JP2007196914A - Parking mechanism, transmission with parking mechanism, and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure assembling work efficiency, even when each part composing a parking mechanism is arranged in a separate case. <P>SOLUTION: This transmission is constituted by assembling the first case and the second case. The transmission is provided with a manual plate 23 arranged in the first case rotated by interlocking with an operation of a shift lever, a parking rod 24 oscillatably connected to the manual plate 23 axially moved according to rotation of the manual plate 23, a cam guide means guiding axial moving of a cam part 24c provided at a distal end of the parking rod 24 and arranged on the second case having a cam face into which the cam part 24c runs, a parking pole 26 arranged on the second case to be engaged to the parking gear by being energized by the cam part 24c running into the cam face, and an oscillation prevention means capable of preventing oscillation including the axial moving of the parking rod 24 when assembling the first case and the second case. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a parking mechanism, a transmission including the parking mechanism, and a manufacturing method thereof.

Conventionally, as this type of transmission, one having a parking mechanism that mechanically prevents rotation of an output shaft in order to maintain the position of a parked vehicle has been proposed. In this transmission, when the shift lever is selected in the P range, the parking rod with the cam formed at the tip moves in the axial direction, the cam rides on the support actuator, and the parking pole having the pawl intersects the axial direction. The output shaft is prevented from rotating by moving in the direction and engaging the pawl with a parking gear provided on the output shaft.
Japanese Patent No. 3606714

  By the way, in such a transmission, the parts constituting the parking mechanism are generally arranged in the same case. However, in recent years, the demand for downsizing of the transmission has increased, and due to layout constraints, these parts have been arranged. May have to be arranged in separate cases, resulting in a problem that the assemblability deteriorates. In particular, when the parking rod, the parking gear, and the support actuator are arranged in separate cases, the assembling performance is significantly deteriorated.

  An object of the parking mechanism, the transmission including the parking mechanism, and the manufacturing method thereof according to the present invention is to ensure assemblability even when the respective parts constituting the parking mechanism are arranged in separate cases.

  The transmission of the present invention employs the following means in order to achieve the above-described object.

  The parking mechanism of the present invention is swingable to a manual plate disposed in a first case that rotates in conjunction with operation of a shift lever, and to the manual plate that moves in the axial direction as the manual plate rotates. A cam guide means disposed on a second case having a cam surface which guides the axial movement of the cam rod provided at the leading end of the parking rod connected to the parking rod, and the cam portion rides on the cam; When assembling the parking pole disposed in the second case, which is urged by the cam portion that rides on the surface and engages with the parking gear, and the first case and the second case, the shaft of the parking rod The gist of the present invention is to provide a swing preventing means capable of preventing swing including direction movement.

  A transmission according to the present invention is a transmission in which a first case and a second case are assembled, and includes a manual plate disposed in the first case that rotates in conjunction with an operation of a shift lever, and the manual A parking rod that is swingably connected to the manual plate that moves in the axial direction as the plate rotates, and guides the axial movement of the cam portion provided at the tip of the parking rod, and the cam portion rides up. Cam guide means disposed in the second case having a cam surface; a parking pole disposed in the second case that is urged by the cam portion riding on the cam surface and engages a parking gear; Rocking prevention means capable of preventing rocking including axial movement of the parking rod when the first case and the second case are assembled. The the gist.

  The transmission manufacturing method of the present invention includes (a) a step of assembling a manual plate that rotates in conjunction with the operation of a shift lever, and (b) an axial direction along with the rotation of the manual plate. (C) a cam having a cam surface that guides the axial movement of the cam portion provided at the tip of the parking rod and rides on the cam portion. Assembling the guide means to the second case; and (d) assembling a parking pole that is urged by the cam portion riding on the cam surface and engages the parking gear to the second case, and (e). (F) preventing the rocking including the axial movement of the parking rod; and (f) preventing the rocking of the parking rod. Part is summarized in that and a step of assembling the said first case and said second case so as to be positioned between said cam guide means and the parking pawl.

  The parking mechanism of the present invention can prevent the parking rod from swinging by the swing preventing means when the first case and the second case are assembled. Even when the respective parts constituting the mechanism are arranged in separate cases, it is possible to achieve an effect that the assembling property can be ensured.

