阅读说明：本技术 一种选换挡执行机构 (gear selecting and shifting actuating mechanism ) 是由 马渊 严鉴铂 刘义 李澎 孙建明 于 2019-09-20 设计创作，主要内容包括：本发明涉及一种选换挡执行机构,解决现有选换挡装置空间尺寸较大、成本较高的问题。该选换挡执行机构包括伺服电机、选换挡驱动杆、选挡连杆、换挡丝杠、螺母、换挡连杆和选挡拨头；伺服电机的输出轴与选换挡驱动杆连接,驱动其转动；选换挡驱动杆与选挡连杆、换挡丝杠连接,驱动选挡连杆或换挡丝杠转动；选挡连杆与选挡拨头连接,带动选挡拨头在选挡平面内转动实现选挡动作；螺母与换挡丝杠配合,由换挡丝杠的转动实现螺母的轴向运动,换挡连杆分别与螺母、选挡拨头固定连接,螺母带动换挡连杆轴向运动,换挡连杆带动选挡拨头轴向运动,从而实现挂挡动作。(the invention relates to a gear selecting and shifting actuating mechanism, which solves the problems of larger space size and higher cost of the existing gear selecting and shifting device. The gear selecting and shifting actuating mechanism comprises a servo motor, a gear selecting and shifting driving rod, a gear selecting connecting rod, a gear shifting lead screw, a nut, a gear shifting connecting rod and a gear selecting shifting head; an output shaft of the servo motor is connected with the gear selecting and shifting driving rod to drive the gear selecting and shifting driving rod to rotate; the gear selecting and shifting driving rod is connected with the gear selecting connecting rod and the gear shifting lead screw and drives the gear selecting connecting rod or the gear shifting lead screw to rotate; the gear selecting connecting rod is connected with the gear selecting shifting block to drive the gear selecting shifting block to rotate in a gear selecting plane to realize a gear selecting action; the nut is matched with the gear shifting lead screw, the axial movement of the nut is realized by the rotation of the gear shifting lead screw, the gear shifting connecting rod is respectively and fixedly connected with the nut and the gear selecting shifting block, the nut drives the gear shifting connecting rod to move axially, and the gear shifting connecting rod drives the gear selecting shifting block to move axially, so that the gear engaging action is realized.)

1. A gear selecting and shifting actuating mechanism is characterized in that: comprises a servo motor (19), a gear selecting and shifting driving rod (2), a gear selecting connecting rod (6), a gear shifting lead screw (16), a nut (11), a gear shifting connecting rod (10) and a gear selecting shifting block (9);

An output shaft of the servo motor (19) is connected with the gear selecting and shifting driving rod (2) to drive the gear selecting and shifting driving rod to rotate;

The gear selecting and shifting driving rod (2) is connected with the gear selecting connecting rod (6) and the gear shifting lead screw (16) and drives the gear selecting connecting rod (6) or the gear shifting lead screw (16) to rotate;

The gear selecting connecting rod (6) is connected with the gear selecting shifting head (9) to drive the gear selecting shifting head (9) to rotate in a gear selecting plane to realize gear selecting action;

Nut (11) and the cooperation of lead screw (16) of shifting, realize the axial motion of nut (11) by the rotation of the lead screw (16) of shifting, shift connecting rod (10) respectively with nut (11), select to keep off shifting block (9) fixed connection, nut (11) drive shift connecting rod (10) axial motion, shift connecting rod (10) drive select to keep off shifting block (9) axial motion to realize the action of putting into gear.

2. The gear selection and shift actuator of claim 1, wherein: the gear selecting and shifting driving rod (2) comprises an input rod (21), a gear selecting rod (22) and a gear shifting rod (23) which are fixedly connected;

The input rod (21) is connected with an output shaft of the servo motor (19);

A gear selecting inner spline sleeve (3) is arranged at one end of the gear selecting rod (22), a gear selecting outer spline (24) is arranged at one end of the gear selecting connecting rod (6), and the gear selecting rod (22) and the gear selecting connecting rod (6) are connected through the gear selecting inner spline sleeve (3) and the gear selecting outer spline (24);

One end of the gear shifting rod (23) is provided with a gear shifting internal spline sleeve (18), one end of the gear shifting lead screw (16) is provided with a gear shifting external spline (25), and the gear shifting rod (23) is connected with the gear shifting lead screw (16) through the gear shifting internal spline sleeve (18) and the gear shifting external spline (25).

