CN217168345U - Device for press fitting of positioning pin for connecting rod - Google Patents

Abstract

The utility model discloses a device for connecting rod pressure equipment locating pin, mainly used saw off formula connecting rod locating pin's assembly. The main technical scheme is as follows: a bottom plate and a positioning plate are arranged at the left part of the base; a press-fitting fixing plate is arranged in the middle part and close to the bottom plate, and the two pull rods penetrate through the pushing block and the spring to be matched and connected with the press-fitting fixing plate; and in the right part, a right-angle block and a fixed block are arranged on the base, and an eccentric cam is arranged in the right-angle block and the fixed block. The utility model discloses an actual application proves: the phenomenon that special equipment and special clamps are needed in production and the production cost is high is fundamentally overcome. The device can be used universally, the production efficiency is obviously improved, the cost is greatly reduced, and the device meets the requirements of multi-variety and small-batch production.

Description

Device for press fitting of positioning pin for connecting rod

Technical Field

The utility model belongs to an instrument that machining used, mainly used saw off formula connecting rod locating pin's assembly specifically is used for the pressure equipment location of locating pin on the connecting rod lid, can also be used for the locating pin assembly of other similar products.

Background

The connecting rod is a core component of the engine (see fig. 1 and 2), generally comprises a connecting rod body a, a product positioning pin b, a connecting rod cover c and a bolt d, and the positioning mode of the connecting rod body a and the connecting rod cover c is that the positioning pin b is pressed on the connecting rod cover in an interference fit mode and then is installed in a matched mode with the connecting rod body. Such as: the tightening torque of the bolt, the roundness of the big end hole of the connecting rod, the assembly of the bearing bush and the qualification of the technical indexes such as the opening of the crankshaft and the assembly clearance of the connecting rod are influenced.

On a large-scale connecting rod batch production line, the press mounting of the positioning pin on the connecting rod cover is generally realized by adopting special equipment and a clamp, and when other connecting rods with different specifications and sizes are replaced, the adjustment is carried out according to requirements, so that the adjustment is complex and labor and time are wasted. However, for the production line of new connecting rod products of various types and small batches, the investment cost of the special equipment and the clamp is too high, and products of different specifications need to be frequently replaced by the corresponding clamp or special equipment, so that the production efficiency is low, more personnel and equipment are occupied, and the production cost is high, so that a new processing technology needs to be searched for, and the technical problem is solved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses technical problem and purpose that need solve are: according to the defects in the assembly of the positioning pin of the existing connecting rod cover, an improved connecting rod positioning pin press-fitting device is designed to replace the original press-fitting mode. Fundamentally overcomes need professional equipment and special fixture, and manufacturing cost is higher phenomenon, reaches anchor clamps and equipment general, improves production efficiency, reduce cost, adapts to the new product development of connecting rod, adapts to the demand of many varieties, small batch production.

The utility model discloses a main technical scheme: the device comprises a base, a bottom plate, a positioning plate, a press-fitting fixing plate, a press top, a spring, a propelling block, a pull rod, a right-angle block, a press column, an eccentric cam, a fixing block, a gasket, a nut, a friction ring, a wrench, a cover, a screw, a pin, a bush, a stop column and a positioning shaft, and is specifically structurally characterized in that the bottom plate is arranged on the base along the left part of a central line through the pin and the screw, and the positioning plate is arranged on the upper surface of the bottom plate through the pin and the screw; the middle position along the central line is tightly close to the bottom plate, a press mounting fixing plate is installed through a pin and a screw, a press top is installed in a hole of the press mounting fixing plate, two pull rods penetrate through holes on two sides of a pushing block and a spring, and threads of the pull rods are screwed into screw holes of the press mounting fixing plate; the bushing is embedded in a hole of the right-angle block along the right part of the central line, the right-angle block is installed on the base through a screw, the compression column is installed in a left-side hole of the right-angle block and is coaxial with the centers of the pushing block and the press-fitting fixing plate, the fixing block is installed through a screw, the right-angle block and the fixing block are provided with the eccentric cam, the front end of the eccentric cam is provided with the friction ring, the wrench and the cover, the rear end of the eccentric cam is fixed through the washer and the nut, and the eccentric cam can rotate under the action of the wrench; a positioning shaft is arranged on the lower right side of the positioning plate, and the retaining column is arranged on the lower right side of the base.

The utility model discloses an actual application proves: the design purpose is completely achieved, and the device has reasonable design, accurate positioning and convenient operation; the time for completing press fitting processing of the positioning pin of the connecting rod cover is reduced from the original 30 seconds to 5 seconds; the press fitting method can be suitable for press fitting of the connecting rod cover positioning pins with various specifications by replacing individual parts, saves a large amount of clamp manufacturing cost, only needs a common workbench, and reduces the cost to below 25 percent of the original cost; the installation and debugging are simple, the defects that the installation and debugging of the original clamp are complicated and the processing quality is stable are overcome, the fixture not only is suitable for the production of multiple varieties in small batches, but also can meet the requirement of large-scale production.

Drawings

The following describes in further detail embodiments of the present invention with reference to the accompanying drawings.

FIG. 1 is a front view of a sawn link.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a front view of the present invention.

Fig. 4 is a top view of fig. 3.

Fig. 5 is a front view of the press-fitting fixing plate 4.

Fig. 6 is a left side view of fig. 5.

Fig. 7 is a shape diagram of the eccentric cam 11.

Fig. 8 is a shape view of the positioning shaft 22.

