WO2016165490A1 - 一种活动扳手 - Google Patents
一种活动扳手 Download PDFInfo
- Publication number
- WO2016165490A1 WO2016165490A1 PCT/CN2016/074448 CN2016074448W WO2016165490A1 WO 2016165490 A1 WO2016165490 A1 WO 2016165490A1 CN 2016074448 W CN2016074448 W CN 2016074448W WO 2016165490 A1 WO2016165490 A1 WO 2016165490A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- worm wheel
- hole
- adjustable wrench
- elastic member
- wrench
- Prior art date
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Classifications
-
- 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
- B25B13/00—Spanners; Wrenches
- B25B13/10—Spanners; Wrenches with adjustable jaws
- B25B13/12—Spanners; Wrenches with adjustable jaws the jaws being slidable
- B25B13/14—Spanners; Wrenches with adjustable jaws the jaws being slidable by rack and pinion, worm or gear
-
- 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
Definitions
- the invention relates to a wrench, in particular to an adjustable wrench.
- the adjustable wrench is generally composed of a wrench body, a worm wheel, a pin shaft, a spring, etc., and is a tool for tightening or loosening a corner screw or a nut.
- the wrench body includes a handle and a working portion.
- the working part includes a fixing portion, a movable portion and a sliding slot.
- the lower end of the movable portion is disposed in the chute to move toward or away from the fixed portion.
- the bottom edge of the lower end of the movable portion is provided with a tooth portion.
- the teeth mesh with the threads on the worm gear. Since the thread on the worm wheel meshes with the tooth portion of the bottom edge of the lower end of the movable portion, the worm wheel is rotated to move the movable portion along the chute to move toward or away from the fixed portion.
- the number of spirals of the thread on the worm wheel is one, which is a single thread
- the speed of moving the movable part is slower when the worm wheel is rotated
- the torque of the single threaded worm wheel can be less.
- the handle is hit, resulting in the clamping port between the fixed portion and the movable portion becoming larger, causing the clamping to become loose, and the angular deformation of the screw or the nut is damaged.
- the technical problem to be solved by the present invention is to provide an adjustable wrench that can be quickly Adjust the distance between the movable part and the fixed part, increase the torque that the worm wheel can withstand, and overcome the defect that the existing adjustable wrench is easy to loosen.
- the present invention provides a movable wrench including a wrench body and a worm wheel;
- the wrench body includes a handle and a working portion;
- the working portion includes a fixing portion, a movable portion and a sliding slot; and a lower end of the movable portion is disposed in the sliding slot.
- the bottom edge of the lower end of the movable portion is provided with a tooth portion;
- the working portion further includes a through hole, the worm wheel is disposed in the through hole and meshes with the tooth portion; when the worm wheel rotates in the first direction, the worm wheel acts on the tooth portion, thereby driving the activity
- the portion is close to the fixed portion.
- the adjustable wrench further includes a pin shaft and a pin hole, the pin hole is located on the wrench body, and the pin shaft passes through the pin
- the hole is axially disposed in the worm wheel, and the worm wheel is rotatable about the pin shaft; wherein the number of threads of the worm wheel is at least 2; the bump body is provided with a protrusion matched with the worm wheel, and the worm wheel has an irregular shape matched with the protrusion
- the movable wrench further comprises an elastic member, the elastic member is located between the worm wheel and the wrench body, and the elastic member applies a pre-tightening force to the worm wheel, so that the worm wheel cooperates with the convex block, so that the convex block blocks the worm wheel from rotating in the second direction.
- the profiled surface has a plurality of steps which are provided on the end faces of the worm wheel and are evenly distributed in the circumferential direction to form an annular shape.
- the elastic member is a spring, and the spring is sleeved on the pin.
- the thread shape of the worm wheel is a circular arc shape, and the top portion is provided with an oblique angle.
- the through hole has a substantially rectangular cross section, and both sides of the through hole respectively have a T-shaped groove, and the axial end faces of the worm wheel respectively have a boss when the worm wheel is mounted in the through hole The boss is engaged with the T-shaped groove.
- An adjustable wrench includes a wrench body and a worm wheel; the wrench body includes a handle and a working portion; the working portion includes a fixing portion, a movable portion and a sliding slot; a lower end of the movable portion is disposed in the sliding slot, and a bottom edge of the lower end of the movable portion is disposed
- the working portion further includes a through hole, the worm wheel is disposed in the through hole and meshes with the tooth portion; when the worm wheel rotates in the first direction, the worm wheel and the tooth portion act to drive the movable portion to the fixed portion, and the worm wheel When rotating in the two directions, the worm wheel acts on the tooth portion, thereby driving the movable portion away from the fixing portion;
- the adjustable wrench further includes a pin shaft and a pin hole, the pin hole is located on the wrench body, the pin shaft passes through the pin hole, and is axially disposed in the worm wheel The worm wheel is rotatable about the pin shaft; wherein the number of thread
- the elastic member is a spring, and the spring is sleeved on the bump.
- the deformed surface has a plurality of recesses disposed on the outer edge of the end surface of the worm wheel and uniformly distributed in the circumferential direction to form an annular shape.
- one end of the bump is a truncated cone.
- the thread shape of the worm wheel is a circular arc shape, and the top portion is provided with an oblique angle.
- the through hole has a substantially rectangular cross section, and both sides of the through hole respectively have a T-shaped groove, and the axial end faces of the worm wheel respectively have a boss when the worm wheel is mounted in the through hole The boss is engaged with the T-shaped groove.
