JP6687427B2 - Vehicle transmission - Google Patents

Description

TECHNICAL FIELD The present invention relates to a technical field of a transmission for a vehicle including a range switching lever that is rotated by operating a select lever.

JP, 9-257119, A Japanese Utility Model Publication No. 62-68879

  2. Description of the Related Art Some vehicles such as automobiles are provided with a transmission, such as an automatic transmission, for changing gears in response to an operation on a select lever. Such a transmission is configured by arranging required parts inside and outside the transmission case, and has a range switching mechanism on the side surface side (outer surface side) of the transmission case (see, for example, Patent Document 1).

  The range switching mechanism has a transmission body such as a cable or a rod, a range switching lever that is rotated in response to an operation on the select lever, and an inhibitor switch that switches the range according to the rotational position of the range switching lever. .

  When the select lever is operated, the operating force for the select lever is transmitted to the range switching lever via the transmission body, the range switching lever is rotated according to the operation of the select lever, and the inhibitor switch moves the range switching lever. A signal corresponding to the rotational position of is changed to control gear shifting and forward / backward movement. When the select lever is operated to the parking range (P) or the neutral range (N), the electric circuit in the inhibitor switch is turned on and the engine can be started.

  As described above, such a range switching mechanism is arranged outside the transmission case, and as described in Patent Document 1, a range switching lever is formed in an arm shape extending substantially vertically, and a cable, etc. The transmission body is positioned so as to extend substantially forward and backward, and the rear end portion of the transmission body is connected to the range switching lever. Therefore, the range switching lever and the transmission body are positioned substantially orthogonal to each other.

  By the way, the vehicle is also run in cold regions. Therefore, the range switching mechanism arranged on the outside of the transmission case is attached with snow that is bounced up when the vehicle is traveling on a snowy road or a snowmelt road in a state of remaining snow, and the adhered snow is solidified and stays on the side surface of the inhibitor switch. There is a risk.

  When snow accumulates on the side surface of the inhibitor switch, the range switching lever and the transmission body are positioned substantially orthogonal to each other on the side of the inhibitor switch as in the structure described in Patent Document 1. If the accumulated snow is present on the turning locus of the range switching lever, the turning operation of the range switching lever may be hindered, and the proper operating state of the range switching mechanism may not be secured. There is.

  Therefore, there is a vehicle provided with a snow cover in order to prevent such accumulation of snow and ensure an appropriate operating state of the range switching mechanism (for example, see Patent Document 2).

  In the vehicle described in Patent Document 2, a snow cover for covering the automatic operation link system from below is provided, and the snow cover prevents snow from accumulating in the range switching mechanism.

  However, in the vehicle described in Patent Document 2, since the snow cover is provided and the work for attaching the snow cover is required, there is a disadvantage that the manufacturing cost of the vehicle increases.

  Therefore, it is an object of the present invention to overcome the above-mentioned problems and ensure an appropriate operating state of the range switching lever without causing a rise in manufacturing cost.

Firstly, the transmission according to the present invention is arranged outside a transmission case and a transmission body that transmits an operation force for the select lever, and the transmission body is connected to rotate the transmission body according to an operation on the select lever. The range switching lever is formed in the shape of a disc that is rotated around the center as a fulcrum.

  As a result, the disk-shaped range switching lever is rotated according to the operation of the select lever, so that snow does not stay on the rotation locus of the range switching lever.

  Secondly, in the above-described transmission according to the present invention, it is desirable that the transmission body is connected to the outer peripheral portion of the range switching lever.

  This increases the distance from the center of rotation of the range switching lever to the connection point of the range switching lever with the transmission body.

  Thirdly, in the above-described transmission according to the present invention, it is desirable that the range switching lever be formed with a recess in which a part of the transmission body is located.

  This avoids interference between the range switching lever and the transmission body.

  Fourthly, in the above-described transmission according to the present invention, an inhibitor switch that switches the range according to the rotational position of the range switching lever is provided, and the range switching lever covers the entire inhibitor switch from the side. It is desirable to be formed in a size to cover.

  As a result, the range switching lever has a snow protection function for the side surface of the inhibitor switch.

