JP7188248B2 - transmission - Google Patents

Description

The present invention relates to transmissions.

In general, a vehicle enters a neutral state in which a power source such as an engine does not transmit driving force to a transmission when a shift lever is in a neutral position. In such a vehicle, when control including an action to stop or start the engine, such as idle stop control, is performed, whether the vehicle is in a neutral state is one of the conditions for stopping or starting the engine. Need to detect. Particularly for vehicles with manual transmissions, a detector, such as a switch or sensor, is required to detect whether the vehicle is in neutral.

For example, a transmission with two switches that detect whether the shift lever is in a neutral position (whether the vehicle is in neutral) by contacting a control rod mechanically connected to the shift lever. This is proposed in Patent Document 1. In Patent Document 1, signals transmitted from two switches are compared, and if the respective signals contradict each other, it is determined that one of the switches is faulty. With this configuration, the vehicle reliably detects whether the shift lever is in the neutral position.

Patent No. 4967804

On the other hand, since the transmission has many parts, it may be difficult to provide the detector at a position where it can contact the control rod. In addition, when a magnetic sensor is used as a detector, the magnetic sensors are sufficiently spaced apart from each other so that the magnetic flux densities generated by the magnets of the magnetic sensor or the part to be detected detected by the magnetic sensor do not interfere with each other. There is a need. Therefore, it is preferable that the detector and the part to be detected are freely arranged so that the movement of the control rod can be reliably detected indirectly.

Accordingly, the present invention provides a transmission that includes a detector that detects whether or not the shift lever is in the neutral position at a free position away from the control rod, and a detected part that is detected by the detector. With the goal. In particular, this detected part has a structure that is guided by a shift rod that can be connected to a control rod and slides in conjunction with the control rod.

To achieve this object, a vehicle transmission according to claim 1 comprises:
a shift lever and
It has a first central axis, is rotated around the first central axis based on a select operation of the shift lever, and is moved along the first central axis based on a shift operation of the shift lever. a first rod that
a second rod having a second central axis and being moved along the second central axis based on movement of the first rod by the shift operation of the shift lever;
A hollow cylindrical portion provided slidably on the second rod along the second central axis, an engaging portion that engages with the first rod, and a first detected portion. a member to be detected integrally provided;
A first detector fixed to the housing of the transmission and detecting the first detected part,
When the first rod is at a position corresponding to the neutral position of the shift lever, the first detected portion is positioned within the first detection area of the first detector, and the first rod is located at a position corresponding to the shift position of the shift lever, the first detected portion is located outside the first detection area of the first detector. .

The transmission of the embodiment according to claim 2,
a second detected portion provided on the first rod;
a second detector fixed to the housing of the transmission and detecting the second detected portion;
When the first rod is at the position corresponding to the neutral position of the shift lever, the second detected portion is positioned within the second detection area of the second detector, The second detected portion is positioned outside the second detection area of the second detector when the rod is at a position corresponding to the shift position of the shift lever. and

The transmission of the embodiment according to claim 3,
A third rod having a third central axis and moved along the third central axis based on movement of the first rod by the shift operation of the shift lever,
the hollow cylindrical portion of the member to be detected is configured to be rotatable around the second central axis;
It is characterized in that the member to be detected includes a holding portion arranged so as to be slidable on the third rod along the third central axis.

The transmission of the embodiment according to claim 4,
The member to be detected has a first arm extending from the second rod toward the third rod, and the holding portion is provided on the first arm.

The transmission of the embodiment according to claim 5,
The member to be detected has a second arm extending from the second rod toward the first rod, and the engaging portion is provided on the second arm. .

The transmission of the embodiment according to claim 6,
The first detected portion is provided on any one of the hollow cylindrical portion, the first arm, or the second arm.

According to the invention of claim 1 of the present application, a first detector that detects whether or not the shift lever is in a neutral position at a free position away from the first rod; and a detected member having a first detected portion that is detected in the transmission.

According to the invention of claim 2 of the present application, it has a first detector and a second detector, and by comparing signals from the respective detectors, it is possible to determine whether the detector has failed. Can provide gearbox.

According to the third aspect of the invention of the present application, it is possible to provide a transmission including a member to be detected that does not rotate around the second central axis by being guided by the second rod and the third rod.

