JP2957336B2 - Method for assembling unbalance mass of fluid transmission device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a fluid transmission device to an engine for reducing unbalance mass.

[0002]

2. Description of the Related Art In an automatic transmission in which a starting device is a fluid transmission device (fluid coupling, torque converter), the fluid transmission device is a component having a large inertial mass. This may cause vibration during engine idling, muffled noise during mid-high speed driving, generation of unpleasant timbres, etc., which may impair the ride comfort of the vehicle. Therefore, the fluid transmission device has its rotational balance corrected by itself, but unlike the element consisting of only a rigid body, it operates with the working fluid and some air contained inside, so some Residual rotational imbalance cannot be avoided.

Conventionally, in order to connect a torque converter of an automatic transmission to an engine crankshaft in a process of assembling the automatic transmission to an engine prior to mounting on a vehicle, a central hole at a rear end of the crankshaft is provided with a front end of the torque converter. The centerpiece is fitted and centered, and then the fastening bolts are positioned in the multiple mounting holes in the drive plate at the rear end of the crankshaft.
Thereafter, the assembling work was performed in the procedure of fastening each bolt.

[0004]

However, since the shafts of the engine and the automatic transmission are placed in a horizontal state at the time of assembling, according to the above-mentioned prior art, the diameter of the center hole at the rear end of the crankshaft and the front end of the torque converter are different. Due to the inevitable play with the diameter of the center piece, the center axis of the center piece and the axis of the crankshaft are assembled by being shifted by the lowering of the axis on the automatic transmission side due to its own weight. If the direction coincides with the unbalance direction of the torque converter itself,
The above problems are exacerbated.

In view of such circumstances, the present invention relates to a fluid transmission device which corrects an unavoidable rotational imbalance in a fluid transmission device by using an assembly error in a process of assembling the automatic transmission to an engine. An object of the present invention is to provide an unbalance mass reduction assembling method.

[0006]

Means for Solving the Problems In order to solve the above problems, the present invention provides a step of measuring an unbalance direction during rotation of a single fluid power transmission device and providing an instruction means at a predetermined position according to the unbalance direction. When assembling the fluid transmission to the engine in a state where the rotation axes are horizontally oriented with respect to each other, the radial direction with respect to the unbalance direction around the axis of the fluid transmission while visually confirming the indicating means. The opposite position is directed to the lowermost position, and the rotation on the engine side is performed.
First centering means for the shaft and the rotating shaft on the side of the fluid transmission.
The direction of the play created between the second centering means and the
And a step of fastening the fluid transmission device and the rotating member of the engine by a fastening means while maintaining the balance direction and the state .

[0007]

In the unbalanced mass reducing assembling method according to the present invention having such a configuration, the assembling operation is simply added to the conventional assembling method while visually recognizing the indicating means. In the attaching process, it is possible to correct the rotational imbalance unavoidable in the fluid transmission device including the assembly error, and it is possible to reduce vibrations during idling of the vehicle engine, muffled sounds during running, and generation of unpleasant timbres, and drive You can correct the balance of the system.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. This method is characterized by a marking step incorporated in a step of measuring and correcting an imbalance during rotation of the fluid transmission device alone and an imbalance reduction assembling step incorporated in a step of assembling the fluid transmission device to the engine. I do. Hereinafter, these steps will be described step by step.

FIG. 2 shows a marking process. First,
As shown in (a), as in the conventional process, the torque converter 1 is mounted on a turntable T1 configured as a balance tester.
The unit is placed with its set block 11 down, the center piece 12 fitted to the measuring part Ta, and the inner circumference of the lock-up clutch hub 13 and the one-way clutch inner race 14 in the torque converter 1 and the outer circumference of the impeller hub 15. Is inserted from above from above. The initial unbalance amount and the direction are measured while rotating the turntable T1 in the state where the centering and the end surface are positioned in this manner.

Next, the jig J is removed, and the torque converter 1 alone is moved to another work table T2 in the next step, as shown in FIG. After the positioning, based on the measurement result in the previous step, the mass balance 16 for correction having a weight not exceeding the unbalance amount is attached to the opposite side of the unbalance direction by spot welding to correct the initial imbalance.

