JP6542598B2 - Transmission parking structure and transmission - Google Patents

Description

  The present invention relates to a parking structure and transmission for a transmission that establishes a parking state by regulating the rotation of a rotating shaft rotatably supported by a case member.

  JP-A-2010-47037 (Patent Document 1) discloses a first parking gear fixed to the output shaft so as to be integrally rotatable with the output shaft of the transmission, and the first parking gear. A second parking gear rotatably supported with respect to the output shaft in a spaced state, and a connecting member resiliently connecting the first and second parking gears in the rotational direction; And a parking pole having an engagement portion engageable with the teeth of the second parking gear.

  In the parking structure of the transmission, when the rotation of the output shaft is stopped, that is, when the vehicle is at a standstill, the elastic force of the connecting member aligns both the teeth of the first and second parking gears As a result, engagement between the engagement portion of the parking pawl and both the teeth is enabled to establish the parking state. On the other hand, when the output shaft is accelerating or decelerating, that is, when the vehicle is accelerating or decelerating, the first and second parking gears rotate relative to each other against the elastic force of the connecting member and both teeth are rotated. Since the phases of the parts shift, it is possible to prevent the engagement between the engaging part of the parking pole and both the tooth parts, thereby avoiding the establishment of an unintended parking state at the time of vehicle acceleration / deceleration traveling. .

JP, 2010-47037, A

  However, in the above-described transmission parking structure, when the output shaft is rotating at a constant speed, that is, when the vehicle is traveling at a constant speed, the first and second parking gears cause relative rotation. Since the external force does not act, the elastic force of the connecting member may cause the teeth of both the first and second parking gears to be aligned, and the teeth of both the engaging portion of the parking pole and the first and second parking gears There is still room for improvement in that it can engage with the part and reliably prevent unintended parking conditions.

  The present invention has been made in view of the above, and it is an object of the present invention to provide a parking structure for a transmission and a transmission capable of reliably preventing an unintended parking state.

  The parking structure and transmission of the transmission of the present invention employ the following means in order to achieve the above-mentioned object.

  According to a preferred embodiment of the parking structure of the transmission according to the present invention, the parking structure of the transmission is established which regulates the parking state by restricting the rotation of the rotating shaft rotatably supported by the case member. The parking structure of the transmission includes a parking gear, a parking pole, and a parking restricting member. The parking gear is fixed to the rotating shaft so as to be immersed in the lubricating oil stored at least in part in the case member. The parking pole has an engaging portion that engages with the parking gear, and swings between an engagement position where the engaging portion engages with the parking gear and a retracted position where the engaging portion retracts from the parking gear It is supported by the case member as possible. The parking regulating member is configured to be actuated by the lubricating oil that scrapes the parking gear when the rotation shaft rotates, and prevents the engagement between the engaging portion and the parking gear.

  The "transmission" in the present invention is defined as a device that changes the rotation speed of the output shaft of the power source and transmits it to the drive shaft, and in addition to the stepped transmission that changes the rotation speed in stages, the rotation A continuously variable transmission which changes the number continuously, a reduction gear which only decelerates the rotation speed, or a speed increaser which only accelerates the rotation speed is preferably included.

  According to the present invention, while the rotating shaft is rotating, that is, not only when the vehicle is accelerating / decelerating traveling, but also when the vehicle is traveling at a constant speed, the engaging portion of the parking pole and the parking are engaged Since engagement with the gear can be prevented, an unintended parking state can be reliably prevented. Naturally, when the rotating shaft is not rotating, that is, when the vehicle is at a standstill, the parking gear does not scrape the lubricating oil and the parking regulating member does not operate. Can be engaged, and parking can be established.

  According to the further aspect of the parking structure of the transmission according to the present invention, the parking regulation member is a pressure receiving portion configured to be capable of receiving the oil pressure by the lubricating oil scraped by the parking gear, and the oil pressure acting on the pressure receiving portion And a prevention portion configured to be interposed between the engagement portion and the parking gear and configured to prevent the engagement between the engagement portion and the parking gear.

  According to this aspect, it is possible to prevent the engagement between the engaging portion of the parking pole and the parking gear while the rotating shaft is rotating with a simple configuration.