  In the transmission according to the present invention, the swing of the parking rod can be prevented by the swing preventing means when the first case and the second case are assembled, and therefore, the transmission is connected to the manual plate disposed in the first case. The operation of assembling the cam portion of the parking rod so that it is located between the cam guide means arranged in the second case and the parking pole becomes easy. That is, even when the parts constituting the parking mechanism are arranged in separate cases, the assembling property can be ensured.

  In the method for manufacturing a transmission according to the present invention, the swing of the parking rod can be prevented by the swing preventing means when the first case and the second case are assembled. The operation of assembling the cam portion of the connected parking rod so as to be positioned between the cam guide means arranged in the second case and the parking pole becomes easy. That is, even when the parts constituting the parking mechanism are arranged in separate cases, the assembling property can be ensured.

In such a transmission according to the present invention, the swing preventing means includes a rotation preventing means for preventing the manual plate from rotating, and a rod end opposite to the cam portion of the parking rod. It may be a means having an insertion hole for preventing the parking rod from swinging with respect to the manual plate.
In this way, the rotation of the parking rod can be prevented by preventing the rotation of the manual plate by the rotation preventing means, and the parking rod can be prevented from swinging with respect to the manual plate by the insertion hole. The operation of assembling the cam portion of the parking rod connected to the manual plate so as to be positioned between the cam guide means arranged in the second case and the parking pole becomes easy. That is, even when the parts constituting the parking mechanism are arranged in separate cases, the assembling property can be ensured.

In the transmission of the present invention having the rotation prevention means and the insertion hole, the rotation prevention means is a detent mechanism capable of positioning the manual plate at a position corresponding to a shift position, and the insertion hole When the manual plate is positioned at a swing prevention position other than the position corresponding to the shift position by the detent mechanism, the rod end portion can be inserted.
In this way, the rod end can be inserted into the insertion hole when the manual plate is positioned at the anti-swing position other than the position corresponding to the shift position by the detent mechanism. Oscillation can be prevented. In this case, the detent mechanism may be configured such that the rocking prevention position is set outside a normal operating range in which the manual plate rotates corresponding to the shift position. In this way, the rotation of the manual plate is not prevented within the normal operating range of the manual plate.

In the transmission of the present invention in which the swing prevention position is set outside the normal operating range of the manual plate, the detent mechanism can prevent the manual plate from rotating beyond an allowable rotation angle. The insertion hole may be formed so that the rod end can be inserted when the manual plate abuts against the stopper.
In this way, when the rod end is inserted into the insertion hole, the stopper can prevent the manual plate from rotating outside the allowable rotation angle, and when the rod end is not inserted into the insertion hole, the rod When the end portion comes into contact with the first case, the manual plate can be prevented from rotating outside the allowable rotation angle.

  Next, the best mode for carrying out the present invention will be described using examples.

FIG. 1 is a cross-sectional view showing a main part of an example of a transmission 1 incorporating a parking mechanism 20 according to an embodiment of the present invention.
As shown in FIG. 1, the parking mechanism 20 of the embodiment is connected to the select lever 2 via a wire 3, and is operated by the select operation to the parking position P of the select lever 2 to rotate the output shaft 4. regulate.

  As shown in FIG. 1, the parking mechanism 20 according to the embodiment includes a manual lever 21 that is connected to the wire 3 and rotates when the select lever 2 is selected, and a manual shaft 22 that rotates when the manual lever 21 rotates. A link mechanism portion comprising a manual plate 23 attached to the manual shaft 22 so as to be integrally rotatable, and a parking rod 24 that is swingably connected to the manual plate 23 and slides in the axial direction as the manual plate 23 rotates. L, a support actuator 25 for guiding the sliding of the parking rod 24 in the axial direction, and an engagement with the teeth of the parking gear PG fixed to the output shaft 4 by operating in accordance with the sliding of the parking rod 24 in the axial direction. And a parking pole 26.

