JPH01238754A - Hammering sound preventive structure for belt type automatic speed change gear - Google Patents

Abstract

PURPOSE:To prevent generation of hammering sound caused by torque variation by interposing a small slide piece in a guide part and a column body and forming an elastic body for pressing the slide piece to the guide body and/or column body. CONSTITUTION:As a slide piece 24 is inserted into a column body 11 in such a state that the slide piece 24 is inserted into a guide body 20, the tip of the outside surface of an elastic intermediate body 33 is pushed onto the inside surface of the guide part 20 so as to be elastically deformed. In compliance with the above elastic deformation, an elastic side edge piece 34 on the end part from a slit 32 is elastically deformed inwardly so as to bring the tip of the inside surface of the elastic side edge piece 34 in press-contact with the outer surface of the column body 11. Thus, since the slide piece 24 is rigidly inserted in the column body 11 and flange part 29, even if accelerating or decelerating force is applied on the drive inner cylinder, it is possible to prevent a drive torque pressure receiving side part 26 and braking torque pressure receiving part 27 from the application of any impact force, thus preventing generation of hammering sound.

Description

Detailed Description of the Invention The present invention provides a belt-type automatic transmission in which the gear ratio can be adjusted steplessly in response to changes in the rotational speed of the drive shaft. The present invention relates to a hammering sound prevention structure that can accurately follow changes in the rotational speed of a shaft and can also prevent hammering sounds even when torque fluctuates.

-And the problem to be solved- In the conventional Bell 1-type automatic transmission, the centrifugal force acting on the centrifugal weight moves the movable pulley half so that the distance between the fixed pulley half and the movable pulley half can be adjusted. In order to move the side pulley half slidably in the axial direction and also transmit one helix of the drive shaft to the moving side pulley half, Japanese Utility Model Application Publication No. 54-124877 (see Fig. 10) was used.
As shown in the figure, a spider 01 serving as a receiving member is integrally attached to the drive shaft, and a rib 04 that clamps the spike 01 via a locking pawl 03 is integrally provided on the moving side boob half 02. Ta.

In the conventional bell 1-type automatic transmission shown in FIG.
In order to allow the spider 01 to smoothly slide relative to the locking claw 03 in the axial direction, it is necessary to make the interval between the inner surfaces of the re-inspection claw 03 slightly wider than the width of the spider 01. There was a gap between the spider 01 and the locking pawl 03, and when the drive shaft fluctuated by 1-lux, the side surface of the spider 01 would collide with the inner surface of the locking pawl 03, making it inevitable that a strike B would occur. .

In addition, in order to prevent this meeting,
As shown in Publication No. 78 (see FIGS. 11 and 12), a rubber-like elastic body 0! is placed on the outside of the locking claw 03. ) In the conventional Bell 1-type automatic transmission illustrated in FIG. As a result, the movable boom half 02 may not be able to slide smoothly in the axial direction, making it difficult to fully achieve the intended purpose of changing gears at a gear ratio that corresponds to the rotational speed of the drive shaft. I can't stand it.

Oh! to decide 2! jALfUThe present invention relates to an improvement of a belt-type automatic transmission that overcomes such difficulties, and includes a drive that is movable in the axial direction and can substantially vary the diameter of the pulley. A pulley half body, a pulley boss, and a movable pulley body are arranged facing each other so as to be able to freely slide on the boss in the direction of the shaft knob, and a centrifugal way is disposed on the back side of the movable pulley half body. Then, a receiving member that receives the centrifugal force of the centrifugal weight and defines the axial position of the moving side boob is placed on the back side of the moving pulley half and the centrifugal weight is placed on the drive shaft on the opposite side with lυ. A striking body extending in the axial direction is integrally formed with the movable pulley half body, and is fitted into the movable pulley half body to slide the movable pulley half body in the direction of the shaft protrusion and is applied to the drive shaft. In a belt type automatic transmission system in which the receiving member is provided with a guide portion that transmits torque to the movable pulley member, a slide piece having a small friction coefficient is interposed between the guide portion and the column body, and the slide The present invention is characterized in that an elastic piece is formed to bring the piece into pressure contact with either or both of the guide portion and the column.

Since the present invention is configured as described above, the two front movable pulley halves can smoothly slide toward the shaft arm while the slide piece is in contact with the guide portion and the pillar body without any play. Can be done.

Support 1 An embodiment of the present invention illustrated in FIGS. 1 to 7 will be described below.