  According to the further form of the parking structure of the transmission which concerns on this invention, the parking control member is rotatably supported by the rotating shaft. Further, the preventing portion is configured to cover at least a part of the outer peripheral surface of the parking gear. The parking restricting member rotates on the rotation shaft due to the hydraulic pressure acting on the pressure receiving portion, and the preventing portion is configured to be interposed between the engaging portion and the parking gear.

  According to the present embodiment, the parking restriction member is rotated on the rotation shaft to interpose the preventing portion between the engagement portion and the parking gear, so that the parking pole is rotated while the rotation shaft is rotating. The structure for preventing the engagement between the engagement portion and the parking gear can be realized with a space saving.

  According to the further form of the parking structure of the transmission which concerns on this invention, the prevention part has a notch part. And when rotation of a rotating shaft stops, a notch part is located between an engaging part and parking gear, and it is constituted so that engagement with an engaging part and parking gear is permitted.

  According to the present embodiment, since the configuration is merely provided with the notch portion in the prevention portion, the structure for permitting the engagement between the engagement portion and the parking gear when the rotation of the rotation shaft is stopped can be easily secured. it can.

  According to a further aspect of the parking structure of the transmission according to the present invention, when the rotation of the rotation shaft is stopped, the parking restriction member is positioned such that the notch is between the engagement portion and the parking gear by its own weight. It is configured.

  According to this aspect, it is possible to more simply secure the structure that allows the engagement between the engagement portion and the parking gear when the rotation of the rotation shaft is stopped.

  According to a further aspect of the parking structure of the transmission according to the present invention, the prevention portion is a second cutout portion which is cut out larger than the cutout portion on the side opposite to the cutout portion across the center of the parking restriction member. have.

  According to the present embodiment, the center of gravity of the parking restriction member can be set closer to the notch with a simple configuration in which only the second notch is provided. Moreover, weight reduction of a parking control member can be achieved by the part | minute which provided the 2nd notch part. Furthermore, since the lubricating oil scraped up by the parking gear can be discharged from the second cutout, rotation friction of the parking gear can be reduced as compared with the configuration without the second cutout.

  According to the further aspect of the parking structure of the transmission according to the present invention, the elastic force applying member applies elastic force to the parking gear regulating member so as to maintain the state of permitting the engagement between the engaging portion and the parking gear. Are further equipped. The parking regulating member allows the engagement between the engaging portion and the parking gear by the elastic force when the rotation of the rotary shaft is stopped, and the hydraulic pressure acting on the pressure receiving portion when the rotary shaft is rotated. Thus, the preventing portion is interposed between the engaging portion and the parking gear against the elastic force to prevent the engagement between the engaging portion and the parking gear.

  According to this aspect, when the rotation of the rotation shaft of the parking pole is stopped, the preventing portion interposed between the engaging portion of the parking pole and the parking gear due to the hydraulic pressure acting on the pressure receiving portion. By retracting from between the engaging portion and the parking gear, the engaging portion of the parking pole and the parking gear can be reliably returned to the state where they can be engaged.

  According to a preferred embodiment of the transmission according to the present invention, the case member, the rotating shaft, the parking gear, the parking pole, and the parking regulating member are provided. The case member is configured to be able to store lubricating oil at the bottom. The rotating shaft is rotatably supported by the case member. The parking gear is fixed to the rotating shaft so that at least a portion thereof is immersed in the lubricating oil. The parking pole has an engagement portion that engages with the parking gear, and between an engagement position where the engagement portion engages with the parking gear and a retracted position where the engagement portion retracts from the parking gear It is supported by the case member so that it can swing. The parking regulation member is configured to be actuated by the lubricating oil that scrapes the parking gear when the rotation shaft rotates, and prevents the engagement between the engagement portion and the parking gear. And the said transmission is comprised so that a parking state may be established by restricting rotation of a rotating shaft using the parking structure of the transmission which concerns on this invention of one of the aspects mentioned above.

  According to the present invention, the parking state is established by restricting the rotation of the rotating shaft using the parking structure for the transmission according to the present invention according to any one of the aspects described above. The same effect as the effect of the parking structure can be exhibited, for example, an effect of reliably preventing an unintended parking state.

