JP6337755B2 - Manual transmission - Google Patents

Description

  The present invention relates to a manual transmission mounted in an automobile, and belongs to the technical field of an automobile transmission.

  A manual transmission mounted on an automobile includes a plurality of gear trains provided with a plurality of gear trains having different gear ratios between a primary shaft connected to an engine via a clutch and a secondary shaft coupled to a drive wheel. A plurality of forward shift stages and one reverse shift stage are achieved by selectively setting one of the gear trains to a power transmission state.

  The operation of selectively transmitting one gear train out of the plurality of gear trains is performed by the movement of the shift fork interlocked with the operation of the change lever by the driver, by the synchronous meshing device adjacent to the gear train. This is done by sliding the sleeve toward the gear train side.

  Specifically, the shift fork is connected to a plurality of shift rods arranged in parallel and provided for each synchronous meshing device, and the shift rod selected by the change lever selection operation is connected to the shift lever shift lever. The shift fork attached to the shift rod is moved by operation to slide the sleeve of the synchronous meshing device, and the primary shaft or the secondary shaft and the gear loosely fitted on the shaft are coupled in synchronization. Is done.

  In the manual transmission, the change lever, which is manually operated by the driver, can be rotated in the select direction and the shift direction via a spherical bearing at the middle part of the change lever on the control case disposed at the top of the transmission case. The change lever is provided with a plurality of shift boots having one end attached to the change lever side and the other end attached to the transmission case or the vehicle body side in the vicinity of the upper portion of the control case. Those are known (for example, see Patent Document 1).

JP-A-8-202466

  However, as described in Patent Document 1, for example, if a plurality of shift boots are attached to the change lever in the vicinity of the upper portion of the control case, for example, when the change lever is pushed down, If the structure around the control case is complicated, as in the case of adopting a push-type reverse mechanism that allows the select operation and shift operation to the reverse gear, the space near the spherical bearing is limited. In such a case, it is considered that the space around the control case cannot be effectively used, and therefore at least one of the shift boots is abolished.

  When the shift boot is formed using an elastic member such as rubber and is provided so as to follow the movement of the change lever in the selection direction and the shift direction, if at least one of the shift boots is abolished, the change boot Since the resistance due to the shift boot is reduced during the lever selection operation and the shift operation, the operation force required during the selection operation and the shift operation is reduced.

  It is not a problem that the operating force required for the select operation is reduced during the select operation of the change lever, but if the operating force required for the shift operation is reduced during the shift lever shift operation, the operating force required for the shift operation is synchronized. There is a risk that the shift feeling will deteriorate after the synchronization by the meshing device.

  Therefore, the present invention provides a manual transmission that can suppress a sudden increase in operating force required for a shift operation after synchronization by a synchronous meshing device and can obtain a good shift feeling. Is an issue.

  In order to solve the above problems, a manual transmission according to the present invention is configured as follows.

First, the invention according to claim 1 of the present application is a change lever that is manually operated by a driver, and is engaged with the change lever and moves in the axial direction when the change lever is shifted, and the change lever is selected. A control rod that rotates in the circumferential direction during operation, and a sleeve that slides in conjunction with the shift operation of the change lever to synchronize a loose fitting gear and a shaft on which the loose fitting gear is loosely fitted. In addition, the manual transmission is provided with a synchronous meshing device for setting a predetermined shift speed to a power transmission state, and the control rod moves in the axial direction when the change lever is shifted in the transmission case. includes a biasing mechanism for biasing the control rod and in the opposite direction the moving direction of the axial direction of the control rod by the shift operation when the The urging mechanism is configured so that the urging force acts on the control rod after the sleeve is engaged with the loose fitting gear after the synchronization by the synchronizing engagement device and until it comes into contact with the stopper that regulates the stroke of the sleeve. It is configured .

According to a second aspect of the present invention, in the manual transmission according to the first aspect, the urging mechanism is configured such that the control rod moves when the control rod moves in an axial direction during a shift operation of the change lever. And an elastic member that urges the control rod in a direction opposite to the axial movement direction of the control rod by a shift operation by elastically deforming in the axial direction .

