阅读说明：本技术 行星齿轮减速机的行星架和行星架组装方法 (Planet carrier of planetary gear reducer and planet carrier assembling method ) 是由 屠科慧 奚尧舜 于 2020-07-10 设计创作，主要内容包括：本发明公开了一种行星齿轮减速机的行星架,包括一半盘和二半盘,一半盘和二半盘之间设有限位架,限位架与一半盘固定,限位架一端设有插接板,插接板中部设有紧固口,二半盘设有滑动槽和插接槽,滑动槽内设有紧固装置,插接槽贯穿二半盘并通入滑动槽中部；当插接板插入至插接槽内时,紧固口对准滑动槽处于,紧固装置穿过紧固口插入至滑动槽内；紧固装置包括壳体、配重件和紧固斜面,紧固斜面位于壳体表面。利用紧固装置的配重件,在行星架高速旋转时,对配重件施加离心力,使得离心力牵拉紧固装置,使紧固斜面较厚的一端挤压至紧固口,从而使得插接板在转速越高时,越能提供更大的挤压力,使得行星架的两个半盘挤压的更紧。(The invention discloses a planet carrier of a planetary gear speed reducer, which comprises a half disc and a half disc, wherein a limiting frame is arranged between the half disc and is fixed with the half disc; when the inserting plate is inserted into the inserting groove, the fastening port is aligned with the sliding groove, and the fastening device is inserted into the sliding groove through the fastening port; the fastening device comprises a shell, a weight piece and a fastening inclined plane, wherein the fastening inclined plane is positioned on the surface of the shell. Utilize fastener's counterweight, when the planet carrier is high-speed rotatory, exert centrifugal force to the counterweight for centrifugal force tractive fastener makes the thicker one end of fastening inclined plane extrude to the fastening mouth, thereby makes the plugboard when the rotational speed is higher, can provide bigger extrusion force more, makes two half-disk extrudees of planet carrier tighter.)

1. The utility model provides a planet carrier of planetary gear speed reducer, includes half a set (1) and half two sets (2), is equipped with spacing (10) between half a set (1) and half two sets (2), spacing (10) are fixed with half a set (1), and spacing (10) other end can be dismantled with half two sets (2) and be connected its characterized in that: one end of the limiting frame (10) facing the two half discs (2) is provided with an inserting plate (11), the middle part of the inserting plate (11) is provided with a fastening port (12),

the two half discs (2) are provided with sliding grooves (20) and inserting grooves (21), the sliding grooves (20) are positioned on the surfaces, back to the first half disc (1), of the two half discs (2), fastening devices (3) are arranged in the sliding grooves (20), the inserting grooves (21) penetrate through the two half discs (2) and are communicated with the middle parts of the sliding grooves (20), and the inserting grooves (21) correspond to the inserting plates (11);

when the plug board (11) is inserted into the plug groove (21), the fastening opening (12) is aligned with the sliding groove (20), and the fastening device (3) is inserted into the sliding groove (20) through the fastening opening (12);

the fastening device (3) comprises a shell (35), a weight piece (31) and a fastening inclined plane (30), the fastening inclined plane (30) faces to one side surface of the fastening port (12) back to the two half discs (2), the fastening inclined plane (30) is located on the surface of the shell (35), and the thickness of the inner end of the fastening inclined plane (30) is larger than that of the outer end of the fastening inclined plane; when the planet carrier rotates at a high speed, centrifugal force is generated on the fastening device (3), the fastening device (3) moves outwards along the sliding groove (20) along with the counterweight piece (31), the thickness of a fastening inclined plane (30) below the fastening port (12) is continuously thickened when the fastening device (3) moves outwards, the plugboard (11) further moves towards the side of the two half discs (2), and the two half discs (2) are further attached to the limiting frame (10).

2. The carrier of a planetary gear reducer as claimed in claim 1, wherein: the limiting structure for preventing the fastening device (3) from moving towards the inner side of the sliding groove (20) is arranged at the bottom of the sliding groove (20), the limiting structure comprises a threaded hole (22) and a limiting bolt (23), and the limiting bolt (23) penetrates through the threaded hole (22) to abut against the end face of the inner side of the fastening device (3).