3. the gear selection and shift actuator of claim 2, wherein: the gear selecting and shifting device is characterized by further comprising a gear selecting spring (1) and a gear selecting electromagnet (5), wherein the gear selecting electromagnet (5) is arranged on a gear selecting connecting rod (6) and used for providing magnetic force to enable a gear selecting inner spline sleeve (3) to be sleeved on a gear selecting outer spline (24) to achieve connection of the gear selecting inner spline sleeve (3) and the gear selecting outer spline (24), one end of the gear selecting spring (1) is fixed on a shaft shoulder of a gear selecting rod (22), the other end of the gear selecting spring is connected with the gear selecting inner spline sleeve (3), and the gear selecting inner spline sleeve (3) is reset by restoring force of the gear selecting spring (1).

4. The gear selection and shift actuator of claim 3, wherein: the gear shifting device is characterized by further comprising a gear shifting spring (20) and a gear shifting electromagnet (17), wherein the gear shifting electromagnet (17) is arranged on the gear shifting lead screw (16) and used for providing magnetic force to enable the gear shifting inner spline sleeve (18) to be sleeved on the gear shifting outer spline (25) so as to achieve connection of the gear shifting inner spline sleeve (18) and the gear shifting outer spline (25); one end of the gear shifting spring (20) is fixed on a shaft shoulder of the gear shifting rod (23), the other end of the gear shifting spring is connected with the gear shifting inner spline sleeve (18), and the gear shifting inner spline sleeve (18) is reset by utilizing the restoring force of the gear shifting spring (20).

5. The gear selection and shift actuator of claim 4, wherein: the gear selecting electromagnet (5) and the gear shifting electromagnet (17) are respectively arranged on the gear selecting connecting rod (6) and the gear shifting lead screw (16) through clamp springs (4).

6. the gear selection and shift actuator according to any one of claims 1 to 5, characterized in that: and an angle sensor (8) is arranged on the gear selecting connecting rod (6).

7. The gear selection and shift actuator of claim 6, wherein: and a displacement sensor (7) is arranged on the gear selecting shifting head (9).

8. The gear selection and shift actuator of claim 7, wherein: still include guide bar (14) and direction connecting rod (15), the one end and nut (11) fixed connection of direction connecting rod (15), the other end is provided with the guiding hole, the guiding hole is passed to the one end of direction connecting rod (15), and the other end setting can be at mounting base (13) internal rotation on mounting base (13).

9. The gear selection and shift actuator of claim 8, wherein: and the gear selecting connecting rod (6) is provided with a clamp spring (4) for limiting the gear selecting shifting head (9).

10. The gear selection and shift actuator of claim 9, wherein: and the axial movement of the two ends of the gear shifting lead screw (16) is limited by a pair of ball bearings (12) arranged on a mounting base (13).

Technical Field

The invention relates to an automatic transmission of an automobile, in particular to a gear selecting and shifting actuating mechanism.

Background

With the continuous progress of the technical level of the Automated Manual Transmission (AMT), the market popularity and user acceptance of the AMT have been further improved in recent years. In the AMT system, a gear selecting and shifting actuator is one of the most important components, and receives a command from a transmission electronic control unit (TCU) to complete a corresponding gear shifting action. Therefore, the control precision, the response speed, the feedback condition and the like of the actuating mechanism directly determine the gear shifting quality of the AMT, and further influence the performance of the whole vehicle.

