JP2020097990A - Mounting structure of shear bolt - Google Patents

Mounting structure of shear bolt Download PDF

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JP2020097990A
JP2020097990A JP2018236211A JP2018236211A JP2020097990A JP 2020097990 A JP2020097990 A JP 2020097990A JP 2018236211 A JP2018236211 A JP 2018236211A JP 2018236211 A JP2018236211 A JP 2018236211A JP 2020097990 A JP2020097990 A JP 2020097990A
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Prior art keywords
shear bolt
pressing member
rotating body
shear
bolt
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JP7218894B2 (en
Inventor
渉 藤長
Wataru Fujinaga
渉 藤長
弘 岡嶋
Hiroshi Okajima
弘 岡嶋
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Takakita Co Ltd
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Takakita Co Ltd
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Priority to JP2018236211A priority Critical patent/JP7218894B2/en
Priority to CN201920146997.XU priority patent/CN209892711U/en
Priority to KR1020190017695A priority patent/KR102646759B1/en
Publication of JP2020097990A publication Critical patent/JP2020097990A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/02—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like
    • F16D1/033—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like by clamping together two faces perpendicular to the axis of rotation, e.g. with bolted flanges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/02—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
    • F16B31/021—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load by means of a frangible part
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/14—Cap nuts; Nut caps or bolt caps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Gears, Cams (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

To provide a mounting structure of a shear bolt capable of easily mounting the shear bolt even when an area of a rotor such as a sprocket is small, pressing head portions of the shear bolts by one pressing member even when the shear bolts are mounted on a plurality of places, and further minimizing vibration and noise in rotation.SOLUTION: A driving-side rotor 1 such as a sprocket at a driving side, and a transmission-side rotor 2 such as a sprocket at a transmission side are disposed on a rotating shaft 3 in a manner that a pressing member 5 is rotatable. A head portion 41 of a shear bolt 4 inserted into through holes 11, 21 formed on outer peripheral surfaces of the driving-side rotor 1 and the transmission-side rotor 2 is pressed by a pressing portion 51 disposed on a pressing member 5, thus the shear bolt 4 can be fixed without mounting a nut.SELECTED DRAWING: Figure 1

Description

本発明は、シェアボルトの取付構造に関するものであり、より詳しくは、簡単にスプロケットなどの回転体にシェアボルトを取り付けられるようにしたシェアボルトの取付構造に関するものである。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shear bolt mounting structure, and more particularly, to a shear bolt mounting structure capable of easily mounting a shear bolt to a rotating body such as a sprocket.

従来より、駆動源側のスプロケットと伝達側のスプロケットとの間における過負荷防止装置として、シェアボルトを用いた過負荷防止装置がある。このようなシェアボルトを用いた過負荷防止装置は、図５に示すように、エンジンなどからの駆動源によって回転する駆動源側のスプロケットなどの駆動側回転体８１と、その駆動側回転体８１と同軸上に設けられた伝達側のスプロケットなどの伝達側回転体８２とを備え、これらの回転体８１、８２の間にシェアボルト８３を通して一体的に回転させるようにしたものであって、伝達側回転体に大きな負荷が掛かった場合に、そのシェアボルト８３を破断させて、エンジンなどからの駆動力を遮断させるようにしたものである。 Conventionally, as an overload prevention device between a sprocket on the drive source side and a sprocket on the transmission side, there is an overload prevention device using a shear bolt. As shown in FIG. 5, an overload prevention device using such a shear bolt includes a drive side rotating body 81 such as a drive source side sprocket that is rotated by a drive source such as an engine, and the drive side rotating body 81. And a transmission-side rotating body 82 such as a transmission-side sprocket provided coaxially with each other, and a shear bolt 83 is inserted between the rotating bodies 81 and 82 to integrally rotate the transmission-side rotating body 82. When a large load is applied to the side rotating body, the shear bolt 83 is broken to shut off the driving force from the engine or the like.

ところで、このようなシェアボルト８３は、駆動側回転体８１の外周面と伝達側回転体８２の外周面の貫通穴８１ａ、８２ａに挿入され、突出している先端側をナット８４で固定するようにしている。このため、ナット８４を取り付けるためのスペースを充分確保することができない場合は、その狭いスペースで作業するための専用工具を用意しなければならず、その専用工具を用意するためのコストや、ナット８４を取り付けるための時間がかかってしまうといった問題があった。 By the way, such a shear bolt 83 is inserted into the through holes 81a, 82a of the outer peripheral surface of the driving side rotating body 81 and the outer peripheral surface of the transmitting side rotating body 82, and the protruding tip side is fixed by the nut 84. ing. Therefore, if a sufficient space for mounting the nut 84 cannot be secured, a dedicated tool for working in the narrow space must be prepared, and the cost for preparing the dedicated tool and the nut There was a problem that it took time to attach 84.

