Vehicle transmission

Abstract

To provide a vehicular transmission capable of regulating the posture change of an insertion member when the insertion member is inserted in a transmission case, and improving the assembling property of the insertion member to the transmission case.SOLUTION: A transmission case 2 has an engaging portion 2A that is provided inside the transmission case 2 and is engaged with a shift-and-select shaft 5, and a guide wall 2B that is provided inside the transmission case 2 so as to be located closer to an opening portion 2a side than the engaging portion 2A. When the shift-and-select shaft 5 in which a cam member 11 and an interlock plate 12 are integrated is inserted in the transmission case 2 through the opening portion 2a, before the shift-and-select shaft 5 is engaged with the engaging portion 2A, the interlock plate 12 abuts on the guide wall 2B to prevent the posture change of the shift-and-select shaft 5 and the interlock plate 12.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a vehicle transmission. [Background technology]

[0002] BACKGROUND ART There is known a vehicle transmission in which insert members such as an input shaft and an output shaft are held in the same line and assembled to a transmission case (see Patent Document 1).

[0003] In this vehicle transmission, the tip of the output shaft is inserted into a bearing hole in the input shaft with a pilot bearing interposed between them, thereby holding both shafts on the same axis. A guide pipe is provided in the center of the bearing hole at the tip of the output shaft and is inserted so that it can slide and rotate freely into the guide hole.

[0004] The tip of the guide pipe is located closer to the output shaft than the outer end of the pilot bearing, and after both shafts are positioned by the guide pipe and guide hole, the tip of the output shaft is allowed to enter the bearing hole. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 11-303952 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the vehicle transmission described in Patent Document 1, after both shafts are positioned using a guide pipe and a guide hole, the tip of the output shaft is allowed to enter the bearing hole, but before the guide pipe is inserted into the guide hole, the input shaft and output shaft cannot be positioned on the same axis.

[0007] For this reason, the worker still needs to rely on intuition to position the guide pipe and the output shaft on the same axis, making the task of assembling the input shaft and output shaft into the transmission case cumbersome.

[0008] Furthermore, the guide pipe and guide hole described in Patent Document 1 cannot be positioned in the rotational direction of the input shaft and output shaft, making it difficult to stabilise their posture in the desired rotational position when assembled to the transmission case.

[0009] The present invention has been made in light of the above-mentioned circumstances, and aims to provide a vehicle transmission that can restrict changes in the posture of the insertion member when the insertion member is inserted into the transmission case, thereby improving the ease of assembly of the insertion member to the transmission case. [Means for solving the problem]

[0010] The present invention includes a transmission case having an opening; a shaft member extending in an insertion direction and an insertion part supported on an outer periphery of the shaft member so as to be rotatable about the axis of the shaft member; an insert member inserted into the transmission case through the opening, the transmission case being provided inside the transmission case, Goods are coming in Engage Person in charge The joint and Opposite the insertion member Inside the transmission case a wall extending from the opening to the engagement portion; guide wall and The aforementioned When the insertion member is inserted into the transmission case through the opening, the insertion member is engaged with the engagement portion before the insertion member is engaged with the engagement portion. parts The above guide wall The insertion member is prevented from changing its position by coming into contact with the insertion member. [Effects of the Invention]

[0011] As described above, according to the present invention, when the insertion member is inserted into the transmission case, the change in the posture of the insertion member can be restricted, thereby improving the ease of assembling the insertion member to the transmission case. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a vertical cross-sectional view of a vehicle transmission according to a first embodiment of the present invention, taken along the axis of a shift and select shaft. [Figure 2] FIG. 2 is a diagram showing a vehicle transmission according to a first embodiment of the present invention, and is a plan view of the transmission case around the opening, showing the relationship with the interlock plate. [Figure 3] 3 is a cross-sectional view taken along the line III-III in FIG. 2. FIG. [Figure 4] FIG. 4 is a diagram showing a vehicle transmission according to a first embodiment of the present invention, showing a state during assembly in which the shift and select shaft is inserted into the transmission case through the opening. [Figure 5] FIG. 5 is a view showing a vehicle transmission according to a second embodiment of the present invention, and is a plan view of the transmission case around the opening, showing the relationship with the interlock plate. [Figure 6] FIG. 6 is a view showing a vehicle transmission according to a third embodiment of the present invention, and is a plan view of the transmission case around the opening, showing the relationship with the interlock plate. DETAILED DESCRIPTION OF THE INVENTION

[0013] A vehicle transmission according to one embodiment of the present invention is a vehicle transmission having a transmission case with an opening and an insertion member that is inserted into the transmission case through the opening, wherein the transmission case has at least one engagement portion provided inside the transmission case that engages with the insertion member, and a guide portion provided inside the transmission case so as to be positioned closer to the opening than the engagement portion, and when the insertion member is inserted into the transmission case through the opening, the insertion member abuts against the guide portion before engaging with the engagement portion, thereby preventing the posture of the insertion member from changing.

[0014] As a result, the vehicle transmission according to one embodiment of the present invention can restrict the posture of the insertion member from changing when the insertion member is inserted into the transmission case, thereby improving the ease of assembly of the insertion member to the transmission case. [Example]

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle transmission according to an embodiment of the present invention will now be described with reference to the accompanying drawings. (First Example) 1 to 4 are diagrams showing a vehicle transmission according to a first embodiment of the present invention.

