CN103358150B - Crank pin end pore fixture for fine boring - Google Patents

Abstract

The invention discloses a precision boring jig for connecting rod big end holes, which comprises a bottom plate (1), a vertical plate (2) is arranged on the bottom plate (1), a clamp base (3) is provided on one side of the vertical plate (2), and a clamp base (3 ) is provided with a stopper (6) for positioning the connecting rod and a positioning pin (7) matching the small head hole of the connecting rod; a clamping mechanism is also provided on the clamp base (3), and the clamping mechanism includes a pressure plate (4), There is a pillar installation hole near the middle of the pressure plate (4), and a pillar (5) is provided on the clamp base (3). The pillar installation hole matches the pillar (5) and enables the pressure plate (4) to swing around the pillar (5) ; One end of the pressing plate (4) is the pressing end, and the other end is provided with a tightening mechanism that tightens the end. The principle of seesaw is used to realize the clamping. Each clamping only needs to rotate the screw rod (8) instead of the entire disassembly Fixtures, high clamping efficiency, greatly improving production efficiency. <!--1-->

Description

Connecting rod big hole fine boring fixture

technical field

The invention belongs to the field of connecting rod processing equipment, and in particular relates to a precision boring jig for a large end hole of a connecting rod.

Background technique

The traditional connecting rod big end hole fine boring fixture adopts the positioning method of setting positioning pins and stoppers on the bottom plate. The clamping mechanism is fastened by bolts. Every time a connecting rod is processed, the fixture needs to be disassembled. The processing efficiency is low and the labor intensity is high. Productivity.

Contents of the invention

The technical problem to be solved by the present invention is to provide a precision boring fixture for connecting rod big end holes with convenient clamping and high processing efficiency.

In order to solve the above technical problems, the technical solution adopted in the present invention is: a connecting rod big end hole fine boring fixture, including a bottom plate, a vertical plate is provided on the bottom plate, a clamp base is provided on one side of the vertical plate, and the clamp base There is a stopper for positioning the connecting rod and a positioning pin matching the small head hole of the connecting rod; a clamping mechanism is also provided on the base of the clamp, and the clamping mechanism includes a pressure plate, and a pillar is installed near the middle of the pressure plate. hole, the base of the clamp is provided with a pillar, and the mounting hole of the pillar is adapted to the pillar, and enables the pressure plate to swing around the pillar; one end of the pressure plate is a pressing end, and the other end is provided with a tightening mechanism that tightens the end .

The jacking mechanism includes a screw rod, which passes through the vertical plate and the fixture base, and is threadedly connected with the vertical plate. One end of the screw rod is in contact with one end of the pressing plate, and the other end is provided with a hand wheel.

A spring is sleeved on the pillar, and one end of the spring is in contact with the fixture base, and the other end is in contact with the pressing plate.

The vertical plate and the clamp base are provided with through holes corresponding to the big end holes of the connecting rod.

The number of pillar mounting holes on the pressing plate is not less than two.

The pillar installation hole is oval, and the diameter of the pillar installation hole is larger than the diameter of the pillar.

The vertical plate is bolted to the fixture base.

The advantage of the present invention is that the clamping mechanism utilizes the principle of a seesaw, and by pressing one end of the pressing plate, the other end of the pressing plate presses the connecting rod to achieve clamping. Each clamping only needs to rotate the screw rod instead of disassembling the entire clamp , High clamping efficiency, greatly improving production efficiency.

