A gearbox structure with planetary gearbox

Abstract

The present invention provides a gearbox structure with a planetary gearbox, which makes the connection between two power sources and the transmission convenient and reliable, ensures that the power output will not be interrupted, and increases the output power gears to meet the needs of vehicles. It includes a coaxially arranged dual input shaft and a power output shaft, the dual input shaft includes a second hollow input shaft and a first input shaft, the first input shaft passes through the hollow inner cavity of the second hollow input shaft and is coaxially arranged, the input end of the second hollow input shaft is connected to an external second power source, the input end of the first input shaft is connected to an external first power source, the output end of the second hollow input shaft is fixedly sleeved with a second transmission gear, the output end of the first input shaft is rearward relative to the second transmission gear, and is sequentially sleeved with a power switching synchronizer and an output A gear, the output A gear is the first transmission gear, and the output end of the first input shaft and the input end of the power output shaft are arranged at intervals.

Description

Technical Field

[0001] The invention relates to the technical field of gearbox structures, and in particular to a gearbox structure with a planetary gearbox sub-box. Background Art

[0002] The output end of the existing gearbox structure is the gear output from 1 to N gears, and then the power is controlled according to the power performance, and it is generally a structure with a single input end and a single output end. With the development of the automobile industry, a dual gearbox layout has gradually emerged, and then the dual power is coupled and output, or the power is coupled at the input end of a single gearbox through a complex coupling mechanism and then connected to the single gearbox. Its structure is complex, and the connection between the power source and the gearbox is complex, and it cannot guarantee that the power output will not be interrupted. With the increase in power output demand, the existing gearbox with only 1 to N gear output cannot meet the vehicle demand. Summary of the invention

[0003] In response to the above problems, the present invention provides a gearbox structure with a planetary gearbox, which makes the connection between the two power sources and the transmission convenient and reliable, ensures that the power output will not be interrupted, and increases the output power gears to meet vehicle use needs.

[0004] A gearbox structure with a planetary gearbox, characterized in that: it includes a coaxially arranged dual input shaft and a power output shaft, the dual input shaft includes a second hollow input shaft and a first input shaft, the first input shaft passes through the hollow inner cavity of the second hollow input shaft and is coaxially arranged, the input end of the second hollow input shaft is connected to an external second power source, the input end of the first input shaft is connected to an external first power source, the output end of the second hollow input shaft is fixedly sleeved with a second transmission gear, the output end of the first input shaft is rearward relative to the second transmission gear, and is sequentially sleeved with a power switching synchronizer and an output A gear, and the output A gear is the first gear. A transmission gear, wherein the output end of the first input shaft and the input end of the power output shaft are spaced apart, the input end of the power output shaft is provided with a first synchronizer, an output B gear is arranged on a side of the first synchronizer away from the output A gear, the output B gear is sleeved on a corresponding position of the power output shaft, and the power output shaft is also correspondingly sleeved with a plurality of groups of gear output structures, each group of gear output structures includes two gear output gears and a corresponding synchronizer structure, each group of gear output structures selects a corresponding gear output gear through the synchronizer structure to output power of the corresponding gear, and the letters A and B are different natural numbers from 1 to N;

[0005] The gearbox further comprises a second intermediate shaft, wherein a second intermediate shaft transmission tooth is arranged at a position of the second intermediate shaft corresponding to the second transmission gear, a first hollow intermediate shaft is also sleeved on the second intermediate shaft, and a first intermediate shaft transmission tooth is sleeved at a position of the first hollow intermediate shaft corresponding to the output A gear tooth, corresponding intermediate transmission teeth are respectively sleeved at positions of corresponding gear output gears of the output shaft in the length direction of the first hollow intermediate shaft, and corresponding gear output gears are respectively sleeved at positions of the remaining length area of ​​the second intermediate shaft corresponding to the gear output gear, a sun gear is sleeved at one end of the output shaft close to the output housing, a planet carrier is fixedly arranged in the gearbox, and planet carrier is arranged around the outer shaft of the planet carrier corresponding to the sun gear. Wheel, one end of the radial center of the planetary carrier is provided with a side-convex auxiliary box output shaft, the outer ring of the planetary wheel is provided with a ring gear, the ring gear is fixed to the axial inner end of the connecting sleeve, and the axial outer end of the connecting sleeve is provided with a convex ring gear hollow output shaft, the auxiliary box output shaft passes through the hollow output shaft of the ring gear, the outer ring surface of the hollow output shaft of the ring gear is sleeved with an L / H gear synchronizer, the auxiliary box output shaft is fixedly sleeved with output H gear teeth, which also includes output L gear teeth, the output L gear teeth are fixed to the gearbox casing through a connecting piece, the hollow output shaft of the ring gear passes through the corresponding hole of the connecting piece, the L / H gear synchronizer is arranged at a position between the output L gear teeth and the output H gear teeth, and the L / H gear synchronizer switches the L gear and H gear output according to power demand.

