KR19990072355A - Motor vehicle with a device for automated gearbox operation - Google Patents

Abstract

The present invention relates to a motor vehicle having a device for automatically operating a gearbox and a torque transmission system, in which a lift gear is advantageously used.

The motor vehicle has a drive motor 1, a gearbox 3 and a torque transmission system 2 (eg clutch). The gearbox can be operated automatically via the actuator 8 and the control unit 7 which can be controlled by the control unit to select and change the gear shift ratio. The control unit 7 is connected to one or more sensors 24 to receive a signal. The actuator 8 comprises a first drive 201 for moving the gearbox component for changing the gear shift ratio and a second drive 202 for moving the gearbox component for selecting the gear shift ratio. The first and second drives 201 operate through gear alignment elements of the gearbox for changing the gear shift ratio and for selecting the gear shift ratio. The spur wheel 206a is mounted to the output of the gear alignment element and engages with the toothed rack 206b. The rack 206b is axially moveable and rotatable on the rotatable shaft 211 and the top of the pinion teeth mate with the bottom of the rack teeth so that the rack is fixed against rotation of the pinion.

Description

Motor with a device for automated gearbox operation

The present invention relates to a motor vehicle having a drive motor, a gearbox and a torque transmission system, and an apparatus for automatically operating the gearbox with a control unit and one or more actuators that can be controlled by the control unit for changing and selecting a gear shift ratio. The control unit may be connected with one or more sensors and other electronic units to receive a signal, and the actuator may be configured to change the gear shift ratio and the first drive for operating the gearbox component to select the gear shift ratio. And a second drive for actuating the gear element.

For example, vehicles with hydraulic actuators and automatic shift transmissions are known. Hydraulic operation of the shift elements inside the gearbox proved to be very complex and costly. Expensive components such as pressure reservoirs and valves are needed for hydraulic actuators.

It is an object of the present invention to provide a motor vehicle having an automatic shift transmission, which reduces the number of components and enhances comfort, such as making it more economical and convenient to shift. It is also an object of the present invention to provide a simple system that can be easily fitted and requires a small construction space. It provides a device that increases operating safety and prevents jamming of individual components.

This object is achieved by a motor vehicle according to the invention having the above-mentioned device, wherein the first drive portion is a gear combination element for changing the gear shift ratio through a first gear combination, such as a worm gear combination having a spur wheel gear on the output. And the second drive operates a gear combination element for selecting the gear shift ratio through the second gear combination, such as a worm gear combination, wherein the spur wheel is mounted at the output of the worm gear and engaged with the tooth rack. All. The rack is also axially moveable and rotatably mounted on the rotatable shaft and the toothed head of the pinion is supported at the bottom of the tooth of the rack so that the rack is fixed against the pinion.

The first drive operates a gearbox element for changing the gear shift ratio through the first gear combination, such as a worm gear combination having a spur wheel gear at the output, and the second drive is a second gear combination, such as a worm gear combination. The gear combination element for selecting the gear shift ratio through the spur wheel is mounted to the output of the worm gear combination and engages with the toothed rack and the rack is axially movable and rotatable on a rotatable shaft. The object is achieved by the idea of the invention and the motor vehicle according to the invention having the above-mentioned device, in which the rack is mounted and the toothed head of the rack is held at the tooth bottom of the pinion so that the rack is fixed against rotation of the pinion.

It is also advantageous if the toothed head support of the rack is provided at the toothed bottom of the pinion and the toothed head support of the pinion is provided at the toothed bottom of the rack.

Supports are provided along the entire width of the rack.

Supports are provided on the toothed edges of the pinion and rack.

The invention will be described in detail with reference to the accompanying drawings:

1 is a schematic view of a motor vehicle;

2 shows an operating device according to the invention;

3 shows a lift gear;

4 is a sectional view of the teeth;

5 is a cross sectional view of a rack;

6 is a cross-sectional view of the pinion and the rack;

7 is a cross-sectional view of the pinion and the rack.

