TW202015863A - Tip tool - Google Patents

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Publication number
TW202015863A
TW202015863A TW108135337A TW108135337A TW202015863A TW 202015863 A TW202015863 A TW 202015863A TW 108135337 A TW108135337 A TW 108135337A TW 108135337 A TW108135337 A TW 108135337A TW 202015863 A TW202015863 A TW 202015863A
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Taiwan
Prior art keywords
end side
cross
tool
base end
shaft
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TW108135337A
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Chinese (zh)
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TWI717852B (en
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大西俊輔
中村鐵夫
今井大介
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日商京都機械工具股份有限公司
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Publication of TWI717852B publication Critical patent/TWI717852B/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0007—Connections or joints between tool parts

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

The object of the invention is to prevent a portion of rotating tool to be inserted into a mounting hole of shaft body, from breaking during the time of fastening operation. The solution means of the invention is a tip tool comprising a cylindrical socket 2 and a shaft body 4 having an insertion portion 50 to be inserted into the mounting hole 101 of the rotary tool 100. The insertion portion 50 comprises an engagement portion 51 that engages with the stopper 102 of the rotary tool 100. The cross-sectional shape of the distal end side portion 52 of the insertion portion 50 is configured as having a shape in contact with the inner peripheral surface of the mounting hole 101. The cross-sectional area of the proximal end side portion 53 of the insertion portion 50 is smaller than the cross-sectional area of the distal end side portion 52.

Description

前端工具Front-end tools

本發明屬於有關於裝設於旋轉工具之前端工具的技術領域。The invention belongs to the technical field of tools installed at the front end of a rotary tool.

以往已知有裝設於旋轉工具之前端工具。Conventionally, a tool installed at the front end of a rotary tool has been known.

專利文獻1中已揭示一種前端工具，係具有可連結於旋轉工具之連結軸部(軸體)、具有可嵌合於螺母等之接受口之軸座部、及連結軸座部之基端側與連結軸部之連結構件，該連結構件係以金屬筒體構成，在連結構件內部，於連結軸部的外周設置有掉落防止用擋環。Patent Document 1 discloses a tip tool having a connecting shaft portion (shaft body) that can be connected to a rotary tool, a shaft seat portion that has a receiving port that can be fitted into a nut, and the base end side of the connecting shaft seat portion The coupling member to the coupling shaft portion is formed of a metal cylinder, and inside the coupling member, a stop ring for preventing fall is provided on the outer periphery of the coupling shaft portion.

專利文獻1之連結軸部設置有環狀凹部，該環狀凹部適合於阻擋用鋼球，該制動用鋼球係在***旋轉工具之裝設孔部時，一次即能夠連結固定。The connecting shaft portion of Patent Document 1 is provided with an annular recessed portion, which is suitable for a blocking steel ball. When the braking steel ball is inserted into an installation hole of a rotary tool, it can be connected and fixed once.

專利文獻1：日本特開2012-143855號公報。Patent Document 1: Japanese Patent Application Publication No. 2012-143855.

－發明欲解決之技術問題－－Technical problems to be solved by invention－

又，專利文獻1所記載之前端工具中，於裝設孔***有軸體中較環狀凹部靠軸座側之部分(以下稱為前端側部)、及較環狀凹部靠反軸座側之部分(以下稱為基端側部)兩者。In addition, in the front end tool described in Patent Document 1, a portion of the shaft body that is closer to the shaft seat side than the annular recessed portion (hereinafter referred to as the front end side portion) in the installation hole is inserted, and a side that is closer to the reverse shaft seat than the annular recessed portion Part (hereinafter referred to as the base side).

本發明人等努力檢討發現，前端側部之橫剖面積與基端側部之橫剖面積相同時，相較於前端側部，基端側部與裝設孔的接觸面積會變大。相較於前端側部，基端側部與裝設孔的接觸面積較大時，旋轉工具的旋轉力主要會輸入至基端側部。裝設孔之內周面與基端側部之間稍有間隙，故軸體受旋轉工具之作用而旋轉時，會稍微產生搖動。產生於該基端側部之搖動越離開基端側部會越大。結果，裝設孔的前端部分被迫擴大，裝設孔的前端變大。The inventors of the present inventors tried to find out that when the cross-sectional area of the front end side is the same as the cross-sectional area of the base end side, the contact area between the base end side and the mounting hole becomes larger than that of the front end side. Compared with the front end side, when the contact area between the base end side and the mounting hole is large, the rotational force of the rotary tool is mainly input to the base end side. There is a slight gap between the inner peripheral surface of the installation hole and the base end side part, so the shaft body will slightly shake when it is rotated by the rotation tool. The shaking generated on the side of the base end increases as it moves away from the side of the base end. As a result, the front end portion of the installation hole is forced to expand, and the front end of the installation hole becomes larger.

若裝設孔的前端變大，則來自旋轉工具的旋轉力難以施加於前端側部。因此，於裝設孔的前端已變大之狀態下緊固螺母等時，來自螺母等的與上述旋轉力方向相反的反作用力容易透過軸座部施加於前端側部。另一方面，裝設孔之基端部分其經年劣化所致變形較小，故旋轉工具的上述旋轉力會施加於基端側部。結果會於軸體中環狀凹部之部分產生扭轉應力，在該環狀凹部之部分有軸體破裂之虞。If the front end of the mounting hole becomes larger, it is difficult to apply the rotational force from the rotary tool to the side of the front end. Therefore, when a nut or the like is tightened in a state where the front end of the mounting hole has become large, a reaction force from the nut or the like in the direction opposite to the above-mentioned rotational force is easily applied to the front end side portion through the shaft seat portion. On the other hand, the base end portion of the mounting hole is less deformed due to deterioration over time, so the above-mentioned rotation force of the rotary tool is applied to the base end side portion. As a result, torsional stress will be generated in the portion of the annular recess in the shaft body, and the shaft body may break in the portion of the annular recess.

