WO2012079234A1 - 弹簧夹 - Google Patents

弹簧夹 Download PDF

Info

Publication number
WO2012079234A1
WO2012079234A1 PCT/CN2010/079841 CN2010079841W WO2012079234A1 WO 2012079234 A1 WO2012079234 A1 WO 2012079234A1 CN 2010079841 W CN2010079841 W CN 2010079841W WO 2012079234 A1 WO2012079234 A1 WO 2012079234A1
Authority
WO
WIPO (PCT)
Prior art keywords
friction pair
friction
spring clip
clip
pair
Prior art date
Application number
PCT/CN2010/079841
Other languages
English (en)
French (fr)
Inventor
李跃明
Original Assignee
杭州巨星科技股份有限公司
杭州巨星工具有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 杭州巨星科技股份有限公司, 杭州巨星工具有限公司 filed Critical 杭州巨星科技股份有限公司
Priority to CA2821988A priority Critical patent/CA2821988C/en
Priority to PCT/CN2010/079841 priority patent/WO2012079234A1/zh
Priority to US13/582,063 priority patent/US9027913B2/en
Priority to EP10860734.2A priority patent/EP2653266B1/en
Publication of WO2012079234A1 publication Critical patent/WO2012079234A1/zh

Links

Images

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
    • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/14—Locking means
    • 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
    • B25B25/00—Implements for fastening, connecting or tensioning of wire or strip
    • 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
    • B25B5/00—Clamps
    • B25B5/04—Clamps with pivoted jaws
    • 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
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • 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
    • B25B5/00—Clamps
    • B25B5/16—Details, e.g. jaws, jaw attachments
    • B25B5/163—Jaws or jaw attachments
    • 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
    • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/06—Joints
    • 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
    • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/14—Locking means
    • B25B7/16—Locking means combined with means for tightening the operating arms of jaws