* Sign Description

1 ... drive motor 2 ... torque transmission system

3 ... gearbox 4 ... differential

5 ... output shaft 6 ... wheel

7 ... control unit 8 ... actuator

9 ... separating member 10 ... separating bearing

1 schematically shows a motor vehicle having a drive motor 1, such as an internal combustion engine, a torque transmission system 2 and a gearbox 3 in a drive train. Also shown is a differential device 4, an output shaft 5 and a wheel 6 driven by the output shaft. A speed sensor (not shown) may be mounted to the wheel to sense the speed of the wheel. Functionally, the speed sensor belongs to an electronic unit, for example an anti-lock brake system (ABS). One or more vehicle speeds and gear speeds can be determined from one or more wheel speeds measured by the control unit 7.

The drive unit 1 may be formed as a hybrid drive having an electric motor, a flywheel having a flywheel and an internal combustion engine.

The torque transmission system 2 is formed as a friction clutch, which may for example be made as a torque converter with a magnetic powder clutch, a multiplate clutch or a converter bridge clutch or another clutch. The friction clutch may be formed as an auto-adjusting clutch that compensates for wear.

The device for automatically operating the gearbox 3 consists of a control unit 7 and an actuator 8 which can be controlled by the control unit 7. The control unit 7 controls the actuator 11 for automatically operating the torque transmission system. 1 shows a control unit 7 and an actuator 8, which is shown schematically. The control unit 7 can be formed as an integrated control unit, which controls and regulates the torque transmission system and the gearbox. The motor electronics unit may also be integrated into the control unit. The torque transmission system and the gearbox or the actuators 7, 11 for operating the torque transmission system and the gearbox are controlled by different control units.

Similarly, the torque transmission system, gearbox control unit and engine control unit can be arranged separately and interconnected via data and signal lines.

In addition, the control unit and the electronic unit are connected to the sensor to receive a signal, which sends the operating parameters of the actual operating point to the control unit.

The control unit can accommodate all the necessary information via the data line or data bus.

The control unit 7 is fitted to the computer unit to receive, process, store, retrieve and transmit input signals and system values. The control unit then generates signals and control values for controlling the actuator to transmit and operate to other electronic units.

The torque transmission system 2 is mounted and connected to the flywheel 2a. The flywheel is an integrated flywheel or a split flywheel having a first part and a second part, wherein the torsional braking device is mounted between the first and second parts of the flywheel. The start gear ring 2b is also mounted to the flywheel. The clutch includes a clutch cover 2e and a leaf spring 2f as well as a clutch disc 2c and a pressure plate 2d having friction linings. Self-adjusting clutches have additional means to allow displacement and wear adjustments, which are equipped with sensors such as force or path sensors, which detect conditions that require adjustment due to wear and when such conditions are detected. Will automatically run on.

The torque transmission system is operated by the separating member 9 through the separating bearing 10. The control unit 7 controls the actuator 11 for operating the clutch. The separating member is actuated electro-hydraulic, such as actuated by a pressurized medium, by means of electric, hydraulic or other actuation mechanisms.

The separating member 9 with the separating bearing 10 is formed as a central separating member, which is mounted coaxially with the gear input shaft and the clutch is connected and separated by the biasing of the leaf spring tongue of the clutch. The separating member is formed as a mechanical separating member for actuating and biasing the separating bearing or equivalent element thereof.

The actuator 8 shifts and selects one or more outputs or operating elements or multiple outputs or operating elements. Controlling the shifting and selection operation depends on the type of transmission.

In particular, a transmission having a center shift axis is to be considered. The shifting and selection process is performed through axial manipulation in the circumferential direction of the center shift axis. The actuator, for example, operates the central shift shaft axially with the operating element and the shaft in the circumferential direction with the other operating element. This shifting motion is made in the circumferential direction and the selection operation is made in the axial direction.

In addition, a transmission having two shafts can be considered, one of which is provided for shifting and the other of which is provided for selecting a gear shift ratio. The two shafts are operated in the circumferential direction to perform the shifting and selection process. .

Similarly, a transmission having a shift bar can be considered, which is carried out by selecting a shift bar that is operated and operated in the axial direction to change the shift ratio with the shift process.

The shaft or shift bar represents a shift element inside the gearbox and the shaft moves the shift element within the gearbox when it is in operation. The actuator 8 actuates the shift elements directly or indirectly within the gearbox to change, connect and disconnect gear and transmission ratios, such as central shift axes, shafts or shift bars or other shift elements.

