JPH0453872Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a shift rod insertion jig, and more particularly to a shift rod insertion jig used for inserting a shift rod of an automobile transmission into a shift rod insertion hole in a casing.

[Prior art]

For automobile transmissions, Fig. 1 according to the embodiment
As shown in FIG. 2, in order to change the gears of the internal transmission mechanism, a shift rod 2 for 1st and 2nd speeds, a shift rod 3 for 3rd and 4th speeds, and a shift rod 4 for 5th speed are generally installed in the upper part of the casing 1 of the transmission. They are arranged parallel to the space, and their rear ends on the rear side of the vehicle body are connected to a shift end 5 of a shift lever (not shown).
These shift rods 2 to 4 are slidably inserted in the shift rod insertion holes 7 of the support wall 6 of the top cover 1A of the casing 1 in the axial direction.
Inside the wall, steel balls 8 for regulating the stroke of each of the shift rods 2 to 4 are arranged in vertical steel ball receiving holes 9 corresponding to each of the shift rods 2 to 4, and each steel ball 8 is supported by a compression coil spring 10. shift rod 2~4
The steel balls 8 are strongly elastically biased toward the side, and the shift positions of the shift rods 2 to 4 are maintained by engaging each steel ball 8 with an engagement recess 11 on the upper surface of the shift rods 2 to 4.

In addition, a large diameter interlock pin 13 is installed in the pin accommodation hole 12 of the support wall 6 between the shift rods 2 to 4, and a large diameter interlock pin 13 is installed in each shift rod 2 to 4 when the shift rods 2 to 4 are switched to a predetermined position. A small-diameter interlock pin 14 that abuts the diameter interlock pin 13 is attached, and the support wall portion 6
A reverse switch 15 is attached to the left end of the
A switch pin 17 as an actuating piece for operating the reverse switch 15 is installed in the left side of the pin receiving hole 12, and a neutral switch 16 is installed in the right end of the support wall 6. A switch pin 18 as an operating piece is installed in the right side portion of the pin receiving hole 12.

When attaching the three shift rods 2 to 4 to the top cover 1A, press each steel ball 8 against the strong spring 10 while attaching each shift rod 2 to 4 to the top cover 1A.
must be inserted into the insertion hole 7 from the front.

Conventionally, the installation of the steel ball 8 and the shift rods 2 to 4
To assemble the springs 1 and 1, turn the top cover 1A upside down and insert the spring 1 through the supply hole 19 facing the steel ball accommodation hole 9.
0 and the steel ball 8, insert a cylindrical rod jig through the supply hole 19, grasp this rod jig with one hand, and use the rod jig to push the steel ball 8 against the strong spring 10. At the same time, the shift rods 2 to 4 were assembled by inserting them into the rod insertion holes 7 with the other hand.

[Problem that the invention attempts to solve]

When assembling the shift rod as in the prior art described above, interference between the rod jig and the shift rod is likely to occur, and if the rod jig is removed before the steel ball is sufficiently pressed down at the end of the shift rod, Even a highly skilled person often fails to assemble the steel ball and shift rod, such as the steel ball flying out due to the force of the strong spring. As described above, with the prior art, it is difficult to efficiently and simply assemble the steel ball and the shift rod.

[Means for solving problems]

The shift rod insertion jig according to the present invention includes a rod member that is removably inserted into a shift rod insertion hole in a casing of a transmission, and an insertion hole into which a steel ball for regulating the stroke of the shift rod is inserted. A steel ball guide groove is provided in this rod member, which is connected to the insertion hole at the deepest part, is parallel to the axial direction of the rod member, and has an inclined groove bottom, and when the shift rod is inserted, the steel ball is accommodated in the steel ball guide groove. The rod member is configured to move in the axial direction to push down the steel ball.

[Effect]

When assembling a steel ball and a shift rod using the shift rod insertion jig according to the present invention, the rod member is attached to the shift rod insertion hole of the inverted casing, and the rod member is inserted into the deepest part of the steel ball guide groove and into the insertion hole. facing the steel ball accommodation hole on the casing side, supply the steel ball from the insertion hole to the deepest part of the steel ball guide groove, place the steel ball on the spring of the steel ball accommodation hole, and insert the steel ball into the steel ball guide groove of the rod member. When the shift rod is brought into coaxial contact with the end surface where the rod becomes shallower, and the rod member and shift rod are moved together in the opposite direction of the shift rod, the steel ball will move into the inclined groove of the steel ball guide groove. While contacting the bottom, the steel ball is gradually pushed into the steel ball housing hole at the bottom of the groove against the spring, and when it comes out of the guide groove, it is held down by the outer circumferential surface of the rod member, and as the shift rod moves further, the shift rod The steel ball is held down by the outer peripheral surface, and thus the steel ball can be reliably and smoothly installed in the steel ball receiving hole and the shift rod can be installed in the shift rod insertion hole.