Definitions

  • the invention relates to the technical field of mechanical tools, in particular to a spring clip which can be steplessly adjusted.
  • the opening of the jaw needs to be adjusted according to the size of the object to be clamped. In the work, it is better to fix the opening. In order to facilitate the fixed adjustment of the opening degree, a large number of spring clips having a locking mechanism have been known in the prior art.
  • U.S. Patent No. 6,708,587, B1 discloses a spring clip, which is disposed on an outer side of the caliper handle and can be operated by a thumb, which simplifies the labor of the hand, but adopts a technical solution of providing a rack on the caliper handle to achieve stepwise adjustment. .
  • the spring clip disclosed in US Pat. No. 6,860,179 B2 and US Pat. No. 7,406,897 B2 has a control member disposed on the inner side of the caliper handle and can be operated by the index finger or the ring finger, and has good maneuverability.
  • the locking mechanism includes an elongated strip and a pivotable locking rod. One end of the clip is pivotally mounted on the grip and the other end extends toward the grip.
  • the strip is an arcuate strip of plate and is arranged parallel to the pivot, i.e. the center of the arc of the strip is at the pivot.
  • the locking bar can be pivoted and has an elongated opening near one end of the pivot shaft.
  • the clip can slide through the opening.
  • the other end of the locking bar is held by a spring.
  • the spring pressure causes the opening to be offset relative to the clip, and the edge of the arc-shaped strip is rubbed against the edge of one or both ends of the opening to achieve locking.
  • the spring pressure is overcome, the locking lever is pressed, and the edge of the clip is out of contact with the edge of the opening to achieve release.
  • the friction surface of the edge of the strip and the end edges of the opening is substantially parallel to the pivot. Because the clip strip is thin, the contact between the edge and the edge of the end of the opening can only be a point contact or a short line contact, which is easy to be excessively worn. In use, the reliability of the locking function is gradually reduced or even worn. To a certain extent, the locking mechanism can be completely defeated, and the entire spring clip is scrapped. Even with the improved technical solution disclosed in US Pat. No. 6,860,179 B2, the edges of the strip and the ends of the opening are rounded, and excessive wear is still not completely avoided. Therefore, such spring clips have higher requirements on the material of the clip and the opening of the locking rod, resulting in an increase in cost.
  • the clamp strip must be made into a circular arc shape, and its shape and dimensional precision processing requirements are high; the opening length direction also has high dimensional precision processing requirements, which directly causes cost increase.
  • U.S. Patent No. 7,107,881, B1 discloses a spring clip in which a rod is disposed in a vertical direction in a body thereof, and the rod is locked or released by an L-shaped member to fix the opening. Since a part of the L-shaped element protrudes beyond the main body, the other hand is required for the adjustment, which reduces the degree of freedom of the hand and is less convenient to use. Moreover, the friction surface of the rod and the L-shaped element is substantially parallel to the pivot axis, and the above-mentioned excessive wear and the reliability of the long-term use locking function are also reduced, and the material requirements are high, resulting in an increase in cost.
  • the technical problem to be solved by the present invention is to provide a spring clip which can be adjusted steplessly, has good convenience, can be used reliably for a long period of time, and has low cost and can be steplessly adjusted.
  • the present invention provides a spring clip including a first body including a grip portion and a grip portion; a second body including a grip portion and a grip portion; the first body and the second body a first pivot member pivotally coupled to the body; and a locking mechanism comprised of at least one pair of friction pair members; the friction pair member being centered, the first friction pair member being disposed on the first body, a first friction pair member; the second friction pair member is disposed on the second body, and includes a second friction pair member; the first and second friction pair members of the pair of friction pair members rub against each other a locking action; wherein the friction pair element frictionally occurs primarily in a plane perpendicular to the axis of the first pivot element.
  • the spring clip of the present invention places the pair of friction pair elements in contact in a plane perpendicular to the axis of the first pivot member and friction. Since the plane is relatively large, the contact portion can be set to a long line contact or even a surface contact, and the amount of wear between the pair of friction pair elements is small. Therefore, the material of the friction pair component is required to be low, and it can be used reliably for a long time, and the cost is low.
  • the locking mechanism further includes an unlocking mechanism for controlling the disengagement between the first and second friction sub-elements, and releasing the first and second friction sub-elements The lock between.
  • the unlocking mechanism may further include an operating handle that functions to release the locking between the first and second frictional sub-elements by pressing the operating handle with a finger.
  • the first friction sub-member is fixedly disposed on the first body.
  • the second friction sub-member is fixedly disposed on the second body.
  • the first friction sub-element is an elongated sheet having at least one major surface lying in a plane substantially perpendicular to the axis of the first pivot member, as The friction surface that the second friction pair element contacts.
  • the spring clip of the present invention has a sheet-shaped first friction pair element surface as a friction surface contacting the second friction pair element, and the contour shape of the sheet element is not required to be high, and may be a circular arc shape or a rectangular shape. Or other strip shapes, the dimensional tolerances in the width direction of the sheet member are not high, and the processing cost is reduced.
  • the second friction pair member is a needle roller, a wedge block or an eccentric cam and a sheet-shaped first friction pair member constitutes a pair of friction pair members.
  • the plurality of needle rollers, wedge blocks or eccentric cams and the sheet-shaped first friction pair members form a plurality of pairs of friction pair members to collectively function as a lock.
  • the second friction sub-element is at least one needle roller
  • the second friction sub-assembly includes: a clamping block through which the first friction sub-element can penetrate, and opposite sides of the clamping block are provided with strip-shaped holes, and the strip-shaped holes are provided with at least a needle roller having one end exposed to the strip hole; after the first friction pair member penetrates the clip, the strip hole forms an angle with the first friction pair member to make the strip shape
  • the needle roller in the hole has a contact or disengagement state with the first friction sub-element; and a needle retaining ring is disposed on the outer side of the collet by an elastic member to limit the axial direction of the needle roller Degree of freedom, and under the action of the elastic member, the needle roller is pushed in the strip hole to move in contact with the first friction pair member; the working portion of the steering handle is rotatable The needle is pushed to move in the strip hole away from the first friction sub-element.
  • the second friction sub-element is at least one wedge block
  • the second friction sub-assembly includes: a clamping block that the first friction sub-element can penetrate, and opposite sides of the clamping block are provided with a wedge-shaped block guiding groove, and the wedge-shaped block guiding groove is disposed a wedge block having at least one end exposed to the wedge block guide groove; after the first friction pair element penetrates the clip block, the wedge block guide groove forms an angle with the first friction pair element to enable an angle
  • the wedge block in the wedge block guide has contact or disengagement from the first friction pair member; and a wedge block retaining ring disposed on the outside of the block by an elastic member to limit the An axial degree of freedom of the wedge block and, under the action of the elastic element, can push the wedge block to move in the direction of contacting the first friction pair element in the wedge block guide; the operation of the steering handle
  • the portion can push the wedge block to move in the wedge block guide groove in a direction away from the first friction pair member during the rotation.
  • the second friction sub-element is at least one eccentric cam
  • the second friction pair member includes: a clamping block through which the first frictional pair member can penetrate; and a cam pivotally disposed on the clamping block by a torsion spring; the first friction pair After the component penetrates into the clamping block, the rotation of the cam causes the cam to contact or disengage from the first frictional sub-element; and the operating handle is integrally formed with the cam, and the rotation of the steering handle can be The cam is pushed out of the first friction pair element.
  • a pivotal connection between the first body and the second body is located in a middle portion of the first body and the second body, so that the first body and the first body
  • the grip portion and the clamping portion of the two bodies are respectively located at two sides of the pivotal joint of the first body and the second body.
  • the pivotal connection between the first body and the second body is located at an end of the first body and the second body, so that the holding portion and the clamping portion of the first body and the second body The portion is located on the same side of the pivotal connection of the first body and the second body.
  • the first body and/or the second body have a semi-open cavity therein, and the friction pair is disposed in the cavity.
  • the operating handle may be disposed in the cavity, at least a portion of the operating handle being located outside of the cavity when in the clamped state.
  • the operating handle is disposed on the inner side of the main body and mainly in the cavity of the main body, the operation of the operating handle by the user is convenient, and the convenience of the spring clip is greatly improved.
  • the first friction element member may have a circular arc shape; further, the thickness thereof is substantially uniform.
  • the operating handle is integrally formed with the second friction pair member.
  • the clamping portion of the first body and/or the second body is provided with a movable collet.
  • part or all of the first body and the second body are coated with a soft coating layer.
  • the first pivot member that couples the first body and the second body has a torsion spring for the first body and the A tension is applied between the second bodies.
  • FIG. 1 is a schematic view showing a first working state structure (self-locking state) according to Embodiment 1 of the present invention
  • Figure 2 is a schematic view showing the structure of the second working state (to be clamped) of the embodiment shown in Figure 1.
  • Figure 3 is a schematic cross-sectional view of the locking mechanism of the embodiment shown in Figure 1 taken along line A-A;
  • Figure 4 is a schematic cross-sectional view of the locking mechanism of the second embodiment of the present invention taken along line A-A;
  • Figure 5 is a cross-sectional view showing the structure of the locking mechanism according to Embodiment 3 of the present invention taken along line A-A;
  • Figure 6 is a schematic cross-sectional view of the locking mechanism of Embodiment 4 of the present invention taken along line A-A;
  • Figure 7 is a schematic structural view of Embodiment 5 of the present invention.
  • Figure 8 is a schematic structural view of the locking mechanism and the unlocking mechanism of the embodiment shown in Figure 7;
  • Figure 9 is a cross-sectional view of the second friction sub-assembly of the embodiment shown in Figure 7 taken along line C-C;
  • Figure 10 is a schematic view showing the structure of the locking mechanism of the embodiment shown in Figure 7 along the C-C section;
  • Figure 11 is a cross-sectional view of the locking mechanism and the unlocking mechanism of the embodiment shown in Figure 7 taken along line B-B;
  • Figure 12 is a diagram showing the force analysis of the needle roller in the second working state of the embodiment shown in Figure 2;
  • Figure 13 is a diagram showing the force analysis of the needle roller in the first working state of the embodiment shown in Figure 1.
  • a particular embodiment of the spring clip of the present invention includes a first body 10, a second body 20, and pivotally coupled first body 10 and second body 20 together.
  • the first body 10 and the second body 20 respectively include grip portions 102, 202 and grip portions 101, 201.
  • the clamping portions of the two bodies 10, 20 may also be provided with movable jaws respectively for facilitating clamping.
  • the first pivot shaft 6 is made of a screw, a bolt, a rivet or the like, and is located at a middle portion of the first body 10 and the second body 20, and the lower half of the first body 10 and the second body 20 may be respectively formed with a semi-open cavity. It can also be coated with a soft coating such as leather, artificial leather, plastic or rubber.
  • the spring clip of the present invention also includes a locking mechanism.
  • the locking mechanism includes a pair of friction pair members, wherein the first friction pair member is disposed on the first body 10, that is, the clip 32 in the drawing; the second friction pair member 31 is disposed on the second body 20, by the block 301.
  • the needle roller 51, the needle roller fixing ring 52 and the elastic member 53 are composed.
  • the clip 32 is an elongated sheet having two opposing major surfaces, at least one of which is located in a plane substantially perpendicular to the axis of the first pivot 6.
  • the thickness of the clip 32 is substantially uniform.
  • a channel 311 is defined in the middle of the clamping block 301.
  • One end 321 of the clip 32 is fixedly disposed on the first body 10, and the other free end 322 is opposite to the clip 301, and can penetrate the channel 311.
  • the free end 322 is a first frictional secondary element.
  • the clamp block 301 is fixedly disposed on the second body 20 (not shown).
  • Stripe holes 50 are provided on both sides of the clamp block 301, and the strip holes 50 form an angle with the clip free end 322.
  • a needle roller 51 whose both ends are exposed to the strip hole 50 is provided in the strip hole 50.
  • This needle roller 51 constitutes a second friction pair element.
  • An elastic member 53 is disposed outside the clamp block 301, and the needle roller 51 is pushed by a needle retaining ring 52 to move along the strip hole 50 toward the free end 322 of the clip.
