CN116733957A - Planet carrier structure and novel NGW planetary reducer - Google Patents

Abstract

The application discloses a planet carrier structure and a novel NGW planet speed reducer, which relates to the technical field of speed reducers, and comprises the following components: the first planet carrier is uniformly provided with a plurality of first shaft holes along the circumferential direction, and a plurality of clamping ports are uniformly arranged on the first planet carrier along the edge of the first planet carrier; the second planet carrier comprises a base plate which is in an annular plate shape, and a plurality of bearing platforms which are uniformly arranged along the circumferential direction are arranged on one side surface of the base plate; the substrate is provided with a second shaft hole; the end face of each bearing platform far away from the substrate is provided with a clamping boss; the clamping interfaces of the first planet carrier are clamped and welded on the clamping bosses one by one. The application also discloses an NGW planetary reducer, which comprises a sun gear, a gear ring, a plurality of planetary gears, a plurality of mandrels and the planetary carrier structure. According to the planet carrier structure and the novel NGW planetary reducer, the planet carrier structure is manufactured in a split mode and welded, so that the processing difficulty is reduced, and the machining performance is improved; and the mandrel and the planet carrier are prevented from rotating through the steel balls, so that the structure is stable and reliable.

Description

Planet carrier structure and novel NGW planetary reducer

Technical Field

The application relates to the technical field of speed reducers, in particular to a planet carrier structure and a novel NGW planet speed reducer.

Background

Currently, a planetary reducer is a mechanism that uses gears to perform speed conversion, decelerates the revolution number of a motor to a desired revolution number, and obtains a large torque. The planet carrier is one of main components of the planetary reducer, the sun gear, the planet gears, the bearings and the like are all arranged in the planet carrier, and the planet carrier is a part with the largest bearing external torque in the planetary reducer mechanism. The structural design and manufacture of the planet carrier has great influence on the load distribution between the sun gear and each planet gear, so that the bearing capacity, noise, vibration and the like of the transmission device are greatly influenced. The reasonable structure of the planet carrier is light in weight, good in rigidity, convenient to process and manufacture and stable in assembly.

In the related art, the existing planet carrier is a cylindrical shell structure with a certain height, a mounting hole for mounting a sun gear is formed in the center of the cylindrical shell structure, and a plurality of mounting vacancies capable of accommodating and mounting a plurality of planet gears are formed in the side end face of the cylindrical shell structure. The existing planet carrier is often formed by integral casting during processing and manufacturing.

However, when the planet carrier is integrally cast and formed, because of the structural characteristics of the planet carrier, the single-side die opening cannot be integrally formed, so that multiple loose cores are often needed, the whole processing and manufacturing difficulty of the planet carrier is high, and the processing period is long; meanwhile, after the integrated casting molding, the machining performance inside the planet carrier is poor, and the requirement of high-precision form and position tolerance is difficult to meet; in addition, the mandrel of the planetary reducer penetrates through the preformed hole of the planet carrier, but a rotation preventing structure is not shown, and under a high-speed operation condition, the mandrel can rotate relative to the planet carrier, so that the operation of the planetary reducer is not facilitated.

Disclosure of Invention

Aiming at the defects in the prior art, the application aims to provide a planet carrier structure and a novel NGW planetary reducer, wherein the planet carrier structure is manufactured in a split mode and welded, so that the processing difficulty is reduced, and the machining performance is improved; and the mandrel and the planet carrier are prevented from rotating through the steel balls, so that the structure is stable and reliable.

In order to achieve the above purpose, the technical scheme adopted is as follows: a planet carrier structure comprising:

the first planet carrier is in an annular plate shape, a plurality of first shaft holes are uniformly formed in the circumferential direction, and a plurality of clamping ports are uniformly formed in the first planet carrier along the edge of the first planet carrier;

the second planet carrier comprises a base plate which is in an annular plate shape, one side surface of the base plate is provided with a plurality of bearing platforms which are uniformly arranged along the circumferential direction at intervals, and gaps between two adjacent bearing platforms are used for accommodating and installing planet gears; the substrate is provided with second shaft holes in a vacancy between every two adjacent bearing platforms, and the first shaft holes and the second shaft holes are in one-to-one correspondence; the end face of each bearing platform far away from the substrate is provided with a clamping boss; the clamping interfaces of the first planet carrier are clamped and welded on the clamping bosses one by one.

