JP2008232327A - Driving part mounting structure for select assist device for automatic transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a driving part mounting structure for a select assist device for an automatic transmission, achieving reduced cost. <P>SOLUTION: The driving part mounting structure comprises a casing 1 on which a motor 2, a gear shaft 31 and a gear 32 are mounted, a gear cover 5 for covering at least parts of the motor 2, the gear shaft 31 and the gear 32, an engaging part 13 and an engaging part 52 provided for the casing 1 and the gear cover 5 to be assembled together with their members engaging each other, respectively, and a storage hole 11 and the engaging part 52 provided for holding the motor 2 between the casing 1 and the gear cover 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention belongs to the technical field of a drive unit mounting structure of a select assist device for an automatic transmission.

Conventionally, the play groove of the first rotating part and the protrusion of the second rotating part are engaged and connected by a play coupling mechanism having a play amount, and the relative position of the first rotating part and the second rotating part is detected by a position sensor. Thus, the drive of the assist actuator is controlled so that the relative position is in the vicinity of the midpoint (see, for example, Patent Document 1).
JP 2006-64003 A (page 2-14, full view)

  However, in the past, cost reduction due to ease of assembly and reduction in the number of parts has been insufficient and has been a problem.

  The present invention has been made paying attention to the above problems, and an object of the present invention is to provide a drive part mounting structure for a select assist device of an automatic transmission that can reduce the cost.

  In order to achieve the above object, in the present invention, a select lever and a select position switching device of an automatic transmission are connected by a select operation force transmission system, and the select operation force transmission system is a motor that assists a select operation force by a driver. In a select assist device for an automatic transmission provided through a gear mechanism, a device main body to which the motor or gear mechanism is attached, a cover body that covers at least a part of the motor or gear mechanism, the device main body, and the cover Each of the engaging parts provided so that the body is assembled by the engagement of the respective members, and an accommodating holding part provided so as to hold the motor between the apparatus main body and the cover body. , Provided.

  Therefore, in the present invention, a sufficient cost reduction can be performed.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment for realizing a drive part mounting structure for a select assist device for an automatic transmission according to the present invention will be described below based on a first embodiment corresponding to the first, second, and third aspects of the invention.

First, the configuration will be described.
FIG. 1 is an explanatory exploded perspective view showing a drive unit mounting structure of a select assist device for an automatic transmission according to a first embodiment.
FIG. 2 is an explanatory exploded perspective view showing a drive part mounting structure of the select assist device of the automatic transmission according to the first embodiment.
In the drive part mounting structure of the select assist device of the automatic transmission according to the first embodiment, the motor 2 that applies the assist force, the gear 32 that transmits the output of the motor 2, and the gear shaft 31 are configured as the drive part mounting structure.

In this drive part mounting structure, the housing 1, the motor 2, the gear shaft 31, the gear 32, the bus bars 41 and 42, the gear cover 5, the select lever 61, the knob 62, and the rotating body 7 are the main components.
The housing 1 is a device main body portion in which a portion of the select lever 61 that performs a select operation and a portion that applies assist force to the transmission system for changing the operation position are assembled in the select assist device of the automatic transmission.
Further, the housing 1 includes a housing hole 11 for housing the motor 2, an upper surface of the housing hole 11, projections 12 provided at three locations, an engaging portion 13 that engages with an engaging portion 52 of the gear cover 5, and a gear shaft. Two shaft holes 14 that pivotally support 31 and a slit 15 that engages with the terminal fixing portion 51 are provided.

The motor 2 outputs an assist force as a rotational drive force in accordance with a drive command value from a separately provided control unit. Further, two terminals 212 are provided so as to protrude from the end surface of the motor on the output shaft 213 side. Then, a flange-shaped flange portion is provided with a step difference from the end surface of the output shaft 213, and through holes 211 are provided at three positions of the flange portion so as to penetrate the flange portion in the axial direction of the output shaft 213.
Although not shown in FIGS. 1 and 2, a gear is attached to the output shaft 213, and a driving force is transmitted to the gear shaft 31.