According to the invention of claim 4 of the present application, it is possible to provide a transmission provided with a member to be detected that does not rotate around the second central axis by being guided by the second rod and the third rod.

According to the invention of claim 5 of the present application, it is possible to provide a transmission provided with a member to be detected that moves in conjunction with the first rod. With this configuration, the first detector can detect the first detected part at a position away from the first rod.

According to the sixth aspect of the present invention, it is possible to provide a transmission in which the first detector can detect the first detected portion at a position away from the first rod. With this arrangement, it can be detected whether the shift lever is in the neutral position.

It is a figure which shows the shift lever of a vehicle typically. FIG. 4 is a schematic diagram showing a control rod and a shift rod included inside the transmission; FIG. 3 is a schematic view of a control rod and a shift rod viewed from the back side of FIG. 2; FIG. 4 is a schematic diagram showing the configuration of a shift operation transmission mechanism that the control rod has; FIG. 3 is a cross-sectional view taken along line VV of FIG. 2; FIG. 4 is a diagram schematically showing the relationship between a finger lever of a control rod and a gate holder groove of a shift rod; It is a schematic diagram showing the configuration of a first detected portion. FIG. 4 is a cross-sectional view taken along line VIII-VIII of FIG. 3;

An embodiment of a transmission according to the present invention will be described below with reference to the accompanying drawings.

[Shift mechanism]
FIG. 1 shows a shift mechanism of a vehicle manual transmission. The illustrated shift mechanism 200 is arranged next to the driver (not shown), and includes a shift lever 210 that moves vertically and horizontally in FIG. Prepare. Guide plate 212 includes a guide slot 214 through which shift lever 210 passes. The guide slot 214 has one horizontal hole 216 extending in the horizontal direction in FIG. 1 and a plurality of vertical holes 218 _R , 218 ₁ to 218 ₆ extending in the vertical direction in FIG.

The lateral hole 216 has four select positions (neutral positions) 220 _R , 220 ₁₂ , 220 ₃₄ , 220 ₅₆ equally spaced from left to right in FIG. The plurality of vertical holes are vertical holes _218R extending upward from the leftmost select position 220R, vertical holes ₂₁₈₁ and ₂₁₈₂ extending vertically from the select position _{22012 ,} and vertical holes ₂₁₈₃ and ₂₁₈₄ extending vertically from the select position ₂₂₀₃₄ . , and vertical holes 218 ₅ and 218 ₆ extending vertically from the select position 220 ₅₆ . Further, the ends of the vertical holes 218 _R and 218 ₁ to 218 ₆ are set at a reverse shift position 222 _R and 1st to 6th gear shift positions 222 ₁ to 222 ₆ , respectively.

According to the shift mechanism 200 configured in this manner, after the shift lever 210 is moved along the horizontal hole 216 to the select position 220 _R , 220 ₁₂ , 220 ₃₄ , or 220 ₅₆ , the vertical hole 218 _R corresponding to the select position is moved. , 218 ₁ to 218 ₆ , the shift lever 210 can be positioned at the desired shift positions 222 _R , 222 ₁ to 222 ₆ .

Hereinafter, the movement and operation of the shift lever 210 along the lateral hole 216 are referred to as "select operation" and "select operation", respectively, and the movement and operation of the shift lever 210 along the vertical holes 218 _R and 218 ₁ to 218 ₆ are respectively referred to as ""shiftoperation" or "shift operation". The direction along the lateral hole 216 is called the "selection direction", of which the direction from left to right in FIG. 1 is the "selection (+) direction" and the direction from right to left in FIG. "Direction". The upward direction from the lateral hole 216 is called the "shift direction", the upward direction from the lateral hole 216 is called the "shift (+) direction", and the downward direction from the lateral hole 216 is called the "shift (-) direction".

The movement of the shift lever 210 described above is transmitted to the transmission gear movement mechanism 100 shown in FIGS.

