Planetary gear transmission structure and compact oil passage hydraulic system of planetary gear transmission structure

Abstract

The application relates to a planetary gear transmission structure and a compact oil passage hydraulic system of the planetary gear transmission structure, and relates to the technical field of planetary gear transmission. The application solves the problems of the existing planetary gear transmission oil supply structure, such as complex installation and dismounting process, low implementation efficiency of assembly and disassembly process, and large size of the planetary gear transmission device. The central wheel is rotationally connected with combined upper and lower cover shells, two planetary wheel bodies are respectively engaged with two central wheel bodies, the planetary wheel is rotationally connected with the planetary carrier, the front and rear floating toothed rings are respectively engaged with the two planetary wheel bodies, the toothed ring wheel body is engaged with the front and rear floating toothed rings, the toothed ring wheel shaft rear end is rotationally connected with the main box body, and the toothed ring wheel shaft front end is rotationally connected with the planetary carrier. The application is used for making the planetary gear transmission structure more compact, reducing the complexity of the installation and dismounting process, and improving the implementation efficiency of the assembly and disassembly process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of planetary gear transmission, and particularly relates to a planetary gear transmission structure and a compact oil circuit hydraulic system of the planetary gear transmission structure. BACKGROUND

[0002] The planetary gear transmission structure is relatively complex compared with the parallel shaft gear transmission structure, and in addition to the conventional external gear, the gear transmission structure also contains a gear ring, a planet carrier and other structures, and the bearing structure contains a planet pin shaft bearing structure; the oil pipe structure of the conventional main pipe and branch pipe is used to supply oil to each transmission component, which greatly increases the complexity of the installation and disassembly process of the planetary gear transmission, affects the implementation efficiency of the assembly and disassembly process, and increases the outer size of the planetary gear transmission device. The compact arrangement of the lubrication structure of the planetary gear transmission component is related to the volume control of the entire planetary gear transmission structure and the convenience of installation and maintenance. SUMMARY

[0003] The present application aims to solve the problems of the existing planetary gear transmission oil supply structure, such as complex installation and disassembly process, low implementation efficiency of assembly and disassembly process, and large outer size of the planetary gear transmission device, and further provides a planetary gear transmission structure and a compact oil circuit hydraulic system of the planetary gear transmission structure.

[0004] The technical scheme of the present application is as follows:

[0005] The application discloses a planetary gear transmission structure which comprises a central wheel 1, a planet wheel 2, a front floating ring gear 3, a rear floating ring gear 4, an outer ring gear 5, an upper cover 6, a lower cover 7, a vertical plate 8, a main box 9, a planet carrier 10, a central wheel bearing 11, a planet wheel bearing 12, a front outer ring gear bearing 13 and a rear outer ring gear bearing 14, the vertical plate 8 is vertically arranged on one side of the main box 9, the upper cover 6 and the lower cover 7 are arranged on the side, away from the main box 9, of the vertical plate 8, the central wheel 1 is a gear shaft, the rear end of the gear shaft of the central wheel 1 is horizontally inserted into the main box 9, two central wheel bodies are coaxially and side by side arranged on the shaft section of the central wheel 1 in the main box 9, the upper cover 6 and the lower cover 7 are arranged on the front end of the gear shaft of the central wheel 1, the gear shaft of the central wheel 1 is rotationally connected with the combined upper cover 6 and lower cover 7 through the central wheel bearing 11, the combined upper cover 6 and lower cover 7 are arranged on the vertical plate 8, the planet carrier 10 is arranged in the main box 9, the planet wheel 2 is a gear shaft, two planet wheel bodies are coaxially and side by side arranged on the shaft section of the planet wheel 2, the two planet wheel bodies are engaged with the two central wheel bodies respectively, the gear shaft of the planet wheel 2 is rotationally connected with the planet carrier 10 through the planet wheel bearing 12, the front floating ring gear 3 and the rear floating ring gear 4 are coaxially and side by side arranged on the planet carrier 10, the front floating ring gear 3 and the rear floating ring gear 4 are engaged with the two planet wheel bodies respectively, the outer ring gear 5 comprises a ring gear body, a ring gear shaft and a ring gear-ring gear shaft connecting part, the ring gear body is engaged with the front floating ring gear 3 and the rear floating ring gear 4, the ring gear shaft is coaxially arranged on the side of the gear shaft of the central wheel 1, the rear end of the ring gear shaft is rotationally connected with the main box 9 through the rear outer ring gear bearing 14, the front end of the ring gear shaft is rotationally connected with the planet carrier 10 through the front outer ring gear bearing 13, and the middle part of the ring gear shaft is connected with the ring gear body through the ring gear-ring gear shaft connecting part.

[0006] Further, the planet wheel 2 and the planet wheel bearing 12 are left with a planet wheel-planet wheel bearing gap 15 through machining dimension, and the planet wheel 2 and the front floating ring gear 3 and the rear floating ring gear 4 are left with a planet wheel-floating ring gear gap 16 through machining dimension.

