CN109838513B - Automatic gear shifting driving system for vehicle - Google Patents
Automatic gear shifting driving system for vehicle Download PDFInfo
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- CN109838513B CN109838513B CN201811590595.5A CN201811590595A CN109838513B CN 109838513 B CN109838513 B CN 109838513B CN 201811590595 A CN201811590595 A CN 201811590595A CN 109838513 B CN109838513 B CN 109838513B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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Abstract
The invention discloses an automatic gear shifting driving system of a vehicle, which comprises a gear shifting mechanism, a rear axle gearbox and a controller. The gear lever assembly comprises a motor, a worm and gear mechanism, a gear shifting shaft and a gear shifting column, and comprises a fixed gear shifting shaft, a first shifting fork assembly and a second shifting fork assembly which are sleeved on the gear shifting shaft; the first shifting fork assembly comprises a first seat plate, a fork handle, two cylindrical springs and two clamping sleeves, wherein the fork handle is used for shifting a first shifting fork of a first sliding gear connection transmission, the shifting gear assembly comprises a plurality of transmission shaft assemblies, the transmission shafts of the two transmission shaft assemblies are respectively provided with a first sliding gear and a second sliding gear, one ends of the two sliding gears are coaxially connected with a movable sleeve, the two sliding gears and the movable sleeve are rotatably sleeved on the transmission shafts where the two sliding gears and the movable sleeve are located, and the controller shifts gears through motor driving. The automatic gear shifting driving system of the vehicle has accurate and timely gear shifting response and better reliability.
Description
Technical Field
The invention belongs to the technical field of vehicle gear shifting, and particularly relates to a variable speed transmission mechanism on a vehicle chassis.
Background
The existing vehicle gear shifting mechanism is complex in structure, unreasonable in overall structure arrangement, easy to lag or inaccurate and reliable in gear shifting, in addition, the existing vehicle speed changing transmission design is that a gearbox is connected to a rear axle through a long transmission chain in an indirect transmission mode, the transmission chain is overlong, the failure rate is high, and transmission vibration is large. To the improvement of each part of the gear shifting structure of the existing vehicle, a person skilled in the art is required to design a novel automatic gear shifting driving system of the vehicle so as to improve the high-efficiency reliability of the transmission of the vehicle.
Disclosure of Invention
The invention aims to solve the technical problems and provide the vehicle automatic gear shifting driving system which has accurate and timely gear shifting response, small vibration and better reliability.
The technical scheme of the invention is as follows:
an automatic gear shifting driving system of a vehicle comprises a gear shifting mechanism, a rear axle gearbox and a controller; the gear shifting mechanism comprises a gear shifting lever assembly, a deflector rod assembly and a gear shifting assembly; the gear shifting lever assembly comprises a motor, a worm gear mechanism, a gear shifting shaft and a gear shifting column, wherein an output shaft of the motor is connected with a worm, a worm wheel is fixed on the gear shifting shaft to drive the gear shifting shaft to rotate, the gear shifting column is cylindrical and fixed on the gear shifting shaft, and a circle of gear shifting grooves are formed in the cylindrical surface of the gear shifting column along the circumferential direction of the cylindrical surface of the gear shifting column; a flat plate and a baffle plate which are opposite to each other are sleeved on a gear shifting shaft between a gear shifting column and a worm gear by the worm gear, the gear shifting shaft can freely rotate after passing through the flat plate, a pair of magnetic sensors are arranged on the end face of the flat plate, the baffle plate is fixed on the gear shifting shaft, a plurality of pairs of mounting holes are arranged on the end face of the baffle plate, when the worm gear drives the gear shifting shaft to synchronously rotate together, each pair of mounting holes sequentially pass through the positions opposite to the pair of magnetic sensors, at most one magnetic steel is embedded in at least one pair of mounting holes so that the pair of mounting holes are neutral sensing positions, and each of the other pairs of mounting holes is embedded with one magnetic steel so that the pair of mounting holes are non-neutral sensing positions;
the gear shifting assembly comprises a plurality of transmission shaft assemblies, wherein the transmission shafts of the two transmission shaft assemblies are respectively provided with a first sliding gear and a second sliding gear, one ends of the two sliding gears are coaxially connected with a movable sleeve, the two sliding gears and the movable sleeve are rotatably sleeved on the transmission shafts where the two sliding gears and the movable sleeve are respectively positioned, the outer cylindrical surface of the movable sleeve is axially provided with an external spline structure, the transmission shaft is fixedly sleeved with a fixed sleeve at a position close to the sliding cylinder, the fixed sleeve is provided with an external spline, and the outer part of the fixed sleeve is also sleeved with an internal spline sleeve matched with the external spline; the shifting lever assembly comprises a shifting lever shaft fixedly arranged, a first shifting fork assembly and a second shifting fork assembly which are sleeved on the shifting lever shaft and can axially slide along the shifting lever shaft, the shifting fork assembly comprises a shifting fork head extending towards the upper part and a sliding column extending towards the lower part, the shifting fork head is used for shifting a corresponding sliding gear to connect and drive, and the free end at the bottom of the sliding column is positioned in a shifting groove and axially moves towards the shifting lever under the guiding action of the shifting groove when the shifting column rotates, so that the shifting fork head is clamped outside an inner spline sleeve and can drive the inner spline sleeve to axially slide to a position matched with the movable sleeve and the fixed sleeve;
the gear shifting lever assembly, the deflector rod assembly and the gear shifting assembly are all arranged in a single machine shell, an output shaft in the transmission shaft assembly is directly meshed with an input gear in a rear axle gear box, and the controller is in signal communication with the magnetic sensor and drives the gear shifting shaft to rotate through a motor to realize automatic gear shifting.