[Gear movement mechanism]
2 and 3 show the gear movement mechanism 100. FIG. The gear moving mechanism 100 includes one control rod (first rod) 10 and a plurality of shift rods (second rods or third rods) 12, 14, 16, 18 extending parallel to the control rod 10. have

[Control rod]
The control rod 10 consists of a rod with a circular cross section, and is movably mounted along the longitudinal center axis of the control rod 10 and rotatable around the center axis. ). 2 and 3, the direction parallel to the central axis of the control rod 10 (horizontal direction in the figure) is called the "shift direction", and the direction from left to right in the figure is the "shift (+) direction". The direction from right to left is called "shift (-) direction". The “shift (+) direction” and “shift (−) direction” of the control rod 10 correspond to the “shift (+) direction” and “shift (−) direction” of the shift lever 210 . Moving the shift lever 210 in its shift (+) direction moves the control rod 10 in its shift (+) direction, and moving the shift lever 210 in its shift (-) direction moves the control rod 10 in its shift (-) direction. move to The circumferential direction centered on the central axis of the control rod 10 is called the "selection direction", and the counterclockwise direction when viewing the control rod 10 shown in FIG. ) direction”, and the clockwise direction is called the “select (-) direction”. The "select (+) direction" and "select (-) direction" of the control rod 10 correspond to the "select (+) direction" and "select (-) direction" of the shift lever 210, respectively. Moving the shift lever 210 in its select (+) direction moves the control rod 10 in its select (+) direction, and moving the shift lever 210 in its select (-) direction moves the control rod 10 in its select (-) direction. move to

The control rod 10 has a select operation transmission mechanism 20 that transmits the select operation of the shift lever 210 to the control rod 10 and a shift operation transmission mechanism 22 that transmits the shift operation of the shift lever 210 to the control rod 10 .

[Select operation transmission mechanism]
The select operation transmission mechanism 20 has a select shaft 24 rotatably supported by the transmission housing 300 . An input-side select arm 26 is connected to one end of the select shaft 24 . The input-side select arm 26 is connected to a shift lever 210 via a select wire 28 at a portion away from the connection with the select shaft 24 . On the other hand, an output-side select arm 30 is connected to the other end of the select shaft 24 . The output-side select arm 30 is provided with a select pin 32 at a location away from the connecting portion with the select shaft 24 . A select ring 34 is fixed to the control rod 10 corresponding to the select pin 32 . An engagement groove 36 extending along the axial direction of the control rod 10 is formed on the outer periphery of the select ring 34 (see FIG. 3). The select pin 32 is engaged with this engagement groove 36 . As a result, when the shift lever 210 is moved along the lateral hole 216 , the movement of the shift lever 210 selects through the select wire 28 , the input side select arm 26 , the select shaft 24 , the output side select arm 30 , the select pin 32 and the engagement groove 36 . When the shift lever 210 is moved in the select (+) direction, the control rod 10 rotates in the select (+) direction, and when the shift lever 210 is moved in the select (-) direction, the control rod 10 rotates in the select (-) direction. ) direction.

[Shift operation transmission mechanism]
The shift operation transmission mechanism 22 has a shift shaft 38 rotatably supported by the transmission housing 300 . An input-side shift arm 40 is connected to one end of the shift shaft 38 . The input-side shift arm 40 is connected to a shift lever 210 via a shift wire 42 at a portion away from the connection with the shift shaft 38 . On the other hand, an output-side shift arm 44 is connected to the other end of the shift shaft 38 . As shown in FIG. 4 , the output-side shift arm 44 is provided with a projection 46 at a location away from the connection with the shift shaft 38 . Corresponding to the protrusion 46, the control rod 10 is partially cut to form an engagement groove 48 extending in the lateral direction (direction orthogonal to the axis). The protrusion 46 is engaged with this engagement groove 48 . As a result, when the shift lever 210 is moved along the vertical holes 218 _R , 218 ₁ to 218 ₆ , the movement of the shift wire 42 , the input side shift arm 40 , the shift shaft 38 , the output side shift arm 44 , the protrusion 46 , and the engaging portion 46 are engaged. It is transmitted to the control rod 10 via the groove 48, and when the shift lever 210 is moved in the shift (+) direction, the control rod 10 moves in the shift (+) direction, and when the shift lever 210 is moved in the shift (-) direction, the control The rod 10 is designed to move in the shift (-) direction.

