JP4344268B2 - Detent structure of automatic transmission for vehicles - Google Patents

Description

  The present invention relates to a detent structure of an automatic transmission for a vehicle, and more particularly to a structure for mounting a detent spring constituting the detent structure to an automatic transmission.

  2. Description of the Related Art Conventionally, for example, there is known a configuration in which an automatic transmission for a vehicle is provided with a detent structure that holds a range position selected by a control lever at the time of a driver's range position switching operation. The detent structure includes, for example, a manual plate that rotates in response to the switching operation of the range position of the control lever by the driver and has a plurality of cam grooves on the outer peripheral portion, and those that rotate with the manual plate. A configuration including a detent spring that elastically biases the engaging portion toward the manual plate so as to engage with the cam groove corresponding to the rotation position of the manual plate among the plurality of cam grooves. Yes (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 64-46570

However, in the conventional detent structure described above, the detent spring is configured to be fixed to the inner surface of the transmission case or the inside of the main body of the transmission case such as a control valve body housed in the transmission case. The following disadvantages (1) to (3) are considered to be inconvenient, leaving room for improvement.
(1) Since the detent spring is arranged inside the transmission case body in which the valve body and the like are accommodated, there is no space in the first place due to the demand for downsizing of the transmission case body. Regardless of the space required for the detent spring, the control valve circuit layout is limited.
(2) When the detent spring is fixed to the control valve body, the spring reaction force of the detent spring acts on the control valve body, so that the control valve unit is not easily assembled.
(3) Regardless of the case where the detent spring is fixed to either the inner surface of the transmission case or the control valve body, a process for performing surface processing of the seat surface for attaching the detent spring is required.

  Therefore, in order to advantageously solve the above-described problems, the present invention effectively uses the space inside the body of the transmission case, improves the assembling property of the parts accommodated in the transmission, the processing man-hours, and the assembling property of the detent spring. An object of the present invention is to provide a detent structure for an automatic transmission for a vehicle that is suitable from the viewpoint of improving the above.

For the above purpose, the detent structure of the automatic transmission for a vehicle according to the present invention is a manual plate having a plurality of cam grooves on the outer periphery and rotating according to the range position switching operation of the control lever by the driver, A detent that elastically biases the tip engaging portion toward the manual plate so as to engage with the cam groove corresponding to the rotational position of the manual plate among the plurality of cam grooves as the manual plate rotates. A vehicle having a spring and configured to maintain a range position selected by a range position switching operation of the control lever by engaging the cam groove of the manual plate and the engaging portion of the detent spring. in the detent structure of the automatic transmission, instrumentation on the body side surface of the transmission case of the automatic transmission On has been the main body side to form a combined surface flush for mounting the side cover that covers the opening of the main body side, the seating surface for the detent spring is formed, it said on the seating surface detent The base portion of the spring is seated and fixed, and the tip engaging portion is inserted into the main body.

In the detent structure of the automatic transmission according to the present invention described above, the manual plate has a plurality of cam grooves on its outer peripheral portion, and rotates according to the range position switching operation of the control lever by the driver. As the manual plate rotates, the detent spring elastically moves the tip engagement part toward the manual plate so that it engages with the cam groove corresponding to the rotation position of the manual plate. Energize. For this detent spring, the seating surface in an automatic transmission of the transmission mating surface of the side cover is mounted to be attached to the body side face to cover the opening of the body side surface of the case on the same plane is formed, the seating The base portion of the detent spring is seated and fixed on the surface, and the tip engaging portion of the detent spring is inserted into the main body of the transmission case.

According to the detent structure for an automatic transmission comprising the above configuration, the base of the detent spring, while being disposed on the body side surface of the transmission case, can be assembled from the mounting direction of the side cover by a fastening member such as bolts . Therefore, there is no need to provide a space for the detent spring inside the transmission case main body, so there is no restriction due to the arrangement of the detent spring in the layout or the like when configuring the control valve circuit. The internal space can be used effectively. Also, after assembling parts such as the transmission mechanism and control valve unit inside the transmission case main body, the base of the detent spring can be fixed to the main body of the transmission case by a fastening member such as a bolt. case body side surface, on the mating surfaces flush with the side cover is mounted, member disturbing the fixation of the detent spring is not installed. Therefore, the base of the detent spring can be easily fixed to the transmission case, and the assembling property of the detent spring can be improved. Further, even when the detent spring is replaced, the base of the detent spring can be easily attached and detached by removing the side cover from the main body of the transmission case.