On the basis of the technical scheme, the inner wall of the second shaft hole of the substrate is provided with the semicircular bead hole, and the semicircular bead hole is used for anti-rotation matching with the mandrel through the steel ball.

On the basis of the technical scheme, the first planet carrier is provided with a semicircular bead hole in the inner wall of the first shaft hole, and the semicircular bead hole is used for conducting anti-rotation matching with the mandrel through the steel balls.

The application discloses a novel NGW planetary reducer, which comprises a sun gear, a gear ring, a plurality of planetary gears, a plurality of mandrels and a planetary carrier structure; the sun gear is coaxially arranged in the center of the planet carrier structure, the planet gears are arranged in gaps between two adjacent bearing platforms, two ends of the mandrel are respectively inserted into the first shaft hole and the second shaft hole, and the plurality of planet gears are sleeved on the plurality of mandrels one by one; the gear ring wraps and accommodates a sun gear, a planet gear and a planet carrier structure, the gear ring is meshed with the planet gears, and the sun gear is meshed with all the planet gears.

On the basis of the technical scheme, a semicircular bead hole is formed in the inner wall of the second shaft hole of the substrate, two ends of the mandrel are in transition fit with the first shaft hole and the second shaft hole, the mandrel is provided with another semicircular bead hole, the two semicircular bead holes correspond, and the steel balls are accommodated in the two semicircular bead holes; the mandrel is in anti-rotation fit with the substrate through steel balls.

On the basis of the technical scheme, a semicircular bead hole is formed in the inner wall of the first shaft hole of the first planet carrier, two ends of the mandrel are in transition fit with the first shaft hole and the second shaft hole, the mandrel is provided with another semicircular bead hole, the two semicircular bead holes correspond, and the steel balls are accommodated in the two semicircular bead holes; the mandrel is in anti-rotation fit with the first planet carrier through steel balls.

On the basis of the technical scheme, the first planet carrier and the second planet carrier are matched coaxially, after the clamping interfaces of the first planet carrier are clamped and welded on the clamping bosses one by one, the clamping bosses are welded with L-shaped anti-falling structures, and the L-shaped anti-falling structures are used for hooking the first planet carrier.

On the basis of the technical scheme, the NGW planetary reducer further comprises a plurality of needle bearings, the needle bearings are sleeved on the mandrel, and the planet gears are sleeved on the needle bearings.

On the basis of the technical scheme, the NGW planetary reducer further comprises a plurality of antifriction gaskets, wherein the antifriction gaskets are arranged between the side end faces of the planetary gears and the base plate or between the side end faces of the planetary gears and the first planet carrier.

On the basis of the technical scheme, the inner hole of the sun gear is provided with a spline for energy input.

The technical scheme provided by the application has the beneficial effects that:

1. the planet carrier structure comprises a first planet carrier and a second planet carrier, wherein the first planet carrier is uniformly provided with a plurality of clamping interfaces along the edge of the first planet carrier. The second planet carrier comprises a base plate, a bearing platform and clamping bosses, the axes of the first planet carrier and the second planet carrier are overlapped, and the clamping interfaces of the first planet carrier are clamped and welded to the clamping bosses one by one. In the actual processing process, the first planet carrier and the second planet carrier are cast and molded respectively; and then the first planet carrier is clamped to the second planet carrier, and finally the clamping interface of the first planet carrier and the clamping boss are welded and fixed to form a whole.

The planet carrier structure is formed by split casting, and then is formed into a whole by welding, and the two split structures have good machining performance and welding performance, so that the manufacturing requirement of the planet speed reducer on high precision of the planet carrier form and position tolerance requirement is met. Compared with the whole integral casting molding in the prior art, the method greatly reduces the processing difficulty, shortens the processing and manufacturing period, and has good manufacturing and processing economy and good machining manufacturability.

2. According to the planet carrier structure, the semicircular ball holes are formed in the first planet carrier or the substrate, and the first planet carrier or the substrate is matched with the mandrel with the semicircular ball holes through the steel balls to perform anti-rotation fit, so that the mandrel can be effectively prevented from rotating relative to the planet carrier structure during operation of the planet carrier structure, and the working performance of the planet wheels is further affected.

