CN107030509A - A kind of turning attachment of turning engine link - Google Patents

Abstract

The invention relates to a lathe fixture for turning an engine connecting rod, which includes a clamp body, a large-end positioning pin, a small-end positioning pin, a connecting rod, a nut, and a pressure plate. A cylinder is arranged on a connecting plate at one end of the clamp body, and a There is a center hole, and a plane is processed in the middle, and two notches are vertically arranged on the plane; the positioning pin of the head and the positioning pin of the small head are respectively installed in the corresponding notches on the clamp body through screws; the connecting rod is installed on the positioning pin of the large head and the On the small head positioning pin, the nut cooperates with the thread on the large head positioning pin, and the nut is tightened to fix the connecting rod on the clamp body through the pressure plate. When the main shaft of the machine tool rotates, the jaws on the lathe drive the clamp body to rotate, and the original turning tool on the machine tool can cut the connecting rod installed on the clamp body. The invention has the advantages of reasonable structure, simple manufacture, time-saving operation and high processing efficiency, and is an ideal lathe fixture for turning engine connecting rods.

Description

A lathe fixture for turning engine connecting rod

technical field

The invention relates to a lathe fixture, in particular to a lathe fixture for turning an engine connecting rod.

Background technique

We know that the engine connecting rod is an important part in the engine. Its structure is various. Some require the two sides of the big head hole to be circular arc surface structure. Tool processing, its investment cost and processing cost are higher. So far, there is no special lathe fixture for turning engine connecting rods on the market.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a lathe fixture for turning engine connecting rods with reasonable structure, simple manufacture, time-saving operation and high processing efficiency.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a lathe fixture for turning engine connecting rods, which includes a clamp body, a large-end positioning pin, a small-end positioning pin, a connecting rod, a nut, and a pressure plate. It is characterized in that: the clamp Specifically, there is a cylinder on one end of the connecting plate, and a center hole on the other end. A plane is machined in the middle, and two notches are vertically provided on the plane; The center hole on the clamp body; the big head positioning pin and the small head positioning pin are respectively installed in the corresponding notches on the clamp body by screws; the connecting rod is installed on the large head positioning pin and the small The threads on the positioning pin cooperate, and the nut is tightened to fix the connecting rod on the clamp body through the pressure plate. When the main shaft of the machine tool rotates, the claws on the lathe drive the clamp body to rotate, and the original turning tool on the machine tool can cut the connecting rod installed on the clamp body.

A counterweight is installed on the connecting plate of the clamp body through screws.

The plane on the clamp body is parallel to the centerline of the clamped connecting rod and lower than its centerline, and the center distance between the two notches is the same as the center distance between the big head hole and the small head hole of the connecting rod; Machined with threaded holes.

The lower end of the big head positioning pin has a convex stop, the diameter of the middle part is the same as the diameter of the big head hole of the connecting rod, and the upper end is processed with a thread that matches the nut, and the connecting rod is compressed by the pressure plate.

The diameter of the upper end of the small head positioning pin is the same as that of the small head hole of the connecting rod, and the lower end has a convex stop.

The present invention adopts the above-mentioned composition structure, installs and fixes the connecting rod on the clamp body, the claws on the lathe drive the clamp body to rotate, and the original turning tool on the machine tool can realize the cutting process on both sides of the big end hole of the connecting rod. Compared with the prior art, the invention has the advantages of reasonable structure, simple manufacture, time-saving operation and high processing efficiency, and is an ideal lathe fixture for turning engine connecting rods.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a structural schematic diagram of the assembled state of the present invention.

Fig. 2 is a schematic diagram of the structure along the direction B in Fig. 1 .

Fig. 3 is a schematic diagram of the structure along the direction A-A in Fig. 2 .

