CN112145633A - Gear shifting mechanism and speed reducer for Bahassai vehicle - Google Patents
Gear shifting mechanism and speed reducer for Bahassai vehicle Download PDFInfo
- Publication number
- CN112145633A CN112145633A CN202011158793.1A CN202011158793A CN112145633A CN 112145633 A CN112145633 A CN 112145633A CN 202011158793 A CN202011158793 A CN 202011158793A CN 112145633 A CN112145633 A CN 112145633A
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- Prior art keywords
- gear
- vehicle
- bahasa
- sleeve
- shaft
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
- F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
- F16H3/087—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears
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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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
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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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/32—Gear shift yokes, e.g. shift forks
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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
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
- F16H2200/0034—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising two forward speeds
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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
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/203—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes
- F16H2200/2033—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes with one engaging means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
The invention relates to the technical field of vehicles, in particular to a gear shift mechanism and a speed reducer for a Bahassa vehicle, wherein the gear shift mechanism for the Bahassa vehicle comprises an intermediate shaft and an input end, gear gears are arranged at two ends of the intermediate shaft, a switching part is arranged between the gear gears, the switching part comprises a shifting fork and an engaging sleeve arranged on the intermediate shaft, the shifting fork controls the engaging sleeve to approach and combine to one gear so as to connect one gear with the input end, or controls the engaging sleeve to approach and combine to the other gear so as to connect the other gear with the input end. The transmission ratio-variable power output device has the advantages of realizing variable transmission ratio power output, being simple in structure, safe and reliable, being suitable for the transmission case of the Baha racing car, being capable of better adapting to complex road conditions in a competition, and enabling the transmission case to have higher safety, stability and operability in actual competition application.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a gear shifting mechanism and a speed reducer for a Bahassa vehicle.
Background
The Chinese society of automotive engineering, Baja SAE China (BSC for short) is a race designed, manufactured and detected by automobiles in colleges and universities, vocational colleges and related professionals in the field of school teams.
In Baha competition of the Chinese society of automotive engineering, the gear-changeable racing car can better adapt to the competition environment, and the climbing test, the control test and the endurance test in the dynamic project are all carried out on the non-paved road surface. Especially up to 4 hours, the track conditions are still more harsh. Since the vehicles for racing use the established engines in a unified manner, it is difficult to adapt to various complex road surfaces with a single transmission than a racing car under such conditions.
The traditional speed reducer is applied to the Baha racing car, the performance of the traditional speed reducer cannot be guaranteed, the reliability is poor, and the situation of power surplus or power shortage easily occurs in the racing car under the road condition with large difference.
Disclosure of Invention
The invention aims to solve the problems in the background art by modifying the traditional speed reducer part of the Baha racing car, adding a gear shifting mechanism in a gearbox, modifying the speed reducer with a single transmission ratio into a two-gear speed reducer, and optimizing and improving the practicability and reliability of the speed reducer.
In order to achieve the purpose, the invention provides the following technical scheme:
a gear shifting mechanism for a Bahasai vehicle comprises a middle shaft and an input end, wherein gear gears are arranged at two ends of the middle shaft, a switching component is arranged between the gear gears, the switching component comprises a shifting fork and an engaging sleeve arranged on the middle shaft, the shifting fork controls the engaging sleeve to approach and combine to one gear so as to enable the one gear to be connected with the input end, or controls the engaging sleeve to approach and combine to the other gear so as to enable the other gear to be connected with the input end.
As a further scheme of the invention: the input end comprises an input shaft and two input gears coaxially mounted on the input shaft, and the input gears and the gear gears correspondingly form transmission structures with different transmission ratios.
As a further scheme of the invention: the gear shifting mechanism for the Bahasse vehicle has three states, wherein the engaging sleeve is in a high-speed gear when combined with a high-speed gear, the engaging sleeve is in a neutral gear when not combined with two gears, and the engaging sleeve is in a low-speed gear when combined with a low-speed gear.
As a still further scheme of the invention: the joint sleeve is provided with a groove, and the shifting fork is connected with the joint sleeve through an embedded groove.
As a still further scheme of the invention: a spline hub is arranged in the joint sleeve and is matched with a spline arranged on the intermediate shaft.
As a still further scheme of the invention: and the joint sleeve is provided with an oil hole for enabling lubricating oil to enter the spline hub.