According to a third aspect of the present invention, in the manual transmission according to the second aspect, the elastic member is configured such that the control rod moves from the neutral position to one side and the other side in the axial direction when the change lever is shifted. It is provided that the control rod is urged in the direction opposite to the moving direction of the control rod when it is moved in any direction.

According to a fourth aspect of the present invention, in the manual transmission according to the second or third aspect , the elastic member is formed by a leaf spring.
According to a fifth aspect of the present invention, there is provided a change lever that is manually operated by a driver, and is engaged with the change lever so as to move in the axial direction when the change lever is shifted and when the change lever is selected. A manual transmission having a control rod that rotates in a circumferential direction, wherein the control rod is moved into the transmission case when the control rod moves in an axial direction when the change lever is shifted. An urging mechanism for urging the control rod in a direction opposite to an axial movement direction, wherein the urging mechanism is configured such that the control rod moves when the control rod moves in the axial direction during a shift operation of the change lever. Axial direction of the control rod by shift operation by elastically deforming in the axial direction An elastic member that urges the control rod in a direction opposite to the moving direction is provided, and an accommodation portion that accommodates an engagement portion between the change lever and the control rod is formed in the transmission case. It is arrange | positioned in the said accommodating part in the state fitted by the outer periphery of the said control rod, It is characterized by the above-mentioned.

With the above configuration, according to the first aspect of the present invention, the change lever, the control rod that moves in the axial direction at the time of the shift operation and rotates in the circumferential direction at the time of the select operation, and the shift operation of the change lever In a manual transmission having a synchronous meshing device for synchronizing and coupling a loose fitting gear and a shaft on which the loosely fitting gear is loosely fitted by sliding a sleeve in conjunction , the urging mechanism for urging the control rod by the shift operation in the opposite direction to the moving direction of the axial direction of the control rod is provided when the control rod during the shift operation of the change lever is moved in the axial direction, the biasing mechanism The urging force is applied to the control rod between the time when the sleeve is engaged with the loose-fitting gear and the time when it is in contact with the stopper after the synchronization by the synchronization engagement device. It is configured to use. As a result, the shift operation is performed against the biasing force in the direction opposite to the movement direction of the control rod, so that the operation force required for the shift operation is prevented from abruptly increasing after synchronization by the synchronous meshing device. And a good shift feeling can be obtained.

According to a second aspect of the present invention, the biasing mechanism biases the control rod in a direction opposite to the axial movement direction of the control rod by a shift operation by elastically deforming in the axial direction of the control rod. By providing the elastic member, the control rod can be urged in the direction opposite to the moving direction of the control rod by elastic deformation of the elastic member, and the above effect can be effectively obtained with a relatively simple configuration. .

According to a third aspect of the present invention, the elastic member can be used even when the control rod is moved from the neutral position to either the one side or the other side during the shift operation of the change lever. By disposing the control rod in the direction opposite to the moving direction, it is possible to suppress variations in shift feeling during a shift operation in which the control rod is moved to one side in the axial direction and the other side in the axial direction. , The effect can be achieved more effectively.

According to the invention described in claim 4 , since the elastic member is formed of a leaf spring, the effect can be specifically realized with a relatively simple configuration.
According to a fifth aspect of the present invention, there is provided a manual transmission including a change lever and a control rod that moves in the axial direction during a shift operation and rotates in a circumferential direction during a select operation. In addition, an urging mechanism for urging the control rod in a direction opposite to the movement direction of the control rod in the axial direction by the shift operation when the control rod moves in the axial direction during the shift operation of the change lever is provided. As a result, the shift operation is performed against the biasing force in the direction opposite to the movement direction of the control rod, so that the operation force required for the shift operation is prevented from abruptly increasing after synchronization by the synchronous meshing device. And a good shift feeling can be obtained.
The urging mechanism includes an elastic member that urges the control rod in a direction opposite to the axial movement direction of the control rod by a shift operation by elastically deforming in the axial direction of the control rod. The control rod can be biased in the direction opposite to the moving direction of the control rod by elastic deformation of the member, and the above-described effect can be effectively obtained with a relatively simple configuration.
In addition, the transmission case is formed with an accommodating portion for accommodating the engaging portion between the change lever and the control rod, and the elastic member is disposed in the accommodating portion in a state fitted to the outer periphery of the control rod. Since the elastic member can be fitted on the outer periphery of the control rod and disposed in the accommodating portion for accommodating the engaging portion between the change lever and the control rod, a space for arranging the elastic member is separately provided in the transmission case. The elastic member can be easily assembled without necessity.