  According to the present invention, it is possible to provide a transmission parking structure and transmission that can reliably prevent an unintended parking state.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the outline of a structure of the reduction gear 1 which concerns on embodiment of this invention. It is sectional drawing which shows the AA cross section of FIG. It is an enlarged view which expands and shows the D section of FIG. FIG. 6 is a perspective view showing an appearance of a parking regulation member 26. FIG. 5 is a front view of the parking restriction member 26 as viewed from the left side of FIG. 4; FIG. 6 is a side view of the parking restriction member 26 as viewed from the right side of FIG. 5; FIG. 5 is a bottom view of the parking restriction member 26 as viewed from the lower side of FIG. 4. FIG. 2 is a configuration view showing an outline of a configuration of a case member 10; It is an explanatory view showing a parking state. It is an explanatory view showing the state where parking was restricted. It is explanatory drawing which shows the parking state in the reduction gear 100 of a modification. It is an explanatory view showing the state where it was restricted in reduction gear 100 of a modification. It is explanatory drawing which shows the parking state in the reduction gear 200 of a modification. It is explanatory drawing which shows the state by which the reduction gear 200 of the modification was controlled.

  Next, the best mode for carrying out the present invention will be described using examples.

  As shown in FIG. 1, the reduction gear 1 according to the present embodiment includes an input shaft 2, an output shaft 4 connected to the input shaft 2 via a reduction gear train RGM, the output shaft 4 and an output gear. A differential device 6 connected via a row OGM, a parking mechanism 20 for restricting the rotation of the input shaft 2, and a case member 8 configured to receive them are provided. The reduction gear 1 corresponds to the "transmission" in the present invention, and the input shaft 2 is an example of the implementation corresponding to the "rotational shaft" in the present invention.

  As shown in FIG. 1, the input shaft 2 and the output shaft 4 are rotatably supported by the case member 8 via a bearing B. The input shaft 2 is directly or indirectly connected to an output shaft (not shown) of a power source 90 such as an electric motor or an internal combustion engine via a clutch or a torque converter.

  As shown in FIG. 1, the reduction gear train RGM includes a drive gear G integrally formed on the input shaft 2 and a driven gear G ′ fixed to the output shaft 4 so as to mesh with the drive gear G. It is configured. The driven gear G ′ has a larger number of teeth and a larger diameter than the driving gear G, and decelerates the rotational speed of the input shaft 2 and transmits it to the output shaft 4.

  As shown in FIG. 1, the output gear train OGM is composed of an output gear OG integrally formed on the output shaft 4 and a ring gear RG fixed to the differential device 6 so as to mesh with the output gear OG. There is.

  As shown in FIGS. 2 and 3, the parking mechanism 20 rotates on the parking gear 22 integrally formed on the input shaft 2, the parking pole 24 supported on the case member 8 via the pin P, and the input shaft 2. It is comprised from the parking control member 26 supported freely.

  The parking gear 22 is, as shown in FIG. 2, partially immersed in the lubricating oil stored in the case member 8. As shown in FIG. 2, the parking pole 24 is formed in an elongated shape and has an engaging portion 24a engageable with the parking gear 22 at one end in the longitudinal direction, and is substantially in the longitudinal direction. An insertion hole 24 b for inserting the pin P is provided at the central portion.

  Further, the parking pole 24 is biased in a direction in which the engaging portion 24a is separated from the parking gear by the torsion spring TSPR. The parking pole 24 can pivot between an engagement position where the engagement portion 24 a engages with the parking gear 22 and a retracted position where the engagement portion 24 a retracts from the parking gear 22 with the pin P as a fulcrum. It is supported by the case member 8 as follows.

  As shown in FIGS. 4 to 7, the parking restriction member 26 is formed in a substantially hat shape including a large diameter cylindrical portion 32 and a small diameter cylindrical portion 34. As shown in FIG. 4, the large-diameter cylindrical portion 32 has a peripheral wall surface 32a and a bottom wall surface 32b, and is configured to be cut away at two places in the circumferential direction.

  The inner diameter of the peripheral wall surface 32a is formed to be slightly larger than the outer diameter of the parking gear 22 as shown in FIG. 2, and the height of the peripheral wall surface 32a (axial length, left-right length in FIG. 3) Is formed to be slightly larger than the thickness (the length in the left-right direction of FIG. 3) of the parking gear 22 as shown in FIG. Thus, when the parking restriction member 26 is supported by the input shaft 2, the parking gear 22 is accommodated in the peripheral wall surface 32 a of the large diameter cylindrical portion 32.

