CN110170869A - It is a kind of to be not only accurately positioned but also finishing connecting rod shape fixture convenient for loading and unloading - Google Patents

It is a kind of to be not only accurately positioned but also finishing connecting rod shape fixture convenient for loading and unloading Download PDF

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Publication number
CN110170869A
CN110170869A CN201910552397.8A CN201910552397A CN110170869A CN 110170869 A CN110170869 A CN 110170869A CN 201910552397 A CN201910552397 A CN 201910552397A CN 110170869 A CN110170869 A CN 110170869A
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CN
China
Prior art keywords
positioning pin
connecting rod
pin
tapered sleeve
end positioning
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Granted
Application number
CN201910552397.8A
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Chinese (zh)
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CN110170869B (en
Inventor
章祥宝
高峰
李峥
王军
高山
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National No616 Plant
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National No616 Plant
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Priority to CN201910552397.8A priority Critical patent/CN110170869B/en
Publication of CN110170869A publication Critical patent/CN110170869A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06Work-clamping means
    • B23Q3/062Work-clamping means adapted for holding workpieces having a special form or being made from a special material

Abstract

It can be not only accurately positioned the invention discloses one kind but also finishing connecting rod shape fixture convenient for loading and unloading, and tighten the second bolt not only removable pin can be made to swell and be bonded with connecting rod macropore, but also big end surface reliable grip can be carried out;The elasticity of first spring should be much larger than second spring, and swivel nut and removable pin cooperation surface roughness will be got well, and fit clearance should be appropriate, to guarantee that removable pin is light, easy slide;Second screw is inserted into the second tapered sleeve keyway, prevents the rotation of the second tapered sleeve from generating larger relative motion and friction with the first spring, guarantees that the sliding of the second tapered sleeve is flexible;It frequently to be slided in removable pin work, increase swivel nut between big end positioning pin at it, and the hardness of swivel nut is less than removable pin, makes abrasion in work occur to be convenient for changing in swivel nut, reduces manufacturing cost.Generally, the accurate positioning of this fixture, clamping are reliable and stable, easy to loading and unloading, can meet connecting rod shape finishing demand, guarantee connecting rod weight demands.

Description

It is a kind of to be not only accurately positioned but also finishing connecting rod shape fixture convenient for loading and unloading
Technical field
The invention belongs to technical field of mechanical processing, it is related to a kind of can not only be accurately positioned but also finishing connecting rod convenient for loading and unloading Shape fixture.
Background technique
Connecting rod is a key part in engine core movement parts, especially in rev-happy engine, to connecting rod Major part, microcephaly's weight and total weight have strict demand, and also there are strict requirements for weight difference between each connecting rod in engine on the same stage. Connecting rod concentric reducer pore size precision is very high, the size difference in hole to weight very little, therefore influence connecting rod weight it is main because Element is the outer dimension of connecting rod.Position error is reduced, accurate positionin is the key link of connecting rod sharp processing.
The usually outer clamp of processing connecting rod uses plane and two pits positioning method, two positioning pins one be straight pin, one be Rhombus pin, for convenience of loading and unloading, positioning pin and connecting rod size head bore have the gap 0.05-0.1mm, are pressed in size head end with two pressing plates Face carries out connecting rod sharp processing.
Straight pin and this plane and two pits positioning method fixture schematic diagram of rhombus pin are as depicted in figs. 1 and 2.Pass through bolt 1, spiral shell Cap 3, key 14 secure fixtures to platen, and straight pin 4, rhombus pin 10 position connecting rod, pressing plate 7,11 and nut 8,12 Connecting rod is compressed.In order to load and unload connecting rod convenience, straight pin and rhombus pin, small, big end hole has certain interval with connecting rod, about exists 0.05-0.1mm range.The outer clamp existing defects of this connecting rod are as follows:
1, connecting rod quality centre-of gravity shift is caused in gap existing for positioning pin, rhombus pin and connecting rod size head bore, influences connecting rod Outer dimension consistency causes the large and small head weight consistency of each connecting rod poor.
