CN113124134A - Multi-shaft power split load balancing mechanism with normally meshed gears floating radially and freely - Google Patents

Multi-shaft power split load balancing mechanism with normally meshed gears floating radially and freely Download PDF

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Publication number
CN113124134A
CN113124134A CN202110426287.4A CN202110426287A CN113124134A CN 113124134 A CN113124134 A CN 113124134A CN 202110426287 A CN202110426287 A CN 202110426287A CN 113124134 A CN113124134 A CN 113124134A
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CN
China
Prior art keywords
input shaft
floating
gear
shaft
normally meshed
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CN202110426287.4A
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Chinese (zh)
Inventor
孔子豪
张志刚
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Ruitian Technology Sanya Co ltd
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Ruitian Technology Sanya Co ltd
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Priority to CN202110426287.4A priority Critical patent/CN113124134A/en
Publication of CN113124134A publication Critical patent/CN113124134A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/0018—Shaft assemblies for gearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)

Abstract

The invention discloses a multi-shaft power dividing and load balancing mechanism with a normally meshed gear capable of floating radially, which comprises an input shaft 1, an input shaft fixing bearing 2, an intermediate connecting piece and an input shaft normally meshed gear 4, wherein the load balancing mechanism can ensure that the input shaft normally meshed gear can float freely on an end face perpendicular to the axis of the input shaft while transmitting torque. The load balancing mechanism can ensure that the input shaft constantly-meshed gear can freely float on the end surface vertical to the axis of the input shaft while transmitting torque, and ensure that the multi-shaft power distribution is uniform.