- An adjustable wrench includes a wrench body and a worm wheel; the wrench body includes a handle and a working portion; the working portion includes a fixing portion, a movable portion and a sliding slot; a lower end of the movable portion is disposed in the sliding slot, and a bottom edge of the lower end of the movable portion is disposed
- the working portion further includes a through hole, the worm wheel is disposed in the through hole and meshes with the tooth portion; when the worm wheel rotates in the first direction, the worm wheel and the tooth portion act to drive the movable portion to the fixed portion, and the worm wheel When rotating in the two directions, the worm wheel acts on the tooth portion, thereby driving the movable portion away from the fixing portion;
- the adjustable wrench further includes a pin shaft and a pin hole, the pin hole is located on the wrench body, the pin shaft passes through the pin hole, and is axially disposed in the worm wheel The worm wheel is rotatable about the pin shaft; wherein the wrench body is
- the deformed surface has a plurality of recesses provided at the end faces of the worm wheel and uniformly distributed in the circumferential direction to form an annular shape.
- the elastic member is located between the worm wheel and the wrench body, and the elastic member applies a preload force to the worm wheel.
- the elastic member is a spring, and the spring is sleeved on the pin.
- the damping mechanism further includes a fastener secured to the threaded bore in the wrench body by a threaded connection, the resilient member being located between the projection and the fastener, the resilient member biasing the projection.
- the elastic member is a spring, and the spring is sleeved on the bump.
- one end of the bump is a truncated cone.
- the worm wheel of the adjustable wrench of the present invention has at least two spiral threads for quick adjustment between the movable part and the fixed part Distance and increase the torque that the worm gear can withstand.
- the adjustable wrench of the present invention solves the technical problem that people have been eager to solve but have never succeeded.
- the pressure generated by the spring of the adjustable wrench of the present invention causes the worm wheel to cooperate with the projection.
- the volute of the worm wheel itself can be avoided, thereby ensuring that the movable portion and the worm wheel can be reliably stressed when the workpiece is clamped.
- the bumps can also increase the resistance of the worm wheel when it is rotated. Therefore, the worm wheel is freely rotated during use of the adjustable wrench, and the adjustable wrench is prevented from becoming loose during use.
- the present invention adjusts the profile of the thread to change the conventional conventional trapezoidal thread to a circular arcuate surface, and the top of the thread is designed to be angled to avoid interference while contacting the worm gear in the movable portion of the wrench
- the top of the tooth on the worm is flattened, so that the worm wheel is close to the worm, so that the joint area between the worm wheel and the worm is increased to enhance the torque transmission of the wrench and improve the reliability of the worm wheel self-locking.
- the present invention adds two T-shaped grooves on both sides of the through hole of the wrench body, and simultaneously adds two bosses on both end faces of the worm wheel, and the torsion force of the worm wheel is strengthened by the cooperation of the boss and the T-shaped groove. Due to the existence of the gap between the components of the wrench, when the wrench is stressed, a certain component force is transmitted to the worm wheel. When the double thread is used, the component force will be larger than that of the conventional single thread, so that the force of the tooth portion is further increased. Increased, the design of the structure can improve the component force of the worm wheel on the one hand, and reduce the precision of the matching between other parts of the wrench.
- FIG. 1 is a front elevational view showing a fixing portion and a movable portion of a first embodiment of the present invention
- Figure 2 is a cross-sectional view taken along line A-A of Figure 1;
- Figure 3 is a plan view of Figure 1;
- Figure 4 is a front elevational view showing the fixing portion of the first embodiment of the present invention separated from the movable portion;
- Figure 5 is a cross-sectional view taken along line A-A of Figure 4.
- Figure 6 is a schematic view showing the worm wheel thread profile of the second embodiment of the present invention.
- Figure 7 is a front elevational view of the slider of the second embodiment of the present invention.
- Figure 8 is a plan view of the slider shown in Figure 7;
- Figure 9 is a schematic structural view of a wrench body according to a third embodiment of the present invention.
- Figure 10 is a schematic view showing the structure of a worm wheel with a boss according to a third embodiment of the present invention.
- Figure 11 is a schematic structural view of a fourth embodiment of the present invention.
- Figure 12 is a perspective view showing a structure of a worm wheel according to a fourth embodiment of the present invention.
- Figure 13 is a bottom plan view of the wrench body of the fifth embodiment of the present invention.
- Figure 14 is an exploded view of a damper mechanism of a fifth embodiment of the present invention.
- the adjustable wrench of the first embodiment of the present invention includes a wrench body and a worm wheel 24, and the wrench body includes a handle 1 And a work department 2 .
- the working portion includes a fixing portion 22, a movable portion 21, and a chute 20.
- the fixing portion 22 is located at the upper end of the wrench body and is located at the side of the wrench body. Chute 20 One end of the fixing portion 22 is adjacent to the lateral direction, and both ends of the chute 20 are open, and a part of the upper end of the chute 20 is also open.
- the lower end of the movable portion 21 is provided in the chute 20 to move in a direction toward or away from the fixed portion 22.
- the lower end of the movable portion 21 includes a neck 27 and slider 28, the slider 28 is located at the bottom end of the neck 27 and is substantially cylindrical.
- the neck 27 and the slider 28 are disposed in the chute 20.
- the bottom edge is provided with a generally semi-circular tooth portion 23 that engages the thread 26 on the worm gear 24.
- the tooth portion 23 constitutes a worm, and its meshing relationship with the worm wheel 24 constitutes a worm wheel. Worm pair.
- the slider 28 can be generally cuboid.
- the slider 28 The shape is not limited to a cylindrical shape or a rectangular parallelepiped shape, and the shape thereof only needs to ensure that the slider 28 smoothly moves in the chute 20.
- the sectional shape of the tooth portion 23 may be any shape such as a triangle or a trapezoid, and only the tooth portion 23 and the worm wheel are required.
- the thread 26 on the 24 can be engaged.
- a through hole 29 is further disposed below the chute 20, and the upper end of the through hole 29 communicates with the chute 20, and the through hole 29
- the cross section is generally rectangular.