3. According to the NGW planetary reducer, a planetary gear is arranged on a planetary carrier structure through a mandrel, a sun gear is arranged in the planetary carrier structure, and the sun gear is meshed with the planetary gear. The planet carrier structure can be used for connecting an output shaft to transmit torque, internal teeth are arranged on the inner circumferential surface of the gear ring and meshed with the planet gears, and splines are arranged on the outer circumferential surface of the gear ring and used for braking the brake. The NGW planetary reducer can better meet the requirements of speed reduction and torque increase of a new energy transmission, and has extremely high commercial value.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a planet carrier structure according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a first carrier according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of one side of a second planet carrier according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of another side of the second planet carrier according to the embodiment of the present application;

FIG. 5 is a schematic structural diagram of a mandrel according to an embodiment of the present application;

FIG. 6 is a cross-sectional view of an NGW planetary reducer provided by an embodiment of the application;

FIG. 7 is an enlarged view of a portion of FIG. 6A;

reference numerals: 1. a gear ring; 2. a planet wheel; 3. a sun gear; 4. a mandrel; 5. steel balls; 6. needle roller bearings; 7. an antifriction gasket; 8. a planet carrier structure; 81. a first planet carrier; 811. a card interface; 812. a first shaft hole; 82. a second carrier; 821. a substrate; 8211. a second shaft hole; 822. bearing platform; 823. and (5) clamping the boss.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. In addition, the technical features of the embodiments of the present application described below may be combined with each other as long as they do not collide with each other.

As shown in fig. 1 to 5, the present application discloses a planet carrier structure, which includes a first planet carrier 81 and a second planet carrier 82, wherein the first planet carrier 81 is in an annular plate structure, the first planet carrier 81 is uniformly provided with a plurality of first shaft holes 812 along the circumferential direction, that is, the first planet carrier 81 is uniformly provided with a plurality of first shaft holes 812 with an axis as a central axis at equal angles, and the first shaft holes 812 are used for penetrating through a mandrel 4; and the first carrier 81 is provided with a plurality of card interfaces 811 uniformly along its own edge.

The second carrier 82 includes a base plate 821 having an annular plate shape, a plurality of platforms 822 are provided on one side of the base plate 821 and are evenly arranged at intervals in the circumferential direction, gaps between two adjacent platforms 822 are used for accommodating and mounting the planet gears 2, and central gaps of all platforms 822 are used for accommodating and mounting the sun gears 3. The substrate 821 is provided with second shaft holes 8211 in a gap between every two adjacent bearing platforms 822, the first shaft holes 812 and the second shaft holes 8211 are in one-to-one correspondence, and the first shaft holes 812 and the second shaft holes 8211 are used for penetrating the mandrel 4. Each of the bearing platforms 822 is provided with a clamping boss 823 on an end surface far away from the base plate 821, and the clamping interfaces 811 of the first planet carrier 81 are clamped and welded to the clamping bosses 823 one by one.

Specifically, the axes of the first carrier 81 and the second carrier 82 coincide, and the first carrier 81 is disposed in parallel with respect to the base plate 821. In the actual machining process, the first planet carrier 81 and the second planet carrier 82 are cast and molded respectively; then the first planet carrier 81 is clamped with the second planet carrier 82, specifically, the clamping interfaces 811 of the first planet carrier 81 are clamped and welded with the clamping bosses 823 one by one; finally, the clamping interface 811 of the first planet carrier 81 and the clamping boss 823 are welded and fixed to form a whole.

The planet carrier structure of the application comprises a first planet carrier 81 and a second planet carrier 82, wherein the first planet carrier 81 is uniformly provided with a plurality of clamping interfaces 811 along the edge thereof. The second carrier 82 includes a base plate 821, a base plate 822, and a locking boss 823, and axes of the first carrier 81 and the second carrier 82 overlap each other, and the locking interfaces 811 of the first carrier 81 are locked and welded to the locking boss 823 one by one. In the actual machining process, the first planet carrier 81 and the second planet carrier 82 are cast and molded respectively; then, the first planet carrier 81 is clamped to the second planet carrier 82, and finally, the clamping interface 811 of the first planet carrier 81 and the clamping boss 823 are welded and fixed to form a whole. The planet carrier structure is formed by split casting, and then is formed into a whole by welding, and the two split structures have good machining performance and welding performance, so that the manufacturing requirement of the planet speed reducer on high precision of the planet carrier form and position tolerance requirement is met. Compared with the whole integral casting molding in the prior art, the method greatly reduces the processing difficulty, shortens the processing and manufacturing period, and has good manufacturing and processing economy and good machining manufacturability.