Description

Multi-shaft power split load balancing mechanism with normally meshed gears floating radially and freely
Technical Field
The invention relates to the technical field of speed change mechanisms, in particular to a multi-shaft power split load balancing mechanism with normally meshed gears floating radially and freely.
Background
The traditional double-intermediate-shaft shunting technology is a typical scheme in a heavy-duty automobile transmission structure, and both a TRAXON transmission with a ZF most advanced three-section structure and a two-section ENDURANT transmission with an EATON most advanced structure adopt a main and auxiliary box double-intermediate-shaft layout; part of the heavy-duty speed changer adopts a planetary mechanism as an auxiliary box, and a main box adopts a double-intermediate-shaft structure. The traditional double-intermediate-shaft transmission has the advantages of strong bearing capacity, compact structure, light weight, light gear shifting and the like.
However, in order to achieve power split in a conventional dual-countershaft transmission, the output shaft of the main box and the gear gears on the output shaft must be designed to be in a radial floating structure, the output shaft is a cantilever beam, and the gears on the output shaft are in a radial floating state. The advantage is that gear gears on the output shaft can guarantee that gear gears on two jackshafts atress is even when radially floating. The floating structure causes the friction element of the synchronizer to generate unbalance loading when the synchronizer is engaged in a gear, so that the service life of the synchronizer can not reach 22 ten thousand times (equivalent to 100 ten thousand kilometers) of the national standard requirement; or the synchronizer has enough service life but poor load balancing, so that the service life of a gear bearing or a spline is insufficient. I.e., the load sharing and synchronizer life are a pair of spears. The large bearing capacity cannot be ensured, and the gear shifting is reliable and light.
Disclosure of Invention
Therefore, the invention provides a multi-shaft power-dividing load-sharing mechanism with a normally meshed gear floating radially and freely, which aims to solve the problems that in the prior art, the output shaft of a traditional double-intermediate-shaft speed change device and a gear on the output shaft float, so that the service life of a synchronizer is short, the service life of a meshing sleeve is short, or the service life of a gear bearing is short due to poor load sharing.
In order to achieve the above purpose, the invention provides the following technical scheme:
according to the invention, the multi-shaft power splitting load balancing mechanism with the normally meshed gear capable of radially floating freely comprises an input shaft, an input shaft fixed bearing, an intermediate connecting piece and an input shaft normally meshed gear, wherein the input shaft normally meshed gear can transmit torque and ensure that the input shaft normally meshed gear can float freely on an end face perpendicular to the axis of the input shaft.
Further, the middle connecting piece comprises a floating connecting sleeve, and the input shaft is connected with the shell through the input shaft fixed bearing; the floating connecting sleeve is connected with the input shaft; the floating connecting sleeve is connected with the input shaft constant mesh gear.
Furthermore, the middle connecting piece comprises an elastic torsion sheet, and the input shaft is connected with the shell through the input shaft fixing bearing; the elastic torsion piece is fixed in the circumferential groove of the input shaft, a certain gap is formed between the elastic torsion piece and the inner groove of the input shaft normally-meshed gear, and when the elastic torsion piece rotates, torque is transmitted through one side of the inner groove.
Further, the floating connection sleeve and the input shaft are coupled together by means of crowned teeth, and the floating connection sleeve and the input shaft constant mesh gear are coupled together by means of crowned teeth.
Furthermore, the connection mode of the two ends of the floating connecting sleeve comprises connection by adopting an involute drum spline or a rectangular drum spline.
Further, the crowned teeth comprise an inner drum or an outer drum, and the connecting surface of the crowned teeth comprises a single-segment or multi-segment circular arc.
The invention has the following advantages:
the invention can achieve the effect of uniform load and shunt by the radial floating of the input shaft constant mesh gear. The input shaft constantly meshing gear ensures that it floats freely on an end face perpendicular to the axis of the input shaft while transmitting torque. The invention is applied to the existing double-intermediate-shaft transmission, can cancel the radial floating of the output shaft and the radial floating of gears of all gears, and ensures that the traditional synchronizer can reach the service life required by users while the intermediate shafts are loaded uniformly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a schematic illustration of an input shaft assembly of a dual countershaft transmission of the prior art;
FIG. 2 is a schematic illustration of an input shaft assembly of a load leveling mechanism, according to an exemplary embodiment;
FIG. 3 is a schematic illustration of an input shaft assembly of a load leveling mechanism according to another exemplary embodiment;
FIG. 4 is a structural schematic diagram of an end cross-section of the input shaft assembly of FIG. 3;
FIG. 5 is a structural schematic diagram of another state of an end cross-section of the input shaft assembly of FIG. 3;
FIG. 6 is a schematic view of an involute drum shape;
FIG. 7 is a schematic structural diagram of an exemplary eight speed two-range dual countershaft range section transmission assembly;
FIG. 8 is a schematic structural diagram of an eight speed two-stage planetary range transmission assembly according to an exemplary embodiment;
in the figure: 1. an input shaft; 2. an input shaft fixed bearing; 3. a floating connecting sleeve; 4. the input shaft is normally meshed with the gear; 5. a housing; 6. an elastic torsion piece; 7. a main box output shaft; 8. an auxiliary box intermediate shaft; 9. a first subtank synchronizer; 10. an auxiliary box output shaft; 11. an auxiliary case sun gear; 12. a second sub-tank synchronizer; 13. a sub-tank planet carrier; 14. a sub-tank gear ring; 15. a second main box intermediate shaft assembly; 16. a first main box intermediate shaft assembly; 17. a bearing; 18. bagging a bearing; 19. a gear; 20. a main box output shaft fixing bearing; 21. the auxiliary box input shaft is provided with a bearing in a bag; 22. the auxiliary box output shaft is fixed with a bearing; 23. a main box synchronizer; 100. an input shaft assembly.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The speed change device in the invention comprises a speed changer or a speed reducer, and the speed changer comprises but is not limited to a single-section or multi-section double-intermediate shaft speed changer and the like. Such as common single-stage 1-, 2-, 4-, 5-, 6-, 7-gears; a two-stage twelve-speed transmission 6X2, a sixteen-speed transmission 6X3 and the like; a three-stage twelve speed transmission 2X3X2, a sixteen speed transmission 2X4X2, etc.; all other embodiments, which can be derived by a person skilled in the art from the embodiments patented herein without making any creative effort, shall fall within the scope of protection of the present patent.
According to the embodiment of the invention, as shown in fig. 2 to 8, a multi-shaft power splitting load balancing mechanism with a normally meshed gear floating radially and freely is provided, and the load balancing mechanism comprises an input shaft 1, an input shaft fixed bearing 2, a floating connecting sleeve 3 and an input shaft normally meshed gear 4, wherein the input shaft is connected with a shell 5 through the input shaft fixed bearing; the floating connecting sleeve 3 is connected with the input shaft 1; the floating connecting sleeve 3 is connected with the input shaft constant mesh gear 4. See fig. 2. The load balancing mechanism can ensure that the constantly meshed gear of the input shaft can transmit torque and simultaneously ensure that the constantly meshed gear of the input shaft can float freely on an end face perpendicular to the axis of the input shaft.
