Vehicle transfer

Patent metadata

Field	Value
Publication number	US-9772035-B2
Application number	US-201615340247-A
Country	US
Kind code	B2
Filing date	Nov 1, 2016
Priority date	Nov 11, 2015
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

A vehicle transfer includes an input shaft, an output shaft, an output member, a clutch, a motor, a screw mechanism, a transmitting mechanism, a fork shaft, an amplifying link mechanism, a high-low switching mechanism, and a fork. The fork shaft is configured to move in an axial direction of the fork shaft. The amplifying link mechanism is connected to the nut member and the fork shaft. The amplifying link mechanism is configured to amplify an amount of movement of the nut member in the direction of the common axis and transmit the amplified amount of movement to the fork shaft. The fork is connected to the fork shaft. The fork is configured to transmit moving force of the fork shaft to the high-low switching mechanism such that the high-low switching mechanism switches between the high-speed gear and the low-speed gear.

First claim

What is claimed is:

1. A vehicle transfer comprising:
an input shaft;
an output shaft that is arranged on a common axis with the input shaft;
an output member configured to output power to a different output destination than the output shaft;
a clutch configured to transmit or interrupt a transmission of some of the power of the output shaft from the output shaft to the output member, or adjust transfer torque that is transmitted from the output shaft to the output member;
a motor;
a screw mechanism that includes a threaded shaft member and a nut member that are a pair of screw members, the screw mechanism being supported by the output shaft; the threaded shaft member and the nut member screwing together; the screw mechanism configured to rotatably drive one of the screw members, of the threaded shaft member and the nut member, with the motor such that the nut member moves in a direction of the common axis;
a transmitting mechanism configured to transmit a movement of the nut member that is in the direction of the common axis to the clutch;
a fork shaft that is arranged parallel to the output shaft, the fork shaft configured to move in an axial direction of the fork shaft;
an amplifying link mechanism that is connected to the nut member and the fork shaft, the amplifying link mechanism configured to amplify an amount of movement of the nut member in the direction of the common axis and transmit the amplified amount of movement to the fork shaft;
a high-low switching mechanism configured to change a rate of rotation of the input shaft and transmit a resultant rotation to the output shaft, the high-low switching mechanism including a high-speed gear and a low-speed gear; and
a fork that is connected to the fork shaft, the fork configured to transmit moving force of the fork shaft to the high-low switching mechanism such that the high-low switching mechanism switches between the high-speed gear and the low-speed gear.

2. The vehicle transfer according to claim 1 , wherein:
the amplifying link mechanism includes a shift member, an amplifying lever, and a fixed base;
one end portion of the shift member is connected to the nut member such that the one end portion of the shift member moves parallel to the direction of the common axis;
another end portion of the shift member is connected to a longitudinally intermediate portion of the amplifying lever such that the other end portion of the shift member rotates relatively around a first axis that is orthogonal to the common axis;
one end portion of the amplifying lever is connected to the fixed base such that the one end portion of the amplifying lever rotates relatively around a second axis that is orthogonal to the common axis;
another end portion of the amplifying lever is connected to the fork shaft such that the other end portion of the amplifying lever rotates relatively around a third axis that is orthogonal to the common axis; and
the amplifying link mechanism is configured such that an amount of movement of the shift member in the direction of the common axis is amplified and becomes an amount of movement of the fork shaft in the axial direction of the fork shaft.

3. The vehicle transfer according to claim 2 , further comprising:
a locking mechanism configured to connect the output shaft and the output member together in a manner in which the output shaft and the output member are unable to rotate relative to each other around the common axis, the locking mechanism configured to be driven by the high-low switching mechanism, wherein
the shift member is configured to move to an L 4 position of the shift member, an H 2 position of the shift member, and an H 4 position of the shift member, by the movement of the nut member in the direction of the common axis, the L 4 position of the shift member being a position of the shift member in which the low-speed gear is established in the high-low switching mechanism and the output shaft and the output member are connected together in a manner unable to rotate relative to each other around the common axis in the locking mechanism, the H 2 position of the shift member being a position of the shift member in which the high-speed gear is established in the high-low switching mechanism and the transmission of some of the power of the output shaft to the output member is interrupted in the clutch, the H 4 position of the shift member being a position in which the high-speed gear is established in the high-low switching mechanism and some of the power of the output shaft is transmitted to the output member in the clutch; and
the amplifying link mechanism is configured to move the fork shaft in response to the shift member moving from the output shaft side to the input shaft side in the direction of the common axis such that the fork shaft switches between the L 4 position of the fork shaft and the H 2 position of the fork shaft.

4. The vehicle transfer according to claim 3 , wherein
the amplifying link mechanism includes a roller-shaped interlocking pin;
the fixed base, the amplifying lever, and the shift member are configured to each slidingly contact each other at a right angle to the axis of the fork shaft;
a portion of the roller-shaped interlocking pin is housed in a through-hole through the amplifying lever such that the roller-shaped interlocking pin moves in an axial direction of the roller-shaped interlocking pin;
the shift member includes an engaging recessed portion that receives one end portion of the roller-shaped interlocking pin when the shift member is in a position from the L 4 position of the shift member to the H 2 position of the shift member;
the fixed base includes an engaging recessed portion that receives another end portion of the roller-shaped interlocking pin when the shift member passes the H 2 position of the shift member and is in the H 4 position of the shift member;
the fixed base includes a stopper;
the amplifying link mechanism is configured to urge the amplifying lever in the axial direction of the fork shaft with the shift member via the roller-shaped interlocking pin when the shift member is in a position from the L 4 position of the shift member to the H 2 position of the shift member, when the shift member moves from the L 4 position of the shift member to the H 4 position of the shift member; and
the amplifying link mechanism is configured to stop movement of the amplifying lever with the stopper when the shift member passes the H 2 position of the shift member, when the shift member moves from the L 4 position of the shift member to the H 4 position of the shift member.

5. The vehicle transfer according to claim 1 , wherein:
the clutch is either a single disc clutch or a multiple disc clutch; and
the clutch is configured to adjust the transfer torque to the output member.

6. The vehicle transfer according to claim 1 , wherein the nut member and the threaded screw member screw together via a plurality of balls.

Assignees

• Toyota Motor Co Ltd

Inventors

• Imafuku Mizuki
• Maruyama Yuya

Classifications

• F16H63/304 Primary

  the final output mechanisms comprising elements moved by electrical or magnetic force (band brake actuating mechanisms F16H63/3003) · CPC title

• F16H25/2204

  with balls · CPC title

• F16H37/065

  with a plurality of driving or driven shafts (F16H37/0806 takes precedence) · CPC title

• F16H2063/3063

  using screw devices · CPC title

• B60K17/344

  having a transfer gear · CPC title