TWI783787B

TWI783787B - torque wrench

Info

Publication number: TWI783787B
Application number: TW110143173A
Authority: TW
Inventors: 陳瀅如
Original assignee: 元鑠工具有限公司
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-11-11
Also published as: TW202320994A

Abstract

一種扭力扳手包括一管體具有連通兩端的一管孔，管體兩端分別組設一驅動頭及一扭力調整組；驅動頭包含互相連接的頭部及接桿，且接桿伸入管孔內；一連動桿設於管孔內且兩端分別連接接桿、扭力調整組，連動桿具有凹設於外周面的徑向容槽，徑向容槽套組一滾動組；滾動組包含容置於徑向容槽內的一滾珠，滾珠部分凸出於徑向容槽之槽口並靠抵管孔的內孔壁；該扭力調整組的扭力調節操作帶動連動桿於管孔內位移，使徑向容槽內的滾珠相對管孔內壁滾動，有效避免扭力調節操作時因為滑動摩擦所造成的操作阻力與結構磨耗，提高使用的穩定性與順暢度。A torque wrench comprises a pipe body with a pipe hole connecting both ends, and a driving head and a torque adjustment group are respectively arranged at the two ends of the pipe body; the driving head includes a head and a post connected to each other, and the post extends into the pipe hole Inside; a linkage rod is set in the tube hole and its two ends are respectively connected to the connecting rod and the torque adjustment group. A ball placed in the radial groove, the ball part protrudes from the notch of the radial groove and leans against the inner hole wall of the pipe hole; the torque adjustment operation of the torque adjustment group drives the linkage rod to move in the pipe hole, The balls in the radial groove roll against the inner wall of the tube hole, effectively avoiding the operation resistance and structural wear caused by sliding friction during the torque adjustment operation, and improving the stability and smoothness of use.

Description

扭力扳手torque wrench

本發明涉及手工具設備的技術領域，尤其是指一種扭力扳手。The invention relates to the technical field of hand tools, in particular to a torque wrench.

一般工業上在進行鎖固作業時，由於每個人對力量大小的感覺不盡相同，且某些特殊的結合方式也並非越緊越好，因此會使用可設定扭力值的扭力扳手，以避免鎖固件鎖固過緊而導致被鎖固之物件破損或是鎖固件之螺牙損壞等問題發生。In general industry, when performing locking operations, since everyone feels differently about the magnitude of the force, and some special combinations are not as tight as possible, a torque wrench with a settable torque value is used to avoid locking. Problems such as damage to the locked object or damage to the screw teeth of the locking piece occur when the firmware is locked too tightly.

如公告第I647075號之「扭力扳手結構」發明專利，該習知專利主要的創作目的，如其說明書於第0006段所述，係藉由套件設置於外管與頂持件之間，減少頂持件與外管間之接觸面積，降低彼此間之摩擦，在扭力扳手操作時，令頂持件之滑動效果更加順暢，增加本發明扭力扳手結構之扭力傳遞表現。For example, the invention patent of "torque wrench structure" in the announcement No. I647075, the main creation purpose of this conventional patent, as stated in paragraph 0006 of its description, is to reduce the jacking by setting the kit between the outer tube and the jacking piece The contact area between the part and the outer tube reduces the friction between each other, and when the torque wrench is operated, the sliding effect of the top holding part is smoother, and the torque transmission performance of the torque wrench structure of the present invention is improved.

然而，上述習知專利該套件的接觸部係為以密集纏繞的螺旋狀徑向結構，因此，當套件於外管的容置空間內滑沿外管的軸向滑動時，該套件的複數接觸部還是會與外管的內壁形成密集纏繞的螺旋線條接觸摩擦，而降低扭力扳手結構的扭力傳遞表現。However, the contact portion of the sleeve in the above-mentioned known patent is a densely wound helical radial structure. Therefore, when the sleeve slides in the accommodating space of the outer tube and slides along the axial direction of the outer tube, the plural contacts of the sleeve The part will still form a densely wound helical line contact friction with the inner wall of the outer tube, which will reduce the torque transmission performance of the torque wrench structure.

尤其是，當添加於外管與套件之間的潤滑油隨著長久時間使用及頻繁的操作而逐漸流失減少，導致潤滑效果逐漸遞減，就會因為摩擦使得扭力傳遞效果明顯降低，且會進一步造成使用不順與結構磨耗。In particular, when the lubricating oil added between the outer tube and the sleeve gradually loses and decreases with long-term use and frequent operations, resulting in a gradual decrease in the lubricating effect, the torque transmission effect will be significantly reduced due to friction, and will further cause Irregular use and structural wear.

