JP2017150579A - Connecting structure of driving shaft member and driven shaft member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting structure of a driving shaft member and a driven shaft member using a coupling member capable of absorbing torque fluctuation of the driving shaft member, and suppressing degradation of durability of the coupling member caused by heat, in the connecting structure of the driven shaft member and the driving shaft member generating heat, through the coupling member.SOLUTION: A coupling face 50m of a coupling member having a driving-side connecting member connected to a driving shaft member, a driven-side connecting member connected to a driven shaft member, and an elastic resin member absorbing torque fluctuation, has a fastening face 51m at a driving shaft member side of the driving-side connecting member, and a resin non-fastening face 53m as a face at a driving shaft member side, of the elastic resin member, the driving shaft connecting face 32m of the driving shaft member has a connecting face 32c overlapped to the fastening face when observed from a rotating shaft direction, and a non-connecting face 32d overlapped to the resin non-fastening face, the connecting face and the fastening face are connected, and the non-connecting face and the resin non-fastening face are not connected but separated from each other.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a connection structure of a drive shaft member and a driven shaft member that connects a driven shaft member and a drive shaft member that generates heat.

  In recent years, there are industrial vehicles such as forklifts that drive an oil pump using an engine (internal combustion engine) and a rotating electric machine as drive sources. For example, in the above industrial vehicle, the crankshaft of the engine is connected to the rotor of the rotating electrical machine, the rotor of the rotating electrical machine is connected to the shaft of the oil pump, and the shaft of the rotating electrical machine connects the shaft of the oil pump and the coupling member. Connected through. In the industrial vehicle described above, when the rotating electrical machine operates as a generator, the engine serves as a driving source for the rotating electrical machine and an oil pump. When the rotating electrical machine operates as an electric motor, the rotating electrical machine serves as a driving source for the oil pump. Become. The oil pump is driven from the engine or the rotating electrical machine and generates hydraulic pressure for cargo handling. When the shaft of the oil pump is a driven shaft member, the rotor of the rotating electrical machine corresponds to the drive shaft member. As described above, various structures have been proposed for the connection structure that connects the drive shaft member and the driven shaft member via the coupling member.

  For example, Patent Document 1 discloses a rotating device in which an engine output shaft and a dynamo shaft are connected via a coupling. In this rotating device, the output shaft of the engine is connected to the second member in the coupling, the shaft of the dynamo is connected to the first member in the coupling, and the first member and the second member are It is firmly connected with bolts. In addition, heat radiating grooves are formed radially on the opposing surfaces of the first member and the second member.

JP 2011-223805 A

  In the invention described in Patent Document 1, since the first member and the second member in the coupling are firmly connected by bolts, engine torque fluctuations are directly transmitted to the dynamo, which is not preferable. . In order to absorb engine torque fluctuation, an elastic body is preferably provided between the first member and the second member. However, when an elastic body is simply sandwiched between the first member and the second member, the heat from the dynamo or the engine is directly conducted from the first member or the second member to the elastic body. End up. In general, since the elastic body is vulnerable to heat, the durability of the coupling may be reduced, and a structure in which the elastic body is simply sandwiched between the first member and the second member is not preferable.

  The present invention was devised in view of such a point, and in a coupling structure between a driven shaft member and a heat generating drive shaft member via a coupling member, a cup capable of absorbing torque fluctuation of the drive shaft member. While using a ring member, it aims at providing the connection structure of the drive shaft member and driven shaft member which can suppress the fall of durability of the coupling member by heat.