これに対して、ナットでシェアボルトを固定することなく、シェアボルトの頭部を弾性体で被せるようにして挿入状態を維持しておくようにした方法が提案されている（特許文献１）。 On the other hand, a method has been proposed in which the head of the shear bolt is covered with an elastic body and the inserted state is maintained without fixing the shear bolt with a nut (Patent Document 1).

このような装置は、図６に示すように、スプロケットの外周部分に回動可能なレバー９１を設け、そのレバー９１を回動させることによって、シェアボルトの頭部９２を被せるように押圧して、シェアボルトの抜けを防止するようにしたものである。 As shown in FIG. 6, such a device is provided with a rotatable lever 91 on an outer peripheral portion of a sprocket, and by rotating the lever 91, a head 92 of a shear bolt is pressed to be covered. It is designed to prevent the shear bolt from coming off.

特開２００１―１９３０３２号公報Japanese Patent Laid-Open No. 2001-193032

しかしながら、このような構成では、スプロケットなどの回転体が小さい場合、回動レバー９１を取り付けるための十分なスペースを確保することができない。このため、必然的にスプロケットを大きくしなければならないといった問題がある。また、シェアボルトを複数箇所に取り付ける場合、その取り付け箇所に対応して回動レバー９１を取り付けなければならず、更に大きなスペースが必要になるといった問題がある。さらには、外周面にこのような回動レバー９１を取り付ける場合、回転体の重心が回転中心から大きくずれてしまい、振動や騒音を生じさせる原因となりかねない。 However, with such a configuration, when the rotating body such as the sprocket is small, it is not possible to secure a sufficient space for mounting the rotating lever 91. Therefore, there is a problem that the sprocket must be enlarged. Further, when the shear bolts are attached to a plurality of places, the turning lever 91 has to be attached corresponding to the attaching positions, which causes a problem that a larger space is required. Furthermore, when such a rotating lever 91 is attached to the outer peripheral surface, the center of gravity of the rotating body may deviate significantly from the center of rotation, which may cause vibration and noise.

そこで、本発明は上記課題を解決するために、スプロケットなどの回転体の面積が小さい場合であっても、簡単にシェアボルトを取り付けることができ、また、複数箇所にシェアボルトを取り付ける場合であっても、一つの押圧部材でシェアボルトの頭部を押圧することができ、さらには、可能な限り回転時における振動や騒音を防止できるようにしたシェアボルトの取付構造を提供することを目的とする。 Therefore, in order to solve the above problems, the present invention is a case where the share bolt can be easily attached even when the area of the rotating body such as the sprocket is small, and the share bolt is attached to a plurality of places. Even if the head of the shear bolt can be pressed with one pressing member, further, it is an object to provide a structure for mounting the shear bolt that can prevent vibration and noise during rotation as much as possible. To do.

すなわち、本発明は上記課題を解決するために、駆動側回転体と伝達側回転体を同一軸上に設け、当該駆動側回転体と伝達側回転体の外周面に設けられた貫通穴にシェアボルトを取り付けるようにしたシェアボルトの取付構造において、前記同一軸を中心として回動可能な押圧部材を設け、当該押圧部材を回動させてシェアボルトの頭部を押圧させるようにしたものである。 That is, in order to solve the above problems, the present invention provides a drive-side rotary body and a transmission-side rotary body on the same axis, and shares them in through holes provided on the outer peripheral surfaces of the drive-side rotary body and the transmission-side rotary body. In a shear bolt mounting structure in which a bolt is mounted, a pressing member rotatable about the same axis is provided, and the pressing member is rotated to press the head of the shear bolt. ..

このように構成すれば、駆動側回転体などの回動軸と同一軸上に押圧部材を設けてシェアボルトの頭部を押圧させているので、外周面の面積が小さい場合であっても、押圧部材を回動させてシェアボルトの頭部を押圧させることができるようになる。また、貫通穴を外周面の同一径上に設ければ、一つの押圧部材で他の位置に挿入されたシェアボルトの頭部を押圧させることができる。さらには、駆動側回転体と同一軸上に押圧部材を設けているため、駆動側回転体などの重心が回動軸から大きくずれるようなことがなくなり、回転時における振動などもなくなる。 According to this structure, since the pressing member is provided on the same axis as the rotating shaft such as the driving side rotating body to press the head of the shear bolt, even when the area of the outer peripheral surface is small, The pressing member can be rotated to press the head of the shear bolt. Further, if the through holes are provided on the same diameter of the outer peripheral surface, it is possible to press the head portion of the shear bolt inserted at another position with one pressing member. Furthermore, since the pressing member is provided on the same axis as the driving side rotating body, the center of gravity of the driving side rotating body does not largely deviate from the rotation axis, and vibration during rotation also disappears.