所以，如何改善習知扭力扳手因為滑動摩擦的缺點造成使用不順及結構磨耗的缺點，是為本創作所要解決問題所在。Therefore, how to improve the shortcomings of the conventional torque wrench due to the shortcomings of sliding friction and structural wear and tear is the problem to be solved for this creation.

本發明之主要目的，透過設於扳手內的滾動組，能有效避免扭力調節操作時因為滑動摩擦所造成的操作阻力與結構磨耗，進一步提高使用的穩定性與順暢度。The main purpose of the present invention is to effectively avoid the operation resistance and structural wear caused by sliding friction during the torque adjustment operation through the rolling group installed in the wrench, and further improve the stability and smoothness of use.

為了達成上述之目的與功效，本發明一種扭力扳手，包括：In order to achieve the above purpose and effect, a torque wrench of the present invention comprises:

一管體，其具有連通兩端的一管孔，該管體兩端分別組設一驅動頭及一扭力調整組。A pipe body has a pipe hole connecting two ends, and a driving head and a torque adjustment group are respectively arranged at the two ends of the pipe body.

該驅動頭包含互相連接的一頭部及一接桿，且該接桿伸入於該管孔內。The driving head includes a head and a connecting rod connected to each other, and the connecting rod extends into the tube hole.

一連動桿，其設於該管孔內且兩端分別連接該接桿、該扭力調整組，該連動桿具有凹設於外周面的至少一徑向容槽，且該至少一徑向容槽分別套組一滾動組。A linkage rod, which is arranged in the pipe hole and connected to the connecting rod and the torque adjustment group at both ends, the linkage rod has at least one radial slot recessed on the outer peripheral surface, and the at least one radial slot Set a rolling group separately.

該滾動組包含一滾珠，該滾珠容置於該徑向容槽內，使該滾珠部分凸出於該徑向容槽之槽口並靠抵該管孔的內孔壁。The rolling group includes a ball, which is accommodated in the radial groove, so that the ball protrudes from the notch of the radial groove and leans against the inner hole wall of the pipe hole.

該扭力調整組的扭力調節操作帶動該連動桿於該管孔內位移，使至少一徑向容槽內的該滾珠相對管孔內壁滾動。The torque adjustment operation of the torque adjustment group drives the linkage rod to displace in the tube hole, so that the ball in at least one radial groove rolls relative to the inner wall of the tube hole.

本發明一種扭力扳手之第二種實施例，包括：A second embodiment of a torque wrench of the present invention includes:

一管體，其具有連通兩端的一管孔，該管體兩端分別組設一驅動頭及一扭力調整組；A pipe body, which has a pipe hole connecting the two ends, and the two ends of the pipe body are respectively equipped with a driving head and a torque adjustment group;

該驅動頭包含互相連接的一頭部及一接桿，且該接桿伸入於該管孔內；The drive head includes a head and a connecting rod connected to each other, and the connecting rod extends into the tube hole;

一連動桿，其設於該管孔內且兩端分別連接該接桿、該扭力調整組，該連動桿具有間距設置的複數徑向孔，該複數徑向孔沿徑向貫穿該連動桿，且該複數徑向孔分別套組一滾動組；A linkage rod, which is arranged in the pipe hole and connected to the connecting rod and the torque adjustment group at both ends, the linkage rod has a plurality of radial holes arranged at intervals, and the plurality of radial holes penetrates the linkage rod in the radial direction, And the plurality of radial holes are respectively set into a rolling group;

該滾動組分別包含一螺旋彈簧及二滾珠，該二滾珠位於其中一徑向孔內的兩端開口位置，該螺旋彈簧位於該二滾珠之間並以兩端彈抵該二滾珠，使該二滾珠彈性靠抵該管孔的內孔壁；The rolling group includes a coil spring and two balls respectively, the two balls are located at the openings at both ends of one of the radial holes, the coil spring is located between the two balls and bounces against the two balls with both ends, so that the two The ball elastically leans against the inner hole wall of the pipe hole;

該扭力調整組的扭力調節操作帶動該連動桿於該管孔內位移，各徑向孔兩端的該二滾珠相對管孔內壁滾動。The torque adjustment operation of the torque adjustment group drives the linkage rod to displace in the tube hole, and the two balls at both ends of the radial holes roll relative to the inner wall of the tube hole.