As a still further scheme of the invention: the tail end of the shifting fork is provided with a shifting fork shaft, the shifting fork shaft is provided with a plurality of grooves, and the plurality of grooves are matched with the outside to position the shifting fork and the combination sleeve when the shifting fork is used for shifting.
As a still further scheme of the invention: and an L-shaped pull rod is arranged on the shifting fork shaft and controls the shifting fork to move.
As a still further scheme of the invention: the gear is provided with a hollow part, and the joint sleeve is combined with the hollow part of the gear through bosses arranged on the surfaces of the two sides of the joint sleeve.
As a still further scheme of the invention: ribbed plates are arranged on two sides of the gear according to set parameters, and the set parameters are obtained by simulation analysis of stress conditions of the gear.
As a still further scheme of the invention: the joint sleeve is provided with an oil hole which can enable lubricating oil to enter the spline for lubricating and cooling.
The invention provides another technical scheme that: a speed reducer comprises a shell, a transmission assembly and a gear shifting mechanism for a Bahassa vehicle, wherein the transmission assembly is arranged on the shell and matched with the gear shifting mechanism for the Bahassa vehicle.
Compared with the prior art, the invention has the beneficial effects that: the variable transmission ratio power output ensures the performance and reliability of the Baha racing car using the gear shifting mechanism for the Baha racing car and has stable structure.
Drawings
Fig. 1 is an overall configuration diagram of a shift mechanism for a bahasa vehicle in an embodiment of the present invention.
FIG. 2 is a disassembled schematic view of a shifting mechanism for a Bahasel vehicle according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a shift position switching portion according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of the intermediate shaft in the embodiment of the invention.
Fig. 5 is a schematic structural diagram of a high-speed gear in the embodiment of the invention.
Fig. 6 is a schematic structural diagram of a low-speed gear in the embodiment of the invention.
In the drawings: 1. the shifting fork shaft, 2, a shifting fork, 3, a combination sleeve, 4, a high-speed gear, 5, a low-speed gear, 6, an intermediate shaft, 7, an input shaft, 8, an L-shaped pull rod, 9, a square hole, 10, a groove, 11, a spline hub, 12, a boss, 13, an oil hole, 14, a groove, 15, a rib plate, 16 and a spline.
Detailed Description
Reference will now be made in detail to exemplary implementations, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Referring to fig. 1-2, in one embodiment of the present invention, a gear shift mechanism for a bahasa vehicle includes an intermediate shaft 6 and an input end, the intermediate shaft is provided with gear gears at both ends, a switching member is installed between the gear gears, the switching member includes a shift fork 2 and an engaging sleeve 3 installed on the intermediate shaft, the shift fork 2 controls the engaging sleeve 3 to approach and combine to one gear so as to connect the one gear with the input end, or controls the engaging sleeve 3 to approach and combine to another gear so as to connect the other gear with the input end.
Specifically, the input end comprises an input shaft 7 and two input gears coaxially mounted on the input shaft 7, the input gears and the gear gears correspondingly form transmission structures with different transmission ratios, and the gear gears are respectively set as a high-speed gear 4 and a low-speed gear 5. When the automatic transmission device works, a driver indirectly shifts a fork 2, the fork 2 shifts a joint sleeve 3 to control the joint sleeve 3 to move along the direction of a high-speed gear 4, a gear shifting mechanism is in a high-speed gear when the joint sleeve 3 is combined with the high-speed gear 4, the gear shifting mechanism is in a neutral gear when the joint sleeve 3 is not combined with two gears, and the gear shifting mechanism is in a low-speed gear when the joint sleeve 3 is combined with a low-speed gear 5.
As described above, the gear shift mechanism for a bahasa vehicle has three states, the engaging sleeve 3 is in a high-speed gear when combined with the high-speed gear 4, the engaging sleeve 3 is in a neutral gear when not combined with two gears, the engaging sleeve 3 is in a low-speed gear when combined with the low-speed gear 5, and power output with a variable transmission ratio ensures performance and reliability of a bahasa racing vehicle using the gear shift mechanism for a bahasa vehicle, and has a stable structure.
Referring to fig. 3, in another embodiment of the present invention, a groove 14 is formed on the coupling sleeve, and the shift fork 2 is connected to the coupling sleeve 3 through the insertion groove 14; a spline hub 11 is arranged in the joint sleeve, and the spline hub 11 is matched with a spline 16 arranged on the intermediate shaft; the joint sleeve 3 is provided with oil holes 13 for allowing lubricating oil to enter the spline hub 11.