[0016] In Figures 1 to 4, the up / down, front / rear, left / right directions are based on the vehicle transmission installed in the vehicle, and the front / rear direction of the vehicle is the front / rear direction, the left / right direction of the vehicle (vehicle width direction) is the left / right direction, and the up / down direction of the vehicle (vehicle height direction) is the up / down direction.

[0017] First, the configuration will be described. The transmission 1 mounted on the vehicle is, for example, composed of an AMT (Automated Manual Transmission), and converts the rotational speed and rotational torque of an internal combustion engine (not shown) according to the running state of the vehicle, and transmits them to drive wheels (not shown).

[0018] The transmission 1 includes a transmission case 2, and an opening 2a is formed in the upper part of the transmission case 2. The transmission case 2 is provided with components that constitute the transmission 1, such as a shift device 3 and a transmission gear mechanism (not shown).

[0019] The shift device 3 includes a shift case 4, which has a cylindrical housing portion 4A and a fixing portion 4B that is fixed to the upper portion of the transmission case 2 by a bolt (not shown).

[0020] The shift case 4 closes the opening 2a of the transmission case 2, and the fixing portion 4B is fixed to the periphery of the opening 2a with bolts.

[0021] The shift case 4 is attached to the transmission case 2 via a sealing member (not shown), and the sealing member seals an opening 2a of the transmission case 2. This prevents foreign matter from entering the interior of the transmission case 2 through the opening 2a, and also prevents lubricating oil stored inside the transmission case 2 from leaking to the outside.

[0022] A shift and select shaft 5 is housed inside the transmission case 2. The upper part of the shift and select shaft 5 is supported by the shift case 4. The shift and select shaft 5 is an insertion part that constitutes an insertion member that is inserted through an opening 2a of the transmission case 2 and disposed and attached inside the transmission case 2.

[0023] The shift and select shaft 5 moves in the direction of axis O relative to the shift case 4 in response to the select operation, and rotates around axis O relative to the shift case 4 in response to the shift operation. The insertion member is an assembly of the shift and select shaft 5 and parts attached to the shift and select shaft 5, and is the part that is inserted into the transmission case 2 through the opening 2a. The insertion parts are the parts that make up the insertion member.

[0024] The axis of the shift and select shaft 5 is indicated by O. The direction of the axis O of the shift and select shaft 5 is also referred to as the axial direction of the shift and select shaft 5.

[0025] In FIG. 1, the movement of the shift and select shaft 5 in the axial direction is indicated as a select direction S1, and the rotation of the shift and select shaft 5 around the axis O is indicated as a shift direction S2.

[0026] The upper end side of the shift and select shaft 5 is supported in the housing portion 4A of the shift case 4, and the shift and select shaft 5 is supported so as to be movable in the axial direction and rotatable relative to the housing portion 4A.

[0027] An engagement portion 2A consisting of a hole into which the lower end portion 5a of the shift and select shaft 5 is inserted is provided below the opening 2a of the transmission case 2, and the shift and select shaft 5 is supported by the engagement portion 2A so as to be movable axially and rotatable. Hereinafter, the engagement point between the lower end portion 5a of the shift and select shaft 5 and the engagement portion 2A may be referred to as the "first engagement portion."

[0028] Furthermore, the engagement of the lower end portion 5a of the shift and select shaft 5 with the engagement portion 2A is referred to as a first engagement. Furthermore, the lower end portion 5a of the shift and select shaft 5 constitutes the end portion of the insertion member.

[0029] That is, the shift and select shaft 5 has its lower end 5a supported by the first engagement portion so as to be movable axially between the shift case 4 and the transmission case 2 and rotatable about the axis O.

[0030] The shift case 4 is provided with a select actuator and a shift actuator (not shown), and the select actuator and the shift actuator operate the shift and select shaft 5 in a select direction S1 or a shift direction S2.

[0031] A cam member 11 is fixed to the shift and select shaft 5, and the cam member 11 moves integrally with the shift and select shaft 5.

[0032] The cam member 11 has a cam surface 11A, a finger portion 11B protruding from the surface opposite the cam surface 11A in a direction perpendicular to the axial direction of the shift and select shaft 5, and a guide groove (not shown) formed on a surface perpendicular to the cam surface 11A.

[0033] In the transmission 1, a shift yoke 21A for 1st / 2nd gear, a shift yoke 21B for 3rd / 4th gear, a shift yoke 21C for 5th / 6th gear, and a shift yoke 21D for reverse are arranged so as to overlap each other.

[0034] The finger portion 11B is fitted to one of the shift yokes 21A for 1st and 2nd gears, the shift yoke 21B for 3rd and 4th gears, the shift yoke 21C for 5th and 6th gears, and the shift yoke 21D for reverse, and by swinging around the axis O of the shift and select shaft 5, one of the shift yokes 21A, 21B, 21C, and 21D is moved by the swing of the finger portion 11B.

[0035] The shift yokes 21A, 21B, 21C, and 21D are formed in a U-shape when viewed from above, and are fitted to the finger portion 11B so as to sandwich the finger portion 11B in the left-right direction.