[0007] The application also provides a compact oil passage hydraulic system of the planetary gear transmission structure, which is realized on the basis of the planetary gear transmission structure in claim 2 and comprises a vertical plate-outer gear ring rear bearing communication pipe 17; a total oil inlet hole 7-1 vertically arranged is processed at the bottom of the lower housing 7, the lower end of the total oil inlet hole 7-1 is communicated with the lower surface of the lower housing 7, an L-shaped center wheel bearing oil inlet hole 7-2 is arranged at the upper part of the lower housing 7, the upper end of the vertical hole section of the center wheel bearing oil inlet hole 7-2 is communicated with the center wheel bearing mounting surface of the lower housing 7, the rear end of the horizontal hole section of the center wheel bearing oil inlet hole 7-2 is communicated with the total oil inlet hole 7-1, a front housing oil outlet hole 7-3 horizontally arranged is arranged at the rear part of the lower housing 7, the rear end of the front housing oil outlet hole 7-3 is communicated with the rear surface of the lower housing 7, and the front end of the front housing oil outlet hole 7-3 is communicated with the total oil inlet hole 7-1; a vertical plate communication oil hole 8-1 horizontally arranged is processed on the vertical plate 8, the front and rear ends of the vertical plate communication oil hole 8-1 are respectively communicated with the front and rear surfaces of the vertical plate 8, the vertical plate communication oil hole 8-1 is coaxially arranged with the front housing oil outlet hole 7-3, the front end of the vertical plate communication oil hole 8-1 is communicated with the rear end of the front housing oil outlet hole 7-3, a vertical plate lower inclined hole 8-2 is processed at the lower part of the vertical plate 8, the upper end of the vertical plate lower inclined hole 8-2 is communicated with the vertical plate communication oil hole 8-1, the lower end of the vertical plate lower inclined hole 8-2 is communicated with the rear surface of the vertical plate 8, and a vertical plate ring groove 8-3 coaxially arranged is processed in the middle of the rear surface of the vertical plate 8; a center wheel center wheel planetary gear lubricating oil pipe 10-1 horizontally arranged is arranged on the planet carrier 10, the center wheel center wheel planetary gear lubricating oil pipe 10-1 is located at the two center wheel body side parts of the center wheel 1, the front end of the center wheel center wheel planetary gear lubricating oil pipe 10-1 is communicated with the vertical plate ring groove 8-3, a plurality of center wheel planetary gear oil injection holes 10-2 are radially processed on the side close to the two center wheel bodies of the center wheel center wheel planetary gear lubricating oil pipe 10-1, a vertical plate outer gear ring front bearing oil inlet hole 10-3 is processed at the rear part of the planet carrier 10, and the upper end of the vertical plate outer gear ring front bearing oil inlet hole 10-3 is communicated with the outer gear ring front bearing mounting surface of the planet carrier 10.The planet wheel bearing 12 is axially machined with a planet wheel bearing center hole 12-1, the two ends of which are communicated with the front and back surfaces of the planet wheel bearing 12, the front end of the planet wheel bearing center hole 12-1 is communicated with the stand ring groove 8-3, the back part of the planet wheel bearing 12 is radially machined with a planet wheel bearing connecting oil hole 12-3, the lower end of which is communicated with the planet wheel bearing center hole 12-1, the upper end of the planet wheel bearing connecting oil hole 12-3 is communicated with the lower end of the outer gear ring front bearing oil inlet hole 10-3, the middle part of the planet wheel bearing 12 is radially machined with two parallel arranged planet wheel bearing oil inlet holes 12-2, the upper ends of which are communicated with the planet wheel bearing center hole 12-1, the lower ends of the two planet wheel bearing oil inlet holes 12-2 are communicated with the planet wheel bearing gap 15, the two planet wheel body connecting parts of the planet wheel 2 are radially machined with planet wheel radial oil holes 2-1, the upper ends of which are communicated with the planet wheel bearing gap 15, the lower ends of the planet wheel radial oil holes 2-1 are communicated with the planet wheel floating gear ring gap 16, the front floating gear ring 3 and the back floating gear ring 4 are respectively machined with a front floating gear ring communication oil hole 3-1 and a back floating gear ring communication oil hole 4-1, which are both communicated with the planet wheel floating gear ring gap 16, the outer gear ring back bearing 14 is radially machined with an outer gear ring back bearing oil inlet hole 14-1, the upper end of which is communicated with the gear ring shaft mounting surface of the outer gear ring back bearing 14, one end of the stand-outer gear ring back bearing communication pipe 17 is connected with the back end of the stand lower inclined hole 8-2, the other end of the stand-outer gear ring back bearing communication pipe 17 is connected with the lower end of the outer gear ring back bearing oil inlet hole 14-1, the inner surface of the outer gear ring back bearing 14 is circumferentially machined with an outer gear ring back bearing oil storage ring groove 14-2, the front part of the gear ring shaft of the outer gear ring 5 is machined with an outer gear ring center oil hole 5-2, the front end of which is communicated with the gear ring shaft front surface, the shaft of the center wheel 1 is axially machined with a center wheel center hole 1-1, the back end of which is communicated with the shaft back surface of the center wheel 1, the two center wheel bodies are both radially machined with center wheel oil discharge holes 1-2, the lower ends of which are communicated with the center wheel center hole 1-1, the upper ends of the center wheel oil discharge holes 1-2 are communicated with the center wheel body side surface, the center wheel center hole 1-1 coincides with the hole center line of the outer gear ring center oil hole 5-2, the outer gear ring 5 is machined with vertically arranged outer gear ring radial oil holes 5-1, the upper and lower ends of which are respectively communicated with the gear ring shaft side surface, the two ends of the outer gear ring radial oil holes 5-1 are communicated with the outer gear ring back bearing oil storage ring groove 14-2.