- the worm wheel 24 is disposed in the through hole 29, and the thread 26 on the worm wheel 24 has two spirals and meshes with the tooth portion 23 of the bottom edge of the slider 28. Due to the thread of the worm gear 24 26 meshes with the tooth portion 23 of the bottom edge of the slider 28, and when the thumb of the operator rotates the worm wheel 24, the movable portion 21 is driven to face or away from the fixing portion 22 The direction of movement is such that the distance between the movable portion 21 and the fixed portion 22 is adjusted in accordance with the size of the workpiece (e.g., the nut).
- the cross-sectional shape of the through hole 29 may be trapezoidal, circular, or the like, and it is only necessary to ensure that the worm wheel 24 is accommodated therein and the worm wheel is provided.
- the thread 26 of the 24 meshes with the toothing 23 of the bottom edge of the slider 28.
- the adjustable wrench of the first embodiment of the present invention further includes a pin 25 and a pin hole 30.
- the pin hole 30 is located on the wrench body.
- the axial center position of the pin hole 30 coincides with the axial center position of the worm wheel 24.
- the pin 25 passes through the pin hole 30 and is axially bored in the worm wheel 24.
- Worm gear 24 can be wound
- the pin 25 rotates.
- One end of the pin 25 is completely flush with the outlet portion of the pin hole 30.
- the adjustable wrench of the first embodiment of the present invention further includes a spring 31 between the worm wheel 24 and the wrench body.
- Spring 31 One end abuts against the worm wheel 24, and the other end of the spring 31 abuts against the wrench body.
- the pin 25 is also axially passed through the spring 31.
- the tightening torque generated by the thread 26 of the worm gear 24 and the thread of the worm gear 24 The helix angle is proportional to the angle of the helix, and the helix angle is proportional to the number of helices. In the first embodiment, the number of spirals of the worm wheel 24 is two.
- Double thread on the basis of single thread increase the pitch of single-turn thread by increasing the helix angle, but because of the increase of the helix angle, if the single-thread thread is simply changed to the double-line thread by conventional methods, Causing thread 26 and The reliability of the self-locking between the teeth 23 is reduced. When the force is suddenly applied or the force is continuously applied, the thread will retreat to cause the wrench to fail, and even the wrench will slip out of the nut to cause injury to the person.
- the profile of the thread 26 is adjusted on the basis of the double thread of the first embodiment, and the conventional conventional trapezoidal thread is changed to the arcuate surface 261 while In order to avoid the process of rotation
- the thread 26 The top is designed with a bevel 262 to avoid interference, as shown in FIG.
- the worm gear 24 and the tooth portion 23 are caused.
- the reduction in the tooth-shaped contact area causes a reduction in the torque of the wrench.
- the present invention flattens the top of the tooth portion 23 on the worm in contact with the worm gear in the movable portion of the wrench. For the surface 231, the worm wheel is brought closer to the worm.
- the joint area between the worm wheel 24 and the tooth portion 23 is increased to enhance the torque transmission of the wrench.
- the worm wheel 24 is coupled to the wrench body by a cylindrical pin 25, and when the wrench is pulled, its worm wheel 24, tooth portion 23 It is the eccentric force that passes through the tooth 23 It is transmitted to the worm wheel 24, and the worm wheel 24 is movably connected to the rotating shaft 25, and there is a certain gap between the two.
- the torque of the wrench is sufficiently large, the torque may cause deformation of the shaft 25, thereby causing the wrench to fail or the rotation to be unsatisfactory.
- Worm gear 24 placed on the square of the wrench In the through hole 29, the worm wheel 24 and the through hole 29 are clearance-fitted.
- a spring is added to one end of the worm wheel 24, but the clearance fit further causes the tooth portion 23 The force is transmitted to the cylindrical pin 25.
- the through hole 39 of the wrench body is provided.
- Two T-shaped grooves 41 are added on both sides as shown in FIG. 9; at the same time, two bosses 45 are added to both end faces of the worm wheel 34, as shown in FIG.
- the torsion of the worm wheel 34 is enhanced by the cooperation of the boss 45 and the T-shaped groove 41.
- the present invention provides for changing the profile of the threads 26 and flattening the teeth 23
- the top portion enhances the method of torque transmission of the wrench, thereby overcoming the problem of reduced self-locking reliability caused by the double thread in the first embodiment.
- another method is provided to solve this problem in the fourth embodiment of the present invention.
- a bump 40 is added to the wrench body.
- the bump 40 has an end portion 41, and the worm wheel 24 is provided with the end portion 41 of the bump 40. Shaped face 42.
- the movable portion 21 is moved to move toward or away from the fixed portion 22. which is When the worm wheel 24 rotates in the first direction, the worm wheel 24 acts on the tooth portion 23, thereby driving the movable portion 21 to approach the fixed portion 22.
- the worm wheel 24 rotates in the second direction, the worm wheel 24 acts on the tooth portion 23, thereby driving the movable portion. 21 is away from the fixing portion 22.
- the worm wheel 24 cooperates with the bump 40 to increase the resistance experienced by the worm wheel 24 when it rotates, so that the bump 40 blocks the worm wheel 24 from rotating in the second direction, that is, prevents the worm wheel from freely rotating.
- the deformed surface 42 has a plurality of recesses 43 which are provided at the end faces of the worm wheel 24 and are evenly distributed in the circumferential direction to form an annular shape. End 41 of the bump 40 Can be spherical.
- the shape of the end portion 41 is not limited to the spherical surface, and its shape only needs to ensure that the projection engages with the recess 43 on the deformed surface 42 such that the projection 40 prevents the worm wheel 24 from freely rotating in the second direction.
- the number of bumps shown is one, the bumps may also be a plurality of uniforms in a specific implementation.