The shifting fork 2 drives the engaging sleeve 3 to move through the transmission force of the groove 14, and the engaging sleeve 3 moves on the spline 13 to different positions to control the gear shifting mechanism to be in different gears. The oil hole 13 can make lubricating oil enter the spline and the spline hub to lubricate and cool all parts.
Referring to fig. 1-3, in another embodiment of the present invention, a fork shaft 1 is installed at a tail end of the fork, a plurality of grooves 10 are formed on the fork shaft 1, and the grooves 10 are matched with the outside to position the fork 2 and the coupling sleeve 3 during shifting; an L-shaped pull rod 8 is mounted on the shifting fork shaft 1, and the L-shaped pull rod 8 controls the shifting fork 2 to move.
Specifically, a square hole 9 is formed in the shifting fork shaft, the L-shaped pull rod 8 is connected with the square hole 9, force is transmitted to the shifting fork shaft 1 through the L-shaped pull rod 8 to drive the shifting fork 2, and the shifting fork 2 shifts the joint sleeve 3 to control gear shifting; the tail end of the shifting fork shaft 1 is provided with three grooves 10 matched with a shifter bolt on the outer side of the shell, and the shifting fork shaft is used for positioning the shifting fork 2 and the combining sleeve 3 during gear shifting. The shift fork 2, the combination cover 3, jackshaft 6, L type pull rod are 40Cr milling process and form, high-speed gear, low-speed gear are 40Cr milling process and form, the shift fork axle, L type pull rod pass through bolted connection, the combination cover, high-speed gear, low-speed gear are connected through the jackshaft. Simple structure, the gearshift for the car of bahasa after the equipment stability is high.
Referring to fig. 3, 5 and 6, in another embodiment of the present invention, the gear is provided with a hollow portion, and the engaging sleeve is combined with the hollow portion of the gear through bosses 12 disposed on two side surfaces of the engaging sleeve.
Specifically, rib plates 15 are arranged on two sides of the gear according to set parameters to form a hollow part, and the set parameters are obtained through simulation analysis of stress conditions of the gear. The ribbed plates are used for matching with the boss 12 on the combination sleeve to complete gear change.
Referring to fig. 1-3, according to another embodiment of the present invention, a speed reducer includes a housing, a transmission assembly, and a shift mechanism for a bahasa vehicle as described above, wherein the transmission assembly is mounted on the housing to cooperate with the shift mechanism for the bahasa vehicle.
Specifically, the transmission assembly comprises an output gear and an output shaft, the output shaft is arranged in the shell, and the output gear is arranged on the output shaft and is in meshed connection with a gear correspondingly arranged on a gear shifting mechanism for the Bahasse car. The gear shifting mechanism for the Bahasa vehicle comprises a middle shaft 6 and an input end, gear gears are arranged at two ends of the middle shaft, a switching component is arranged between the gear gears and comprises a shifting fork 2 and an engaging sleeve 3 arranged on the middle shaft, the shifting fork 2 controls the engaging sleeve 3 to approach and combine to one gear so as to enable the one gear to be connected with the input end, or controls the engaging sleeve 3 to approach and combine to the other gear so as to enable the other gear to be connected with the input end. The input end comprises an input shaft 7 and two input gears coaxially mounted on the input shaft 7, the input gears and the gear gears correspondingly form transmission structures with different transmission ratios, and the gear gears are respectively set as a high-speed gear 4 and a low-speed gear 5. When the automatic transmission device works, a driver indirectly shifts a fork 2, the fork 2 shifts a joint sleeve 3 to control the joint sleeve 3 to move along the direction of a high-speed gear 4, a gear shifting mechanism is in a high-speed gear when the joint sleeve 3 is combined with the high-speed gear 4, the gear shifting mechanism is in a neutral gear when the joint sleeve 3 is not combined with two gears, and the gear shifting mechanism is in a low-speed gear when the joint sleeve 3 is combined with a low-speed gear 5. The Baha racing car using the gear shifting mechanism for the Baha racing car has high performance and reliability and stable structure.