The control unit 7 is connected to the actuator 8 by a signal connection 12 so that the control signal and the sensor signal or the operating state signal are changed and transmitted. In addition, signal connection parts 13 and 14 are provided, through which the control unit exchanges signals with other sensors or electronic units. Other electronic units of this kind are for example engine electronics, anti-locking braking systems or anti-skid regulating devices. Other sensors are sensors that characterize or detect the operating state of the vehicle, such as engine or wheel speed sensors, throttle valve position sensors, accelerator pedal position sensors, and the like. The signal connection unit 15 is connected to a data bus, such as a CAN bus, through which system data of a vehicle or another electronic unit is provided. This is because electronic units are generally connected together by computer units.

The automatic gearbox is shifted or gear shifted to be initiated by the vehicle driver, for example when signaled to switch up and down by a switch, button or other gear selector 40. And a signal is given to select the next gear to be connected. A signal is provided by the electronic shift lever to indicate the gear to be shifted.

In other shift programs, the automatic operation of the gearbox can be selected so that the shifting process takes place automatically where the actual gear is selected and adapted according to the operating parameters. The automatic transmission automatically shifts gears by characteristic values, characteristic lines or characteristic fields based on sensor signals at specific set points without the driver shifting gears.

The neutral position N is also set, in which there is no drive connection between the gear input and the gear output. Parking position P can be selected where a parking lock is made. The parking position will be selected automatically if the ignition key 51 is removed from the ignition lock and the operating state of the vehicle allows this. For example, a method of removing the ignition key at high speed is mentioned, in which case the parking lock is not automatically connected.

The gear selection unit 40 can be set in the manual gear selection area M by the driver, the automatic gear selection area D for driving, the parking lock area P and the neutral position area N. In addition, manual shifting may be achieved, for example, via a switch or a lever.

The vehicle is preferably fitted with an electronic accelerator pedal 23 or a load lever in which the accelerator pedal 23 controls the sensor 24 by which the engine electronics 20 connect the signal line 21 of the engine 1. Control or adjust the fuel supply, ignition timing, injection timing or throttle valve position. The electronic accelerator pedal 23 including the sensor 24 exchanges signals with the engine electronics 20 through the signal line 25. The engine electronics 20 exchanges signals with the control unit 7 via the signal lines 22. In addition, the gear control electronic device 30 is connected to the unit (7, 20) to send and receive signals. Electric throttle valve controls are suitable where the position of the throttle valve is controlled by the engine electronics. There is no need for a direct mechanical connection to the accelerator pedal in this system.

The vehicle includes an engine starting device 50 which controls the engine electronics and the starter to operate and start the engine when attempting to operate the engine by operating the ignition key 51 at the ignition lock.

FIG. 2 shows an operating device according to the invention for automatically operating the gearbox for movement and selective movement of the center shift axis of the gearbox, wherein an electric motor is provided for operation such as moving and rotating the shaft axially. .

The operating device 200 comprises an electric motor 201 which has a worm 203 of a worm gear at its output. This worm 203 engages with the worm gearwheel 205 and the worm gearwheel is connected to a gearwheel 212, such as a pinion, by a shaft. This pinion meshes with the teeth of the gearwheel portion 213. The shift finger 215 is rotatably fixed and axially connected or integrally formed with the gearwheel portion 213. The shift finger 215 engages one of the shift fork spheres 216. By rotating the finger 215 the shift fork is actuated and geared. This is controlled by the operation of the electric motor 202. The motor can be operated in reverse and rotate the finger 215 back and forth. The gear is therefore engaged with the gearbox.

By moving the shift finger 215 along the axis of the center shift shaft 211, the shift finger engages with the shift fork sphere to allow the gear to be connected or the corresponding gear of the shift gate or shift gear is selected. By rotating the shift finger 215 around the axis of the central shift shaft 211 the shift fork moves along the connected shift bar and the transmission is moved.

The shift motor 201 and the selection motor 202 are used and controlled by the control unit to cause the rotation and lifting movement of the shift finger 215 necessary to move the transmission.

The shift motor transmits rotational motion here to the pinion for the shift 212 via a worm gear having a worm and a worm gearwheel having a pretensioned modulus such as an energy accumulator. A pinion shaft 212, such as a worm gearwheel 205, gearwheel portion, is mounted rotatably on the push shaft 214, which is fixed to the housing of the shift motor on one side and the actuator housing (on the other side). 218). The shaft 214 is received and mounted on both sides in the housing of the actuator.