また、このような発明において、前記押圧部材を、前記同一軸に設けられた弾性体によって軸方向に押圧可能に設けるようにする。 Further, in such an invention, the pressing member is provided so as to be axially pressed by an elastic body provided on the same shaft.

このように構成すれば、その弾性体によって軸方向に押圧部材を退避させてシェアボルトの頭部を確実に押圧させることができるようになる。 According to this structure, the elastic member allows the pressing member to be retracted in the axial direction to reliably press the head portion of the shear bolt.

さらに、前記貫通穴を、前記同一軸に対して同一半径上に設けるようにする。 Further, the through holes are provided on the same radius with respect to the same axis.

このように構成すれば、長期間の使用によって貫通穴の内径が広がってしまった場合であっても、同一半径上に設けられた他の貫通穴にシェアボルトを通して、同じ押圧部材でシェアボルトを押圧させることができるようになる。 According to this structure, even if the inner diameter of the through hole is widened due to long-term use, the share bolt is passed through the other through holes provided on the same radius and the share bolt is attached by the same pressing member. Can be pressed.

また、前記押圧部材を、シェアボルトの頭部を被せる凹部を設けるように構成する。 In addition, the pressing member is configured to have a recess for covering the head of the shear bolt.

このように構成すれば、凹部と弾性部材によって頭部を確実に固定することができるようになる。 According to this structure, the head can be reliably fixed by the recess and the elastic member.

また、前記凹部の中心に開口部を設けるようにする。 An opening is provided at the center of the recess.

このように構成すれば、シェアボルトが取り付けられているか否かの状態を視認することができるようになる。 According to this structure, it is possible to visually check whether the shear bolt is attached or not.

また、駆動側回転体もしくは伝達側回転体よりも表面側に離間したレバーを設けるようにする。 Further, a lever is provided on the front surface side of the driving-side rotating body or the transmitting-side rotating body.

このようなレバーを設ければ、レバーと回転体との間に手を入れて手前に引くことにより、押圧部材を手前に引くことができ、その状態から、レバーを回動させることによって、シェアボルトの頭部を嵌め込ませることができるようになる。 If such a lever is provided, it is possible to pull the pressing member forward by putting a hand between the lever and the rotating body and pulling it toward you. You will be able to fit the head of the bolt.

本発明によれば、駆動側回転体などの回動軸と同一軸上に押圧部材を設けてシェアボルトの頭部を押圧させているので、外周面の面積が小さい場合であっても、押圧部材を回動させてシェアボルトの頭部を押圧させることができるようになる。また、貫通穴を外周面の同一径上に設ければ、一つの押圧部材で他の位置に挿入されたシェアボルトの頭部を押圧させることができる。さらには、駆動側回転体と同一軸上に押圧部材を設けているため、駆動側回転体などの重心が回動軸から大きくずれるようなことがなくなり、回転時における振動などもなくなる。 According to the present invention, since the pressing member is provided on the same axis as the rotary shaft of the drive side rotating body to press the head of the shear bolt, even if the area of the outer peripheral surface is small, the pressing It becomes possible to rotate the member to press the head of the shear bolt. Further, if the through holes are provided on the same diameter of the outer peripheral surface, it is possible to press the head portion of the shear bolt inserted at another position with one pressing member. Furthermore, since the pressing member is provided on the same axis as the driving side rotating body, the center of gravity of the driving side rotating body does not largely deviate from the rotation axis, and vibration during rotation also disappears.

本発明の一実施の形態におけるシェアボルトの取付構造を示す図The figure which shows the mounting structure of the shear bolt in one embodiment of this invention. 同形態におけるシェアボルトの取付構造を示す図The figure which shows the mounting structure of the shear bolt in the same form. 同形態におけるシェアボルトを示す図The figure which shows the shear bolt in the same form. 他の実施の形態における押圧部材を示す図The figure which shows the pressing member in other embodiment. 従来例におけるシェアボルトの取付構造を示す図Diagram showing the mounting structure of the shear bolt in the conventional example 従来例におけるシェアボルトの取付構造を示す図Diagram showing the mounting structure of the shear bolt in the conventional example

以下、本発明の一実施の形態について、図面を参照しながら説明する。 An embodiment of the present invention will be described below with reference to the drawings.

