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TW201100208A - Lockable torque-limiting driver - Google Patents

Lockable torque-limiting driver Download PDF

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Publication number
TW201100208A
TW201100208A TW98120923A TW98120923A TW201100208A TW 201100208 A TW201100208 A TW 201100208A TW 98120923 A TW98120923 A TW 98120923A TW 98120923 A TW98120923 A TW 98120923A TW 201100208 A TW201100208 A TW 201100208A
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TW
Taiwan
Prior art keywords
torque
sleeve
cam
locking
positioning
Prior art date
Application number
TW98120923A
Other languages
Chinese (zh)
Other versions
TWI346602B (en
Inventor
Ching-Shu Huang
Original Assignee
Hern Juei Co Ltd
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Publication date
Application filed by Hern Juei Co Ltd filed Critical Hern Juei Co Ltd
Priority to TW098120923A priority Critical patent/TWI346602B/en
Publication of TW201100208A publication Critical patent/TW201100208A/en
Application granted granted Critical
Publication of TWI346602B publication Critical patent/TWI346602B/en

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Abstract

A lockable torque-limiting driver includes a body and a sleeve received in a sleeve chamber of the body and secured therein by recesses inside the body. The sleeve is provided with projecting edges on the outer wall to be respectively fitted in the recesses of the body, plural recessed grooves at the inner wall for fixing an upper cam, and female threads at the inner wall to be screwed with the male threads of a torque-limiting member, further disposed with plural positioning serrations at topside and a center chamber inside. The upper cam and a lower cam respectively have one-way serrations to be mutually engaged. The torque-limiting member is fixed with positioning projections to be actuated to move on the positioning serrations of the sleeve and give out sounds by which a user can know a torque limiting extent desired.

Description

201100208 六、發明說明: 【發明所屬之技術領域】 確度 Ο ο 【先前技術】 按目如之扭力限制工具,如耶patent N〇. 7, 487, 7〇〇β2 LOCKABLE TORQUE-LIMITING DRIVER M) METHOD」,第-種習知 ,主要係藉由分離狀之第一種實施例「adjustment _ 6〇」與 lacking plate 75」;或第二種實施例「adj_ustment plug 67」 n lockmg plate 80」;或第三種實施例「adj.ustment plug 67」 與locking plate 1〇〇」間之結合,並藉由調整者以手指轉動 「locking plate」即可同時轉動「以細蚀抓piUg」並改變 「adjustment plug」與「sieeve 29」間之結合程度,作為調整 扭力方法,而於調整完成後,並再利用「l〇cking piate」之 body-engaging portion 77」所設之「serrations 79」得以與 「sleeve 29」之「a pair of prongs 29A」喫合而讓調整後之扭 力被完全固定。201100208 VI. Description of the invention: [Technical field to which the invention pertains] Ο Ο ο [Prior Art] Limiting tools according to the purpose, such as yypatent N〇. 7, 487, 7〇〇β2 LOCKABLE TORQUE-LIMITING DRIVER M) METHOD The first conventional method is mainly by the first embodiment of the separation form "adjustment _ 6 〇" and the "lacking plate 75"; or the second embodiment "adj_ustment plug 67" n lockmg plate 80"; or The third embodiment is a combination of "adj.ustment plug 67" and locking plate 1", and by the adjuster turning the "locking plate" with a finger, it is possible to simultaneously rotate "scratch piUg with fine etch" and change "adjustment" The degree of integration between the plug and the "sieeve 29" is used as a method of adjusting the torque. After the adjustment is completed, the "serrations 79" set by the "body-engaging portion 77" of "l〇cking piate" is used together with "sleeve" The "a pair of prongs 29A" of 29" is combined and the adjusted torque is completely fixed.

