A planetary gear transmission device with variable basic component stiffness

Abstract

The present invention relates to a planetary gear transmission device with variable basic component stiffness, belonging to the field of power transmission technology; its input shaft is provided with a positioning support and a plurality of radial positioning holes; the adjuster is mounted on the input shaft and fixedly connected to the positioning holes; the pinion is mounted on the adjuster, one end of which is fixedly connected to the positioning support, and the other end of which is supported by the adjuster through its inner hole; the adjustment of the input shaft to the pinion is achieved by changing the mounting position of the adjuster; the planetary wheel support plate and the support plate cover are fitted on the input shaft, with a planetary wheel installed between the two, and the planetary wheel meshes with the pinion; the inner gear ring is mounted on the planetary wheel support plate and meshes with the planetary wheel; grooves are provided on both sides of the inner gear ring, and an adjustment frame is installed in the groove by means of a screw, and the position of the adjustment frame is adjusted by screwing the screw to change the support stiffness of the inner gear ring; the first output shaft is coaxially fixedly connected to the inner gear ring. The present invention mainly solves the problem in the prior art that the support stiffness of the shaft to the gear is fixed and cannot be adjusted.

Description

Technical Field

[0001] The present invention belongs to the technical field of power transmission, and in particular relates to a planetary gear transmission device with variable basic component stiffness. Background Art

[0002] To test the performance of a gear transmission system, it is typically installed in a gearbox and then subjected to a load test using a gearbox test bench. Existing gearbox transmission configurations include single-stage transmissions formed by large and small cylindrical gears, and star-type transmissions formed by a sun gear, star gear, and ring gear. Whether single-stage or star-type, the gears and shafts are typically mounted using a keyed or splined connection, resulting in a fixed shaft support stiffness. This connection structure is unsuitable for studying the effect of support stiffness on the vibration characteristics of a gear system.

[0003] Star gear transmissions have the advantages of compact structure, large transmission ratio, high efficiency, and strong load-bearing capacity, and have been widely used in high-power power transmission. Currently, star gear transmission systems mainly include two-branch, three-branch, four-branch, and five-branch types. However, the number and arrangement of the branches are fixed and cannot be adjusted according to actual needs. For example, a Chinese patent discloses a "quickly removable two-stage star gear transmission system gearbox." This gearbox uses three branches, which allows for easy gear replacement and testing. However, the disadvantage is that the number and arrangement of the branches are fixed and cannot be changed.

[0004] In order to solve the above problems, it is necessary to design a new type of planetary gear transmission device that can change the support stiffness of the shaft to the gear and can switch the star wheel to multiple branches and multiple distribution angles, thereby providing a test platform for studying the influence of support stiffness on the vibration characteristics of the gear system and multi-branch, multi-distribution angle planetary gear transmission. Summary of the Invention

[0005] Technical issues to be solved:

[0006] In order to avoid the shortcomings of the prior art, the present invention provides a planetary gear transmission device with variable basic component stiffness, wherein the pinion is installed on the input shaft, and a mounting hole is provided at one end of the pinion. A positioning support and multiple positioning holes are provided on the input shaft, and the positioning support is fixedly connected to the mounting hole at one end of the pinion. The other end of the pinion is supported by an adjuster which is sleeved on the input shaft and embedded in the inner hole of the pinion. The adjuster and the positioning hole are connected by bolts to limit and fix the adjuster axially. The position of the adjuster is adjusted by changing the connection between the adjuster and different positioning holes, thereby adjusting the support stiffness of the pinion by the input shaft; the inner gear ring is composed of a left and a right half gear ring connected and combined, and an adjustment frame is embedded and installed in the groove of the gear ring on both sides of the inner gear ring through a screw. The position of the adjustment frame in the groove of the inner gear ring is controlled by rotating the screw to adjust the support stiffness of the inner gear ring; at the same time, the present invention realizes the installation and adjustment of a single star wheel, two star wheels, and three star wheels by correspondingly designing multi-angle planetary gear shaft mounting holes on the star wheel support plate and the support plate cover.

