JP2017172716A - Damper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a damper device of light weight, reduced in the number of components, and having a good characteristic.SOLUTION: A spiral spring 21 is formed into the spiral shape wound along a fiber direction while using a carbon fiber-reinforced plastic as a material, an inner peripheral end of the spiral spring 21 is connected to a crank shaft 1 of an engine through an inner holder 22 (input element), and an outer peripheral end of the spiral spring 21 is connected to a front cover 31 (set block 60) through an outer holder 24 (output element). Further the spiral spring 21 is attached so that its winding direction is agreed with a rotating direction of the engine. Thus a large torsion angle can be obtained while securing high strength by utilizing low rigidity and high tensile strength of the carbon fiber-reinforced plastic.SELECTED DRAWING: Figure 1

Description

  The invention of the present disclosure disclosed in the present specification relates to a damper device.

  Conventionally, as this kind of damper device, one provided with a steel spiral spring has been proposed (see, for example, Patent Document 1). Steel spiral springs have high rigidity and reach a tolerance value of fatigue strength before a necessary twist angle is obtained. For this reason, in the conventional damper device, in order to obtain a sufficient torsion angle, in addition to the first spiral spring and the second spiral spring, a plate spring having higher rigidity than the first spiral spring and the second spiral spring is used in combination. Yes.

JP 2006-292126 A

  However, using a plurality of types of springs together to obtain a sufficient torsion angle increases the number of parts and hinders downsizing.

  The main object of the present disclosure is to provide a damper device that has a small number of parts, is lightweight, and has good characteristics.

  The invention of the present disclosure has taken the following means in order to achieve the main object described above.

The damper device of the present disclosure is:
A damper device having an input element to which torque is transmitted from an engine and an output element,
A spiral spring formed by a fiber-based composite material in a spiral shape along the fiber direction, with an inner peripheral end attached to one of the input element and the output element, and an outer peripheral end attached to the other of the input element and the output element Comprising a member,
The gist of the spiral spring member is such that the rotational direction of the engine is the winding direction.

  In the damper device of the present disclosure, the spiral spring member is formed in a spiral shape along the fiber direction by the fiber-based composite material. Further, the spiral spring member is attached so that the rotation direction of the engine is the winding direction, that is, the spiral spring member is pulled by the engine torque. Thereby, the spiral spring member can obtain a large torsion angle while ensuring high strength by utilizing the low rigidity and excellent tensile strength of the fiber-based composite material. Therefore, by configuring a damper device using such a spiral spring member, it is possible to provide a damper device that has a small number of parts, is lightweight, and has good characteristics. Here, the “winding direction” can also be referred to as a direction in which the spiral interval of the spiral spring member is narrowed.

It is a block diagram which shows the outline of a structure of the start apparatus 10 which has the damper apparatus 20 which concerns on this embodiment. It is an external view which shows the external appearance which looked at the damper apparatus 20 from the front (axial direction). FIG. 3 is an explanatory diagram showing torque flows of a damper device 20 and a torque converter 30.

  Next, embodiments for carrying out the invention of the present disclosure will be described with reference to the drawings.

  FIG. 1 is a configuration diagram showing an outline of the configuration of a starting device 10 having a damper device 20 according to the present embodiment, and FIG. 2 is an external view showing an appearance of the damper device 20 viewed from the front (axial direction). is there. The starting device 10 is mounted on a vehicle including an engine, and includes a damper device 20 and a torque converter 30.

  The torque converter 30 includes a front cover 31, a pump impeller 40 fixed to the front cover 31 by welding, a turbine runner 42 fixed to the turbine hub 36 by rivets and rotatable coaxially with the pump impeller 40, A lockup clutch 50 that connects the turbine hub 36 and releases the connection between the two. The turbine hub 36 is spline-fitted to an input shaft IS of a transmission such as an automatic transmission (AT) or a continuously variable transmission (CVT) (not shown).

  The front cover 31 includes a center piece 32, a side wall 34 a that is fixed to the center piece 32 by welding and extends radially outward, and an outer cylinder that extends in the axial direction of the torque converter 30 from the outer peripheral edge of the side wall 34 a. A cover body 34 having a portion 34b. A set block 60 is fixed to the outer peripheral portion of the side wall portion 34a of the cover main body 34 by welding.