如 US patent No. 5, 397, 269「TORQUE LIMITING CLUTH AND ITS USES」,第二種習知者則是利用「ci〇sure block 76」鎖合於 「housing 40」之末端内側,並藉由調整「cl〇sure block 76」 鎖合入「housing 40」之程度,決定「driven member 50」之鎖 合扭力。 如 US patent No. 4, 238, 978「TORQUE WENCH」,第三種習知者, 則是利用「adjusting screw 36」設置於「main body of the housing 12」下方,得藉由調整「adjusting screw 36」以改變「socket tool 201100208 18」之鎖合扭力。 者若中第-種係設置於本體内側,使用 鎖合扭力’達到鎖合扭力一致性之效果。 自由調整ϊίί:整:U常見於目前市售產品’可由使用者 必須將「aH· + 斥卸工具結構即可達成。惟第一種習知 增加組裂之= 呈耐13呢」與「1〇Ckingplate」製成分離狀態, 【發明内容】 Ο ο 力之限制x鎖合扭目力2在,υ,、需:】用工具即可快速調整扭 知淨調敕藉# 於調整時传以發出聲響,讓使用者得以 明:限工不具需 為上^設置,讓上凸輪得以配合^__凹槽’以 本發明之限侧合扭力I具,主’要二m果。 棘齒’讓雜_触力_元狀=辭:fUf,定位 元件得以利用手指即可★周单鐘為疋1銷、',〇口,並讓扭力限制 本發明之限制鎖合扭力:且轉,亚,限制於不得反向轉動。 度快又準確。疋私度〜全不需利用外來工具,且調整逮 【實施方式】 下如此’為使責審查員可充份了解本發明,兹依附圖式解說如 示,本發明之鎖合扭力工具,至少句人. 本體卜於本體設置有套筒室10套 大開口 ,而下方設較小開孔 之上方設較 之形狀與設置,·於套筒室1G之 所::)’以配合套筒 ㈣11叹複數凹槽12,利用該些 201100208 m為套筒2之凸緣20設置後,得將本體1與套筒2結合 i ι/! *-體_設延伸部13,於延伸部13設結合孔130;設上 f μ4 ’,述延伸部13為對稱形狀,上蓋14内側設結合柱14〇, 义、修又=上蓋14蓋合於本體1上方後,得以前述結合柱140與 月,』13〇結合,即可將上蓋14與本體1結合為一體。 兮Λ4 圖5〜9所示,係於外壁設複數凸緣2〇,得利用 前述本體1之複數凹槽12中,讓套筒2與本體1 "! " ,°又較大之上開口 21與較小之下開孔22 (如圖8及9 Ο ❹ 鎖合桿3穿設並設置;於内麵複數凹槽23,以為上 蚊24 限制上凸輪4須與套筒共同運作;於内壁設内螺 ίΓ.Ζϋ 元件7鎖合,並產生關本王具鎖合扭力之 方設複數定位棘齒25,各定位棘齒25均設直立面 251 ·’奏心立25G最上端向後延伸形成斜向設置之孤形面 ’ f Μ件室26 (如圖4及5所示),以為上凸輪4、下凸 輪5、、壓縮彈簧6與扭力限制元件7設置。 〜如Λ5〜7所示’於桿部30為六邊型’且於桿部 :又1扣槽31,以為c型扣32扣設,得以限制上凸輪4、下凸 端=彈2 H置位置;於鎖合桿3之末端· 知可為-字型;或十字型;或六㈣;或星鮮各式形狀均 上凸輪4,⑤貫穿孔4G以為前述鎖合桿3穿過; ^數凸緣4卜利用該些凸緣41以設置於前述套筒2之凹^3面, 讓上凸輪4為前述套筒2限制呈現不轉動狀態 1 齒42,以配合下凸輪5之運作。 卜磲叹早向棘 下凸輪5,設貫穿孔50 ’為六邊型,以為前述鎖 > 邊型桿部3G穿過’麟下凸輪5與前述鎖合桿3 ^ 固設,以配合前述鎖合桿3之動作而運作;於下凸輪 = 5卜於大環SI 51之上表面設單向棘齒52,利用該 與前述上凸輪4之單向棘齒42紗,於讀鎖合 下’下凸輪5之單向棘齒52得與前述上凸輪4之單㈣^ 全喫合’献額者於設定扭力值之下操作本卫糾,前述本^ 6 201100208 1 m各元件均可啊被躺,㈣行鎖合工作。 壓縮彈簧6,設於前述上凸輪4之上方盥 間’且並為前補合桿3穿過。 ’、《制兀件7之 ιΪί限制元件7,如圖7、1 0及1 1所示,設外螺纹70 3„紋70與前述套筒2之内螺紋24互相螺合卜^二 71把件為前述鎖合桿3穿設;設延伸部72,於延伸i I各定位鎖73均設有弧形末端现:於延ΤΓί =74,利用該撥動部74可為調整者以手指轉動二: ο 疋以,當要將前述元件組合時,如 前述鎖合桿3之C型扣32與鎖合桿3結合5成;二自; ;設下凸輪5、上凸輪4與壓縮彈簧6: 件5又置於前述套筒2之元件室26中,㈣十+. = ±人冉將上述70 與前述套筒2之凹槽23結合,讓上凸 凸=之凸緣41 =著套筒之動作而運動;再將扭力限制元又件22=制 此時,調整者得以轉動扭力限制 二;、套^ 2鎖合’ 力限制元件7,而此同時,扭切如。ff動部74 ’進而轉動扭 ο 套筒之定位棘齒25上移動並發出H立f 73 $於前述 制之設定程度,完全不需利用外來工響且讓限 最後再將前述元件與本體結合 ^ 快又準媒。 2^〇 程度。 / i ^聊?丑刀兩緊主週當 於扭力設定範圍内:用:5所示, 前述高爾夫球頭之螺絲。但當使3二5二並_鎖合桿鎖合 時,如圖6所示,此時,該====之^值 壓前述壓縮彈簧6,讓上凸輪4與 生向上移動之力置而擠 該工具使得該本體與套筒繼續轉動脫離,即使使用者轉動 凸輪5互相脫離喫合狀態,而謓 ^則述因為上凸輪4與下 凸輪之驅動動力源,得以伴捭輪5與鎖合桿3脫離前述上 保持鎖合桿於不轉動狀態,藉以保護被 7 201100208 鎖合之高爾夫球頭之螺絲 案之組成。 避免影響球頭之擊球平衡性者 為本 【圖式簡單說明】 圖1是本發明之部分分解視圖。 圖2是本發明部分組合視圖。 圖3是圖2之A部分放大視圖。 圖4是本發明之剖視圖。 圖5疋本發明另一方向之剖視圖。 圖6疋本發明另一方向之剖視動作圖。For example, US Patent No. 5, 397, 269 "TORQUE LIMITING CLUTH AND ITS USES", the second one is to use the "ci〇sure block 76" to lock the inside of the end of "housing 40" and adjust it by "cl〇sure block 76" locks into the "housing 40" level and determines the locking torque of "driven member 50". For example, US Patent No. 4, 238, 978 "TORQUE WENCH", the third conventional one, uses "adjusting screw 36" under "main body of the housing 12", by adjusting "adjusting screw 36" To change the locking torque of "socket tool 201100208 18". If the first type is placed inside the body, the locking torque is used to achieve the consistency of the locking torque. Free adjustment ϊίί: Whole: U is common in current commercial products' can be achieved by the user "aH + + detachable tool structure can be achieved. But the first one