  In order to solve the above problems, the connecting structure of the drive shaft member and the driven shaft member according to the present invention takes the following means. A first aspect of the present invention is a connection structure of a drive shaft member and a driven shaft member that connects the driven shaft member and a drive shaft member that generates heat, wherein the driven shaft member includes a coupling member. The coupling member is connected to the driving shaft member, a driving side connecting member connected to the driving shaft member, a driven side connecting member connected to the driven shaft member, and the driving shaft member And an elastic resin member that absorbs torque fluctuation generated between the driven shaft member and the driven shaft member. The coupling surface, which is the surface on the drive shaft member side of the coupling member, includes a fastening surface that is a surface on the drive shaft member side of the drive side connection member, and the drive shaft of the elastic resin member. A drive non-fastening surface that is a member side surface, and a drive shaft connecting surface that is a surface on the coupling member side of the drive shaft member is viewed from a rotation axis direction of the drive shaft member. A connection surface that is a surface of the region that overlaps with the fastening surface when viewed from the direction of rotation, and a non-connection surface that is a surface of the region that overlaps with the resin non-fastening surface when viewed from the direction of the rotation axis. The connection surface and the fastening surface are directly connected, or are connected in a state of sandwiching another member provided between the drive shaft member and the coupling member, and the non-connection surface And the resin non-fastening surface is a connection structure of the drive shaft member and the driven shaft member that is not connected and is separated by a predetermined gap.

  In the first aspect of the invention, the drive shaft member and the coupling member are connected in a state where the connection surface of the drive shaft member and the fastening surface of the coupling member are directly connected or sandwiching another member. And since the non-connection surface of the drive shaft member and the resin non-fastening surface of the coupling member are spaced apart from each other without being connected, the heat of the drive shaft member that generates heat is elastic resin member It is possible to suppress conduction to Therefore, the elastic resin member can absorb the torque fluctuation of the drive side shaft member, and can suppress a decrease in the durability of the coupling member due to heat from the drive shaft member (deterioration of the elastic resin member due to heat, etc.). .

  Next, 2nd invention of this invention is a connection structure of the drive shaft member and driven shaft member which concern on the said 1st invention, Comprising: The said other member is a plate-shaped plate member, The said connection surface And the fastening surface is a connection structure of a drive shaft member and a driven shaft member, which are connected with the plate member interposed therebetween.

  In the second aspect of the invention, since the plate-shaped plate member is sandwiched between the drive shaft connecting surface of the drive shaft member and the coupling surface of the coupling member, the cup is connected to the cup from the drive shaft member. The heat conducted to the ring member can be further suppressed.

  Next, a third invention of the present invention is a coupling structure of a drive shaft member and a driven shaft member according to the first invention or the second invention, wherein the non-connection surface is connected to the connection surface. The drive shaft member and the driven shaft are recessed in a direction away from the coupling surface, and the non-connection surface is provided with an uneven shape including a groove having a depth in the direction away from the coupling surface. It is a connection structure with a member.

  In this 3rd invention, a predetermined | prescribed clearance gap can be formed appropriately by denting a non-connection surface with respect to a connection surface. Further, by providing the groove on the non-connection surface, a part of the non-connection surface can be further away from the elastic resin member. Therefore, it is possible to further suppress a decrease in durability of the coupling member due to heat from the drive shaft member (deterioration of the elastic resin member due to heat, etc.).

It is sectional drawing explaining the power unit in 1st Embodiment. It is a perspective view explaining the structure of the drive shaft connection surface of the drive shaft member in 1st Embodiment, the external appearance of the coupling surface of a coupling member, etc. In 1st Embodiment, it is a side view explaining the state which connected the coupling member in the state which pinched the plate member on the drive shaft connection surface of the drive shaft member. In the first embodiment, the appearance of the rotating electrical machine, the manner in which the coupling member is attached to the drive shaft connecting surface of the drive shaft member of the rotating electrical machine with the plate member sandwiched, the exterior of the coupling member, and the like will be described. It is a perspective view. It is a perspective view explaining the structure of the drive shaft connection surface of the drive shaft member in 2nd Embodiment, the external appearance of the coupling surface of a coupling member, etc. In 2nd Embodiment, it is a side view explaining the state which connected the coupling member to the drive shaft connection surface of the drive shaft member. It is a perspective view explaining the structure of the drive shaft connection surface of the conventional drive shaft member.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