Further, as shown in (c), the torque converter 1 alone is returned to the turntable T1 in the previous step again, and the torque converter 1 is similarly positioned and the corrected imbalance amount and direction are confirmed. If necessary, make corrections in the same procedure again. Then, in this step, the indicating means is provided at a position visible from the recess on the engine side at the time of subsequent assembly to the engine. In this example, the pointing means is the mark 17 and its position is in the direction of the minimum amount of imbalance, that is, on the opposite side of the axis from the direction of the final residual unbalance. Note that this position may be determined in relation to the visual recognition position, and the mark 1 is placed at a specific position.
The position may be any position as long as the direction in which the unbalance amount is minimum is directed to the lowermost position when 7 is adjusted.

Next, there is, of course, a process of assembling the torque converter into the transmission, but since this process is not particularly different from the conventional process, the description is omitted, and the assembly process shown in FIG. 1 will be described. . As shown in (d), the automatic transmission M and the engine E are placed in a state where their rotation axes, that is, the crankshaft 2 and the power transmission shaft 18 are horizontally oriented. In this state, the guide pin P is implanted in the set block 11 at an appropriate position of the torque converter 1 incorporated in the automatic transmission M, and the mark 17 is visually recognized through the recess at the bottom of the engine E and directed downward. Guide pin P
Hole 23a of the drive plate 22 and the center hole 23 as the first centering means of the crankshaft end 21 and torque.
The automatic transmission M is combined with the engine E using the centerpiece 12 as the second centering means of the power transmission shaft of the converter as a guide. By this operation, the plurality of fastening holes 11a to 11f provided in the torque converter 1 (see FIG. 1F) and the drive plate 2 serving as a rotating member on the engine E side.
The plurality of fastening holes 22a to 22f (see (f) in FIG. 1) provided in 2 are naturally aligned with each other.

Here, when the guide pin P is pulled out and the center piece 12 at the front end of the torque converter 1 is supported by the center hole 23 of the crankshaft 2, the fitting portion is enlarged and exaggerated to (e '). As shown, when the automatic transmission M leans forward due to its own weight, the outermost lowermost surface of the center piece 12 is
Is supported by the lowermost inner peripheral surface, and a play G is generated in the upper part.
The direction of the play G is a rotational unbalance direction due to the relationship with the mark 17. In this state, the bolt B is fastened to the fastening hole 22a as shown in FIG. After the bolts B are tightened, the remaining tightening holes 22b to 22 at the matched positions as shown in FIG.
f, 11b to 11f are fastened by bolts while rotating the drive plate 22 by one hole pitch or alternately at diagonal positions.

According to the method of the above embodiment, when the bolt B is fastened with the mark 17 attached in advance in the balance correction step directed downward, the play G
Is formed and the front end of the power transmission shaft 18 is in an assembled state eccentric to the rear end of the engine crankshaft 2 in a predetermined direction. Can be automatically corrected together with the residual unbalance due to the error at the time of assembly.

[Brief description of the drawings]

FIG. 1 is a process diagram schematically showing an assembling process of an embodiment.

FIG. 2 is a process diagram schematically showing an imbalance correction process of the embodiment.

[Description of Signs] E Engine B Bolt (tightening means) G Play gap 1 Torque converter (fluid transmission) 2 Crankshaft (rotary shaft) 12 Centerpiece (second centering means) 17 Mark (indicating means) 18 Power transmission shaft (rotating shaft) 22 Drive plate (rotating member) 23 Center hole (first centering means)

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shuji Kato 10 Takane, Fujii-machi, Anjo, Aichi Prefecture Inside Aisin AW Co., Ltd. (72) Inventor Yoshiharu Harada 1, Toyota-cho, Toyota-shi, Aichi Prefecture Toyota Motor (56) References JP-A-63-210437 (JP, A) JP-A-59-65660 (JP, A) (58) Fields studied (Int. Cl. ⁶ , DB name) B60K 17 / 10 F16F 15/30-15/32 F16H 41/24

Claims (1)

(57) [Claims] 1. A step of measuring an unbalance direction during rotation of a single fluid transmission device and applying an indicating means to a predetermined position in accordance with the unbalance direction; When assembling the transmission to the engine,
While visually recognizing the indicating means, direct a position radially opposite to the unbalance direction around the axis of the fluid transmission to the lowest position, and
A first centering means and a second shaft of the rotating shaft on the side of the fluid transmission device.
Direction of the gap generated between the centering means and the
A step of fastening the fluid transmission device and the rotating member of the engine with fastening means while maintaining the state of the fluid transmission device in an unbalanced mass. Method.