JP6217509B2 - Manual transmission - Google Patents

Description

  The present invention relates to a manual transmission, and more particularly to a manual transmission that enables an oblique shift.

  Conventionally, manual transmissions are disclosed in, for example, Japanese Unexamined Patent Application Publication No. 2009-299707 (Patent Document 1), Japanese Unexamined Patent Application Publication No. 2007-327513 (Patent Document 2) and Japanese Unexamined Patent Application Publication No. 59-79665 (Patent Document 3). ing.

JP 2009-299707 A JP 2007-327513 A JP 59-79665 A

  Patent Documents 1 to 3 disclose a configuration in which a chamfered portion is provided on the contact surface of the interlock plate that contacts the shift head so that the shift head easily enters between the interlock plates.

  In such a manual transmission, the chamfered portion of the interlock plate moves in the shift direction while rotating in the select direction by the driver's oblique shift operation. At this time, the interlock plate contacts the shift head while being tilted while rotating. For this reason, edge contact is likely to occur, and the required operating force may increase.

  Accordingly, the present invention has been made to solve the above-described problems, and an object thereof is to provide a manual transmission that can be operated with a small operating force.

  A manual transmission according to the present invention is a manual transmission provided with an interlock plate, the interlock plate being capable of abutting against a shift head, and the interlock plate being in a shift direction and a select direction. It has a chamfered portion that is inclined, and the chamfered portion is a manual transmission that is inclined so as to be separated from the shift head as it approaches the outer peripheral surface of the interlock plate.

  In the manual transmission configured as described above, the chamfered portion is inclined so as to be separated from the shift head as it approaches the outer periphery of the interlock plate, so that the interlock plate rotates and contacts the shift head. Even so, the shift head tends to move toward the outside of the interlock plate. As a result, the surface of the interlock plate and the shift head come into contact with each other smoothly, so that it is possible to reduce the operation load during the oblique operation.

  According to the present invention, a manual transmission that can be operated with a small operating force can be provided.

FIG. 2 is a perspective view showing a part of a manual transmission having an interlock plate according to the first embodiment. It is a front view which shows the interlock plate and shift head according to Embodiment 1. FIG. It is sectional drawing along the III-III line in FIG. It is a front view which shows the shift head contact | abutted to the taper surface of an interlock plate. It is sectional drawing along the VV line in FIG. It is sectional drawing along the VI-VI line in FIG. It is a front view which shows a shift head and the chamfering part of an interlock plate. It is a front view which shows the chamfering part of the interlock plate contact | abutted to a shift head. It is a top view which shows the shift pattern of a diagonal shift. It is a block diagram which shows the operation | movement of each part in diagonal shift.

  Hereinafter, embodiments will be described with reference to the drawings. In the following embodiments, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

(Embodiment 1)
FIG. 1 is a perspective view showing a part of a manual transmission having an interlock plate according to the first embodiment. Referring to FIG. 1, manual transmission 5 includes an interlock plate 10 and a shift inner lever 50 that moves while being guided in interlock plate 10.

  The interlock plate 10 can be rotated in the select direction. The interlock plate 10 prevents the shift inner lever 50 from engaging with the two shift heads.

  The shift inner lever 50 can move in the axial direction (shift direction) within the interlock plate 10. The shift inner lever 50 is engaged with one of the three shift heads 20, 30, 40.

  Each shift head 20, 30, 40 is connected to a fork shaft, and the fork shaft holds the shift fork. Shifting is performed by the shift heads 20, 30, and 40 moving in the shift direction.

  FIG. 2 is a front view showing the interlock plate and the shift head according to the first embodiment. 3 is a cross-sectional view taken along line III-III in FIG. With reference to FIGS. 2 and 3, the shift head 20 fits into the groove 19 of the interlock plate 10.

  A groove 19 extends from the inner peripheral surface 16 toward the outer peripheral surface 15, and the shift head 20 can move in the shift direction in the groove 19. Not only the shift head 20 but also the shift heads 30 and 40 can be fitted into the groove 19.

  When the interlock plate 10 is detached from the shift head 20, the interlock plate 10 can be rotated in the select direction indicated by the arrow SE. The shift head 20 can move in the shift direction indicated by the arrow SH.

  The interlock plate 10 is provided with a first chamfered portion 11 and a second chamfered portion 12, and each is inclined with respect to the shift direction and the select direction as shown in FIG. When the first chamfered portion 11 and the second chamfered portion 12 and the shift head 20 are in contact, if the shift head 20 moves in the shift direction, the interlock plate 10 moves in the select direction. Therefore, the shift lever moves in both the shift direction and the select direction.