  • the needle retaining ring 52 simultaneously serves to limit the axial freedom of the needle roller 51.
  • the needle 51 in the strip hole 50 has an adjustable spacing between the free end 322 of the clip.
  • the clip free end 322 slides freely within the passage 311, pushing the needle roller 51 against the pressure of the elastic member 53, and the needle roller 51 is directed away from the clip.
  • the direction of the free end 322 is moved, and the grip portion of the spring clip can be freely moved in one direction in the pressing direction, so that the clamping portion of the spring clip reaches the position where the object to be clamped is caught.
  • Figure 12 shows how it works.
  • the elastic force F of the elastic member 53 can be decomposed into a tangential Fx and a normal Fy at the contact surface of the strip hole and the needle 51.
  • Fx causes the needle to move counterclockwise. Pressing the two grip portions of the spring clip is equivalent to pushing the clip free end 322 into the channel 311 (from left to right in the figure).
  • the needle roller 51 is subjected to the frictional force of the clip free end 322, and also has a tendency to rotate counterclockwise. That is, the clip free end 322 can be freely left to right with the counterclockwise rotation of the needle 51. Move to.
  • the included angle should be greater than the self-locking angle of the bevel to avoid self-locking.
  • the size of the self-locking angle is related to the coefficient of friction between the clip and the needle.
  • the locking mechanism can also include an unlocking mechanism.
  • the unlocking mechanism includes an operating handle 40 that is disposed on the second body 20 by a torsion spring 42 that is rotatable for controlling disengagement between the jaw block 301 and the clip 32.
  • the working portion 41 of the operating handle 40 provides a driving force for pushing the needle roller 51 in the strip hole 50 in a direction away from the clip free end 322 during the rotation of the operating handle 40 as a reaction force of the above-described elastic member 53.
  • a thrust force capable of overcoming the elastic force of the elastic member 53 is applied to the needle retaining ring 52 (the operating handle is not shown).
  • the needle roller 51 returns to the relaxed state, the clip 32 is released to unlock, and the free end 322 is free to slide within the passage 311.
  • the spring clip is in a closed state, and there is no force on the operating handle 40.
  • the elastic member 53 pushes the needle retaining ring 52 to push the needle 51 to the strip hole 50 near the clip 32. Due to the friction between the needle 51 and the clip 32, the clip 32 is locked and the spring clip is held. Stable closed state.
  • the elastic force F of the elastic member 53 can be decomposed into a tangential Fx and a normal Fy at the contact surface of the strip hole and the needle 51. Fx causes the needle to move counterclockwise.
  • the needle 51 is subjected to the frictional force of the clip free end 322, which will result The trend of movement in a clockwise direction.
  • the two force interactions cause the needle roller 51 to move only in the direction of the free end 322 of the clip, so that the greater the force of the spring clip, the greater the pressure it provides to the free end 322 of the clip.
  • the purpose of clamping the clip free end 322. thus, the needle roller 51 and the clip 32 are locked more firmly. Therefore, the present invention realizes the self-locking of the first body 10 and the second body 20 by the above simple structure.
  • the needle roller 51 pushes the thrust of the elastic member 53 against the thrust of the elastic member 53 due to the action of the working portion 41 on the operating handle 40, and is moved away in the strip hole 50.
  • the direction of the clip 32 moves.
  • the needle roller 51 comes out of contact with the clip 32, the frictional force disappears, the clip 32 is released, the first body 10 can be pulled, and the clamp portions 101, 201 are opened by the torsion spring 42.
  • the user only needs to press the operation handle 40 with one finger of the same hand, so the invention has the advantages of simple control and one-hand operation.
  • the opening degree of the spring clip is maintained in a stable state, which is convenient for the operator to use.
  • the operation of the needle roller 51 on the clip 32 is achieved by pushing the needle roller 51 in two opposite directions by the operation handle 40 or the needle retaining ring 52. Tight or detachment realizes the technical purpose of stepless adjustment of the opening degree of the spring clip, and improves the applicable performance of the spring clip.
  • the pair of friction pair members of the needle roller 51 and the clip 32 are disposed to be in contact with the surface of the clip 32 and friction is generated. Since the plane is relatively wide, the contact portion can be set to a long line contact, and the amount of wear between the needle roller 51 and the clip 32 is small. Therefore, the material of the friction pair component is required to be low, and it can be used reliably for a long time, and the cost is low.
  • the surface of the clip 32 is used as a friction surface in contact with the needle roller 51, and the contour shape of the clip 32 is not required to be high. It may be a circular arc shape, or may be a rectangular shape or other long strip shape, and the clips may be clipped. The dimensional tolerances in the width direction of 32 are not high, which reduces the processing cost.
  • the lower portion of the first body 10 and the second body 20 also has a semi-open cavity. Also, one end of the clip 32 is disposed in the cavity of the first body 10, and the clip 301 is disposed in the cavity of the second body 20.
  • the operating handle 40 is disposed in the cavity of the second body 20, and at least a portion of the operating handle 40 is located outside of the cavity in the clamped state to facilitate pressing.
  • Another embodiment of the spring clip of the present invention has a structure similar to that of Embodiment 1, except for its locking mechanism. As shown in Fig. 4, two sets of strip holes 50 and 50' are provided in the clamping block 301 of the locking mechanism. Two needle rollers 51 and 51' whose both ends are exposed to the strip holes are provided in the strip holes. The needle roller 51 and the clip free end 322 form a pair of friction pair elements, and the needle 51' Another set of friction pair elements is formed with the clip free end 322. The two sets of friction pair elements cooperate to achieve the stepless locking function of the spring clip of the present invention.
  • Another embodiment of the spring clip of the present invention has a structure similar to that of Embodiment 1, except that the second friction pair member of the locking mechanism is replaced with a new second friction pair member 131, as shown in FIG.
  • the clamp block 1301, the wedge block 151, the wedge block retaining ring 152 and the elastic member 153 are composed.
  • a wedge block guide groove 150 is disposed on both sides of the clamp block 1301, and a wedge block 151 having both ends exposed to the wedge block guide groove 150 is disposed in the wedge block guide groove 150.
  • the wedge block 151 constitutes a second friction pair element.
  • An elastic member 153 is disposed outside the clamp block 1301, and the wedge block 151 is pushed by the wedge block retaining ring 152 to move along the wedge block guide groove 150 toward the free end 322 of the clip.
  • the wedge block retaining ring 152 simultaneously serves to prevent the wedge block 151 from falling from the wedge block guide groove 150.
  • the contact portion of the embodiment is arranged in surface contact, the amount of wear between the pair of friction pair elements is smaller, the material requirement for the friction pair element is lower, the long-term reliable use is possible, and the cost is lower.
  • Another embodiment of the spring clip of the present invention has a structure similar to that of Embodiment 3, except that, as shown in Fig. 6, two sets of wedge block guide grooves 150 and 150' are provided in the clamp block 1301 of the lock mechanism. Two wedge-shaped blocks 151 and 151' which are exposed at both ends to the wedge-shaped guide groove are provided in the wedge-shaped guide groove.
  • the wedge block 151 and the clip free end 322 form a pair of friction pair elements, and the wedge block 151' and the clip free end 322 form another set of friction pair elements.
  • the two sets of friction pair elements cooperate to achieve the stepless locking function of the spring clip of the present invention.
  • FIG. 1 Another embodiment of the spring clip of the present invention is similar in construction to Embodiment 1 and also includes a first body 10 and a second body 20 for pivotally coupling the first body 10 and the second body 20 together.
  • the first body 10 and the second body 20 respectively include grip portions 102, 202 and grip portions 101, 201.
  • the difference is that the unlocking mechanism in the locking mechanism is mounted with the second friction pair, and in particular, the operating handle can be integrally formed with the second friction pair.
  • the locking mechanism includes a pair of friction pair members, wherein the first friction pair member is disposed on the first body 10, that is, the clip 32 in the drawing; and the second friction pair member 231 is disposed.
  • the second body 20 On the second body 20, it consists of a clamp 2301, a cam 141, a torsion spring 142, and a shaft 143.
  • the clip 2301 is a semi-open "[" groove type structure fixedly disposed on the second body 20.
  • a hole 250 is formed on both sides of the clip 2301, and a shaft 143 is disposed.
  • the cam 141 is disposed on the shaft 143 by a torsion spring 142 that is fitted over the shaft 143.
  • This cam 141 constitutes a second friction pair element.
  • the working surface of the cam 141 is at least a portion of a cylindrical surface whose axis is offset from the rotational axis 143 of the cam 141.
  • the bus bar closest to the bottom surface of the grooved recess of the clamp 2301 on the working surface of the cam 141 is defined as the cam outer edge 1411.
  • the grooved recess of the clamp 2301 forms a passage 2311 with the cam 141.
  • the four walls of the passage 2311 are: two side walls 2301 and 2303 of the oppositely formed groove-shaped recesses, oppositely defined groove-shaped recessed bottom surfaces 2302 and cam outer edges 1411.
  • the clip 32 is an elongated sheet having two opposing major surfaces 3201 and 3202, at least one of which is located in a plane substantially perpendicular to the axis of the first pivot 6.
  • the thickness of the clip 32 is uniform.
  • One end 321 of the clip 32 is fixedly disposed on the first body 10, and the other free end 322 is opposite to the clip 2301, and can penetrate into the channel 2311, and penetrates one main surface of the clip 32 and the groove of the channel 2311 when penetrating.
  • the bottom surface 2302 is substantially parallel.
  • the free end 322 is a first frictional secondary element.
  • the height of the passage 2311 is defined by the two side walls 2301 and 2303. This height setting is related to the outer contour of the free end 322 of the clip 32 that is perpendicular to the major surface.
  • the outer contour is an arc centered on the first pivot 6, the height is a minimum.
  • the outer end shape of the free end 322 can be other shapes, such as a rectangle, which can be appropriately increased accordingly to conform to the outer contour shape of the free end 322.
  • the width of the passage 2311 is defined by the grooved recessed bottom surface 2302 and the cam outer edge 1411.
  • the cam 141 rotates on the shaft 143, the position of the cam outer edge 1411 moves left and right as the cam 141 rotates, so that the width of the passage 2311 changes correspondingly, and the cam 141 has contact with or disengages from the clip 32. State, thereby clamping or loosening the free end 322 of the clip 32 that penetrates the channel 2311.
  • the cam 141 is designed such that the minimum width of the channel 2311 should be slightly less than the thickness of the free end 322 of the clip 32.
  • the cam 141 is coupled to the operating handle 140, or the cam 141 is integrally formed with the operating handle 140.
  • the relationship between the cam 141 and the operating handle 140 should be designed such that when the operating handle 140 is substantially parallel to the clip 32, the cam 141 is in contact with the clip; when the operating handle 140 is rotated by an angle less than 90 degrees, the cam 141 is out of contact with the clip. .
  • the spring clip is in the closed state, and there is no force on the operating handle 140.
  • the torsion spring 142 pushes the cam 141, and the width of the passage 2311 reaches the minimum position due to the frictional force between the cam outer edge 1411 (see FIG. 10) and the free end 322 main surface 3201 of the clip 32. 32 is locked and the spring clip remains in a stable closed state.
  • the present invention realizes the self-locking of the first body 10 and the second body 20 by the above simple structure.
  • the user only needs to press the operation handle 140 with one finger of the same hand, so the invention has the advantages of simple control and one-hand operation.
  • the grip portion When the grip portion reaches the predetermined opening degree, the pressing of the operating handle 140 is released. Since the force on the operating handle 140 disappears, the urging force of the torsion spring 142 acts to push the cam 141 to move toward the clip 32 again, and a frictional force is generated therebetween to lock the clip 32. At this time, the opening degree of the spring clip is maintained in a stable state, which is convenient for the operator to use.
  • the present invention realizes the clamping or disengaging of the clip 32 by the cam 141 by the operation handle 140 or the torsion spring 142 by the operation handle 140 or the torsion spring 142, thereby realizing the clamping of the clip 32 by the operation handle 140 or the torsion spring 142.
  • the degree of opening can be adjusted to the technical purpose of the stepless adjustment, improving the applicable performance of the spring clip.
  • the present invention sets the pair of friction pair members of the cam 141 and the clip 32 to be in contact with the surface of the clip 32 and to rub. Since the plane is relatively wide, the contact portion can be set to a long line contact, and the amount of wear between the cam 141 and the clip 32 is small. Therefore, the material of the friction pair component is required to be low, and it can be used reliably for a long time, and the cost is low. Moreover, in the present invention, the surface of the clip 32 is used as a friction surface in contact with the cam 141, and the outer contour shape of the clip 32 is not required to be high. It may be a circular arc shape, or may be a rectangular shape or other long strip shape, and the clip is clipped. The dimensional tolerances in the width direction of 32 are not high, which reduces the processing cost.
  • the pivotal connection of the first body and the second body may also be located at the ends of the first body and the second body.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)