[Effect of idea]

According to the shift rod insertion jig of the present invention, as explained above, the shift rod insertion jig has a simple structure in which the rod member is provided with an insertion hole for inserting a steel ball and a steel ball guide groove. It is very easy to install the ball and insert and install the shift rod.

Furthermore, it is also possible to incorporate the rod insertion jig into an automatic device to automate the assembly work of installing the steel ball and inserting and installing the shift rod.

〔Example〕

Embodiments of the shift rod insertion jig according to the present invention will be described below with reference to the drawings.

As shown in Figures 1 and 2, automobile transmissions have a system that changes the gears of the internal transmission mechanism.
Generally, a shift rod 2 for 1st and 2nd speeds, a shift rod 3 for 3rd and 4th speeds, and a shift rod 4 for 5th speed are arranged in parallel in the upper space within the casing 1 of the transmission.
Their rear ends on the rear side of the vehicle body are connected to a shift end 5 of a shift lever (not shown), and these shift rods 2 to 4 are connected to the top cover 1A of the casing 1.
The steel balls 8 are inserted into the respective shift rod insertion holes 7 of the support wall portion 6 so as to be slidable in the axial direction, and within the wall portion of the support wall portion 6 are steel balls 8 for regulating the strokes of the respective shift rods 2 to 4. The steel balls 8 are arranged in vertical steel ball receiving holes 9 in a corresponding manner, and each steel ball 8 is strongly elastically biased toward the shift rods 2 to 4 by a compression coil spring 10, so that each steel ball 8 is pushed to the upper surface of the shift rods 2 to 4. The shift rods 2 to 4 are held in their shift positions by being engaged with the engagement recesses 11 of the shift rods 2 to 4.

In addition, a large diameter interlock pin 13 is installed in the pin accommodation hole 12 of the support wall 6 between the shift rods 2 to 4, and a large diameter interlock pin 13 is installed in each shift rod 2 to 4 when the shift rods 2 to 4 are switched to a predetermined position. A small-diameter interlock pin 14 that abuts the diameter interlock pin 13 is attached, and the support wall portion 6
A reverse switch 15 (gasoline) is mounted on the left end of the switch, and a switch pin 17 as an operating piece for operating the reverse switch 15 is inserted into the pin receiving hole 12.
A neutral switch 16 (gasoline) is installed in the right end of the support wall 6, and a switch pin 18 as an operating piece for operating the neutral switch 16 is installed in the right side of the pin receiving hole 12. ing.

When inserting the three shift rods 2 to 4 into the shift rod insertion holes 7 of the top cover 1A, push each of the steel balls 8 against the strong spring 10 while inserting each of the shift rods 2 to 4 into the insertion holes 7 from the front. must be inserted. Next, the steel ball 8
While pushing the steel ball into the steel ball accommodation hole 9, shift rod 2~
The shift rod insertion jig D (hereinafter referred to as the insertion jig) for inserting and mounting the shift rod 4 into the insertion hole 7 and its function will be explained with reference to FIGS. 3 and 4. However, the following explanation will be made assuming that the upper, lower, left, and right sides in FIGS. 3 and 4 are the upper, lower, left, and right sides.

FIG. 3 shows a state where the top cover 1A is inverted and the steel balls 8 and, for example, the shift rod 2 for 1st and 2nd speeds are assembled using the insertion jig D. In order to attach the steel ball 8 to the steel ball receiving hole 9, a steel ball 8 is installed in a portion of the support wall 6 above the insertion hole 7 so as to coaxially face the steel ball receiving hole 9.
A supply hole 19 having a slightly larger diameter is opened, and the supply hole 19 is connected to the insertion hole 7 and the steel ball accommodation hole 9.

The insertion jig D includes a rod member 20 and a collar member 2.
1, a flange member 21 is externally fitted and fixed to approximately the center of the rod member 20, and a flange member 21 is internally fitted to the left side of the flange member 21 in the insertion hole 7 so as to be slidable in the axial direction. and approximately 2 of the thickness of the supporting wall portion 6
A rod main body portion 20a of double length is provided, and a grip portion 20b is provided on the other side.

Further, when the rod body 20a is inserted through the insertion hole 7 and the collar 21 is brought into contact with the support wall 6, the rod body 20 corresponding to the supply hole 19 is inserted.
An insertion hole 22 that allows the steel ball 8 to pass through is formed coaxially with the supply hole 19 in the upper part of the rod body 20a. A ball guide groove 23 is recessed parallel to the axial direction.

