CN110657231A - A direct-drive gear selection and shifting structure of a passenger car gearbox - Google Patents

Abstract

The invention relates to a direct-drive screw-rod selecting and shifting structure of a passenger car gearbox, comprising a gear-selecting mechanism and a gear-shifting mechanism. Fork; the rotation of the gear selection screw drives the gear selection screw nut to move linearly, the gear selection screw nut is transmitted to the sensor fork, and the gear selection sensor sends out accurate commands to make the gear selection screw The nut slides to the position of the corresponding shift fork shaft to realize gear selection; the shift mechanism includes a shift transition shaft, a shift shift fork and a shift screw nut, and the shift transition shaft is connected to the shift paddle. Fork connection, the shift fork is connected with the shift screw nut; when the shift transition shaft rotates, the shift fork is driven, and the corresponding shift screw nut is moved to a suitable gear to realize the shift. block. Compared with the prior art, the present invention has the advantages of compact structure, reliable transmission, convenient assembly and maintenance, and the like.

Description

A direct-drive gear selection and shifting structure of a passenger car gearbox

technical field

The invention relates to the field of gear selection and shifting structures of gearboxes, in particular to a direct drive selection and shifting structure of a screw rod of a passenger car gearbox.

Background technique

At present, the most commonly used electronically controlled mechanical automatic transmission gear selection and shifting mechanisms on the market are hydraulic and pneumatic. The shifting mechanism is realized by controlling a solenoid valve, which has a complex structure, high manufacturing cost, and relatively low transmission mechanical efficiency.

After searching, Chinese Patent Publication No. CN104565339B discloses an electronically controlled shift and gear selection control device and a vehicle, including: a gear selector switch, which can move between a shifting position and a plurality of gear positions; a shifting drive device a control unit, which is used to drive the transmission shifting device to switch the transmission to the selected gear; and a control unit, which is connected with the shift selector switch and the shift drive device, according to the position of the shift selector switch. The shift drive issues motion commands. After installing the electronically controlled gear shifting and gear selection operating device of the present invention in a vehicle such as a commercial vehicle, the driver can directly control the gear selection and shifting displacement stepping motor of the gearbox through the controller placed in the cab, saving manpower The mechanical control force carried out simply and directly realizes the requirements of variable speed control, improves the driving comfort, improves the labor intensity of the operation, and improves the driving safety. However, in this invention, the gear selection and shifting mechanism is realized by controlling the solenoid valve, which is complicated in structure, high in manufacturing cost and relatively low in transmission mechanical efficiency.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a direct drive selection and shift structure of a screw rod of a passenger car gearbox in order to overcome the above-mentioned defects of the prior art.

The object of the present invention can be realized through the following technical solutions:

A direct-drive screw-rod selection and shifting structure of a passenger car gearbox, comprising a gear-selection mechanism and a gear-shifting mechanism, wherein the gear-selection mechanism comprises a gear-selection screw, a gear-selection screw nut, a gear-selection sensor and a sensor fork, The gear selection screw nut is installed on the gear selection screw, the gear selection screw nut is connected with the sensor fork, the sensor fork is connected with the gear selection sensor, and the gear selection sensor is used for Monitor the angle of gear selection and the correctness of gear selection;

The rotation of the gear selection screw drives the gear selection screw nut to move in a straight line, the gear selection screw nut is transmitted to the sensor fork, and the gear selection sensor sends out accurate commands, so that the gear selection screw nut slides to the The corresponding fork shaft position, so as to achieve gear selection;

The shift mechanism includes a shift transition shaft, a shift fork and a shift screw nut, the shift transition shaft is connected with the shift fork, and the shift fork is connected with the shift screw nut connect;

When the shift transition shaft rotates, the shift fork is driven, and the corresponding shift screw nut is moved to a suitable gear to realize the shift.

Preferably, the gear selection mechanism further includes a gear selection motor, and the gear selection motor is connected with the gear selection screw rod.

Preferably, the shifting mechanism further includes a shifting screw rod, a shifting sensor, a driving dial and a shifting motor, the shifting motor is connected to the shifting transition shaft, and the shifting fork is driven by the shifting fork. The block is connected with the shift transition shaft, and the shift screw rod is connected with the shift screw nut;

The shift sensor is connected with the shift transition shaft, and is used to monitor the rotation angle of the shift transition shaft and to monitor the shift position in real time.