[Shift rod]
The plurality of shift rods are 1st and 2nd gear shift rods 12 corresponding to 1st and 2nd gears (not shown), 3rd and 4th gear shift rods 14 corresponding to 3rd and 4th gears (not shown), It has a 5th and 6th gear shift rod 16 corresponding to 5th and 6th gear (not shown) and an R shift rod 18 corresponding to reverse gear (not shown). Each of the four shift rods 12-18 consists of a bar with a circular cross section and is supported on the transmission housing 300 so as to be movable in the shift direction along each longitudinal central axis.

[Shift rod movement mechanism]
The shift rods 12, 14, 16, 18 and the control rod 10 are provided with shift rods that move the corresponding shift rods in the desired direction (shift (+) direction or shift (-) direction) according to the movement of the shift lever 210. A rod moving mechanism 50 is provided. As shown in FIG. 5, the shift rod moving mechanism 50 has gate holders 52, 54, 56 and 58 fixed to the shift rods 12, 14, 16 and 18, respectively. The gate holders 52, 54, 56, 58 have projections 62, 64, 66, 68 extending radially outward from the central axes of the shift rods 12, 14, 16, 18, respectively. The projecting portions 62, 64, 66, 68 are composed of a pair of engaging branch portions (forks) 72, 74, 76, 78 facing each other at a predetermined interval in the direction of the central axis of the control rod 10, and a pair of engaging branch portions. It has grooves 82, 84, 86 and 88 formed between 72, 74, 76 and 78 respectively. As shown, the grooves 82, 84, 86, 88 of the gate holders 52, 54, 56, 58 are arranged on the same circumference with the control rod 10 as the center. Preferably, grooves 82 , 84 , 86 , 88 also have the same depth radially of control rod 10 . Specifically, grooves 82, 84, 86, and 88 have distal groove ends (groove bottoms) away from control rod 10 and proximal groove ends (groove openings) near control rod 10, respectively. , on two circumferences 90 , 92 centered on the central axis of the control rod 10 .

On the other hand, a finger lever 94 is fixed to the control rod 10 . As shown in FIG. 5 , the finger lever 94 protrudes radially outward (radially) of the control rod 10 . The width of the tip 96 of the finger lever 94 in the axial direction of the control rod 10 is determined slightly smaller than the width of the grooves 82, 84, 86, 88 of the gate holders 52, 54, 56, 58 in the same direction. It is Further, the length of the finger lever 94 is shorter than the radius of the distal circumference 92 of the grooves 82, 84, 86, 88 of the gate holders 52, 54, 56, 58 and the radius of the proximal circumference 90 determined longer than

As for the fixing position of the finger lever 94 in the axial direction of the control rod 10, when the shift lever 210 is at the select position _220R , ₂₂₀₁₂ , ₂₂₀₃₄ , or ₂₂₀₅₆ of the lateral hole 216, the tip 96 of the finger lever 94 is positioned at the gate holder. It is determined to be positioned on the same cross section as the grooves 82, 84, 86, 88 of 52, 54, 56, 58. Therefore, when the shift lever 210 is moved along the lateral hole 216, the control rod 10 rotates, and the distal end portion 96 of the finger lever 94 passes through the grooves 82, 84, 86, 88 of the shift rods 12, 14, 16, 18. go.

The positions of the grooves 82, 84, 86, 88 of the shift rods 12, 14, 16, 18 correspond to the select positions ₂₂₀₁₂ , ₂₂₀₃₄ , ₂₂₀₅₆ , _220R of the shift lever 210 shown in FIG. Specifically, groove 82 on shift rod ₁₂ corresponds to select position 220-12, groove 84 on shift rod 14 corresponds to select position _220-34 , groove 86 on shift rod 16 corresponds to select position _220-56 , and shift The groove 88 of the rod 18 corresponds to the select position _220R .

As shown in FIGS. 1 and 6, movement of shift lever 210 in the shift (+) direction from select positions 220 ₁₂ , 220 ₃₄ , 220 ₅₆ , 220 _R to shift positions 222 ₁ , 222 ₃ , 222 ₅ , 222 _R. corresponds to movement of the control rod 10 in the shift (+) direction. Further, movement of the shift lever 210 in the shift (-) direction from select positions 220 ₁₂ , 220 ₃₄ , 220 ₅₆ to shift positions 222 ₂ , 222 ₄ , 222 ₆ corresponds to movement of the control rod 10 in the shift (-) direction. Yes.