In one embodiment, the carrier structure includes a first carrier 81 and a second carrier 82, where the first carrier 81 is uniformly provided with a plurality of snap-fit interfaces 811 along its own edge. The second carrier 82 includes a base plate 821, a base plate 822, and a locking boss 823, and the locking interfaces 811 of the first carrier 81 are locked and welded to the locking boss 823 one by one. Based on the above technical solution, the inner wall of the second shaft hole 8211 of the base plate 821 is provided with a semicircular bead hole, and the semicircular bead hole is used for performing anti-rotation matching with the mandrel 4 through the steel ball 5. Specifically, the mandrel 4 is also provided with a semicircular bead hole at a corresponding position, and the mandrel 4 and the base plate 821 are in anti-rotation fit through the steel balls 5.

Through steel ball 5 anti-rotation structure, dabber 4 is spacing by steel ball 5 circumference, and dabber 4 can not rotate for the planet carrier structure, has realized preventing dabber 4 pivoted function, has promoted the job stabilization nature of whole planet wheel when the high-speed operation of planet carrier structure works.

In another embodiment, the planet carrier structure comprises a first planet carrier 81 and a second planet carrier 82, wherein the first planet carrier 81 is uniformly provided with a plurality of clamping interfaces 811 along the edge of the first planet carrier 81. The second carrier 82 includes a base plate 821, a base plate 822, and a locking boss 823, and the locking interfaces 811 of the first carrier 81 are locked and welded to the locking boss 823 one by one. On the basis of the above technical solution, the inner wall of the first planetary frame 81 in the first shaft hole 812 may be provided with a semicircular bead hole, and the semicircular bead hole is used for anti-rotation matching with the mandrel 4 through the steel ball 5. Specifically, the mandrel 4 is also provided with a semicircular ball hole at a corresponding position, and the mandrel 4 and the first planet carrier 81 are in anti-rotation fit through the steel balls 5.

Through the steel ball 5 anti-rotation structure, the mandrel 4 is limited by the steel ball 5 in the circumferential direction, the mandrel 4 cannot rotate relative to the first planet carrier 81, the function of preventing the mandrel 4 from rotating is achieved, and when the planet carrier structure works at a high speed, the working stability of the whole planet wheel is improved.

Specifically, a half ball hole may be formed in the inner wall of the second shaft hole 8211 of the base plate 821, or a half ball hole may be formed in the inner wall of the first shaft hole 812 of the first planet carrier 81, so long as the mandrel 4 is anti-rotatably engaged with the entire planet carrier structure through the steel balls 5.

According to the planet carrier structure, the semicircular ball holes are formed in the first planet carrier 81 or the base plate 821 and are matched with the mandrel 4 with the semicircular ball holes through the steel balls 5, so that anti-rotation matching is performed, and the mandrel 4 can be effectively prevented from rotating relatively to the planet carrier structure during operation of the planet carrier structure, and further the working performance of the planet wheels is affected.

In one embodiment, four bearing platforms 822 are arranged on one side surface of the substrate 821, the four bearing platforms 822 are uniformly distributed along the circumferential direction at equal angles, and one clamping boss 823 is arranged on the end surface of each bearing platform 822, and the four clamping bosses 823 are altogether arranged; similarly, the number of the first shaft holes 812, the number of the second shaft holes 8211, and the number of the planetary gears 2 are 4.