  The two notches in the circumferential direction of the large diameter cylindrical portion 32 are, as shown in FIG. 4 and FIG. 5, a small notch 42 and an important notch 44 notched larger than the small notch 42. , Is composed of. As shown in FIG. 5, the small notch portion 42 is formed in a substantially fan shape by cutting a predetermined amount from the peripheral wall surface 32 a toward the center of the small diameter cylindrical portion 34.

  Thereby, as shown in FIG. 4 and FIG. 5, the two opposing end surfaces 42a which mutually oppose are comprised by the surrounding wall surface 32a and the bottom wall surface 32b. The circumferential length of the small notch portion 42 corresponds to, for example, two adjacent teeth of the parking gear 22 so that the engaging portion 24a of the parking pole 24 can pass with time. Is formed.

  As shown in FIG. 5, the important notch 44 is opposite to the small notch 42 across the center of the inner hole 34 a of the small diameter cylindrical portion 34 described later, that is, at a position facing the small notch 42, It is formed by cutting a large diameter cylindrical portion 32 linearly in a chord.

  The inner hole 34 a of the small diameter cylindrical portion 34 is formed to have a diameter equal to or slightly larger than the outer diameter of the input shaft 2. The inner hole 34 a of the small diameter cylindrical portion 34 penetrates to the bottom wall surface 32 b of the large diameter cylindrical portion 32 as shown in FIGS. 4 to 7. By inserting the input shaft 2 into the inner hole 34 a of the small diameter cylindrical portion 34, the parking restriction member 26 is rotatably supported by the input shaft 2. Preferably, a bearing such as a bearing or a bush is interposed between the inner hole 34 a of the small diameter cylindrical portion 34 and the input shaft 2.

  Further, as shown in FIGS. 5 and 6, the outer peripheral surface of the small diameter cylindrical portion 34 is provided with a projection 34b that protrudes outward in the radial direction. As shown in FIG. 5, the projection 34 b is at the same position as the circumferential position where the small cutout portion 42 of the large diameter cylindrical portion 32 is formed among the circumferential positions of the outer peripheral surface of the small diameter cylindrical portion 34, It is formed in the position equivalent to the approximate center of the circumferential direction width of the small notch part 42 concerned.

  The parking regulation member 26 configured in this way has the important notch 44 on the opposite side of the small notch 42 across the center of the inner hole 34a of the small diameter cylindrical portion 34, and the small diameter cylindrical portion Among the circumferential positions of the outer peripheral surface of 34, the same position as the circumferential position where the small notch 42 of the large diameter cylindrical portion 32 is formed, and a position corresponding to substantially the center of the circumferential width of the small notch 42 The protrusion 34 b is formed to have a center of gravity at a position offset to a position closer to the small notch portion 42 than the center of the inner hole 34 a of the small diameter cylindrical portion 34.

  As shown in FIG. 8, in the case member 8, mounting holes 8a and 8b, a boss 8c, a stopper 8d and the like are formed. The mounting hole 8 a is a hole for mounting a bearing B that supports the input shaft 2. The mounting hole 8 b is a hole for mounting a bearing B that supports the output shaft 4. The boss portion 8 c is a portion for attaching a pin P for supporting the parking pole 24. The stopper 8 d is a portion that restricts the rotation of the parking restriction member 26.

  The stopper 8d is a part of the small-diameter cylindrical portion 34 of the parking restriction member 26 when the parking restriction member 26 rotates a predetermined rotation angle counterclockwise from the state where the small notch 42 points vertically downward on the input shaft 2. The protrusion 34 b is provided at a position where it can abut. Here, the predetermined rotation angle is a state in which the parking restriction member 26 aligns the engagement portion 24 a of the parking pole 24 and the small cutout portion 42 of the parking restriction member 26, that is, the engagement portion 24 a has the small cutout portion 42. From the passable state, the engagement portion 24a of the parking pole 24 and the peripheral wall surface 32a of the parking restriction member 26 are aligned, that is, the engagement portion 24a is separated from the parking gear 22 by the peripheral wall surface 32a. It is set to an angle that can rotate up to.

  Next, the operation of the speed reducer 1 thus configured will be described. First, a state when the parking restriction member 26 permits the parking state will be described, and then, a state when the parking restriction member 26 restricts the parking state will be described.

