CN112855869A - Automatic transmission with backstop function - Google Patents
Automatic transmission with backstop function Download PDFInfo
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- CN112855869A CN112855869A CN202110004782.6A CN202110004782A CN112855869A CN 112855869 A CN112855869 A CN 112855869A CN 202110004782 A CN202110004782 A CN 202110004782A CN 112855869 A CN112855869 A CN 112855869A
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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
- F16H3/06—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion with worm and worm-wheel or gears essentially having helical or herring-bone teeth
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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
- F16H3/002—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having teeth movable out of mesh
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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
- F16H3/20—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear
- F16H3/22—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially
- F16H3/30—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially with driving and driven shafts not coaxial
- F16H3/32—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially with driving and driven shafts not coaxial and an additional shaft
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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
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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
- F16H2200/0047—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising five forward speeds
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
- Gear Transmission (AREA)
Abstract
The invention discloses an automatic transmission with a non-return function, which comprises a shell, a worm wheel, an output shaft, a motor, a threaded rod, a first gear tower, a second gear tower, an input shaft, a sliding frame, a driven gear, a driving gear, a sealing cover and an electric push rod, wherein the shell is a supporting main body, the input shaft and the shell form a rotating pair and drive the first gear tower to rotate through a first bevel gear and a second bevel gear, the first gear tower drives the second gear tower to rotate through a transmission device formed by the sliding frame, a first retaining rod, the driven gear, a driven pinion, a second retaining rod, a transmission gear, a driving pinion and a retaining plate, the second gear tower drives a fourth bevel gear and the worm to rotate through a third bevel gear, the worm drives the worm wheel and the output shaft to rotate, the electric push rod is used for controlling the on-off of transmission between the first gear tower and the second gear, the motor changes the position of the sliding frame through the threaded rod, and therefore gear change between the input shaft and the output shaft is achieved.
Description
Technical Field
The invention relates to the field of transmissions, in particular to an automatic transmission with a non-return function.
Background
Automatic transmissions have the advantages of easy operation, comfortable driving, and reduced driver fatigue, and have become a development direction for modern car configurations. The automobile with the automatic transmission can automatically change speed and change torque according to the road surface condition, and a driver can watch the road traffic with full attention without being confused by gear shifting operation.
Three types of automatic transmissions for automobiles are common: respectively a hydraulic Automatic Transmission (AT), a mechanical stepless automatic transmission (CVT) and an electric control mechanical automatic transmission (AMT); the AT transmission has slow response to speed change, obvious gear shift and pause feeling, relatively high oil consumption, and obviously increased volume and weight of the transmission case after the gears are increased, so that the AT transmission is restricted from developing to more gears and higher smoothness direction, and the price of the AT transmission is relatively expensive; the CVT transmission utilizes a steel belt to carry out stepless speed change, the gear shifting smoothness is good, but the manufacturing and maintenance costs are high, the upper limit of transmittable torque is low, and the transmission steel belt is easy to wear, so that the service life of the CVT transmission is limited; the technical difficulty and the manufacturing cost of the AMT transmission are relatively low, but the gear shifting and the gear shifting are strong, and the power interruption can be obviously sensed during gear shifting due to long gear shifting time, and even the situation of vehicle sliding can be caused during a slope. Most of the core patents and technologies of the existing common automatic transmissions are mastered by foreign manufacturers, so that the development of the automatic transmissions with reasonable functions, stability and reliability has obvious economic benefit and social significance.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide an automatic transmission with a non-return function, which is novel in structure and small in occupied space.
The technical scheme adopted by the invention is as follows: an automatic transmission having a backstop function, comprising a housing, a worm, a fourth bevel gear, a worm wheel, an output shaft, a motor, a threaded rod, a third bevel gear, a second gear tower, a first gear tower, a second bevel gear, a first bevel gear, an input shaft, a carriage, a first retaining rod, a driven gear, a driven pinion, a second retaining rod, a transmission gear, a drive pinion, a seal cover, a retaining piece, an electric push rod, characterized in that: the shell is a supporting body, the input shaft and the shell form a rotating pair, the input shaft and the shell drive a first gear tower to rotate through a first bevel gear and a second bevel gear, the first gear tower drives a second gear tower to rotate through a transmission device formed by a sliding frame, a first retaining rod, a driven gear, a driven pinion, a second retaining rod, a transmission gear, a driving pinion and a retaining sheet, the second gear tower drives a fourth bevel gear and a worm to rotate through a third bevel gear, the worm drives a worm gear and an output shaft to rotate, an electric push rod is used for controlling the on-off of transmission between the first gear tower and the second gear tower, a motor is installed on a sealing cover, and the position of the sliding frame is changed through rotating a threaded rod, so that the gear change between the input shaft and the output shaft is realized.