  A boss portion 11a is formed on the outer peripheral surface of the case 11 of the transmission 1 in a direction perpendicular to the axial direction of the output shaft 4, and the manual shaft 22 is inserted into a through hole 11a ′ formed in the boss portion 11a. Inserted and rotatably supported. A manual lever 21 is fixed to the manual shaft 22 on the outside of the case 11, and a manual plate 23 is fixed on the inside of the case 11. That is, the link mechanism portion L is attached and arranged on the case 11 side via the manual shaft 22.

FIG. 2 is an enlarged view of the periphery of the manual plate 23 in an enlarged manner.
As shown in the figure, the manual plate 23 is formed in a substantially V shape with a mounting portion 23a to which the manual shaft 22 is attached as a bending point, and one end of the manual plate 23 is formed with a connection hole 23b 'for connecting the parking rod 24. It is comprised as the part 23b, and the other end is comprised as the positioning part 23c in which positioning groove | channel 23c 'was formed.

  The positioning groove 23c ′ is formed corresponding to each shift position, for example, a parking position P, a reverse position R, a neutral position N, and a drive position D. In the embodiment, P, R, N and D are formed along the rotation direction. A notch 23d is formed at the end of the positioning portion 23c opposite to the connecting portion 23b, that is, the end of the positioning groove 23c ′ corresponding to the drive position D. This is configured as a rocking prevention position S for preventing the parking rod 24 from rocking. Further, the case 11 is provided with a detent spring 27 that can be engaged with and detached from the positioning groove 23c 'and the notch 23d. The positioning groove 23c 'of the positioning unit 23 and the detent spring 27 constitute a detent mechanism DT.

  Further, the case 11 is provided with a stopper 11b that abuts the end surface 23b ″ of the connecting portion 23b of the manual plate 23 on the side opposite to the positioning portion 23c to restrict the rotation of the manual plate 23, and the manual plate 23 An insertion hole 11c is formed into which a free end 24f of a parking rod 24 described later can be inserted when 23 is in contact with the stopper 11b.

  As shown in FIGS. 1 and 2, the parking rod 24 is formed of a straight portion 24a and a crank portion 24b, and the crank portion 24b is inserted into the connecting hole 23b ′ of the connecting portion 23b of the manual plate 23 to swing. It is connected freely. A cam portion 24c is formed on one end side of the linear portion 24a of the parking rod 24, and a caulking portion 24d is formed between the cam portion 24c and the crank portion 24b, and the cam portion 24c and the caulking portion 24d. A compression spring 24e is interposed therebetween. The other end is formed as a free end 24f.

FIG. 3 is a cross-sectional view showing a cross section taken along the plane AA of the transmission 1 of FIG.
As shown in FIGS. 2 and 3, the support actuator 25 includes a guide portion 250 formed in an arc shape within a predetermined angle range, for example, a substantially U shape, and is a housing that is attached and fixed by the case 11 and bolts. It attaches and fixes to the end surface 12a which faces 12 cases 11 with a volt | bolt. An inclined surface 250 a on which the cam portion 24 c of the parking rod 24 rides is formed on the case 11 side end surface of the guide portion 250.

  As shown in FIGS. 2 and 3, the parking pole 26 includes a guide portion 260 that forms a guide passage 200 that guides the parking rod 24 between the guide portion 250 of the support actuator 25 and a tooth portion of the parking gear PG. An engaging claw portion 261 is formed, and is rotatably supported by a pole shaft 30 that is press-fitted and fixed in a press-fitting hole 12 b formed in the end surface 12 a of the housing 12. An inclined surface 260 a on which the cam portion 24 c of the parking rod 24 rides is formed on the end surface of the guide portion 260 on the case 11 side. The pole shaft 30 is provided with a coil spring 31. The parking pole 26 is always urged by the coil spring 31 in a direction in which the claw portion 261 is separated from the tooth portion of the parking gear PG. The pole shaft 30 is inserted into a rotation hole 11d formed in the case 11 in a state where the housing 12 is attached and fixed to the case 11, and supports the parking pole 26 at both ends.