2, positioning pin, rhombus pin and connecting rod concentric reducer interporal lacuna cannot be too big, cause connecting rod clamping inconvenient, need to be by connecting rod By level, and with positioning pin to just could being more smoothly packed into, it may appear that the not positive situation of dress easily causes positioning pin to wear, and increases pair Control the adverse effect of weight.
Summary of the invention
(1) goal of the invention
The purpose of the present invention is not only eliminated the position gap in pin and hole, but also protect by manufacturing and designing a kind of suitable fixture It is convenient to demonstrate,prove work-handling, avoids the heel and toe wear of positioning pin, positioning and clamping is stable, reliable, guarantees connecting rod sharp processing size Consistency, thus to guarantee that connecting rod concentric reducer weight and total weight require to lay the foundation.
(2) technical solution
It can be not only accurately positioned in order to solve the above technical problem, the present invention provides one kind but also finishing connecting rod convenient for loading and unloading Shape fixture comprising: bottom plate 1 is fixed on the small end positioning pin 4 of 1 one end of bottom plate and is fixed on the big end of 1 other end of bottom plate Positioning pin 8,4 bottom of small end positioning pin are fixed on bottom plate 1, and middle part is arranged as the step surface of wrist-pin end of connecting rod positioning plane, platform Male cone (strobilus masculinus) is set above terrace, and 4 top of small end positioning pin is cylindrical drum, and the first tapered sleeve 5, the first cone are arranged outside cylindrical drum upper end 5 outside of set is the conical surface, the male cone (strobilus masculinus) of small end positioning pin 4 and the 5 outside conical surface of the first tapered sleeve by cone match arrangement cone circle 7, even The small stomidium of bar is set in outside cone circle 7, screw thread is opened in 4 centre bore of small end positioning pin, the first bolt 6 is fitted into small end positioning pin 4 In heart hole, prominent 4 top end surface of small end positioning pin of 5 top end surface of the first tapered sleeve, the first bolt 6 is located at 5 top end of the first tapered sleeve Above face;The second tapered sleeve 15 is arranged in hole for 8 center opening of big end positioning pin, and 15 center of the second tapered sleeve is provided with stepped hole, stepped hole Upper hole aperture be greater than bottom hole aperture, upper hole aperture is greater than the top orifice diameter of 8 center opening of big end positioning pin, the Two bolts 13 pass through the stepped hole of 8 center opening of big end positioning pin and the second tapered sleeve 15, and the first spring 14 is arranged in upper hole, the Nut 11 is arranged in two tapered sleeves, 15 bottom, and the second bolt 13 passes through the first spring 14 and nut 11, and 15 external wall of upper portion of the second tapered sleeve is The conical surface, setting is there are two swivel nut 18 positioned opposite on corresponding 8 side wall of big end positioning pin in conical surface periphery, cloth in each swivel nut 18 A removable pin 16 is set, 16 one end of removable pin is the conical surface, is matched with the conical surface of 15 outer wall of the second tapered sleeve, 16 other end of removable pin For bulb end, second spring 17 is arranged in the middle part of removable pin 16, bulb end passes through swivel nut 18, and 17 block of second spring is in swivel nut 18 It is interior.
Wherein, the outer diameter at 5 top of the first tapered sleeve is greater than the outer diameter of bottom, is formed gradually intilted from top to bottom Circular conical surface;The male cone (strobilus masculinus) of small end positioning pin 4 is the circular conical surface being from top to bottom gradually inclined outwardly;The inner wall of cone circle 7 is the conical surface, Foreign currency face is cylindrical surface, and conical surface of inboard wall includes upper and lower two parts, and upper part is matched with the conical surface of the first tapered sleeve 5, lower part and cone The conical surface matching of circle 7.
Wherein, interleaved in the upper and bottom section of the cone circle 7 to be equipped with multiple openings.