[0007] This invention solves the problem of fixed, unadjustable shaft support stiffness for gears in existing technologies. It also addresses the issue of adjustable number and angle of single-, dual-, and triple-branch branches in planetary gear transmission systems. Installing the gear transmission device of this invention in a gearbox allows for testing the effect of support stiffness on the vibration characteristics of the gear system and studying the load-sharing characteristics of multiple branches in a planetary gear transmission.

[0008] The technical solution of the present invention is: a planetary gear transmission device with variable basic component stiffness, comprising an input shaft 1, a pinion 2, an adjuster 3, a first output shaft 4, a planet support plate 5, a support plate cover 6, a planet 7, a planet shaft 8, an inner gear ring 9, and an adjusting frame 10; one end of the input shaft 1 is provided with a positioning support 11, and the middle part of the input shaft is provided with a plurality of radial positioning holes 12; the adjuster 3 is an annular structure, which is sleeved on the input shaft 1 and fixedly connected to the positioning holes 12 by fasteners; the pinion 2 is sleeved on the input shaft 1 and the adjuster 3, one end of which is provided with a mounting hole 32 for passing through the fastener to connect to the positioning support 11, and the other end is supported by the adjuster 3. By fixedly connecting the adjuster 3 to different positioning holes 12, the axial movement of the adjuster 3 is achieved, thereby changing the support stiffness of the input shaft 1 on the pinion 2;

[0009] The star wheel support plate 5 and the support plate cover 6 are both provided with a center hole, and the two are cooperated and sleeved on the input shaft 1. The star wheel support plate 5 and the support plate cover 6 are provided with a plurality of star wheel shaft mounting holes 13 in a one-to-one correspondence. The star wheel 7 is installed between the star wheel support plate 5 and the support plate cover 6 through the star wheel shaft 8 and the first bearing 14, so that the star wheel 7 is meshed with the pinion 2; the inner ring gear 9 is coaxially sleeved on the outer periphery of the star wheel support plate 5 and meshes with the star wheel 7. The cross-section of the inner ring gear 9 is a groove shape with a left-right symmetrical groove, and the notches of the groove face both sides of the inner ring gear 9; the adjusting frame 10 is annular, and the two adjusting frames 10 are respectively embedded in the grooves on both sides of the inner ring gear 9 through a plurality of screws 15. The adjusting frame 10 is threadedly matched with the screw 15. The axial position of the adjusting frame 10 embedded in the groove of the inner ring gear 9 is adjusted by screwing the screw 15, thereby changing the support stiffness of the inner ring gear 9; the first output shaft 4 is coaxially fixedly connected to the inner ring gear 9.

[0010] A further technical solution of the present invention is: the positioning supports 11 of the input shaft 1 are provided with two groups, denoted as the first group of positioning supports 16 and the second group of positioning supports 17, the number of positioning supports in each group is the same, that is, multiple, and each group of positioning supports is evenly distributed in the same plane along the circumference of the input shaft 1, and each positioning support 11 is provided with a threaded hole for connecting the pinion 2, and the two groups of positioning supports are spaced a certain distance apart; the axial centers of the multiple radial positioning holes 12 are located in a straight line, and the positioning holes 12 are divided into two groups, denoted as the first group of positioning holes 18 and the second group of positioning holes 19, the number of positioning holes in each group is the same, that is, multiple, and the first group of positioning holes 18 is used in conjunction with the first group of positioning supports 16, and the second group of positioning holes 19 is used in conjunction with the second group of positioning supports 17.

[0011] A further technical solution of the present invention is: the inner hole of the pinion 2 is a stepped hole, and a slot 31 is opened at the small-diameter hole end thereof, which matches the shape and position of each group of positioning supports, and is used to avoid the positioning supports 11 during installation, and the end surface of the small-diameter hole end is evenly distributed with threaded mounting holes 32 that match the threaded holes on each group of positioning supports; its large-diameter hole end is supported by the adjuster 3, and the outer ring of the adjuster 3 contacts the inner hole of the large-diameter hole end, and a boss is provided on the outside of the adjuster 3, and the boss is provided with a threaded hole matching the positioning hole 12, which is used to pass the hexagon socket bolt 30 to connect the positioning hole 12 and fix the adjuster 3 in the desired position.

