JP5491236B2 - Transmission operating device for transmission - Google Patents

Description

  The present invention relates to a transmission operation device for a transmission that selects a desired gear position by rotating and axially moving a control shaft built in a housing.

  This type of shift operation device is configured to perform a select operation by turning or moving a control shaft, and is configured to restrict an operation range in the select operation.

  As a structure for restricting the operation range, for example, Patent Document 1 discloses a structure in which a stopper part for restricting the operation range is provided on the control shaft.

  Further, Patent Document 2 discloses a structure in which the rotation positioning mechanism of the control shaft is constituted by an inner lever having a detent mechanism built in the housing, and a stopper for preventing over-rotation is constituted by an integral part of the housing. Yes.

JP-A-9-32921 JP 2008-232262 A

  In Patent Document 1, since a stopper part is separately mounted on the control shaft, there is a problem that the number of assembling steps and the number of parts increase. Patent Document 2 is a structure for a shift function. On the other hand, for a select function, a function of returning to a neutral position without holding at each select position is required. Therefore, the structure of Patent Document 2 cannot be employed for the select function as it is.

  The present invention has been made in view of the above-described conventional situation, and provides a transmission operation device for a transmission that can avoid the problem of increase in the number of assembling steps and the number of parts without separately requiring a dedicated stopper part. The challenge is to do.

The invention of claim 1
The transmission operation is transmitted to a control shaft built in the housing via a transmission mechanism, and the control shaft is rotated and moved to select a desired gear position. A mechanism is included in the housing and has a selection mechanism for rotating or moving the control shaft. The selection mechanism is fixed to the rotation shaft and connected to the control shaft. A connecting portion; and a stopper portion that restricts a rotation angle in at least one direction of the connecting portion by contacting an abutting surface provided in the housing, and the housing incorporates the select mechanism. A first housing and a second housing coupled to the first housing, wherein the contact surface is flush with a mating surface of the second housing. It is characterized in that.

  According to the shift operation device for a transmission according to the first aspect of the present invention, the connection portion connected to the control shaft and the contact surface provided in the housing are brought into contact with each other in at least one direction of the connection portion. A stopper portion is provided that regulates the magnitude of the rotation angle, and thus the movement distance in one direction of the control shaft. For this reason, the position of the control shaft can be regulated, and there is no need to provide a dedicated stopper component as in the conventional structure in which the control shaft is provided with a stopper component, and the number of assembly steps and the number of components can be reduced.

Further, since the contact surface is formed flush with the mating surface of the second housing, the contact surface can be machined simultaneously with the mating process, and the contact surface can be provided without substantially increasing the number of processing steps. It is possible to improve the position accuracy of the control shaft.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a vehicle transmission according to a first embodiment of the present invention. FIG. 3 is a schematic plan view of a shift lever portion of the transmission. FIG. 5 is a cross-sectional side view (a cross-sectional view taken along line III-III in FIG. 4) of a select mechanism and a shift mechanism portion of the transmission. FIG. 3 is a cross-sectional plan view of a select mechanism portion of the transmission. It is a cross-sectional side view of the selection mechanism and shift mechanism portion of the transmission according to the second embodiment of the present invention. It is a top view of the mating part of the transmission by the said Example 2.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIGS. 1 to 4 are diagrams for explaining a shift operation device for an automobile transmission according to a first embodiment of the present invention.

  In the figure, reference numeral 1 denotes a manual transmission. The transmission 1 includes a clutch case 2 connected to an engine E, a transmission case (housing) 3 connected to the clutch case 2, and the transmission. A differential case 4 connected to the case 3 is provided.

  A clutch mechanism 2a is built in the clutch case 2, and a transmission mechanism 7 having an input shaft 5, an output shaft 6 and a plurality of transmission gear trains 7a, 7a,. .