- the fifth embodiment of the present invention provides another damping structure as compared with the fourth embodiment.
- the first embodiment is removed Located between the worm gear 24 and the wrench body Spring 31.
- a threaded hole 50 (see FIG. 13) is added to the wrench body, and a damping mechanism is disposed in the threaded hole 50.
- the damper mechanism includes a lug 51, a fastener 52, and an elastic member 53 therebetween.
- the elastic member 53 is preferably a spring.
- the fastener 52 is preferably a screw, particularly a slotted headless screw, that is secured in the threaded bore 50 by a threaded connection.
- the worm gear 24 has a profiled surface 55 that can be mated with the lug 51.
- the deformed surface 55 has a plurality of recesses 56 which are provided on the outer edge of the end surface of the worm wheel 24 and are evenly distributed in the circumferential direction to form an annular shape, and have ridges 57 between the adjacent two recesses 56.
- the recess 56 is in contact with the tapered surface on the circular table 54 of the projection 51, so that the projection 51 and the worm wheel 24 can be reliably biased.
- the elastic member 53 applies a preload force to the bump 51 to engage the bump 51 with the worm wheel 24.
- the worm wheel 24 rotates, the worm wheel 24 needs to push the lug 51 to compress the elastic member 53, moving toward the fastener 52.
- the projection 51 hinders the rotation of the worm wheel 24, that is, prevents the worm wheel 24 from freely rotating.
- the fastener 52 is adjusted so that the gap with the bump 51 is small or has no gap, since the recess 56 fits with the tapered surface on the circular table 54 of the bump 51, the worm wheel 24 cannot push the bump 51 to continue.
- the resilient member 53 can also be sleeved over the fastener 52 or between the fastener 52 and the end surface of the bump 51.
- the fourth or fifth embodiment of the present invention can also be combined with the solutions of the second and third embodiments, respectively, to allow the adjustable wrench to enhance the torque transmission of the wrench and to increase the component force that the worm wheel is subjected to.
- Worm gear 24 The number of spirals can also be 1 or 3.
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- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