3. The carrier of a planetary gear reducer as claimed in claim 1, wherein: the fastening device (3) further comprises a telescopic rod (32), a fastening spring (34) and a limiting part (33), the telescopic rod (32), the fastening spring (34) and the limiting part (33) are all located inside the shell (35), two ends of the telescopic rod (32) are connected with the weight part (31) and the limiting part (33) respectively, and the surface of the telescopic rod (32) is sleeved with the fastening spring (34).

4. The carrier of a planetary gear reducer as claimed in claim 3, wherein: the weight piece (31) is a roller, and the middle part of the weight piece (31) is pivoted at the end part of the telescopic rod (32).

5. The carrier of a planetary gear reducer as claimed in claim 4, wherein: the weight member (31) is made of a metal having a hardness less than that of steel.

6. The carrier of a planetary gear reducer as claimed in claim 5, wherein: the weight member (31) is made of copper.

7. The carrier of a planetary gear reducer as claimed in claim 1, wherein: the surface of the two half discs (2) is also provided with a counterweight groove (13), a fastening device (3) is arranged in the counterweight groove (13), the fastening device (3) in the counterweight groove (13) has the same structure as the fastening device (3) in the sliding groove (20), the surface of the counterweight groove (13) is provided with a fixing plate (14), and the fixing plate (14) compresses and fixes the fastening device (3) in the counterweight groove (13).

8. A method of assembling a planet carrier for a planetary gear reducer, comprising the planet carrier of claims 1-9, comprising the steps of:

1) and (3) machining: preparing a first half disc (1) and a second half disc (2) by casting and forging, and then forming a sliding groove (20), an inserting groove (21) and a fastening opening (12) on the surfaces of the first half disc (1) and the second half disc (2) through a machining center;

2) adjusting the fastening angle: polishing the contact position of the fastening opening (12) and the fastening inclined plane (30), wherein the contact surface of the fastening opening (12) is parallel to the fastening inclined plane (30), and the contact surface of the fastening opening (12) and the fastening inclined plane (30) are inclined for 1-2 degrees relative to the surface;

3) butting the planet carriers: the inserting plate (11) is inserted into the inserting groove (21) to align the sliding groove (20) and the fastening port (12);

4) and (3) low-temperature assembly: placing the planet carrier and the fastening device (3) in an environment at the temperature of-35 ℃, standing for 10h, and inserting the fastening device (3) into the sliding groove (20) through the fastening opening (12) after the workpiece is shrunk;

5) and (3) temperature return test: placing the assembled planet carrier in a normal temperature environment, standing for 10 hours, pulling the fastening device (3) outwards, and checking the moving distance of the fastening device (3);

6) fastening and limiting: and penetrating the limiting bolt (23) from the threaded hole (22) so that the limiting bolt (23) tightly props against the inner end of the fastening device (3).

Technical Field

The invention relates to a planetary gear reducer, in particular to a planet carrier of the planetary gear reducer and an assembling method of the planet carrier.

Background

Planetary gear reducers, also known as planetary reducers, servo reducers. In the reducer family, the planetary reducer is widely applied to transmission systems such as servo motors, stepping motors, direct current motors and the like due to the advantages of small size, high transmission efficiency, wide reduction range, high precision and the like. The function of the device is mainly used for reducing the rotating speed, increasing the torque and reducing the rotational inertia ratio of the load/the motor on the premise of ensuring the precision transmission. A large number of planetary gear reducers are used as matching parts in the industries of hoisting, digging, transportation, building and the like.

As shown in fig. 13, the planetary gear reducer includes a planetary carrier, the planetary carrier is composed of a first half disc 1 ' and a second half disc 2 ', a limiting frame 10 ' is disposed between the first half disc 1 ' and the second half disc 2 ', the limiting frame 10 ' and the first half disc 1 ' are integrally formed, and the limiting frame 10 ' and the second half disc 2 ' are finally fixed by a positioning pin 6 ' and a bolt 4 ' to ensure that the first half disc 1 ' and the second half disc 2 ' rotate synchronously.

The existing connection mode of the planet carrier is that a butt joint hole and a threaded hole are formed in a limiting frame 10 ' and a second half disc 2 ', a positioning pin 6 ' is inserted between the second half disc 2 ' and the limiting frame 10 ', a pressing plate 5 ' is covered at the outer end of the positioning pin 6 ', and finally the pressing plate 5 ' is firmly pressed on the surface of the second half disc 2 ' by screwing a bolt 4 ' so as to prevent the positioning pin 6 ' from being separated.