It is sectional drawing which shows a part of manual transmission which concerns on 1st Embodiment of this invention. It is the principal part enlarged view to which the principal part of the manual transmission shown in FIG. 1 was expanded. It is a figure which shows a part of manual transmission seen from the Y3 direction in FIG. It is a perspective view which shows the elastic member of the said manual transmission. It is explanatory drawing for demonstrating the state by which shift operation was carried out in the said manual transmission. It is sectional drawing which shows a part of manual transmission which concerns on 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a cross-sectional view showing a part of the manual transmission according to the first embodiment of the present invention, and FIG. 2 is an enlarged view of a main part of the main part of the manual transmission shown in FIG. A manual transmission 1 according to an embodiment of the present invention is of a vertical type mounted on a vehicle such as a front engine or a rear drive vehicle in which an input shaft and an output shaft are arranged on the same axis.

  Although not shown, the manual transmission 1 includes an input shaft connected to an engine drive shaft via a clutch, an output shaft disposed on the same axis as the input shaft, and the input shaft and the output shaft. The input shaft, the output shaft, and the counter shaft are rotatably supported by the transmission case 10 via a bearing or the like.

  A plurality of gear trains having different gear ratios are provided between the input shaft, the output shaft, and the counter shaft, and one gear train is selectively set in a power transmission state from the plurality of gear trains. As a result, the input shaft and the output shaft are directly connected to form a power transmission state, whereby a predetermined gear stage is achieved.

  Further, the manual transmission 1 is provided with a synchronous meshing device for setting a predetermined shift speed to a power transmission state, and the sleeve of the synchronous meshing device is moved by a shift fork that is interlocked with the operation of the change lever 20. By sliding, the input shaft, the output shaft or the counter shaft and the gear loosely fitted to the shaft are coupled in synchronism with each other, so that a predetermined gear stage is achieved.

  As shown in FIG. 1, the manual transmission 1 is engaged with a change lever 20 that is manually operated by a driver, and the change lever 20. The manual transmission 1 moves in the axial direction when the change lever 20 is shifted, and the change lever 20. The control rod 30 that rotates in the circumferential direction at the time of the selection operation is selectively coupled to the control rod 30 by the circumferential rotation of the control rod 30 at the time of the selection operation of the change lever 20. And a plurality of shift rods 40 that move along with the movement.

  The change lever 20 is in a direction orthogonal to each lane direction according to a shift pattern including, for example, a shift lane for 1-2 speed, a shift lane for 3-4 speed, a shift lane for 5-6 speed, and a reverse shift lane. A selection operation and a shift operation are performed by moving in the selection direction and the shift direction which is the direction of each lane.

  The change lever 20 includes a first lever member 21 for operating the control rod 30, and a second lever member 23 coaxially connected to the first lever member 21 and connected to the first lever 21 via an elastic bush 22. And a change knob 24 attached to the second lever member 23.

  The first lever member 21 is formed at one end to support the second lever member 23, and is formed at a substantially central portion in the axial direction of the first lever member 21. The first spherical portion 21 b supported by the control case 15 attached to the upper surface of the case 10 and the second spherical portion 21 c formed at the other end and connected to the control rod 30 are provided.

  The first spherical portion 21b of the first lever member 21 is connected to the control case 15 via a spherical bearing member 16 provided in the control case 15 with a spherical concave portion that holds the spherical surface of the first spherical portion 21b. It is supported. Thereby, the 1st lever member 21 can incline centering on the 1st spherical part 21b.

  A fixing member 17 is fixed to the control case 15 using fastening bolts 18. The fixing member 17 includes an opening 17a into which the change lever 20 is inserted, and is disposed above the spherical bearing member 16 so as to fix the spherical bearing member 16.