[0012] A further technical solution of the present invention is that when the first set of positioning holes 18 of the input shaft 1 cooperates with the first set of positioning supports 16, it is used for star transmission; when the second set of positioning holes 19 of the input shaft 1 cooperates with the second set of positioning supports 17, it is used for single-stage transmission.

[0013] A further technical solution of the present invention is: the inner gear ring 9 is composed of a left half inner gear ring 91 and a right half inner gear ring 92, and the left half inner gear ring 91 and the right half inner gear ring 92 are connected by a fastener in the middle, the cross-sectional groove notch of the left half inner gear ring 91 is to the left, and the cross-sectional groove notch of the right half inner gear ring 92 is to the right; one end of the lead screw 15 is clamped in the middle position between the left half inner gear ring 91 and the right half inner gear ring 92, for limiting the axial position of the lead screw 15, and the other end thereof passes through the adjustment frame 10 and extends from the notch of the left half inner gear ring 91 or the right half inner gear ring 92 for screwing adjustment.

[0014] A further technical solution of the present invention is: the first output shaft 4 is a housing shaft, one end of which is a hollow shaft, and the other end is a cylindrical housing coaxial with the hollow shaft, and the end of the housing is provided with a connecting flange, and the housing of the first output shaft 4 is sleeved on the right half of the inner gear ring 92, and the flange of the housing is fixedly connected to the right half of the inner gear ring 92 by fasteners.

[0015] A further technical solution of the present invention is: a plurality of support columns 51 are evenly distributed circumferentially on the inner end surface of the star wheel support plate 5, and threaded holes are provided on the upper end surfaces of the support columns 51; the support plate cover 6 is provided with through holes corresponding one-to-one to the threaded holes on the support columns 51, and the support plate cover 6 is fixed to the upper end surface of the support columns 51 by bolts.

[0016] A further technical solution of the present invention is: the multiple star wheel shaft mounting holes 13 are suitable for the installation and adjustment of a single star wheel 7, two star wheels 7, and three star wheels 7, wherein the installation angles of the two star wheels 7 are distributed in three forms: 90°, 120°, and 180°, and the installation angle of the three star wheels 7 is uniformly distributed at 120°.

[0017] A gearbox of a planetary gear transmission device with variable stiffness utilizing the basic component: comprising a gearbox housing 24, a second bearing 20, a first sleeve 21, a second sleeve 22, a first end cover 23, a third bearing 26, a third sleeve 27, and a second end cover 29; a first bearing seat 25 and a second bearing seat 28 are coaxially provided on the gearbox housing 24; one end of the input shaft 1 is mounted on the first bearing seat 25 through two second bearings 20 and the first sleeve 21, and is connected and sealed to the gearbox housing 24 through the first end cover 23; the other end of the input shaft 1 is mounted on the center hole of the support plate cover 6 through the second bearing 20, and the axial position of the second bearing 20 here is limited by the second sleeve 22; the first output shaft 4 is mounted on the second bearing seat 28 through two third bearings 26 and the third sleeve 27, and is connected and sealed to the gearbox housing 24 through the second end cover 29; the planetary wheel support plate 5 is fixed to the inner side wall of the gearbox housing 24 by fasteners.

[0018] Beneficial effects

[0019] The beneficial effects of the present invention are as follows: a planetary gear transmission device with variable basic component stiffness is provided, and a novel method of connecting gears, a ring gear, and a shaft is proposed, which is capable of changing the support stiffness of the shaft on the gears. By designing a positioning support and multiple positioning holes on the input shaft, a special pinion is installed to match it, and by installing an adjuster in different positioning holes, the position of the adjuster on the input shaft is adjusted, thereby changing the support stiffness of the input shaft on the pinion; the inner ring gear is composed of a left and right inner ring gear halves, with grooves opening outward on both sides of the inner ring gear. An adjustment frame is embedded in the grooves on both sides by multiple screws. By rotating the screws, the position of the adjustment frame in the inner ring gear groove is moved, thereby changing the support stiffness of the inner ring gear.

