CN202668210U

CN202668210U - Boring positioning mechanism for self-centering connecting rod

Info

Publication number: CN202668210U
Application number: CN 201220351570
Authority: CN
Inventors: 谢涛
Original assignee: KUNSHAN CHAITAI XINCHENG PRECISION FORGING CO Ltd
Current assignee: KUNSHAN CHAITAI XINCHENG PRECISION FORGING CO Ltd
Priority date: 2012-07-19
Filing date: 2012-07-19
Publication date: 2013-01-16
Anticipated expiration: 2022-07-19

Abstract

The utility model discloses a boring positioning mechanism for a self-centering connecting rod, which comprises a spindle, a compressing spring, a bolt, a cylindrical centering block and a longitudinally arranged cylindrical core sleeve, wherein the core sleeve comprises an upper core sleeve and a lower core sleeve; the interiors of the upper core sleeve and the lower core sleeve are both hollow; the spindle and the compressing spring are moveably arranged in the lower core sleeve; the compressing spring is arranged at the lower end of the spindle and is fixedly connected with the spindle; the bolt is arranged at the lower end of the compressing spring and is fixedly connected with the compressing spring; the bolt passes through the lower end of the lower core sleeve and is fixed with an inner wall of the lower core sleeve; the upper end of the spindle passes through the upper end of the lower core sleeve; the centering block is fixedly arranged on the spindle at the upper end of the lower core sleeve; the spindle is located at the center of the centering block; the upper core sleeve is arranged at the top of the spindle; and clearances are respectively arranged between the upper core sleeve and the centering block and between the centering block and the lower core sleeve. The boring positioning mechanism for the self-centering connecting rod can accurately position through the cooperation of the compressing spring, the centering block and the spindle, and the boring precision is ensured.

Description

Self-centering connection rod bore detent mechanism

Technical field

The utility model relates to a kind of detent mechanism, relates in particular to a kind of self-centering connection rod bore detent mechanism.

Background technology

The aperture in connecting rod small end of engine hole and circularity thereof and cylindricity tolerance require extremely strict, be equivalent to the IT5-IT6 level, for reaching this requirement, connecting rod small end hole will be through boring, rough bore, the multiple working procedures such as half right boring hole and right boring hole, especially in the operation of right boring hole, reason owing to position error, cause the hole not wait at the allowance of circumferencial direction, the location structure of present stage adopts an alignment pin location, the shortcoming of this kind detent mechanism is: can easily enter in the connecting rod aperture in order to guarantee alignment pin, and consider linkage plane to the perpendicularity problem in hole, the gap that must put 0.03mm-0.05mm, still, will cause like this connecting rod aperture center and alignment pin center to produce skew, the inclined to one side phenomenon of boring finally can occur when bore hole, if boring cutter is inconsistent in the surplus of circumferencial direction in the processing tie rod holes, finally causes the circularity of bore hole metapore to become large.

The utility model content

The purpose of this utility model is for above-mentioned the deficiencies in the prior art, and the self-centering connection rod bore detent mechanism of the precision positioning of a kind of energy, assurance bore hole precision is provided.

The technical solution of the utility model is achieved in that a kind of self-centering connection rod bore detent mechanism, it comprises mandrel, Compress Spring, screw, cylindrical center bridge, the cylindrical core retainer plate that vertically arranges, described core retainer plate comprises the upper core retainer plate of inner hollow and the lower core retainer plate of inner hollow, described mandrel, the Compress Spring activity is located in the described lower core retainer plate, described Compress Spring is located at the lower end of described mandrel and is fixedly connected with it, described screw is located at the lower end of described Compress Spring and is fixedly connected with it, described screw passes the lower end of described lower core retainer plate and fixes with its inwall, the upper end of described lower core retainer plate is passed in the upper end of described mandrel, described center bridge is fixed on the mandrel that passes lower core retainer plate upper end, described mandrel is positioned at the center of described center bridge, described upper core retainer plate is located at the top of described mandrel, between described upper core retainer plate and the center bridge, leave respectively the gap between described center bridge and the lower core retainer plate.

Preferably, the lower surface of described mandrel is concaved with the first groove, and the upper surface of described screw is concaved with the second groove, and the upper end of described Compress Spring embeds in described the first groove, and the lower end of described Compress Spring embeds in described the second groove.

Preferably, described center bridge is comprised of at least four centering plates, described at least four centering plates are uniformly distributed on the outer wall of described mandrel, the upper end of every described centering plate outer wall and lower end offer respectively draw-in groove, the draw-in groove of the upper end of described at least four centering plates surrounds the first circular draw-in groove, the draw-in groove of the lower end of described at least four centering plates surrounds the second circular draw-in groove, is respectively equipped with O type circle in the described first circular draw-in groove and the second circular draw-in groove.

Advantage of the present utility model: by the cooperation of Compress Spring, locating piece and mandrel, replaced the directly mode of location of traditional employing alignment pin, adopt this detent mechanism can be so that the center of center, tie rod holes footpath and detent mechanism can not produce skew, can accurately locate, and guarantee the precision of bore hole.

Description of drawings

The utility model is described in further detail below in conjunction with the embodiment in the accompanying drawing, but do not consist of any restriction of the present utility model.

Fig. 1 is the structural representation of present embodiment;

Fig. 2 is the cutaway view of A-A face among Fig. 1.

Among the figure:

The upper core retainer plate of 1-; The 2-center bridge; 3-O type circle; Core retainer plate under the 4-; The 5-mandrel; 6-the first groove; The 7-Compress Spring; 8-the second groove; The 9-screw; The 10-centering plate; 11-the first circular draw-in groove; 12-the second circular draw-in groove.

The specific embodiment

Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described in detail, thereby so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that protection domain of the present utility model is made more explicit defining.

