JP2010030526A - Shift device of manual transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shift device of a manual transmission capable of preventing the deterioration of the shift feeling of a shifting lever by simultaneously reducing a play and friction resistance generated between a large ball of the shifting lever and a spherical hole at a casing side for support the large ball. <P>SOLUTION: A shifting lever 13 is supported by both a large ball 13a and a spherical hole 11c of an outer member 11 provided at a casing 10 of a transmission via rolling engagement support members 15, 15A, 15B, 15C having a plurality of rolling elements 18 simultaneously subjected to rolling engagement in an oscillating manner around a select center line O1 and a shift center line O2. The rolling engagement support members form a pair, and arranged opposite to each other with respect to the center of the large ball. An outer member is divided into two by a plane 11e passing through the center of the spherical hole, and abutted on an outer side of the rolling engagement support members from both sides to hold the large ball 13a. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a shift device for a manual transmission, and more particularly to a support structure for swingably supporting a shift lever on a casing.

As a shift device of this type of manual transmission, there are those disclosed in FIG. 3 of Patent Document 1, FIG. 1 of Patent Document 2, and FIGS. 3 of Patent Document 1 shows a ball portion 5a of a change lever 5 between hemispherical support surfaces formed on a lower ball seat 3 and an upper ball seat 4 fitted to a part of a base 1, respectively. The ball sheets 3 and 4 are supported by being biased downward by a coil spring 7 provided between a part of the base 1 and the upper end portion of the upper ball sheet 4. Has been. As shown in FIG. 1 of Patent Document 2, the hemispherical large spherical portion 34 provided at the center of the shift lever 32 abuts on a resin sheet 36 provided in a part of the shift lever retainer 37. At the same time, it is pressed by a coil spring 39 from the upper side of the large sphere portion 34 and is supported so as to be swingable. 1 to 3 of Patent Document 3, the spherical portion 2 provided at the lower portion of the shift lever 1 is spherically supported by a resin-made cylindrical spherical portion supporting socket 3 that is a support member. A plurality of notches 7 are formed in the inner peripheral spherical surface portion 6 formed on the inner periphery of the spherical surface portion supporting socket 3 from the lower end 63 to the substantial center of the inner peripheral spherical surface portion 6. The lower half of 3 can be expanded by bending in the radial direction.
Japanese Unexamined Patent Publication No. 09-053708 (paragraphs [0002] to [0003], FIG. 3). Japanese Unexamined Patent Publication No. 09-210049 (paragraph [0021], FIG. 1). Japanese Patent Laying-Open No. 2005-271865 (paragraphs [0007] to [0008], FIGS. 1 to 3).

  In order to enhance the shift feeling when operating the shift lever of the shift device of the manual transmission, it is necessary to attach the large spherical portion that is the center of rotation to the casing with less play and sliding resistance. However, in the structure of Patent Document 1 described above, the ball portion of the speed change lever is rotatably supported between hemispherical support surfaces formed on the lower ball seat and the upper ball seat, and both ball seats are supported by a coil spring. The spring pressure is set to a small value so that the energy loss associated with the sliding friction between the outer surface of the ball portion and the support surface of each ball seat is not excessive due to this pressure force. If the sliding part is worn, it will be easy for rattling to occur. Conversely, if the spring pressure is set large, the rattling can be reduced, but the outer surface of the ball part and each ball seat The sliding friction resistance generated between the support lever and the support surface increases, making it difficult for the speed change lever to move. It escaped not. The situation is the same in the structure of Patent Document 2; if the pressing force by the coil spring is reduced, rattling is likely to occur. If this pressing force is increased, the sliding resistance increases. The decrease in shift feeling cannot be avoided. Further, in the structure of Patent Document 3, the lower half of the spherical portion supporting socket is bent in the radial direction during assembly, and the spherical portion is inserted therein, and then the lower half of the radially bent portion is elastically restored. If the force applied to the shift lever exceeds the limit in the direction to push the spherical portion from the spherical portion support socket, the shift lever will come out in that direction, so the shift feeling of the shift lever will be reduced I can't wear it. The object of the present invention is to solve each of these problems.

