CN209206972U - It is a kind of to tense error prevention device using eccentric - Google Patents

Abstract

Error prevention device is tensed using eccentric the utility model discloses a kind of, including eccentric rabbet seat, eccentric tensioning ring and eccentric strain pin, the first groove that the top of eccentric rabbet seat is equipped with, the bottom of first groove is equipped with first through hole, mounting hole there are four being set around first through hole, eccentric tensioning ring includes that pull rod and the bias being arranged at the top of pull rod tense head, bias tenses head and is equipped with the second horizontal through-hole, second through-hole wall is equipped with the second groove, the flanged screw shell of inner wall is equipped in second groove, the two sides of second through-hole are equipped with third through-hole, mandril is equipped in third through-hole, mandril is engaged with screw shell by screw thread, the side wall of eccentric strain pin is equipped with third groove.The utility model can eliminate gap, improve the stability of piston installation, moreover it is possible to prevent piston anti-loaded to achieve the purpose that mistake proofing；In addition, eccentric tensioning ring need not be replaced repeatedly with eccentric strain pin, the manufacturing cost of frock clamp is reduced.

Description

It is a kind of to tense error prevention device using eccentric

Technical field

It is the utility model relates to Piston Machining technical field, in particular to a kind of to tense error prevention device using eccentric.

Background technique

Industry inner piston combustion chamber is generally eccentric structure at present, and the finishing of piston bias combustion chamber needs to stop using bias Mouth seat and tensioning ring tooling, the current eccentric error prevention device that tenses mainly includes eccentric rabbet seat, eccentric tensioning ring and bias Strain pin.But due to the mode that eccentric tensioning ring and eccentric strain pin are transition fit, between existing centainly between the two Gap, this will cause certain dimensional discrepancy for the finishing in piston combustion bowl later period, is unfavorable for the Precision Machining of piston；And And clamping will be come using the different eccentric error prevention devices that tenses for the Piston Machining of same model homologous series difference dimensions, Virtually increase the manufacturing cost of frock clamp.

Utility model content

The utility model the above-mentioned prior art there are aiming at the problem that, provide and a kind of tense error prevention device using eccentric.

The utility model is realized by following technological means solves above-mentioned technical problem:

It is a kind of to tense error prevention device, including eccentric rabbet seat, eccentric tensioning ring and eccentric strain pin using bias, it is described The top of eccentric rabbet seat is equipped with the first groove, and the bottom of first groove is equipped with first through hole, the week of the first through hole It encloses and sets there are four mounting hole, four mounting holes are uniformly distributed around the central axis of first through hole；The bias tensioning ring includes and the The pull rod of one through-hole adaptation, the top of the pull rod are equipped with eccentric tension head, and the eccentric head that tenses is equipped with horizontal second Through-hole, second through-hole wall are equipped with the second groove, the screw shell of adaptation, the screw thread are equipped in second groove Sleeve and the second groove are rotatablely connected, and the internal diameter of the screw shell is identical as the second through-hole diameter, outside the screw shell Wall is equipped with screw thread, and the inner wall of the screw shell is equipped with a flange, and the two sides of second through-hole are equipped with two symmetrically Third through-hole, the third through-hole intersects connection with the second through-hole, mandril, the side of the mandril is equipped in the third through-hole Wall is equipped with the screw thread with threaded adapter on screw shell outer wall；The side wall of the bias strain pin, which is equipped with, to be adapted to flange Third groove.

The both ends of the mandril are fixed with resin mat as a further improvement of the utility model,.

First groove is set for the eccentric with first through hole as a further improvement of the utility model,.

The utility model has the following beneficial effects: (1) the utility model, in the case where piston is anti-loaded, eccentric strain pin can not It is inserted into eccentric tensioning ring, to achieve the purpose that mistake proofing；

(2) the utility model can eliminate the gap between eccentric tensioning ring and piston combustion bowl, improve the steady of piston installation It is qualitative；

(3) the eccentric tensioning ring of the utility model and eccentric strain pin can be applicable in same model homologous series difference dimensions Piston reduces the manufacturing cost of frock clamp without multiple replacement.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model bias tensioning ring；

Fig. 2 is the structural schematic diagram that the utility model bias tenses head；

Fig. 3 is the structural schematic diagram of the utility model bias rabbet seat；

Fig. 4 is the cross-sectional view of A--A in Fig. 3；

Fig. 5 is the structural schematic diagram of the utility model bias strain pin；

Fig. 6 is the assembling schematic diagram of the utility model.

Specific embodiment

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to The range of the utility model protection.