[0020] The present invention designs multi-angle planetary gear shaft mounting holes corresponding to the support plate and the support plate cover, so that a single star gear, two star gears and three star gears can be installed, thereby realizing the adjustable number of branches of the star-type transmission with single branch, two branches and three branches. The angle of the two branches can also be adjusted to three distribution forms of 90°, 120° and 180° as needed, and the angle of the three branches is evenly distributed at 120°.

[0021] By installing the transmission device of the present invention in a gearbox, it is possible to study the impact of support stiffness on the vibration characteristics of the gear system and conduct tests on multi-branch, multi-angle planetary gear transmissions. This invention solves the existing problems of unadjustable shaft support stiffness for gears and the fixed number and arrangement of branches in planetary gear transmissions. The input shaft of the present invention is also designed with positioning holes and positioning supports suitable for single-stage transmission, allowing for adjustment of the input shaft's support stiffness for the pinion in single-stage transmission mode. The present invention offers diverse functions, providing a flexible and reliable testing platform for studying gear transmission systems and possessing broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional structural diagram of the planetary gear transmission device of the present invention;

[0023] Figure 2 It is a cross-sectional view of the planetary gear transmission device of the present invention;

[0024] Figure 3 This is a structural diagram of the connection between the pinion and the input shaft of the present invention;

[0025] Figure 4 The three-dimensional diagram of the input axis of the present invention;

[0026] Figure 5 A three-dimensional diagram of the pinion of the present invention;

[0027] Figure 6 This is a structural diagram of the single-branch star transmission part of the present invention;

[0028] Figure 7This is a structural diagram of the internal part of the single-branch star transmission of the present invention;

[0029] Figure 8 This is a schematic diagram of a two-branch 90° included angle star transmission according to the present invention;

[0030] Figure 9 This is a schematic diagram of a two-branch 180° included angle star transmission according to the present invention;

[0031] Figure 10 This is a schematic diagram of a three-branch star transmission according to the present invention;

[0032] Figure 11 This is a structural diagram of the connection between the inner gear ring and the adjustment frame of the present invention;

[0033] Figure 12 This is a partial enlarged view of the connection structure between the inner gear ring and the adjustment frame of the present invention;

[0034] Figure 13 A three-dimensional diagram of the adjustment frame of the present invention;

[0035] Figure 14 This is a structural diagram of the planetary gear transmission device of the present invention installed on the gear box;

[0036] Figure 15 This is a diagram of the installation structure of the input shaft of the present invention when used for single-stage transmission;

[0037] Figure 16 This is a top view of the input shaft of the present invention when used for a single-stage transmission;

[0038] Figure 17 This is an appearance diagram of the input shaft of the present invention after being installed in a gearbox for single-stage transmission.

[0039] Explanation of the accompanying symbols: 1. Input shaft 2. Pinion 3. Regulator 4. First output shaft 5. Planetary gear support plate 51. Support column 6. Support plate cover 7. Planetary gear 8. Planetary gear shaft 9. Inner ring gear 91. Left half inner ring gear 92. Right half inner ring gear 10. Adjustment frame 11. Positioning support 12. Positioning hole 13. Planetary gear shaft mounting hole 14. First bearing 15. Lead screw 16. First group of positioning supports 17. Second group of positioning supports 18. First group of positioning holes 19. Second group of positioning holes 20. Second bearing 21. First sleeve 2 2. Second sleeve 23. First end cover 24. Gearbox housing 241. Lower housing 242. Upper housing 25. First bearing seat 26. Third bearing 27. Third sleeve 28. Second bearing seat 29. Second end cover 30. Hexagon socket bolt 31. Slotted hole 32. Mounting hole 33. Third bearing seat 34. Fourth bearing seat 35. Third end cover 36. Fourth end cover 37. Fifth end cover 38. Sixth end cover 39. Second output shaft 40. Large gear 41. Fourth bearing 42. Fourth sleeve 43. Fifth sleeve DETAILED DESCRIPTION