Therefore, the mechanical fixing mode has the following defects:

1. in the permanent use of speed reducer, because the vibration of speed reducer, constantly produce deformation between bolt 4 'and the place screw hole for bolt 4' is difficult to firmly fix, makes the clearance appear between spacing 10 'and the two half dishes 2', and the rotatory vibration and the noise of existence of planet carrier when the speed reducer moves.

2. Because the bolt 4 ' has the risk of breaking away from, consequently clamp plate 5 ' is difficult to continuous compress tightly at two half dish 2 ' surfaces, once produce the clearance between bolt 4 ' and the clamp plate 5 ', clamp plate 5 ' can produce the skew rotation around bolt 4 ', leads to locating pin 6 ' outer end to lose spacing to make spacing 10 ' lack the spacing and separate of locating pin 6 ' with two half dish 2 ', consequently have certain potential safety hazard.

3. When the rotation speed is higher, the vibration frequency of the planet carrier is higher, and if a gap exists between the two half discs, the generated noise is higher.

Disclosure of Invention

The invention aims to provide a planet carrier of a planetary gear speed reducer and a planet carrier assembling method, wherein a counterweight of a fastening device is utilized, when the planet carrier rotates at a high speed, centrifugal force is applied to the counterweight, the centrifugal force pulls the fastening device, and the thicker end of a fastening inclined plane is extruded to a fastening port, so that a higher extrusion force can be provided when the rotating speed of a plug board is higher, and the two half discs of the planet carrier are extruded more tightly.

In order to realize the purpose of the invention, the invention adopts the following technical scheme: a planet carrier of a planetary gear speed reducer comprises a half disc and a half disc, wherein a limiting frame is arranged between the half disc and the half disc, the limiting frame is fixed with the half disc, the other end of the limiting frame is detachably connected with the half disc, one end, facing the half disc, of the limiting frame is provided with an inserting plate, the middle part of the inserting plate is provided with a fastening port, the half disc is provided with a sliding groove and an inserting groove, the sliding groove is positioned on the surface, back to the half disc, of the half disc, a fastening device is arranged in the sliding groove, the inserting groove penetrates through the half disc and is introduced into the middle part of the sliding groove, and the position of the inserting groove corresponds to that of the inserting plate; when the inserting plate is inserted into the inserting groove, the fastening opening is aligned with the sliding groove, and the fastening device penetrates through the fastening opening and is inserted into the sliding groove; the fastening device comprises a shell, a counterweight and a fastening inclined plane, the fastening inclined plane faces to the surface of one side, back to the two half discs, of the fastening port, the fastening inclined plane is located on the surface of the shell, and the thickness of the inner end of the fastening inclined plane is larger than that of the outer end of the fastening inclined plane; when the planet carrier rotates at a high speed, centrifugal force is generated on the fastening device, the fastening device moves outwards along the sliding groove along with the counterweight, the thickness of a fastening inclined plane below the fastening port is continuously thickened when the fastening device moves outwards, the plugboard further moves towards the side of the two half discs, and the two half discs are further attached to the limiting frame.

Preferably, the bottom of the sliding groove is provided with a limiting structure for preventing the fastening device from moving towards the inner side of the sliding groove, the limiting structure comprises a threaded hole and a limiting bolt, and the limiting bolt penetrates through the threaded hole to abut against the end face of the inner side of the fastening device.

Preferably, the fastening device further comprises a telescopic rod, a fastening spring and a limiting part, the telescopic rod, the fastening spring and the limiting part are all located inside the shell, two ends of the telescopic rod are respectively connected with the counterweight part and the limiting part, and the surface of the telescopic rod is sleeved with the fastening spring.

Preferably, the weight member is a roller, and the middle part of the weight member is pivoted to the end part of the telescopic rod.

Preferably, the weight member is made of a metal having a hardness less than steel.

Preferably, the weight member is made of copper.

Preferably, the surfaces of the two half plates are also provided with counterweight grooves, fastening devices are arranged in the counterweight grooves, the structures of the fastening devices in the counterweight grooves are the same as those of the fastening devices in the sliding grooves, and the surfaces of the counterweight grooves are provided with fixing plates which are compressed and fix the fastening devices in the counterweight grooves.