請參閱第一～八圖所示，本發明一種扭力扳手包含兩種實施例，其第一種實施例如第一至三圖所示，該扭力扳手100包括：Please refer to Figures 1 to 8. A torque wrench of the present invention includes two embodiments. The first embodiment is shown in Figures 1 to 3. The torque wrench 100 includes:

一管體10，其具有連通兩端的一管孔11，該管體10兩端分別組設一驅動頭20及一扭力調整組50；A pipe body 10, which has a pipe hole 11 connected to both ends, and a driving head 20 and a torque adjustment group 50 are respectively arranged at both ends of the pipe body 10;

該驅動頭20包含互相連接的一頭部21及一接桿22，且該接桿22伸入於該管孔11內；The driving head 20 includes a head 21 and a connecting rod 22 connected to each other, and the connecting rod 22 extends into the pipe hole 11;

一連動桿30，其設於該管孔11內且兩端分別連接該接桿22、該扭力調整組50，該連動桿30具有凹設於外周面的至少一徑向容槽32，且該至少一徑向容槽32分別套組一滾動組40；A linkage rod 30, which is arranged in the pipe hole 11 and connected to the connecting rod 22 and the torque adjustment group 50 at both ends, the linkage rod 30 has at least one radial groove 32 recessed on the outer peripheral surface, and the At least one radial groove 32 is respectively set with a rolling group 40;

該滾動組40包含一滾珠42，該滾珠42容置於該徑向容槽32內，使該滾珠42部分凸出於該徑向容槽32之槽口並靠抵該管孔11的內孔壁；The rolling group 40 includes a ball 42, the ball 42 is accommodated in the radial groove 32, so that the ball 42 partially protrudes from the notch of the radial groove 32 and abuts against the inner hole of the pipe hole 11 wall;

該扭力調整組50的扭力調節操作帶動該連動桿30於該管孔11內位移，使至少一徑向容槽32內的該滾珠42相對管孔11內壁滾動。The torque adjusting operation of the torque adjusting group 50 drives the linkage rod 30 to displace in the tube hole 11 , so that the ball 42 in at least one radial groove 32 rolls relative to the inner wall of the tube hole 11 .

前述為本發明主實施例之主要技術特徵，其對應本案申請專利範圍第一項的內容，得以詳知本發明之目的與實施型態，而其餘附屬申請專利範圍所述的技術特徵是為對申請專利範圍第一項內容的詳述或附加技術特徵，而非用以限制申請專利範圍第一項的界定範圍，應知本案申請專利範圍第一項不必要一定包含其餘附屬申請專利範圍所述的技術特徵。The foregoing is the main technical feature of the main embodiment of the present invention, which corresponds to the content of the first item of the scope of the patent application of this case, so that the purpose and implementation type of the present invention can be known in detail, and the technical features described in the scope of the remaining subsidiary applications are for the purpose of The detailed description or additional technical features of the first item of the patent application scope are not used to limit the scope of the first item of the patent application scope. It should be known that the first item of the patent application scope in this case does not necessarily include the description of the other subsidiary application patent scopes technical characteristics.

接續上述內容進一步詳述本發明之實施方式、使用效果以及功效，由於本發明沿徑向貫穿該連動桿30的複數徑向容槽32內分別套組一滾珠42，且滾珠42部分凸出於徑向容槽32而靠抵該管孔11的內孔壁。Continuing the above content, the embodiment, use effect and function of the present invention are further described in detail. Since the present invention penetrates radially through the plurality of radial grooves 32 of the linkage rod 30, a ball 42 is set respectively, and the ball 42 partially protrudes from the The radial groove 32 abuts against the inner hole wall of the tube hole 11 .

所以，該扭力調整組50的扭力調節操作帶動該連動桿30於該管孔11內位移時，分別以各徑向容槽32內的滾珠42頂抵管孔11的內孔壁進行滾動。因此，能有效避免扭力調節操作時因為滑動摩擦所造成的操作阻力與結構磨耗，進一步提高使用的穩定性與順暢度。Therefore, when the torque adjustment operation of the torque adjustment group 50 drives the linkage rod 30 to move in the tube hole 11 , the balls 42 in the radial grooves 32 push against the inner wall of the tube hole 11 to roll. Therefore, the operation resistance and structural wear caused by sliding friction during the torque adjustment operation can be effectively avoided, and the stability and smoothness of use can be further improved.

