Novel planetary differential gear box

Abstract

The novel planetary differential gear box comprises a gear box body, an input shaft system, a second-stage gear, a planetary assembly and a double-output shaft system, the input shaft system is arranged in the gear box body and used for power input, the second-stage gear is arranged on the side, close to the input shaft system, in the gear box body and used for power transmission, and the planetary assembly is arranged on the second-stage gear and used for power transmission. The double-output shaft system is arranged in the middle of the planetary assembly and used for output synchronization of the double-output shaft system. The two-stage gear and the planetary assembly are matched to perform transmission on the double-output shaft system, the problem that two wheels are asynchronous due to machining errors or different use abrasion degrees of the two wheels is effectively solved, the situation that the service life of the gearbox is shortened due to stress of one wheel is prevented, the stability of the gearbox during operation is greatly improved, and the service life of the gearbox during operation is greatly prolonged. And operation requirements are met.

Description

Technical Field

[0001] The present invention belongs to the technical field of gearboxes, and particularly relates to a new type of planetary differential gearbox. Background Art

[0002] The gearbox in the running mechanism is an essential device for power output. During use, when there are machining errors or different wear degrees between the two wheels, the problem of the two wheels being asynchronous will occur. At this time, the forces on the two wheels are uneven, resulting in a reduced service life of the gearbox.

[0003] Therefore, in view of the above characteristics of wheel asynchrony and reduced gearbox life, it is necessary to provide a new type of planetary differential gearbox to solve the above technical problems. Summary of the Invention

[0004] To at least partially solve the technical problems existing in the above prior art, the present invention provides a new type of planetary differential gearbox.

[0005] The new type of planetary differential gearbox of the present invention includes a gearbox body, an input shaft system, a secondary gear, a planetary assembly, and a double output shaft system. The input shaft system is arranged inside the gearbox body for power input. The secondary gear is arranged inside the gearbox body on one side close to the input shaft system for power transmission. The planetary assembly is arranged on the secondary gear. The double output shaft system is arranged in the middle of the planetary assembly for synchronous output of the double output shaft system, wherein:

[0006] The planetary assembly includes a planet carrier, a first planet gear, a second planet gear, a third planet gear, and a fourth planet gear. The first planet gear, the second planet gear, the third planet gear, and the fourth planet gear are all arranged on the planet carrier. The first planet gear is in transmission connection with the second planet gear. The third planet gear is in transmission connection with the fourth planet gear;

[0007] The double output shaft system includes an output shaft, a first sun gear, a second sun gear, a first output transmission assembly, and a second output transmission assembly. The first sun gear is rotatably arranged at one end of the output shaft. The second sun gear is rotatably arranged at the other end of the output shaft. The first output transmission assembly is arranged on one side of the first sun gear. The second output transmission assembly is arranged on one side of the second sun gear. The first sun gear and the second sun gear have the same number of teeth.

[0008] Further, in the above new type of planetary differential gearbox, the secondary gear is in gear meshing with the input shaft system, and the end face of the secondary gear is fixedly connected to the planet carrier by bolts.

[0009] Furthermore, in the above-mentioned new planetary differential gearbox, the first planetary gear includes a first gear shaft and a first gear, the first gear shaft is fixedly connected to the planetary carrier, the first gear is rotatably set on the first gear shaft, the first gear is a double-row gear, and the first row of teeth in the first gear is meshed with a gear at one end of the first sun gear.

[0010] Furthermore, in the above-mentioned new planetary differential gearbox, the second planetary gear includes a second gear shaft and a second gear, the second gear shaft is fixedly connected to the planetary carrier, the second gear is rotatably set on the second gear shaft, the second gear is a double-row gear, the first row of teeth in the second gear is meshed with the gear at one end of the second sun gear, and the second row of teeth in the second gear is meshed with the second row of teeth in the first gear.

[0011] Furthermore, in the above-mentioned new planetary differential gearbox, the third planetary gear includes a third gear shaft and a third gear, the third gear shaft is fixedly connected to the planetary carrier, the third gear is rotatably arranged on the third gear shaft, the third gear is a double-row gear, and the first row of teeth in the third gear is meshed with a gear at one end of the second sun gear.

[0012] Furthermore, in the above-mentioned new planetary differential gearbox, the fourth planetary gear includes a fourth gear shaft and a fourth gear, the fourth gear shaft is fixedly connected to the planetary carrier, the fourth gear is rotatably arranged on the fourth gear shaft, the fourth gear is a double-row gear, the first row of teeth in the fourth gear is meshed with the gear at one end of the first sun gear, and the second row of teeth in the fourth gear is meshed with the second row of teeth in the third gear.