Consult Fig. 1, shown in Figure 2, a kind of self-centering connection rod bore detent mechanism of present embodiment, it comprises mandrel 5, Compress Spring 7, screw 9, cylindrical center bridge 2, the cylindrical core retainer plate that vertically arranges, core retainer plate comprises the upper core retainer plate 1 of inner hollow and the lower core retainer plate 4 of inner hollow, mandrel 5, Compress Spring 7 activities are located in the lower core retainer plate 4, Compress Spring 7 is located at the lower end of mandrel 5 and is fixedly connected with it, screw 9 is located at the lower end of Compress Spring 7 and is fixedly connected with it, screw 9 passes the lower end of lower core retainer plate 4 and fixes with its inwall, the upper end of lower core retainer plate 4 is passed in the upper end of mandrel 5, center bridge 2 is fixed on the mandrel 5 that passes lower core retainer plate 4 upper ends, mandrel 5 is positioned at the center of center bridge 2, upper core retainer plate 1 is located at the top of mandrel 5, between upper core retainer plate 1 and the center bridge 2, leave respectively the gap between center bridge 2 and the lower core retainer plate 4.

Wherein, Compress Spring 7 is located at the structure of lower end of mandrel 5 and the structure of the lower end that screw 9 is located at Compress Spring 7 is: the lower surface of mandrel 5 is concaved with the first groove 6, the upper surface of screw 9 is concaved with the second groove 8, the upper end of Compress Spring 7 embeds in the first groove 6, and the lower end of Compress Spring 7 embeds in the second groove 8.

In addition, center bridge 2 is comprised of at least four centering plates 10, at least four centering plates 10 are uniformly distributed on the outer wall of mandrel 5, upper end and the lower end of every centering plate 10 outer walls offer respectively draw-in groove, the draw-in groove of the upper end of at least four centering plates 10 surrounds the first circular draw-in groove 11, the draw-in groove of the lower end of at least four centering plates 10 surrounds in the second circular draw-in groove 12, the first circular draw-in grooves 11 and the second circular draw-in groove 12 and is respectively equipped with O type circle 3.

In the time will carrying out the boring connecting rod small end hole, need to cooperate anchor clamps to use, this sleeve clamp is by this self-centering connection rod bore detent mechanism, pressing plate, the first oil cylinder, the second oil cylinder forms, this detent mechanism is positioned at the top of the first oil cylinder, and the output shaft of the first oil cylinder is fixedly connected with lower core retainer plate 4, pressing plate is positioned at the top of this detent mechanism, the output shaft of the second oil cylinder is fixedly connected with pressing plate, during use, the first oil cylinder starts, this detent mechanism of the first hydraulic oil cylinder driving moves upward, after putting on the center bridge 2 until the aperture of the connecting rod of boring, the second oil cylinder starts, the second hydraulic oil cylinder driving pressing plate compresses connecting rod downwards, because the aperture of connecting rod is enclosed within on the center bridge 2, and pressing plate compresses connecting rod downwards, then center bridge 2 is subject to connecting rod aperture inwall applied pressure at this moment, because center bridge 2 is fixed on the mandrel 5 that passes lower core retainer plate 4 upper ends, then center bridge 2 can band moving mandrel 5 move downward in the lump, thereby Compress Spring 7 is forced to compression, the Compress Spring 7 that then is forced to compress gives again mandrel 5 one elastic force that make progress, this elastic force forces center bridge 2 and the inwall of connecting rod aperture to fit tightly, reach accurate certralizing ability, then the first oil cylinder drives this detent mechanism again and moves downward to boring place of lathe, and then lathe can begin boring connecting rod aperture.

Above embodiment only is explanation technical conceive of the present utility model and characteristics; its purpose is to allow the people that is familiar with technique understand content of the present utility model and is implemented; can not limit protection domain of the present utility model with this; all equivalences of doing according to the utility model Spirit Essence change or modify, and all should be encompassed in the protection domain of the present utility model.

Claims

1. self-centering connection rod bore detent mechanism, it is characterized in that: it comprises mandrel, Compress Spring, screw, cylindrical center bridge, the cylindrical core retainer plate that vertically arranges, described core retainer plate comprises the upper core retainer plate of inner hollow and the lower core retainer plate of inner hollow, described mandrel, the Compress Spring activity is located in the described lower core retainer plate, described Compress Spring is located at the lower end of described mandrel and is fixedly connected with it, described screw is located at the lower end of described Compress Spring and is fixedly connected with it, described screw passes the lower end of described lower core retainer plate and fixes with its inwall, the upper end of described lower core retainer plate is passed in the upper end of described mandrel, described center bridge is fixed on the mandrel that passes lower core retainer plate upper end, described mandrel is positioned at the center of described center bridge, described upper core retainer plate is located at the top of described mandrel, between described upper core retainer plate and the center bridge, leave respectively the gap between described center bridge and the lower core retainer plate.

2. self-centering connection rod bore detent mechanism according to claim 1, it is characterized in that: the lower surface of described mandrel is concaved with the first groove, the upper surface of described screw is concaved with the second groove, the upper end of described Compress Spring embeds in described the first groove, and the lower end of described Compress Spring embeds in described the second groove.

3. self-centering connection rod bore detent mechanism according to claim 1, it is characterized in that: described center bridge is comprised of at least four centering plates, described at least four centering plates are uniformly distributed on the outer wall of described mandrel, the upper end of every described centering plate outer wall and lower end offer respectively draw-in groove, the draw-in groove of the upper end of described at least four centering plates surrounds the first circular draw-in groove, the draw-in groove of the lower end of described at least four centering plates surrounds the second circular draw-in groove, is respectively equipped with O type circle in the described first circular draw-in groove and the second circular draw-in groove.