increases the number of cracks = is resistant to 13" and "1 〇Ckingplate" is made into a separate state, [Summary of the Invention] Ο ο Limit of force x lock and twisting force 2, υ,, need:] Use tools to quickly adjust the twist to the net 敕 敕The sound makes the user understand that the restriction is not necessary for the upper setting, so that the upper cam can be matched with the ^__groove' with the limited side torque of the present invention, and the main 'make two. Ratchet 'to make miscellaneous _ touch force _ metamorphosis = word: fUf, the positioning element can be used with the finger ★ Zhou single clock for 疋 1 pin, ', 〇 mouth, and let the torque limit the limit lock torque of the invention: and turn, Ya, limited to not rotating in the opposite direction. Fast and accurate.疋 度 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Sentence. The body is provided with 10 sets of large openings in the sleeve chamber, and the shape and arrangement above the smaller openings are provided. · In the sleeve chamber 1G::)' to fit the sleeve (4) 11 Singing the plurality of grooves 12, after the 201100208 m is used as the flange 20 of the sleeve 2, the body 1 and the sleeve 2 are combined with the i ι /! *- body _ the extension portion 13 is provided, and the extension portion 13 is combined. The hole 130; is provided with f μ4 ', the extension portion 13 has a symmetrical shape, and the inner cover 14 is provided with a coupling post 14 〇, and the upper cover 14 is covered on the upper side of the body 1 to be coupled with the column 140 and the moon. The upper cover 14 and the body 1 can be integrated into one body by combining 13 turns.兮Λ4 As shown in Figures 5 to 9, a plurality of flanges 2 are provided on the outer wall, and the plurality of grooves 12 of the body 1 are used to make the sleeve 2 and the body 1 "! " The opening 21 and the lower lower opening 22 (as shown in Figs. 8 and 9), the locking rod 3 is pierced and disposed; the inner surface has a plurality of grooves 23, so that the upper mosquito 24 limits the upper cam 4 to work together with the sleeve; The inner wall is provided with a screw Γ Γ Ζϋ 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件 元件Extending to form an obliquely disposed solitary surface 'f Μ chamber 26 (shown in Figures 4 and 5), such that the upper cam 4, the lower cam 5, the compression spring 6 and the torsion limiting element 7 are disposed. ~ 如Λ5~7 Illustrated 'the shank portion 30 is hexagonal type' and the shank portion: 1 buckle groove 31, so that the c-shaped buckle 32 is buckled to limit the upper cam 4, the lower convex end = the elastic 2 H position; The end of the rod 3 is known as a - type; or a cross type; or a six (four); or a variety of shapes of the star-shaped upper upper cam 4, 5 through the hole 4G to pass the aforementioned locking rod 3; ^ number of flanges 4 Use this The flange 41 is disposed on the concave surface of the sleeve 2, so that the upper cam 4 defines the non-rotating state 1 tooth 42 for the sleeve 2 to cooperate with the operation of the lower cam 5. 