As shown in fig. 6 and 7, a novel NGW planetary reducer includes a sun gear 3, a ring gear 1, a plurality of planetary gears 2, a plurality of spindles 4, and the above-mentioned planetary carrier structure 8. The sun wheel 3 is coaxially arranged in the centre of the planet carrier structure 8 and the planet wheels 2 are arranged in the empty space between two adjacent bearing platforms 822. Two ends of the mandrel 4 are respectively inserted into the first shaft hole 812 and the second shaft hole 8211, the planetary gears 2 are sleeved and installed on the mandrel 4, and the planetary gears 2 are sleeved and installed on the mandrels 4 one by one. The ring gear 1 is wrapped to accommodate the sun gear 3, the planet gears 2 and the planet carrier structure 8, the ring gear 1 is meshed with the planet gears 2, and the sun gear 3 is meshed with all the planet gears 2.

According to the NGW planetary reducer, a planetary gear 2 is arranged on a planetary carrier structure 8 through a mandrel 4, a sun gear 3 is arranged in the planetary carrier structure 8, and the sun gear 3 is meshed with the planetary gear 2. The planet carrier structure 8 can be used for connecting an output shaft to transmit torque, internal teeth are arranged on the inner circumferential surface of the gear ring 1 and meshed with the planet gears 2, and splines are arranged on the outer circumferential surface of the gear ring 1 and used for braking a brake. The NGW planetary reducer can better meet the requirements of speed reduction and torque increase of a new energy transmission, and has extremely high commercial value.

In one embodiment, the novel NGW planetary reducer comprises a sun gear 3, a ring gear 1, a plurality of planet gears 2, a plurality of spindles 4, and the above-mentioned planet carrier structure 8. The sun wheel 3 is coaxially arranged in the centre of the planet carrier structure 8 and the planet wheels 2 are arranged in the empty space between two adjacent bearing platforms 822. On the basis of the above technical solution, the inner wall of the second shaft hole 8211 of the substrate 821 is provided with a half ball hole, two ends of the mandrel 4 are in transition fit with the first shaft hole 812 and the second shaft hole 8211, the mandrel 4 is provided with another half ball hole, the two half ball holes are corresponding, the steel ball 5 is accommodated in the two half ball holes, and the mandrel 4 is in anti-rotation fit with the substrate 821 through the steel ball 5. Through steel ball 5 anti-rotation structure, dabber 4 is spacing by steel ball 5 circumference, and dabber 4 can not rotate for the planet carrier structure, has realized preventing dabber 4 pivoted function, has promoted the job stabilization nature of whole planet wheel when the high-speed operation of planet carrier structure works.

Preferably, the mandrel 4 is assembled in the first shaft hole 812 and the second shaft hole 8211 of the planet carrier structure through transition fit, the diameter of the semicircular bead hole of the mandrel 4 is 0.2mm larger than that of the steel ball 5, and the depth of the semicircular bead hole of the mandrel 4 is half of that of the steel ball 5; the inner wall of the second shaft hole 8211 of the base plate 821 is also provided with a semicircular bead hole, the diameter of which is 0.2mm larger than that of the steel ball 5, and the depth of which is half of that of the steel ball 5.

In another embodiment, the novel NGW planetary reducer comprises a sun gear 3, a ring gear 1, a plurality of planet gears 2, a plurality of spindles 4, and the above-mentioned planet carrier structure 8. The sun wheel 3 is coaxially arranged in the centre of the planet carrier structure 8 and the planet wheels 2 are arranged in the empty space between two adjacent bearing platforms 822. On the basis of the above technical solution, the first planet carrier 81 is provided with a half ball hole on the inner wall of the first shaft hole 812, two ends of the mandrel 4 are in transition fit with the first shaft hole 812 and the second shaft hole 8211, the mandrel 4 is provided with another half ball hole, the two half ball holes correspond to each other, and the steel balls 5 are accommodated in the two half ball holes; the mandrel 4 is anti-rotatably fitted to the first planet carrier 81 by means of the steel balls 5.

Through the steel ball 5 anti-rotation structure, the mandrel 4 is limited by the steel ball 5 in the circumferential direction, the mandrel 4 cannot rotate relative to the first planet carrier 81, the function of preventing the mandrel 4 from rotating is achieved, and when the planet carrier structure works at a high speed, the working stability of the whole planet wheel is improved.