Preferably, the structure further includes a housing, the gear selection screw, the gear selection screw nut, the sensor fork, the shift fork, the shift screw, the shift screw nut, and the shift transition shaft And the drive dial is installed in the casing;

The gear selection motor, the gear shifting motor, the gear selection sensor and the gear shifting sensor are mounted on the casing.

Preferably, the shifting mechanism further includes an interlocking plate, and the interlocking plate realizes the interlocking of the gears during the shifting process, so as to prevent the mechanism from engaging two gears at the same time.

Preferably, the casing is provided with a vent plug for realizing air pressure balance inside and outside the casing.

Preferably, the housing is provided with a lubricating oil lubrication mechanism.

Preferably, the housing includes an O-ring for sealing.

Compared with the prior art, the present invention has the following advantages:

1. High reliability: The screw direct drive mechanism is coupled with the actuator, the control is accurate and reliable, and the positioning accuracy and stability of the entire system are improved.

2. High efficiency: less transmission parts and high transmission efficiency.

3. Low cost: simple structure, good economic performance, convenient assembly and maintenance.

Description of drawings

Fig. 1 is the structural representation of the direct drive selection and shifting structure of the screw rod of the present invention;

FIG. 2 is a cross-sectional view of the direct drive selection and shifting structure of the screw rod of the present invention.

1 is the gear shift motor, 2 is the gear selection sensor, 3 is the sensor fork, 4 is the plane bearing, 5 is the gear selection screw, 6 is the shift transition shaft, 7 is the gear selection screw nut, and 8 is the interlock Plate, 9 is the drive dial, 10 is the shift fork, 11 is the shift screw, 12 is the shift sensor, 13 is the sensor transition plate, 14 is the gear selection motor, 15 is the shift screw nut, and 16 is the Plane bearing, 17 is needle bearing, 18 is ball bearing.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

As shown in Figure 1 and Figure 2, the principle of the present invention: a new type of screw direct drive gear selection and shifting mechanism for passenger cars and truck gearboxes, including a gear selection mechanism and a gear shifting mechanism, and the gear selection mechanism is a lead screw gear selection mechanism , The screw rod is equipped with a nut that moves linearly along the axis of rotation when the screw rod rotates; the gear selection mechanism is a screw nut mechanism. By driving the screw rod to rotate, the nut is driven to move in a straight line, the nut is transmitted to the sensor fork, and the gear selection sensor sends out Accurate instructions make the nut slide to the corresponding fork shaft position to achieve gear selection. The shift mechanism includes a shift transition shaft and a drive dial. When the shift transition shaft rotates, it drives the shift fork, and the corresponding nut is moved to the appropriate gear to achieve gear shifting, and the interlock plate realizes the gear position. Interlock to avoid engaging two gears at the same time.

The present invention is a novel direct-drive screw-screw selection and shifting mechanism of a passenger car gearbox, which mainly includes a gear-shift motor 1, a gear-selection motor 14, a gear-selection sensor 2, a sensor fork 3, a gear-selection screw rod 5, and a gear-selection screw rod Nut 7, interlock plate 8, drive block 9, shift fork 10, shift screw 11, shift sensor 12, shift screw nut 15 form a set of gear selection and shift mechanism, which is driven by a motor. The power system realizes deceleration and torque increase; the gear selection is realized through the gear selection screw 5, the gear selection screw nut 7, the gear selection sensor 2 and the sensor fork 3; the gear shift screw 11, the gear shift screw nut 15, The shift sensor 12 and the shift transition shaft 6 realize the shift mechanism.

The above-mentioned gear selection motor adopts a DC motor.

The above gear selection motor and gear shift motor: the gear selection motor is installed on the housing, the gear selection motor is connected with the gear selection screw, the gear selection screw is equipped with a screw nut, and the gear selection motor is connected with the gear shift transition shaft.

The above-mentioned shift fork: the shift fork is fixed on the shift transition shaft, the sensor shift fork is connected with the gear selection screw nut, and the drive dial is connected with the shift transition shaft.

The above-mentioned shift sensor is used to monitor the rotation angle of the shift transition shaft, and to monitor the shift position in real time, and the gear selection position sensor is used to monitor the angle and correctness of the gear selection.