[0008] Further, the gear surface lubrication of the center wheel 1 and the planetary wheel 2 comes from two lines of oil path: the lubricating oil in the first line of oil path passes through the total oil inlet hole 7-1, the front cover shell oil outlet hole 7-3, the vertical plate communication oil hole 8-1, the vertical plate ring groove 8-3, the center wheel planetary wheel lubricating oil pipe 10-1 and the center wheel planetary wheel oil injection hole 10-2 in turn; the lubricating oil in the second line of oil path passes through the total oil inlet hole 7-1, the front cover shell oil outlet hole 7-3, the vertical plate communication oil hole 8-1, the vertical plate lower inclined hole 8-2, the vertical plate-outer gear ring rear bearing communication pipe 17, the outer gear ring rear bearing oil inlet hole 14-1, the outer gear ring rear bearing oil storage ring groove 14-2, the outer gear ring wheel radial oil hole 5-1, the outer gear ring wheel center oil hole 5-2, the center wheel center hole 1-1 and the center wheel oil drain hole 1-2 in turn.

[0009] Further, the lubricating oil path of the outer gear ring rear bearing 14: the total oil inlet hole 7-1, the front cover shell oil outlet hole 7-3, the vertical plate communication oil hole 8-1, the vertical plate lower inclined hole 8-2, the vertical plate-outer gear ring rear bearing communication pipe 17 and the outer gear ring rear bearing oil inlet hole 14-1.

[0010] Further, the lubricating oil path of the planetary wheel bearing 12: the total oil inlet hole 7-1, the front cover shell oil outlet hole 7-3, the vertical plate communication oil hole 8-1, the vertical plate ring groove 8-3, the planetary wheel bearing center hole 12-1, the planetary wheel bearing oil inlet hole 12-2 and the planetary wheel planetary wheel bearing gap 15.

[0011] Further, the lubricating oil path of the planetary wheel 2 and the front floating gear ring 3, the rear floating gear ring 4: the total oil inlet hole 7-1, the front cover shell oil outlet hole 7-3, the vertical plate communication oil hole 8-1, the vertical plate ring groove 8-3, the planetary wheel bearing center hole 12-1, the planetary wheel bearing oil inlet hole 12-2, the planetary wheel planetary wheel bearing gap 15, the planetary wheel radial oil hole 2-1 and the planetary wheel floating gear ring gap 16.

[0012] Further, the lubricating oil path of the front floating gear ring 3, the rear floating gear ring 4 and the outer gear ring wheel 5: the total oil inlet hole 7-1, the front cover shell oil outlet hole 7-3, the vertical plate communication oil hole 8-1, the vertical plate ring groove 8-3, the planetary wheel bearing center hole 12-1, the planetary wheel bearing oil inlet hole 12-2, the planetary wheel planetary wheel bearing gap 15, the planetary wheel radial oil hole 2-1, the planetary wheel floating gear ring gap 16, the front floating gear ring communication oil hole 3-1 and the rear floating gear ring communication oil hole 4-1, the gear surfaces of the front floating gear ring 3, the rear floating gear ring 4 and the outer gear ring wheel 5.

[0013] Further, the lubricating oil path of the outer gear ring front bearing 13: the total oil inlet hole 7-1, the front cover shell oil outlet hole 7-3, the vertical plate communication oil hole 8-1, the vertical plate ring groove 8-3, the planetary wheel bearing center hole 12-1, the planetary wheel bearing connection oil hole 12-3 and the outer gear ring front bearing oil inlet hole 10-3.

[0014] The present application has the following effects compared with the prior art:

[0015] The compact oil passage hydraulic system of the planetary gear transmission structure greatly reduces the conventional pipeline structure used for lubrication of the planetary gear transmission and bearing, realizes lubrication of the gear transmission and bearing by machining the communicating oil holes on the transmission components and the box support components and docking the communicating oil holes along the transmission chain, makes the planetary gear transmission structure more compact, reduces the complexity of the installation and disassembly process, and improves the implementation efficiency of the assembly and disassembly process. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of the planetary gear transmission structure of the present application; Figure 2 is a schematic diagram of the box support structure of the present application; Figure 3 is a schematic diagram of the bearing structure of the present application; Figure 4 is a schematic diagram of the planetary gear transmission oil passage of the present application; Figure 5 is a schematic diagram of the extracted oil passage of the present application; Figure 6 is a sectional view of the central wheel of the present application; Figure 7 is a sectional view of the front floating ring gear and the rear floating ring gear of the present application; Figure 8 is a sectional view of the outer ring gear of the present application; Figure 9 is a sectional view of the lower housing of the present application; Figure 10 is a sectional view of the vertical plate of the present application; Figure 11 is a sectional view of the planet carrier of the present application; Figure 12 is a sectional view of the planet wheel bearing of the present application; Figure 13 is a sectional view of the front bearing of the outer ring gear of the present application.