  A differential mechanism 8 is built in the differential case 4. A drive gear 6 a fixed to the output side end of the output shaft 6 is engaged with the ring gear 8 a of the differential mechanism 8. The wheels 9, 9 are connected to the output shafts 8b, 8b of the differential mechanism 8 via axles 8c, 8c.

  The transmission 1 includes a shift operation device 10 that selects a desired shift speed, 1st to 5th speeds, or reverse by swinging a shift lever 10a of a driver's seat in the left-right direction and the front-rear direction. . The transmission gear train 7a is always meshed, and all the transmission gear trains 7a are free to rotate with respect to the input shaft or the output shaft at the neutral position. The gear train is fixed with respect to the input shaft and the output shaft.

  The transmission operating device 10 includes a control shaft 11 that is rotatable and axially movable in the transmission case 3, and is further disposed in the vertical direction, and the input shaft 5 in the transmission case 3. The three shift shafts 12 for selecting any one of the transmission gear trains 7a are arranged in parallel with the output shaft 6 and movable in the axial direction.

  Then, the speed change operation device 10 controls the selection mechanism 13 that selects any one of the shift shafts 12 by moving the control shaft 11 in the axial direction, and the shift shaft 12 selected by the selection mechanism 13. A shift mechanism 14 is provided for moving the shaft 11 in the axial direction by rotating the shaft 11 and fixing the gear train of a desired gear stage to the input shaft 5 and the output shaft 6.

  The shift mechanism 14 rotates the locking arm 19 fixed to the inner part of the transmission case by the rotation operation of the shift lever 11b fixed to the upper end portion of the control shaft 11. The claw portion 19 a of the locking arm 19 is selectively locked to the locking claw 12 a of any one of the shift shafts 12 by operating the selection mechanism 13. Note that a shift fork (not shown) of the selected shift shaft 12 is engaged with any gear train by the operation of the shift mechanism 14 so that power can be transmitted to the gear train.

  The select mechanism 13 is a select shaft disposed in a select cover 15 mounted in an opening 3a formed in the transmission case 3 in a direction perpendicular to the control shaft 11 and rotatable. (Rotating shaft) 16, a select inner lever 17 fixed to the select shaft 16, and a select outer lever 16 a fixed to an end portion of the select shaft 16 protruding outward from the select cover 15.

  The select inner lever 17 is formed with a connecting portion 17 a extending toward the control shaft 11, and the connecting portion 17 a is connected to a connecting recess 11 a formed on the control shaft 11.

  The select mechanism 13 includes a return mechanism 22 that returns the shift lever 10a to the neutral center position shown in FIG. The return mechanism 22 includes an arm portion 17b formed so as to rotate integrally with the connecting portion 17a, and projects downward from the top wall of the select cover 15 so as to be positioned on one side of the arm portion 17b. The support portion 15b and the return spring 21 are provided. A projection 17d is formed on the arm 17b. Both end portions 21a and 21a of the return spring 21 sandwich the support portion 15b and the projection portion 17d, whereby the select shaft 16 is biased to the position shown in FIG. 10a returns to the neutral center position shown in FIG. 2 when moved to the neutral position.

  Further, stopper portions 17c and 17c 'are formed on both end surfaces in the rotation direction of the arm portion 17b. A contact surface 15a is formed on the inner surface of the select cover 15 to face the stopper portion 17c so as to form a ridge in the vertical direction. A contact surface 15a 'is formed at a portion of the boss portion 15c that supports the control shaft 11 that faces the stopper portion 17c'.