[0036] That is, the shift yokes 21A, 21B, 21C, and 21D have notches cut out in the center in the left-right direction when viewed from above, forming notched grooves 21a, 21b, 21c, and 21d. This results in a U-shape that opens toward the shift and select shaft 5, and the finger portion 11B fits into the notched grooves 21a, 21b, 21c, and 21d, thereby fitting the finger portion 11B and the shift yokes 21A, 21B, 21C, and 21D together. The transmission 1 of this embodiment is a transmission with six forward speeds. However, the number of speeds is not limited to six.

[0037] An interlock plate 12 is attached to the bottom of the shift and select shaft 5 so as to surround the cam member 11. The shift and select shaft 5 passes through the interlock plate 12, and the cam member 11 arranged inside prevents the interlock plate 12 from moving in the axial direction of the shift and select shaft 5. Therefore, the interlock plate 12 moves axially together with the shift and select shaft 5 and rotates relative to the shift and select shaft 5.

[0038] The interlock plate 12 has an upper wall 12A and a lower wall 12B extending horizontally, through which the shift and select shaft 5, whose axis O is arranged vertically inside the transmission case 2, passes vertically, and the horizontal width of the interlock plate 12 is formed to be longer than the diameter of the shift and select shaft 5.

[0039] As shown in Figures 1 and 2, interlock plate 12 has an upper wall 12A, a lower wall 12B, a left front wall 12C (see Figure 3) that connects the left front end of upper wall 12A with the left front end of lower wall 12B and extends in the vertical direction, a right front wall 12D that connects the right front end of upper wall 12A with the right front end of lower wall 12B and extends in the vertical direction, an upper rear wall 12E that bends downward from the rear end of upper wall 12A and extends toward finger portion 11B, and a lower rear wall 12F that bends upward from the rear end of lower wall 12B and extends toward finger portion 11B.

[0040] Finger portion 11B is disposed in slit 12d between the lower end of upper rear wall 12E and the upper end of lower rear wall 12F, which are arranged to face each other. Furthermore, when shift and select shaft 5 is assembled, upper rear wall 12E, lower rear wall 12F and finger portion 11B are disposed in notched grooves 21a, 21b, 21c and 21d (see FIG. 1) of shift yokes 21A, 21B, 21C and 21D.

[0041] That is, upper rear wall 12E and lower rear wall 12F of interlock plate 12 engage with notched grooves 21a, 21b, 21c, and 21d of shift yokes 21A, 21B, 21C, and 21D. Hereinafter, the engagement point where lower rear wall 12F of interlock plate 12 engages with notched groove 21d of the shift yoke may be referred to as a "second engagement portion."

[0042] In other words, the lower rear wall 12F of the interlock plate 12 is the part that first engages with the notch groove of the shift yoke, and the notch groove 21d of the shift yoke is located closest to the opening 2a and is the part that first engages with the interlock plate 12, and the engagement point where the interlock plate 12 and the shift yokes 21A, 21B, 21C, and 21D first engage is referred to as the "second engagement part."

[0043] Furthermore, the engagement between interlock plate 12 and shift yokes 21A, 21B, 21C, and 21D is referred to as a second engagement.

[0044] 2, the left front wall 12C and the right front wall 12D are spaced apart in the left-right direction and are arranged side by side in the left-right direction. In detail, the left front wall 12C and the right front wall 12D are arranged on the right and left sides of the shift and select shaft 5, and are arranged at approximately the same distance in the left-right direction from the shift and select shaft 5.

[0045] In addition, when the shift and select shaft 5 is assembled to the transmission case 2, a detent member 13, which will be described later, is inserted and positioned between the left front wall 12C and the right front wall 12D, and the rotational position of the interlock plate 12 is regulated by the detent member 13 abutting against the left front wall 12C or the right front wall 12D.

[0046] As shown in FIG. 1, through holes 12a and 12b are formed in the upper wall 12A and the lower wall 12B, and the shift and select shaft 5 is inserted through the through holes 12a and 12b.

[0047] A slit 12d (see FIG. 4) extending laterally is formed between upper rear wall 12E and lower rear wall 12F of interlock plate 12. The tip of finger portion 11B protrudes outward from interlock plate 12 through slit 12d, and finger portion 11B fits into one of shift yokes 21A, 21B, 21C, and 21D.

[0048] When finger portion 11B is fitted into one of shift yokes 21A, 21B, 21C, and 21D, the remaining three of shift yokes 21A, 21B, 21C, and 21D engage with upper rear wall 12E and lower rear wall 12F of interlock plate 12 and do not fit into finger portion 11B.

[0049] That is, of the shift yokes 21A, 21B, 21C, and 21D, the three that do not engage with the finger portion 11B are positioned offset in the axial direction of the shift and select shaft 5 with respect to the slit 12d, and maintain the neutral position by engaging with the upper rear wall 12E or the lower rear wall 12F of the interlock plate 12, whose rotational position is restricted by the detent member 13. This makes it possible to prevent two gears from being achieved simultaneously inside the transmission.

[0050] When the shift and select shaft 5 moves in the select direction S1, the shift device 3 selects one shift yoke to be fitted with the finger portion 11B.