5, the through hole 50' is hexagonal, so that the lock> the side rod 3G is fixed through the 'subliminal cam 5 and the lock lever 3^ to cooperate with the action of the lock lever 3 The lower cam = 5 is provided with a one-way ratchet 52 on the upper surface of the large ring SI 51, and the one-way ratchet 52 of the upper cam 4 is used to read and lock the one-way spine of the lower cam 5 The tooth 52 has to be operated with the single (four) ^ all-in-one of the aforementioned upper cam 4, and the operator is operated under the set torque value. The above components can be lying, and (4) the row locking work The compression spring 6 is disposed between the upper portion of the upper cam 4 and is inserted by the front complementing rod 3. ', the ιΪί limiting element 7 of the manufacturing device 7 is as shown in Figs. 7, 10 and 11. The external thread 70 3 gusset 70 and the internal thread 24 of the sleeve 2 are screwed together. The second 71 piece is inserted into the lock lever 3; the extension portion 72 is provided to extend the position lock 73. All set The curved end is now: in the delay ί = 74, the toggle portion 74 can be used to rotate the finger by the adjuster: ο 疋, when the aforementioned components are to be combined, such as the C-shaped buckle 32 of the aforementioned lock lever 3 Combined with the lock lever 3; 5;; set the lower cam 5, the upper cam 4 and the compression spring 6: the piece 5 is placed in the component chamber 26 of the sleeve 2, (4) ten +. = ± The above 70 is combined with the groove 23 of the sleeve 2 to allow the upper flange = the flange 41 to move under the action of the sleeve; and then the torque limiting element is again 22 = at this time, the adjuster can rotate the torque limit Second; the sleeve ^ 2 locks the force limiting element 7, while at the same time, the twisting is as. The ff moving portion 74' is further rotated and twisted. The positioning ratchet 25 of the sleeve moves and emits a H-f 73. The degree of the above-mentioned system is set, and the external components are not required to be used at all, and the components are finally combined with the body. ^ Quick and accurate media. 2^〇 Degree. / i ^ Talk? Ugly knife two tight main week when the torque is within the range: with: 5, the aforementioned golf head screw. However, when the 3 2 5 _ lock lever is locked, as shown in FIG. 6 , at this time, the value of the ==== presses the compression spring 6 to force the upper cam 4 and the upward movement. Extrusion of the tool causes the body and the sleeve to continue to rotate away from each other, even if the user rotates the cams 5 out of the mating state, and the brakes are driven by the driving power source of the upper cam 4 and the lower cam, thereby being able to accompany the wheel 5 and the lock The splicing rod 3 is disengaged from the above-mentioned upper holding lock lever in a non-rotating state, thereby protecting the composition of the screw of the golf head that is locked by the 201100208. Avoiding the balance of the ball striking the ball is based on a simple illustration of the drawing. Fig. 1 is a partially exploded view of the present invention. Figure 2 is a partial assembled view of the present invention. Figure 3 is an enlarged view of a portion A of Figure 2. Figure 4 is a cross-sectional view of the present invention. Figure 5 is a cross-sectional view of another aspect of the present invention. Figure 6 is a cross-sectional view showing the other direction of the present invention.