Further, the shift groove on one shift post is provided with two turning groove parts which are respectively bent and arched towards the two ends of the axis of the shift post, and the shift groove of the other shift post is provided with one turning groove part which is arched towards the outer part of the shift post.
Further, the neutral sensing position is located between two pairs of mounting holes as 2 nd gear and 3 rd gear, and the remaining pair of mounting holes is used as a 1 st gear.
Further, the part of the motor output shaft extending out of the motor shell end face is fixed with two cylindrical gears with different sizes, the smaller cylindrical gears are arranged by the motor shell end face, the motor shell end face is further provided with a mandrel parallel to the output shaft, and two gears which can be meshed with the two cylindrical gears on the output shaft are arranged on the mandrel.
Further, the fork head is a semicircular arc slat.
Further, the part of the sliding connecting plate clamped in the annular groove is of a semicircular arc slat structure, the part buckled on the bottom plate of the first seat plate is of a n-shaped structure, two sides of the middle part of the bottom plate of the first seat plate outwards extend to form limiting protruding parts, and the protruding parts separate and isolate the two sliding connecting plates.
Further, the end parts of the transmission shafts where the two sliding gears are located are respectively provided with a rotation speed sensor used for detecting the rotation speed of the transmission shafts, and after signals acquired by the rotation speed sensors are transmitted to the controller, the controller drives the motor to rotate.
Further, the first shifting fork assembly comprises a first seat board in a' shape, a fork handle, two cylindrical springs and two clamping sleeves, wherein the fork handle is positioned in an opening of the first seat board and is used for shifting a first shifting fork of a first sliding gear for connecting and driving, the opening of the first seat board is upward, a shifting rod shaft vertically penetrates through two side plates of the opening of the first seat board, the fork handle of the first shifting fork can be axially sleeved on the shifting fork shaft, a first guide column at the bottom of the fork handle extends into a strip hole in the inner bottom of the opening of the first seat board, the first guide column can slide in the strip hole along the direction parallel to the shifting rod shaft, the fork handle is in a sleeve shape, the two ends of the fork handle are respectively tightly attached with the clamping sleeves which are sleeved on the shifting rod shaft and can axially slide along the shifting rod shaft, one end of each clamping sleeve is clamped in the annular groove, the other end of each sliding connecting plate is buckled on a bottom plate of the first seat board and can axially slide along the shifting rod shaft, the two cylindrical springs are respectively sleeved on the shifting rod shaft in the first direction, and the clamping sleeves are compressed between the corresponding side plates and the corresponding side plates;
the second shifting fork assembly comprises a second seat plate in a shape of a' [, a fork handle and a cylindrical compression spring, wherein the fork handle and the cylindrical compression spring are both positioned in an opening of the second seat plate and are used for stirring a second shifting fork for connecting and driving a second sliding gear, a strip-shaped hole is formed in the inner bottom of the opening of the second seat plate, a second guide column is arranged at the bottom of the fork handle of the second shifting fork, the second guide column stretches into the strip-shaped hole and can slide in the strip-shaped hole along a direction parallel to a shifting rod shaft, a circular concave cavity is formed in one end of the second shifting fork handle close to the first shifting fork assembly along the axial direction of the second shifting fork handle, one end of the compression spring in a extrusion state stretches into the concave cavity, and the other end of the compression spring is tightly connected with the inner wall of a side plate at the opening of the second seat plate; and sliding columns are fixed on outsoles at the opening parts of the ends, close to the first seat board and the second seat board, of the outsoles, are positioned in the gear shifting grooves and drive corresponding shifting forks to shift corresponding sliding gears to realize gear shifting when the gear shifting columns rotate.
