JP4911655B2 - Fluid transmission device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
According to the present invention, in order to balance the fluid transmission device, particularly the clutch provided in the fluid transmission device, the mounting position and size of the balance piece can be freely selected, and the balance piece can be stably mounted without rattling. The present invention relates to a fluid transmission device that can be used.
[0002]
[Prior art]
As is well known, a torque converter, which is one of fluid transmission devices, is a type of joint that can transmit engine power to a transmission using working fluid as a medium. A pump impeller that is turned by the engine, and the pump impeller A turbine runner that rotates in response to the movement of the working fluid sent out by rotation, and a stator that changes the direction of the working fluid from the turbine runner and guides it to the pump impeller.
[0003]
Therefore, a plurality of blades are arranged at predetermined intervals at a predetermined angle on the pump impeller, turbine runner, and stator. The working fluid sealed in the torque converter is sent from the pump impeller through the blades in the outer circumferential direction, travels along the inner wall of the case of the torque converter, hits the blade of the turbine runner, and the turbine runner is the same as the pump impeller. It works to turn in the direction. Further, the working fluid sent out after hitting the turbine runner is changed in the flow direction so as to hit the blades of the stator and promote the rotation of the pump impeller, and flows into the pump impeller again from the inner periphery.
[0004]
FIG. 3 shows a cross section of a conventional torque converter. In the figure, (a) shows a pump impeller, (b) shows a turbine runner, (c) shows a stator, and (d) shows a clutch, which are housed in a torque converter outer shell (e). Therefore, the front cover (f) rotates with the power from the engine, and the pump impeller (a) integrated with the front cover (f) rotates.As a result, the turbine runner (rotor) is mediated by the working fluid. ) Turns.
[0005]
A shaft (not shown) is fitted into the hub (g) of the turbine runner (b), and the rotation of the turbine runner (b) can be transmitted to a transmission (not shown). Since the torque converter is a kind of fluid clutch, when the rotation speed of the pump impeller (a) is low, the rotation of the turbine runner (ro) can be stopped (the car can be stopped), but the pump As the rotational speed of the impeller (b) increases, the turbine runner (b) starts to rotate, and as the speed further increases, the speed of the turbine runner (b) approaches the rotational speed of the pump impeller (b). However, in the torque converter using the working fluid as a medium, the rotational speed of the turbine runner (b) cannot be the same as that of the pump impeller (b).
[0006]
Therefore, as shown in the figure, a clutch (d) is provided in the torque converter outer shell (e), and when the rotational speed of the turbine runner (b) exceeds a predetermined region, The clutch (d) can be operated to move in the axial direction and engage with the front cover (f). Since a friction material (h) is attached to the outer periphery of the clutch, the clutch (d) can rotate at the same speed as the front cover (f) without slipping. The clutch (d) is connected to the turbine runner (b), and the turbine runner (b) is rotated by the clutch (d), and the power from the engine is lost to the transmission through the fluid. Can be transmitted with high efficiency of almost 100%.
[0007]
In this way, when the rotational speed of the turbine runner (b) increases and a certain condition is met, the clutch (d) engages with the front cover (f) and the turbine runner ( B) can be directly rotated. However, before the engagement, the rotational speeds of the turbine runner (b) and front cover (f) are not completely the same, and the clutch (d) is engaged with the front cover (f), so that an impact based on the speed difference occurs. appear. Damper springs (re), (re), etc. are provided between the clutch (d) and the turbine runner (b) in order to mitigate this impact during engagement and, on the other hand, not transmit engine torque fluctuations after engagement. The provided lockup damper (nu) is attached.
[0008]
Therefore, when the clutch (d) rotating at the same speed as the turbine runner (b) is engaged with the slightly faster front cover (f), the speed of the clutch (d) increases momentarily and the turbine runner ( (B) Torque to rotate faster is applied. The damper springs (re), (re), etc. are configured to absorb and compress this shocking torque. The clutch (d) is coaxially mounted on the hub (g) of the turbine runner (b), but the phase difference between the clutch runner (b) and the turbine runner (b) is caused by the compression deformation of the damper springs (re), (re). It has a structure that can produce.