In addition, the body-side surface of the transmission case, the base of the detent spring on the mating surface flush with the side cover is mounted seated and by fixing the tip engaging portion of the detent spring body of the transmission case According to the present configuration inserted into the control valve unit, it is possible to eliminate the above-described problem of deterioration in assembly of the control valve unit when the detent spring is fixed to the control valve body. The assembly of the unit can be improved.

Thereon, according to this configuration, the body-side surface of the transmission case, since the side cover is in the same plane and the seating surface of the mating surfaces and detent spring mounted, the transmission case body, the side cover At the same time machining of the seating surface for the detent spring mating surfaces of the processing and the can be performed. Therefore, it is not necessary to process only the seating surface of the detent spring when the detent spring is attached to the inside of the main body of the transmission case or the control valve body, and the number of steps can be reduced.

  Therefore, according to the detent structure of the automatic transmission for a vehicle of the present invention configured as described above, the problems (1) to (3) pointed out as inconvenient matters in the above problems can be solved. The above object of the invention can be achieved.

  Hereinafter, the best mode for carrying out the present invention will be described in detail based on embodiments shown in the drawings. FIG. 1 is a schematic bottom view showing a vehicular automatic transmission to which a detent structure of a vehicular automatic transmission according to an embodiment of the present invention is applied. FIG. 2 is a schematic view of the automatic transmission shown in FIG. FIG. 2 is a partially enlarged view showing a detent spring constituting the detent structure and its peripheral configuration as seen from the direction of arrow A in FIG. 1. FIG. 3 is a schematic view showing the automatic transmission in a state seen from the direction of arrow B along the line XX shown in FIG. 4 to 6 are operation explanatory views showing the detent structure of this embodiment. 4A to 4C are partially enlarged views showing the peripheral configuration of the manual plate and the detent spring when a predetermined range is selected by a control lever (not shown) for the automatic transmission shown in FIG. FIG. 4A shows a state where the P range is selected, FIG. 4B shows a state where the N range is selected, and FIG. 4C shows a state where one range is selected.

  FIG. 5 is a schematic diagram showing a manual shaft for rotating the manual plate about the axis center through a control plate connected to the control lever according to the range position selected by the control lever, and its peripheral configuration. FIG. 6 is a schematic diagram showing a control plate that rotates in accordance with the range position selected by the control lever and its peripheral configuration. 1 to 6, reference numeral 1 denotes a detent structure of the present embodiment, 2 denotes a transmission case, and 3 denotes a case main body of the transmission case 2 that houses a transmission mechanism unit, a control valve unit, and the like. .

As shown in FIG. 1, the detent structure 1 of the present embodiment rotates in response to a range position switching operation of a control lever (not shown) by a vehicle driver, and has a plurality of cam grooves 4a on the outer peripheral portion. The manual plate 4 is pivotally supported on the case body 3 by the manual shaft 5, and the rotation of the manual plate 4 corresponds to the rotational position of the manual plate 4 in accordance with the rotation of the manual plate 4. A detent spring 6 that elastically biases the engaging portion 6a at the tip toward the manual plate 4 so as to engage with the cam groove 4a is provided. Then, the engagement between the cam groove 4a of the manual plate 4 and the engaging portion 6a of the detent spring 6 allows the driver to maintain the range position selected by the range position switching operation of the control lever by the driver. Is done. Further, the side surface of the case main body 3b, mating surfaces 3a of the side cover 7 shown in phantom in FIG. 1 is mounted are the formation, in the detent structure 1 of this embodiment, the side of the case main body 3b mating surface 3a and the seating surface formed on the same plane surface (shown for convenience mating surfaces of the same code description) on 3a, the base 6b of the detent spring 6 is seated and fixed, the engagement of the detent spring 6 The part 6a is inserted into the case body 3 as follows.

That is, here, when the base portion 6b of the detent spring 6 is seated and fixed on the seating surface 3a formed on the same plane as the mating surface of the case body 3, as shown in FIG. 6a and together disposed on a side surface of the case body 3 is inserted into the lubricating oil hole 3b of the opening that communicates with the casing body 3, the positioning pins 8 of the base portion 6b of the detent spring 6 with respect to the case main body 3 attached only in and positioning is seated a base 6b of the detent spring 6 to the seating plane 3a of the case body 3, the fastening member (in this case a bolt) 9 to fix the base 6b of the detent spring 6 to the main body case 3. The lubricating oil hole 3b is not newly provided for attaching the detent spring 6, but the side cover for returning the oil flowing into the side cover 7 attached to the case body 3 to an oil pan (not shown). The lubricating oil hole provided so as to be covered with 7 is diverted.