一种活动扳手,包括一扳手本体和一蜗轮(24);扳手本体包括一手柄(1)和一工作部(2);工作部包括一固定部(22)、一活动部(21)和一滑槽(20);活动部的下端设于滑槽中,活动部的下端的底缘设有齿部(23);工作部还包括一通孔(29),蜗轮设于通孔中,并与齿部啮合;当转动蜗轮时,蜗轮与齿部作用,进而带动活动部朝向或远离固定部移动;蜗轮的螺纹(26)具有至少两条螺旋线。该活动扳手可快速调节活动部与固定部的间距,并增大蜗轮所能承受的扭矩。
Description
技术领域
本发明涉及一种扳手,尤其涉及一种活动扳手。
背景技术
活动扳手一般由扳手本体、蜗轮、销轴、弹簧等构成,是一种旋紧或拧松有角螺丝或螺母的工具。
扳手本体包括一手柄和一工作部。工作部包括一固定部、一活动部和一滑槽。活动部的下端设于滑槽中,以朝向或远离固定部的方向移动。活动部的下端的底缘设有齿部。齿部与蜗轮上的螺纹相啮合。由于蜗轮上的螺纹与活动部下端的底缘的齿部相啮合,转动蜗轮,可带动活动部沿着滑槽以朝向或远离固定部的方向移动。
在现有技术中,蜗轮上的螺纹的螺旋线数为一条,为单线螺纹,转动蜗轮而移动活动部的速度较慢,并且单线螺纹的蜗轮所能承受的扭矩较小。此外,在使用时,由于扳动受力,有时敲击手柄,导致固定部、活动部之间的夹持口会变大造成夹紧变松,使螺丝或螺母的棱角变形受损,严重时造成扳手打滑而不能旋紧或拧松螺丝或螺母。
发明内容
有鉴于现有技术的上述缺陷,本发明所要解决的技术问题是提供一种活动扳手,可快速
调节活动部与固定部的间距,增大蜗轮所能承受的扭矩,并克服现有活动扳手使用中易变松的缺陷。
为实现上述目的,本发明提供了一种活动扳手,包括扳手本体和蜗轮;扳手本体包括手柄和工作部;工作部包括固定部、活动部和滑槽;活动部的下端设于滑槽中,活动部的下端的底缘设有齿部;工作部还包括通孔,蜗轮设于通孔中,并与齿部啮合;当蜗轮向第一方向转动时,蜗轮与齿部作用,进而带动活动部靠近固定部,当蜗轮向第二方向转动时,蜗轮与齿部作用,进而带动活动部远离固定部;活动扳手还包括销轴和销孔,销孔位于扳手本体上,销轴穿过销孔,轴向穿设于蜗轮中,蜗轮可绕销轴转动;其中,蜗轮的螺纹线数至少为2;在扳手本体上设有与蜗轮配合的凸块,蜗轮上具有与凸块配合的异形面,活动扳手还包括弹性件,弹性件位于蜗轮和扳手本体之间,弹性件向蜗轮施加预紧力,使得蜗轮与凸块配合,使凸块阻碍蜗轮向第二方向转动。
进一步地,异形面具有多个台阶,该多个台阶设于蜗轮的端面并沿周向均匀分布,形成环状。
进一步地,弹性件为弹簧,弹簧套设在销轴上。
进一步地,所述蜗轮的螺纹牙型为圆弧形,且顶部设有斜角。
进一步地,所述活动部的下端的底缘的所述齿部的顶部削平。
进一步地,所述通孔的截面大致为矩形,所述通孔的两边分别具有一个T形槽,所述蜗轮的轴向两端面分别具有一个凸台,当所述蜗轮安装在所述通孔内时,所述凸台与所述T形槽配合。
一种活动扳手,包括扳手本体和蜗轮;扳手本体包括手柄和工作部;工作部包括固定部、活动部和滑槽;活动部的下端设于滑槽中,活动部的下端的底缘设有齿部;工作部还包括通孔,蜗轮设于通孔中,并与齿部啮合;当蜗轮向第一方向转动时,蜗轮与齿部作用,进而带动活动部靠近固定部,当蜗轮向第二方向转动时,蜗轮与齿部作用,进而带动活动部远离固定部;活动扳手还包括销轴和销孔,销孔位于扳手本体上,销轴穿过销孔,轴向穿设于蜗轮中,蜗轮可绕销轴转动;其中,蜗轮的螺纹线数至少为2;在扳手本体上的螺纹孔中设有与蜗轮配合的阻尼机构,阻尼机构包括凸块、紧固件和位于两者之间的弹性件,紧固件通过螺纹连接固定在螺纹孔中,蜗轮上具有与凸块配合的异形面,弹性件向凸块施加预紧力,使得蜗轮与凸块配合,使凸块阻碍蜗轮向第二方向转动。
进一步地,弹性件为弹簧,弹簧套设在凸块上。
进一步地,异形面具有多个凹陷,该多个凹陷设于蜗轮的端面外缘并沿周向均匀分布,形成环状。
进一步地,凸块的一端为圆台。
进一步地,所述蜗轮的螺纹牙型为圆弧形,且顶部设有斜角。
进一步地,所述活动部的下端的底缘的所述齿部的顶部削平。
进一步地,所述通孔的截面大致为矩形,所述通孔的两边分别具有一个T形槽,所述蜗轮的轴向两端面分别具有一个凸台,当所述蜗轮安装在所述通孔内时,所述凸台与所述T形槽配合。
一种活动扳手,包括扳手本体和蜗轮;扳手本体包括手柄和工作部;工作部包括固定部、活动部和滑槽;活动部的下端设于滑槽中,活动部的下端的底缘设有齿部;工作部还包括通孔,蜗轮设于通孔中,并与齿部啮合;当蜗轮向第一方向转动时,蜗轮与齿部作用,进而带动活动部靠近固定部,当蜗轮向第二方向转动时,蜗轮与齿部作用,进而带动活动部远离固定部;活动扳手还包括销轴和销孔,销孔位于扳手本体上,销轴穿过销孔,轴向穿设于蜗轮中,蜗轮可绕销轴转动;其中,在扳手本体上设有与蜗轮配合的阻尼机构,阻尼机构包括凸块和弹性件,蜗轮上具有与凸块配合的异形面,弹性件使得蜗轮与凸块配合,使凸块阻碍蜗轮向第二方向转动。
进一步地,异形面具有多个凹陷,该多个凹陷设于蜗轮的端面并沿周向均匀分布,形成环状。
优选地,弹性件位于蜗轮和扳手本体之间,弹性件向蜗轮施加预紧力。
进一步地,弹性件为弹簧,弹簧套设在销轴上。
优选地,阻尼机构还包括紧固件,紧固件通过螺纹连接固定在扳手本体上的螺纹孔中,弹性件位于凸块和紧固件之间,弹性件向凸块施加预紧力。
进一步地,弹性件为弹簧,弹簧套设在凸块上。
进一步地,凸块的一端为圆台。
本发明的活动扳手的蜗轮 的螺纹具有至少两条螺旋线, 可快速调节 活动部与固定部的间
距,并增大蜗轮所能承受的扭矩。本 发明的 活动扳手 解决了人们一直渴望解决但始终未能获得成功 的技术难题。
其次,本发明的活动扳手的弹簧产生的压力使蜗轮与凸块配合,
当操作者不转动蜗轮时,可以避免蜗轮自身的随意转动,从而保证在夹紧工件时,活动部和蜗轮能可靠受力。此外, 凸块还可增大蜗轮转动时所受的阻力,