First, on the drive side, the left tips of the crank shirts 1 and 2 of the engine 1 are formed into a tapered surface, and the drive inner cylinder 4 of the drive V pulley 3 is fitted into the crank shut 2, and the drive inner cylinder 4 is inserted through the drive inner cylinder 4 to drive the crank. The drive inner cylinder 4 is integrally connected to the crankshaft 2 by a pin 1-5 screwed onto the shaft 2. The grease reservoir 6 is for supplying grease to the sliding surface between the drive inner cylinder 4 and the movable pulley half 9 through the grease supply hole 7.

Further, a stationary pulley half 8 is integrally fitted to the right end of the drive inner cylinder 4, and a movable pulley half 9 is attached to the drive inner cylinder 4 via a seal 10 so as to be able to move toward or away from the fixed pulley half 8. The movable pulley half 9 is fitted so as to be slidable in the direction.
On the left side of the shaft, three pillar bodies 11 are integrally provided to protrude in the axial direction at equal intervals in the circumferential direction.

Further, three pairs of bearing portions 12 are integrally protruded from the left side of the movable pulley half 9 and are located in the middle of the arrangement interval of the column bodies 11.
The pivot shafts 14 of the centrifugal ways 1 to 13 are fitted into this bearing portion 12, and a presser plate 15 is applied to the pivot shaft 14, and the presser plate 15 is integrated with the movable pulley half 9 with bolts 16. is fixed to.

Further, a spider 17, which is a receiving member located on the left side of the moving side boob half body 9, is integrated into the drive inner cylinder 4 with a washer 22 and a nut 23 screwed onto the left end of the drive inner cylinder 4. The spider 17 is fitted with three centrifugal weight receivers 18 integrated in the circumferential direction to move the movable pulley half 9 in the axial direction in response to the centrifugal force of the centrifugal ways 1 to 13 in contact with the centrifugal weights 13. An arm 19 is located in the middle of the centrifugal weight receiving part 18 and extends in the radial direction, and a channel-shaped guide part 20 is formed at the tip of the arm 19, and this guide part 20 has a self-lubricating mechanism. A slide piece 24 made of a resin such as nylon, which has high elasticity, is fitted. (Hertz is dry 1
Not only is the transmission transmitted to the stationary pulley half 8 via the inner cylinder 4, but also the transmission is transmitted from the arm 19 of the spider 17 to the guide portion 20.
Slide piece 24. It is also transmitted to the movable pulley half 9 via the column 11.

Moreover, the slide piece 24 is located at the bottom 25. Drive torque pressure receiving side part 26. The braking torque receiving side part 27 is formed into a channel shape, and flanges 28 and 29 are integrally formed at the inner and outer ends thereof, and the bottom part 25 is adjacent to the inside of the flanges 28 and 29.
．． Drive torque pressure receiving side part 26. A groove 30.31 is provided in the braking torque pressure receiving side 27, and two slits 32 are cut in the braking torque pressure receiving side 27 in parallel with the groove 30.31.

In the slide piece 24, as shown in FIG.
The inner and outer surfaces of the pressure-receiving side portion 27 are formed at angles α and β that are the same as the angle of inclination α of both side surfaces of the columnar body 11 having a ladder-like cross-section and the angle of inclination β of the inner surface of the guide portion 20, respectively. , drive torque pressure receiving side portion 26. The dimension between the opposing inner surfaces of the brake 1 to the torque receiving side 27 is set to be slightly smaller than the cross-sectional shape of the column 11, and the dimension between the opposing inner surfaces of the brake 1 to the torque receiving side 27 is set to be slightly smaller than the cross-sectional shape of the column 11. The dimension between the outer surfaces of the braking torque receiving side portion 27 is set to be the same as or slightly smaller than the transverse shape between the inner surfaces of both side portions of the guide portion 20 .

Then, the angle of inclination of the outer surface of the elastic intermediate piece 33 sandwiched between the slits 32 in the braking torque receiving side portion 27 is set such that the inclination angle [゛] is slightly larger than the inclination angle β of the inner surface of the guide portion 20.
The elastic intermediate piece 33 is curved outward.

In addition, a cover 35 is attached to the left end of the movable pulley half 9 with several bolts 3G, and the cover 35 and the spider 17
A compression coil spring 37 is interposed between the two, and when no centrifugal force is applied to the centrifugal weight 13, the movable pulley half 9 is fixed by the spring force of the compression coil spring 37, as shown in FIG. It moves to the left so as to be separated from the side pulley half 8, and the radius of the winding of the drive V pulley 3 becomes smaller.

Next, the driven side will be explained.

There is a power transmission part to the rear wheel system (not shown) at the right end of the driven shaft 40 , and the driven inner cylinder 42 of the driven shaft 41 is spline-fitted to the left end of the driven shaft 40 , and passes through the washer 43 to transmit the driven shaft 4 .
A to 0! Driven inner cylinder 42 with attached bolt 44
is integrally coupled to the driven shaft 40.