Preferably, the housing is a support body of the transmission, four guide rails are obliquely arranged on two side walls of the housing, the sealing cover is tightly mounted on the left side of the housing through screws, the input shaft is mounted on the upper side of the housing and forms a rotation pair with the housing through three bearings, the first bevel gear is coaxially and tightly connected with the lower end of the input shaft, the output shaft is mounted at the right end of the housing and forms a rotation pair with the housing through two bearings, the worm gear is coaxially and tightly connected with the left end of the output shaft, the worm is horizontally mounted in the housing and forms a rotation pair, the worm and the worm gear form a worm gear meshing transmission relationship, and the fourth bevel gear is.
Preferably, a five-layer gear structure is arranged on the first gear tower, the reference circle diameters of the five-layer gear structure are in an equal-difference number sequence and form five gears, the first gear tower is arranged in the shell and forms a rotating pair, the large end of the first gear tower faces to the left, the second gear is coaxially and fixedly connected with the left end of the first gear tower, the second gear and the first bevel gear form gear meshing transmission, the parameters of the five-layer gear structure arranged on the second gear tower are the same as those of the five-layer gear structure on the first gear tower, the second gear tower is arranged in the shell and forms a rotating pair, the large end of the second gear tower faces to the left, the second gear tower is positioned above the first gear tower, the central axes of the first gear tower and the second gear tower are parallel, the third bevel gear and the right end of the second gear tower are coaxially and fixedly connected, and the third.
Preferably, the sliding frame is arranged in the shell, the two sliding block structures arranged at the left end of the sliding frame and the two sliding block structures arranged at the right end of the sliding frame are respectively matched and arranged with four guide rails on two side walls in the shell, so that the sliding frame and the shell form a moving pair, the sliding frame is provided with a threaded hole close to the left end, a round hole and a long slotted hole close to the middle position, the second retaining rod is arranged in the round hole to form a rotating pair, two transmission gears are respectively and coaxially and tightly arranged at two ends of the second retaining rod, the first retaining rod can slide in the long slotted hole, the driving gear is arranged at the lower side between the first retaining rod and the second retaining rod, two driving auxiliary gears are respectively and coaxially and tightly arranged at two ends of the driving gear, two ends of the driving gear are rotationally connected with the first retaining rod through two retaining, the driving pinion is always meshed with the transmission gear, the driven gear is located on the upper side between the first retaining rod and the second retaining rod, the two driven pinions are respectively and coaxially and fixedly mounted at two ends of the driven gear, two ends of the driven gear are rotationally connected with the first retaining rod through the two retaining pieces, and two ends of the driven gear are also rotationally connected with the second retaining rod through the two retaining pieces, so that the driven pinions are always meshed with the transmission gear.
Preferably, the rear end of the motor is fixedly mounted on the right side of the sealing cover through a screw, an output shaft of the motor is fixedly connected with a threaded rod, the threaded rod is matched with the threaded hole to be mounted to form threaded transmission, the motor rotates to change the gear position of the sliding frame through driving the threaded rod, the left end of the electric push rod and the first retaining rod form a rotating pair, and the right end of the electric push rod is fixedly connected with the right end of the sliding frame.
In an initial state, the electric push rod extends and pushes the first retaining rod to slide leftwards in the long slot hole, under the action of the pushing force of the eight retaining pieces, the driving gear moves downwards and is meshed with one gear of the first gear tower, and the driven gear moves upwards and is meshed with a corresponding gear on the second gear tower.