● [Structure of power unit (Fig. 1)]
In the present embodiment, a connection structure between a drive shaft member and a driven shaft member used in a power unit of a forklift as an industrial vehicle will be described as an example. As shown in FIG. 1, the power unit 10 includes an engine 20, a rotating electrical machine 30, and an oil pump 40. For convenience, the engine 20 side will be described as the rear side, and the oil pump 40 side will be described as the front side. In the following description of the embodiments, the rotor 32 of the rotating electrical machine 30 corresponds to a drive shaft member that generates heat, and the pump shaft 42 of the oil pump 40 corresponds to a driven shaft member. Further, the rotor 32 and the pump shaft 42 are connected via a coupling member 50. A plate member 70 is sandwiched between the rotor 32 and the coupling member 50. As shown in FIG. 2, a pedestal portion 70 d is provided around the fastening hole 70 a on the coupling member 50 side of the plate member 70.

  The engine 20 is disposed on the rear side of the rotating electrical machine 30, and one end (front end) of the crankshaft 22 of the engine 20 protrudes from the front side of the engine housing 21. A connecting shaft portion 22 a having a small diameter is formed coaxially with the crankshaft 22 at the protruding end portion of the crankshaft 22. Further, the connecting shaft portion 22 a is connected to the rear end of the rotor 32 of the rotating electrical machine 30. Accordingly, the rotational power of the crankshaft 22 is transmitted to the rotor 32. When the rotating electrical machine 30 serves as a drive source, the rotational power of the rotor 32 is transmitted to the crankshaft 22. The engine housing 21 includes a cylinder head, a cylinder head cover, a cylinder block, a crankcase, an oil pan, and the like.

  The oil pump 40 is disposed on the front side of the rotating electrical machine 30, and the pump shaft 42 of the oil pump 40 protrudes from the rear surface side of the pump housing 41. A small-diameter connecting shaft portion 42 a is formed coaxially with the pump shaft 42 at the front end portion (rear end portion) of the pump shaft 42. The connection shaft portion 42 a is connected to the driven side connection member 52 of the coupling member 50. A pump support member 43 that supports the oil pump 40 with respect to the rotating electrical machine 30 is attached to the rear side of the pump housing 41. The pump support member 43 has, for example, a conical cylindrical shape whose diameter gradually decreases from the rotating electrical machine 30 side toward the oil pump 40 side, the front side being fastened to the oil pump 40, and the rear side being Fastened to the rotating electrical machine 30. The pump support member 43 is formed with a plurality of opening holes 43a for communicating waste with the internal space 43k and the outside. The formation position, shape, number, size, and the like of the opening hole 43a are appropriately set.

  The rotating electrical machine 30 is disposed on the front side of the engine 20 and on the rear side of the oil pump 40. The rotating electrical machine 30 includes a housing body 31 including a motor housing 31a, an end plate 35, and a motor cover 36. The housing body 31 is formed in a substantially cylindrical shape. Further, the end plate 35 is formed in a substantially disc shape, and a through hole for inserting the tip end portion of the crankshaft 22 is formed in the center portion so as to close the opening end surface on the rear side with respect to the housing body 31. Is attached. The end plate 35 is fastened to the engine housing 21. Further, the motor cover 36 is formed in a substantially disc shape, and a through hole for attaching the coupling member 50 is formed in the center, and the motor cover 36 is attached to the housing body 31 so as to close the front opening end face. Yes. The motor cover 36 is fastened to the pump support member 43. Further, two cylindrical cylindrical portions 36a protruding rearward are formed coaxially at the hole edge portion of the through hole in the central portion of the motor cover 36. And between the two cylinder parts 36a, the cylindrical cylinder part 70h which protruded to the front side at the outer peripheral edge part of the plate member 70 is arrange | positioned, and the labyrinth structure is formed. This labyrinth structure prevents foreign matter from entering the motor housing 31a.

  Inside the housing body 31, a substantially cylindrical rotor 32 having a flange portion 32a is supported so as to be rotatable around a rotation shaft 32J. A rotor core 33 such as a permanent magnet is attached to the outer wall of the cylindrical surface of the rotor 32. A stator core 34 having a coil or the like is attached to the inner wall of the substantially cylindrical housing body 31 so that a predetermined minute gap is formed between the rotor core 33 and the inner wall. The rotor 32 has a substantially cylindrical shape having an internal space 32k, and at least the coupling member 50 side is open. The front end of the rotor 32 (the end on the oil pump 40 side) is fastened (connected) to the drive side connection member 51 of the coupling member 50 via the plate member 70. The appearance of the coupling member 50 will be described below.