Specifically, a half ball hole may be formed in the inner wall of the second shaft hole 8211 of the base plate 821, or a half ball hole may be formed in the inner wall of the first shaft hole 812 of the first planet carrier 81, so long as the mandrel 4 is anti-rotatably engaged with the entire planet carrier structure through the steel balls 5.

According to the NGW planetary reducer, the semicircular ball holes are formed in the first planet carrier 81 or the substrate 821, and are matched with the mandrel 4 with the semicircular ball holes through the steel balls 5, so that anti-rotation matching is performed, and the mandrel 4 can be effectively prevented from rotating relatively to the planet carrier structure during operation of the planet carrier structure, and further the working performance of the planet wheels is affected.

Preferably, a lightweight cavity is arranged in the mandrel 4, so that the weight of the mandrel 4 can be reduced, and more weight allowance is reserved for the whole vehicle design.

Regarding the NGW planetary reducer, in one embodiment, four bearing platforms 822 are disposed on a side surface of the substrate 821, the four bearing platforms 822 are uniformly distributed along the circumferential direction at equal angles, and one clamping boss 823 is disposed on an end surface of each bearing platform 822, and the four clamping bosses 823 are altogether disposed; similarly, the number of the first shaft holes 812, the number of the second shaft holes 8211, and the number of the planetary gears 2 are 4.

In one embodiment, the novel NGW planetary reducer comprises a sun gear 3, a ring gear 1, a plurality of planet gears 2, a plurality of spindles 4, and the above-mentioned planet carrier structure 8. The sun wheel 3 is coaxially arranged in the centre of the planet carrier structure 8 and the planet wheels 2 are arranged in the empty space between two adjacent bearing platforms 822. On the basis of the above technical solution, the first planet carrier 81 and the second planet carrier 82 are coaxially matched, after the clamping interfaces 811 of the first planet carrier 81 are clamped and welded on the clamping bosses 823 one by one, the clamping bosses 823 are welded with an L-shaped anti-falling structure, and the L-shaped anti-falling structure is used for hooking the first planet carrier 81. The L-shaped drop-off preventing structure further enhances the connection stability of the first carrier 81 and the second carrier 82.

According to the NGW planetary reducer, the planetary carrier structure is manufactured separately and then welded, so that the processing difficulty is reduced, and the machining performance is improved; and the mandrel and the planet carrier are prevented from rotating through the steel balls, so that the structure is stable and reliable.

In one embodiment, the novel NGW planetary reducer comprises a sun gear 3, a ring gear 1, a plurality of planet gears 2, a plurality of spindles 4, and the above-mentioned planet carrier structure 8. The sun wheel 3 is coaxially arranged in the centre of the planet carrier structure 8 and the planet wheels 2 are arranged in the empty space between two adjacent bearing platforms 822. As shown in fig. 6, on the basis of the above technical solution, the NGW planetary reducer further includes a plurality of needle bearings 6, the needle bearings 6 are sleeved on the mandrel 4, and the planet gears 2 are sleeved on the needle bearings 6. In particular, the planet wheel 2 is connected to the spindle 4 by means of a needle bearing 6.

In one embodiment, the novel NGW planetary reducer comprises a sun gear 3, a ring gear 1, a plurality of planet gears 2, a plurality of spindles 4, and the above-mentioned planet carrier structure 8. The sun wheel 3 is coaxially arranged in the centre of the planet carrier structure 8 and the planet wheels 2 are arranged in the empty space between two adjacent bearing platforms 822. As shown in fig. 6, on the basis of the above technical solution, the NGW planetary reducer further includes a plurality of antifriction shims 7, and the antifriction shims 7 are disposed between the side end face of the planet wheel 2 and the base plate 821 or between the side end face of the planet wheel 2 and the first planet carrier 81. Specifically, the antifriction shims 7 are provided on both side end surfaces of each planet wheel 2, and the planet wheels 2 are separated from the first planet carrier 81 and the second planet carrier 82 by the antifriction shims 7.

Further, the inner hole of the sun gear 3 is provided with a spline for energy input as an input of the NGW planetary reducer.

The NGW planetary reducer is applied to the field of new energy gearboxes, and the planetary carrier structure of the planetary reducer is welded and fixed after being separately processed, so that compared with the integral casting molding of the planetary carrier structure in the prior art, the planetary reducer has the advantages of greatly reduced processing difficulty, good machining performance and high processing precision, can better and more quickly meet the reduction ratio, torque increase and control requirements of the new energy gearboxes, and has extremely high commercial value for development of the new energy gearboxes.