Compared with the prior art, the planet carrier of the planetary gear speed reducer adopting the technical scheme has the following beneficial effects:

firstly, by adopting the planet carrier, the rotation of the planet carrier can generate centrifugal force towards the outer peripheral side on the weight part of the fastening device, so that the fastening device is pulled and displaced towards the outer peripheral side; the fastening inclined plane through the fastening device exerts pulling force to the fishplate bar to make two half dishes firmly compress tightly on spacing, when the planet carrier is along with the high-speed rotation of speed reducer, the rotational speed is higher, and half dish and two half dishes are pressed and are got tighter.

In the invention, threaded fasteners such as bolts and the like are eliminated, so that even if the speed reducer is influenced by vibration, looseness and deviation between the fastening opening and the fastening inclined plane can not be generated, and vibration and noise generated when the planet carrier rotates are effectively avoided.

And in the rotation process, along with the increase of the rotating speed, the linear speed of the fastening device is continuously increased, the centrifugal force of the weight part is increased and tends to move towards the edge of the planet carrier, so that the fastening inclined plane moves outwards, the thickness of the fastening inclined plane abutted to the fastening port is continuously increased, the first half disc and the second half disc are pressed more tightly at a high rotating speed, namely the rotating speed is pressed more tightly, and the vibration and the noise during high-speed rotation are effectively reduced.

The invention also discloses an assembly method of the planet carrier, which comprises the following steps:

1) and (3) machining: preparing a first half disc and a second half disc by casting and forging, and forming a sliding groove, an inserting groove and a fastening opening on the surfaces of the first half disc and the second half disc through a machining center;

2) adjusting the fastening angle: polishing the contact position of the fastening port and the fastening inclined plane, wherein the contact surface of the fastening port is parallel to the fastening inclined plane, and the contact surface of the fastening port and the fastening inclined plane are inclined by 1-2 degrees relative to the surface;

3) butting the planet carriers: the inserting plate is inserted into the inserting groove to align the sliding groove with the fastening port;

4) and (3) low-temperature assembly: placing the planet carrier and the fastening device in an environment at the temperature of-35 ℃, standing for 10 hours, and inserting the fastening device into the sliding groove through the fastening opening after the workpiece is shrunk;

5) and (3) temperature return test: placing the assembled planet carrier in a normal temperature environment, standing for 10 hours, pulling the fastening device outwards, and checking the moving distance of the fastening device;

6) fastening and limiting: and penetrating the limiting bolt into the threaded hole so that the limiting bolt tightly jacks the inner end of the fastening device.

Through the assembling method, the planet carrier is assembled, and in the assembling process, due to the adoption of a low-temperature assembling mode, the size of the planet carrier is reduced by utilizing the cold shrinkage of a workpiece, so that the thicker end of the fastening inclined plane is firstly plugged into the fastening opening.

Drawings

Fig. 1 is a schematic view of a planetary carrier applied to a planetary gear reducer according to the present invention.

Fig. 2 is a schematic structural diagram of a carrier of the planetary gear reducer in the embodiment.

FIG. 3 is a schematic structural diagram of a planet carrier in an embodiment.

FIG. 4 is a schematic view of the connection between the socket plate and the socket according to the embodiment.

Fig. 5 is a schematic view showing the connection of the fastening port and the fastening device in the embodiment.

Fig. 6 is a sectional view of a fastening port and a fastening device in an embodiment.

FIG. 7 is a schematic structural diagram of a planet carrier in an embodiment.

Fig. 8 is a partial enlarged view of a portion a in fig. 7.

Fig. 9 is a schematic structural view of a fastening device in an embodiment.

Fig. 10 is a sectional view of the fastening device in the embodiment.

Fig. 11 is a sectional view (stretched state) of the fastening device in the embodiment.

FIG. 12 is a schematic structural diagram of a planet carrier in an embodiment.

Fig. 13 is a schematic structural diagram of a planetary gear reducer in the prior art.

Fig. 14 is a schematic structural view of a planetary gear reducer in the prior art.

Fig. 15 is a schematic structural view of a planetary gear reducer in the prior art.

Reference numerals: 1. a half disc; 10. a limiting frame; 11. a plugboard; 12. a fastening opening; 13. a counterweight groove; 14. a fixing plate; 2. two half discs; 20. a sliding groove; 21. inserting grooves; 22. a threaded hole; 23. a limit bolt; 3. a fastening device; 30. fastening the inclined plane; 31. a counterweight; 32. a telescopic rod; 33. a limiting member; 34. a fastening spring; 35. a housing.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

The planet carrier of the planetary gear reducer shown in fig. 1 to 12 comprises a half disc 1 and a half disc 2, a limiting frame 10 is arranged between the half disc 1 and the half disc 2, the limiting frame 10 is fixed with the half disc 1, and the other end of the limiting frame 10 is detachably connected with the half disc 2.