  The fixing member 17 is also positioned in an opening 2a formed in the tunnel portion 2 that extends in the vehicle body front-rear direction provided in the center portion of the vehicle body floor in the vehicle width direction, and between the fixing member 17 and the tunnel portion 2. A first rubber cover member 3 is attached. A rubber second cover member 6 is attached above the first cover member 3 between the change lever 20 and the tunnel portion 2. A resin interior member 4 is disposed on the inner side of the tunnel portion 2, and a change lever 20 is inserted into an opening 4 a formed in the interior member 4, so that the interior member 4 and the change lever 20 A third cover member 5 made of leather is attached therebetween.

  The second spherical portion 21 c of the first lever member 21 is connected to the control rod 30 via the connecting member 31. The connecting member 31 is positioned on the control rod 30 by the pin member 32, and as shown in FIG. 2, the first cylindrical portion 31a extending along the outer periphery of the control rod 30, and extending upward from the first cylindrical portion 31a. When the change lever 20 is in the neutral position, a second cylindrical portion 31b having a center line coaxial with the change lever 20 is provided.

  The second spherical portion 21 c of the first lever member 21 is held in the second cylindrical portion 31 b of the connecting member 31. Accordingly, when the change lever 20 is moved in the selection direction or the shift direction, the second spherical portion 21c of the first lever member 21 moves in the second cylindrical portion 31 of the connecting member 31, and the control rod 30 is moved in the selection direction. And move in the shift direction.

  The connecting member 31 also includes a protruding portion 31c that protrudes downward from the first cylindrical portion 31a. The rear portion of the transmission case 10 accommodates an engaging portion 25 between the change lever 20 and the control rod 30 constituted by the second spherical portion 21 c of the first lever member 21 and the second cylindrical portion 31 b of the connecting member 31. An accommodating portion 11 is formed, and the protruding portion 31 c is disposed in the accommodating portion 11.

  The accommodating portion 11 formed in the transmission case 10 is formed to be recessed in a substantially rectangular shape from the upper surface of the transmission case 10, and includes a bottom surface portion 11a, a side surface portion 11b on the vehicle body front side, and a side surface portion 11c on the vehicle body rear side. And. A boss portion 11d extending upward from the bottom surface portion 11a is provided on the bottom surface portion 11a, and a guide plate 13 is fixed to the boss portion 11d using a fastening bolt 12.

  The control rod 30 is supported by the transmission case 10 and moved in the circumferential direction and the axial direction of the control rod 30 in conjunction with the movement in the select direction and the shift direction of the change lever 20 that is manually operated by the driver. It is like that.

  The control rod 30 is selectively engaged via a plurality of shift rods 40 and a gate mechanism 45 each having a shift fork engaged with the change lever 20 at one end and engaged with a sleeve of the synchronous meshing device at the other end. Connected.

  The gate mechanism 45 includes an engagement member 41 attached to the rear end side of each shift rod 40, and a select member 33 attached to the front end side of the control rod 30 to selectively engage with the engagement member 41. The control rod 30 is selectively engaged with any one of the plurality of shift rods 40.

  The select member 33 includes a select arm portion 33 a extending in a direction orthogonal to the axial direction of the control rod 30. Each engaging member 41 is formed with a select gate portion 41a for engaging with the select arm portion 33a, and each select gate portion 41a of the select arm portion 33a is moved by the circumferential movement of the control rod 30. It is provided so that it may be located on a track.

  When the selection operation of the change lever 20 is executed, the control rod 30 rotates in the circumferential direction, and the selection arm portion 33a of the selection member 33 is one of the engagement members 41 provided on the plurality of shift rods 40, respectively. It selectively engages with the select gate portion 41a.

  If the shift operation of the change lever 20 is executed while the select arm portion 33a is engaged with the select gate portion 41a of any of the engaging members 41, the select arm portion 33a is engaged. The shift rod 40 provided with the member 41 is moved in the axial direction. As a result, the shift fork attached to the shift rod 40 is moved in the axial direction and the sleeve of the synchronous meshing device is moved in the axial direction. As described above, the input shaft, the output shaft or the counter shaft and the shaft A predetermined gear is achieved by synchronizing and coupling the loosely fitted gears.

  In the manual transmission 1 according to this embodiment, as shown in FIGS. 1 and 2, the control rod 30 is moved into the transmission case 10 when the control rod 30 moves in the axial direction when the change lever 20 is shifted. An urging mechanism 50 that urges the control rod 30 in a direction opposite to the moving direction is provided.