  For this purpose, in the shift device for a manual transmission according to the first aspect of the present invention, a large spherical portion formed in a part is supported concentrically with a spherical hole provided in the casing, passes through the center thereof, and is substantially orthogonal to each other. A shift lever that is swingably supported around a select center line and a shift center line, and a shift lever that is supported by a casing so as to be able to rotate and reciprocate and that is engaged with a part of the shift lever away from the large sphere. The shift and reciprocating movement is performed in the reciprocating motion or the reciprocating direction by the swinging movement around the select center line and the reciprocating motion or the reciprocating movement is performed in the reciprocating movement direction. With a select shaft, one fork shaft selected from a plurality of fork shafts by the select movement of the shift and select shaft can be used as a shift and select shaft. In a manual transmission operating mechanism configured to reciprocate by a shift movement of a gear and perform switching of the transmission gear, the transmission lever has a plurality of rolling engagements that are simultaneously rolled and engaged with both the large spherical portion and the spherical hole. A rolling engagement support member having a moving body is supported on the casing so as to be swingable around a select center line and a shift center line.

  In the shift device for a manual transmission described in the preceding paragraph, a pair of rolling engagement support members is provided, each of which has an annular shape by providing a central opening at a bottom portion of a substantially truncated cone shape, and the substantially truncated cone shape. A plurality of rolling elements are rotatably held in a plurality of holding holes formed in the inclined portion of the retainer, and a pair of rolling engagement support members are arranged on opposite sides with respect to the center of the large sphere, and The moving body is simultaneously rolled and engaged with both the large spherical portion and the spherical hole, and the spherical hole is divided into two halves by a plane and is centered on a plane which divides it into two outer members provided in the casing. It is preferable that it is formed so as to be positioned.

  In the shift device for a manual transmission described in the preceding paragraph, at least one of the retainers includes a plurality of legs protruding in an axial direction from the outer periphery of the inclined portion, and one retainer has the other end paired with the ends of the legs. It is preferable to contact a part of the retainer.

  In the shift device for a manual transmission described in the preceding paragraph, at least one of each retainer includes a plurality of projecting portions projecting in the axial direction from the outer periphery of the inclined portion, and one retainer is formed at the tip of the projecting portion. It is preferable that the retainers are engaged with a plurality of engaging portions formed on a part of the other retainer as a pair, and the both retainers are connected so as not to rotate relative to each other.

  In the shifting device for a manual transmission described in the preceding paragraph, the two rolling elements held by each retainer are arranged in two symmetrical positions with respect to the central axis of each annular retainer, and both retainers are provided on one side. It is preferable that the engaging portions are connected so that a line connecting the two rolling elements and each line connecting the two rolling elements provided on the other side cross each other in a three-dimensional manner.

  In the shift device for a manual transmission described in the preceding paragraph, it is preferable that the lines connecting the two rolling elements respectively held by the retainers are arranged so as to be three-dimensionally orthogonal to each other.

  2. The shift device for a manual transmission according to claim 1, wherein a pair of rolling engagement support members are formed in the retainer in an annular shape by providing a central opening at a bottom portion of a substantially hemispherical bowl shape, respectively. It consists of a plurality of rolling elements rotatably held in a plurality of holding holes, and a pair of rolling engagement support members are arranged opposite to each other with respect to the center of the large sphere, and each rolling element is placed on the large sphere and the spherical surface. Simultaneously rolling and engaging both of the holes, the spherical hole is divided into two halves by a plane, and the outer member provided in the casing is formed so that the center is located on the plane that divides it into two It is preferable.

  According to the present invention, the shift lever of the operation mechanism of the manual transmission is selected in the casing via the rolling engagement support member having a plurality of rolling elements that are simultaneously rolled and engaged with both the large spherical portion and the spherical hole. Since it is supported so as to be swingable around the center line and the shift center line, the resistance that prevents the relative motion generated between the large sphere of the speed change lever and the spherical hole provided in the casing is rolling friction caused by a plurality of rolling elements. Even if the surface pressure of the contact part between each rolling element and the large spherical part and the spherical hole is sufficiently large so that the play generated when each part is worn does not become excessive, the gap between the large spherical part and the spherical hole The resulting increase in frictional resistance is slight compared to the prior art in which the large sphere is supported by the sliding surface. Therefore, the play and frictional resistance generated between the large spherical portion of the speed change lever and the spherical hole provided in the casing can be reduced at the same time, so that the shift feeling of the speed change lever can be prevented from being lowered.