从而在活动扳手的使用过程中阻碍蜗轮自由回转 ,防止活动扳手在使用中变松。
再次,本发明对螺纹的牙型进行调整,将原先常规的梯型螺纹改为圆弧形的表面,并将螺纹的顶部设计成斜角以避开干涉,同时将扳手活动部分中与蜗轮接触的蜗杆上的齿顶部削平,使得蜗轮向蜗杆靠拢,使蜗轮和蜗杆之间的结合面积加大,以增强扳手扭力传递,并提高蜗轮自锁的可靠性。
另外,本发明在扳手主体的通孔两边增加两个T形槽,同时在蜗轮的两端面增加两凸台,通过该凸台和T形槽的配合来加强蜗轮所承受的扭力。由于扳手各零部件之间间隙的存在,当扳手受力时会有一定的分力传递给蜗轮,当采用双螺纹时该分力会比常规的单线螺纹要大,使齿部的受力进一步加大,该结构的设计,一方面可以提高蜗轮所承受的分力,同时降低了对扳手其他零部件之间配合精度的要求。
以下将结合附图对本发明的构思、具体结构及产生的技术效果作进一步说明,以充分地了解本发明的目的、特征和效果。
附图说明
图1是本发明第一实施例的 固定部与活动部贴合的 主视图;
图2是图1的A-A向剖视图;
图3是图1的俯视图;
图4是本发明第一实施例的 固定部与活动部分离的 主视图;
图5是图4的A-A向剖视图;
图6是本发明第二实施例的蜗轮螺纹牙型示意图;
图7是本发明第二实施例的 滑块的 主视图 ;
图8是图7所示滑块的俯视图;
图9是本发明第三实施例的扳手主体 的结构示意图;
图10是本发明第三实施例的带凸台蜗轮 的结构示意图;
图11是本发明第四实施例的一种结构示意图;
图12是本发明第四实施例的蜗轮的一种结构的立体示意图;
图13是本发明第五实施例的扳手本体的仰视图;
图14是本发明第五实施例的阻尼机构的爆炸图。
具体实施方式
如图1所示, 本发明的 第一实施例的 活动扳手包括 一扳手本体和蜗轮24,扳手本体包括 一手柄 1
和一工作部 2 。工作部包括一固定部 22 、一活动部 21 和一滑槽 20 。固定部 22 位于 扳手本体的上端且位于扳手本体的侧部。 滑槽 20
靠近固定部 22 的一端,且横向延伸,滑槽 20 的两端呈开口状,滑槽 20 的上端的一部分也呈开口状。
活动部 21 的下端设于滑槽 20 中,以朝向或远离固定部 22 的方向移动。活动部 21 的下端包括颈部
27 和滑块 28 ,滑块 28 位于颈部 27 的底端,大致呈圆柱形。颈部 27 和滑块 28 设于滑槽 20 中。在滑块 28
的底缘,设有截面大致呈半圆形的齿部 23 ,与蜗轮 24 上的螺纹 26 相啮合。实际上,齿部 23 构成了 蜗杆,其 与蜗轮 24 间的啮合关系构成蜗轮
蜗杆副。
在本发明的其他实施例中,滑块 28 可以大致呈长方体形。当然,滑块 28
的形状并不限于圆柱形或长方体形,其形状只需保证滑块 28 在滑槽 20 中顺滑地移动即可。
在本发明的其他实施例中,齿部 23 的截面形状可以为三角形、梯形等任意形状,只需保证齿部 23 与蜗轮
24 上的螺纹 26 啮合即可。
在滑槽 20 的下方还设有一通孔 29 ,通孔 29 的上端与滑槽 20 连通,通孔 29
的截面大致呈矩形。蜗轮 24 设于通孔 29 中,蜗轮 24 上的螺纹 26 具有两条螺旋线,并与滑块 28 的底缘的齿部 23 啮合。由于蜗轮 24 的螺纹
26 与滑块 28 底缘的齿部 23 相啮合,当操作者的拇指转动蜗轮 24 时,即会带动活动部 21 以朝向或远离固定部 22
的方向移动,从而根据工件(例如,螺母)的尺寸,调整活动部 21 与固定部 22 的间距。
在本发明的其他实施例中,通孔 29 的截面形状可以为梯形,圆形等,只需保证蜗轮 24 容纳于其中,并使蜗轮
24 的螺纹 26 与滑块 28 底缘的齿部 23 相啮合。
本发明的第一实施例的活动扳手还包括一 销轴25和一销孔30 。 销孔30位于 扳手本体上,
销孔30的轴心位置 与蜗轮 24 的轴心位置重合。 销轴25穿过销孔30, 轴向穿设于蜗轮 24 中。蜗轮 24 可绕
销轴25转动。销轴25的一端与销孔30的出口 部分或完全平齐。
本发明的 第一实施例的 活动扳手还包括一弹簧 31 ,位于蜗轮 24 和扳手本体之间。弹簧 31
的一端抵靠着蜗轮 24 ,弹簧 31 的另一端抵靠着扳手本体。 销轴25也 轴向穿设于弹簧 31 中。当操作者的拇指转动蜗轮 24 时,弹簧 31
产生的压力的方向为活动部 21 远离固定部 22 的方向。通过弹簧 31 的压力,当操作者的拇指不转动蜗轮 24 时,可以避免蜗轮 24
自身的随意转动,从而保证在夹紧工件时,活动部 21 和蜗轮 24 能可靠受力。
蜗轮 24 的螺纹 26 产生的拧紧扭矩与蜗轮 24 的螺纹 26
的螺旋升角成正比,而螺旋升角与螺旋线数成正比。在 第一实施例 中,蜗轮 24 的螺旋线数为 2 。
在 第一实施例 中,
双螺纹在单螺纹的基础上,通过加大螺旋升角来加大单圈螺纹的螺距,但由于加大了螺旋升角,如果直接用常规方法简单的将单线螺纹改为双线螺纹,会造成 螺纹 26 和
齿部 23 之间自锁的可靠性降低,当突然用力或在连续用力的情况下,螺纹会回转后退造成扳手的失效,甚至会使扳手从螺母上滑出造成对人员的伤害。
基于此,在本发明的第二实施例中,在第一实施例的双螺纹的基础上将螺纹26的牙型进行调整,将原先常规的梯型螺纹改为圆弧形的表面261,同时为了避免旋转过程中与
滑块 28 底缘的齿部 23 之间由于齿形的变化而可能会产生的相互干涉,将 螺纹 26
的顶部设计成斜角262以避开干涉,如图6所示。但由于该斜角262的存在会造成蜗轮24与 齿部 23
