JP2006010009A - Motor driven transmission operating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor driven transmission operating device 1 having high output without increasing the sizes of motors. <P>SOLUTION: A striker 6 is put in spline engagement with a shift shaft 4 supported rotatably in a housing 2 and it is integrally rotated in an axially movable manner. A select ball screw 22 is arranged parallel to the shift shaft and it is driven by two motors 14, 16 connected to both ends. When a select ball nut 32 threaded to the ball screw is moved in the axial direction, the striker is moved via first and second select bars 36, 40 in the axial direction and a transmission performs select operation. A shift ball screw 54 arranged perpendicular to the shift shaft is driven by two motors 50, 52. The movement of a shift ball nut 56 is transmitted to the shift shaft via a shift lever 58 to rotate the striker for shift operation. Thus, high output is achieved with the small motors. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a transmission operation device, and more particularly to a motor-driven transmission operation device that performs a selection operation and a shift operation of a transmission by moving or rotating a striker by driving a motor.

  The motor-driven transmission operating device includes a shift shaft that is rotatably supported in a housing, a striker that is fitted to the outer periphery of the shift shaft, a select motor that moves the striker in the axial direction of the shift shaft, A shift motor that rotates the striker about the axis of the shift shaft is provided, and the selection operation and the shift operation of the transmission are performed by controlling the drive of the selection motor and the shift motor.

  An example of such a motor-driven transmission operating device (see, for example, Patent Document 1) will be briefly described with reference to FIG. The reference numerals in FIG. 7 are shown in parentheses in this specification. In this transmission operating device (1), a shift shaft (4) is supported in a housing (2) so as to be rotatable and restricted in movement in the axial direction. A spline (4b) is formed on the outer peripheral surface of the shift shaft (4), and the striker (6) is engaged by a spline (6a) formed on the inner surface of the shift shaft (4). It is possible to move in the axial direction, and when the shift shaft (4) rotates, it rotates integrally.

  A select motor (16) is fixed to the housing (2), and a screw shaft (20) arranged in parallel with the shift shaft (4) is connected to the motor shaft (18) of the select motor (16) for rotation. The A nut (26) is screwed onto the screw shaft (20) and is connected to the striker (6) so as to move integrally in the axial direction. The screw shaft (20) is driven by the drive of the select motor (16). When rotating, the nut (26) moves in the axial direction, and the striker (6) moves integrally in the axial direction to perform the select operation.

Further, a screw shaft (52) arranged orthogonal to the shift shaft (4) is rotated by a shift motor (46), and a nut (54) screwed to the screw shaft (52). Is connected to the shift shaft (4) via a lever (56). When the screw shaft (52) is rotated by driving the shift motor (46), the nut (54) is moved in the axial direction of the screw shaft (52), and the shift shaft (4) is rotated via the lever (56). Thus, the striker (6) is rotated to perform the shift operation.
Japanese Patent Application No. 2003-345843 (page 2-5, FIG. 1)

  The conventional motor-driven transmission operating device has only one select motor and one shift motor, and a large motor is required to be mounted on a large vehicle so that gears can be switched with a large output. Therefore, there is a problem that the entire transmission operating device is enlarged.

  The present invention relates to a shift shaft that is rotatably supported in a housing, a striker that is axially movable on the shift shaft and fitted to rotate integrally, and a select motor that moves the striker in the axial direction. And a transmission means for transmitting the driving force of the select motor to the striker, a shift motor for rotating the shift shaft, and a transmission means for transmitting the driving force of the shift motor to the shift shaft. In the transmission operation device, two select motors and shift motors are provided, respectively, and the driving force is always obtained by the two motors during the select operation and the shift operation.

  In the motor-driven transmission operating device of the present invention, since two motors are always driven, a large output can be obtained without increasing the size of the motor, and an increase in the size of the entire transmission operating device can be avoided. it can. Further, even when one motor fails, a speed change operation is possible, and safety can be ensured.

  There are two select motors that perform the select operation and two shift motors that perform the shift operation, and these two motors are driven simultaneously to perform the select operation or the shift operation without increasing the size of the motor. The purpose of obtaining the high output required for a large vehicle is achieved.

  Hereinafter, the present invention will be described with reference to embodiments shown in the drawings. 1 is a plan view of a motor-driven transmission operating device according to an embodiment of the present invention, FIG. 2 is a view taken in the direction of arrow II in FIG. 1, and FIG. 3 is a cross-sectional view taken along line III-III in FIG. 4 is a sectional view taken along line IV-IV in FIG. 2, FIG. 5 is a sectional view taken along line V-V in FIG. 1, and FIG. 6 is a perspective view showing each part constituting the transmission operating device. The illustration is omitted.