  One pair of rolling engagement support members is provided in a ring-shaped retainer provided with a central opening at the bottom of the substantially truncated cone-shaped bowl, and a plurality of holding holes formed in the inclined portions of the substantially truncated cone-shaped retainer. It consists of a plurality of rolling elements held rotatably, and a pair of rolling engagement support members are arranged on opposite sides with respect to the center of the large spherical part, and each rolling element is simultaneously placed on both the large spherical part and the spherical hole. The spherical hole is divided into two halves by a plane and is formed in an outer member provided in the casing so that the center is located on a plane that divides it into two. According to the invention, the pair of rolling engagement support members applied to both sides of the large sphere portion of the speed change lever may be closed in a two-divided casing and assembled to the casing. Easy assembly and disassembly of the support .

  At least one of each retainer has a plurality of legs protruding in the axial direction from the outer periphery of the inclined portion, and one retainer abuts a part of the other retainer of the other pair at the tip of each leg. According to the invention of claim 3, the tip of the leg of one retainer is brought into contact with a part of the other retainer so that the pair of annular retainers are held in parallel with each other and are not inclined relatively. Since the load applied to each rolling element is equalized, the operation of the support portion of the transmission lever is stabilized, and wear of each rolling element and the portion in contact with the rolling element can be reduced.

  At least one of each retainer has a plurality of projecting portions projecting in the axial direction from the outer periphery of the inclined portion, and one retainer is a part of the other retainer paired with the engaging portion formed at the tip of each projecting portion. According to the invention of claim 4, which engages with a plurality of engaging portions formed in the above-described manner so as to connect the both retainers so as not to rotate relative to each other. Since the member does not rotate relatively, the operation of the support portion of the speed change lever is further stabilized, and wear of each rolling element and the portion in contact with the rolling element can be further reduced.

  The two rolling elements held by each retainer are arranged in two symmetrical positions with respect to the central axis of each annular retainer, and one retainer and the other retainer connect two rolling elements provided on one side. According to the invention of claim 5, wherein the line and the line connecting the two rolling elements provided on the other side are three-dimensionally crossed with each other, each of the two rolling elements held by each retainer is a large spherical part. The four rolling elements are not on one plane with respect to the center of each other, and since the four rolling elements are not on one plane, the large spherical portion can be stably held against the spherical hole by these four rolling elements. Can do. In this way, the support structure that supports the shift lever in a stable manner and is capable of swinging while reducing the play and the frictional resistance at the same time can be configured by only four rolling elements. The structure of the joint support member 15 can be simplified and the weight can be reduced.

  According to the invention of claim 6, in which the lines connecting the two rolling elements respectively held by the retainers are arranged so as to be three-dimensionally orthogonal to each other, the load applied to each rolling element is reduced. Thus, the operation of the support portion of the transmission lever is further stabilized, and the wear of each rolling element and the portion in contact therewith can be further reduced.

  A pair of rolling engagement support members is provided, each having an annular shape by providing a central opening at the bottom of a substantially hemispherical bowl shape, and a plurality of rolling retainers rotatably held in a plurality of holding holes formed in the retainer. A pair of rolling engagement support members are arranged opposite to each other with respect to the center of the large sphere, and each rolling element is simultaneously rolled and engaged with both the large sphere and the spherical hole. According to the invention of claim 7, the outer member is divided into two halves by the outer member provided in the casing so that the center is located on a plane dividing the outer member into two parts. As in the invention, the pair of rolling engagement support members applied to both sides of the large sphere portion of the speed change lever may be closed in a two-part casing and closed and assembled to the casing. Assembling and disassembling of parts becomes easy.

  First, a first embodiment of a shift device for a manual transmission according to the present invention will be described with reference to FIG. The shift device for a manual transmission according to the first embodiment includes a shift lever 13 that is swingably supported by a casing 10 via a large spherical portion 13a formed in a part thereof, and a rotating and reciprocating movement of the casing 10. A shift-and-select shaft 20 that is freely supported and selected and shifted by the shift lever 13, and a rolling engagement support member that is interposed between the large spherical portion 13a and the spherical hole 11c and supports the large spherical portion 13a. 15.

