A kind of part clamp mechanism and method for using thereof
Technical field
The present invention relates to a kind of part clamp mechanism and method for using thereof, especially relate to a kind of clamp mechanism that is used for plastic casing parts such as automobile instrument, oil pump.
Background technology
In automobile zero, parts, having some to resemble automobile instrument, oil pump etc. is the plastic casing part, and in production and testing process, the outer surface of these parts is to need to lay special stress on protecting, and a bit scuffing and impression can not be arranged.For the accuracy of assembling and detecting, shell is accurately positioned and pneumatic pinch often.
General apparatus for production line is to adopt cylinder to drive the lever upset to clamp part; The essential defect of this clamping mode is: because clamping point walks at the head of lever is circular curve; Therefore pressure head can have micro displacement at piece surface when touching piece surface and continuing to clamp; And this micro displacement can form scuffing at piece surface, influences the presentation quality of product.
Summary of the invention
Technical problem to be solved by this invention is to the problem that exists in the prior art a kind of part clamp mechanism and method for using thereof to be provided; Its objective is under the prerequisite that keeps the pressure head flipped form; Avoid clamping process that piece surface is produced and scratch, guarantee the presentation quality of part.
Technical scheme of the present invention is that this kind part clamp mechanism comprises workbench and is installed in cylinder and the turnover panel seat on the workbench; Pitman shaft is arranged in the endoporus of turnover panel seat; And pitman shaft is connected with the output of cylinder; Cylinder drivening rod axle moves in the turnover panel seat, and the other end of described pitman shaft is connected with clamping plate through a connecting rod that can change the direction of motion, drives clamping plate and does vertically perhaps to rotatablely move.
The described connecting rod that changes the direction of motion is a curve connecting rod with certain angle, and the curve connecting rod is fixed on the turnover panel seat through the upset pivot pin.
Be positioned at described curve connecting rod and be provided with the curved groove with certain angle, the upset pivot pin is positioned at this curved groove, and the curve connecting rod is the motion that fixing point is made the different directions consistent with the curve of curved groove with the upset pivot pin.
The length control of the vertical direction of the curved groove on the described curve connecting rod clamps the distance of part, the flip angle of the distance control clamping plate of incline direction.
Angular range between adjacent two limits of curved groove on the described curve connecting rod is 0 °-180 °.
The method of utilizing described a kind of part clamp mechanism to clamp, unclamp is specially:
1) when cylinder stretches out, the curve connecting rod drives clamping plate, and under the restriction of upset pivot pin, clamped part is unclamped in curved groove motion at first vertically;
2) along inclined direction curved groove motion then, clamping plate produces upset;
3) when cylinder is withdrawn, the curve connecting rod drives clamping plate, and under the restriction of upset pivot pin, curved groove motion at first along inclined direction makes clamping plate produce upset;
4) vertically curved groove motion then vertically clamps part.
The curved groove length of vertical direction can be controlled the distance of vertical clamping part on the adjustment curve connecting rod.
The tilt angle of curved groove of direction of adjustment curve connecting rod can be adjusted the flip angle of clamping plate.
A kind of part clamp mechanism and method for using thereof with said structure have the following advantages:
1, this kind part clamp mechanism had both kept the pressure head flipped form, had guaranteed the vertical clamping of turnover panel to part again, avoided pressure head in the process of motion, can hinder picking and placeing of part, guaranteed again simultaneously can not produce the surface of part in the clamping process to scratch.
2, this kind part clamp mechanism adopts the linkage principle; Simple in structure, take up room little; Be applicable to the automation clamping of various parts; As long as guarantee the curved groove sufficient length of vertical direction on the curve connecting rod, clamp mechanism just can be to identical location external form and honest and kind different polytypic part clamps.
3,, change clamping plate easily and just can the part that difference clamps curved surface be clamped because clamping plate is to adopt locating slot to locate a back screw to install.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described further:
Fig. 1 is a structural representation of the present invention.
In Fig. 1,1: cylinder; 2: pitman shaft; 3: the turnover panel seat; 4: the upset pivot pin; 5: the curve connecting rod; 6: clamping plate; 7: workbench.
The specific embodiment
Structure shown in Figure 1 is the structural representation of this kind part clamp mechanism; This clamp mechanism comprises workbench 7 and is installed in the cylinder 1 and turnover panel seat 3 on the workbench 7; Pitman shaft 2 is arranged in the endoporus of turnover panel seat 3; And pitman shaft 2 is threaded with the output of cylinder 1, and cylinder 1 drivening rod axle 2 moves in turnover panel seat 3, and pitman shaft 2 can cooperate mobile at turnover panel seat 3 hole internal clearances; The other end of pitman shaft 2 is connected with clamping plate 6 through a connecting rod that can change the direction of motion; Driving clamping plate 6 does vertically perhaps to rotatablely move; The connecting rod that changes the direction of motion is a curve connecting rod 5 with certain angle, and curve connecting rod 5 is fixed on the turnover panel seat 3 through upset pivot pin 4.Be positioned at curve connecting rod 5 and be provided with the curved groove with certain angle, upset pivot pin 4 is positioned at this curved groove, and curve connecting rod 5 is the motion that fixing point is made the different directions consistent with the curve of curved groove with upset pivot pin 4.The length control of the vertical direction of the curved groove on the curve connecting rod 5 clamps the distance of part, the flip angle of the distance control clamping plate 6 of incline direction.The other end of pitman shaft 2 is connected with curve connecting rod 5 shaft holes pin gap; The curved groove that upset pivot pin 4 passes curve connecting rod 5 is riveted on the turnover panel seat 3; Curved groove and upset pivot pin 4 matched in clearance; Clamping plate 6 screws are connected in the other end of curve connecting rod 5.Angular range between adjacent two limits of curved groove on the curve connecting rod 5 is 0 °-180 °.
The method of utilizing this kind part clamp mechanism to clamp, unclamp is specially:
1) when cylinder 1 stretches out, curve connecting rod 5 drives clamping plate 6, and under the restriction of upset pivot pin 4, clamped part is unclamped in curved groove motion at first vertically;
2) along inclined direction curved groove motion then, clamping plate 6 produces upset;
3) when cylinder 1 withdrawal, curve connecting rod 5 drives clamping plate 6, and under the restriction of upset pivot pin 4, curved groove motion at first along inclined direction makes clamping plate 6 produce upset;
4) vertically curved groove motion then vertically clamps part.
The curved groove length of vertical direction can be controlled the distance of vertical clamping part on the adjustment curve connecting rod 5, and the tilt angle of curved groove of direction of adjustment curve connecting rod 5 can be adjusted the flip angle of clamping plate 6.
This kind part clamp mechanism had both kept the pressure head flipped form, had guaranteed the vertical clamping of turnover panel to part again, avoided pressure head in the process of motion, can hinder picking and placeing of part, guaranteed again simultaneously can not produce the surface of part in the clamping process to scratch.