本發明係鑑於上述問題點而研究者，其目的在：抑制於***於軸體中的旋轉工具之裝設孔之部分在緊固作業時破裂。The present invention has been made in consideration of the above-mentioned problems, and its object is to suppress the part of the installation hole of the rotary tool inserted in the shaft body from breaking during the tightening operation.

－用於解決技術問題之技術手段－－Technical means for solving technical problems－

為了解決上述問題，本發明係以裝設於旋轉工具之前端工具為對象，其構成為：具備筒狀軸座及軸體，該軸體係結合於上述軸座，並具有***上述旋轉工具之裝設孔之***部，於上述旋轉工具之裝設孔內設置有擋件，上述擋件係抑制上述***部從該裝設孔脫落，上述***部係具有與上述擋件卡合之卡合部，上述***部中，以較上述卡合部靠上述軸座側之部分為前端側部，以較上述卡合部靠上述反軸座側之部分為基端側部，上述前端側部之橫剖面形狀為與上述裝設孔之橫剖面形狀相似且與上述裝設孔之內周面相接之形狀，上述基端側部之橫剖面積小於上述前端側部之橫剖面積。In order to solve the above-mentioned problems, the present invention is directed to a tool installed at the front end of a rotary tool, which is composed of: a cylindrical shaft seat and a shaft body; the shaft system is coupled to the shaft seat; An insertion portion provided with a hole is provided with a stopper in the installation hole of the rotary tool, the stopper prevents the insertion portion from falling out of the installation hole, and the insertion portion has an engagement portion that engages with the stopper In the insertion portion, a portion closer to the shaft seat side than the engaging portion is a front end side portion, and a portion closer to the counter shaft seat side than the engaging portion is a base end side portion, and the front end side portion is horizontal The cross-sectional shape is a shape similar to the cross-sectional shape of the installation hole and in contact with the inner circumferential surface of the installation hole, and the cross-sectional area of the base end side portion is smaller than the cross-sectional area of the front end side portion.

根據該構成，前端側部之橫剖面形狀為與裝設孔之橫剖面形狀相似且與裝設孔之內周面相接之形狀，故旋轉工具的旋轉力適當輸入至前端側部。又，基端側部之橫剖面積小於前端側部之橫剖面積。藉此，相較於前端側部，基端側部難以與裝設孔之內周面接觸。因此，旋轉工具的旋轉力難以施加於基端側部，旋轉工具的旋轉力主要傳達至前端側部。結果，即使裝設孔的前端增大，施加於卡合部的扭轉應力也會變小。因此，可抑制緊固作業時***部之破裂。According to this configuration, the cross-sectional shape of the front end side portion is similar to the cross-sectional shape of the installation hole and is in contact with the inner peripheral surface of the installation hole, so the rotational force of the rotary tool is appropriately input to the front end side portion. Moreover, the cross-sectional area of the base end side portion is smaller than the cross-sectional area of the front end side portion. By this, compared with the front end side portion, the base end side portion is difficult to contact with the inner peripheral surface of the installation hole. Therefore, it is difficult to apply the rotating force of the rotating tool to the base end side, and the rotating force of the rotating tool is mainly transmitted to the front end side. As a result, even if the front end of the mounting hole is increased, the torsional stress applied to the engaging portion becomes smaller. Therefore, the breakage of the insertion portion during the tightening operation can be suppressed.

上述前端工具之一實施方式中，上述基端側部之橫剖面形狀為圓形。In one embodiment of the tip tool, the base end side portion has a circular cross-sectional shape.

根據該構成，基端側部與裝設孔之內周面接觸時，基端側部與裝設孔之內周面為點接觸或線接觸。因此，可盡可能縮小基端側部與裝設孔之內周面的接觸面積。藉此，可更有效抑制緊固作業時***部之破裂。According to this configuration, when the proximal end side portion contacts the inner circumferential surface of the installation hole, the proximal end side portion and the inner circumferential surface of the installation hole are in point contact or line contact. Therefore, the contact area between the base end side portion and the inner peripheral surface of the installation hole can be reduced as much as possible. This can more effectively suppress the breakage of the insertion portion during the tightening operation.

上述前端工具之其他實施方式中，上述前端側部之橫剖面形狀為多邊形狀，上述基端側部之橫剖面形狀為邊數多於上述前端側部之多邊形狀。In another embodiment of the front end tool, the cross-sectional shape of the front end side portion is polygonal, and the cross-sectional shape of the proximal end side portion is a polygonal shape having more sides than the front end side portion.

根據該構成，即使基端側部與裝設孔之內周面接觸，也可盡可能縮小接觸面積。藉此，可更有效抑制緊固作業時***部之破裂。According to this configuration, even if the base end side portion contacts the inner peripheral surface of the installation hole, the contact area can be reduced as much as possible. This can more effectively suppress the breakage of the insertion portion during the tightening operation.

上述前端工具可為以下構成：上述軸體係具有與上述軸座重複之重複部，上述重複部設置有脆弱部，上述脆弱部比上述***部之上述卡合部更細。The front-end tool may be configured such that the shaft system has a repeating portion that repeats with the shaft seat, the repeating portion is provided with a weak portion, and the weak portion is thinner than the engaging portion of the insertion portion.

根據該構成，在***部卡合部位置破裂前，脆弱部會先破裂，藉此可抑制扭轉應力施加於卡合部。藉此，可更有效抑制***部之破裂。According to this configuration, before the position of the engaging portion of the insertion portion is broken, the fragile portion is broken first, thereby suppressing the application of torsional stress to the engaging portion. This can more effectively suppress the breakage of the insertion portion.