而且，當以潤滑油添加於該管孔11內與該連動桿30之間時，又能以設於連動桿30的徑向容槽32含住潤滑油以提供滾珠42相對管孔11內壁滾動的持續性潤滑。Moreover, when lubricating oil is added between the pipe hole 11 and the connecting rod 30, the radial groove 32 provided on the connecting rod 30 can contain the lubricating oil to provide the ball 42 against the inner wall of the pipe hole 11. Rolling continuous lubrication.

於下進一步細述本發明的各元件之特徵，在上述第一至三圖中，該滾動組40進一步包含位於該徑向容槽32內的一螺旋彈簧41，該滾珠42受該螺旋彈簧41頂推而彈性頂抵該管孔11的內孔壁。而且，該至少一徑向容槽32分別具有呈外擴向外延伸的一錐狀口321；因此，藉該錐狀口321向外延伸的外擴結構，提供螺旋彈簧41、滾珠42的組裝導引；而且，當於管孔11內與連動桿30之間添加潤滑油時，錐狀口321與滾珠42之間的內部空可提供含住潤滑油，以維持滾珠42滾動的潤滑及提高扭力調節操作的順暢度。The characteristics of each element of the present invention are further described in detail below. In the above-mentioned first to third figures, the rolling group 40 further includes a coil spring 41 located in the radial groove 32, and the ball 42 is supported by the coil spring 41. Pushing and elastically resisting the inner hole wall of the pipe hole 11 . Moreover, the at least one radial groove 32 has a tapered mouth 321 extending outwards; therefore, the assembly of the coil spring 41 and the ball 42 is provided by the outwardly expanding structure of the tapered mouth 321. and, when lubricating oil is added between the pipe hole 11 and the connecting rod 30, the internal space between the tapered mouth 321 and the ball 42 can provide the lubricating oil to keep the rolling of the ball 42 and improve The smoothness of torque adjustment operation.

另外，本創作第二種實施例結構如第四至八圖所示，該扭力扳手100包含：In addition, the structure of the second embodiment of the present invention is shown in Figures 4 to 8, and the torque wrench 100 includes:

一管體10，其具有連通兩端的一管孔11，該管體10兩端分別組設一驅動頭20及一扭力調整組50。A pipe body 10 has a pipe hole 11 connecting two ends, and a driving head 20 and a torque adjustment group 50 are respectively assembled at both ends of the pipe body 10 .

一連動桿30，其設於該管孔11內且兩端分別連接該接桿22、該扭力調整組50，該連動桿30具有間距設置的複數徑向孔31，該複數徑向孔31沿徑向貫穿該連動桿30，且該複數徑向孔31分別套組一滾動組40；A linkage rod 30, which is arranged in the pipe hole 11 and its two ends are respectively connected to the connecting rod 22 and the torque adjustment group 50, the linkage rod 30 has a plurality of radial holes 31 arranged at intervals, and the plurality of radial holes 31 are arranged along the The linkage rod 30 runs through the linkage rod 30 radially, and the plurality of radial holes 31 are respectively set with a rolling group 40;

該滾動組40包含一螺旋彈簧41及二滾珠42，該二滾珠42位於其中一徑向孔31內的兩端開口位置，該螺旋彈簧41位於該二滾珠42之間並以兩端彈抵該二滾珠42，使該二滾珠42彈性靠抵該管孔11的內孔壁；The rolling group 40 includes a helical spring 41 and two balls 42. The two balls 42 are located at the open positions at both ends of one of the radial holes 31. The helical spring 41 is located between the two balls 42 and bounces against the two ends. Two balls 42, so that the two balls 42 elastically lean against the inner wall of the pipe hole 11;

該扭力調整組50的扭力調節操作帶動該連動桿30於該管孔11內位移，各徑向孔31兩端的該二滾珠42相對管孔11內壁滾動。The torque adjustment operation of the torque adjustment group 50 drives the linkage rod 30 to displace in the tube hole 11 , and the two balls 42 at two ends of each radial hole 31 roll relative to the inner wall of the tube hole 11 .