  In this motor-driven transmission operating device (indicated by reference numeral 1 as a whole), a shift shaft 4 is rotatably supported in a housing 2, and a striker 6 (see FIGS. 3 to 6) is provided on the outer periphery of the shift shaft 4. ) Are fitted so as to be movable in the axial direction. As will be described later, the selection operation of the transmission (not shown) is performed by moving the striker 6 in the axial direction of the shift shaft 4, and the shift operation of the transmission is performed by rotating the striker 6. It has become.

  A shift shaft holding hole 8 is formed in the housing 2 (see FIGS. 3 and 4), and the shift shaft 4 is rotatably held in the holding hole 8. A space 12 surrounding the shift shaft 4 is formed near the center of the shift shaft holding hole 8 (see FIGS. 3 to 5), and the striker is disposed on the outer periphery of a portion of the shift shaft 4 located in the space 12. 6 is fitted. An axial spline 4 a is formed on the outer peripheral surface of the portion of the shift shaft 4 located in the space 12, while an axial spline 6 a (see FIG. 5) is also formed on the inner peripheral surface of the striker 6. The striker 6 is movable in the axial direction of the shift shaft 4 and is rotated integrally with the shift shaft 4 in the rotation direction.

  A pair of select motors (a first select motor 14 and a second select motor 16) are attached to the side of the housing 2 (upper part of FIGS. 1 and 4). These two select motors 14 and 16 are arranged so that their motor shafts 18 and 20 (see FIG. 4) face each other, and a single screw shaft (at the tip of these motor shafts 18 and 20). In this embodiment, both ends of the select ball screw 22) are connected. This select ball screw 22 is arranged in parallel with the shift shaft 4. When the two select motors 16 and 18 are normally driven, they rotate in the same direction at the same speed. For example, when the first select motor 14 rotates in the clockwise direction when viewed from behind (the right side of each figure), the second select motor 16 rotates in the counterclockwise direction when viewed from the back (left side of each figure). To do. By rotating in this way, one ball screw 22 is driven from both sides.

  The motor shafts 18 and 20 of both the select motors 14 and 16 are connected to both end portions of the select ball screw 22 via rotation transmitting members 24 and 26, respectively. This connection structure will be described with reference to FIG. A connection hole having a non-circular cross section (for example, a D-shaped cross section) is formed on the selection motor 14, 16 side of each rotation transmitting member 24, 26, and the tips of motor shafts 18, 20 having the same shape are connected to this connection hole. Fits in the hole and transmits rotation. Further, shaft insertion holes are formed on the other end surfaces of the rotation transmitting members 24, 26, that is, on the ball screw 22 side, and both end portions of the ball screw 22 are inserted into the shaft insertion holes, respectively. The outer peripheral surface of the end portion of the ball screw 22 and the shaft insertion hole have a non-circular cross section similar to the motor shafts 18 and 20 side, and transmit rotation by their engagement. The selection ball screw 22 whose both ends are connected to the selection motors 14 and 16 via the rotation transmitting members 24 and 26, respectively, has a pair of ball bearings 28 disposed in the housing 2 so that the positions of both ends are slightly in front. , 30 are rotatably supported.

  A selection ball nut 32 is screwed through a large number of balls (not shown) near the center of the selection ball screw 22. Therefore, when both the select motors 14 and 16 are driven, the ball screw 22 having both ends connected to the motor shafts 18 and 20 rotates in one direction, and the select ball nut 32 moves axially on the ball screw 22. Move to.

  Between the shift shaft 4 and the select ball screw 22 which are arranged in parallel in the housing 2 and are rotatably supported, a fulcrum shaft 34 in a direction perpendicular to both the shafts 4 and 22 (see FIGS. 5 and 6). Is rotatably supported. One end of the first select lever 36 is fixed to one end of the fulcrum shaft 34. The other end of the first select lever 36 extends in the direction of the shift shaft 4 and is connected to a cylindrical member 38 fitted to the outer periphery of the shift shaft 4. The cylindrical member 38 is coupled to the striker 6 so as to move integrally in the axial direction. Therefore, the striker 6 is connected to the first select lever 36 via the cylindrical member 38, and is moved in the axial direction of the shift shaft 4 together with the cylindrical member 38 by the rotation of the first select lever 36.

  One end of a second select lever 40 is attached to the end side (upper side in FIG. 5) of the fulcrum shaft 34 opposite to the side on which the first select lever 36 is fixed. The second select lever 40 has a leg shape with the other end divided into two branches. A select screw screwed into the ball screw 22 in a U-shaped notch formed in the leg portions 40a, 40a. Engagement pins 32 a and 32 a formed on both sides of the ball nut 32 for engagement are engaged. Accordingly, when the select ball nut 32 moves in the axial direction by the rotation of the select ball screw 22, the second select lever 40 rotates around the fulcrum shaft 34 and is further fixed to the fulcrum shaft 34. The first select lever 36 also rotates. By the rotation of the first select lever 36, the cylindrical member 38 and the striker 6 integrated therewith move in the axial direction of the shift shaft 4, and the transmission is selected.