Further, a stationary pulley half 47 is integrally fitted to the left side of the driven inner cylinder 42 via a flange 45, and four sleeves of a movable pulley half 48 are positioned to the right of the driven inner cylinder 42. A guide pin 51 is fitted into the driven inner cylinder 42 through a guide elongated hole 50 oriented in the axial direction of the sleeve 49, and a guide roller 52 is rotatably fitted into the guide pin 51. = 8 - A spring receiving sleeve 53 is fitted around the outer periphery of the one tube 49, and the moving side boob half 48 is guided by the guide elongated hole 50 so that it can slide in the axial direction.

Further, a spring receiving plate 54 is fitted to the right end of the driven inner cylinder 42 and locked with a circlip 55, and a compression coil spring 56 is interposed between the spring receiving sleeve 53 and the spring receiving plate 54, and the compression coil spring 56 is interposed between the spring receiving sleeve 53 and the spring receiving plate 54. The movable pulley half 48 is urged to approach the stationary pulley half 47 by the spring force 56 .

The flange 45 is provided with a screw hole 46, and a bolt (not shown) is screwed into the screw hole 46 so that its tip abuts against the left end surface of the sleeve 49. overcoming the spring force of the movable half-boot 48 from the stationary pulley half 47, the drive pulley 3. The V bells 1 to 38 between the driven pulleys 41 can be easily attached and detached.

Since the embodiment shown in FIGS. 1 to 7 is configured as described above, when the engine 1 is stopped, no centrifugal force is generated in the centrifugal weight 13, and the embodiment shown in FIG. As shown in FIG. It is wound around the drive inner cylinder 4 without being pressed against the nose surface of the movable half-boot 9, so that the output of the engine 1 is not transmitted to the driven shaft 40.

Next, when engine 1 is put into operation and speeds up, the rotational torque of crank shutt 2 spikes at arm 1 of -17.
The signal is also transmitted to the movable pulley P unit 9 from the guide portion 20 at the tip of the movable pulley P through the slide piece 24 and the column 11, and the stationary pulley half 8 and the movable pulley half 9 are rotationally driven. Centrifugal force is generated in the weight 13, and the centrifugal weight 13 moves in the radial direction along the centrifugal weight receiving portion 18, and the movable boolean half 9 slides closer to the stationary pulley half 8. , drive (2) The radius of the V-belt 38 on the pulley 3 increases, and the radius of the driven shaft 41 decreases, so that the gear ratio automatically decreases.

When the rotational speed of the engine 1 increases or decreases, the drive torque receiving side portion 26 of the slide piece 24 . Braking] - The inner surface of the pressure-receiving side part 27 is in close contact with both sides of the column 11 without any gaps, and the slide piece 24 (which has excellent self-lubricating properties/V) is made of nylon, so it acts on the centrifugal weight 13. The movable pulley half 9 can slide in the axial direction without any IJ' in response to an increase or decrease in centrifugal force, and therefore the driven shirts 1 to 40 are rotationally driven at a gear ratio corresponding to the rotational speed of the engine 1.

Furthermore, since the slide piece 24 is configured as shown in FIG.
When the slide piece 24 is fitted to the column 11 in a state where it is fitted into the column 11, as shown in FIG.
The tip of the outer surface is pressed against the inner surface of the guide part 20 and elastically deforms inward, and correspondingly, the end part of the slit 32 also elastically deforms toward the inner side 1) and becomes elastic. Edge piece 3
4 is in close contact with the outer surface of the column 11, and the slide piece 24 is fitted to the column 11 and the flange 29 without play, so even if acceleration/deceleration force is applied to the drive inner cylinder 4, , drive 1~lux pressure receiving side part 26. Braking torque pressure receiving side part 2
No shocking force is applied to n8, and n8 is prevented from starting or stopping.

Furthermore, the drive inner cylinder 4° arm 19 is connected to the crankshaft 2. The driving torque is transmitted to the sliding body 11 via the guide portion 20o and the driving torque receiving side portion 26 of the slide piece 24, and the drive torque receiving side portion 26 is provided with a slit 32.
33, the driving torque receiving side 2G can bear a large driving torque, and the driving torque receiving side 26
is hard to wear and has high durability.

In the embodiment shown in FIGS. 1-7, the slit 32
The elastic intermediate piece 33, which is held between In this way, the pressure intermediate piece 33 on the inner side of the slit 32 is bent inward in the brake 1~luke receiving side part 27, and its inner surface is formed to be elastically brought into close contact with the side surface of the column body 11. You can.