軸體具有脆弱部之前端工具可為以下構成：上述軸座係具有貫通孔，該貫通孔係供上述軸體中較上述脆弱部靠上述***部側之部分穿過，上述重複部係位於上述脆弱部與上述貫通孔之間，且具有直徑大於上述貫通孔之台階部。The front tool of the shaft body having the fragile portion may be configured as follows: the shaft seat has a through-hole for passing through a portion of the shaft body closer to the insertion portion side than the fragile portion, and the repeating portion is located above Between the weak portion and the through-hole, there is a stepped portion having a diameter larger than the through-hole.

根據該構成，軸體在脆弱部破裂時且軸體要從軸座脫落時，台階部會卡於貫通孔，藉此使軸體不會由軸座脫落。藉此，即使軸體破裂時也能夠防止軸座掉落。According to this configuration, when the shaft body is broken and the shaft body is to be detached from the shaft seat, the stepped portion is caught in the through hole, thereby preventing the shaft body from being detached from the shaft seat. Thereby, the shaft seat can be prevented from falling even when the shaft body is broken.

－發明之效果－－Effect of invention－

如以上說明，根據本發明之前端工具，基端側部難以與裝設孔之內周面接觸，旋轉工具的旋轉力難以施加於基端側部。藉此，旋轉工具的旋轉力主要傳達至前端側部，故可抑制緊固作業時***部之破裂。As described above, according to the front end tool of the present invention, the base end side portion is difficult to contact the inner peripheral surface of the installation hole, and the rotational force of the rotary tool is hardly applied to the base end side portion. As a result, the rotational force of the rotary tool is mainly transmitted to the front end side portion, so that the breakage of the insertion portion during the tightening operation can be suppressed.

以下根據圖式詳細說明本發明的實施方式。Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

（第一實施方式）(First embodiment)

圖1表示本第一實施方式之前端工具1。該前端工具1係裝設於旋轉工具100之工具。旋轉工具100包括手動式及電動式，例如有棘輪板手或氣動扳手等。FIG. 1 shows the front end tool 1 of the first embodiment. The front-end tool 1 is a tool installed on the rotary tool 100. The rotating tool 100 includes a manual type and an electric type, such as a ratchet wrench or an air wrench.

前端工具1係具備筒狀軸座(socket)2、及藉由壓入而結合於軸座2之長條狀軸體4。如圖1所示，軸體4係由軸座2之軸心方向一端往該軸心方向一側延伸。本第一實施方式中，軸座2係作用於螺栓或螺母之部分，軸體4係裝設於旋轉工具100之部分。以下說明中，上述軸心方向之上述一側稱為基端側，上述軸心方向之另一側稱為前端側。The front-end tool 1 is provided with a cylindrical socket 2 and a long shaft 4 which is coupled to the shaft 2 by press-fitting. As shown in FIG. 1, the shaft body 4 extends from one end of the shaft base 2 in the axial center direction to one side in the axial center direction. In the first embodiment, the shaft seat 2 acts on the part of the bolt or nut, and the shaft body 4 is installed on the part of the rotary tool 100. In the following description, the one side in the axial direction is referred to as the base end side, and the other side in the axial direction is referred to as the front end side.

如圖1所示，軸座2形成為略圓筒狀。詳細而言，軸座2係具有：相對而言外徑較大之第一圓筒部21、直徑由第一圓筒部21之軸心方向之基端部往該軸心方向之上述基端側縮小且延伸之縮徑部22、及由縮徑部22之軸心方向之基端部往上述基端側延伸之第二圓筒部23。第一圓筒部21、縮徑部22及第二圓筒部23為同軸。軸座2係以金屬構成。As shown in FIG. 1, the shaft base 2 is formed in a substantially cylindrical shape. In detail, the shaft base 2 has a first cylindrical portion 21 having a relatively large outer diameter, and a diameter from the base end portion of the first cylindrical portion 21 in the axial center direction to the base end in the axial center direction The reduced-diameter portion 22 that is narrowed and extended on the side, and the second cylindrical portion 23 that extends from the proximal end portion of the reduced-diameter portion 22 in the axial direction toward the proximal end side. The first cylindrical portion 21, the reduced diameter portion 22, and the second cylindrical portion 23 are coaxial. The shaft base 2 is made of metal.

軸座2之筒內形成有：壓入軸體4之被壓入部31；及作用部24，係與以旋轉工具100旋轉之零件(螺栓或螺母)嵌合並作用於該零件。作用部24形成為與螺栓或螺母一致之形狀，例如形成為剖面六邊形。The cylinder of the shaft seat 2 is formed with: a pressed portion 31 which is pressed into the shaft body 4; and an action portion 24, which is fitted with a part (bolt or nut) rotated by the rotary tool 100 and acts on the part. The action portion 24 is formed in a shape corresponding to a bolt or a nut, for example, formed in a hexagonal cross section.

軸座2之筒內中，在相對於被壓入部31與作用部24相反側設置有導引部32，該導引部32的直徑小於被壓入部31。在軸體4由作用部24側***軸座2時，該導引部32係沿著軸座2之軸心方向導引軸體4之部分。再者，導引部32相當於貫通孔，該貫通孔係供軸體4中較後述脆弱部46靠後述***部50側之部分穿過。In the cylinder of the shaft seat 2, a guide portion 32 is provided on the side opposite to the acting portion 24 with respect to the pressed portion 31, and the diameter of the guide portion 32 is smaller than the pressed portion 31. When the shaft body 4 is inserted into the shaft seat 2 from the action portion 24 side, the guide portion 32 guides the portion of the shaft body 4 along the axis of the shaft seat 2. In addition, the guide portion 32 corresponds to a through-hole through which a portion of the shaft body 4 closer to the insertion portion 50 side to be described later than the fragile portion 46 to be described later.