Detailed Description

With reference to fig. 3 and 4, the main technical solution of the present invention is explained: the utility model discloses contain base 1, bottom plate 2, locating plate 3, pressure equipment fixed plate 4 (see fig. 5, 6), capping 5, spring 6, propulsion piece 7, pull rod 8, right-angle block 9, compression leg 10, eccentric cam 11 (see fig. 7), fixed block 12, packing ring 13, nut 14, friction ring 15, spanner 16, lid 17, screw 18, round pin 19, bush 20, bumping post 21, location axle 22 (see fig. 8), concrete structure: a bottom plate 2 is arranged on the base 1 along the left position of the central line through a pin 19 and a screw 18, and a positioning plate 3 is arranged on the upper surface of the bottom plate 2 through the pin and the screw; tightly abutting against the bottom plate 2 along the middle position of the central line, installing a press-mounting fixing plate 4 through a pin 19 and a screw 18, installing a press top 5 into a hole of the press-mounting fixing plate 4, penetrating two pull rods 8 into holes on two sides of a pushing block 7 and a spring 6, and screwing the threads of the pull rods 8 into screw holes of the press-mounting fixing plate 4; the right part of the central line is provided with a bush 20 which is embedded in a hole of a right-angle block 9, the right-angle block 9 is arranged on a base 1 through a screw 18, a compression column 10 is arranged in a left hole of the right-angle block 9 and is coaxial with the center of a pushing block 7 and a press-fitting fixing plate 4, a fixing block 12 is arranged through the screw 18, an eccentric cam 11 is arranged on the right-angle block 9 and the fixing block, the front end of the eccentric cam is provided with a friction ring 15, a spanner 16 and a cover 17, the rear end of the eccentric cam 11 is fixed through a gasket 13 and a nut 14, and the eccentric cam 11 can rotate under the action of the spanner; a positioning shaft 22 is arranged at the lower right side of the positioning plate 3, and a stop pillar 21 is arranged at the lower right side of the base 1.

Referring to fig. 1, 2 and 4, the connecting rod is of various specifications, and the positioning hole distance L, the width K and the thickness D of the connecting rod are different, so that the press-fitting fixing plate 4, the pushing block 7 and the positioning shaft 22 are respectively made into a series according to different sizes of the connecting rod in the design and manufacture, and the positioning shaft is made into different diameters phi for press-fitting.

Referring to fig. 1, 3 and 4, the working principle of the present invention is: firstly, respectively installing product positioning pins b into two press-fitting holes of a press-fitting fixing plate 4; secondly, placing the connecting rod cover c on the surface of the bottom plate 2 of the clamp, positioning and installing the connecting rod cover c and the positioning plate 3, and positioning the surface E of the connecting rod cover close to the positioning shaft 22; thirdly, the hexagonal hole wrench 16 is moved by hand to carry out press mounting on the product positioning pin b; fourthly, the hexagonal hole wrench 16 is reversed to reset; fifthly, taking out the pressed connecting rod cover c and transferring to the next process.

Referring to fig. 1 and 2, the utility model discloses the general product locating pin pressure equipment that is used for the connecting rod cap of various specifications only needs to change corresponding location axle 22, pressure equipment fixed plate 4 and propulsion piece 7 according to the thickness D of connecting rod cap, the centre-to-centre spacing L and the width K of product locating pin, can be used for the pressure equipment of the connecting rod cap product locating pin of different specifications.

At present the utility model discloses the product locating pin pressure equipment process that the specification has been used for multiple connecting rod covers such as D20, YAE, YC5, YY5, E15AA, EA10FF, E12, the effect is better.

Claims (1)

1. The utility model provides a device for connecting rod pressure equipment locating pin which characterized in that: the device comprises a base (1), a bottom plate (2), a positioning plate (3), a press-fitting fixing plate (4), a press top (5), a spring (6), a propelling block (7), a pull rod (8), a right-angle block (9), a press column (10), an eccentric cam (11), a fixing block (12), a gasket (13), a nut (14), a friction ring (15), a wrench (16), a cover (17), a screw (18), a pin (19), a bush (20), a stop column (21) and a positioning shaft (22), and is specifically structured that the bottom plate (2) is installed on the base (1) along the left part of a central line through the pin (19) and the screw (18), and the positioning plate (3) is installed on the upper surface of the bottom plate (2) through the pin and the screw; the middle position along the central line is tightly close to the bottom plate (2), a press-mounting fixing plate (4) is installed through a pin (19) and a screw (18), a press top (5) is installed in a hole of the press-mounting fixing plate (4), two pull rods (8) penetrate through two side holes of a pushing block (7) and a spring (6), and threads of the pull rods (8) are screwed into screw holes of the press-mounting fixing plate (4); the right-angle compression device is characterized in that a bushing (20) is embedded in a hole of a right-angle block (9) along the right part of a central line, the right-angle block (9) is installed on a base (1) through a screw (18), a compression column (10) is installed in a left-side hole of the right-angle block (9) and is coaxial with a pushing block (7) and the center of a press-fitting fixing plate (4), a fixing block (12) is installed through the screw (18), an eccentric cam (11) is installed on the right-angle block (9) and the fixing block, a friction ring (15), a wrench (16) and a cover (17) are installed at the front end of the eccentric cam, the rear end of the eccentric cam (11) is fixed through a gasket (13) and a nut (14), and the eccentric cam (11) can rotate under the action of the wrench; a positioning shaft (22) is arranged at the right lower side of the positioning plate (3), and a stop column (21) is arranged at the right lower side of the base (1).

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