  When the vehicle on which the reduction gear 1 is mounted is stopped, that is, when the reduction gear 1 is not operating and the input shaft 2 or the output shaft 4 is not rotating, the parking restriction member 26 is shown in FIG. As shown, it stops in the state where the small notch part 42 was located below the perpendicular direction by dead weight. As described above, when the vehicle on which the reduction gear 1 is mounted is stopped, the parking restriction member 26 positions the small notch 42 vertically downward by its own weight and stops the parking restriction member 26 in the inner hole 34a. The center of gravity is located at a position offset toward the small notch 42 than the center of the circle.

  As a result, the engaging portion 24a of the parking pole 24 and the small notch portion 42 of the parking restriction member 26 are aligned, and the engaging portion 24a can pass through the small notch portion 42. 24a and the parking gear 22 can be engaged, and the parking state is permitted. The small notch 42 is an example of the implementation corresponding to the "notch" in the present invention.

  On the other hand, when the vehicle equipped with the reduction gear is traveling, that is, when the reduction gear 1 is operating and the input shaft 2 and the output shaft 4 are rotating, as shown in FIG. The lubricating oil stored in the case member 8 is scraped up by the parking gear 22 which rotates with rotation (counterclockwise in FIG. 2), and the parking regulating member 26 is rotated by the lubricating oil scraped up by the parking gear 22. (Counterclockwise in FIG. 10).

  Specifically, the lubricating oil scraped up by the parking gear 22 flows in between the parking gear 22 and the peripheral wall surface 32 a of the large diameter cylindrical portion 32, and the viscosity of the parking restriction member 26 becomes the parking gear 22 due to its viscosity. It is taken in the same direction.

  Further, a part of the lubricating oil scraped up by the parking gear 22 is located on the front side of the parking restriction member 26 in the rotation direction of the large diameter cylindrical part 32 of the parking restriction member 26 (see FIG. 10). In order to collide with the opposite end surface 42a) on the right side of the vehicle, the rotation of the parking restriction member 26 in the same direction as the parking gear 22 is promoted. Here, the opposing end surface 42a is an example of the implementation configuration corresponding to the "pressure receiving portion" in the present invention.

  Thus, as the parking regulation member 26 is rotated, the peripheral wall surface 32a of the parking regulation member 26 is interposed between the engagement portion 24a of the parking pole 24 and the parking gear 22, as shown in FIG. That is, the engaging portion 24a and the parking gear 22 are separated by the peripheral wall surface 32a, and the engagement between the engaging portion 24a and the parking gear 22 is blocked. As a result, the parking state is restricted. Here, the peripheral wall surface 32a is an example of the implementation configuration corresponding to the "prevention portion" in the present invention.

  The rotation of the parking regulation member 26 is regulated by the projection 34 b provided on the small diameter cylindrical portion 34 abutting on the stopper 8 d provided on the case member 8. Thereby, when the vehicle mounted with the reduction gear 1 is traveling, the engagement between the engagement portion 24a and the parking gear 22 can be reliably prevented, and the parking state can be reliably prevented. .

  Further, since the lubricating oil which is scraped up by the parking gear 22 and flows into the space between the parking gear 22 and the peripheral wall surface 32 a of the parking regulating member 26 is discharged from the important missing portion 44, the configuration without the important missing portion 44 The rotational friction of the parking gear 22 can be reduced compared to the case of FIG. The important part 44 is an example of the implementation corresponding to the "second notch" in the present invention.

  According to the reduction gear 1 of the present embodiment described above, the parking restriction member 26 is rotated by the lubricating oil scraped up by the parking gear 22, so that the parking state is restricted. Not only while the reduction gear 1 is operating and the input shaft 2 and the output shaft 4 are rotating, ie, while the vehicle equipped with the reduction gear 1 is accelerating / decelerating, the vehicle travels at a constant speed. Even in the case where the parking gear 24 is engaged, the engagement between the engaging portion 24 a of the parking pole 24 and the parking gear 22 can be prevented. Thereby, an unintended parking state can be reliably prevented. Naturally, when the input shaft 2 or the output shaft 4 is not rotating, that is, when the vehicle equipped with the reduction gear 1 is at a stop, the engagement between the engaging portion 24a of the parking pole 24 and the parking gear 22 is Permitted, parking conditions can be established.