  The pump impeller 40 and the turbine runner 42 face each other, and a stator 44 that can rotate coaxially with the pump impeller 40 and the turbine runner 42 is disposed between the pump impeller 40 and the turbine runner 42. The pump impeller 40, the turbine runner 42, and the stator 44 form a torus (annular flow path) that circulates hydraulic oil. The torque converter 30 may be a simple fluid coupling that does not include the stator 44.

  As shown in FIG. 1, the damper device 20 is a torsion element connected to the crankshaft 1 of the engine and the front cover 31 of the torque converter 30. The damper device 20 has a spiral spring 21 wound in a spiral shape, and is fixed to the crankshaft 1 of the engine in the axial direction by a bolt 25 and the inner peripheral end of the spiral spring 21 is fastened in a radial direction by a rivet 26. The nut 27 is screwed onto the inner holder 22 (input element) and the threaded portion 60a formed on the set block 60 to fix it in the axial direction, and the outer peripheral end of the spiral spring 21 is fastened to the radial direction by the rivet 28. Outer holder 24 (output element). A fastening portion 24a between the outer holder 24 and the set block 60 by the nut 27 is formed so as to be recessed toward the front cover 31 in the axial direction. Thereby, even if the spiral space | interval of the spiral spring 21 changes, the spiral spring 21 does not contact the fastening part 24a.

  The spiral spring 21 is a spring wound along the fiber direction with carbon fiber reinforced plastic (CFRP). Here, the carbon fiber reinforced plastic is a fiber reinforced plastic using carbon fiber as a reinforcing material, and a thermosetting resin such as an epoxy resin is used as a base material. A fiber reinforced plastic made of a combination of such a fiber and a resin has a characteristic that the strength in the compression direction is low, but the strength in the tensile direction is high. In the present embodiment, the spiral spring 21 is adjusted so that the rotational direction of the engine (solid arrow in FIG. 2) coincides with the winding direction (direction in which the spiral interval becomes narrow), that is, the spiral spring 21 is pulled by the engine torque. It was supposed to be attached. Thereby, the spiral spring 21 can obtain a large torsion angle while ensuring high strength by utilizing the low rigidity and excellent tensile strength of the carbon fiber reinforced plastic. In addition, since the spiral spring 21 is made of carbon fiber reinforced plastic, it is extremely light compared to a metal (steel) one. By configuring the damper device 20 with such a spiral spring 21, a damper is formed. The weight of the device 20 can be reduced.

  The spiral spring 21 has an inner peripheral end fastened to the crankshaft 1 of the engine via an inner holder 22, and an outer peripheral end fastened to the set block 60 fixed to the front cover 31 via an outer holder 24. That is, the spiral spring 21 is disposed outside the torque converter 30. As described above, since the spiral spring 21 contains resin as a base material, if the spiral spring 21 is accommodated in the torque converter 30 and exposed to hydraulic oil, it may cause deterioration due to oil or heat. In the present embodiment, the spiral spring 21 is disposed outside the torque converter 30, thereby preventing such deterioration.

  FIG. 3 is an explanatory diagram showing the flow of torque in the damper device 20 and the torque converter 30. The spiral spring 21 is interposed between the engine crankshaft 1 and the front cover 31 of the torque converter 30. As shown in FIG. 3A, when the lockup clutch 50 is released (lockup off), the torque from the engine is the torus of the damper device 20 (the spiral spring 21) and the torque converter 30. Are sequentially transmitted to the input shaft IS of the transmission. As shown in FIG. 3B, when the lock-up clutch 50 is engaged (lock-up on), the torque from the engine is generated by the damper device 20 (the spiral spring 21) and the lock-up clutch 50. Are sequentially transmitted to the input shaft IS of the transmission.