圖7是本發明部分分解視圖。 圖8是本發明套筒之視圖。 圖9是本發明套筒之底部視圖。 圖10是本發明扭力限制元件之視圖。 圖11是本發明扭力限制元件之剖視圖。 圖12是本發明之組合視圖。 【主要元件符號說明】 本體1、套筒室10、開口 1〇〇、 延伸部尸、結合孔、上蓋Μ、結合柱刚 1、凹槽12、 套筒2、凸緣2〇、上開口 21、弓 24、定位棘齒25、直立面25〇、弧形丄、元、内螺紋 鎖合桿3、桿部3〇、C型扣槽31、C型扣^ 上凸輪4、貫穿孔40、凸緣4卜 鎖口端33 杻力限制元件7、外螺紋7〇 弧形末端730、撥動部74 貫穿孔71、延伸部72 定位銷73、 $Figure 7 is a partially exploded view of the present invention. Figure 8 is a view of the sleeve of the present invention. Figure 9 is a bottom plan view of the sleeve of the present invention. Figure 10 is a view of the torque limiting member of the present invention. Figure 11 is a cross-sectional view of the torque limiting member of the present invention. Figure 12 is a combined view of the present invention. [Description of main component symbols] The main body 1, the sleeve chamber 10, the opening 1〇〇, the extension body, the coupling hole, the upper cover 结合, the binding column just 1, the groove 12, the sleeve 2, the flange 2〇, the upper opening 21 , bow 24, positioning ratchet 25, erect surface 25 〇, curved 丄, element, internal thread lock lever 3, rod 3 〇, C-shaped buckle groove 31, C-type buckle ^ upper cam 4, through hole 40, Flange 4 lock port end 33 force limiting member 7, external thread 7 〇 curved end 730, dial portion 74 through hole 71, extension portion 72 locating pin 73, $