この実施の形態におけるシェアボルト４の取付構造は、エンジンなどの駆動源から伝達された力をスプロケットを介して他の動作部に伝達させるようにしたものであって、動作部側で大きな負荷が生じた場合に、スプロケットに取り付けられたシェアボルト４を破断させて動力を遮断させるようにしたものである。そして、特徴的に、図１や図２に示すように、同一の回動軸３上に設けられた駆動側回転体１と伝達側回転体２との間に跨って設けられたシェアボルト４に対して、その回動軸３上に押圧部材５を回動可能に設け、その押圧部材５を回動させることにより、シェアボルト４の頭部４１を押圧部５１で押圧させるようにして、ナットを取り付けることなく、シェアボルト４を固定できるようにしたものである。以下、本実施の形態について、詳細に説明する。 The mounting structure of the shear bolt 4 in this embodiment is designed to transmit the force transmitted from a drive source such as an engine to another operating unit via a sprocket, and a large load is exerted on the operating unit side. When it occurs, the shear bolt 4 attached to the sprocket is broken to shut off the power. Characteristically, as shown in FIGS. 1 and 2, the share bolt 4 provided across the drive-side rotary body 1 and the transmission-side rotary body 2 provided on the same rotary shaft 3. On the other hand, the pressing member 5 is rotatably provided on the rotating shaft 3, and the head 41 of the shear bolt 4 is pressed by the pressing portion 51 by rotating the pressing member 5. The shear bolt 4 can be fixed without attaching a nut. Hereinafter, the present embodiment will be described in detail.

まず、駆動側回転体１は、エンジンからの駆動力によって回転するものであって、ここでは、チェーンによって回転するスプロケットによって構成される。なお、ここでは、スプロケットを例に挙げて説明するが、ギアによって回転するギアや、ベルトによって回転するプーリーなどで構成されてもよい。この駆動側回転体１は、回動軸３を中心として回転するようになっており、この回動軸３上に設けられた他の伝達側回転体２にシェアボルト４を介して力を伝達させるようになっている。 First, the drive-side rotating body 1 is rotated by the driving force from the engine, and here is composed of a sprocket that is rotated by a chain. Although a sprocket will be described as an example here, the sprocket may be configured with a gear that rotates with a gear, a pulley that rotates with a belt, or the like. The drive-side rotating body 1 is configured to rotate about a rotating shaft 3, and transmits a force to another transmitting-side rotating body 2 provided on the rotating shaft 3 via a shear bolt 4. It is designed to let you.

この伝達側回転体２は、他の動作部に対して駆動力を伝達させるものであって、ここでは、チェーンで駆動力を伝達するスプロケットで構成される。なお、この実施の形態では、スプロケットを伝達側回転体２の例として挙げて説明するが、同様に、ギアによって回転するギアや、ベルトによって回転するプーリーなどで構成されてもよく、あるいは、フランジ状にしておいてシェアボルト４を介して回動軸３を回動させるようにしてもよい。 The transmission-side rotating body 2 is for transmitting the driving force to other operating parts, and is composed of a sprocket for transmitting the driving force by a chain here. In this embodiment, a sprocket will be described as an example of the transmission side rotating body 2. However, similarly, a sprocket may be configured by a gear that rotates by a gear, a pulley that rotates by a belt, or a flange. Alternatively, the rotary shaft 3 may be rotated via the shear bolt 4.

これらの駆動側回転体１や伝達側回転体２の外周面には、シェアボルト４を貫通させるための貫通穴１１、２１が設けられる。この貫通穴１１、２１は、シェアボルト４とほぼ同径を有するものであって、回転時におけるガタつきをなくすために、可能な限り隙間幅を小さくして設けられる。しかし、このように隙間幅を小さくしても、シェアボルト４を介して駆動力を伝達側回転体２に伝達させる際に、使用によって貫通穴１１、２１の内径が広がっていき、ガタつきを生じさせてしまう。そこで、ここでは、複数個所に貫通穴１１、２１を設けておき、その貫通穴１１、２１が広がった際に、他の貫通穴１１、２１にシェアボルト４を取り付けて使用できるようにしている。このような貫通穴１１、２１を設ける位置としては、回動軸３の回転中心から同じ径の位置に設けておき、後述する押圧部材５を回転させて、シェアボルト４の頭部４１を押圧させるようにしておく。 Through holes 11 and 21 through which the shear bolt 4 penetrates are provided on the outer peripheral surfaces of the drive-side rotary body 1 and the transmission-side rotary body 2. The through holes 11 and 21 have substantially the same diameter as the shear bolt 4, and are provided with a gap width as small as possible in order to eliminate rattling during rotation. However, even if the gap width is reduced in this way, when the driving force is transmitted to the transmission side rotating body 2 via the shear bolt 4, the inner diameters of the through holes 11 and 21 become wider due to use, and rattling occurs. Will cause it. Therefore, here, the through holes 11 and 21 are provided at a plurality of places, and when the through holes 11 and 21 spread, the share bolt 4 can be attached to the other through holes 11 and 21 to be used. .. The through holes 11 and 21 are provided at positions having the same diameter from the center of rotation of the rotary shaft 3, and the pressing member 5 described later is rotated to press the head 41 of the shear bolt 4. Let me let you.