As shown in fig. 3, one end of the limiting frame 10 facing the second half disc 2 is provided with an inserting plate 11, the middle of the inserting plate 11 is provided with a fastening port 12, the second half disc 2 is provided with a sliding groove 20 and an inserting groove 21, the sliding groove 20 is positioned on the surface of the second half disc 2 back to the first half disc 1, the sliding groove 20 is internally provided with a fastening device 3, the inserting groove 21 penetrates through the second half disc 2 and is communicated with the middle of the sliding groove 20, and the position of the inserting groove 21 corresponds to the inserting plate 11. Referring to fig. 5 and 6, when the insertion plate 11 is inserted into the insertion slot 21, the fastening opening 12 is aligned with the sliding slot 20, and the fastening device 3 is inserted into the sliding slot 20 through the fastening opening 12.

As shown in fig. 6, the fastening device 3 comprises a housing 35, a weight member 31 and a fastening inclined surface 30, the fastening inclined surface 30 faces to one side surface of the fastening port 12 opposite to the two half discs 2, the fastening inclined surface 30 is positioned on the surface of the housing 35, and the thickness of the inner end of the fastening inclined surface 30 is larger than that of the outer end.

When the planet carrier rotates at a high speed, the planet carrier generates centrifugal force to the fastening device 3 (the fastening device 6 is subjected to rightward centrifugal force in fig. 6), the fastening device 3 moves along the outer periphery of the sliding groove 20 along with the counterweight 31, the thickness of the fastening inclined plane 30 below the fastening port 12 is continuously increased when the fastening device 3 moves outwards, and the plugboard 11 further moves towards the side of the two half discs 2, so that the two half discs 2 are further attached to the limiting frame 10, the two half discs are firmly attached and fixed, and the connection mode of screwing the bolts is replaced.

As shown in fig. 9, the fastening device 3 further includes an expansion link 32, a fastening spring 34 and a limiting member 33, the expansion link 32, the fastening spring 34 and the limiting member 33 are all located inside the housing 35, two ends of the expansion link 32 are respectively connected with the counterweight 31 and the limiting member 33, and the fastening spring 34 is sleeved on a surface of the expansion link 32. Before the planet carrier rotates or rotates at a low speed, the counterweight 31 is not stressed, the counterweight 31 is under the action of the elastic force of the spring 34 and is positioned at the position shown in the figure 10, when the planet carrier rotates at the low speed, drivers (an engine, a motor and the like) are all at lower power, the counterweight 31 has shorter moving distance, the load of a speed reducer can be reduced, the power is smaller, and meanwhile, the generated shaking and vibration are also smaller.

When the planet carrier rotates at a higher rotation speed, the centrifugal force received by the weight 31 is greater than the elastic force of the spring 34, the weight 31 starts to move relative to the housing 35, the weight 31 moves to a position farther from the rotation center, and under the condition of unchanged angular velocity, the position farther from the rotation center is a higher linear velocity, and the generated centrifugal force is also higher, so that when the planet carrier rotates at a high speed, after the weight 31 is far from the rotation center, the pulling force of the weight 31 on the fastening device 3 becomes greater, and a higher clamping force is provided for the planet carrier.

When the planet carrier rotates at a low speed, the counterweight 31 is closer to the rotation center, the power and the load are smaller, the whole speed reducer shakes less, and the noise is lower. When the planet carrier rotates at a high speed, the distance from the counterweight 31 to the rotation center is increased, larger pulling force is provided, and the planet carrier is ensured to have stable connection.

The weight member 31 is a roller, and the middle part of the weight member 31 is pivoted to the end part of the telescopic rod 32. The weight member 31 moves along with the rotation speed of the planet carrier, when the weight member 31 is thrown to the maximum distance, if the fastening device 3 is connected with the fastening port 121 to be loosened or damaged, the weight member 31 can contact the inner wall of the speed reducer cylinder body (see fig. 1), and the weight member 31 adopts a roller structure, so that the weight member 31 can be effectively prevented from scraping the inner wall of the speed reducer cylinder body.