上述第二實施例透過徑向貫穿該連動桿30的複數徑向孔31內分別套組一螺旋彈簧41及二滾珠42，且螺旋彈簧41於該二滾珠42之間以兩端彈抵滾珠42，而使滾珠42彈性靠抵該管孔11的內孔壁。當扭力調整組50的扭力調節操作帶動該連動桿30於該管孔11內位移時，分別以各徑向孔31兩端的二滾珠42以具有彈性的頂抵管孔11的內孔壁進行滾動。因此，能有效避免扭力調節操作時因為滑動摩擦所造成的操作阻力與結構磨耗，進一步提高使用的穩定性與順暢度。In the above-mentioned second embodiment, a helical spring 41 and two balls 42 are respectively set in the plurality of radial holes 31 radially penetrating through the linkage rod 30 , and the helical spring 41 bounces against the balls 42 with both ends between the two balls 42 , so that the ball 42 elastically leans against the inner hole wall of the pipe hole 11 . When the torque adjustment operation of the torque adjustment group 50 drives the linkage rod 30 to move in the pipe hole 11, the two balls 42 at both ends of each radial hole 31 are elastically pressed against the inner hole wall of the pipe hole 11 for rolling. . Therefore, the operation resistance and structural wear caused by sliding friction during the torque adjustment operation can be effectively avoided, and the stability and smoothness of use can be further improved.

以下進一步描述第二實施例的各元件之特徵，其中，該複數徑向孔31分別具有位於兩端呈外擴向外延伸的一錐狀口311。而且，如第六、七圖所示，該複數徑向孔31以二徑向孔31為佳，且該二徑向孔31位於靠近該連動桿30兩端的位置，且該二徑向孔31至該連動桿30兩端的距離d不小於徑向孔31的直徑D；因此，藉由靠近該連動桿30兩端位置的徑向孔31，使孔內套組的滾動組40得以在該連動桿30的兩端形成滾動的穩定支撐，又藉徑向孔31至該連動桿30兩端的距離d不小於徑向孔31的直徑D，而使徑向孔31對連動桿30兩端結構強度的影響得以降到最低。The features of each component of the second embodiment will be further described below, wherein the plurality of radial holes 31 respectively have a tapered mouth 311 extending outwardly at both ends. Moreover, as shown in the sixth and seventh figures, the plurality of radial holes 31 are preferably two radial holes 31, and the two radial holes 31 are located near the two ends of the linkage rod 30, and the two radial holes 31 The distance d to the two ends of the linkage rod 30 is not less than the diameter D of the radial hole 31; therefore, by the radial hole 31 close to the two ends of the linkage rod 30, the rolling group 40 of the set in the hole can be moved in this linkage. The two ends of the rod 30 form a stable support for rolling, and the distance d from the radial hole 31 to the two ends of the linkage rod 30 is not less than the diameter D of the radial hole 31, so that the structural strength of the radial hole 31 to the two ends of the linkage rod 30 impact can be minimized.

其次，如第八圖所示，該二徑向孔31不同向，且該二徑向孔31之間的兩孔相差角度θ以90度為佳；所以，藉此徑向角度差距的排列，使連動桿30各徑向孔31兩端的該二滾珠42相對管孔11內壁的滾動得以形成較佳的操作平衡，以提高扭力調節操作的順暢度。Secondly, as shown in the eighth figure, the two radial holes 31 are not in the same direction, and the angle θ of the two holes between the two radial holes 31 is preferably 90 degrees; The rolling of the two balls 42 at the two ends of each radial hole 31 of the linkage rod 30 relative to the inner wall of the tube hole 11 can form a better operation balance, so as to improve the smoothness of the torque adjustment operation.

再者，該扭力調整組50包括一轉套51及滑組於該管孔11內的一彈性件52及一壓迫件53，且該彈性件52位於該連動桿30、該壓迫件53之間。Furthermore, the torque adjustment group 50 includes a rotating sleeve 51 and an elastic member 52 and a pressing member 53 slidingly assembled in the pipe hole 11, and the elastic member 52 is located between the linkage rod 30 and the pressing member 53 .

另外，該彈性件52為螺旋纏繞的壓縮彈簧，且該彈性件52兩端彈抵該連動桿30與該壓迫件53；因此，於扭力調節操作而旋動轉套51時，透過設於轉套51、壓迫件53之間的螺旋進退作動，使壓迫件53接受驅動而壓縮該彈性件52，藉由改變壓縮彈性件52的壓縮程度以便調整扭力值。In addition, the elastic member 52 is a helically wound compression spring, and the two ends of the elastic member 52 bounce against the linkage rod 30 and the pressing member 53; The screw between the sleeve 51 and the pressing member 53 moves forward and backward, so that the pressing member 53 is driven to compress the elastic member 52, and the torque value can be adjusted by changing the compression degree of the compressed elastic member 52.