The gear shaft 31 is provided with gear teeth on the outer periphery, and one end is press-fitted into the gear 32 to rotate integrally.
The gear 32 is larger in diameter than the gear shaft 31 and transmits the driving force of the motor 2 to the gear shaft 31 to the wheel gear 71 of the rotating body 7.
The bus bars 41 and 42 are provided with bus portions that engage with the terminals downward from both ends of the L-shaped bar portion.

The gear cover 5 includes a cover portion 53 that covers a part of the gear 32. The cover portion 53 prevents foreign matter from entering the gear 32 and the like from the outside. Moreover, the terminal 2 of the motor 2 is attached to the terminal fixing | fixed part 51 provided in two places, and functions as a connector. A part of the main body is a part to be held by the installed motor 2, and engaging portions 52 are provided at a plurality of positions at the lower end of the main body.
The select lever 61 is assembled with the knob 62 and is pivotally supported on the housing 1 so as to input a select input by a turning operation.
The rotating body 7 is provided with a gear tooth surface on the outer peripheral surface of the arc portion to form a wheel gear 71, and transmits the driving force from the gear 32 to the control lever side of the automatic transmission.

Next, a system configuration of the automatic transmission select assist device will be described.
FIG. 3 is a schematic diagram showing a system configuration of the select assist device for the automatic transmission according to the first embodiment.

As shown in FIG. 3, the selection assist device for the automatic transmission according to the first embodiment includes an input unit using the select lever 61 and the knob 62, the motor 2, the controller 30, the control cable 40, and the automatic transmission 50 as main components. Yes.
In the select assist device of the automatic transmission, the operation input of the select position by the input unit by the select lever 61 and the knob 62 is detected as the operation force by the torque sensor or the operation position by the position sensor. Then, the motor 2 is driven under the control of the controller 30 so that the control arm 501 of the automatic transmission 50 follows in accordance with the operation input, the assist force is output, and the automatic transmission via the control cable 40 by the output lever 72. In this configuration, 50 control arms 501 are operated. In addition, the structure via a mechanism may be sufficient without providing the control cable 40.

The operation will be described.
[Assist control]
As described above, the range switching control device for the automatic transmission according to the first embodiment may be either one that applies the assist force based on the operation force or one that applies the assist force to the operation position.
In the case of applying assist force based on the operation force, control is performed so that the assist force of the motor 2 is applied to the operation force by the select lever 61 and the knob 62, and switching operation (select operation) is possible with a light operation. become.
Since the select lever 61 and the knob 62 are connected to the automatic transmission 50 as in the prior art, manual operation is possible when an abnormality occurs.

  Next, in order to give an assist force to the operation position, a play amount is provided between the operation by the select lever 61 and the knob 62 and the connection with the automatic transmission 50 side, and the select lever 61 and the knob 62 are used. In the operation, a light force relationship of the detent structure described above is provided. Then, by moving the motor 2 based on the operation position, during the normal operation, this play amount is maintained, so that the same effect as the shift-by-wire is obtained, and the parking lock comes off due to extreme sudden operation or steep slope, Only when an abnormality occurs, manual operation is possible as in the prior art, and an assist force is applied at that time.

[Easy assembly by the drive mounting structure]
An easy assembling operation in the select assist device of the automatic transmission according to the first embodiment will be described.
First, the motor 2 is inserted into the housing hole 11 of the housing 1, and the three protrusions 12 provided on the upper surface of the housing hole 11 are fitted or press-fitted into the through holes 211 of the flange of the motor 2, The motor 2 is assembled to the housing 1.
Note that a gear is assembled in advance to the output shaft 213 of the motor 2.

Next, the gear shaft 31 is inserted into one shaft hole 14 of the housing 1, and the shaft portion of the gear 32 is inserted into the other shaft hole 14. Then, between the two shaft holes 14, the shaft portions of the gear shaft 31 and the gear 32 are assembled so as to be integrated by press-fitting or the like.
As a result, as shown in FIGS. 1 and 2, the gear shaft 31 and the gear 32 that are integral with each other are rotatably supported by the two shaft holes 14, and the shaft holes 14 of the gear shaft 31 and the gear 32 are also supported. The outer diameters of both diameters are prevented from being detached from the shaft hole 14.