  Further, as shown in FIG. 3, the schematic structure of the automatic transmission for a vehicle in the present embodiment to which the detent structure 1 is applied is as follows. As shown in FIG. 3, a driving force is supplied from a not-shown engine (primary motor) of the vehicle to a torque converter (not shown). The first shaft 10 input via the input shaft and the input rotation of the first shaft 10 are shifted to a predetermined gear position according to the range position selected from the plurality of range positions by the operation of the driver's control lever. An output transmission mechanism section, a second shaft that is arranged in parallel to the first shaft 10 and that transmits the output of the transmission mechanism section, and has a differential device, the output of the transmission mechanism section via the second shaft The transmission case 2 includes a first shaft housing portion 11 for housing the first shaft 10, a second shaft housing portion 12 for housing the second shaft, and a third shaft. It is comprised with the 3rd axis | shaft accommodating part 13 to accommodate. In this automatic transmission, the driver performs a range position switching operation with a control lever, so that six types of range positions (first speed (1), second speed (2), drive (D), neutral ( N), reverse (R), parking (P)), and shift control is performed according to a range selected from the range.

As shown in FIG. 3, a parking mechanism 20 is provided on the first shaft 10 of the vehicle automatic transmission having the above-described configuration. The parking mechanism 20 includes a parking gear 21, a parking pole 22, a return spring 23, a support plate 24 (see FIG. 1), and a parking rod 25 (see FIGS. 1 and 3). Here, as shown in FIG. 3, the parking gear 21 is integrally coupled to the outer peripheral portion of the first shaft 10 of the vehicle automatic transmission. One end of the parking pole 22 is pivotally supported by the case body 3 and disposed. Further, a meshing claw 22a meshing with the parking gear 21 is formed at the other end of the parking pole 22 so as to protrude toward the surface (front surface) facing the parking gear 21, and the surface (back surface) facing the front surface. A convex portion 22b that is pressed toward the center of the parking gear 21 by a cam portion 25a (described later) of the parking rod 25 is formed. The return spring 23 functions to urge the parking pole 22 in a direction to release the engagement between the parking gear 21 and the engagement pawl 22 a of the parking pole 22.

  As shown in FIG. 1, the support plate 24 is substantially U-shaped and has an engaging convex portion 24 a at one end of the U-shape. The engaging projection 24a is configured to engage with a guide hole 4b provided in the manual plate 4 of the detent structure 1 shown in FIG. 1 and to be movable in the guide hole 4b. That is, the support plate 24 is pivotally supported by the case main body 3 so as to be rotatable, and the engaging convex portion 24 a is inserted into the guide hole 4 b of the manual plate 4 and disposed inside the case main body 3. The guide hole 4b here is a circumferential hole extending in the circumferential direction, and one end of the circumferential hole is formed to extend in the radial direction toward the center. Due to the guide hole 4b, when the range position of the manual plate 4 is 1, 2, N range, D range, or R range, the engagement convex portion 24a of the support plate 24 is in the circumferential direction of the guide hole 4b of the manual plate 4. While the support plate 24 is rotatable at a portion extending to the support plate 24, when the range position of the manual plate 4 is in the P range, the engagement convex portion 24a of the support plate 24 is provided with the guide hole 4b of the manual plate 4. The support plate 24 is prohibited from rotating at a portion extending in the radial direction.

  As shown in FIG. 1, the parking rod 25 has a cam portion 25a whose diameter increases toward the tip at one end thereof. As shown in FIGS. 1 and 3, the parking rod 25 is disposed so as to be opposed to the parking gear 21 via a parking pole 22 and supported by the case body 3 so as to be movable back and forth in the axial direction. As shown in FIG. 1, the other end of the parking rod 25 is attached to the other end of the support plate 24 so that the parking rod 25 can move forward and backward in the axial direction of the parking rod 25 according to the rotation of the support plate 24. Connected.