Description of drawings

Fig. 1 is the structure schematic diagram of a kind of connecting rod big end hole precision boring fixture of the present invention;

Fig. 2 is a structural schematic diagram of the fine boring fixture for the big head hole of the connecting rod in Fig. 1;

The marks in the above-mentioned figures are: 1, base plate, 2, vertical plate, 3, fixture base, 4, pressing plate, 5, pillar, 6, stopper, 7, positioning pin, 8, screw mandrel, 9, hand wheel.

detailed description

Fig. 1 and Fig. 2 are the schematic structural diagrams of a fine boring jig for a connecting rod big end hole according to the present invention, including a bottom plate 1, a vertical plate 2 is arranged on the bottom plate 1, a clamp base 3 is provided on one side of the vertical plate 2, and a positioning The stopper 6 of the connecting rod and the positioning pin 7 adapted to the small head hole of the connecting rod; the clamp base 3 is also provided with a clamping mechanism, the clamping mechanism includes a pressure plate 4, and a pillar mounting hole is provided near the middle of the pressure plate 4, and the clamp base 3 A pillar 5 is arranged on the top, and the pillar mounting hole is adapted to the pillar 5, and the pressing plate 4 can swing around the pillar 5;

The jacking mechanism comprises a screw mandrel 8, which passes through the vertical plate 2 and the clamp base 3, and is threadedly connected with the vertical plate 2, and one end of the screw mandrel 8 is in contact with one end of the pressing plate 4, and the other end is provided with a handwheel 9. A spring is set on the pillar 5, one end of the spring is in contact with the clamp base 3, and the other end is in contact with the pressure plate 4, because the pillar 5 and the pillar mounting hole are clearance fit, the spring can press the pressure plate 4 tightly, so that the pressure plate 4 will not shake on the pillar 5. The vertical plate 2 and the fixture base 3 are provided with a through hole corresponding to the big end hole of the connecting rod, and the boring tool can pass through the through hole and can play a role in chip removal.

The support mounting holes on the pressing plate 4 can be provided with multiple, so as to be suitable for connecting rods of different sizes, and have high versatility.

The pillar mounting hole is oval, and the aperture of the pillar mounting hole is larger than the diameter of the pillar 5, so that the pressing plate 4 can swing around the pillar 5. The vertical plate 2 is bolted to the clamp base 3 .

After adopting such a structure, the clamping mechanism utilizes the principle of a seesaw, presses one end of the pressing plate 4 tightly, and makes the other end of the pressing plate 4 press the connecting rod to realize clamping, and only needs to rotate the screw rod 8 for each clamping, instead of the entire Disassembly and assembly of fixtures, high clamping efficiency, greatly improving production efficiency.

The present invention has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-mentioned manner, as long as various insubstantial improvements are adopted from the method concept and technical solutions of the present invention, or there is no improvement Directly applying the conception and technical solutions of the present invention to other occasions falls within the protection scope of the present invention.

Claims (2)

1. A connecting rod big end hole fine boring fixture, it is characterized in that, comprises base plate (1), and described base plate (1) is provided with vertical plate (2), and described vertical plate (2) one side is provided with fixture base (3 ), the clamp base (3) is provided with a stopper (6) for positioning the connecting rod and a positioning pin (7) compatible with the small head hole of the connecting rod; the clamp base (3) is also provided with a clamping mechanism , the clamping mechanism includes a pressure plate (4), a pillar mounting hole is provided near the middle of the pressure plate (4), a pillar (5) is provided on the clamp base (3), and the pillar mounting hole is connected to the pillar (5) ), and enable the pressing plate (4) to swing around the pillar (5); one end of the pressing plate (4) is a pressing end, and the other end is provided with a tightening mechanism for tightening the end; The support (5) is covered with a spring, one end of the spring is in contact with the clamp base (3), and the other end is in contact with the pressure plate (4); Described jacking mechanism comprises screw mandrel (8), and described screw mandrel (8) passes vertical plate (2) and fixture base (3), and is threadedly connected with vertical plate (2), and one end of screw mandrel (8) It is in contact with one end of the pressure plate (4), and the other end is provided with a hand wheel (9); The pillar installation hole is oval, and the diameter of the pillar installation hole is larger than the diameter of the pillar (5). 2 . The precision boring jig for connecting rod big end hole according to claim 1 , characterized in that, the vertical plate ( 2 ) and the jig base ( 3 ) are provided with through holes corresponding to the connecting rod big end hole. 3 .