The above-mentioned interlocking plate realizes interlocking during the shifting process, so as to prevent the mechanism from engaging in two gears at the same time.

The above-mentioned O-ring seal prevents oil leakage, and the vent plug realizes the air pressure balance inside and outside the casing.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the art can easily think of various equivalents within the technical scope disclosed by the present invention. Modifications or substitutions should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (8)

1. A screw rod direct-drive gear selecting and shifting structure of a passenger car gearbox comprises a gear selecting mechanism and a gear shifting mechanism, and is characterized in that the gear selecting mechanism comprises a gear selecting screw rod (5), a gear selecting screw nut (7), a gear selecting sensor (2) and a sensor shifting fork (3), the gear selecting screw nut (7) is installed on the gear selecting screw rod (5), the gear selecting screw nut (7) is connected with the sensor shifting fork (3), the sensor shifting fork (3) is connected with the gear selecting sensor (2), and the gear selecting sensor (2) is used for monitoring the angle during gear selection and the correctness of gear selection;

the gear selecting screw rod (5) rotates to drive the gear selecting screw rod nut (7) to move linearly, the gear selecting screw rod nut (7) transmits to the sensor shifting fork (3), and the gear selecting sensor (2) sends out an accurate instruction to enable the gear selecting screw rod nut (7) to slide to the corresponding shifting fork shaft position, so that gear selection is realized;

the gear shifting mechanism comprises a gear shifting transition shaft (6), a gear shifting fork (10) and a gear shifting lead screw nut (15), the gear shifting transition shaft (6) is connected with the gear shifting fork (10), and the gear shifting fork (10) is connected with the gear shifting lead screw nut (15);

when the transition shaft (6) of shifting gears rotates to drive the shift fork (10) of shifting gears, stir corresponding lead screw nut (15) of shifting gears and move to suitable gear, realize shifting gears.

2. The screw rod direct-drive gear selecting and shifting structure of the passenger car gearbox as claimed in claim 1, wherein the gear selecting mechanism further comprises a gear selecting motor (14), and the gear selecting motor (14) is connected with the gear selecting screw rod (5).

3. The screw rod direct-drive gear selecting and shifting structure of the passenger car gearbox is characterized by further comprising a gear shifting screw rod (11), a gear shifting sensor (12), a driving shifting block (9) and a gear shifting motor (1), wherein the gear shifting motor (1) is connected with a gear shifting transition shaft (6), the gear shifting fork (10) is connected with the gear shifting transition shaft (6) through the driving shifting block (9), and the gear shifting screw rod (11) is connected with a gear shifting screw rod nut (15);

the gear shifting sensor (12) is connected with the gear shifting transition shaft (6) and used for monitoring the rotating angle of the gear shifting transition shaft (6) and monitoring the gear shifting position in real time.

4. The screw rod direct-drive gear selecting and shifting structure of the passenger car gearbox as claimed in claim 2 or 3, wherein the structure further comprises a shell, and the gear selecting screw rod (5), the gear selecting screw nut (7), the sensor shifting fork (3), the gear shifting fork (10), the gear shifting screw rod (11), the gear shifting screw nut (15), the gear shifting transition shaft (6) and the driving shifting block (9) are arranged in the shell;

the gear selecting motor (14), the gear shifting motor (1), the gear selecting sensor (2) and the gear shifting sensor (12) are arranged on the shell.

5. The screw rod direct-drive gear selecting and shifting structure of the passenger car gearbox as claimed in claim 3, wherein the gear shifting mechanism further comprises an interlocking plate (8), and the interlocking plate (8) realizes gear interlocking in the gear shifting process to avoid the mechanism from being simultaneously engaged into two gears.

6. The screw rod direct-drive gear selecting and shifting structure of the passenger car gearbox as claimed in any one of claims 4, wherein a vent plug for realizing air pressure balance between the inside and the outside of the shell is arranged on the shell.

7. The screw rod direct-drive gear selecting and shifting structure of the passenger car gearbox as claimed in any one of claims 4, wherein a lubricating oil lubricating mechanism is arranged in the shell.

8. The screw rod direct-drive gear selecting and shifting structure of the passenger car gearbox as claimed in any one of claims 4, wherein the housing comprises an O-ring for sealing.

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