Further, the fork head is a semicircular arc slat.
Further, the part of the sliding connecting plate clamped in the annular groove is of a semicircular arc slat structure, the part buckled on the bottom plate of the first seat plate is of a n-shaped structure, two sides of the middle part of the bottom plate of the first seat plate outwards extend to form limiting protruding parts, and the protruding parts separate and isolate the two sliding connecting plates.
The invention has the beneficial effects that: the invention adopts the gear shift lever assembly, the deflector rod assembly and the gear shift assembly to realize timely and accurate gear shift of a vehicle, when in gear shift, the motor of the gear shift lever assembly rotates, the gear shift shaft is driven to rotate through the turbine worm mechanism, so that the gear shift column rotates, the gear shift groove on the gear shift column matched with the sliding column at the bottom of the deflector rod assembly drives the whole deflector rod assembly to axially move along the deflector rod shaft, namely, the shifting fork on the deflector rod assembly drives the internal spline housing to axially move to a position which simultaneously connects the fixed housing and the movable housing on one transmission shaft of the gear shift assembly, the transmission connection of corresponding sliding gears is realized, and the purpose of gear shift and speed change is achieved. The gear shifting design makes the whole structure simplified as much as possible on the basis of stability and reliability, and reduces the transmission failure rate. For the position judging structure of magnetic induction between the baffle plate and the flat plate of the gear shifting lever assembly, the rotation position of the gear shifting column corresponds to the magnetic sensor and the magnetic steel, when the magnetic steel signal detected by the magnetic sensor is one, namely the gear shifting column rotates to a neutral position, the sliding column of the gear shifting lever assembly is also just positioned at the initial position where the gear shifting lever shaft does not slide towards any end, namely the position where the shifting fork is reset to stay on the inner spline housing and the movable sleeve on the sliding gear in a separated mode. When a baffle plate on a gear shifting shaft rotates to a plurality of pairs of mounting hole positions which are sequentially arranged in the rotation direction, sequential signal correspondence is as follows: the positions of a pair of mounting holes which do not have two magnetic steel signals at the original positions are neutral positions, and a plurality of pairs of mounting holes which are backward correspondingly have two magnetic steel signals, so that the logarithm of the magnetic steel signals detected backward from the sensor to detect the unpaired magnetic steel signals is the corresponding rotation stop position of the gear shifting column with the corresponding gear position, and the gear shifting is simply, directly and accurately realized. The sliding gear is connected with a fixed sleeve fixed on a transmission shaft where the sliding gear is positioned through an internal spline sleeve, so that the fixed connection of the sliding gear and the transmission shaft is realized, the transmission connection of the sliding gear is realized, the structure is simple and reliable, the sliding connection of the fixed sleeve and the movable sleeve is more reliable due to the adoption of a spline type sliding connection structure, the guiding is more accurate, the sliding gear can rotate and skid on the transmission shaft when the sliding gear is not connected with the internal spline sleeve, the transmission shifting effect is realized after the sliding gear is connected, and the transmission conversion is flexible and reliable;
meanwhile, the transmission speed change mechanism formed by the gear lever assembly, the deflector rod assembly and the gear shifting assembly is simple and compact in structure, is very suitable for being directly connected with a rear axle gearbox in a transmission way, does not need to be arranged at a clear position far away from a rear axle like the traditional transmission speed change, and therefore a large section of intermediate transmission chain is directly removed, and the transmission efficiency is more stable in structure on the premise of keeping high efficiency. Therefore, the automatic gear shifting driving system of the vehicle is simple and compact in structure, accurate and timely in gear shifting response, small in vibration and good in reliability.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a schematic structural view of the gear shifting mechanism of the present invention.
FIG. 3 is a partial schematic view of the present invention at the end of a baffle.
FIG. 4 is a schematic view of the mounting positions of the flat plate and the baffle.
FIG. 5 is a schematic structural view of a lever assembly.