Therefore, when the shift lever 210 is set to the select position _220R , the tip portion 96 of the finger lever 94 is positioned in the groove portion 88 of the shift rod 18, and the shift lever 210 is further directed toward the shift position _222R from this state. At the same time, the control rod 10 moves in the shift (+) direction, whereby the finger lever 94 engages one of the engagement branches 78 of the gate holder 58 and moves the shift rod 18 in the shift (+) direction. Moving. Also, when the shift lever 210 is set to the select position 220 ₁₂ , 220 ₃₄ or 220 ₅₆ , the tip 96 of the finger lever 94 is positioned in the groove 82 , 84 or 86 of the shift rod 12 , 14 or 16 . When the shift lever 210 is further moved from this state toward the shift position 222 ₁ , 222 ₃ , or 222 ₅ , the control rod 10 is simultaneously moved in the shift (+) direction, thereby causing the finger lever 94 to move to the gate holder. One of the engagement branches 72, 74 or 76 of 52, 54 or 56 is engaged to move the shift rod 12, 14 or 16 in the shift (+) direction. Conversely, when the shift lever 210 is moved from the select position 220 ₁₂ , 220 ₃₄ , or 220 ₅₆ toward the shift position 222 ₂ , 222 ₄ , or 222 ₆ , the control rod 10 moves at the same time. moving in the shift (-) direction, whereby the finger lever 94 engages the other engaging branch 72, 74, or 76 of the gate holder 52, 54, or 56, and shifts the shift rod 12, 14, or 16. Move in the shift (-) direction.

[Gear movement mechanism]
The shift rods 12, 14, 16, 18 have corresponding gear movement mechanisms. In the embodiment, shift ends 102, 104, 106 and 108 are secured to shift rods 12, 14, 16 and 18, respectively (see Figures 2, 3 and 5). Shift ends 102, 104, 106 and 108 are provided with shift forks 112, 114, 116 and 118, respectively. The shift forks 112, 114, 116, 118 correspond to 1st, 2nd, 3rd, 4th, 5th, 6th and reverse gears (not shown), respectively. Specifically, the shift fork 118 corresponds to a reverse gear, and when the shift rod 18 is moved in the shift (+) direction by moving the shift lever 210 from the select position 220 _R to the shift position 222 _R , the shift fork 118 When the shift rod 18 is moved in the shift (-) direction by connecting the reverse gear to the drive system and returning the shift lever 210 from the shift position 222 _R to the select position 220 _R , the shift fork 118 releases the reverse gear from the drive system. . Shift forks 112, 114, and 116 correspond to 1st, 2nd, 3rd, 4th, and 5th, 6th gears, respectively, and shift lever 210 from select positions 220 ₁₂ , 220 ₃₄ , 220 ₅₆ to shift position When the shift rods 12, 14, 16 are moved in the shift (+) direction by moving to 222 ₁ , 222 ₃ , 222 ₅ , the shift forks 112, 114, 116 shift the 1st, 3rd and 5th gears to the drive system. , and conversely, by moving the shift lever 210 from the select positions 220 ₁₂ , 220 ₃₄ , 220 ₅₆ to the shift positions 222 ₂ , 222 ₄ , 222 ₆ , the shift rods 12, 14, 16 are moved in the shift (-) direction. , the shift forks 112, 114, 116 connect the 2nd, 4th, and 6th gears to the drive system.

[Neutral detection mechanism]
In the transmission having the gear moving mechanism 100 of the embodiment described above, the transmission is set in neutral by positioning the shift lever 210 at the select positions (neutral positions) 220 _R , 220 ₁₂ , 220 ₃₄ , and 220 ₅₆ . , there are two neutral detection mechanisms--a first neutral detection mechanism 400 and a second neutral detection mechanism 500.