  According to the present invention, since the disk-shaped range switching lever is rotated in response to the operation on the select lever, snow does not stay on the rotation locus of the range switching lever, and the snow cover is provided. Therefore, the operation of the range switching lever can be prevented from being hindered, and the proper operating state of the range switching lever can be ensured without increasing the manufacturing cost.

2 to 7 show an embodiment of a vehicle transmission according to the present invention, which is a diagram showing a schematic configuration of a power transmission mechanism and the like in a vehicle. It is a figure which shows a range switching mechanism etc. It is a front view showing a range switching lever and the like. It is a figure of a range switching mechanism etc. which shows the state where the range switching lever was rotated. It is a side view showing a range switching lever and the like in which a recess is formed. It is a front view showing a range switching lever and the like in which a recess is formed. It is a side view showing the composition where the whole inhibitor switch is covered from the side by the range switching lever.

Hereinafter, an embodiment for carrying out a vehicle transmission of the invention will be described with reference to the accompanying drawings.

<Schematic configuration of power transmission mechanism, etc.>
First, a schematic configuration of a power transmission mechanism and the like provided in a vehicle having a transmission will be described (see FIG. 1).

  The vehicle 100 is, for example, a four-wheel drive (4WD) type, has an engine (internal combustion engine) 101 on the front end side, and the transmission 1 is connected to the engine 101 by a torque converter, a friction clutch, or the like (not shown). . When the vehicle 100 is an EV (Electric Vehicle), an HEV (Hybrid Electric Vehicle), a PHEV (Plug-in Hybrid Electric Vehicle), or the like, the engine 101 is used. Instead, or together with the engine 101, a motor is provided. The vehicle 100 may be a two-wheel drive (2WD) type.

  The transmission (transmission) 1 is provided with a planetary gear mechanism 102, an electronically controlled coupling 103, and the like inside a transmission case 2. The transmission 1 is provided with a range switching mechanism 3 on the outer surface (side surface) of the transmission case 2. A continuously variable transmission (CVT) may be used as an internal mechanism of the transmission 1. Further, an automatic transmission may be used as the transmission 1 or a manual transmission may be used.

  A front differential 104 is connected to the transmission 1. Left and right front wheel drive shafts 105 and 105 are connected to the front differential 104, and front wheels 106 and 106 are connected to the front wheel drive shafts 105 and 105, respectively. Therefore, the driving force of the engine 101 is transmitted to the front wheels 106, 106 via the front differential 104 and the front wheel drive shafts 105, 105.

  When the vehicle 100 is cornering, the front differential 104 absorbs the difference between the left and right rotational speeds of the front wheels 106, 106, and the same torque is transmitted from the engine 101 to the front wheels 106, 106.

  A propeller shaft 107 is connected to the rear end of the transmission 1. The driving force transmitted from the engine 101 to the transmission 1 is transmitted from the transmission 1 to the propeller shaft 107 to rotate the propeller shaft 107.

  The propeller shaft 107 is arranged so as to extend in the front-rear direction, and a rear differential 108 is connected to a rear end portion of the propeller shaft 107. Left and right rear wheel drive shafts 109 and 109 are connected to the rear differential 108, and rear wheels 110 and 110 are connected to the rear wheel drive shafts 109 and 109, respectively. Therefore, the driving force of the engine 101 transmitted to the propeller shaft 107 is transmitted to the rear wheels 110 and 110 via the rear differential 108 and the rear wheel drive shafts 109 and 109.

  When the vehicle 100 is cornering, the rear differential 108 absorbs the difference between the left and right rotational speeds of the rear wheels 110, 110, and the same torque is transmitted from the engine 101 to the rear wheels 110, 110.

<Structure of range switching mechanism, etc.>
Next, a specific configuration of the range switching mechanism 3 provided in the transmission 1 and a select lever that applies an operating force to the range switching mechanism 3 will be described (see FIGS. 2 to 4).

  The range switching mechanism 3 is arranged on the outer surface (side surface) side of the transmission case 2 as described above (see FIG. 2). The range switching mechanism 3 has a range switching lever 4, an inhibitor switch 5, and a transmitter 6.