After the power from an engine or a motor drives an input shaft to rotate, a first bevel gear drives a first gear tower to rotate through a second bevel gear, the first gear tower enables a driving gear and a driving pinion to rotate through a gear meshing relationship, the driving pinion drives a driven pinion and a driven gear to rotate through a gear meshing relationship between the driving gear and the driven pinion, the driven gear drives a second gear tower and a third bevel gear to rotate through a gear meshing relationship between the driven gear and the second gear tower, the third bevel gear drives a worm to rotate through a fourth bevel gear, the worm drives an output shaft to rotate through the worm gear, and the output shaft transmits the power to wheels or other execution mechanisms.
The worm and gear transmission structure has a self-locking function, so that power can be transmitted to the output shaft only from the input shaft but not reversely, the transmission has a non-return function, stable parking on a slope is facilitated, and the condition of vehicle sliding in the slope can be prevented.
When gears need to be changed, firstly, the electric push rod contracts and pulls the first holding rod to move rightwards, under the action of the pulling force of the eight holding pieces, the driving gear moves upwards and is disengaged from the gear on the first gear tower, the driven gear moves downwards and is disengaged from the gear on the second gear tower, then the motor enables the sliding frame to move to a proper gear through the threaded rod, the electric push rod extends and pushes the first holding rod to move leftwards, under the action of the pushing force of the eight holding pieces, the driving gear moves downwards and is engaged with the corresponding gear on the first gear tower, and the driven gear moves upwards and is engaged with the corresponding gear on the second gear tower, so that the gear shifting action is completed; the left end gear transmission ratio is the minimum, is applicable to high-speed driving, and the right end gear transmission ratio is the maximum, is applicable to low-speed driving.
The invention has the beneficial effects that:
firstly, when gears are changed, the driving gear is disengaged from the first gear tower, the driven gear is disengaged from the second gear tower, and then the positions of the driving gear and the driven gear are moved to change the gears, so that the transmission structure is very compact, and the problems of complex structure and large volume of a multi-gear transmission device are solved by innovative design;
the number of gears is easy to adjust, the gears can be increased by increasing the number of gears on the gear tower, the gears can be reduced by reducing the number of gears on the gear tower, the number of gears can be adjusted according to actual needs, the size of the gearbox cannot be changed greatly, and the normalization and modularization of the transmission are facilitated;
the transmission is internally provided with a worm and gear transmission structure with a self-locking function, so that the transmission has a non-return function, stable parking on a slope is facilitated, and the condition of sliding on the slope can be prevented;
the structure is compact, the occupied space is small, the volume and the weight of the whole vehicle or equipment can be effectively reduced, the energy consumption is favorably reduced, and the carbon emission is reduced.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the transmission.
Fig. 2 is a schematic longitudinal sectional view of the transmission.
Fig. 3 is a schematic longitudinal sectional view of the transmission.
Fig. 4 is a partial schematic view of the shifting mechanism.
Fig. 5 is a schematic diagram of a transverse cross-sectional structure of the transmission.
Fig. 6 is a schematic diagram of a transverse cross-sectional structure of the transmission.
Fig. 7 is an exploded schematic view of the transmission.
Fig. 8 is a schematic view of the sliding frame.
Reference numerals: 1 shell, 2 worms, 3 fourth bevel gears, 4 worm gears, 5 output shafts, 6 motors, 7 threaded rods, 8 third bevel gears, 9 second gear towers, 10 first gear towers, 11 second bevel gears, 12 first bevel gears, 13 input shafts, 14 sliding frames, 14.1 threaded holes, 14.2 round holes, 14.3 slotted holes, 15 first retaining rods, 16 driven gears, 16.1 driven auxiliary gears, 17 second retaining rods, 17.1 transmission gears, 18 driving gears, 18.1 driving auxiliary gears, 19 sealing covers, 20 retaining pieces and 21 electric push rods.