この貫通穴１１、２１に挿入されるシェアボルト４は、図３に示すように、頭部４１を有するとともに、破断部分の外径を破断力に対応させた径を有する軸部４２を有するものであって、六角ボルトや、円形状の頭部４１を有するピンなどによって構成される。なお、この軸部４２については、破断力に対応させて小径部分や切込部分などを設けるようにしてもよいし、あるいは、同一径をなす円柱状としてもよい。 As shown in FIG. 3, the shear bolt 4 inserted into the through holes 11 and 21 has a head portion 41 and a shaft portion 42 having a diameter corresponding to the breaking force of the outer diameter of the breaking portion. It is composed of a hexagon bolt, a pin having a circular head 41, and the like. The shaft portion 42 may be provided with a small-diameter portion, a cut portion, or the like corresponding to the breaking force, or may be a columnar shape having the same diameter.

このような構成のもと、本実施の形態では、シェアボルト４の頭部４１を押圧する押圧部材５が設けられる。この押圧部材５は、前記回動軸３上に設けられ、その外周部分に設けられた押圧部５１によって、シェアボルト４の頭部４１を押圧させるようにしている。 With this configuration, in the present embodiment, the pressing member 5 that presses the head 41 of the shear bolt 4 is provided. The pressing member 5 is provided on the rotating shaft 3, and the pressing portion 51 provided on the outer peripheral portion of the pressing member 5 presses the head portion 41 of the shear bolt 4.

この押圧部材５は、回動軸３のフランジ部３２との間に設けられたバネ３１などの弾性体によって、伝達側回転体２の表面側に向けて強く押圧されるようになっている。なお、ここでは、伝達側回転体２の表面側に押圧部材５を設けているが、伝達側回転体２と駆動側回転体１を逆にして、駆動側回転体１の表面側に押圧部材５を設けるようにしてもよい。この押圧部材５の外周部分には、シェアボルト４の頭部４１を押圧するための押圧部５１が設けられており、そこに設けられた凹部５２によって、シェアボルト４の頭部４１を被せるように押圧させられるようになっている。この凹部５２は、押圧部材５が回動しないようにするとともに、シェアボルト４の頭部４１を固定できるようにしたものであって、シェアボルト４の頭部４１よりも浅い深さ寸法となっている。そして、このような深さ寸法にすることによって、バネ３１でシェアボルト４を押圧できるようにしている。なお、このように押圧部５１でシェアボルト４を覆った場合、シェアボルト４が隠れてしまい、シェアボルト４が取り付けられているか否かを確認することができなくなる。そこで、ここでは、その凹部５２の中心に開口部５３を設け、シェアボルト４が取り付けられているか否かを確認できるようにしている。 The pressing member 5 is strongly pressed toward the front surface side of the transmission side rotating body 2 by an elastic body such as a spring 31 provided between the pressing member 5 and the flange portion 32 of the rotating shaft 3. Although the pressing member 5 is provided on the front surface side of the transmission side rotating body 2 here, the transmission side rotating body 2 and the driving side rotating body 1 are reversed, and the pressing member 5 is pressed on the front side of the driving side rotating body 1. 5 may be provided. A pressing portion 51 for pressing the head portion 41 of the shear bolt 4 is provided on the outer peripheral portion of the pressing member 5, and the recess portion 52 provided therein covers the head portion 41 of the shear bolt 4. It can be pressed against. The recess 52 prevents the pressing member 5 from rotating and allows the head 41 of the share bolt 4 to be fixed, and has a depth dimension shallower than the head 41 of the share bolt 4. ing. The shear bolt 4 can be pressed by the spring 31 with such a depth dimension. When the share bolt 4 is covered with the pressing portion 51 in this manner, the share bolt 4 is hidden and it becomes impossible to confirm whether or not the share bolt 4 is attached. Therefore, here, an opening 53 is provided at the center of the recess 52 so that whether or not the shear bolt 4 is attached can be confirmed.