  A sensing rod 42 parallel to the shift shaft 4 is fixed to a cylindrical member 38 integrated with the striker 6 (see FIGS. 1 and 4 to 6). A guide member 44 is connected to the sensing rod 42 at the end opposite to the end fixed to the cylindrical member 38. This guide member 44 is formed with an arcuate recess 44a (see FIG. 6) and is fitted to the outer peripheral surface of the shift shaft 4. The outer periphery of the shift shaft 44 together with the sensing rod 42 as the striker 6 moves. Move along the plane. A rotation angle detection type select sensor 46 is attached to the side of the housing 2 where the sensing rod 42 is disposed. In the select sensor 46, a U-shaped groove 48a is formed at the tip of a detection lever 48, and a sensing pin 44b provided on the end surface of the guide member 44 is engaged with the U-shaped groove 48a. Match. The selection position of the transmission can be confirmed by the selection sensor 46 detecting the movement of the striker 6 in the axial direction via the sensing pin 44a of the guide member 44 connected to the sensing rod 42.

  A configuration for performing the shift operation of the motor-driven transmission operating device 1 will be described. Two shift motors 50 and 52 are attached in a direction orthogonal to the shift shaft 4 of the housing 2 so as to have a height different from that of the shift shaft 4. In this embodiment, similarly to the select motors 14 and 16. A pair of shift motors 50 and 52 are arranged to face each other.

  The pair of shift motors (the first shift motor 50 and the second shift motor 52) attached to the side portion of the housing 2 have their motor shafts (not shown) facing each other, and one end of each of these motor shafts. Both ends of the two screw shafts (shifting ball screw 54) are connected. The shift ball screw 54 is disposed at right angles to the shift shaft 4. Both the shift motors 50 and 52, like the select motors 14 and 16, rotate at the same speed in the same direction when driven simultaneously, and drive one ball screw 54 from both sides.

  Although the structure of the connecting portion between the motor shafts of both shift motors 50 and 52 and both ends of the shifting ball screw 54 is not shown, it is the same as the connecting portion between the pair of select motors 14 and 16 and the selecting ball screw 22. These are connected via a rotation transmission member. It should be noted that the shift motors 50 and 52 and the shift ball screw 54 can be connected by other structures.

  A shift ball nut 56 is screwed onto the shift ball screw 54 via a number of balls (not shown). A shift lever 58 (see FIGS. 2, 3, and 6) is fixed to the end of the shift shaft 4, and a distal end side of the shift lever 58 is a pair of engagements provided on both sides of the shift ball nut 56. The pins 56a and 56a are engaged. Accordingly, when the shift motors 50 and 52 on both sides are driven, the shift ball screw 54 rotates via the motor shafts of both the motors 50 and 52 so that the shift ball nut 56 is axially moved on the ball screw 54. The shift lever 58 is rotated accordingly. When the shift lever 58 rotates, the shift shaft 4 and the striker 6 splined on the shift shaft 4 rotate integrally. Thereby, a shift operation of a transmission (not shown) is performed.

  The shift ball nut 56 that is screwed into the shift ball screw 54 is provided with an inclination preventing mechanism 60 (see FIGS. 2, 3, and 6). The tilt prevention mechanism 60 is attached to the guide rod 62 fixed to the housing 2 in parallel with the shift ball screw 54 and the ball nut 56, and is slidably fitted to the guide rod 62. An inclination prevention guide 64 is provided. When both the shift motors 50 and 52 are operated, the ball screw 54 rotates and the shift ball nut 56 moves in the axial direction of the ball screw 64 to rotate the shift lever 58. Although the load acts to incline, the inclination prevention mechanism 60 can suppress the inclination when the shift ball nut 56 moves.

  A rotation angle detection type shift sensor 66 (FIGS. 1, 3, 4 and 4) for detecting the shift position of the striker 6 is provided on the end of the housing 2 opposite to the side where the shift motors 50 and 52 are provided. The shift position of the striker 6 is detected by directly detecting the rotation angle of the shift shaft 4 by the shift sensor 66.

  The operation of the motor-driven transmission operating device 1 according to the above configuration will be described. When performing the select operation, the two select motors 14 and 16 are simultaneously driven in the operation direction. When the motor shafts 18 and 20 are rotated by driving both the select motors 14 and 16, the select ball screw 22 connected to the motor shafts 18 and 20 via the rotation transmitting members 24 and 26 is rotated to select the motors. The ball nut 32 moves in the axial direction of the ball screw 22. When the ball nut 32 moves, the second select lever 40 engaged with the engaging pins 32a and 32a of the ball nut 32 rotates about the fulcrum shaft 34, and is further fixed to the fulcrum shaft 34. The first select lever 36 rotates with the fulcrum shaft 34. A striker 6 is connected to the rotation end of the first select lever 36 via a cylindrical member 38. When the striker 6 moves a predetermined amount in the axial direction of the shift shaft 4, the selection operation of the transmission is performed. Is called.