被壓入部31之直徑比軸體4之後述結合部42之對角間距離更短，且比對面間距離更長。又，被壓入部31之直徑大於軸體4之軸部41之對角間距離。導引部32之直徑稍大於軸體4之軸部41之對角間距離。The diameter of the pressed portion 31 is shorter than the diagonal distance between the coupling portions 42 described later, and is longer than the distance between the opposite surfaces. In addition, the diameter of the pressed portion 31 is larger than the diagonal distance between the shaft portions 41 of the shaft body 4. The diameter of the guide portion 32 is slightly larger than the diagonal distance between the shaft portions 41 of the shaft body 4.

軸體4係以剛性高於軸座2之金屬構成。軸體4係具有：軸部41；結合部42，係形成於軸部41之一端部，且與軸座2結合；***部50，係形成於軸部41之另一端部，並***於旋轉工具100之裝設孔101。結合部42形成為剖面六邊形狀。結合部42之橫剖面積大於軸部41之橫剖面積。The shaft body 4 is made of metal having a higher rigidity than the shaft seat 2. The shaft body 4 has: a shaft portion 41; a coupling portion 42 formed at one end of the shaft portion 41 and coupled to the shaft base 2; an insertion portion 50 formed at the other end of the shaft portion 41 and inserted in the rotation The mounting hole 101 of the tool 100. The coupling portion 42 is formed in a hexagonal shape in cross section. The cross-sectional area of the coupling portion 42 is larger than the cross-sectional area of the shaft portion 41.

軸部41中，較結合部42靠上述軸心方向之上述基端側之一部分成為重複部43，該重複部43係在徑方向與軸座2重複。In the shaft portion 41, a portion of the base end side closer to the shaft center direction than the coupling portion 42 becomes a repeating portion 43, and the repeating portion 43 overlaps the shaft seat 2 in the radial direction.

如圖1所示，重複部43具有：脆弱部46，係比軸體4之其他部分更細；及台階部47，係形成於較該脆弱部46靠上述軸心方向之上述基端側。台階部47之直徑小於被壓入部31之直徑，且大於導引部32之直徑。脆弱部46相較於軸體4之其他部分更為脆弱，藉此，使用前端工具1進行螺母等緊固作業時，在軸體4破裂時，容易在脆弱部46位置破裂。As shown in FIG. 1, the repeating portion 43 has a fragile portion 46 that is thinner than other parts of the shaft body 4, and a stepped portion 47 that is formed on the proximal end side of the fragile portion 46 in the axial direction. The diameter of the step portion 47 is smaller than the diameter of the pressed portion 31 and larger than the diameter of the guide portion 32. The fragile portion 46 is more fragile than other parts of the shaft body 4, and therefore, when the front tool 1 is used to tighten a nut or the like, when the shaft body 4 is broken, the fragile portion 46 is easily broken.

軸體4之***部50係具有卡合部51，該卡合部51係與擋件(stopper)102卡合，該擋件102係裝設於旋轉工具100之裝設孔101內。卡合部51係具有削切為環狀之卡合槽51a。卡合部51係比***部50中的其他部分更細。卡合部51係比脆弱部更粗。The insertion portion 50 of the shaft body 4 has an engaging portion 51 that is engaged with a stopper 102 that is installed in the installation hole 101 of the rotary tool 100. The engaging portion 51 has an engaging groove 51a cut into a ring shape. The engaging portion 51 is thinner than other parts of the insertion portion 50. The engaging portion 51 is thicker than the fragile portion.

旋轉工具100之擋件102為用以抑制***部50從裝設孔101脫落之裝置。擋件102係具有鋼球及螺旋彈簧，該螺旋彈簧係朝著裝設孔101之中心軸對該鋼球施力。在***部50已***裝設孔101之狀態下，上述鋼球係藉由上述螺旋彈簧的作用力而往裝設孔101之中心軸移動，並與卡合部51之卡合槽51a卡合。藉此可抑制***部50從裝設孔101脫落。The stopper 102 of the rotary tool 100 is a device for preventing the insertion portion 50 from falling out of the installation hole 101. The stopper 102 has a steel ball and a coil spring that urges the steel ball toward the central axis of the mounting hole 101. In a state where the insertion portion 50 has been inserted into the installation hole 101, the steel ball moves to the central axis of the installation hole 101 by the urging force of the coil spring and engages with the engagement groove 51a of the engagement portion 51 . This can prevent the insertion portion 50 from falling out of the installation hole 101.

本第一實施方式中，***部50中，較卡合部51靠軸座2側(上述軸心方向之上述前端側)之部分(以下稱為前端側部52)與較卡合部51靠與軸座2相反側(上述軸心方向之上述基端側)之部分(以下稱為基端側部53)兩者形狀相異。In the first embodiment, in the insertion portion 50, the portion closer to the shaft seat 2 side (the front end side in the axial direction) of the engaging portion 51 (hereinafter referred to as the front end side portion 52) is closer to the engaging portion 51. The part opposite to the shaft seat 2 (the base end side in the axial center direction) (hereinafter referred to as the base end side portion 53) has different shapes.