如上所述本發明藉由設置於管體10內的滾動組，能確實避免目前習知扭力扳手因為操作上的摩擦以及衍生缺點，而達到以下優點：As mentioned above, the present invention can truly avoid the operational friction and derivative defects of the current conventional torque wrench by means of the rolling group arranged in the pipe body 10, and achieve the following advantages:

１、有效避免扭力調節操作時因為滑動摩擦所造成的操作阻力與結構磨耗。1. Effectively avoid operating resistance and structural wear caused by sliding friction during torque adjustment operation.

２、進一步提高扭力扳手在操作使用上的穩定性與順暢度。2. Further improve the stability and smoothness of the torque wrench in operation.

100:扭力扳手100: Torque wrench

10:管體10: tube body

11:管孔11: tube hole

20:驅動頭20: drive head

21:頭部21: head

22:接桿22: post

30:連動桿30: linkage rod

31:徑向孔31: radial hole

311、321:錐狀口311, 321: tapered mouth

32:徑向容槽32: radial volume

40:滾動組40:Rolling group

41:螺旋彈簧41: coil spring

42:滾珠42: Ball

50:扭力調整組50:Torque adjustment group

51:轉套51: turn sleeve

52:彈性件52: Elastic parts

53:壓迫件53: Compression piece

第一圖為本發明第一種實施例之立體組合示意圖。第二圖為本發明第一種實施例之立體分解示意圖。第三圖為第一圖Ⅲ-Ⅲ線段之剖面示意圖。第四圖為本發明第二種實施例之立體組合示意圖。第五圖為本發明第二種實施例之立體分解示意圖。第六圖為第四圖VI-VI線段之剖面示意圖。第七圖為第六圖之局部放大剖面示意圖。第八圖為第四圖ⅤIII-ⅤIII線段之剖面示意圖。 The first figure is a three-dimensional assembly diagram of the first embodiment of the present invention. The second figure is a three-dimensional exploded view of the first embodiment of the present invention. Figure 3 is a schematic cross-sectional view of line III-III in Figure 1. Figure 4 is a three-dimensional assembly diagram of the second embodiment of the present invention. The fifth figure is a three-dimensional exploded view of the second embodiment of the present invention. Figure 6 is a schematic cross-sectional view of line VI-VI in Figure 4 . The seventh figure is a partially enlarged cross-sectional schematic diagram of the sixth figure. Figure 8 is a schematic cross-sectional view of line VIII-VIII in Figure 4.

100:扭力扳手 100: Torque wrench

10:管體 10: tube body

20:驅動頭 20: drive head

50:扭力調整組 50:Torque adjustment group

51:轉套 51: turn sleeve

Claims

一種扭力扳手，包括：一管體，其具有連通兩端的一管孔，該管體兩端分別組設一驅動頭及一扭力調整組；該驅動頭包含互相連接的一頭部及一接桿，且該接桿伸入於該管孔內；一連動桿，其設於該管孔內且兩端分別連接該接桿、該扭力調整組，該連動桿具有凹設於外周面的至少一徑向容槽，且該至少一徑向容槽分別套組一滾動組；該滾動組包含一滾珠，該滾珠容置於該徑向容槽內，使該滾珠部分凸出於該徑向容槽之槽口並靠抵該管孔的內孔壁；該扭力調整組的扭力調節操作帶動該連動桿於該管孔內位移，使至少一徑向容槽內的該滾珠相對管孔內壁滾動；該至少一徑向容槽分別具有呈外擴向外延伸的一錐狀口。 A torque wrench, comprising: a pipe body, which has a pipe hole connecting two ends, and a driving head and a torque adjustment group are respectively arranged at both ends of the pipe body; the driving head includes a head and a connecting rod connected to each other , and the connecting rod extends into the pipe hole; a linkage rod, which is arranged in the pipe hole and connected to the connecting rod and the torque adjustment group at both ends, the linkage rod has at least one recessed on the outer peripheral surface radial grooves, and the at least one radial groove is respectively set with a rolling group; the rolling group includes a ball, and the ball is accommodated in the radial groove so that the ball protrudes from the radial groove The notch of the groove is against the inner hole wall of the tube hole; the torque adjustment operation of the torque adjustment group drives the linkage rod to displace in the tube hole, so that the ball in at least one radial groove is opposite to the inner wall of the tube hole Rolling; the at least one radial groove respectively has a tapered mouth extending outward.