Compared with the prior art, the mandrel 4 of the NGW planetary reducer is provided with the anti-rotation steel ball 5, and under the high-speed operation condition, the mandrel still cannot rotate relative to the planet carrier, so that the working performance of the NGW planetary reducer is enhanced, and the service life of the planetary reducer is prolonged.

In a specific embodiment, the reduction ratio of the NGW speed reducer needs to be designed to be 3.27, and the maximum input power is 220kw; when the prior art scheme is adopted for design and manufacture, the result cannot be directly achieved, and the requirement can be met only by carefully correcting the planet carrier for a long time after the planet carrier is machined.

The carrier of the NGW planetary reducer has good machining performance, can be machined into a required carrier at one time, and does not need correction machining.

Specifically, the above target requirements can be met by designing gear parameters of the sun gear 3, the planet gear 2 and the gear ring 1, and the gear key parameter design is shown in table 1.

Table 1 gear parameter table

The planet carriers adopt a split welding structure, wherein the first planet carrier 81 is designed with a clamping interface 811, and the second planet carrier 82 is designed with a clamping boss 823.

Before welding, first, the first carrier 81 and the second carrier 82 are assembled together, and the clamping boss 823 and the clamping interface 811 are fitted with a small clearance.

During welding, welding fusion is carried out at the matching position of the clamping boss 823 and the clamping interface 811, the structure can ensure that the welding manufacturability of the planet carrier is good, the welding strength is high, the manufacturing and processing requirements of the planet carrier are met, and the processing difficulty is reduced.

The planet carrier structure of the application comprises a first planet carrier 81 and a second planet carrier 82, wherein the first planet carrier 81 is uniformly provided with a plurality of clamping interfaces 811 along the edge thereof. The second carrier 82 includes a base plate 821, a base plate 822, and a locking boss 823, and axes of the first carrier 81 and the second carrier 82 overlap each other, and the locking interfaces 811 of the first carrier 81 are locked and welded to the locking boss 823 one by one. In the actual machining process, the first planet carrier 81 and the second planet carrier 82 are cast and molded respectively; then, the first planet carrier 81 is clamped to the second planet carrier 82, and finally, the clamping interface 811 of the first planet carrier 81 and the clamping boss 823 are welded and fixed to form a whole.

The planet carrier structure is formed by split casting, and then is formed into a whole by welding, and the two split structures have good machining performance and welding performance, so that the manufacturing requirement of the planet speed reducer on high precision of the planet carrier form and position tolerance requirement is met. Compared with the whole integral casting molding in the prior art, the method greatly reduces the processing difficulty, shortens the processing and manufacturing period, and has good manufacturing and processing economy and good machining manufacturability.

According to the planet carrier structure, the semicircular ball holes are formed in the first planet carrier 81 or the base plate 821 and are matched with the mandrel 4 with the semicircular ball holes through the steel balls 5, so that anti-rotation matching is performed, and the mandrel 4 can be effectively prevented from rotating relatively to the planet carrier structure during operation of the planet carrier structure, and further the working performance of the planet wheels is affected.

According to the NGW planetary reducer, a planetary gear 2 is arranged on a planetary carrier structure 8 through a mandrel 4, a sun gear 3 is arranged in the planetary carrier structure 8, and the sun gear 3 is meshed with the planetary gear 2. The planet carrier structure 8 can be used for connecting an output shaft to transmit torque, internal teeth are arranged on the inner circumferential surface of the gear ring 1 and meshed with the planet gears 2, and splines are arranged on the outer circumferential surface of the gear ring 1 and used for braking a brake. The NGW planetary reducer can better meet the requirements of speed reduction and torque increase of a new energy transmission, and has extremely high commercial value.