An input shaft assembly of a double-countershaft transmission in the prior art is shown in fig. 1, an input shaft 1 and an input shaft constant mesh gear 4 are connected through an internal spline and an external spline, and the input shaft constant mesh gear 4 cannot float in the radial direction. The load sharing between the two countershafts is achieved by the radial floating of the respective range gears 19 on the main box output shaft 7.
In the invention, the load balancing mechanism (see fig. 2) comprises an input shaft 1, an input shaft fixed bearing 2, an input shaft constant mesh gear 4 and a floating connecting sleeve 3, wherein the input shaft 1 is connected with a shell 5 through the input shaft fixed bearing 2; the floating connecting sleeve 3 is connected with the input shaft 1; the floating connecting sleeve 3 is connected with the input shaft constant mesh gear 4. The floating connecting sleeve 3 and the input shaft 1 are coupled together by means of crowning teeth, and the floating connecting sleeve 3 and the input shaft constant mesh gear 4 are coupled together by means of crowning teeth. The connection mode of the two ends of the floating connecting sleeve 3 comprises connection by adopting an involute drum spline or a rectangular drum spline. The crowned teeth comprise an inner drum or an outer drum, and the connecting surface of the crowned teeth is a single-section or multi-section circular arc. The crown teeth are involute drums, and other drum teeth can be adopted.
The floating connecting sleeve 3 is adopted, and two ends of the floating connecting sleeve are respectively connected with the input shaft 1 and the input shaft normally meshed gear 4 through crowned teeth, so that the input shaft normally meshed gear 4 can freely float in a plane vertical to the axis of the input shaft 1 while transmitting torque. With the input shaft 1 fixed with bearings, it is ensured that the input shaft constantly meshing gear 4 transmits only torque while remaining free floating in the radial direction.
Besides the structure of the floating connecting sleeve 3, other structures can be adopted (see fig. 3), such as that the input device assembly comprises an input shaft 1, an input shaft fixed bearing 2, an input shaft constant mesh gear 4 and an elastic torsion sheet 6, wherein the input shaft 1 is connected with a shell 5 through the input shaft fixed bearing 2; the elastic torque plate 6 is fixed in the circumferential groove of the input shaft 1, a certain gap is formed between the elastic torque plate 6 and the inner groove of the input shaft constant mesh gear 4, and when the elastic torque plate rotates, torque is transmitted through one side of the inner groove.
An elastic torsion sheet 6 is adopted, one end of the elastic torsion sheet is fixed in a circumferential groove of the input shaft 1, and the other end of the elastic torsion sheet keeps radial and circumferential clearances with an inner groove of the input shaft constant mesh gear 4, so that the input shaft constant mesh gear 4 can freely float in a plane vertical to the axis of the input shaft 1 while transmitting torque. In the case where the input shaft 1 is rotated by the bearing, the elastic torque piece 6 is in contact with the side of the inner groove of the input shaft constant mesh gear 4, transmitting the torque to the input shaft constant mesh gear 4, ensuring that it transmits only the torque while maintaining the free radial floating.
The load balancing mechanism can be applied to a traditional double-intermediate-shaft transmission layout. The double-intermediate-shaft transmission (see fig. 7) adopting the load balancing mechanism comprises an input shaft, a floating connecting piece, an input shaft normally-meshed gear, a first main box intermediate shaft assembly 16, a main box output shaft 7, a gear 19, an auxiliary box intermediate shaft 8, an auxiliary box output shaft 10 and a shell 5, wherein the input shaft 1 is connected and installed on the shell 5 through a bearing 17, one end of the main box output shaft 7 is fixed by a bagged bearing 18 installed in the input shaft 1, and the other end of the main box output shaft is connected with the shell 5 through a main box output shaft fixed bearing 20; one end of the auxiliary box output shaft 10 is fixed in the main box output shaft 7 through an auxiliary box input bagged bearing 21, and the other end is connected with the shell 5 through an auxiliary box output shaft fixed bearing 22. The gear wheel 19 is connected to the main box output shaft 7 via a needle bearing or a plain bearing. Compared with the prior art, the cantilever beam structure is cancelled; the gear wheel 19 on the main box output shaft 7 is connected to the main box output shaft 7 by means of a needle bearing or a slide bearing. Compared with the prior art, the radial floating clearance between the gear 19 and the main box output shaft 7 is eliminated. In the above case, the lifetime requirement of 22 ten thousand times (equivalent to 100 ten thousand kilometers) can be satisfied using the conventional main box synchronizer 23 and the first sub-box synchronizer 9.
Besides the double-intermediate-shaft structure of the auxiliary box, the auxiliary box can also adopt a planetary mechanism structure, the main box has four gears, and the auxiliary box has two gears, and is a typical two-section planetary auxiliary box transmission. As shown in fig. 8, the main box includes an input shaft assembly 100, a second main box countershaft assembly 15, a main box output shaft 7, and a second sub-box synchronizer 12. The auxiliary box comprises an auxiliary box planet carrier 13, an auxiliary box sun gear 11, an auxiliary box gear ring 14 and a shell 5, the input shaft 1 is connected and installed on the shell 5 through a bearing 17, and two ends of a second main box intermediate shaft assembly 15 of the main box are connected with the shell 5 through bearings. One end of the main box output shaft 7 is fixed by a bagged bearing 18 arranged in the input shaft 1, and the other end is connected with the shell 5 by a main box output shaft fixed bearing 20. Compared with the prior art, the cantilever beam structure is cancelled; the gear wheel 19 on the main box output shaft 7 is connected to the main box output shaft 7 by means of a needle bearing or a slide bearing. Compared with the prior art, the radial floating clearance between the gear 19 and the main box output shaft 7 is eliminated. In the above case, the lifetime requirement of 22 ten thousand times (equivalent to 100 ten thousand kilometers) can be satisfied using the conventional main box synchronizer 23 and the second sub-box synchronizer 12.
By adopting the radial suspension mechanism shown in the patent figure 2, namely, the input shaft 1 and the input shaft constant mesh gear 4 are connected in a crowned tooth connection mode at two ends of the floating connecting sleeve 3, so that the radial floating of the input shaft constant mesh gear 4 can be realized to ensure the uniform loading of two main box intermediate shaft assemblies.
By adopting the radial suspension mechanism shown in the patent figure 3, namely, the radial suspension mechanism is connected with the input shaft 1 and the input shaft constant mesh gear 4 in a connection mode of the elastic torsion sheet 6, so that the radial floating of the input shaft constant mesh gear 4 can be realized to ensure the uniform loading of the two main box intermediate shaft assemblies.
Compared with the prior art, the cantilever beam structure is cancelled; the gear wheel 19 on the output shaft 7 of the main box is connected to the output shaft by means of a needle bearing or a slide bearing. Compared with the prior art, the radial floating clearance between the gear and the output shaft is eliminated. In the above case, the lifetime requirement of 22 ten thousand times (equivalent to 100 ten thousand kilometers) can be satisfied using the conventional main box synchronizer 23 and the second sub-box synchronizer 12.
The invention can achieve the effect of uniform load and shunt by the radial floating of the input shaft constantly engaged gear 4. The input shaft constantly meshing gear 4 ensures that it floats freely on an end face perpendicular to the axis of the input shaft 1 while transmitting torque. The invention is applied to the existing double-intermediate-shaft transmission, can cancel the radial floating of the output shaft and the radial floating of gears of all gears, and ensures that the traditional synchronizer can reach the service life required by users while the intermediate shafts are loaded uniformly.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (6)