如請求項1所述之扭力扳手，其中該滾動組進一步包含位於該徑向容槽內的一螺旋彈簧，該滾珠受該螺旋彈簧頂推而彈性頂抵該管孔的內孔壁。 The torque wrench according to claim 1, wherein the rolling group further includes a helical spring located in the radial groove, and the ball is pushed by the helical spring to elastically resist the inner hole wall of the tube hole.

一種扭力扳手，包括：一管體，其具有連通兩端的一管孔，該管體兩端分別組設一驅動頭及一扭力調整組；該驅動頭包含互相連接的一頭部及一接桿，且該接桿伸入於該管孔內；一連動桿，其設於該管孔內且兩端分別連接該接桿、該扭力調整組，該連動桿具有間距設置的複數徑向孔，該複數徑向孔沿徑向貫穿該連動桿，且該複數徑向孔分別套組一滾動組；該滾動組分別包含一螺旋彈簧及二滾珠，該二滾珠位於其中一徑向孔內的兩端開口位置，該螺旋彈簧位於該二滾珠之間並以兩端彈抵該二滾珠，使該二滾珠彈性靠抵該管孔的內孔壁；該扭力調整組的扭力調節操作帶動該連動桿於該管孔內位移，各徑向孔兩端的該二滾珠相對管孔內壁滾動。 A torque wrench, comprising: a pipe body, which has a pipe hole connecting two ends, and a driving head and a torque adjustment group are respectively arranged at both ends of the pipe body; the driving head includes a head and a connecting rod connected to each other , and the connecting rod extends into the pipe hole; A linkage rod, which is arranged in the pipe hole and connected to the connecting rod and the torque adjustment group at both ends, the linkage rod has a plurality of radial holes arranged at intervals, and the plurality of radial holes penetrates the linkage rod in the radial direction, And the plurality of radial holes are respectively set with a rolling group; the rolling group respectively includes a coil spring and two balls, the two balls are located at the openings at both ends of one of the radial holes, and the coil spring is located between the two balls And the two ends bounce against the two balls, so that the two balls elastically lean against the inner hole wall of the tube hole; the torque adjustment operation of the torque adjustment group drives the linkage rod to displace in the tube hole, and the two ends of each radial hole The two balls roll relative to the inner wall of the pipe hole.

如請求項3所述之扭力扳手，其中該複數徑向孔分別具有位於兩端呈外擴向外延伸的一錐狀口。 The torque wrench as described in Claim 3, wherein the plurality of radial holes each have a tapered opening at both ends extending outward.

如請求項3所述之扭力扳手，其中該複數徑向孔以二徑向孔為佳，且該二徑向孔位於靠近該連動桿兩端的位置，且該二徑向孔至該連動桿兩端的距離不小於徑向孔的直徑。 The torque wrench as described in claim 3, wherein the plurality of radial holes are preferably two radial holes, and the two radial holes are located near the two ends of the linkage rod, and the two radial holes reach the two ends of the linkage rod The distance between the ends is not less than the diameter of the radial hole.

如請求項5所述之扭力扳手，其中該二徑向孔不同向，且該二徑向孔之間的兩孔相差角度θ以90度為佳。 The torque wrench as described in Claim 5, wherein the two radial holes are not in the same direction, and the angle θ between the two radial holes is preferably 90 degrees.

如請求項3所述之扭力扳手，其中該扭力調整組包括一轉套及滑組於該管孔內的一彈性件及一壓迫件，且該彈性件位於該連動桿、該壓迫件之間。 The torque wrench as described in claim 3, wherein the torque adjustment group includes a rotating sleeve and a sliding assembly, an elastic member and a pressing member in the pipe hole, and the elastic member is located between the linkage rod and the pressing member .

如請求項7所述之扭力扳手，其中該彈性件為螺旋纏繞的壓縮彈簧，且該彈性件兩端彈抵該連動桿與該壓迫件。The torque wrench according to claim 7, wherein the elastic member is a helically wound compression spring, and both ends of the elastic member bounce against the linkage rod and the pressing member.