  When the sleeve of the synchronous meshing device is moved in the axial direction by the shift operation of the change lever 20, the urging mechanism 50 regulates the stroke of the sleeve after the sleeve meshes with the loose fitting gear after synchronization. The control rod 30 is configured to be biased in the direction opposite to the moving direction of the control rod 30 until it comes into contact with the stopper.

  Specifically, the urging mechanism 50 is elastically deformed in the axial direction of the control rod 30 when the control rod 30 moves in the axial direction during the shift operation of the change lever 20, so that the urging mechanism 50 is opposite to the moving direction of the control rod 30. It is comprised by the elastic member 51 which urges | biases the control rod 30 to.

  3 is a view showing a part of the manual transmission as viewed from the Y3 direction in FIG. 2, and FIG. 4 is a perspective view showing an elastic member of the manual transmission. As shown in FIG. 4, the elastic member 51 is formed by a plate spring using a plate-like material, and has a flat plate portion 52 formed in a substantially rectangular shape, and one side and the other side in the longitudinal direction of the flat plate portion 52. A first inclined portion 53 and a second inclined portion 54 are provided that extend outward from the end portion by a predetermined angle θ from a direction orthogonal to the flat plate portion 52.

  The flat plate portion 52 is formed longer in the axial direction of the control rod 30 than the connecting member 31 attached to the control rod 30, and the first inclined portion 53 and the second inclined portion 54 are fitted to the control rod 30, respectively. Holes 53a and 54a having an inner diameter larger than the outer diameter of the control rod 30 are formed so that they can be matched.

  The elastic member 51 is a state in which the connecting member 31 is disposed inside the elastic member 51 in the accommodating portion 11 of the transmission case 10, that is, between the first inclined portion 53 and the second inclined portion 54 of the elastic member 51. Thus, the connecting member 31 and the outer periphery of the control rod 30 are fitted together. As shown in FIG. 3, the elastic member 51 is arranged such that the flat plate portion 52 and the protruding portion 31 c of the connecting member 31 are at different positions in the circumferential direction of the control rod 30.

  As shown in FIGS. 1 and 2, the elastic member 51 also connects the connecting member 31 in the axial direction of the control rod 30 and the accommodating portion 11 of the transmission case 11 when the change lever 20 is in the neutral position in the shift direction. The length of the first inclined portion 53 in the axial direction of the control rod 30 is formed to be smaller than the separation distance from the side surface portion 11b on the front side of the vehicle body, and the connecting member 31 and the transmission case 11 in the axial direction of the control rod 30 are formed. The length of the second inclined portion 54 in the axial direction of the control rod 30 is formed to be smaller than the distance from the side surface portion 11 c on the vehicle body rear side that constitutes the housing portion 11.

  In the manual transmission 1 configured as described above, when the change lever 20 is moved in the shift direction, the first inclined portion 53 or the second inclined portion 54 of the elastic member 51 has the connecting member 31 side on the connecting member 31 side. Is moved in the axial direction as the control rod 30 moves in the axial direction, and the side surface portion 11b or 11c side of the accommodating portion 11 contacts the side surface portion 11b or 11c, and then the flat plate portion 52 It is elastically deformed so that the angle θ becomes small, and a shift operation is performed.

  FIG. 5 is an explanatory diagram for explaining a state in which a shift operation is performed in the manual transmission. As shown in FIG. 5, when the change lever 20 is moved in the shift direction from the neutral position and the control rod 30 is moved to one side in the axial direction, the connecting member 31 side of the first inclined portion 53 of the elastic member 51 is connected to the connecting rod 31. The elastic member 51 is moved in the axial direction as the control rod 30 abuts against the member 31 and moves in the axial direction. After the synchronization, the sleeve of the synchronous meshing device meshes with the loose fitting gear. After the side surface portion 11b side of the first inclined portion 53 contacts the side surface portion 11b, the first inclined portion 53 of the elastic member 51 shifts while elastically deforming so that the angle θ with the flat plate portion 52 becomes small. The control rod 30 is biased in the direction opposite to the moving direction of the control rod 30 by being operated.