1. The multi-shaft power splitting load balancing mechanism with the normally meshed gear capable of floating radially is characterized by comprising an input shaft (1), an input shaft fixing bearing (2), an intermediate connecting piece and an input shaft normally meshed gear (4), wherein the input shaft normally meshed gear (4) can transmit torque and ensure that the input shaft normally meshed gear floats freely on an end face perpendicular to the axis of the input shaft.
2. The multi-shaft power-split load-sharing mechanism with the radially free floating constant-mesh gear according to claim 1, wherein the intermediate connector comprises a floating connecting sleeve (3), and the input shaft (1) is connected with a housing (5) through the input shaft fixed bearing (2); the floating connecting sleeve (3) is connected with the input shaft (1); the floating connecting sleeve (3) is connected with the input shaft constant mesh gear (4).
3. The multi-shaft power-split load-sharing mechanism with the normally meshed gears free floating in the radial direction is characterized in that the intermediate connecting piece comprises an elastic torsion piece (6), and the input shaft (1) is connected with a shell (5) through the input shaft fixed bearing (2); the elastic torque sheet (6) is fixed in a circumferential groove of the input shaft (1), a certain gap is formed between the elastic torque sheet (6) and an inner groove of the input shaft constant mesh gear (4), and when the elastic torque sheet rotates, torque is transmitted through one side of the inner groove.
4. A constant-meshed-gear radial free-floating multi-shaft power-split load-sharing mechanism according to claim 2, wherein the floating connecting sleeve (3) and the input shaft (1) are coupled together by crowning teeth, and the floating connecting sleeve (3) and the input-shaft constant-meshed gear (4) are coupled together by crowning teeth.
5. The multi-shaft power splitting and load sharing mechanism with the normally meshed gears radially and freely floating is characterized in that the two ends of the floating connecting sleeve (3) are connected in an involute crowned spline or rectangular crowned spline mode.
6. The multi-shaft power-splitting load-sharing mechanism with radially free floating normally meshed gears as claimed in claim 4, wherein the crowned teeth comprise an inner drum or an outer drum, and the connecting surface is a single-segment or multi-segment circular arc.
CN202110426287.4A 2021-04-20 2021-04-20 Multi-shaft power split load balancing mechanism with normally meshed gears floating radially and freely Pending CN113124134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110426287.4A CN113124134A (en) 2021-04-20 2021-04-20 Multi-shaft power split load balancing mechanism with normally meshed gears floating radially and freely

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110426287.4A CN113124134A (en) 2021-04-20 2021-04-20 Multi-shaft power split load balancing mechanism with normally meshed gears floating radially and freely

Publications (1)

Publication Number Publication Date
CN113124134A true CN113124134A (en) 2021-07-16

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Family Applications (1)

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CN202110426287.4A Pending CN113124134A (en) 2021-04-20 2021-04-20 Multi-shaft power split load balancing mechanism with normally meshed gears floating radially and freely

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