The gear selecting and shifting actuating mechanism of the mainstream AMT in the market at present can be divided into three forms of electric control hydraulic drive, electric control pneumatic drive and electric control electric drive according to the driving form of the actuating mechanism. Compared with other two forms, the electric control electric form gear selecting and shifting actuating mechanism has the advantages of simple structure, no need of an air source or a hydraulic oil source, strong environment adaptability and the like, and is widely used. However, the traditional electric control electric actuating mechanism adopts two sets of motors to respectively perform gear selecting and shifting actions, the structure not only enables the space size of the whole gear selecting and shifting device to be larger, but also enables the cost of the whole device to be increased, and the actuating mechanism cannot be normally used for the application working conditions that the space size of a transmission is limited and the cost requirement is strict.

disclosure of Invention

The invention aims to solve the problems of large space size and high cost of the existing gear selecting and shifting device and provides a gear selecting and shifting actuating mechanism.

The technical scheme of the invention is as follows:

A gear selecting and shifting actuating mechanism comprises a servo motor, a gear selecting and shifting driving rod, a gear selecting connecting rod, a gear shifting lead screw, a nut, a gear shifting connecting rod and a gear selecting shifting block; an output shaft of the servo motor is connected with the gear selecting and shifting driving rod to drive the gear selecting and shifting driving rod to rotate; the gear selecting and shifting driving rod is connected with the gear selecting connecting rod and the gear shifting lead screw and drives the gear selecting connecting rod or the gear shifting lead screw to rotate; the gear selecting connecting rod is connected with the gear selecting shifting block to drive the gear selecting shifting block to rotate in a gear selecting plane to realize a gear selecting action; the nut is matched with the gear shifting lead screw, the axial movement of the nut is realized by the rotation of the gear shifting lead screw, the gear shifting connecting rod is respectively and fixedly connected with the nut and the gear selecting shifting block, the nut drives the gear shifting connecting rod to move axially, and the gear shifting connecting rod drives the gear selecting shifting block to move axially, so that the gear engaging action is realized.

further, the gear selecting and shifting driving rod comprises an input rod, a gear selecting rod and a gear shifting rod which are fixedly connected; the input rod is connected with an output shaft of the servo motor; a gear selecting inner spline sleeve is arranged at one end of the gear selecting rod, a gear selecting outer spline is arranged at one end of the gear selecting connecting rod, and the gear selecting rod and the gear selecting connecting rod are connected through the gear selecting inner spline sleeve and the gear selecting outer spline; one end of the gear shifting rod is provided with a gear shifting internal spline sleeve, one end of the gear shifting lead screw is provided with a gear shifting external spline, and the gear shifting rod is connected with the gear shifting lead screw through the gear shifting internal spline sleeve and the gear shifting external spline.

The gear selecting connecting rod is used for providing magnetic force to enable the gear selecting inner spline sleeve to be sleeved on the gear selecting outer spline, connection of the gear selecting inner spline sleeve and the gear selecting outer spline is achieved, one end of the gear selecting spring is fixed on a shaft shoulder of the gear selecting rod, the other end of the gear selecting spring is connected with the gear selecting inner spline sleeve, and the gear selecting inner spline sleeve is far away from the gear selecting electromagnet through restoring force of the gear selecting spring, so that reset is achieved.

The gear shifting device comprises a gear shifting screw rod, a gear shifting inner spline sleeve and a gear shifting outer spline, and is characterized by further comprising a gear shifting spring and a gear shifting electromagnet, wherein the gear shifting electromagnet is arranged on the gear shifting screw rod and used for providing magnetic force to sleeve the gear shifting inner spline sleeve on the gear shifting outer spline so as to realize the connection of the gear shifting inner spline sleeve and the gear shifting outer spline; one end of the gear shifting spring is fixed on a shaft shoulder of the gear shifting rod, the other end of the gear shifting spring is connected with the gear shifting internal spline sleeve, and the gear shifting internal spline sleeve is far away from the gear shifting electromagnet by utilizing the restoring force of the gear shifting spring, so that the reset is realized.

Furthermore, the gear selecting electromagnet and the gear shifting electromagnet are respectively arranged on the gear selecting connecting rod and the gear shifting lead screw through snap springs.

Furthermore, an angle sensor is arranged on the gear selecting connecting rod.

Furthermore, a displacement sensor is arranged on the gear selecting shifting block.