  When the change lever 20 is moved in the shift direction from the neutral position and the control rod 30 is moved to the other side in the axial direction, the connecting member 31 side of the second inclined portion 54 of the elastic member 51 is connected to the connecting member 31. The elastic member 51 is moved in the axial direction along with the axial movement of the control rod 30, and after the synchronization, the sleeve of the synchronous meshing device meshes with the loose fitting gear. After the side surface portion 11c side of the inclined portion 54 comes into contact with the side surface portion 11c, the second inclined portion 54 of the elastic member 51 is shifted while elastically deforming so that the angle with the flat plate portion 52 becomes small, and the control is performed. The control rod 30 is biased in the direction opposite to the moving direction of the rod 30.

  In the present embodiment, a plate spring is used as the biasing mechanism 50 that biases the control rod 30 in the direction opposite to the moving direction of the control rod 30 when the control rod 30 moves in the axial direction when the change lever 20 is shifted. The elastic member 50 is used, but when the control rod 30 moves in the axial direction during the shift operation of the change lever 20, it is elastically deformed in the axial direction of the control rod 30, so that it is opposite to the moving direction of the control rod 30. It is also possible to use an elastic member such as a coil spring or a disc spring as long as it is an elastic member that urges the control rod 30.

  As described above, in the manual transmission 1 according to this embodiment, when the control rod 30 moves in the axial direction in the transmission case 10 when the change lever 20 is shifted, the control rod 30 moves in the opposite direction. A biasing mechanism 50 that biases the control rod 30 is provided.

  The urging mechanism 50 controls the control rod 30 when the sleeve of the synchronous meshing device is moved in the axial direction by the shift operation of the change lever 20 and when the sleeve and the loosely coupled gear are meshed during or after synchronization. When the sleeve is engaged with the loose fitting gear without being urged, it contacts a stopper that regulates the stroke of the sleeve, for example, a stopper formed between the sleeve and the loose fitting gear. In addition, the control rod 30 is urged until the sleeve abuts against the stopper so as to prevent an operating force (shift load) required for the shift operation from increasing suddenly.

  As a result, the shift operation is performed against the urging force in the direction opposite to the moving direction of the control rod 30, so that the operation force required for the shift operation is shifted by the stopper after the synchronization by the synchronous meshing device. It is possible to suppress a sudden increase in the operating force (shift load) required for the operation. Further, during the synchronization or after the synchronization, the biasing mechanism 50 does not bias the control rod 30 when the sleeve and the loose fitting gear are engaged, so that the engagement between the sleeve and the loose fitting gear is achieved. Sometimes, adverse effects can be suppressed, and a good shift feeling can be obtained.

  The biasing mechanism 50 includes an elastic member 51 that biases the control rod 30 in a direction opposite to the moving direction of the control rod 30 by elastically deforming in the axial direction of the control rod 30. The control rod 30 can be biased in the direction opposite to the moving direction of the control rod 30 by the elastic deformation of 51, and the above-described effect can be effectively obtained with a relatively simple configuration.

  The transmission case 10 is formed with a housing portion 11 for housing the engaging portion 25 between the change lever 20 and the control rod 30, and the elastic member 51 is fitted in the outer periphery of the control rod 30 in the state of being housed. Since the elastic member 51 can be fitted to the outer periphery of the control rod 30 and disposed in the accommodating portion 11 by being arranged in the portion 11, a space for arranging the elastic member 51 is provided in the transmission case 10. The elastic member 51 can be easily assembled without having to be provided separately.

  Further, the elastic member 51 moves in the direction opposite to the moving direction of the control rod 30 when the control rod 30 is moved from the neutral position to either one side or the other side in the axial direction when the change lever 20 is shifted. By providing the control rod 30 to be biased, it is possible to suppress variation in shift feeling during a shift operation in which the control rod 30 is moved to one axial side and the other axial side.

  FIG. 6 is a cross-sectional view showing a part of the manual transmission according to the second embodiment of the present invention. FIG. 6A shows a state where the change lever 20 is in the neutral position, and FIG. Shows a state in which the change lever 20 is shifted. The manual transmission 61 according to the second embodiment is the same as the manual transmission 1 according to the first embodiment except that the urging mechanism for urging the control rod 30 is different from the manual transmission 1 according to the first embodiment. The same reference numerals are given to the configuration, and the description is omitted.

