JP5366862B2 - Shifting mechanism of automatic transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the assembling efficiency of a shift operation mechanism and to improve the quality of products. <P>SOLUTION: A shift operation mechanism of an automatic transmission includes: a detent plate 12, which integrally rotates with a manual shaft 11; a manual valve rod 20, whose root side end 20b is engaged with the detent plate 12 and whose tip end 20a is engaged with a manual valve 30 by being inserted into the insertion hole 31 of the manual valve; and a valve body 40, which accommodates the manual valve 30. Bosses 42, 43 for restraining the deflection of the manual valve rod 20 are provided on the upper surface 40a of the valve body 40. By shifting the valve body 40 upward when the valve body 40 is assembled at the lower side of the detent plate 12 and the manual valve rod 20, the deflections of the manual valve rod 20 to the right and left are restrained by the bosses 42, 43, while the tip end 20a of the manual valve rod 20 is inserted into the insertion hole 31 of the manual valve 30. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a shift operation mechanism of an automatic transmission provided with a rod member that moves a manual valve forward and backward by swinging as a detent plate rotates, and more particularly to an improvement for improving the assembly efficiency.

  A vehicle equipped with an automatic transmission is provided with a speed change mechanism for changing a hydraulic pressure supply destination in response to a driver's shift lever operation. This type of shift operation mechanism includes a manual shaft that rotates in conjunction with the driver's shift lever operation, a detent plate that is fixed to the manual shaft and rotates integrally, and one end engaged with the detent plate, And a rod member having the other end connected to the manual valve. Then, when the manual shaft and the detent plate are rotated in accordance with the operation of the shift lever, the rod member engaged with the detent plate is swung, and the rocking movement causes the manual valve connected to the tip of the rod member to move. The hydraulic oil supply destination is switched by moving back and forth (sliding) in the valve body.

JP-A-9-142167

  In the conventional speed change operation mechanism, in the assembly process, the manual valve and the manual valve rod are assembled in advance and installed on the valve body side. On the other hand, a detent plate is attached to the transmission case side. Then, the end of the manual valve rod is inserted into the engagement hole of the detent plate by moving the valve body toward the detent plate on the transmission case side, and the manual valve rod is assembled to the detent plate. .

  However, in such a structure, it is necessary to secure a working space for assembling the manual valve rod to the detent plate. Since the end of the manual valve rod is engaged with the engagement hole of the detent plate by moving the control body, the visibility of the end of the manual valve rod and the engagement hole of the detent plate is ensured. Assembly work needs to be done. Further, since the engagement hole of the detent plate has a small size, there is a problem that the efficiency of the operation of engaging the end portion of the manual valve rod is poor and the assembly efficiency of the speed change operation mechanism is not very good. Furthermore, if the end portion of the manual valve rod cannot be securely engaged with the engagement hole of the detent plate, there is a problem that unassembly or misassembly occurs, and improvement of product quality is hindered.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a shift operation mechanism of an automatic transmission that can improve assembly efficiency and product quality.

  The present invention for solving the above-described problems includes a manual shaft (11) that rotates in conjunction with a shift lever operation, and a detent that is fixed to the manual shaft (11) and rotates integrally with the manual shaft (11). The plate (12) and the base end (20b) are engaged with the detent plate (12), and the tip (20a) is inserted and engaged with the insertion portion (31) provided in the manual valve (30). A rod member (20) that moves the manual valve (30) forward and backward by swinging with the rotation of the detent plate (12), and a valve body (40) in which the manual valve (30) is housed. , A speed change operation mechanism (1) for an automatic transmission comprising a restricting portion (42, 43) for restricting a swing width by contacting the rod member (20). When the bubody (40) is assembled to the side of the detent plate (12) and the rod member (20), the swinging width of the rod member (20) is restricted by the restriction portions (42, 43), and the rod member (20) The distal end portion (20a) is inserted into the insertion portion (31) of the manual valve (40).

