CN213064583U - Limiting structure for planetary wheel shaft of planetary transmission assembly - Google Patents

Abstract

The disclosure relates to the technical field of automatic transmissions, and provides a limiting structure for a planet wheel shaft of a planetary transmission assembly. This limit structure includes, and the fender oil board includes supporting part and fender oil portion, forms the pocket oil cavity body between the tip of fender oil portion and planet carrier, and the one end that the fender oil board was kept away from to the planet wheel axle is equipped with joint portion, and the planet carrier is equipped with the dog towards the direction extension of joint portion, and joint portion supports in one side of dog towards the fender oil board, and joint portion and dog are along the spacing cooperation of the circumference direction of planet wheel axle. The oil inlet end of this open planet wheel axle is spacing through keeping off the oil board, and the other end is spacing through the dog to cooperation through between joint portion and the dog realizes that the circumference of planet wheel axle is spacing, simple structure, simple to operate, and dog and joint portion form by planet carrier and planet wheel axle itself respectively, need not additionally to set up other parts, saves the cost, and the oil board plays the effect of supporting planet wheel axle when leading oil, and structural design is compact, effectively reduces occupation space.

Description

Limiting structure for planetary wheel shaft of planetary transmission assembly

Technical Field

The present disclosure relates to the technical field of automatic transmissions, and in particular, to a limiting structure for a planetary gear shaft of a planetary transmission assembly.

Background

An automotive transmission is a set of transmission devices for coordinating the rotational speed of an engine and the actual driving speed of wheels, and is used for exerting the best performance of the engine. The transmission can generate different gear ratios between an engine and wheels during the running process of the automobile, and the transmission of rotating speeds of different gears is realized.

The manual transmission mainly comprises gears and a rotating shaft, and the speed change and torque change are generated by different gear combinations; the automatic transmission AT consists of a hydraulic torque converter, a planetary gear and a hydraulic control system, and achieves speed and torque changing through a hydraulic transmission and gear combination mode.

Among them, the automatic transmission has advantages of comfortable driving, reducing fatigue of driver, etc., and has become a development direction of modern car configuration. The automatic transmission utilizes a planetary gear mechanism to change speed, can automatically change speed according to the degree of an accelerator pedal and the change of vehicle speed, and a driver only needs to operate the accelerator pedal to control the vehicle speed, so that the driver can watch road traffic with full attention without being confused by gear shifting.

The automatic transmission comprises a plurality of planetary transmission assemblies and a plurality of shifting elements, wherein the shifting elements comprise clutches and brakes, and the transmission ratio of the transmission is changed by controlling the transmission relationship among different planetary transmission assemblies through the opening and closing of the clutches and the brakes.

The planetary transmission assembly comprises a sun gear, a planet carrier and a gear ring. The sun gear is coaxially arranged inside the gear ring, the planet gear is meshed between the sun gear and the gear ring, the planet gear is rotatably arranged on planet gear shafts, and the end parts of the planet gear shafts are connected through a planet carrier. In the use process, when the gear ring is not moved, the planet wheel can be driven to rotate through the rotation of the sun wheel, and then the planet wheel shaft and the planet carrier are driven to rotate around the axis of the sun wheel through the planet wheel.

In order to increase the smoothness of rotation between the planetary gear and the planetary gear shaft and reduce the wear therebetween, a needle bearing is generally provided between the planetary gear and the planetary gear shaft. In the use process of the roller bearing, lubricating oil needs to be injected, so that oil ways need to be arranged on the planet wheel shaft and the sun wheel. Specifically, the sun gear is arranged on an input shaft of the transmission, and hydraulic oil in an oil path of the transmission enters the oil path of the sun gear. Because the internal components of the transmission are in a rotating state in the use process, the hydraulic oil flowing out of the sun gear oil path flows towards the outer ring direction of the transmission under the action of centrifugal force. In order to enable the hydraulic oil to flow into the oil path of the planet wheel shaft, an oil blocking component needs to be arranged at the oil inlet end of the planet wheel shaft (namely the oil outlet end of the sun wheel), and the oil blocking component guides the hydraulic oil into the oil path of the planet wheel shaft, so that the effect of lubricating the needle bearing is achieved.

In the prior art, in order to increase the convenience of production, the planet carrier usually adopts a split structure, and then the two split structures are welded together to form the planet carrier. Therefore, in order to mount the planet wheel shaft, a mounting hole needs to be formed in the planet carrier, two ends of the planet wheel shaft extend into the mounting hole, and the planet wheel shaft is mounted on the planet carrier through a fixing piece. However, this kind of mounting means need additionally set up the mounting, and the structure is comparatively complicated, and the installation effectiveness is low, simultaneously, need additionally set up the fender oil assembly in planet wheel axle's tip, and space utilization is relatively poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem mentioned above or at least partially solve the technical problem mentioned above, the present disclosure provides a limit structure for a planetary gear shaft of a planetary transmission assembly.