Then, the tooth surface on the outer periphery of the gear shaft 31 is engaged with the gear of the output shaft 213 of the motor 2. Further, the gear 32 separately engages the tooth surfaces with the wheel gear 71 of the rotating body 7 assembled to the housing 1.
As a result, the rotating body 7 can be driven by the motor 2.
Next, the L-shaped bus bars 41 and 42 are assembled to the gear cover 5 using the terminal fixing portion 51 of the gear cover 5.
Then, the bus bars 41 and 42 assembled to the gear cover 5 are assembled to the two terminals 212 protruding upward from the upper surface of the motor 2 assembled to the housing 1, and the gear 32 and the gear shaft are assembled with the gear cover 5. The gear cover 5 is assembled to the housing 1 so as to cover 31 and the like.

At this time, the gear cover 5 engaging portion 52 is assembled so as to engage with the engaging portion 13 of the housing 1.
Although not shown in the drawings, the movement of the output shaft 213 of the motor 2 in the axial direction is made such that a part of the gear cover 5 abuts on the upper surface of the motor 2 or a part of the collar part or has a slight gap. To prevent problems with gear meshing and the like.
And in the part of the terminal fixing | fixed part 51 of the gear cover 5, a part of two bus bars 41 and 42 are exposed, and a harness etc. can be attached now.
Also,

As described above, the assembly of the motor 2 and the select lever 61 of the automatic transmission select assist device, the motor 2 and the gear shaft 31, and the gear 32 of the knob 62 portion eliminates the screw for fixing the motor, The connector for the motor harness is abolished, the number of man-hours for connecting the harness is reduced, and the screw for fixing the harness connector is abolished.
For this reason, cost reduction by reducing the number of parts, cost reduction by deleting the fastening process of the process, and cost reduction by simplifying the process are performed.
Therefore, the cost is greatly suppressed.

Next, the effect will be described.
In the range switching operation structure and the range switching control device of the automatic transmission according to the first embodiment, the effects listed below can be obtained.
(1) The select lever 61 and the control arm 501 of the automatic transmission 50 are connected by the control cable 40 and the mechanism, and the motor 2 that assists the select operation force by the driver is connected to the rotating body 7 via the gear shaft 31 and the gear 32. In the select assist device of the automatic transmission 50 provided as described above, the housing 1 to which the motor 2, the gear shaft 31, and the gear 32 are attached, and the gear cover 5 that covers at least a part of the motor 2, the gear shaft 31, and the gear 32, The housing 1 and the gear cover 5 are engaged by the respective members, and the respective engaging portions 13 and 52 and the motor 2 that are assembled to each other are assembled by the housing 1 and the gear cover 5. Since the receiving hole 11 and the engaging portion 52 provided for clamping are provided, the cost can be reduced sufficiently by eliminating the screw and the process for fixing the motor 2. It can be carried out.

  (2) Bus bars 41 and 42 that are electrically connected to the terminals of the motor 2 in the holding direction of the receiving hole 11 and the engaging portion 52 are provided on the gear cover 5, and the motor 2 is held between the housing 1 and the gear cover 5. Assembling also serves as an assembly of the electrical connection between the motor terminal 212 and the bus bars 41 and 42, and the gear cover 5 also serves as a connector. Costs can be sufficiently reduced by eliminating man-hours, connector assembly screws, and screw assembly processes.

  (3) Since the gear cover 5 covers the outside of the gear shaft 31 and the gear 32 in the axial direction, the gear cover 5 can be prevented from coming off in the axial direction.