  According to the speed change operation mechanism of the automatic transmission according to the present invention, the restricting portion that restricts the swing width by contacting the rod member is provided, and when the valve body is assembled to the side of the detent plate and the rod member, the restricting portion With this configuration, the rod member swing width is regulated so that the tip of the rod member is inserted into the insertion portion of the manual valve. Therefore, the tip of the rod member is moved to the manual valve as the valve body is assembled. These can be inserted and engaged with each other. Therefore, the efficiency of the assembly operation of the speed change operation mechanism can be improved. In addition, the rod member swing width is restricted by the restricting portion, and the tip end portion of the rod member is inserted into the manual valve insertion portion. Therefore, in assembling the speed change operation mechanism, the rod member tip portion and the manual valve are inserted. It is not always necessary to ensure the visibility with the parts and the work space for assembling them. Therefore, the assembly work can be facilitated. Also, the assembly work can be automated. Furthermore, since the distal end portion of the rod member can be reliably inserted and engaged with the insertion portion of the manual valve, it is possible to avoid the occurrence of unassembly and misassembly, and to improve the quality of the product. .

  In the above speed change operation mechanism, the restricting portion (42, 43) includes a pair of projecting portions (42, 43) provided on the surface (40a) of the valve body (40) on the rod member (20) side, When the valve body (40) is assembled to the side of the detent plate (12) and the rod member (20), the rod body (20) is moved by moving the valve body (40) toward the rod member (20). It is good to arrange | position between a pair of protrusion parts (42, 43) so that the deflection | deviation of this rod member (20) may be controlled. According to this configuration, as the valve body is assembled to the side portion of the detent plate and the rod member, the deflection of the rod member is restricted, and the tip end portion of the rod member is inserted into the insertion portion of the manual valve. Become. Therefore, the efficiency of the assembly operation of the speed change operation mechanism can be further improved.

Further, in the above speed change operation mechanism, at least one of the insertion portion (31) of the manual valve (30) and the distal end portion (20a) of the rod member (20) includes the insertion portion (31) or the distal end portion (20a). Chamfered portions (32, 22) formed by chamfering the rod member (20) with a swing width within a range in which the rod member (20) is regulated by the regulating portions (42, 43). The shape or size of the chamfered portions (32, 22) may be set so that the distal end portion (20a) is inserted into the insertion portion (31) of the manual valve (30). According to this, if the deflection width of the rod member is regulated by the regulating part, the distal end part of the rod member is reliably inserted into the insertion part as the valve body moves. Therefore, the efficiency of the assembly operation of the speed change operation mechanism can be further improved. In addition, since it is possible to more reliably avoid the occurrence of unassembled or misassembled, it is possible to further improve the quality of the product.
In addition, the code | symbol in said parenthesis shows the code | symbol of the component in embodiment mentioned later as an example of this invention.

  According to the shift operation mechanism of the automatic transmission according to the present invention, it is possible to improve assembly efficiency and product quality.

It is a schematic perspective view which shows the internal structure of the automatic transmission provided with the speed change operation mechanism concerning one Embodiment of this invention. (A) is a schematic top view which shows the movable range of a manual valve rod, (b) is the A partial enlarged view of (a), and the positional relationship of the front-end | tip part of a manual valve rod and the insertion hole of a manual valve FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic perspective view showing an internal structure of an automatic transmission having a speed change operation mechanism according to an embodiment of the present invention. In the drawing, a part of a transmission case 2 described later is shown in a cut state. Further, in the following description, the terms “upper and lower, left and right, and horizontal direction” refer to the upper and lower, left and right, and horizontal directions in the state shown in FIG. A speed change operation mechanism 1 shown in FIG. 1 is installed inside a transmission case 2, and a manual shaft 11 that rotates about an axis in conjunction with an operation of a shift lever (not shown) by a driver, and the manual shaft 11. , A detent plate 12 that rotates together with the manual shaft 11, a manual valve rod (rod member) 20 having a base end 20b engaged with the detent plate 12, and a manual valve rod. The manual valve 30 is engaged with the distal end portion 20a of the 20 and the valve body 40 in which the manual valve 30 is housed so as to be movable back and forth. The manual valve rod 20 is a member that outputs the shift lever input range to the manual valve 30 by swinging as the detent plate 12 rotates.

  The manual shaft 11 is installed in the transmission case 2 with its axial direction facing up and down, and a flat plate-shaped detent plate 12 is fixed to the lower end of the manual shaft 11. A detent portion 12 a is formed on the outer periphery of the detent plate 12. The detent portion 12a has a plurality of irregularities corresponding to each range in which the shift lever is inserted. A detent roller 14 urged toward the detent plate 12 by a coil spring 13 is in elastic contact with the detent portion 12a. Thereby, when the detent plate 12 rotates in the horizontal plane with the rotation of the manual shaft 11, the detent roller 14 sequentially engages with the recesses of the detent portion 12a, so that the manual shaft 11 rotates by a predetermined angle. It is like that.