之间齿形接触面积的减少,造成扳手扭力的降低,为了克服该问题,本发明将扳手活动部分中与蜗轮接触的蜗杆上的齿 部 23 的顶部削平, 成
为表面231,使得蜗轮向蜗杆靠拢,如图7、图8所示,使蜗轮24与 齿部 23 两者间的结合面积加大,以增强扳手扭力传递。
在第一实施例中,蜗轮24是通过一圆柱销25连接到扳手主体上的,当扳手在扳动时,其蜗轮24、 齿部 23
所受的是偏心力,该力通过 齿部 23
传递给蜗轮24,同时蜗轮24与转轴25是活动连接,两者之间会存在一定的间隙。当扳手的扭力足够大时,该扭力可能会造成该轴25的变形,从而使扳手失效,或转动不顺。蜗轮24放在扳手的方形的
通孔 29 内时,蜗轮 24 和该 通孔 29 是间隙配合的,为了减少蜗轮24的晃动,会在蜗轮24的一端加上弹簧,但是该间隙配合会进一步造成 齿部 23
的力传递给了圆柱销25。
为了解决上述问题,本发明的第三实施例中,在扳手主体的 通孔 39
两边增加两个T形槽41,如图9所示;同时在蜗轮34的两端面增加两凸台45,如图10所示。通过该凸台45和T形槽41的配合来加强蜗轮34所承受的扭力。本实施例中,由于扳手各零部件之间间隙的存在,当扳手受力时会有一定的分力传递给蜗轮,当采用双螺纹时该分力会比常规的单线螺纹要大,使
齿部 23 的受力进一步加大,该结构的设计,一方面可以提高蜗轮所承受的分力,同时降低了对扳手其他零部件之间配合精度的要求。
在第二实施例中,本发明提供了改变 螺纹26的牙型以及削平齿 部 23
的顶部来增强扳手扭力传递的方法,以此克服第一实施例中双螺纹导致的自锁可靠性降低的问题。对此,在本发明的第四实施例中提供另外一种方法解决此问题。
在本发明的第四实施例中,在扳手本体上增加凸块40,如图11所示,该凸块40具有端部41,同时在蜗轮24上设有与凸块40的端部41配合的异形面42。由于
当操作者转动蜗轮 24 时,会带动活动部 21 以朝向或远离固定部 22 的方向移动。即
当蜗轮24向第一方向转动时,蜗轮24与齿部23作用,进而带动活动部21靠近固定部22,当蜗轮24向第二方向转动时,蜗轮24与齿部23作用,进而带动活动部21远离固定部22。
因此
当弹簧31向蜗轮24施加预紧力时,蜗轮24与凸块40配合,增加蜗轮24转动时受到的阻力,使得凸块40阻碍蜗轮24向第二方向转动,即防止蜗轮自由回转。如图12所示,异形面42具有多个凹陷43,该多个凹陷43设于蜗轮24的端面并沿周向均匀分布,形成环状。凸块40的端部41
可以为球面。当然, 端部41 的形状并不限于球面,其形状只需保证凸块与异形面 42 上的凹陷 43 配合使得 凸块40阻碍蜗轮24向第二方向自由转动即可 。
虽然图示的凸块为一个,但具体实施时凸块也可为均布的多个。
与第四实施例相比,本发明的第五实施例提供了另一种阻尼结构。在本发明的第五实施例中去除了第一实施例中
位于蜗轮 24 和扳手本体之间的
弹簧31。在扳手本体上增加了螺纹孔50(见图13),螺纹孔50中设置有阻尼机构。如图14所示,该阻尼机构包括凸块51、紧固件52和位于两者之间的弹性件53。弹性件53优选为弹簧。紧固件52优选为螺钉,特别是开槽无头螺钉,通过螺纹连接固定在螺纹孔50中。凸块51靠近蜗轮24的一端为圆台54,另一端直径较小,使得弹性件53可以套设在凸块51上。蜗轮24具有可以与凸块51配合的异形面55。该异形面55具有多个凹陷56,这多个凹陷56设于蜗轮24的端面外缘并沿周向均匀分布,形成环状,相邻的两个凹陷56间具有脊部57。凹陷56与凸块51的圆台54上的锥面贴合,使得凸块51与蜗轮24能可靠受力。当蜗轮24静止时,弹性件53对凸块51施加预紧力,使凸块51与蜗轮24配合。当蜗轮24转动时,蜗轮24需要推动凸块51压缩弹性件53,朝向紧固件52运动。此时凸块51阻碍蜗轮24转动,也即防止蜗轮24自由回转。当调整紧固件52使得与凸块51之间的间隙较小或没有间隙时,由于凹陷56与凸块51的圆台54上的锥面贴合,此时蜗轮24无法推开凸块51继续转动。在其他实施例中,弹性件53也可以套设在紧固件52上或位于紧固件52与凸块51的端面之间。
本发明的第四或第五实施例也可以分别与第二和第三实施例的方案结合使活动扳手增强扳手扭力传递以及提高蜗轮所承受的分力。 蜗轮 24
的螺旋线数也可以为 1 或 3 。
以上详细描述了本发明的较佳具体实施例。应当理解,本领域的普通技术无需创造性劳动就可以根据本发明的构思作出诸多修改和变化。因此,凡本技术领域中技术人员依本发明的构思在现有技术的基础上通过逻辑分析、推理或者有限的实验可以得到的技术方案,皆应在本发明的权利要求保护范围内。
Claims (20)
- 一种活动扳手,包括扳手本体和蜗轮;所述扳手本体包括手柄和工作部;所述工作部包括固定部、活动部和滑槽;所述活动部的下端设于滑槽中,所述活动部的下端的底缘设有齿部;所述工作部还包括通孔,所述蜗轮设于所述通孔中,并与所述齿部啮合;当所述蜗轮向第一方向转动时,所述蜗轮与所述齿部作用,进而带动所述活动部靠近所述固定部,当所述蜗轮向第二方向转动时,所述蜗轮与所述齿部作用,进而带动所述活动部远离所述固定部;所述活动扳手还包括销轴和销孔,所述销孔位于所述扳手本体上,所述销轴穿过所述销孔,轴向穿设于所述蜗轮中,所述蜗轮可绕所述销轴转动;其中,所述蜗轮的螺纹线数至少为2;在所述扳手本体上设有与所述蜗轮配合的凸块,所述蜗轮上具有与所述凸块配合的异形面,所述活动扳手还包括弹性件,所述弹性件位于所述蜗轮和所述扳手本体之间,所述弹性件向所述蜗轮施加预紧力,使得所述蜗轮与所述凸块配合,使所述凸块阻碍所述蜗轮向第二方向转动。