[0051] Thereafter, when the shift and select shaft 5 rotates in the shift direction S2, a shift fork (not shown) connected to one shift yoke fitted into the finger portion 11B of the cam member 11 operates a synchronizer (not shown), connecting the gear pairs constituting any gear stage so that power can be transmitted, thereby switching the shift range, i.e., changing gears.

[0052] In FIG. 1, shift yoke 21A is connected to a shift shaft 22A for 1st / 2nd gear positions, and a shift fork for 1st / 2nd gear positions is connected to shift shaft 22A for 1st / 2nd gear positions.

[0053] The shift yoke 21B is connected to a shift shaft 22B for the third / fourth speed stages, and a shift fork for the third / fourth speed stages is connected to the shift shaft 22B for the third / fourth speed stages.

[0054] The shift yoke 21C is connected to a shift shaft 22C for the 5th / 6th speed stage, and a shift fork for the 5th / 6th speed stage is connected to the shift shaft 22C for the 5th / 6th speed stage.

[0055] The shift yoke 21D is connected to a reverse shift shaft 22D, and a reverse shift fork is connected to the reverse shift shaft 22D.

[0056] The upper and lower surfaces of the cam member 11 are in contact with the upper wall 12A and lower wall 12B of the interlock plate 12, and the interlock plate 12 does not move relative to the shift and select shaft 5 in the axial direction.

[0057] A guide groove (not shown) formed on the outer peripheral surface of the cam member 11 is composed of a plurality of shift gate patterns arranged in the same manner as the shift pattern for gear changes, and a guide pin (not shown) is inserted into the guide groove.

[0058] The guide groove moves as the shift and select shaft 5 moves in the select direction S1 and rotates in the shift direction S2. At this time, a guide pin is inserted into the guide groove, so the guide groove (cam member 11) moves while being restricted by the guide pin, and after the shift is completed (after the gear change is completed), the guide pin abuts against the wall surface of the guide groove.

[0059] This restricts the amount of movement of the shift and select shaft 5 in the select direction S1 and the shift direction S2, preventing the shift and select shaft 5 from rattling or moving unnecessarily in the select direction S1 and the shift direction S2.

[0060] A guide wall 2B is formed on the front wall 2W of the transmission case 2 facing the cam surface 11A of the cam member 11, and a boss portion 2C is provided on the guide wall 2B. In this embodiment, the shift and select shaft 5 constitutes a shaft member, and the shift and select shaft 5 and the interlock plate 12 constitute an insertion member, and the interlock plate 12 is an insertion member and constitutes an insertion part.

[0061] The front wall 2W of the transmission case 2 forms a wall portion. In other words, the insertion member is an assembly of the shift and select shaft 5 and insertion parts attached to the shift and select shaft 5, and is the portion that is inserted through the opening 2a and disposed inside the transmission case 2.

[0062] A detent member 13 is attached to boss portion 2C. Detent member 13 has a cylindrical body 13A attached to boss portion 2C, a movable body 13B housed in cylindrical body 13A, and a coil spring (not shown) housed in cylindrical body 13A that presses movable body 13B against cam surface 11A.

[0063] The tip of the cylindrical body 13A of the detent member 13 is disposed so as to be sandwiched between the left front wall 12C and the right front wall 12D, and is fitted into a slit between the left front wall 12C and the right front wall 12D.

[0064] The movable body 13B is located rearward of the left front wall 12C and the right front wall 12D, and is in contact with the cam surface 11A.

[0065] When the cam member 11 moves in the select direction S1 and the shift direction S2, the detent member 13 generates a pressing force by means of a coil spring that presses the movable body 13B against the cam surface 11A, thereby applying an operating force when the shift and select shaft 5 moves in the select direction S1 and the shift direction S2.

[0066] When the shift and select shaft 5 moves up and down, the left front wall 12C and the right front wall 12D of the interlock plate 12 move up and down while being restricted by the cylindrical body 13A, whereby the interlock plate 12 is positioned in the rotational direction by the cylindrical body 13A, and the rotation of the interlock plate 12 is restricted.

[0067] The guide wall 2B is located above the engaging portion 2A and below the opening 2a, i.e., between the opening 2a and the engaging portion 2A in the vertical direction.

[0068] The guide wall 2B is formed of a flat surface extending along the axis O of the shift and select shaft 5, and the lower end 2b of the guide wall 2B is connected to the upper end 2c of the engagement portion 2A via the lateral wall 2D. In this embodiment, the guide wall 2B constitutes the guide portion, and the lower end 2b of the guide wall 2B constitutes the lower end of the guide portion.

[0069] That is, the lower end 2b of the guide wall 2B and the upper end 2c of the engagement portion 2A are located at the same height.

[0070] The left front wall 12C and the right front wall 12D of the interlock plate 12, which face the guide wall 2B, are formed on a plane parallel to the axis O of the shift and select shaft 5. In other words, the left front wall 12C and the right front wall 12D of the interlock plate 12 are formed on a plane parallel to the insertion direction of the shift and select shaft 5.