[0006] It is further characterized by:

[0007] Each gear output gear is independently arranged on the output shaft, the output reverse gear teeth are meshed with the idler gear teeth, and the corresponding middle reverse gear teeth are meshed with the idler gear teeth and then meshed with the output reverse gear teeth;

[0008] When the output reverse gear and the output first gear are integrated into the same output first reverse gear, a reverse gear shaft is further arranged on the outer side of the first hollow intermediate shaft or the second intermediate shaft corresponding to the output first reverse gear, and the reverse gear shaft is provided with reverse gear teeth and idler gear teeth, and a reverse gear synchronizer is arranged between the reverse gear teeth and the idler gear teeth, the reverse gear teeth are fixedly sleeved on the reverse gear shaft and meshedly connected to the gear transmission gear with a lower gear number, the idler gear teeth are sleeved on the reverse gear shaft through a connecting sleeve and meshedly connected to the middle first gear, and the middle first gear is meshedly connected to the output first reverse gear;

[0009] All gear output gears sleeved on the output shaft are sleeved on the output shaft through a connecting sleeve;

[0010] Preferably, the output end of the first input shaft is rearwardly arranged relative to the second transmission gear, and is sequentially provided with a power switching synchronizer and an output fourth gear gear, the output end of the first input shaft and the input end of the power output shaft are spaced apart, a 2 / 4 gear synchronizer is provided at the input end of the power output shaft, an output second gear gear is arranged on the side of the 2 / 4 gear synchronizer away from the output fourth gear gear, the output second gear gear is sleeved on the corresponding position of the power output shaft, the power output shaft is also sequentially provided with an output third gear gear, an output first gear gear, and an output reverse gear gear, a 1 / 3 gear synchronizer is arranged between the output third gear gear and the output first gear gear, a reverse gear synchronizer is provided on one side of the output reverse gear gear, and it also includes A second intermediate shaft is provided, and a second intermediate shaft transmission tooth is arranged at a position of the second intermediate shaft corresponding to the second transmission gear. A first hollow intermediate shaft is also sleeved on the second intermediate shaft, and a first intermediate shaft transmission tooth is sleeved at a position of the first hollow intermediate shaft corresponding to the output fourth gear tooth. A corresponding middle transmission tooth is fixedly sleeved at a position of the output second gear tooth of the output shaft in the length direction of the first hollow intermediate shaft, and corresponding middle transmission teeth are respectively sleeved at positions of the output third gear tooth and the output first gear tooth that protrude out of the length area of ​​the first hollow intermediate shaft; the middle reverse gear is connected to the output reverse gear tooth through an idler gear tooth, and the middle reverse gear is sleeved at a corresponding position of the second intermediate shaft.

[0011] All gear output gears mounted on the output shaft are mounted on the output shaft through connecting sleeves to ensure coupled output of power during output;

[0012] All the intermediate transmission teeth are fixedly sleeved on corresponding positions of the second intermediate shaft or the first hollow intermediate shaft.