[0013] Furthermore, in the above-mentioned novel planetary differential gearbox, the first gear, the second gear, the third gear and the fourth gear have the same number of teeth.

[0014] Furthermore, in the above-mentioned new planetary differential gearbox, the first output transmission assembly includes a first output transmission shaft and a first output transmission tooth, the first output transmission shaft is rotationally connected to the gearbox body, the first output transmission tooth is key-connected to the first output transmission shaft, and the first output transmission tooth is meshed with the first sun gear.

[0015] Furthermore, in the above-mentioned new planetary differential gearbox, the second output transmission assembly includes a second output transmission shaft and a second output transmission tooth, the second output transmission shaft is rotationally connected to the gearbox body, the second output transmission tooth is key-connected to the second output transmission shaft, and the second output transmission tooth is meshed with the second sun gear.

[0016] The novel planetary differential gearbox of the present invention has the following advantages and beneficial effects:

[0017] The present invention adopts a two-stage gear and a planetary assembly to cooperate with the dual output shaft system transmission, which effectively solves the problem of the two wheels being out of sync due to processing errors or different degrees of wear of the two wheels, prevents the life of the gearbox from being reduced due to the force on one wheel, greatly improves the stability and service life of the gearbox during operation, and meets the operation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings in the following descriptions are only used to further understand the embodiments of the present invention and constitute a part of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0019] Figure 1 It is a structural schematic diagram of a novel planetary differential gearbox of the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the AA section structure along the middle;

[0021] Figure 3 for Figure 1 Schematic diagram of the BB section structure along the middle;

[0022] Figure 4 for Figure 1 Schematic diagram of the CC section structure along the middle edge;

[0023] Figure 5 It is a schematic diagram of the principle of the novel planetary differential gearbox of the present invention.

[0024] Description of reference numerals:

[0025] 1: Gear box; 2: Input shaft system; 3: Secondary gear;

[0026] 4: planetary assembly, 41: planetary carrier;

[0027] 42: first planetary gear, 421: first gear shaft, 422: first gear;

[0028] 43: second planetary gear, 431: second gear shaft, 432: second gear;

[0029] 44: third planetary gear, 441: third gear shaft, 442: third gear;

[0030] 45: fourth planetary gear, 451: fourth gear shaft, 452: fourth gear;

[0031] 5: dual output shaft system, 51: output shaft, 52: first sun gear, 53: second sun gear;

[0032] 54: first output transmission assembly, 541: first output transmission shaft, 542: first output transmission gear;

[0033] 55: second output transmission assembly, 551: second output transmission shaft, 552: second output transmission gear. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] like Figures 1 to 4 As shown, the novel planetary differential gearbox of the present invention comprises a gearbox body 1, an input shaft system 2, a secondary gear 3, a planetary assembly 4 and a dual output shaft system 5, wherein the input shaft system 2 is arranged in the gearbox body 1 for power input, the secondary gear 3 is arranged in the gearbox body 1 close to the input shaft system 2 for power transmission, the planetary assembly 4 is arranged on the secondary gear 3, and the dual output shaft system 5 is arranged in the middle of the planetary assembly 4 for output synchronization of the dual output shaft system 5, wherein:

[0036] The planetary assembly 4 includes a planetary carrier 41, a first planetary gear 42, a second planetary gear 43, a third planetary gear 44 and a fourth planetary gear 45. The first planetary gear 42, the second planetary gear 43, the third planetary gear 44 and the fourth planetary gear 45 are all arranged on the planetary carrier 41, the first planetary gear 42 is drivingly connected to the second planetary gear 43, and the third planetary gear 44 is drivingly connected to the fourth planetary gear 45;

[0037] The dual output shaft system 5 includes an output shaft 51, a first sun gear 52, a second sun gear 53, a first output transmission assembly 54 and a second output transmission assembly 55. The first sun gear 52 is rotatably arranged at one end of the output shaft 51, and the second sun gear 53 is rotatably arranged at the other end of the output shaft 51. The first output transmission assembly 54 is arranged on one side of the first sun gear 52, and the second output transmission assembly 55 is arranged on one side of the second sun gear 53. The number of teeth of the first sun gear 52 and the second sun gear 53 are equal.

[0038] Furthermore, in the novel planetary differential gearbox of the present invention, the secondary gear 3 is meshed with the input shaft system 2, and the end face of the secondary gear 3 is fixedly connected to the planet carrier 41 by bolts, so that the secondary gear 3 is driven to rotate through the input shaft system 2 and drives the planet carrier 41 to rotate.

[0039] Furthermore, in the new planetary differential gearbox of the present invention, the first planetary gear 42 includes a first gear shaft 421 and a first gear 422. The first gear shaft 421 is fixedly connected to the planetary carrier 41. The first gear 422 is rotatably arranged on the first gear shaft 421. The first gear 422 is a double-row gear. The first row of teeth in the first gear 422 is meshed with a gear at one end of the first sun gear 52.