  Also in the manual transmission 61 according to the second embodiment of the present invention, as shown in FIG. 6, the change lever 20 is manually operated by the driver, and is engaged with the change lever 20. The control rod 30 that moves in the axial direction and rotates in the circumferential direction when the change lever 20 is selected is selectively connected by the circumferential rotation of the control rod 30 when the change lever 20 is selected. A plurality of shift rods 40 that move in the axial direction as the control rod 30 moves in the axial direction during operation are provided.

  In the automatic transmission 61, as shown in FIG. 6A, the movement direction of the control rod 30 when the control rod 30 moves in the axial direction in the transmission case 10 when the change lever 20 is shifted. An urging mechanism 70 for urging the control rod 30 in the opposite direction is provided.

  When the sleeve of the synchronous meshing device is moved in the axial direction by a shift operation of the change lever 20, the biasing mechanism 70 regulates the stroke of the sleeve after the sleeve meshes with the loose fitting gear after synchronization. The control rod 30 is configured to be biased in the direction opposite to the moving direction of the control rod 30 until it comes into contact with the stopper.

  Specifically, the urging mechanism 70 is inserted into the rod side recess 35 formed on the outer peripheral surface of the control rod 30 and the control rod insertion hole 14 through which the control rod 30 formed in the transmission case 10 is inserted. The case side recess 16 is provided, a coil spring 17 inserted into the case side recess 16, and a ball 18 supported at the tip of the coil spring 17.

  The rod-side concave portion 35 has a bottom surface portion 35a extending in parallel to the axial direction of the control rod 30, and directions orthogonal to the bottom surface portion 35a from the end portions on one side and the other side in the axial direction of the control rod 30 in the bottom surface portion 35a. The first side surface portion 35b and the second side surface portion 35c are inclined at a predetermined angle and extend outward, so that the ball 18 comes into contact with the substantially central portion of the bottom surface portion 35a at the neutral position in the shift direction of the change lever 20. Is provided.

  In the manual transmission 61 configured as described above, when the change lever 20 is moved in the shift direction, the control rod 30 is in contact with the ball 18 with the ball 18 in contact with the bottom surface portion 35a of the rod side recess 35. When the ball 18 moves relatively in the axial direction and contacts the first side surface portion 35b or the second side surface portion 35c of the rod side recess 35, the first side surface portion 35b or the first side surface portion 35b is moved along with the axial movement of the control rod 30. The ball 18 is pressed by the two side surfaces 35c to compress the coil spring 17, and the shift operation is performed.

  As shown in FIG. 6B, when the change lever 20 is moved in the shift direction from the neutral position and the control rod 30 is moved to one side in the axial direction, the ball 18 contacts the bottom surface portion 35a of the rod side recess 35. In this state, the control rod 30 is moved in the axial direction, and after synchronization, the sleeve of the synchronous meshing device meshes with the loose fitting gear, and then the ball 18 comes into contact with the second side surface portion 35c of the rod side concave portion 35. The ball 18 is pressed by the second side surface portion 35c and is shifted while compressing the coil spring 17, and the control rod 30 is biased in the direction opposite to the moving direction of the control rod 30.

  Further, when the change lever 20 is moved in the shift direction from the neutral position and the control rod 30 is moved to the other side in the axial direction, the control rod 30 is in a state where the ball 18 is in contact with the bottom surface portion 35 a of the rod side recess 35. Is moved in the axial direction, and after synchronization, the sleeve of the synchronous meshing device meshes with the loose fitting gear, and then the ball 18 comes into contact with the first side surface portion 35b of the rod-side recess 35, and then the ball 18 The shift operation is performed while the coil spring 17 is compressed by being pressed by the side surface portion 35b, and the control rod 30 is biased in the direction opposite to the moving direction of the control rod 30.

  As described above, also in the manual transmission 61 according to the present embodiment, when the control rod 30 moves in the axial direction during the shift operation of the change lever 20 in the transmission case 10, the direction opposite to the moving direction of the control rod 30. An urging mechanism 70 for urging the control rod 30 is provided.