[0013] After adopting the above technical scheme, the second power source and the first power source input power through the coaxial, and a power switching synchronizer is arranged between the first transmission gear of the first input shaft and the second transmission gear of the second hollow input shaft. When the first transmission gear and the second transmission gear of the power switching synchronizer are in synchronous meshing state, the power of the second power source and the first power source is synchronously coupled and output to the corresponding intermediate transmission gear, and then transmitted to the output shaft, and the gear output is performed by selecting the corresponding gear; when the power switching synchronizer is disengaged, the second power source is transmitted to the corresponding intermediate transmission gear through the second transmission gear, and then transmitted to the output shaft, and the gear output is performed by selecting the corresponding gear, and the first power source is transmitted to the corresponding intermediate transmission gear through the first transmission gear, and then transmitted to the output shaft, and the gear output is performed by selecting the corresponding gear, and the first power and the second power are coupled on the output shaft and then output; so that the connection between the two power sources and the transmission is convenient and reliable, and the power can be selected to be coupled for output or output separately and then output on the output shaft The output is coupled on the output, which ensures that the power output will not be interrupted and the gear shifting without power interruption is realized; since the end of the output shaft is provided with a planetary reducer structure, the power is finally transmitted to the external axle through the output shaft of the auxiliary box, and when the L / H gear synchronizer engages the output L gear tooth, the ring gear and the housing are connected and fixed, so that the corresponding gear output of the output shaft is transmitted to the sun gear and then engages the corresponding planetary gear, and the planetary gear rotates along the fixed ring gear to drive the output shaft of the auxiliary box to output in L gear (low gear), and when the L / H gear synchronizer engages the output H gear tooth, the ring gear is connected to the output shaft of the auxiliary box, and the corresponding gear output of the output shaft is transmitted to the sun gear and then engages the corresponding planetary gear. Since the ring gear can rotate and the planet carrier and the ring gear are connected, the speed of the sun gear is the same as that of the planet carrier and the ring gear, that is, direct gear, and the output shaft of the auxiliary box is output in H gear (high gear), and the two-gear output of the auxiliary box can correspond to different output gears of the output shaft, so that the connection between the two power sources and the transmission is convenient and reliable, ensuring that the power output will not be interrupted, and the output power gears are increased to meet the needs of vehicle use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic block diagram of a specific embodiment of the present invention;

[0015] The names corresponding to the serial numbers in the figure are as follows:

[0016] Power output shaft 1, second hollow input shaft 2, first input shaft 3, second transmission gear 4, power switching synchronizer 5, second intermediate shaft 6, second intermediate shaft transmission gear 7, first hollow intermediate shaft 8, first intermediate shaft transmission gear 9, sun gear 10, planetary carrier 11, planetary gear 12, ring gear 13, connecting sleeve 14, ring gear hollow output shaft 15, idler gear teeth 16, middle reverse gear 17, output fourth gear gear 18, 2 / 4 gear synchronizer 19, output second gear gear 20, output third gear gear 21, output first gear gear 22, reverse gear synchronizer 23, 1 / 3 gear synchronizer 24, output reverse gear gear 25, connecting sleeve 26, gearbox housing 27, L / H gear synchronizer 28, auxiliary box output shaft 29, output H gear gear 30, output L gear gear 31, connecting piece 32. DETAILED DESCRIPTION

[0017] A gearbox structure with a planetary gearbox, see Figure 1 :It includes a coaxially arranged dual input shaft and a power output shaft 1, the dual input shaft includes a second hollow input shaft 2 and a first input shaft 3, the first input shaft 3 passes through the hollow inner cavity of the second hollow input shaft 2 and is coaxially arranged, the input end of the second hollow input shaft 2 is connected to an external second power source, the input end of the first input shaft 3 is connected to an external first power source, the output end of the second hollow input shaft 2 is fixedly sleeved with a second transmission gear 4, the output end of the first input shaft 3 is rearward relative to the second transmission gear, and is sequentially sleeved with a power switching synchronizer 5 and an output A gear, the output end of the first input shaft 3 The input end of the power output shaft 1 is arranged with an interval therebetween, the input end of the power output shaft 1 is provided with a first synchronizer, an output B gear is arranged on a side of the first synchronizer away from the output A gear, the output B gear is sleeved on a corresponding position of the power output shaft, and a plurality of groups of gear output structures are correspondingly sleeved on the power output shaft 1, each group of gear output structures includes two gear output gears and a corresponding synchronizer structure, each group of gear output structures selects a corresponding gear output gear through the synchronizer structure to output the power of the corresponding gear, and the letters A and B are different natural numbers from 1 to N;