Furthermore, the slide piece 24 may be formed as shown in FIG. 9, which is a combination of the embodiments shown in FIGS. 1 to 7 and the embodiment shown in FIG. 8.

In this way, in the present invention, a pillar body integral with the moving side boob half is attached to the guide portion of the receiving member integral with the drive shaft through the slide piece, and the pillar body is attached to the guide part of the receiving member integral with the drive shaft, and the pillar body is attached to the guide part of the receiving member integral with the drive shaft. Even if there are fluctuations in the torque applied to the drive shaft,
The generation of hitting sounds is prevented.

Further, in the present invention, since the pillar body of the movable pulley half is slidably fitted in the axial direction through the slide piece having a small coefficient of friction with the guide portion of the front support member, The movable boom half can be easily moved in the axial direction by the centrifugal force acting on the centrifugal weight, and the speed can be reliably changed to a gear ratio corresponding to the rotational speed of the drive shaft.

Furthermore, in the present invention, the slide piece has a small coefficient of friction and is not constantly subjected to large pressure, so it has little wear and high durability.

[Brief explanation of the drawing]

1 and 2 are longitudinal sectional side views illustrating an embodiment of the strike-8 prevention structure of the belt type automatic transmission according to the present invention, with FIG. 1 showing the stopped state and FIG. 2 showing the high speed rotation state. Figures 3 and 4 show the lines m-m and I in Figure 1, respectively.
FIG. 5 is a cross-sectional view cut along the line V-IV, FIG. 5 is an exploded perspective view of the main part thereof, and FIG. 6 is a slide showing the shapes of the column 11, guide portion 20, and slide piece 24 in the above embodiment. FIG. 7 is a cross-sectional view of the piece 24, and FIG. 7 is a cross-sectional view showing the slide piece 24 interposed between the column 11iB and the guide portion 20, and FIGS. 8 and 9 are perspective views of essential parts of other embodiments. Fig. 10 is a cutaway perspective view of the main parts of a conventional belt-type automatic transmission) * Fig. 11 is a cutaway perspective view of main parts of another conventional belt-type automatic speed changer. It is a longitudinal side view. 1...T engine, 2...crankshaft, 3...
・Drive inner cylinder, 4. Drive inner cylinder, 5. Bolt, 6. Grease reservoir, 7. Grease supply hole, 8.
... Fixed side pulley half, 9... Moving side pulley half, 1
0...Seal, 11--1 body, 12...Information Department, 1
3...Centrifugal weight, 14...Pivot shaft, 15...
Holding plate, 16... Bolt, 17... Spider one, 18
... Centrifugal weight receiver, 19... Arm, 2o.
...Guide part, 21...Key, 22...Mekin, 23
... Pututo, 24... Slide piece, 25...
Bottom, 26... Driving torque receiver side part, 27... Braking torque receiver side part, 28.29... Flange part, 30, 31... Groove part, 32... Slit, 33... Elastic middle Ha, 34
...Elastic side edge piece, 35...Cover, 3G...Bolt, 37...Compression coil spring, 38...■ Belt, 40...Driven shirt j~, 41...Driven V Pulley, 42... Driven inner cylinder, 43... Washer, 44... Bolt, 45... Flange, 46...
・Threaded hole, 47... Fixed side pulley half, 48... Moving side boolean half, 49... Sleeve, 50... Guide elongated hole, 51... Guide pin, 52... Guide roller, 53... Spring receiving sleeve, 54... Spring receiving plate, 55... Circlip, 56... Compression coil spring.

Claims (1)

[Claims] A fixed pulley half and a pulley boss that are integral with the drive shaft of a drive V pulley that is movable in the axial direction and can substantially vary the diameter of the pulley, and a movable pulley half that is slidable in the axial direction on the boss. are disposed facing each other, a centrifugal weight is arranged on the back side of the movable pulley half, and the receiving member that receives the centrifugal force of the centrifugal weight and defines the axial position of the movable pulley is moved. A column body extending in the axial direction is integrally provided on the drive shaft on the back side of the pulley half body and the opposite side of the centrifugal weight, and a column body extending in the axial direction is formed integrally with the movable pulley half body, and is fitted into the column body. In the belt type automatic transmission, the receiving member is provided with a guide portion that slides the moving pulley half in the axial direction and transmits torque applied to the drive shaft to the moving pulley half, the guide portion A belt-type automatic transmission characterized in that a slide piece having a small friction coefficient is interposed between the column and the column, and an elastic piece is formed to press the slide piece against either or both of the guide portion and the column. Noise prevention structure.