The utility model provides a limit structure for planet wheel axle of planetary transmission subassembly, be in including setting up the fender oil board of planet carrier tip of planetary transmission subassembly, fender oil board is including being used for supporting the supporting part of the oil feed end of planet wheel axle, and by the fender oil portion that the supporting part set up towards the input shaft direction extension of derailleur, fender oil portion with form the pocket oil cavity body between the tip of planet carrier, pocket oil cavity body with the lubricated oil circuit intercommunication of planet wheel axle, the planet wheel axle is kept away from the one end extension of fender oil board is equipped with joint portion, the planet carrier orientation the direction extension of joint portion is equipped with the dog, joint portion supports the dog orientation one side of fender oil board, joint portion with the dog along the spacing cooperation of the circumference direction of planet wheel axle.

Optionally, the inner ring of the support portion bends towards a direction away from the planetary wheel shaft to form a transition section, and the inner ring of the transition section extends towards the input shaft to form the oil blocking portion.

Optionally, the outer ring of the supporting portion extends towards the direction away from the planet wheel shaft to form a mounting plate, and the planet carrier is provided with a mounting groove matched with the mounting plate.

Optionally, the mounting plate and the mounting groove are in interference fit.

Optionally, the periphery of mounting panel is equipped with annular bulge, the inner wall of mounting groove with the protruding corresponding position of annular is equipped with the ring channel, annular bulge with the ring channel phase-match.

Optionally, the oil baffle and the planet carrier are made of aluminum.

Optionally, the oil blocking portion is hollow, and the diameter of the inner ring of the oil blocking portion is matched with the diameter of the inner ring of the planet carrier.

Optionally, the joint portion includes by planet wheel axle orientation is kept away from the card post that the direction extension of oil baffle set up, the card post stretches out the planet carrier, the planet carrier is kept away from one side of oil baffle is equipped with the annular plate, the dog by the periphery orientation of annular plate the direction extension of card post forms.

Optionally, the clamp column extends towards the direction away from the oil baffle plate and is provided with a limiting part, the limiting part and a clamping groove matched with the shape of the stop block are formed between the end parts of the clamp column, the stop block faces one side of the oil baffle plate and supports the end part of the clamp column, the limiting part faces one side of the input shaft and is attached to the stop block, and the limiting part is matched with the stop block in a limiting mode along the circumferential direction of the planetary gear shaft.

Optionally, a contact surface between the stopper and the limiting portion is a plane.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

the oil inlet end of this open planet wheel axle is spacing through keeping off the oil board, and the other end is spacing through the dog to cooperation through between joint portion and the dog realizes that the circumference of planet wheel axle is spacing, simple structure, simple to operate, and dog and joint portion form by planet carrier and planet wheel axle itself respectively, need not additionally to set up other parts, saves the cost, and the oil board plays the effect of supporting planet wheel axle when leading oil, and structural design is compact, effectively reduces occupation space.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic diagram of a planet carrier with a planet wheel shaft mounted thereon according to an embodiment of the disclosure;

fig. 2 is an enlarged view of a point a in fig. 1.

10, a planet carrier; 11. an annular groove; 20. an oil baffle plate; 21. a support portion; 22. an oil retaining portion; 23. a transition section; 24. mounting a plate; 30. an oil pocket cavity; 40. a planetary wheel shaft; 41. A lubrication oil path; 50. clamping the column; 51. a limiting part; 60. an annular plate; 61. a stopper; 70. a planet wheel; 80. a needle bearing.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

As shown in fig. 1, the planetary carrier 10 includes a planetary carrier body and a planetary disk, through holes for mounting the planetary shafts 40 are respectively disposed at positions corresponding to the planetary carrier body and the planetary disk, and two ends of the planetary shafts 40 are flush with outer sides of the planetary carrier body and the planetary disk, respectively. The planetary gear 70 is arranged on the periphery of the planetary gear shaft 40, and a needle bearing 80 is arranged between the planetary gear 70 and the planetary gear shaft 40 for increasing the smoothness of rotation. One end of the lubricating oil path 41 of the planet wheel shaft 40 is communicated with the oil pocket cavity 30, and the other end of the lubricating oil path is communicated with the needle bearing 80. Wherein, each planet wheel 70 all meshes the periphery that sets up at the sun gear, and is equipped with the oil circuit that is used for with the main oil circuit intercommunication of derailleur input shaft on the sun gear, behind the hydraulic oil outflow circuit in the sun gear, flows towards the periphery of derailleur under the effect of centrifugal force. The present application mainly protects the arrangement of the planetary gear shaft 40, and therefore, the sun gear is not shown in the drawings, and similarly, the ring gear is not shown in the drawings.