● [Appearance of coupling member 50 (FIGS. 2 and 4)]
As shown in FIGS. 2 and 4, the coupling member 50 includes a drive side connection member 51, a driven side connection member 52, and an elastic resin member 53. Further, the coupling member 50 shown in FIGS. 2 and 4 is a perspective view of the coupling member 50 in a state where the driving side connecting member 51, the driven side connecting member 52, and the elastic resin member 53 are assembled. In addition, sectional drawing of the coupling member 50 in FIG. 1 has shown II sectional drawing of the coupling member 50 shown in FIG. As shown in FIGS. 2 and 4, an elastic resin member 53 is sandwiched between the drive side connection member 51 and the driven side connection member 52 adjacent to each other in the rotation direction. The drive side connection member 51 is connected to the rotor 32 of the rotating electrical machine 30 corresponding to the drive shaft member, and the driven side connection member 52 is connected to the pump shaft 42 (see FIG. 1) of the oil pump 40 corresponding to the driven shaft member. Is done. The elastic resin member 53 is disposed between the driving side connecting member 51 and the driven side connecting member 52, and the rotational power from the driving side connecting member 51 is driven by the own elastic force by the driven side connecting member 52. Absorbs torque fluctuations when transmitting to. As described above, in the example shown in FIGS. 2 and 4, the coupling member 50 has a cylindrical shape, and the drive side connection member 51 and the driven side connection member 52 are alternately arranged along the rotation direction. An elastic resin member 53 is disposed between the drive side connection member 51 and the driven side connection member 52 in the rotation direction. Further, the coupling member 50 has a coupling surface 50m that is a surface on the rotor 32 side. The coupling surface 50m has a fastening surface 51m and a resin non-fastening surface 53m, which will be described later.

  The drive side connection member 51 is formed of a metal or an alloy (for example, aluminum), and has high rigidity and high heat resistance. The drive side connection member 51 has a fastening hole 51a for fastening with the rotor 32 with a bolt or the like. The coupling surface 50m has a fastening surface 51m that is a surface on the rotor 32 side of the drive side connecting member 51. In the example shown in FIG. 1, the fastening surface 51 m (see FIG. 2) of the drive side connection member 51 faces the rotor 32 across the plate member 70 and is fastened to the rotor 32 (drive shaft member) with bolts B ( Connected).

  The driven side connection member 52 is formed of a metal or an alloy (for example, aluminum), and has high rigidity and high heat resistance. In addition, an opening hole 52c is formed in the center portion of the driven side connection member 52, and as shown in FIG. 1, the connection shaft portion 42a of the pump shaft 42 is spline-fitted into the opening hole 52c (see FIG. 2). The driven side connecting member 52 is fastened (coupled) to the pump shaft 42 (driven shaft member). 2 and 5, the coupling surface 50m has a resin non-fastening surface 53m in which a non-fastening surface which is a surface on the rotor 32 side of the driven side connecting member 52 is covered with an elastic resin member 53. doing. In addition, the structure by which the surface by the side of the rotor 32 in the driven side connection member 52 is not covered with the elastic resin member 53, but is exposed to the plate member 70 side or the rotor 32 side may be sufficient. In this case, a portion of the elastic resin member 53 that is sandwiched between the driving side connecting member 51 and the driven side connecting member 52 in the circumferential direction is exposed to the rotor 32 side. Therefore, the coupling surface 50m has a fastening surface 51m and a resin non-fastening surface 53m that is a surface of the elastic resin member 53 on the drive shaft member (rotor 32) side.