Embodiment

As shown in Fig. 1 to 5, it is a kind of using it is eccentric tense error prevention device, including eccentric rabbet seat 10, eccentric tensioning ring 20 with And eccentric strain pin 30, it is circular first groove 11 that the top of the bias rabbet seat 10, which is equipped with cross section, and described first is recessed It is circular first through hole 12 that the bottom of slot 11, which is equipped with cross section, is set around the first through hole 12 there are four mounting hole 13, Four mounting holes 13 are uniformly distributed around the central axis of first through hole 12；The bias tensioning ring 20 includes being adapted to first through hole 12 Pull rod 21, the top of the pull rod 21 be equipped with it is eccentric tense head 22, it is described eccentric to tense head 22 to be equipped with horizontal second logical Hole 23, second through-hole 23 are arranged perpendicular to pull rod 21, and 23 inner wall of the second through-hole is equipped with the second groove 24, and described the The screw shell 25 of adaptation is equipped in two grooves 24, the screw shell 25 and the second groove 24 are rotatablely connected, the thread bush The internal diameter of cylinder 25 is identical as 23 diameter of the second through-hole, and the outer wall of the screw shell 25 is equipped with screw thread, the screw shell 25 Inner wall be equipped with a flange 26, the two sides of second through-hole 23 are equipped with two symmetrical third through-holes 27, the third Through-hole 27 intersects connection with the second through-hole 23, i.e. third through-hole 27 intersects with the cross circular section of the second through-hole 23, and the third is logical Mandril 28 is equipped in hole 27, the side wall of the mandril 28 is equipped with the screw thread with threaded adapter on 25 outer wall of screw shell, described Screw shell 25 is engaged with mandril 28 by the screw thread on outer wall；The side wall of the bias strain pin 30 is equipped with suitable with flange 26 The third groove 31 matched.

Further, as shown in Fig. 2, the both ends of the mandril 28 are fixed with resin mat 29, resin mat is piston contact When have certain resiliency, while there is biggish frictional behaviour, can be well protected and fixed piston.

Further, as shown in Figures 3 and 4, first groove 11 is set for the eccentric with first through hole 12, i.e. the first groove 11 central axis is not overlapped with the central axis of first through hole 12, manufactures the effect of eccentric positioning, with eccentric tensioning ring 20 and partially The cooperation of heart strain pin 30 can accurately detect whether the direction of piston fills pair.

Working principle: eccentric rabbet seat 10 is fixedly mounted on machining tool with bolt by mounting hole 13 and adjusts school Eccentric tensioning ring 20 is fixed in first through hole 12 by standard, and eccentric tensioning ring 20 is less than 0.05mm with 12 transition of first through hole, will Piston to be processed is mounted on eccentric rabbet seat 10 after pulling line by processing request, and eccentric strain pin 30 is inserted into eccentric tensioning ring In 20 the second through-hole 23, piston is tensed on eccentric rabbet seat 10, eccentric strain pin 30 and piston pin hole diameter transition are small In 0.05mm, for the smooth pore size of piston combustion bowl bias transitional pore unanimously with tensioning ring transition gap 0.05mm, eccentric annular distance is straight Diameter meets piston pin hole bias diametric requirements less than 0.1mm；Eccentric strain pin 30 is inserted into the second through-hole of eccentric tensioning ring 20 When 23, flange 26 and the cooperation of third groove 31 must can be inserted into, rotating eccentricity strain pin 30 and drive screw shell after insertion 25 rotations, the mandril 28 being adapted to screw shell 25 will move under the driving of screw thread along third through-hole 27 to be fired until with piston Chamber interior walls are burnt to contact and hold out against；Since the first groove 11 is set for the eccentric with first through hole 12, and correspond to piston combustion bowl Eccentric structure, when piston combustion bowl installation it is anti-when, first through hole 12 it is corresponding with the eccentric transitional pore of piston combustion bowl not on, Eccentric strain pin 30 can not be inserted into eccentric tensioning ring 20 at this time, and worker side can turn piston combustion bowl and reinstall.

It should be noted that, in this document, such as first and second or the like relational terms are used merely to one if it exists A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to Cover non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes those Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or setting Standby intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that There is also other identical elements in the process, method, article or apparatus that includes the element.

Above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although referring to aforementioned reality Example is applied the utility model is described in detail, those skilled in the art should understand that: it still can be to preceding Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these It modifies or replaces, the spirit and model of various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution It encloses.

Claims (3)

1. a kind of tense error prevention device using eccentric, including eccentric rabbet seat (10), eccentric tensioning ring (20) and bias tense It sells (30), which is characterized in that the top of the bias rabbet seat (10) is equipped with the first groove (11), first groove (11) Bottom is equipped with first through hole (12), sets that there are four mounting hole (13), four mounting holes (13) around the first through hole (12) Central axis around first through hole (12) is uniformly distributed；The bias tensioning ring (20) includes the pull rod being adapted to first through hole (12) (21), the top of the pull rod (21) is equipped with eccentric tension head (22), and described eccentric tense head (22) are equipped with horizontal second Through-hole (23), the second through-hole (23) inner wall are equipped with the second groove (24), and adaptation is equipped in second groove (24) Screw shell (25), the screw shell (25) and the second groove (24) are rotatablely connected, the internal diameter of the screw shell (25) with Second through-hole (23) diameter is identical, and the outer wall of the screw shell (25) is equipped with screw thread, the inner wall of the screw shell (25) It is equipped with a flange (26), the two sides of second through-hole (23) are equipped with two symmetrical third through-holes (27), the third Through-hole (27) intersects connection with the second through-hole (23), is equipped with mandril (28) in the third through-hole (27), the mandril (28) Side wall is equipped with the screw thread with threaded adapter on screw shell (25) outer wall；It is described bias strain pin (30) side wall be equipped with The third groove (31) of flange (26) adaptation.

2. a kind of as described in claim 1 tense error prevention device using eccentric, which is characterized in that the both ends of the mandril (28) It is fixed with resin mat (29).

A kind of tense error prevention device using eccentric 3. as described in claim 1, which is characterized in that first groove (11) with First through hole (12) is set for the eccentric.