[0017] In the figure: 1, center wheel; 2, planetary gear; 3, front floating ring gear; 4, rear floating ring gear; 5, outer ring gear; 6, upper cover; 7, lower cover; 8, stand; 9, main box; 10, planetary carrier; 11, center wheel bearing; 12, planetary gear bearing; 13, outer ring gear front bearing; 14, outer ring gear rear bearing; 15, planetary gear planetary gear bearing gap; 16, planetary gear floating ring gear gap; 17, stand-outer ring gear rear bearing communication pipe; 1-1, center wheel center hole; 1-2, center wheel oil drain hole; 3-1, front floating ring gear communication oil hole; 4-1, rear floating ring gear communication oil hole; 5-1, outer ring gear radial oil hole; 5-2, outer ring gear center oil hole; 7-1, total oil inlet hole; 7-2, center wheel bearing oil inlet hole; 7-3, front cover oil outlet hole; 8-1, stand communication oil hole; 8-2, stand lower inclined hole; 8-3, stand ring groove; 10-1, center wheel planetary gear lubricating oil pipe; 10-2, center wheel planetary gear oil injection hole; 10-3, outer ring gear front bearing oil inlet hole; 12-1, planetary gear bearing center hole; 12-2, planetary gear bearing oil inlet hole; 12-3, planetary gear bearing connection oil hole; 14-1, outer ring gear rear bearing oil inlet hole; 14-2, outer ring gear rear bearing oil storage ring groove. DETAILED DESCRIPTION

[0018] DETAILED DESCRIPTION Figures 1 to 13The embodiment is described, and the planetary gear transmission structure of the embodiment comprises a central wheel 1, a planet wheel 2, a front floating ring gear 3, a rear floating ring gear 4, an outer ring gear 5, an upper cover 6, a lower cover 7, a vertical plate 8, a main box 9, a planet carrier 10, a central wheel bearing 11, a planet wheel bearing 12, a front outer ring gear bearing 13, and a rear outer ring gear bearing 14. The vertical plate 8 is arranged vertically on one side of the main box 9. The upper cover 6 and the lower cover 7 are arranged on the side, away from the main box 9, of the vertical plate 8. The central wheel 1 is a gear shaft. The rear end of the shaft of the central wheel 1 is horizontally inserted into the main box 9. The shaft section of the central wheel 1 inside the main box 9 is provided with two central wheel bodies arranged coaxially and side by side. The upper cover 6 and the lower cover 7 are arranged on the upper and lower sides of the front end of the shaft of the central wheel 1. The shaft of the central wheel 1 is rotatably connected to the combined upper cover 6 and lower cover 7 through the central wheel bearing 11. The combined upper cover 6 and lower cover 7 are arranged on the vertical plate 8. The planet carrier 10 is arranged in the main box 9. The planet wheel 2 is a gear shaft. The shaft section of the planet wheel 2 is provided with two planet wheel bodies arranged coaxially and side by side. The two planet wheel bodies are engaged with the two central wheel bodies, respectively. The shaft of the planet wheel 2 is rotatably connected to the planet carrier 10 through the planet wheel bearing 12. The front floating ring gear 3 and the rear floating ring gear 4 are arranged coaxially and side by side on the planet carrier 10. The front floating ring gear 3 and the rear floating ring gear 4 are engaged with the two planet wheel bodies, respectively. The outer ring gear 5 comprises a ring gear body, a ring gear shaft, and a ring gear-ring gear shaft connecting portion. The ring gear body is engaged with the front floating ring gear 3 and the rear floating ring gear 4. The ring gear shaft is arranged coaxially on the side of the shaft of the central wheel 1. The rear end of the ring gear shaft is rotatably connected to the main box 9 through the rear outer ring gear bearing 14. The front end of the ring gear shaft is rotatably connected to the planet carrier 10 through the front outer ring gear bearing 13. The middle part of the ring gear shaft is connected to the ring gear body through the ring gear-ring gear shaft connecting portion.

[0019] Specific implementation method two: in combination Figures 1 to 13 The embodiment is described. The planet wheel 2 and the planet wheel bearing 12 are left with a planet wheel-planet wheel bearing gap 15 through machining size. The planet wheel 2 and the front floating ring gear 3 and the rear floating ring gear 4 are left with a planet wheel-floating ring gear gap 16 through machining size. The other components and connection relationships are the same as those in the specific implementation method one.