  In the present embodiment, when the vehicle mounted with the reduction gear 1 is stopped, the parking restriction member 26 is configured such that the small cutout portion 42 of the large diameter cylindrical portion 32 is positioned vertically downward due to its own weight. However, it is not limited to this.

  For example, as shown in the reduction gear 100 of the modification illustrated in FIGS. 11 and 12, when the vehicle to which the reduction gear 100 is to be mounted is stopped, the parking restriction member 26 is spring-forced to make the large diameter cylindrical portion 32 The small notch portion 42 may be configured to be located in the lower side in the vertical direction.

  In the reduction gear 100, as shown in FIG. 11, the spring stopper projection 8e provided on the case member 8 and the projection 34b provided on the small diameter cylindrical portion 34 of the parking restriction member 26 are connected by the spring member SPR. . The spring stopper projection 8e is provided on the rear side of the parking restriction member 26 in the rotational direction (counterclockwise in FIG. 11) with the projection 34b provided on the small diameter cylindrical portion 34 of the parking restriction member 26 interposed therebetween. The spring member SPR is an example of an implementation configuration corresponding to the "elastic force applying member" in the present invention.

  Thereby, when the vehicle on which the reduction gear 100 is mounted is stopped, as shown in FIG. 11, the parking restriction member 26 has the small notch portion 42 of the large diameter cylindrical portion 32 vertical due to the spring force of the spring member SPR. When the vehicle on which the reduction gear 100 is mounted is traveling, the engagement between the engaging portion 24a of the parking pole 24 and the parking gear 22 is permitted while being positioned downward as shown in FIG. As shown, the parking restriction member 26 is rotated against the spring force of the spring member SPR by the lubricating oil scraped up by the rotation of the parking gear 22, and the circumferential surface 32a of the large diameter cylindrical portion 32 The engagement between the engagement portion 24 a and the parking gear 22 is restricted.

  Although the parking restriction member 26 is rotated by the lubricating oil scraped by the parking gear 22 in the present embodiment and the modification described above, the restriction of the parking state and the release of the restriction are performed, but the present invention is limited thereto. Absent.

  For example, as exemplified in the reduction gear 200 of the modified example of FIGS. 13 and 14, the parking restriction member 226 is linearly moved by the lubricating oil scraped up by the parking gear 22, thereby restricting the parking state and releasing the restriction. It may be a configuration to be performed.

  The parking restriction member 226 is formed in a substantially L-shaped cross section including a long main body portion 226a and a bent portion 226b connected to the main body portion 226a at a right angle. An opening 242 is formed in the main body portion 226a. The parking restriction member 226 is slidably supported by a guide wall 8f provided on the case member 8, and the bending portion 226b and the guide wall 8f are connected by a spring member SPR.

  The main body portion 226a corresponds to the "prevention portion" in the present invention, the opening 242 corresponds to the "notch portion" in the present invention, and the bending portion 226b corresponds to the "pressure receiving portion" in the present invention. It is an example. The spring member SPR is an example of an implementation corresponding to the "elastic force applying member" in the present invention.

  Thus, when the vehicle on which the reduction gear 200 is mounted is stopped, as shown in FIG. 13, the parking restriction member 226 is engaged with the opening 242 of the main body portion 226a and the parking pole 24 by the spring force of the spring member SPR. When the vehicle on which the reduction gear 200 is mounted is traveling, the lubricating oil scraped up by the rotation of the parking gear 22 hits the bending portion 226b, as shown in FIG. By contacting, the parking regulation member 226 is linearly moved against the spring force of the spring member SPR, and the engagement between the engagement portion 24a of the parking pole 24 and the parking gear 22 is regulated by the main body portion 226a. Become.

  Although the parking structure in the reduction gear 1, 100, 200 is used in the present embodiment and the above-described modification, the present invention is not limited to this. For example, the present invention may be applied to a stepped transmission, a continuously variable transmission, and a step-up gear.

  In the present embodiment and the above-described modification, the parking gear 22 is integrally formed on the input shaft 2, but the present invention is not limited to this. For example, the parking gear 22 may be integrally formed on the output shaft 4.

  The present embodiment shows an example of a mode for carrying out the present invention. Therefore, the present invention is not limited to the configuration of the present embodiment.