Description

弹簧夹
技术领域
本发明涉及机械工具技术领域，尤其涉及一种可无级调整的弹簧夹。
背景技术
弹簧夹在使用的过程中，根据被夹物的大小，需要调整夹口的开度。在作业时，又需要开度固定为佳。为便于固定调整好的开度，现有技术中已经有大量具有锁紧机构的弹簧夹。
美国专利US6708587B1公开了一种弹簧夹，操控部件设置在钳柄的一外侧，可用拇指操作，简化了手的劳动，但是采用在钳柄上设置齿条付的技术方案，实现的是有级调节。
美国专利US6860179B2和US7406897B2公开的弹簧夹，将操控部件设置在钳柄的内侧，可用食指或无名指操作，操控性较好。其锁紧机构包括一个长条形的夹条和一个可回转的锁紧杆。夹条一端枢转地安装在握把上，另一端伸向握把。为了适应握把的移动，夹条是弧形的长条形板状件，并被设置成平行于枢轴，即夹条的圆弧圆心位置在枢轴处。
锁紧杆可以枢转，靠近枢转轴一端开有一个狭长开口。夹条可以滑动地穿过开口。锁紧杆的另一端被一个弹簧顶住。弹簧压力导致开口相对夹条偏置，圆弧形的夹条边缘与开口两端或两端之一的边缘发生摩擦，实现锁紧。当克服弹簧压力，按下锁紧杆，夹条边缘与开口两端边缘脱离接触，实现释放。
夹条边缘与开口两端边缘的摩擦面基本与枢轴平行。因为夹条较薄，其边缘与开口两端边缘的接触部位常常只能是点接触或很短的线接触，很容易过度磨损，使用中，其锁紧功能可靠性会逐渐降低，甚至磨损到一定程度时，锁紧机能彻底失效，使整个弹簧夹报废。即使按照US6860179B2公开的改进的技术方案，夹条边缘和开口两端采用了圆角结构，过度磨损仍然不能完全避免。因此，这类弹簧夹对夹片、锁紧杆开口处的材料要求较高，造成成本提高。夹条必须制造成圆弧形，其外形及尺寸精度加工要求较高；开口长度方向也有较高的尺寸精度加工要求，这都直接造成了成本提高。
美国专利US7107881B1公开了一种弹簧夹，在其一个主体中沿竖直方向设置了杆状物，通过一个L型元件锁紧或释放该杆状物，以固定开度。由于L型元件的一部分突出在主体之外，调整时需要另一个手的帮助，降低了手的自由程度，使用时的便利性较差。并且其杆状物与L型元件的摩擦面基本与枢轴平行，同样存在前述过度磨损和长期使用锁紧功能可靠性降低的问题，对材料要求较高，造成成本提高。
因此，本领域的技术人员致力于开发一种调整方便，便利性好，能长期可靠使用，成本较低的可无级调整的弹簧夹。
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调整方便，便利性好，能长期可靠使用，成本较低的可无级调整的弹簧夹。
为实现上述目的，本发明提供了一种弹簧夹，包括第一主体，其包含握持部分和夹持部分；第二主体，其包含握持部分和夹持部分；将第一主体和第二主体可枢转地联接在一起的第一枢轴元件；和一个锁紧机构，由至少一对摩擦副部件组成；所述摩擦副部件对中，第一摩擦副部件设置在第一主体上，包括第一摩擦副元件；第二摩擦副部件设置在第二主体上，包括第二摩擦副元件；所述成对设置的摩擦副部件中的第一、第二摩擦副元件相互摩擦，起到锁定作用；其中所述摩擦副元件主要在垂直于所述第一枢轴元件轴线的平面内发生摩擦。
本发明的弹簧夹将摩擦副元件对设置成在垂直于第一枢轴元件轴线的平面内接触并发生摩擦。由于该平面较为宽大，可以将接触部位设置成较长的线接触甚至是面接触，摩擦副元件对间的磨损量很小。因此，对摩擦副元件的材料要求较低，能长期可靠使用，成本较低。
在本发明的较佳实施方式中，所述锁紧机构还包括一个解锁机构，用于控制所述第一、第二摩擦副元件之间脱离接触，解除所述第一、第二摩擦副元件之间的锁定。该解锁机构还可以包括一个操作手柄，通过用手指按压所述操作手柄，使所述解锁机构起到解除所述第一、第二摩擦副元件之间锁定的作用。
在本发明的另一较佳实施方式中，所述第一摩擦副部件固定地设置在第一主体上。
在本发明的另一较佳实施方式中，所述第二摩擦副部件固定地设置在第二主体上。
在本发明的另一较佳实施方式中，所述第一摩擦副元件为一个长条形片状物，具有至少一个位于与第一枢轴元件轴线大致垂直的平面内的主表面，作为与第二摩擦副元件接触的摩擦面。
本发明的弹簧夹将片状的第一摩擦副元件表面作为与第二摩擦副元件接触的摩擦面，对该片状元件的轮廓形状要求不高，其可以为圆弧形，也可以为矩形或其他长条形状，对该片状元件宽度方向上的尺寸公差要求也不高，降低了加工成本。
在本发明的另一较佳实施方式中，所述第二摩擦副元件为一个滚针、楔形块或偏心凸轮与片状的第一摩擦副元件构成一个摩擦副元件对。或，多个滚针、楔形块或偏心凸轮与片状的第一摩擦副元件组成多对摩擦副元件对，共同起到锁定作用。
其中，在本发明的一个较佳实施方式中，所述第二摩擦副元件为至少一个滚针；
进一步地，所述第二摩擦副部件包括：一个所述第一摩擦副元件能够穿入的夹块，所述夹块的相对两侧设置有条形孔，所述条形孔中设置有至少一端外露于所述条形孔的滚针；所述第一摩擦副元件穿入夹块后，所述条形孔与所述第一摩擦副元件之间构成一夹角以使所述条形孔中的所述滚针与所述第一摩擦副元件具有接触或脱离两种状态；和一个滚针固定圈，通过弹性元件设置在所述夹块的外侧以限制所述滚针的轴向自由度，并可在所述弹性元件的作用下推动所述滚针在所述条形孔中向接触所述第一摩擦副元件的方向移动；所述操控手柄的工作部在旋动中可推动所述滚针在所述条形孔中向脱离所述第一摩擦副元件的方向移动。
其中，在本发明的另一个较佳实施方式中，所述第二摩擦副元件为至少一个楔形块；
进一步地，所述第二摩擦副部件包括：一个所述第一摩擦副元件能够穿入的夹块，所述夹块的相对两侧设置有楔形块导槽，所述楔形块导槽中设置有至少一端外露于所述楔形块导槽的楔形块；所述第一摩擦副元件穿入夹块后，所述楔形块导槽与所述第一摩擦副元件之间构成一夹角以使所述楔形块导槽中的所述楔形块与所述第一摩擦副元件具有接触或脱离两种状态；和一个楔形块固定圈，通过弹性元件设置在所述夹块的外侧以限制所述楔形块的轴向自由度，并可在所述弹性元件的作用下推动所述楔形块在所述楔形块导槽中向接触所述第一摩擦副元件的方向移动；所述操控手柄的工作部在旋动中可推动所述楔形块在所述楔形块导槽中向脱离所述第一摩擦副元件的方向移动。
其中，在本发明的另一个较佳实施方式中，所述第二摩擦副元件为至少一个偏心凸轮；
进一步地，所述第二摩擦副部件包括：一个所述第一摩擦副元件能够穿入的夹块；和一个凸轮，通过一个扭簧枢设在所述夹块上；所述第一摩擦副元件穿入夹块后，所述凸轮的转动使所述凸轮与所述第一摩擦副元件具有接触或脱离两种状态；并且所述操作手柄与凸轮一体成型，所述操控手柄的旋动可推动所述凸轮脱离所述第一摩擦副元件。
在本发明的另一较佳实施方式中，所述第一主体与所述第二主体的枢接处位于所述第一主体与所述第二主体的中部，使所述第一主体和第二主体的握持部分和夹持部分分别位于第一主体与第二主体的枢接处的两侧。或，所述第一主体与所述第二主体的枢接处位于所述第一主体与所述第二主体的端部，使所述第一主体和第二主体的握持部分和夹持部分位于第一主体与第二主体的枢接处的同一侧。
在本发明的另一较佳实施方式中，所述第一主体和/或所述第二主体中具有半开放的空腔，且，所述摩擦副部件设置在所述空腔中。所述操作手柄可以设置在所述空腔中，在夹紧状态时所述操作手柄的至少一部分位于所述空腔之外。
由于将操作手柄设置在主体的内侧，并主要是在主体的空腔中，使用者对操作手柄的操作就很方便，大大改善了弹簧夹的便利性。
在本发明的另一较佳实施方式中，所述第一摩擦元部件可以为圆弧形；进一步地，其厚度大致均匀。
在本发明的另一较佳实施方式中，所述操作手柄与第二摩擦副元件一体成型。
在本发明的另一较佳实施方式中，所述第一主体和/或所述第二主体的夹持部分设置有活动夹头。