  According to the damper device 20 of the present disclosure described above, the spiral spring 21 is formed in a spiral shape wound along the fiber direction using carbon fiber reinforced plastic as a material, and the inner peripheral end of the spiral spring 21 is connected to the inner holder 22 ( The outer peripheral end of the spiral spring 21 is connected to the front cover 31 (set block 60) via the outer holder 24 (output element). Further, the spiral spring 21 is attached so that the rotational direction of the engine and the winding direction coincide with each other. This makes it possible to obtain a large twist angle while securing high strength by utilizing the low rigidity and excellent tensile strength of the carbon fiber reinforced plastic. As a result, it is possible to provide a damper device having a small number of parts, light weight and good characteristics. Further, since the inner peripheral end and the outer peripheral end of the spiral spring 21 are fastened in the radial direction by the rivets 26 and 28 to the inner holder 22 and the outer holder 24, respectively, the spiral spring 21 can be fixed in a stable posture. .

  Further, according to the damper device 20 of the present disclosure, since the extremely lightweight carbon fiber reinforced plastic is used as the material of the spiral spring 21, the damper device 20 can be further reduced in weight.

  Furthermore, according to the damper device 20 of the present disclosure, since the spiral spring 21 is disposed outside the torque converter 30, the material (resin) of the spiral spring 21 is exposed to the hydraulic oil in the torque converter 30, and the spiral spring 21. Can be prevented from deteriorating.

  Further, according to the damper device 20 of the present disclosure, since the fastening portion 24a of the outer holder 24 with the set block 60 is recessed toward the front cover 31 in the axial direction, the spiral spring 21 is wound by the engine torque and the spiral interval is increased. Even if it becomes narrow, it can prevent that the spiral spring 21 contacts the fastening part 24a.

  In the damper device 20 of the present disclosure, the inner peripheral end of the spiral spring 21 is connected to the crankshaft 1 of the engine, and the outer peripheral end of the spiral spring 21 is connected to the front cover 31 (set block 60). 21 may be connected to the front cover 31 and the outer peripheral end of the spiral spring 21 may be connected to the crankshaft 1 of the engine. In this case, for example, the set block is fixed to the inner peripheral portion of the side wall portion 34a of the front cover 31, and the inner peripheral end of the spiral spring 21 is fixed to the fixed set block via the inner holder, and is annularly connected to the crankshaft 1 of the engine. The outer peripheral end of the spiral spring 21 may be fixed to the fixed annular drive member via the outer holder.

  Although the damper device 20 of the present disclosure is configured to include one spiral spring 21, the damper device 20 may include two spiral springs in parallel. In this case, the two spiral springs may be connected to the crankshaft 1 of the engine and the front cover 31 of the torque converter 30 so that the spiral directions are opposite to each other.

  In the damper device 20 of the present disclosure, carbon fiber reinforced plastic is used as the material of the spiral spring 21, but the material is not limited to this, and other fiber reinforced plastics such as metal fiber reinforced plastic and glass fiber reinforced plastic are used. Plastic may be used.

  As described above, the damper device according to the present disclosure is a damper device (20) having an input element (22) to which torque is transmitted from an engine and an output element (24), and is made of fiber composite material. The inner peripheral end is attached to one of the input element (22) and the output element (24), and the outer peripheral end is formed of the input element (22) and the output element (24). A spiral spring member (21) attached to the other is provided, and the spiral spring member (21) is attached so that the rotational direction of the engine is the winding direction.

  In the damper device of the present disclosure, the spiral spring member (21) is formed in a spiral shape along the fiber direction by the fiber-based composite material. Further, the spiral spring member (21) is attached so that the spiral spring member (21) is pulled by the rotational direction of the engine in the direction in which the spiral spring member (21) is wound, that is, engine torque. Thereby, the spiral spring member (21) can obtain a large torsion angle while securing high strength by utilizing the low rigidity and excellent tensile strength of the fiber-based composite material. Therefore, by configuring the damper device using such a spiral spring member (21), it is possible to provide a damper device with a small number of parts, light weight and good characteristics.

  In such a damper device of the present disclosure, the fiber-based composite material may be a fiber-reinforced plastic. If it carries out like this, a damper apparatus provided with the spiral spring member of lighter weight and high intensity | strength can be provided. Examples of the fiber reinforced plastic include carbon fiber reinforced plastic, metal fiber reinforced plastic, and glass fiber reinforced plastic.