[0020] Specific implementation method three: in combination Figures 1 to 13To illustrate the embodiment, the compact oil passage hydraulic system of the planetary gear transmission structure of the embodiment is realized on the basis of the planetary gear transmission structure in claim 2, and the compact oil passage hydraulic system comprises a vertical plate-outer gear ring rear bearing communication pipe 17; a total oil inlet hole 7-1 vertically arranged is processed at the bottom of the lower housing 7, the lower end of the total oil inlet hole 7-1 is communicated with the lower surface of the lower housing 7, an L-shaped center wheel bearing oil inlet hole 7-2 is arranged at the upper part of the lower housing 7, the upper end of the vertical hole section of the center wheel bearing oil inlet hole 7-2 is communicated with the center wheel bearing mounting surface of the lower housing 7, the rear end of the horizontal hole section of the center wheel bearing oil inlet hole 7-2 is communicated with the total oil inlet hole 7-1, a front housing oil outlet hole 7-3 horizontally arranged is arranged at the rear part of the lower housing 7, the rear end of the front housing oil outlet hole 7-3 is communicated with the rear surface of the lower housing 7, and the front end of the front housing oil outlet hole 7-3 is communicated with the total oil inlet hole 7-1; a vertical plate communication oil hole 8-1 horizontally arranged is processed on the vertical plate 8, the front and rear ends of the vertical plate communication oil hole 8-1 are respectively communicated with the front and rear surfaces of the vertical plate 8, the vertical plate communication oil hole 8-1 is coaxially arranged with the front housing oil outlet hole 7-3, the front end of the vertical plate communication oil hole 8-1 is communicated with the rear end of the front housing oil outlet hole 7-3, a vertical plate lower inclined hole 8-2 is processed at the lower part of the vertical plate 8, the upper end of the vertical plate lower inclined hole 8-2 is communicated with the vertical plate communication oil hole 8-1, the lower end of the vertical plate lower inclined hole 8-2 is communicated with the rear surface of the vertical plate 8, and a vertical plate ring groove 8-3 coaxially arranged is processed in the middle part of the rear surface of the vertical plate 8; a center wheel center wheel planetary gear lubricating oil pipe 10-1 horizontally arranged is arranged on the planet carrier 10, the center wheel center wheel planetary gear lubricating oil pipe 10-1 is located at the two center wheel body side parts of the center wheel 1, the front end of the center wheel center wheel planetary gear lubricating oil pipe 10-1 is communicated with the vertical plate ring groove 8-3, a plurality of center wheel planetary gear oil injection holes 10-2 are radially processed on the side close to the two center wheel bodies of the center wheel center wheel planetary gear lubricating oil pipe 10-1, a vertical plate outer gear ring front bearing oil inlet hole 10-3 is processed at the rear part of the planet carrier 10, and the upper end of the vertical plate outer gear ring front bearing oil inlet hole 10-3 is communicated with the outer gear ring front bearing mounting surface of the planet carrier 10.The planet wheel bearing 12 is axially machined with a planet wheel bearing center hole 12-1, the two ends of which are respectively communicated with the front and rear surfaces of the planet wheel bearing 12, the front end of the planet wheel bearing center hole 12-1 is communicated with the stand ring groove 8-3, the rear part of the planet wheel bearing 12 is radially machined with a planet wheel bearing connecting oil hole 12-3, the lower end of which is communicated with the planet wheel bearing center hole 12-1, the upper end of the planet wheel bearing connecting oil hole 12-3 is communicated with the lower end of the outer gear ring front bearing oil inlet hole 10-3, the middle part of the planet wheel bearing 12 is radially machined with two parallel arranged planet wheel bearing oil inlet holes 12-2, the upper ends of which are communicated with the planet wheel bearing center hole 12-1, the lower ends of the two planet wheel bearing oil inlet holes 12-2 are communicated with the planet wheel bearing gap 15, the two planet wheel bodies of the planet wheel 2 are radially machined with a planet wheel radial oil hole 2-1, the upper end of which is communicated with the planet wheel bearing gap 15, and the lower end of the planet wheel radial oil hole 2-1 is communicated with the planet wheel floating gear ring gap 16; the front floating gear ring 3 and the rear floating gear ring 4 are respectively machined with a front floating gear ring communication oil hole 3-1 and a rear floating gear ring communication oil hole 4-1, both of which are communicated with the planet wheel floating gear ring gap 16; the outer gear ring rear bearing 14 is radially machined with an outer gear ring rear bearing oil inlet hole 14-1, the upper end of which is communicated with the gear ring shaft mounting surface of the outer gear ring rear bearing 14, one end of the stand-outer gear ring rear bearing communication pipe 17 is connected with the rear end of the stand lower inclined hole 8-2, the other end of the stand-outer gear ring rear bearing communication pipe 17 is connected with the lower end of the outer gear ring rear bearing oil inlet hole 14-1, the inner surface of the outer gear ring rear bearing 14 is circumferentially machined with an outer gear ring rear bearing oil storage ring groove 14-2, the front part of the gear ring shaft of the outer gear ring 5 is machined with an outer gear ring center oil hole 5-2, the front end of which is communicated with the gear ring shaft front surface, the shaft of the center wheel 1 is axially machined with a center wheel center hole 1-1, the rear end of which is communicated with the rear surface of the center wheel shaft, both of the two center wheel bodies are radially machined with a center wheel oil drain hole 1-2, the lower end of which is communicated with the center wheel center hole 1-1, and the upper end of the center wheel oil drain hole 1-2 is communicated with the center wheel body side surface, the center wheel center hole 1-1 coincides with the hole center line of the outer gear ring center oil hole 5-2, the outer gear ring 5 is machined with a vertically arranged outer gear ring radial oil hole 5-1, the upper and lower ends of which are respectively communicated with the gear ring shaft side surface, and the two ends of the outer gear ring radial oil hole 5-1 are communicated with the outer gear ring rear bearing oil storage ring groove 14-2. The other components and connection relationships are the same as those in the first or second embodiments.

[0021] Specific embodiment four: combination Figures 1 to 13The embodiment is described, the gear surface lubrication of the center wheel 1 and the planetary gear 2 of the embodiment comes from two lines of oil path: the lubricating oil in the first line of oil path passes through the total oil inlet hole 7-1, the front cover shell oil outlet hole 7-3, the vertical plate communication oil hole 8-1, the vertical plate ring groove 8-3, the center wheel planetary gear lubricating oil pipe 10-1 and the center wheel planetary gear oil injection hole 10-2 in turn; the lubricating oil in the second line of oil path passes through the total oil inlet hole 7-1, the front cover shell oil outlet hole 7-3, the vertical plate communication oil hole 8-1, the vertical plate lower inclined hole 8-2, the vertical plate-outer gear ring rear bearing communication pipe 17, the outer gear ring rear bearing oil inlet hole 14-1, the outer gear ring rear bearing oil storage ring groove 14-2, the outer gear ring wheel radial oil hole 5-1, the outer gear ring wheel center oil hole 5-2, the center wheel center hole 1-1 and the center wheel oil drain hole 1-2 in turn. In this way, the first line of oil path plays a main auxiliary role for the gear surface of the center wheel 1 and the planetary gear 2; the second line of oil path plays a main auxiliary role for the gear surface of the center wheel 1 and the planetary gear 2. The other components and connection relationships are the same as those in the first, second or third specific embodiment.