Detailed Description
The invention will be further described with reference to the drawings and specific embodiments, which are illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 8, an automatic transmission having a non-return function includes a housing 1, a worm 2, a fourth bevel gear 3, a worm wheel 4, an output shaft 5, a motor 6, a threaded rod 7, a third bevel gear 8, a second gear tower 9, a first gear tower 10, a second bevel gear 11, a first bevel gear 12, an input shaft 13, a carriage 14, a first holding rod 15, a driven gear 16, a driven pinion 16.1, a second holding rod 17, a transmission gear 17.1, a driving gear 18, a driving pinion 18.1, a seal cover 19, a holding plate 20, an electric push rod 21, and is characterized in that: the housing 1 is a supporting body, the input shaft 13 and the housing 1 form a rotation pair, and the first bevel gear 12 and the second bevel gear 11 drive the first gear tower 10 to rotate, the first gear tower 10 drives the second gear tower 9 to rotate through a transmission device formed by a sliding frame 14, a first holding rod 15, a driven gear 16, a driven pinion 16.1, a second holding rod 17, a transmission gear 17.1, a driving gear 18, a driving pinion 18.1 and a holding sheet 20, the second gear tower 9 drives the fourth bevel gear 3 and the worm 2 to rotate through a third bevel gear 8, the worm 2 drives the worm gear 4 and the output shaft 5 to rotate, an electric push rod 21 is used for controlling the on-off of the transmission between the first gear tower 10 and the second gear tower 9, the motor 6 is arranged on a sealing cover 19, and the position of the carriage 14 is changed by rotating the threaded rod 7, thereby achieving gear change between the input shaft 13 and the output shaft 5.
The shell 1 is a supporting body of the transmission, four guide rails are obliquely arranged on two side walls of the shell, a sealing cover 19 is fixedly mounted on the left side of the shell 1 through screws, an input shaft 13 is mounted on the upper side of the shell 1 and forms a rotating pair with the shell 1 through three bearings, a first bevel gear 12 is coaxially and fixedly connected with the lower end of the input shaft 13, an output shaft 5 is mounted on the right end of the shell 1 and forms a rotating pair with the shell 1 through two bearings, a worm wheel 4 is coaxially and fixedly connected with the left end of the output shaft 5, a worm 2 is horizontally mounted in the shell 1 and forms a rotating pair, the worm 2 and the worm wheel 4 form a worm-gear meshing transmission relationship, and a fourth bevel gear.
The first gear tower 10 is provided with five layers of gear structures, the reference circle diameters of the five layers of gear structures are in an arithmetic progression and form five gears, the first gear tower 10 is arranged in the shell 1 and forms a revolute pair, the big end is towards the left and the small end is towards the right, the second bevel gear 11 is coaxially and tightly connected with the left end of the first gear tower 10, the second bevel gear 11 and the first bevel gear 12 form gear mesh transmission, the parameters of a five-layer gear structure arranged on the second gear tower 9 are the same as those of the five-layer gear structure on the first gear tower 10, the second gear tower 9 is arranged in the shell 1 and forms a revolute pair, and the big end is left to the right tip, and second gear tower 9 is located first gear tower 10 top, and the central axis of both is parallel to each other, and third bevel gear 8 and the coaxial fastening connection of second gear tower 9 right-hand member, third bevel gear 8 and fourth bevel gear 3 constitute the gear engagement transmission.
The sliding frame 14 is installed inside the casing 1, two sliding block structures arranged at the left end and two sliding block structures arranged at the right end of the sliding frame 14 are respectively installed in a matching way with four guide rails on two side walls inside the casing 1, so that the sliding frame 14 and the casing 1 form a moving pair, the sliding frame 14 is provided with a threaded hole 14.1 close to the left end, a round hole 14.2 and a long slotted hole 14.3 close to the middle position, a second retaining rod 17 is installed in the round hole 14.2 to form a rotating pair, two transmission gears 17.1 are respectively and coaxially and tightly installed at two ends of the second retaining rod 17, the first retaining rod 15 can slide in the long slotted hole 14.3, the driving gear 18 is positioned at the lower side between the first retaining rod 15 and the second retaining rod 17, two driving auxiliary gears 18.1 are respectively and coaxially and tightly installed at two ends of the driving gear 18, the two ends of the driving gear 18 are rotatably connected with the first retaining rod 15 through two retaining pieces 20, and the two ends of the, the driving pinion 18.1 is always meshed with the transmission gear 17.1, the driven gear 16 is positioned on the upper side between the first retaining rod 15 and the second retaining rod 17, the two driven pinions 16.1 are respectively and coaxially and tightly mounted at two ends of the driven gear 16, two ends of the driven gear 16 are rotatably connected with the first retaining rod 15 through two retaining pieces 20, and two ends of the driven gear 16 are also rotatably connected with the second retaining rod 17 through two retaining pieces 20, so that the driven pinion 16.1 is always meshed with the transmission gear 17.1.