  In the damper device according to the present disclosure of this aspect, the damper device is mounted on a vehicle including a fluid transmission device (30) that transmits power by a fluid filled therein, and the spiral spring member is disposed outside the fluid transmission device (30). It can also be arranged. In this case, the material (resin) of the spiral spring member is not exposed to the fluid (hydraulic oil), and therefore the deterioration of the spiral spring member can be prevented.

  In the damper device of the present disclosure of this aspect, the outer peripheral end of the spiral spring member (21) is attached to the set block (60) fixed to the side wall of the cover (31) of the fluid transmission device (30). A first holding member (22), and a second holding member (24) fixed to the output shaft (1) of the engine and to which an inner peripheral end of the spiral spring member (21) is attached. 1 holding member (21) has a fastening part (24a) fastened to the set block (60) in the axial direction on the inner peripheral side of the outer peripheral end of the spiral spring member (21). The part (24a) may be formed so as to be recessed toward the side wall part in the axial direction. In this way, even if the spiral spring member is caught by the engine torque and the spiral interval becomes narrow, the spiral spring member can be prevented from coming into contact with the fastening portion.

  In the damper device according to the present disclosure including a fluid transmission device, the fluid transmission device (30) includes a pump impeller (40) and a turbine runner (42) that form a torus, and a lock-up clutch (50). And when the lockup clutch (50) is disengaged, the spiral spring member (21) receives power from the engine through the spiral spring member (21) and the torus in order. When transmitted to the rear shaft (IS) and the lockup clutch (50) is engaged, the power from the engine passes through the spiral spring member (21) and the lockup clutch (50) in this order. It can also be arranged to be transmitted to the rear shaft (IS).

  As mentioned above, although the embodiment of the invention of the present disclosure has been described, the invention of the present disclosure is not limited to such an embodiment and can be implemented in various forms without departing from the gist of the invention of the present disclosure. Of course you can.

  The invention of the present disclosure can be used in the damper device manufacturing industry.

  1 crankshaft, 10 starting device, 20 damper device, 21 spiral spring, 22 inner holder, 24 outer holder, 24a fastening portion, 25 bolt, 26 rivet, 27 nut, 28 rivet, 30 torque converter, 31 front cover, 32 centerpiece, 34 Cover body, 34a Side wall part, 34b Outer cylinder part, 36 Turbine hub, 40 Pump impeller, 42 Turbine runner, 44 Stator, 50 Lock-up clutch, 60 Set block, 60a Screw part.

Claims (5)

A damper device having an input element to which torque is transmitted from an engine and an output element,
A spiral spring formed by a fiber-based composite material in a spiral shape along the fiber direction, with an inner peripheral end attached to one of the input element and the output element, and an outer peripheral end attached to the other of the input element and the output element Comprising a member,
The said spiral spring member is attached so that the rotation direction of the said engine may turn into a winding direction. The damper device according to claim 1,
The fiber composite material is a fiber reinforced plastic. The damper device according to claim 2, wherein the damper device is mounted on a vehicle having a fluid transmission device that transmits power by a fluid filled therein.
The spiral spring member is disposed outside the fluid transmission device. The damper device according to claim 3,
A first holding member fastened to a set block fixed to a side wall portion of the cover of the fluid transmission device, to which an outer peripheral end of the spiral spring member is attached;
A second holding member fixed to the output shaft of the engine and to which an inner peripheral end of the spiral spring member is attached;
With
The first holding member has a fastening portion that is fastened in the axial direction with respect to the set block on the inner peripheral side of the outer peripheral end of the spiral spring member,
The said fastening part is formed so that it may become depressed in the said side wall part side of an axial direction. The damper device according to claim 3 or 4, wherein
The fluid transmission device includes a pump impeller and a turbine runner that form a torus, and a lock-up clutch.
When the lockup clutch is released, the spiral spring member transmits power from the engine to the rear shaft of the rear stage through the spiral spring member and the torus in order, and the lockup clutch is engaged. In the case where they are combined, the damper is arranged so that the power from the engine is transmitted to the rear shaft through the spiral spring member and the lockup clutch in this order.

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