[0040] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0042] See Figure 1-5The present invention discloses a planetary gear transmission device with variable basic component stiffness, comprising an input shaft 1, a pinion 2, an adjuster 3, a first output shaft 4, a planetary gear support plate 5, a support plate cover 6, a planetary gear 7, a planetary gear shaft 8, an inner gear ring 9, and an adjusting frame 10. A positioning support 11 is provided at one end of the input shaft 1, and a plurality of radial positioning holes 12 are provided in the middle of the input shaft. The positioning supports 11 of the input shaft 1 are provided in two groups, designated as a first group of positioning supports 16 and a second group of positioning supports 17. The number of positioning supports in each group is the same, namely, four. Each group of positioning supports is uniformly distributed in the same plane along the circumference of the input shaft 1. Each positioning support 11 is provided with a threaded hole in the axial direction of the input shaft for connecting to the pinion 2. The two groups of positioning supports 11 are spaced a certain distance apart, and the distance is determined according to whether the input shaft 1 is used for a planetary transmission or a single-stage transmission. The axes of the plurality of radial positioning holes 12 lie on a straight line. The positioning holes 12 are divided into two groups, designated as a first group of positioning holes 18 and a second group of positioning holes 19. Each group of positioning holes has an equal number of five. When the input shaft 1 is used in a planetary gear transmission, the first group of positioning holes 18 cooperates with the first group of positioning supports 16. When the input shaft 1 is used in a single-stage transmission, the second group of positioning holes 19 cooperates with the second group of positioning supports 17.

[0043] The regulator 3 is specifically a ring-shaped structure, with a boss provided on the outside of the regulator 3, and a threaded hole matching the positioning hole 12 on the boss. The hexagon socket bolt 30 is passed through the threaded hole of the boss of the regulator 3 and connected to the positioning hole 12, so that the regulator 3 is fixed to the input shaft 1; the pinion 2 is sleeved on the input shaft 1 and also sleeved on the regulator 3. The inner hole of the pinion 2 is a stepped hole, and a slot 31 matching the shape and position of each group of positioning supports 11 is opened at the end of the small-diameter hole, which is used to avoid the positioning when installing. Positioning support 11 has mounting holes 32 on the end surface of the small-diameter hole that match the threaded holes on each set of positioning supports. Mounting holes 32 are threaded through-holes. During installation, the slotted hole 31 of the pinion gear is aligned with the first set of positioning supports 16. After the first set of positioning supports 16 passes through the slotted holes 31, the pinion gear 2 is rotated a certain angle to align the mounting holes 32 with the threaded holes of the first set of positioning supports 16. Bolts are then passed through the mounting holes 32 to connect the pinion gear 2 to the positioning support 11, securing the position of the pinion gear 2. The other end of the pinion gear has a large-diameter hole and is supported by the adjuster 3. The outer ring of the adjuster 3 contacts the inner hole of the large-diameter hole to support the pinion gear. By installing the adjuster 3 at different positions in the first set of positioning holes 18, the adjuster 3 can be moved axially, thereby changing the support stiffness of the input shaft 1 on the pinion gear 2 and achieving support stiffness adjustment.

[0044] See Figure 1-2 , Figure 6-7The planetary support plate 5 and support plate cover 6 are both provided with a center hole, and the two are fitted together on the input shaft 1. Specifically, five support columns 51 are evenly distributed along the circumference of the inner end surface of the planetary support plate 5, and the upper end surface of the support columns 51 is provided with threaded holes; the support plate cover 6 is provided with through holes that correspond one-to-one to the threaded holes on the support columns 51, and the support plate cover 6 is fixed to the upper end surface of the support columns 51 by bolts. A plurality of planetary shaft mounting holes 13 are provided on the planetary support plate 5 and support plate cover 6 in a one-to-one correspondence. The planetary wheel 7 is installed between the planetary support plate 5 and support plate cover 6 through the planetary shaft 8 and the first bearing 14, so that the planetary wheel 7 is meshed with the pinion 2; for details, see Figure 6-10 The multiple star wheel shaft mounting holes 13 are suitable for the installation and adjustment of a single star wheel 7, two star wheels 7, and three star wheels 7. The installation angles of the two star wheels 7 are distributed in three forms: 90°, 120°, and 180°. The installation angle of the three star wheels 7 is uniformly distributed at 120°.