在本发明的另一较佳实施方式中，所述第一主体与所述第二主体的部分或全部包覆有软性包覆层。
在本发明的另一较佳实施方式中，将所述第一主体与所述第二主体联接在一起的所述第一枢轴元件带有一个扭簧，以在所述第一主体与所述第二主体间施加一个张力。
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是本发明实施例1的第一工作状态结构（自锁状态）示意图；
图2是图1所示实施例的第二工作状态（待夹持状态）结构示意图。
图3是图1所示实施例的锁紧机构沿A-A剖面结构示意图；
图4是本发明实施例2的锁紧机构沿A-A剖面结构示意图；
图5是本发明实施例3的锁紧机构沿A-A剖面结构示意图；
图6是本发明实施例4的锁紧机构沿A-A剖面结构示意图；
图7是本发明实施例5的结构示意图；
图8是图7所示实施例的锁紧机构及解锁机构结构示意图；
图9是图7所示实施例的第二摩擦副部件沿C-C剖面结构示意图；
图10是图7所示实施例的锁紧机构沿C-C剖面工作状态结构示意图；
图11是图7所示实施例的锁紧机构及解锁机构沿B-B剖面结构示意图；
图12是图2所示实施例第二工作状态下的滚针受力分析图；
图13是图1所示实施例第一工作状态下的滚针受力分析图。
具体实施方式
【实施例1】
如图1和2所示，本发明的弹簧夹的一个具体实施例，包括一个第一主体10，一个第二主体20，和将第一主体10和第二主体20可枢转地联接在一起的第一枢轴6。第一主体10、第二主体20分别包含握持部分102、202和夹持部分101、201。两个主体10、20的夹持部分还可以分别设置有活动夹头，以便于夹持。
第一枢轴6用螺钉、螺栓、铆钉等制作，位于第一主体10与第二主体20的中部，第一主体10与第二主体20的下半部可以分别形成有半开放的空腔，并可以在外部包覆有软性包覆层，例如皮革、人造革、塑料或橡胶等。
本发明的弹簧夹还包括一个锁紧机构。该锁紧机构包括一对摩擦副部件，其中第一摩擦副部件设置在第一主体10上，即图中的夹片32；第二摩擦副部件31设置在第二主体20上，由夹块301、滚针51、滚针固定圈52和弹性元件53组成。
夹片32是一个长条形片状物，具有两个相背的主表面，其中至少一个主表面位于与第一枢轴6轴线大致垂直的平面内。夹片32的厚度大致均匀。
夹块301中间开设有一通道311。夹片32的一端321固定设置在第一主体10上，另一自由端322与夹块301相对，可以穿入通道311。自由端322为第一摩擦副元件。
如图4所示，夹块301固定设置在第二主体20（未示出）上。夹块301的两侧设置有条形孔50，条形孔50与夹片自由端322之间构成一夹角。条形孔50中设置有两端外露于条形孔50的滚针51。该滚针51构成第二摩擦副元件。夹块301外侧设置一个弹性元件53，通过一个滚针固定圈52推动滚针51沿条形孔50向着靠近夹片自由端322的方向移动。滚针固定圈52同时起到限制滚针51的轴向自由度的作用。
由于上述夹角的存在，条形孔50中的滚针51与夹片自由端322之间就具有可调节的间距。当弹簧夹的两个握持部分102、202相向运动（压下），夹片自由端322在通道311内自由滑动，推动滚针51，克服弹性元件53的压力，滚针51向着离开夹片自由端322的方向移动，弹簧夹的握持部分可以在压下方向自由单向移动，使弹簧夹的夹持部分到达夹住被夹物品的位置。图12示出了其工作原理。弹性元件53的弹力F在条形孔与滚针51的接触面上可以分解为切向的Fx和法向的Fy。Fx会使滚针产生逆时针的运动趋势。压下弹簧夹的两个握持部分相当于把夹片自由端322向通道311里推（图中自左向右方向）。滚针51受到夹片自由端322的摩擦力，也会产生逆时针转动的运动趋势，也就是说，夹片自由端322可以随着滚针51的逆时针转动而自由地自左向右单向移动。
本领域一般技术人员可以理解，上述夹角应大于斜面的自锁角，以免发生自锁。该自锁角的大小与夹片和滚针间的摩擦系数相关。
当弹簧夹的夹持部分101、201停止运动时，弹性元件53通过滚针固定圈52向滚针51施加的弹力使滚针51压在夹片自由端322上，夹片自由端322无法退出，实现锁定。
锁紧机构还可以包括一个解锁机构。解锁机构包括一个操作手柄40，操作手柄40通过扭簧42设置在第二主体20上，操作手柄40是可旋动的，用于控制夹块301与夹片32之间的脱离。操作手柄40的工作部41在操作手柄40的旋动中，提供一推动滚针51在条形孔50中向远离夹片自由端322方向移动的动力，作为上述弹性元件53的反作用力。如图4中箭头方向，在滚针固定圈52上施加一个能够克服弹性元件53弹力的推力（图中未示出操作手柄）, 滚针51回到松弛状态，夹片32被释放而解除锁定，其自由端322可以在通道311内自由滑动。
以下结合图1、图2和图13，通过本发明的弹簧夹的使用方法，说明其工作原理。
图1所示，弹簧夹在闭合状态，操作手柄40上无作用力。弹性元件53推动滚针固定圈52，将滚针51推动到条形孔50靠近夹片32处，由于滚针51与夹片32之间的摩擦力作用，夹片32被锁定，弹簧夹保持稳定的闭合状态。
当欲拉动第一主体10打开夹持部分时，如果不按压操作手柄40，由于滚针51与夹片32之间为一锐角摩擦角，拉动夹片32的力会带动滚针51，使两者挤压得更紧。如图13所示，弹性元件53的弹力F在条形孔与滚针51的接触面上可以分解为切向的Fx和法向的Fy。Fx会使滚针产生逆时针的运动趋势。欲拉动第一主体10打开夹持部分相当于要把夹片自由端322从通道311里向外拉（图中自右相左方向），滚针51受到夹片自由端322的摩擦力，会产生顺时针转动的运动趋势。两个力相互作用使得滚针51只会向靠近夹片自由端322的方向运动，这样一来就会出现弹簧夹受力越大，其提供给夹片自由端322的压力也越大，达到将夹片自由端322夹紧的目的。如此，滚针51与夹片32之间被锁定得更牢固。因此，本发明借由上述简单结构，实现了第一主体10与第二主体20的自锁。
当欲拉动第一主体10打开夹持部分时，并同时按压操作手柄40，由于操作手柄40上工作部41的作用，推动滚针51克服弹性元件53的推力，在条形孔50中向远离夹片32的方向移动。如此，滚针51与夹片32脱离接触，摩擦力消失，夹片32被释放，使第一主体10能被拉动，夹持部分101、201在扭簧42的作用下被打开。
上述操作中，只需要使用者用同一手的一手指按压操作手柄40即可实现，因此本发明具有操控简便，可单手操作的优势。
当夹持部分达到预定开度时，解除对操作手柄40的按压。由于操作手柄40上的作用力消失，弹性元件53的作用力发挥作用，再次推压滚针51向夹片32移动，并在两者之间产生摩擦力，使夹片32被锁定。
此时，如图2所示，弹簧夹的开度被保持在一稳定的状态，为操作者使用提供了便利。
当需要再次调整夹持部分开度时，只需要使用者用同一手的一手指按压操作手柄40，即可实现。
本发明由于设置条形孔50和滚针51结构，利用操作手柄40或滚针固定圈52，通过推动滚针51在两个相反方向上的移动，实现了滚针51对夹片32的夹紧或脱离，实现了弹簧夹的开度可以无级调整的技术目的，改善了弹簧夹的适用性能。
本发明将滚针51与夹片32组成的摩擦副元件对设置成在夹片32表面接触并发生摩擦。由于该平面较为宽大，可以将接触部位设置成较长的线接触，滚针51与夹片32间的磨损量很小。因此，对摩擦副元件的材料要求较低，能长期可靠使用，成本较低。并且，本发明将夹片32表面作为与滚针51接触的摩擦面，对夹片32的轮廓形状要求不高，其可以为圆弧形，也可以为矩形或其他长条形状，对夹片32宽度方向上的尺寸公差要求也不高，降低了加工成本。