[0071] When the shift and select shaft 5 is engaged with the engaging portion 2A, a gap s is formed between the guide wall 2B and the left front wall 12C and right front wall 12D of the interlock plate 12 of the shift and select shaft 5. In other words, when the shift and select shaft 5 is attached to the transmission case 2, the insertion member does not abut against the guide portion, and the interlock plate 12, which is an insertion part that constitutes the insertion member, is separated from the guide wall 2B.

[0072] The guide wall 2B and the left front wall 12C and right front wall 12D of the interlock plate 12 are formed on approximately parallel surfaces, and the gap s (horizontal distance) is smaller below the detent member 13 than above the detent member 13.

[0073] That is, the guide wall 2B above the detent member 13 is slightly further forward from the shift and select shaft 5 than the guide wall 2B below the detent member 13.

[0074] In the transmission 1, when the shift and select shaft 5 and interlock plate 12 are inserted vertically into the transmission case 2 through the opening 2a, the guide wall 2B abuts against the interlock plate 12 before the interlock plate 12 reaches the shift yokes 21A, 21B, 21C, 21D (before the second engagement portion engages and the second engagement is performed), thereby preventing the posture of the shift and select shaft 5 and the interlock plate 12 from changing.

[0075] In addition, the guide wall 2B abuts against the interlock plate 12 before the shift and select shaft 5 engages with the engagement portion 2A (before the first engagement portion engages and the first engagement is made), thereby restricting changes in the posture of the shift and select shaft 5 and the interlock plate 12.

[0076] Then, the interlock plate 12 is smoothly inserted into the notched grooves 21a, 21b, 21c, and 21d ("second engagement portion") of the shift yokes 21A, 21B, 21C, and 21D, and the shift and select shaft 5 is inserted into the engagement portion 2A ("first engagement portion").

[0077] The attitude of the shift and select shaft 5 and the interlock plate 12 refers to the orientation (inclination) and rotational position of the shift and select shaft 5 and the interlock plate 12.

[0078] In addition, restricting the change in the posture of the shift and select shaft 5 and the interlock plate 12 means restricting the orientation and rotational position of the shift and select shaft 5 and the interlock plate 12 from deviating from their normal positions.

[0079] Furthermore, the term "regulating" also means that an assembly worker can use the guide wall 2B to correct the shift-and-select shaft 5 or the interlock plate 12 that has shifted from its normal position back to the normal position.

[0080] If the orientation and rotational position of the shift and select shaft 5 and interlock plate 12 are in the correct positions, the upper rear wall 12E and lower rear wall 12F of the interlock plate 12 will fit properly with the shift yokes 21A, 21B, 21C, and 21D at the "second engagement portion" without interference when assembling the shift and select shaft 5, allowing for normal assembly.

[0081] However, if the shift and select shaft 5 is not in the correct position and the interlock plate 12 is tilted from the correct position, or if an attempt is made to assemble the shift and select shaft 5 to the transmission case 2 in a state in which the interlock plate 12 has rotated from the correct position, the lower rear wall 12F of the interlock plate 12 may interfere with the shift yokes 21A, 21B, 21C, and 21D and may not be able to enter the cutout grooves 21a, 21b, 21c, and 21d, causing the ``second engagement portion'' to not engage properly, making it difficult to perform correct assembly.

[0082] Furthermore, if the shift and select shaft 5 is not in the correct position, the lower end 5a of the shift and select shaft 5 may not be able to fit into the engagement portion 2A, causing the "first engagement portion" to not engage properly, making it difficult to perform correct assembly.

[0083] Next, the operation will be described. Although the shift case 4 is omitted in FIG. 4, in the manufacturing process of the transmission 1, the integrated shift and select shaft 5 and interlock plate 12 are inserted into the transmission case 2 through the opening 2a. At this time, the integrated shift and select shaft 5 and shift case 4

[0084] During the process of inserting the shift and select shaft 5 and interlock plate 12 into the transmission case 2 through the opening 2a and assembling them to the transmission case 2, if the shift and select shaft 5 tilts or the interlock plate 12 rotates, causing the shift and select shaft 5 and interlock plate 12 to change position (become displaced from their normal position), the upper rear wall 12E and lower rear wall 12F of the interlock plate 12 will not fit into the notched grooves 21a, 21b, 21c, and 21d of the shift yokes 21A, 21B, 21C, and 21D. Furthermore, if the position is not normal, the lower end 5a of the shift and select shaft 5 will not fit into the engagement portion 2A.

[0085] Before being assembled to the transmission case 2, the interlock plate 12 is rotatably assembled to the shift and select shaft 5, so there is a possibility that the interlock plate 12 will rotate relative to the shift and select shaft 5 when the shift and select shaft 5 is assembled.

[0086] When interlock plate 12 rotates relative to shift and select shaft 5, upper rear wall 12E and lower rear wall 12F of interlock plate 12 are misaligned with notched grooves 21a, 21b, 21c, and 21d in the rotational direction, and lower rear wall 12F of interlock plate 12 interferes with shift yokes 21A, 21B, 21C, and 21D, preventing it from entering notched grooves 21a, 21b, 21c, and 21d. Specifically, interference occurs between lower rear wall 12F, which is the lower end of interlock plate 12, and shift yoke 21D, which is closest to opening 2a.