[0045] See Figure 1-2 , Figure 11-13 The inner gear ring 9 is coaxially sleeved on the periphery of the star wheel support plate 5, and the inner gear ring 9 is meshed with the star wheel 7. The inner gear ring 9 is composed of a left half inner gear ring 91 and a right half inner gear ring 92. The left half inner gear ring 91 and the right half inner gear ring 92 are connected in the middle by fasteners. The cross-sections of the left half inner gear ring 91 and the right half inner gear ring 92 are both groove structures. The groove of the cross-section of the left half inner gear ring 91 is notched to the left, and the groove of the cross-section of the right half inner gear ring 92 is notched to the right; one end of the lead screw 15 is provided with an annular boss, and the other end is an inner hexagonal structure. The boss end of the lead screw 15 is clamped in the middle position of the left half inner gear ring 91 and the right half inner gear ring 92, which is used to limit the axial position of the lead screw 15. The other end passes through the adjusting frame 10 and extends from the notch of the left half inner gear ring 91 or the right half inner gear ring 92 for screwing and adjustment. The adjusting frame 10 is annular and has 6 threaded holes evenly distributed around the circumference of the adjusting frame 10 for passing the lead screw 15 and threadedly engaging with the lead screw 15; the two adjusting frames 10 are respectively embedded in the grooves of the left half inner gear ring 91 and the right half inner gear ring 92, and the axial position of the adjusting frame 10 embedded in the groove of the left half inner gear ring 91 or the right half inner gear ring 92 is adjusted by screwing the lead screws 15 on both sides, thereby changing the support stiffness of the inner gear ring 9.

[0046] See Figure 1-2 The first output shaft 4 is coaxially fixedly connected to the inner gear ring 9. The first output shaft 4 is a housing shaft, one end of which is a hollow shaft and the other end is a cylindrical housing coaxial with the hollow shaft. The end of the housing is provided with a connecting flange. The housing of the first output shaft 4 is coaxially sleeved on the right half of the inner gear ring 92, and the flange of the housing is fixedly connected to the right half of the inner gear ring 92 by bolts.

[0047] See Figure 2 、 Figure 14When the planetary gear transmission device with variable stiffness of the basic component described in the present invention is installed on the gearbox housing 24 for experimental testing, one end of the input shaft 1 is installed on the first bearing seat 25 of the gearbox housing 24 through two second bearings 20 and the first sleeve 21. The first sleeve 21 is used to limit the axial position of the two second bearings 20 and is connected to the gearbox housing 24 through the first end cover 23 to achieve sealing; the other end of the input shaft 1 is installed on the center hole of the support plate cover 6 through the second bearing 20, and the axial position of the second bearing 20 here is defined by the second sleeve 22; the first output shaft 4 is installed on the second bearing seat 28 of the gearbox housing 24 through two third bearings 26 and the third sleeve 27. The third sleeve 27 is used to limit the axial position of the two third bearings 26 and is connected to the gearbox housing 24 through the second end cover 29 to achieve sealing; the planetary wheel support plate 5 is fixed to the inner side wall of the gearbox housing 24 by fasteners, and the upper housing 242 of the gearbox housing is matched with the lower housing 241, and then the test can be carried out.

[0048] The specific working principle of the star gear transmission is: the external motor drives the input shaft 1 and then drives the pinion 2 to rotate. The pinion 2 transmits power to the star wheel 7. The rotation of the star wheel 7 drives the inner ring gear 9 to rotate, thereby driving the first output shaft 4 to rotate, and finally the first output shaft 4 outputs power.

[0049] See Figure 15-17 The input shaft 1 of the present invention can be used for the test of single-stage transmission. Specifically, the pinion 2 is fixed to the second group of positioning supports 17 of the input shaft 1, and the regulator 3 is installed in the second group of positioning holes 19. The input shaft 1 is installed on the first bearing seat 25 and the second bearing seat 28 on both sides of the gear box housing 24 through two second bearings 20, and the axial positions of the second bearings 20 on both sides are respectively limited by the fourth sleeve 42 and the fifth sleeve 43. The end of the first bearing seat 25 is sealed by the fifth end cover 37, and the end of the second bearing seat 28 is sealed by the sixth end cover 38; the large gear 40 is installed on the second output shaft 39 through a key connection so that it meshes with the pinion 2, and the second output shaft 39 is installed on the third bearing seat 33 and the fourth bearing seat 34 on both sides of the gear box housing 24 through two fourth bearings 41. The end of the third bearing seat 33 is sealed by the third end cover 35, and the end of the fourth bearing seat 34 is sealed by the fourth end cover 36. The upper case 242 of the gear box housing is matched with the lower case 241, and the test can be carried out.