进一步地，第一主体10、第二主体20的下半部中还具有半开放的空腔。且，夹片32的一端设置在第一主体10的空腔中，夹块301设置在第二主体20的空腔中。操作手柄40设置在第二主体20空腔中，在夹紧状态时操作手柄40的至少一部分位于该空腔之外，以便于按压。
【实施例2】
本发明的弹簧夹的另一个具体实施例的结构与实施例1类似，区别在于其锁紧机构。如图4所示，锁紧机构的夹块301中设置了两套条形孔50和50’。 条形孔中设置有两端外露于条形孔的两个滚针51和51’。滚针51与夹片自由端322组成一套摩擦副元件对，滚针51’ 与夹片自由端322组成另一套摩擦副元件对。两套摩擦副元件对共同作用，实现本发明的弹簧夹的无级锁紧功能。
本实施例的工作原理与第一实施例相同，所以不重述。
【实施例3】
本发明的弹簧夹的另一个具体实施例的结构与实施例1类似，区别在于，将锁紧机构的第二摩擦副部件更换为新的第二摩擦副部件131，由如图5所示的夹块1301、楔形块151、楔形块固定圈152和弹性元件153组成。夹块1301两侧设置有楔形块导槽150，楔形块导槽150中设置有两端外露于楔形块导槽150的楔形块151。该楔形块151构成第二摩擦副元件。夹块1301外侧设置一个弹性元件153，通过一个楔形块固定圈152推动楔形块151沿楔形块导槽150向着靠近夹片自由端322的方向移动。楔形块固定圈152同时起到防止楔形块151从楔形块导槽150掉落的作用。
本实施例的接触部位设置成面接触，摩擦副元件对间的磨损量更小，对摩擦副元件的材料要求更低，能长期可靠使用，成本更低。
本实施例的工作原理与第一实施例相同，所以不重述。
【实施例4】
本发明的弹簧夹的另一个具体实施例的结构与实施例3类似，区别在于，如图6所示，锁紧机构的夹块1301中设置了两套楔形块导槽150和150’。 楔形块导槽中设置有两端外露于楔形块导槽的两个楔形块151和151’。 楔形块151与夹片自由端322组成一套摩擦副元件对，楔形块151’与夹片自由端322组成另一套摩擦副元件对。两套摩擦副元件对共同作用，实现本发明的弹簧夹的无级锁紧功能。
本实施例的工作原理与第3实施例相同，所以不重述。
【实施例5】
本发明的弹簧夹的另一个具体实施例的结构与实施例1类似，也包括一个第一主体10，一个第二主体20，将第一主体10和第二主体20可枢转地联接在一起的第一枢轴6，和一个锁紧机构。第一主体10、第二主体20分别包含握持部分102、202和夹持部分101、201。区别在于，锁紧机构中的解锁机构与第二摩擦副部件安装在一起，特别是，操作手柄可以与第二摩擦副元件一体成型。
具体来说，如图7所示，该锁紧机构包括一对摩擦副部件，其中第一摩擦副部件设置在第一主体10上，即图中的夹片32；第二摩擦副部件231设置在第二主体20上，由夹块2301、凸轮141、扭簧142和轴143组成。
如图8所示，夹块2301是一个半开口的“［”字槽型结构，固定设置在第二主体20上。夹块2301的两侧开孔250，设置轴143。凸轮141通过套在轴143上的扭簧142设置在轴143上。该凸轮141构成第二摩擦副元件。凸轮141工作面为一个圆柱面的至少一部分，该圆柱面的轴线与凸轮141的回转轴143偏离。为了清楚地说明本发明，将凸轮141工作面上最靠近夹块2301槽型凹陷底面的母线定义为凸轮外缘1411。
夹块2301的槽型凹陷与凸轮141形成一通道2311。通道2311的四壁为：相对设立的槽型凹陷的两侧壁2301和2303，相对设立的槽型凹陷底面2302和凸轮外缘1411。
夹片32是一个长条形片状物，具有两个相背的主表面3201和3202，其中至少一个主表面位于与第一枢轴6轴线大致垂直的平面内。夹片32的厚度均匀。夹片32的一端321固定设置在第一主体10上，另一自由端322与夹块2301相对，可以穿入通道2311，并且穿入时夹片32的一个主表面与通道2311的槽型凹陷底面2302基本平行。自由端322为第一摩擦副元件。
如图9所示，通道2311的高度由两侧壁2301和2303限定。该高度的设定与夹片32的自由端322的垂直于主表面的外轮廓相关。当该外轮廓是一个以第一枢轴6为圆心的圆弧时，该高度为最小值。实际上，自由端322外轮廓形状可以是其他形状，例如矩形，该高度可以相应地适当增大，使之与自由端322外轮廓形状相适应。
通道2311的宽度由槽型凹陷底面2302和凸轮外缘1411限定。图9中，凸轮141在轴143上旋转时，其凸轮外缘1411位置随凸轮141旋转而左右移动，使通道2311的宽度发生相应变化，凸轮141与所述夹片32具有接触或脱离两种状态，从而夹紧或放松穿入通道2311的夹片32的自由端322。可见，凸轮141的设计应使通道2311的宽度最小值应略小于夹片32的自由端322的厚度。
如图7所示，凸轮141与操作手柄140相连接，或，凸轮141与操作手柄140一体成型。参见图11，凸轮141与操作手柄140的相互关系应该设计成：操作手柄140基本平行于夹片32时，凸轮141处于与夹片接触位置；操作手柄140转动一个小于90度的角度时，凸轮141与夹片脱离接触。。
以下结合图10、图11，通过本发明的弹簧夹的使用方法，说明其工作原理。
如图11所示，弹簧夹在闭合状态，操作手柄140上无作用力。扭簧142（参图10）推动凸轮141，由于凸轮外缘1411（参图10）与夹片32的自由端322主表面3201之间的摩擦力作用，通道2311的宽度到达最小位置，夹片32被锁定，弹簧夹保持稳定的闭合状态。
当欲拉动第一主体10打开夹持部分时，如果不按压操作手柄140，由于凸轮141与主表面3201之间为一锐角摩擦角，拉动夹片32的力会带动凸轮141，使两者挤压得更紧。如此，凸轮141与夹片32之间被锁定得更牢固。因此，本发明借由上述简单结构，实现了第一主体10与第二主体20的自锁。
当欲拉动第一主体10打开夹持部分时，并同时如图中箭头方向按压操作手柄40，推动操作手柄140上凸轮141克服扭簧142的推力，凸轮外缘1411相着远离夹片32的方向移动。如此，凸轮141与夹片32脱离接触，摩擦力消失，夹片32被释放，使第一主体10能被拉动，夹持部分被打开。
上述操作中，只需要使用者用同一手的一手指按压操作手柄140即可实现，因此本发明具有操控简便，可单手操作的优势。
当夹持部分达到预定开度时，解除对操作手柄140的按压。由于操作手柄140上的作用力消失，扭簧142的作用力发挥作用，再次推动凸轮141向夹片32移动，并在两者之间产生摩擦力，使夹片32被锁定。此时，弹簧夹的开度被保持在一稳定的状态，为操作者使用提供了便利。
当需要再次调整夹持部分开度时，只需要使用者用同一手的一手指按压操作手柄140，即可实现。
本发明由于设置凸轮141与操作手柄140相连接的结构，利用操作手柄140或扭簧142，通过推动凸轮141的转动，实现了凸轮141对夹片32的夹紧或脱离，实现了弹簧夹的开度可以无级调整的技术目的，改善了弹簧夹的适用性能。
本发明将凸轮141与夹片32组成的摩擦副元件对设置成在夹片32表面接触并发生摩擦。由于该平面较为宽大，可以将接触部位设置成较长的线接触，凸轮141与夹片32间的磨损量很小。因此，对摩擦副元件的材料要求较低，能长期可靠使用，成本较低。并且，本发明将夹片32表面作为与凸轮141接触的摩擦面，对夹片32的外轮廓形状要求不高，其可以为圆弧形，也可以为矩形或其他长条形状，对夹片32宽度方向上的尺寸公差要求也不高，降低了加工成本。
在本发明的其他实施例中，第一主体与第二主体的枢接处也可以位于第一主体与第二主体的端部。
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，皆应在由权利要求书所确定的保护范围内。