  The range switching lever 4 is formed, for example, in a disk shape that faces the left-right direction, and is rotatably supported on the side surface of the transmission case 2 via a shaft 7 that serves as a rotation fulcrum (FIGS. 2 and 5). 3). The shaft 7 is connected to the center of the range switching lever 4, and the range switching lever 4 is rotated about the center. A support shaft portion 4a is provided on the outer peripheral portion of the outer side surface of the range switching lever 4.

  The inhibitor switch 5 is arranged between the side surface of the transmission case 2 and the range switching lever 4 (see FIG. 2). The inhibitor switch 5 is actuated by the rotation of the range switching lever 4, and has a function of switching the range according to the rotational position of the range switching lever 4. Therefore, when the inhibitor switch 5 outputs a signal corresponding to the rotational position of the range switching lever 4, the shift control and forward / backward control are performed.

  The transmission body 6 is a cable, a rod or the like, and the transmission body 6 connects the select lever 200 and the range switching lever 4. One end (rear end) of the transmission body 6 is provided as a cylindrical shaft support 6a, and the shaft support 6a is rotatably connected to the support shaft 4a of the range switching lever 4 ( 2 and 3). A boot 8 made of rubber or resin is attached to the rear end portion of the transmission body 6.

  The front portion of the boot 8 of the transmission body 6 is attached to the side surface of the transmission case 2 by a bracket 9 (see FIG. 2). The transmission body 6 is pressed from the outside by a bracket 9, and the bracket 9 is attached to the transmission case 2 by being coupled to the transmission case 2 with a bolt or the like.

  The select lever 200 is an operation unit that is operated by a driver to shift the vehicle 100 or move the vehicle forward or backward. By operating the select lever 200, for example, switching of ranges such as a parking range (P), a reverse range (R), a neutral range (N), a drive range (D), a second range (2), and a first range (1) can be performed. Done.

  When the select lever 200 is operated, the operating force for the select lever 200 is transmitted to the range switching lever 4 via the transmission body 6, and the range switching lever 4 is rotated according to the operation on the select lever 200 ( 2 and 4). When the range switching lever 4 is rotated, the range is switched by the inhibitor switch 5 in accordance with the rotational position of the range switching lever 4, and shift control and forward / backward control are performed. Further, when the select lever 200 is operated to the parking range (P) or the neutral range (N), the electric circuit in the inhibitor switch 5 is turned on and the engine can be started.

  When the vehicle 100 having the transmission 1 configured as described above travels on a snowy road or a snowmelt road in a state of remaining snow, the snow is bounced up toward the range switching mechanism 3, and the snow that is bounced and adhered is the inhibitor switch 5. There is a possibility of solidifying and staying on the side surface 5a of the range switching lever 4 side.

  At this time, since the inhibitor switch 5 is covered from the side by the range switching lever 4 except for a part, the side surface 5a of the inhibitor switch 5 is covered with snow on the portions 5b and 5c which are not covered by the range switching lever 4. Easy to solidify and stay. In particular, the boot 8 is located near the inhibitor switch 5, and when snow adheres to the upper side of the boot 8, the adhered snow is also adhered to the portion 5b of the inhibitor switch 5 and is likely to solidify and stay.

  When snow is accumulated on the side surface 5a of the inhibitor switch 5 as described above, when the range switching lever 4 is operated by operating the select lever 200, the range switching lever 4 is formed in a disk shape and has a central portion. Since it is rotated about the fulcrum, the range switching lever 4 does not interfere with the snow accumulated in the portions 5b and 5c.

  Further, since the range switching lever 4 is formed in a disc shape, even when the bounced snow adheres to the range switching lever 4, the snow is easily slipped off on the outer circumference 4b formed in the arc shape. ing.

  Therefore, the retention of the bounced snow on the side surface 5a of the range switching lever 4 is suppressed.

<Summary>
As described above, in the transmission 1, the transmission body 6 that transmits the operating force to the select lever 200, and the range switching lever that is connected to the transmission body 6 and that is rotated according to the operation on the select lever 200. 4 is provided, and the range switching lever 4 is formed in a disk shape that is rotated around the center as a fulcrum.