  When the stopper portion 17c comes into contact with the contact surface 15a, the clockwise rotation angle of the select inner lever 17 in FIG. 3, and thus the range of movement of the control shaft 11 upward is restricted. Further, when the stopper portion 17c 'abuts against the abutment surface 15a', the rotation angle of the select inner lever 17 in the counterclockwise direction of FIG. 3 and thus the downward movement range of the control shaft 11 is restricted. The

  According to the first embodiment, when the shift lever 10a is swung left and right in FIG. 2, the select shaft 16 rotates left and right in FIG. 3, and the connecting portion 17a moves the control shaft 11 in the axial direction. As a result, the claw portion 19 a of the locking arm 19 is locked to the locking claw 12 a of any shift shaft 12. In this case, if the positional accuracy in the axial direction of the control shaft 11 and thus the claw portion 19a is low, the claw portion 19a may straddle over the two locking claws 12a and 12a, or, for example, the upper locking portion There is a concern that the claw 12a is displaced upward with respect to the claw 12a, and the locking area is reduced.

  In the first embodiment, when the select shaft 16 rotates in the left-right direction in FIG. 3, the stopper portion 17 c or 17 c ′ formed on the arm portion 17 b is used as a contact surface 15 a or 15 a formed on the inner wall of the select cover 15. Since the rotation angle of the select shaft 16 is regulated by contacting with the ′, the positional accuracy of the claw portion 19a in the axial direction can be improved.

  In the first embodiment, the stopper portions 17c and 17c ′ formed on the arm portion 17b constituting the return mechanism 22 that urges the select shaft 16 to the center position and the contact surface 15a formed on the inner wall of the select cover 15 are used. , 15a ′, the position accuracy is increased, and there is no need for a dedicated stopper part as in the conventional structure in which a stopper part is provided on the control shaft, and the number of assembling steps and the number of parts can be reduced.

  FIGS. 5 and 6 are diagrams for explaining a speed change operation device for a transmission according to Embodiment 2 of the present invention. In FIG. 5, the same reference numerals as those in FIG.

  In the first embodiment, since the contact surface 15a is provided on the inner wall surface of the select cover 15 that is a cast product, it is considered that the contact surface 15a needs to be machined to improve the positional accuracy. The second embodiment is an example in which the contact surface can be machined without increasing the number of processing steps, and the positional accuracy is increased.

  In the second embodiment, a protrusion 17f is integrally formed with the select inner lever 17, and a stopper 17e is formed at the tip of the protrusion 17f. The contact surface 3c with which the stopper portion 17e contacts is formed flush with the mating surface 3b of the transmission case (second housing) 3 coupled to the mating surface 15d of the select cover (first housing) 15. Has been. That is, the contact surface 3c is processed simultaneously with the machining of the mating surface 3b, so that the number of processing steps hardly increases. And since the positional accuracy of the contact surface 3c is high, the rotational angle accuracy of the select shaft 16, and thus the positional accuracy of the control shaft 11 in the axial direction can be further improved.

  In the above embodiment, the clockwise and counterclockwise rotation angles of the select shaft 16 are restricted. However, in the present invention, only one rotation angle may be restricted.

  In the above embodiment, the case where the control shaft 11 is moved in the axial direction by the rotation of the select shaft 16 has been described. However, in the present invention, the control shaft is rotated by the rotation of the select shaft so that the selection operation is performed. It can also be applied to

1 Transmission 3 Transmission case (second housing)
3b 2nd housing mating surfaces 3c, 15a, 15a ′ abutment surface 10 speed change operation device 11 control shaft 13 select mechanism 15 select cover (first housing)
16 Select axis (rotating axis)
17a Connecting part 17c, 17c ', 17e Stopper part

Claims (1)

In a transmission operation device for a transmission that transmits a speed change operation to a control shaft built in a housing via a transmission mechanism, and rotates and moves the control shaft to select a desired gear stage.
The transmission mechanism is included in the housing, and has a selection mechanism that rotates or moves the control shaft.
The select mechanism includes at least one of the connecting portion by contacting a rotating shaft, a connecting portion fixed to the rotating shaft and connected to the control shaft, and an abutting surface provided in the housing. A stopper portion that regulates the rotation angle in the direction,
The housing has a first housing containing the select mechanism, and a second housing coupled to the first housing,
The transmission operation device for a transmission , wherein the contact surface is formed flush with a mating surface of the second housing .

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