  The elastic resin member 53 is formed of a resin having an elastic force, and absorbs torque fluctuation when the rotational power from the driving side connection member 51 is transmitted to the driven side connection member 52 by the elastic force. Further, as described above, the elastic resin member 53 has the resin non-fastening surface 53m. In addition, since the elastic resin member 53 is resin, compared with a metal, an alloy, etc., heat resistance is low.

  As shown in FIG. 2, the coupling member 50 in a state where the driving side connecting member 51, the elastic resin member 53, and the driven side connecting member 52 are assembled has a coupling surface having a fastening surface 51m and a resin non-fastening surface 53m. 50 m is provided on the rotor 32 side.

[[Connecting structure of drive shaft member and driven shaft member in the first embodiment (FIGS. 2 to 4)]
As shown in FIG. 2, the drive shaft connecting surface 32m, which is the surface on the coupling member 50 side in the rotor 32, has a connecting surface 32c and a non-connecting surface 32d. The connection surface 32c is a surface of a region overlapping the fastening surface 51m when viewed from the direction of the rotation shaft 32J of the rotor 32, and is a surface facing the fastening surface 51m with the plate member 70 interposed therebetween. The non-connection surface 32d is a surface of a region overlapping with the resin non-fastening surface 53m when viewed from the direction of the rotation shaft 32J of the rotor 32, and is a surface facing the resin non-fastening surface 53m with the plate member 70 interposed therebetween. A fastening hole 32e is formed in the connection surface 32c at a position corresponding to the fastening hole 51a of the fastening surface 51m.

  As shown in FIGS. 1 and 4, the bolt B is inserted into the fastening hole 51a and the fastening hole 70a and the fastening hole 32e of the plate member 70, and the plate member 70 (the rotor 32 and the coupling member is inserted into the connection surface 32c. The fastening surface 51m of the drive side connecting member 51 is fastened (connected) in a state in which it is sandwiched between them (corresponding to the other member provided between the first side and the second side). Further, the non-connection surface 32d is recessed with respect to the connection surface 32c in a direction away from the coupling member 50 (in this case, the X-axis direction), and as shown in FIG. 3, the non-connection surface 32d and the elastic resin A predetermined gap 32 s is formed between the member 53 and the resin non-fastening surface 53 m (see FIG. 2). Therefore, the non-connecting surface 32d and the resin non-fastening surface 53m are separated from each other with a predetermined gap 32s without being connected.

  A groove 32f having a depth in a direction away from the coupling surface 50m (coupling member 50) is formed in the non-connection surface 32d. The groove 32f may be formed to extend in the circumferential direction, may be formed to extend in the radial direction, or may be formed to be inclined by a predetermined angle with respect to the radial direction. The direction in which the groove 32f formed in the non-connection surface 32d extends may be any direction. Further, the depth and width of the groove 32f, the number of the grooves 32f, and the like are not particularly limited.

  In addition, you may make it form various uneven | corrugated shapes in the non-connection surface 32d, without forming the groove | channel 32f in the non-connection surface 32d. For example, a plurality of protrusions extending in the radial direction (protrusions protruding in a direction approaching the coupling member 50) or a plurality of recesses (coupling member 50 inclined at a predetermined angle with respect to the radial direction) are provided on the non-connection surface 32d. (A recess recessed in a direction away from the center) may be formed. Forming the groove 32f in the non-connecting surface 32d is included in forming an uneven shape in the non-connecting surface 32d.

  On the other hand, the drive shaft connection surface 132m of the conventional rotor 132 shown in FIG. 7 has a flat shape without any unevenness without distinction between a connection surface and a non-connection surface. For this reason, the drive shaft connection surface 132m contacts both the fastening surface 151m of the coupling surface 150m of the coupling member 150 and the resin non-fastening surface 153m. Therefore, the heat from the rotor 132 is also directly conducted to the resin non-fastening surface 153m.