The weight 31 is made of copper, the cylinder body is generally made of steel, and the hardness of the weight 31 is reduced to protect the inner wall of the cylinder body and prevent scratches or damages. Simultaneously, the counterweight 31 can produce larger friction noise when striking the inner wall of the cylinder body, so that an operator is warned in a noise scraping mode, the speed reducer is prompted to be damaged, and the planet carrier can be inspected by opening the cylinder body at the moment. This embodiment avoids whole damage of whole speed reducer with the mode of wearing and tearing, reminds the warning with the mode of noise simultaneously, falls to the minimum with the loss.

As shown in fig. 6, a limiting structure is disposed at the bottom of the sliding groove 20 to prevent the fastening device 3 from moving toward the inside of the sliding groove 20, the limiting structure includes a threaded hole 22 and a limiting bolt 23, the limiting bolt 23 passes through the threaded hole 22 and abuts against an inner end surface of the fastening device 3, and the limiting bolt 23 can limit the inner end surface of the fastening device 3, so that the fastening device 3 can only move outward. Therefore, when the planet carrier is used for a long time and abrasion is formed between the fastening inclined plane 30 and the fastening opening 12, the inner end of the fastening device 3 can be limited by tightening the limiting bolt 23, so that the fastening device 3 can only move towards the outer end, even if the planet carrier stops rotating in a gap formed after abrasion, the fastening device 3 is difficult to move inwards to be separated from the sliding groove 20, and after abrasion, only the limiting bolt 23 needs to be tightened, so that the thicker end of the fastening inclined plane 30 can enter the fastening opening 12, and the fastening device 3 does not need to be frequently replaced.

As shown in fig. 12, a counterweight groove 13 is further formed on the surface of the two half discs 2, a fastening device 3 is arranged in the counterweight groove 13, the fastening device 3 in the counterweight groove 13 has the same structure as the fastening device 3 in the sliding groove 20, a fixing plate 14 is arranged on the surface of the counterweight groove 13, and the fixing plate 14 presses and fixes the fastening device 3 in the counterweight groove 13. The weight distribution of the half-disk 1 and the half-disk 2 is more uniform by the arrangement of the weight distribution groove 13, and the weight distribution of the planet carrier is kept balanced.

The planet carrier assembly method in this embodiment is as follows:

1) and (3) machining: the first half disc 1 and the second half disc 2 are prepared by casting and forging, and then the sliding grooves 20, the inserting grooves 21 and the fastening ports 12 are formed on the surfaces of the first half disc 1 and the second half disc 2 through a machining center.

2) Adjusting the fastening angle: the contact position of the fastening opening 12 and the fastening inclined plane 30 is ground, the contact surface of the fastening opening 12 is parallel to the fastening inclined plane 30, and the contact surface of the fastening opening 12 and the fastening inclined plane 30 are inclined 1-2 degrees relative to the surface.

3) Butting the planet carriers: the insertion plate 11 is inserted into the insertion groove 21 such that the sliding groove 20 and the fastening opening 12 are aligned.

4) And (3) low-temperature assembly: the planet carrier and the fastening device 3 are both placed in an environment with the temperature of minus 35 ℃ and are kept stand for 10 hours, so that the size of the workpiece can be reduced by complete cold shrinkage, and then the fastening device 3 is inserted into the sliding groove 20 through the fastening opening 12.

5) And (3) temperature return test: the assembled planet carrier is placed in a normal temperature environment, the work piece is ensured to be recovered to the normal working temperature after standing for 10 hours, the fastening device 3 is pulled outwards, and the moving distance of the fastening device 3 is checked.

6) Fastening and limiting: the stop bolt 23 is inserted into the threaded hole 22, so that the stop bolt 23 abuts against the inner end of the fastening device 3.

In the assembling method, the thickness of the workpiece is adjusted by means of temperature difference, so that the thicker end of the fastening inclined plane 30 can be plugged into the fastening opening 12 from the tail part, and the thinner end of the fastening inclined plane 30 is clamped at the fastening opening 12 after the temperature is recovered.

The thickness difference of the fastening inclined plane 30 is between 0.1 and 1mm, and can be adjusted adaptively according to the size of the actual planet carrier, and meanwhile, the thickness difference of the fastening inclined plane 30 between the temperature of minus 35 ℃ and the normal temperature is also between 0.1 and 1 mm.

The foregoing is a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.