[First Neutral Detection Mechanism]
As shown in FIGS. 7 and 8, the first neutral detection mechanism 400 has a member 402 to be detected. The detected member 402 is supported by the shift rod (second rod) 14 . The detected member 402 has a hollow cylindrical portion 404 made of an elastically deformable material. The hollow cylindrical portion 404 has an inner diameter slightly larger than the outer diameter of the shift rod 14 , and is mounted on the shift rod 14 to be movable in the axial direction of the shift rod 14 .

The hollow tubular portion 404 integrally includes two arms, a first arm 406 and a second arm 408, projecting radially outward.

The first arm 406 is integrally provided with a substantially C-shaped holding portion 410 . The holding portion 410 has a substantially C-shaped inner peripheral surface 414 centered on a central axis 412 parallel to the long axes of the shift rods 14 and 16 . The diameter of the inner peripheral surface 414 is the same as or substantially the same as the outer diameter of the shift rod (third rod) 16 . A central angle 420 from one end 416 to the other end 418 in the circumferential direction of the inner peripheral surface 414 is slightly larger than 180 degrees. Further, the distance from the central axis 412 of the inner peripheral surface 414 to the central axis 422 of the shift rod 14 is set equal to the distance from the central axis 422 of the shift rod 14 to the central axis 424 of the shift rod 16 . Therefore, after attaching the hollow tubular portion 404 to the shift rod 14 from one end thereof, the hollow tubular portion 404 is rotated around the shift rod 14 so that the substantially C-shaped holding portion 410 , particularly the inner peripheral surface 414 , one end 416 and the other. By pressing the end 418 against the outer peripheral surface of the shift rod 16, the holding portion 410 is slightly elastically deformed, and the distance between the one end 416 and the other end 418 is widened to hold the shift rod 16 in the holding portion 410 (snap fit). . In order to snap-fit the holding portion 410 in this manner, the central angle 420 of the inner peripheral surface 414 is determined to be larger than 180 degrees as described above. The size of the central angle 420 can be determined according to the elastic modulus of the material forming the hollow tubular portion 404 so that the retaining portion 410 can be snap-fitted to the shift rod 16 based on the elastic deformation of the retaining portion 410 described above. preferable.

The second arm 408 has an engaging portion 426 at its distal end. Corresponding to the engaging portion 426, on the outer periphery of the control rod 10, a cut portion (removed portion) consisting of a small diameter portion having a predetermined length in the axial direction is formed by uniformly cutting the outer peripheral surface of the control rod 10 in the circumferential direction. An engaging portion) 428 is formed.

The position and size of the first arm 406 and the second arm 408 are such that the retainer 410 of the first arm 406 is snap fit onto the shift rod 16 as shown, while the second arm 408 is Engagement portion 426 is determined to engage cutout portion 428 . As shown, the engaging portion 426 and the cutting portion 428 preferably have approximately the same length with respect to the axial direction of the control rod 10 .

The hollow cylindrical portion 404 has a first detected portion 430 on its outer peripheral surface. On the other hand, a first detector 432 is provided in the housing 300 of the transmission. The first detector 432 can be a contact or non-contact sensor. In the embodiment, the hollow cylindrical portion 404 is made of a non-magnetic material, the first detected portion 430 is made of a magnetic material (for example, iron), and a magnetic sensor is adopted as the first detector 432. ing.

The first detector 432 detects that the first arm 406 is holding the shift rod 16, the second arm 408 is engaging the control rod 10, and the shift lever 210 is in the select positions 220 ₁₂ , 220 12 , as shown. 220 ₃₄ , 220 ₅₆ , 220 _R (the transmission is set to neutral), the detection area or detection surface 434 of the first detector 432 is on the first detected portion 430. In close proximity, a first detector 432 is positioned on the housing 300 to detect the first detectable portion 430 .