[0018] It also includes a second intermediate shaft 6, and a second intermediate shaft transmission tooth 7 is arranged at the position of the second intermediate shaft 6 corresponding to the second transmission gear 4. A first hollow intermediate shaft 8 is also sleeved on the second intermediate shaft 6, and a first intermediate shaft transmission tooth 9 is sleeved at the position of the first hollow intermediate shaft 8 corresponding to the output A gear tooth. The first hollow intermediate shaft 8 is respectively sleeved with corresponding intermediate transmission teeth at the positions of the corresponding gear output gears of the output shaft 1 in the length direction, and the second intermediate shaft 6 is respectively sleeved with corresponding gear output gears at the positions of the remaining length areas of the first hollow intermediate shaft 8 corresponding to the gear output gears. A sun gear 10 is sleeved at one end of the output shaft 1 close to the output housing, and a planet carrier 11 is fixedly arranged in the gearbox. The planet carrier 11 is arranged with planetary gears 12 on the outer shaft ring corresponding to the sun gear 10, and the radial direction of the planet carrier 11 A side-convex auxiliary box output shaft 29 is provided at one end of the center, and a ring gear 13 is provided on the outer ring of the planetary gear 12. The ring gear 13 is fixedly arranged at the axial inner end of the connecting sleeve 14, and a convex hollow output shaft 15 of the ring gear is provided at the axial outer end of the connecting sleeve 14. The auxiliary box output shaft 29 passes through the hollow output shaft 15 of the ring gear, and the outer ring surface of the hollow output shaft 15 of the ring gear is sleeved with an L / H gear synchronizer 28. The auxiliary box output shaft 29 is fixedly sleeved with an output H gear 30, which also includes an output L gear 31. The output L gear 31 is fixedly connected to the gearbox housing 27 through a connecting piece 32, and the hollow output shaft 15 of the ring gear passes through the corresponding hole of the connecting piece 32. The L / H gear synchronizer 28 is arranged between the output L gear 31 and the output H gear 30, and the L / H gear synchronizer 28 switches the output between the L gear and the H gear according to the power demand.

[0019] Each gear output gear is independently arranged on the output shaft 1, the output reverse gear teeth 25 are meshed with the idler gear teeth 16, and the corresponding middle reverse gear teeth 17 are meshed with the idler gear teeth 16 and then meshed with the output reverse gear teeth 25;

[0020] When the output reverse gear and the output first gear are integrated into the same output first reverse gear, a reverse gear shaft is further arranged on the outer side of the first hollow intermediate shaft or the second intermediate shaft corresponding to the output first reverse gear, and the reverse gear shaft is provided with reverse gear teeth and idler gear teeth, and a reverse gear synchronizer is arranged between the reverse gear teeth and the idler gear teeth, the reverse gear teeth are fixedly sleeved on the reverse gear shaft and meshedly connected to the gear transmission gear with a lower gear number, the idler gear teeth are sleeved on the reverse gear shaft through a connecting sleeve and meshedly connected to the middle first gear, and the middle first gear is meshedly connected to the output first reverse gear;

[0021] All gear output gears mounted on the output shaft are mounted on the output shaft through a connecting sleeve;

[0022] In a specific embodiment, the output end of the first input shaft 3 is rearwardly arranged relative to the second transmission gear, and is sequentially provided with a power switching synchronizer 5 and an output fourth gear tooth 18. The output end of the first input shaft 3 and the input end of the power output shaft 1 are spaced apart, and a 2 / 4 gear synchronizer 19 is provided at the input end of the power output shaft 1. An output second gear tooth 20 is arranged on the side of the 2 / 4 gear synchronizer 19 away from the output fourth gear tooth 18, and the output second gear tooth 20 is sleeved on the corresponding position of the power output shaft 1. The power output shaft 1 is also sequentially provided with an output third gear tooth 21, an output first gear tooth 22, and an output reverse gear tooth 25. A 1 / 3 gear synchronizer 24 is arranged between the output third gear tooth 21 and the output first gear tooth 22, and a reverse gear is arranged on one side of the output reverse gear tooth 25. The gear synchronizer 23 also includes a second intermediate shaft 6. A second intermediate shaft transmission tooth 7 is provided at a position of the second intermediate shaft 6 corresponding to the second transmission gear 4. A first hollow intermediate shaft 8 is also sleeved on the second intermediate shaft 6. The first hollow intermediate shaft 8 is sleeved with a first intermediate shaft transmission tooth 9 at a position corresponding to the output fourth gear tooth 18. A corresponding intermediate transmission tooth is fixedly sleeved at a position corresponding to the output second gear tooth 20 in the length direction of the first hollow intermediate shaft 8. The second intermediate shaft 6 is sleeved with corresponding intermediate transmission teeth at positions corresponding to the output third gear tooth 21 and the output first gear tooth 22 protruding from the length area of ​​the first hollow intermediate shaft 8; the intermediate reverse gear 17 is connected to the output reverse gear tooth 25 through the idler gear tooth 16, and the intermediate reverse gear 17 is sleeved at a corresponding position of the second intermediate shaft 6.