- 如权利要求1所述的活动扳手,其特征在于,所述异形面具有多个凹陷,该多个凹陷设于所述蜗轮的端面并沿周向均匀分布,形成环状。
- 如权利要求2所述的活动扳手,其特征在于,所述弹性件为弹簧,所述弹簧套设在所述销轴上。
- 如权利要求1所述的活动扳手,其特征在于:所述蜗轮的螺纹牙型为圆弧形,且顶部设有斜角。
- 如权利要求4所述的活动扳手,其特征在于:所述活动部的下端的底缘的所述齿部的顶部削平。
- 如权利要求1所述的活动扳手,其特征在于:所述通孔的截面大致为矩形,所述通孔的两边分别具有一个T形槽,所述蜗轮的轴向两端面分别具有一个凸台,当所述蜗轮安装在所述通孔内时,所述凸台与所述T形槽配合。
- 一种活动扳手,包括扳手本体和蜗轮;所述扳手本体包括手柄和工作部;所述工作部包括固定部、活动部和滑槽;所述活动部的下端设于滑槽中,所述活动部的下端的底缘设有齿部;所述工作部还包括通孔,所述蜗轮设于所述通孔中,并与所述齿部啮合;当所述蜗轮向第一方向转动时,所述蜗轮与所述齿部作用,进而带动所述活动部靠近所述固定部,当所述蜗轮向第二方向转动时,所述蜗轮与所述齿部作用,进而带动所述活动部远离所述固定部;所述活动扳手还包括销轴和销孔,所述销孔位于所述扳手本体上,所述销轴穿过所述销孔,轴向穿设于所述蜗轮中,所述蜗轮可绕所述销轴转动;其中,所述蜗轮的螺纹线数至少为2;在所述扳手本体上的螺纹孔中设有与所述蜗轮配合的阻尼机构,所述阻尼机构包括凸块、紧固件和位于两者之间的弹性件,所述紧固件通过螺纹连接固定在所述螺纹孔中,所述蜗轮上具有与凸块配合的异形面,所述弹性件向所述凸块施加预紧力,使得所述蜗轮与所述凸块配合,使所述凸块阻碍所述蜗轮向第二方向转动。
- 如权利要求7所述的活动扳手,其特征在于,所述弹性件为弹簧,所述弹簧套设在所述凸块上。
- 如权利要求7所述的活动扳手,其特征在于,所述异形面具有多个凹陷,该多个凹陷设于所述蜗轮的端面外缘并沿周向均匀分布,形成环状。
- 如权利要求9所述的活动扳手,其特征在于,所述凸块的一端为圆台。
- 如权利要求7所述的活动扳手,其特征在于:所述蜗轮的螺纹牙型为圆弧形,且顶部设有斜角。
- 如权利要求11所述的活动扳手,其特征在于:所述活动部的下端的底缘的所述齿部的顶部削平。
- 如权利要求7所述的活动扳手,其特征在于:所述通孔的截面大致为矩形,所述通孔的两边分别具有一个T形槽,所述蜗轮的轴向两端面分别具有一个凸台,当所述蜗轮安装在所述通孔内时,所述凸台与所述T形槽配合。
- 一种活动扳手,包括扳手本体和蜗轮;所述扳手本体包括手柄和工作部;所述工作部包括固定部、活动部和滑槽;所述活动部的下端设于滑槽中,所述活动部的下端的底缘设有齿部;所述工作部还包括通孔,所述蜗轮设于所述通孔中,并与所述齿部啮合;当所述蜗轮向第一方向转动时,所述蜗轮与所述齿部作用,进而带动所述活动部靠近所述固定部,当所述蜗轮向第二方向转动时,所述蜗轮与所述齿部作用,进而带动所述活动部远离所述固定部;所述活动扳手还包括销轴和销孔,所述销孔位于所述扳手本体上,所述销轴穿过所述销孔,轴向穿设于所述蜗轮中,所述蜗轮可绕所述销轴转动;其中,在所述扳手本体上设有与所述蜗轮配合的阻尼机构,所述阻尼机构包括凸块和弹性件,所述蜗轮上具有与所述凸块配合的异形面,所述弹性件使得所述蜗轮与所述凸块配合,使所述凸块阻碍所述蜗轮向第二方向转动。
- 如权利要求14所述的活动扳手,其特征在于,所述异形面具有多个凹陷,该多个凹陷设于所述蜗轮的端面并沿周向均匀分布,形成环状。
- 如权利要求15所述的活动扳手,其特征在于,所述弹性件位于所述蜗轮和所述扳手本体之间,所述弹性件向所述蜗轮施加预紧力。
- 如权利要求16所述的活动扳手,其特征在于,所述弹性件为弹簧,所述弹簧套设在所述销轴上。
- 如权利要求14所述的活动扳手,其特征在于,所述阻尼机构还包括紧固件,所述紧固件通过螺纹连接固定在所述扳手本体上的螺纹孔中,所述弹性件位于所述凸块和所述紧固件之间,所述弹性件向所述凸块施加预紧力。
- 如权利要求18所述的活动扳手,其特征在于,所述弹性件为弹簧,所述弹簧套设在所述凸块上。
- 如权利要求18所述的活动扳手,其特征在于,所述凸块的一端为圆台。
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CN105479380B (zh) * | 2015-12-28 | 2017-05-31 | 扬州工业职业技术学院 | 防松动活动扳手 |
CN108058117A (zh) * | 2016-11-07 | 2018-05-22 | 杭州巨星科技股份有限公司 | 一种活动扳手 |
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CN204505103U (zh) * | 2015-04-14 | 2015-07-29 | 杭州巨星科技股份有限公司 | 蜗轮夹持防松结构及防松活络扳手 |
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CN101386157A (zh) * | 2007-09-15 | 2009-03-18 | 王建鹏 | 快速夹紧活扳手 |
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EP4063072A4 (en) * | 2019-10-24 | 2023-09-20 | Hangzhou United Tools Co., Ltd. | ADJUSTABLE WRENCH |
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