  As shown in FIG. 1, the casing 10 includes a lower casing body 10a and a cover portion 10b covering the casing main body 10a, and a boss portion formed so as to protrude upward from a part of the cover portion 10b has a cylindrical outer shape. The outer member 11 is fitted from above. The outer member 11 of the first embodiment is divided into two upper and lower halves 11a and 11b by a plane 11e orthogonal to the center line of the cylinder, and each of the halves 11a and 11b is divided into two. A spherical hole 11c is formed on the flat surface 11e. The upper surface of the spherical hole 11c communicates with the outside through an opening 11d formed at the center of the upper half 11a. The lower part in the spherical hole 11c is communicated with the inside of the casing body 10a through the center of the lower half part 11b and the openings 11d and 10c formed in the cover part 10b. The boss portion of the cover portion 10b is formed so as to protrude slightly above the upper surface of the outer member 11, and the presser plate 12 fixed to the fastening bolt 12a on the upper end surface of the boss portion is bent slightly downward. The inner edge part is brought into contact with the upper end surface of the upper half part 11a of the outer member 11, and both half parts 11a and 11b are elastically pressed downward and fixed to the cover part 10b. The lower half portion 11b may be formed integrally with the cover portion 10b instead of being provided separately from the cover portion 10b as in this embodiment.

  The speed change lever 13 is formed by integrally forming a large ball portion 13a and an operating rod 13b and an arm portion 13c extending upward and downward from the large ball portion 13a. The large ball portion 13a is a pair of upper and lower rolling engagement support members described below. 15 is supported concentrically by the spherical hole 11c of the outer member 11 through 15 (the degree of freedom of rotation is 3), and is held so as to be swingable around the neutral position shown in the figure. A knob for manual shifting operation is provided at the upper end portion of the operation rod 13b extending upward from the large sphere portion 13a through the opening 11d formed in the upper half portion 11a of the outer member 11, and the large sphere portion 13a is provided with a knob. The arm portion 13c that is integrally provided and extends downward enters the casing body 10a through the opening 11d of the lower half portion 11b and the opening 10c of the casing 10, and is connected to the joint member 21 at the tip thereof away from the large ball portion 13a. A small ball portion 13d connected to the shift-and-select shaft 20 is formed.

  The rolling engagement support members 15 of the first embodiment are paired as a pair, each of which has an annular retainer 16 provided with a central opening 16a at the bottom of the truncated cone shape, and an inclined portion of the truncated cone retainer 16. And the same number of steel balls (rolling elements) 18 rotatably held in a plurality of (for example, eight) holding holes 17 formed at equal angular intervals along the circumferential direction. In this embodiment, the pair of rolling engagement support members 15 are arranged up and down in contrast to each other with respect to the center of the large sphere portion 13a, and the operation rod 13b and the arm portion 13c are arranged at the center opening 16a and the cover portion of each retainer 16. The ball 18 extends vertically through the opening 10c of 10b, and the respective balls 18 are simultaneously rolled and engaged with both the outer surface of the large spherical portion 13a and the inner surface of the spherical hole 11c.

  The shift and select shaft 20 is disposed in the casing body 10a in a horizontal direction substantially orthogonal to the speed change lever 13 in the neutral position shown in FIG. 1, and is supported by the casing 10 so as to be able to rotate and reciprocate. A socket 21a formed eccentrically with a joint member 21 fixed at one end via a knock pin 21c is provided with a sliding body 21b so as to be slidable in the radial direction. A small spherical portion 13d at the tip of 13c is rotatably connected.

  In the first embodiment, the shift and select shaft 20 provided with the joint member 21 is assembled in the casing body 10 a to close the cover portion 10 b, and a pair of rolling engagements on both the upper and lower sides of the large ball portion 13 a of the speed change lever 13. The member to which the support member 15 is applied is placed in the lower half portion 11b of the outer member 11 provided in the boss portion of the cover portion 10b, and when this is inserted, it is engaged with the small ball portion 13d at the tip of the arm portion 13c. The sliding body 21 b is inserted into the socket portion 21 a of the joint member 21 to connect the speed change lever 13 to the shift and select shaft 20. Then, the upper half portion 11a of the outer member 11 is covered and closed from the upper side of the large ball portion 13a and the rolling engagement support member 15, and is fastened and fixed to the boss portion of the cover portion 10b by the holding plate 12 and the fastening bolt 12a. The shift device of the manual transmission is assembled.