[0023] All gear output gears mounted on the output shaft 1 are mounted on the output shaft 1 through the connecting sleeve 26 to ensure the coupled output of power during output;

[0024] All the intermediate transmission teeth are fixedly sleeved on corresponding positions of the second intermediate shaft 6 or the first hollow intermediate shaft 8 .

[0025] In specific operation, when the power switching synchronizer is closed to the left, the second power source is coupled with the first power source, so that the first power source can realize all gear transmission; when the power switching synchronizer is opened, the power output of the second power source and the first power source is coupled on the output shaft, so that there is no power interruption in the gear shifting process of the transmission. For example, the first power source passes through the output fourth gear teeth, and the 2 / 4 gear synchronizer is engaged to the right into the second gear, and the first power source transmits torque in the second gear; the second power source passes through the constant mesh gear, and the 1 / 3 gear synchronizer is engaged to the right into the first gear, and the second power source runs in the first gear, and the two powers are coupled on the output shaft; when shifting gears, the first power source first disengages the 2 / 4 gear synchronizer and engages in the fourth gear. During the process, the second power source always outputs power, and then the second power source disengages from the gear and engages in the third gear. During this process, the first power source always outputs power, thereby realizing gear shifting without power interruption; due to the output A planetary reducer structure is provided at the end of the shaft, and the power is finally transmitted to the external axle through the output shaft of the auxiliary box. When the L / H gear synchronizer engages to output the L gear tooth, the ring gear and the housing are connected and fixed, so that the corresponding gear output of the output shaft is transmitted to the sun gear and then engages the corresponding planetary gear, and the planetary gear rotates along the fixed ring gear to drive the output shaft of the auxiliary box to output in L gear (low gear). When the L / H gear synchronizer engages to output the H gear tooth, the ring gear and the output shaft of the auxiliary box are connected, and the corresponding gear output of the output shaft is transmitted to the sun gear and then engages the corresponding planetary gear. Since the ring gear can rotate and the planetary carrier and the ring gear are connected, the sun gear speed is the same as the planetary carrier and the ring gear, that is, direct gear, and the output shaft of the auxiliary box is output in H gear (high gear). Both gear outputs of the auxiliary box can correspond to different output gears of the output shaft, making the connection between the two power sources and the transmission convenient and reliable, ensuring that the power output will not be interrupted, and the output power gears are increased to meet the needs of vehicle use.

[0026] The gear arrangement of the specific embodiment is not limited to the specific implementation sequence combination.

[0027] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A gearbox structure with a planetary gearbox, characterized in that: It includes a coaxially arranged dual input shaft and a power output shaft, the dual input shaft includes a second hollow input shaft and a first input shaft, the first input shaft passes through the hollow inner cavity of the second hollow input shaft and is coaxially arranged, the input end of the second hollow input shaft is connected to an external second power source, the input end of the first input shaft is connected to an external first power source, the output end of the second hollow input shaft is fixedly sleeved with a second transmission gear, the output end of the first input shaft is rearward relative to the second transmission gear, and is sequentially sleeved with a power switching synchronizer and an output A gear, the output A gear is the first transmission gear, and the first input shaft The output end of the power output shaft and the input end of the power output shaft are arranged at intervals, and the input end of the power output shaft is provided with a first synchronizer, and an output B gear is arranged on the side of the first synchronizer away from the output A gear, and the output B gear is sleeved on the corresponding position of the power output shaft, and the power output shaft is also correspondingly sleeved with a plurality of groups of gear output structures, each group of gear output structures includes two gear output gears and a corresponding synchronizer structure, and each group of gear output structures selects a corresponding gear output gear through the synchronizer structure to output the power of the corresponding gear, and the letters A and B are different natural numbers from 1 to N; The gearbox further comprises a second intermediate shaft, wherein a second intermediate shaft transmission tooth is arranged at a position of the second intermediate shaft corresponding to the second transmission gear, a first hollow intermediate shaft is also sleeved on the second intermediate shaft, and a first intermediate shaft transmission tooth is sleeved at a position of the first hollow intermediate shaft corresponding to the output A gear tooth, corresponding intermediate transmission teeth are respectively sleeved at positions of corresponding gear output gears of the output shaft in the length direction of the first hollow intermediate shaft, and corresponding gear output gears are respectively sleeved at positions of the remaining length area of ​​the second intermediate shaft corresponding to the gear output gear, a sun gear is sleeved at one end of the output shaft close to the output housing, a planet carrier is fixedly arranged in the gearbox, and planet carrier is arranged around the outer shaft of the planet carrier corresponding to the sun gear. Wheel, one end of the radial center of the planetary carrier is provided with a side-convex auxiliary box output shaft, the outer ring of the planetary wheel is provided with a ring gear, the ring gear is fixed to the axial inner end of the connecting sleeve, and the axial outer end of the connecting sleeve is provided with a convex ring gear hollow output shaft, the auxiliary box output shaft passes through the hollow output shaft of the ring gear, the outer ring surface of the hollow output shaft of the ring gear is sleeved with an L / H gear synchronizer, the auxiliary box output shaft is fixedly sleeved with output H gear teeth, which also includes output L gear teeth, the output L gear teeth are fixed to the gearbox casing through a connecting piece, the hollow output shaft of the ring gear passes through the corresponding hole of the connecting piece, the L / H gear synchronizer is arranged at a position between the output L gear teeth and the output H gear teeth, and the L / H gear synchronizer switches the L gear and H gear output according to power demand.