この押圧部５１の外側には、この押圧部材５を操作させるためのレバー５４が設けられる。このレバー５４は、伝達側回転体２の表面との間に指を入れるための隙間を形成するものであって、そのレバー５４を手前側に引いて頭部４１と押圧部材５との間に隙間を形成し、その状態で、押圧部材５を回動させられるようになっている。 A lever 54 for operating the pressing member 5 is provided outside the pressing portion 51. This lever 54 forms a gap for inserting a finger between the lever 54 and the surface of the transmission side rotating body 2, and the lever 54 is pulled toward the front side to provide a space between the head 41 and the pressing member 5. A gap is formed, and the pressing member 5 can be rotated in this state.

次に、このように構成されたシェアボルト４の取付構造における作用について説明する。 Next, the operation of the mounting structure of the shear bolt 4 thus configured will be described.

まず、シェアボルト４を取り付ける場合、駆動側回転体１と伝達側回転体２の貫通穴１１、２１の位置合わせを行い、その状態でシェアボルト４を挿入する。このとき、押圧部材５の押圧部５１を貫通穴１１、２１の位置からずれるようにしておき、貫通穴１１、２１にシェアボルト４を挿入する。 First, when the shear bolt 4 is attached, the through holes 11 and 21 of the drive side rotary body 1 and the transmission side rotary body 2 are aligned, and the shear bolt 4 is inserted in that state. At this time, the pressing portion 51 of the pressing member 5 is displaced from the positions of the through holes 11 and 21, and the shear bolt 4 is inserted into the through holes 11 and 21.

そして、このようにシェアボルト４を挿入した後、押圧部材５のレバー５４を手前に引き、バネ３１の押圧力に抗してシェアボルト４の頭部４１が入るような隙間を形成する。 Then, after inserting the shear bolt 4 in this way, the lever 54 of the pressing member 5 is pulled toward the front to form a gap into which the head 41 of the shear bolt 4 is inserted against the pressing force of the spring 31.

そして、その状態で、押圧部材５のレバー５４を回動させ、押圧部５１の凹部５２がシェアボルト４の頭部４１を嵌め込む位置まで回動させる。そして、凹部５２の開口部５３を見ながら、シェアボルト４の頭部４１が凹部５２の中央位置にきた状態でレバー５４を離す。 Then, in this state, the lever 54 of the pressing member 5 is rotated so that the concave portion 52 of the pressing portion 51 is rotated to a position where the head portion 41 of the shear bolt 4 is fitted. Then, while looking at the opening 53 of the recess 52, the lever 54 is released while the head 41 of the shear bolt 4 is at the center of the recess 52.

このようにレバー５４を離すと、回動軸３に設けられたバネ３１の押圧力によって押圧部材５が表面側に押圧され、シェアボルト４の頭部４１を押圧させることができるようになる。 When the lever 54 is released in this way, the pressing member 5 is pressed toward the front side by the pressing force of the spring 31 provided on the rotating shaft 3, and the head 41 of the shear bolt 4 can be pressed.

これにより、シェアボルト４にナットを取り付けることなく、シェアボルト４を固定しておくことができるようになる。 As a result, the shear bolt 4 can be fixed without attaching the nut to the shear bolt 4.

このように上記実施の形態によれば、同一の回動軸３に設けられた駆動側回転体１と伝達側回転体２の外周面に設けられた貫通穴１１、２１に跨ってシェアボルト４を取り付けるようにしたシェアボルト４の取付構造において、前記回動軸３を中心として回動可能な押圧部材５を設け、当該押圧部材５を回動させてシェアボルト４の頭部４１を押圧させるようにしたので、駆動側回転体１などの外周面の面積が小さい場合であっても、押圧部材５を回動させてシェアボルト４の頭部４１を押圧させることができるようになる。また、貫通穴１１、２１を外周面の同一径上に設けることで、一つの押圧部材５で他の位置に挿入されたシェアボルト４の頭部４１を押圧させることができる。さらには、駆動側回転体１と同一軸上に押圧部材５を設けているため、駆動側回転体１などの重心が回動軸３から大きくずれるようなことがなくなる。 As described above, according to the above-described embodiment, the share bolt 4 straddles the through holes 11 and 21 provided on the outer peripheral surfaces of the driving-side rotating body 1 and the transmitting-side rotating body 2 provided on the same rotary shaft 3. In the mounting structure of the shear bolt 4 for mounting, a pressing member 5 rotatable about the rotating shaft 3 is provided, and the pressing member 5 is rotated to press the head 41 of the share bolt 4. Therefore, even when the area of the outer peripheral surface of the drive-side rotating body 1 or the like is small, the pressing member 5 can be rotated to press the head 41 of the shear bolt 4. Further, by providing the through holes 11 and 21 on the same diameter of the outer peripheral surface, it is possible to press the head portion 41 of the shear bolt 4 inserted at another position with one pressing member 5. Furthermore, since the pressing member 5 is provided on the same axis as the drive-side rotating body 1, the center of gravity of the drive-side rotating body 1 and the like does not largely deviate from the rotating shaft 3.

