CN102506928A

CN102506928A - Floating positioning mechanism

Info

Publication number: CN102506928A
Application number: CN2011103540582A
Authority: CN
Inventors: 林巨广; 王剑波; 赵强; 裴照明
Original assignee: Anhui JEE Automation Equipment Co Ltd
Current assignee: Anhui JEE Automation Equipment Co Ltd
Priority date: 2011-11-09
Filing date: 2011-11-09
Publication date: 2012-06-20

Abstract

The invention discloses a floating positioning mechanism, which adopts a positioning structure combining a support surface and positioning pins. The floating positioning mechanism is characterized in that the positioning pins are in clearance fit with pin holes on a tray; the bottom part of the tray for placing a workpiece is supported by floating supports distributed on different positions of the surface of a lifting table; and a top part support piece of the floating supports is an universal ball arranged between ball seats, and the ball seats are elastically supported by pressure springs. The floating positioning mechanism can simply position the tray and enables the tray to have a certain adjusting capability on two moving freedom degrees in the horizontal direction. The floating positioning mechanism can be used in the on-line measuring machine in the passenger car gearbox assembly line for ensuring the to-be-measured surface of the workpiece on the tray and measuring head to be centered and enabling the lower surface of the measuring head to be excellent surface contacted with the to-be-measured surface of the workpiece, as a result, the measuring precision is improved, the pass percent in cushion selecting is ensured, and the assembling efficiency is improved.

Description

A kind of floating positioning device

Technical field

The present invention relates to wheel box assembling field, a kind ofly more precisely be particularly suited for being applied in the floating positioning device in the passenger-car gear box assembly line on-line measurement machine.

Background technology

In the wheel box assembling process, the correctness of measurement choosing pad has significance to the assembly quality of whole wheel box, guarantee that the on-line measurement machine reaches the high precision of assembly technology requirement, and the detent mechanism that holds water is primary prerequisite.Traditional mechanism adopts the mode of plane and two pits to position; In this locator meams; It between the pin-and-hole on register pin and the pallet wringing fit; Pallet two one-movement-freedom-degrees are in the horizontal direction limited fully, probably have the site error of horizontal direction on measuring machine gauge head and the measured surface of workpiece; In addition; When register pin is not when vertically stretching into pin-and-hole; Be easy to occur jam, cause pallet and register pin out of plumb, the perhaps inclination of left and right directions before and after promptly pallet exists; And workpiece is to be fitted on the pallet, can not form the situation that good face contacts so the on-line measurement machine measuring machine gauge head lower surface can often occur when measuring with the measured surface of workpiece.Depositing of these problems greatly greatly influenced measuring accuracy and measured accuracy, causes spacer thickness and the actual desired thickness selected for use to have error, increased the rework rate of assembling, and then influenced the beat balance of whole piece assembly line, seriously reduces efficiency of assembling.

Summary of the invention

The present invention is for avoiding above-mentioned existing in prior technology weak point; Provide a kind of being particularly suited for to be applied in the floating positioning device in the passenger-car gear box assembly line on-line measurement machine,, make on pallet two one-movement-freedom-degrees in the horizontal direction to have certain adjustment capability in the hope of can simply easily positioning to pallet; To guarantee the centering relation of workpiece measured surface and gauge head; And guarantee the pallet level and before and after not having or the inclination of left and right directions, and make that the gauge head lower surface forms good face with the workpiece measured surface when measuring to contact, improve measuring accuracy thus; Guarantee choosing pad percent of pass, improve efficiency of assembling.

Technical solution problem of the present invention adopts following technical scheme:

Floating positioning device of the present invention is to adopt the location structure that is combined by supporting surface and register pin; Be characterized between the pin-and-hole of register pin and pallet, adopting clearance fit, the bottom of pallet that is used for place work piece is by each the unsteady support bearing on the diverse location that is distributed in the lifting table table top; The top support of said unsteady support is the multi-directional ball that is arranged in the ball seat, and said ball seat is by the stage clip elastic bearing.

The characteristics of floating positioning device of the present invention also are: the structure of said unsteady support is set to: press spring base is set in base; Said stage clip is placed in the press spring base; The top of base has annular pressing plate; One ball seat shoulder is arranged on the excircle of said ball seat, withhold on the ball seat shoulder with said annular pressing plate, said multi-directional ball places ball seat.