Further, the operational effects of the first embodiment will be additionally described.
FIG. 4 is an explanatory view showing another device example of the motor assembly structure of the select assist device of the automatic transmission.
For example, with respect to the select assist device, a structure as shown in FIG.
When assembling the motor 101 to the housing 106 containing a gear or the like, as shown in FIG. 4, the motor 101 and seat surfaces 107 a and 107 b to be brought into contact with the housing side are provided. Fastened with screws 102. This fastening is performed at two places including the opposite side (not shown).

Further, the terminal on the output shaft side of the motor 101 is a portion without the seating surface 107 a on the housing side, and the connector 104 is connected, and the connector 104 and the housing 106 are fixed by fastening the screw 103. A harness 105 is attached to the connector 104, and another connector is connected.
The motor assembly structure that can be considered in this way results in a structure in which two screws are used to fix the motor and connectors and harnesses are attached to the motor terminals.

  On the other hand, in the drive unit mounting structure in the select assist device of the automatic transmission according to the first embodiment, the parts and processes related to the motor and housing screw fastening, the connector and housing screw fastening, the harness to the external connection connector, and the like. It can be deleted, and the assembly process can be made easier, and the cost can be reduced.

  As mentioned above, although the range change control apparatus of the automatic transmission of this invention has been demonstrated based on Example 1, as for a concrete structure, it is not restricted to these Examples, Each claim of a claim Design changes and additions are permitted without departing from the spirit of the invention.

  As described above, even if the automatic transmission range switching control device assists while always transmitting the operating force to the automatic transmission side, the operating force is usually transmitted to the automatic transmission side in the same way as by-wire. It may be driven by an actuator without being transmitted to the automatic transmission, and the range switching operation structure of the automatic transmission according to the first embodiment may be used for an automatic transmission that does not assist.

FIG. 3 is an explanatory exploded perspective view illustrating a drive unit mounting structure of a select assist device for an automatic transmission according to a first embodiment. FIG. 3 is an explanatory exploded perspective view illustrating a drive unit mounting structure of a select assist device for an automatic transmission according to a first embodiment. It is the schematic which shows the system configuration | structure of the selection assistance apparatus of the automatic transmission of Example 1. FIG. It is explanatory drawing which shows the other example of a motor assembly | attachment structure of the selection assistance apparatus of an automatic transmission.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 11 Accommodating hole 12 Protrusion 13 Engagement part 14 Shaft hole 15 Slit 2 Motor 211 Through-hole 212 Terminal 213 Output shaft 5 Gear cover 51 Terminal fixing part 52 Engagement part 53 Cover part 7 Rotating body 30 Controller 31 Gear shaft 32 Gear 40 Control cable 41 Bus bar 42 Bus bar 50 Automatic transmission 61 Select lever 62 Knob 71 Wheel gear 72 Output lever 101 Motor 104 Connector 105 Harness 106 Housing 107a Seat surface 107b Seat surface 501 Control arm

Claims (3)

An automatic transmission in which a select lever and a select position switching device of an automatic transmission are connected by a select operation force transmission system, and a motor for assisting a select operation force by a driver is provided in the select operation force transmission system via a gear mechanism. In the machine select assist device,
An apparatus main body to which the motor and the gear mechanism are attached;
A cover body covering at least a part of the motor and gear mechanism;
Each engagement part provided so that the device main body and the cover body may be assembled by engagement of each member;
A holding and holding portion provided to hold the motor between the apparatus main body and the cover body;
A drive part mounting structure for a select assist device for an automatic transmission, comprising: In the drive part mounting structure of the select assist device of the automatic transmission according to claim 1,
A connector terminal portion that is electrically connected to a terminal of the motor in the clamping direction of the accommodating clamping portion is provided on the cover body;
The assembly in which the motor is sandwiched between the apparatus main body and the cover body has a structure in which electrical connection between the motor terminal and the connector terminal portion is combined, and the cover body also serves as a connector.
A drive part mounting structure for a select assist device of an automatic transmission. In the drive part mounting structure of the select assist device according to claim 1 or claim 2,
The drive body mounting structure for a selection assist device of an automatic transmission, wherein the cover body covers an outer side in the axial direction of the gear mechanism.

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