Claims (22)

  1. 一种弹簧夹，包括：
    第一主体，其包含握持部分和夹持部分；
    第二主体，其包含握持部分和夹持部分；
    将第一主体和第二主体可枢转地联接在一起的第一枢轴元件；和
    一个锁紧机构，由至少一对摩擦副部件组成；所述摩擦副部件对中，
    第一摩擦副部件设置在第一主体上，包括第一摩擦副元件；
    第二摩擦副部件设置在第二主体上，包括第二摩擦副元件；
    所述成对设置的摩擦副部件中的第一、第二摩擦副元件构成一个摩擦副元件对，通过相互摩擦起到锁定作用；
    其特征在于：所述摩擦副元件对主要在垂直于所述第一枢轴元件轴线的平面内发生摩擦。
  2. 如权利要求1所述的弹簧夹，其特征在于：所述锁紧机构还包括一个解锁机构，用于解除所述第一、第二摩擦副元件之间的锁定。
  3. 如权利要求2所述的弹簧夹，其特征在于：所述解锁机构包括一个操作手柄，通过用手指按压所述操作手柄，使所述解锁机构起到解除所述第一、第二摩擦副元件之间锁定的作用。
  4. 如权利要求1至3中任一权利要求所述的弹簧夹，其特征在于：所述第一摩擦副部件固定地设置在第一主体上。
  5. 如权利要求3所述的弹簧夹，其特征在于：所述第二摩擦副部件固定地设置在第二主体上。
  6. 如权利要求5所述的弹簧夹，其特征在于：所述第一摩擦副元件为一个长条形片状物，具有至少一个位于与第一枢轴元件轴线大致垂直的平面内的主表面，作为与第二摩擦副元件接触的摩擦面。
  7. 如权利要求6所述的弹簧夹，其特征在于：所述第二摩擦副元件为至少一个滚针。
  8. 如权利要求7所述的弹簧夹，其特征在于：
    所述第二摩擦副部件包括：
    一个所述第一摩擦副元件能够穿入的夹块，所述夹块的相对两侧设置有条形孔，所述条形孔中设置有至少一端外露于所述条形孔的滚针；所述第一摩擦副元件穿入夹块后，所述条形孔与所述第一摩擦副元件之间构成一夹角以使所述条形孔中的所述滚针与所述第一摩擦副元件具有接触或脱离两种状态；和
    一个滚针固定圈，通过弹性元件设置在所述夹块的外侧以限制所述滚针的轴向自由度，并可在所述弹性元件的作用下推动所述滚针在所述条形孔中向接触所述第一摩擦副元件的方向移动；
    所述操控手柄的工作部在旋动中可推动所述滚针在所述条形孔中向脱离所述第一摩擦副元件的方向移动。
  9. 如权利要求6所述的弹簧夹，其特征在于：所述第二摩擦副元件为至少一个楔形块。
  10. 如权利要求9所述的弹簧夹，其特征在于：
    所述第二摩擦副部件包括：
    一个所述第一摩擦副元件能够穿入的夹块，所述夹块的相对两侧设置有楔形块导槽，所述楔形块导槽中设置有至少一端外露于所述楔形块导槽的楔形块；所述第一摩擦副元件穿入夹块后，所述楔形块导槽与所述第一摩擦副元件之间构成一夹角以使所述楔形块导槽中的所述楔形块与所述第一摩擦副元件具有接触或脱离两种状态；和
    一个楔形块固定圈，通过弹性元件设置在所述夹块的外侧以限制所述楔形块的轴向自由度，并可在所述弹性元件的作用下推动所述楔形块在所述楔形块导槽中向接触所述第一摩擦副元件的方向移动；
    所述操控手柄的工作部在旋动中可推动所述楔形块在所述楔形块导槽中向脱离所述第一摩擦副元件的方向移动。
  11. 如权利要求6所述的弹簧夹，其特征在于：所述第二摩擦副元件为至少一个偏心凸轮。
  12. 如权利要求11所述的弹簧夹，其特征在于：
    所述第二摩擦副部件包括：
    一个所述第一摩擦副元件能够穿入的夹块；和
    一个凸轮，通过一个扭簧枢设在所述夹块上；所述第一摩擦副元件穿入夹块后，所述凸轮的转动使所述凸轮与所述第一摩擦副元件具有接触或脱离两种状态；
    并且所述操作手柄与凸轮一体成型，所述操控手柄的旋动可推动所述凸轮脱离所述第一摩擦副元件。
  13. 如权利要求1至3中任一权利要求所述的弹簧夹，其特征在于：所述第一主体和第二主体的握持部分和夹持部分分别位于第一主体与第二主体的枢接处的两侧。
  14. 如权利要求1至3中任一权利要求所述的弹簧夹，其特征在于：所述第一主体和第二主体的握持部分和夹持部分位于第一主体与第二主体的枢接处的同一侧。
  15. 如权利要求3所述的弹簧夹，其特征在于：所述第一主体和/或所述第二主体中具有半开放的空腔。
  16. 如权利要求15所述的弹簧夹，其特征在于：所述摩擦副部件的至少一部分设置在所述空腔中。
  17. 如权利要求16所述的弹簧夹，其特征在于：所述操作手柄设置在所述空腔中，在夹紧状态时所述操作手柄的至少一部分位于所述空腔之外。
  18. 如权利要求6所述的弹簧夹，其特征在于：所述第一摩擦元部件为圆弧形。
  19. 如权利要求6所述的弹簧夹，其特征在于：所述第一摩擦元部件的厚度大致均匀。
  20. 如权利要求1所述的弹簧夹，其特征在于：所述第一主体和/或所述第二主体的夹持部分设置有活动夹头。
  21. 如权利要求1所述的弹簧夹，其特征在于：所述第一主体与所述第二主体的部分或全部包覆有软性包覆层。
  22. 如权利要求1所述的弹簧夹，其特征在于：将所述第一主体与所述第二主体联接在一起的所述第一枢轴元件带有一个扭簧，以在所述第一主体与所述第二主体间施加一个张力。
PCT/CN2010/079841 2010-12-15 2010-12-15 弹簧夹 WO2012079234A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA2821988A CA2821988C (en) 2010-12-15 2010-12-15 Spring clamp
PCT/CN2010/079841 WO2012079234A1 (zh) 2010-12-15 2010-12-15 弹簧夹
US13/582,063 US9027913B2 (en) 2010-12-15 2010-12-15 Spring clamp
EP10860734.2A EP2653266B1 (en) 2010-12-15 2010-12-15 Spring clamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2010/079841 WO2012079234A1 (zh) 2010-12-15 2010-12-15 弹簧夹