The rear end of the motor 6 is fixedly arranged on the right side of the sealing cover 19 through screws, an output shaft of the motor 6 is fixedly connected with the threaded rod 7, the threaded rod 7 is matched with the threaded hole 14.1 to be installed to form threaded transmission, the motor 6 rotates through driving the threaded rod 7 to change the gear position of the sliding frame 14, the left end of the electric push rod 21 and the first retaining rod 15 form a rotating pair, and the right end of the electric push rod 21 is fixedly connected with the right end of the sliding frame 14.
In the initial state, the electric push rod 21 extends and pushes the first holding rod 15 to slide leftward in the slot hole 14.3, and under the thrust of the eight holding pieces 20, the driving gear 18 moves downward and engages with one gear of the first gear tower 10, and the driven gear 16 moves upward and engages with a corresponding one gear of the second gear tower 9.
After the power from the engine or the motor drives the input shaft 13 to rotate, the first bevel gear 12 drives the first gear tower 10 to rotate through the second bevel gear 11, the first gear tower 10 drives the driving gear 18 and the driving pinion 18.1 to rotate through the gear meshing relationship, the driving pinion 18.1 drives the driven pinion 16.1 and the driven gear 16 to rotate through the gear meshing relationship between the driving gear 17.1 and the driven pinion 16.1, the driven gear 16 drives the second gear tower 9 and the third bevel gear 8 to rotate through the gear meshing relationship with the second gear tower 9, the third bevel gear 8 drives the worm 2 to rotate through the fourth bevel gear 3, the worm 2 drives the output shaft 5 to rotate through the worm wheel 4, and the output shaft 5 transmits the power to wheels or other execution mechanisms.
The worm and gear transmission structure has a self-locking function, so that power can be transmitted to the output shaft 5 from the input shaft 13 only and cannot be transmitted reversely, the transmission has a non-return function, stable parking on a slope is facilitated, and the condition of vehicle sliding in the slope can be prevented.
When the gear needs to be changed, firstly, the electric push rod 21 contracts and pulls the first retaining rod 15 to move rightwards, under the action of the pulling force of the eight retaining pieces 20, the driving gear 18 moves upwards and is disengaged from the gear on the first gear tower 10, the driven gear 16 moves downwards and is disengaged from the gear on the second gear tower 9, then after the motor 6 enables the sliding frame 14 to move to a proper gear through the threaded rod 7, the electric push rod 21 extends and pushes the first retaining rod 15 to move leftwards, under the action of the pushing force of the eight retaining pieces 20, the driving gear 18 moves downwards and is engaged with the corresponding gear on the first gear tower 10, and the driven gear 16 moves upwards and is engaged with the corresponding gear on the second gear tower 9, so that the gear shifting action is completed; the left end gear transmission ratio is the minimum, is applicable to high-speed driving, and the right end gear transmission ratio is the maximum, is applicable to low-speed driving.
The references to "front", "back", "left", "right", etc., are to be construed as references to orientations or positional relationships based on the orientation or positional relationship shown in the drawings or as orientations and positional relationships conventionally found in use of the product of the present invention, and are intended to facilitate the description of the invention and to simplify the description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Claims (3)
1. An automatic transmission with a backstop function, comprising a housing (1), a worm (2), a fourth bevel gear (3), a worm wheel (4), an output shaft (5), a motor (6), a threaded rod (7), a third bevel gear (8), a second gear tower (9), a first gear tower (10), a second bevel gear (11), a first bevel gear (12), an input shaft (13), a carriage (14), a first holding rod (15), a driven gear (16), a driven pinion (16.1), a second holding rod (17), a transmission gear (17.1), a drive gear (18), a drive pinion (18.1), a seal cover (19), a holding piece (20), and an electric push rod (21), characterized in that: the shell (1) is a supporting body, the input shaft (13) and the shell (1) form a rotating pair, and the first gear tower (10) is driven to rotate through a first bevel gear (12) and a second bevel gear (11), the first gear tower (10) drives a second gear tower (9) to rotate through a transmission device consisting of a sliding frame (14), a first retaining rod (15), a driven gear (16), a driven pinion (16.1), a second retaining rod (17), a transmission gear (17.1), a driving gear (18), a driving pinion (18.1) and a retaining sheet (20), the second gear tower (9) drives a fourth bevel gear (3) and a worm (2) to rotate through a third bevel gear (8), the worm (2) drives a worm gear (4) and an output shaft (5) to rotate, an electric push rod (21) is used for controlling the connection and disconnection of transmission between the first gear tower (10) and the second gear tower (9), the motor (6) is arranged on the sealing cover (19), and the position of the sliding frame (14) is changed by rotating the threaded rod (7), so that the gear change between the input shaft (13) and the output shaft (5) is realized.
