupling oil pipe (38) is provided with a small hole radially, and the oil can be sprayed to the bearing assembly (25).

6. The transmission range assembly of claim 5, wherein, The rear side of the rear row of planet carrier is provided with a planet carrier assembly step hole (11.5) coaxial with the planet carrier assembly first oil channel (11.1); the planet wheel shaft (23) is provided with a blind hole coaxial with the planet carrier assembly step hole (11.5) and having the same hole diameter; the circumferential rotation and axial movement of the planet wheel shaft (23) are limited by elastic pins or bolts sequentially penetrating the planet carrier assembly step hole (11.5) and the blind hole.

7. The transmission range assembly of claim 6, wherein, A large hole section having a hole diameter larger than that of the blind hole is arranged at the entrance of the planet carrier assembly step hole (11.5), facilitating the disassembly of the elastic pins or bolts.

8. The transmission range assembly of claim 7, wherein, The rear side of the rear row of planet carrier is connected with a retarder driven gear (12) for realizing the integration of the retarder function.

9. The transmission range assembly of claim 1, wherein, The sun gear (1) is circumferentially and uniformly meshed with five planet wheels (5).

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