Publications (1)

Publication Number Publication Date
WO2012079234A1 true WO2012079234A1 (zh) 2012-06-21

Family

ID=46243976

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2010/079841 WO2012079234A1 (zh) 2010-12-15 2010-12-15 弹簧夹

Country Status (4)

Country Link
US (1) US9027913B2 (zh)
EP (1) EP2653266B1 (zh)
CA (1) CA2821988C (zh)
WO (1) WO2012079234A1 (zh)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD774118S1 (en) 2013-08-29 2016-12-13 Johannes Demmeler Welding table
CN105983921B (zh) * 2015-01-30 2023-03-24 杭州巨星工具有限公司 棘轮夹
WO2017088651A1 (zh) * 2015-11-26 2017-06-01 李荣亮 一种夹具
US9821439B2 (en) 2016-02-03 2017-11-21 Wade A. Smith Hand clamp improvement and accessory
CN106271811A (zh) * 2016-08-29 2017-01-04 芜湖银星汽车零部件有限公司 一种提取用夹钳
US11458596B1 (en) * 2018-04-09 2022-10-04 David J. Kirk Mechanical seizing and locking clamp device
US10982804B1 (en) * 2019-03-06 2021-04-20 Stian Nilsen Pivot clamp system and method of use
CN109820561B (zh) * 2019-04-12 2020-10-13 河南科技大学第一附属医院 一种无级止血钳

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2654283Y (zh) * 2003-09-29 2004-11-10 上海朝华工具有限公司 可调压力棘轮夹
CN2706278Y (zh) * 2003-11-14 2005-06-29 钟伟华 一种大力钳
CN2801398Y (zh) * 2005-05-25 2006-08-02 贺岳群 一种自锁型大力钳
CN2803626Y (zh) * 2005-05-20 2006-08-09 刘逢忠 弹簧夹改良构造
US7107881B1 (en) * 2005-05-24 2006-09-19 Ferng-Jong Liou Spring clamp
US7406897B2 (en) * 2005-11-08 2008-08-05 Chin Lin Hsu Clamping device having stepless braking effect

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU3000277A (en) * 1976-10-26 1979-05-03 Miles L J Kitchen utensil
BE888258A (nl) * 1981-04-03 1981-07-31 Peever N V Tang voor het op een dier vasthechten van een identifikatiemerk.
US4893530A (en) * 1987-03-19 1990-01-16 Warheit William A Plier-type tool
CA2327300C (en) 1999-02-11 2001-09-11 Wolfcraft Gmbh Vise-grip or expanding pliers
US6860179B2 (en) * 1999-05-03 2005-03-01 Irwin Industrial Tool Company Clamp device
US6336386B1 (en) * 2000-07-21 2002-01-08 Yung Jen Lee Plier device having an adjustable opening
DE20121753U1 (de) * 2001-06-15 2003-04-17 Bema Gmbh & Co Kg Endochirurgi Griff für ein chirurgisches Instrument
US6564703B1 (en) * 2002-05-16 2003-05-20 Kun-Meng Lin Structure of clip
US6698734B1 (en) * 2003-01-27 2004-03-02 Ching-Shu Wang Clamp assembly
US7007936B2 (en) * 2003-10-08 2006-03-07 Ching-Tsung Chang Spring clamp
CA2458044A1 (en) * 2004-02-20 2005-08-20 Wolfcraft Gmbh Spring clamp with hook
IL162291A (en) * 2004-06-01 2008-04-13 David Klein Clamp with clamp force sensor
WO2009099665A1 (en) * 2008-02-07 2009-08-13 Nikhil Gupta Bead crimping tool
US8393254B2 (en) * 2008-03-04 2013-03-12 Bradshaw Medical, Inc. Gripping device
US7669505B2 (en) * 2008-05-27 2010-03-02 Black & Decker Inc. Pin lock pliers
TWM346254U (en) * 2008-07-03 2008-12-01 Taiwan Carol Electronics Co Ltd Jig for stably holding an article
US8286954B2 (en) * 2010-03-22 2012-10-16 Bo Ren Zheng Locking pliers with one or two slide bars each secured to a stationary jaw carrier
US8137379B2 (en) * 2010-05-03 2012-03-20 Josiah Labash Pressure-applying device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2654283Y (zh) * 2003-09-29 2004-11-10 上海朝华工具有限公司 可调压力棘轮夹
CN2706278Y (zh) * 2003-11-14 2005-06-29 钟伟华 一种大力钳
CN2803626Y (zh) * 2005-05-20 2006-08-09 刘逢忠 弹簧夹改良构造
US7107881B1 (en) * 2005-05-24 2006-09-19 Ferng-Jong Liou Spring clamp
CN2801398Y (zh) * 2005-05-25 2006-08-02 贺岳群 一种自锁型大力钳
US7406897B2 (en) * 2005-11-08 2008-08-05 Chin Lin Hsu Clamping device having stepless braking effect

Also Published As

Publication number Publication date
CA2821988A1 (en) 2012-06-21
US20130249154A1 (en) 2013-09-26
CA2821988C (en) 2018-01-09
EP2653266A4 (en) 2015-12-02
US9027913B2 (en) 2015-05-12
EP2653266B1 (en) 2017-07-26
EP2653266A1 (en) 2013-10-23

Similar Documents

Publication Publication Date Title
WO2012079234A1 (zh) 弹簧夹
WO2016176817A1 (zh) 扳手
US20100088905A1 (en) Chain saw equipped with a device for adjusting the tightness of the cutting chain
US20070283526A1 (en) Handle grip
US11383357B2 (en) Universal pliers
US20110005905A1 (en) Locking switch device for a power tool
US20140265084A1 (en) Clamping and spreading tool
KR102418863B1 (ko) 실용적 아트 나이프
JP2647623B2 (ja) 手回しねじクランプ
JP2002103196A (ja) 手持ち式電動サンダ
WO2015180012A1 (zh) 一种钳口平移的板钳
WO2017000314A1 (zh) 夹持结构及具有所述夹持结构的可移动平台
WO2017000311A1 (zh) 夹持结构及具有所述夹持结构的可移动平台
JP2005529756A (ja) 鋸刃案内システムを有する手持ち式行程鋸機械
WO2015184641A1 (zh) 扳手
US20170239880A1 (en) Automatic welding machine
US6305249B1 (en) Adjustable wrench
US11959320B2 (en) Latch mechanism for a guard assembly of a processing machine
WO2015192365A1 (zh) 大力钳
WO2015188373A1 (zh) 棘轮工具
TWI593520B (zh) 可調整之鎖鉗
US11285551B2 (en) Pipe cutting device capable of adjusting moving path of cutter
WO2016144029A1 (en) Headrest moving device
JPS59114238A (ja) 給紙装置における紙捌き機構
WO2021077359A1 (zh) 一种活动扳手

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10860734

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 13582063

Country of ref document: US

ENP Entry into the national phase

Ref document number: 2821988

Country of ref document: CA

NENP Non-entry into the national phase

Ref country code: DE

REEP Request for entry into the european phase

Ref document number: 2010860734

Country of ref document: EP