2. An automatic transmission having a backstop function according to claim 1, characterized in that: the shell (1) is a support main body of the transmission, four guide rails are obliquely arranged on two side walls of the shell, a sealing cover (19) is fixedly mounted on the left side of the shell (1) through screws, an input shaft (13) is mounted on the upper side of the shell (1) and forms a rotating pair with the shell (1) through three bearings, a first bevel gear (12) is coaxially and fixedly connected with the lower end of the input shaft (13), an output shaft (5) is mounted at the right end of the shell (1) and forms a rotating pair with the shell (1) through two bearings, a worm wheel (4) is coaxially and fixedly connected with the left end of the output shaft (5), a worm (2) is horizontally mounted in the shell (1) and forms a rotating pair, the worm (2) and the worm wheel (4) form a worm gear and worm meshing transmission relationship, and a fourth bevel gear (3) is;
the first gear tower (10) is provided with a five-layer gear structure, the reference circle diameters of the five-layer gear structure are in an equal-difference number series and form five gears, the first gear tower (10) is arranged in the shell (1) and forms a revolute pair, the large end of the first gear tower is right to the left small end, a second bevel gear (11) is coaxially and fixedly connected with the left end of the first gear tower (10), the second bevel gear (11) and a first bevel gear (12) form gear meshing transmission, the parameters of the five-layer gear structure arranged on a second gear tower (9) are the same as those of the five-layer gear structure on the first gear tower (10), the second gear tower (9) is arranged in the shell (1) and forms a revolute pair, the large end of the second gear tower (9) is left to the right small end, the central axes of the second gear tower (9) are parallel to each other, a third bevel gear (8) is coaxially and fixedly connected with the right end of the second gear tower (9, the third bevel gear (8) and the fourth bevel gear (3) form gear engagement transmission;
the sliding frame (14) is arranged inside the shell (1), two sliding block structures arranged at the left end and two sliding block structures arranged at the right end of the sliding frame (14) are respectively matched and arranged with four guide rails on two side walls inside the shell (1), so that the sliding frame (14) and the shell (1) form a moving pair, a threaded hole (14.1) is arranged at the position, close to the left end, of the sliding frame (14), a round hole (14.2) and a long slotted hole (14.3) are arranged at the position, close to the middle of the sliding frame (14), of the sliding frame, a second retaining rod (17) is arranged in the round hole (14.2) to form a rotating pair, two transmission gears (17.1) are respectively and coaxially and fixedly arranged at two ends of the second retaining rod (17), a first retaining rod (15) can slide in the long slotted hole (14.3), a driving gear (18) is positioned at the lower side between the first retaining rod (15) and the second retaining rod (17, two ends of a driving gear (18) are rotationally connected with a first retaining rod (15) through two retaining pieces (20), two ends of the driving gear (18) are also rotationally connected with a second retaining rod (17) through the two retaining pieces (20), so that a driving pinion (18.1) is always meshed with a transmission gear (17.1), a driven gear (16) is positioned on the upper side between the first retaining rod (15) and the second retaining rod (17), the two driven pinions (16.1) are respectively and coaxially and fixedly arranged at two ends of the driven gear (16), two ends of the driven gear (16) are rotationally connected with the first retaining rod (15) through the two retaining pieces (20), and two ends of the driven gear (16) are also rotationally connected with the second retaining rod (17) through the two retaining pieces (20), so that the driven pinion (16.1) is always meshed with the transmission gear (17.1);
the rear end of the motor (6) is fixedly arranged on the right side of the sealing cover (19) through a screw, an output shaft of the motor (6) is fixedly connected with a threaded rod (7), the threaded rod (7) is matched and arranged with a threaded hole (14.1) to form threaded transmission, the motor (6) rotates through driving the threaded rod (7) to change the gear position of the sliding frame (14), the left end of the electric push rod (21) and the first retaining rod (15) form a rotating pair, and the right end of the electric push rod (21) is fixedly connected with the right end of the sliding frame (14);
in the initial state, the electric push rod (21) extends and pushes the first retaining rod (15) to slide towards the left in the long slotted hole (14.3), under the thrust action of the eight retaining pieces (20), the driving gear (18) moves downwards and is meshed with one gear of the first gear tower (10), and the driven gear (16) moves upwards and is meshed with a corresponding gear of the second gear tower (9).