Further, still include guide bar and direction connecting rod, the one end and the nut fixed connection of direction connecting rod, the other end is provided with the guiding hole, the guiding connection hole is passed to the one end of direction connecting rod, and the other end setting can be at the installation base internal rotation on the installation base.

Furthermore, a clamp spring used for limiting the gear selecting shifting head is arranged on the gear selecting connecting rod.

Further, the axial movement of the shift screw is limited by a pair of ball bearings mounted on the mounting base at two ends of the shift screw.

compared with the prior art, the invention has the following beneficial effects:

Compared with the traditional electric control electric gear selecting and shifting actuating mechanism, the gear selecting and shifting actuating mechanism can realize gear selecting and shifting actions of the actuating mechanism by using only one motor, has the characteristics of simple structure, lower cost, low failure rate and the like, has the advantages of high transmission efficiency, stable transmission and the like of a ball screw nut pair, has good transportability, and can be widely applied to AMT.

Drawings

FIG. 1 is a schematic structural view of a gear selecting and shifting actuator according to the present invention;

Fig. 2 is a gear selection schematic diagram of the gear selection and shift actuating mechanism of the invention.

Reference numerals: 1-gear selection spring, 2-gear selection and shift driving rod, 3-gear selection internal spline sleeve, 4-snap spring, 5-gear selection electromagnet, 6-gear selection connecting rod, 7-displacement sensor, 8-angle sensor, 9-gear selection shifting head, 10-gear shifting connecting rod, 11-nut, 12-ball bearing, 13-mounting base, 14-guide rod, 15-guide connecting rod, 16-gear shifting lead screw, 17-gear shifting electromagnet, 18-gear shifting internal spline sleeve, 19-servo motor, 20-gear shifting spring, 21-input rod, 22-gear selection rod, 23-gear shifting rod, 24-gear selection external spline and 25-gear shifting external spline.

Detailed Description

The invention is described in further detail below with reference to the figures and specific embodiments.

The invention provides an electric control electric gear selecting and shifting actuating mechanism, which drives a gear selecting and shifting driving rod through a servo motor, finally completes gear selecting and shifting actions through a series of transmissions.

as shown in fig. 1 and fig. 2, the gear selecting and shifting actuating mechanism of the present invention includes a servo motor 19, a gear selecting and shifting driving rod 2, a gear selecting link rod 6, a gear shifting lead screw 16, a nut 11, a gear shifting link rod 10, a gear selecting dial 9, a guide rod 14, a guide link rod 15, a gear selecting spring 1, a gear selecting electromagnet 5, a gear shifting spring 20, and a gear shifting electromagnet 17.

An output shaft of the servo motor 19 is connected with the gear selecting and shifting driving rod 2 to drive the gear selecting and shifting driving rod to rotate; the gear selecting and shifting driving rod 2 is connected with the gear selecting connecting rod 6 and the gear shifting lead screw 16 and drives the gear selecting connecting rod 6 or the gear shifting lead screw 16 to rotate; the gear selecting connecting rod 6 is connected with the gear selecting shifting block 9 to drive the gear selecting shifting block 9 to rotate in a gear selecting plane to realize a gear selecting action; the gear shifting lead screw 16 is matched with the nut 11, the nut 11 moves axially due to the rotation of the gear shifting lead screw 16, the gear shifting connecting rod 10 is in threaded connection with the nut 11, the nut 11 drives the gear shifting connecting rod to move axially, and then the gear shifting connecting rod 10 drives the gear selecting shifting head 9 to move axially, so that the gear engaging action is achieved. An inner hole of the gear selecting shifting head 9 is sleeved on the gear selecting connecting rod, the head of the gear shifting connecting rod 10 is sleeved on the outer cylindrical surface of the gear selecting shifting head 9, the two parts are in clearance fit, and a clamp spring 4 used for limiting the gear selecting shifting head 9 is arranged on the gear selecting connecting rod 6.