[0087] Therefore, if the interlock plate 12 rotates relative to the shift and select shaft 5, the worker must remove the shift and select shaft 5 from the transmission case 2, correct the position of the interlock plate 12, and then try to insert it again. This requires the worker to repeat the assembling work of the shift and select shaft 5 several times, which takes a lot of time and effort to assemble the shift and select shaft 5 and reduces the workability of the assembling work of the shift and select shaft 5.

[0088] According to the transmission 1 of this embodiment, the transmission case 2 has a second engagement portion (the engagement point between the interlock plate 12 and the shift yokes 21A, 21B, 21C, 21D) provided inside the transmission case 2 and engaging with the insertion member, or a first engagement portion (the engagement point between the lower end portion 5a of the shift and select shaft 5 and the engagement portion 2A) engaging with the insertion member, and a guide wall 2B provided inside the transmission case 2 so as to be positioned closer to the opening 2a than the first engagement portion and the second engagement portion.

[0089] The guide wall 2B is disposed so as to be able to come into contact with the interlock plate 12 before it engages with the notched grooves 21a, 21b, 21c, and 21d of the shift yokes 21A, 21B, 21C, and 21D. The guide wall 2B is also formed on the inner surface of the transmission case 2 so as to be able to come into contact with the interlock plate 12 before the lower end 5a of the shift and select shaft 5 engages with the engaging portion 2A.

[0090] In the transmission 1 of this embodiment, when the shift and select shaft 5 incorporating the interlock plate 12 is inserted into the transmission case 2 through the opening 2a, the interlock plate 12 abuts against the guide wall 2B before the shift and select shaft 5 engages with the first engagement portion and the second engagement portion to perform the first engagement and the second engagement, thereby restricting changes in the posture of the shift and select shaft 5 and the interlock plate 12.

[0091] That is, when the shift and select shaft 5 and the interlock plate 12 are inserted into the transmission case 2 through the opening 2a, if the position of the shift and select shaft 5 and the interlock plate 12 tries to change, the interlock plate 12 will come into contact with the guide wall 2B.

[0092] This prevents the posture of the shift and select shaft 5 and the interlock plate 12 from changing, allowing the lower rear wall 12F of the interlock plate 12 to be guided into the notched grooves 21a, 21b, 21c, and 21d of the shift yokes 21A, 21B, 21C, and 21D, and also allowing the lower end 5A of the shift and select shaft 5 to be guided into the engagement portion 2A in the correct posture.

[0093] In other words, by abutting the interlock plate 12 against the guide wall 2B, the worker can stabilize the posture and position of the shift and select shaft 5 and the interlock plate 12.Furthermore, by abutting the interlock plate 12 against the guide wall 2B, the worker can correct the posture (direction of rotation) of the interlock plate 12, thereby significantly improving the ease of assembly work.

[0094] Figure 2 shows a state in which the upper rear wall 12E of the interlock plate 12 is properly inserted into the notched groove 21d of the shift yoke 21D. In this state, the notched grooves 21a, 21b, 21c, and 21d of the shift yokes 21A, 21B, 21C, and 21D are securely engaged with the upper rear wall 12E and the lower rear wall 12F of the interlock plate 12.

[0095] During assembly work, this engaging portion is difficult for the worker to see because it is covered and hidden from view by the shift case 4. However, the worker can relatively easily see the guide wall 2B and the left front wall 12C and right front wall 12D of the interlock plate 12, which are located in front of the worker, and can adjust the positions of the shift and select shaft 5 and interlock plate 12.

[0096] That is, according to the transmission 1 of this embodiment, the lower end 5a of the shift and select shaft 5 is provided in the transmission case 2, and the lower end 5a of the shift and select shaft 5 enters and makes the first engagement.

[0097] Furthermore, according to the transmission 1 of this embodiment, the interlock plate 12 is installed inside the transmission case 2, and the interlock plate 12 enters and makes the second engagement.

[0098] In this way, the transmission 1 of this embodiment can utilize the guide wall 2B provided on the transmission case 2 to restrict changes in the orientation and rotational position of the shift and select shaft 5 and the interlock plate 12, thereby improving the ease of assembly of the shift and select shaft 5 to the transmission case 2.

[0099] As a result, finger portion 11B can be properly engaged with desired shift yokes 21A, 21B, 21C, and 21D during gear shifting, thereby improving the reliability of transmission 1.

[0100] With the shift and select shaft 5 attached to the engagement portion 2A, the detent member 13 is attached to the boss portion 2C, and the interlock plate 12 assumes a normal attachment position where it does not abut against the guide wall 2B.

[0101] Furthermore, since the upper end of the guide wall 2B is formed closer to the opening 2a than the vertical dimension of the interlock plate 12, while inserting the shift and select shaft 5 into the transmission case 2 through the opening 2a, the worker can visually check the contact state between the interlock plate 12 and the guide wall 2B from above.

[0102] Furthermore, if a problem is found with the orientation or rotational posture of the interlock plate 12, the worker can easily correct the orientation by abutting the interlock plate 12 against the guide wall 2B, thereby more effectively improving the ease of assembling the shift and select shaft 5 to the transmission case 2.

[0103] Furthermore, according to the transmission 1 of this embodiment, the guide wall 2B above the detent member 13 is slightly further forward from the shift and select shaft 5 than the guide wall 2B below the detent member 13.