  The urging mechanism 70 controls the control rod 30 when the sleeve of the synchronous meshing device is moved in the axial direction by the shift operation of the change lever 20 and when the sleeve and the loosely coupled gear are meshed during or after synchronization. When the sleeve is engaged with the loose fitting gear without being urged, it contacts a stopper that regulates the stroke of the sleeve, for example, a stopper formed between the sleeve and the loose fitting gear. In addition, the control rod 30 is urged until the sleeve abuts against the stopper so as to prevent an operating force (shift load) required for the shift operation from increasing suddenly.

  As a result, the shift operation is performed against the urging force in the direction opposite to the moving direction of the control rod 30, so that the operation force required for the shift operation is shifted by the stopper after the synchronization by the synchronous meshing device. It is possible to suppress a sudden increase in the operating force (shift load) required for the operation. Further, during or after the synchronization, the biasing mechanism 70 does not bias the control rod 30 when the sleeve and the loose fitting gear are engaged, and during the synchronization or the engagement between the sleeve and the loose fitting gear. Sometimes, adverse effects can be suppressed, and a good shift feeling can be obtained.

  In the present embodiment, the vertical manual transmissions 1 and 61 mounted on a vehicle such as a front engine and a rear drive vehicle in which the input shaft and the output shaft are arranged on the same axis line are described. The present invention can be similarly applied to other manual transmissions that include a control rod that moves in the axial direction when the change lever is shifted.

  The present invention is not limited to the illustrated embodiments, and various improvements and design changes can be made without departing from the scope of the present invention.

  As described above, according to the present invention, it is possible to suppress the operation force necessary for the shift operation from rapidly increasing after the synchronization by the synchromesh device, and it is possible to obtain a good shift feeling. Therefore, there is a possibility of being suitably used in the field of the manufacturing industry of this type of manual transmission.

DESCRIPTION OF SYMBOLS 1,61 Manual transmission 10 Transmission case 11 Housing | casing part 15 Control case 20 Change lever 25 Engagement part 30 Control rod 40 Shift rod 45 Gate mechanism 50, 70 Energizing mechanism 51 Elastic member

Claims (5)

A change lever that is manually operated by a driver, a control rod that is engaged with the change lever, moves in the axial direction when the change lever is operated, and rotates circumferentially when the change lever is selected ; The sleeve is slid in conjunction with the shift operation of the change lever to synchronize and connect the loose fitting gear and the shaft to which the loose fitting gear is loosely fitted so that a predetermined shift stage is in a power transmission state. A manual transmission equipped with a synchronous meshing device of
A biasing mechanism that biases the control rod in a direction opposite to the axial movement direction of the control rod by the shift operation when the control rod moves in the axial direction when the change lever is shifted in the transmission case. equipped with a,
In the biasing mechanism, a biasing force acts on the control rod between the time when the sleeve is engaged with the loose fitting gear and the time when the sleeve comes into contact with a stopper that regulates the stroke of the sleeve after the synchronization by the synchronous meshing device. Configured as
A manual transmission characterized by that. The biasing mechanism is elastically deformed in the axial direction of the control rod when the control rod moves in the axial direction during the shift operation of the change lever, and is opposite to the axial movement direction of the control rod by the shift operation. An elastic member for urging the control rod in the direction;
The manual transmission according to claim 1. The elastic member moves the control rod in a direction opposite to the moving direction of the control rod, even when the control rod is moved from the neutral position to either the one side or the other side in the axial direction when the change lever is shifted. Provided to bias the rod,
The manual transmission according to claim 2 . The elastic member is formed by a leaf spring,
The manual transmission according to claim 2 or claim 3 , wherein A change lever that is manually operated by a driver, and a control rod that is engaged with the change lever and moves in the axial direction when the change lever is shifted and rotates in the circumferential direction when the change lever is selected. Manual transmission,
A biasing mechanism that biases the control rod in a direction opposite to the axial movement direction of the control rod by the shift operation when the control rod moves in the axial direction when the change lever is shifted in the transmission case. With
The biasing mechanism is elastically deformed in the axial direction of the control rod when the control rod moves in the axial direction during the shift operation of the change lever, and is opposite to the axial movement direction of the control rod by the shift operation. An elastic member for urging the control rod in the direction;
In the transmission case, an accommodating portion for accommodating an engaging portion between the change lever and the control rod is formed,
The elastic member is disposed in the housing portion in a state fitted to the outer periphery of the control rod.
A manual transmission characterized by that.

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