如圖2所示，前端側部52的橫剖面形狀係與裝設孔101之橫剖面形狀相似，且與裝設孔101之內周面相接。詳細而言，裝設孔101形成為剖面六邊形狀，前端側部52亦形成為剖面六邊形狀。亦即，前端側部52為六棱柱狀。前端側部52之橫剖面積稍微小於裝設孔101之橫剖面積。藉此，在***部50***於裝設孔101之狀態下，前端側部52之表面容易與裝設孔101之內周面進行面接觸。結果，旋轉工具100旋轉時，旋轉工具100的旋轉力會適當施加於前端側部52。As shown in FIG. 2, the cross-sectional shape of the front end side portion 52 is similar to the cross-sectional shape of the installation hole 101 and is in contact with the inner circumferential surface of the installation hole 101. In detail, the mounting hole 101 is formed in a hexagonal shape in cross section, and the tip side portion 52 is also formed in a hexagonal shape in cross section. That is, the tip side portion 52 has a hexagonal column shape. The cross-sectional area of the front end side portion 52 is slightly smaller than the cross-sectional area of the installation hole 101. Thereby, in a state where the insertion portion 50 is inserted into the installation hole 101, the surface of the front end side portion 52 is easily in surface contact with the inner circumferential surface of the installation hole 101. As a result, when the rotating tool 100 rotates, the rotating force of the rotating tool 100 is appropriately applied to the front end side portion 52.

如圖3所示，基端側部53之橫剖面形狀形成為圓形。亦即，基端側部53為圓柱狀。基端側部53之橫剖面形狀之直徑比裝設孔101之對面間距離更短。如圖2及圖3所示，基端側部53之橫剖面積係大於卡合部51之橫剖面積之最小值，且小於前端側部52之橫剖面積。藉此，在***部50已***裝設孔101之狀態下，基端側部53之表面與裝設孔101之內周面接觸時，基端側部53之表面係與裝設孔101之內周面為點接觸或線接觸。因此，旋轉工具100旋轉時，旋轉工具100的旋轉力難以輸入於基端側部53。再者，基端側部53之橫剖面形狀之直徑只要使橫剖面積大於卡合部51之橫剖面積之最小值，且小於前端側部52之橫剖面積，則無特別限定。As shown in FIG. 3, the base end side portion 53 has a circular cross-sectional shape. That is, the base end side portion 53 is cylindrical. The diameter of the cross-sectional shape of the base end side portion 53 is shorter than the distance between the opposite surfaces of the installation hole 101. As shown in FIGS. 2 and 3, the cross-sectional area of the base end side portion 53 is larger than the minimum value of the cross-sectional area of the engaging portion 51 and smaller than the cross-sectional area of the front end side portion 52. With this, when the surface of the base end side portion 53 is in contact with the inner peripheral surface of the installation hole 101 in a state where the insertion portion 50 has been inserted into the installation hole 101, the surface of the base end side portion 53 is in contact with the installation hole 101 The inner peripheral surface is point contact or line contact. Therefore, when the rotary tool 100 rotates, it is difficult for the rotational force of the rotary tool 100 to be input to the proximal side 53. In addition, the diameter of the cross-sectional shape of the base end side portion 53 is not particularly limited as long as the cross-sectional area is larger than the minimum value of the cross-sectional area of the engaging portion 51 and smaller than the cross-sectional area of the front end side portion 52.

本第一實施方式中，前端工具1為以下方式所構成：以使軸部41插通導引部32之方式，由軸座2的作用部24側將軸體4***於該軸座2內，並使結合部42壓入固定於被壓入部21。In the first embodiment, the tip tool 1 is configured such that the shaft body 4 is inserted into the shaft seat 2 from the acting portion 24 side of the shaft seat 2 so that the shaft portion 41 is inserted through the guide portion 32. , And the coupling portion 42 is press-fitted and fixed to the pressed portion 21.

在此，本申請發明人等努力檢討發現：假設前端側部52之橫剖面積與基端側部53之橫剖面積相同時，相較於前端側部52，基端側部53與裝設孔101的接觸面積會變大。相較於前端側部52，基端側部53與裝設孔101的接觸面積較大時，旋轉工具100的旋轉力主要會輸入至基端側部53。為了使***部50之***更順利，一般在裝設孔100之內周面與基端側部53之間稍微有間隙。因此，以旋轉工具100旋轉軸體4時會稍微產生搖動。該基端側部53產生之搖動越離開基端側部53會越大。結果，裝設孔101的前端部分被迫擴大，裝設孔101的前端變大。Here, the inventors of the present application made an effort to review and found that, assuming that the cross-sectional area of the front end side portion 52 is the same as the cross-sectional area of the base end side portion 53, the base end side portion 53 and the installation The contact area of the hole 101 becomes larger. When the contact area between the proximal end portion 53 and the mounting hole 101 is larger than the distal end portion 52, the rotational force of the rotary tool 100 is mainly input to the proximal end portion 53. In order to make the insertion of the insertion portion 50 smoother, there is generally a slight gap between the inner peripheral surface of the installation hole 100 and the base end side portion 53. Therefore, when the shaft body 4 is rotated by the rotating tool 100, it will slightly shake. The shaking of the base end side 53 increases as it moves away from the base end side 53. As a result, the front end portion of the installation hole 101 is forced to expand, and the front end of the installation hole 101 becomes larger.

若旋轉工具100之裝設孔101前端部分變大，則旋轉工具100的旋轉力難以施加於前端側部52。因此，在裝設孔101的前端部分已變大之狀態下緊固螺母等時，來自螺母等的與上述旋轉力方向相反的反作用力容易透過軸座2而施加於前端側部52。另一方面，裝設孔101之基端部分其經年劣化所致變形較小，故旋轉工具100的上述旋轉力會施加於基端側部53。結果，在軸體4中的卡合部51產生扭轉應力，有在卡合部51中軸體4破裂之虞。If the front end portion of the installation hole 101 of the rotary tool 100 becomes larger, it is difficult for the rotational force of the rotary tool 100 to be applied to the front end side portion 52. Therefore, when a nut or the like is tightened in a state where the front end portion of the mounting hole 101 has become large, a reaction force from the nut or the like opposite to the direction of the rotational force described above is easily applied to the front end side portion 52 through the shaft seat 2. On the other hand, the base end portion of the mounting hole 101 is less deformed due to deterioration over time, so the above-mentioned rotation force of the rotary tool 100 is applied to the base end side portion 53. As a result, a torsional stress is generated in the engaging portion 51 of the shaft body 4, and the shaft body 4 may break in the engaging portion 51.