The connection of the elastic drive surface and the worm wheel 205, the torque transmission, and the pinion 212 and the elastic output unit for shifting are made as described above. The rotational movement of the pinion shift 212 is transmitted to the gearwheel portion 213 by the spur wheel gear, where the gearwheel portion 213 and the shift finger 215 are fixed with a key to be connected together or integrally molded. The other shift finger 215a is keyedly connected to the gearwheel portion 213 or the shift finger 215 or integrally molded with the gearwheel portion 213 or the shift finger 215.

The gearwheel portion for actuating the shift 213 and the shift fingers 215, 215a is fixedly connected to the center shift shaft 212, which is guided and pressed from the one or more sliding bearing sockets to the actuator housing 218. do.

The selection motor 202 transmits a rotational movement to the pinion 206a through the worm gear 204 to cause the selection movement. The pinion 206a and the worm wheel for selection are rotatably mounted to the pushing shaft 207, which is fixed to one side of the housing of the selection motor and to the other side of the actuator housing 218. The rack 206b for selection is rotatably mounted on the center shift axis 211 so that the rack 206b does not rotate when the center shift axis 211 rotates about the axis. The teeth of the pinion 206a and the rack 206b are held parallel to each other by the interdigitated teeth that are mutually supported. The axial spacing remains constant over the full width of the tooth interface.

The rack 206b for selection has a plane perpendicular to the axis of rotation of the center shift axis 211. Since the center shift axis 211 has a corresponding opposite surface, the tangential force acting in the pinion teeth is transmitted to the center shift axis 211 through the rack. Rotation of the pinion 206a for selection moves the rack 206b for selection and moves the center shift axis 211 along the axis. The gearwheel portion 213 and pins 215 and 215a can be moved axially and pushed into another shift fork sphere.

Through the limited length rack 206b for selection, an internal stop is provided through structural measurements, such as some spaced tooth space at the edge of the structural part, which limits the area of motion to the extent necessary.

Since the rotation axis of the pinion 206a for selection and the center shift shaft 211 are perpendicular to each other, the pinion 206a for selection in the area in which the lifting and rotating movement of the center shift shaft 211 necessary for moving the transmission takes place. Regardless of the position, rotational movement occurs.

A rack 206b for selection is formed to have a slit 230 along the axis of rotation of the central shift shaft. This slit 230 is turned into a rotating guide so that the rotating guide has a diameter slightly longer than the width of the slit. The center shift shaft 211 has an area whose diameter is drastically reduced and coincides with the rotation guide of the rack 206b for selection. The rotation guide may be formed at the axial edge or at the edge of the rack 206b for selection. The rack for selection is fitted with a slit 230 into the center shift shaft. Positive centered connection, such as a snap-fit connection, through a central shift shaft 211 having a slightly larger size relative to the slit 230. Because of the internal stop described above, the pinion for selection is always engaged with the selection rack 206b and the axial space is ensured through the toothed structure described above, so that it cannot be pressed down by the center shift shaft.

The teeth of the pinion 212 and the teeth of the gearwheel part 213 for movement are made so that the tooth side part may extend in the rotation axis direction. In the lifting and rotating movement regions of the center shift shaft required to move the transmission, the movement of the gearwheel portion and the shift fingers connected to this portion can be made in the axial direction of the center shift shaft regardless of the rotation angle of the gearwheel portion. In addition, the teeth of the pinion 212 and the teeth of the gear wheel portion 213 for shifting are teeth of the other engaging portion where one engagement portion is paired before the tooth side and the wheel edge of the pinion are pressed against each other. Made to stay on the floor This is achieved by the tooth head of special construction. For the full width of the tooth engaging portion, the axial spacing remains constant for the entire displacement area.

When using another kinematic center shift shaft 211, the shifting motion is a sliding motion and the selection motion is a rotational motion, and the principle of the illustrated structure utilizes that the shifting motion becomes a selection motion.

The center shift shaft 211 includes an area with a reduced diameter that is closed by a closure knob at one end.