In the figure 1. Claw, 2. Counterweight, 3. Screw, 4. Screw, 5. Small head positioning pin, 6. Clamp body, 7. Connecting rod, 8. Screw, 9. Big head positioning pin, 10. Nut, 11. pressing plate, 12. top, 13. turning tool.

detailed description

It can be seen from Fig. 1, Fig. 2 and Fig. 3 that a lathe fixture for turning an engine connecting rod includes a jaw 1, a counterweight 2, a small head positioning pin 5, a clamp body 6, a connecting rod 7, and a large head Locating pin 9, nut 10, pressing plate 11, top 12, turning tool 13 etc. The connecting plate at one end of the clamp body 6 is provided with a cylinder, and the other end is provided with a central hole, and a plane is processed in the middle, and there are two notches and several threaded holes perpendicular to the plane. The claw 1 on the lathe clamps the cylinder on the clamp body 6, and the top 12 clamps the center hole on the clamp body 6; Concretely in the corresponding notch on the 6; connecting rod 7 is installed on the big head locating pin 9 and the small head locating pin 5, and the screw thread on the nut 10 is matched with the big head locating pin 9, and the nut 10 is tightened to connect the connecting rod 7 by the pressing plate 11. Fixed on the clamp body 6. When the main shaft of the machine tool rotates, the claw 1 on the lathe drives the clamp body 6 to rotate, and the original turning tool 13 on the machine tool can cut the connecting rod 7 installed on the clamp body.

Further, a counterweight 2 is installed on the connecting plate of the clamp body 6 through screws 3 .

Further, the plane on the clamp body 6 is parallel to the centerline of the clamped connecting rod and lower than its centerline, and the center distance between the two concave notches is the same as the center distance between the big end hole and the small end hole of the connecting rod; Threaded holes are machined around the notch. It is convenient to install the large-end positioning pin 9 and the small-end positioning pin 5 for positioning the connecting rod 7 .

Further, the lower end of the big head positioning pin 9 has a convex stop, the diameter of the middle part of the big head positioning pin 9 is the same as the hole diameter of the big head hole of the connecting rod, and the upper end of the big head positioning pin 9 is processed with a thread that matches the nut 10, and the connecting rod is connected through the pressure plate 11. 7 for compression.

Further, the diameter of the upper end of the small head positioning pin 5 is the same as that of the small head hole of the connecting rod, and the lower end has a convex stop.

The present invention adopts the above-mentioned composition structure, installs and fixes the connecting rod on the clamp body, the claws on the lathe drive the clamp body to rotate, and the original turning tool on the machine tool can realize the cutting process on both sides of the big end hole of the connecting rod. The utility model has the advantages of reasonable structure, simple manufacture, time-saving operation and high processing efficiency, and is an ideal lathe fixture for turning engine connecting rods.

Claims (5)

1. a kind of turning attachment of turning engine link, it includes clamp body, major part alignment pin, microcephaly's alignment pin, connecting rod, nut, pressing plate, it is characterised in that：Described clamp body one end terminal pad is provided with a cylinder, and the other end is provided with centre bore, and centre is machined with a plane, plane vertical provided with two recessed seams；The cylinder of claw holing clip particularly on lathe, the top centre bore held out against on clamp body；The major part alignment pin and microcephaly's alignment pin are arranged on clamp body in corresponding recessed seam by screw respectively；Connecting rod is arranged on major part alignment pin and microcephaly's alignment pin, and the nut coordinates with the screw thread on major part alignment pin, tightens nut and connecting rod is fixed on clamp body by pressing plate.

2. the turning attachment of turning engine link according to claim 1, it is characterised in that：Balancing weight is provided with by screw in described clamp body terminal pad.

3. the turning attachment of turning engine link according to claim 1, it is characterised in that：Plane on described clamp body is parallel to clamped link centerline, and less than its center line, and the center spacing of two recessed seams is identical with crank pin end pore, small head bore centre-to-centre spacing；Hole is threaded around recessed seam.

4. the turning attachment of turning engine link according to claim 1, it is characterised in that：There is male half coupling described major part alignment pin lower end, and mid diameter is identical with crank pin end pore aperture, and upper end is machined with the screw thread coordinated with nut, and connecting rod is compressed by pressing plate.

5. the turning attachment of turning engine link according to claim 1, it is characterised in that：Described microcephaly's alignment pin upper end diameter is identical with connecting rod small end hole aperture, and there is male half coupling lower end.