FIG. 6 is a partially disassembled schematic illustration of a lever assembly.
Fig. 7 is a schematic diagram of the separation structure of the internal spline housing from the movable and stationary housings.
Description of element numbers: the gear shifting device comprises a motor 1, a worm 2, a cylindrical gear 3, a worm wheel 4, a baffle 5, a magnetic sensor 6, a flat plate 7, a gear shifting shaft 8, a gear shifting column 9, a gear shifting groove 901, a shift lever shaft 10, a first seat plate 11, a cylindrical spring 12, a sliding connecting plate 13, a fork handle 14 of a first shifting fork, a second seat 15, a fork handle 16 of a second shifting fork, a second seat plate 17, a compression spring 18, a fork head 19 of the first shifting fork, a fork head 20 of the second shifting fork, an inner spline housing 21, a fixed housing 22, a movable housing 23, a first sliding gear 24, a second sliding gear 25, a sliding column 26, a clamping housing 27, a mandrel 28, a mounting hole 501, a protruding part 29, a first guide column 30, a second guide column 31, a gear shifting mechanism 100, a rear axle gearbox 200 and a controller 300.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1, a vehicle automatic shift drive system includes a shift mechanism 100, a rear axle gearbox 200, and a controller 300; the gear shifting mechanism 100 includes a gear shift lever assembly, a deflector rod assembly, and a gear shifting assembly, as shown in fig. 2. As shown in fig. 3-4, the gear shift lever assembly comprises a motor 1, a worm wheel 4 worm 2 mechanism, a gear shift shaft 8 and a gear shift column 9, wherein an output shaft of the motor 1 is connected with the worm 2, the worm wheel 4 is fixed on the gear shift shaft 8 to drive the gear shift shaft 8 to rotate, the gear shift column 9 is cylindrical and fixed on the gear shift shaft 8, a circle of gear shift groove 901 is formed in the cylindrical surface of the gear shift column 9 along the circumferential direction of the cylindrical surface, and the cross section of the gear shift groove 901 is rectangular. The gear shifting column 9 and the worm wheel 4 are sleeved with a flat plate 7 and a baffle plate 5 which are opposite to each other, the gear shifting column 8 passes through the flat plate 7 and can rotate freely, a pair of magnetic sensors 6 are arranged on the end face of the flat plate 7 towards the baffle plate 5, the baffle plate 5 is fixed on the gear shifting column 8, a plurality of pairs of mounting holes 501 are arranged on the end face of the baffle plate 5, when the worm wheel 4 drives the gear shifting column 8 to rotate synchronously, each pair of mounting holes 501 sequentially pass through the positions opposite to the pair of magnetic sensors 6, so that the magnetic sensors 6 can detect magnetic steel signals in the mounting holes 501 during rotation. At most one magnetic steel is embedded in at least one pair of mounting holes 501 to enable the pair of mounting holes 501 to be neutral sensing positions, one magnetic steel is embedded in each of the other pairs of mounting holes 501 to enable the pair of mounting holes 501 to be non-neutral sensing positions, so that a controller judges whether a gear shifting position is neutral or not through whether magnetic steel signals acquired by a magnetic sensor 6 are two or not, and according to the judgment standard that the number of the magnetic steel signals which are detected to be in pairs from the detected magnetic steel signals which are not in pairs is a gear position, the mode of judging the response gear position can be various based on the principle of the number of the magnetic steel signals, for example, the magnetic steel signals which are detected to be in pairs are neutral, then the detected first pair of magnetic steel signals is 1 gear, the second pair of magnetic steel signals is 2 gear, and so on; of course, other marking modes are also possible, such as that every two pairs of magnetic steel signals are changed in increasing/decreasing of a gear. In a specific implementation, the neutral position sensing position is located between two pairs of mounting holes 501 serving as 2 gear and 3 gear, the remaining pair of mounting holes 501 are used as 1 gear, namely, two pairs of magnetic steel signals of two adjacent pairs of mounting holes 501 in the neutral position are respectively 2 gear and 3 gear, and the 1 gear is set at intervals of the neutral position, so that the gear can be promoted rapidly, and the method is more suitable for vehicle driving characteristics.