對此，本第一實施方式中，前端側部52之橫剖面形狀係與裝設孔101之橫剖面形狀相似，另一方面，基端側部53之橫剖面積小於前端側部52之橫剖面積。藉此，相較於前端側部52，基端側部53難以與裝設孔101之內周面接觸。因此，旋轉工具100的旋轉力難以施加於基端側部53。藉此，旋轉工具100的旋轉力主要傳達至前端側部53。結果，即使裝設孔101的前端部分變大，施加於卡合部51之扭轉應力也會減小。因此，可抑制緊固作業時***部50之破裂。In this regard, in the first embodiment, the cross-sectional shape of the front end side portion 52 is similar to the cross-sectional shape of the mounting hole 101. On the other hand, the cross-sectional area of the base end side portion 53 is smaller than that of the front end side portion 52 Section area. This makes it difficult for the base end side portion 53 to contact the inner peripheral surface of the installation hole 101 compared to the front end side portion 52. Therefore, it is difficult for the rotational force of the rotary tool 100 to be applied to the base end side 53. As a result, the rotational force of the rotary tool 100 is mainly transmitted to the front end side 53. As a result, even if the front end portion of the mounting hole 101 becomes larger, the torsional stress applied to the engaging portion 51 is reduced. Therefore, the breakage of the insertion portion 50 during the tightening operation can be suppressed.

尤其，本第一實施方式中，基端側部52之橫剖面形狀為圓形。藉此，即使基端側部53與裝設孔101之內周面接觸，基端側部53與裝設孔101之內周面為點接觸或線接觸。因此，可盡可能減少基端側部52與裝設孔101之內周面的接觸面積。藉此，旋轉工具100的旋轉力難以施加於基端側部53。結果，可更有效抑制緊固作業時***部50之破裂。In particular, in the first embodiment, the base end side portion 52 has a circular cross-sectional shape. Thereby, even if the base end side portion 53 contacts the inner peripheral surface of the installation hole 101, the base end side portion 53 and the inner peripheral surface of the installation hole 101 are in point contact or line contact. Therefore, the contact area between the base end side portion 52 and the inner peripheral surface of the installation hole 101 can be reduced as much as possible. With this, it is difficult for the rotational force of the rotary tool 100 to be applied to the base end side portion 53. As a result, the breakage of the insertion portion 50 during the tightening operation can be more effectively suppressed.

又，本第一實施方式中，在軸體4之重複部43設置有脆弱部46。藉此，在***部50破裂前，軸體4會先在脆弱部46破裂，會抑制在卡合部51產生扭轉應力，藉此可更有效抑制***部50之破裂。In addition, in the first embodiment, the repetitive portion 43 of the shaft body 4 is provided with a fragile portion 46. Thereby, before the insertion portion 50 is broken, the shaft body 4 will first break at the fragile portion 46 to suppress the generation of torsional stress at the engaging portion 51, thereby more effectively suppressing the breakage of the insertion portion 50.

又，軸體4在脆弱部46破裂時且軸體4要從軸座2脫落時，台階部47會卡於導引部32，藉此使軸體4不會由軸座2脫落。藉此可防止軸體4破裂時軸座2掉落。In addition, when the shaft body 4 is ruptured and the shaft body 4 is to be detached from the shaft seat 2, the stepped portion 47 will be caught by the guide portion 32, thereby preventing the shaft body 4 from being detached from the shaft seat 2. Thereby, the shaft seat 2 can be prevented from falling when the shaft body 4 is broken.

圖4表示本第一實施方式之變形例。該變形例中，軸體104不具有脆弱部46及台階部47。該構成中，前端側部52之橫剖面形狀係與裝設孔101之橫剖面形狀相似，基端側部53之橫剖面積小於前端側部52之橫剖面積，故可抑制緊固作業時***部50之破裂。FIG. 4 shows a modification of the first embodiment. In this modification, the shaft body 104 does not have the fragile portion 46 and the step portion 47. In this configuration, the cross-sectional shape of the front end side portion 52 is similar to the cross-sectional shape of the mounting hole 101, and the cross-sectional area of the base end side portion 53 is smaller than the cross-sectional area of the front end side portion 52, so that the tightening operation can be suppressed The insertion part 50 is broken.

（第二實施方式）(Second embodiment)

以下參照圖面詳細說明第二實施方式。再者，以下說明中與第一實施方式共通之部分係附上相同符號並詳細省略說明。The second embodiment will be described in detail below with reference to the drawings. In addition, in the following description, parts common to the first embodiment are denoted by the same symbols, and the description is omitted in detail.

本第二實施方式中，針對軸體204而言，基端側部253之橫剖面形狀與上述第一實施方式相異。詳細而言，如圖5及圖6所示，基端側部253之橫剖面形狀形成為邊數多於前端側部52之多邊形狀。更具體而言，基端側部253之橫剖面形狀形成為十二邊形。亦即，本第二實施方式中，基端側部253為十二棱柱狀。又，本第二實施方式中，軸體204係與上述第一實施方式之變形例同樣地不具有脆弱部46及台階部47。再者，基端側部253之橫剖面形狀無需為正十二邊形，且相鄰接角部之內角大小可相異。In the second embodiment, the shaft body 204 has a different lateral cross-sectional shape from the base end side 253 than in the first embodiment described above. In detail, as shown in FIGS. 5 and 6, the cross-sectional shape of the base end side portion 253 is formed into a polygonal shape with more sides than the front end side portion 52. More specifically, the cross-sectional shape of the base end side portion 253 is formed into a dodecagon shape. That is, in the second embodiment, the base end side portion 253 has a twelve prismatic shape. In addition, in the second embodiment, the shaft body 204 does not have the fragile portion 46 and the step portion 47 as in the modification of the first embodiment described above. Furthermore, the cross-sectional shape of the base side portion 253 does not need to be a regular twelve-sided shape, and the size of the inner angle of adjacent corner portions may be different.