The working principle of the invention is as follows: processing has big pinion on the input shaft, be provided with the spline on the jackshaft, high-speed gear and low-speed gear are connected through cylinder bearing respectively at the spline both ends, the two all can be at epaxial free rotation not with jackshaft connection, a cooperation clutch collar on the spline, clutch collar inside processing has the spline hub can with spline fit, the clutch collar is gone up flutedly and can be connected with the external connection, be equipped with the slot and be connected with the shift fork, the shift fork is fixed on the declutch shift shaft, the declutch shift shaft end has an L type pull rod to pass through the quad slit connection at the declutch shift shaft end. When the gear shifting mechanism works, a driver indirectly pulls the L-shaped pull rod to further pull the shifting fork shaft and the shifting fork, the shifting fork pulls the joint sleeve to control the joint sleeve to move along the spline direction, the gear shifting mechanism is in a high gear when the joint sleeve is combined with the high-speed gear, the gear shifting mechanism is in a neutral gear when the joint sleeve is not combined with the two gears, and the gear shifting mechanism is in a low gear when the joint sleeve is combined with the low-speed gear.
It should be noted that the manufacturing processes adopted by the present invention are all prior art applications, and those skilled in the art can implement the intended functions according to the related descriptions, or implement the technical features required to be accomplished by similar techniques, and will not be described in detail herein.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. A gear shifting mechanism for a Bahasai vehicle is characterized by comprising an intermediate shaft and an input end, wherein gear gears are arranged at two ends of the intermediate shaft, a switching component is arranged between the gear gears, the switching component comprises a shifting fork and an engaging sleeve arranged on the intermediate shaft, and the shifting fork controls the engaging sleeve to approach and combine to one gear so as to enable the one gear to be connected with the input end, or controls the engaging sleeve to approach and combine to the other gear so as to enable the other gear to be connected with the input end.
2. The gearshift mechanism for a bahasa vehicle of claim 1, wherein the input end comprises an input shaft and two input gears coaxially mounted on the input shaft, and the input gears and the gear gears correspondingly form transmission structures with different transmission ratios.
3. The gearshift mechanism for a bahasa vehicle of claim 1, wherein the engagement sleeve is provided with a groove, and the shift fork is connected with the engagement sleeve through an embedded groove.
4. The gearshift mechanism for a bahasa vehicle of claim 1, wherein a splined hub is provided in the clutch collar, the splined hub engaging with a spline provided on the countershaft.
5. The gearshift mechanism for a bahasa vehicle of claim 4, wherein the coupling sleeve is provided with oil holes for allowing lubricating oil to enter the splined hub.
6. The gearshift mechanism for a bahasa vehicle as claimed in claim 1, wherein a shift fork shaft is mounted at the tail end of the shift fork, a plurality of grooves are arranged on the shift fork shaft, and the grooves are matched with the outside to position the shift fork and the combination sleeve during shifting.
7. The gearshift mechanism for a bahasa vehicle of claim 6, wherein an L-shaped pull rod is mounted on the shift fork shaft, and the L-shaped pull rod controls the shifting fork.
8. The gearshift mechanism for a bahasa vehicle of claim 1, wherein the gear position gear is provided with a hollowed-out portion, and the engaging sleeve is combined with the hollowed-out portion of the gear position gear through bosses arranged on both side surfaces of the engaging sleeve.
9. The gearshift mechanism for a bahasa vehicle of claim 1, wherein ribs are arranged on two sides of the gear according to set parameters, and the set parameters are obtained by simulation analysis of stress conditions of the gear.
10. A retarder comprising a gear change mechanism for a bahassa vehicle as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011158793.1A CN112145633A (en) | 2020-10-26 | 2020-10-26 | Gear shifting mechanism and speed reducer for Bahassai vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011158793.1A CN112145633A (en) | 2020-10-26 | 2020-10-26 | Gear shifting mechanism and speed reducer for Bahassai vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112145633A true CN112145633A (en) | 2020-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011158793.1A Pending CN112145633A (en) | 2020-10-26 | 2020-10-26 | Gear shifting mechanism and speed reducer for Bahassai vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112145633A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198465A (en) * | 2021-12-16 | 2022-03-18 | 厦门市集美职业技术学校 | Speed reducer of Baha racing car |
| CN114294251A (en) * | 2021-12-14 | 2022-04-08 | 宁波方太厨具有限公司 | Fan system and range hood with same |
-
2020
- 2020-10-26 CN CN202011158793.1A patent/CN112145633A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294251A (en) * | 2021-12-14 | 2022-04-08 | 宁波方太厨具有限公司 | Fan system and range hood with same |
| CN114198465A (en) * | 2021-12-16 | 2022-03-18 | 厦门市集美职业技术学校 | Speed reducer of Baha racing car |
| CN114198465B (en) * | 2021-12-16 | 2024-03-15 | 厦门市集美职业技术学校 | Speed reducer of baha racing car |
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