  If the shift lever 13 of the shift device of the manual transmission is swung around the select center line O1 extending in parallel with the center axis of the shift and select shaft 20 through the center of the large ball portion 13a, the arm portion 13c A shift-and-select shaft 20 connected to the speed change lever 13 via the small ball portion 13d and the sliding member 21b of the joint member 21 is rotated in the select direction as indicated by reference numeral X, and a plurality of speed change gears are respectively switched. One fork shaft is selected from the fork shafts (not shown). Next, if the shift lever 13 is swung around a horizontal shift center line O2 orthogonal to the select center line O1 as indicated by reference numeral Y, the shift and select shaft 20 connected to the shift lever 13 is indicated by reference numeral Y1. The shift gear is switched by moving the selected fork shaft in the axial direction.

  According to the first embodiment described above, the speed change lever 13 has the rolling engagement support member 15 having the plurality of balls 18 that are simultaneously rolled and engaged with both the large spherical portion 13a and the spherical hole 11c of the outer member 11. And is supported by the casing 10 so as to be swingable about the select center line O1 and the shift center line O2, and between the large spherical portion 13a of the speed change lever 13 and the spherical hole 11c of the outer member 11 provided in the casing 10. Since the resistance that prevents the relative rotation that occurs is rolling friction caused by the plurality of balls 18, the value thereof is considerably smaller than the sliding friction in each of the above-described conventional techniques. Accordingly, the surface pressure of the contact portion between each ball 18 and the large spherical portion 13a and the spherical hole 11c is sufficiently set so as not to cause excessive play even if wear occurs in each ball 18 and each portion in contact therewith. Even if it increases, the increase in the frictional resistance generated between the large sphere portion 13a and the spherical hole 11c is slight compared to the conventional case. Therefore, since the play and frictional resistance generated between the large sphere portion 13a of the speed change lever 13 and the spherical hole 11c of the outer member 11 provided in the casing 10 can be reduced at the same time, the shift feeling of the speed change lever 13 is lowered. This can be prevented.

  In the first embodiment, a pair of rolling engagement support members 15 applied to the upper and lower sides of the large sphere portion 13a of the speed change lever 13 are placed in the lower half portion 11b of the outer member 11 provided in the casing 10. The upper half portion 11a of the outer member 11 is put on and closed from the upper side and closed and assembled to the casing 10, so that the support portion of the speed change lever can be easily assembled and disassembled.

  In the first embodiment shown in FIG. 1, each rolling engagement support member 15 is arranged above and below the large sphere portion 13a. However, each large sphere portion 13a is provided on both the left and right sides of the large sphere portion 13a as shown in FIG. It may be arranged. In that case, the upper and lower operation rods 13b and the arm portion 13c are disposed between the retainers 16 of the left and right rolling engagement support members 15.

  In 1st Embodiment shown in FIG. 1, the annular retainer 16 of each rolling engagement support member 15 is described in the state arrange | positioned in parallel mutually according to coaxial. However, the operating rod 13b and the arm portion 13c extending vertically from each large ball portion 13a pass through the center opening 16a of the retainer 16 of each of the upper and lower rolling engagement support members 15 with a considerable gap, and this gap is formed. Since the upper and lower rolling engagement support members 15 are relatively rotatable around the center of the large spherical portion 13a within the allowable range, the respective annular retainers 16 can be relatively inclined. When such a relative inclination occurs, the arrangement of the balls 18 on the large sphere portion 13a becomes uneven, so the load applied to each ball 18 becomes uneven, and the balls 18, the large sphere portion 13a, and the spherical surface There is a problem that the wear of the portion of the hole 11c that contacts the ball 18 becomes uneven. The first modification of the rolling engagement support member shown in FIG. 3 is for solving such a problem.