  The axial movement of the striker 6 is transmitted to the sensing rod 42 and the guide member 44 connected to the striker 6 via the cylindrical member 38, and the sensing rod 42 and the guide member 44 are the same amount in the same direction as the striker 6. Move in the axial direction. The detection lever 48 of the select sensor 46 is engaged with the sensing pin 44b attached to the guide member 44, and the amount of movement of the sensing pin 44b in the axial direction is converted into the rotation of the detection lever 48. The movement position in the axial direction, that is, the select position of the transmission is detected by the select sensor 46.

  Subsequently, the shift ball screw 54 is rotated by driving the pair of shift motors 50 and 52. By the rotation of the ball screw 54, the shift ball nut 56 moves in the axial direction of the ball screw 54, and the shift lever 58 is rotated to rotate the shift shaft 4 and the striker 6 to perform the shift operation of the transmission. . The shift operating portion is provided with an inclination prevention mechanism 60 including an inclination prevention guide 64 connected to the shift ball screw 54 and a guide rod 62 supported by the housing 2. There is no possibility that the ball nut for shifting 56 may tilt when it moves in the axial direction of the ball screw 54 as it rotates. The rotation of the shift shaft 4 with which the striker 6 is splined is directly detected by the shift sensor 66, and the shift position of the transmission due to the rotation of the striker 6 is detected from the rotation position of the shift shaft 4. The

  The motor-driven transmission operating device 1 according to this embodiment includes two select motors 14 and 16 for performing the select operation of the striker 6 and two shift motors 50 and 52 for performing the shift operation. Since these two motors 14, 16 or 50, 52 are driven simultaneously to rotate the ball screw 22 or 54, high output can be obtained without increasing the size of the motor. Therefore, it is possible to obtain a high-power motor-driven transmission operating device suitable for mounting a large vehicle such as a large truck without increasing the size of the transmission operating device itself. Further, since two motors are provided on both the select side and the shift side, even if one of them fails, the speed change operation of the transmission can be performed, and safety is improved.

It is a top view of a motor drive type transmission operating device. Example 1 It is an II directional arrow line view of FIG. It is sectional drawing which follows the III-III line of FIG. It is sectional drawing which follows the IV-IV line of FIG. It is sectional drawing which follows the VV line of FIG. It is a perspective view which shows the structure of each member accommodated in the housing of the said motor drive type transmission operating device. It is a top view which shows an example of the conventional motor drive type transmission operation apparatus.

Explanation of symbols

2 Housing 4 Shift shaft 6 Striker 14 Select motor 16 Select motor 22 Transmission means (screw shaft)
32 Transmission means (nut)
36 Transmission means (first select lever)
40 Transmission means (second select lever)
50 Shift motor 52 Shift motor 54 Transmission means (screw shaft)
56 Transmission means (nut)
58 Transmission means (shift lever)

Claims (5)

A shift shaft that is rotatably supported in the housing, a striker that is axially movable on the shift shaft and fitted so as to rotate integrally, a select motor that moves the striker in the axial direction, and the select A motor-driven transmission operating device comprising: transmission means for transmitting a driving force of a motor to the striker; a shift motor for rotating the shift shaft; and a transmission means for transmitting the driving force of the shift motor to the shift shaft. In
A motor-driven transmission operating device characterized in that two selection motors and two shift motors are provided, respectively, and the driving force is always obtained by the two motors during both the selection operation and the shift operation.   The transmission means for transmitting the driving force of the select motor to the striker is arranged in parallel with the shift shaft, and a screw shaft that rotates by driving the select motor, a nut that moves in the axial direction by the rotation of the screw shaft, The motor-driven transmission operating device according to claim 1, further comprising a select lever that moves the striker in accordance with axial movement.   The transmission means for transmitting the driving force of the shift motor to the shift shaft is arranged at a right angle to the shift shaft, and rotates by driving the shift motor, a nut that moves in the axial direction by the rotation of the screw shaft, and a nut The motor-driven transmission operating device according to claim 1, further comprising a shift lever that rotates the shift shaft according to the axial movement of the motor.   4. The motor-driven transmission operating device according to claim 2, wherein the two select motors and the shift motor are respectively arranged opposite to both ends of one screw shaft. 5.   4. The motor-driven transmission operating device according to claim 3, wherein a tilt prevention mechanism is provided on a nut that moves in the axial direction on the screw shaft by the driving force of the shift motor.

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