JPS59204733A - Torque detecting apparatus for vehicle - Google Patents

Abstract

PURPOSE:To avoid the generation of sound of strike when an engaging member is engaged with a member to be engaged, by providing buffer members on one side of the facing parts of the member to be engaged and the engaging member of an engaging mechanism. CONSTITUTION:When an output shaft 10a is rotated, the rotary force of a flywheel 10 is transmitted to a rotary body 20 through plate springs 30, and the rotary body 20 is rotated. When the load is increased by the engagement of a clutch 13, each plate spring 30 is deflected. A phase difference is generated at a relative rotary angle position of each projection 23 of the rotary body 20 with respect to each projection 14 of the flywheel 10. Then, a torque-signal generating circuit M generates a torque signal through electromagnetic pickups 50a and 60. When the phase difference reaches the value corresponding to the allowable deflection amount of each plate spring 30, a projection 43 of an annular boss 11 are engaged with projecton 41 of the rotary body 20. Buffer members 41a and 42a such as rubber are fixed to the projections 41 and 42. Sound of strike generated at the time of engagement is absorbed to the large extent, and noises from an engaging mechanism 40 are reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a torque detection device, and particularly to a vehicle torque detection device suitable for detecting the torque of a vehicle prime mover.

Conventionally, this type of vehicle torque detection device includes a first rotating body provided on an output shaft on the motor side of the vehicle so as to rotate integrally therewith, and a load side input disposed coaxially with the output shaft. A second rotating body is provided on the shaft to face the first rotating body so as to rotate integrally therewith, and a second rotating body is connected between the two rotating bodies so that when the output shaft rotates, the second rotating body is connected to the input shaft. an elastic member that causes elastic deformation in response to a load that causes the elastic member to be elastically deformed in response to a buckling load; When the allowable phase difference corresponding to the allowable amount of elastic deformation of Some devices are equipped with a locking mechanism having a locking mechanism, detect the phase difference, and generate it as a torsion signal representing torsion corresponding to the amount of elastic deformation of the elastic member.

However, in such a configuration, although the engagement mechanism is provided to prevent the amount of elastic deformation of the elastic member from increasing beyond its allowable amount, the phase difference When the phase difference is reached and the engagement member is engaged with the member to be engaged, there is a problem in that a striking sound is generated from this engaged portion.

The present invention has been made in response to the above problem, and its purpose is to provide a torque detection device for a vehicle in which the locking member of the locking mechanism described above engages with the locked member. The purpose is to prevent the sound of impact from occurring even when the impact is made.

In order to achieve such an object, a structural feature of the present invention is that in the above-mentioned vehicle torque detection device, a buffer member is provided on one of the opposing portions of the secured member and the engaging member. It is in.

By configuring the present invention in this manner, even if the above-mentioned phase difference reaches its permissible phase difference and the engaging member engages with the engaged member, this engagement will not occur as described above. Since this is done with a buffer member interposed, the impact sound caused by the engagement is absorbed by the buffer member, and as a result, the generation of unnecessary noise from the torque detection device can be reduced.

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. Figs. 1 and 2 show an example of a vehicle torque detection device according to the present invention. The torque detection device has a torque sensor S, which includes a flywheel/l/10 and an annular rotating body 20 facing the flywheel/l/10. flywheel 10
connects the annular boss 11 to the output shaft 10a of a vehicle prime mover.
The one-way rolling element 20 is fitted onto the tip of the annular boss 11 and assembled with a plurality of bolts 12 to 12, and the one-way rolling element 20 is rotatable relative to the stepped part 11a of the annular boss 11 at its inner peripheral edge 21. It is fitted in such a way that it cannot move in the axial direction.

Between the flywheel 10 and the rotating body 20, a plurality of leaf springs 60 to 60 have their respective ends fitted into the outer circumference of the annular boss 11 and the annular stepped portion 22 of the rotating body 20, These leaf springs 60 to 60 are radially connected in the radial direction at equal angular intervals.
When the clutch 16 is engaged under the rotation of the flywheel 10, the rotating body 20 is deflected in the opposite direction of rotation in response to the load applied to the rotating body 20 when the clutch 16 is engaged. In this case, the amount of deflection of each of the leaf springs 60 to 0 corresponds to the torque of the prime mover. In addition, the clutch 16
The input shaft 13a is disposed coaxially with the output shaft 10.2, and when engaged, the clutch gray 113b is pressed against the back of the rotating body 20 of the clutch facing 13cK and integrated with this rotating body 20. rotate.