In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that in the present application, relational terms such as "first" and "second" and the like are 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. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. 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 application. Thus, the present application 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. A planet carrier structure comprising:

the first planet carrier (81) is in an annular plate shape, a plurality of first shaft holes (812) are uniformly formed in the circumferential direction, and a plurality of clamping ports (811) are uniformly formed in the first planet carrier (81) along the edge of the first planet carrier;

a second carrier (82) which comprises a base plate (821) in the shape of an annular plate, wherein a plurality of bearing platforms (822) which are uniformly arranged along the circumferential direction are arranged on one side surface of the base plate (821), and gaps between two adjacent bearing platforms (822) are used for accommodating and installing the planet gears (2); the substrate (821) is provided with second shaft holes (8211) in a vacancy between every two adjacent bearing platforms (822), and the first shaft holes (812) and the second shaft holes (8211) are in one-to-one correspondence; the end face of each bearing platform (822) far away from the base plate (821) is provided with a clamping boss (823); the clamping interfaces (811) of the first planet carrier (81) are clamped and welded on the clamping boss (823) one by one.

2. A planet carrier structure as claimed in claim 1, wherein: the inner wall of the second shaft hole (8211) of the base plate (821) is provided with a semicircular bead hole, and the semicircular bead hole is used for being matched with the mandrel (4) in an anti-rotation mode through the steel ball (5).

3. A planet carrier structure as claimed in claim 1, wherein: the inner wall of the first planet carrier (81) is provided with a semicircular bead hole, and the semicircular bead hole is used for conducting anti-rotation matching with the mandrel (4) through the steel ball (5).

4. A novel NGW planetary reducer characterized by comprising a sun gear (3), a gear ring (1), a plurality of planetary gears (2), a plurality of spindles (4), and a planet carrier structure (8) according to claim 1; the sun gear (3) is coaxially arranged in the center of the planet carrier structure (8), the planet gears (2) are arranged in gaps between two adjacent bearing platforms (822), two ends of the mandrel (4) are respectively inserted into the first shaft hole (812) and the second shaft hole (8211), and the plurality of planet gears (2) are sleeved on the plurality of mandrels (4) one by one; the gear ring (1) wraps and accommodates the sun gear (3), the planet gears (2) and the planet carrier structure (8), the gear ring (1) is meshed with the planet gears (2), and the sun gear (3) is meshed with all the planet gears (2).

5. The novel NGW planetary reducer of claim 4, wherein: the substrate (821) is provided with a semicircular bead hole on the inner wall of the second shaft hole (8211), two ends of the mandrel (4) are in transition fit with the first shaft hole (812) and the second shaft hole (8211), the mandrel (4) is provided with another semicircular bead hole, the two semicircular bead holes are corresponding, and the steel balls (5) are accommodated in the two semicircular bead holes; the mandrel (4) is in anti-rotation fit with the base plate (821) through a steel ball (5).

6. The novel NGW planetary reducer of claim 4, wherein: the first planet carrier (81) is provided with a semicircular bead hole on the inner wall of a first shaft hole (812), two ends of the mandrel (4) are in transition fit with the first shaft hole (812) and a second shaft hole (8211), the mandrel (4) is provided with another semicircular bead hole, the two semicircular bead holes correspond to each other, and the steel balls (5) are accommodated in the two semicircular bead holes; the mandrel (4) is in anti-rotation fit with the first planet carrier (81) through steel balls (5).

7. The novel NGW planetary reducer of claim 4, wherein:

the first planet carrier (81) and the second planet carrier (82) are matched coaxially, after the clamping interfaces (811) of the first planet carrier (81) are clamped and welded to the clamping bosses (823) one by one, the clamping bosses (823) are welded with L-shaped anti-falling structures, and the L-shaped anti-falling structures are used for hooking the first planet carrier (81).

8. The novel NGW planetary reducer of claim 4, wherein: the NGW planetary reducer further comprises a plurality of needle bearings (6), the needle bearings (6) are sleeved on the mandrel (4), and the planet gears (2) are sleeved on the needle bearings (6).

9. The novel NGW planetary reducer of claim 4, wherein: the NGW planetary reducer further comprises a plurality of antifriction gaskets (7), wherein the antifriction gaskets (7) are arranged between the side end faces of the planetary gears (2) and the base plate (821) or between the side end faces of the planetary gears (2) and the first planet carrier (81).

10. The novel NGW planetary reducer of claim 5, wherein:

the inner hole of the sun gear (3) is provided with a spline for energy input.