なお、本発明は上記実施の形態に限定されることなく、種々の態様で実施することができる。 The present invention is not limited to the above-mentioned embodiment, but can be implemented in various modes.

例えば、上記実施の形態では、押圧部材５に一箇所の押圧部５１を設けて、シェアボルト４を固定するようにしたが、図４に示すように、押圧部５１を複数設けるようにしておき、複数本のシェアボルト４を同時に取り付けられるようにしてもよい。そして、この複数の押圧部５１によって、同時にすべてのシェアボルト４の頭部４１を押圧できるようにしてもよい。なお、このようにシェアボルト４を複数箇所に取り付けて押圧する場合、押圧部材５を手前に引いて回動させる際に、すべてのシェアボルト４の頭部４１が同時に入る隙間を形成しなければならなくなる。そこで、押圧部材５を水平に引っ張り上げることができるように、レバー５４を回動軸３を中心に対して対称となる位置に設けるようにするとよい。このような位置にレバー５４を設ければ、それぞれのレバー５４を引っ張ることによって、押圧部材５を水平にしたまま引っ張り上げることができるようになり、シェアボルト４の頭部４１を同時に嵌め込むことができるようになる。また、このように対称となる位置に押圧部５１やレバー５４を設けることにより、押圧部材５の重心が回動軸３と一致し、回転時における振動などを防止することができるというメリットもある。 For example, in the above-described embodiment, the pressing member 5 is provided with the pressing portion 51 at one place and the shear bolt 4 is fixed. However, as shown in FIG. 4, a plurality of pressing portions 51 may be provided. Alternatively, a plurality of shear bolts 4 may be attached at the same time. Then, the heads 41 of all the shear bolts 4 may be simultaneously pressed by the plurality of pressing parts 51. When the shear bolts 4 are mounted at a plurality of positions and pressed in this way, a gap must be formed in which the heads 41 of all the shear bolts 4 are simultaneously inserted when the pressing member 5 is pulled forward and rotated. No longer. Therefore, the lever 54 may be provided at a position symmetrical with respect to the rotation shaft 3 so that the pressing member 5 can be pulled up horizontally. If the levers 54 are provided at such positions, by pulling each lever 54, it becomes possible to pull up the pressing member 5 while keeping the pressing member 5 horizontal, and the head 41 of the shear bolt 4 can be fitted at the same time. Will be able to. Further, by providing the pressing portion 51 and the lever 54 at such symmetrical positions, the center of gravity of the pressing member 5 coincides with the rotating shaft 3, and there is an advantage that vibration and the like during rotation can be prevented. ..

また、上記実施の形態では、回転体の同一半径上に貫通穴１１、２１を複数箇所設けてシェアボルト４を挿入できるようにしたが、異なる径の位置に貫通穴１１、２１を設けてシェアボルト４を取り付けるようにしてもよい。このとき、押圧部材５にもそれぞれの径に対応した押圧部５１を設けておき、シェアボルト４を押圧できるようにする。このように構成すれば、同じシェアボルト４を用いた場合であっても、径の異なる位置に挿入することで、破断できる負荷の状態を変えることができるようになる。 Further, in the above-described embodiment, the through holes 11 and 21 are provided at a plurality of locations on the same radius of the rotating body so that the share bolt 4 can be inserted. However, the through holes 11 and 21 are provided at different diameter positions, and the share bolts are shared. The bolt 4 may be attached. At this time, the pressing member 5 is also provided with a pressing portion 51 corresponding to each diameter so that the shear bolt 4 can be pressed. According to this structure, even if the same shear bolt 4 is used, it is possible to change the breakable load state by inserting the shear bolts 4 at different diameters.

また、上記実施の形態では、押圧部５１の凹部５２に開口部５３を設けるようにしたが、開口部５３を設けることなく、シェアボルト４を押圧させるようにしてもよい。 Further, in the above embodiment, the opening 53 is provided in the recess 52 of the pressing portion 51, but the shear bolt 4 may be pressed without providing the opening 53.

さらに、上記実施の形態では、押圧部材５を押圧する場合、回動軸３にバネ３１を設けて押圧させるようにしたが、ゴムを用いて押圧部材５を押圧させるようにしてもよい。 Further, in the above-described embodiment, when the pressing member 5 is pressed, the spring 31 is provided on the rotating shaft 3 to press the pressing member 5, but the pressing member 5 may be pressed using rubber.