Ball bearings 12 are mounted at two ends of the gear shifting lead screw 16 and are in interference fit with inner rings of the ball bearings 12, the ball bearings 12 are mounted in the mounting base 13, and axial limiting is achieved through a step hole of the gear shifting lead screw 16, so that axial movement of the lead screw is limited. Meanwhile, in order to realize the stable axial movement of the nut 11, the nut fixing device is provided with the guide rod 14 and the guide connecting rod 15, one end of the guide connecting rod 15 is in threaded connection with the nut 11, the other end of the guide connecting rod 15 is provided with a guide hole, one end of the guide connecting rod 15 penetrates through the guide hole of the guide connecting rod 15, and the other end of the guide connecting rod 15 is arranged on the mounting base 13 and can rotate in the mounting base 13.

the gear selecting and shifting driving rod 2 comprises an input rod 21, a gear selecting rod 22 and a gear shifting rod 23 which are fixedly connected; the input rod 21 is connected with an output shaft of the servo motor 19; one end of the gear selecting rod 22 is provided with a gear selecting inner spline housing 3, one end of the gear selecting connecting rod 6 is provided with a gear selecting outer spline 24, and the gear selecting rod 22 and the gear selecting connecting rod 6 are connected through the gear selecting inner spline housing 3 and the gear selecting outer spline 24; one end of the gear shift rod 23 is provided with a gear shift internal spline sleeve 18, one end of the gear shift lead screw 16 is provided with a gear shift external spline 25, and the gear shift rod 23 and the gear shift lead screw 16 are connected through the gear shift internal spline sleeve 18 and the gear shift external spline 25.

The gear selecting electromagnet 5 is arranged on the gear selecting connecting rod 6 through the clamp spring 4 and used for providing magnetic force to enable the gear selecting inner spline sleeve 3 to be sleeved on the gear selecting outer spline 24 to achieve connection of the gear selecting inner spline sleeve 3 and the gear selecting outer spline 24, one end of the gear selecting spring 1 is fixed on a shaft shoulder of the gear selecting rod 22, the other end of the gear selecting spring is connected with the gear selecting inner spline sleeve 3, and the gear selecting inner spline sleeve 3 is far away from the gear selecting electromagnet 5 through restoring force of the gear selecting spring 1 to achieve resetting. After the gear selecting and shifting driving rod 2 and the gear selecting connecting rod 6 are electrified through the gear selecting electromagnet 5, the gear selecting inner spline sleeve 3 is attracted to move upwards, and therefore connection of the gear selecting and shifting driving rod and the gear selecting connecting rod is achieved. The shaft shoulder of the gear selecting rod 22 is provided with a gear selecting spring 1, so that after the gear selecting electromagnet 5 is powered off, the gear selecting internal spline housing 3 moves downwards to realize the reset of the gear selecting and shifting driving rod 2.

The gear shifting electromagnet 17 is arranged on the gear shifting lead screw 16 through the clamp spring 4 and is used for providing magnetic force to sleeve the gear shifting inner spline housing 18 on the gear shifting outer spline 25 so as to realize the connection of the gear shifting inner spline housing 18 and the gear shifting outer spline 25; one end of the shift spring 20 is fixed on a shaft shoulder of the shift lever 23, the other end is connected with the shift inner spline housing 18, and the shift inner spline housing 18 is far away from the shift electromagnet 17 by utilizing the restoring force of the shift spring 20. After the gear selecting and shifting driving rod 2 and the gear shifting lead screw 16 are electrified through the gear shifting electromagnet 17, the inner spline sleeve 18 of the attraction gear moves rightwards, and connection of the gear selecting and shifting driving rod and the gear shifting lead screw is achieved. The shaft shoulder of the gear shifting driving rod is provided with a gear shifting spring 20, so that the gear shifting inner spline sleeve 18 moves leftwards after the gear shifting electromagnet 17 is powered off, and the reset of the gear shifting driving rod 2 is realized.