[0022] Specific embodiment five: in combination with Figures 1 to 13 The embodiment is described, the lubricating oil path of the outer gear ring rear bearing 14 of the embodiment: the total oil inlet hole 7-1, the front cover shell oil outlet hole 7-3, the vertical plate communication oil hole 8-1, the vertical plate lower inclined hole 8-2, the vertical plate-outer gear ring rear bearing communication pipe 17 and the outer gear ring rear bearing oil inlet hole 14-1. The other components and connection relationships are the same as those in the first, second, third or fourth specific embodiment.

[0023] Specific embodiment six: in combination with Figures 1 to 13 The embodiment is described, the lubricating oil path of the planetary gear bearing 12 of the embodiment: the total oil inlet hole 7-1, the front cover shell oil outlet hole 7-3, the vertical plate communication oil hole 8-1, the vertical plate ring groove 8-3, the planetary gear bearing center hole 12-1, the planetary gear bearing oil inlet hole 12-2 and the planetary gear planetary gear bearing gap 15. The other components and connection relationships are the same as those in the first, second, third, fourth or fifth specific embodiment.

[0024] Specific embodiment seven: in combination with Figures 1 to 13 The embodiment is described, the gear surface lubricating oil path of the planetary gear 2 and the front floating gear ring 3 and the rear floating gear ring 4 of the embodiment: the total oil inlet hole 7-1, the front cover shell oil outlet hole 7-3, the vertical plate communication oil hole 8-1, the vertical plate ring groove 8-3, the planetary gear bearing center hole 12-1, the planetary gear bearing oil inlet hole 12-2, the planetary gear planetary gear bearing gap 15, the planetary gear radial oil hole 2-1 and the planetary gear floating gear ring gap 16. The other components and connection relationships are the same as those in the first, second, third, fourth, fifth or sixth specific embodiment.

[0025] Specific embodiment eight: in combination with Figures 1 to 13This embodiment describes the lubrication path for the gear surfaces of the front floating gear ring 3, the rear floating gear ring 4, and the outer gear ring 5 as follows: main oil inlet 7-1, front cover oil outlet 7-3, vertical plate connecting oil hole 8-1, vertical plate annular groove 8-3, planetary gear bearing center hole 12-1, planetary gear bearing oil inlet 12-2, planetary gear bearing clearance 15, planetary gear radial oil hole 2-1, planetary gear floating gear ring clearance 16, front floating gear ring connecting oil hole 3-1 and rear floating gear ring connecting oil hole 4-1, and the gear surfaces of the front floating gear ring 3, rear floating gear ring 4, and outer gear ring 5. Other components and connections are the same as in specific embodiments one, two, three, four, five, six, or seven.

[0026] Specific Implementation Method Nine: Combining Figures 1 to 13 This embodiment describes the lubrication path of the external gear ring front bearing 13 as follows: main oil inlet 7-1, front cover oil outlet 7-3, vertical plate connecting oil hole 8-1, vertical plate annular groove 8-3, planetary gear bearing center hole 12-1, planetary gear bearing connecting oil hole 12-3, and external gear ring front bearing oil inlet 10-3. Other components and connections are the same as in specific embodiments one, two, three, four, five, six, seven, or eight.