  Further, the detent plate 12 is provided with an engagement hole 12b for engaging the end portion 20b on the base side of the manual valve rod 20. The engaging hole 12b engages the end 20b on the base side of the manual valve rod 20 so as to be rotatable. The manual valve rod 20 has an axial intermediate portion 20c extending in the horizontal direction, one end of the intermediate portion 20c bent upward at a substantially right angle, and a tip end 20b of the intermediate portion 20c at the detent plate 12. Is engaged with the engagement hole 12b. On the other hand, the other end of the intermediate portion 20c is bent at a substantially right angle downward, and its tip is inserted into and engaged with an insertion hole 31 provided in a manual valve 30 described later.

  A valve body 40 is installed below the detent plate 12 and the manual valve rod 20 in the transmission case 2. The valve body 40 is formed in a substantially rectangular box shape, and an opening 41a of a valve accommodating hole 41 that accommodates the manual valve 30 is disposed on one side surface 40b thereof. The valve accommodation hole 41 is a cylindrical cavity extending in the horizontal direction in the valve body 40, and the manual valve 30 accommodated in the valve accommodation hole 41 passes through the valve accommodation hole 41 along its longitudinal direction. It is designed to move forward and backward. And as for the manual valve 30, the front-end | tip part 30a protrudes sideways from the opening part 41a. An insertion hole (insertion portion) 31 for inserting the distal end portion 20a of the manual valve rod 20 is provided in the vicinity of the distal end portion 30a protruding from the opening 41a in the manual valve 30. The insertion hole 31 is formed as a substantially cylindrical through hole that vertically penetrates the vicinity of the distal end portion 30 a of the manual valve 30. The inner peripheral edge of the insertion hole 31 is a chamfered portion 32 that is chamfered in a mortar shape that gradually decreases in diameter from the upper end toward the lower side. On the other hand, the tip portion 20a of the manual valve rod 20 is also provided with a chamfered portion 22 formed in a tapered shape that gradually decreases in diameter toward the tip. That is, the chamfered portion 32 and the chamfered portion 22 are formed in a conical shape having an inclined surface that is inclined with respect to the insertion direction (vertical direction) of the distal end portion 20 a with respect to the insertion hole 31.

  On the upper surface 40 a of the valve body 40, restricting bosses (protrusions) 42 and 43 for restricting the lateral deflection width of the distal end portion 20 a of the manual valve rod 20 are provided. One restricting boss 42, 43 is disposed on each of the left and right sides of the manual valve rod 20 near the front end 20a. Each of the bosses 42 and 43 is formed by a substantially columnar protrusion that is erected on the upper surface 40 a of the valve body 40. When the manual valve rod 20 is assembled to the manual valve 30 described later, the left and right deflection is restricted at a position where the manual valve rod 20 contacts the bosses 42 and 43 on both sides.

  In the shift operation mechanism 1, when the driver operates the shift lever in the vehicle compartment, the manual shaft 11 and the detent plate 12 rotate in conjunction with the operation of the shift lever. At that time, the detent plate 12 rotates by a predetermined angle by the action of the detent roller 14 and the detent portion 12a. As the detent plate 12 rotates, the manual valve rod 20 swings (advances and retreats), so that the manual valve 30 is switched to a position corresponding to the shift lever input range.

  Next, an assembling procedure of the shift operation mechanism 1 having the above-described configuration will be described. In order to assemble the speed change operation mechanism 1, first, the manual shaft 11, the detent plate 12, and the manual valve rod 20 are assembled, and these are previously installed at predetermined positions in the transmission case 2. The manual valve rod 20 in the transmission case 2 is installed with its intermediate portion 20c extending in the horizontal direction and the tip portion 20a protruding vertically downward. In this state, the valve body 40 is installed in the transmission case 2. At this time, the manual valve 30 is accommodated in the valve accommodating hole 41 of the valve body 40, and the distal end portion 30 a and the insertion hole 31 of the manual valve 30 are exposed from the opening 41 a of the valve accommodating hole 41. The insertion hole 31 is arranged with its axial direction facing the up-down direction. In order to install the valve body 40 in the transmission case 2, the valve body 40 is disposed below the transmission case 2, lifted upward therefrom, and the assembly direction (from bottom to top) indicated by the arrow in FIG. Move in the direction toward). Thus, the valve body 40 is installed below the detent plate 12 and the manual valve rod 20 in the transmission case 2.