This area is received by the recess 323 of the rack 206b and is rotatably mounted but cannot move axially. For this purpose the rack 206b has side pieces 235 on both sides of the slit, which prevents the rack 206b from escaping.

According to the present invention, a motor vehicle having a torque transmission system such as a drive motor, a gearbox and a clutch is provided with a device for automatically operating the gearbox, which automatically moves and selects a shift ratio of the control unit and the gearbox. One or more actuators that can be controlled by the control unit. The control unit can be connected to one or more sensors and other electronic units to send and receive signals. The actuator includes a first drive 201 for operating the gearbox element 216 to change the gear shift ratio and a second drive 202 for operating the gearbox element 211 to select the gear shift ratio. The first drive unit 201 operates at the output via first gear combinations, such as spur wheel gears 212 and 213 and worm gear combinations 203 and 205, and the gearbox 216 or elements of the device 211 are gear shift ratios. The second drive unit 202 is operated via a second gear combination, such as the worm gear combinations 204 and 204a, and the elements of the gearbox or device 211 are used to select the gear shift ratio. The fur wheel 206a is mounted to the output of the worm gear combinations 204 and 204a and meshes with the rack 206b so that the rack 206b is rotatably mounted on the shaft 211 which is axially movable and rotatable. Is accepted. It is advantageous if the shaft 211 can be raised and lowered axially by the second drive 202 via the worm gear combinations 204 and 204a and the gear wheels 206a and the rack 206b on the output. The shaft 211 can rotate by means of the first drive 201 through the worm 203 and the worm gearwheel 205 and through the spur wheel gear combinations 212 and 213 on the output. For this purpose the shaft 211 is mounted on at least one side in the housing of the device. The shaft 211 may rotate by the first drive 201 and may move up and down in the axial direction by the second drive 202 and the rack 206b may be fixed axially on the shaft 211 but not rotate. Can be received and cannot rotate about the gearwheel 206a which engages the rack 206b even though the shaft rotates. This is achieved by having the rack and the gearwheel centered on each other by teeth. The rack 206b has an axial bore 323 or slit 230 which can rotate but maintains an area of the shaft 211 having a reduced diameter fixed axially. The shaft 211 includes a region having a reduced diameter, which region keeps the rack 206b rotatable and an end stop connected to the shaft that secures the rack axially. This end stop is advantageously integral with the shaft. In another embodiment, the rack is fixedly connected to the shaft and the key. In another embodiment, the rack is secured to the shaft by screws.

The rack has a recess 323 extending in a central axial direction, such as a bore, and a slit 230 extending in the axial direction, wherein the rack includes side pieces 235 elastic on each side of the slit.

The rack is formed in a cylindrical shape with a cavity in which the slit of the rack is mounted on a wall portion facing the teeth.

The rack 206b and the gearwheel 206a that meshes with the rack are advantageously made of plastic.

3, 4 to 7 are cross-sectional views of the device according to the invention, such as operating devices for operating the gearbox, such as selecting and shifting gears of the gearbox. The device includes a rack lift gear having a rack 301 and a pinion 302 that drives the rack 301. By rotating the pinion 302, the rack 301 moves axially, lifts up and performs a lifting motion. The rack 301 is rotatably mounted on the shift shaft 303. Rotation of the shaft 303 causes gear shifting at the selected shift gate and lowering the shaft 303 selects the shift gate. This rack is rotatably received between shaft 303 and closure knob 304 at a portion of the shaft having a reduced diameter. The rack raising gear combination 300 as the shifting drive and the selection drive of the gear setting device may be used to shift if the operating movement of the shaft 303 for shifting and selecting changes with respect to axial displacement and rotation.

The rack 301 can rotate on the shaft 303 but is mounted axially fixed to the shaft 303 so that the shaft 303 performs a rotational motion regardless of the rack 301 and the lifting movement of the shaft 303 It is operated by the rack.

According to the present invention, the rack 301 does not rotate while the shaft 303 rotates. This is because the toothed head 310 of the pinion 302 is not the tooth of the rack 301 before the side surfaces 312a and 312b of the teeth contact each other and interfere with the movement of the two engaging portions 301 and 302 as shown in FIG. Supported at the bottom 311 is achieved. The axial distance between the rack and pinion is kept constant over the full width of the tooth mating to prevent jamming of the mated side of the tooth. In accordance with the present invention, anti-rotation fixing may be achieved if the toothed head of rack 301 is supported at the toothed bottom of pinion 302 or otherwise supported.