  In the connection structure of the drive shaft member (in this case, the rotor 32) and the driven shaft member (in this case, the pump shaft 42) in the first embodiment, as shown in FIGS. Since the gap 32s (see FIG. 3) is formed between the resin non-fastening surface 53m and the non-connection surface 32d of the rotor 32, the heat from the rotor 32 is directly conducted to the resin non-fastening surface 53m. There is nothing. Therefore, since heat conduction to the elastic resin member 53 can be suppressed, it is possible to suppress a decrease in durability of the coupling member 50 (deterioration of the elastic resin member due to heat, etc.). Further, since it is possible to suppress a decrease in durability of the coupling member 50 due to heat, it is possible to connect the coupling member 50 close to the rotor 32 with the thin plate-like plate member 70 being sandwiched between the power unit and the power unit. The axial length of 10 can be made shorter. Accordingly, the power unit 10 can be made more compact in the axial direction.

  Further, since the groove 32f is further away from the coupling member 50 by providing the groove 32f on the non-connection surface 32d, the conduction of heat from the rotor 32 to the resin non-fastening surface 53m is the same as in the second embodiment described later. In comparison, it can be further reduced. In addition, a pedestal portion 70 d that is convex toward the coupling member 50 is provided around the fastening hole 70 a on the coupling member 50 side of the plate member 70. Accordingly, the fastening surface 51m of the coupling member 50 contacts the plate member 70 at the pedestal portion 70d, but the resin non-fastening surface 53m of the coupling member 50 is spaced apart from the plate member 70 without contact. Yes. Thereby, heat conduction from the rotor 32 to the resin non-fastening surface 53m can be further reduced.

[[Connection structure of drive shaft member and driven shaft member in the second embodiment (FIGS. 5 and 6)]
Next, a second embodiment of the connection structure between the drive shaft member and the driven shaft member will be described with reference to FIGS. In the second embodiment, the structure of the drive shaft connection surface 32n of the rotor 32 is different from the structure of the drive shaft connection surface 32m of the first embodiment shown in FIG. 2, and a groove 32f is formed in the non-connection surface 32d. The difference is that the plate member 70 is not sandwiched. Hereinafter, this difference will be mainly described.

  The non-connecting surface 32d shown in FIG. 5 is not formed with a groove 32f as compared with the non-connecting surface 32d shown in FIG. 2, but the coupling surface 50m (that is, the coupling member 50) with respect to the connecting surface 32c. ) Is the same in that it is recessed in the direction away from (in this case, the X-axis direction). Further, the plate member 70 is omitted. Accordingly, the connection surface 32c of the drive shaft connection surface 32n directly faces the fastening surface 51m of the coupling surface 50m, and the connection surface 32c and the fastening surface 51m are directly connected. The non-connection surface 32d and the resin non-fastening surface 53m directly face each other, but are separated from each other with a predetermined gap 32s without being connected.

  In the connection structure of the drive shaft member (in this case, the rotor 32) and the driven shaft member (in this case, the pump shaft 42) in the second embodiment, the non-connection surface 32d is compared with the first embodiment. Since there is no groove and the plate member is omitted, the amount of heat conduction increases slightly. However, as shown in FIGS. 5 and 6, a gap 32 s is formed between the resin non-fastening surface 53 m of the coupling member 50 and the non-connecting surface 32 d of the rotor 32 as in the first embodiment. Therefore, the heat from the rotor 32 is not directly conducted to the resin non-fastening surface 53m. Therefore, since heat conduction to the elastic resin member 53 can be suppressed, it is possible to suppress a decrease in durability of the coupling member 50 (deterioration of the elastic resin member due to heat, etc.). In addition, since it is possible to suppress a decrease in durability of the coupling member 50 due to heat, the coupling member 50 can be directly connected to the rotor 32 (since the plate member 70 is not sandwiched), and the power unit 10 The axial length can be made shorter than in the first embodiment. Accordingly, the power unit 10 can be made more compact in the axial direction.

  As described above, the drive shaft member (in this case, the rotor 32) and the driven shaft member (in this case, the pump shaft 42) via the coupling member 50 described in the first embodiment and the second embodiment. With the connecting structure, the elastic resin member 53 of the coupling member 50 can absorb the torque fluctuation of the drive side shaft member. Further, the connection surface 32c and the fastening surface 51m are directly connected (second embodiment) or connected in a state of sandwiching another member (first embodiment), and the non-connection surface 32d is not connected to the resin surface. The fastening surface 53m is not connected and is separated by a predetermined gap 32s. For this reason, it is suppressed that the heat from the drive shaft member is conducted to the elastic resin member 53 of the coupling member 50, and the deterioration of the durability of the coupling member 50 (deterioration of the elastic resin member due to heat, etc.) is suppressed. be able to.