[0009]
FIG. 4 is a cross-sectional view and a front view of a conventional clutch (d) having damper springs (re), (re), and the clutch (d) includes four damper plates (le) and (e). .. Are fixed, and the damper springs (re), (re),... Are provided on the damper plates (le), (e),. By the way, since the clutch (d) is provided with the damper plates (le), (e), and the damper springs (re) as described above, the mass balance with respect to the center is not perfect. For this purpose, balance pieces (wa) and (wa) must be installed.
[0010]
If the clutch (d) in an unbalanced state rotates at a high speed, a humming noise or sometimes vibration occurs. Therefore, concave spaces (f), (f) ... are formed at equal intervals on the inside of the damper plates (le), (e) ... fixed to the clutch (d), and the concave spaces (f), ( F) A balance piece (wa) is fitted and fixed at an appropriate position in order to balance the clutch (d).
[0011]
FIG. 5 shows a case where the balance piece (wa) is fixed in a concave space (f). Claws (yo) and (yo) protrude on both sides of this concave space (f), and if the balance piece (wa) is crimped into the concave space (f), the claw (yo) and (yo) It will be locked to and will not come off. The balance piece (wa) has a shape in which a cylinder with a reduced outer diameter is erected on an outer diameter disk that fits into a concave space (f), and the chain line portion in FIG. As a result, the cylindrical portion expands to both sides and is locked to both claws (yo) and (yo).
[0012]
However, even if the cylinder is crushed by caulking, if a gap is left between the claws (yo) and (yo), the balance piece (wa) will be loose, and vibration and noise will occur as the clutch (d) rotates. appear. On the other hand, as shown in FIG. 4, if the clutch (d) is provided with damper springs (re), (re) ... on the outer periphery, a concave space (on the inner peripheral side of the damper plates (le), (e) ( Can be formed, but the above-mentioned concave spaces (f), (f) cannot be formed in a clutch of the type in which a damper spring is also provided on the inner side. It is impossible to mount the balance piece (wa) by a simple method.
[0013]
[Problems to be solved by the invention]
As described above, the conventional torque piece clutch balance piece mounting structure has the above-described problems, and the same problem arises in the case of fluid coupling. The problems to be solved by the present invention are these problems. Even in the case of a clutch in which the shape of the damper plate cannot be opened to the inner peripheral side, the balance piece can be easily attached. Provided is a fluid transmission device that is free from rattling.
[0014]
[Means for solving the problems]
A damper plate is attached to the clutch for a fluid transmission device according to the present invention, and a balance piece is attached to the damper plate, but it does not have a concave space opened on the inner peripheral side as in the prior art, and from the center. A hole can be provided at a predetermined distance, and a balance piece can be fitted into the hole for crimping. A plurality of holes are provided at equal intervals, and are fitted into appropriate holes.
[0015]
Here, the specific form of the balance piece is not limited, but it can be fitted into the hole, and can be crushed and not removed by caulking. By the way, the part of the hole formed in the damper plate has a convex part having a larger outer diameter around the hole, and a space is formed between the part and the clutch. Therefore, a part of the balance piece fitted in the hole enters the space, and if it is caulked in this state, it is crushed and attached so as to sandwich the convex portion of the damper plate. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.
[0016]
【Example】
FIG. 1 shows a front view and a sectional view of a clutch to which a balance piece is attached. The clutch 1 forms a disk having a shaft hole 2 in the center, and four damper plates 3, 3... Having the same shape are attached to the clutch 1 by caulking pins 4, 4,. The damper springs 6, 6 ... are fitted into the grooves 5, 5 ... formed on the outer periphery of the damper plates 3, 3 ..., and the grooves 7, 7 ... formed on the inner peripheral side of the damper plates 3, 3 ... are short. Damper springs 8, 8... Are fitted and attached.
[0017]
By the way, the damper plate 3 is provided with holes 9, 9,... On a predetermined radius centered on the shaft hole 2, and the convex portions 10, 10,. Is formed. The balance piece 11 is attached to the convex portion 10 having the hole 9 and cannot be removed by caulking. In the figure, one balance piece 11 is attached, but a plurality of balance pieces 11 are attached as necessary. As with the balance adjustment of the tire, the unbalance amount and its position can be known by rotating at high speed.
[0018]
FIG. 2 shows a specific shape of the balance piece 11 and a state in which the balance piece 11 is attached to the damper plate 3. The balance piece 11a of (a) is a kind of rivet composed of a head portion 12a and a shaft portion 13a. The shaft portion 13a is fitted into a hole 9 provided in the damper plate 3, and a hole 14a having an open end is formed in the shaft portion 13a. Forming. And the circumference | surroundings of the hole 9 in which the balance piece 11a is attached comprise the convex part 10, and the space 15 is formed between the clutches 1. FIG.