[0027] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A compact hydraulic system with a planetary gear transmission structure, the planetary gear transmission structure comprising a central gear (1), planetary gears (2), a front floating gear ring (3), a rear floating gear ring (4), an external gear ring (5), an upper cover (6), a lower cover (7), a vertical plate (8), a main housing (9), a planetary carrier (10), a central gear bearing (11), a planetary gear bearing (12), a front bearing (13) of the external gear ring, and a rear bearing (14) of the external gear ring. A vertically arranged vertical plate (8) is installed on one side of the main housing (9), and an upper cover (6) and a lower cover (7) are installed on the side of the vertical plate (8) away from the main housing (9). The central wheel (1) is a gear shaft. The rear end of the central wheel (1) shaft is horizontally inserted into the main housing (9). The central wheel (1) shaft section inside the main housing (9) has two coaxial and parallel central wheel bodies. The front end of the central wheel (1) shaft is provided with an upper cover (6) and a lower cover (7) on the upper and lower sides respectively. The central wheel (1) shaft is rotatably connected to the combined upper cover (6) and lower cover (7) through the central wheel bearing (11). The upper cover (6) and lower cover (7) are mounted on the vertical plate (8) after being combined. The planetary carrier (10) is installed inside the main housing (9). The planetary gear (2) is a gear. The axle of the planetary gear (2) has two planetary gear bodies arranged coaxially and side by side. The two planetary gear bodies mesh with the two central gear bodies respectively. The axle of the planetary gear (2) is rotatably connected to the planet carrier (10) through the planetary gear bearing (12). The planet carrier (10) is fitted with a front floating gear ring (3) and a rear floating gear ring (4) arranged coaxially and side by side. The front floating gear ring (3) and the rear floating gear ring (4) mesh with the two planetary gear bodies respectively. The outer gear ring (5) includes a gear ring body, a gear ring shaft and a gear ring-gear ring shaft connection part. The gear ring body is connected to the front floating gear ring (3) and the rear floating gear ring. (4) The gear ring shaft is coaxially set on one side of the shaft of the center gear (1). The rear end of the gear ring shaft is rotatably connected to the main housing (9) through the rear bearing (14) of the outer gear ring. The front end of the gear ring shaft is rotatably connected to the planet carrier (10) through the front bearing (13) of the outer gear ring. The middle part of the gear ring shaft is connected to the gear ring body through the gear ring-gear ring shaft connection part. The planet gear (2) and the planet gear bearing (12) have a planet gear-planet gear bearing clearance (15) through machining dimensions. The planet gear (2) and the front floating gear ring (3) and the rear floating gear ring (4) have a planet gear floating gear ring clearance (16) through machining dimensions. Its features are: The compact hydraulic circuit system is implemented based on the planetary gear transmission structure. The compact hydraulic circuit system includes a vertical plate-external gear ring rear bearing connecting pipe (17); the bottom of the lower cover (7) is machined with a vertically arranged main oil inlet hole (7-1), the lower end of the main oil inlet hole (7-1) is connected to the lower surface of the lower cover (7), and the upper part of the lower cover (7) is provided with an L-shaped central wheel bearing oil inlet hole (7-2). The upper end of the vertical hole section of the central wheel bearing oil inlet hole (7-2) is connected to the central wheel bearing mounting surface of the lower cover (7), and the central wheel shaft... The rear end of the horizontal section of the oil inlet hole (7-2) is connected to the main oil inlet hole (7-1). The rear part of the lower cover (7) is provided with a horizontally arranged front cover oil outlet hole (7-3). The rear end of the front cover oil outlet hole (7-3) is connected to the rear surface of the lower cover (7), and the front end of the front cover oil outlet hole (7-3) is connected to the main oil inlet hole (7-1). A horizontally arranged vertical plate connecting oil hole (8-1) is machined on the vertical plate (8). The front and rear ends of the vertical plate connecting oil hole (8-1) are connected to the front and rear surfaces of the vertical plate (8) respectively. The vertical plate connecting oil hole (8-1) is connected to the front cover oil outlet hole. Holes (7-3) are arranged coaxially. The front end of the oil hole (8-1) of the vertical plate is connected to the rear end of the oil outlet hole (7-3) of the front cover. The lower part of the vertical plate (8) is machined with a vertical plate inclined hole (8-2). The upper end of the vertical plate inclined hole (8-2) is connected to the vertical plate oil hole (8-1). The lower end of the vertical plate inclined hole (8-2) is connected to the rear surface of the vertical plate (8). The middle part of the rear surface of the vertical plate (8) is machined with a coaxially arranged vertical plate annular groove (8-3). A horizontally arranged central gear planetary gear lubrication oil pipe (10-1) is installed on the planet carrier (10). The central gear planetary gear The lubricating oil pipe (10-1) is located on the side of the two central wheel bodies of the central wheel (1). The front end of the central wheel planetary gear lubricating oil pipe (10-1) is connected to the vertical plate annular groove (8-3). The central wheel planetary gear lubricating oil pipe (10-1) has multiple central wheel planetary gear oil injection holes (10-2) processed radially on the side close to the two central wheel bodies. The rear part of the planet carrier (10) has a vertically arranged external gear ring front bearing oil inlet hole (10-3). The upper end of the external gear ring front bearing oil inlet hole (10-3) is connected to the external gear ring front bearing mounting surface of the planet carrier (10).The planetary bearing (12) has a planetary bearing center hole (12-1) machined along the axial direction. The front and rear ends of the planetary bearing center hole (12-1) are respectively connected to the front and rear surfaces of the planetary bearing (12). The front end of the planetary bearing center hole (12-1) is connected to the vertical plate annular groove (8-3). The rear part of the planetary bearing (12) has a planetary bearing connecting oil hole (12-3) machined along the radial direction. The lower end of the planetary bearing connecting oil hole (12-3) is connected to the planetary bearing center hole (12-1). The upper end of the planetary bearing connecting oil hole (12-3) is connected to the lower end of the external gear ring front bearing oil inlet hole (10-3). The middle part of the planetary bearing (12) has two planetary bearing oil inlets (12-2) arranged in parallel along the radial direction. The two planetary bearing oil inlets (12-2) 12-2) The upper end is connected to the center hole (12-1) of the planetary gear bearing, and the lower end of the two planetary gear bearing oil inlet holes (12-2) is connected to the planetary gear bearing clearance (15). The two planetary gear bodies of the planetary gear (2) are connected radially with a planetary gear radial oil hole (2-1). The upper end of the planetary gear radial oil hole (2-1) is connected to the planetary gear bearing clearance (15), and the lower end of the planetary gear radial oil hole (2-1) is connected to the planetary gear floating gear ring clearance (16). The front floating gear ring (3) and the rear floating gear ring (4) are respectively connected with a front floating gear ring connecting oil hole (3-1) and a rear floating gear ring connecting oil hole (4-1). The front floating gear ring connecting oil hole (3-1) and the rear floating gear ring connecting oil hole (4-1) are both connected to the planetary gear floating gear ring clearance (16).The rear bearing of the external gear ring (14) has an oil inlet hole (14-1) machined radially. The upper end of the oil inlet hole (14-1) is connected to the mounting surface of the gear ring shaft of the rear bearing of the external gear ring (14). One end of the vertical plate-rear bearing connecting pipe (17) is connected to the rear end of the inclined hole (8-2) of the vertical plate, and the other end of the vertical plate-rear bearing connecting pipe (17) is connected to the lower end of the oil inlet hole (14-1). The inner surface of the rear bearing of the external gear ring (14) is circumferentially connected. The outer gear ring (5) has an external gear ring rear bearing oil reservoir groove (14-2) machined in the direction of the gear ring. The front part of the gear ring shaft of the outer gear ring (5) has an external gear ring center oil hole (5-2) machined in the front part of the gear ring shaft. The front end of the external gear ring center oil hole (5-2) is connected to the front surface of the gear ring shaft. The shaft of the center wheel (1) has a center wheel center hole (1-1) machined in the axial direction. The rear end of the center wheel center hole (1-1) is connected to the rear surface of the shaft of the center wheel (1). Both center wheel bodies have a center wheel drain hole (1-2) machined in the radial direction. The lower end of the central wheel oil drain hole (1-2) is connected to the central wheel center hole (1-1), and the upper end of the central wheel oil drain hole (1-2) is connected to the side of the central wheel body. The center line of the central wheel center hole (1-1) coincides with the center line of the external gear ring wheel center oil hole (5-2). The external gear ring wheel (5) is machined with vertically arranged external gear ring wheel radial oil holes (5-1). The upper and lower ends of the external gear ring wheel radial oil holes (5-1) are connected to the shaft side surface of the gear ring wheel, respectively. The two ends of the external gear ring wheel radial oil holes (5-1) are connected to the oil reservoir ring groove (14-2) of the rear bearing of the external gear ring.