  Next, the operation of the detent structure 1 and the parking mechanism 20 of the present embodiment having the above-described configuration will be described. As will be described later with reference to FIGS. 5 and 6, when the range position of the manual plate 4 is set to the P range in accordance with the driver's operation of the control lever, the detent structure 1 and the parking mechanism 20 are shown in FIG. The state shown in a) is obtained. That is, when the range position of the control lever is switched from a range other than the P range to the P range, the manual plate 4 is detented until the cam groove 4a corresponding to the P range and the engaging portion 6a of the detent spring 6 are engaged. It rotates against the elastic force of the spring 6. Along with this rotation, the engagement convex portion 24a of the support plate 24 engaged with the guide hole 4b of the manual plate 4 extends in the radial direction from the portion extending in the circumferential direction of the guide hole 4b of the manual plate 4. Guided to move to the part. When the support plate 24 is rotated in accordance with the guide and the engaging convex portion 24a of the support plate 24 is located at a portion extending in the radial direction of the guide hole 4b of the manual plate 4, the engaging convex portion 24a is guided to the guide hole. The support plate 24 is prohibited from rotating by abutting against the wall of the portion 4b extending in the radial direction.

  As the support plate 24 rotates, the parking rod 25 connected to the support plate 24 moves below the automatic transmission shown in FIG. As a result, the cam portion 25a of the parking rod 25 and the convex portion 22b on the back surface of the parking pole 22 come into contact with each other, and the parking pole 22 is pressed toward the parking gear 21 as the cam portion 25a expands. Thereby, the meshing teeth 22a of the parking pole 22 and the parking gear 21 mesh with each other, the rotation of the parking gear 21 is locked, and the rotation of the first shaft 10 of the automatic transmission is also locked. As a result, even when torque is input from the wheel side (not shown) of the vehicle, the stopped state of the vehicle is maintained by the locking of the first shaft 10.

  When the range position of the control lever is switched from the P range to another range according to the driver's operation of the control lever, the manual plate 4 has the cam groove 4a and the detent spring 6 corresponding to the switched range position. It rotates against the elastic force of the detent spring 6 until it engages with the engaging portion 6a. Along with this, the engagement convex portion 24a of the support plate 24 moves from the portion extending in the radial direction of the guide hole 4b of the manual plate 4 to the portion extending in the circumferential direction, and the rotation of the support plate 24 in the P range is performed. Movement prohibition is lifted. As a result, the parking pole 22 of the parking mechanism 20 shown in FIG. 3 is released from the vehicle stop state by the parking mechanism 20 in accordance with the urging of the return spring 23 in the meshing release direction from the parking gear 21, and the parking rod 25 is In FIG. 1, the parking pole 22 is released from being pressed by the cam portion 25 a of the parking rod 25.

  When the range position of the manual plate 4 is set to a range position other than the P range, the rotation state of the manual plate 4 and the support plate 24 and the engagement of the support plate 24 in the guide groove 4b of the manual plate 4 are performed. The engagement state of the convex portion 24a is, for example, the state shown in FIG. 4B when the range position of the manual plate 4 is set to the N range, and the state shown in FIG. Become. As shown in FIG. 4B and FIG. 4C, when the range position of the manual plate 4 is set to a range other than the P range, the engagement convex portion 24a of the support plate 24 is as described above. Since the support plate 24 is located at a portion extending in the radial direction of the guide groove 4b and is movable at a portion extending in the radial direction of the guide groove 4b, the support plate 24 is in a rotatable state.

In this embodiment, when the range position of the manual plate 4 is switched, the configuration shown in FIGS. 5 and 6 is adopted. That is, as shown in FIG. 5, the manual plate 4 is connected to one end portion of the manual shaft 5 so as to be integrally rotatable, and the select plate 30 is integrally rotatable to the other end portion of the manual shaft 5. Connected to As shown in FIG. 6 for the P range, the N range, and the 1 range, the select plate 30 is moved to the rotation position corresponding to the switched range according to the shift position switching operation by a control lever (not shown). It is configured to rotate. The select plate 30 here is connected to a control lever (not shown) provided in the driver's cab operated by the vehicle driver via a member such as a wire (not shown).

  With such a configuration, as the select plate 30 and the manual shaft 5 are rotated so as to be in the rotation position corresponding to the range position switched by the range lever switching operation of the control lever, the manual plate 4 is controlled by the control lever. It rotates until the engaging part 6a of the detent spring 6 engages with the cam groove 4a corresponding to the range position switched by. When the manual plate 4 is rotated, the detent spring 6 of the detent structure 1 elastically biases the engaging portion 6 a toward the manual plate 4. As the manual plate 4 rotates, the engaging portion 6a of the detent spring 6 can be engaged with the cam groove 4a corresponding to the rotational position of the manual plate 4 among the plurality of cam grooves 4a. .