[0104] As a result, as the shift and select shaft 5 moves toward the engagement portion 2A, the interlock plate 12 can be moved along the guide wall 2B toward the engagement portion 2A, and the axis O of the shift and select shaft 5 can be easily aligned with the central axis of the engagement portion 2A. This allows the shift and select shaft 5 to be smoothly inserted into the engagement portion 2A.

[0105] Furthermore, according to the transmission 1 of this embodiment, the insertion direction of the shift and select shaft 5 is along the axis O of the shift and select shaft 5. In other words, it is a vertical direction, which is easy for an operator to understand, and this improves workability.

[0106] When engaged with the shift and select shaft 5, the engaging portion 2A supports the shift and select shaft 5 so that the shaft 5 can rotate freely around the axis O, and the guide wall 2B abuts against the interlock plate 12, thereby restricting changes in the rotational position of the interlock plate 12.

[0107] In this way, even when the shift and select shaft 5 is rotatably supported by the engagement portion 2A, the guide wall 2B provided on the transmission case 2 can be used to restrict changes in the rotational orientation of the shift and select shaft 5 and the interlock plate 12, thereby improving the ease of assembly of the shift and select shaft 5 to the transmission case 2.

[0108] Furthermore, according to the transmission 1 of this embodiment, the shift and select shaft 5 is composed of a shaft member extending in the insertion direction, so that the shift and select shaft 5 needs to be moved vertically over a long distance from the time it is inserted into the transmission case 2 through the opening 2a until it engages with the engagement portion 2A.

[0109] In the transmission 1 of this embodiment, when the shift and select shaft 5 incorporating the interlock plate 12 is inserted into the transmission case 2 through the opening 2a, the interlock plate 12 abuts against the guide wall 2B before the shift and select shaft 5 engages with the engagement portion 2A, thereby preventing the posture of the shift and select shaft 5 and the interlock plate 12 from changing.

[0110] This makes it possible to reliably restrict the position of the interlock plate 12 attached to the long shift and select shaft 5 from changing.

[0111] Furthermore, according to the transmission 1 of this embodiment, the lower end 2b of the guide wall 2B and the upper end 2c of the engagement portion 2A are located at the same height, so when the shift and select shaft 5 is inserted into the transmission case 2 through the opening 2a, the interlock plate 12 can be guided along the guide wall 2B to near the engagement portion 2A.

[0112] Therefore, the change in the attitude of the shift and select shaft 5 and the interlock plate 12 can be more effectively restricted.

[0113] Furthermore, according to the transmission 1 of this embodiment, the left front wall 12C and the right front wall 12D of the interlock plate 12 have planes extending along the insertion direction of the shift and select shaft 5, and the guide wall 2B is formed on a plane extending parallel to the left front wall 12C and the right front wall 12D.

[0114] As a result, when the shift and select shaft 5 and the interlock plate 12 are inserted into the transmission case 2 through the opening 2a, the left front wall 12C and the right front wall 12D of the interlock plate 12 come into surface contact with the guide wall 2B, thereby more effectively regulating the posture of the shift and select shaft 5 and the interlock plate 12.

[0115] As a result, the ease of assembling the shift and select shaft 5 to the transmission case 2 can be improved more effectively.

[0116] (Second Example) FIG. 5 is a diagram showing a vehicle transmission according to a second embodiment of the present invention, in which the same components as those in the first embodiment are given the same reference numerals and their explanations will be omitted.

[0117] 5, a protrusion 2d is formed on the guide wall 2B. The protrusion 2d protrudes from the guide wall 2B toward the interlock plate 12 and extends in the vertical direction along the axis O of the shift and select shaft 5.

[0118] The protrusion 2d is inserted between the left front wall 12C and the right front wall 12D, and the interlock plate 12 is movable along the protrusion 2d.

[0119] That is, a groove 12c is formed in the interlock plate 12 by a left front wall 12C and a right front wall 12D, and the groove 12c extends along the insertion direction of the shift and select shaft 5. The protrusion 2d in this embodiment constitutes a guide portion.

[0120] According to the transmission 1 of this embodiment, the interlock plate 12 has a groove portion 12c extending along the insertion direction of the shift and select shaft 5, and when the shift and select shaft 5 is inserted into the transmission case 2 through the opening 2a, the protrusion 2d enters the groove portion 12c before the shift and select shaft 5 engages with the engagement portion 2A.

[0121] In other words, before the shift and select shaft 5 engages with the first engagement portion or the second engagement portion to perform the first engagement and the second engagement, the protrusion 2d enters the groove portion 12c of the interlock plate 12, thereby restricting changes in the position and posture of the shift and select shaft 5 and the interlock plate 12.

[0122] This makes it possible to restrict changes in the orientation and rotational direction of the shift and select shaft 5 and the interlock plate 12, improving the ease of assembling the shift and select shaft 5 to the transmission case 2.

[0123] Furthermore, since the shift and select shaft 5 can be guided into the engagement portion 2A with the protrusion 2d inserted into the groove 12c, the ease of assembling the shift and select shaft 5 to the transmission case 2 can be improved more effectively.

[0124] (Third Example) FIG. 6 is a diagram showing a vehicle transmission according to a third embodiment of the present invention, in which the same components as those in the first embodiment are given the same reference numerals and their explanations will be omitted.