Next, the operation of the parking mechanism 20 configured as described above, particularly the operation when the parking mechanism 20 is assembled to the transmission 1 will be described.
FIG. 4 is a state explanatory view showing a state when the parking mechanism 20 is assembled to the transmission 1.
When the parking mechanism 20 is assembled to the transmission 1, as shown in the drawing, the manual plate 23 is rotated via the manual lever 21 until the end surface 23b '' of the connecting portion 23b comes into contact with the stopper 11b, thereby causing the parking rod 24 to rotate. The free end 24f is inserted into the insertion hole 11c, and the detent spring 27 is engaged with the notch 23d to set the swing prevention position S. As a result, the parking rod 24 is prevented from swinging including axial movement. That is, the swinging of the link mechanism portion L attached to the case 11 side of the transmission 1 is temporarily fixed to the case 11.

  When the case 11 and the housing 12 are assembled in such a state, the tip of the cam portion 24c of the parking rod 24 is connected to the guide portion 250 of the support actuator 25 and the guide portion 260 of the parking pole 26 which are attached to the housing 12 side. It is arranged at a position facing the formed guide passage 200. When the manual lever 21 is rotated from this state until the free end 24f of the parking rod 24 comes out of the insertion hole 11c, that is, until the detent spring 27 is engaged with the positioning groove 23c ′ corresponding to the drive position D, the cam The tip of the portion 24c is easily inserted into the guide passage 200, and the assembly of the parking mechanism 20 to the transmission 1 is completed.

  According to the parking mechanism 20 of the embodiment described above, the free end 24f of the parking rod 24 is inserted into the insertion hole 11c formed in the case 11 when the manual plate 23 comes into contact with the stopper 11b that restricts the rotation of the manual plate 23. The parking rod 24 is inserted to prevent swinging, and the detent spring 27 is engaged with a notch 23d formed at a position corresponding to the swing preventing position S of the positioning portion 23c of the manual plate 23 to Since the rotation, that is, the movement of the parking rod 24 in the axial direction is prevented, the support actuator 25 and the parking pole 26 which are attached and arranged on the housing 12 side which is a different member from the case 11 to which the parking rod 24 is attached and arranged. Guide thread formed Easy to insert the parking rod 24 to 200. That is, even when the respective parts constituting the parking mechanism 20 are separately arranged in the case 11 and the housing 12, the assembling property can be facilitated.

  In the parking mechanism 20 of the embodiment, when the end surface 23b ″ of the connecting portion 23b of the manual plate 23 abuts against the stopper 11b, the detent spring 27 engages with the notch portion 23d, and the manual plate 23 is brought into the swing prevention position S. In addition to positioning, the free end 24f of the parking rod 24 is inserted into the insertion hole 11c, but the detent spring 27 is notched before the end surface 23b '' of the connecting portion 23b of the manual plate 23 abuts against the stopper 11b. The manual plate 23 may be engaged with the portion 23d to position the manual plate 23 at the rocking prevention position S, and the free end 24f of the parking rod 24 may be inserted into the insertion hole 11c. In this case, the stopper 11b is a case where the manual plate 23 comes into contact with the end surface 23b '' of the connecting portion 23b of the manual plate 23 at a position rotated further than the rotation angle at which the manual plate 23 is positioned at the anti-swing position S by the detent mechanism DT. 11 may be provided.

  In the parking mechanism 20 of the embodiment, both the support actuator 25 and the parking pole 26 are attached to the housing 12 side. However, only one of the support actuator 25 and the parking pole 26 is on the housing 12 side. It does not matter if it is mounted and arranged.

  In the parking mechanism 20 of the embodiment, the link mechanism portion L is attached and arranged on the case 11 side, and the support actuator 25 and the parking pole 26 are attached and arranged on the housing 12 side. L may be attached and disposed on the housing 12 side, and the support actuator 25 and the parking pole 26 may be attached and disposed on the case 11 side. Further, the case 11 and the adapter plate, not the case 11 and the housing 12, such as the case 11 and the adapter plate, may be anything as long as the respective parts constituting the parking mechanism 20 are attached and arranged at different locations.

  In the parking mechanism 20 of the embodiment, the stopper 11b is formed on the case 11, but the stopper 11b may be formed on the manual plate 23 side.

  As mentioned above, although embodiment of this invention was described using the Example, this invention is not limited to such an Example, In the range which does not deviate from the summary of this invention, it can implement with a various form. Of course.