  The retainer 16A of each rolling engagement support member 15A of the first modification shown in FIG. 3 has two pieces projecting in the axial direction from positions spaced by 180 degrees in the circumferential direction of the outer periphery of the inclined portion. Legs 16b are formed. In a state where such a pair of retainers 16A is combined with the use state as shown in FIG. 3, the tips of the respective leg portions 16b come into contact with the outer periphery of the inclined portion of the other retainer 16A as a pair. ing. In this way, the tip of each leg portion 16b of the retainer 16 is brought into contact with the end face of the outer periphery of the inclined portion of the other retainer 16A in the pair from the axial direction so as not to approach any more, so a pair of annular The retainers 16 are held parallel to each other and do not tilt relatively. As a result, the pair of annular retainers 16A are held in parallel with each other and are not inclined relative to each other. Therefore, the load applied to each ball 18 is equalized, so that the operation of the shift lever support is stabilized. In addition, it is possible to reduce wear of each ball 18 and a portion in contact therewith. The number of leg portions 16b provided on one rolling engagement support member 15A is arbitrary as long as it is two or more.

  Further, in each of the pair of rolling engagement support members 15 and 15A of the first embodiment and the first modification described above, 16 balls 18 are used, but one of the second modification shown in FIG. In the pair of rolling engagement support members 15B, the number of balls 18 used is reduced to four. The retainer 16B of each rolling engagement support member 15B according to the second modified example has a position of 90 degrees in the circumferential direction of the outer periphery of the inclined portion from the position of the first modified example shown in FIG. Four leg portions 16c shorter than the leg portions 16b are formed to project in the axial direction, and engaging portions 16d are formed at the tips of the projecting portions 16c. Steel balls (rolling elements) 18 are rotatably held in the two holding holes 17 formed at positions on the inclined portions that are symmetrical with respect to the central axis of the annular retainer 16B. As shown in FIG. 4, the retainer 16B of each rolling engagement support member 15B is disposed on the opposite side of the large ball portion 13a of the transmission lever 13 and assembled to the engagement portion 16d at the tip of each protrusion 16c. Are engaged with each other, the retainers 16B are connected so as not to rotate relative to each other, and the lines connecting the two balls 18 respectively held by the retainers 16B are arranged so as to be three-dimensionally orthogonal to each other.

  As described above, the two rolling elements 18 held by the retainers 16B are arranged on the opposite sides with respect to the center of the large spherical portion 13a, and the four rolling elements 18 in total are not on one plane. Therefore, the four rolling elements 18 can stably hold the large spherical portion 13a with respect to the spherical hole 11c. Thus, the support structure for supporting the speed change lever 13 can be configured by only four rolling elements 18 so that the speed change lever 13 is supported in a stable manner, with the play and the frictional resistance being reduced simultaneously. The structure can be simplified and the weight can be reduced. In the second modification, the lines connecting the two rolling elements 18 respectively held by the retainers 16B are arranged so as to be three-dimensionally orthogonal to each other. Since the arrangement of the four balls 18 is equalized, and the load applied to each ball 18 is also equalized and reduced, the operation of the support portion of the speed change lever is stabilized, and each ball 18 and the ball 18 are in contact with each other. The wear of the part can be reduced. However, the present invention is not limited to this, and the lines connecting the two rolling elements 18 may intersect three-dimensionally at an angle other than a right angle.

  In the first modification shown in FIG. 3, the pair of retainers 16A can be rotated relative to each other within a certain angular range. However, as in the second modification shown in FIG. Relative rotation may be prevented by forming irregularities that are engaged with each other on a part of the outer periphery of the inclined portion of the other retainer 16 </ b> A that is in contact with.

  Next, the second embodiment shown in FIG. 5 will be described. In this second embodiment, the rolling engagement support member 15C and the outer member 11A are different from the rolling engagement support members 15, 15A, 15B and the outer member 11 of the first embodiment including the modified examples. The joint support member 15C and the outer member 11A will be described, and other descriptions will be omitted.