[0019]
Therefore, a part of the shaft portion 13a fitted in the hole 9 enters the space 15, and if the head portion 12a is pressed with a caulking pin in this state, the shaft portion 13a is crushed and spreads into the space 15, and the convex portion 10 of the damper plate 3 Is inserted. In this case, it is easy to crimp by providing the hole 14a in the shaft portion 13a, and the shaft portion 13a spreads outward and is fixed without leaving a gap with the hole 9.
[0020]
The balance piece 11b shown in (b) similarly comprises a head portion 12b and a shaft portion 13b. The shaft portion 13b is provided with a hole 14b, and the head portion 12b is also formed with a hole 16b. Communicate. If the shaft portion 13b is inserted into the hole 9 and the caulking pin is fitted into the hole 16b to be caulked, the shaft portion 13b is crushed and enlarged and fixed in the space 15.
[0021]
The balance piece 11c shown in (c) includes a head portion 12c and a shaft portion 13c. The shaft portion 13c is provided with a hole 14c, and the head portion 12c is also formed with a hole 16c. When the shaft portion 13c is inserted into the hole 9 and the caulking pin is fitted into the hole 16c and caulked, the shaft portion 13c is crushed and enlarged and fixed in the space 15.
[0022]
The balance piece 11d shown in (d) includes a head portion 12d and a shaft portion 13d. The shaft portion 13d has a hole 14d, and the head portion 12d also has a hole 16d. If the shaft portion 13d is inserted into the hole 9 and the caulking pin is fitted into the hole 16d to be caulked, the shaft portion 13d is crushed and enlarged and fixed in the space 15.
[0023]
As described above, the balance piece mounting structure of the fluid transmission device according to the present invention has a hole formed in the damper plate and a convex portion formed around the hole, and the shaft portion of the balance piece is fitted into the hole. The following effects can be obtained.
[0024]
【Effect of the invention】
The balance piece of the fluid transmission device according to the present invention is a kind of rivet, and since the shaft portion is fitted into the hole formed in the damper plate and crimped, the crimped balance piece does not come off the hole. That is, a convex part is formed around the hole, and the shaft part fitted in the hole is caulked so that it does not spread out to the surrounding convex part space, and there is no gap between the hole and the balance piece. There is no backlash.
[0025]
In the present invention, since the hole is provided together with the convex portion on the predetermined radius from the center of the damper plate, the balance piece can be fitted and crimped from the axial direction of the clutch. Therefore, even if the clutch is provided with another damper spring on the inner periphery side of the balance piece, the balance piece can be attached without any problem as long as it is the attachment structure of the present invention.
[Brief description of the drawings]
FIG. 1 is a clutch provided with a balance piece mounting structure of the present invention.
FIG. 2 is a specific example of a balance piece mounting structure according to the present invention.
FIG. 3 is a cross-sectional view of a torque converter.
FIG. 4 shows a clutch having a conventional balance piece mounting structure.
FIG. 5 shows a conventional balance piece mounting structure.
[Explanation of symbols]
1 Clutch 2 Shaft hole 3 Damper plate 4 Caulking pin 5 Groove 6 Coil spring 7 Groove 8 Coil spring 9 Hole
10 Convex
11 Balance piece
12 heads
13 Shaft
14 holes
15 space
16 holes

Claims (2)

In the fluid transmission device having a clutch housed in the fluid transmission device and elastically connecting the turbine runner and the front cover, a damper plate is fixed to the clutch, and the damper plate is connected to the center of the fluid transmission device. A hole is provided at a predetermined distance, and a convex part having an outer diameter slightly larger than the hole is formed around the hole, and a space communicating with the hole is formed between the convex part and the clutch, A shaft part of a balance piece consisting of a shaft part having a hole and a head part having an outer diameter larger than the inner diameter of the hole is fitted into the space from the hole to press the head part located above the convex part, and characterized in that the said space while expanding around a shaft portion collapses which fits in the space between the clutch leaving a gap, and fixed by further eliminating the gap between the hole of the convex portion by the collapse of the shaft portion Fluid transmission device   The fluid transmission device according to claim 1, wherein a hole for fitting a caulking pin is formed in the head.

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