As shown in fig. 2, 5 and 6, the shift lever assembly comprises a shift lever shaft 10 fixedly arranged, and a first shift fork assembly and a second shift fork assembly which are sleeved on the shift lever shaft 10 and can axially slide along the shift lever shaft 10; the first shifting fork assembly comprises a first seat board 11 which is in a shape like a Chinese character' [, a fork handle 14 which is positioned in an opening of the first seat board 11 and is used for shifting a first sliding gear 24 to be connected and driven, two cylindrical springs 12 and two clamping sleeves 27, wherein the opening of the first seat board 11 faces upwards, the two side plates of the opening of the first seat board 11 are vertically penetrated through by the poking rod shaft 10, the fork handle 14 of the first shifting fork can be sleeved on the poking rod shaft in a sliding manner, a first guide post 30 at the bottom of the fork handle stretches into a strip hole at the inner bottom of the opening of the first seat board 11, the first guide post 30 can slide in the strip hole along the direction parallel to the poking rod shaft 10, the fork handles are in sleeve shapes, two ends of the fork handles are respectively tightly attached to the poking rod shaft 10 and can axially slide along the poking rod shaft 10, one end of each clamping sleeve 27 is provided with a circular groove, one end of each sliding connecting plate 13 is clamped in the circular groove, the other end of each clamping sleeve 27 is buckled on the bottom plate of the first seat board 11, the other can be pressed against the corresponding cylindrical spring 10 along the bottom plate 12, the two end faces of the poking rod 10 are sleeved on the corresponding cylindrical springs 12, and the two end faces of the two side plates are pressed against the corresponding cylindrical springs 12, and the two end faces of the two cylindrical springs 12 are respectively pressed against the corresponding cylindrical springs 12 are sleeved on the two end faces of the side plates 12, and the corresponding cylindrical springs 12 are pressed against the two ends of the corresponding side plates 12, and the two ends are pressed against the cylinder shafts 12, and the corresponding ends are pressed against the cylinder springs 12, and the cylinder shafts 12, and the two ends are tightly 12, and the one end, and the two ends can be tightly and the one end, and the one side and can 18, and the one is. The second shifting fork assembly comprises a second seat board 17 which is in a shape like a Chinese character '[', a fork handle 16 which is positioned in an opening of the second seat board 17 and is used for shifting a second sliding gear 25 to be connected and driven, and a cylindrical compression spring 18, a strip-shaped hole is arranged at the inner bottom of the opening of the second seat board 17, a second guide post 31 is arranged at the bottom of the fork handle 16 of the second shifting fork, the second guide post 31 stretches into the strip-shaped hole and can slide in the strip-shaped hole along the direction parallel to the shifting rod shaft 10, a circular concave cavity is arranged at one end of the second shifting fork handle close to the first shifting fork assembly along the axial direction of the second shifting fork handle, one end of the compression spring 18 in a squeezing state stretches into the concave cavity, and the other end of the compression spring is tightly connected with the inner wall of the side plate at the opening of the second seat board 17. And sliding columns 26 are fixed on outsoles at openings of the ends, close to the first seat board 17 and the second seat board 17, of the sliding columns 26, are positioned in the gear shifting grooves 901 and drive corresponding shifting forks to shift corresponding sliding gears to realize gear shifting when the gear shifting columns 9 rotate.
The gear shift lever assembly, the shift lever assembly and the gear shift assembly are all arranged in a single casing (not shown in the figure), an output shaft in the transmission shaft assembly is directly meshed with an input gear (not shown in the figure) in a rear axle gear box (not shown in the figure), the rear axle gear box can be designed according to the size and specific shape adaptability of the gear shift lever assembly, the shift lever assembly and the gear shift assembly, the number of transmission shafts can be flexibly designed according to specific transmission ratios, the specific structural form of the gear shift lever assembly, the shift lever assembly and the gear shift assembly are not particularly limited and described in detail, the transmission speed change mechanism formed by the gear shift lever assembly, the shift lever assembly and the gear shift assembly in the embodiment is simple and compact in structure, and is very suitable for being directly connected with a rear axle gear box in a transmission mode, and the transmission speed change mechanism is not required to be arranged at an open position far away from a rear axle as in a traditional transmission speed change mode, so that a large section of intermediate transmission chains can be directly removed, and the transmission efficiency is more stable under the premise of keeping high efficiency.