[0040] Furthermore, in the new planetary differential gearbox of the present invention, the second planetary gear 43 includes a second gear shaft 431 and a second gear 432. The second gear shaft 431 is fixedly connected to the planet carrier 41. The second gear 432 is rotatably arranged on the second gear shaft 431. The second gear 432 is a double-row gear. The first row of teeth in the second gear 432 is meshed with a gear at one end of the second sun gear 53, and the second row of teeth in the second gear 432 is meshed with the second row of teeth in the first gear 422.

[0041] Furthermore, in the new planetary differential gearbox of the present invention, the third planetary gear 44 includes a third gear shaft 441 and a third gear 442. The third gear shaft 441 is fixedly connected to the planet carrier 41. The third gear 442 is rotatably set on the third gear shaft 441. The third gear 442 is a double-row gear. The first row of teeth in the third gear 442 is meshed with a gear at one end of the second sun gear 53.

[0042] Furthermore, in the novel planetary differential gearbox of the present invention, the fourth planetary gear 45 includes a fourth gear shaft 451 and a fourth gear 452. The fourth gear shaft 451 is fixedly connected to the planet carrier 41. The fourth gear 452 is rotatably set on the fourth gear shaft 451. The fourth gear 452 is a double-row gear. The first row of teeth in the fourth gear 452 is meshed with a gear at one end of the first sun gear 52, and the second row of teeth in the fourth gear 452 is meshed with a second row of teeth in the third gear 442.

[0043] Furthermore, in the novel planetary differential gearbox of the present invention, the first gear 422, the second gear 432, the third gear 442 and the fourth gear 452 have the same number of teeth, so that the first gear 422, the second gear 432, the third gear 442 and the fourth gear 452 are double-linked, and while meshing with the first sun gear 52 and the second sun gear 53, they also mesh with the paired planetary gears. When the two wheels are out of sync, they are synchronized due to the action of the double-linked planetary gears.

[0044] Furthermore, in the novel planetary differential gearbox of the present invention, the first output transmission assembly 54 includes a first output transmission shaft 541 and a first output transmission tooth 542, the first output transmission shaft 541 is rotationally connected to the gearbox body 1, the first output transmission tooth 542 is key-connected to the first output transmission shaft 541, and the first output transmission tooth 542 is gear-engaged with the first sun gear 52, thereby transmitting the output power of the first sun gear 52 out of the gearbox body 1.

[0045] Furthermore, in the novel planetary differential gearbox of the present invention, the second output transmission assembly 55 includes a second output transmission shaft 551 and a second output transmission tooth 552, the second output transmission shaft 551 is rotationally connected to the gearbox body 1, the second output transmission tooth 552 is key-connected to the second output transmission shaft 551, and the second output transmission tooth 552 is gear-engaged with the second sun gear 53, thereby transmitting the output power of the second sun gear 53 out of the gearbox body 1.

[0046] The working principle of the new planetary differential gearbox is:

[0047] like Figure 5 As shown, by applying the relative speed method, the system is given the opposite secondary gear speed nx, then there are three pairs of meshing from the first sun gear to the second sun gear. Considering that the number of teeth of the first sun gear and the second sun gear Za=Zb, the speed ratio in the conversion mechanism is:

[0048]

[0049] Among them, n x is the rotation speed of the secondary gear, Z a is the number of teeth of the first sun gear, Z b is the number of teeth of the second sun gear, Z c is the number of teeth of the first gear, the second gear, the third gear and the fourth gear, na is the number of revolutions of the first sun gear, and nb is the number of revolutions of the second sun gear.

[0050] Solved: n a +n b =2n x

[0051] In an ideal situation:

[0052] n a0 =n b0 =n x ;

[0053] n b0 =2n x -n a0 =n x ;

[0054] Among them, n a0 is the number of revolutions of the first sun gear under ideal conditions, nb0 is the number of revolutions of the second sun gear under ideal conditions.

[0055] If the two wheels have different diameters due to manufacturing or uneven wear, and the vehicle is to travel at the same speed, then at the original speed, the wheel with a smaller diameter has a lower linear speed, slips, and tends to speed up. Let the speed increment be n. Δ , transmitted to another wheel through the connected planetary assembly, reducing the number of revolutions n Δ Tendency, the speed increment direction

[0056] To n Δ The opposite is true for the first and second sun gears.