The invention provides an electric control electric gear selecting and shifting actuating mechanism, wherein a servo motor 19 drives a gear selecting and shifting driving rod 2 to rotate. In the aspect of gear selection, an electromagnet is arranged, and the magnetic force generated after the electromagnet is electrified attracts the gear selection inner spline sleeve 3 to move towards the gear selection inner spline sleeve, so that the gear selection and shifting driving rod 2 drives the gear selection connecting rod 6 to rotate. The rotation angle of the servo motor 19 is controlled to realize that the gear selection connecting rod 6 rotates for a fixed angle in a gear selection plane, and the gear selection action is finished. The gear selecting connecting rod 6 is provided with a corresponding angle sensor 8, and the position of the gear selecting connecting rod 6 can be known in real time through the converted electric signal. After the electromagnet is powered off, the gear selecting inner spline housing 3 is far away from the electromagnet by utilizing the restoring force generated by the spring arranged on the shaft shoulder of the gear selecting and shifting driving rod 2. When the electromagnet is electrified again, the internal spline sleeve can move towards the direction of the electromagnet, and the gear selecting action is realized again.

In the aspect of gear shifting, the electromagnet is also powered on, so that the inner spline sleeve axially moves towards the electromagnet, and the gear selecting driving rod rotates to drive the gear shifting screw rod 16 to rotate. Further, the gear shifting screw 16 rotates to drive the nut 11 to move axially, and simultaneously the gear shifting rod 23 drives the gear selecting shifting head 9 to move axially, so that the gear shifting action is completed. Two ends of the gear shifting screw rod 16 are designed with corresponding shaft shoulder structures, and the axial movement of the screw rod is limited by two ball bearings 12 on the mounting base 13. And a corresponding position sensor is arranged at the tail end of the gear selecting shifting head 9, and the position of the gear selecting shifting head 9 is fed back in real time through the converted electric signal. In order to limit the rotation of the nut 11, a corresponding guide connecting rod 15 and a corresponding guide rod 14 are designed. Similarly, after the gear shifting action is completed, the gear shifting electromagnet 17 is powered off, and the gear shifting internal spline sleeve 18 is far away from the electromagnet by virtue of restoring force generated by a spring arranged on the shaft shoulder of the gear shifting driving rod 2, so that the power interruption between the driving motor and the gear shifting lead screw 16 is realized.

The gear selecting and shifting actuating mechanism of the invention has the working process as follows: when the gear selecting and shifting actuating mechanism receives a gear shifting action command sent by the TCU, the servo motor 19 drives the gear selecting and shifting driving rod 2 to rotate by a certain gear selecting required angle phi, the gear selecting electromagnet 5 is electrified to generate magnetic force to attract the gear selecting inner spline sleeve 3 to move towards the gear selecting and shifting actuating mechanism, and thus the gear selecting connecting rod 6 can drive the gear selecting shifting head 9 to rotate phi in a gear selecting plane (shown in figure 2). Subsequently, the gear selecting electromagnet 5 is powered off, and the gear selecting inner spline housing 3 is separated from the gear selecting electromagnet 5 under the restoring force action of the gear selecting spring 1. In the process, the angle sensor 8 can monitor the rotation angle of the gear selecting rod 22 in real time, the signal is converted into an electric signal and then fed back to the TCU, and whether the servo motor 19 continues to rotate or not is judged through calculation and analysis until the gear selecting shifting block 9 moves to a proper position required by the gear shifting action, and the gear selecting action is completed.

When a gear shifting action is required, the servo motor 19 drives the gear selecting and shifting driving rod 2 to rotate, at the moment, the gear shifting electromagnet 17 is electrified to generate magnetic force, and the gear shifting inner spline sleeve 18 is attracted to move rightwards. Further, the shift screw 16 rotates to drive the nut 11 to move axially, and the shift rod 23 drives the shift knob 9 to move axially. The guide link 15 connects the nut 11 and the guide bar 14, thus limiting the rotation of the nut 11 about the screw. The axial movement of the screw is limited by two ball bearings 12 mounted on the base. In the process, the position sensor can monitor the position of the gear selecting shifting block 9 in real time, the position signal is converted into an electric signal and then fed back to the TCU, and whether the servo motor 19 needs to rotate continuously is judged through calculation and analysis until the gear selecting action is finished. Finally, after the gear shifting action is finished, the gear shifting electromagnet 17 is powered off, the gear shifting internal spline sleeve 18 moves leftwards under the restoring force of the gear selecting spring 1, and the power interruption between the gear selecting and shifting driving rod 2 and the screw rod is realized.