Referring to fig. 1 and 2, the limiting structure for the planetary gear shaft of the planetary transmission assembly provided by the embodiment of the present application includes an oil baffle plate 20 disposed at an end of a planet carrier 10 of the planetary transmission assembly. As shown in fig. 2, the oil baffle 20 includes a support portion 21 for supporting an oil inlet end of the planetary gear shaft 40, and an oil baffle portion 22 extending from the support portion 21 toward an input shaft of the transmission, an oil pocket 30 is formed between the oil baffle portion 22 and an end of the planetary carrier 10, the oil pocket 30 communicates with a lubrication oil path 41 of the planetary gear shaft 40, and hydraulic oil enters the lubrication oil path 41 through the oil pocket 30. The support portion 21 does not shield the oil inlet end of the lubrication oil path 41 or partially shields the oil inlet end of the lubrication oil path 41, so that the hydraulic oil can flow into the lubrication oil path 41. As shown in fig. 1, a clamping portion is extended from one end of the planet wheel shaft 40 away from the oil baffle 20, a stopper 61 is extended from the planet carrier 10 in a direction towards the clamping portion, the clamping portion is supported on one side of the stopper 61 towards the oil baffle 20, and the clamping portion is in limit fit with the stopper 61 in a circumferential direction of the planet wheel shaft 40.

This disclosed oil feed end of planet wheel axle 40 is spacing through oil baffle 20, it is spacing that the other end passes through dog 61, and it is spacing to realize the circumference of planet wheel axle 40 through the cooperation between joint portion and the dog 61, moreover, the steam generator is simple in structure, high durability and convenient installation, and dog 61 and joint portion are formed by planet carrier 10 and planet wheel axle 40 itself respectively, need not additionally to set up other parts, save the cost, oil baffle 20 plays the effect of supporting planet wheel axle 40 when leading oil, structural design is compact, effectively reduce occupation space.

As shown in fig. 2, the inner ring of the support portion 21 is bent away from the planetary gear shaft 40 to form a transition section 23, and the inner ring of the transition section 23 extends toward the input shaft to form an oil blocking portion 22. Make to keep off between the tip that oil portion 22 and planet carrier 10 and form the clearance through setting up changeover portion 23, and then form pocket oil cavity 30 for oil baffle 20 has pocket oil and supports the effect of planet wheel axle 40, and the reduction space occupies. Preferably, the position of the transition section 23 corresponds to the position of the lubrication oil path 41, and since the transition section 23 is inclined toward a direction away from the planetary wheel shaft 40, the transition section 23 can guide the flow of the hydraulic oil, so that the hydraulic oil can enter the lubrication oil path 41.

As shown in fig. 1 and 2, the mounting plate 24 is provided on the outer ring of the support portion 21 and extends in a direction away from the planetary gear shaft 40, and the carrier 10 is provided with a mounting groove matching with the mounting plate 24. The mounting plate 24 is arranged in the mounting groove, so that the oil baffle plate 20 is positioned, and the space of the planet carrier 10 is reasonably utilized. Further optimally, the mounting plate 24 and the mounting groove are in interference fit, and the fixing effect is effectively improved.

As shown in fig. 2, an annular protrusion is disposed on the periphery of the mounting plate 24, an annular groove 11 is disposed on the inner wall of the mounting groove at a position corresponding to the annular protrusion, and the annular protrusion is matched with the annular groove 11, where matching means that the annular protrusion can be clamped in the annular groove 11. Through annular protrusion and ring channel 11, increase the spacing effect of oil baffle 20 in the axial direction of planet shaft 40, prevent that oil baffle 20 from removing under the reaction force of oil pressure. Further optimally, the oil baffle plate 20 and the planet carrier 10 are both made of aluminum materials, the weight of the oil baffle plate 20 and the weight of the planet carrier 10 can be effectively reduced, and the annular protrusion is formed by stamping the mounting plate 24 and the position corresponding to the annular groove 11, so that the firmness is improved.

As shown in fig. 1, the oil blocking portion 22 is hollow, so that other components can be avoided, and the installation of other components is facilitated. The diameter of the inner ring of the oil blocking portion 22 is matched with the diameter of the inner ring of the planet carrier 10, so that the hydraulic oil flowing out of the sun gear oil path can contact the side surface of the oil blocking portion 22 and further enter the lubricating oil path 41. Specifically, the hydraulic oil flowing out through the sun gear oil path flows against the periphery of the planetary gear shaft 40 under the action of centrifugal force, a slope is arranged at the end of the planetary gear shaft 40, and the hydraulic oil flows into the oil pocket cavity 30 against the slope.