[0057] Their revolutions are:

[0058] n′ a =n a0 +n Δ =n x +n Δ ;

[0059] n′ b =2n x -(n x +n Δ )=n x -n Δ ;

[0060] Among them, n′ a is the number of revolutions of the first sun gear when the diameters of the two wheels are different, n′ b It is the number of revolutions of the second sun gear when the diameters of the two wheels are different.

[0061] This ensures that the linear speeds of the two wheels are the same.

[0062] In summary, compared with the prior art, the new planetary differential gearbox of the present invention has the following advantages and beneficial effects: the present invention adopts a two-stage gear and a planetary assembly to cooperate with the dual output shaft system to transmit, which effectively solves the problem of the two wheels being out of sync due to processing errors or different degrees of wear of the two wheels, prevents the life of the gearbox from being reduced due to the force on one wheel, greatly improves the stability and service life of the gearbox during operation, and meets the operation requirements.

[0063] It should be noted that, in this article, unless otherwise clearly specified and limited, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A new type of planetary differential gearbox, characterized in that: The novel planetary differential gearbox comprises a gearbox, an input shaft system, a secondary gear, a planetary assembly and a dual output shaft system, wherein the input shaft system is arranged in the gearbox for power input, the secondary gear is arranged in the gearbox on a side close to the input shaft system for power transmission, the planetary assembly is arranged on the secondary gear, and the dual output shaft system is arranged in the middle of the planetary assembly for output synchronization of the dual output shaft system, wherein: The planetary assembly comprises a planetary carrier, a first planetary gear, a second planetary gear, a third planetary gear and a fourth planetary gear, wherein the first planetary gear, the second planetary gear, the third planetary gear and the fourth planetary gear are all arranged on the planetary carrier, the first planetary gear is drivingly connected with the second planetary gear, and the third planetary gear is drivingly connected with the fourth planetary gear; The dual output shaft system includes an output shaft, a first sun gear, a second sun gear, a first output transmission assembly and a second output transmission assembly. The first sun gear is rotatably arranged at one end of the output shaft, and the second sun gear is rotatably arranged at the other end of the output shaft. The first output transmission assembly is arranged on one side of the first sun gear, and the second output transmission assembly is arranged on one side of the second sun gear. The first sun gear has the same number of teeth as the second sun gear.

2. The novel planetary differential gearbox according to claim 1 is characterized in that: The secondary gear is meshed with the input shaft system gear, and the end face of the secondary gear is fixedly connected to the planet carrier by bolts.

3. The novel planetary differential gearbox according to claim 1 is characterized in that: The first planetary gear includes a first gear shaft and a first gear, the first gear shaft is fixedly connected to the planet carrier, the first gear is rotatably arranged on the first gear shaft, the first gear is a double-row gear, and the first row of teeth in the first gear is meshed with a gear at one end of the first sun gear.

4. The novel planetary differential gearbox according to claim 3 is characterized in that: The second planetary gear includes a second gear shaft and a second gear. The second gear shaft is fixedly connected to the planet carrier. The second gear is rotatably set on the second gear shaft. The second gear is a double-row gear. The first row of teeth in the second gear is meshed with a gear at one end of the second sun gear, and the second row of teeth in the second gear is meshed with the second row of teeth in the first gear.

5. The novel planetary differential gearbox according to claim 4 is characterized in that: The third planetary gear includes a third gear shaft and a third gear. The third gear shaft is fixedly connected to the planetary carrier. The third gear is rotatably arranged on the third gear shaft. The third gear is a double-row gear. The first row of teeth in the third gear is meshed with a gear at one end of the second sun gear.

6. The novel planetary differential gearbox according to claim 5 is characterized in that: The fourth planetary gear includes a fourth gear shaft and a fourth gear. The fourth gear shaft is fixedly connected to the planet carrier. The fourth gear is rotatably arranged on the fourth gear shaft. The fourth gear is a double-row gear. The first row of teeth in the fourth gear is meshed with a gear at one end of the first sun gear, and the second row of teeth in the fourth gear is meshed with the second row of teeth in the third gear.

7. The novel planetary differential gearbox according to claim 6 is characterized in that: The first gear, the second gear, the third gear and the fourth gear have the same number of teeth.

8. The novel planetary differential gearbox according to claim 1 is characterized in that: The first output transmission assembly includes a first output transmission shaft and a first output transmission tooth. The first output transmission shaft is rotatably connected to the gear box body. The first output transmission tooth is key-connected to the first output transmission shaft. The first output transmission tooth is meshed with the first sun gear.

9. The novel planetary differential gearbox according to claim 1 is characterized in that: The second output transmission assembly includes a second output transmission shaft and a second output transmission tooth, the second output transmission shaft is rotatably connected to the gear box, the second output transmission tooth is key-connected to the second output transmission shaft, and the second output transmission tooth is meshed with the second sun gear.

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