The steel ball guide groove 23 is connected to the deepest part 23a where the groove depth is maximum and to the right of the deepest part 23a, and the groove depth is on the right side (toward the end of the rod main body 20a that comes into contact with the shift rod 2). The groove width of the steel ball guide groove 23 is formed to be slightly larger than the diameter of the steel ball 8.
Further, the inner end 24 of the deepest part 23a on the side of the grip part 20b is formed so that there is a slight gap between it and the outer surface of the steel ball 8 on the spring 10, as shown in the figure, and the groove bottom of the steel ball guide groove 23 is 25 and its vicinity are formed in a semicircular shape that allows the steel ball 8 to pass through, as shown in FIG. 4, and the insertion hole 22 as shown in FIG.
In a cross section taken along a plane including the axial center of the steel ball guide groove 23 and the axial center of the rod main body 20a, the groove bottom 2 of the steel ball guide groove 23
5 is a straight portion 25a extending from the inner end 24 of the deepest portion 23a to near the axis of the insertion hole 22, and this straight portion 25.
a gently curved portion 25b that smoothly continues to the right side of a and extends over a predetermined range and becomes shallower toward the right; and a gently sloped portion 25b that smoothly continues to the right of this gently curved portion 25b and becomes shallower toward the right. Slope part 2
5c.

The operation of inserting the shift rod 2 into the shift rod insertion hole 7 while pushing the steel ball 8 into the steel ball accommodation hole 9 using the shift rod insertion jig D will be explained.

Hold the top cover 1A of the casing 1 of the TransmissionTM in an inverted state, install the spring 10 from the supply hole 19 into the steel ball accommodation hole 9, and insert the rod of the insertion jig D as shown by the solid line in FIG. Main body part 2
0a is inserted into the insertion hole 7, the collar member 21 is brought into contact with the support wall 6, the supply hole 19 and the insertion hole 22 are held coaxially, and the steel ball 8 is inserted into the supply hole 19 and the insertion hole 22.
The steel ball is supplied into the deepest part 23a of the steel ball guide groove 23 through the above, and is placed at the upper end of the spring 10. Next, the end surface of the shift rod 2 is coaxially brought into contact with the right end surface of the rod main body 20a, and while gripping the grip portion 20b with one hand and moving it to the left, gripping the shift rod 2 with the other hand to maintain the contact state. While holding the button, move it to the left.

At this time, as shown by the imaginary line, the steel ball 8 comes into contact with the groove bottom 25 of the steel ball guide groove 23, and as the insertion jig D moves leftward, the groove bottom 25 that comes into contact with the steel ball 8 gradually descends. Therefore, the steel ball 8 is gradually pushed into the steel ball accommodation hole 9 against the elastic force of the spring 10, and at the point when the right end of the steel ball guide groove 23 passes the steel ball 8, the steel ball 8 is pushed into the steel ball accommodation hole 9 against the elastic force of the spring 10. 8 is completely accommodated in the spring housing hole 9, and from that point on, the steel ball 8 is held down by the lower side of the outer peripheral surface of the rod body 20a, so the left end of the shift rod 2 interferes with the steel ball 8. The steel ball 8 passes smoothly over the steel ball 8 without any movement, and then the steel ball 8 is held down by the lower side of the outer circumferential surface of the shift rod 2 and remains attached to the steel ball accommodation hole 9, so the shift rod 2 is moved further to the left. It is possible to move it in either direction to bring it into a predetermined assembled state.

At the beginning of the pushing of the steel ball 8, the steel ball 8 is pushed downward by the straight part 25a and the gently curved part 25b of the groove bottom 25 with a small inclination angle, so that it does not come out of the steel ball accommodation hole 9 and is securely pressed. is pushed into the steel ball accommodation hole 9,
Thereafter, when the steel ball 8 is pushed into the steel ball accommodation hole 9 to a certain extent, it becomes unable to move upward, so that it can be mounted securely as described above.

In this way, three sets of shift rods 2 to 4 and steel balls 8 can be easily assembled one after another using the shift rod insertion jig D, which has an extremely simple structure and has an insertion hole 22 and a steel ball guide groove 23. I can do it.

When moving the insertion jig D and the shift rod 2 synchronously, do not hold the insertion jig D, but move them synchronously to the left while pushing the insertion jig D with the shift rod 2. Good too.

The above explanation was about manual assembly using the insertion jig D. However, the insertion jig D is attached to the hand of the assembly robot, and the assembly robot installs the steel ball 8 and the shift rod 2. Alternatively, the insertion jig D may be attached to a dedicated automatic machine.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic plan view of the transmission with the top cover and support wall section cut away, and FIG.
3 is a longitudinal sectional view of the support wall portion of the top cover and the shift rod insertion jig, and FIG. 4 is a sectional view taken along the line of FIG. 3. TM...Transmission, 1...Casing, 1A...Top cover, 2-4...Shift rod, 6...Support wall, 7...Shift rod insertion hole, 8...Steel ball, 22...Insertion hole, 23...Steel ball guide groove, 23a...Deepest part.

Claims (1)

[Scope of utility model registration request] A rod member is provided to be removably inserted into the shift rod insertion hole of the transmission casing, and this rod member is provided with an insertion hole into which a steel ball for regulating the stroke of the shift rod is inserted. A continuous steel ball guide groove is provided that is parallel to the axial direction of the rod member and has an inclined groove bottom, and when the shift rod is inserted, the rod member is moved in the axial direction with the steel ball accommodated in the steel ball guide groove. A shift rod insertion jig characterized in that it is configured to push down.