[0125] A groove 2E is formed in the front wall 2W of the transmission case 2 facing the interlock plate 12, and the groove 2E extends vertically between the opening 2a and the engagement portion 2A along the axis O of the shift and select shaft 5. In this embodiment, the groove 2E forms a guide portion.

[0126] The left front wall 12C and the right front wall 12D are inserted into the groove portion 2E, and when the shift and select shaft 5 is inserted into the transmission case 2 through the opening 2a, the groove portion 2E sandwiches the left front wall 12C and the right front wall 12D from both the left and right sides before the shift and select shaft 5 engages with the engagement portion 2A.

[0127] In this embodiment, the left front wall 12C and the right front wall 12D form protrusions that protrude from the interlock plate 12 toward the front wall 2W of the transmission case.

[0128] According to the transmission 1 of this embodiment, the shift and select shaft 5 has a left front wall 12C and a right front wall 12D that protrude from the shift and select shaft 5 toward the front wall 2W of the transmission case 2, and when the shift and select shaft 5 is inserted into the transmission case 2 through the opening 2a, the groove portion 2E sandwiches the left front wall 12C and the right front wall 12D from both the left and right sides before the shift and select shaft 5 engages with the engagement portion 2A.

[0129] In other words, before the shift and select shaft 5 engages with the first engagement portion or the second engagement portion to perform the first engagement and the second engagement, the groove portion 2E clamps the left front wall 12C and the right front wall 12D of the interlock plate 12, thereby restricting changes in the position and posture of the shift and select shaft 5 and the interlock plate 12.

[0130] This makes it possible to restrict changes in the orientation and rotational direction of the shift and select shaft 5 and the interlock plate 12, improving the ease of assembling the shift and select shaft 5 to the transmission case 2.

[0131] Furthermore, since the shift and select shaft 5 can be guided into the engagement portion 2A with the left front wall 12C and the right front wall 12D inserted into the groove portion 2E, the ease of assembling the shift and select shaft 5 to the transmission case 2 can be improved more effectively.

[0132] Although the transmission 1 of this embodiment is configured as an AMT, the transmission 1 may also be configured as an MT (Manual Transmission).

[0133] Furthermore, although an interlock plate that abuts against the guide portion and achieves the second engagement is exemplified as the insertion part, the present invention is not limited to this and may be configured with multiple parts. That is, the abutment with the guide portion and the second engagement may be achieved by one insertion part, or the insertion part that abuts against the guide portion and the second engagement may be achieved by another insertion part.

[0134] While an embodiment of the present invention has been disclosed, it will be apparent to one skilled in the art that modifications may be made thereto without departing from the scope of the present invention, and it is intended that all such modifications and equivalents be included in the following claims. [Explanation of symbols]

[0135] 1...transmission (vehicle transmission), 2...transmission case, 2A...engagement portion (engagement portion), 2a...opening, 2B...guide wall (guide portion), 2b...lower end portion (lower end portion of guide portion), 2c...upper end portion (upper end portion of engagement portion), 2d...protrusion portion (guide portion), 2E...groove portion (guide portion), 2W...front wall (wall portion), 5...shift and select shaft (insertion member, shaft member), 5a...lower end portion (lower end portion of insertion member), 12...interlock plate (insertion part), 12C...left front wall (convex portion), 12D...right front wall (convex portion), 21d...shift yoke notch groove (engagement portion) s...gap

Claims

1. a transmission case having an opening; a shaft member extending in an insertion direction and an insertion part supported on an outer periphery of the shaft member so as to be rotatable about an axis of the shaft member, the insertion part being inserted into the transmission case through the opening, The transmission case is an engagement portion provided inside the transmission case and into which the insertion part is inserted and engaged; a guide wall formed on an inner wall of the transmission case so as to face the insertion member and extending from the opening to the engagement portion, A vehicle transmission characterized in that, when the insertion member is inserted into the transmission case through the opening, the insertion part abuts against the guide wall before the insertion member engages with the engagement portion, thereby restricting changes in the posture of the insertion member.

2. 2. The vehicle transmission according to claim 1, wherein a gap is formed between the insertion member and the guide wall when the insertion member is assembled to the transmission case in a normal position.

3. an insertion direction of the insertion member is a direction along the axis of the shaft member; 3. The vehicle transmission according to claim 1, wherein the insertion part is prevented from changing its orientation in the rotational direction by abutting against the guide wall.

4. The insertion part has a groove portion extending along the insertion direction of the insertion member, 4. The vehicle transmission according to claim 1, wherein the guide wall is configured to insert the insertion member into the groove before the insertion member engages with the engagement portion when the insertion member is inserted into the transmission case through the opening.

5. The insert part has a protrusion that protrudes from the insert part toward a wall of the transmission case, 4. The vehicle transmission according to claim 1, wherein the guide walls sandwich the protrusion from both sides before the insertion member engages with the engagement portion when the insertion member is inserted into the transmission case through the opening.

6. The insertion part has a plane extending along the insertion direction of the shaft member, 6. The vehicle transmission according to claim 1, wherein the guide wall is formed in a plane that extends parallel to a plane of the insert part.

Images