Wherein, mounting hole, the bottom merging peace of small end positioning pin 4 and big end positioning pin 8 are opened in the both ends of the bottom plate 1 respectively It fills in hole, further respectively has installation edge on small end positioning pin 4 and big end positioning pin 8, installation edge is passed through by dormant bolt Small end positioning pin 4 and big end positioning pin 8 are fixed on bottom plate 1 respectively.
Wherein, bottom pin 19 is arranged in the big end positioning pin mounting hole bottom, and bottom pin 19 is positioned by sunk screw and big end The connection of 8 bottom of pin, 19 center of bottom pin open up threaded hole, and nut 11 is placed on bottom pin 19, between nut 11 and the second tapered sleeve 15 It is threadedly coupled after thering is gap, the second bolt 13 to pass through nut 11 with bottom pin 19.
Wherein, the second pressing plate 12, the second pressing plate 12 are additionally provided between 8 top of second bolt 13 and big end positioning pin It is arranged in above big end positioning pin and connecting rod tip.
Wherein, the first pressing plate 9 is provided on the installation edge of the big end positioning pin 8, the first pressing plate 9 passes through sunk screw It is mounted on big end positioning pin 8.
Wherein, several threaded holes have been disposed radially on the installation edge of the big end positioning pin 8, on the second tapered sleeve 15 It is provided with keyway corresponding with screw thread hole site, the second screw 10 is packed into threaded hole, the end of the second screw 10 is embedded in keyway It is interior, realize the axially position to the second tapered sleeve 15.
Wherein, the hardness of the swivel nut 18 is less than the hardness of removable pin 16, and the elasticity of the first spring 14 is much larger than the second bullet The elasticity of spring 17.
Wherein, the both ends of the bottom plate 1 pass through bolt 20 respectively and nut 21 is fixed on platen;The two of bottom plate 1 End bottom is respectively arranged with key 2, and key 2 is fixed on bottom plate 1 by the first screw 3, and key 2 is matched with the keyway on platen It closes, realizes the stationary positioned to bottom plate 1.
(3) beneficial effect
Fixture provided by above-mentioned technical proposal, it is ensured that wrist-pin hole, the positioning of big stomidium gapless, and position quasi- Really, reliably, it is easy to loading and unloading;It is verified by processing, this fixture can satisfy connecting rod finished profile and weight consistency requirement, add Work stable accuracy achieves good effect.
Detailed description of the invention
Fig. 1 is the diagram of plane and two pits positioning method clamp structure in the prior art.
Fig. 2 is the top view of Fig. 1.
In Fig. 1 and Fig. 2,1- bolt, 2- bottom plate, 3- nut, 4- straight pin, 5- stud, 6- nut, 7- pressing plate, 8- Nut, 9- bolt, 10- rhombus pin, 11- pressing plate, 12- nut, 13- key, 14- bolt.
Fig. 3 is that connecting rod sharp processing of the present invention is illustrated with clamp structure.
Fig. 4 is the top view of Fig. 3.
In Fig. 3 and Fig. 4,1- bottom plate, 2- key, the first screw of 3-, 4- small end positioning pin, the first tapered sleeve of 5-, the first bolt of 6-, 7- cone circle, 8- big end positioning pin, the first pressing plate of 9-, the second screw of 10-, 11- nut, the second pressing plate of 12-, the second bolt of 13-, The first spring of 14-, the second tapered sleeve of 15-, 16- removable pin, 17- second spring, 18- swivel nut, the bottom 19- pin, 20- third bolt, 21- Nut.
Specific embodiment
To keep the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to tool of the invention Body embodiment is described in further detail.
According to connecting rod concentric reducer pore size and structure, from avoiding pin and hole position gap, reduce positioning pin heel and toe wear Etc. consider chuck designs, final design microcephaly ringfeder and major part rise the clamp structure of pin.