Further, a locking mechanism 40 is provided between the flywheel 10 and the rotating body 20, as shown in FIG.
This engagement mechanism 40 includes a pair of protrusions 41.3 which are spaced apart from the annular step 22 of the rotating body 20 toward the outer periphery of the annular bone 11 between the pair of leaf springs 30.3. 42, and a protrusion 46 that protrudes from the outer periphery of the annular boss 11 between the pair of leaf springs 30 and 30 and is loosely fitted between both protrusions 41 and 42. Also, the protrusion 4 of both protrusions 41 and 42
In each opposing portion to the tip both sides 43a and 43b of 6,
M front members 41a, 42 made of rubber etc. which constitute the main part of the present invention
a are fixed respectively, and the amount of deflection of each of the leaf springs 60 to 60 is zero, the distance between the buffer member 41a and the tip side portion 46.2 of the protrusion 46, and the distance between the buffer member 42a and the tip side portion of the protrusion 46. 43b is the maximum, and each leaf spring 6
When 0 to 6 degrees reaches the allowable deflection amount, the buffer member 41.1
2 and the distal side portion 43.2 (or the buffer member 42.2
and the distal end side portion 46b). In addition, in this embodiment, the locking mechanism 40 is connected to the clutch input shaft 13.2.
There are two symmetrical locations.

A plurality of protrusions 14 and 23 are formed at equal angular intervals at mutually corresponding angular positions on each outer peripheral edge of the flywheel/l/10 and the rotating body 20.
4.23, a pair of electromagnetic pickups 50 and 60 assembled to the clutch housing 131) face outward to form a magnetic relationship, respectively. Electromagnetic pickup 5'0
When facing each protrusion 14 of the flywheel 10 in sequence, it magnetically detects each protrusion 14 in sequence and generates a series of detection signals a.
On the other hand, when the electromagnetic pickup 60 sequentially faces each protrusion 26 of the rotating body 20, it magnetically sequentially detects each protrusion 26 and generates a series of detection signals b (sixth
(see figure). In FIG. 1, reference numeral 15 indicates a ring gear, and reference numeral M indicates a torsion signal generation circuit connected to both electromagnetic pickups 50 and 60.

In this embodiment configured as described above, the clutch 16
When the output shaft 10a rotates in the direction of the arrow shown in FIG.
The rotation force is transmitted through each leaf spring 60 to 60 to rotate. In this case, since the output shaft 1012 rotates under no load, the rotating body 20 is rotated in the same phase as the flywheel/L'10 without bending of each of the leaf springs 60 to 3o.

In such a state, when the reverse load increases during engagement of the clutch 16, each leaf spring 6o is bent, and the flywheel w10 (D) of each protrusion 26 of the rotating body 20 is positioned at a relative rotational angle position with respect to each protrusion 14. A phase difference occurs.As a result, the electromagnetic pickup 5o touches each protrusion 1 of the flywheel/l/10.
4 is sequentially detected and generated as a detection signal a, and the electromagnetic pickup 6° sequentially detects each protrusion 26 of the rotating body 20 to generate a detection signal S. Then, the torque signal generation circuit M detects the difference in the rise timing of the rain detection signals a, l),
That is, the phase difference t (see Figure 6) is calculated, and the linear relationship τ-Kt/T (see Figure 4) between the predetermined phase difference t and the torque (hereinafter referred to as torque τ) is calculated. The torque τ is calculated according to the base calculation phase difference t, and this is generated as a torque signal. Note that the symbol T is the period of the detection signal a (see Figure 6).
, and the symbols indicate constants.

In this state, as the phase difference t gradually increases as shown in FIG. 6, the amount of deflection of each leaf spring 6 degrees increases accordingly, and the protrusion 46 of the engagement mechanism 40 gradually approaches the protrusion 41. do. When the phase difference t reaches a value corresponding to the allowable amount of deflection of each leaf spring 60, the protrusion 46 moves to its tip side 43.
It engages with the inner wall of the tip of the protrusion 41 at point a. In this case, since the locking is performed via the buffer member 41a, the impact sound that is expected to be generated during this locking is caused by the buffer member 41a.
The noise is largely absorbed by the locking mechanism 4°, so that the generation of unnecessary noise from the locking mechanism 4° can be reduced. Further, since the above-mentioned degree of retention is relaxed by the buffer member 41.2, the retention mechanism 4o is not damaged.

In addition, in the above description of the operation, the case where the output shaft 1oa rotates in the direction of the arrow shown in FIG. 1 was explained.
Alternatively, even when the output shaft 10a rotates in the direction opposite to the arrow shown in the figure, the protrusion 46 of the engagement mechanism 40 is attached to the inner wall of the distal end of the protrusion 42 by the distal end side portion 43b of the protrusion 46 of the engagement mechanism 40.
2, the same effect as described above can be achieved. First, the second embodiment of the present invention is explained in the fifth embodiment.
Referring to FIG. 6 and FIG. 6, in this embodiment, a torque sensor B 1 is employed in place of the torque sensor S in the previous embodiment. torque sensor 5l
ID torsion bar 7o is provided, and this torsion bar 70 has its both ends 71 and 72 connected to the tip of the output shaft 1oa of the prime mover and the input shaft 13a of the clutch 16, respectively.
is integrally and coaxially connected to the tip of the Annular external gears Ela, &ob are fitted into both i parts 71 and 72 of the torsion bar 70 at their respective inner peripheral edges, and the outer peripheral edges of these external gears 8012 and 80b are fitted. is the electromagnetic pickup 5 [] in the above embodiment,
60 are facing each other.