5 is a cross-sectional view of the rack 301, which is formed by a bottom surface 320 that supports the teeth 321. Two arms 322a, 322b form a socket 323 for the area 303a of the shaft 303 that is connected to this bottom surface and has a reduced diameter.

The sides 330a, 330b of the rack 301 protruding outwardly from the tooth bottom than the tooth bottom extends between the sides serve to hold the tooth end 310 of the pinion 302. .

6 and 7 are cross sections of pinion 302 and rack 301. The pinion 302 is rotatably mounted on the shaft or shaft 302a. The pinion 302 is engaged with the teeth 301a of the rack 301 by radially outer teeth 302b. The rack 301 is rotatably received in the region 303a of the shaft 303 having a reduced diameter and is centered through the support between the pinion and the rack.

Patent claims filed herein are described in terms that are not infringed in order to obtain broader patent protection. This application has the rights to the features described thus far in the description and drawings.

Sub-claims refer to different forms in accordance with the subject matter of the main claim through the features of each related sub-claim; It should not be regarded as unable to receive independent protection of the features of the sub-claims mentioned.

The subject matter of the sub-claims forms an independent invention in an independent form from the subject matter of the preceding claims.

The invention is not limited to the embodiments described in the detailed description herein. Various modifications and corrections are possible within the scope of the invention, and in particular, such changes, elements, combinations and materials are contemplated to the combination and modification of the individual features, elements and process steps described in the detailed description and examples and claims and shown in the accompanying drawings. New combinations of the above-mentioned features can lead to new process steps as far as they are newly formed and when it comes to manufacturing, testing and working processes.

Claims (6)

It consists of torque transmission systems such as drive motors, gearboxes and clutches, and automatically moves the gearbox with one or more actuators and control units that can be controlled by the control unit to automatically change and select the gear shift ratio of the gearbox. In this case, the control unit is connected with one or more sensors to receive a signal, and the actuator comprises a first drive for operating the gearbox element to change the gear shift ratio, and a gearbox element for selecting the gear shift ratio. In a motor vehicle having a second drive for operating the first drive, the first drive operates a gearbox element for changing the gear shift ratio via a first gear combination, such as a worm gear combination having a spur wheel gear combination at the output. And the second drive unit selects a gear shift ratio through a second gear combination, such as a worm gear combination. To operate the gearbox element for the selection, the spur wheel is mounted on the output of the worm gear combination and engages the tooth rack, which rack is rotatable on an axially movable and rotatable shaft, the top of the pinion tooth A car characterized in that the rack is engaged with the bottom of the teeth of the rack so that the rack is fixed against rotation of the pinion. It consists of a torque transmission system such as a drive motor, a gearbox and a clutch, which automatically operates the gearbox with one or more actuators and control units which can be controlled by the control unit to automatically change and select the gear shift ratio of the transmission. With the device, the control unit is connected with one or more sensors to receive a signal, and the actuator has a first drive for operating the gearbox element for changing the gear shift ratio and operates a gearbox element for selecting the gear shift ratio. In a motor vehicle having a second drive unit, the first drive unit moves a gearbox element for changing the gear shift ratio through the first gear combination, such as a worm gear combination having a spur wheel gear at the output unit, and the second drive unit. Selects the gear shift ratio via a second gear combination, such as a worm gear combination. The spur wheel is mounted on the output of the worm gear combination and engages the tooth rack, which rack is axially movable and rotatably mounted on the rotatable shaft and the tooth head of the rack A vehicle, which is supported at the toothed bottom so that the rack is fixed against rotation of the pinion. 3. An automobile according to claim 1 or 2, wherein the toothed head support of the rack is provided on the bottom base of the pinion and the toothed head support of the pinion is provided on the toothed bottom of the rack. 4. A motor vehicle according to claim 1, 2 or 3, wherein the support is provided over the entire width of the rack. 4. A motor vehicle according to claim 1, 2 or 3, wherein the support part is provided in the toothed region of the pinion and the rack. A motor vehicle comprising a device for automatically operating a gearbox and a clutch, wherein the motor vehicle is characterized by another structure and method of operation herein.