Claims (1)

201100208 七、申請專利範圍: 1 ·一種限制鎖合扭力工具,至少包含: L : 5又套筒室,以為套筒設置;於内壁設複數凹槽5得與 -i- 、、、口 口, 从ϋ!·於外壁設複數凸緣’以設置前述本體之複數凹槽中; ㈣’以為上凸輪設置;於内壁設闕紋,以為扭 力限,讀鎖合;於套紅方設複數定位棘齒;設元件室,以為 下凸輪、亡凸輪、壓、缩彈簧與扭力限制元件設置 Ο ❹ 鎖合桿,桿部為六邊型,於桿部設C型扣槽,以為c型扣扣 設;於鎖合桿末端設鎖合端; 上凸,’設貫穿孔以為前述鎖合桿穿設;於外表面設複數凸 緣’利用⑦些凸緣以設置於前述套筒之内壁凹槽;下端設單 齒,配合下凸輪; I凸輪,設貫穿孔,以為前述鎖合桿之桿部穿設;於下凸輪 設大環圍,大環圍設單向棘齒,利用該單向棘齒得與前述上凸 之單向棘齒喫合; 壓縮彈簧,設於前述上凸輪之上方與扭力限制元件間, 前述鎖合桿穿設; 馬 扭力限制元件,設外螺紋,得利用外螺紋與前述套筒内螺紋 互相螺合;設貫穿孔,得為前述鎖合桿穿設;設延伸部,於延伸 部外側設複數定位銷,於延伸部設撥動部,利用該撥動部可為 整者以手指轉動扭力限制元件轉動。 ' 2.依申请專利範圍第1項所述之限制鎖合扭力工具,其中 本體兩侧設延伸部,延伸部設結合孔;設上蓋,上蓋内侧設結人 柱’得以前述結合柱與前述結合孔結合,以將上蓋與本體結 一體。 3 ·依申請專利範圍第1項所述之限制鎖合扭力工具,其中 套筒之定位棘齒設直立面’及自直立面最上端向後延伸形成斜 設置之弧形面。 @ 4 ·依申請專利範圍第1項所述之限制鎖合扭力工具,其 9 201100208 扭力限制元件之定位銷設弧形末端。 5。依申請專利範圍第1項所述之限制鎖合扭力工具,其中 扭力限制元件之定位銷於套筒之定位棘齒上移動時得發出聲響, 讓調整者得以知悉扭力調整之設定值。201100208 VII, the scope of application for patents: 1 · A limited lock torque tool, at least: L: 5 and sleeve chamber, set up for the sleeve; set a plurality of grooves 5 on the inner wall with -i-,,, mouth, From the ϋ!· Set a plurality of flanges on the outer wall to set the plurality of grooves of the body; (4) 'Think the upper cam; set the lining on the inner wall to determine the torque limit, read and lock; set the complex positioning spine on the red side Tooth; set the component chamber, so that the lower cam, the dead cam, the pressing and contracting springs and the torsion limiting element are provided with a 锁 锁 locking lever, the rod portion is a hexagonal type, and a C-shaped buckle groove is provided at the rod portion, so that the c-shaped buckle is provided a locking end is provided at the end of the locking rod; an upper convex portion is provided with a through hole for the aforementioned locking rod; a plurality of flanges are provided on the outer surface to provide a groove for the inner wall of the sleeve; The lower end is provided with a single tooth and the lower cam; the I cam is provided with a through hole for the rod portion of the lock lever; the lower cam is provided with a large ring circumference, and the large ring is provided with a one-way ratchet, and the one-way ratchet is used. It has to be combined with the aforementioned convex one-way ratchet; the compression spring is set in front Between the upper cam and the torsion limiting element, the locking rod is pierced; the horse torque limiting element is provided with an external thread, and the external thread is screwed to the internal thread of the sleeve; and the through hole is provided as the aforementioned locking rod The insertion portion is provided with a plurality of positioning pins on the outer side of the extension portion, and a dial portion is provided on the extension portion, and the toggle portion can be used to rotate the torque with the finger to restrict the rotation of the component. 2. The restrictive locking torque tool according to claim 1, wherein an extension portion is arranged on both sides of the body, and the extension portion is provided with a coupling hole; an upper cover is provided, and the inner side of the upper cover is provided with the binding column and the aforementioned coupling hole Combined to integrate the upper cover with the body. 3. The restrictive locking torque tool according to the first aspect of the patent application, wherein the positioning ratchet of the sleeve is provided with an upright surface ′ and extends from the uppermost end of the erect surface to form an oblique curved surface. @ 4 · According to the restricted lock torque tool described in item 1 of the patent application, 9 201100208 The positioning pin of the torque limiting element is provided with a curved end. 5. According to the limit lock torque tool described in claim 1, wherein the positioning pin of the torque limiting member sounds when moving on the positioning ratchet of the sleeve, so that the adjuster can know the set value of the torque adjustment.
TW098120923A 2009-06-23 2009-06-23 Lockable torque-limiting driver TWI346602B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2521205A (en) * 2013-12-13 2015-06-17 Ching-Shu Huang Tool driver
TWI715360B (en) * 2019-12-19 2021-01-01 陸同五金機械有限公司 Torque wrench structure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI823600B (en) * 2022-10-06 2023-11-21 海瑞特股份有限公司 Torque limiting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2521205A (en) * 2013-12-13 2015-06-17 Ching-Shu Huang Tool driver
TWI715360B (en) * 2019-12-19 2021-01-01 陸同五金機械有限公司 Torque wrench structure

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