It is principal part sectional drawing which showed the principal part of an example of the transmission incorporating the parking mechanism as one Embodiment of this invention. It is the periphery enlarged view which expanded and showed the manual plate periphery. It is sectional drawing which shows the cross section of the AA plane of the transmission of FIG. It is a state explanatory view showing a state when the parking mechanism is assembled to the transmission.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transmission 2 Select lever 3 Wire 4 Output shaft 11 Case 11 'Through-hole 11a Boss part 11a' Through-hole 11b Stopper 11c Insertion hole 11d Rotation hole 12 Housing 12a End surface 12b Press-fit hole 20 Parking mechanism 21 Manual lever 22 Manual shaft 23 Manual Plate 23a Mounting part 23b Connecting part 23b 'Connecting hole 23b''End face 23c Positioning part 23c' Positioning groove 23d Notch part 24 Parking rod 24a Linear part 24b Crank part 24c Cam part 24d Caulking part 24e Compression spring 24f Free end 25 Support actuator 26 Parking pole 27 Detent spring 30 Pole shaft 31 Coil spring 200 Communication path 250 Guide portion 250a Inclined surface 260 Guide portion 260a Inclined Surface 261 pawl portion D drive position DT detent mechanism L linkage mechanism N neutral position P parking position PG parking gear R reverse position S rocking motion preventing position

Claims (7)

A transmission comprising a first case and a second case assembled,
A manual plate disposed in the first case that rotates in conjunction with the operation of the shift lever;
A parking rod swingably connected to the manual plate that moves axially as the manual plate rotates;
Cam guide means disposed in the second case for guiding the axial movement of the cam portion provided at the tip of the parking rod and having a cam surface on which the cam portion rides;
A parking pole disposed in the second case that is urged by the cam portion riding on the cam surface and engages a parking gear;
Rocking prevention means capable of preventing rocking including axial movement of the parking rod when assembling the first case and the second case;
A transmission comprising:   The swing preventing means includes a pivot preventing means for preventing the manual plate from pivoting and a rod end portion of the parking rod opposite to the cam portion to insert the parking rod with respect to the manual plate. The transmission according to claim 1, wherein the transmission has an insertion hole for preventing movement. The rotation preventing means is a detent mechanism capable of positioning the manual plate at a position corresponding to a shift position,
The speed change according to claim 2, wherein the insertion hole is formed so that the rod end portion can be inserted when the manual plate is positioned at a rocking prevention position other than the position corresponding to the shift position by the detent mechanism. Machine.   The transmission according to claim 3, wherein the detent mechanism is configured such that the swing prevention position is set outside a normal operation range in which the manual plate rotates corresponding to the shift position. The detent mechanism has a stopper capable of preventing the manual plate from rotating beyond an allowable rotation angle,
The transmission according to claim 4, wherein the insertion hole is formed so that the rod end portion can be inserted when the manual plate abuts against the stopper. (A) assembling a manual plate that rotates in conjunction with the operation of the shift lever to the first case;
(B) a step of pivotally connecting a parking rod that moves in the axial direction with the rotation of the manual plate to the manual plate;
(C) assembling a cam guide means having a cam surface on which the cam portion rides on the second case while guiding the axial movement of the cam portion provided at the tip of the parking rod;
(D) assembling a parking pole, which is urged by the cam portion riding on the cam surface and engaged with a parking gear, to the second case;
(E) preventing the swing including the axial movement of the parking rod;
(F) assembling the first case and the second case so that the cam portion is positioned between the cam guide means and the parking pole in a state in which the swinging of the parking rod is prevented;
A method of manufacturing a transmission comprising: A manual plate disposed in the first case that rotates in conjunction with the operation of the shift lever, a parking rod that is swingably connected to the manual plate that moves in the axial direction as the manual plate rotates,
Cam guide means disposed in a second case for guiding the axial movement of a cam portion provided at the tip of the parking rod and having a cam surface on which the cam portion rides;
A parking pole disposed in the second case that is urged by the cam portion riding on the cam surface and engages a parking gear;
Rocking prevention means capable of preventing rocking including axial movement of the parking rod when assembling the first case and the second case;
A parking mechanism comprising:

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