As shown in fig. 2 and 7, the gear shifting assembly includes a plurality of transmission shaft assemblies, wherein the transmission shafts of the two transmission shaft assemblies are respectively provided with a first sliding gear 24 and a second sliding gear 24, one ends of the two sliding gears are coaxially connected with a movable sleeve 23, the two sliding gears and the movable sleeve 23 are rotatably sleeved on the transmission shafts where the two sliding gears and the movable sleeve are respectively located, an external spline structure is axially arranged on the outer cylindrical surface of the movable sleeve 23, the transmission shafts are fixedly sleeved with a fixed sleeve 22 at a position close to the sliding cylinder, external splines are arranged on the fixed sleeve 22, an internal spline sleeve 21 in spline fit with the fixed sleeve 22 is sleeved outside the fixed sleeve 22, and fork heads of the two fork assemblies are respectively clamped outside the internal spline sleeve 21 and can drive the internal spline sleeve 21 to axially slide to a position simultaneously matched with the movable sleeve 23 and the fixed sleeve 22. For the corresponding spline structures on the inner spline housing 21, the fixed housing 22 and the movable housing 23, the spline tooth shapes are preferably selected to be the same, and the tooth shapes with different sizes can be selected as long as the condition that the inner spline housing 21 can be simultaneously connected with the spline structures outside the movable housing 23 and the fixed housing 22 in a meshed manner is satisfied. Namely, in the rotation process of the gear shifting column 9, the shifting fork pushes one of the internal spline sleeves 21 to axially move to a position where the adjacent fixed sleeve 22 and the movable sleeve 23 are bridged, so that the corresponding sliding gear and the transmission shaft where the fixed sleeve 22 is positioned are changed from rotatable fit into fixed fit, and the sliding gear starts to work as a transmission gear, and gear shifting and speed changing are realized. The existence of the cylindrical spring 12 makes the corresponding shifting fork movement more timely and reliable, when the sliding column 26 moves to the deformation section of the gear shifting groove 901, the sliding column 26 does not purely do circular movement relative to the circle center of the gear shifting column 9, but is assisted by an offset movement which changes along the axial direction of the gear shifting column 9 towards the path of the gear shifting groove 901, so that the sliding column 26 moves towards the axial direction of the gear shifting shaft 8 or the shifting fork moves towards the axial direction of the shifting fork rod, and the shifting fork is more stable under the elastic action of the cylindrical spring 12, and shaking does not occur, so that the inner spline sleeve 21 bridges the fixed sleeve 22 and the movable sleeve 23.
Further, the gear shifting groove 901 on one gear shifting column 9 is provided with two turning groove parts which are respectively arched towards the two ends of the axis of the gear shifting column 9, the gear shifting groove 901 of the other gear shifting column 9 is provided with one turning groove part which is arched towards the outer part of the gear shifting column 9, and the design ensures that the groove diameter change of the gear shifting groove 901 is consistent with the gear shifting movement direction of the shifting lever assembly, the gear shifting effect is better, and the gear shifting is more accurate and timely.
Further, two cylindrical gears 3 with different sizes are fixed on the part of the output shaft of the motor 1 extending out of the end face of the motor 1 shell, wherein the smaller cylindrical gears 3 are arranged by the end face of the motor 1 shell, a mandrel 28 parallel to the output shaft is further arranged on the end face of the motor 1 shell, and two gears capable of being meshed with the two cylindrical gears 3 on the output shaft are arranged on the mandrel 28. The design ensures that the output of the motor 1 for gear shifting is more stable, the transmission of the worm wheel 4 and worm 2 mechanism is stable, and the promotion effect is realized for the coordination change relation between the gear shifting groove 901 and the sliding column 26.
Further, the fork head is a semicircular arc-shaped strip plate, so that the fork head is convenient to be connected and matched with a circular groove on the inner spline housing 21, and the inner spline housing 21 is rapidly stirred to realize the transmission connection of the sliding gear and a transmission shaft where the sliding gear is positioned.
Further, the part of the sliding connecting plate 13 clamped in the annular groove is of a semicircular arc slat structure, the part buckled on the bottom plate of the first seat plate 11 is pi-shaped, two sides of the middle part of the bottom plate of the first seat plate 11 outwards extend to form limiting protruding parts 29, the protruding parts 29 separate and isolate the two sliding connecting plates 13, so that the sliding connecting plate slides more stably, meanwhile, a better guiding effect is achieved for axial sliding of the shifting fork, and the stability and accuracy of gear shifting are improved.