Fixture schematic diagram is as shown in Figure 3 and Figure 4, and fixture includes: bottom plate 1,4 and of small end positioning pin for being fixed on 1 one end of bottom plate It is fixed on the big end positioning pin 8 of 1 other end of bottom plate, 4 bottom of small end positioning pin is fixed on bottom plate 1, and middle part is arranged as connecting rod Small end positions the step surface of plane, and male cone (strobilus masculinus) is arranged above step surface, and 4 top of small end positioning pin is cylindrical drum, cylindrical drum upper end Outside is arranged the first tapered sleeve 5, is the conical surface, the 5 outside conical surface of the male cone (strobilus masculinus) of small end positioning pin 4 and the first tapered sleeve outside the first tapered sleeve 5 It arranges that cone circle 7, wrist-pin hole are set in outside cone circle 7 by cone match, opens screw thread in 4 centre bore of small end positioning pin, the One bolt 6 is packed into 4 centre bore of small end positioning pin, prominent 4 top end surface of small end positioning pin of 5 top end surface of the first tapered sleeve, and first Bolt 6 is located above 5 top end surface of the first tapered sleeve;The second tapered sleeve 15, the second cone are arranged in hole for 8 center opening of big end positioning pin It covers 15 centers and is provided with stepped hole, the upper hole aperture of stepped hole is greater than bottom hole aperture, and upper hole aperture is greater than big end positioning pin 8 The top orifice diameter of center opening, the second bolt 13 pass through the stepped hole of 8 center opening of big end positioning pin and the second tapered sleeve 15, The first spring 14 is arranged in upper hole, nut 11 is arranged in 15 bottom of the second tapered sleeve, and the second bolt 13 passes through the first spring 14 and spiral shell Mother 11,15 external wall of upper portion of the second tapered sleeve are the conical surface, and there are two opposite cloth for setting on corresponding 8 side wall of big end positioning pin in conical surface periphery The swivel nut 18 set, each swivel nut 18 is interior to arrange a removable pin 16, and 16 one end of removable pin is the conical surface, with 15 outer wall of the second tapered sleeve The conical surface matches, and 16 other end of removable pin is bulb end, and second spring 17 is arranged in the middle part of removable pin 16, and bulb end passes through swivel nut 18,17 block of second spring is in swivel nut 18.
The outer diameter at 5 top of the first tapered sleeve is greater than the outer diameter of bottom, forms from top to bottom gradually intilted circular conical surface;It is small The male cone (strobilus masculinus) for holding positioning pin 4 is the circular conical surface being from top to bottom gradually inclined outwardly;The inner wall of cone circle 7 is the conical surface, and foreign currency face is Cylindrical surface, conical surface of inboard wall include upper and lower two parts, and upper part is matched with the conical surface of the first tapered sleeve 5, the conical surface of lower part and cone circle 7 Matching.In order to realize that cone circle 7, with the elastic force expanded outwardly, bores interleaved in the upper and bottom section of circle 7 set in stress There are multiple openings.After the cone match of the conical surface of small end positioning pin 4 and the first tapered sleeve 5 and cone circle 7, when free state, cone circle 7 with Wrist-pin hole diametric clearance about 0.5mm, facilitates connecting rod to load and unload;It when needing to position, tightens the first bolt 6 and moves downward, compress First tapered sleeve 5 moves downward, by the conical surface effect make cone circle 7 spreadings and with wrist-pin hole blind-mate, while the conical surface produce Raw downward component is bonded wrist-pin end of connecting rod bottom surface and the step surface of small end positioning pin 4, realizes the radial and axial of wrist-pin end of connecting rod Positioning;When releasing positioning, bolt 6 is unclamped, the 7 recovery deformation of cone circle is simultaneously separated with wrist-pin hole.
Mounting hole is opened at the both ends of bottom plate 1 respectively, small in the bottom merging mounting hole of small end positioning pin 4 and big end positioning pin 8 Installation edge is further respectively had on end positioning pin 4 and big end positioning pin 8, installation edge is passed through respectively by small end by dormant bolt Positioning pin 4 and big end positioning pin 8 are fixed on bottom plate 1.