1 Reducer (transmission)
2 Input axis (rotation axis)
4 Output shaft 6 Differential device 8 Case member (case member)
8a mounting hole 8b mounting hole 8c boss 8d stopper 8e spring stopper 8f guide wall 20 parking mechanism 22 parking gear (parking gear)
24 Parking pole (parking pole)
24a engagement part (engagement part)
24b insertion hole 26 parking regulation member (parking regulation member)
32 Large diameter cylindrical part 32a Peripheral wall surface (preventing part)
32b bottom wall surface 34 small diameter cylindrical portion 34a inner hole 34b protrusion 42 small notch (notch)
42a Opposite end face (pressure receiving part)
44 Important missing part (2nd notch part)
90 Power Source 100 Reducer (Transmission)
200 reduction gear (transmission)
226 Parking Regulation Member (Parking Regulation Member)
226a Body part (prevention part)
226b bending part (pressure receiving part)
242 Opening (notch)
RGM reduction gear train G drive gear G 'driven gear OGM output gear train OG output gear RG ring gear P pin TSPR torsion spring SPR spring member (elastic force applying member)

Claims (8)

A parking structure for a transmission that establishes a parking state by restricting rotation of a rotating shaft rotatably supported by a case member, comprising:
A parking gear fixed to the rotating shaft so as to be at least partially immersed in the lubricating oil stored in the case member;
It has an engaging portion which engages with the parking gear, and can be pivoted between an engaging position where the engaging portion engages with the parking gear and a retracted position where the engaging portion retracts from the parking gear Parking pole supported by the case member
A parking restricting member configured to be actuated by a lubricating oil that scrapes the parking gear when the rotating shaft rotates to prevent the engagement between the engaging portion and the parking gear;
Transmission parking structure comprising: The parking regulation member is a pressure receiving portion configured to be capable of receiving an oil pressure by lubricating oil scraped by the parking gear, and the engagement portion and the parking gear due to the oil pressure acting on the pressure receiving portion. The transmission parking structure according to claim 1, further comprising: a prevention portion interposed between the engagement portions and configured to prevent the engagement between the engagement portion and the parking gear. The parking regulation member is rotatably supported by the rotation shaft,
The prevention unit is configured to cover at least a part of an outer peripheral surface of the parking gear,
The parking restriction member rotates on the rotation shaft due to the hydraulic pressure acting on the pressure receiving portion, and the prevention portion is configured to be interposed between the engagement portion and the parking gear. The transmission parking structure according to claim 2. The preventing portion has a notch, and when the rotation of the rotating shaft is stopped, the notch is located between the engaging portion and the parking gear to cause the engaging portion and the parking gear to stop. The transmission parking structure according to claim 3, wherein the parking gear is allowed to engage with the parking gear. The transmission according to claim 4, wherein the parking regulation member is configured such that the notch portion is positioned between the engagement portion and the parking gear by its own weight when the rotation of the rotation shaft is stopped. Parking structure. The transmission according to claim 5, wherein the prevention portion has a second cutout portion which is cut out larger than the cutout portion on the opposite side to the cutout portion with respect to the center of the parking regulation member. Parking structure. The parking gear restricting member further includes an elastic force applying member that applies an elastic force to the parking gear restricting member so as to maintain the state of permitting the engagement between the engaging portion and the parking gear.
The parking restriction member allows the engagement between the engagement portion and the parking gear by the elastic force when the rotation of the rotation shaft is stopped, and the pressure is received when the rotation shaft is rotated. The hydraulic pressure acting on the portion is configured to interpose the preventing portion between the engaging portion and the parking gear against the elastic force to prevent the engagement between the engaging portion and the parking gear. The parking structure for a transmission according to any one of claims 2 to 4. A case member configured to be able to store lubricating oil at the bottom;
A rotating shaft rotatably supported by the case member;
A parking gear fixed to the rotating shaft so as to be at least partially immersed in the lubricating oil;
It has an engaging portion which engages with the parking gear, and can be pivoted between an engaging position where the engaging portion engages with the parking gear and a retracted position where the engaging portion retracts from the parking gear Parking pole supported by the case member
A parking restricting member configured to be actuated by a lubricating oil that scrapes the parking gear when the rotating shaft rotates to prevent the engagement between the engaging portion and the parking gear;
Equipped with
A transmission configured to establish a parking state by restricting the rotation of the rotary shaft by the parking structure of a transmission according to any one of claims 1 to 7.

Images