Further, the end parts of the transmission shafts where the two sliding gears are located are respectively provided with a rotation speed sensor used for detecting the rotation speed of the transmission shafts, and after signals acquired by the rotation speed sensors are transmitted to the controller, the controller drives the motor 1 to rotate. The structural design can be manual or automatic during gear shifting, realizes manual and automatic integration, is connected with the motor 1 except for directly installing a control switch, and can also adopt an automatic speed changing system matched with the rotation speed sensor and the controller.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (8)
1. An automatic gear shifting driving system for a vehicle is characterized in that: comprises a gear shifting mechanism, a rear axle gear box and a controller; the gear shifting mechanism comprises a gear shifting lever assembly, a deflector rod assembly and a gear shifting assembly;
the gear shifting lever assembly comprises a motor, a worm gear mechanism, a gear shifting shaft and a gear shifting column, wherein an output shaft of the motor is connected with a worm, a worm wheel is fixed on the gear shifting shaft to drive the gear shifting shaft to rotate, the gear shifting column is cylindrical and fixed on the gear shifting shaft, and a circle of gear shifting grooves are formed in the cylindrical surface of the gear shifting column along the circumferential direction of the cylindrical surface of the gear shifting column; a flat plate and a baffle plate which are opposite to each other are sleeved on a gear shifting shaft between a gear shifting column and a worm gear by the worm gear, the gear shifting shaft can freely rotate after passing through the flat plate, a pair of magnetic sensors are arranged on the end face of the flat plate, the baffle plate is fixed on the gear shifting shaft, a plurality of pairs of mounting holes are arranged on the end face of the baffle plate, when the worm gear drives the gear shifting shaft to synchronously rotate together, each pair of mounting holes sequentially pass through the positions opposite to the pair of magnetic sensors, one magnetic steel is embedded in one pair of mounting holes at most so that the pair of mounting holes are neutral sensing positions, and one magnetic steel is embedded in each of the other pairs of mounting holes so that the pair of mounting holes are non-neutral sensing positions;
the gear shifting assembly comprises a plurality of transmission shaft assemblies, wherein a first sliding gear and a second sliding gear are respectively arranged on transmission shafts of the two transmission shaft assemblies, one ends of the two sliding gears are coaxially connected with a movable sleeve, the two sliding gears and the movable sleeve are rotatably sleeved on the transmission shafts where the two sliding gears and the movable sleeve are respectively arranged, an external spline structure is arranged on the outer cylindrical surface of the movable sleeve along the axial direction of the movable sleeve, a fixed sleeve is fixedly sleeved on the transmission shaft at a position close to a sliding cylinder, an external spline is arranged on the fixed sleeve, and an internal spline sleeve matched with the external spline is sleeved outside the fixed sleeve; the shifting lever assembly comprises a shifting lever shaft fixedly arranged, a first shifting fork assembly and a second shifting fork assembly which are sleeved on the shifting lever shaft and can axially slide along the shifting lever shaft, the shifting fork assembly comprises a shifting fork head extending towards the upper part and a sliding column extending towards the lower part, the shifting fork head is used for shifting a corresponding sliding gear to connect and drive, and the free end at the bottom of the sliding column is positioned in a shifting groove and axially moves towards the shifting lever under the guiding action of the shifting groove when the shifting column rotates, so that the shifting fork head is clamped outside an inner spline sleeve and can drive the inner spline sleeve to axially slide to a position matched with the movable sleeve and the fixed sleeve;
the gear shifting lever assembly, the deflector rod assembly and the gear shifting assembly are all arranged in a single machine shell, an output shaft in the transmission shaft assembly is directly meshed with an input gear in a rear axle gear box, and the controller is in signal communication with the magnetic sensor and drives the gear shifting shaft to rotate through a motor to realize automatic gear shifting.
2. The vehicle automatic shift drive system according to claim 1, characterized in that: the gear shifting groove on one gear shifting column is provided with two bent groove parts which are respectively arched towards the two ends of the axis of the gear shifting column, and the gear shifting groove of the other gear shifting column is provided with one bent groove part which is arched towards the outer part of the gear shifting column.
3. The vehicle automatic shift drive system according to claim 1, characterized in that: the neutral sensing position is located between two pairs of mounting holes serving as 2 nd gear and 3 rd gear, and the rest pair of mounting holes serve as 1 st gear.
4. The vehicle automatic shift drive system according to claim 3, characterized in that: the part of the motor output shaft extending out of the motor shell end face is fixed with two cylindrical gears with different sizes, the smaller cylindrical gears are arranged by the motor shell end face, the motor shell end face is also provided with a mandrel parallel to the output shaft, and the mandrel is provided with two gears which can be meshed with the two cylindrical gears on the output shaft respectively.