本第二實施方式之構成亦可盡可能減少接觸面積。因此，本第二實施方式之構成中，可抑制緊固作業時***部250之破裂。The configuration of the second embodiment can also reduce the contact area as much as possible. Therefore, in the configuration of the second embodiment, the breakage of the insertion portion 250 during the tightening operation can be suppressed.

（第三實施方式）(Third embodiment)

以下參照圖面詳細說明第三實施方式。再者，以下說明中，與第一及第二實施方式共通之部分係附以相同符號並詳細省略說明。The third embodiment will be described in detail below with reference to the drawings. In addition, in the following description, the parts common to the first and second embodiments are denoted by the same symbols, and the description is omitted in detail.

本第三實施方式中，針對軸體304而言，卡合部351之構成係與上述第一實施方式及2相異。基端側部53與上述第一實施方式為相同構成。又，本第三實施方式中，軸體304係與上述第一實施方式之變形例同樣地不具有脆弱部46及台階部47。In the third embodiment, the configuration of the engaging portion 351 is different from the first embodiment and the second embodiment described above for the shaft body 304. The base end side portion 53 has the same structure as the first embodiment described above. In addition, in the third embodiment, the shaft body 304 does not have the fragile portion 46 and the step portion 47 as in the modification of the first embodiment described above.

本第三實施方式中，如圖7所示，卡合部351係具有球面狀的六個卡合凹部351a。六個卡合凹部351a分別形成於六邊形的邊部分。當***部350已***裝設孔101時，擋件102之鋼球102b會卡合於卡合凹部351a內。In the third embodiment, as shown in FIG. 7, the engaging portion 351 has six spherical engaging recesses 351a. The six engagement recesses 351a are respectively formed in the side portions of the hexagon. When the insertion portion 350 has been inserted into the installation hole 101, the steel ball 102b of the stopper 102 will be engaged in the engaging recess 351a.

相較於設置卡合槽的情形，本第三實施方式可盡可能增加卡合部351之橫剖面積之最小值。因此，相較於設置卡合槽的情形，可提高卡合部351之剛性。藉此，可進一步有效抑制***部350之破裂。Compared with the case where the engaging groove is provided, the third embodiment can increase the minimum value of the cross-sectional area of the engaging portion 351 as much as possible. Therefore, compared with the case where the engaging groove is provided, the rigidity of the engaging portion 351 can be improved. As a result, the breakage of the insertion portion 350 can be further effectively suppressed.

（其它實施方式）(Other embodiments)

本發明並不限定於上述實施方式，可在不超出申請專利範圍主旨之範圍進行變更。The present invention is not limited to the above-mentioned embodiment, and can be modified within the scope not exceeding the scope of the patent application.

例如上述第一至第三實施方式中，軸體4、204、304係從軸座2的作用部24側***，並使結合部42壓入於被壓入部31。但不限定於此，若為在軸體未設置脆弱部及台階部之構成，則軸體4、204、304之結合部42可從軸座2中與作用部24相反側(上述軸心方向之上述基端側)壓入於被壓入部31。此時，無需於軸座2設置導引部32，被壓入部31可延伸至軸座2之上述軸心方向之基端。For example, in the first to third embodiments described above, the shaft bodies 4, 204, and 304 are inserted from the acting portion 24 side of the shaft seat 2, and the coupling portion 42 is pressed into the pressed portion 31. However, it is not limited to this. If the shaft body is not provided with a fragile portion and a stepped portion, the coupling portion 42 of the shaft body 4, 204, 304 can be from the side of the shaft seat 2 opposite to the action portion 24 (the above-mentioned axis direction) The proximal end side is pressed into the pressed portion 31. At this time, there is no need to provide the guide portion 32 on the shaft seat 2, and the pressed portion 31 can extend to the base end of the shaft seat 2 in the above-mentioned axial center direction.

又，可使第二實施方式之卡合部51形成為如上述第三實施方式之卡合部351之形狀。In addition, the engaging portion 51 of the second embodiment can be formed into the shape of the engaging portion 351 of the third embodiment described above.

又，可相對於第二實施方式之軸體204而設置如上述第一實施方式之脆弱部46及台階部47。此時，如上述，軸體204係從軸座2的作用部24側***，且結合部42壓入於被壓入部31。In addition, the fragile portion 46 and the stepped portion 47 as in the first embodiment described above may be provided with respect to the shaft body 204 of the second embodiment. At this time, as described above, the shaft body 204 is inserted from the acting portion 24 side of the shaft seat 2, and the coupling portion 42 is pressed into the pressed portion 31.

上述實施方式僅為例示，本發明之範圍不限定於此。The above-mentioned embodiments are merely examples, and the scope of the present invention is not limited thereto.

本發明之範圍係根據申請專利範圍而定義，與申請專利範圍均等範圍之變形或變更皆包括於本發明之範圍內。The scope of the present invention is defined according to the scope of the patent application, and variations or changes equivalent to the scope of the patent application are included in the scope of the present invention.

－產業上的可利用性－－Industry availability－

本發明可利用於裝設於旋轉工具之前端工具。The invention can be used for tools installed at the front end of a rotary tool.