  The outer member 11A of the second embodiment is the same cylindrical shape as the outer member 11 of the first embodiment, but is a plane including a center line of a cylinder extending in the vertical direction (in FIG. 5, hidden behind the shift lever 13). ) And divided into two left and right halves 11Aa and 11Ab. Similarly to the first embodiment, each of the halves 11Aa and 11Ab has a spherical surface formed by combining a hemisphere of the same radius whose center is located on the dividing plane. A hole 11Ac is formed, the upper part in the spherical hole 11Ac communicates with the outside through an opening 11Ad formed in the upper part of the outer member 11A, and the lower part in the spherical hole 11Ac is formed in the lower part of the outer member 11A and the cover part 10b. The casing body 10a communicates with the openings 11Ad and 10c. 11A of outer members are attached in the boss | hub part of the cover part 10b with the presser plate 12 and the fastening bolt 12a similarly to 1st Embodiment.

  A pair of rolling engagement support members 15C of the second embodiment are provided as a pair, each having a substantially hemispherical bowl-shaped bottom with a center opening 16Ca provided in an annular shape, and the retainer 16C along the circumferential direction, etc. It consists of the same number of steel balls (rolling elements) 18 rotatably held in a plurality of holding holes 17 formed in two rows at angular intervals. Similarly to the first embodiment, in this second embodiment, the pair of rolling engagement support members 15C are arranged above and below each other with respect to the center of the large spherical portion 13a, and the operation rod 13b and the arm portion 13c are provided for each retainer 16. The ball 18 extends vertically through the center opening 16Ca, and each ball 18 is simultaneously rolled and engaged with both the outer surface of the large spherical portion 13a and the inner surface of the spherical hole 11c.

  In the second embodiment, a pair of rolling engagement support members 15C is applied to both the upper and lower sides of the large sphere portion 13a of the transmission lever 13, and the half portions 11Aa and 11Ab of the outer member 11A are applied to both sides thereof. At the same time, the sliding body 21b engaged with the small ball portion 13d at the tip of the arm portion 13c is inserted into the socket portion 21a of the joint member 21 to insert the speed change lever 13 into the seat and select shaft. 20 is connected. Then, the shift device of the manual transmission is assembled by tightening and fixing the outer member 11A to the boss portion of the cover portion 10b by the presser plate 12 and the fastening bolt 12a.

  Similar to the first embodiment, also in the second embodiment, the speed change lever 13 is a rolling engagement having a plurality of balls 18 that are simultaneously rolled and engaged with both the large spherical portion 13a and the spherical hole 11Ac of the outer member 11A. The support member 15C is supported by the casing 10 so as to be swingable around the select center line O1 and the shift center line O2, and the spherical ball of the outer member 11A provided in the casing 10 and the large spherical portion 13a of the speed change lever 13 is supported. Since the resistance that prevents the relative rotation that occurs during 11Ac is rolling friction caused by the plurality of balls 18, its value is small. Accordingly, the surface pressure of the contact portion between each ball 18 and the large spherical portion 13a and the spherical hole 11Ac is sufficiently set so that the play is not excessive even if wear occurs in each ball 18 and each portion in contact with this. Even if it is large, the increase in the frictional resistance generated between the large spherical portion 13a and the spherical hole 11Ac is slight. Therefore, since the play and frictional resistance generated between the large sphere portion 13a of the speed change lever 13 and the spherical hole 11Ac of the outer member 11A provided in the casing 10 can be reduced at the same time, the shift feeling of the speed change lever 13 is lowered. This can be prevented.

  Also in the second embodiment, a pair of rolling engagement support members 15C is applied to the left and right sides of the large sphere portion 13a of the speed change lever 13, and the halves 11Aa and 11Ab of the outer member 11A are applied to both sides thereof. Since it suffices to put it in the boss part of the cover part 10b and assemble it to the casing 10 by the presser plate 12 and the fastening bolt 12a, the assembling and disassembling of the support part of the shift lever is easy.