Therefore, when the shift lever 210 is set to the select positions 220 ₁₂ , 220 ₃₄ , 220 ₅₆ and 220 _R , the first detector 432 detects the first detected portion 430 and the first detection signal to output On the other hand, when the shift lever 210 moves from the select positions 220 ₁₂ , 220 ₃₄ , 220 ₅₆ , 220 _R to the shift positions 222 _R , 222 ₁ to 222 ₆ , the control rod 10 moves in the shift (+) or shift (−) direction. , the first detected portion 430 is separated from the first detection surface 434 . Therefore, when the shift lever 210 is set to the shift positions 222 _R , 222 ₁ to 222 ₆ , the first detector 432 does not detect the first detected portion 430, and the first non-detection signal to output

[Second Neutral Detection Mechanism]
As shown in FIGS. 2 and 3, the second neutral detection mechanism 500 has a second detector 502 . The second detector 502 can be a contact or non-contact sensor. In the embodiment, the second detector 502 employs a magnetic sensor, and is fixed to the transmission housing 300 such that its detection surface or detection area 504 faces a second detected portion to be described later. It is

A second detected part is formed in a control rod 10 made of a magnetic material (for example, iron). In the embodiment, by forming the above-described cutout (engaged portion) 428 near the end of the control rod 10 , the axial direction of the control rod 10 can be adjusted between the cutout 428 and one end surface 506 of the control rod 10 . A large-diameter non-removed portion having a predetermined length (width) is left in the second detection target portion 508 .

Second detector 502 (in particular, detection area 504) and second detected portion 508 are in a state where shift lever 210 is set to select positions 220 ₁₂ , 220 ₃₄ , 220 ₅₆ , 220 _R (the transmission is (set to neutral), the second detection surface 504 of the second detector 502 is positioned to face the second detected portion 508 . Therefore, second detector 502 detects second detected portion 508 while shift lever 210 is set to select positions 220 ₁₂ , 220 ₃₄ , 220 ₅₆ , and 220 _R , and outputs a second detection signal. Output. On the other hand, when the shift lever 210 moves from the select positions 220 ₁₂ , 220 ₃₄ , 220 ₅₆ , 220 _R to the shift positions 222 _R , 222 ₁ to 222 ₆ , the control rod 10 moves in the shift (+) or shift (−) direction. , the second detected portion 508 moves out of the second detection area 504 . Therefore, when the shift lever 210 is set to the shift positions 222 _R , 222 ₁ to 222 ₆ , the second detector 502 does not detect the second detected portion 508 and outputs the second non-detection signal. do.

As shown in FIGS. 2 and 3, the first and second detectors 432, 502 of the first and second neutral detection mechanisms 400, 500 are both connected to the controller 600. FIG. Accordingly, the controller 600 detects that the transmission is set to neutral based on the outputs of the first and second detectors 432,502. Specifically, when first and second detection signals are output from first and second detectors 432 and 502, controller 600 determines that shift lever 210 is in the neutral position. Further, when the first and second non-detection signals are output from the first and second detectors 432 and 502, the controller 600 determines that the shift lever 210 is in a position other than the neutral position (one of the shift positions). It is determined that there is Furthermore, when one of the first and second detectors 432 and 502 outputs a detection signal and the other outputs a non-detection signal, the controller 600 detects whether the first or second neutral detection mechanism 400 or 500 is out of order.

As described above, according to the transmission provided with the neutral detection mechanism according to the embodiment, it is reliably detected that the shift lever is placed in the neutral position and that any of the neutral detection mechanisms is out of order. can.

[Other embodiments]
In the above-described embodiment, the cut portion (engaged portion) 428 is formed by uniformly cutting the outer peripheral surface of the control rod 10 in the circumferential direction, but it is not necessary to cut the entire circumference of the control rod 10 . For example, a portion of the control rod 10 in the circumferential direction may be shaved to form the engaged portion. In this case, the member to be detected is formed so that the engaging portion of the member to be detected of the first neutral detection mechanism can engage with the portion to be engaged. Also, the engaged portion may be formed by a projection formed by protruding a part of the control rod radially outward. In this case, the engaging portion of the member to be detected is configured to engage with the projection.

In the above-described embodiment, the second detected portion 508 of the second neutral detection mechanism 500 is formed between the cut portion 428 and the one end surface 506 of the control rod 10, but is formed at another position. may be For example, two cut-away portions may be formed in the central portion or the other end side of the control rod in the longitudinal direction, and the large-diameter second detected portion may be formed therebetween. In this case, the second detector is arranged such that the second detection surface can detect the second detected part. Further, the member to be detected of the first neutral detection mechanism is arranged so as to be engaged with one of the resection portions. Furthermore, the first detector is arranged such that the first detection surface can detect the first detected part.