2. The compact hydraulic system with planetary gear transmission structure according to claim 1, characterized in that: For the gear surface lubrication of the center gear (1) and planetary gear (2), there are two oil circuits: the lubricating oil in the first oil circuit passes through the main oil inlet (7-1), the front cover oil outlet (7-3), the vertical plate connecting oil hole (8-1), the vertical plate ring groove (8-3), the center gear planetary gear lubrication pipe (10-1), and the center gear planetary gear spray hole (10-2) in sequence; the lubricating oil in the second oil circuit passes through the main oil inlet (7-1), the front cover oil outlet (7-3), the vertical plate connecting oil hole (8-1), the vertical plate lower inclined hole (8-2), the vertical plate-external gear ring rear bearing connecting pipe (17), the external gear ring rear bearing oil inlet (14-1), the external gear ring rear bearing oil reservoir ring groove (14-2), the external gear ring wheel radial oil hole (5-1), the external gear ring wheel center oil hole (5-2), the center gear center hole (1-1), and the center gear drain hole (1-2).

3. The compact hydraulic system with planetary gear transmission structure according to claim 2, characterized in that: The lubrication path of the rear bearing of the external gear ring (14) is as follows: main oil inlet (7-1), front cover oil outlet (7-3), vertical plate connecting oil hole (8-1), vertical plate lower inclined hole (8-2), vertical plate-external gear ring rear bearing connecting pipe (17) and external gear ring rear bearing oil inlet (14-1).

4. The compact hydraulic system with planetary gear transmission structure according to claim 3, characterized in that: The lubrication path of the planetary gear bearing (12) is as follows: main oil inlet (7-1), front cover oil outlet (7-3), vertical plate connecting oil hole (8-1), vertical plate annular groove (8-3), planetary gear bearing center hole (12-1), planetary gear bearing oil inlet (12-2) and planetary gear bearing clearance (15).

5. The compact hydraulic system with planetary gear transmission structure according to claim 4, characterized in that: For the gear surface lubrication oil path of planetary gear (2) and front floating gear ring (3) and rear floating gear ring (4): main oil inlet hole (7-1), front cover oil outlet hole (7-3), vertical plate connecting oil hole (8-1), vertical plate annular groove (8-3), planetary gear bearing center hole (12-1), planetary gear bearing oil inlet hole (12-2), planetary gear planetary gear bearing clearance (15), planetary gear radial oil hole (2-1) and planetary gear floating gear ring clearance (16).

6. The compact hydraulic system with planetary gear transmission structure according to claim 5, characterized in that: For the gear surfaces of the front floating gear ring (3), the rear floating gear ring (4) and the outer gear ring wheel (5), the following are the directions of the lubrication oil path: the main oil inlet hole (7-1), the front cover oil outlet hole (7-3), the vertical plate connecting oil hole (8-1), the vertical plate annular groove (8-3), the planetary gear bearing center hole (12-1), the planetary gear bearing oil inlet hole (12-2), the planetary gear planetary gear bearing clearance (15), the planetary gear radial oil hole (2-1), the planetary gear floating gear ring clearance (16), the front floating gear ring connecting oil hole (3-1) and the rear floating gear ring connecting oil hole (4-1), and the gear surfaces of the front floating gear ring (3), the rear floating gear ring (4) and the outer gear ring wheel (5).

7. The compact hydraulic system with planetary gear transmission structure according to claim 6, characterized in that: For the lubrication path of the front bearing of the external gear ring (13): the main oil inlet (7-1), the oil outlet of the front cover (7-3), the connecting oil hole of the vertical plate (8-1), the annular groove of the vertical plate (8-3), the center hole of the planetary gear bearing (12-1), the connecting oil hole of the planetary gear bearing (12-3), and the oil inlet of the front bearing of the external gear ring (10-3).

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