It is sectional drawing which shows the structure of the principal part of 1st Embodiment of the shift apparatus of the manual transmission by this invention. It is sectional drawing which shows the partial modification of 1st Embodiment shown in FIG. It is sectional drawing which shows the 1st modification of the rolling engagement support member of 1st Embodiment shown in FIG. It is sectional drawing which shows the 2nd modification of the rolling engagement support member of 1st Embodiment shown in FIG. It is sectional drawing which shows the structure of the principal part of 2nd Embodiment of the shift apparatus of the manual transmission by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Casing, 11, 11A ... Outer member, 11a, 11b ... Half part, 11c, 11Ac ... Spherical hole, 11e ... Plane, 13 ... Shift lever, 13a ... Large ball part, 15, 15A, 15B, 15C ... Rolling engagement Joint support member 16, 16A, 16B, 16C ... Retainer, 16a ... Center opening, 16b ... Leg part, 16c ... Projection part, 16d ... Engagement part, 17 ... Holding hole, 18 ... Rolling body (ball), 20 ... Shift and select shaft, O1 ... select center line, O2 ... shift center line.

Claims (7)

A shift in which a large spherical portion formed in part is supported concentrically with a spherical hole provided in the casing, and is swingably supported around a select center line and a shift center line that are substantially orthogonal to each other through the centers. The lever is supported by the casing so as to be able to rotate and reciprocate and is engaged with a part away from the large sphere portion of the speed change lever, and is rotated or swung around the select center line of the speed change lever. A shift-and-select shaft that is selectively moved in the reciprocating direction and shifted in the reciprocating or rotating direction by swinging around the shift center line of the same shift lever;
A manual transmission configured to switch a transmission gear by reciprocating one fork shaft selected from a plurality of fork shafts by a selection movement of the shift and selection shaft by a shift movement of the shift and selection shaft. In the operation mechanism,
The shift lever swings around the select center line and the shift center line through the rolling engagement support member having a plurality of rolling elements that are simultaneously rolled and engaged with both the large spherical portion and the spherical hole. A shift device for a manual transmission, which is freely supported.   2. The shift device for a manual transmission according to claim 1, wherein the rolling engagement support members are paired and each has a ring-shaped retainer provided with a central opening at a bottom portion of a substantially truncated cone shape, and the substantially conical shape. The plurality of rolling elements are rotatably held in a plurality of holding holes formed in inclined portions of a trapezoidal retainer, and the pair of rolling engagement support members are opposite to each other with respect to the center of the large sphere portion. The rolling elements are simultaneously rolled and engaged with both the large spherical portion and the spherical hole, and the spherical hole is divided into two halves by a plane and is attached to an outer member provided in the casing. A shift device for a manual transmission, wherein the center is formed on the plane that divides the gear into two.   3. The shift device for a manual transmission according to claim 2, wherein at least one of the retainers includes a plurality of legs protruding in an axial direction from an outer periphery of the inclined portion, and the one retainer has a tip of the leg. A shift device for a manual transmission, wherein the shift device is in contact with a part of a pair of other retainers.   The shift device for a manual transmission according to claim 2, wherein at least one of the retainers includes a plurality of projecting portions projecting in an axial direction from an outer periphery of the inclined portion, and the one retainer is provided at a tip of the projecting portion. A shift device for a manual transmission, characterized in that the formed engaging portion is engaged with a plurality of engaging portions formed in a part of the other retainer of the pair, and the both retainers are connected so as not to be relatively rotatable.   5. The shift device for a manual transmission according to claim 4, wherein two rolling elements held by each retainer are arranged in two symmetrical positions with respect to a central axis of each annular retainer, and the both retainers are The line connecting the two rolling elements provided on one side and the lines connecting the two rolling elements provided on the other side are connected by the respective engaging portions so as to cross each other three-dimensionally. Shift device for manual transmission.   6. The manual transmission shift device according to claim 5, wherein the lines connecting the two rolling elements respectively held by the retainers are arranged so as to be three-dimensionally orthogonal to each other. Machine shift device.   The shift device for a manual transmission according to claim 1, wherein the rolling engagement support members are formed as a pair, each having an annular shape by providing a central opening at a bottom portion of a substantially hemispherical bowl shape, and the retainer A plurality of rolling elements rotatably held in the plurality of holding holes, and a pair of the rolling engagement support members are arranged on opposite sides with respect to the center of the large spherical portion, and each rolling element is The large spherical portion and the spherical hole are simultaneously rolled and engaged, and the spherical hole is divided into two halves by a plane, and the outer member provided in the casing is divided into two on the plane. A shift device for a manual transmission, characterized in that the center is formed.

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