2. A gearbox structure with a planetary gearbox as claimed in claim 1, characterized in that: Each gear output gear is independently arranged on the output shaft, the output reverse gear teeth are meshed with the idler gear teeth, and the corresponding middle reverse gear teeth are meshed with the idler gear teeth and then meshed with the output reverse gear teeth.

3. A gearbox structure with a planetary gearbox as claimed in claim 1, characterized in that: When the output reverse gear and the output first gear gear are integrated into the same output first reverse gear gear, a reverse gear shaft is also arranged on the outer side of the first hollow intermediate shaft or the second intermediate shaft corresponding to the output first reverse gear gear, and reverse gear gear and idler gear teeth are arranged on the reverse gear shaft, and a reverse gear synchronizer is arranged between the reverse gear gear and the idler gear teeth, the reverse gear gear is fixedly sleeved on the reverse gear shaft and meshedly connected to the gear transmission gear with a lower gear number, the idler gear tooth is sleeved on the reverse gear shaft through a connecting sleeve and meshedly connected to the middle first gear, and the middle first gear is meshedly connected to the output first reverse gear gear.

4. A gearbox structure with a planetary gearbox as claimed in claim 1, characterized in that: All the gear output gears sleeved on the output shaft are sleeved on the output shaft through a connecting sleeve.

5. The gearbox structure with a planetary gearbox as claimed in claim 1, characterized in that: The output end of the first input shaft is arranged rearward relative to the second transmission gear, and is sequentially sleeved with a power switching synchronizer and an output fourth gear gear. The input end of the power output shaft is provided with a 2 / 4 gear synchronizer. The side of the 2 / 4 gear synchronizer away from the output fourth gear gear is provided with an output second gear gear. The output second gear gear is sleeved on a corresponding position of the power output shaft. The power output shaft is also sequentially sleeved with output third gear gear, output first gear gear, and output reverse gear gear. A 1 / 3 gear synchronizer is arranged between the output third gear gear and the output first gear gear. A reverse gear synchronizer is arranged on one side of the output reverse gear gear. The first hollow intermediate shaft is sleeved with a first intermediate shaft transmission gear corresponding to the position of the output fourth gear gear. The first hollow intermediate shaft is sleeved with a corresponding middle transmission gear at a position corresponding to the output second gear gear of the output shaft in the length direction. The second intermediate shaft is sleeved with corresponding middle transmission gears at positions corresponding to the output third gear gear and the output first gear gear that protrude from the length area of ​​the first hollow intermediate shaft. The middle reverse gear is connected to the output reverse gear gear through an idler gear tooth, and the middle reverse gear is sleeved on a corresponding position of the second intermediate shaft.

6. A gearbox structure with a planetary gearbox as claimed in claim 5, characterized in that: All the gear output gears sleeved on the output shaft are sleeved on the output shaft through a connecting sleeve.

7. The gearbox structure with a planetary gearbox as claimed in claim 5, characterized in that: All the intermediate transmission teeth are fixedly sleeved on corresponding positions of the second intermediate shaft or the first hollow intermediate shaft.

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