In the above-described embodiment, the hollow cylindrical portion 404 of the first neutral detection mechanism 400 is provided on the shift rod 14, but may be provided on another shift rod.

In the above-described embodiments, the detected member 402 does not have to include the first arm 406 and the holding portion 410 . In this case, for example, the engaging portion 426 of the second arm 408 may be engaged with the cutting portion 428 so that the hollow cylindrical portion 404 of the detected member 402 does not rotate around the shift rod 14 . Alternatively, other anti-rotation means may be provided. For example, the hollow tubular portion of the member to be detected and the shift rod each have an uneven shape extending in the axial direction, and the uneven shapes are engaged with each other, so that the hollow tubular portion can move in the axial direction of the shift rod. In addition, it may be constructed so as not to rotate around the shift rod. Alternatively, the rotation of the member to be detected may be prevented by engaging the holding portion of the first arm of the member to be detected with another shift rod or another component in the transmission.

In the above-described embodiment, the detected member 402 is arranged on one end side of the shift rod 14 and the second detected portion 508 is arranged on one end side of the control rod 10. The detector can be provided at any position on each rod. Therefore, the first detector and the second detector can be arranged regardless of the shape of the transmission housing and avoiding interference with adjacent devices. This increases the degree of freedom in designing the transmission and the devices adjacent to it.

In the above-described embodiment, the transmission with gear movement mechanism 100 has two neutral detection mechanisms--first neutral detection mechanism 400 and second neutral detection mechanism 500, but only the first neutral detection mechanism. may be provided.

Although the first detected portion 430 is provided on the outer peripheral surface of the hollow cylindrical portion 404 in the above-described embodiment, the first detected portion may be provided on the first arm or the second arm.

10: First rod (control rod)
14: Second rod (shift rod)
210: Shift lever 220 _R , 220 ₁₂ , 220 ₃₄ , 220 ₅₆ : Neutral position (select position)
222 _R , 222 ₁ , 222 ₂ , 222 ₃ , 222 ₄ , 222 ₅ , 222 ₆ : Shift position 300: Housing 402: Member to be detected 404: Hollow cylindrical portion 422: Second central shaft 426: Engaging portion 430: First detected portion 432: First detector 434: First detection area (detection surface)

Claims (6)

A transmission for a vehicle,
a shift lever and
It has a first central axis, is rotated around the first central axis based on a select operation of the shift lever, and is moved along the first central axis based on a shift operation of the shift lever. a first rod that
and a second rod that has a second central axis and is moved along the second central axis based on movement of the first rod by the shift operation of the shift lever,
A hollow cylindrical portion provided slidably on the second rod along the second central axis, an engaging portion that engages with the first rod, and a first detected portion. a member to be detected integrally provided;
A first detector fixed to the housing of the transmission and detecting the first detected part,
When the first rod is at a position corresponding to the neutral position of the shift lever, the first detected portion is positioned within the first detection area of the first detector, and the first rod is located at a position corresponding to the shift position of the shift lever, the first detected portion is positioned outside the first detection area of the first detector. a second detected portion provided on the first rod;
a second detector fixed to the housing of the transmission and detecting the second detected portion;
When the first rod is at the position corresponding to the neutral position of the shift lever, the second detected portion is positioned within the second detection area of the second detector, wherein the second detected portion is positioned outside the second detection area of the second detector when the rod is at a position corresponding to the shift position of the shift lever. Transmission according to claim 1. A third rod having a third central axis and moved along the third central axis based on movement of the first rod by the shift operation of the shift lever,
the hollow cylindrical portion of the member to be detected is configured to be rotatable around the second central axis,
3. The transmission according to claim 1, wherein the member to be detected includes a holding portion arranged so as to be slidable on the third rod along the third central axis. The member to be detected has a first arm extending from the second rod toward the third rod, and the holding portion is provided on the first arm. Transmission according to claim 3. The member to be detected includes a second arm extending from the second rod toward the first rod, and the engaging portion is provided on the second arm. 5. The transmission according to claim 4. 6. A transmission according to claim 5, wherein said first detected portion is provided on any one of said hollow tubular portion, said first arm, and said second arm.

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