1 1:前端工具 2:軸座 4、204、304:軸體 50、250、350:***部 51、351:卡合部 52:前端側部 53、253:基端側部 100:旋轉工具 101:裝設孔 102:擋件1 1: front-end tools 2: Shaft seat 4, 204, 304: shaft body 50, 250, 350: insertion part 51,351: Engagement Department 52: front side 53, 253: base side 100: rotating tool 101: installation hole 102: stop

圖1係表示本發明之實施方式之前端工具之剖視圖，係表示裝設於旋轉工具之裝設部之狀態。 圖2係相當於圖1之II-II線之剖視圖。 圖3係相當於圖1之III-III線之剖視圖。 圖4係表示第一實施方式之變形例之前端工具之剖視圖。 圖5係表示第二實施方式之前端工具之剖視圖。 圖6係相當於圖5之VI-VI線之剖視圖。 圖7係表示第三實施方式之前端工具之剖視圖。FIG. 1 is a cross-sectional view showing a front-end tool according to an embodiment of the present invention, and shows a state of being mounted on a mounting portion of a rotary tool. FIG. 2 is a cross-sectional view corresponding to line II-II of FIG. 1. FIG. 3 is a cross-sectional view corresponding to line III-III of FIG. 1. 4 is a cross-sectional view showing a front end tool of a modification of the first embodiment. FIG. 5 is a cross-sectional view showing the front end tool of the second embodiment. FIG. 6 is a cross-sectional view corresponding to line VI-VI of FIG. 5. Fig. 7 is a cross-sectional view showing a front end tool of the third embodiment.

53:基端側部 53: base side

100:旋轉工具 100: rotating tool

101:裝設孔 101: installation hole

Claims (5)

一種前端工具，其係裝設於旋轉工具，並具備： 筒狀軸座，及 軸體，其結合於上述軸座，並具有***上述旋轉工具之裝設孔內之***部， 於上述旋轉工具之裝設孔設置有擋件，上述擋件係抑制上述***部從上述裝設孔脫落， 上述***部係具有與上述擋件卡合之卡合部， 上述***部中，以較上述卡合部靠上述軸座側之部分為前端側部，以較上述卡合部靠上述反軸座側之部分為基端側部， 上述前端側部之橫剖面形狀為與上述裝設孔之內周面相接之形狀， 上述基端側部之橫剖面積小於上述前端側部之橫剖面積。A front-end tool, which is installed on a rotating tool and has: Cylindrical shaft seat, and The shaft body is combined with the shaft seat and has an insertion portion inserted into the installation hole of the rotary tool, A stopper is provided in the installation hole of the rotary tool, the stopper prevents the insertion portion from falling out of the installation hole, The insertion portion has an engaging portion that engages with the stopper, In the insertion portion, a portion closer to the shaft seat side than the engaging portion is a front end side portion, and a portion closer to the counter shaft seat side than the engaging portion is a base end side portion, The cross-sectional shape of the front end side portion is a shape that is in contact with the inner peripheral surface of the installation hole, The cross-sectional area of the base end side portion is smaller than the cross-sectional area of the front end side portion. 如請求項1所記載之前端工具，其中， 上述基端側部之橫剖面形狀為圓形。Front-end tools as described in claim 1, where, The cross-sectional shape of the base end side portion is circular. 如請求項1所記載之前端工具，其中， 上述前端側部之橫剖面形狀為多邊形狀， 上述基端側部之橫剖面形狀為角數多於上述前端側部之多邊形狀。Front-end tools as described in claim 1, where, The cross-sectional shape of the front end side is polygonal, The cross-sectional shape of the base end side portion is a polygonal shape with a larger number of angles than the front end side portion. 如請求項1至3中任一項所記載之前端工具，其中， 上述軸體係具有與上述軸座重複之重複部， 上述重複部設置有脆弱部，上述脆弱部比上述***部之上述卡合部更細。The front-end tool as described in any one of claims 1 to 3, wherein, The above-mentioned shaft system has a repeating portion that repeats with the above-mentioned shaft seat, The repeating portion is provided with a weak portion, and the weak portion is thinner than the engaging portion of the insertion portion. 如請求項4所記載之前端工具，其中， 上述軸座係具有貫通孔，上述貫通孔係供上述軸體中較上述脆弱部靠上述***部側之部分穿過， 上述重複部係位於上述脆弱部與上述貫通孔之間，且具有直徑大於上述貫通孔之台階部。Front-end tools as described in claim 4, where, The shaft seat has a through-hole, and the through-hole is a portion of the shaft body closer to the insertion portion than the fragile portion, The repeating portion is located between the fragile portion and the through hole, and has a stepped portion having a diameter larger than the through hole.
TW108135337A 2018-10-17 2019-09-27 Tip tool TWI717852B (en)

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JP2757167B2 (en) * 1996-03-14 1998-05-25 北陽産業株式会社 Manufacturing method of socket with shaft
US6196332B1 (en) * 1998-12-03 2001-03-06 Ingersoll-Rand Company Rotational energy storage device and tools incorporating same
TW566281U (en) * 2001-03-16 2003-12-11 Shau-Shian Shiu Improved alignment structure for fast removal link rod
JP3992667B2 (en) * 2003-08-12 2007-10-17 日東工器株式会社 electric screwdriver
JP4667026B2 (en) * 2004-11-29 2011-04-06 株式会社ベッセル工業 Rotating tool socket
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JP6590704B2 (en) * 2016-01-12 2019-10-16 株式会社中電工 Tip tool connection structure
JP2017144506A (en) * 2016-02-16 2017-08-24 京都機械工具株式会社 Tip tool and rotary tool on which tip tool is mounted

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TWI717852B (en) 2021-02-01
CN111055231B (en) 2021-07-13

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