Both external gears 8072. A locking mechanism 90 is provided between Bob, and this locking mechanism 90 connects both externally toothed wheels aoa.
, sob are constituted by a pair of cylindrical bodies 9192 extending along the outer periphery of the torsion bar 70 and facing each other in the axial direction.

At the tip of the cylinder 91, a pair of arm portions 91a, 91a are provided.
As shown in FIG. 6, these arm portions 91a, 91.2 are formed symmetrically with respect to the axis of the torsion bar 70.
A pair of arm portions 92a formed at the tip of the cylindrical body 92 are provided in between.
192a are loosely fitted. Each arm portion 9 of the cylindrical body 92? A pair of cushioning members 92b and 92'c made of rubber or the like, which constitute the main part of the present invention, are respectively fixed to the bidirectional radial side walls of Z. When the amount of torsion 9 of the torsion bar 70 is zero, Each radial side wall of each arm 91a and the buffer member 92b
(or 92C) is the maximum, and when the torsion bar 70 reaches the allowable twist amount, each arm portion 91
The radial side wall of a and the buffer member 92b (or 92C) are engaged.

In this embodiment configured as above, both external gears 8
When the phase difference between 0a and sob increases according to the load, the amount of twist of the torsion bar 70 increases accordingly, and each buffer member 92b (or 92c) gradually approaches one radial side wall of each arm 9112. do. When the phase difference reaches a value corresponding to the allowable twist amount of the torsion bar 70,
Each arm portion 9212 engages with each arm portion 91a via each buffer member 92b (or 92c). In this case, the impact sound that is expected to occur during the locking is largely absorbed by each buffer member 92b (or 92c), and therefore unnecessary noise is generated from the locking mechanism 90. can be reduced. Moreover, the above-mentioned retention degree is different from each buffer member 92b (or 92c)
Since the tension is relaxed, the locking mechanism 90 is not damaged.

In the first (or second) embodiment, an example was described in which both the buffer members 41a', 42a (or 92b, 92C) were fixed to both the protrusions 41, 42 (or both arms 92a, 92a). However, instead of this, for example, both buffer members 41, 42a (or 92b).

92C) on both sides of the tip of the protrusion 46 (or both arms 91a).

9112).

Furthermore, in carrying out the present invention, any detection means can be used, without being limited to the torque sensor S (or Sl), as long as it detects torque based on the phase difference between a pair of rotating bodies. Examples applying the invention

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the torque sensor, and FIG.
The figure is a partially enlarged cutaway view of the torque sensor, and Figure 6 is the first
A waveform diagram showing the phase difference with the fly wheeled rotating body in the figure, FIG. 4 is a graph showing the relationship between the phase difference and torque,
FIG. 5 is a sectional view showing another embodiment of the torque sensor, and FIG. 6 is a sectional view taken along line A-A in FIG. 5. Explanation of symbols 10...Flywheel, 1oa...Output shaft, 16
a... Input shaft, 2o... Rotating body, 6o... Leaf spring, 40.90... Holding mechanism, 41-46... Protrusion,
41iz, 42i2, 92b, 92c...-Buffer SU,
70...Toseen/<-180a, 80b・
...External gear, 91, 92...Cylinder, 91a, 91
b... Arm m, S-S t... Torque sensor. Applicant Japan Auto Parts Research Institute Co., Ltd. (and 1 others)
Name) Agent Patent Attorney Teru Hase - Figure 5 Figure 6

Claims (1)

[Claims] a first rotary body provided on a vehicle prime mover side output shaft so as to rotate integrally therewith; and a load side input shaft disposed coaxially with the output shaft so as to rotate integrally therewith. a second rotating body provided to face the rotating body; an elastic member connected between both the rotating bodies and elastically deformed in response to a load applied to the input shaft when the output shaft rotates; and the first rotating body. When the phase difference between the locked member protruding from the rotating body and the second rotating body projecting from the second rotating body is smaller than the allowable phase difference corresponding to the allowable amount of elastic deformation of the elastic member, the locked member a locking mechanism having a locking member located apart from the member and engaging the locked member when the phase difference reaches the allowable phase difference, detecting the phase difference; In the torsion detecting device, the torsion signal is generated as a torsion signal representing the torsion corresponding to the amount of elastic deformation of the elastic member. A torque detection device for a vehicle, characterized in that it is provided with a.