  As shown in FIG. 5, the manual plate 4 is provided with a hooking portion 4c protruding from the plate surface. By engaging the engaging portion 4c with a manual valve (not shown) incorporated in the control valve body, the manual plate 4 is rotated to a position corresponding to the range according to the range position switched by the control lever. Accordingly, the manual valve moves forward and backward so as to be in a position corresponding to the range position.

Therefore, in the detent structure 1 for the automatic transmission for a vehicle according to the present embodiment having the above-described configuration, the vehicle rotates according to the range position switching operation of the control lever (not shown) by the driver, and the outer peripheral portion. Along with the rotation of the manual plate 4 provided with a plurality of cam grooves 4a, the manual plate 4 is brought into engagement with the cam groove 4a corresponding to the rotation position of the manual plate 4 among the plurality of cam grooves 4a. detent spring 6 for resiliently biasing the engaging portion 6a toward the, side surfaces of the case body 3 of the automatic transmission, on the seating surface 3a side cover 2 is located on the mating surfaces and flush mounted The base portion 6 b is seated and fixed, and the engaging portion 6 b of the detent spring 6 is inserted into the case body 3.

According to the detent structure 1 of the automatic transmission of the present embodiment having the above-described configuration, the base portion 6b of the detent spring 6 is disposed on the side surface outside the case body 3 of the transmission case 2, and therefore the mounting direction of the side cover 7 The base 6b of the detent spring 6 can be assembled with a fastening member 9 such as a bolt. Therefore, since it is not necessary to provide a space occupied by the detent spring 6 inside the case body 3 of the transmission case 2, there is no limitation due to the arrangement of the detent spring 6 in the layout or the like when configuring the control valve circuit. The space inside the case body 3 of the transmission case 2 can be used effectively. Further, after assembling parts such as a transmission mechanism and a control valve unit inside the case body 3 of the transmission case 2, the base 6 b of the detent spring 6 is connected to the case body 3 of the transmission case 2 by a fastening member 9 such as a bolt. can be fixed, moreover the transmission of the case 2 of the case main body 3 side surface, on the seating surface 3a on mating surfaces flush with the side cover 7 is mounted, the fixation of the base 6b of the detent spring 6 There are no obstructing members attached. Therefore, the base 6b of the detent spring 6 can be easily fixed to the transmission case 2 and the assembling property of the detent spring 6 can be improved. Further, even when the detent spring 6 is replaced, the base 6b of the detent spring 6 can be easily attached and detached by removing the side cover 7 from the case body 3 of the transmission case 2 (claim 1). Corresponding).

In addition, transmission of the case 2 of the case main body 3 side surface, and the base 6b of the detent spring 6 is seated and fixed on the seating surface 3a on mating surfaces flush with the side cover 7 is mounted, the detent spring 6 According to this configuration in which the engaging portion 6a is inserted into the case body 3 of the transmission case 2, the detent spring 6 is fixed to the control valve body. The problem of deterioration in assembling property can be solved, and the assembling property of the control valve unit can be improved (corresponding to claim 1).

Moreover, according to this configuration, the transmission of the case 2 of the case main body 3 side surface, and a seating surface 3a of the mating surfaces 3a and detent spring 6 where the side cover 7 is mounted from that on the same flat surface, shift The seating surface of the detent spring 6 can be processed simultaneously with the processing of the mating surface 3 a of the case body 3 of the machine case 2 with the side cover 7. Therefore, it is not necessary to process only the seating surface of the detent spring 6 when the transmission case 2 is attached to the inside of the case main body 3 or the control valve body, and the number of man-hours can be reduced.

  In the detent structure 1 of the automatic transmission for a vehicle according to the present embodiment, the engaging portion 6a of the detent spring 6 is inserted into the lubricating oil hole 3b provided in the case body 3 of the transmission case 2. The Moreover, as described above, the lubricating oil hole 3b is obtained by diverting the lubricating oil hole provided to return the oil flowing into the side cover 7 attached to the case body 3 to the oil pan (not shown). . According to such a configuration, it is possible to save time for newly securing the installation space for the detent spring 6 and to more effectively utilize the space in the case body 3 of the transmission case 2 (corresponding to claim 2). ).

  Thus, according to the detent structure 1 of the present embodiment, the space inside the case body 3 of the transmission case 2 can be effectively utilized, and the degree of freedom in design can be improved. Therefore, the parking mechanism 20 can be provided on the first shaft 10 of the automatic transmission to which driving force from an engine (not shown) included in the vehicle is input. With this configuration, the effects described below can be obtained.