5. The vehicle automatic gear shift drive system according to any one of claims 1 to 4, wherein: the end parts of the transmission shafts where the two sliding gears are located are respectively provided with a rotation speed sensor used for detecting the rotation speed of the transmission shafts, and the rotation speed sensors acquire signals and transmit the signals to the controller so that the controller drives the motor to rotate.
6. The vehicle automatic shift drive system according to claim 1, characterized in that: the first shifting fork assembly comprises a first seat board in a' shape, a fork handle, two cylindrical springs and two clamping sleeves, wherein the fork handle is positioned in an opening of the first seat board and is used for shifting a first shifting fork of a first sliding gear for connecting and driving, the opening of the first seat board is upward, a shifting rod shaft vertically penetrates through two side plates of the opening of the first seat board, the fork handle of the first shifting fork can be sleeved on the shifting fork shaft in an axial sliding manner, a first guide column at the bottom of the fork handle stretches into a strip hole in the inner bottom of the opening of the first seat board, the first guide column can slide in the strip hole along the direction parallel to the shifting rod shaft, the fork handle is sleeve-shaped, the two ends of the fork handle are respectively tightly attached with the clamping sleeves which are sleeved on the shifting rod shaft and can axially slide along the shifting rod shaft, one end of each clamping sleeve is clamped in the annular groove, the other end of each sliding connecting plate is buckled on a bottom plate of the first seat board and can axially slide along the shifting rod shaft, the two cylindrical springs are respectively sleeved on the shifting rod shaft in the axial direction, and the two cylindrical springs are compressed between the corresponding side plates and the corresponding clamping sleeves;
the second shifting fork assembly comprises a second seat plate in a shape of a' [, a fork handle and a cylindrical compression spring, wherein the fork handle and the cylindrical compression spring are both positioned in an opening of the second seat plate and are used for stirring a second shifting fork for connecting and driving a second sliding gear, a strip-shaped hole is formed in the inner bottom of the opening of the second seat plate, a second guide column is arranged at the bottom of the fork handle of the second shifting fork, the second guide column stretches into the strip-shaped hole and can slide in the strip-shaped hole along a direction parallel to a shifting rod shaft, a circular concave cavity is formed in one end of the second shifting fork handle close to the first shifting fork assembly along the axial direction of the second shifting fork handle, one end of the compression spring in a extrusion state stretches into the concave cavity, and the other end of the compression spring is tightly connected with the inner wall of a side plate at the opening of the second seat plate; and sliding columns are fixed on outsoles at the opening parts of the ends, close to the first seat board and the second seat board, of the outsoles, are positioned in the gear shifting grooves and drive corresponding shifting forks to shift corresponding sliding gears to realize gear shifting when the gear shifting columns rotate.
7. The vehicle automatic shift drive system according to claim 6, characterized in that: the fork head is a semicircular arc slat.
8. The vehicle automatic shift drive system according to claim 7, characterized in that: the sliding connecting plate is clamped in the annular groove and is of a semicircular arc slat structure, the part buckled on the bottom plate of the first seat plate is of a pi-shaped structure, two sides of the middle part of the bottom plate of the first seat plate outwards extend to form limiting protruding parts, and the protruding parts separate and isolate the two sliding connecting plates.
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| CN201811590595.5A CN109838513B (en) | 2018-12-25 | 2018-12-25 | Automatic gear shifting driving system for vehicle |
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| CN201811590595.5A CN109838513B (en) | 2018-12-25 | 2018-12-25 | Automatic gear shifting driving system for vehicle |
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| CN109838513B true CN109838513B (en) | 2023-07-21 |
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| CN110219950A (en) * | 2019-07-05 | 2019-09-10 | 覃子飞 | Shift assembly, speed changer and vehicle with the shift assembly |
| CN110671486A (en) * | 2019-08-26 | 2020-01-10 | 重庆宏美科技有限公司 | Auxiliary output mechanism |
| CN113404824B (en) * | 2021-07-14 | 2024-05-17 | 重庆宗王动力发动机有限公司 | Multi-gear power output system |
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| CN105276155A (en) * | 2014-05-30 | 2016-01-27 | 广州汽车集团股份有限公司 | Gearshift mechanism |
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| CN105276155A (en) * | 2014-05-30 | 2016-01-27 | 广州汽车集团股份有限公司 | Gearshift mechanism |
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