Bottom pin 19 is arranged in big end positioning pin mounting hole bottom, and bottom pin 19 is connected by sunk screw and 8 bottom of big end positioning pin It connecing, pin 19 center in bottom opens up threaded hole, and nut 11 is placed on bottom pin 19, there is gap between nut 11 and the second tapered sleeve 15, the Two bolts 13 are threadedly coupled after passing through nut 11 with bottom pin 19.
Second bolt 13 and big end positioning pin are additionally provided with the second pressing plate 12 between 8 top, and the second pressing plate 12 is arranged in greatly It holds above positioning pin and connecting rod tip.
The first pressing plate 9 is provided on the installation edge of big end positioning pin 8, the first pressing plate 9 is mounted on greatly by sunk screw It holds on positioning pin 8, in order to can be convenient replacement after wearing.
Several threaded holes have been disposed radially on the installation edge of big end positioning pin 8, be provided on the second tapered sleeve 15 with The corresponding keyway in screw thread hole site, threaded hole is interior to be packed into the second screw 10, and the end of the second screw 10 is embedded in keyway, successively real It now to the axially position of the second tapered sleeve 15, prevents the rotation of the second tapered sleeve 15 from generating friction with the first spring 14, and guarantees the second cone Set 15 is identical always as 16 cooperation position of removable pin;The hardness of swivel nut 18 is less than the hardness of removable pin 16, sends out abrasion when sliding It is raw to be convenient for changing in swivel nut 18, reduce manufacturing cost;The elasticity of first spring 14 is much larger than the elasticity of second spring 17.
When free state, big end positioning pin 8 and connecting rod tip interporal lacuna about 1mm, to facilitate connecting rod to load and unload, the second tapered sleeve 15 With two removable pins 16 (180 ° opposed) cone match, removable pin 16 is slidably matched with swivel nut 18;When needing to position, second is tightened Bolt 13, the first spring 14 release elastic force move down the second tapered sleeve 15, by cone match make removable pin 16 swell and with even The big stomidium blind-mate of bar;Continue to tighten the second bolt 13, compresses the second pressing plate 12 by connecting rod tip;Unclamp the second bolt When 13, the second pressing plate 12 unclamps, and the second tapered sleeve 15 moves up, and removable pin 16 is withdrawn under the effect of second spring 17, with connecting rod tip It separates.
Fixture is in use, the both ends of bottom plate 1 pass through bolt 20 respectively and nut 21 is fixed on platen;Bottom plate 1 Both ends bottom is respectively arranged with key 2, and key 2 is fixed on bottom plate 1 by the first screw 3, and key 2 is matched with the keyway on platen It closes, realizes the stationary positioned to bottom plate 1.
The present embodiment fixture uses multiple part combination modes mainly for reduction manufacture difficulty and cost.
Steps are as follows for the present embodiment fixture operation:
1, when fixture releasing orientation, because crank bore, small stomidium and large and small end positioning pin gap are big, can easily by Connecting rod is put into fixture;
2, first with lesser the first bolt of power pre-screwing 6, be bonded cone circle 7 gently with wrist-pin hole, connecting rod bottom surface and Fixture positioning surface is gently bonded;
3, the second bolt 13 is tightened, removable pin 16 is swelled, with crank bore blind-mate;Continue to tighten the second spiral shell Bolt 13 compresses the second pressing plate 12 by connecting rod;
4, reinforcing repeats step 2, stablizes cone circle 7 with wrist-pin hole, connecting rod bottom surface and the cooperation of fixture positioning surface, jail Gu;
5, reinforcing repeats step 3, and it is reliable to guarantee that the second pressing plate 12 compresses connecting rod.
6, connecting rod sharp processing finishes, and unclamps the first bolt 6, the second bolt 13, extracts the second pressing plate 12 out, can be by connecting rod It removes.