Compared with present technology, beneficial effect of the present invention is embodied in:

1, the present invention carries out coarse positioning with register pin to pallet, makes on pallet two one-movement-freedom-degrees in the horizontal direction to have the adjustment capability of certain limit, locatees the problem that possibly have deviation in the horizontal direction thereby solved workpiece;

2, the present invention is provided with to float to support pallet is carried; Contact for point between support member and the pallet; Cooperate register pin and pin-and-hole to have the gap; When the measuring machine gauge head pressed down, pallet carried out self-adjusting jointly together with workpiece, had solved front and back that pallet and workpiece possibly exist or the problem that tilts;

3, the present invention can combine the measuring machine gauge head well with the workpiece measured surface, can guarantee measuring accuracy.For further accurately locating of workpiece is on the basis of coarse positioning, utilizes the machining hole of workpiece itself to carry out;

4, simple in structure, easy to operate, the accurate positioning of the present invention.The operator can carry out manual adjustments to the position on the pallet horizontal direction through the tolerance clearance between register pin and the pallet pin-and-hole.

Description of drawings

Fig. 1 is a facade structures synoptic diagram of the present invention;

Fig. 2 is a plan structure synoptic diagram of the present invention;

Fig. 3 is the unsteady supporting construction synoptic diagram of the present invention;

Label among the figure: 1 pallet; The 1a pin-and-hole; 2 register pins; 3 lifting table table tops; 4 float supports; The 4a ball seat; 4b ball seat shoulder; 5 bases; 6 stage clips; 7 multi-directional ball; 8 pressing plates; 9 gauge heads; 10 workpiece.

Embodiment

Referring to Fig. 1, Fig. 2; Floating positioning device is to adopt the location structure that is combined by supporting surface and register pin in the present embodiment; Between the pin-and-hole 1a of register pin 2 and pallet 1, adopt clearance fit; So that pallet 1 can be done the adjustment of certain limit in the horizontal direction, the bottom that is used for the pallet 1 of place work piece 10 is carried by each support 4 of floating on the diverse location that is distributed in lifting table table top 3; The top support of unsteady support 4 is the multi-directional ball 7 that is arranged among the ball seat 4a, and ball seat 4a is by stage clip 6 elastic bearings.

Referring to Fig. 3; The structure of unsteady support 4 is set in the present embodiment: in base 5, press spring base is set; Stage clip 6 is placed in the press spring base, and the top of base 5 has annular pressing plate 8, and a ball seat shoulder 4b is arranged on the excircle of ball seat 4a; Withhold on ball seat shoulder 4b with annular pressing plate 8, multi-directional ball 7 places ball seat 4a.When pallet 1 and workpiece 10 press down, keep the base plane of ball seat 4a not touch base 5, keep the elastic bearing state of ball seat 4a on stage clip 6.

In the practical implementation, as shown in Figure 2, float to support 4 and be provided with four, be distributed on the position near four sides of lifting table table top 3; Register pin 2 and the corresponding pin-and-hole 2a that is provided with are two groups, are distributed on two place's diagonal positions of lifting table table top 3.

When lifting table table top 3 rises; Two register pins stretch in the pin-and-hole of pallet; Because the clearance fit of register pin and pin-and-hole; When measuring machine drives gauge head 9 and descends, can according to actual conditions to pallet before and after carrying out on the surface level or about manual adjustments, guarantee gauge head 9 and workpiece 10 measured surface to neutrality.When gauge head 9 is pressed onto on the measured surface of workpiece 10,, be to utilize the elastic force of stage clip 6 to carry out self-regulation, in order to guarantee the applying of gauge head and workpiece measured surface because the bottom of pallet 1 is to support to float to carry.

Claims

1. floating positioning device; The location structure that employing is combined by supporting surface and register pin; It is characterized in that between the pin-and-hole (1a) of register pin (2) and pallet (1), adopting clearance fit, the bottom that is used for the pallet (1) of place work piece (10) is carried by each support (4) of floating on the diverse location that is distributed in lifting table table top (3); The top support of said unsteady support (4) is for to be arranged on the multi-directional ball (7) in the ball seat (4a), and said ball seat (4a) is by stage clip (6) elastic bearing.

2. floating positioning device according to claim 1; The structure that it is characterized in that said unsteady support (4) is set to: in base (5), press spring base is set; Said stage clip (6) is placed in the press spring base, and the top of base (5) has annular pressing plate (8), and a ball seat shoulder (4b) is arranged on the excircle of said ball seat (4a); Withhold on ball seat shoulder (4b) with said annular pressing plate (8), said multi-directional ball (7) places ball seat (4a).