As shown in fig. 1, the snap-in portion includes a snap-in post 50 extending from the planet wheel shaft 40 toward a direction away from the oil baffle 20, the snap-in post 50 extends out of the planet carrier 10, an annular plate 60 is disposed on a side of the planet carrier 10 away from the oil baffle 20, and a stopper 61 is formed by extending an outer periphery of the annular plate 60 toward the snap-in post 50. Specifically, the clamp column 50 extends towards the direction away from the oil baffle plate 20 to form a limiting portion 51, a clamping groove matched with the shape of the stop block 61 is formed between the limiting portion 51 and the end portion of the clamp column 50, one side of the stop block 61 facing the oil baffle plate 20 is supported at the end portion of the clamp column 50, one side of the limiting portion 51 facing the input shaft is attached to the stop block 61, and the limiting portion 51 is in limiting fit with the stop block 61 along the circumferential direction of the planetary gear shaft 40. Preferably, the contact surface between the stopper 61 and the stopper 51 is a flat surface. In other embodiments, the contact surface between the stopper 61 and the limiting portion 51 may also be saw-toothed. The shape of the contact surface between the stopper 61 and the stopper portion 51 is not limited as long as the stopper 61 and the stopper portion 51 are not rotatable in the circumferential direction of the planetary gear shaft 40.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The limiting structure for the planet wheel shaft of the planetary transmission assembly is characterized by comprising an oil baffle plate (20) arranged at the end part of a planet carrier (10) of the planetary transmission assembly, wherein the oil baffle plate (20) comprises a supporting part (21) used for supporting the oil inlet end of the planet wheel shaft (40) and an oil baffle part (22) extended and arranged from the supporting part (21) towards the input shaft direction of a transmission, an oil pocket cavity (30) is formed between the oil baffle part (22) and the end part of the planet carrier (10), the oil pocket cavity (30) is communicated with a lubricating oil way (41) of the planet wheel shaft (40), a clamping part is extended and arranged at one end, far away from the oil baffle plate (20), of the planet wheel shaft (40), a stop block (61) is extended and arranged from the direction of the clamping part, and supported at one side, facing the oil baffle plate (20), of the stop block (61), the clamping portion is in limit fit with the stop block (61) along the circumferential direction of the planetary wheel shaft (40).

2. A stopper structure for a planetary gear shaft of a planetary gear transmission assembly according to claim 1, wherein the inner race of the support portion (21) is bent away from the planetary gear shaft (40) to form a transition section (23), and the inner race of the transition section (23) extends towards the input shaft to form the oil blocking portion (22).

3. The limiting structure for the planetary wheel shaft of the planetary transmission assembly according to claim 1, wherein the outer ring of the supporting portion (21) extends towards the direction away from the planetary wheel shaft (40) to form a mounting plate (24), and the planet carrier (10) is provided with a mounting groove matched with the mounting plate (24).

4. A spacing structure for the planet wheel axles of a planetary transmission assembly according to claim 3, characterized in that the mounting plate (24) and the mounting groove are interference fit.

5. A limiting structure for a planetary wheel shaft of a planetary transmission assembly according to claim 3, wherein the mounting plate (24) is provided with an annular protrusion at the periphery, and an annular groove (11) is provided at the position of the inner wall of the mounting groove corresponding to the annular protrusion and matched with the annular groove (11).

6. The limiting structure for the planetary gear shaft of the planetary transmission assembly according to claim 5, wherein the oil baffle plate (20) and the planet carrier (10) are both made of aluminum.

7. The limit structure for the planetary shaft of the planetary transmission assembly according to claim 1, wherein the oil blocking portion (22) is hollow inside, and the diameter of the inner ring of the oil blocking portion (22) matches the diameter of the inner ring of the planet carrier (10).

8. The limiting structure for the planet wheel shaft of the planetary transmission assembly according to claim 1, wherein the clamping portion comprises a clamping column (50) extending from the planet wheel shaft (40) in a direction away from the oil baffle plate (20), the clamping column (50) extends out of the planet carrier (10), an annular plate (60) is arranged on one side of the planet carrier (10) away from the oil baffle plate (20), and the stop block (61) is formed by extending the outer periphery of the annular plate (60) in the direction towards the clamping column (50).

9. The limiting structure for the planetary wheel shaft of the planetary transmission assembly according to claim 8, wherein the clamping column (50) extends to a direction away from the oil baffle plate (20) to form a limiting portion (51), a clamping groove matched with the shape of the stopper (61) is formed between the limiting portion (51) and the end portion of the clamping column (50), one side of the stopper (61) facing the oil baffle plate (20) is supported on the end portion of the clamping column (50), one side of the limiting portion (51) facing the input shaft is attached to the stopper (61), and the limiting portion (51) is in limiting fit with the stopper (61) along the circumferential direction of the planetary wheel shaft (40).

10. The limit structure for the planetary shaft of the planetary transmission assembly as set forth in claim 9, wherein the contact surface of the stopper (61) with the limit portion (51) is a flat surface.

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