As can be seen from the above technical solutions, in the present invention, tightening the second bolt 13 both can make removable pin swell and connect The fitting of bar macropore, and big end surface reliable grip can be carried out;The elasticity of first spring 14 should be much larger than second spring 17, swivel nut 18 cooperate surface roughness to get well with removable pin 16, and fit clearance should be appropriate, with guarantee removable pin 16 easily, easy slide;Second Screw 10 is inserted into 15 keyway of the second tapered sleeve, prevents the rotation of the second tapered sleeve 15 from generating larger relative motion and mill with the first spring 14 It wipes, guarantees that the second tapered sleeve 15 slides flexibly;It frequently to be slided in the work of removable pin 16, increase spiral shell between big end positioning pin at it Set 18, and the hardness of swivel nut 18 is less than removable pin 16, and abrasion is made in work to occur to be convenient for changing in swivel nut 18, reduce manufacture at This.Generally, the accurate positioning of this fixture, clamping are reliable and stable, easy to loading and unloading, can meet connecting rod shape finishing demand, guarantee Connecting rod weight demands.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations Also it should be regarded as protection scope of the present invention.

Claims (10)

1. one kind can not only be accurately positioned but also finishing connecting rod shape fixture convenient for loading and unloading characterized by comprising bottom plate (1), it is fixed on the small end positioning pin (4) of bottom plate (1) one end and is fixed on the big end positioning pin (8) of bottom plate (1) other end, small end Positioning pin (4) bottom is fixed on bottom plate (1), and middle part is arranged as the step surface of wrist-pin end of connecting rod positioning plane, step surface top Male cone (strobilus masculinus) is set, and small end positioning pin (4) top is cylindrical drum, is arranged the first tapered sleeve (5), the first tapered sleeve outside cylindrical drum upper end (5) external is the conical surface, and the external conical surface of the male cone (strobilus masculinus) and the first tapered sleeve (5) of small end positioning pin (4) arranges cone circle by cone match (7), wrist-pin hole is set in cone circle (7) outside, and screw thread is opened in small end positioning pin (4) centre bore, and the first bolt (6) is packed into small It holds in positioning pin (4) centre bore, prominent small end positioning pin (4) top end surface of the first tapered sleeve (5) top end surface, the first bolt (6) Above the first tapered sleeve (5) top end surface;The second tapered sleeve (15) are arranged in hole in big end positioning pin (8) center opening, the second cone Set (15) center is provided with stepped hole, and the upper hole aperture of stepped hole is greater than bottom hole aperture, and upper hole aperture is positioned greater than big end The top orifice diameter of (8) center opening is sold, the second bolt (13) passes through big end positioning pin (8) center opening and the second tapered sleeve (15) stepped hole, upper hole is interior to arrange the first spring (14), and nut (11) are arranged in the second tapered sleeve (15) bottom, the second bolt (13) the first spring (14) and nut (11) are passed through, the second tapered sleeve (15) external wall of upper portion is the conical surface, the corresponding big end in conical surface periphery There are two swivel nut (18) positioned opposite, each swivel nut (18) is interior to arrange a removable pin (16) for setting on positioning pin (8) side wall, Removable pin (16) one end is the conical surface, is matched with the conical surface of the second tapered sleeve (15) outer wall, and removable pin (16) other end is bulb end, It is arranged second spring (17) in the middle part of removable pin (16), bulb end passes through swivel nut (18), and second spring (17) block is in swivel nut (18) It is interior.
2. can not only be accurately positioned as described in claim 1 but also finishing connecting rod shape fixture convenient for loading and unloading, feature exist In the outer diameter at the top of first tapered sleeve (5) is greater than the outer diameter of bottom, forms from top to bottom gradually intilted circular conical surface; The male cone (strobilus masculinus) of small end positioning pin (4) is the circular conical surface being from top to bottom gradually inclined outwardly;The inner wall of cone circle (7) is the conical surface, outside Coin face is cylindrical surface, and conical surface of inboard wall includes upper and lower two parts, and upper part is matched with the conical surface of the first tapered sleeve (5), lower part and cone Enclose the conical surface matching of (7).