3. An automatic transmission having a backstop function according to claim 1, characterized in that: after the power from an engine or an electric motor drives an input shaft (13) to rotate, a first bevel gear (12) drives a first gear tower (10) to rotate through a second bevel gear (11), the first gear tower (10) enables a driving gear (18) and a driving pinion (18.1) to rotate through a gear meshing relationship, the driving pinion (18.1) is connected with a transmission gear (17.1), the driven pinion (16.1) and the driven gear (16) are driven to rotate through the gear meshing relationship between the driven pinion (16.1) and the driven gear (16), the driven gear (16) drives the second gear tower (9) and the third bevel gear (8) to rotate through the gear meshing relationship with the second gear tower (9), the third bevel gear (8) drives the worm (2) to rotate through the fourth bevel gear (3), the worm (2) drives the output shaft (5) to rotate through the worm wheel (4), and the output shaft (5) transmits power to wheels or other execution mechanisms;
the worm and gear transmission structure has a self-locking function, so that power can be transmitted to the output shaft (5) only from the input shaft (13) but not reversely, the transmission has a non-return function, stable parking on a slope is facilitated, and the condition of vehicle sliding in the slope can be prevented;
when gears need to be changed, firstly, the electric push rod (21) contracts and pulls the first retaining rod (15) to move rightwards, under the action of the pulling force of the eight retaining pieces (20), the driving gear (18) moves upwards and is disengaged from the gear on the first gear tower (10), the driven gear (16) moves downwards and is disengaged from the gear on the second gear tower (9), then the motor (6) enables the sliding frame (14) to move to a proper gear through the threaded rod (7), the electric push rod (21) extends and pushes the first retaining rod (15) to move leftwards, under the action of the pushing force of the eight retaining pieces (20), the driving gear (18) moves downwards and is engaged with the corresponding gear on the first gear tower (10), and the driven gear (16) moves upwards and is engaged with the corresponding gear on the second gear tower (9), so that the gear shifting action is completed; the left end gear transmission ratio is the minimum, is applicable to high-speed driving, and the right end gear transmission ratio is the maximum, is applicable to low-speed driving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110004782.6A CN112855869A (en) | 2021-01-04 | 2021-01-04 | Automatic transmission with backstop function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110004782.6A CN112855869A (en) | 2021-01-04 | 2021-01-04 | Automatic transmission with backstop function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112855869A true CN112855869A (en) | 2021-05-28 |
Family
ID=76001452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110004782.6A Withdrawn CN112855869A (en) | 2021-01-04 | 2021-01-04 | Automatic transmission with backstop function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112855869A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115057352A (en) * | 2022-08-18 | 2022-09-16 | 河南华工实业集团有限公司 | Embedded gear ratio speed governing crane wheel |
-
2021
- 2021-01-04 CN CN202110004782.6A patent/CN112855869A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115057352A (en) * | 2022-08-18 | 2022-09-16 | 河南华工实业集团有限公司 | Embedded gear ratio speed governing crane wheel |
| CN115057352B (en) * | 2022-08-18 | 2022-11-15 | 河南华工实业集团有限公司 | Embedded gear ratio speed governing crane wheel |
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Application publication date: 20210528 |
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| WW01 | Invention patent application withdrawn after publication |