  The connection structure of the drive shaft member and the driven shaft member of the present invention is not limited to the configuration, structure, shape, etc. described in the present embodiment, and various modifications, additions, and deletions are possible without changing the gist of the present invention. Is possible. For example, the structure of the coupling member 50, the shape of the drive side connection member 51, the shape of the driven side connection member 52, the shape of the elastic resin member 53, and the like are limited to those described in the present embodiment. is not.

  In the description of the first embodiment, the plate member 70 is used as an example of another member provided between the rotor 32 and the coupling member 50. However, the other member is not limited to the plate member. Various members can be used as other members.

  In the description of the present embodiment, an example in which a rotor of a rotating electrical machine used in a power unit of a forklift as an industrial vehicle is a drive shaft member, and an oil pump pump shaft of the power unit is a driven shaft member, The drive shaft member is not limited to the rotor, and the driven shaft member is not limited to the pump shaft. Therefore, the present invention can be applied to a connection structure of a drive shaft member and a driven shaft member used for various devices and various applications.

DESCRIPTION OF SYMBOLS 10 Power unit 20 Engine 21 Engine housing 22 Crankshaft 30 Rotating electric machine 31 Housing body 31a Motor housing 32 Rotor (drive shaft member)
32c Connecting surface 32d Non-connecting surface 32e Fastening hole 32f Groove 32J Rotating shaft 32k Internal space 32m, 32n Driving shaft connecting surface 32s Gap 33 Rotor core 34 Stator core 36 Motor cover 36a Tube portion 40 Oil pump 42 Pump shaft (driven shaft member)
43 pump support member 50 coupling member 50m coupling surface 51 drive side connection member 51a fastening hole 51m fastening surface 52 driven side connection member 53 elastic resin member 53m resin non-fastening surface 70 plate member (other member)
70a Fastening hole 70d Pedestal part 70h Tube part

Claims (3)

A connection structure of a drive shaft member and a driven shaft member that connects the driven shaft member and a drive shaft member that generates heat,
The driven shaft member is connected to the drive shaft member via a coupling member,
The coupling member includes a driving side connecting member connected to the driving shaft member, a driven side connecting member connected to the driven shaft member, and a torque fluctuation generated between the driving shaft member and the driven shaft member. And an elastic resin member that absorbs
A coupling surface that is a surface of the coupling member on the side of the drive shaft member includes a fastening surface that is a surface of the drive side connection member on the side of the drive shaft member, and a coupling surface of the drive shaft member of the elastic resin member. A resin non-fastening surface to be a side surface,
A drive shaft connection surface that is a surface of the drive shaft member on the side of the coupling member is a connection surface that is a surface of a region that overlaps the fastening surface when viewed from the rotation axis direction of the drive shaft member, and the rotation A non-connection surface that is a surface of a region overlapping with the resin non-fastening surface when viewed from the axial direction,
The connection surface and the fastening surface are directly connected, or connected in a state of sandwiching another member provided between the drive shaft member and the coupling member,
The non-connection surface and the resin non-fastening surface are spaced apart with a predetermined gap without being connected,
Connection structure of drive shaft member and driven shaft member. A drive shaft member and a driven shaft member according to claim 1,
The other member is a plate-shaped plate member,
The connection surface and the fastening surface are connected in a state of sandwiching the plate member,
Connection structure of drive shaft member and driven shaft member. A connection structure between the drive shaft member and the driven shaft member according to claim 1 or 2,
The non-connection surface is recessed in a direction away from the coupling surface with respect to the connection surface,
The non-connection surface is provided with an uneven shape including a groove having a depth in a direction away from the coupling surface.
Connection structure of drive shaft member and driven shaft member.

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