3. can not only be accurately positioned as claimed in claim 2 but also finishing connecting rod shape fixture convenient for loading and unloading, feature exist In interleaved in the upper and bottom section of the cone circle (7) to be equipped with multiple openings.
4. can not only be accurately positioned as claimed in claim 3 but also finishing connecting rod shape fixture convenient for loading and unloading, feature exist In mounting hole, the bottom merging mounting hole of small end positioning pin (4) and big end positioning pin (8) are opened in the both ends of the bottom plate (1) respectively It is interior, installation edge is further respectively had on small end positioning pin (4) and big end positioning pin (8), installation edge is passed through by dormant bolt Small end positioning pin (4) and big end positioning pin (8) are fixed on bottom plate (1) respectively.
5. can not only be accurately positioned as claimed in claim 4 but also finishing connecting rod shape fixture convenient for loading and unloading, feature exist In (19) are sold at big end positioning pin mounting hole bottom setting bottom, and bottom sells (19) and passes through sunk screw and big end positioning pin (8) bottom Portion's connection, bottom pin (19) center open up threaded hole, and nut (11) is placed on bottom pin (19), nut (11) and the second tapered sleeve (15) Between have a gap, the second bolt (13) passes through nut (11) and is threadedly coupled afterwards with bottom pin (19).
6. can not only be accurately positioned as claimed in claim 5 but also finishing connecting rod shape fixture convenient for loading and unloading, feature exist It is additionally provided with the second pressing plate (12) between at the top of, second bolt (13) and big end positioning pin (8), the second pressing plate (12) cloth It sets above big end positioning pin and connecting rod tip.
7. can not only be accurately positioned as claimed in claim 6 but also finishing connecting rod shape fixture convenient for loading and unloading, feature exist In, be provided with the first pressing plate (9) on the installation edge of the big end positioning pin (8), the first pressing plate (9) pass through sunk screw install On big end positioning pin (8).
8. can not only be accurately positioned as claimed in claim 7 but also finishing connecting rod shape fixture convenient for loading and unloading, feature exist In being disposed radially several threaded holes on the installation edge of the big end positioning pin (8), the second tapered sleeve is provided on (15) Keyway corresponding with screw thread hole site, threaded hole is interior to be packed into the second screw (10), in the end insertion keyway of the second screw (10), Realize the axially position to the second tapered sleeve (15).
9. can not only be accurately positioned as claimed in claim 8 but also finishing connecting rod shape fixture convenient for loading and unloading, feature exist In the hardness of the swivel nut (18) is less than the hardness of removable pin (16), and the elasticity of the first spring (14) is much larger than second spring (17) elasticity.
10. can not only be accurately positioned as claimed in claim 9 but also finishing connecting rod shape fixture convenient for loading and unloading, feature exist In the both ends of the bottom plate (1) pass through bolt (20) respectively and nut (21) is fixed on platen;The both ends of bottom plate (1) Bottom is respectively arranged with key (2), and key (2) is fixed on bottom plate (1) by the first screw (3), on key (2) and platen Keyway cooperation, realizes the stationary positioned to bottom plate (1).
CN201910552397.8A 2019-06-25 2019-06-25 Clamp capable of accurately positioning and convenient to assemble and disassemble for finish machining of connecting rod appearance Active CN110170869B (en)

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CN201910552397.8A CN110170869B (en) 2019-06-25 2019-06-25 Clamp capable of accurately positioning and convenient to assemble and disassemble for finish machining of connecting rod appearance

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CN201910552397.8A CN110170869B (en) 2019-06-25 2019-06-25 Clamp capable of accurately positioning and convenient to assemble and disassemble for finish machining of connecting rod appearance

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CN110170869B CN110170869B (en) 2021-03-23

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