  Therefore, since the disc-shaped range switching lever 4 is rotated in response to the operation on the select lever 200, snow does not stay on the movement locus (rotation locus) of the range switching lever 4 and the snow cover. It is possible to prevent the operation of the range switching lever 4 from being hindered without providing the above, and it is possible to ensure an appropriate operating state of the range switching lever 4 without increasing the manufacturing cost.

  Further, since the proper operating state of the range switching lever 4 can be ensured without providing a snow cover, it is necessary to secure the proper operating state of the range switching lever 4 while ensuring the weight reduction of the vehicle 100. You can

  Further, since the transmission body 6 is connected to the outer peripheral portion of the range switching lever 4, from the shaft 7 which is the rotation center to the support shaft portion 4a which is the connection point of the range switching lever 4 with the transmission body 6. The distance becomes large, and the rotation angle of the range switching lever 4 can be increased while minimizing the size of the range switching lever 4.

  Furthermore, since the transmission body 6 is connected to the outer peripheral portion of the range switching lever 4, contact between the range switching lever 4 and the transmission body 6 or the boot 8 can be easily avoided, and the range switching mechanism 3 can be easily operated. It is possible to secure a smoother operating state.

<Other examples>
An example of the range switching lever 4 formed in the shape of a flat plate has been shown above, but for example, a recess 4c is formed in a part of the range switching lever 4, and a part of the transmission body 6 or the boot is formed in the recess 4c. It is also possible to arrange that a part of 8 is located (see FIGS. 5 and 6).

  By forming the concave portion 4c in the range switching lever 4, interference between the range switching lever 4 and the transmission body 6 or the boot 8 is avoided, and the transmission body 6 and the boot 8 are not in contact with the range switching lever 4. The contact between the range switching lever 4 and the transmission body 6 or the boot 8 can be avoided, and the smooth rotation operation of the range switching lever 4 can be ensured.

  Further, although the above description shows an example of the configuration in which the portion excluding a part of the inhibitor switch 5 is laterally covered by the range switching lever 4 formed in a disk shape, the range switching lever 4 It is also possible to increase the size of the range switching lever 4 so that the entire inhibitor switch 5 is covered from the side (see FIG. 7).

  As described above, the inhibitor switch 5 is entirely covered from the side by the range switching lever 4, so that the inhibitor switch 5 and the range switching lever 4 are located closest to each other, and snow is accumulated on the inhibitor switch 5. Since it becomes difficult, the configuration in which the entire range of the inhibitor switch 5 is laterally covered by the range switching lever 4 is extremely effective as a snow countermeasure for the range switching lever 4. Therefore, the entire range of the inhibitor switch 5 is covered from the side by the range switching lever 4, so that it is difficult for snow to stay on the inhibitor switch 5 and the proper operating state of the range switching lever 4 is ensured. You can

  Even when the inhibitor switch 5 is entirely covered from the side by the range switching lever 4, the transmission body 6 is connected to the outer periphery of the range switching lever 4 or the range switching lever is connected. It is also possible to adopt a configuration in which a concave portion 4c for avoiding interference with a part of the transmission body 6 and a part of the boot 8 is formed in a part of 4.

  DESCRIPTION OF SYMBOLS 1 ... Transmission, 4 ... Range switching lever, 4a ... Support shaft part (connection point), 4b ... Outer periphery, 4c ... Recessed part, 5 ... Inhibitor switch, 6 ... Transmission body, 7 ... Shaft (rotation center), 200 … Select lever

Claims (4)

A transmission body that transmits the operation force to the select lever,
A range switching lever that is arranged outside the transmission case and that is coupled with the transmission body and that is rotated in response to an operation on the select lever;
The range switching lever is formed in a disk shape that is rotated around the center as a fulcrum.
Vehicle transmission. The vehicle transmission according to claim 1, wherein the transmission body is connected to an outer peripheral portion of the range switching lever . The vehicle transmission according to claim 1, wherein the range switching lever has a recess in which a part of the transmission body is located . An inhibitor switch for switching the range according to the turning position of the range switching lever,
The vehicle transmission according to claim 1, 2 or 3, wherein the range switching lever is formed in a size that covers the entire inhibitor switch from the side .

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