  FIG. 4 is a front view showing the shift head that contacts the tapered surface of the interlock plate. FIG. 5 is a cross-sectional view taken along line VV in FIG. 4 and 5, when the shift head 20 is in contact with the first chamfered portion 11, the shift head 20 slides on the first chamfered portion 11 and moves in the shift direction. 10 moves in the select direction.

  6 is a cross-sectional view taken along line VI-VI in FIG. With reference to FIG. 6, the first chamfered portion 11 is inclined so that the distance D between the first chamfered portion 11 and the shift head 20 increases as the inner peripheral surface 16 approaches the outer peripheral surface 15. In the second chamfered portion 12 as well, it is preferable that the first chamfered portion 12 is inclined so that the distance D between the first chamfered portion 12 and the shift head 20 is increased as in FIG.

  FIG. 7 is a cross-sectional view showing the shift head and the chamfered portion of the interlock plate. FIG. 8 is a cross-sectional view showing a chamfered portion of the interlock plate that contacts the shift head. 7 and 8, the first chamfer 11 is chamfered as shown by a solid line. The two-dot chain line shows the interlock plate 10 according to the comparative example that is not chamfered toward the outer peripheral surface 15. When rotating in the select direction around the rotation shaft 190, in the example of the two-dot chain line that is not chamfered, the outer peripheral surface 15 of the interlock plate 10 contacts the shift head 30. In this case, the shift head 30 is moved in the shift direction. A large force is required to move it.

  On the other hand, when chamfering is performed as indicated by the solid line, the shift head 30 and the interlock plate 10 abut at a position away from the outer peripheral surface 15. In this case, the shift head can be moved without the shift head 30 being caught by the interlock plate.

FIG. 9 is a plan view showing a shift pattern of the oblique shift. FIG. 10 is a block diagram showing the operation of each part in the oblique shift. When performing oblique operation from the second shift position (2ND) to the third speed (3RD), rotate the interlock Plate selecting the select locations. Thereafter, the odd or even stage is selected by moving the shift inner lever .
In this case, the region where the oblique shift is possible shown in FIG. 9 is determined by the chamfered shapes of the interlock plate, the shift head, and the shift inner lever. When there is no chamfering, only the movement of the shift pattern 1 is possible.

  When performing an oblique shift from the second speed to the third speed, a moment in the select direction is input to the interlock plate, and the interlock plate and the shift head come into contact with each other. The interlock plate stops rotating in the select direction. The shift head moves in the neutral direction (select direction). At this time, friction is generated between the shift head and the interlock plate.

  When the shift head moves on the first chamfered portion of the interlock plate, the interlock plate further rotates in the select direction. Along with the rotation, the contact point between the interlock plate and the shift head changes, resulting in an edge contact between the interlock plate and the shift head (see the two-dot chain line in FIG. 8). As a result, an increase in operation load and a decrease in the diagonally shiftable area occur. Specifically, only the oblique shift indicated by the dotted line 2 is possible in FIG.

  However, if the chamfered portion is chamfered toward the inner peripheral surface 16, contact between the interlock plate 10 and the shift head 30 on the outer peripheral surface 15 can be avoided as shown in FIG. As a result, an oblique shift is possible as indicated by the alternate long and short dash line 3.

  That is, as shown in FIG. 10, when the oblique shift is started (step 1001), the shift head and the first chamfered portion of the interlock plate come into contact (step 1002).

  In the structure according to the comparative example, the front end of the interlock plate and the shift head edge portion contact each other (step 1003). As a result, the amount of rotation of the interlock plate is reduced. Furthermore, it becomes a point contact and a catching load is generated. As a result, operability is deteriorated (step 1004).

  On the other hand, in the structure according to the embodiment, the chamfered portion of the interlock plate contacts the shift head until the shift is completed (step 1005). As a result, the amount of rotation of the interlock plate increases. Furthermore, no catching load is generated. As a result, the oblique operability is improved (step 1006).

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention can be used in the field of manual transmissions.

  1 shift pattern, 5 manual transmission, 10 interlock plate, 11 first chamfered portion, 12 second chamfered portion, 15 outer peripheral surface, 16 inner peripheral surface, 19 groove, 20, 30, 40 shift head, 50 inner Lever, 190 axis of rotation.

Claims (1)

A manual transmission with an interlock plate,
The interlock plate is provided with a groove extending from the inner peripheral surface toward the outer peripheral surface, and the interlock plate can contact the shift head,
The interlock plate has a chamfered portion inclined with respect to the shift direction and the select direction ,
The chamfered portion is inclined so as to be separated from the shift head as it approaches the outer peripheral surface of the interlock plate,
The chamfered portion has first and second chamfered portions, and an angle formed between the second chamfered portion and the shift direction is larger than an angle formed between the first chamfered portion and the shift direction. ,
A manual transmission in which a distance between the second chamfered portion and the groove is larger than a distance between the first chamfered portion and the groove .

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