[0050] The specific working principle of single-stage transmission is: the external motor drives the input shaft 1 and then drives the small gear 2 to rotate, the small gear 2 transmits power to the large gear 40, the large gear 40 rotates and then drives the second output shaft 39 to rotate, and the second output shaft 39 outputs power.

[0051] During testing, an external motor connected to input shaft 1 provides power to the gearbox, while an external brake connected to first output shaft 4 or second output shaft 39 brakes the gearbox. Seals are used between each end cap and the input shaft 1, first output shaft 4, and second output shaft 39 to prevent oil leakage. This invention can be installed in the same gearbox housing 24 for testing in both planetary gear transmission and single-stage transmission modes, saving housing manufacturing costs.

[0052] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A planetary gear transmission with variable basic component stiffness, characterized in that: The invention comprises an input shaft (1), a pinion (2), a regulator (3), a first output shaft (4), a star wheel support plate (5), a support plate cover (6), a star wheel (7), a star wheel shaft (8), an inner gear ring (9), and an adjustment frame (10); a positioning support (11) is provided at one end of the input shaft (1), and a plurality of radial positioning holes (12) are provided in the middle of the input shaft; the regulator (3) is an annular structure, which is sleeved on the input shaft (1) and fixedly connected to the positioning hole (12) through a fastener; the pinion (2) is sleeved on the input shaft (1) and the regulator (3), and one end thereof is provided with a mounting hole (32) for passing through the fastener to connect to the positioning support (11), and the other end thereof is supported by the inner hole of the regulator (3); by fixing the regulator (3) with different positioning holes (12), the axial movement of the regulator (3) is achieved, thereby changing the support stiffness of the input shaft (1) to the pinion (2); The star wheel support plate (5) and the support plate cover (6) are both provided with a center hole, and the two are fitted on the input shaft (1). The star wheel support plate (5) and the support plate cover (6) are provided with a plurality of star wheel shaft mounting holes (13) in a one-to-one correspondence. The star wheel (7) is installed between the star wheel support plate (5) and the support plate cover (6) through the star wheel shaft (8) and the first bearing (14), so that the star wheel (7) is meshed with the pinion (2); the inner gear ring (9) is coaxially fitted on the outer periphery of the star wheel support plate (5) and meshed with the star wheel (7). The inner gear ring (9) The cross section is a groove shape that is bilaterally symmetrical, and the notch of the groove faces both sides of the inner gear ring (9); the adjusting frame (10) is annular, and the two adjusting frames (10) are respectively embedded in the grooves on both sides of the inner gear ring (9) through multiple screws (15), and the adjusting frame (10) and the screws (15) are threadedly matched. By screwing the screws (15), the axial position of the adjusting frame (10) embedded in the groove of the inner gear ring (9) is adjusted, thereby changing the support stiffness of the inner gear ring (9); the first output shaft (4) is coaxially fixedly connected to the inner gear ring (9); The positioning supports (11) of the input shaft (1) are provided with two groups, which are denoted as a first group of positioning supports (16) and a second group of positioning supports (17). The number of positioning supports (11) in each group is the same, that is, multiple. Each group of positioning supports (11) is evenly distributed in the same plane along the circumference of the input shaft (1). Each positioning support (11) is provided with a threaded hole for connecting the pinion (2). The two groups of positioning supports are spaced a certain distance apart. The axes of the plurality of radial positioning holes (12) are located on a straight line. The positioning holes (12) are divided into two groups, which are denoted as a first group of positioning holes (18) and a second group of positioning holes (19). The number of positioning holes in each group is the same, that is, multiple. The first group of positioning holes (18) is used in conjunction with the first group of positioning supports (16), and the second group of positioning holes (19) is used in conjunction with the second group of positioning supports (17). The inner hole of the pinion (2) is a stepped hole, and a slotted hole (31) matching the shape and position of each group of positioning supports (11) is opened at the small-diameter hole end thereof, and is used to avoid the positioning supports (11) during installation, and the end surface of the small-diameter hole end is evenly distributed with mounting holes (32) matching the threaded holes on each group of positioning supports (11); the large-diameter hole end thereof is supported by the regulator (3), and the outer ring of the regulator (3) contacts the inner hole of the large-diameter hole end; a boss is provided on the outer side of the regulator (3), and the boss is provided with a threaded hole matching the positioning hole (12), and is used to pass the hexagon socket bolt (30) through the positioning hole (12) to fix the regulator (3) at a desired position; The inner gear ring (9) is composed of a left inner gear ring (91) and a right inner gear ring (92), and the left inner gear ring (91) and the right inner gear ring (92) are connected in the middle by a fastener, and the cross-sectional groove notch of the left inner gear ring (91) faces left, and the cross-sectional groove notch of the right inner gear ring (92) faces right; one end of the lead screw (15) is clamped in the middle position between the left inner gear ring (91) and the right inner gear ring (92) to limit the axial position of the lead screw (15), and the other end thereof passes through the adjustment frame (10) and extends from the notch of the left inner gear ring (91) or the right inner gear ring (92) to be screwed for adjustment; The first output shaft (4) is a housing shaft, one end of which is a hollow shaft and the other end is a cylindrical housing coaxial with the hollow shaft. The end of the housing is provided with a connecting flange. The housing of the first output shaft (4) is sleeved on the right half inner gear ring (92), and the flange of the housing is fixedly connected to the right half inner gear ring (92) by fasteners.