  At this time, the manual valve rod 20 is disposed between a pair of bosses 42 and 43 provided on the upper surface 40 a of the valve body 40. As a result, the left and right deflection width of the manual valve rod 20 is regulated within a predetermined range by the pair of bosses 42 and 43. When the valve body 40 is further lifted upward in this state, the distal end portion 20a of the manual valve rod 20 is inserted into the insertion hole 31 of the manual valve 30 and engaged. Thereafter, the valve body 40 is fixed in the transmission case 2 by fastening bolts (not shown). Thus, as shown in FIG. 1, the valve body 40 is installed below the detent plate 12 and the manual valve rod 20, and the tip 20 a of the manual valve rod 20 is inserted into the insertion hole 31 of the manual valve 30. Engage.

  2A is a schematic bottom view showing the manual valve rod 20 as viewed from the lower surface side of the transmission case 2, and FIG. 2B is an enlarged view of a portion A in FIG. It is a figure for demonstrating the positional relationship of the front-end | tip part 20a and the insertion hole 31 of the manual valve 30. FIG. In addition, in FIG.2 (b), arrangement | positioning of the manual valve 30 is shown with the dotted line. As shown in these drawings, in the speed change operating mechanism 1 of the present embodiment, the pair of bosses 42 and 43 abut against the manual valve rod 20, so that the swing width (X) of the manual valve rod 20 to the left and right is increased. It is regulated within a predetermined range.

  In this case, the manual valve rod 20 is formed by setting the shape or dimensions of the chamfered portion 32 formed in the insertion hole 31 of the manual valve 30 and the chamfered portion 22 formed in the distal end portion 20a of the manual valve rod 20. The tip 20a of the manual valve rod 20 is introduced into the insertion hole 31 of the manual valve 30 within the range of the swing width (X) regulated by the bosses 42 and 43. That is, as shown in FIG. 2B, the chamfered portion 22 including the tip 20a of the manual valve rod 20 is within the range of the swing width (X) where the manual valve rod 20 is regulated by the bosses 42 and 43. The region and the region of the chamfered portion 32 formed in the insertion hole 31 of the manual valve 30 are positioned so as to overlap each other in the vertical direction. Thereby, when the valve body 40 is moved upward and assembled to the lower side of the manual valve rod 20, if the manual valve rod 20 is disposed between the pair of bosses 42 and 43, the tip portion 20a of the manual valve rod 20 is moved. It can be reliably inserted into the insertion hole 31 of the manual valve 30.

  As described above, according to the speed change operation mechanism 1 of the present embodiment, the bosses 42 and 43 that regulate the swing width by contacting the manual valve rod 20 are provided, and the valve body 40 is connected to the detent plate 12 and the manual valve. When assembled to the lower side of the rod 20, the swing width of the manual valve rod 20 is restricted by the bosses 42 and 43, and the tip portion 20 a of the manual valve rod 20 is inserted into the insertion hole 31 of the manual valve 30. did. Therefore, the manual valve rod 20 can be inserted into the manual valve 30 and engaged with them as the valve body 40 is assembled. Thereby, the efficiency of the assembly operation of the speed change operation mechanism 1 can be improved. Further, the swing width of the manual valve rod 20 is regulated by the bosses 42 and 43, and the distal end portion 20a of the manual valve rod 20 is inserted into the insertion hole 31 of the manual valve 30. It is not always necessary to ensure the visibility of the tip 20a of the manual valve rod 20 and the insertion hole 31 of the manual valve 30 and the work space for assembling them. Therefore, the assembly work can be facilitated. Also, the assembly work can be automated. Furthermore, since the distal end portion 20a of the manual valve rod 20 can be reliably inserted into the insertion hole 31 of the manual valve 30, it is possible to avoid the occurrence of non-assembly or incorrect assembly, and to improve the quality of the product. it can.