That is, the input load from the wheel side when the vehicle is stopped is P, the gear ratio (primary reduction ratio) between the first axis and the second axis is r ₁ (r ₁ > 1), and between the second axis and the third axis The gear ratio (secondary reduction ratio) is r ₂ (r ₂ > 1), the load input to the parking mechanism with respect to the input from the wheel (not shown) when the vehicle is stopped, and the parking mechanism is applied to the first shaft 10. If P ₁ is provided, and P ₂ is provided for the parking mechanism on the second shaft,
P ₂ ∝P / r ₂
P ₁ ∝P ₂ / r ₁ = P / r ₂ / r ₁
It can be expressed as. Since r ₁ > 1 and r ₂ > 1 here, P ₁ <P ₂ is satisfied. For this reason, the load that the parking mechanism receives from the wheel (not shown) side is smaller in the configuration in which the parking mechanism is provided on the first shaft 10 than in the configuration in which the parking mechanism is provided on the second shaft of the automatic transmission. This is advantageous because the parking mechanism can be reduced in weight and size (corresponding to claim 3).

  As described above, based on the illustrated example, the detent structure of the automatic transmission for a vehicle according to the present invention is not limited to the configuration described in the above embodiment, but is within the scope of the configuration described in the claims. Of course, it can be changed appropriately.

1 is a schematic bottom view showing a vehicular automatic transmission to which a detent structure of a vehicular automatic transmission according to an embodiment of the present invention is applied. FIG. 2 is a partial enlarged view showing a detent spring constituting a detent structure and its peripheral configuration of the automatic transmission shown in FIG. 1 as viewed from the direction of arrow A in FIG. 1. It is the schematic which shows the automatic transmission of the state seen from the arrow B direction along the XX line shown in the said FIG. FIG. 2 is a partial enlarged view of a peripheral configuration of a manual plate and a detent spring when a predetermined range is selected by a control lever (not shown) in the automatic transmission shown in FIG. 1, and (a) shows a state where a P range is selected. (B) shows a state where the N range is selected, and (c) shows a state where one range is selected. FIG. 5 is a schematic diagram showing a manual shaft for rotating a manual plate around an axis center through a control plate connected to the control lever according to a range position selected by the control lever, and a peripheral configuration thereof. It is the schematic which shows the control plate rotated according to the range position selected with the control lever, and its periphery structure.

Explanation of symbols

1 Detent structure 2 Transmission case 3 Case body (transmission case body)
3a mating surface (sitting surface)
3b Lubricating oil hole 4 Manual plate 4a Cam groove 4b Guide hole 4c Engagement part 5 Manual shaft 6 Detent spring 6a Engagement part
6b base portion 7 side cover 8 positioning pin 9 fastening member 10 first shaft 11 first shaft housing portion 12 second shaft housing portion 13 third shaft housing portion 20 parking mechanism 21 parking gear 22 parking pole 22a meshing claw 22b convex portion 23 return Spring 24 Support plate 24a Engaging convex part 25 Parking rod 25a Cam part 30 Select plate

Claims (3)

A manual plate that rotates according to the range position switching operation of the control lever by the driver and has a plurality of cam grooves on the outer periphery,
As the manual plate rotates, the tip engaging portion is elastically biased toward the manual plate so as to engage with the cam groove corresponding to the rotational position of the manual plate among the plurality of cam grooves. With detent spring,
An automatic transmission for a vehicle configured to hold a range position selected by a range position switching operation of the control lever by engagement of the cam groove of the manual plate and the tip engagement portion of the detent spring. In the detent structure,
The automatic transmission of the transmission case of mating surfaces which are formed on the body side for mounting the side cover that covers the opening of the main body side is mounted on the main body side surface coplanar with, for the detent spring A seating surface is formed,
A detent structure for an automatic transmission for vehicles, wherein a base portion of the detent spring is seated and fixed on the seating surface , and the tip engaging portion is inserted into the main body. 2. The automatic transmission for a vehicle according to claim 1, wherein a leading end engaging portion of the detent spring is inserted into a lubricating oil hole as the opening provided on a side surface of the transmission case. Detent structure.   The parking mechanism of the vehicle automatic transmission is provided on a first shaft of the vehicle automatic transmission to which driving force is input from the motor of the vehicle, and the detent structure is coupled to the parking mechanism. The detent structure of the automatic transmission for vehicles according to claim 1 or 2, characterized by these.

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