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power transmission device

A power transmission device, driving force technology, applied in vibration suppression adjustment, magnetic drive clutch, non-mechanical drive clutch, etc., can solve problems such as lack of durability

Active Publication Date: 2020-09-08
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the study of the present inventors, it is judged that in the structure of the electromagnetic clutch described in Patent Document 1, the elastic member is respectively bonded to the inner peripheral surface of the holding plate and the outer peripheral surface of the hub, due to the Elastic components act not only on compressive loads but also on tensile loads, thus lacking durability

Method used

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Experimental program
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Effect test

no. 1 approach

[0050] refer to Figure 1 to Figure 14 This embodiment will be described. In this embodiment, for applying the power transmission device 10 to figure 1 The illustrated example of the compressor 2 of the vapor compression refrigeration cycle 1 will be described.

[0051] The refrigeration cycle 1 functions as a device that adjusts the temperature of air blown into the vehicle interior in a vehicle air conditioner that performs air conditioning in the vehicle interior. The refrigeration cycle 1 is composed of a closed loop connecting the following structures: a compressor 2 that compresses and discharges refrigerant; a radiator 3 that dissipates heat from the refrigerant discharged from the compressor 2; An expansion valve 4 for reducing pressure; and an evaporator 5 for evaporating the refrigerant decompressed by the expansion valve 4 .

[0052] The rotational driving force output from the engine 6 is transmitted to the compressor 2 via the power transmission device 10 . In...

no. 2 approach

[0132] Next, refer to Figure 15 A second embodiment will be described. In this embodiment, the shape of the outer hub 16A, the inner hub 17A, and the elastic member 18A constituting the hub 15A is different from that of the first embodiment.

[0133] like Figure 15 As shown, three extension portions 171A extending outward in the radial direction DRr of the shaft 20 are provided on the outer peripheral side of the inner hub 17A in this embodiment. The three extension portions 171A are provided at equal intervals in the rotational direction RD of the shaft 20 . Accordingly, the outer shape of the inner hub 17A is a trident shape (that is, a Y-shape).

[0134] Furthermore, the outer hub 16A of the present embodiment has a shape in which the inner peripheral side of the outer hub 16A overlaps with the three extension portions 171A in the rotation direction RD of the shaft 20 and surrounds the plurality of extension portions 171A.

[0135] In addition, the elastic member 18A ...

no. 3 approach

[0139] As described in the above-mentioned first embodiment, the elastic member 18 has a function as an urging member and a function as a buffer member, and as the urging member, the elastic member 18 urges the rotor 11 in a direction away from the rotor 11. The armature 14 acts as a biasing force, and the elastic member 18 as a buffer member transmits the rotational force of the outer hub 16 to the inner hub 17 in a buffered manner. In the above-mentioned first embodiment, the non-overlapping insertion portions 182 and 183 of the elastic member 18 are separated from the outer hub 16 and the inner hub 17 . Therefore, in the first embodiment, the overlapping insertion portion 181 of the elastic member 18 functions as an urging member and a cushioning member.

[0140] Here, in order to ensure the durability against torsional deformation of the elastic member 18 , the present inventors studied to increase the spring constant of the elastic member 18 in the rotation direction RD o...

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Abstract

The power transmission device includes an electromagnet (12), a rotor (11), an armature (14), and a hub (15, 15A) connecting the armature to a shaft of a device to be driven. The hub is configured to include an outer hub (16, 16A) connected to the armature, an inner hub (17, 17A) connected to the shaft, and an elastic member (18) located between the outer hub and the inner hub. A plurality of extensions (171, 171A) extending radially outward of the shaft are provided on the outer peripheral side of the inner hub. An inner peripheral side wall portion (162, 162A) that overlaps with the plurality of extension portions in the rotational direction of the shaft and surrounds the plurality of extension portions is provided on the inner peripheral side of the outer hub. Furthermore, the elastic member is arranged so as to be in a non-adhered state with at least one of the inner hub and the outer hub between the outer peripheral side of the inner hub and the inner peripheral side of the outer hub.

Description

[0001] Cross-reference of related applications [0002] This application is based on Japanese Application No. 2016-219746 filed on November 10, 2016 and Japanese Application No. 2017-194962 filed on October 5, 2017, and the contents of the description are incorporated herein. technical field [0003] The present invention relates to a power transmission device that transmits rotational driving force output from a drive source to a device to be driven. Background technique [0004] Conventionally, there is known an electromagnetic clutch (for example, refer to Patent Document 1) in which the inner peripheral surface of the retaining plate connected to the armature is formed in a non-circular shape, and the outer peripheral surface of the hub connected to the shaft is formed in a non-circular shape. , In addition, the elastic member is located between the retaining plate and the hub. This Patent Document 1 discloses that an elastic member is bonded to the inner peripheral sur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D27/112F16F15/126
CPCF16D27/112F16D3/68F16H2055/366F16H55/36
Inventor 林敏弘永桥广树黑畑清小西俊宏樱场茂圭广瀬贵之
Owner DENSO CORP