  Further, in the above speed change operation mechanism 1, the insertion hole 31 of the manual valve 30 and the distal end portion 20 a of the manual valve rod 20 are formed with chamfered portions 32 and 22 formed by chamfering the insertion hole 31 and the distal end portion 20 a. ing. Then, when the manual valve rod 20 is within the range of the swing width restricted by the bosses 42 and 43, the chamfered portions 32 and 22 of the chamfered portions 32 and 22 are inserted so that the distal end portion 20 a of the manual valve rod 20 is inserted into the insertion hole 31. The shape and dimensions are set. As a result, if the manual valve rod 20 is regulated by the bosses 42 and 43, the distal end portion 20a of the manual valve rod 20 is reliably inserted into the insertion hole 31 of the manual valve 30 as the valve body 40 is assembled. The assembly efficiency of the speed change operation mechanism 1 can be further improved. In addition, since it is possible to reliably avoid the occurrence of unassembled or erroneous assembly, it is possible to further improve the quality of the product.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. For example, the installation direction and the assembly direction of each part of the speed change operation mechanism 1 shown in the above embodiment are examples, and may be configured to be installed or assembled in other directions. That is, in the above embodiment, an example in which the valve body 40 is moved from the bottom to the top in the transmission case 2 and the valve body 40 is assembled to the lower side of the detent plate 12 and the manual valve rod 20 is shown. However, the valve body 40 may be configured to be installed in another direction with respect to the detent plate 12 and the manual valve rod 20.

  Further, in the above-described speed change operation mechanism 1, the case where the pair of bosses 42 and 43, which are restricting portions for restricting the deflection of the rod member according to the present invention, is provided on the upper surface 40 a of the valve body 40, is shown. In addition to being provided on the valve body 40 side, the restricting portion for restricting the deflection of the members can be provided on the transmission case 2 side. In that case, it is preferable that the restricting portion is constituted by a protruding rib formed on the inner surface of the transmission case 2.

  Moreover, although the said embodiment demonstrated the case where both the chamfering part 32 formed in the insertion hole 31 of the manual valve 30 and the chamfering part 22 formed in the front-end | tip part 20a of the manual valve rod 20 were provided, Only one of the chamfered portion 32 and the chamfered portion 22 may be provided.

DESCRIPTION OF SYMBOLS 1 Shifting operation mechanism 2 Transmission case 11 Manual shaft 12 Detent plate 12a Detent part 12b Engagement hole 13 Coil spring 14 Detent roller 20 Manual valve rod (rod member)
20a distal end 20b root end 20c intermediate 22 chamfer 30 manual valve 30a distal end 31 insertion hole (insertion portion)
32 Chamfered portion 40 Valve body 40a Upper surface (surface on the rod member side)
40b Side 41 Valve accommodating hole 41a Opening 42, 43 Boss (regulator)

Claims (3)

A manual shaft that rotates in conjunction with the shift lever operation,
A detent plate fixed to the manual shaft and rotated integrally with the manual shaft;
The end portion on the base side engages with the detent plate, the tip end portion is inserted into and engaged with an insertion portion provided in the manual valve, and swings with the rotation of the detent plate, thereby the manual valve A rod member for moving forward and backward,
A shift body of an automatic transmission comprising a valve body in which the manual valve is housed,
A regulation portion that regulates a swing width of the rod member by contacting the rod member;
When assembling the valve body to the side of the detent plate and the rod member, the restricting portion restricts the swinging width of the rod member, and the tip of the rod member is inserted into the insertion portion of the manual valve. A speed change operation mechanism for an automatic transmission. The restricting portion comprises a pair of projecting portions provided on a surface of the valve body on the rod member side,
When assembling the valve body to the side of the detent plate and the rod member, by moving the valve body toward the rod member, the rod member is disposed between the pair of protrusions, The shift operation mechanism of the automatic transmission according to claim 1, wherein the deflection of the rod member is restricted. At least one of the insertion part of the manual valve and the tip part of the rod member is formed with a chamfered part formed by chamfering the insertion part or the tip part,
The shape or size of the chamfered portion is set so that the rod member is swung within a range restricted by the restricting portion, and the tip end portion of the rod member is inserted into the insertion portion of the manual valve. The shift operation mechanism of an automatic transmission according to claim 1 or 2,

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