また、上記実施の形態では、レバー５４を手前に引いて頭部４１を嵌め込むようにしたが、押圧部５１の側辺部分にシェアボルト４の頭部４１を滑らかに案内するための傾斜部を形成しておき、その傾斜部に頭部４１を接触させた状態で押圧部材５を回転させることによって、頭部４１を凹部５２の位置に嵌め込むようにしてもよい。 Further, in the above-described embodiment, the lever 54 is pulled toward the front to fit the head 41, but an inclined portion for smoothly guiding the head 41 of the shear bolt 4 to the side portion of the pressing portion 51. Alternatively, the head 41 may be fitted into the position of the recess 52 by rotating the pressing member 5 with the head 41 in contact with the inclined portion.

また、上記実施の形態では、伝達側回転体２を回転させて図示しないチェーンにより他の動作部に力を伝達させるようにしたが、この伝達側回転体２と回動軸３を一体的に回動させ、駆動側回転体１からの駆動力を伝達側回転体２を介して回動軸３側に伝達させて回動させるようにしてもよい。 Further, in the above-described embodiment, the transmission-side rotating body 2 is rotated and the force is transmitted to the other operating portion by the chain (not shown). However, the transmission-side rotating body 2 and the rotating shaft 3 are integrally formed. Alternatively, the driving force from the driving-side rotating body 1 may be transmitted to the rotating shaft 3 side via the transmitting-side rotating body 2 so as to be rotated.

本発明は、例えば、農業機械や除雪機、土木作業機や建設機などのような動力機において使用することができる。 INDUSTRIAL APPLICABILITY The present invention can be used in, for example, a power machine such as an agricultural machine, a snowplow, a civil engineering machine, a construction machine, or the like.

１・・・駆動側回転体
１１、２１・・・貫通穴
２・・・伝達側回転体
２１・・・貫通穴
３・・・回動軸
３１・・・バネ
３２・・・フランジ部
４・・・シェアボルト
４１・・・頭部
４２・・・軸部
５・・・押圧部材
５１・・・押圧部
５２・・・凹部
５３・・・開口部
５４・・・レバー DESCRIPTION OF SYMBOLS 1... Drive side rotating body 11, 21... Through hole 2... Transmission side rotating body 21... Through hole 3... Rotating shaft 31... Spring 32... Flange portion 4... ..Share bolt 41...head 42...shaft 5...pressing member 51...pressing portion 52...recess 53...opening 54...lever

Claims (6)

駆動側回転体と伝達側回転体を同一軸上に設け、当該駆動側回転体と伝達側回転体の外周面に設けられた貫通穴に跨ってシェアボルトを取り付けるようにしたシェアボルトの取付構造において、
前記同一軸を中心として回動可能な押圧部材を設け、
当該押圧部材を回動させてシェアボルトの頭部を押圧させるようにしたことを特徴とするシェアボルトの取付構造。 Shear bolt mounting structure in which the drive side rotating body and the transmission side rotating body are provided on the same axis, and the share bolt is attached across the through holes provided in the outer peripheral surfaces of the drive side rotating body and the transmission side rotating body. At
A pressing member rotatable about the same axis is provided,
A shear bolt mounting structure, characterized in that the pressing member is rotated to press the head of the shear bolt. 前記押圧部材が、前記同一軸に設けられた弾性体によって軸方向に押圧可能に設けられたものである請求項１に記載のシェアボルトの取付構造。 The shear bolt mounting structure according to claim 1, wherein the pressing member is provided so as to be axially pressed by an elastic body provided on the same shaft. 前記貫通穴が、前記同一軸に対して同一半径上に設けられたものである請求項１に記載のシェアボルトの取付構造。 The shear bolt mounting structure according to claim 1, wherein the through holes are provided on the same radius on the same axis. 前記押圧部材が、シェアボルトの頭部を被せる凹部を設けて構成されたものである請求項１に記載のシェアボルトの取付構造。 The shear bolt mounting structure according to claim 1, wherein the pressing member is configured by providing a recess for covering the head of the shear bolt. 前記凹部の中心に開口部を設けた請求項４に記載のシェアボルトの取付構造。 The shear bolt mounting structure according to claim 4, wherein an opening is provided at the center of the recess. 前記押圧部材が前記回転体の表面側に離間したレバーを設けてなるものである請求項１に記載のシェアボルトの取付構造。 The shear bolt mounting structure according to claim 1, wherein the pressing member is provided with a lever separated from the front surface of the rotating body.
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