2. The planetary gear transmission with variable basic component stiffness according to claim 1, characterized in that: When the first group of positioning holes (18) cooperates with the first group of positioning supports (16), it is used for star transmission; when the second group of positioning holes (19) cooperates with the second group of positioning supports (17), it is used for single-stage transmission.

3. The planetary gear transmission with variable basic component stiffness according to claim 1, characterized in that: The inner end surface of the star wheel support plate (5) is uniformly distributed with a plurality of support columns (51) in the circumferential direction, and the upper end surfaces of the support columns (51) are provided with threaded holes; the support plate cover (6) is provided with through holes corresponding to the threaded holes on the support columns (51) one by one, and the support plate cover (6) is fixed to the upper end surface of the support columns (51) by bolts.

4. The planetary gear transmission with variable basic component stiffness according to claim 1, characterized in that: The plurality of star wheel shaft mounting holes (13) are suitable for mounting and adjusting a single star wheel (7), two star wheels (7), and three star wheels (7), wherein the mounting angles of the two star wheels (7) are distributed in three forms: 90°, 120°, and 180°, and the mounting angles of the three star wheels (7) are uniformly distributed at 120°.

5. A gearbox using a planetary gear transmission device with variable stiffness of a basic component according to any one of claims 1 to 4, characterized in that: The invention comprises a gear box housing (24), a second bearing (20), a first sleeve (21), a second sleeve (22), a first end cover (23), a third bearing (26), a third sleeve (27), and a second end cover (29); a first bearing seat (25) and a second bearing seat (28) are coaxially provided on the gear box housing (24); one end of the input shaft (1) is mounted on the first bearing seat (25) through two second bearings (20) and the first sleeve (21), and is connected to the gear box housing (24) through the first end cover (23). ) is connected and sealed; the other end of the input shaft (1) is mounted on the center hole of the support plate cover (6) through the second bearing (20), and the axial position of the second bearing (20) here is limited by the second sleeve (22); the first output shaft (4) is mounted on the second bearing seat (28) through two third bearings (26) and a third sleeve (27), and is connected to the gear box housing (24) through the second end cover (29) to seal the shaft end; the star wheel support plate (5) is fixed to the inner side wall of the gear box housing (24) by fasteners.

Images